s390/net/qeth_core_main.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 /*
0003  *    Copyright IBM Corp. 2007, 2009
0004  *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
0005  *       Frank Pavlic <fpavlic@de.ibm.com>,
0006  *       Thomas Spatzier <tspat@de.ibm.com>,
0007  *       Frank Blaschka <frank.blaschka@de.ibm.com>
0008  */
0009
0010 #define KMSG_COMPONENT "qeth"
0011 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
0012
0013 #include <linux/compat.h>
0014 #include <linux/module.h>
0015 #include <linux/moduleparam.h>
0016 #include <linux/string.h>
0017 #include <linux/errno.h>
0018 #include <linux/kernel.h>
0019 #include <linux/log2.h>
0020 #include <linux/io.h>
0021 #include <linux/ip.h>
0022 #include <linux/tcp.h>
0023 #include <linux/mii.h>
0024 #include <linux/mm.h>
0025 #include <linux/kthread.h>
0026 #include <linux/slab.h>
0027 #include <linux/if_vlan.h>
0028 #include <linux/netdevice.h>
0029 #include <linux/netdev_features.h>
0030 #include <linux/rcutree.h>
0031 #include <linux/skbuff.h>
0032 #include <linux/vmalloc.h>
0033
0034 #include <net/iucv/af_iucv.h>
0035 #include <net/dsfield.h>
0036 #include <net/sock.h>
0037
0038 #include <asm/ebcdic.h>
0039 #include <asm/chpid.h>
0040 #include <asm/sysinfo.h>
0041 #include <asm/diag.h>
0042 #include <asm/cio.h>
0043 #include <asm/ccwdev.h>
0044 #include <asm/cpcmd.h>
0045
0046 #include "qeth_core.h"
0047
0048 struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS] = {
0049     /* define dbf - Name, Pages, Areas, Maxlen, Level, View, Handle */
0050     /*                   N  P  A    M  L  V                      H  */
0051     [QETH_DBF_SETUP] = {"qeth_setup",
0052                 8, 1,   8, 5, &debug_hex_ascii_view, NULL},
0053     [QETH_DBF_MSG]   = {"qeth_msg", 8, 1, 11 * sizeof(long), 3,
0054                 &debug_sprintf_view, NULL},
0055     [QETH_DBF_CTRL]  = {"qeth_control",
0056         8, 1, QETH_DBF_CTRL_LEN, 5, &debug_hex_ascii_view, NULL},
0057 };
0058 EXPORT_SYMBOL_GPL(qeth_dbf);
0059
0060 static struct kmem_cache *qeth_core_header_cache;
0061 static struct kmem_cache *qeth_qdio_outbuf_cache;
0062 static struct kmem_cache *qeth_qaob_cache;
0063
0064 static struct device *qeth_core_root_dev;
0065 static struct dentry *qeth_debugfs_root;
0066 static struct lock_class_key qdio_out_skb_queue_key;
0067
0068 static void qeth_issue_next_read_cb(struct qeth_card *card,
0069                     struct qeth_cmd_buffer *iob,
0070                     unsigned int data_length);
0071 static int qeth_qdio_establish(struct qeth_card *);
0072 static void qeth_free_qdio_queues(struct qeth_card *card);
0073
0074 static const char *qeth_get_cardname(struct qeth_card *card)
0075 {
0076     if (IS_VM_NIC(card)) {
0077         switch (card->info.type) {
0078         case QETH_CARD_TYPE_OSD:
0079             return " Virtual NIC QDIO";
0080         case QETH_CARD_TYPE_IQD:
0081             return " Virtual NIC Hiper";
0082         case QETH_CARD_TYPE_OSM:
0083             return " Virtual NIC QDIO - OSM";
0084         case QETH_CARD_TYPE_OSX:
0085             return " Virtual NIC QDIO - OSX";
0086         default:
0087             return " unknown";
0088         }
0089     } else {
0090         switch (card->info.type) {
0091         case QETH_CARD_TYPE_OSD:
0092             return " OSD Express";
0093         case QETH_CARD_TYPE_IQD:
0094             return " HiperSockets";
0095         case QETH_CARD_TYPE_OSM:
0096             return " OSM QDIO";
0097         case QETH_CARD_TYPE_OSX:
0098             return " OSX QDIO";
0099         default:
0100             return " unknown";
0101         }
0102     }
0103     return " n/a";
0104 }
0105
0106 /* max length to be returned: 14 */
0107 const char *qeth_get_cardname_short(struct qeth_card *card)
0108 {
0109     if (IS_VM_NIC(card)) {
0110         switch (card->info.type) {
0111         case QETH_CARD_TYPE_OSD:
0112             return "Virt.NIC QDIO";
0113         case QETH_CARD_TYPE_IQD:
0114             return "Virt.NIC Hiper";
0115         case QETH_CARD_TYPE_OSM:
0116             return "Virt.NIC OSM";
0117         case QETH_CARD_TYPE_OSX:
0118             return "Virt.NIC OSX";
0119         default:
0120             return "unknown";
0121         }
0122     } else {
0123         switch (card->info.type) {
0124         case QETH_CARD_TYPE_OSD:
0125             switch (card->info.link_type) {
0126             case QETH_LINK_TYPE_FAST_ETH:
0127                 return "OSD_100";
0128             case QETH_LINK_TYPE_HSTR:
0129                 return "HSTR";
0130             case QETH_LINK_TYPE_GBIT_ETH:
0131                 return "OSD_1000";
0132             case QETH_LINK_TYPE_10GBIT_ETH:
0133                 return "OSD_10GIG";
0134             case QETH_LINK_TYPE_25GBIT_ETH:
0135                 return "OSD_25GIG";
0136             case QETH_LINK_TYPE_LANE_ETH100:
0137                 return "OSD_FE_LANE";
0138             case QETH_LINK_TYPE_LANE_TR:
0139                 return "OSD_TR_LANE";
0140             case QETH_LINK_TYPE_LANE_ETH1000:
0141                 return "OSD_GbE_LANE";
0142             case QETH_LINK_TYPE_LANE:
0143                 return "OSD_ATM_LANE";
0144             default:
0145                 return "OSD_Express";
0146             }
0147         case QETH_CARD_TYPE_IQD:
0148             return "HiperSockets";
0149         case QETH_CARD_TYPE_OSM:
0150             return "OSM_1000";
0151         case QETH_CARD_TYPE_OSX:
0152             return "OSX_10GIG";
0153         default:
0154             return "unknown";
0155         }
0156     }
0157     return "n/a";
0158 }
0159
0160 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
0161              int clear_start_mask)
0162 {
0163     unsigned long flags;
0164
0165     spin_lock_irqsave(&card->thread_mask_lock, flags);
0166     card->thread_allowed_mask = threads;
0167     if (clear_start_mask)
0168         card->thread_start_mask &= threads;
0169     spin_unlock_irqrestore(&card->thread_mask_lock, flags);
0170     wake_up(&card->wait_q);
0171 }
0172 EXPORT_SYMBOL_GPL(qeth_set_allowed_threads);
0173
0174 int qeth_threads_running(struct qeth_card *card, unsigned long threads)
0175 {
0176     unsigned long flags;
0177     int rc = 0;
0178
0179     spin_lock_irqsave(&card->thread_mask_lock, flags);
0180     rc = (card->thread_running_mask & threads);
0181     spin_unlock_irqrestore(&card->thread_mask_lock, flags);
0182     return rc;
0183 }
0184 EXPORT_SYMBOL_GPL(qeth_threads_running);
0185
0186 static void qeth_clear_working_pool_list(struct qeth_card *card)
0187 {
0188     struct qeth_buffer_pool_entry *pool_entry, *tmp;
0189     struct qeth_qdio_q *queue = card->qdio.in_q;
0190     unsigned int i;
0191
0192     QETH_CARD_TEXT(card, 5, "clwrklst");
0193     list_for_each_entry_safe(pool_entry, tmp,
0194                  &card->qdio.in_buf_pool.entry_list, list)
0195         list_del(&pool_entry->list);
0196
0197     for (i = 0; i < ARRAY_SIZE(queue->bufs); i++)
0198         queue->bufs[i].pool_entry = NULL;
0199 }
0200
0201 static void qeth_free_pool_entry(struct qeth_buffer_pool_entry *entry)
0202 {
0203     unsigned int i;
0204
0205     for (i = 0; i < ARRAY_SIZE(entry->elements); i++) {
0206         if (entry->elements[i])
0207             __free_page(entry->elements[i]);
0208     }
0209
0210     kfree(entry);
0211 }
0212
0213 static void qeth_free_buffer_pool(struct qeth_card *card)
0214 {
0215     struct qeth_buffer_pool_entry *entry, *tmp;
0216
0217     list_for_each_entry_safe(entry, tmp, &card->qdio.init_pool.entry_list,
0218                  init_list) {
0219         list_del(&entry->init_list);
0220         qeth_free_pool_entry(entry);
0221     }
0222 }
0223
0224 static struct qeth_buffer_pool_entry *qeth_alloc_pool_entry(unsigned int pages)
0225 {
0226     struct qeth_buffer_pool_entry *entry;
0227     unsigned int i;
0228
0229     entry = kzalloc(sizeof(*entry), GFP_KERNEL);
0230     if (!entry)
0231         return NULL;
0232
0233     for (i = 0; i < pages; i++) {
0234         entry->elements[i] = __dev_alloc_page(GFP_KERNEL);
0235
0236         if (!entry->elements[i]) {
0237             qeth_free_pool_entry(entry);
0238             return NULL;
0239         }
0240     }
0241
0242     return entry;
0243 }
0244
0245 static int qeth_alloc_buffer_pool(struct qeth_card *card)
0246 {
0247     unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
0248     unsigned int i;
0249
0250     QETH_CARD_TEXT(card, 5, "alocpool");
0251     for (i = 0; i < card->qdio.init_pool.buf_count; ++i) {
0252         struct qeth_buffer_pool_entry *entry;
0253
0254         entry = qeth_alloc_pool_entry(buf_elements);
0255         if (!entry) {
0256             qeth_free_buffer_pool(card);
0257             return -ENOMEM;
0258         }
0259
0260         list_add(&entry->init_list, &card->qdio.init_pool.entry_list);
0261     }
0262     return 0;
0263 }
0264
0265 int qeth_resize_buffer_pool(struct qeth_card *card, unsigned int count)
0266 {
0267     unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
0268     struct qeth_qdio_buffer_pool *pool = &card->qdio.init_pool;
0269     struct qeth_buffer_pool_entry *entry, *tmp;
0270     int delta = count - pool->buf_count;
0271     LIST_HEAD(entries);
0272
0273     QETH_CARD_TEXT(card, 2, "realcbp");
0274
0275     /* Defer until pool is allocated: */
0276     if (list_empty(&pool->entry_list))
0277         goto out;
0278
0279     /* Remove entries from the pool: */
0280     while (delta < 0) {
0281         entry = list_first_entry(&pool->entry_list,
0282                      struct qeth_buffer_pool_entry,
0283                      init_list);
0284         list_del(&entry->init_list);
0285         qeth_free_pool_entry(entry);
0286
0287         delta++;
0288     }
0289
0290     /* Allocate additional entries: */
0291     while (delta > 0) {
0292         entry = qeth_alloc_pool_entry(buf_elements);
0293         if (!entry) {
0294             list_for_each_entry_safe(entry, tmp, &entries,
0295                          init_list) {
0296                 list_del(&entry->init_list);
0297                 qeth_free_pool_entry(entry);
0298             }
0299
0300             return -ENOMEM;
0301         }
0302
0303         list_add(&entry->init_list, &entries);
0304
0305         delta--;
0306     }
0307
0308     list_splice(&entries, &pool->entry_list);
0309
0310 out:
0311     card->qdio.in_buf_pool.buf_count = count;
0312     pool->buf_count = count;
0313     return 0;
0314 }
0315 EXPORT_SYMBOL_GPL(qeth_resize_buffer_pool);
0316
0317 static void qeth_free_qdio_queue(struct qeth_qdio_q *q)
0318 {
0319     if (!q)
0320         return;
0321
0322     qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
0323     kfree(q);
0324 }
0325
0326 static struct qeth_qdio_q *qeth_alloc_qdio_queue(void)
0327 {
0328     struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
0329     int i;
0330
0331     if (!q)
0332         return NULL;
0333
0334     if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
0335         kfree(q);
0336         return NULL;
0337     }
0338
0339     for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i)
0340         q->bufs[i].buffer = q->qdio_bufs[i];
0341
0342     QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *));
0343     return q;
0344 }
0345
0346 static int qeth_cq_init(struct qeth_card *card)
0347 {
0348     int rc;
0349
0350     if (card->options.cq == QETH_CQ_ENABLED) {
0351         QETH_CARD_TEXT(card, 2, "cqinit");
0352         qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
0353                    QDIO_MAX_BUFFERS_PER_Q);
0354         card->qdio.c_q->next_buf_to_init = 127;
0355
0356         rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), 1, 0, 127);
0357         if (rc) {
0358             QETH_CARD_TEXT_(card, 2, "1err%d", rc);
0359             goto out;
0360         }
0361     }
0362     rc = 0;
0363 out:
0364     return rc;
0365 }
0366
0367 static int qeth_alloc_cq(struct qeth_card *card)
0368 {
0369     if (card->options.cq == QETH_CQ_ENABLED) {
0370         QETH_CARD_TEXT(card, 2, "cqon");
0371         card->qdio.c_q = qeth_alloc_qdio_queue();
0372         if (!card->qdio.c_q) {
0373             dev_err(&card->gdev->dev, "Failed to create completion queue\n");
0374             return -ENOMEM;
0375         }
0376     } else {
0377         QETH_CARD_TEXT(card, 2, "nocq");
0378         card->qdio.c_q = NULL;
0379     }
0380     return 0;
0381 }
0382
0383 static void qeth_free_cq(struct qeth_card *card)
0384 {
0385     if (card->qdio.c_q) {
0386         qeth_free_qdio_queue(card->qdio.c_q);
0387         card->qdio.c_q = NULL;
0388     }
0389 }
0390
0391 static enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15,
0392                             int delayed)
0393 {
0394     enum iucv_tx_notify n;
0395
0396     switch (sbalf15) {
0397     case 0:
0398         n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK;
0399         break;
0400     case 4:
0401     case 16:
0402     case 17:
0403     case 18:
0404         n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE :
0405             TX_NOTIFY_UNREACHABLE;
0406         break;
0407     default:
0408         n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR :
0409             TX_NOTIFY_GENERALERROR;
0410         break;
0411     }
0412
0413     return n;
0414 }
0415
0416 static void qeth_put_cmd(struct qeth_cmd_buffer *iob)
0417 {
0418     if (refcount_dec_and_test(&iob->ref_count)) {
0419         kfree(iob->data);
0420         kfree(iob);
0421     }
0422 }
0423 static void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u8 flags, u32 len,
0424                void *data)
0425 {
0426     ccw->cmd_code = cmd_code;
0427     ccw->flags = flags | CCW_FLAG_SLI;
0428     ccw->count = len;
0429     ccw->cda = (__u32)virt_to_phys(data);
0430 }
0431
0432 static int __qeth_issue_next_read(struct qeth_card *card)
0433 {
0434     struct qeth_cmd_buffer *iob = card->read_cmd;
0435     struct qeth_channel *channel = iob->channel;
0436     struct ccw1 *ccw = __ccw_from_cmd(iob);
0437     int rc;
0438
0439     QETH_CARD_TEXT(card, 5, "issnxrd");
0440     if (channel->state != CH_STATE_UP)
0441         return -EIO;
0442
0443     memset(iob->data, 0, iob->length);
0444     qeth_setup_ccw(ccw, CCW_CMD_READ, 0, iob->length, iob->data);
0445     iob->callback = qeth_issue_next_read_cb;
0446     /* keep the cmd alive after completion: */
0447     qeth_get_cmd(iob);
0448
0449     QETH_CARD_TEXT(card, 6, "noirqpnd");
0450     rc = ccw_device_start(channel->ccwdev, ccw, (addr_t) iob, 0, 0);
0451     if (!rc) {
0452         channel->active_cmd = iob;
0453     } else {
0454         QETH_DBF_MESSAGE(2, "error %i on device %x when starting next read ccw!\n",
0455                  rc, CARD_DEVID(card));
0456         qeth_unlock_channel(card, channel);
0457         qeth_put_cmd(iob);
0458         card->read_or_write_problem = 1;
0459         qeth_schedule_recovery(card);
0460     }
0461     return rc;
0462 }
0463
0464 static int qeth_issue_next_read(struct qeth_card *card)
0465 {
0466     int ret;
0467
0468     spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
0469     ret = __qeth_issue_next_read(card);
0470     spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
0471
0472     return ret;
0473 }
0474
0475 static void qeth_enqueue_cmd(struct qeth_card *card,
0476                  struct qeth_cmd_buffer *iob)
0477 {
0478     spin_lock_irq(&card->lock);
0479     list_add_tail(&iob->list_entry, &card->cmd_waiter_list);
0480     spin_unlock_irq(&card->lock);
0481 }
0482
0483 static void qeth_dequeue_cmd(struct qeth_card *card,
0484                  struct qeth_cmd_buffer *iob)
0485 {
0486     spin_lock_irq(&card->lock);
0487     list_del(&iob->list_entry);
0488     spin_unlock_irq(&card->lock);
0489 }
0490
0491 static void qeth_notify_cmd(struct qeth_cmd_buffer *iob, int reason)
0492 {
0493     iob->rc = reason;
0494     complete(&iob->done);
0495 }
0496
0497 static void qeth_flush_local_addrs4(struct qeth_card *card)
0498 {
0499     struct qeth_local_addr *addr;
0500     struct hlist_node *tmp;
0501     unsigned int i;
0502
0503     spin_lock_irq(&card->local_addrs4_lock);
0504     hash_for_each_safe(card->local_addrs4, i, tmp, addr, hnode) {
0505         hash_del_rcu(&addr->hnode);
0506         kfree_rcu(addr, rcu);
0507     }
0508     spin_unlock_irq(&card->local_addrs4_lock);
0509 }
0510
0511 static void qeth_flush_local_addrs6(struct qeth_card *card)
0512 {
0513     struct qeth_local_addr *addr;
0514     struct hlist_node *tmp;
0515     unsigned int i;
0516
0517     spin_lock_irq(&card->local_addrs6_lock);
0518     hash_for_each_safe(card->local_addrs6, i, tmp, addr, hnode) {
0519         hash_del_rcu(&addr->hnode);
0520         kfree_rcu(addr, rcu);
0521     }
0522     spin_unlock_irq(&card->local_addrs6_lock);
0523 }
0524
0525 static void qeth_flush_local_addrs(struct qeth_card *card)
0526 {
0527     qeth_flush_local_addrs4(card);
0528     qeth_flush_local_addrs6(card);
0529 }
0530
0531 static void qeth_add_local_addrs4(struct qeth_card *card,
0532                   struct qeth_ipacmd_local_addrs4 *cmd)
0533 {
0534     unsigned int i;
0535
0536     if (cmd->addr_length !=
0537         sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
0538         dev_err_ratelimited(&card->gdev->dev,
0539                     "Dropped IPv4 ADD LOCAL ADDR event with bad length %u\n",
0540                     cmd->addr_length);
0541         return;
0542     }
0543
0544     spin_lock(&card->local_addrs4_lock);
0545     for (i = 0; i < cmd->count; i++) {
0546         unsigned int key = ipv4_addr_hash(cmd->addrs[i].addr);
0547         struct qeth_local_addr *addr;
0548         bool duplicate = false;
0549
0550         hash_for_each_possible(card->local_addrs4, addr, hnode, key) {
0551             if (addr->addr.s6_addr32[3] == cmd->addrs[i].addr) {
0552                 duplicate = true;
0553                 break;
0554             }
0555         }
0556
0557         if (duplicate)
0558             continue;
0559
0560         addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
0561         if (!addr) {
0562             dev_err(&card->gdev->dev,
0563                 "Failed to allocate local addr object. Traffic to %pI4 might suffer.\n",
0564                 &cmd->addrs[i].addr);
0565             continue;
0566         }
0567
0568         ipv6_addr_set(&addr->addr, 0, 0, 0, cmd->addrs[i].addr);
0569         hash_add_rcu(card->local_addrs4, &addr->hnode, key);
0570     }
0571     spin_unlock(&card->local_addrs4_lock);
0572 }
0573
0574 static void qeth_add_local_addrs6(struct qeth_card *card,
0575                   struct qeth_ipacmd_local_addrs6 *cmd)
0576 {
0577     unsigned int i;
0578
0579     if (cmd->addr_length !=
0580         sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
0581         dev_err_ratelimited(&card->gdev->dev,
0582                     "Dropped IPv6 ADD LOCAL ADDR event with bad length %u\n",
0583                     cmd->addr_length);
0584         return;
0585     }
0586
0587     spin_lock(&card->local_addrs6_lock);
0588     for (i = 0; i < cmd->count; i++) {
0589         u32 key = ipv6_addr_hash(&cmd->addrs[i].addr);
0590         struct qeth_local_addr *addr;
0591         bool duplicate = false;
0592
0593         hash_for_each_possible(card->local_addrs6, addr, hnode, key) {
0594             if (ipv6_addr_equal(&addr->addr, &cmd->addrs[i].addr)) {
0595                 duplicate = true;
0596                 break;
0597             }
0598         }
0599
0600         if (duplicate)
0601             continue;
0602
0603         addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
0604         if (!addr) {
0605             dev_err(&card->gdev->dev,
0606                 "Failed to allocate local addr object. Traffic to %pI6c might suffer.\n",
0607                 &cmd->addrs[i].addr);
0608             continue;
0609         }
0610
0611         addr->addr = cmd->addrs[i].addr;
0612         hash_add_rcu(card->local_addrs6, &addr->hnode, key);
0613     }
0614     spin_unlock(&card->local_addrs6_lock);
0615 }
0616
0617 static void qeth_del_local_addrs4(struct qeth_card *card,
0618                   struct qeth_ipacmd_local_addrs4 *cmd)
0619 {
0620     unsigned int i;
0621
0622     if (cmd->addr_length !=
0623         sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
0624         dev_err_ratelimited(&card->gdev->dev,
0625                     "Dropped IPv4 DEL LOCAL ADDR event with bad length %u\n",
0626                     cmd->addr_length);
0627         return;
0628     }
0629
0630     spin_lock(&card->local_addrs4_lock);
0631     for (i = 0; i < cmd->count; i++) {
0632         struct qeth_ipacmd_local_addr4 *addr = &cmd->addrs[i];
0633         unsigned int key = ipv4_addr_hash(addr->addr);
0634         struct qeth_local_addr *tmp;
0635
0636         hash_for_each_possible(card->local_addrs4, tmp, hnode, key) {
0637             if (tmp->addr.s6_addr32[3] == addr->addr) {
0638                 hash_del_rcu(&tmp->hnode);
0639                 kfree_rcu(tmp, rcu);
0640                 break;
0641             }
0642         }
0643     }
0644     spin_unlock(&card->local_addrs4_lock);
0645 }
0646
0647 static void qeth_del_local_addrs6(struct qeth_card *card,
0648                   struct qeth_ipacmd_local_addrs6 *cmd)
0649 {
0650     unsigned int i;
0651
0652     if (cmd->addr_length !=
0653         sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
0654         dev_err_ratelimited(&card->gdev->dev,
0655                     "Dropped IPv6 DEL LOCAL ADDR event with bad length %u\n",
0656                     cmd->addr_length);
0657         return;
0658     }
0659
0660     spin_lock(&card->local_addrs6_lock);
0661     for (i = 0; i < cmd->count; i++) {
0662         struct qeth_ipacmd_local_addr6 *addr = &cmd->addrs[i];
0663         u32 key = ipv6_addr_hash(&addr->addr);
0664         struct qeth_local_addr *tmp;
0665
0666         hash_for_each_possible(card->local_addrs6, tmp, hnode, key) {
0667             if (ipv6_addr_equal(&tmp->addr, &addr->addr)) {
0668                 hash_del_rcu(&tmp->hnode);
0669                 kfree_rcu(tmp, rcu);
0670                 break;
0671             }
0672         }
0673     }
0674     spin_unlock(&card->local_addrs6_lock);
0675 }
0676
0677 static bool qeth_next_hop_is_local_v4(struct qeth_card *card,
0678                       struct sk_buff *skb)
0679 {
0680     struct qeth_local_addr *tmp;
0681     bool is_local = false;
0682     unsigned int key;
0683     __be32 next_hop;
0684
0685     if (hash_empty(card->local_addrs4))
0686         return false;
0687
0688     rcu_read_lock();
0689     next_hop = qeth_next_hop_v4_rcu(skb,
0690                     qeth_dst_check_rcu(skb, htons(ETH_P_IP)));
0691     key = ipv4_addr_hash(next_hop);
0692
0693     hash_for_each_possible_rcu(card->local_addrs4, tmp, hnode, key) {
0694         if (tmp->addr.s6_addr32[3] == next_hop) {
0695             is_local = true;
0696             break;
0697         }
0698     }
0699     rcu_read_unlock();
0700
0701     return is_local;
0702 }
0703
0704 static bool qeth_next_hop_is_local_v6(struct qeth_card *card,
0705                       struct sk_buff *skb)
0706 {
0707     struct qeth_local_addr *tmp;
0708     struct in6_addr *next_hop;
0709     bool is_local = false;
0710     u32 key;
0711
0712     if (hash_empty(card->local_addrs6))
0713         return false;
0714
0715     rcu_read_lock();
0716     next_hop = qeth_next_hop_v6_rcu(skb,
0717                     qeth_dst_check_rcu(skb, htons(ETH_P_IPV6)));
0718     key = ipv6_addr_hash(next_hop);
0719
0720     hash_for_each_possible_rcu(card->local_addrs6, tmp, hnode, key) {
0721         if (ipv6_addr_equal(&tmp->addr, next_hop)) {
0722             is_local = true;
0723             break;
0724         }
0725     }
0726     rcu_read_unlock();
0727
0728     return is_local;
0729 }
0730
0731 static int qeth_debugfs_local_addr_show(struct seq_file *m, void *v)
0732 {
0733     struct qeth_card *card = m->private;
0734     struct qeth_local_addr *tmp;
0735     unsigned int i;
0736
0737     rcu_read_lock();
0738     hash_for_each_rcu(card->local_addrs4, i, tmp, hnode)
0739         seq_printf(m, "%pI4\n", &tmp->addr.s6_addr32[3]);
0740     hash_for_each_rcu(card->local_addrs6, i, tmp, hnode)
0741         seq_printf(m, "%pI6c\n", &tmp->addr);
0742     rcu_read_unlock();
0743
0744     return 0;
0745 }
0746
0747 DEFINE_SHOW_ATTRIBUTE(qeth_debugfs_local_addr);
0748
0749 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
0750         struct qeth_card *card)
0751 {
0752     const char *ipa_name;
0753     int com = cmd->hdr.command;
0754
0755     ipa_name = qeth_get_ipa_cmd_name(com);
0756
0757     if (rc)
0758         QETH_DBF_MESSAGE(2, "IPA: %s(%#x) for device %x returned %#x \"%s\"\n",
0759                  ipa_name, com, CARD_DEVID(card), rc,
0760                  qeth_get_ipa_msg(rc));
0761     else
0762         QETH_DBF_MESSAGE(5, "IPA: %s(%#x) for device %x succeeded\n",
0763                  ipa_name, com, CARD_DEVID(card));
0764 }
0765
0766 static void qeth_default_link_info(struct qeth_card *card)
0767 {
0768     struct qeth_link_info *link_info = &card->info.link_info;
0769
0770     QETH_CARD_TEXT(card, 2, "dftlinfo");
0771     link_info->duplex = DUPLEX_FULL;
0772
0773     if (IS_IQD(card) || IS_VM_NIC(card)) {
0774         link_info->speed = SPEED_10000;
0775         link_info->port = PORT_FIBRE;
0776         link_info->link_mode = QETH_LINK_MODE_FIBRE_SHORT;
0777     } else {
0778         switch (card->info.link_type) {
0779         case QETH_LINK_TYPE_FAST_ETH:
0780         case QETH_LINK_TYPE_LANE_ETH100:
0781             link_info->speed = SPEED_100;
0782             link_info->port = PORT_TP;
0783             break;
0784         case QETH_LINK_TYPE_GBIT_ETH:
0785         case QETH_LINK_TYPE_LANE_ETH1000:
0786             link_info->speed = SPEED_1000;
0787             link_info->port = PORT_FIBRE;
0788             break;
0789         case QETH_LINK_TYPE_10GBIT_ETH:
0790             link_info->speed = SPEED_10000;
0791             link_info->port = PORT_FIBRE;
0792             break;
0793         case QETH_LINK_TYPE_25GBIT_ETH:
0794             link_info->speed = SPEED_25000;
0795             link_info->port = PORT_FIBRE;
0796             break;
0797         default:
0798             dev_info(&card->gdev->dev,
0799                  "Unknown link type %x\n",
0800                  card->info.link_type);
0801             link_info->speed = SPEED_UNKNOWN;
0802             link_info->port = PORT_OTHER;
0803         }
0804
0805         link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
0806     }
0807 }
0808
0809 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
0810                         struct qeth_ipa_cmd *cmd)
0811 {
0812     QETH_CARD_TEXT(card, 5, "chkipad");
0813
0814     if (IS_IPA_REPLY(cmd)) {
0815         if (cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
0816             qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
0817         return cmd;
0818     }
0819
0820     /* handle unsolicited event: */
0821     switch (cmd->hdr.command) {
0822     case IPA_CMD_STOPLAN:
0823         if (cmd->hdr.return_code == IPA_RC_VEPA_TO_VEB_TRANSITION) {
0824             dev_err(&card->gdev->dev,
0825                 "Adjacent port of interface %s is no longer in reflective relay mode, trigger recovery\n",
0826                 netdev_name(card->dev));
0827             /* Set offline, then probably fail to set online: */
0828             qeth_schedule_recovery(card);
0829         } else {
0830             /* stay online for subsequent STARTLAN */
0831             dev_warn(&card->gdev->dev,
0832                  "The link for interface %s on CHPID 0x%X failed\n",
0833                  netdev_name(card->dev), card->info.chpid);
0834             qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
0835             netif_carrier_off(card->dev);
0836             qeth_default_link_info(card);
0837         }
0838         return NULL;
0839     case IPA_CMD_STARTLAN:
0840         dev_info(&card->gdev->dev,
0841              "The link for %s on CHPID 0x%X has been restored\n",
0842              netdev_name(card->dev), card->info.chpid);
0843         if (card->info.hwtrap)
0844             card->info.hwtrap = 2;
0845         qeth_schedule_recovery(card);
0846         return NULL;
0847     case IPA_CMD_SETBRIDGEPORT_IQD:
0848     case IPA_CMD_SETBRIDGEPORT_OSA:
0849     case IPA_CMD_ADDRESS_CHANGE_NOTIF:
0850         if (card->discipline->control_event_handler(card, cmd))
0851             return cmd;
0852         return NULL;
0853     case IPA_CMD_REGISTER_LOCAL_ADDR:
0854         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
0855             qeth_add_local_addrs4(card, &cmd->data.local_addrs4);
0856         else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
0857             qeth_add_local_addrs6(card, &cmd->data.local_addrs6);
0858
0859         QETH_CARD_TEXT(card, 3, "irla");
0860         return NULL;
0861     case IPA_CMD_UNREGISTER_LOCAL_ADDR:
0862         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
0863             qeth_del_local_addrs4(card, &cmd->data.local_addrs4);
0864         else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
0865             qeth_del_local_addrs6(card, &cmd->data.local_addrs6);
0866
0867         QETH_CARD_TEXT(card, 3, "urla");
0868         return NULL;
0869     default:
0870         QETH_DBF_MESSAGE(2, "Received data is IPA but not a reply!\n");
0871         return cmd;
0872     }
0873 }
0874
0875 static void qeth_clear_ipacmd_list(struct qeth_card *card)
0876 {
0877     struct qeth_cmd_buffer *iob;
0878     unsigned long flags;
0879
0880     QETH_CARD_TEXT(card, 4, "clipalst");
0881
0882     spin_lock_irqsave(&card->lock, flags);
0883     list_for_each_entry(iob, &card->cmd_waiter_list, list_entry)
0884         qeth_notify_cmd(iob, -ECANCELED);
0885     spin_unlock_irqrestore(&card->lock, flags);
0886 }
0887
0888 static int qeth_check_idx_response(struct qeth_card *card,
0889     unsigned char *buffer)
0890 {
0891     QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
0892     if ((buffer[2] & QETH_IDX_TERMINATE_MASK) == QETH_IDX_TERMINATE) {
0893         QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#04x\n",
0894                  buffer[4]);
0895         QETH_CARD_TEXT(card, 2, "ckidxres");
0896         QETH_CARD_TEXT(card, 2, " idxterm");
0897         QETH_CARD_TEXT_(card, 2, "rc%x", buffer[4]);
0898         if (buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT ||
0899             buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT_VM) {
0900             dev_err(&card->gdev->dev,
0901                 "The device does not support the configured transport mode\n");
0902             return -EPROTONOSUPPORT;
0903         }
0904         return -EIO;
0905     }
0906     return 0;
0907 }
0908
0909 static void qeth_release_buffer_cb(struct qeth_card *card,
0910                    struct qeth_cmd_buffer *iob,
0911                    unsigned int data_length)
0912 {
0913     qeth_put_cmd(iob);
0914 }
0915
0916 static void qeth_cancel_cmd(struct qeth_cmd_buffer *iob, int rc)
0917 {
0918     qeth_notify_cmd(iob, rc);
0919     qeth_put_cmd(iob);
0920 }
0921
0922 static struct qeth_cmd_buffer *qeth_alloc_cmd(struct qeth_channel *channel,
0923                           unsigned int length,
0924                           unsigned int ccws, long timeout)
0925 {
0926     struct qeth_cmd_buffer *iob;
0927
0928     if (length > QETH_BUFSIZE)
0929         return NULL;
0930
0931     iob = kzalloc(sizeof(*iob), GFP_KERNEL);
0932     if (!iob)
0933         return NULL;
0934
0935     iob->data = kzalloc(ALIGN(length, 8) + ccws * sizeof(struct ccw1),
0936                 GFP_KERNEL | GFP_DMA);
0937     if (!iob->data) {
0938         kfree(iob);
0939         return NULL;
0940     }
0941
0942     init_completion(&iob->done);
0943     spin_lock_init(&iob->lock);
0944     refcount_set(&iob->ref_count, 1);
0945     iob->channel = channel;
0946     iob->timeout = timeout;
0947     iob->length = length;
0948     return iob;
0949 }
0950
0951 static void qeth_issue_next_read_cb(struct qeth_card *card,
0952                     struct qeth_cmd_buffer *iob,
0953                     unsigned int data_length)
0954 {
0955     struct qeth_cmd_buffer *request = NULL;
0956     struct qeth_ipa_cmd *cmd = NULL;
0957     struct qeth_reply *reply = NULL;
0958     struct qeth_cmd_buffer *tmp;
0959     unsigned long flags;
0960     int rc = 0;
0961
0962     QETH_CARD_TEXT(card, 4, "sndctlcb");
0963     rc = qeth_check_idx_response(card, iob->data);
0964     switch (rc) {
0965     case 0:
0966         break;
0967     case -EIO:
0968         qeth_schedule_recovery(card);
0969         fallthrough;
0970     default:
0971         qeth_clear_ipacmd_list(card);
0972         goto err_idx;
0973     }
0974
0975     cmd = __ipa_reply(iob);
0976     if (cmd) {
0977         cmd = qeth_check_ipa_data(card, cmd);
0978         if (!cmd)
0979             goto out;
0980     }
0981
0982     /* match against pending cmd requests */
0983     spin_lock_irqsave(&card->lock, flags);
0984     list_for_each_entry(tmp, &card->cmd_waiter_list, list_entry) {
0985         if (tmp->match && tmp->match(tmp, iob)) {
0986             request = tmp;
0987             /* take the object outside the lock */
0988             qeth_get_cmd(request);
0989             break;
0990         }
0991     }
0992     spin_unlock_irqrestore(&card->lock, flags);
0993
0994     if (!request)
0995         goto out;
0996
0997     reply = &request->reply;
0998     if (!reply->callback) {
