Back to home page

OSCL-LXR
 
 

     

0001 /*
0002  * Copyright (c) 2010-2011 Atheros Communications Inc.
0003  *
0004  * Permission to use, copy, modify, and/or distribute this software for any
0005  * purpose with or without fee is hereby granted, provided that the above
0006  * copyright notice and this permission notice appear in all copies.
0007  *
0008  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
0009  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
0010  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
0011  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
0012  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
0013  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
0014  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
0015  */
0016 
0017 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
0018 
0019 #include "htc.h"
0020 
0021 static int htc_issue_send(struct htc_target *target, struct sk_buff* skb,
0022               u16 len, u8 flags, u8 epid)
0023 
0024 {
0025     struct htc_frame_hdr *hdr;
0026     struct htc_endpoint *endpoint = &target->endpoint[epid];
0027     int status;
0028 
0029     hdr = skb_push(skb, sizeof(struct htc_frame_hdr));
0030     hdr->endpoint_id = epid;
0031     hdr->flags = flags;
0032     hdr->payload_len = cpu_to_be16(len);
0033     memset(hdr->control, 0, sizeof(hdr->control));
0034 
0035     status = target->hif->send(target->hif_dev, endpoint->ul_pipeid, skb);
0036 
0037     return status;
0038 }
0039 
0040 static struct htc_endpoint *get_next_avail_ep(struct htc_endpoint *endpoint)
0041 {
0042     enum htc_endpoint_id avail_epid;
0043 
0044     for (avail_epid = (ENDPOINT_MAX - 1); avail_epid > ENDPOINT0; avail_epid--)
0045         if (endpoint[avail_epid].service_id == 0)
0046             return &endpoint[avail_epid];
0047     return NULL;
0048 }
0049 
0050 static u8 service_to_ulpipe(u16 service_id)
0051 {
0052     switch (service_id) {
0053     case WMI_CONTROL_SVC:
0054         return 4;
0055     case WMI_BEACON_SVC:
0056     case WMI_CAB_SVC:
0057     case WMI_UAPSD_SVC:
0058     case WMI_MGMT_SVC:
0059     case WMI_DATA_VO_SVC:
0060     case WMI_DATA_VI_SVC:
0061     case WMI_DATA_BE_SVC:
0062     case WMI_DATA_BK_SVC:
0063         return 1;
0064     default:
0065         return 0;
0066     }
0067 }
0068 
0069 static u8 service_to_dlpipe(u16 service_id)
0070 {
0071     switch (service_id) {
0072     case WMI_CONTROL_SVC:
0073         return 3;
0074     case WMI_BEACON_SVC:
0075     case WMI_CAB_SVC:
0076     case WMI_UAPSD_SVC:
0077     case WMI_MGMT_SVC:
0078     case WMI_DATA_VO_SVC:
0079     case WMI_DATA_VI_SVC:
0080     case WMI_DATA_BE_SVC:
0081     case WMI_DATA_BK_SVC:
0082         return 2;
0083     default:
0084         return 0;
0085     }
0086 }
0087 
0088 static void htc_process_target_rdy(struct htc_target *target,
0089                    void *buf)
0090 {
0091     struct htc_endpoint *endpoint;
0092     struct htc_ready_msg *htc_ready_msg = (struct htc_ready_msg *) buf;
0093 
0094     target->credit_size = be16_to_cpu(htc_ready_msg->credit_size);
0095 
0096     endpoint = &target->endpoint[ENDPOINT0];
0097     endpoint->service_id = HTC_CTRL_RSVD_SVC;
0098     endpoint->max_msglen = HTC_MAX_CONTROL_MESSAGE_LENGTH;
0099     atomic_inc(&target->tgt_ready);
0100     complete(&target->target_wait);
0101 }
