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0001 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
0002 /* QLogic qed NIC Driver
0003  * Copyright (c) 2015-2017  QLogic Corporation
0004  * Copyright (c) 2019-2020 Marvell International Ltd.
0005  */
0006 
0007 #include <linux/types.h>
0008 #include <asm/byteorder.h>
0009 #include <asm/param.h>
0010 #include <linux/delay.h>
0011 #include <linux/dma-mapping.h>
0012 #include <linux/etherdevice.h>
0013 #include <linux/interrupt.h>
0014 #include <linux/kernel.h>
0015 #include <linux/log2.h>
0016 #include <linux/module.h>
0017 #include <linux/pci.h>
0018 #include <linux/slab.h>
0019 #include <linux/stddef.h>
0020 #include <linux/string.h>
0021 #include <linux/workqueue.h>
0022 #include <linux/errno.h>
0023 #include <linux/list.h>
0024 #include <linux/spinlock.h>
0025 #include <linux/qed/qed_iscsi_if.h>
0026 #include "qed.h"
0027 #include "qed_cxt.h"
0028 #include "qed_dev_api.h"
0029 #include "qed_hsi.h"
0030 #include "qed_hw.h"
0031 #include "qed_int.h"
0032 #include "qed_iro_hsi.h"
0033 #include "qed_iscsi.h"
0034 #include "qed_ll2.h"
0035 #include "qed_mcp.h"
0036 #include "qed_sp.h"
0037 #include "qed_sriov.h"
0038 #include "qed_reg_addr.h"
0039 
0040 struct qed_iscsi_conn {
0041     struct list_head list_entry;
0042     bool free_on_delete;
0043 
0044     u16 conn_id;
0045     u32 icid;
0046     u32 fw_cid;
0047 
0048     u8 layer_code;
0049     u8 offl_flags;
0050     u8 connect_mode;
0051     u32 initial_ack;
0052     dma_addr_t sq_pbl_addr;
0053     struct qed_chain r2tq;
0054     struct qed_chain xhq;
0055     struct qed_chain uhq;
0056 
0057     struct tcp_upload_params *tcp_upload_params_virt_addr;
0058     dma_addr_t tcp_upload_params_phys_addr;
0059     struct scsi_terminate_extra_params *queue_cnts_virt_addr;
0060     dma_addr_t queue_cnts_phys_addr;
0061     dma_addr_t syn_phy_addr;
0062 
0063     u16 syn_ip_payload_length;
0064     u8 local_mac[6];
0065     u8 remote_mac[6];
0066     u16 vlan_id;
0067     u16 tcp_flags;
0068     u8 ip_version;
0069     u32 remote_ip[4];
0070     u32 local_ip[4];
0071     u8 ka_max_probe_cnt;
0072     u8 dup_ack_theshold;
0073     u32 rcv_next;
0074     u32 snd_una;
0075     u32 snd_next;
0076     u32 snd_max;
0077     u32 snd_wnd;
0078     u32 rcv_wnd;
0079     u32 snd_wl1;
0080     u32 cwnd;
0081     u32 ss_thresh;
0082     u16 srtt;
0083     u16 rtt_var;
0084     u32 ts_recent;
0085     u32 ts_recent_age;
0086     u32 total_rt;
0087     u32 ka_timeout_delta;
0088     u32 rt_timeout_delta;
0089     u8 dup_ack_cnt;
0090     u8 snd_wnd_probe_cnt;
0091     u8 ka_probe_cnt;
0092     u8 rt_cnt;
0093     u32 flow_label;
0094     u32 ka_timeout;
0095     u32 ka_interval;
0096     u32 max_rt_time;
0097     u32 initial_rcv_wnd;
0098     u8 ttl;
0099     u8 tos_or_tc;
0100     u16 remote_port;
0101     u16 local_port;
0102     u16 mss;
0103     u8 snd_wnd_scale;
0104     u8 rcv_wnd_scale;
0105     u16 da_timeout_value;
0106     u8 ack_frequency;
0107 
0108     u8 update_flag;
0109     u8 default_cq;
0110     u32 max_seq_size;
0111     u32 max_recv_pdu_length;
0112     u32 max_send_pdu_length;
0113     u32 first_seq_length;
0114     u32 exp_stat_sn;
0115     u32 stat_sn;
0116     u16 physical_q0;
0117     u16 physical_q1;
0118     u8 abortive_dsconnect;
0119 };
0120 
0121 static int qed_iscsi_async_event(struct qed_hwfn *p_hwfn, u8 fw_event_code,
0122                  __le16 echo, union event_ring_data *data,
0123                  u8 fw_return_code)
0124 {
0125     if (p_hwfn->p_iscsi_info->event_cb) {
0126         struct qed_iscsi_info *p_iscsi = p_hwfn->p_iscsi_info;
0127 
0128         return p_iscsi->event_cb(p_iscsi->event_context,
0129                      fw_event_code, data);
0130     } else {
0131         DP_NOTICE(p_hwfn, "iSCSI async completion is not set\n");
0132         return -EINVAL;
0133     }
0134 }
0135 
0136 static int
0137 qed_sp_iscsi_func_start(struct qed_hwfn *p_hwfn,
0138             enum spq_mode comp_mode,
0139             struct qed_spq_comp_cb *p_comp_addr,
0140             void *event_context, iscsi_event_cb_t async_event_cb)
0141 {
0142     struct iscsi_init_ramrod_params *p_ramrod = NULL;
0143     struct scsi_init_func_queues *p_queue = NULL;
0144     struct qed_iscsi_pf_params *p_params = NULL;
0145     struct iscsi_spe_func_init *p_init = NULL;
0146     struct qed_spq_entry *p_ent = NULL;