0999         rc = 0;
1000         goto no_callback;
1001     }
1002
1003     spin_lock_irqsave(&request->lock, flags);
1004     if (request->rc)
1005         /* Bail out when the requestor has already left: */
1006         rc = request->rc;
1007     else
1008         rc = reply->callback(card, reply, cmd ? (unsigned long)cmd :
1009                             (unsigned long)iob);
1010     spin_unlock_irqrestore(&request->lock, flags);
1011
1012 no_callback:
1013     if (rc <= 0)
1014         qeth_notify_cmd(request, rc);
1015     qeth_put_cmd(request);
1016 out:
1017     memcpy(&card->seqno.pdu_hdr_ack,
1018         QETH_PDU_HEADER_SEQ_NO(iob->data),
1019         QETH_SEQ_NO_LENGTH);
1020     __qeth_issue_next_read(card);
1021 err_idx:
1022     qeth_put_cmd(iob);
1023 }
1024
1025 static int qeth_set_thread_start_bit(struct qeth_card *card,
1026         unsigned long thread)
1027 {
1028     unsigned long flags;
1029     int rc = 0;
1030
1031     spin_lock_irqsave(&card->thread_mask_lock, flags);
1032     if (!(card->thread_allowed_mask & thread))
1033         rc = -EPERM;
1034     else if (card->thread_start_mask & thread)
1035         rc = -EBUSY;
1036     else
1037         card->thread_start_mask |= thread;
1038     spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1039
1040     return rc;
1041 }
1042
1043 static void qeth_clear_thread_start_bit(struct qeth_card *card,
1044                     unsigned long thread)
1045 {
1046     unsigned long flags;
1047
1048     spin_lock_irqsave(&card->thread_mask_lock, flags);
1049     card->thread_start_mask &= ~thread;
1050     spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1051     wake_up(&card->wait_q);
1052 }
1053
1054 static void qeth_clear_thread_running_bit(struct qeth_card *card,
1055                       unsigned long thread)
1056 {
1057     unsigned long flags;
1058
1059     spin_lock_irqsave(&card->thread_mask_lock, flags);
1060     card->thread_running_mask &= ~thread;
1061     spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1062     wake_up_all(&card->wait_q);
1063 }
1064
1065 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1066 {
1067     unsigned long flags;
1068     int rc = 0;
1069
1070     spin_lock_irqsave(&card->thread_mask_lock, flags);
1071     if (card->thread_start_mask & thread) {
1072         if ((card->thread_allowed_mask & thread) &&
1073             !(card->thread_running_mask & thread)) {
1074             rc = 1;
1075             card->thread_start_mask &= ~thread;
1076             card->thread_running_mask |= thread;
1077         } else
1078             rc = -EPERM;
1079     }
1080     spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1081     return rc;
1082 }
1083
1084 static int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1085 {
1086     int rc = 0;
1087
1088     wait_event(card->wait_q,
1089            (rc = __qeth_do_run_thread(card, thread)) >= 0);
1090     return rc;
1091 }
1092
1093 int qeth_schedule_recovery(struct qeth_card *card)
1094 {
1095     int rc;
1096
1097     QETH_CARD_TEXT(card, 2, "startrec");
1098
1099     rc = qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD);
1100     if (!rc)
1101         schedule_work(&card->kernel_thread_starter);
1102
1103     return rc;
1104 }
1105
1106 static int qeth_get_problem(struct qeth_card *card, struct ccw_device *cdev,
1107                 struct irb *irb)
1108 {
1109     int dstat, cstat;
1110     char *sense;
1111
1112     sense = (char *) irb->ecw;
1113     cstat = irb->scsw.cmd.cstat;
1114     dstat = irb->scsw.cmd.dstat;
1115
1116     if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
1117              SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
1118              SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
1119         QETH_CARD_TEXT(card, 2, "CGENCHK");
1120         dev_warn(&cdev->dev, "The qeth device driver "
1121             "failed to recover an error on the device\n");
1122         QETH_DBF_MESSAGE(2, "check on channel %x with dstat=%#x, cstat=%#x\n",
1123                  CCW_DEVID(cdev), dstat, cstat);
1124         print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
1125                 16, 1, irb, 64, 1);
1126         return -EIO;
1127     }
1128
1129     if (dstat & DEV_STAT_UNIT_CHECK) {
1130         if (sense[SENSE_RESETTING_EVENT_BYTE] &
1131             SENSE_RESETTING_EVENT_FLAG) {
1132             QETH_CARD_TEXT(card, 2, "REVIND");
1133             return -EIO;
1134         }
1135         if (sense[SENSE_COMMAND_REJECT_BYTE] &
1136             SENSE_COMMAND_REJECT_FLAG) {
1137             QETH_CARD_TEXT(card, 2, "CMDREJi");
1138             return -EIO;
1139         }
1140         if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
1141             QETH_CARD_TEXT(card, 2, "AFFE");
1142             return -EIO;
1143         }
1144         if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
1145             QETH_CARD_TEXT(card, 2, "ZEROSEN");
1146             return 0;
1147         }
1148         QETH_CARD_TEXT(card, 2, "DGENCHK");
1149         return -EIO;
1150     }
1151     return 0;
1152 }
1153
1154 static int qeth_check_irb_error(struct qeth_card *card, struct ccw_device *cdev,
1155                 struct irb *irb)
1156 {
1157     if (!IS_ERR(irb))
1158         return 0;
1159
1160     switch (PTR_ERR(irb)) {
1161     case -EIO:
1162         QETH_DBF_MESSAGE(2, "i/o-error on channel %x\n",
1163                  CCW_DEVID(cdev));
1164         QETH_CARD_TEXT(card, 2, "ckirberr");
1165         QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
1166         return -EIO;
1167     case -ETIMEDOUT:
1168         dev_warn(&cdev->dev, "A hardware operation timed out"
1169             " on the device\n");
1170         QETH_CARD_TEXT(card, 2, "ckirberr");
1171         QETH_CARD_TEXT_(card, 2, "  rc%d", -ETIMEDOUT);
1172         return -ETIMEDOUT;
1173     default:
1174         QETH_DBF_MESSAGE(2, "unknown error %ld on channel %x\n",
1175                  PTR_ERR(irb), CCW_DEVID(cdev));
1176         QETH_CARD_TEXT(card, 2, "ckirberr");
1177         QETH_CARD_TEXT(card, 2, "  rc???");
1178         return PTR_ERR(irb);
1179     }
1180 }
1181
1182 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
1183         struct irb *irb)
1184 {
1185     int rc;
1186     int cstat, dstat;
1187     struct qeth_cmd_buffer *iob = NULL;
1188     struct ccwgroup_device *gdev;
1189     struct qeth_channel *channel;
1190     struct qeth_card *card;
1191
1192     /* while we hold the ccwdev lock, this stays valid: */
1193     gdev = dev_get_drvdata(&cdev->dev);
1194     card = dev_get_drvdata(&gdev->dev);
1195
1196     QETH_CARD_TEXT(card, 5, "irq");
1197
1198     if (card->read.ccwdev == cdev) {
1199         channel = &card->read;
1200         QETH_CARD_TEXT(card, 5, "read");
1201     } else if (card->write.ccwdev == cdev) {
1202         channel = &card->write;
1203         QETH_CARD_TEXT(card, 5, "write");
1204     } else {
1205         channel = &card->data;
1206         QETH_CARD_TEXT(card, 5, "data");
1207     }
1208
1209     if (intparm == 0) {
1210         QETH_CARD_TEXT(card, 5, "irqunsol");
1211     } else if ((addr_t)intparm != (addr_t)channel->active_cmd) {
1212         QETH_CARD_TEXT(card, 5, "irqunexp");
1213
1214         dev_err(&cdev->dev,
1215             "Received IRQ with intparm %lx, expected %px\n",
1216             intparm, channel->active_cmd);
1217         if (channel->active_cmd)
1218             qeth_cancel_cmd(channel->active_cmd, -EIO);
1219     } else {
1220         iob = (struct qeth_cmd_buffer *) (addr_t)intparm;
1221     }
1222
1223     qeth_unlock_channel(card, channel);
1224
1225     rc = qeth_check_irb_error(card, cdev, irb);
1226     if (rc) {
1227         /* IO was terminated, free its resources. */
1228         if (iob)
1229             qeth_cancel_cmd(iob, rc);
1230         return;
1231     }
1232
1233     if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC) {
1234         channel->state = CH_STATE_STOPPED;
1235         wake_up(&card->wait_q);
1236     }
1237
1238     if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) {
1239         channel->state = CH_STATE_HALTED;
1240         wake_up(&card->wait_q);
1241     }
1242
1243     if (iob && (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC |
1244                       SCSW_FCTL_HALT_FUNC))) {
1245         qeth_cancel_cmd(iob, -ECANCELED);
1246         iob = NULL;
1247     }
1248
1249     cstat = irb->scsw.cmd.cstat;
1250     dstat = irb->scsw.cmd.dstat;
1251
1252     if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1253         (dstat & DEV_STAT_UNIT_CHECK) ||
1254         (cstat)) {
1255         if (irb->esw.esw0.erw.cons) {
1256             dev_warn(&channel->ccwdev->dev,
1257                 "The qeth device driver failed to recover "
1258                 "an error on the device\n");
1259             QETH_DBF_MESSAGE(2, "sense data available on channel %x: cstat %#X dstat %#X\n",
1260                      CCW_DEVID(channel->ccwdev), cstat,
1261                      dstat);
1262             print_hex_dump(KERN_WARNING, "qeth: irb ",
1263                 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1264             print_hex_dump(KERN_WARNING, "qeth: sense data ",
1265                 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1266         }
1267
1268         rc = qeth_get_problem(card, cdev, irb);
1269         if (rc) {
1270             card->read_or_write_problem = 1;
1271             if (iob)
1272                 qeth_cancel_cmd(iob, rc);
1273             qeth_clear_ipacmd_list(card);
1274             qeth_schedule_recovery(card);
1275             return;
1276         }
1277     }
1278
1279     if (iob) {
1280         /* sanity check: */
1281         if (irb->scsw.cmd.count > iob->length) {
1282             qeth_cancel_cmd(iob, -EIO);
1283             return;
1284         }
1285         if (iob->callback)
1286             iob->callback(card, iob,
1287                       iob->length - irb->scsw.cmd.count);
1288     }
1289 }
1290
1291 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1292         struct qeth_qdio_out_buffer *buf,
1293         enum iucv_tx_notify notification)
1294 {
1295     struct sk_buff *skb;
1296
1297     skb_queue_walk(&buf->skb_list, skb) {
1298         struct sock *sk = skb->sk;
1299
1300         QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1301         QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1302         if (sk && sk->sk_family == PF_IUCV)
1303             iucv_sk(sk)->sk_txnotify(sk, notification);
1304     }
1305 }
1306
1307 static void qeth_tx_complete_buf(struct qeth_qdio_out_q *queue,
1308                  struct qeth_qdio_out_buffer *buf, bool error,
1309                  int budget)
1310 {
1311     struct sk_buff *skb;
1312
1313     /* Empty buffer? */
1314     if (buf->next_element_to_fill == 0)
1315         return;
1316
1317     QETH_TXQ_STAT_INC(queue, bufs);
1318     QETH_TXQ_STAT_ADD(queue, buf_elements, buf->next_element_to_fill);
1319     if (error) {
1320         QETH_TXQ_STAT_ADD(queue, tx_errors, buf->frames);
1321     } else {
1322         QETH_TXQ_STAT_ADD(queue, tx_packets, buf->frames);
1323         QETH_TXQ_STAT_ADD(queue, tx_bytes, buf->bytes);
1324     }
1325
1326     while ((skb = __skb_dequeue(&buf->skb_list)) != NULL) {
1327         unsigned int bytes = qdisc_pkt_len(skb);
1328         bool is_tso = skb_is_gso(skb);
1329         unsigned int packets;
1330
1331         packets = is_tso ? skb_shinfo(skb)->gso_segs : 1;
1332         if (!error) {
1333             if (skb->ip_summed == CHECKSUM_PARTIAL)
1334                 QETH_TXQ_STAT_ADD(queue, skbs_csum, packets);
1335             if (skb_is_nonlinear(skb))
1336                 QETH_TXQ_STAT_INC(queue, skbs_sg);
1337             if (is_tso) {
1338                 QETH_TXQ_STAT_INC(queue, skbs_tso);
1339                 QETH_TXQ_STAT_ADD(queue, tso_bytes, bytes);
1340             }
1341         }
1342
1343         napi_consume_skb(skb, budget);
1344     }
1345 }
1346
1347 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1348                      struct qeth_qdio_out_buffer *buf,
1349                      bool error, int budget)
1350 {
1351     int i;
1352
1353     /* is PCI flag set on buffer? */
1354     if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ) {
1355         atomic_dec(&queue->set_pci_flags_count);
1356         QETH_TXQ_STAT_INC(queue, completion_irq);
1357     }
1358
1359     qeth_tx_complete_buf(queue, buf, error, budget);
1360
1361     for (i = 0; i < queue->max_elements; ++i) {
1362         void *data = phys_to_virt(buf->buffer->element[i].addr);
1363
1364         if (__test_and_clear_bit(i, buf->from_kmem_cache) && data)
1365             kmem_cache_free(qeth_core_header_cache, data);
1366     }
1367
1368     qeth_scrub_qdio_buffer(buf->buffer, queue->max_elements);
1369     buf->next_element_to_fill = 0;
1370     buf->frames = 0;
1371     buf->bytes = 0;
1372     atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
1373 }
1374
1375 static void qeth_free_out_buf(struct qeth_qdio_out_buffer *buf)
1376 {
1377     if (buf->aob)
1378         kmem_cache_free(qeth_qaob_cache, buf->aob);
1379     kmem_cache_free(qeth_qdio_outbuf_cache, buf);
1380 }
1381
1382 static void qeth_tx_complete_pending_bufs(struct qeth_card *card,
1383                       struct qeth_qdio_out_q *queue,
1384                       bool drain, int budget)
1385 {
1386     struct qeth_qdio_out_buffer *buf, *tmp;
1387
1388     list_for_each_entry_safe(buf, tmp, &queue->pending_bufs, list_entry) {
1389         struct qeth_qaob_priv1 *priv;
1390         struct qaob *aob = buf->aob;
1391         enum iucv_tx_notify notify;
1392         unsigned int i;
1393
1394         priv = (struct qeth_qaob_priv1 *)&aob->user1;
1395         if (drain || READ_ONCE(priv->state) == QETH_QAOB_DONE) {
1396             QETH_CARD_TEXT(card, 5, "fp");
1397             QETH_CARD_TEXT_(card, 5, "%lx", (long) buf);
1398
1399             notify = drain ? TX_NOTIFY_GENERALERROR :
1400                      qeth_compute_cq_notification(aob->aorc, 1);
1401             qeth_notify_skbs(queue, buf, notify);
1402             qeth_tx_complete_buf(queue, buf, drain, budget);
1403
1404             for (i = 0;
1405                  i < aob->sb_count && i < queue->max_elements;
1406                  i++) {
1407                 void *data = phys_to_virt(aob->sba[i]);
1408
1409                 if (test_bit(i, buf->from_kmem_cache) && data)
1410                     kmem_cache_free(qeth_core_header_cache,
1411                             data);
1412             }
1413
1414             list_del(&buf->list_entry);
1415             qeth_free_out_buf(buf);
1416         }
1417     }
1418 }
1419
1420 static void qeth_drain_output_queue(struct qeth_qdio_out_q *q, bool free)
1421 {
1422     int j;
1423
1424     qeth_tx_complete_pending_bufs(q->card, q, true, 0);
1425
1426     for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1427         if (!q->bufs[j])
1428             continue;
1429
1430         qeth_clear_output_buffer(q, q->bufs[j], true, 0);
1431         if (free) {
1432             qeth_free_out_buf(q->bufs[j]);
1433             q->bufs[j] = NULL;
1434         }
1435     }
1436 }
1437
1438 static void qeth_drain_output_queues(struct qeth_card *card)
1439 {
1440     int i;
1441
1442     QETH_CARD_TEXT(card, 2, "clearqdbf");
1443     /* clear outbound buffers to free skbs */
1444     for (i = 0; i < card->qdio.no_out_queues; ++i) {
1445         if (card->qdio.out_qs[i])
1446             qeth_drain_output_queue(card->qdio.out_qs[i], false);
1447     }
1448 }
1449
1450 static void qeth_osa_set_output_queues(struct qeth_card *card, bool single)
1451 {
1452     unsigned int max = single ? 1 : card->dev->num_tx_queues;
1453
1454     if (card->qdio.no_out_queues == max)
1455         return;
1456
1457     if (atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED)
1458         qeth_free_qdio_queues(card);
1459
1460     if (max == 1 && card->qdio.do_prio_queueing != QETH_PRIOQ_DEFAULT)
1461         dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1462
1463     card->qdio.no_out_queues = max;
1464 }
1465
1466 static int qeth_update_from_chp_desc(struct qeth_card *card)
1467 {
1468     struct ccw_device *ccwdev;
1469     struct channel_path_desc_fmt0 *chp_dsc;
1470
1471     QETH_CARD_TEXT(card, 2, "chp_desc");
1472
1473     ccwdev = card->data.ccwdev;
1474     chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1475     if (!chp_dsc)
1476         return -ENOMEM;
1477
1478     card->info.func_level = 0x4100 + chp_dsc->desc;
1479
1480     if (IS_OSD(card) || IS_OSX(card))
1481         /* CHPP field bit 6 == 1 -> single queue */
1482         qeth_osa_set_output_queues(card, chp_dsc->chpp & 0x02);
1483
1484     kfree(chp_dsc);
1485     QETH_CARD_TEXT_(card, 2, "nr:%x", card->qdio.no_out_queues);
1486     QETH_CARD_TEXT_(card, 2, "lvl:%02x", card->info.func_level);
1487     return 0;
1488 }
1489
1490 static void qeth_init_qdio_info(struct qeth_card *card)
1491 {
1492     QETH_CARD_TEXT(card, 4, "intqdinf");
1493     atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1494     card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1495     card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1496
1497     /* inbound */
1498     card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1499     if (IS_IQD(card))
1500         card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1501     else
1502         card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1503     card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1504     INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1505     INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1506 }
1507
1508 static void qeth_set_initial_options(struct qeth_card *card)
1509 {
1510     card->options.route4.type = NO_ROUTER;
1511     card->options.route6.type = NO_ROUTER;
1512     card->options.isolation = ISOLATION_MODE_NONE;
1513     card->options.cq = QETH_CQ_DISABLED;
1514     card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
1515 }
1516
1517 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1518 {
1519     unsigned long flags;
1520     int rc = 0;
1521
1522     spin_lock_irqsave(&card->thread_mask_lock, flags);
1523     QETH_CARD_TEXT_(card, 4, "  %02x%02x%02x",
1524             (u8) card->thread_start_mask,
1525             (u8) card->thread_allowed_mask,
1526             (u8) card->thread_running_mask);
1527     rc = (card->thread_start_mask & thread);
1528     spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1529     return rc;
1530 }
1531
1532 static int qeth_do_reset(void *data);
1533 static void qeth_start_kernel_thread(struct work_struct *work)
1534 {
1535     struct task_struct *ts;
1536     struct qeth_card *card = container_of(work, struct qeth_card,
1537                     kernel_thread_starter);
1538     QETH_CARD_TEXT(card, 2, "strthrd");
1539
1540     if (card->read.state != CH_STATE_UP &&
1541         card->write.state != CH_STATE_UP)
1542         return;
1543     if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1544         ts = kthread_run(qeth_do_reset, card, "qeth_recover");
1545         if (IS_ERR(ts)) {
1546             qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1547             qeth_clear_thread_running_bit(card,
1548                 QETH_RECOVER_THREAD);
1549         }
1550     }
1551 }
1552
1553 static void qeth_buffer_reclaim_work(struct work_struct *);
1554 static void qeth_setup_card(struct qeth_card *card)
1555 {
1556     QETH_CARD_TEXT(card, 2, "setupcrd");
1557
1558     card->info.type = CARD_RDEV(card)->id.driver_info;
1559     card->state = CARD_STATE_DOWN;
1560     spin_lock_init(&card->lock);
1561     spin_lock_init(&card->thread_mask_lock);
1562     mutex_init(&card->conf_mutex);
1563     mutex_init(&card->discipline_mutex);
1564     INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1565     INIT_LIST_HEAD(&card->cmd_waiter_list);
1566     init_waitqueue_head(&card->wait_q);
1567     qeth_set_initial_options(card);
1568     /* IP address takeover */
1569     INIT_LIST_HEAD(&card->ipato.entries);
1570     qeth_init_qdio_info(card);
1571     INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1572     hash_init(card->rx_mode_addrs);
1573     hash_init(card->local_addrs4);
1574     hash_init(card->local_addrs6);
1575     spin_lock_init(&card->local_addrs4_lock);
1576     spin_lock_init(&card->local_addrs6_lock);
1577 }
1578
1579 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1580 {
1581     struct qeth_card *card = container_of(slr, struct qeth_card,
1582                     qeth_service_level);
1583     if (card->info.mcl_level[0])
1584         seq_printf(m, "qeth: %s firmware level %s\n",
1585             CARD_BUS_ID(card), card->info.mcl_level);
1586 }
1587
1588 static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev)
1589 {
1590     struct qeth_card *card;
1591
1592     QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1593     card = kzalloc(sizeof(*card), GFP_KERNEL);
1594     if (!card)
1595         goto out;
1596     QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1597
1598     card->gdev = gdev;
1599     dev_set_drvdata(&gdev->dev, card);
1600     CARD_RDEV(card) = gdev->cdev[0];
1601     CARD_WDEV(card) = gdev->cdev[1];
1602     CARD_DDEV(card) = gdev->cdev[2];
1603
1604     card->event_wq = alloc_ordered_workqueue("%s_event", 0,
1605                          dev_name(&gdev->dev));
1606     if (!card->event_wq)
1607         goto out_wq;
1608
1609     card->read_cmd = qeth_alloc_cmd(&card->read, QETH_BUFSIZE, 1, 0);
1610     if (!card->read_cmd)
1611         goto out_read_cmd;
1612
1613     card->debugfs = debugfs_create_dir(dev_name(&gdev->dev),
1614                        qeth_debugfs_root);
1615     debugfs_create_file("local_addrs", 0400, card->debugfs, card,
1616                 &qeth_debugfs_local_addr_fops);
1617
1618     card->qeth_service_level.seq_print = qeth_core_sl_print;
1619     register_service_level(&card->qeth_service_level);
1620     return card;
1621
1622 out_read_cmd:
1623     destroy_workqueue(card->event_wq);
1624 out_wq:
1625     dev_set_drvdata(&gdev->dev, NULL);
1626     kfree(card);
1627 out:
1628     return NULL;
1629 }
1630
1631 static int qeth_clear_channel(struct qeth_card *card,
1632                   struct qeth_channel *channel)
1633 {
1634     int rc;
1635
1636     QETH_CARD_TEXT(card, 3, "clearch");
1637     spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1638     rc = ccw_device_clear(channel->ccwdev, (addr_t)channel->active_cmd);
1639     spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1640
1641     if (rc)
1642         return rc;
1643     rc = wait_event_interruptible_timeout(card->wait_q,
1644             channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1645     if (rc == -ERESTARTSYS)
1646         return rc;
1647     if (channel->state != CH_STATE_STOPPED)
1648         return -ETIME;
1649     channel->state = CH_STATE_DOWN;
1650     return 0;
1651 }
1652
1653 static int qeth_halt_channel(struct qeth_card *card,
1654                  struct qeth_channel *channel)
1655 {
1656     int rc;
1657
1658     QETH_CARD_TEXT(card, 3, "haltch");
1659     spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1660     rc = ccw_device_halt(channel->ccwdev, (addr_t)channel->active_cmd);
1661     spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1662
1663     if (rc)
1664         return rc;
1665     rc = wait_event_interruptible_timeout(card->wait_q,
1666             channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1667     if (rc == -ERESTARTSYS)
1668         return rc;
1669     if (channel->state != CH_STATE_HALTED)
1670         return -ETIME;
1671     return 0;
1672 }
1673
1674 static int qeth_stop_channel(struct qeth_channel *channel)
1675 {
1676     struct ccw_device *cdev = channel->ccwdev;
1677     int rc;
1678
1679     rc = ccw_device_set_offline(cdev);
1680
1681     spin_lock_irq(get_ccwdev_lock(cdev));
1682     if (channel->active_cmd)
1683         dev_err(&cdev->dev, "Stopped channel while cmd %px was still active\n",
1684             channel->active_cmd);
1685
1686     cdev->handler = NULL;
1687     spin_unlock_irq(get_ccwdev_lock(cdev));
1688
1689     return rc;
1690 }
1691
1692 static int qeth_start_channel(struct qeth_channel *channel)
1693 {
1694     struct ccw_device *cdev = channel->ccwdev;
1695     int rc;
1696
1697     channel->state = CH_STATE_DOWN;
1698     xchg(&channel->active_cmd, NULL);
1699
1700     spin_lock_irq(get_ccwdev_lock(cdev));
1701     cdev->handler = qeth_irq;
1702     spin_unlock_irq(get_ccwdev_lock(cdev));
1703
1704     rc = ccw_device_set_online(cdev);
1705     if (rc)
1706         goto err;
1707
1708     return 0;
1709
1710 err:
1711     spin_lock_irq(get_ccwdev_lock(cdev));
1712     cdev->handler = NULL;
1713     spin_unlock_irq(get_ccwdev_lock(cdev));
1714     return rc;
1715 }
1716
1717 static int qeth_halt_channels(struct qeth_card *card)
1718 {
1719     int rc1 = 0, rc2 = 0, rc3 = 0;
1720
1721     QETH_CARD_TEXT(card, 3, "haltchs");
1722     rc1 = qeth_halt_channel(card, &card->read);
1723     rc2 = qeth_halt_channel(card, &card->write);
1724     rc3 = qeth_halt_channel(card, &card->data);
1725     if (rc1)
1726         return rc1;
1727     if (rc2)
1728         return rc2;
1729     return rc3;
1730 }
1731
1732 static int qeth_clear_channels(struct qeth_card *card)
1733 {
1734     int rc1 = 0, rc2 = 0, rc3 = 0;
1735
1736     QETH_CARD_TEXT(card, 3, "clearchs");
1737     rc1 = qeth_clear_channel(card, &card->read);
1738     rc2 = qeth_clear_channel(card, &card->write);
1739     rc3 = qeth_clear_channel(card, &card->data);
1740     if (rc1)
1741         return rc1;
1742     if (rc2)
1743         return rc2;
1744     return rc3;
1745 }
1746
1747 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1748 {
1749     int rc = 0;
1750
1751     QETH_CARD_TEXT(card, 3, "clhacrd");
1752
1753     if (halt)
1754         rc = qeth_halt_channels(card);
1755     if (rc)
1756         return rc;
1757     return qeth_clear_channels(card);
1758 }
1759
1760 static int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1761 {
1762     int rc = 0;
1763
1764     QETH_CARD_TEXT(card, 3, "qdioclr");
1765     switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1766         QETH_QDIO_CLEANING)) {
1767     case QETH_QDIO_ESTABLISHED:
1768         if (IS_IQD(card))
1769             rc = qdio_shutdown(CARD_DDEV(card),
1770                 QDIO_FLAG_CLEANUP_USING_HALT);
1771         else
1772             rc = qdio_shutdown(CARD_DDEV(card),
1773                 QDIO_FLAG_CLEANUP_USING_CLEAR);
1774         if (rc)
1775             QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1776         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1777         break;
1778     case QETH_QDIO_CLEANING:
1779         return rc;
1780     default:
1781         break;
1782     }
1783     rc = qeth_clear_halt_card(card, use_halt);
1784     if (rc)
1785         QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1786     return rc;
1787 }
1788
1789 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
1790 {
1791     enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1792     struct diag26c_vnic_resp *response = NULL;
1793     struct diag26c_vnic_req *request = NULL;
1794     struct ccw_dev_id id;
1795     char userid[80];
1796     int rc = 0;
1797
1798     QETH_CARD_TEXT(card, 2, "vmlayer");
1799
1800     cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
1801     if (rc)
1802         goto out;
1803
1804     request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
1805     response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
1806     if (!request || !response) {
1807         rc = -ENOMEM;
1808         goto out;
1809     }
1810
1811     ccw_device_get_id(CARD_RDEV(card), &id);
1812     request->resp_buf_len = sizeof(*response);
1813     request->resp_version = DIAG26C_VERSION6_VM65918;
1814     request->req_format = DIAG26C_VNIC_INFO;
1815     ASCEBC(userid, 8);
1816     memcpy(&request->sys_name, userid, 8);
1817     request->devno = id.devno;
1818
1819     QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1820     rc = diag26c(request, response, DIAG26C_PORT_VNIC);
1821     QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1822     if (rc)
1823         goto out;
1824     QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
1825
1826     if (request->resp_buf_len < sizeof(*response) ||
1827         response->version != request->resp_version) {
1828         rc = -EIO;
1829         goto out;
1830     }
1831
1832     if (response->protocol == VNIC_INFO_PROT_L2)
1833         disc = QETH_DISCIPLINE_LAYER2;
1834     else if (response->protocol == VNIC_INFO_PROT_L3)
1835         disc = QETH_DISCIPLINE_LAYER3;
1836
1837 out:
1838     kfree(response);
1839     kfree(request);
1840     if (rc)
1841         QETH_CARD_TEXT_(card, 2, "err%x", rc);
1842     return disc;
1843 }
1844
1845 /* Determine whether the device requires a specific layer discipline */
1846 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1847 {
1848     enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1849
1850     if (IS_OSM(card))
1851         disc = QETH_DISCIPLINE_LAYER2;
1852     else if (IS_VM_NIC(card))
1853         disc = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
1854                       qeth_vm_detect_layer(card);
1855
1856     switch (disc) {
1857     case QETH_DISCIPLINE_LAYER2:
1858         QETH_CARD_TEXT(card, 3, "force l2");
1859         break;
1860     case QETH_DISCIPLINE_LAYER3:
1861         QETH_CARD_TEXT(card, 3, "force l3");
1862         break;
1863     default:
1864         QETH_CARD_TEXT(card, 3, "force no");
1865     }
1866
1867     return disc;
1868 }
1869
1870 static void qeth_set_blkt_defaults(struct qeth_card *card)
1871 {
1872     QETH_CARD_TEXT(card, 2, "cfgblkt");
1873
1874     if (card->info.use_v1_blkt) {
1875         card->info.blkt.time_total = 0;
1876         card->info.blkt.inter_packet = 0;
1877         card->info.blkt.inter_packet_jumbo = 0;
1878     } else {
1879         card->info.blkt.time_total = 250;
1880         card->info.blkt.inter_packet = 5;
1881         card->info.blkt.inter_packet_jumbo = 15;
1882     }
1883 }
1884
1885 static void qeth_idx_init(struct qeth_card *card)
1886 {
1887     memset(&card->seqno, 0, sizeof(card->seqno));
1888
1889     card->token.issuer_rm_w = 0x00010103UL;
1890     card->token.cm_filter_w = 0x00010108UL;
1891     card->token.cm_connection_w = 0x0001010aUL;
1892     card->token.ulp_filter_w = 0x0001010bUL;
1893     card->token.ulp_connection_w = 0x0001010dUL;
1894
1895     switch (card->info.type) {
1896     case QETH_CARD_TYPE_IQD:
1897         card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1898         break;
1899     case QETH_CARD_TYPE_OSD:
1900         card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1901         break;
1902     default:
1903         break;
1904     }
1905 }
1906
1907 static void qeth_idx_finalize_cmd(struct qeth_card *card,
1908                   struct qeth_cmd_buffer *iob)
1909 {
1910     memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), &card->seqno.trans_hdr,
1911            QETH_SEQ_NO_LENGTH);
1912     if (iob->channel == &card->write)
1913         card->seqno.trans_hdr++;
1914 }
1915
1916 static int qeth_peer_func_level(int level)
1917 {
1918     if ((level & 0xff) == 8)
1919         return (level & 0xff) + 0x400;
1920     if (((level >> 8) & 3) == 1)
1921         return (level & 0xff) + 0x200;
1922     return level;
1923 }
1924
1925 static void qeth_mpc_finalize_cmd(struct qeth_card *card,
1926                   struct qeth_cmd_buffer *iob)
1927 {
1928     qeth_idx_finalize_cmd(card, iob);
1929
1930     memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
1931            &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
1932     card->seqno.pdu_hdr++;
1933     memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
1934            &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
1935
1936     iob->callback = qeth_release_buffer_cb;
1937 }
1938
1939 static bool qeth_mpc_match_reply(struct qeth_cmd_buffer *iob,
1940                  struct qeth_cmd_buffer *reply)
1941 {
1942     /* MPC cmds are issued strictly in sequence. */
1943     return !IS_IPA(reply->data);
1944 }
1945
1946 static struct qeth_cmd_buffer *qeth_mpc_alloc_cmd(struct qeth_card *card,
1947                           const void *data,
1948                           unsigned int data_length)
1949 {
1950     struct qeth_cmd_buffer *iob;
1951
1952     iob = qeth_alloc_cmd(&card->write, data_length, 1, QETH_TIMEOUT);
1953     if (!iob)
1954         return NULL;
1955
1956     memcpy(iob->data, data, data_length);
1957     qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, data_length,
1958                iob->data);
1959     iob->finalize = qeth_mpc_finalize_cmd;
1960     iob->match = qeth_mpc_match_reply;
1961     return iob;
1962 }
1963
1964 /**
1965  * qeth_send_control_data() -   send control command to the card
1966  * @card:           qeth_card structure pointer
1967  * @iob:            qeth_cmd_buffer pointer
1968  * @reply_cb:           callback function pointer
1969  *  cb_card:            pointer to the qeth_card structure
1970  *  cb_reply:           pointer to the qeth_reply structure
1971  *  cb_cmd:         pointer to the original iob for non-IPA
1972  *              commands, or to the qeth_ipa_cmd structure
1973  *              for the IPA commands.