0102 
0103 static void htc_process_conn_rsp(struct htc_target *target,
0104                  struct htc_frame_hdr *htc_hdr)
0105 {
0106     struct htc_conn_svc_rspmsg *svc_rspmsg;
0107     struct htc_endpoint *endpoint, *tmp_endpoint = NULL;
0108     u16 service_id;
0109     u16 max_msglen;
0110     enum htc_endpoint_id epid, tepid;
0111 
0112     svc_rspmsg = (struct htc_conn_svc_rspmsg *)
0113         ((void *) htc_hdr + sizeof(struct htc_frame_hdr));
0114 
0115     if (svc_rspmsg->status == HTC_SERVICE_SUCCESS) {
0116         epid = svc_rspmsg->endpoint_id;
0117         if (epid < 0 || epid >= ENDPOINT_MAX)
0118             return;
0119 
0120         service_id = be16_to_cpu(svc_rspmsg->service_id);
0121         max_msglen = be16_to_cpu(svc_rspmsg->max_msg_len);
0122         endpoint = &target->endpoint[epid];
0123 
0124         for (tepid = (ENDPOINT_MAX - 1); tepid > ENDPOINT0; tepid--) {
0125             tmp_endpoint = &target->endpoint[tepid];
0126             if (tmp_endpoint->service_id == service_id) {
0127                 tmp_endpoint->service_id = 0;
0128                 break;
0129             }
0130         }
0131 
0132         if (tepid == ENDPOINT0)
0133             return;
0134 
0135         endpoint->service_id = service_id;
0136         endpoint->max_txqdepth = tmp_endpoint->max_txqdepth;
0137         endpoint->ep_callbacks = tmp_endpoint->ep_callbacks;
0138         endpoint->ul_pipeid = tmp_endpoint->ul_pipeid;
0139         endpoint->dl_pipeid = tmp_endpoint->dl_pipeid;
0140         endpoint->max_msglen = max_msglen;
0141         target->conn_rsp_epid = epid;
0142         complete(&target->cmd_wait);
0143     } else {
0144         target->conn_rsp_epid = ENDPOINT_UNUSED;
0145     }
0146 }
0147 
0148 static int htc_config_pipe_credits(struct htc_target *target)
0149 {
0150     struct sk_buff *skb;
0151     struct htc_config_pipe_msg *cp_msg;
0152     int ret;
0153     unsigned long time_left;
0154 
0155     skb = alloc_skb(50 + sizeof(struct htc_frame_hdr), GFP_ATOMIC);
0156     if (!skb) {
0157         dev_err(target->dev, "failed to allocate send buffer\n");
0158         return -ENOMEM;
0159     }
0160     skb_reserve(skb, sizeof(struct htc_frame_hdr));
0161 
0162     cp_msg = skb_put(skb, sizeof(struct htc_config_pipe_msg));
0163 
0164     cp_msg->message_id = cpu_to_be16(HTC_MSG_CONFIG_PIPE_ID);
0165     cp_msg->pipe_id = USB_WLAN_TX_PIPE;
0166     cp_msg->credits = target->credits;
0167 
0168     target->htc_flags |= HTC_OP_CONFIG_PIPE_CREDITS;
0169 
0170     ret = htc_issue_send(target, skb, skb->len, 0, ENDPOINT0);
0171     if (ret)
0172         goto err;
0173 
0174     time_left = wait_for_completion_timeout(&target->cmd_wait, HZ);
0175     if (!time_left) {
0176         dev_err(target->dev, "HTC credit config timeout\n");
0177         return -ETIMEDOUT;
0178     }
0179 
0180     return 0;
0181 err:
0182     kfree_skb(skb);
0183     return -EINVAL;
0184 }
0185 
0186 static int htc_setup_complete(struct htc_target *target)
0187 {
0188     struct sk_buff *skb;
0189     struct htc_comp_msg *comp_msg;
0190     int ret = 0;
0191     unsigned long time_left;
0192 
0193     skb = alloc_skb(50 + sizeof(struct htc_frame_hdr), GFP_ATOMIC);
0194     if (!skb) {
0195         dev_err(target->dev, "failed to allocate send buffer\n");
0196         return -ENOMEM;
0197     }