0147     struct qed_sp_init_data init_data;
0148     int rc = 0;
0149     u32 dval;
0150     u16 val;
0151     u8 i;
0152 
0153     /* Get SPQ entry */
0154     memset(&init_data, 0, sizeof(init_data));
0155     init_data.cid = qed_spq_get_cid(p_hwfn);
0156     init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
0157     init_data.comp_mode = comp_mode;
0158     init_data.p_comp_data = p_comp_addr;
0159 
0160     rc = qed_sp_init_request(p_hwfn, &p_ent,
0161                  ISCSI_RAMROD_CMD_ID_INIT_FUNC,
0162                  PROTOCOLID_TCP_ULP, &init_data);
0163     if (rc)
0164         return rc;
0165 
0166     p_ramrod = &p_ent->ramrod.iscsi_init;
0167     p_init = &p_ramrod->iscsi_init_spe;
0168     p_params = &p_hwfn->pf_params.iscsi_pf_params;
0169     p_queue = &p_init->q_params;
0170 
0171     /* Sanity */
0172     if (p_params->num_queues > p_hwfn->hw_info.feat_num[QED_ISCSI_CQ]) {
0173         DP_ERR(p_hwfn,
0174                "Cannot satisfy CQ amount. Queues requested %d, CQs available %d. Aborting function start\n",
0175                p_params->num_queues,
0176                p_hwfn->hw_info.feat_num[QED_ISCSI_CQ]);
0177         qed_sp_destroy_request(p_hwfn, p_ent);
0178         return -EINVAL;
0179     }
0180 
0181     val = p_params->half_way_close_timeout;
0182     p_init->half_way_close_timeout = cpu_to_le16(val);
0183     p_init->num_sq_pages_in_ring = p_params->num_sq_pages_in_ring;
0184     p_init->num_r2tq_pages_in_ring = p_params->num_r2tq_pages_in_ring;
0185     p_init->num_uhq_pages_in_ring = p_params->num_uhq_pages_in_ring;
0186     p_init->ll2_rx_queue_id =
0187         p_hwfn->hw_info.resc_start[QED_LL2_RAM_QUEUE] +
0188         p_params->ll2_ooo_queue_id;
0189 
0190     p_init->func_params.log_page_size = p_params->log_page_size;
0191     val = p_params->num_tasks;
0192     p_init->func_params.num_tasks = cpu_to_le16(val);
0193     p_init->debug_mode.flags = p_params->debug_mode;
0194 
0195     DMA_REGPAIR_LE(p_queue->glbl_q_params_addr,
0196                p_params->glbl_q_params_addr);
0197 
0198     val = p_params->cq_num_entries;
0199     p_queue->cq_num_entries = cpu_to_le16(val);
0200     val = p_params->cmdq_num_entries;
0201     p_queue->cmdq_num_entries = cpu_to_le16(val);
0202     p_queue->num_queues = p_params->num_queues;
0203     dval = (u8)p_hwfn->hw_info.resc_start[QED_CMDQS_CQS];
0204     p_queue->queue_relative_offset = (u8)dval;
0205     p_queue->cq_sb_pi = p_params->gl_rq_pi;
0206     p_queue->cmdq_sb_pi = p_params->gl_cmd_pi;
0207 
0208     for (i = 0; i < p_params->num_queues; i++) {
0209         val = qed_get_igu_sb_id(p_hwfn, i);
0210         p_queue->cq_cmdq_sb_num_arr[i] = cpu_to_le16(val);
0211     }
0212 
0213     p_queue->bdq_resource_id = (u8)RESC_START(p_hwfn, QED_BDQ);
0214 
0215     DMA_REGPAIR_LE(p_queue->bdq_pbl_base_address[BDQ_ID_RQ],
0216                p_params->bdq_pbl_base_addr[BDQ_ID_RQ]);
0217     p_queue->bdq_pbl_num_entries[BDQ_ID_RQ] =
0218         p_params->bdq_pbl_num_entries[BDQ_ID_RQ];
0219     val = p_params->bdq_xoff_threshold[BDQ_ID_RQ];
0220     p_queue->bdq_xoff_threshold[BDQ_ID_RQ] = cpu_to_le16(val);
0221     val = p_params->bdq_xon_threshold[BDQ_ID_RQ];
0222     p_queue->bdq_xon_threshold[BDQ_ID_RQ] = cpu_to_le16(val);
0223 
0224     DMA_REGPAIR_LE(p_queue->bdq_pbl_base_address[BDQ_ID_IMM_DATA],
0225                p_params->bdq_pbl_base_addr[BDQ_ID_IMM_DATA]);
0226     p_queue->bdq_pbl_num_entries[BDQ_ID_IMM_DATA] =
0227         p_params->bdq_pbl_num_entries[BDQ_ID_IMM_DATA];
0228     val = p_params->bdq_xoff_threshold[BDQ_ID_IMM_DATA];
0229     p_queue->bdq_xoff_threshold[BDQ_ID_IMM_DATA] = cpu_to_le16(val);
0230     val = p_params->bdq_xon_threshold[BDQ_ID_IMM_DATA];
0231     p_queue->bdq_xon_threshold[BDQ_ID_IMM_DATA] = cpu_to_le16(val);
0232     val = p_params->rq_buffer_size;
0233     p_queue->rq_buffer_size = cpu_to_le16(val);
0234     if (p_params->is_target) {
0235         SET_FIELD(p_queue->q_validity,
0236               SCSI_INIT_FUNC_QUEUES_RQ_VALID, 1);
0237         if (p_queue->bdq_pbl_num_entries[BDQ_ID_IMM_DATA])
0238             SET_FIELD(p_queue->q_validity,
0239                   SCSI_INIT_FUNC_QUEUES_IMM_DATA_VALID, 1);
0240         SET_FIELD(p_queue->q_validity,
0241               SCSI_INIT_FUNC_QUEUES_CMD_VALID, 1);
0242     } else {
0243         SET_FIELD(p_queue->q_validity,
0244               SCSI_INIT_FUNC_QUEUES_RQ_VALID, 1);