1974  * @reply_param:        private pointer passed to the callback
1975  *
1976  * Callback function gets called one or more times, with cb_cmd
1977  * pointing to the response returned by the hardware. Callback
1978  * function must return
1979  *   > 0 if more reply blocks are expected,
1980  *     0 if the last or only reply block is received, and
1981  *   < 0 on error.
1982  * Callback function can get the value of the reply_param pointer from the
1983  * field 'param' of the structure qeth_reply.
1984  */
1985
1986 static int qeth_send_control_data(struct qeth_card *card,
1987                   struct qeth_cmd_buffer *iob,
1988                   int (*reply_cb)(struct qeth_card *cb_card,
1989                           struct qeth_reply *cb_reply,
1990                           unsigned long cb_cmd),
1991                   void *reply_param)
1992 {
1993     struct qeth_channel *channel = iob->channel;
1994     struct qeth_reply *reply = &iob->reply;
1995     long timeout = iob->timeout;
1996     int rc;
1997
1998     QETH_CARD_TEXT(card, 2, "sendctl");
1999
2000     reply->callback = reply_cb;
2001     reply->param = reply_param;
2002
2003     timeout = wait_event_interruptible_timeout(card->wait_q,
2004                            qeth_trylock_channel(channel, iob),
2005                            timeout);
2006     if (timeout <= 0) {
2007         qeth_put_cmd(iob);
2008         return (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
2009     }
2010
2011     if (iob->finalize)
2012         iob->finalize(card, iob);
2013     QETH_DBF_HEX(CTRL, 2, iob->data, min(iob->length, QETH_DBF_CTRL_LEN));
2014
2015     qeth_enqueue_cmd(card, iob);
2016
2017     /* This pairs with iob->callback, and keeps the iob alive after IO: */
2018     qeth_get_cmd(iob);
2019
2020     QETH_CARD_TEXT(card, 6, "noirqpnd");
2021     spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
2022     rc = ccw_device_start_timeout(channel->ccwdev, __ccw_from_cmd(iob),
2023                       (addr_t) iob, 0, 0, timeout);
2024     spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
2025     if (rc) {
2026         QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n",
2027                  CARD_DEVID(card), rc);
2028         QETH_CARD_TEXT_(card, 2, " err%d", rc);
2029         qeth_dequeue_cmd(card, iob);
2030         qeth_put_cmd(iob);
2031         qeth_unlock_channel(card, channel);
2032         goto out;
2033     }
2034
2035     timeout = wait_for_completion_interruptible_timeout(&iob->done,
2036                                 timeout);
2037     if (timeout <= 0)
2038         rc = (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
2039
2040     qeth_dequeue_cmd(card, iob);
2041
2042     if (reply_cb) {
2043         /* Wait until the callback for a late reply has completed: */
2044         spin_lock_irq(&iob->lock);
2045         if (rc)
2046             /* Zap any callback that's still pending: */
2047             iob->rc = rc;
2048         spin_unlock_irq(&iob->lock);
2049     }
2050
2051     if (!rc)
2052         rc = iob->rc;
2053
2054 out:
2055     qeth_put_cmd(iob);
2056     return rc;
2057 }
2058
2059 struct qeth_node_desc {
2060     struct node_descriptor nd1;
2061     struct node_descriptor nd2;
2062     struct node_descriptor nd3;
2063 };
2064
2065 static void qeth_read_conf_data_cb(struct qeth_card *card,
2066                    struct qeth_cmd_buffer *iob,
2067                    unsigned int data_length)
2068 {
2069     struct qeth_node_desc *nd = (struct qeth_node_desc *) iob->data;
2070     int rc = 0;
2071     u8 *tag;
2072
2073     QETH_CARD_TEXT(card, 2, "cfgunit");
2074
2075     if (data_length < sizeof(*nd)) {
2076         rc = -EINVAL;
2077         goto out;
2078     }
2079
2080     card->info.is_vm_nic = nd->nd1.plant[0] == _ascebc['V'] &&
2081                    nd->nd1.plant[1] == _ascebc['M'];
2082     tag = (u8 *)&nd->nd1.tag;
2083     card->info.chpid = tag[0];
2084     card->info.unit_addr2 = tag[1];
2085
2086     tag = (u8 *)&nd->nd2.tag;
2087     card->info.cula = tag[1];
2088
2089     card->info.use_v1_blkt = nd->nd3.model[0] == 0xF0 &&
2090                  nd->nd3.model[1] == 0xF0 &&
2091                  nd->nd3.model[2] >= 0xF1 &&
2092                  nd->nd3.model[2] <= 0xF4;
2093
2094 out:
2095     qeth_notify_cmd(iob, rc);
2096     qeth_put_cmd(iob);
2097 }
2098
2099 static int qeth_read_conf_data(struct qeth_card *card)
2100 {
2101     struct qeth_channel *channel = &card->data;
2102     struct qeth_cmd_buffer *iob;
2103     struct ciw *ciw;
2104
2105     /* scan for RCD command in extended SenseID data */
2106     ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
2107     if (!ciw || ciw->cmd == 0)
2108         return -EOPNOTSUPP;
2109     if (ciw->count < sizeof(struct qeth_node_desc))
2110         return -EINVAL;
2111
2112     iob = qeth_alloc_cmd(channel, ciw->count, 1, QETH_RCD_TIMEOUT);
2113     if (!iob)
2114         return -ENOMEM;
2115
2116     iob->callback = qeth_read_conf_data_cb;
2117     qeth_setup_ccw(__ccw_from_cmd(iob), ciw->cmd, 0, iob->length,
2118                iob->data);
2119
2120     return qeth_send_control_data(card, iob, NULL, NULL);
2121 }
2122
2123 static int qeth_idx_check_activate_response(struct qeth_card *card,
2124                         struct qeth_channel *channel,
2125                         struct qeth_cmd_buffer *iob)
2126 {
2127     int rc;
2128
2129     rc = qeth_check_idx_response(card, iob->data);
2130     if (rc)
2131         return rc;
2132
2133     if (QETH_IS_IDX_ACT_POS_REPLY(iob->data))
2134         return 0;
2135
2136     /* negative reply: */
2137     QETH_CARD_TEXT_(card, 2, "idxneg%c",
2138             QETH_IDX_ACT_CAUSE_CODE(iob->data));
2139
2140     switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
2141     case QETH_IDX_ACT_ERR_EXCL:
2142         dev_err(&channel->ccwdev->dev,
2143             "The adapter is used exclusively by another host\n");
2144         return -EBUSY;
2145     case QETH_IDX_ACT_ERR_AUTH:
2146     case QETH_IDX_ACT_ERR_AUTH_USER:
2147         dev_err(&channel->ccwdev->dev,
2148             "Setting the device online failed because of insufficient authorization\n");
2149         return -EPERM;
2150     default:
2151         QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n",
2152                  CCW_DEVID(channel->ccwdev));
2153         return -EIO;
2154     }
2155 }
2156
2157 static void qeth_idx_activate_read_channel_cb(struct qeth_card *card,
2158                           struct qeth_cmd_buffer *iob,
2159                           unsigned int data_length)
2160 {
2161     struct qeth_channel *channel = iob->channel;
2162     u16 peer_level;
2163     int rc;
2164
2165     QETH_CARD_TEXT(card, 2, "idxrdcb");
2166
2167     rc = qeth_idx_check_activate_response(card, channel, iob);
2168     if (rc)
2169         goto out;
2170
2171     memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2172     if (peer_level != qeth_peer_func_level(card->info.func_level)) {
2173         QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2174                  CCW_DEVID(channel->ccwdev),
2175                  card->info.func_level, peer_level);
2176         rc = -EINVAL;
2177         goto out;
2178     }
2179
2180     memcpy(&card->token.issuer_rm_r,
2181            QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2182            QETH_MPC_TOKEN_LENGTH);
2183     memcpy(&card->info.mcl_level[0],
2184            QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
2185
2186 out:
2187     qeth_notify_cmd(iob, rc);
2188     qeth_put_cmd(iob);
2189 }
2190
2191 static void qeth_idx_activate_write_channel_cb(struct qeth_card *card,
2192                            struct qeth_cmd_buffer *iob,
2193                            unsigned int data_length)
2194 {
2195     struct qeth_channel *channel = iob->channel;
2196     u16 peer_level;
2197     int rc;
2198
2199     QETH_CARD_TEXT(card, 2, "idxwrcb");
2200
2201     rc = qeth_idx_check_activate_response(card, channel, iob);
2202     if (rc)
2203         goto out;
2204
2205     memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2206     if ((peer_level & ~0x0100) !=
2207         qeth_peer_func_level(card->info.func_level)) {
2208         QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2209                  CCW_DEVID(channel->ccwdev),
2210                  card->info.func_level, peer_level);
2211         rc = -EINVAL;
2212     }
2213
2214 out:
2215     qeth_notify_cmd(iob, rc);
2216     qeth_put_cmd(iob);
2217 }
2218
2219 static void qeth_idx_setup_activate_cmd(struct qeth_card *card,
2220                     struct qeth_cmd_buffer *iob)
2221 {
2222     u16 addr = (card->info.cula << 8) + card->info.unit_addr2;
2223     u8 port = ((u8)card->dev->dev_port) | 0x80;
2224     struct ccw1 *ccw = __ccw_from_cmd(iob);
2225
2226     qeth_setup_ccw(&ccw[0], CCW_CMD_WRITE, CCW_FLAG_CC, IDX_ACTIVATE_SIZE,
2227                iob->data);
2228     qeth_setup_ccw(&ccw[1], CCW_CMD_READ, 0, iob->length, iob->data);
2229     iob->finalize = qeth_idx_finalize_cmd;
2230
2231     port |= QETH_IDX_ACT_INVAL_FRAME;
2232     memcpy(QETH_IDX_ACT_PNO(iob->data), &port, 1);
2233     memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2234            &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
2235     memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
2236            &card->info.func_level, 2);
2237     memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &card->info.ddev_devno, 2);
2238     memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &addr, 2);
2239 }
2240
2241 static int qeth_idx_activate_read_channel(struct qeth_card *card)
2242 {
2243     struct qeth_channel *channel = &card->read;
2244     struct qeth_cmd_buffer *iob;
2245     int rc;
2246
2247     QETH_CARD_TEXT(card, 2, "idxread");
2248
2249     iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2250     if (!iob)
2251         return -ENOMEM;
2252
2253     memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
2254     qeth_idx_setup_activate_cmd(card, iob);
2255     iob->callback = qeth_idx_activate_read_channel_cb;
2256
2257     rc = qeth_send_control_data(card, iob, NULL, NULL);
2258     if (rc)
2259         return rc;
2260
2261     channel->state = CH_STATE_UP;
2262     return 0;
2263 }
2264
2265 static int qeth_idx_activate_write_channel(struct qeth_card *card)
2266 {
2267     struct qeth_channel *channel = &card->write;
2268     struct qeth_cmd_buffer *iob;
2269     int rc;
2270
2271     QETH_CARD_TEXT(card, 2, "idxwrite");
2272
2273     iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2274     if (!iob)
2275         return -ENOMEM;
2276
2277     memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
2278     qeth_idx_setup_activate_cmd(card, iob);
2279     iob->callback = qeth_idx_activate_write_channel_cb;
2280
2281     rc = qeth_send_control_data(card, iob, NULL, NULL);
2282     if (rc)
2283         return rc;
2284
2285     channel->state = CH_STATE_UP;
2286     return 0;
2287 }
2288
2289 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2290         unsigned long data)
2291 {
2292     struct qeth_cmd_buffer *iob;
2293
2294     QETH_CARD_TEXT(card, 2, "cmenblcb");
2295
2296     iob = (struct qeth_cmd_buffer *) data;
2297     memcpy(&card->token.cm_filter_r,
2298            QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2299            QETH_MPC_TOKEN_LENGTH);
2300     return 0;
2301 }
2302
2303 static int qeth_cm_enable(struct qeth_card *card)
2304 {
2305     struct qeth_cmd_buffer *iob;
2306
2307     QETH_CARD_TEXT(card, 2, "cmenable");
2308
2309     iob = qeth_mpc_alloc_cmd(card, CM_ENABLE, CM_ENABLE_SIZE);
2310     if (!iob)
2311         return -ENOMEM;
2312
2313     memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2314            &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2315     memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2316            &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2317
2318     return qeth_send_control_data(card, iob, qeth_cm_enable_cb, NULL);
2319 }
2320
2321 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2322         unsigned long data)
2323 {
2324     struct qeth_cmd_buffer *iob;
2325
2326     QETH_CARD_TEXT(card, 2, "cmsetpcb");
2327
2328     iob = (struct qeth_cmd_buffer *) data;
2329     memcpy(&card->token.cm_connection_r,
2330            QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2331            QETH_MPC_TOKEN_LENGTH);
2332     return 0;
2333 }
2334
2335 static int qeth_cm_setup(struct qeth_card *card)
2336 {
2337     struct qeth_cmd_buffer *iob;
2338
2339     QETH_CARD_TEXT(card, 2, "cmsetup");
2340
2341     iob = qeth_mpc_alloc_cmd(card, CM_SETUP, CM_SETUP_SIZE);
2342     if (!iob)
2343         return -ENOMEM;
2344
2345     memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2346            &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2347     memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2348            &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2349     memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2350            &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2351     return qeth_send_control_data(card, iob, qeth_cm_setup_cb, NULL);
2352 }
2353
2354 static bool qeth_is_supported_link_type(struct qeth_card *card, u8 link_type)
2355 {
2356     if (link_type == QETH_LINK_TYPE_LANE_TR ||
2357         link_type == QETH_LINK_TYPE_HSTR) {
2358         dev_err(&card->gdev->dev, "Unsupported Token Ring device\n");
2359         return false;
2360     }
2361
2362     return true;
2363 }
2364
2365 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
2366 {
2367     struct net_device *dev = card->dev;
2368     unsigned int new_mtu;
2369
2370     if (!max_mtu) {
2371         /* IQD needs accurate max MTU to set up its RX buffers: */
2372         if (IS_IQD(card))
2373             return -EINVAL;
2374         /* tolerate quirky HW: */
2375         max_mtu = ETH_MAX_MTU;
2376     }
2377
2378     rtnl_lock();
2379     if (IS_IQD(card)) {
2380         /* move any device with default MTU to new max MTU: */
2381         new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
2382
2383         /* adjust RX buffer size to new max MTU: */
2384         card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
2385         if (dev->max_mtu && dev->max_mtu != max_mtu)
2386             qeth_free_qdio_queues(card);
2387     } else {
2388         if (dev->mtu)
2389             new_mtu = dev->mtu;
2390         /* default MTUs for first setup: */
2391         else if (IS_LAYER2(card))
2392             new_mtu = ETH_DATA_LEN;
2393         else
2394             new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
2395     }
2396
2397     dev->max_mtu = max_mtu;
2398     dev->mtu = min(new_mtu, max_mtu);
2399     rtnl_unlock();
2400     return 0;
2401 }
2402
2403 static int qeth_get_mtu_outof_framesize(int framesize)
2404 {
2405     switch (framesize) {
2406     case 0x4000:
2407         return 8192;
2408     case 0x6000:
2409         return 16384;
2410     case 0xa000:
2411         return 32768;
2412     case 0xffff:
2413         return 57344;
2414     default:
2415         return 0;
2416     }
2417 }
2418
2419 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2420         unsigned long data)
2421 {
2422     __u16 mtu, framesize;
2423     __u16 len;
2424     struct qeth_cmd_buffer *iob;
2425     u8 link_type = 0;
2426
2427     QETH_CARD_TEXT(card, 2, "ulpenacb");
2428
2429     iob = (struct qeth_cmd_buffer *) data;
2430     memcpy(&card->token.ulp_filter_r,
2431            QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2432            QETH_MPC_TOKEN_LENGTH);
2433     if (IS_IQD(card)) {
2434         memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2435         mtu = qeth_get_mtu_outof_framesize(framesize);
2436     } else {
2437         mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
2438     }
2439     *(u16 *)reply->param = mtu;
2440
2441     memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2442     if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2443         memcpy(&link_type,
2444                QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2445         if (!qeth_is_supported_link_type(card, link_type))
2446             return -EPROTONOSUPPORT;
2447     }
2448
2449     card->info.link_type = link_type;
2450     QETH_CARD_TEXT_(card, 2, "link%d", card->info.link_type);
2451     return 0;
2452 }
2453
2454 static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
2455 {
2456     return IS_LAYER2(card) ? QETH_MPC_PROT_L2 : QETH_MPC_PROT_L3;
2457 }
2458
2459 static int qeth_ulp_enable(struct qeth_card *card)
2460 {
2461     u8 prot_type = qeth_mpc_select_prot_type(card);
2462     struct qeth_cmd_buffer *iob;
2463     u16 max_mtu;
2464     int rc;
2465
2466     QETH_CARD_TEXT(card, 2, "ulpenabl");
2467
2468     iob = qeth_mpc_alloc_cmd(card, ULP_ENABLE, ULP_ENABLE_SIZE);
2469     if (!iob)
2470         return -ENOMEM;
2471
2472     *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
2473     memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2474     memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2475            &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2476     memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2477            &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2478     rc = qeth_send_control_data(card, iob, qeth_ulp_enable_cb, &max_mtu);
2479     if (rc)
2480         return rc;
2481     return qeth_update_max_mtu(card, max_mtu);
2482 }
2483
2484 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2485         unsigned long data)
2486 {
2487     struct qeth_cmd_buffer *iob;
2488
2489     QETH_CARD_TEXT(card, 2, "ulpstpcb");
2490
2491     iob = (struct qeth_cmd_buffer *) data;
2492     memcpy(&card->token.ulp_connection_r,
2493            QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2494            QETH_MPC_TOKEN_LENGTH);
2495     if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2496              3)) {
2497         QETH_CARD_TEXT(card, 2, "olmlimit");
2498         dev_err(&card->gdev->dev, "A connection could not be "
2499             "established because of an OLM limit\n");
2500         return -EMLINK;
2501     }
2502     return 0;
2503 }
2504
2505 static int qeth_ulp_setup(struct qeth_card *card)
2506 {
2507     __u16 temp;
2508     struct qeth_cmd_buffer *iob;
2509
2510     QETH_CARD_TEXT(card, 2, "ulpsetup");
2511
2512     iob = qeth_mpc_alloc_cmd(card, ULP_SETUP, ULP_SETUP_SIZE);
2513     if (!iob)
2514         return -ENOMEM;
2515
2516     memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2517            &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2518     memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2519            &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2520     memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2521            &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2522
2523     memcpy(QETH_ULP_SETUP_CUA(iob->data), &card->info.ddev_devno, 2);
2524     temp = (card->info.cula << 8) + card->info.unit_addr2;
2525     memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2526     return qeth_send_control_data(card, iob, qeth_ulp_setup_cb, NULL);
2527 }
2528
2529 static int qeth_alloc_out_buf(struct qeth_qdio_out_q *q, unsigned int bidx,
2530                   gfp_t gfp)
2531 {
2532     struct qeth_qdio_out_buffer *newbuf;
2533
2534     newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, gfp);
2535     if (!newbuf)
2536         return -ENOMEM;
2537
2538     newbuf->buffer = q->qdio_bufs[bidx];
2539     skb_queue_head_init(&newbuf->skb_list);
2540     lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2541     atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2542     q->bufs[bidx] = newbuf;
2543     return 0;
2544 }
2545
2546 static void qeth_free_output_queue(struct qeth_qdio_out_q *q)
2547 {
2548     if (!q)
2549         return;
2550
2551     qeth_drain_output_queue(q, true);
2552     qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2553     kfree(q);
2554 }
2555
2556 static struct qeth_qdio_out_q *qeth_alloc_output_queue(void)
2557 {
2558     struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2559     unsigned int i;
2560
2561     if (!q)
2562         return NULL;
2563
2564     if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q))
2565         goto err_qdio_bufs;
2566
2567     for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
2568         if (qeth_alloc_out_buf(q, i, GFP_KERNEL))
2569             goto err_out_bufs;
2570     }
2571
2572     return q;
2573
2574 err_out_bufs:
2575     while (i > 0)
2576         qeth_free_out_buf(q->bufs[--i]);
2577     qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2578 err_qdio_bufs:
2579     kfree(q);
2580     return NULL;
2581 }
2582
2583 static void qeth_tx_completion_timer(struct timer_list *timer)
2584 {
2585     struct qeth_qdio_out_q *queue = from_timer(queue, timer, timer);
2586
2587     napi_schedule(&queue->napi);
2588     QETH_TXQ_STAT_INC(queue, completion_timer);
2589 }
2590
2591 static int qeth_alloc_qdio_queues(struct qeth_card *card)
2592 {
2593     unsigned int i;
2594
2595     QETH_CARD_TEXT(card, 2, "allcqdbf");
2596
2597     if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2598         QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2599         return 0;
2600
2601     /* inbound buffer pool */
2602     if (qeth_alloc_buffer_pool(card))
2603         goto out_buffer_pool;
2604
2605     /* outbound */
2606     for (i = 0; i < card->qdio.no_out_queues; ++i) {
2607         struct qeth_qdio_out_q *queue;
2608
2609         queue = qeth_alloc_output_queue();
2610         if (!queue)
2611             goto out_freeoutq;
2612         QETH_CARD_TEXT_(card, 2, "outq %i", i);
2613         QETH_CARD_HEX(card, 2, &queue, sizeof(void *));
2614         card->qdio.out_qs[i] = queue;
2615         queue->card = card;
2616         queue->queue_no = i;
2617         INIT_LIST_HEAD(&queue->pending_bufs);
2618         spin_lock_init(&queue->lock);
2619         timer_setup(&queue->timer, qeth_tx_completion_timer, 0);
2620         if (IS_IQD(card)) {
2621             queue->coalesce_usecs = QETH_TX_COALESCE_USECS;
2622             queue->max_coalesced_frames = QETH_TX_MAX_COALESCED_FRAMES;
2623             queue->rescan_usecs = QETH_TX_TIMER_USECS;
2624         } else {
2625             queue->coalesce_usecs = USEC_PER_SEC;
2626             queue->max_coalesced_frames = 0;
2627             queue->rescan_usecs = 10 * USEC_PER_SEC;
2628         }
2629         queue->priority = QETH_QIB_PQUE_PRIO_DEFAULT;
2630     }
2631
2632     /* completion */
2633     if (qeth_alloc_cq(card))
2634         goto out_freeoutq;
2635
2636     return 0;
2637
2638 out_freeoutq:
2639     while (i > 0) {
2640         qeth_free_output_queue(card->qdio.out_qs[--i]);
2641         card->qdio.out_qs[i] = NULL;
2642     }
2643     qeth_free_buffer_pool(card);
2644 out_buffer_pool:
2645     atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2646     return -ENOMEM;
2647 }
2648
2649 static void qeth_free_qdio_queues(struct qeth_card *card)
2650 {
2651     int i, j;
2652
2653     if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2654         QETH_QDIO_UNINITIALIZED)
2655         return;
2656
2657     qeth_free_cq(card);
2658     for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2659         if (card->qdio.in_q->bufs[j].rx_skb) {
2660             consume_skb(card->qdio.in_q->bufs[j].rx_skb);
2661             card->qdio.in_q->bufs[j].rx_skb = NULL;
2662         }
2663     }
2664
2665     /* inbound buffer pool */
2666     qeth_free_buffer_pool(card);
2667     /* free outbound qdio_qs */
2668     for (i = 0; i < card->qdio.no_out_queues; i++) {
2669         qeth_free_output_queue(card->qdio.out_qs[i]);
2670         card->qdio.out_qs[i] = NULL;
2671     }
2672 }
2673
2674 static void qeth_fill_qib_parms(struct qeth_card *card,
2675                 struct qeth_qib_parms *parms)
2676 {
2677     struct qeth_qdio_out_q *queue;
2678     unsigned int i;
2679
2680     parms->pcit_magic[0] = 'P';
2681     parms->pcit_magic[1] = 'C';
2682     parms->pcit_magic[2] = 'I';
2683     parms->pcit_magic[3] = 'T';
2684     ASCEBC(parms->pcit_magic, sizeof(parms->pcit_magic));
2685     parms->pcit_a = QETH_PCI_THRESHOLD_A(card);
2686     parms->pcit_b = QETH_PCI_THRESHOLD_B(card);
2687     parms->pcit_c = QETH_PCI_TIMER_VALUE(card);
2688
2689     parms->blkt_magic[0] = 'B';
2690     parms->blkt_magic[1] = 'L';
2691     parms->blkt_magic[2] = 'K';
2692     parms->blkt_magic[3] = 'T';
2693     ASCEBC(parms->blkt_magic, sizeof(parms->blkt_magic));
2694     parms->blkt_total = card->info.blkt.time_total;
2695     parms->blkt_inter_packet = card->info.blkt.inter_packet;
2696     parms->blkt_inter_packet_jumbo = card->info.blkt.inter_packet_jumbo;
2697
2698     /* Prio-queueing implicitly uses the default priorities: */
2699     if (qeth_uses_tx_prio_queueing(card) || card->qdio.no_out_queues == 1)
2700         return;
2701
2702     parms->pque_magic[0] = 'P';
2703     parms->pque_magic[1] = 'Q';
2704     parms->pque_magic[2] = 'U';
2705     parms->pque_magic[3] = 'E';
2706     ASCEBC(parms->pque_magic, sizeof(parms->pque_magic));
2707     parms->pque_order = QETH_QIB_PQUE_ORDER_RR;
2708     parms->pque_units = QETH_QIB_PQUE_UNITS_SBAL;
2709
2710     qeth_for_each_output_queue(card, queue, i)
2711         parms->pque_priority[i] = queue->priority;
2712 }
2713
2714 static int qeth_qdio_activate(struct qeth_card *card)
2715 {
2716     QETH_CARD_TEXT(card, 3, "qdioact");
2717     return qdio_activate(CARD_DDEV(card));
2718 }
2719
2720 static int qeth_dm_act(struct qeth_card *card)
2721 {
2722     struct qeth_cmd_buffer *iob;
2723
2724     QETH_CARD_TEXT(card, 2, "dmact");
2725
2726     iob = qeth_mpc_alloc_cmd(card, DM_ACT, DM_ACT_SIZE);
2727     if (!iob)
2728         return -ENOMEM;
2729
2730     memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2731            &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2732     memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2733            &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2734     return qeth_send_control_data(card, iob, NULL, NULL);
2735 }
2736
2737 static int qeth_mpc_initialize(struct qeth_card *card)
2738 {
2739     int rc;
2740
2741     QETH_CARD_TEXT(card, 2, "mpcinit");
2742
2743     rc = qeth_issue_next_read(card);
2744     if (rc) {
2745         QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2746         return rc;
2747     }
2748     rc = qeth_cm_enable(card);
2749     if (rc) {
2750         QETH_CARD_TEXT_(card, 2, "2err%d", rc);
2751         return rc;
2752     }
2753     rc = qeth_cm_setup(card);
2754     if (rc) {
2755         QETH_CARD_TEXT_(card, 2, "3err%d", rc);
2756         return rc;
2757     }
2758     rc = qeth_ulp_enable(card);
2759     if (rc) {
2760         QETH_CARD_TEXT_(card, 2, "4err%d", rc);
2761         return rc;
2762     }
2763     rc = qeth_ulp_setup(card);
2764     if (rc) {
2765         QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2766         return rc;
2767     }
2768     rc = qeth_alloc_qdio_queues(card);