0198     skb_reserve(skb, sizeof(struct htc_frame_hdr));
0199 
0200     comp_msg = skb_put(skb, sizeof(struct htc_comp_msg));
0201     comp_msg->msg_id = cpu_to_be16(HTC_MSG_SETUP_COMPLETE_ID);
0202 
0203     target->htc_flags |= HTC_OP_START_WAIT;
0204 
0205     ret = htc_issue_send(target, skb, skb->len, 0, ENDPOINT0);
0206     if (ret)
0207         goto err;
0208 
0209     time_left = wait_for_completion_timeout(&target->cmd_wait, HZ);
0210     if (!time_left) {
0211         dev_err(target->dev, "HTC start timeout\n");
0212         return -ETIMEDOUT;
0213     }
0214 
0215     return 0;
0216 
0217 err:
0218     kfree_skb(skb);
0219     return -EINVAL;
0220 }
0221 
0222 /* HTC APIs */
0223 
0224 int htc_init(struct htc_target *target)
0225 {
0226     int ret;
0227 
0228     ret = htc_config_pipe_credits(target);
0229     if (ret)
0230         return ret;
0231 
0232     return htc_setup_complete(target);
0233 }
0234 
0235 int htc_connect_service(struct htc_target *target,
0236              struct htc_service_connreq *service_connreq,
0237              enum htc_endpoint_id *conn_rsp_epid)
0238 {
0239     struct sk_buff *skb;
0240     struct htc_endpoint *endpoint;
0241     struct htc_conn_svc_msg *conn_msg;
0242     int ret;
0243     unsigned long time_left;
0244 
0245     /* Find an available endpoint */
0246     endpoint = get_next_avail_ep(target->endpoint);
0247     if (!endpoint) {
0248         dev_err(target->dev, "Endpoint is not available for service %d\n",
0249             service_connreq->service_id);
0250         return -EINVAL;
0251     }
0252 
0253     endpoint->service_id = service_connreq->service_id;
0254     endpoint->max_txqdepth = service_connreq->max_send_qdepth;
0255     endpoint->ul_pipeid = service_to_ulpipe(service_connreq->service_id);
0256     endpoint->dl_pipeid = service_to_dlpipe(service_connreq->service_id);
0257     endpoint->ep_callbacks = service_connreq->ep_callbacks;
0258 
0259     skb = alloc_skb(sizeof(struct htc_conn_svc_msg) +
0260                 sizeof(struct htc_frame_hdr), GFP_ATOMIC);
0261     if (!skb) {
0262         dev_err(target->dev, "Failed to allocate buf to send"
0263             "service connect req\n");
0264         return -ENOMEM;
0265     }
0266 
0267     skb_reserve(skb, sizeof(struct htc_frame_hdr));
0268 
0269     conn_msg = skb_put(skb, sizeof(struct htc_conn_svc_msg));
0270     conn_msg->service_id = cpu_to_be16(service_connreq->service_id);
0271     conn_msg->msg_id = cpu_to_be16(HTC_MSG_CONNECT_SERVICE_ID);
0272     conn_msg->con_flags = cpu_to_be16(service_connreq->con_flags);
0273     conn_msg->dl_pipeid = endpoint->dl_pipeid;
0274     conn_msg->ul_pipeid = endpoint->ul_pipeid;
0275 
0276     /* To prevent infoleak */
0277     conn_msg->svc_meta_len = 0;
0278     conn_msg->pad = 0;
0279 
0280     ret = htc_issue_send(target, skb, skb->len, 0, ENDPOINT0);
0281     if (ret)
0282         goto err;
0283 
0284     time_left = wait_for_completion_timeout(&target->cmd_wait, HZ);
0285     if (!time_left) {
0286         dev_err(target->dev, "Service connection timeout for: %d\n",
0287             service_connreq->service_id);
0288         return -ETIMEDOUT;
0289     }
0290 
0291     *conn_rsp_epid = target->conn_rsp_epid;
0292     return 0;
0293 err:
0294     kfree_skb(skb);
0295     return ret;
0296 }
0297 
0298 int htc_send(struct htc_target *target, struct sk_buff *skb)