0245     }
0246     p_ramrod->tcp_init.two_msl_timer = cpu_to_le32(p_params->two_msl_timer);
0247     val = p_params->tx_sws_timer;
0248     p_ramrod->tcp_init.tx_sws_timer = cpu_to_le16(val);
0249     p_ramrod->tcp_init.max_fin_rt = p_params->max_fin_rt;
0250 
0251     p_hwfn->p_iscsi_info->event_context = event_context;
0252     p_hwfn->p_iscsi_info->event_cb = async_event_cb;
0253 
0254     qed_spq_register_async_cb(p_hwfn, PROTOCOLID_TCP_ULP,
0255                   qed_iscsi_async_event);
0256 
0257     return qed_spq_post(p_hwfn, p_ent, NULL);
0258 }
0259 
0260 static int qed_sp_iscsi_conn_offload(struct qed_hwfn *p_hwfn,
0261                      struct qed_iscsi_conn *p_conn,
0262                      enum spq_mode comp_mode,
0263                      struct qed_spq_comp_cb *p_comp_addr)
0264 {
0265     struct iscsi_spe_conn_offload *p_ramrod = NULL;
0266     struct tcp_offload_params_opt2 *p_tcp2 = NULL;
0267     struct tcp_offload_params *p_tcp = NULL;
0268     struct qed_spq_entry *p_ent = NULL;
0269     struct qed_sp_init_data init_data;
0270     dma_addr_t r2tq_pbl_addr;
0271     dma_addr_t xhq_pbl_addr;
0272     dma_addr_t uhq_pbl_addr;
0273     u16 physical_q;
0274     __le16 tmp;
0275     int rc = 0;
0276     u32 dval;
0277     u16 wval;
0278     u16 *p;
0279     u8 i;
0280 
0281     /* Get SPQ entry */
0282     memset(&init_data, 0, sizeof(init_data));
0283     init_data.cid = p_conn->icid;
0284     init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
0285     init_data.comp_mode = comp_mode;
0286     init_data.p_comp_data = p_comp_addr;
0287 
0288     rc = qed_sp_init_request(p_hwfn, &p_ent,
0289                  ISCSI_RAMROD_CMD_ID_OFFLOAD_CONN,
0290                  PROTOCOLID_TCP_ULP, &init_data);
0291     if (rc)
0292         return rc;
0293 
0294     p_ramrod = &p_ent->ramrod.iscsi_conn_offload;
0295 
0296     /* Transmission PQ is the first of the PF */
0297     physical_q = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);
0298     p_conn->physical_q0 = physical_q;
0299     p_ramrod->iscsi.physical_q0 = cpu_to_le16(physical_q);
0300 
0301     /* iSCSI Pure-ACK PQ */
0302     physical_q = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_ACK);
0303     p_conn->physical_q1 = physical_q;
0304     p_ramrod->iscsi.physical_q1 = cpu_to_le16(physical_q);
0305 
0306     p_ramrod->conn_id = cpu_to_le16(p_conn->conn_id);
0307 
0308     DMA_REGPAIR_LE(p_ramrod->iscsi.sq_pbl_addr, p_conn->sq_pbl_addr);
0309 
0310     r2tq_pbl_addr = qed_chain_get_pbl_phys(&p_conn->r2tq);
0311     DMA_REGPAIR_LE(p_ramrod->iscsi.r2tq_pbl_addr, r2tq_pbl_addr);
0312 
0313     xhq_pbl_addr = qed_chain_get_pbl_phys(&p_conn->xhq);
0314     DMA_REGPAIR_LE(p_ramrod->iscsi.xhq_pbl_addr, xhq_pbl_addr);
0315 
0316     uhq_pbl_addr = qed_chain_get_pbl_phys(&p_conn->uhq);
0317     DMA_REGPAIR_LE(p_ramrod->iscsi.uhq_pbl_addr, uhq_pbl_addr);
0318 
0319     p_ramrod->iscsi.initial_ack = cpu_to_le32(p_conn->initial_ack);
0320     p_ramrod->iscsi.flags = p_conn->offl_flags;
0321     p_ramrod->iscsi.default_cq = p_conn->default_cq;
0322     p_ramrod->iscsi.stat_sn = cpu_to_le32(p_conn->stat_sn);
0323 
0324     if (!GET_FIELD(p_ramrod->iscsi.flags,
0325                ISCSI_CONN_OFFLOAD_PARAMS_TCP_ON_CHIP_1B)) {
0326         p_tcp = &p_ramrod->tcp;
0327 
0328         p = (u16 *)p_conn->local_mac;
0329         tmp = cpu_to_le16(get_unaligned_be16(p));
0330         p_tcp->local_mac_addr_hi = tmp;
0331         tmp = cpu_to_le16(get_unaligned_be16(p + 1));
0332         p_tcp->local_mac_addr_mid = tmp;
0333         tmp = cpu_to_le16(get_unaligned_be16(p + 2));
0334         p_tcp->local_mac_addr_lo = tmp;
0335 
0336         p = (u16 *)p_conn->remote_mac;
0337         tmp = cpu_to_le16(get_unaligned_be16(p));
0338         p_tcp->remote_mac_addr_hi = tmp;
0339         tmp = cpu_to_le16(get_unaligned_be16(p + 1));
0340         p_tcp->remote_mac_addr_mid = tmp;
0341         tmp = cpu_to_le16(get_unaligned_be16(p + 2));
0342         p_tcp->remote_mac_addr_lo = tmp;
0343 
0344         p_tcp->vlan_id = cpu_to_le16(p_conn->vlan_id);
0345 
0346         p_tcp->flags = cpu_to_le16(p_conn->tcp_flags);
0347         p_tcp->ip_version = p_conn->ip_version;
0348         for (i = 0; i < 4; i++) {
0349             dval = p_conn->remote_ip[i];
0350             p_tcp->remote_ip[i] = cpu_to_le32(dval);
0351             dval = p_conn->local_ip[i];