2769     if (rc) {
2770         QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2771         return rc;
2772     }
2773     rc = qeth_qdio_establish(card);
2774     if (rc) {
2775         QETH_CARD_TEXT_(card, 2, "6err%d", rc);
2776         qeth_free_qdio_queues(card);
2777         return rc;
2778     }
2779     rc = qeth_qdio_activate(card);
2780     if (rc) {
2781         QETH_CARD_TEXT_(card, 2, "7err%d", rc);
2782         return rc;
2783     }
2784     rc = qeth_dm_act(card);
2785     if (rc) {
2786         QETH_CARD_TEXT_(card, 2, "8err%d", rc);
2787         return rc;
2788     }
2789
2790     return 0;
2791 }
2792
2793 static void qeth_print_status_message(struct qeth_card *card)
2794 {
2795     switch (card->info.type) {
2796     case QETH_CARD_TYPE_OSD:
2797     case QETH_CARD_TYPE_OSM:
2798     case QETH_CARD_TYPE_OSX:
2799         /* VM will use a non-zero first character
2800          * to indicate a HiperSockets like reporting
2801          * of the level OSA sets the first character to zero
2802          * */
2803         if (!card->info.mcl_level[0]) {
2804             sprintf(card->info.mcl_level, "%02x%02x",
2805                 card->info.mcl_level[2],
2806                 card->info.mcl_level[3]);
2807             break;
2808         }
2809         fallthrough;
2810     case QETH_CARD_TYPE_IQD:
2811         if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) {
2812             card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2813                 card->info.mcl_level[0]];
2814             card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2815                 card->info.mcl_level[1]];
2816             card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2817                 card->info.mcl_level[2]];
2818             card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2819                 card->info.mcl_level[3]];
2820             card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2821         }
2822         break;
2823     default:
2824         memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2825     }
2826     dev_info(&card->gdev->dev,
2827          "Device is a%s card%s%s%s\nwith link type %s.\n",
2828          qeth_get_cardname(card),
2829          (card->info.mcl_level[0]) ? " (level: " : "",
2830          (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2831          (card->info.mcl_level[0]) ? ")" : "",
2832          qeth_get_cardname_short(card));
2833 }
2834
2835 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2836 {
2837     struct qeth_buffer_pool_entry *entry;
2838
2839     QETH_CARD_TEXT(card, 5, "inwrklst");
2840
2841     list_for_each_entry(entry,
2842                 &card->qdio.init_pool.entry_list, init_list) {
2843         qeth_put_buffer_pool_entry(card, entry);
2844     }
2845 }
2846
2847 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2848                     struct qeth_card *card)
2849 {
2850     struct qeth_buffer_pool_entry *entry;
2851     int i, free;
2852
2853     if (list_empty(&card->qdio.in_buf_pool.entry_list))
2854         return NULL;
2855
2856     list_for_each_entry(entry, &card->qdio.in_buf_pool.entry_list, list) {
2857         free = 1;
2858         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2859             if (page_count(entry->elements[i]) > 1) {
2860                 free = 0;
2861                 break;
2862             }
2863         }
2864         if (free) {
2865             list_del_init(&entry->list);
2866             return entry;
2867         }
2868     }
2869
2870     /* no free buffer in pool so take first one and swap pages */
2871     entry = list_first_entry(&card->qdio.in_buf_pool.entry_list,
2872                  struct qeth_buffer_pool_entry, list);
2873     for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2874         if (page_count(entry->elements[i]) > 1) {
2875             struct page *page = dev_alloc_page();
2876
2877             if (!page)
2878                 return NULL;
2879
2880             __free_page(entry->elements[i]);
2881             entry->elements[i] = page;
2882             QETH_CARD_STAT_INC(card, rx_sg_alloc_page);
2883         }
2884     }
2885     list_del_init(&entry->list);
2886     return entry;
2887 }
2888
2889 static int qeth_init_input_buffer(struct qeth_card *card,
2890         struct qeth_qdio_buffer *buf)
2891 {
2892     struct qeth_buffer_pool_entry *pool_entry = buf->pool_entry;
2893     int i;
2894
2895     if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2896         buf->rx_skb = netdev_alloc_skb(card->dev,
2897                            ETH_HLEN +
2898                            sizeof(struct ipv6hdr));
2899         if (!buf->rx_skb)
2900             return -ENOMEM;
2901     }
2902
2903     if (!pool_entry) {
2904         pool_entry = qeth_find_free_buffer_pool_entry(card);
2905         if (!pool_entry)
2906             return -ENOBUFS;
2907
2908         buf->pool_entry = pool_entry;
2909     }
2910
2911     /*
2912      * since the buffer is accessed only from the input_tasklet
2913      * there shouldn't be a need to synchronize; also, since we use
2914      * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
2915      * buffers
2916      */
2917     for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2918         buf->buffer->element[i].length = PAGE_SIZE;
2919         buf->buffer->element[i].addr =
2920             page_to_phys(pool_entry->elements[i]);
2921         if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2922             buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2923         else
2924             buf->buffer->element[i].eflags = 0;
2925         buf->buffer->element[i].sflags = 0;
2926     }
2927     return 0;
2928 }
2929
2930 static unsigned int qeth_tx_select_bulk_max(struct qeth_card *card,
2931                         struct qeth_qdio_out_q *queue)
2932 {
2933     if (!IS_IQD(card) ||
2934         qeth_iqd_is_mcast_queue(card, queue) ||
2935         card->options.cq == QETH_CQ_ENABLED ||
2936         qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd))
2937         return 1;
2938
2939     return card->ssqd.mmwc ? card->ssqd.mmwc : 1;
2940 }
2941
2942 static int qeth_init_qdio_queues(struct qeth_card *card)
2943 {
2944     unsigned int rx_bufs = card->qdio.in_buf_pool.buf_count;
2945     unsigned int i;
2946     int rc;
2947
2948     QETH_CARD_TEXT(card, 2, "initqdqs");
2949
2950     /* inbound queue */
2951     qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2952     memset(&card->rx, 0, sizeof(struct qeth_rx));
2953
2954     qeth_initialize_working_pool_list(card);
2955     /*give only as many buffers to hardware as we have buffer pool entries*/
2956     for (i = 0; i < rx_bufs; i++) {
2957         rc = qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
2958         if (rc)
2959             return rc;
2960     }
2961
2962     card->qdio.in_q->next_buf_to_init = QDIO_BUFNR(rx_bufs);
2963     rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), 0, 0, rx_bufs);
2964     if (rc) {
2965         QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2966         return rc;
2967     }
2968
2969     /* completion */
2970     rc = qeth_cq_init(card);
2971     if (rc) {
2972         return rc;
2973     }
2974
2975     /* outbound queue */
2976     for (i = 0; i < card->qdio.no_out_queues; ++i) {
2977         struct qeth_qdio_out_q *queue = card->qdio.out_qs[i];
2978
2979         qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2980         queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
2981         queue->next_buf_to_fill = 0;
2982         queue->do_pack = 0;
2983         queue->prev_hdr = NULL;
2984         queue->coalesced_frames = 0;
2985         queue->bulk_start = 0;
2986         queue->bulk_count = 0;
2987         queue->bulk_max = qeth_tx_select_bulk_max(card, queue);
2988         atomic_set(&queue->used_buffers, 0);
2989         atomic_set(&queue->set_pci_flags_count, 0);
2990         netdev_tx_reset_queue(netdev_get_tx_queue(card->dev, i));
2991     }
2992     return 0;
2993 }
2994
2995 static void qeth_ipa_finalize_cmd(struct qeth_card *card,
2996                   struct qeth_cmd_buffer *iob)
2997 {
2998     qeth_mpc_finalize_cmd(card, iob);
2999
3000     /* override with IPA-specific values: */
3001     __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa++;
3002 }
3003
3004 static void qeth_prepare_ipa_cmd(struct qeth_card *card,
3005                  struct qeth_cmd_buffer *iob, u16 cmd_length)
3006 {
3007     u8 prot_type = qeth_mpc_select_prot_type(card);
3008     u16 total_length = iob->length;
3009
3010     qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, total_length,
3011                iob->data);
3012     iob->finalize = qeth_ipa_finalize_cmd;
3013
3014     memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
3015     memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2);
3016     memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
3017     memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2);
3018     memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2);
3019     memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
3020            &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
3021     memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2);
3022 }
3023
3024 static bool qeth_ipa_match_reply(struct qeth_cmd_buffer *iob,
3025                  struct qeth_cmd_buffer *reply)
3026 {
3027     struct qeth_ipa_cmd *ipa_reply = __ipa_reply(reply);
3028
3029     return ipa_reply && (__ipa_cmd(iob)->hdr.seqno == ipa_reply->hdr.seqno);
3030 }
3031
3032 struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
3033                        enum qeth_ipa_cmds cmd_code,
3034                        enum qeth_prot_versions prot,
3035                        unsigned int data_length)
3036 {
3037     struct qeth_cmd_buffer *iob;
3038     struct qeth_ipacmd_hdr *hdr;
3039
3040     data_length += offsetof(struct qeth_ipa_cmd, data);
3041     iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_length, 1,
3042                  QETH_IPA_TIMEOUT);
3043     if (!iob)
3044         return NULL;
3045
3046     qeth_prepare_ipa_cmd(card, iob, data_length);
3047     iob->match = qeth_ipa_match_reply;
3048
3049     hdr = &__ipa_cmd(iob)->hdr;
3050     hdr->command = cmd_code;
3051     hdr->initiator = IPA_CMD_INITIATOR_HOST;
3052     /* hdr->seqno is set by qeth_send_control_data() */
3053     hdr->adapter_type = QETH_LINK_TYPE_FAST_ETH;
3054     hdr->rel_adapter_no = (u8) card->dev->dev_port;
3055     hdr->prim_version_no = IS_LAYER2(card) ? 2 : 1;
3056     hdr->param_count = 1;
3057     hdr->prot_version = prot;
3058     return iob;
3059 }
3060 EXPORT_SYMBOL_GPL(qeth_ipa_alloc_cmd);
3061
3062 static int qeth_send_ipa_cmd_cb(struct qeth_card *card,
3063                 struct qeth_reply *reply, unsigned long data)
3064 {
3065     struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3066
3067     return (cmd->hdr.return_code) ? -EIO : 0;
3068 }
3069
3070 /*
3071  * qeth_send_ipa_cmd() - send an IPA command
3072  *
3073  * See qeth_send_control_data() for explanation of the arguments.
3074  */
3075
3076 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
3077         int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
3078             unsigned long),
3079         void *reply_param)
3080 {
3081     int rc;
3082
3083     QETH_CARD_TEXT(card, 4, "sendipa");
3084
3085     if (card->read_or_write_problem) {
3086         qeth_put_cmd(iob);
3087         return -EIO;
3088     }
3089
3090     if (reply_cb == NULL)
3091         reply_cb = qeth_send_ipa_cmd_cb;
3092     rc = qeth_send_control_data(card, iob, reply_cb, reply_param);
3093     if (rc == -ETIME) {
3094         qeth_clear_ipacmd_list(card);
3095         qeth_schedule_recovery(card);
3096     }
3097     return rc;
3098 }
3099 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
3100
3101 static int qeth_send_startlan_cb(struct qeth_card *card,
3102                  struct qeth_reply *reply, unsigned long data)
3103 {
3104     struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3105
3106     if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE)
3107         return -ENETDOWN;
3108
3109     return (cmd->hdr.return_code) ? -EIO : 0;
3110 }
3111
3112 static int qeth_send_startlan(struct qeth_card *card)
3113 {
3114     struct qeth_cmd_buffer *iob;
3115
3116     QETH_CARD_TEXT(card, 2, "strtlan");
3117
3118     iob = qeth_ipa_alloc_cmd(card, IPA_CMD_STARTLAN, QETH_PROT_NONE, 0);
3119     if (!iob)
3120         return -ENOMEM;
3121     return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL);
3122 }
3123
3124 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
3125 {
3126     if (!cmd->hdr.return_code)
3127         cmd->hdr.return_code =
3128             cmd->data.setadapterparms.hdr.return_code;
3129     return cmd->hdr.return_code;
3130 }
3131
3132 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
3133         struct qeth_reply *reply, unsigned long data)
3134 {
3135     struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3136     struct qeth_query_cmds_supp *query_cmd;
3137
3138     QETH_CARD_TEXT(card, 3, "quyadpcb");
3139     if (qeth_setadpparms_inspect_rc(cmd))
3140         return -EIO;
3141
3142     query_cmd = &cmd->data.setadapterparms.data.query_cmds_supp;
3143     if (query_cmd->lan_type & 0x7f) {
3144         if (!qeth_is_supported_link_type(card, query_cmd->lan_type))
3145             return -EPROTONOSUPPORT;
3146
3147         card->info.link_type = query_cmd->lan_type;
3148         QETH_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type);
3149     }
3150
3151     card->options.adp.supported = query_cmd->supported_cmds;
3152     return 0;
3153 }
3154
3155 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
3156                             enum qeth_ipa_setadp_cmd adp_cmd,
3157                             unsigned int data_length)
3158 {
3159     struct qeth_ipacmd_setadpparms_hdr *hdr;
3160     struct qeth_cmd_buffer *iob;
3161
3162     iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETADAPTERPARMS, QETH_PROT_IPV4,
3163                  data_length +
3164                  offsetof(struct qeth_ipacmd_setadpparms,
3165                       data));
3166     if (!iob)
3167         return NULL;
3168
3169     hdr = &__ipa_cmd(iob)->data.setadapterparms.hdr;
3170     hdr->cmdlength = sizeof(*hdr) + data_length;
3171     hdr->command_code = adp_cmd;
3172     hdr->used_total = 1;
3173     hdr->seq_no = 1;
3174     return iob;
3175 }
3176
3177 static int qeth_query_setadapterparms(struct qeth_card *card)
3178 {
3179     int rc;
3180     struct qeth_cmd_buffer *iob;
3181
3182     QETH_CARD_TEXT(card, 3, "queryadp");
3183     iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
3184                    SETADP_DATA_SIZEOF(query_cmds_supp));
3185     if (!iob)
3186         return -ENOMEM;
3187     rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
3188     return rc;
3189 }
3190
3191 static int qeth_query_ipassists_cb(struct qeth_card *card,
3192         struct qeth_reply *reply, unsigned long data)
3193 {
3194     struct qeth_ipa_cmd *cmd;
3195
3196     QETH_CARD_TEXT(card, 2, "qipasscb");
3197
3198     cmd = (struct qeth_ipa_cmd *) data;
3199
3200     switch (cmd->hdr.return_code) {
3201     case IPA_RC_SUCCESS:
3202         break;
3203     case IPA_RC_NOTSUPP:
3204     case IPA_RC_L2_UNSUPPORTED_CMD:
3205         QETH_CARD_TEXT(card, 2, "ipaunsup");
3206         card->options.ipa4.supported |= IPA_SETADAPTERPARMS;
3207         card->options.ipa6.supported |= IPA_SETADAPTERPARMS;
3208         return -EOPNOTSUPP;
3209     default:
3210         QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n",
3211                  CARD_DEVID(card), cmd->hdr.return_code);
3212         return -EIO;
3213     }
3214
3215     if (cmd->hdr.prot_version == QETH_PROT_IPV4)
3216         card->options.ipa4 = cmd->hdr.assists;
3217     else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
3218         card->options.ipa6 = cmd->hdr.assists;
3219     else
3220         QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n",
3221                  CARD_DEVID(card));
3222     return 0;
3223 }
3224
3225 static int qeth_query_ipassists(struct qeth_card *card,
3226                 enum qeth_prot_versions prot)
3227 {
3228     int rc;
3229     struct qeth_cmd_buffer *iob;
3230
3231     QETH_CARD_TEXT_(card, 2, "qipassi%i", prot);
3232     iob = qeth_ipa_alloc_cmd(card, IPA_CMD_QIPASSIST, prot, 0);
3233     if (!iob)
3234         return -ENOMEM;
3235     rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
3236     return rc;
3237 }
3238
3239 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
3240                 struct qeth_reply *reply, unsigned long data)
3241 {
3242     struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3243     struct qeth_query_switch_attributes *attrs;
3244     struct qeth_switch_info *sw_info;
3245
3246     QETH_CARD_TEXT(card, 2, "qswiatcb");
3247     if (qeth_setadpparms_inspect_rc(cmd))
3248         return -EIO;
3249
3250     sw_info = (struct qeth_switch_info *)reply->param;
3251     attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3252     sw_info->capabilities = attrs->capabilities;
3253     sw_info->settings = attrs->settings;
3254     QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3255             sw_info->settings);
3256     return 0;
3257 }
3258
3259 int qeth_query_switch_attributes(struct qeth_card *card,
3260                  struct qeth_switch_info *sw_info)
3261 {
3262     struct qeth_cmd_buffer *iob;
3263
3264     QETH_CARD_TEXT(card, 2, "qswiattr");
3265     if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3266         return -EOPNOTSUPP;
3267     if (!netif_carrier_ok(card->dev))
3268         return -ENOMEDIUM;
3269     iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES, 0);
3270     if (!iob)
3271         return -ENOMEM;
3272     return qeth_send_ipa_cmd(card, iob,
3273                 qeth_query_switch_attributes_cb, sw_info);
3274 }
3275
3276 struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card,
3277                       enum qeth_diags_cmds sub_cmd,
3278                       unsigned int data_length)
3279 {
3280     struct qeth_ipacmd_diagass *cmd;
3281     struct qeth_cmd_buffer *iob;
3282
3283     iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SET_DIAG_ASS, QETH_PROT_NONE,
3284                  DIAG_HDR_LEN + data_length);
3285     if (!iob)
3286         return NULL;
3287
3288     cmd = &__ipa_cmd(iob)->data.diagass;
3289     cmd->subcmd_len = DIAG_SUB_HDR_LEN + data_length;
3290     cmd->subcmd = sub_cmd;
3291     return iob;
3292 }
3293 EXPORT_SYMBOL_GPL(qeth_get_diag_cmd);
3294
3295 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3296         struct qeth_reply *reply, unsigned long data)
3297 {
3298     struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3299     u16 rc = cmd->hdr.return_code;
3300
3301     if (rc) {
3302         QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3303         return -EIO;
3304     }
3305
3306     card->info.diagass_support = cmd->data.diagass.ext;
3307     return 0;
3308 }
3309
3310 static int qeth_query_setdiagass(struct qeth_card *card)
3311 {
3312     struct qeth_cmd_buffer *iob;
3313
3314     QETH_CARD_TEXT(card, 2, "qdiagass");
3315     iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_QUERY, 0);
3316     if (!iob)
3317         return -ENOMEM;
3318     return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3319 }
3320
3321 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3322 {
3323     unsigned long info = get_zeroed_page(GFP_KERNEL);
3324     struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3325     struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3326     struct ccw_dev_id ccwid;
3327     int level;
3328
3329     tid->chpid = card->info.chpid;
3330     ccw_device_get_id(CARD_RDEV(card), &ccwid);
3331     tid->ssid = ccwid.ssid;
3332     tid->devno = ccwid.devno;
3333     if (!info)
3334         return;
3335     level = stsi(NULL, 0, 0, 0);
3336     if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3337         tid->lparnr = info222->lpar_number;
3338     if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3339         EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3340         memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3341     }
3342     free_page(info);
3343 }
3344
3345 static int qeth_hw_trap_cb(struct qeth_card *card,
3346         struct qeth_reply *reply, unsigned long data)
3347 {
3348     struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3349     u16 rc = cmd->hdr.return_code;
3350
3351     if (rc) {
3352         QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3353         return -EIO;
3354     }
3355     return 0;
3356 }
3357
3358 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3359 {
3360     struct qeth_cmd_buffer *iob;
3361     struct qeth_ipa_cmd *cmd;
3362
3363     QETH_CARD_TEXT(card, 2, "diagtrap");
3364     iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRAP, 64);
3365     if (!iob)
3366         return -ENOMEM;
3367     cmd = __ipa_cmd(iob);
3368     cmd->data.diagass.type = 1;
3369     cmd->data.diagass.action = action;
3370     switch (action) {
3371     case QETH_DIAGS_TRAP_ARM:
3372         cmd->data.diagass.options = 0x0003;
3373         cmd->data.diagass.ext = 0x00010000 +
3374             sizeof(struct qeth_trap_id);
3375         qeth_get_trap_id(card,
3376             (struct qeth_trap_id *)cmd->data.diagass.cdata);
3377         break;
3378     case QETH_DIAGS_TRAP_DISARM:
3379         cmd->data.diagass.options = 0x0001;
3380         break;
3381     case QETH_DIAGS_TRAP_CAPTURE:
3382         break;
3383     }
3384     return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3385 }
3386
3387 static int qeth_check_qdio_errors(struct qeth_card *card,
3388                   struct qdio_buffer *buf,
3389                   unsigned int qdio_error,
3390                   const char *dbftext)
3391 {
3392     if (qdio_error) {
3393         QETH_CARD_TEXT(card, 2, dbftext);
3394         QETH_CARD_TEXT_(card, 2, " F15=%02X",
3395                    buf->element[15].sflags);
3396         QETH_CARD_TEXT_(card, 2, " F14=%02X",
3397                    buf->element[14].sflags);
3398         QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3399         if ((buf->element[15].sflags) == 0x12) {
3400             QETH_CARD_STAT_INC(card, rx_fifo_errors);
3401             return 0;
3402         } else
3403             return 1;
3404     }
3405     return 0;
3406 }
3407
3408 static unsigned int qeth_rx_refill_queue(struct qeth_card *card,
3409                      unsigned int count)
3410 {
3411     struct qeth_qdio_q *queue = card->qdio.in_q;
3412     struct list_head *lh;
3413     int i;
3414     int rc;
3415     int newcount = 0;
3416
3417     /* only requeue at a certain threshold to avoid SIGAs */
3418     if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3419         for (i = queue->next_buf_to_init;
3420              i < queue->next_buf_to_init + count; ++i) {
3421             if (qeth_init_input_buffer(card,
3422                 &queue->bufs[QDIO_BUFNR(i)])) {
3423                 break;
3424             } else {
3425                 newcount++;
3426             }
3427         }
3428
3429         if (newcount < count) {
3430             /* we are in memory shortage so we switch back to
3431                traditional skb allocation and drop packages */
3432             atomic_set(&card->force_alloc_skb, 3);
3433             count = newcount;
3434         } else {
3435             atomic_add_unless(&card->force_alloc_skb, -1, 0);
3436         }
3437
3438         if (!count) {
3439             i = 0;
3440             list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3441                 i++;
3442             if (i == card->qdio.in_buf_pool.buf_count) {
3443                 QETH_CARD_TEXT(card, 2, "qsarbw");
3444                 schedule_delayed_work(
3445                     &card->buffer_reclaim_work,
3446                     QETH_RECLAIM_WORK_TIME);
3447             }
3448             return 0;
3449         }
3450
3451         rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), 0,
3452                           queue->next_buf_to_init,
3453                           count);
3454         if (rc) {
3455             QETH_CARD_TEXT(card, 2, "qinberr");
3456         }
3457         queue->next_buf_to_init = QDIO_BUFNR(queue->next_buf_to_init +
3458                              count);
3459         return count;
3460     }
3461
3462     return 0;
3463 }
3464
3465 static void qeth_buffer_reclaim_work(struct work_struct *work)
3466 {
3467     struct qeth_card *card = container_of(to_delayed_work(work),
3468                           struct qeth_card,
3469                           buffer_reclaim_work);
3470
3471     local_bh_disable();
3472     napi_schedule(&card->napi);
3473     /* kick-start the NAPI softirq: */
3474     local_bh_enable();
3475 }
3476
3477 static void qeth_handle_send_error(struct qeth_card *card,
3478         struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3479 {
3480     int sbalf15 = buffer->buffer->element[15].sflags;
3481
3482     QETH_CARD_TEXT(card, 6, "hdsnderr");
3483     qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3484
3485     if (!qdio_err)
3486         return;
3487
3488     if ((sbalf15 >= 15) && (sbalf15 <= 31))
3489         return;
3490
3491     QETH_CARD_TEXT(card, 1, "lnkfail");
3492     QETH_CARD_TEXT_(card, 1, "%04x %02x",
3493                (u16)qdio_err, (u8)sbalf15);
3494 }
3495
3496 /**
3497  * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3498  * @queue: queue to check for packing buffer
3499  *
3500  * Returns number of buffers that were prepared for flush.
3501  */
3502 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3503 {
3504     struct qeth_qdio_out_buffer *buffer;
3505
3506     buffer = queue->bufs[queue->next_buf_to_fill];
3507     if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3508         (buffer->next_element_to_fill > 0)) {
3509         /* it's a packing buffer */
3510         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3511         queue->next_buf_to_fill =
3512             QDIO_BUFNR(queue->next_buf_to_fill + 1);
3513         return 1;
3514     }
3515     return 0;
3516 }
3517
3518 /*
3519  * Switched to packing state if the number of used buffers on a queue
3520  * reaches a certain limit.
3521  */
3522 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3523 {
3524     if (!queue->do_pack) {
3525         if (atomic_read(&queue->used_buffers)
3526             >= QETH_HIGH_WATERMARK_PACK){
3527             /* switch non-PACKING -> PACKING */
3528             QETH_CARD_TEXT(queue->card, 6, "np->pack");
3529             QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3530             queue->do_pack = 1;
3531         }
3532     }
3533 }
3534
3535 /*
3536  * Switches from packing to non-packing mode. If there is a packing
3537  * buffer on the queue this buffer will be prepared to be flushed.
3538  * In that case 1 is returned to inform the caller. If no buffer
3539  * has to be flushed, zero is returned.