0299 {
0300     struct ath9k_htc_tx_ctl *tx_ctl;
0301 
0302     tx_ctl = HTC_SKB_CB(skb);
0303     return htc_issue_send(target, skb, skb->len, 0, tx_ctl->epid);
0304 }
0305 
0306 int htc_send_epid(struct htc_target *target, struct sk_buff *skb,
0307           enum htc_endpoint_id epid)
0308 {
0309     return htc_issue_send(target, skb, skb->len, 0, epid);
0310 }
0311 
0312 void htc_stop(struct htc_target *target)
0313 {
0314     target->hif->stop(target->hif_dev);
0315 }
0316 
0317 void htc_start(struct htc_target *target)
0318 {
0319     target->hif->start(target->hif_dev);
0320 }
0321 
0322 void htc_sta_drain(struct htc_target *target, u8 idx)
0323 {
0324     target->hif->sta_drain(target->hif_dev, idx);
0325 }
0326 
0327 void ath9k_htc_txcompletion_cb(struct htc_target *htc_handle,
0328                    struct sk_buff *skb, bool txok)
0329 {
0330     struct htc_endpoint *endpoint;
0331     struct htc_frame_hdr *htc_hdr = NULL;
0332 
0333     if (htc_handle->htc_flags & HTC_OP_CONFIG_PIPE_CREDITS) {
0334         complete(&htc_handle->cmd_wait);
0335         htc_handle->htc_flags &= ~HTC_OP_CONFIG_PIPE_CREDITS;
0336         goto ret;
0337     }
0338 
0339     if (htc_handle->htc_flags & HTC_OP_START_WAIT) {
0340         complete(&htc_handle->cmd_wait);
0341         htc_handle->htc_flags &= ~HTC_OP_START_WAIT;
0342         goto ret;
0343     }
0344 
0345     if (skb) {
0346         htc_hdr = (struct htc_frame_hdr *) skb->data;
0347         if (htc_hdr->endpoint_id >= ARRAY_SIZE(htc_handle->endpoint))
0348             goto ret;
0349         endpoint = &htc_handle->endpoint[htc_hdr->endpoint_id];
0350         skb_pull(skb, sizeof(struct htc_frame_hdr));
0351 
0352         if (endpoint->ep_callbacks.tx) {
0353             endpoint->ep_callbacks.tx(endpoint->ep_callbacks.priv,
0354                           skb, htc_hdr->endpoint_id,
0355                           txok);
0356         } else {
0357             kfree_skb(skb);
0358         }
0359     }
0360 
0361     return;
0362 ret:
0363     kfree_skb(skb);
0364 }
0365 
0366 static void ath9k_htc_fw_panic_report(struct htc_target *htc_handle,
0367                       struct sk_buff *skb)
0368 {
0369     uint32_t *pattern = (uint32_t *)skb->data;
0370 
0371     switch (*pattern) {
0372     case 0x33221199:
0373         {
0374         struct htc_panic_bad_vaddr *htc_panic;
0375         htc_panic = (struct htc_panic_bad_vaddr *) skb->data;
0376         dev_err(htc_handle->dev, "ath: firmware panic! "
0377             "exccause: 0x%08x; pc: 0x%08x; badvaddr: 0x%08x.\n",
0378             htc_panic->exccause, htc_panic->pc,
0379             htc_panic->badvaddr);
0380         break;
0381         }
0382     case 0x33221299:
0383         {
0384         struct htc_panic_bad_epid *htc_panic;
0385         htc_panic = (struct htc_panic_bad_epid *) skb->data;
0386         dev_err(htc_handle->dev, "ath: firmware panic! "
0387             "bad epid: 0x%08x\n", htc_panic->epid);
0388         break;
0389         }
0390     default:
0391         dev_err(htc_handle->dev, "ath: unknown panic pattern!\n");
0392         break;
0393     }
0394 }
0395 
0396 /*
0397  * HTC Messages are handled directly here and the obtained SKB
0398  * is freed.
0399  *
0400  * Service messages (Data, WMI) passed to the corresponding
0401  * endpoint RX handlers, which have to free the SKB.