0352             p_tcp->local_ip[i] = cpu_to_le32(dval);
0353         }
0354         p_tcp->ka_max_probe_cnt = p_conn->ka_max_probe_cnt;
0355         p_tcp->dup_ack_theshold = p_conn->dup_ack_theshold;
0356 
0357         p_tcp->rcv_next = cpu_to_le32(p_conn->rcv_next);
0358         p_tcp->snd_una = cpu_to_le32(p_conn->snd_una);
0359         p_tcp->snd_next = cpu_to_le32(p_conn->snd_next);
0360         p_tcp->snd_max = cpu_to_le32(p_conn->snd_max);
0361         p_tcp->snd_wnd = cpu_to_le32(p_conn->snd_wnd);
0362         p_tcp->rcv_wnd = cpu_to_le32(p_conn->rcv_wnd);
0363         p_tcp->snd_wl1 = cpu_to_le32(p_conn->snd_wl1);
0364         p_tcp->cwnd = cpu_to_le32(p_conn->cwnd);
0365         p_tcp->ss_thresh = cpu_to_le32(p_conn->ss_thresh);
0366         p_tcp->srtt = cpu_to_le16(p_conn->srtt);
0367         p_tcp->rtt_var = cpu_to_le16(p_conn->rtt_var);
0368         p_tcp->ts_recent = cpu_to_le32(p_conn->ts_recent);
0369         p_tcp->ts_recent_age = cpu_to_le32(p_conn->ts_recent_age);
0370         p_tcp->total_rt = cpu_to_le32(p_conn->total_rt);
0371         dval = p_conn->ka_timeout_delta;
0372         p_tcp->ka_timeout_delta = cpu_to_le32(dval);
0373         dval = p_conn->rt_timeout_delta;
0374         p_tcp->rt_timeout_delta = cpu_to_le32(dval);
0375         p_tcp->dup_ack_cnt = p_conn->dup_ack_cnt;
0376         p_tcp->snd_wnd_probe_cnt = p_conn->snd_wnd_probe_cnt;
0377         p_tcp->ka_probe_cnt = p_conn->ka_probe_cnt;
0378         p_tcp->rt_cnt = p_conn->rt_cnt;
0379         p_tcp->flow_label = cpu_to_le32(p_conn->flow_label);
0380         p_tcp->ka_timeout = cpu_to_le32(p_conn->ka_timeout);
0381         p_tcp->ka_interval = cpu_to_le32(p_conn->ka_interval);
0382         p_tcp->max_rt_time = cpu_to_le32(p_conn->max_rt_time);
0383         dval = p_conn->initial_rcv_wnd;
0384         p_tcp->initial_rcv_wnd = cpu_to_le32(dval);
0385         p_tcp->ttl = p_conn->ttl;
0386         p_tcp->tos_or_tc = p_conn->tos_or_tc;
0387         p_tcp->remote_port = cpu_to_le16(p_conn->remote_port);
0388         p_tcp->local_port = cpu_to_le16(p_conn->local_port);
0389         p_tcp->mss = cpu_to_le16(p_conn->mss);
0390         p_tcp->snd_wnd_scale = p_conn->snd_wnd_scale;
0391         p_tcp->rcv_wnd_scale = p_conn->rcv_wnd_scale;
0392         wval = p_conn->da_timeout_value;
0393         p_tcp->da_timeout_value = cpu_to_le16(wval);
0394         p_tcp->ack_frequency = p_conn->ack_frequency;
0395         p_tcp->connect_mode = p_conn->connect_mode;
0396     } else {
0397         p_tcp2 =
0398             &((struct iscsi_spe_conn_offload_option2 *)p_ramrod)->tcp;
0399 
0400         p = (u16 *)p_conn->local_mac;
0401         tmp = cpu_to_le16(get_unaligned_be16(p));
0402         p_tcp2->local_mac_addr_hi = tmp;
0403         tmp = cpu_to_le16(get_unaligned_be16(p + 1));
0404         p_tcp2->local_mac_addr_mid = tmp;
0405         tmp = cpu_to_le16(get_unaligned_be16(p + 2));
0406         p_tcp2->local_mac_addr_lo = tmp;
0407 
0408         p = (u16 *)p_conn->remote_mac;
0409         tmp = cpu_to_le16(get_unaligned_be16(p));
0410         p_tcp2->remote_mac_addr_hi = tmp;
0411         tmp = cpu_to_le16(get_unaligned_be16(p + 1));
0412         p_tcp2->remote_mac_addr_mid = tmp;
0413         tmp = cpu_to_le16(get_unaligned_be16(p + 2));
0414         p_tcp2->remote_mac_addr_lo = tmp;
0415 
0416         p_tcp2->vlan_id = cpu_to_le16(p_conn->vlan_id);
0417         p_tcp2->flags = cpu_to_le16(p_conn->tcp_flags);
0418 
0419         p_tcp2->ip_version = p_conn->ip_version;
0420         for (i = 0; i < 4; i++) {
0421             dval = p_conn->remote_ip[i];
0422             p_tcp2->remote_ip[i] = cpu_to_le32(dval);
0423             dval = p_conn->local_ip[i];
0424             p_tcp2->local_ip[i] = cpu_to_le32(dval);
0425         }
0426 
0427         p_tcp2->flow_label = cpu_to_le32(p_conn->flow_label);
0428         p_tcp2->ttl = p_conn->ttl;
0429         p_tcp2->tos_or_tc = p_conn->tos_or_tc;
0430         p_tcp2->remote_port = cpu_to_le16(p_conn->remote_port);
0431         p_tcp2->local_port = cpu_to_le16(p_conn->local_port);
0432         p_tcp2->mss = cpu_to_le16(p_conn->mss);
0433         p_tcp2->rcv_wnd_scale = p_conn->rcv_wnd_scale;
0434         p_tcp2->connect_mode = p_conn->connect_mode;
0435         wval = p_conn->syn_ip_payload_length;
0436         p_tcp2->syn_ip_payload_length = cpu_to_le16(wval);
0437         p_tcp2->syn_phy_addr_lo = DMA_LO_LE(p_conn->syn_phy_addr);