3540  */
3541 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3542 {
3543     if (queue->do_pack) {
3544         if (atomic_read(&queue->used_buffers)
3545             <= QETH_LOW_WATERMARK_PACK) {
3546             /* switch PACKING -> non-PACKING */
3547             QETH_CARD_TEXT(queue->card, 6, "pack->np");
3548             QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3549             queue->do_pack = 0;
3550             return qeth_prep_flush_pack_buffer(queue);
3551         }
3552     }
3553     return 0;
3554 }
3555
3556 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3557                    int count)
3558 {
3559     struct qeth_qdio_out_buffer *buf = queue->bufs[index];
3560     struct qeth_card *card = queue->card;
3561     unsigned int frames, usecs;
3562     struct qaob *aob = NULL;
3563     int rc;
3564     int i;
3565
3566     for (i = index; i < index + count; ++i) {
3567         unsigned int bidx = QDIO_BUFNR(i);
3568         struct sk_buff *skb;
3569
3570         buf = queue->bufs[bidx];
3571         buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3572                 SBAL_EFLAGS_LAST_ENTRY;
3573         queue->coalesced_frames += buf->frames;
3574
3575         if (IS_IQD(card)) {
3576             skb_queue_walk(&buf->skb_list, skb)
3577                 skb_tx_timestamp(skb);
3578         }
3579     }
3580
3581     if (IS_IQD(card)) {
3582         if (card->options.cq == QETH_CQ_ENABLED &&
3583             !qeth_iqd_is_mcast_queue(card, queue) &&
3584             count == 1) {
3585             if (!buf->aob)
3586                 buf->aob = kmem_cache_zalloc(qeth_qaob_cache,
3587                                  GFP_ATOMIC);
3588             if (buf->aob) {
3589                 struct qeth_qaob_priv1 *priv;
3590
3591                 aob = buf->aob;
3592                 priv = (struct qeth_qaob_priv1 *)&aob->user1;
3593                 priv->state = QETH_QAOB_ISSUED;
3594                 priv->queue_no = queue->queue_no;
3595             }
3596         }
3597     } else {
3598         if (!queue->do_pack) {
3599             if ((atomic_read(&queue->used_buffers) >=
3600                 (QETH_HIGH_WATERMARK_PACK -
3601                  QETH_WATERMARK_PACK_FUZZ)) &&
3602                 !atomic_read(&queue->set_pci_flags_count)) {
3603                 /* it's likely that we'll go to packing
3604                  * mode soon */
3605                 atomic_inc(&queue->set_pci_flags_count);
3606                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3607             }
3608         } else {
3609             if (!atomic_read(&queue->set_pci_flags_count)) {
3610                 /*
3611                  * there's no outstanding PCI any more, so we
3612                  * have to request a PCI to be sure the PCI
3613                  * will wake at some time in the future then we
3614                  * can flush packed buffers that might still be
3615                  * hanging around, which can happen if no
3616                  * further send was requested by the stack
3617                  */
3618                 atomic_inc(&queue->set_pci_flags_count);
3619                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3620             }
3621         }
3622     }
3623
3624     QETH_TXQ_STAT_INC(queue, doorbell);
3625     rc = qdio_add_bufs_to_output_queue(CARD_DDEV(card), queue->queue_no,
3626                        index, count, aob);
3627
3628     switch (rc) {
3629     case 0:
3630     case -ENOBUFS:
3631         /* ignore temporary SIGA errors without busy condition */
3632
3633         /* Fake the TX completion interrupt: */
3634         frames = READ_ONCE(queue->max_coalesced_frames);
3635         usecs = READ_ONCE(queue->coalesce_usecs);
3636
3637         if (frames && queue->coalesced_frames >= frames) {
3638             napi_schedule(&queue->napi);
3639             queue->coalesced_frames = 0;
3640             QETH_TXQ_STAT_INC(queue, coal_frames);
3641         } else if (qeth_use_tx_irqs(card) &&
3642                atomic_read(&queue->used_buffers) >= 32) {
3643             /* Old behaviour carried over from the qdio layer: */
3644             napi_schedule(&queue->napi);
3645             QETH_TXQ_STAT_INC(queue, coal_frames);
3646         } else if (usecs) {
3647             qeth_tx_arm_timer(queue, usecs);
3648         }
3649
3650         break;
3651     default:
3652         QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3653         QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3654         QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3655         QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3656         QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3657
3658         /* this must not happen under normal circumstances. if it
3659          * happens something is really wrong -> recover */
3660         qeth_schedule_recovery(queue->card);
3661     }
3662 }
3663
3664 static void qeth_flush_queue(struct qeth_qdio_out_q *queue)
3665 {
3666     qeth_flush_buffers(queue, queue->bulk_start, queue->bulk_count);
3667
3668     queue->bulk_start = QDIO_BUFNR(queue->bulk_start + queue->bulk_count);
3669     queue->prev_hdr = NULL;
3670     queue->bulk_count = 0;
3671 }
3672
3673 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3674 {
3675     /*
3676      * check if weed have to switch to non-packing mode or if
3677      * we have to get a pci flag out on the queue
3678      */
3679     if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3680         !atomic_read(&queue->set_pci_flags_count)) {
3681         unsigned int index, flush_cnt;
3682
3683         spin_lock(&queue->lock);
3684
3685         index = queue->next_buf_to_fill;
3686
3687         flush_cnt = qeth_switch_to_nonpacking_if_needed(queue);
3688         if (!flush_cnt && !atomic_read(&queue->set_pci_flags_count))
3689             flush_cnt = qeth_prep_flush_pack_buffer(queue);
3690
3691         if (flush_cnt) {
3692             qeth_flush_buffers(queue, index, flush_cnt);
3693             QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt);
3694         }
3695
3696         spin_unlock(&queue->lock);
3697     }
3698 }
3699
3700 static void qeth_qdio_poll(struct ccw_device *cdev, unsigned long card_ptr)
3701 {
3702     struct qeth_card *card = (struct qeth_card *)card_ptr;
3703
3704     napi_schedule_irqoff(&card->napi);
3705 }
3706
3707 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3708 {
3709     int rc;
3710
3711     if (card->options.cq ==  QETH_CQ_NOTAVAILABLE) {
3712         rc = -1;
3713         goto out;
3714     } else {
3715         if (card->options.cq == cq) {
3716             rc = 0;
3717             goto out;
3718         }
3719
3720         qeth_free_qdio_queues(card);
3721         card->options.cq = cq;
3722         rc = 0;
3723     }
3724 out:
3725     return rc;
3726
3727 }
3728 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3729
3730 static void qeth_qdio_handle_aob(struct qeth_card *card, struct qaob *aob)
3731 {
3732     struct qeth_qaob_priv1 *priv = (struct qeth_qaob_priv1 *)&aob->user1;
3733     unsigned int queue_no = priv->queue_no;
3734
3735     BUILD_BUG_ON(sizeof(*priv) > ARRAY_SIZE(aob->user1));
3736
3737     if (xchg(&priv->state, QETH_QAOB_DONE) == QETH_QAOB_PENDING &&
3738         queue_no < card->qdio.no_out_queues)
3739         napi_schedule(&card->qdio.out_qs[queue_no]->napi);
3740 }
3741
3742 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
3743                  unsigned int queue, int first_element,
3744                  int count)
3745 {
3746     struct qeth_qdio_q *cq = card->qdio.c_q;
3747     int i;
3748     int rc;
3749
3750     QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3751     QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3752     QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3753
3754     if (qdio_err) {
3755         netif_tx_stop_all_queues(card->dev);
3756         qeth_schedule_recovery(card);
3757         return;
3758     }
3759
3760     for (i = first_element; i < first_element + count; ++i) {
3761         struct qdio_buffer *buffer = cq->qdio_bufs[QDIO_BUFNR(i)];
3762         int e = 0;
3763
3764         while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3765                buffer->element[e].addr) {
3766             unsigned long phys_aob_addr = buffer->element[e].addr;
3767
3768             qeth_qdio_handle_aob(card, phys_to_virt(phys_aob_addr));
3769             ++e;
3770         }
3771         qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
3772     }
3773     rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), queue,
3774                       cq->next_buf_to_init, count);
3775     if (rc) {
3776         dev_warn(&card->gdev->dev,
3777             "QDIO reported an error, rc=%i\n", rc);
3778         QETH_CARD_TEXT(card, 2, "qcqherr");
3779     }
3780
3781     cq->next_buf_to_init = QDIO_BUFNR(cq->next_buf_to_init + count);
3782 }
3783
3784 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3785                     unsigned int qdio_err, int queue,
3786                     int first_elem, int count,
3787                     unsigned long card_ptr)
3788 {
3789     struct qeth_card *card = (struct qeth_card *)card_ptr;
3790
3791     QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3792     QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3793
3794     if (qdio_err)
3795         qeth_schedule_recovery(card);
3796 }
3797
3798 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3799                      unsigned int qdio_error, int __queue,
3800                      int first_element, int count,
3801                      unsigned long card_ptr)
3802 {
3803     struct qeth_card *card        = (struct qeth_card *) card_ptr;
3804
3805     QETH_CARD_TEXT(card, 2, "achkcond");
3806     netif_tx_stop_all_queues(card->dev);
3807     qeth_schedule_recovery(card);
3808 }
3809
3810 /*
3811  * Note: Function assumes that we have 4 outbound queues.
3812  */
3813 static int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
3814 {
3815     struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
3816     u8 tos;
3817
3818     switch (card->qdio.do_prio_queueing) {
3819     case QETH_PRIO_Q_ING_TOS:
3820     case QETH_PRIO_Q_ING_PREC:
3821         switch (vlan_get_protocol(skb)) {
3822         case htons(ETH_P_IP):
3823             tos = ipv4_get_dsfield(ip_hdr(skb));
3824             break;
3825         case htons(ETH_P_IPV6):
3826             tos = ipv6_get_dsfield(ipv6_hdr(skb));
3827             break;
3828         default:
3829             return card->qdio.default_out_queue;
3830         }
3831         if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3832             return ~tos >> 6 & 3;
3833         if (tos & IPTOS_MINCOST)
3834             return 3;
3835         if (tos & IPTOS_RELIABILITY)
3836             return 2;
3837         if (tos & IPTOS_THROUGHPUT)
3838             return 1;
3839         if (tos & IPTOS_LOWDELAY)
3840             return 0;
3841         break;
3842     case QETH_PRIO_Q_ING_SKB:
3843         if (skb->priority > 5)
3844             return 0;
3845         return ~skb->priority >> 1 & 3;
3846     case QETH_PRIO_Q_ING_VLAN:
3847         if (veth->h_vlan_proto == htons(ETH_P_8021Q))
3848             return ~ntohs(veth->h_vlan_TCI) >>
3849                    (VLAN_PRIO_SHIFT + 1) & 3;
3850         break;
3851     case QETH_PRIO_Q_ING_FIXED:
3852         return card->qdio.default_out_queue;
3853     default:
3854         break;
3855     }
3856     return card->qdio.default_out_queue;
3857 }
3858
3859 /**
3860  * qeth_get_elements_for_frags() -  find number of SBALEs for skb frags.
3861  * @skb:                SKB address
3862  *
3863  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3864  * fragmented part of the SKB. Returns zero for linear SKB.
3865  */
3866 static int qeth_get_elements_for_frags(struct sk_buff *skb)
3867 {
3868     int cnt, elements = 0;
3869
3870     for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3871         skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3872
3873         elements += qeth_get_elements_for_range(
3874             (addr_t)skb_frag_address(frag),
3875             (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3876     }
3877     return elements;
3878 }
3879
3880 /**
3881  * qeth_count_elements() -  Counts the number of QDIO buffer elements needed
3882  *              to transmit an skb.
3883  * @skb:            the skb to operate on.
3884  * @data_offset:        skip this part of the skb's linear data
3885  *
3886  * Returns the number of pages, and thus QDIO buffer elements, needed to map the
3887  * skb's data (both its linear part and paged fragments).
3888  */
3889 static unsigned int qeth_count_elements(struct sk_buff *skb,
3890                     unsigned int data_offset)
3891 {
3892     unsigned int elements = qeth_get_elements_for_frags(skb);
3893     addr_t end = (addr_t)skb->data + skb_headlen(skb);
3894     addr_t start = (addr_t)skb->data + data_offset;
3895
3896     if (start != end)
3897         elements += qeth_get_elements_for_range(start, end);
3898     return elements;
3899 }
3900
3901 #define QETH_HDR_CACHE_OBJ_SIZE     (sizeof(struct qeth_hdr_tso) + \
3902                      MAX_TCP_HEADER)
3903
3904 /**
3905  * qeth_add_hw_header() - add a HW header to an skb.
3906  * @queue: TX queue that the skb will be placed on.
3907  * @skb: skb that the HW header should be added to.
3908  * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3909  *   it contains a valid pointer to a qeth_hdr.
3910  * @hdr_len: length of the HW header.
3911  * @proto_len: length of protocol headers that need to be in same page as the
3912  *         HW header.
3913  * @elements: returns the required number of buffer elements for this skb.
3914  *
3915  * Returns the pushed length. If the header can't be pushed on
3916  * (eg. because it would cross a page boundary), it is allocated from
3917  * the cache instead and 0 is returned.
3918  * The number of needed buffer elements is returned in @elements.
3919  * Error to create the hdr is indicated by returning with < 0.
3920  */
3921 static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
3922                   struct sk_buff *skb, struct qeth_hdr **hdr,
3923                   unsigned int hdr_len, unsigned int proto_len,
3924                   unsigned int *elements)
3925 {
3926     gfp_t gfp = GFP_ATOMIC | (skb_pfmemalloc(skb) ? __GFP_MEMALLOC : 0);
3927     const unsigned int contiguous = proto_len ? proto_len : 1;
3928     const unsigned int max_elements = queue->max_elements;
3929     unsigned int __elements;
3930     addr_t start, end;
3931     bool push_ok;
3932     int rc;
3933
3934 check_layout:
3935     start = (addr_t)skb->data - hdr_len;
3936     end = (addr_t)skb->data;
3937
3938     if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
3939         /* Push HW header into same page as first protocol header. */
3940         push_ok = true;
3941         /* ... but TSO always needs a separate element for headers: */
3942         if (skb_is_gso(skb))
3943             __elements = 1 + qeth_count_elements(skb, proto_len);
3944         else
3945             __elements = qeth_count_elements(skb, 0);
3946     } else if (!proto_len && PAGE_ALIGNED(skb->data)) {
3947         /* Push HW header into preceding page, flush with skb->data. */
3948         push_ok = true;
3949         __elements = 1 + qeth_count_elements(skb, 0);
3950     } else {
3951         /* Use header cache, copy protocol headers up. */
3952         push_ok = false;
3953         __elements = 1 + qeth_count_elements(skb, proto_len);
3954     }
3955
3956     /* Compress skb to fit into one IO buffer: */
3957     if (__elements > max_elements) {
3958         if (!skb_is_nonlinear(skb)) {
3959             /* Drop it, no easy way of shrinking it further. */
3960             QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
3961                      max_elements, __elements, skb->len);
3962             return -E2BIG;
3963         }
3964
3965         rc = skb_linearize(skb);
3966         if (rc) {
3967             QETH_TXQ_STAT_INC(queue, skbs_linearized_fail);
3968             return rc;
3969         }
3970
3971         QETH_TXQ_STAT_INC(queue, skbs_linearized);
3972         /* Linearization changed the layout, re-evaluate: */
3973         goto check_layout;
3974     }
3975
3976     *elements = __elements;
3977     /* Add the header: */
3978     if (push_ok) {
3979         *hdr = skb_push(skb, hdr_len);
3980         return hdr_len;
3981     }
3982
3983     /* Fall back to cache element with known-good alignment: */
3984     if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
3985         return -E2BIG;
3986     *hdr = kmem_cache_alloc(qeth_core_header_cache, gfp);
3987     if (!*hdr)
3988         return -ENOMEM;
3989     /* Copy protocol headers behind HW header: */
3990     skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
3991     return 0;
3992 }
3993
3994 static bool qeth_iqd_may_bulk(struct qeth_qdio_out_q *queue,
3995                   struct sk_buff *curr_skb,
3996                   struct qeth_hdr *curr_hdr)
3997 {
3998     struct qeth_qdio_out_buffer *buffer = queue->bufs[queue->bulk_start];
3999     struct qeth_hdr *prev_hdr = queue->prev_hdr;
4000
4001     if (!prev_hdr)
4002         return true;
4003
4004     /* All packets must have the same target: */
4005     if (curr_hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) {
4006         struct sk_buff *prev_skb = skb_peek(&buffer->skb_list);
4007
4008         return ether_addr_equal(eth_hdr(prev_skb)->h_dest,
4009                     eth_hdr(curr_skb)->h_dest) &&
4010                qeth_l2_same_vlan(&prev_hdr->hdr.l2, &curr_hdr->hdr.l2);
4011     }
4012
4013     return qeth_l3_same_next_hop(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3) &&
4014            qeth_l3_iqd_same_vlan(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3);
4015 }
4016
4017 /**
4018  * qeth_fill_buffer() - map skb into an output buffer
4019  * @buf:    buffer to transport the skb
4020  * @skb:    skb to map into the buffer
4021  * @hdr:    qeth_hdr for this skb. Either at skb->data, or allocated
4022  *      from qeth_core_header_cache.
4023  * @offset: when mapping the skb, start at skb->data + offset
4024  * @hd_len: if > 0, build a dedicated header element of this size
4025  */
4026 static unsigned int qeth_fill_buffer(struct qeth_qdio_out_buffer *buf,
4027                      struct sk_buff *skb, struct qeth_hdr *hdr,
4028                      unsigned int offset, unsigned int hd_len)
4029 {
4030     struct qdio_buffer *buffer = buf->buffer;
4031     int element = buf->next_element_to_fill;
4032     int length = skb_headlen(skb) - offset;
4033     char *data = skb->data + offset;
4034     unsigned int elem_length, cnt;
4035     bool is_first_elem = true;
4036
4037     __skb_queue_tail(&buf->skb_list, skb);
4038
4039     /* build dedicated element for HW Header */
4040     if (hd_len) {
4041         is_first_elem = false;
4042
4043         buffer->element[element].addr = virt_to_phys(hdr);
4044         buffer->element[element].length = hd_len;
4045         buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
4046
4047         /* HW header is allocated from cache: */
4048         if ((void *)hdr != skb->data)
4049             __set_bit(element, buf->from_kmem_cache);
4050         /* HW header was pushed and is contiguous with linear part: */
4051         else if (length > 0 && !PAGE_ALIGNED(data) &&
4052              (data == (char *)hdr + hd_len))
4053             buffer->element[element].eflags |=
4054                 SBAL_EFLAGS_CONTIGUOUS;
4055
4056         element++;
4057     }
4058
4059     /* map linear part into buffer element(s) */
4060     while (length > 0) {
4061         elem_length = min_t(unsigned int, length,
4062                     PAGE_SIZE - offset_in_page(data));
4063
4064         buffer->element[element].addr = virt_to_phys(data);
4065         buffer->element[element].length = elem_length;
4066         length -= elem_length;
4067         if (is_first_elem) {
4068             is_first_elem = false;
4069             if (length || skb_is_nonlinear(skb))
4070                 /* skb needs additional elements */
4071                 buffer->element[element].eflags =
4072                     SBAL_EFLAGS_FIRST_FRAG;
4073             else
4074                 buffer->element[element].eflags = 0;
4075         } else {
4076             buffer->element[element].eflags =
4077                 SBAL_EFLAGS_MIDDLE_FRAG;
4078         }
4079
4080         data += elem_length;
4081         element++;
4082     }
4083
4084     /* map page frags into buffer element(s) */
4085     for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
4086         skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
4087
4088         data = skb_frag_address(frag);
4089         length = skb_frag_size(frag);
4090         while (length > 0) {
4091             elem_length = min_t(unsigned int, length,
4092                         PAGE_SIZE - offset_in_page(data));
4093
4094             buffer->element[element].addr = virt_to_phys(data);
4095             buffer->element[element].length = elem_length;
4096             buffer->element[element].eflags =
4097                 SBAL_EFLAGS_MIDDLE_FRAG;
4098
4099             length -= elem_length;
4100             data += elem_length;
4101             element++;
4102         }
4103     }
4104
4105     if (buffer->element[element - 1].eflags)
4106         buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
4107     buf->next_element_to_fill = element;
4108     return element;
4109 }
4110
4111 static int __qeth_xmit(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4112                struct sk_buff *skb, unsigned int elements,
4113                struct qeth_hdr *hdr, unsigned int offset,
4114                unsigned int hd_len)
4115 {
4116     unsigned int bytes = qdisc_pkt_len(skb);
4117     struct qeth_qdio_out_buffer *buffer;
4118     unsigned int next_element;
4119     struct netdev_queue *txq;
4120     bool stopped = false;
4121     bool flush;
4122
4123     buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start + queue->bulk_count)];
4124     txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4125
4126     /* Just a sanity check, the wake/stop logic should ensure that we always
4127      * get a free buffer.
4128      */
4129     if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4130         return -EBUSY;
4131
4132     flush = !qeth_iqd_may_bulk(queue, skb, hdr);
4133
4134     if (flush ||
4135         (buffer->next_element_to_fill + elements > queue->max_elements)) {
4136         if (buffer->next_element_to_fill > 0) {
4137             atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4138             queue->bulk_count++;
4139         }
4140
4141         if (queue->bulk_count >= queue->bulk_max)
4142             flush = true;
4143
4144         if (flush)
4145             qeth_flush_queue(queue);
4146
4147         buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start +
4148                         queue->bulk_count)];
4149
4150         /* Sanity-check again: */
4151         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4152             return -EBUSY;
4153     }
4154
4155     if (buffer->next_element_to_fill == 0 &&
4156         atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4157         /* If a TX completion happens right _here_ and misses to wake
4158          * the txq, then our re-check below will catch the race.
4159          */
4160         QETH_TXQ_STAT_INC(queue, stopped);
4161         netif_tx_stop_queue(txq);
4162         stopped = true;
4163     }
4164
4165     next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4166     buffer->bytes += bytes;
4167     buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4168     queue->prev_hdr = hdr;
4169
4170     flush = __netdev_tx_sent_queue(txq, bytes,
4171                        !stopped && netdev_xmit_more());
4172
4173     if (flush || next_element >= queue->max_elements) {
4174         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4175         queue->bulk_count++;
4176
4177         if (queue->bulk_count >= queue->bulk_max)
4178             flush = true;
4179
4180         if (flush)
4181             qeth_flush_queue(queue);
4182     }
4183
4184     if (stopped && !qeth_out_queue_is_full(queue))
4185         netif_tx_start_queue(txq);
4186     return 0;
4187 }
4188
4189 static int qeth_do_send_packet(struct qeth_card *card,
4190                    struct qeth_qdio_out_q *queue,
4191                    struct sk_buff *skb, struct qeth_hdr *hdr,
4192                    unsigned int offset, unsigned int hd_len,
4193                    unsigned int elements_needed)
4194 {
4195     unsigned int start_index = queue->next_buf_to_fill;
4196     struct qeth_qdio_out_buffer *buffer;
4197     unsigned int next_element;
4198     struct netdev_queue *txq;
4199     bool stopped = false;
4200     int flush_count = 0;
4201     int do_pack = 0;
4202     int rc = 0;
4203
4204     buffer = queue->bufs[queue->next_buf_to_fill];
4205
4206     /* Just a sanity check, the wake/stop logic should ensure that we always
4207      * get a free buffer.
4208      */
4209     if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4210         return -EBUSY;
4211
4212     txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4213
4214     /* check if we need to switch packing state of this queue */
4215     qeth_switch_to_packing_if_needed(queue);
4216     if (queue->do_pack) {
4217         do_pack = 1;
4218         /* does packet fit in current buffer? */
4219         if (buffer->next_element_to_fill + elements_needed >
4220             queue->max_elements) {
4221             /* ... no -> set state PRIMED */
4222             atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4223             flush_count++;
4224             queue->next_buf_to_fill =
4225                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4226             buffer = queue->bufs[queue->next_buf_to_fill];
4227
4228             /* We stepped forward, so sanity-check again: */
4229             if (atomic_read(&buffer->state) !=
4230                 QETH_QDIO_BUF_EMPTY) {
4231                 qeth_flush_buffers(queue, start_index,
4232                                flush_count);
4233                 rc = -EBUSY;
4234                 goto out;
4235             }
4236         }
4237     }
4238
4239     if (buffer->next_element_to_fill == 0 &&
4240         atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4241         /* If a TX completion happens right _here_ and misses to wake
4242          * the txq, then our re-check below will catch the race.