0402  */
0403 void ath9k_htc_rx_msg(struct htc_target *htc_handle,
0404               struct sk_buff *skb, u32 len, u8 pipe_id)
0405 {
0406     struct htc_frame_hdr *htc_hdr;
0407     enum htc_endpoint_id epid;
0408     struct htc_endpoint *endpoint;
0409     __be16 *msg_id;
0410 
0411     if (!htc_handle || !skb)
0412         return;
0413 
0414     htc_hdr = (struct htc_frame_hdr *) skb->data;
0415     epid = htc_hdr->endpoint_id;
0416 
0417     if (epid == 0x99) {
0418         ath9k_htc_fw_panic_report(htc_handle, skb);
0419         kfree_skb(skb);
0420         return;
0421     }
0422 
0423     if (epid < 0 || epid >= ENDPOINT_MAX) {
0424         if (pipe_id != USB_REG_IN_PIPE)
0425             dev_kfree_skb_any(skb);
0426         else
0427             kfree_skb(skb);
0428         return;
0429     }
0430 
0431     if (epid == ENDPOINT0) {
0432 
0433         /* Handle trailer */
0434         if (htc_hdr->flags & HTC_FLAGS_RECV_TRAILER) {
0435             if (be32_to_cpu(*(__be32 *) skb->data) == 0x00C60000)
0436                 /* Move past the Watchdog pattern */
0437                 htc_hdr = (struct htc_frame_hdr *)(skb->data + 4);
0438         }
0439 
0440         /* Get the message ID */
0441         msg_id = (__be16 *) ((void *) htc_hdr +
0442                      sizeof(struct htc_frame_hdr));
0443 
0444         /* Now process HTC messages */
0445         switch (be16_to_cpu(*msg_id)) {
0446         case HTC_MSG_READY_ID:
0447             htc_process_target_rdy(htc_handle, htc_hdr);
0448             break;
0449         case HTC_MSG_CONNECT_SERVICE_RESPONSE_ID:
0450             htc_process_conn_rsp(htc_handle, htc_hdr);
0451             break;
0452         default:
0453             break;
0454         }
0455 
0456         kfree_skb(skb);
0457 
0458     } else {
0459         if (htc_hdr->flags & HTC_FLAGS_RECV_TRAILER)
0460             skb_trim(skb, len - htc_hdr->control[0]);
0461 
0462         skb_pull(skb, sizeof(struct htc_frame_hdr));
0463 
0464         endpoint = &htc_handle->endpoint[epid];
0465         if (endpoint->ep_callbacks.rx)
0466             endpoint->ep_callbacks.rx(endpoint->ep_callbacks.priv,
0467                           skb, epid);
0468     }
0469 }
0470 
0471 struct htc_target *ath9k_htc_hw_alloc(void *hif_handle,
0472                       struct ath9k_htc_hif *hif,
0473                       struct device *dev)
0474 {
0475     struct htc_endpoint *endpoint;
0476     struct htc_target *target;
0477 
0478     target = kzalloc(sizeof(struct htc_target), GFP_KERNEL);
0479     if (!target)
0480         return NULL;
0481 
0482     init_completion(&target->target_wait);
0483     init_completion(&target->cmd_wait);
0484 
0485     target->hif = hif;
0486     target->hif_dev = hif_handle;
0487     target->dev = dev;
0488 
0489     /* Assign control endpoint pipe IDs */
0490     endpoint = &target->endpoint[ENDPOINT0];
0491     endpoint->ul_pipeid = hif->control_ul_pipe;
0492     endpoint->dl_pipeid = hif->control_dl_pipe;
0493 
0494     atomic_set(&target->tgt_ready, 0);
0495 
0496     return target;
0497 }
0498 
0499 void ath9k_htc_hw_free(struct htc_target *htc)
0500 {
0501     kfree(htc);
0502 }
0503 
0504 int ath9k_htc_hw_init(struct htc_target *target,
0505               struct device *dev, u16 devid,
0506               char *product, u32 drv_info)
0507 {
0508     if (ath9k_htc_probe_device(target, dev, devid, product, drv_info)) {
0509         pr_err("Failed to initialize the device\n");
0510         return -ENODEV;
0511     }
0512 
0513     return 0;
0514 }
0515 
0516 void ath9k_htc_hw_deinit(struct htc_target *target, bool hot_unplug)
0517 {
0518     if (target)
0519         ath9k_htc_disconnect_device(target, hot_unplug);
0520 }
[ Source navigation ] [ Diff markup ] [ Identifier search ] [ general search ]

This page was automatically generated by the 2.1.0 LXR engine.

The LXR team
Valid CSS 2.1! Valid HTML 4.01!