0438         p_tcp2->syn_phy_addr_hi = DMA_HI_LE(p_conn->syn_phy_addr);
0439         p_tcp2->cwnd = cpu_to_le32(p_conn->cwnd);
0440         p_tcp2->ka_max_probe_cnt = p_conn->ka_probe_cnt;
0441         p_tcp2->ka_timeout = cpu_to_le32(p_conn->ka_timeout);
0442         p_tcp2->max_rt_time = cpu_to_le32(p_conn->max_rt_time);
0443         p_tcp2->ka_interval = cpu_to_le32(p_conn->ka_interval);
0444     }
0445 
0446     return qed_spq_post(p_hwfn, p_ent, NULL);
0447 }
0448 
0449 static int qed_sp_iscsi_conn_update(struct qed_hwfn *p_hwfn,
0450                     struct qed_iscsi_conn *p_conn,
0451                     enum spq_mode comp_mode,
0452                     struct qed_spq_comp_cb *p_comp_addr)
0453 {
0454     struct iscsi_conn_update_ramrod_params *p_ramrod = NULL;
0455     struct qed_spq_entry *p_ent = NULL;
0456     struct qed_sp_init_data init_data;
0457     int rc;
0458     u32 dval;
0459 
0460     /* Get SPQ entry */
0461     memset(&init_data, 0, sizeof(init_data));
0462     init_data.cid = p_conn->icid;
0463     init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
0464     init_data.comp_mode = comp_mode;
0465     init_data.p_comp_data = p_comp_addr;
0466 
0467     rc = qed_sp_init_request(p_hwfn, &p_ent,
0468                  ISCSI_RAMROD_CMD_ID_UPDATE_CONN,
0469                  PROTOCOLID_TCP_ULP, &init_data);
0470     if (rc)
0471         return rc;
0472 
0473     p_ramrod = &p_ent->ramrod.iscsi_conn_update;
0474 
0475     p_ramrod->conn_id = cpu_to_le16(p_conn->conn_id);
0476     p_ramrod->flags = p_conn->update_flag;
0477     p_ramrod->max_seq_size = cpu_to_le32(p_conn->max_seq_size);
0478     dval = p_conn->max_recv_pdu_length;
0479     p_ramrod->max_recv_pdu_length = cpu_to_le32(dval);
0480     dval = p_conn->max_send_pdu_length;
0481     p_ramrod->max_send_pdu_length = cpu_to_le32(dval);
0482     dval = p_conn->first_seq_length;
0483     p_ramrod->first_seq_length = cpu_to_le32(dval);
0484     p_ramrod->exp_stat_sn = cpu_to_le32(p_conn->exp_stat_sn);
0485 
0486     return qed_spq_post(p_hwfn, p_ent, NULL);
0487 }
0488 
0489 static int
0490 qed_sp_iscsi_mac_update(struct qed_hwfn *p_hwfn,
0491             struct qed_iscsi_conn *p_conn,
0492             enum spq_mode comp_mode,
0493             struct qed_spq_comp_cb *p_comp_addr)
0494 {
0495     struct iscsi_spe_conn_mac_update *p_ramrod = NULL;
0496     struct qed_spq_entry *p_ent = NULL;
0497     struct qed_sp_init_data init_data;
0498     int rc = -EINVAL;
0499     u8 ucval;
0500 
0501     /* Get SPQ entry */
0502     memset(&init_data, 0, sizeof(init_data));
0503     init_data.cid = p_conn->icid;
0504     init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
0505     init_data.comp_mode = comp_mode;
0506     init_data.p_comp_data = p_comp_addr;
0507 
0508     rc = qed_sp_init_request(p_hwfn, &p_ent,
0509                  ISCSI_RAMROD_CMD_ID_MAC_UPDATE,
0510                  PROTOCOLID_TCP_ULP, &init_data);
0511     if (rc)
0512         return rc;
0513 
0514     p_ramrod = &p_ent->ramrod.iscsi_conn_mac_update;
0515 
0516     p_ramrod->conn_id = cpu_to_le16(p_conn->conn_id);
0517     ucval = p_conn->remote_mac[1];
0518     ((u8 *)(&p_ramrod->remote_mac_addr_hi))[0] = ucval;
0519     ucval = p_conn->remote_mac[0];
0520     ((u8 *)(&p_ramrod->remote_mac_addr_hi))[1] = ucval;
0521     ucval = p_conn->remote_mac[3];
0522     ((u8 *)(&p_ramrod->remote_mac_addr_mid))[0] = ucval;
0523     ucval = p_conn->remote_mac[2];
0524     ((u8 *)(&p_ramrod->remote_mac_addr_mid))[1] = ucval;
0525     ucval = p_conn->remote_mac[5];
0526     ((u8 *)(&p_ramrod->remote_mac_addr_lo))[0] = ucval;
0527     ucval = p_conn->remote_mac[4];
0528     ((u8 *)(&p_ramrod->remote_mac_addr_lo))[1] = ucval;
0529 
0530     return qed_spq_post(p_hwfn, p_ent, NULL);
0531 }
0532 
0533 static int qed_sp_iscsi_conn_terminate(struct qed_hwfn *p_hwfn,
0534                        struct qed_iscsi_conn *p_conn,
0535                        enum spq_mode comp_mode,
0536                        struct qed_spq_comp_cb *p_comp_addr)
0537 {
0538     struct iscsi_spe_conn_termination *p_ramrod = NULL;
0539     struct qed_spq_entry *p_ent = NULL;
0540     struct qed_sp_init_data init_data;
0541     int rc = -EINVAL;
0542 
0543     /* Get SPQ entry */
0544     memset(&init_data, 0, sizeof(init_data));
0545     init_data.cid = p_conn->icid;