4243          */
4244         QETH_TXQ_STAT_INC(queue, stopped);
4245         netif_tx_stop_queue(txq);
4246         stopped = true;
4247     }
4248
4249     next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4250     buffer->bytes += qdisc_pkt_len(skb);
4251     buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4252
4253     if (queue->do_pack)
4254         QETH_TXQ_STAT_INC(queue, skbs_pack);
4255     if (!queue->do_pack || stopped || next_element >= queue->max_elements) {
4256         flush_count++;
4257         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4258         queue->next_buf_to_fill =
4259                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4260     }
4261
4262     if (flush_count)
4263         qeth_flush_buffers(queue, start_index, flush_count);
4264
4265 out:
4266     if (do_pack)
4267         QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count);
4268
4269     if (stopped && !qeth_out_queue_is_full(queue))
4270         netif_tx_start_queue(txq);
4271     return rc;
4272 }
4273
4274 static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr,
4275                   unsigned int payload_len, struct sk_buff *skb,
4276                   unsigned int proto_len)
4277 {
4278     struct qeth_hdr_ext_tso *ext = &hdr->ext;
4279
4280     ext->hdr_tot_len = sizeof(*ext);
4281     ext->imb_hdr_no = 1;
4282     ext->hdr_type = 1;
4283     ext->hdr_version = 1;
4284     ext->hdr_len = 28;
4285     ext->payload_len = payload_len;
4286     ext->mss = skb_shinfo(skb)->gso_size;
4287     ext->dg_hdr_len = proto_len;
4288 }
4289
4290 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
4291           struct qeth_qdio_out_q *queue, __be16 proto,
4292           void (*fill_header)(struct qeth_qdio_out_q *queue,
4293                   struct qeth_hdr *hdr, struct sk_buff *skb,
4294                   __be16 proto, unsigned int data_len))
4295 {
4296     unsigned int proto_len, hw_hdr_len;
4297     unsigned int frame_len = skb->len;
4298     bool is_tso = skb_is_gso(skb);
4299     unsigned int data_offset = 0;
4300     struct qeth_hdr *hdr = NULL;
4301     unsigned int hd_len = 0;
4302     unsigned int elements;
4303     int push_len, rc;
4304
4305     if (is_tso) {
4306         hw_hdr_len = sizeof(struct qeth_hdr_tso);
4307         proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4308     } else {
4309         hw_hdr_len = sizeof(struct qeth_hdr);
4310         proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0;
4311     }
4312
4313     rc = skb_cow_head(skb, hw_hdr_len);
4314     if (rc)
4315         return rc;
4316
4317     push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len,
4318                       &elements);
4319     if (push_len < 0)
4320         return push_len;
4321     if (is_tso || !push_len) {
4322         /* HW header needs its own buffer element. */
4323         hd_len = hw_hdr_len + proto_len;
4324         data_offset = push_len + proto_len;
4325     }
4326     memset(hdr, 0, hw_hdr_len);
4327     fill_header(queue, hdr, skb, proto, frame_len);
4328     if (is_tso)
4329         qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
4330                   frame_len - proto_len, skb, proto_len);
4331
4332     if (IS_IQD(card)) {
4333         rc = __qeth_xmit(card, queue, skb, elements, hdr, data_offset,
4334                  hd_len);
4335     } else {
4336         /* TODO: drop skb_orphan() once TX completion is fast enough */
4337         skb_orphan(skb);
4338         spin_lock(&queue->lock);
4339         rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
4340                      hd_len, elements);
4341         spin_unlock(&queue->lock);
4342     }
4343
4344     if (rc && !push_len)
4345         kmem_cache_free(qeth_core_header_cache, hdr);
4346
4347     return rc;
4348 }
4349 EXPORT_SYMBOL_GPL(qeth_xmit);
4350
4351 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4352         struct qeth_reply *reply, unsigned long data)
4353 {
4354     struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4355     struct qeth_ipacmd_setadpparms *setparms;
4356
4357     QETH_CARD_TEXT(card, 4, "prmadpcb");
4358
4359     setparms = &(cmd->data.setadapterparms);
4360     if (qeth_setadpparms_inspect_rc(cmd)) {
4361         QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4362         setparms->data.mode = SET_PROMISC_MODE_OFF;
4363     }
4364     card->info.promisc_mode = setparms->data.mode;
4365     return (cmd->hdr.return_code) ? -EIO : 0;
4366 }
4367
4368 void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable)
4369 {
4370     enum qeth_ipa_promisc_modes mode = enable ? SET_PROMISC_MODE_ON :
4371                             SET_PROMISC_MODE_OFF;
4372     struct qeth_cmd_buffer *iob;
4373     struct qeth_ipa_cmd *cmd;
4374
4375     QETH_CARD_TEXT(card, 4, "setprom");
4376     QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4377
4378     iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4379                    SETADP_DATA_SIZEOF(mode));
4380     if (!iob)
4381         return;
4382     cmd = __ipa_cmd(iob);
4383     cmd->data.setadapterparms.data.mode = mode;
4384     qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4385 }
4386 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4387
4388 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4389         struct qeth_reply *reply, unsigned long data)
4390 {
4391     struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4392     struct qeth_ipacmd_setadpparms *adp_cmd;
4393
4394     QETH_CARD_TEXT(card, 4, "chgmaccb");
4395     if (qeth_setadpparms_inspect_rc(cmd))
4396         return -EIO;
4397
4398     adp_cmd = &cmd->data.setadapterparms;
4399     if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr))
4400         return -EADDRNOTAVAIL;
4401
4402     if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) &&
4403         !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC))
4404         return -EADDRNOTAVAIL;
4405
4406     eth_hw_addr_set(card->dev, adp_cmd->data.change_addr.addr);
4407     return 0;
4408 }
4409
4410 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4411 {
4412     int rc;
4413     struct qeth_cmd_buffer *iob;
4414     struct qeth_ipa_cmd *cmd;
4415
4416     QETH_CARD_TEXT(card, 4, "chgmac");
4417
4418     iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4419                    SETADP_DATA_SIZEOF(change_addr));
4420     if (!iob)
4421         return -ENOMEM;
4422     cmd = __ipa_cmd(iob);
4423     cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4424     cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4425     ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4426             card->dev->dev_addr);
4427     rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4428                    NULL);
4429     return rc;
4430 }
4431 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4432
4433 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4434         struct qeth_reply *reply, unsigned long data)
4435 {
4436     struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4437     struct qeth_set_access_ctrl *access_ctrl_req;
4438
4439     QETH_CARD_TEXT(card, 4, "setaccb");
4440
4441     access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4442     QETH_CARD_TEXT_(card, 2, "rc=%d",
4443             cmd->data.setadapterparms.hdr.return_code);
4444     if (cmd->data.setadapterparms.hdr.return_code !=
4445                         SET_ACCESS_CTRL_RC_SUCCESS)
4446         QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n",
4447                  access_ctrl_req->subcmd_code, CARD_DEVID(card),
4448                  cmd->data.setadapterparms.hdr.return_code);
4449     switch (qeth_setadpparms_inspect_rc(cmd)) {
4450     case SET_ACCESS_CTRL_RC_SUCCESS:
4451         if (access_ctrl_req->subcmd_code == ISOLATION_MODE_NONE)
4452             dev_info(&card->gdev->dev,
4453                 "QDIO data connection isolation is deactivated\n");
4454         else
4455             dev_info(&card->gdev->dev,
4456                 "QDIO data connection isolation is activated\n");
4457         return 0;
4458     case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4459         QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
4460                  CARD_DEVID(card));
4461         return 0;
4462     case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4463         QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
4464                  CARD_DEVID(card));
4465         return 0;
4466     case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4467         dev_err(&card->gdev->dev, "Adapter does not "
4468             "support QDIO data connection isolation\n");
4469         return -EOPNOTSUPP;
4470     case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4471         dev_err(&card->gdev->dev,
4472             "Adapter is dedicated. "
4473             "QDIO data connection isolation not supported\n");
4474         return -EOPNOTSUPP;
4475     case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4476         dev_err(&card->gdev->dev,
4477             "TSO does not permit QDIO data connection isolation\n");
4478         return -EPERM;
4479     case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4480         dev_err(&card->gdev->dev, "The adjacent switch port does not "
4481             "support reflective relay mode\n");
4482         return -EOPNOTSUPP;
4483     case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4484         dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4485                     "enabled at the adjacent switch port");
4486         return -EREMOTEIO;
4487     case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4488         dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4489                     "at the adjacent switch failed\n");
4490         /* benign error while disabling ISOLATION_MODE_FWD */
4491         return 0;
4492     default:
4493         return -EIO;
4494     }
4495 }
4496
4497 int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4498                      enum qeth_ipa_isolation_modes mode)
4499 {
4500     int rc;
4501     struct qeth_cmd_buffer *iob;
4502     struct qeth_ipa_cmd *cmd;
4503     struct qeth_set_access_ctrl *access_ctrl_req;
4504
4505     QETH_CARD_TEXT(card, 4, "setacctl");
4506
4507     if (!qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4508         dev_err(&card->gdev->dev,
4509             "Adapter does not support QDIO data connection isolation\n");
4510         return -EOPNOTSUPP;
4511     }
4512
4513     iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4514                    SETADP_DATA_SIZEOF(set_access_ctrl));
4515     if (!iob)
4516         return -ENOMEM;
4517     cmd = __ipa_cmd(iob);
4518     access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4519     access_ctrl_req->subcmd_code = mode;
4520
4521     rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4522                    NULL);
4523     if (rc) {
4524         QETH_CARD_TEXT_(card, 2, "rc=%d", rc);
4525         QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
4526                  rc, CARD_DEVID(card));
4527     }
4528
4529     return rc;
4530 }
4531
4532 void qeth_tx_timeout(struct net_device *dev, unsigned int txqueue)
4533 {
4534     struct qeth_card *card;
4535
4536     card = dev->ml_priv;
4537     QETH_CARD_TEXT(card, 4, "txtimeo");
4538     qeth_schedule_recovery(card);
4539 }
4540 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4541
4542 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4543 {
4544     struct qeth_card *card = dev->ml_priv;
4545     int rc = 0;
4546
4547     switch (regnum) {
4548     case MII_BMCR: /* Basic mode control register */
4549         rc = BMCR_FULLDPLX;
4550         if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4551             (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) &&
4552             (card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH))
4553             rc |= BMCR_SPEED100;
4554         break;
4555     case MII_BMSR: /* Basic mode status register */
4556         rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4557              BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4558              BMSR_100BASE4;
4559         break;
4560     case MII_PHYSID1: /* PHYS ID 1 */
4561         rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4562              dev->dev_addr[2];
4563         rc = (rc >> 5) & 0xFFFF;
4564         break;
4565     case MII_PHYSID2: /* PHYS ID 2 */
4566         rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4567         break;
4568     case MII_ADVERTISE: /* Advertisement control reg */
4569         rc = ADVERTISE_ALL;
4570         break;
4571     case MII_LPA: /* Link partner ability reg */
4572         rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4573              LPA_100BASE4 | LPA_LPACK;
4574         break;
4575     case MII_EXPANSION: /* Expansion register */
4576         break;
4577     case MII_DCOUNTER: /* disconnect counter */
4578         break;
4579     case MII_FCSCOUNTER: /* false carrier counter */
4580         break;
4581     case MII_NWAYTEST: /* N-way auto-neg test register */
4582         break;
4583     case MII_RERRCOUNTER: /* rx error counter */
4584         rc = card->stats.rx_length_errors +
4585              card->stats.rx_frame_errors +
4586              card->stats.rx_fifo_errors;
4587         break;
4588     case MII_SREVISION: /* silicon revision */
4589         break;
4590     case MII_RESV1: /* reserved 1 */
4591         break;
4592     case MII_LBRERROR: /* loopback, rx, bypass error */
4593         break;
4594     case MII_PHYADDR: /* physical address */
4595         break;
4596     case MII_RESV2: /* reserved 2 */
4597         break;
4598     case MII_TPISTATUS: /* TPI status for 10mbps */
4599         break;
4600     case MII_NCONFIG: /* network interface config */
4601         break;
4602     default:
4603         break;
4604     }
4605     return rc;
4606 }
4607
4608 static int qeth_snmp_command_cb(struct qeth_card *card,
4609                 struct qeth_reply *reply, unsigned long data)
4610 {
4611     struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4612     struct qeth_arp_query_info *qinfo = reply->param;
4613     struct qeth_ipacmd_setadpparms *adp_cmd;
4614     unsigned int data_len;
4615     void *snmp_data;
4616
4617     QETH_CARD_TEXT(card, 3, "snpcmdcb");
4618
4619     if (cmd->hdr.return_code) {
4620         QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4621         return -EIO;
4622     }
4623     if (cmd->data.setadapterparms.hdr.return_code) {
4624         cmd->hdr.return_code =
4625             cmd->data.setadapterparms.hdr.return_code;
4626         QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4627         return -EIO;
4628     }
4629
4630     adp_cmd = &cmd->data.setadapterparms;
4631     data_len = adp_cmd->hdr.cmdlength - sizeof(adp_cmd->hdr);
4632     if (adp_cmd->hdr.seq_no == 1) {
4633         snmp_data = &adp_cmd->data.snmp;
4634     } else {
4635         snmp_data = &adp_cmd->data.snmp.request;
4636         data_len -= offsetof(struct qeth_snmp_cmd, request);
4637     }
4638
4639     /* check if there is enough room in userspace */
4640     if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4641         QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC);
4642         return -ENOSPC;
4643     }
4644     QETH_CARD_TEXT_(card, 4, "snore%i",
4645             cmd->data.setadapterparms.hdr.used_total);
4646     QETH_CARD_TEXT_(card, 4, "sseqn%i",
4647             cmd->data.setadapterparms.hdr.seq_no);
4648     /*copy entries to user buffer*/
4649     memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
4650     qinfo->udata_offset += data_len;
4651
4652     if (cmd->data.setadapterparms.hdr.seq_no <
4653         cmd->data.setadapterparms.hdr.used_total)
4654         return 1;
4655     return 0;
4656 }
4657
4658 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4659 {
4660     struct qeth_snmp_ureq __user *ureq;
4661     struct qeth_cmd_buffer *iob;
4662     unsigned int req_len;
4663     struct qeth_arp_query_info qinfo = {0, };
4664     int rc = 0;
4665
4666     QETH_CARD_TEXT(card, 3, "snmpcmd");
4667
4668     if (IS_VM_NIC(card))
4669         return -EOPNOTSUPP;
4670
4671     if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4672         IS_LAYER3(card))
4673         return -EOPNOTSUPP;
4674
4675     ureq = (struct qeth_snmp_ureq __user *) udata;
4676     if (get_user(qinfo.udata_len, &ureq->hdr.data_len) ||
4677         get_user(req_len, &ureq->hdr.req_len))
4678         return -EFAULT;
4679
4680     /* Sanitize user input, to avoid overflows in iob size calculation: */
4681     if (req_len > QETH_BUFSIZE)
4682         return -EINVAL;
4683
4684     iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL, req_len);
4685     if (!iob)
4686         return -ENOMEM;
4687
4688     if (copy_from_user(&__ipa_cmd(iob)->data.setadapterparms.data.snmp,
4689                &ureq->cmd, req_len)) {
4690         qeth_put_cmd(iob);
4691         return -EFAULT;
4692     }
4693
4694     qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4695     if (!qinfo.udata) {
4696         qeth_put_cmd(iob);
4697         return -ENOMEM;
4698     }
4699     qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4700
4701     rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo);
4702     if (rc)
4703         QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n",
4704                  CARD_DEVID(card), rc);
4705     else {
4706         if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4707             rc = -EFAULT;
4708     }
4709
4710     kfree(qinfo.udata);
4711     return rc;
4712 }
4713
4714 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4715                      struct qeth_reply *reply,
4716                      unsigned long data)
4717 {
4718     struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4719     struct qeth_qoat_priv *priv = reply->param;
4720     int resdatalen;
4721
4722     QETH_CARD_TEXT(card, 3, "qoatcb");
4723     if (qeth_setadpparms_inspect_rc(cmd))
4724         return -EIO;
4725
4726     resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4727
4728     if (resdatalen > (priv->buffer_len - priv->response_len))
4729         return -ENOSPC;
4730
4731     memcpy(priv->buffer + priv->response_len,
4732            &cmd->data.setadapterparms.hdr, resdatalen);
4733     priv->response_len += resdatalen;
4734
4735     if (cmd->data.setadapterparms.hdr.seq_no <
4736         cmd->data.setadapterparms.hdr.used_total)
4737         return 1;
4738     return 0;
4739 }
4740
4741 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4742 {
4743     int rc = 0;
4744     struct qeth_cmd_buffer *iob;
4745     struct qeth_ipa_cmd *cmd;
4746     struct qeth_query_oat *oat_req;
4747     struct qeth_query_oat_data oat_data;
4748     struct qeth_qoat_priv priv;
4749     void __user *tmp;
4750
4751     QETH_CARD_TEXT(card, 3, "qoatcmd");
4752
4753     if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT))
4754         return -EOPNOTSUPP;
4755
4756     if (copy_from_user(&oat_data, udata, sizeof(oat_data)))
4757         return -EFAULT;
4758
4759     priv.buffer_len = oat_data.buffer_len;
4760     priv.response_len = 0;
4761     priv.buffer = vzalloc(oat_data.buffer_len);
4762     if (!priv.buffer)
4763         return -ENOMEM;
4764
4765     iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4766                    SETADP_DATA_SIZEOF(query_oat));
4767     if (!iob) {
4768         rc = -ENOMEM;
4769         goto out_free;
4770     }
4771     cmd = __ipa_cmd(iob);
4772     oat_req = &cmd->data.setadapterparms.data.query_oat;
4773     oat_req->subcmd_code = oat_data.command;
4774
4775     rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb, &priv);
4776     if (!rc) {
4777         tmp = is_compat_task() ? compat_ptr(oat_data.ptr) :
4778                      u64_to_user_ptr(oat_data.ptr);
4779         oat_data.response_len = priv.response_len;
4780
4781         if (copy_to_user(tmp, priv.buffer, priv.response_len) ||
4782             copy_to_user(udata, &oat_data, sizeof(oat_data)))
4783             rc = -EFAULT;
4784     }
4785
4786 out_free:
4787     vfree(priv.buffer);
4788     return rc;
4789 }
4790
4791 static int qeth_init_link_info_oat_cb(struct qeth_card *card,
4792                       struct qeth_reply *reply_priv,
4793                       unsigned long data)
4794 {
4795     struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4796     struct qeth_link_info *link_info = reply_priv->param;
4797     struct qeth_query_oat_physical_if *phys_if;
4798     struct qeth_query_oat_reply *reply;
4799
4800     QETH_CARD_TEXT(card, 2, "qoatincb");
4801     if (qeth_setadpparms_inspect_rc(cmd))
4802         return -EIO;
4803
4804     /* Multi-part reply is unexpected, don't bother: */
4805     if (cmd->data.setadapterparms.hdr.used_total > 1)
4806         return -EINVAL;
4807
4808     /* Expect the reply to start with phys_if data: */
4809     reply = &cmd->data.setadapterparms.data.query_oat.reply[0];
4810     if (reply->type != QETH_QOAT_REPLY_TYPE_PHYS_IF ||
4811         reply->length < sizeof(*reply))
4812         return -EINVAL;
4813
4814     phys_if = &reply->phys_if;
4815
4816     switch (phys_if->speed_duplex) {
4817     case QETH_QOAT_PHYS_SPEED_10M_HALF:
4818         link_info->speed = SPEED_10;
4819         link_info->duplex = DUPLEX_HALF;
4820         break;
4821     case QETH_QOAT_PHYS_SPEED_10M_FULL:
4822         link_info->speed = SPEED_10;
4823         link_info->duplex = DUPLEX_FULL;
4824         break;
4825     case QETH_QOAT_PHYS_SPEED_100M_HALF:
4826         link_info->speed = SPEED_100;
4827         link_info->duplex = DUPLEX_HALF;
4828         break;
4829     case QETH_QOAT_PHYS_SPEED_100M_FULL:
4830         link_info->speed = SPEED_100;
4831         link_info->duplex = DUPLEX_FULL;
4832         break;
4833     case QETH_QOAT_PHYS_SPEED_1000M_HALF:
4834         link_info->speed = SPEED_1000;
4835         link_info->duplex = DUPLEX_HALF;
4836         break;
4837     case QETH_QOAT_PHYS_SPEED_1000M_FULL:
4838         link_info->speed = SPEED_1000;
4839         link_info->duplex = DUPLEX_FULL;
4840         break;
4841     case QETH_QOAT_PHYS_SPEED_10G_FULL:
4842         link_info->speed = SPEED_10000;
4843         link_info->duplex = DUPLEX_FULL;
4844         break;
4845     case QETH_QOAT_PHYS_SPEED_25G_FULL:
4846         link_info->speed = SPEED_25000;
4847         link_info->duplex = DUPLEX_FULL;
4848         break;
4849     case QETH_QOAT_PHYS_SPEED_UNKNOWN:
4850     default:
4851         link_info->speed = SPEED_UNKNOWN;
4852         link_info->duplex = DUPLEX_UNKNOWN;
4853         break;
4854     }
4855
4856     switch (phys_if->media_type) {
4857     case QETH_QOAT_PHYS_MEDIA_COPPER:
4858         link_info->port = PORT_TP;
4859         link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
4860         break;
4861     case QETH_QOAT_PHYS_MEDIA_FIBRE_SHORT:
4862         link_info->port = PORT_FIBRE;
4863         link_info->link_mode = QETH_LINK_MODE_FIBRE_SHORT;
4864         break;
4865     case QETH_QOAT_PHYS_MEDIA_FIBRE_LONG:
4866         link_info->port = PORT_FIBRE;
4867         link_info->link_mode = QETH_LINK_MODE_FIBRE_LONG;
4868         break;
4869     default:
4870         link_info->port = PORT_OTHER;
4871         link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
4872         break;
4873     }
4874
4875     return 0;
4876 }
4877
4878 static void qeth_init_link_info(struct qeth_card *card)
4879 {
4880     qeth_default_link_info(card);
4881
4882     /* Get more accurate data via QUERY OAT: */
4883     if (qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
4884         struct qeth_link_info link_info;
4885         struct qeth_cmd_buffer *iob;
4886
4887         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4888                        SETADP_DATA_SIZEOF(query_oat));
4889         if (iob) {
4890             struct qeth_ipa_cmd *cmd = __ipa_cmd(iob);
4891             struct qeth_query_oat *oat_req;
4892
4893             oat_req = &cmd->data.setadapterparms.data.query_oat;
4894             oat_req->subcmd_code = QETH_QOAT_SCOPE_INTERFACE;
4895
4896             if (!qeth_send_ipa_cmd(card, iob,
4897                            qeth_init_link_info_oat_cb,
4898                            &link_info)) {
4899                 if (link_info.speed != SPEED_UNKNOWN)
4900                     card->info.link_info.speed = link_info.speed;
4901                 if (link_info.duplex != DUPLEX_UNKNOWN)
4902                     card->info.link_info.duplex = link_info.duplex;
4903                 if (link_info.port != PORT_OTHER)
4904                     card->info.link_info.port = link_info.port;
4905                 if (link_info.link_mode != QETH_LINK_MODE_UNKNOWN)
4906                     card->info.link_info.link_mode = link_info.link_mode;
4907             }
4908         }
4909     }
4910 }
4911
4912 /**
4913  * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
4914  * @card: pointer to a qeth_card
4915  *
4916  * Returns
4917  *  0, if a MAC address has been set for the card's netdevice
4918  *  a return code, for various error conditions
4919  */
4920 int qeth_vm_request_mac(struct qeth_card *card)
4921 {
4922     struct diag26c_mac_resp *response;
4923     struct diag26c_mac_req *request;
4924     int rc;
4925
4926     QETH_CARD_TEXT(card, 2, "vmreqmac");
4927
4928     request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
4929     response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
4930     if (!request || !response) {
4931         rc = -ENOMEM;
4932         goto out;
4933     }
4934
4935     request->resp_buf_len = sizeof(*response);
4936     request->resp_version = DIAG26C_VERSION2;
4937     request->op_code = DIAG26C_GET_MAC;
4938     request->devno = card->info.ddev_devno;
4939
4940     QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4941     rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
4942     QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4943     if (rc)
4944         goto out;
4945     QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
4946
4947     if (request->resp_buf_len < sizeof(*response) ||
4948         response->version != request->resp_version) {
4949         rc = -EIO;
4950         QETH_CARD_TEXT(card, 2, "badresp");
4951         QETH_CARD_HEX(card, 2, &request->resp_buf_len,
4952                   sizeof(request->resp_buf_len));
4953     } else if (!is_valid_ether_addr(response->mac)) {
4954         rc = -EINVAL;
4955         QETH_CARD_TEXT(card, 2, "badmac");
4956         QETH_CARD_HEX(card, 2, response->mac, ETH_ALEN);
4957     } else {
4958         eth_hw_addr_set(card->dev, response->mac);
4959     }
4960
4961 out:
4962     kfree(response);
4963     kfree(request);
4964     return rc;
4965 }
4966 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
4967
4968 static void qeth_determine_capabilities(struct qeth_card *card)
4969 {
4970     struct qeth_channel *channel = &card->data;
4971     struct ccw_device *ddev = channel->ccwdev;
4972     int rc;
4973     int ddev_offline = 0;
4974
4975     QETH_CARD_TEXT(card, 2, "detcapab");
4976     if (!ddev->online) {
4977         ddev_offline = 1;
4978         rc = qeth_start_channel(channel);
4979         if (rc) {
4980             QETH_CARD_TEXT_(card, 2, "3err%d", rc);
4981             goto out;
4982         }
4983     }
4984
4985     rc = qeth_read_conf_data(card);
4986     if (rc) {
4987         QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n",
4988                  CARD_DEVID(card), rc);
4989         QETH_CARD_TEXT_(card, 2, "5err%d", rc);
4990         goto out_offline;
4991     }
4992
4993     rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
4994     if (rc)
4995         QETH_CARD_TEXT_(card, 2, "6err%d", rc);
4996
4997     QETH_CARD_TEXT_(card, 2, "qfmt%d", card->ssqd.qfmt);
4998     QETH_CARD_TEXT_(card, 2, "ac1:%02x", card->ssqd.qdioac1);
4999     QETH_CARD_TEXT_(card, 2, "ac2:%04x", card->ssqd.qdioac2);
5000     QETH_CARD_TEXT_(card, 2, "ac3:%04x", card->ssqd.qdioac3);
5001     QETH_CARD_TEXT_(card, 2, "icnt%d", card->ssqd.icnt);
5002     if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
5003         ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
5004         ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
5005         dev_info(&card->gdev->dev,
5006             "Completion Queueing supported\n");
5007     } else {
5008         card->options.cq = QETH_CQ_NOTAVAILABLE;
5009     }
5010
5011 out_offline:
5012     if (ddev_offline == 1)
5013         qeth_stop_channel(channel);
5014 out:
5015     return;
5016 }
5017
5018 static void qeth_read_ccw_conf_data(struct qeth_card *card)
5019 {
5020     struct qeth_card_info *info = &card->info;
5021     struct ccw_device *cdev = CARD_DDEV(card);
5022     struct ccw_dev_id dev_id;
5023
5024     QETH_CARD_TEXT(card, 2, "ccwconfd");
5025     ccw_device_get_id(cdev, &dev_id);
5026
5027     info->ddev_devno = dev_id.devno;
5028     info->ids_valid = !ccw_device_get_cssid(cdev, &info->cssid) &&
5029               !ccw_device_get_iid(cdev, &info->iid) &&
5030               !ccw_device_get_chid(cdev, 0, &info->chid);
5031     info->ssid = dev_id.ssid;
5032
5033     dev_info(&card->gdev->dev, "CHID: %x CHPID: %x\n",
5034          info->chid, info->chpid);
5035
5036     QETH_CARD_TEXT_(card, 3, "devn%x", info->ddev_devno);
5037     QETH_CARD_TEXT_(card, 3, "cssid:%x", info->cssid);
5038     QETH_CARD_TEXT_(card, 3, "iid:%x", info->iid);
5039     QETH_CARD_TEXT_(card, 3, "ssid:%x", info->ssid);
5040     QETH_CARD_TEXT_(card, 3, "chpid:%x", info->chpid);
5041     QETH_CARD_TEXT_(card, 3, "chid:%x", info->chid);
5042     QETH_CARD_TEXT_(card, 3, "idval%x", info->ids_valid);
5043 }
5044
5045 static int qeth_qdio_establish(struct qeth_card *card)
5046 {
5047     struct qdio_buffer **out_sbal_ptrs[QETH_MAX_OUT_QUEUES];
5048     struct qdio_buffer **in_sbal_ptrs[QETH_MAX_IN_QUEUES];
5049     struct qeth_qib_parms *qib_parms = NULL;
5050     struct qdio_initialize init_data;
5051     unsigned int no_input_qs = 1;
5052     unsigned int i;
5053     int rc = 0;
5054
5055     QETH_CARD_TEXT(card, 2, "qdioest");
5056
5057     if (!IS_IQD(card) && !IS_VM_NIC(card)) {
5058         qib_parms = kzalloc(sizeof_field(struct qib, parm), GFP_KERNEL);
5059         if (!qib_parms)
5060             return -ENOMEM;
5061
5062         qeth_fill_qib_parms(card, qib_parms);
5063     }
5064
5065     in_sbal_ptrs[0] = card->qdio.in_q->qdio_bufs;
5066     if (card->options.cq == QETH_CQ_ENABLED) {
5067         in_sbal_ptrs[1] = card->qdio.c_q->qdio_bufs;
5068         no_input_qs++;
5069     }
5070
5071     for (i = 0; i < card->qdio.no_out_queues; i++)
5072         out_sbal_ptrs[i] = card->qdio.out_qs[i]->qdio_bufs;
5073
5074     memset(&init_data, 0, sizeof(struct qdio_initialize));
5075     init_data.q_format       = IS_IQD(card) ? QDIO_IQDIO_QFMT :
5076                               QDIO_QETH_QFMT;
5077     init_data.qib_param_field_format = 0;
5078     init_data.qib_param_field    = (void *)qib_parms;
5079     init_data.no_input_qs        = no_input_qs;
5080     init_data.no_output_qs           = card->qdio.no_out_queues;
5081     init_data.input_handler      = qeth_qdio_input_handler;
5082     init_data.output_handler     = qeth_qdio_output_handler;
5083     init_data.irq_poll       = qeth_qdio_poll;
5084     init_data.int_parm               = (unsigned long) card;
5085     init_data.input_sbal_addr_array  = in_sbal_ptrs;
5086     init_data.output_sbal_addr_array = out_sbal_ptrs;
5087
5088     if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
5089         QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
5090         rc = qdio_allocate(CARD_DDEV(card), init_data.no_input_qs,
5091                    init_data.no_output_qs);
5092         if (rc) {
5093             atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5094             goto out;
5095         }
5096         rc = qdio_establish(CARD_DDEV(card), &init_data);
5097         if (rc) {
5098             atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5099             qdio_free(CARD_DDEV(card));
5100         }
5101     }
5102
5103     switch (card->options.cq) {
5104     case QETH_CQ_ENABLED:
5105         dev_info(&card->gdev->dev, "Completion Queue support enabled");
5106         break;
5107     case QETH_CQ_DISABLED:
5108         dev_info(&card->gdev->dev, "Completion Queue support disabled");
5109         break;
5110     default:
5111         break;
5112     }
5113
5114 out:
5115     kfree(qib_parms);
5116     return rc;
5117 }
5118
5119 static void qeth_core_free_card(struct qeth_card *card)
5120 {
5121     QETH_CARD_TEXT(card, 2, "freecrd");
5122
5123     unregister_service_level(&card->qeth_service_level);
5124     debugfs_remove_recursive(card->debugfs);
5125     qeth_put_cmd(card->read_cmd);
5126     destroy_workqueue(card->event_wq);
5127     dev_set_drvdata(&card->gdev->dev, NULL);
5128     kfree(card);
5129 }
5130
5131 static void qeth_trace_features(struct qeth_card *card)
5132 {
5133     QETH_CARD_TEXT(card, 2, "features");
5134     QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
5135     QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
5136     QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
5137     QETH_CARD_HEX(card, 2, &card->info.diagass_support,
5138               sizeof(card->info.diagass_support));
5139 }
5140
5141 static struct ccw_device_id qeth_ids[] = {
5142     {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
5143                     .driver_info = QETH_CARD_TYPE_OSD},
5144     {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
5145                     .driver_info = QETH_CARD_TYPE_IQD},
5146     {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
5147                     .driver_info = QETH_CARD_TYPE_OSM},
5148 #ifdef CONFIG_QETH_OSX
5149     {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
5150                     .driver_info = QETH_CARD_TYPE_OSX},
5151 #endif
5152     {},
5153 };
5154 MODULE_DEVICE_TABLE(ccw, qeth_ids);
5155
5156 static struct ccw_driver qeth_ccw_driver = {
5157     .driver = {
5158         .owner = THIS_MODULE,
5159         .name = "qeth",
5160     },
5161     .ids = qeth_ids,
5162     .probe = ccwgroup_probe_ccwdev,
5163     .remove = ccwgroup_remove_ccwdev,
5164 };
5165
5166 static int qeth_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
5167 {
5168     int retries = 3;
5169     int rc;
5170
5171     QETH_CARD_TEXT(card, 2, "hrdsetup");
5172     atomic_set(&card->force_alloc_skb, 0);
5173     rc = qeth_update_from_chp_desc(card);
5174     if (rc)
5175         return rc;
5176 retry:
5177     if (retries < 3)
5178         QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n",
5179                  CARD_DEVID(card));
5180     rc = qeth_qdio_clear_card(card, !IS_IQD(card));
5181     qeth_stop_channel(&card->data);
5182     qeth_stop_channel(&card->write);
5183     qeth_stop_channel(&card->read);
5184     qdio_free(CARD_DDEV(card));
5185
5186     rc = qeth_start_channel(&card->read);
5187     if (rc)
5188         goto retriable;
5189     rc = qeth_start_channel(&card->write);
5190     if (rc)
5191         goto retriable;
5192     rc = qeth_start_channel(&card->data);
5193     if (rc)
5194         goto retriable;
5195 retriable:
5196     if (rc == -ERESTARTSYS) {
5197         QETH_CARD_TEXT(card, 2, "break1");
5198         return rc;
5199     } else if (rc) {
5200         QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5201         if (--retries < 0)
5202             goto out;
5203         else
5204             goto retry;
5205     }
5206
5207     qeth_determine_capabilities(card);
5208     qeth_read_ccw_conf_data(card);
5209     qeth_idx_init(card);
5210
5211     rc = qeth_idx_activate_read_channel(card);
5212     if (rc == -EINTR) {
5213         QETH_CARD_TEXT(card, 2, "break2");
5214         return rc;
5215     } else if (rc) {
5216         QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5217         if (--retries < 0)
5218             goto out;
5219         else
5220             goto retry;
5221     }
5222
5223     rc = qeth_idx_activate_write_channel(card);
5224     if (rc == -EINTR) {
5225         QETH_CARD_TEXT(card, 2, "break3");
5226         return rc;
5227     } else if (rc) {
5228         QETH_CARD_TEXT_(card, 2, "4err%d", rc);
5229         if (--retries < 0)
5230             goto out;
5231         else
5232             goto retry;
5233     }
5234     card->read_or_write_problem = 0;
5235     rc = qeth_mpc_initialize(card);
5236     if (rc) {
5237         QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5238         goto out;
5239     }
5240
5241     rc = qeth_send_startlan(card);
5242     if (rc) {
5243         QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5244         if (rc == -ENETDOWN) {
5245             dev_warn(&card->gdev->dev, "The LAN is offline\n");
5246             *carrier_ok = false;
5247         } else {
5248             goto out;
5249         }
5250     } else {
5251         *carrier_ok = true;
5252     }
5253
5254     card->options.ipa4.supported = 0;
5255     card->options.ipa6.supported = 0;
5256     card->options.adp.supported = 0;
5257     card->options.sbp.supported_funcs = 0;
5258     card->info.diagass_support = 0;
5259     rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5260     if (rc == -ENOMEM)
5261         goto out;
5262     if (qeth_is_supported(card, IPA_IPV6)) {
5263         rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
5264         if (rc == -ENOMEM)
5265             goto out;
5266     }
5267     if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5268         rc = qeth_query_setadapterparms(card);
5269         if (rc < 0) {
5270             QETH_CARD_TEXT_(card, 2, "7err%d", rc);
5271             goto out;
5272         }
5273     }
5274     if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5275         rc = qeth_query_setdiagass(card);
5276         if (rc)
5277             QETH_CARD_TEXT_(card, 2, "8err%d", rc);
5278     }
5279
5280     qeth_trace_features(card);
5281
5282     if (!qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP) ||
5283         (card->info.hwtrap && qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM)))
5284         card->info.hwtrap = 0;
5285
5286     if (card->options.isolation != ISOLATION_MODE_NONE) {
5287         rc = qeth_setadpparms_set_access_ctrl(card,
5288                               card->options.isolation);
5289         if (rc)
5290             goto out;
5291     }
5292
5293     qeth_init_link_info(card);
5294
5295     rc = qeth_init_qdio_queues(card);
5296     if (rc) {
5297         QETH_CARD_TEXT_(card, 2, "9err%d", rc);
5298         goto out;
5299     }
5300
5301     return 0;
5302 out:
5303     dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5304         "an error on the device\n");
5305     QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n",
5306              CARD_DEVID(card), rc);
5307     return rc;
5308 }
5309
5310 static int qeth_set_online(struct qeth_card *card,
5311                const struct qeth_discipline *disc)
5312 {
5313     bool carrier_ok;
5314     int rc;
5315
5316     mutex_lock(&card->conf_mutex);
5317     QETH_CARD_TEXT(card, 2, "setonlin");
5318
5319     rc = qeth_hardsetup_card(card, &carrier_ok);
5320     if (rc) {
5321         QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
5322         rc = -ENODEV;
5323         goto err_hardsetup;
5324     }
5325
5326     qeth_print_status_message(card);
5327
5328     if (card->dev->reg_state != NETREG_REGISTERED)
5329         /* no need for locking / error handling at this early stage: */
5330         qeth_set_real_num_tx_queues(card, qeth_tx_actual_queues(card));
5331
5332     rc = disc->set_online(card, carrier_ok);
5333     if (rc)
5334         goto err_online;
5335
5336     /* let user_space know that device is online */
5337     kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5338
5339     mutex_unlock(&card->conf_mutex);
5340     return 0;
5341
5342 err_online:
5343 err_hardsetup:
5344     qeth_qdio_clear_card(card, 0);
5345     qeth_clear_working_pool_list(card);
5346     qeth_flush_local_addrs(card);
5347
5348     qeth_stop_channel(&card->data);
5349     qeth_stop_channel(&card->write);
5350     qeth_stop_channel(&card->read);
5351     qdio_free(CARD_DDEV(card));
5352
5353     mutex_unlock(&card->conf_mutex);
5354     return rc;
5355 }
5356
5357 int qeth_set_offline(struct qeth_card *card, const struct qeth_discipline *disc,
5358              bool resetting)
5359 {
5360     int rc, rc2, rc3;
5361
5362     mutex_lock(&card->conf_mutex);
5363     QETH_CARD_TEXT(card, 3, "setoffl");
5364
5365     if ((!resetting && card->info.hwtrap) || card->info.hwtrap == 2) {
5366         qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5367         card->info.hwtrap = 1;
5368     }
5369
5370     /* cancel any stalled cmd that might block the rtnl: */
5371     qeth_clear_ipacmd_list(card);
5372
5373     rtnl_lock();
5374     card->info.open_when_online = card->dev->flags & IFF_UP;
5375     dev_close(card->dev);
5376     netif_device_detach(card->dev);
5377     netif_carrier_off(card->dev);
5378     rtnl_unlock();
5379
5380     cancel_work_sync(&card->rx_mode_work);
5381
5382     disc->set_offline(card);
5383
5384     qeth_qdio_clear_card(card, 0);
5385     qeth_drain_output_queues(card);
5386     qeth_clear_working_pool_list(card);
5387     qeth_flush_local_addrs(card);
5388     card->info.promisc_mode = 0;
5389     qeth_default_link_info(card);
5390
5391     rc  = qeth_stop_channel(&card->data);
5392     rc2 = qeth_stop_channel(&card->write);
5393     rc3 = qeth_stop_channel(&card->read);
5394     if (!rc)
5395         rc = (rc2) ? rc2 : rc3;
5396     if (rc)
5397         QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5398     qdio_free(CARD_DDEV(card));
5399
5400     /* let user_space know that device is offline */
5401     kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5402
5403     mutex_unlock(&card->conf_mutex);
5404     return 0;
5405 }
5406 EXPORT_SYMBOL_GPL(qeth_set_offline);
5407
5408 static int qeth_do_reset(void *data)
5409 {
5410     const struct qeth_discipline *disc;
5411     struct qeth_card *card = data;
5412     int rc;
5413
5414     /* Lock-free, other users will block until we are done. */
5415     disc = card->discipline;
5416
5417     QETH_CARD_TEXT(card, 2, "recover1");
5418     if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
5419         return 0;
5420     QETH_CARD_TEXT(card, 2, "recover2");
5421     dev_warn(&card->gdev->dev,
5422          "A recovery process has been started for the device\n");
5423
5424     qeth_set_offline(card, disc, true);
5425     rc = qeth_set_online(card, disc);
5426     if (!rc) {
5427         dev_info(&card->gdev->dev,
5428              "Device successfully recovered!\n");
5429     } else {
5430         qeth_set_offline(card, disc, true);
5431         ccwgroup_set_offline(card->gdev, false);
5432         dev_warn(&card->gdev->dev,
5433              "The qeth device driver failed to recover an error on the device\n");
5434     }
5435     qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
5436     qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
5437     return 0;
5438 }
5439
5440 #if IS_ENABLED(CONFIG_QETH_L3)
5441 static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb,
5442                 struct qeth_hdr *hdr)
5443 {
5444     struct af_iucv_trans_hdr *iucv = (struct af_iucv_trans_hdr *) skb->data;
5445     struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
5446     struct net_device *dev = skb->dev;
5447
5448     if (IS_IQD(card) && iucv->magic == ETH_P_AF_IUCV) {
5449         dev_hard_header(skb, dev, ETH_P_AF_IUCV, dev->dev_addr,
5450                 "FAKELL", skb->len);
5451         return;
5452     }
5453
5454     if (!(l3_hdr->flags & QETH_HDR_PASSTHRU)) {
5455         u16 prot = (l3_hdr->flags & QETH_HDR_IPV6) ? ETH_P_IPV6 :
5456                                  ETH_P_IP;
5457         unsigned char tg_addr[ETH_ALEN];
5458
5459         skb_reset_network_header(skb);
5460         switch (l3_hdr->flags & QETH_HDR_CAST_MASK) {
5461         case QETH_CAST_MULTICAST:
5462             if (prot == ETH_P_IP)
5463                 ip_eth_mc_map(ip_hdr(skb)->daddr, tg_addr);
5464             else
5465                 ipv6_eth_mc_map(&ipv6_hdr(skb)->daddr, tg_addr);
5466             QETH_CARD_STAT_INC(card, rx_multicast);
5467             break;
5468         case QETH_CAST_BROADCAST:
5469             ether_addr_copy(tg_addr, dev->broadcast);
5470             QETH_CARD_STAT_INC(card, rx_multicast);
5471             break;
5472         default:
5473             if (card->options.sniffer)
5474                 skb->pkt_type = PACKET_OTHERHOST;
5475             ether_addr_copy(tg_addr, dev->dev_addr);
5476         }
5477
5478         if (l3_hdr->ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR)
5479             dev_hard_header(skb, dev, prot, tg_addr,
5480                     &l3_hdr->next_hop.rx.src_mac, skb->len);
5481         else
5482             dev_hard_header(skb, dev, prot, tg_addr, "FAKELL",
5483                     skb->len);
5484     }
5485
5486     /* copy VLAN tag from hdr into skb */
5487     if (!card->options.sniffer &&
5488         (l3_hdr->ext_flags & (QETH_HDR_EXT_VLAN_FRAME |
5489                   QETH_HDR_EXT_INCLUDE_VLAN_TAG))) {
5490         u16 tag = (l3_hdr->ext_flags & QETH_HDR_EXT_VLAN_FRAME) ?