0546     init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
0547     init_data.comp_mode = comp_mode;
0548     init_data.p_comp_data = p_comp_addr;
0549 
0550     rc = qed_sp_init_request(p_hwfn, &p_ent,
0551                  ISCSI_RAMROD_CMD_ID_TERMINATION_CONN,
0552                  PROTOCOLID_TCP_ULP, &init_data);
0553     if (rc)
0554         return rc;
0555 
0556     p_ramrod = &p_ent->ramrod.iscsi_conn_terminate;
0557 
0558     p_ramrod->conn_id = cpu_to_le16(p_conn->conn_id);
0559     p_ramrod->abortive = p_conn->abortive_dsconnect;
0560 
0561     DMA_REGPAIR_LE(p_ramrod->query_params_addr,
0562                p_conn->tcp_upload_params_phys_addr);
0563     DMA_REGPAIR_LE(p_ramrod->queue_cnts_addr, p_conn->queue_cnts_phys_addr);
0564 
0565     return qed_spq_post(p_hwfn, p_ent, NULL);
0566 }
0567 
0568 static int qed_sp_iscsi_conn_clear_sq(struct qed_hwfn *p_hwfn,
0569                       struct qed_iscsi_conn *p_conn,
0570                       enum spq_mode comp_mode,
0571                       struct qed_spq_comp_cb *p_comp_addr)
0572 {
0573     struct qed_spq_entry *p_ent = NULL;
0574     struct qed_sp_init_data init_data;
0575     int rc = -EINVAL;
0576 
0577     /* Get SPQ entry */
0578     memset(&init_data, 0, sizeof(init_data));
0579     init_data.cid = p_conn->icid;
0580     init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
0581     init_data.comp_mode = comp_mode;
0582     init_data.p_comp_data = p_comp_addr;
0583 
0584     rc = qed_sp_init_request(p_hwfn, &p_ent,
0585                  ISCSI_RAMROD_CMD_ID_CLEAR_SQ,
0586                  PROTOCOLID_TCP_ULP, &init_data);
0587     if (rc)
0588         return rc;
0589 
0590     return qed_spq_post(p_hwfn, p_ent, NULL);
0591 }
0592 
0593 static int qed_sp_iscsi_func_stop(struct qed_hwfn *p_hwfn,
0594                   enum spq_mode comp_mode,
0595                   struct qed_spq_comp_cb *p_comp_addr)
0596 {
0597     struct qed_spq_entry *p_ent = NULL;
0598     struct qed_sp_init_data init_data;
0599     int rc = 0;
0600 
0601     /* Get SPQ entry */
0602     memset(&init_data, 0, sizeof(init_data));
0603     init_data.cid = qed_spq_get_cid(p_hwfn);
0604     init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
0605     init_data.comp_mode = comp_mode;
0606     init_data.p_comp_data = p_comp_addr;
0607 
0608     rc = qed_sp_init_request(p_hwfn, &p_ent,
0609                  ISCSI_RAMROD_CMD_ID_DESTROY_FUNC,
0610                  PROTOCOLID_TCP_ULP, &init_data);
0611     if (rc)
0612         return rc;
0613 
0614     rc = qed_spq_post(p_hwfn, p_ent, NULL);
0615 
0616     qed_spq_unregister_async_cb(p_hwfn, PROTOCOLID_TCP_ULP);
0617     return rc;
0618 }
0619 
0620 static void __iomem *qed_iscsi_get_db_addr(struct qed_hwfn *p_hwfn, u32 cid)
0621 {
0622     return (u8 __iomem *)p_hwfn->doorbells +
0623                  qed_db_addr(cid, DQ_DEMS_LEGACY);
0624 }
0625 
0626 static void __iomem *qed_iscsi_get_primary_bdq_prod(struct qed_hwfn *p_hwfn,
0627                             u8 bdq_id)
0628 {
0629     if (RESC_NUM(p_hwfn, QED_BDQ)) {
0630         return (u8 __iomem *)p_hwfn->regview +
0631             GET_GTT_BDQ_REG_ADDR(GTT_BAR0_MAP_REG_MSDM_RAM,
0632                      MSTORM_SCSI_BDQ_EXT_PROD,
0633                      RESC_START(p_hwfn, QED_BDQ), bdq_id);
0634     } else {
0635         DP_NOTICE(p_hwfn, "BDQ is not allocated!\n");
0636         return NULL;
0637     }
0638 }
0639 
0640 static void __iomem *qed_iscsi_get_secondary_bdq_prod(struct qed_hwfn *p_hwfn,
0641                               u8 bdq_id)
0642 {
0643     if (RESC_NUM(p_hwfn, QED_BDQ)) {
0644         return (u8 __iomem *)p_hwfn->regview +
0645             GET_GTT_BDQ_REG_ADDR(GTT_BAR0_MAP_REG_TSDM_RAM,
0646                      TSTORM_SCSI_BDQ_EXT_PROD,
0647                      RESC_START(p_hwfn, QED_BDQ), bdq_id);
0648     } else {
0649         DP_NOTICE(p_hwfn, "BDQ is not allocated!\n");
0650         return NULL;
0651     }
0652 }
0653 
0654 static int qed_iscsi_setup_connection(struct qed_iscsi_conn *p_conn)
0655 {
0656     if (!p_conn->queue_cnts_virt_addr)
0657         goto nomem;
0658     memset(p_conn->queue_cnts_virt_addr, 0,
0659            sizeof(*p_conn->queue_cnts_virt_addr));
0660 
0661     if (!p_conn->tcp_upload_params_virt_addr)
0662         goto nomem;
0663     memset(p_conn->tcp_upload_params_virt_addr, 0,
0664            sizeof(*p_conn->tcp_upload_params_virt_addr));