5491                 l3_hdr->vlan_id :
5492                 l3_hdr->next_hop.rx.vlan_id;
5493
5494         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
5495     }
5496 }
5497 #endif
5498
5499 static void qeth_receive_skb(struct qeth_card *card, struct sk_buff *skb,
5500                  bool uses_frags, bool is_cso)
5501 {
5502     struct napi_struct *napi = &card->napi;
5503
5504     if (is_cso && (card->dev->features & NETIF_F_RXCSUM)) {
5505         skb->ip_summed = CHECKSUM_UNNECESSARY;
5506         QETH_CARD_STAT_INC(card, rx_skb_csum);
5507     } else {
5508         skb->ip_summed = CHECKSUM_NONE;
5509     }
5510
5511     QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
5512     QETH_CARD_STAT_INC(card, rx_packets);
5513     if (skb_is_nonlinear(skb)) {
5514         QETH_CARD_STAT_INC(card, rx_sg_skbs);
5515         QETH_CARD_STAT_ADD(card, rx_sg_frags,
5516                    skb_shinfo(skb)->nr_frags);
5517     }
5518
5519     if (uses_frags) {
5520         napi_gro_frags(napi);
5521     } else {
5522         skb->protocol = eth_type_trans(skb, skb->dev);
5523         napi_gro_receive(napi, skb);
5524     }
5525 }
5526
5527 static void qeth_create_skb_frag(struct sk_buff *skb, char *data, int data_len)
5528 {
5529     struct page *page = virt_to_page(data);
5530     unsigned int next_frag;
5531
5532     next_frag = skb_shinfo(skb)->nr_frags;
5533     get_page(page);
5534     skb_add_rx_frag(skb, next_frag, page, offset_in_page(data), data_len,
5535             data_len);
5536 }
5537
5538 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5539 {
5540     return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5541 }
5542
5543 static int qeth_extract_skb(struct qeth_card *card,
5544                 struct qeth_qdio_buffer *qethbuffer, u8 *element_no,
5545                 int *__offset)
5546 {
5547     struct qeth_priv *priv = netdev_priv(card->dev);
5548     struct qdio_buffer *buffer = qethbuffer->buffer;
5549     struct napi_struct *napi = &card->napi;
5550     struct qdio_buffer_element *element;
5551     unsigned int linear_len = 0;
5552     bool uses_frags = false;
5553     int offset = *__offset;
5554     bool use_rx_sg = false;
5555     unsigned int headroom;
5556     struct qeth_hdr *hdr;
5557     struct sk_buff *skb;
5558     int skb_len = 0;
5559     bool is_cso;
5560
5561     element = &buffer->element[*element_no];
5562
5563 next_packet:
5564     /* qeth_hdr must not cross element boundaries */
5565     while (element->length < offset + sizeof(struct qeth_hdr)) {
5566         if (qeth_is_last_sbale(element))
5567             return -ENODATA;
5568         element++;
5569         offset = 0;
5570     }
5571
5572     hdr = phys_to_virt(element->addr) + offset;
5573     offset += sizeof(*hdr);
5574     skb = NULL;
5575
5576     switch (hdr->hdr.l2.id) {
5577     case QETH_HEADER_TYPE_LAYER2:
5578         skb_len = hdr->hdr.l2.pkt_length;
5579         is_cso = hdr->hdr.l2.flags[1] & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5580
5581         linear_len = ETH_HLEN;
5582         headroom = 0;
5583         break;
5584     case QETH_HEADER_TYPE_LAYER3:
5585         skb_len = hdr->hdr.l3.length;
5586         is_cso = hdr->hdr.l3.ext_flags & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5587
5588         if (!IS_LAYER3(card)) {
5589             QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5590             goto walk_packet;
5591         }
5592
5593         if (hdr->hdr.l3.flags & QETH_HDR_PASSTHRU) {
5594             linear_len = ETH_HLEN;
5595             headroom = 0;
5596             break;
5597         }
5598
5599         if (hdr->hdr.l3.flags & QETH_HDR_IPV6)
5600             linear_len = sizeof(struct ipv6hdr);
5601         else
5602             linear_len = sizeof(struct iphdr);
5603         headroom = ETH_HLEN;
5604         break;
5605     default:
5606         if (hdr->hdr.l2.id & QETH_HEADER_MASK_INVAL)
5607             QETH_CARD_STAT_INC(card, rx_frame_errors);
5608         else
5609             QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5610
5611         /* Can't determine packet length, drop the whole buffer. */
5612         return -EPROTONOSUPPORT;
5613     }
5614
5615     if (skb_len < linear_len) {
5616         QETH_CARD_STAT_INC(card, rx_dropped_runt);
5617         goto walk_packet;
5618     }
5619
5620     use_rx_sg = (card->options.cq == QETH_CQ_ENABLED) ||
5621             (skb_len > READ_ONCE(priv->rx_copybreak) &&
5622              !atomic_read(&card->force_alloc_skb));
5623
5624     if (use_rx_sg) {
5625         /* QETH_CQ_ENABLED only: */
5626         if (qethbuffer->rx_skb &&
5627             skb_tailroom(qethbuffer->rx_skb) >= linear_len + headroom) {
5628             skb = qethbuffer->rx_skb;
5629             qethbuffer->rx_skb = NULL;
5630             goto use_skb;
5631         }
5632
5633         skb = napi_get_frags(napi);
5634         if (!skb) {
5635             /* -ENOMEM, no point in falling back further. */
5636             QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5637             goto walk_packet;
5638         }
5639
5640         if (skb_tailroom(skb) >= linear_len + headroom) {
5641             uses_frags = true;
5642             goto use_skb;
5643         }
5644
5645         netdev_info_once(card->dev,
5646                  "Insufficient linear space in NAPI frags skb, need %u but have %u\n",
5647                  linear_len + headroom, skb_tailroom(skb));
5648         /* Shouldn't happen. Don't optimize, fall back to linear skb. */
5649     }
5650
5651     linear_len = skb_len;
5652     skb = napi_alloc_skb(napi, linear_len + headroom);
5653     if (!skb) {
5654         QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5655         goto walk_packet;
5656     }
5657
5658 use_skb:
5659     if (headroom)
5660         skb_reserve(skb, headroom);
5661 walk_packet:
5662     while (skb_len) {
5663         int data_len = min(skb_len, (int)(element->length - offset));
5664         char *data = phys_to_virt(element->addr) + offset;
5665
5666         skb_len -= data_len;
5667         offset += data_len;
5668
5669         /* Extract data from current element: */
5670         if (skb && data_len) {
5671             if (linear_len) {
5672                 unsigned int copy_len;
5673
5674                 copy_len = min_t(unsigned int, linear_len,
5675                          data_len);
5676
5677                 skb_put_data(skb, data, copy_len);
5678                 linear_len -= copy_len;
5679                 data_len -= copy_len;
5680                 data += copy_len;
5681             }
5682
5683             if (data_len)
5684                 qeth_create_skb_frag(skb, data, data_len);
5685         }
5686
5687         /* Step forward to next element: */
5688         if (skb_len) {
5689             if (qeth_is_last_sbale(element)) {
5690                 QETH_CARD_TEXT(card, 4, "unexeob");
5691                 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5692                 if (skb) {
5693                     if (uses_frags)
5694                         napi_free_frags(napi);
5695                     else
5696                         kfree_skb(skb);
5697                     QETH_CARD_STAT_INC(card,
5698                                rx_length_errors);
5699                 }
5700                 return -EMSGSIZE;
5701             }
5702             element++;
5703             offset = 0;
5704         }
5705     }
5706
5707     /* This packet was skipped, go get another one: */
5708     if (!skb)
5709         goto next_packet;
5710
5711     *element_no = element - &buffer->element[0];
5712     *__offset = offset;
5713
5714 #if IS_ENABLED(CONFIG_QETH_L3)
5715     if (hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER3)
5716         qeth_l3_rebuild_skb(card, skb, hdr);
5717 #endif
5718
5719     qeth_receive_skb(card, skb, uses_frags, is_cso);
5720     return 0;
5721 }
5722
5723 static unsigned int qeth_extract_skbs(struct qeth_card *card, int budget,
5724                       struct qeth_qdio_buffer *buf, bool *done)
5725 {
5726     unsigned int work_done = 0;
5727
5728     while (budget) {
5729         if (qeth_extract_skb(card, buf, &card->rx.buf_element,
5730                      &card->rx.e_offset)) {
5731             *done = true;
5732             break;
5733         }
5734
5735         work_done++;
5736         budget--;
5737     }
5738
5739     return work_done;
5740 }
5741
5742 static unsigned int qeth_rx_poll(struct qeth_card *card, int budget)
5743 {
5744     struct qeth_rx *ctx = &card->rx;
5745     unsigned int work_done = 0;
5746
5747     while (budget > 0) {
5748         struct qeth_qdio_buffer *buffer;
5749         unsigned int skbs_done = 0;
5750         bool done = false;
5751
5752         /* Fetch completed RX buffers: */
5753         if (!card->rx.b_count) {
5754             card->rx.qdio_err = 0;
5755             card->rx.b_count =
5756                 qdio_inspect_input_queue(CARD_DDEV(card), 0,
5757                              &card->rx.b_index,
5758                              &card->rx.qdio_err);
5759             if (card->rx.b_count <= 0) {
5760                 card->rx.b_count = 0;
5761                 break;
5762             }
5763         }
5764
5765         /* Process one completed RX buffer: */
5766         buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5767         if (!(card->rx.qdio_err &&
5768               qeth_check_qdio_errors(card, buffer->buffer,
5769                          card->rx.qdio_err, "qinerr")))
5770             skbs_done = qeth_extract_skbs(card, budget, buffer,
5771                               &done);
5772         else
5773             done = true;
5774
5775         work_done += skbs_done;
5776         budget -= skbs_done;
5777
5778         if (done) {
5779             QETH_CARD_STAT_INC(card, rx_bufs);
5780             qeth_put_buffer_pool_entry(card, buffer->pool_entry);
5781             buffer->pool_entry = NULL;
5782             card->rx.b_count--;
5783             ctx->bufs_refill++;
5784             ctx->bufs_refill -= qeth_rx_refill_queue(card,
5785                                  ctx->bufs_refill);
5786
5787             /* Step forward to next buffer: */
5788             card->rx.b_index = QDIO_BUFNR(card->rx.b_index + 1);
5789             card->rx.buf_element = 0;
5790             card->rx.e_offset = 0;
5791         }
5792     }
5793
5794     return work_done;
5795 }
5796
5797 static void qeth_cq_poll(struct qeth_card *card)
5798 {
5799     unsigned int work_done = 0;
5800
5801     while (work_done < QDIO_MAX_BUFFERS_PER_Q) {
5802         unsigned int start, error;
5803         int completed;
5804
5805         completed = qdio_inspect_input_queue(CARD_DDEV(card), 1, &start,
5806                              &error);
5807         if (completed <= 0)
5808             return;
5809
5810         qeth_qdio_cq_handler(card, error, 1, start, completed);
5811         work_done += completed;
5812     }
5813 }
5814
5815 int qeth_poll(struct napi_struct *napi, int budget)
5816 {
5817     struct qeth_card *card = container_of(napi, struct qeth_card, napi);
5818     unsigned int work_done;
5819
5820     work_done = qeth_rx_poll(card, budget);
5821
5822     if (qeth_use_tx_irqs(card)) {
5823         struct qeth_qdio_out_q *queue;
5824         unsigned int i;
5825
5826         qeth_for_each_output_queue(card, queue, i) {
5827             if (!qeth_out_queue_is_empty(queue))
5828                 napi_schedule(&queue->napi);
5829         }
5830     }
5831
5832     if (card->options.cq == QETH_CQ_ENABLED)
5833         qeth_cq_poll(card);
5834
5835     if (budget) {
5836         struct qeth_rx *ctx = &card->rx;
5837
5838         /* Process any substantial refill backlog: */
5839         ctx->bufs_refill -= qeth_rx_refill_queue(card, ctx->bufs_refill);
5840
5841         /* Exhausted the RX budget. Keep IRQ disabled, we get called again. */
5842         if (work_done >= budget)
5843             return work_done;
5844     }
5845
5846     if (napi_complete_done(napi, work_done) &&
5847         qdio_start_irq(CARD_DDEV(card)))
5848         napi_schedule(napi);
5849
5850     return work_done;
5851 }
5852 EXPORT_SYMBOL_GPL(qeth_poll);
5853
5854 static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue,
5855                  unsigned int bidx, unsigned int qdio_error,
5856                  int budget)
5857 {
5858     struct qeth_qdio_out_buffer *buffer = queue->bufs[bidx];
5859     u8 sflags = buffer->buffer->element[15].sflags;
5860     struct qeth_card *card = queue->card;
5861     bool error = !!qdio_error;
5862
5863     if (qdio_error == QDIO_ERROR_SLSB_PENDING) {
5864         struct qaob *aob = buffer->aob;
5865         struct qeth_qaob_priv1 *priv;
5866         enum iucv_tx_notify notify;
5867
5868         if (!aob) {
5869             netdev_WARN_ONCE(card->dev,
5870                      "Pending TX buffer %#x without QAOB on TX queue %u\n",
5871                      bidx, queue->queue_no);
5872             qeth_schedule_recovery(card);
5873             return;
5874         }
5875
5876         QETH_CARD_TEXT_(card, 5, "pel%u", bidx);
5877
5878         priv = (struct qeth_qaob_priv1 *)&aob->user1;
5879         /* QAOB hasn't completed yet: */
5880         if (xchg(&priv->state, QETH_QAOB_PENDING) != QETH_QAOB_DONE) {
5881             qeth_notify_skbs(queue, buffer, TX_NOTIFY_PENDING);
5882
5883             /* Prepare the queue slot for immediate re-use: */
5884             qeth_scrub_qdio_buffer(buffer->buffer, queue->max_elements);
5885             if (qeth_alloc_out_buf(queue, bidx, GFP_ATOMIC)) {
5886                 QETH_CARD_TEXT(card, 2, "outofbuf");
5887                 qeth_schedule_recovery(card);
5888             }
5889
5890             list_add(&buffer->list_entry, &queue->pending_bufs);
5891             /* Skip clearing the buffer: */
5892             return;
5893         }
5894
5895         /* QAOB already completed: */
5896         notify = qeth_compute_cq_notification(aob->aorc, 0);
5897         qeth_notify_skbs(queue, buffer, notify);
5898         error = !!aob->aorc;
5899         memset(aob, 0, sizeof(*aob));
5900     } else if (card->options.cq == QETH_CQ_ENABLED) {
5901         qeth_notify_skbs(queue, buffer,
5902                  qeth_compute_cq_notification(sflags, 0));
5903     }
5904
5905     qeth_clear_output_buffer(queue, buffer, error, budget);
5906 }
5907
5908 static int qeth_tx_poll(struct napi_struct *napi, int budget)
5909 {
5910     struct qeth_qdio_out_q *queue = qeth_napi_to_out_queue(napi);
5911     unsigned int queue_no = queue->queue_no;
5912     struct qeth_card *card = queue->card;
5913     struct net_device *dev = card->dev;
5914     unsigned int work_done = 0;
5915     struct netdev_queue *txq;
5916
5917     if (IS_IQD(card))
5918         txq = netdev_get_tx_queue(dev, qeth_iqd_translate_txq(dev, queue_no));
5919     else
5920         txq = netdev_get_tx_queue(dev, queue_no);
5921
5922     while (1) {
5923         unsigned int start, error, i;
5924         unsigned int packets = 0;
5925         unsigned int bytes = 0;
5926         int completed;
5927
5928         qeth_tx_complete_pending_bufs(card, queue, false, budget);
5929
5930         if (qeth_out_queue_is_empty(queue)) {
5931             napi_complete(napi);
5932             return 0;
5933         }
5934
5935         /* Give the CPU a breather: */
5936         if (work_done >= QDIO_MAX_BUFFERS_PER_Q) {
5937             QETH_TXQ_STAT_INC(queue, completion_yield);
5938             if (napi_complete_done(napi, 0))
5939                 napi_schedule(napi);
5940             return 0;
5941         }
5942
5943         completed = qdio_inspect_output_queue(CARD_DDEV(card), queue_no,
5944                               &start, &error);
5945         if (completed <= 0) {
5946             /* Ensure we see TX completion for pending work: */
5947             if (napi_complete_done(napi, 0) &&
5948                 !atomic_read(&queue->set_pci_flags_count))
5949                 qeth_tx_arm_timer(queue, queue->rescan_usecs);
5950             return 0;
5951         }
5952
5953         for (i = start; i < start + completed; i++) {
5954             struct qeth_qdio_out_buffer *buffer;
5955             unsigned int bidx = QDIO_BUFNR(i);
5956
5957             buffer = queue->bufs[bidx];
5958             packets += buffer->frames;
5959             bytes += buffer->bytes;
5960
5961             qeth_handle_send_error(card, buffer, error);
5962             if (IS_IQD(card))
5963                 qeth_iqd_tx_complete(queue, bidx, error, budget);
5964             else
5965                 qeth_clear_output_buffer(queue, buffer, error,
5966                              budget);
5967         }
5968
5969         atomic_sub(completed, &queue->used_buffers);
5970         work_done += completed;
5971         if (IS_IQD(card))
5972             netdev_tx_completed_queue(txq, packets, bytes);
5973         else
5974             qeth_check_outbound_queue(queue);
5975
5976         /* xmit may have observed the full-condition, but not yet
5977          * stopped the txq. In which case the code below won't trigger.
5978          * So before returning, xmit will re-check the txq's fill level
5979          * and wake it up if needed.