0665 
0666     if (!p_conn->r2tq.p_virt_addr)
0667         goto nomem;
0668     qed_chain_pbl_zero_mem(&p_conn->r2tq);
0669 
0670     if (!p_conn->uhq.p_virt_addr)
0671         goto nomem;
0672     qed_chain_pbl_zero_mem(&p_conn->uhq);
0673 
0674     if (!p_conn->xhq.p_virt_addr)
0675         goto nomem;
0676     qed_chain_pbl_zero_mem(&p_conn->xhq);
0677 
0678     return 0;
0679 nomem:
0680     return -ENOMEM;
0681 }
0682 
0683 static int qed_iscsi_allocate_connection(struct qed_hwfn *p_hwfn,
0684                      struct qed_iscsi_conn **p_out_conn)
0685 {
0686     struct scsi_terminate_extra_params *p_q_cnts = NULL;
0687     struct qed_iscsi_pf_params *p_params = NULL;
0688     struct qed_chain_init_params params = {
0689         .mode       = QED_CHAIN_MODE_PBL,
0690         .intended_use   = QED_CHAIN_USE_TO_CONSUME_PRODUCE,
0691         .cnt_type   = QED_CHAIN_CNT_TYPE_U16,
0692     };
0693     struct tcp_upload_params *p_tcp = NULL;
0694     struct qed_iscsi_conn *p_conn = NULL;
0695     int rc = 0;
0696 
0697     /* Try finding a free connection that can be used */
0698     spin_lock_bh(&p_hwfn->p_iscsi_info->lock);
0699     if (!list_empty(&p_hwfn->p_iscsi_info->free_list))
0700         p_conn = list_first_entry(&p_hwfn->p_iscsi_info->free_list,
0701                       struct qed_iscsi_conn, list_entry);
0702     if (p_conn) {
0703         list_del(&p_conn->list_entry);
0704         spin_unlock_bh(&p_hwfn->p_iscsi_info->lock);
0705         *p_out_conn = p_conn;
0706         return 0;
0707     }
0708     spin_unlock_bh(&p_hwfn->p_iscsi_info->lock);
0709 
0710     /* Need to allocate a new connection */
0711     p_params = &p_hwfn->pf_params.iscsi_pf_params;
0712 
0713     p_conn = kzalloc(sizeof(*p_conn), GFP_KERNEL);
0714     if (!p_conn)
0715         return -ENOMEM;
0716 
0717     p_q_cnts = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
0718                       sizeof(*p_q_cnts),
0719                       &p_conn->queue_cnts_phys_addr,
0720                       GFP_KERNEL);
0721     if (!p_q_cnts)
0722         goto nomem_queue_cnts_param;
0723     p_conn->queue_cnts_virt_addr = p_q_cnts;
0724 
0725     p_tcp = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
0726                    sizeof(*p_tcp),
0727                    &p_conn->tcp_upload_params_phys_addr,
0728                    GFP_KERNEL);
0729     if (!p_tcp)
0730         goto nomem_upload_param;
0731     p_conn->tcp_upload_params_virt_addr = p_tcp;
0732 
0733     params.num_elems = p_params->num_r2tq_pages_in_ring *
0734                QED_CHAIN_PAGE_SIZE / sizeof(struct iscsi_wqe);
0735     params.elem_size = sizeof(struct iscsi_wqe);
0736 
0737     rc = qed_chain_alloc(p_hwfn->cdev, &p_conn->r2tq, &params);
0738     if (rc)
0739         goto nomem_r2tq;
0740 
0741     params.num_elems = p_params->num_uhq_pages_in_ring *
0742                QED_CHAIN_PAGE_SIZE / sizeof(struct iscsi_uhqe);
0743     params.elem_size = sizeof(struct iscsi_uhqe);
0744 
0745     rc = qed_chain_alloc(p_hwfn->cdev, &p_conn->uhq, &params);
0746     if (rc)
0747         goto nomem_uhq;
0748 
0749     params.elem_size = sizeof(struct iscsi_xhqe);
0750 
0751     rc = qed_chain_alloc(p_hwfn->cdev, &p_conn->xhq, &params);
0752     if (rc)
0753         goto nomem;
0754 
0755     p_conn->free_on_delete = true;
0756     *p_out_conn = p_conn;
0757     return 0;
0758 
0759 nomem:
0760     qed_chain_free(p_hwfn->cdev, &p_conn->uhq);
0761 nomem_uhq:
0762     qed_chain_free(p_hwfn->cdev, &p_conn->r2tq);
0763 nomem_r2tq:
0764     dma_free_coherent(&p_hwfn->cdev->pdev->dev,
0765               sizeof(struct tcp_upload_params),
0766               p_conn->tcp_upload_params_virt_addr,
0767               p_conn->tcp_upload_params_phys_addr);
0768 nomem_upload_param:
0769     dma_free_coherent(&p_hwfn->cdev->pdev->dev,
0770               sizeof(struct scsi_terminate_extra_params),
0771               p_conn->queue_cnts_virt_addr,
0772               p_conn->queue_cnts_phys_addr);
0773 nomem_queue_cnts_param:
0774     kfree(p_conn);
0775 
0776     return -ENOMEM;
0777 }
0778 
0779 static int qed_iscsi_acquire_connection(struct qed_hwfn *p_hwfn,
0780                     struct qed_iscsi_conn *p_in_conn,
0781                     struct qed_iscsi_conn **p_out_conn)
0782 {
0783     struct qed_iscsi_conn *p_conn = NULL;
0784     int rc = 0;
0785     u32 icid;
0786 