5980          */
5981         if (netif_tx_queue_stopped(txq) &&
5982             !qeth_out_queue_is_full(queue))
5983             netif_tx_wake_queue(txq);
5984     }
5985 }
5986
5987 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
5988 {
5989     if (!cmd->hdr.return_code)
5990         cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5991     return cmd->hdr.return_code;
5992 }
5993
5994 static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
5995                     struct qeth_reply *reply,
5996                     unsigned long data)
5997 {
5998     struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5999     struct qeth_ipa_caps *caps = reply->param;
6000
6001     if (qeth_setassparms_inspect_rc(cmd))
6002         return -EIO;
6003
6004     caps->supported = cmd->data.setassparms.data.caps.supported;
6005     caps->enabled = cmd->data.setassparms.data.caps.enabled;
6006     return 0;
6007 }
6008
6009 int qeth_setassparms_cb(struct qeth_card *card,
6010             struct qeth_reply *reply, unsigned long data)
6011 {
6012     struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6013
6014     QETH_CARD_TEXT(card, 4, "defadpcb");
6015
6016     if (cmd->hdr.return_code)
6017         return -EIO;
6018
6019     cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
6020     if (cmd->hdr.prot_version == QETH_PROT_IPV4)
6021         card->options.ipa4.enabled = cmd->hdr.assists.enabled;
6022     if (cmd->hdr.prot_version == QETH_PROT_IPV6)
6023         card->options.ipa6.enabled = cmd->hdr.assists.enabled;
6024     return 0;
6025 }
6026 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
6027
6028 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
6029                          enum qeth_ipa_funcs ipa_func,
6030                          u16 cmd_code,
6031                          unsigned int data_length,
6032                          enum qeth_prot_versions prot)
6033 {
6034     struct qeth_ipacmd_setassparms *setassparms;
6035     struct qeth_ipacmd_setassparms_hdr *hdr;
6036     struct qeth_cmd_buffer *iob;
6037
6038     QETH_CARD_TEXT(card, 4, "getasscm");
6039     iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETASSPARMS, prot,
6040                  data_length +
6041                  offsetof(struct qeth_ipacmd_setassparms,
6042                       data));
6043     if (!iob)
6044         return NULL;
6045
6046     setassparms = &__ipa_cmd(iob)->data.setassparms;
6047     setassparms->assist_no = ipa_func;
6048
6049     hdr = &setassparms->hdr;
6050     hdr->length = sizeof(*hdr) + data_length;
6051     hdr->command_code = cmd_code;
6052     return iob;
6053 }
6054 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
6055
6056 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
6057                       enum qeth_ipa_funcs ipa_func,
6058                       u16 cmd_code, u32 *data,
6059                       enum qeth_prot_versions prot)
6060 {
6061     unsigned int length = data ? SETASS_DATA_SIZEOF(flags_32bit) : 0;
6062     struct qeth_cmd_buffer *iob;
6063
6064     QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
6065     iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
6066     if (!iob)
6067         return -ENOMEM;
6068
6069     if (data)
6070         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = *data;
6071     return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL);
6072 }
6073 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
6074
6075 static void qeth_unregister_dbf_views(void)
6076 {
6077     int x;
6078
6079     for (x = 0; x < QETH_DBF_INFOS; x++) {
6080         debug_unregister(qeth_dbf[x].id);
6081         qeth_dbf[x].id = NULL;
6082     }
6083 }
6084
6085 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
6086 {
6087     char dbf_txt_buf[32];
6088     va_list args;
6089
6090     if (!debug_level_enabled(id, level))
6091         return;
6092     va_start(args, fmt);
6093     vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
6094     va_end(args);
6095     debug_text_event(id, level, dbf_txt_buf);
6096 }
6097 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
6098
6099 static int qeth_register_dbf_views(void)
6100 {
6101     int ret;
6102     int x;
6103
6104     for (x = 0; x < QETH_DBF_INFOS; x++) {
6105         /* register the areas */
6106         qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
6107                         qeth_dbf[x].pages,
6108                         qeth_dbf[x].areas,
6109                         qeth_dbf[x].len);
6110         if (qeth_dbf[x].id == NULL) {
6111             qeth_unregister_dbf_views();
6112             return -ENOMEM;
6113         }
6114
6115         /* register a view */
6116         ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
6117         if (ret) {
6118             qeth_unregister_dbf_views();
6119             return ret;
6120         }
6121
6122         /* set a passing level */
6123         debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
6124     }
6125
6126     return 0;
6127 }
6128
6129 static DEFINE_MUTEX(qeth_mod_mutex);    /* for synchronized module loading */
6130
6131 int qeth_setup_discipline(struct qeth_card *card,
6132               enum qeth_discipline_id discipline)
6133 {
6134     int rc;
6135
6136     mutex_lock(&qeth_mod_mutex);
6137     switch (discipline) {
6138     case QETH_DISCIPLINE_LAYER3:
6139         card->discipline = try_then_request_module(
6140             symbol_get(qeth_l3_discipline), "qeth_l3");
6141         break;
6142     case QETH_DISCIPLINE_LAYER2:
6143         card->discipline = try_then_request_module(
6144             symbol_get(qeth_l2_discipline), "qeth_l2");
6145         break;
6146     default:
6147         break;
6148     }
6149     mutex_unlock(&qeth_mod_mutex);
6150
6151     if (!card->discipline) {
6152         dev_err(&card->gdev->dev, "There is no kernel module to "
6153             "support discipline %d\n", discipline);
6154         return -EINVAL;
6155     }
6156
6157     rc = card->discipline->setup(card->gdev);
6158     if (rc) {
6159         if (discipline == QETH_DISCIPLINE_LAYER2)
6160             symbol_put(qeth_l2_discipline);
6161         else
6162             symbol_put(qeth_l3_discipline);
6163         card->discipline = NULL;
6164
6165         return rc;
6166     }
6167
6168     card->options.layer = discipline;
6169     return 0;
6170 }
6171
6172 void qeth_remove_discipline(struct qeth_card *card)
6173 {
6174     card->discipline->remove(card->gdev);
6175
6176     if (IS_LAYER2(card))
6177         symbol_put(qeth_l2_discipline);
6178     else
6179         symbol_put(qeth_l3_discipline);
6180     card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
6181     card->discipline = NULL;
6182 }
6183
6184 static const struct device_type qeth_generic_devtype = {
6185     .name = "qeth_generic",
6186 };
6187
6188 #define DBF_NAME_LEN    20
6189
6190 struct qeth_dbf_entry {
6191     char dbf_name[DBF_NAME_LEN];
6192     debug_info_t *dbf_info;
6193     struct list_head dbf_list;
6194 };
6195
6196 static LIST_HEAD(qeth_dbf_list);
6197 static DEFINE_MUTEX(qeth_dbf_list_mutex);
6198
6199 static debug_info_t *qeth_get_dbf_entry(char *name)
6200 {
6201     struct qeth_dbf_entry *entry;
6202     debug_info_t *rc = NULL;
6203
6204     mutex_lock(&qeth_dbf_list_mutex);
6205     list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
6206         if (strcmp(entry->dbf_name, name) == 0) {
6207             rc = entry->dbf_info;
6208             break;
6209         }
6210     }
6211     mutex_unlock(&qeth_dbf_list_mutex);
6212     return rc;
6213 }
6214
6215 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
6216 {
6217     struct qeth_dbf_entry *new_entry;
6218
6219     card->debug = debug_register(name, 2, 1, 8);
6220     if (!card->debug) {
6221         QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
6222         goto err;
6223     }
6224     if (debug_register_view(card->debug, &debug_hex_ascii_view))
6225         goto err_dbg;
6226     new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
6227     if (!new_entry)
6228         goto err_dbg;
6229     strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
6230     new_entry->dbf_info = card->debug;
6231     mutex_lock(&qeth_dbf_list_mutex);
6232     list_add(&new_entry->dbf_list, &qeth_dbf_list);
6233     mutex_unlock(&qeth_dbf_list_mutex);
6234
6235     return 0;
6236
6237 err_dbg:
6238     debug_unregister(card->debug);
6239 err:
6240     return -ENOMEM;
6241 }
6242
6243 static void qeth_clear_dbf_list(void)
6244 {
6245     struct qeth_dbf_entry *entry, *tmp;
6246
6247     mutex_lock(&qeth_dbf_list_mutex);
6248     list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
6249         list_del(&entry->dbf_list);
6250         debug_unregister(entry->dbf_info);
6251         kfree(entry);
6252     }
6253     mutex_unlock(&qeth_dbf_list_mutex);
6254 }
6255
6256 static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
6257 {
6258     struct net_device *dev;
6259     struct qeth_priv *priv;
6260
6261     switch (card->info.type) {
6262     case QETH_CARD_TYPE_IQD:
6263         dev = alloc_netdev_mqs(sizeof(*priv), "hsi%d", NET_NAME_UNKNOWN,
6264                        ether_setup, QETH_MAX_OUT_QUEUES, 1);
6265         break;
6266     case QETH_CARD_TYPE_OSM:
6267         dev = alloc_etherdev(sizeof(*priv));
6268         break;
6269     default:
6270         dev = alloc_etherdev_mqs(sizeof(*priv), QETH_MAX_OUT_QUEUES, 1);
6271     }
6272
6273     if (!dev)
6274         return NULL;
6275
6276     priv = netdev_priv(dev);
6277     priv->rx_copybreak = QETH_RX_COPYBREAK;
6278     priv->tx_wanted_queues = IS_IQD(card) ? QETH_IQD_MIN_TXQ : 1;
6279
6280     dev->ml_priv = card;
6281     dev->watchdog_timeo = QETH_TX_TIMEOUT;
6282     dev->min_mtu = 576;
6283      /* initialized when device first goes online: */
6284     dev->max_mtu = 0;
6285     dev->mtu = 0;
6286     SET_NETDEV_DEV(dev, &card->gdev->dev);
6287     netif_carrier_off(dev);
6288
6289     dev->ethtool_ops = &qeth_ethtool_ops;
6290     dev->priv_flags &= ~IFF_TX_SKB_SHARING;
6291     dev->hw_features |= NETIF_F_SG;
6292     dev->vlan_features |= NETIF_F_SG;
6293     if (IS_IQD(card))
6294         dev->features |= NETIF_F_SG;
6295
6296     return dev;
6297 }
6298
6299 struct net_device *qeth_clone_netdev(struct net_device *orig)
6300 {
6301     struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
6302
6303     if (!clone)
6304         return NULL;
6305
6306     clone->dev_port = orig->dev_port;
6307     return clone;
6308 }
6309
6310 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
6311 {
6312     struct qeth_card *card;
6313     struct device *dev;
6314     int rc;
6315     enum qeth_discipline_id enforced_disc;
6316     char dbf_name[DBF_NAME_LEN];
6317
6318     QETH_DBF_TEXT(SETUP, 2, "probedev");
6319
6320     dev = &gdev->dev;
6321     if (!get_device(dev))
6322         return -ENODEV;
6323
6324     QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
6325
6326     card = qeth_alloc_card(gdev);
6327     if (!card) {
6328         QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
6329         rc = -ENOMEM;
6330         goto err_dev;
6331     }
6332
6333     snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
6334         dev_name(&gdev->dev));
6335     card->debug = qeth_get_dbf_entry(dbf_name);
6336     if (!card->debug) {
6337         rc = qeth_add_dbf_entry(card, dbf_name);
6338         if (rc)
6339             goto err_card;
6340     }
6341
6342     qeth_setup_card(card);
6343     card->dev = qeth_alloc_netdev(card);
6344     if (!card->dev) {
6345         rc = -ENOMEM;
6346         goto err_card;
6347     }
6348
6349     qeth_determine_capabilities(card);
6350     qeth_set_blkt_defaults(card);
6351
6352     card->qdio.in_q = qeth_alloc_qdio_queue();
6353     if (!card->qdio.in_q) {
6354         rc = -ENOMEM;
6355         goto err_rx_queue;
6356     }
6357
6358     card->qdio.no_out_queues = card->dev->num_tx_queues;
6359     rc = qeth_update_from_chp_desc(card);
6360     if (rc)
6361         goto err_chp_desc;
6362
6363     gdev->dev.groups = qeth_dev_groups;
6364
6365     enforced_disc = qeth_enforce_discipline(card);
6366     switch (enforced_disc) {
6367     case QETH_DISCIPLINE_UNDETERMINED:
6368         gdev->dev.type = &qeth_generic_devtype;
6369         break;
6370     default:
6371         card->info.layer_enforced = true;
6372         /* It's so early that we don't need the discipline_mutex yet. */
6373         rc = qeth_setup_discipline(card, enforced_disc);
6374         if (rc)
6375             goto err_setup_disc;
6376
6377         break;
6378     }
6379
6380     return 0;
6381
6382 err_setup_disc:
6383 err_chp_desc:
6384     qeth_free_qdio_queue(card->qdio.in_q);
6385 err_rx_queue:
6386     free_netdev(card->dev);
6387 err_card:
6388     qeth_core_free_card(card);
6389 err_dev:
6390     put_device(dev);
6391     return rc;
6392 }
6393
6394 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
6395 {
6396     struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6397
6398     QETH_CARD_TEXT(card, 2, "removedv");
6399
6400     mutex_lock(&card->discipline_mutex);
6401     if (card->discipline)
6402         qeth_remove_discipline(card);
6403     mutex_unlock(&card->discipline_mutex);
6404
6405     qeth_free_qdio_queues(card);
6406
6407     qeth_free_qdio_queue(card->qdio.in_q);
6408     free_netdev(card->dev);
6409     qeth_core_free_card(card);
6410     put_device(&gdev->dev);
6411 }
6412
6413 static int qeth_core_set_online(struct ccwgroup_device *gdev)
6414 {
6415     struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6416     int rc = 0;
6417     enum qeth_discipline_id def_discipline;
6418
6419     mutex_lock(&card->discipline_mutex);
6420     if (!card->discipline) {
6421         def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
6422                         QETH_DISCIPLINE_LAYER2;
6423         rc = qeth_setup_discipline(card, def_discipline);
6424         if (rc)
6425             goto err;
6426     }
6427
6428     rc = qeth_set_online(card, card->discipline);
6429
6430 err:
6431     mutex_unlock(&card->discipline_mutex);
6432     return rc;
6433 }
6434
6435 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
6436 {
6437     struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6438     int rc;
6439
6440     mutex_lock(&card->discipline_mutex);
6441     rc = qeth_set_offline(card, card->discipline, false);
6442     mutex_unlock(&card->discipline_mutex);
6443
6444     return rc;
6445 }
6446
6447 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
6448 {
6449     struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6450
6451     qeth_set_allowed_threads(card, 0, 1);
6452     if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
6453         qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
6454     qeth_qdio_clear_card(card, 0);
6455     qeth_drain_output_queues(card);
6456     qdio_free(CARD_DDEV(card));
6457 }
6458
6459 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
6460                size_t count)
6461 {
6462     int err;
6463
6464     err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
6465                   buf);
6466
6467     return err ? err : count;
6468 }
6469 static DRIVER_ATTR_WO(group);
6470
6471 static struct attribute *qeth_drv_attrs[] = {
6472     &driver_attr_group.attr,
6473     NULL,
6474 };
6475 static struct attribute_group qeth_drv_attr_group = {
6476     .attrs = qeth_drv_attrs,
6477 };
6478 static const struct attribute_group *qeth_drv_attr_groups[] = {
6479     &qeth_drv_attr_group,
6480     NULL,
6481 };
6482
6483 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
6484     .driver = {
6485         .groups = qeth_drv_attr_groups,
6486         .owner = THIS_MODULE,
6487         .name = "qeth",
6488     },
6489     .ccw_driver = &qeth_ccw_driver,
6490     .setup = qeth_core_probe_device,
6491     .remove = qeth_core_remove_device,
6492     .set_online = qeth_core_set_online,
6493     .set_offline = qeth_core_set_offline,
6494     .shutdown = qeth_core_shutdown,
6495 };
6496
6497 int qeth_siocdevprivate(struct net_device *dev, struct ifreq *rq, void __user *data, int cmd)
6498 {
6499     struct qeth_card *card = dev->ml_priv;
6500     int rc = 0;
6501
6502     switch (cmd) {
6503     case SIOC_QETH_ADP_SET_SNMP_CONTROL:
6504         rc = qeth_snmp_command(card, data);
6505         break;
6506     case SIOC_QETH_GET_CARD_TYPE:
6507         if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) &&
6508             !IS_VM_NIC(card))
6509             return 1;
6510         return 0;
6511     case SIOC_QETH_QUERY_OAT:
6512         rc = qeth_query_oat_command(card, data);
6513         break;
6514     default:
6515         rc = -EOPNOTSUPP;
6516     }
6517     if (rc)
6518         QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
6519     return rc;
6520 }
6521 EXPORT_SYMBOL_GPL(qeth_siocdevprivate);
6522
6523 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
6524 {
6525     struct qeth_card *card = dev->ml_priv;
6526     struct mii_ioctl_data *mii_data;
6527     int rc = 0;
6528
6529     switch (cmd) {
6530     case SIOCGMIIPHY:
6531         mii_data = if_mii(rq);
6532         mii_data->phy_id = 0;
6533         break;
6534     case SIOCGMIIREG:
6535         mii_data = if_mii(rq);
6536         if (mii_data->phy_id != 0)
6537             rc = -EINVAL;
6538         else
6539             mii_data->val_out = qeth_mdio_read(dev,
6540                 mii_data->phy_id, mii_data->reg_num);
6541         break;
6542     default:
6543         return -EOPNOTSUPP;
6544     }
6545     if (rc)
6546         QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
6547     return rc;
6548 }
6549 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
6550
6551 static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply,
6552                   unsigned long data)
6553 {
6554     struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6555     u32 *features = reply->param;
6556
6557     if (qeth_setassparms_inspect_rc(cmd))
6558         return -EIO;
6559
6560     *features = cmd->data.setassparms.data.flags_32bit;
6561     return 0;
6562 }
6563
6564 static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6565                  enum qeth_prot_versions prot)
6566 {
6567     return qeth_send_simple_setassparms_prot(card, cstype, IPA_CMD_ASS_STOP,
6568                          NULL, prot);
6569 }
6570
6571 static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6572                 enum qeth_prot_versions prot, u8 *lp2lp)
6573 {
6574     u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
6575     struct qeth_cmd_buffer *iob;
6576     struct qeth_ipa_caps caps;
6577     u32 features;
6578     int rc;
6579
6580     /* some L3 HW requires combined L3+L4 csum offload: */
6581     if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 &&
6582         cstype == IPA_OUTBOUND_CHECKSUM)
6583         required_features |= QETH_IPA_CHECKSUM_IP_HDR;
6584
6585     iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0,
6586                        prot);
6587     if (!iob)
6588         return -ENOMEM;
6589
6590     rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features);
6591     if (rc)
6592         return rc;
6593
6594     if ((required_features & features) != required_features) {
6595         qeth_set_csum_off(card, cstype, prot);
6596         return -EOPNOTSUPP;
6597     }
6598
6599     iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
6600                        SETASS_DATA_SIZEOF(flags_32bit),
6601                        prot);
6602     if (!iob) {
6603         qeth_set_csum_off(card, cstype, prot);
6604         return -ENOMEM;
6605     }
6606
6607     if (features & QETH_IPA_CHECKSUM_LP2LP)
6608         required_features |= QETH_IPA_CHECKSUM_LP2LP;
6609     __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features;
6610     rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6611     if (rc) {
6612         qeth_set_csum_off(card, cstype, prot);
6613         return rc;
6614     }
6615
6616     if (!qeth_ipa_caps_supported(&caps, required_features) ||
6617         !qeth_ipa_caps_enabled(&caps, required_features)) {
6618         qeth_set_csum_off(card, cstype, prot);
6619         return -EOPNOTSUPP;
6620     }
6621
6622     dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
6623          cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
6624
6625     if (lp2lp)
6626         *lp2lp = qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP);
6627
6628     return 0;
6629 }
6630
6631 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
6632                  enum qeth_prot_versions prot, u8 *lp2lp)
6633 {
6634     return on ? qeth_set_csum_on(card, cstype, prot, lp2lp) :
6635             qeth_set_csum_off(card, cstype, prot);
6636 }
6637
6638 static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
6639                  unsigned long data)
6640 {
6641     struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6642     struct qeth_tso_start_data *tso_data = reply->param;
6643
6644     if (qeth_setassparms_inspect_rc(cmd))
6645         return -EIO;
6646
6647     tso_data->mss = cmd->data.setassparms.data.tso.mss;
6648     tso_data->supported = cmd->data.setassparms.data.tso.supported;
6649     return 0;
6650 }
6651
6652 static int qeth_set_tso_off(struct qeth_card *card,
6653                 enum qeth_prot_versions prot)
6654 {
6655     return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
6656                          IPA_CMD_ASS_STOP, NULL, prot);
6657 }
6658
6659 static int qeth_set_tso_on(struct qeth_card *card,
6660                enum qeth_prot_versions prot)
6661 {
6662     struct qeth_tso_start_data tso_data;
6663     struct qeth_cmd_buffer *iob;
6664     struct qeth_ipa_caps caps;
6665     int rc;
6666
6667     iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6668                        IPA_CMD_ASS_START, 0, prot);
6669     if (!iob)
6670         return -ENOMEM;
6671
6672     rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data);
6673     if (rc)
6674         return rc;
6675
6676     if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
6677         qeth_set_tso_off(card, prot);
6678         return -EOPNOTSUPP;
6679     }
6680
6681     iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6682                        IPA_CMD_ASS_ENABLE,
6683                        SETASS_DATA_SIZEOF(caps), prot);
6684     if (!iob) {
6685         qeth_set_tso_off(card, prot);
6686         return -ENOMEM;
6687     }
6688
6689     /* enable TSO capability */
6690     __ipa_cmd(iob)->data.setassparms.data.caps.enabled =
6691         QETH_IPA_LARGE_SEND_TCP;
6692     rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6693     if (rc) {
6694         qeth_set_tso_off(card, prot);
6695         return rc;
6696     }
6697
6698     if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
6699         !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
6700         qeth_set_tso_off(card, prot);
6701         return -EOPNOTSUPP;
6702     }
6703
6704     dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
6705          tso_data.mss);
6706     return 0;
6707 }
6708
6709 static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
6710                 enum qeth_prot_versions prot)
6711 {
6712     return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot);
6713 }
6714
6715 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6716 {
6717     int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6718     int rc_ipv6;
6719
6720     if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6721         rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6722                         QETH_PROT_IPV4, NULL);
6723     if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6724         /* no/one Offload Assist available, so the rc is trivial */
6725         return rc_ipv4;
6726
6727     rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6728                     QETH_PROT_IPV6, NULL);
6729
6730     if (on)
6731         /* enable: success if any Assist is active */
6732         return (rc_ipv6) ? rc_ipv4 : 0;
6733
6734     /* disable: failure if any Assist is still active */
6735     return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6736 }
6737
6738 /**
6739  * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
6740  * @dev:    a net_device
6741  */
6742 void qeth_enable_hw_features(struct net_device *dev)
6743 {
6744     struct qeth_card *card = dev->ml_priv;
6745     netdev_features_t features;
6746
6747     features = dev->features;
6748     /* force-off any feature that might need an IPA sequence.
6749      * netdev_update_features() will restart them.
6750      */
6751     dev->features &= ~dev->hw_features;
6752     /* toggle VLAN filter, so that VIDs are re-programmed: */
6753     if (IS_LAYER2(card) && IS_VM_NIC(card)) {
6754         dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
6755         dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
6756     }
6757     netdev_update_features(dev);
6758     if (features != dev->features)
6759         dev_warn(&card->gdev->dev,
6760              "Device recovery failed to restore all offload features\n");
6761 }
6762 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
6763
6764 static void qeth_check_restricted_features(struct qeth_card *card,
6765                        netdev_features_t changed,
6766                        netdev_features_t actual)
6767 {
6768     netdev_features_t ipv6_features = NETIF_F_TSO6;
6769     netdev_features_t ipv4_features = NETIF_F_TSO;
6770
6771     if (!card->info.has_lp2lp_cso_v6)
6772         ipv6_features |= NETIF_F_IPV6_CSUM;
6773     if (!card->info.has_lp2lp_cso_v4)
6774         ipv4_features |= NETIF_F_IP_CSUM;
6775
6776     if ((changed & ipv6_features) && !(actual & ipv6_features))
6777         qeth_flush_local_addrs6(card);
6778     if ((changed & ipv4_features) && !(actual & ipv4_features))
6779         qeth_flush_local_addrs4(card);
6780 }
6781
6782 int qeth_set_features(struct net_device *dev, netdev_features_t features)
6783 {
6784     struct qeth_card *card = dev->ml_priv;
6785     netdev_features_t changed = dev->features ^ features;
6786     int rc = 0;
6787
6788     QETH_CARD_TEXT(card, 2, "setfeat");
6789     QETH_CARD_HEX(card, 2, &features, sizeof(features));
6790
6791     if ((changed & NETIF_F_IP_CSUM)) {
6792         rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
6793                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4,
6794                        &card->info.has_lp2lp_cso_v4);
6795         if (rc)
6796             changed ^= NETIF_F_IP_CSUM;
6797     }
6798     if (changed & NETIF_F_IPV6_CSUM) {
6799         rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
6800                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6,
6801                        &card->info.has_lp2lp_cso_v6);
6802         if (rc)
6803             changed ^= NETIF_F_IPV6_CSUM;
6804     }
6805     if (changed & NETIF_F_RXCSUM) {
6806         rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
6807         if (rc)
6808             changed ^= NETIF_F_RXCSUM;
6809     }
6810     if (changed & NETIF_F_TSO) {
6811         rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
6812                       QETH_PROT_IPV4);
6813         if (rc)
6814             changed ^= NETIF_F_TSO;
6815     }
6816     if (changed & NETIF_F_TSO6) {
6817         rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
6818                       QETH_PROT_IPV6);
6819         if (rc)
6820             changed ^= NETIF_F_TSO6;
6821     }
6822
6823     qeth_check_restricted_features(card, dev->features ^ features,
6824                        dev->features ^ changed);
6825
6826     /* everything changed successfully? */
6827     if ((dev->features ^ features) == changed)
6828         return 0;
6829     /* something went wrong. save changed features and return error */
6830     dev->features ^= changed;
6831     return -EIO;
6832 }
6833 EXPORT_SYMBOL_GPL(qeth_set_features);
6834
6835 netdev_features_t qeth_fix_features(struct net_device *dev,
6836                     netdev_features_t features)
6837 {
6838     struct qeth_card *card = dev->ml_priv;
6839
6840     QETH_CARD_TEXT(card, 2, "fixfeat");
6841     if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6842         features &= ~NETIF_F_IP_CSUM;
6843     if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
6844         features &= ~NETIF_F_IPV6_CSUM;
6845     if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
6846         !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6847         features &= ~NETIF_F_RXCSUM;
6848     if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
6849         features &= ~NETIF_F_TSO;
6850     if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
6851         features &= ~NETIF_F_TSO6;
6852
6853     QETH_CARD_HEX(card, 2, &features, sizeof(features));
6854     return features;
6855 }
6856 EXPORT_SYMBOL_GPL(qeth_fix_features);
6857
6858 netdev_features_t qeth_features_check(struct sk_buff *skb,
6859                       struct net_device *dev,
6860                       netdev_features_t features)
6861 {
6862     struct qeth_card *card = dev->ml_priv;
6863
6864     /* Traffic with local next-hop is not eligible for some offloads: */
6865     if (skb->ip_summed == CHECKSUM_PARTIAL &&
6866         READ_ONCE(card->options.isolation) != ISOLATION_MODE_FWD) {
6867         netdev_features_t restricted = 0;
6868
6869         if (skb_is_gso(skb) && !netif_needs_gso(skb, features))
6870             restricted |= NETIF_F_ALL_TSO;
6871
6872         switch (vlan_get_protocol(skb)) {
6873         case htons(ETH_P_IP):
6874             if (!card->info.has_lp2lp_cso_v4)
6875                 restricted |= NETIF_F_IP_CSUM;
6876
6877             if (restricted && qeth_next_hop_is_local_v4(card, skb))
6878                 features &= ~restricted;
6879             break;
6880         case htons(ETH_P_IPV6):
6881             if (!card->info.has_lp2lp_cso_v6)
6882                 restricted |= NETIF_F_IPV6_CSUM;
6883
6884             if (restricted && qeth_next_hop_is_local_v6(card, skb))
6885                 features &= ~restricted;
6886             break;
6887         default:
6888             break;
6889         }
6890     }
6891
6892     /* GSO segmentation builds skbs with
6893      *  a (small) linear part for the headers, and
6894      *  page frags for the data.
6895      * Compared to a linear skb, the header-only part consumes an
6896      * additional buffer element. This reduces buffer utilization, and
6897      * hurts throughput. So compress small segments into one element.
6898      */
6899     if (netif_needs_gso(skb, features)) {
6900         /* match skb_segment(): */
6901         unsigned int doffset = skb->data - skb_mac_header(skb);
6902         unsigned int hsize = skb_shinfo(skb)->gso_size;
6903         unsigned int hroom = skb_headroom(skb);
6904
6905         /* linearize only if resulting skb allocations are order-0: */
6906         if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
6907             features &= ~NETIF_F_SG;
6908     }
6909
6910     return vlan_features_check(skb, features);
6911 }
6912 EXPORT_SYMBOL_GPL(qeth_features_check);
6913
6914 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
6915 {
6916     struct qeth_card *card = dev->ml_priv;
6917     struct qeth_qdio_out_q *queue;
6918     unsigned int i;
6919
6920     QETH_CARD_TEXT(card, 5, "getstat");
6921
6922     stats->rx_packets = card->stats.rx_packets;
6923     stats->rx_bytes = card->stats.rx_bytes;
6924     stats->rx_errors = card->stats.rx_length_errors +
6925                card->stats.rx_frame_errors +
6926                card->stats.rx_fifo_errors;
6927     stats->rx_dropped = card->stats.rx_dropped_nomem +
6928                 card->stats.rx_dropped_notsupp +
6929                 card->stats.rx_dropped_runt;
6930     stats->multicast = card->stats.rx_multicast;
6931     stats->rx_length_errors = card->stats.rx_length_errors;
6932     stats->rx_frame_errors = card->stats.rx_frame_errors;
6933     stats->rx_fifo_errors = card->stats.rx_fifo_errors;
6934
6935     for (i = 0; i < card->qdio.no_out_queues; i++) {
6936         queue = card->qdio.out_qs[i];
6937
6938         stats->tx_packets += queue->stats.tx_packets;
6939         stats->tx_bytes += queue->stats.tx_bytes;
6940         stats->tx_errors += queue->stats.tx_errors;
6941         stats->tx_dropped += queue->stats.tx_dropped;
6942     }
6943 }
6944 EXPORT_SYMBOL_GPL(qeth_get_stats64);
6945
6946 #define TC_IQD_UCAST   0
6947 static void qeth_iqd_set_prio_tc_map(struct net_device *dev,
6948                      unsigned int ucast_txqs)
6949 {
6950     unsigned int prio;
6951
6952     /* IQD requires mcast traffic to be placed on a dedicated queue, and
6953      * qeth_iqd_select_queue() deals with this.
6954      * For unicast traffic, we defer the queue selection to the stack.
6955      * By installing a trivial prio map that spans over only the unicast
6956      * queues, we can encourage the stack to spread the ucast traffic evenly
6957      * without selecting the mcast queue.
6958      */
6959
6960     /* One traffic class, spanning over all active ucast queues: */
6961     netdev_set_num_tc(dev, 1);
6962     netdev_set_tc_queue(dev, TC_IQD_UCAST, ucast_txqs,
6963                 QETH_IQD_MIN_UCAST_TXQ);
6964
6965     /* Map all priorities to this traffic class: */
6966     for (prio = 0; prio <= TC_BITMASK; prio++)
6967         netdev_set_prio_tc_map(dev, prio, TC_IQD_UCAST);
6968 }
6969
6970 int qeth_set_real_num_tx_queues(struct qeth_card *card, unsigned int count)
6971 {
6972     struct net_device *dev = card->dev;
6973     int rc;
6974
6975     /* Per netif_setup_tc(), adjust the mapping first: */
6976     if (IS_IQD(card))
6977         qeth_iqd_set_prio_tc_map(dev, count - 1);
6978
6979     rc = netif_set_real_num_tx_queues(dev, count);
6980
6981     if (rc && IS_IQD(card))
6982         qeth_iqd_set_prio_tc_map(dev, dev->real_num_tx_queues - 1);
6983
6984     return rc;
6985 }
6986 EXPORT_SYMBOL_GPL(qeth_set_real_num_tx_queues);
6987
6988 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
6989               u8 cast_type, struct net_device *sb_dev)
6990 {
6991     u16 txq;
6992
6993     if (cast_type != RTN_UNICAST)
6994         return QETH_IQD_MCAST_TXQ;
6995     if (dev->real_num_tx_queues == QETH_IQD_MIN_TXQ)
6996         return QETH_IQD_MIN_UCAST_TXQ;
6997
6998     txq = netdev_pick_tx(dev, skb, sb_dev);
6999     return (txq == QETH_IQD_MCAST_TXQ) ? QETH_IQD_MIN_UCAST_TXQ : txq;
7000 }
7001 EXPORT_SYMBOL_GPL(qeth_iqd_select_queue);
7002
7003 u16 qeth_osa_select_queue(struct net_device *dev, struct sk_buff *skb,
7004               struct net_device *sb_dev)
7005 {
7006     struct qeth_card *card = dev->ml_priv;
7007
7008     if (qeth_uses_tx_prio_queueing(card))
7009         return qeth_get_priority_queue(card, skb);
7010
7011     return netdev_pick_tx(dev, skb, sb_dev);
7012 }
7013 EXPORT_SYMBOL_GPL(qeth_osa_select_queue);
7014
7015 int qeth_open(struct net_device *dev)
7016 {
7017     struct qeth_card *card = dev->ml_priv;
7018     struct qeth_qdio_out_q *queue;
7019     unsigned int i;
7020
7021     QETH_CARD_TEXT(card, 4, "qethopen");
7022
7023     card->data.state = CH_STATE_UP;
7024     netif_tx_start_all_queues(dev);
7025
7026     local_bh_disable();
7027     qeth_for_each_output_queue(card, queue, i) {
7028         netif_napi_add_tx(dev, &queue->napi, qeth_tx_poll);
7029         napi_enable(&queue->napi);
7030         napi_schedule(&queue->napi);
7031     }
7032
7033     napi_enable(&card->napi);
7034     napi_schedule(&card->napi);
7035     /* kick-start the NAPI softirq: */
7036     local_bh_enable();
7037
7038     return 0;
7039 }
7040 EXPORT_SYMBOL_GPL(qeth_open);
7041
7042 int qeth_stop(struct net_device *dev)
7043 {
7044     struct qeth_card *card = dev->ml_priv;
7045     struct qeth_qdio_out_q *queue;
7046     unsigned int i;
7047
7048     QETH_CARD_TEXT(card, 4, "qethstop");
7049
7050     napi_disable(&card->napi);
7051     cancel_delayed_work_sync(&card->buffer_reclaim_work);
7052     qdio_stop_irq(CARD_DDEV(card));
7053
7054     /* Quiesce the NAPI instances: */
7055     qeth_for_each_output_queue(card, queue, i)
7056         napi_disable(&queue->napi);
7057
7058     /* Stop .ndo_start_xmit, might still access queue->napi. */
7059     netif_tx_disable(dev);
7060
7061     qeth_for_each_output_queue(card, queue, i) {
7062         del_timer_sync(&queue->timer);
7063         /* Queues may get re-allocated, so remove the NAPIs. */
7064         netif_napi_del(&queue->napi);
7065     }
7066
7067     return 0;
7068 }
7069 EXPORT_SYMBOL_GPL(qeth_stop);
7070
7071 static int __init qeth_core_init(void)
7072 {
7073     int rc;
7074
7075     pr_info("loading core functions\n");
7076
7077     qeth_debugfs_root = debugfs_create_dir("qeth", NULL);
7078
7079     rc = qeth_register_dbf_views();
7080     if (rc)
7081         goto dbf_err;
7082     qeth_core_root_dev = root_device_register("qeth");
7083     rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
7084     if (rc)
7085         goto register_err;
7086     qeth_core_header_cache =
7087         kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
7088                   roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
7089                   0, NULL);
7090     if (!qeth_core_header_cache) {
7091         rc = -ENOMEM;
7092         goto slab_err;
7093     }
7094     qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
7095             sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
7096     if (!qeth_qdio_outbuf_cache) {
7097         rc = -ENOMEM;
7098         goto cqslab_err;
7099     }
7100
7101     qeth_qaob_cache = kmem_cache_create("qeth_qaob",
7102                         sizeof(struct qaob),
7103                         sizeof(struct qaob),
7104                         0, NULL);
7105     if (!qeth_qaob_cache) {
7106         rc = -ENOMEM;
7107         goto qaob_err;
7108     }
7109
7110     rc = ccw_driver_register(&qeth_ccw_driver);
7111     if (rc)
7112         goto ccw_err;
7113     rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
7114     if (rc)
7115         goto ccwgroup_err;
7116
7117     return 0;
7118
7119 ccwgroup_err:
7120     ccw_driver_unregister(&qeth_ccw_driver);
7121 ccw_err:
7122     kmem_cache_destroy(qeth_qaob_cache);
7123 qaob_err:
7124     kmem_cache_destroy(qeth_qdio_outbuf_cache);
7125 cqslab_err:
7126     kmem_cache_destroy(qeth_core_header_cache);
7127 slab_err:
7128     root_device_unregister(qeth_core_root_dev);
7129 register_err:
7130     qeth_unregister_dbf_views();
7131 dbf_err:
7132     debugfs_remove_recursive(qeth_debugfs_root);
7133     pr_err("Initializing the qeth device driver failed\n");
7134     return rc;
7135 }
7136
7137 static void __exit qeth_core_exit(void)
7138 {
7139     qeth_clear_dbf_list();
7140     ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
7141     ccw_driver_unregister(&qeth_ccw_driver);
7142     kmem_cache_destroy(qeth_qaob_cache);
7143     kmem_cache_destroy(qeth_qdio_outbuf_cache);
7144     kmem_cache_destroy(qeth_core_header_cache);
7145     root_device_unregister(qeth_core_root_dev);
7146     qeth_unregister_dbf_views();
7147     debugfs_remove_recursive(qeth_debugfs_root);
7148     pr_info("core functions removed\n");
7149 }
7150
7151 module_init(qeth_core_init);
7152 module_exit(qeth_core_exit);
7153 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
7154 MODULE_DESCRIPTION("qeth core functions");
7155 MODULE_LICENSE("GPL");