0787     spin_lock_bh(&p_hwfn->p_iscsi_info->lock);
0788     rc = qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_TCP_ULP, &icid);
0789     spin_unlock_bh(&p_hwfn->p_iscsi_info->lock);
0790     if (rc)
0791         return rc;
0792 
0793     /* Use input connection or allocate a new one */
0794     if (p_in_conn)
0795         p_conn = p_in_conn;
0796     else
0797         rc = qed_iscsi_allocate_connection(p_hwfn, &p_conn);
0798 
0799     if (!rc)
0800         rc = qed_iscsi_setup_connection(p_conn);
0801 
0802     if (rc) {
0803         spin_lock_bh(&p_hwfn->p_iscsi_info->lock);
0804         qed_cxt_release_cid(p_hwfn, icid);
0805         spin_unlock_bh(&p_hwfn->p_iscsi_info->lock);
0806         return rc;
0807     }
0808 
0809     p_conn->icid = icid;
0810     p_conn->conn_id = (u16)icid;
0811     p_conn->fw_cid = (p_hwfn->hw_info.opaque_fid << 16) | icid;
0812 
0813     *p_out_conn = p_conn;
0814 
0815     return rc;
0816 }
0817 
0818 static void qed_iscsi_release_connection(struct qed_hwfn *p_hwfn,
0819                      struct qed_iscsi_conn *p_conn)
0820 {
0821     spin_lock_bh(&p_hwfn->p_iscsi_info->lock);
0822     list_add_tail(&p_conn->list_entry, &p_hwfn->p_iscsi_info->free_list);
0823     qed_cxt_release_cid(p_hwfn, p_conn->icid);
0824     spin_unlock_bh(&p_hwfn->p_iscsi_info->lock);
0825 }
0826 
0827 static void qed_iscsi_free_connection(struct qed_hwfn *p_hwfn,
0828                       struct qed_iscsi_conn *p_conn)
0829 {
0830     qed_chain_free(p_hwfn->cdev, &p_conn->xhq);
0831     qed_chain_free(p_hwfn->cdev, &p_conn->uhq);
0832     qed_chain_free(p_hwfn->cdev, &p_conn->r2tq);
0833     dma_free_coherent(&p_hwfn->cdev->pdev->dev,
0834               sizeof(struct tcp_upload_params),
0835               p_conn->tcp_upload_params_virt_addr,
0836               p_conn->tcp_upload_params_phys_addr);
0837     dma_free_coherent(&p_hwfn->cdev->pdev->dev,
0838               sizeof(struct scsi_terminate_extra_params),
0839               p_conn->queue_cnts_virt_addr,
0840               p_conn->queue_cnts_phys_addr);
0841     kfree(p_conn);
0842 }
0843 
0844 int qed_iscsi_alloc(struct qed_hwfn *p_hwfn)
0845 {
0846     struct qed_iscsi_info *p_iscsi_info;
0847 
0848     p_iscsi_info = kzalloc(sizeof(*p_iscsi_info), GFP_KERNEL);
0849     if (!p_iscsi_info)
0850         return -ENOMEM;
0851 
0852     INIT_LIST_HEAD(&p_iscsi_info->free_list);
0853 
0854     p_hwfn->p_iscsi_info = p_iscsi_info;
0855     return 0;
0856 }
0857 
0858 void qed_iscsi_setup(struct qed_hwfn *p_hwfn)
0859 {
0860     spin_lock_init(&p_hwfn->p_iscsi_info->lock);
0861 }
0862 
0863 void qed_iscsi_free(struct qed_hwfn *p_hwfn)
0864 {
0865     struct qed_iscsi_conn *p_conn = NULL;
0866 
0867     if (!p_hwfn->p_iscsi_info)
0868         return;
0869 
0870     while (!list_empty(&p_hwfn->p_iscsi_info->free_list)) {
0871         p_conn = list_first_entry(&p_hwfn->p_iscsi_info->free_list,
0872                       struct qed_iscsi_conn, list_entry);
0873         if (p_conn) {
0874             list_del(&p_conn->list_entry);
0875             qed_iscsi_free_connection(p_hwfn, p_conn);
0876         }
0877     }
0878 
0879     kfree(p_hwfn->p_iscsi_info);
0880     p_hwfn->p_iscsi_info = NULL;
0881 }
0882 
0883 static void _qed_iscsi_get_tstats(struct qed_hwfn *p_hwfn,
0884                   struct qed_ptt *p_ptt,
0885                   struct qed_iscsi_stats *p_stats)
0886 {
0887     struct tstorm_iscsi_stats_drv tstats;
0888     u32 tstats_addr;
0889 
0890     memset(&tstats, 0, sizeof(tstats));
0891     tstats_addr = BAR0_MAP_REG_TSDM_RAM +
0892               TSTORM_ISCSI_RX_STATS_OFFSET(p_hwfn->rel_pf_id);
0893     qed_memcpy_from(p_hwfn, p_ptt, &tstats, tstats_addr, sizeof(tstats));
0894 
0895     p_stats->iscsi_rx_bytes_cnt =
0896         HILO_64_REGPAIR(tstats.iscsi_rx_bytes_cnt);
0897     p_stats->iscsi_rx_packet_cnt =
0898         HILO_64_REGPAIR(tstats.iscsi_rx_packet_cnt);
0899     p_stats->iscsi_rx_new_ooo_isle_events_cnt =
0900         HILO_64_REGPAIR(tstats.iscsi_rx_new_ooo_isle_events_cnt);
0901     p_stats->iscsi_cmdq_threshold_cnt =
0902         le32_to_cpu(tstats.iscsi_cmdq_threshold_cnt);
0903     p_stats->iscsi_rq_threshold_cnt =
0904         le32_to_cpu(tstats.iscsi_rq_threshold_cnt);
0905     p_stats->iscsi_immq_threshold_cnt =
0906         le32_to_cpu(tstats.iscsi_immq_threshold_cnt);
0907 }
0908 
0909 static void _qed_iscsi_get_mstats(struct qed_hwfn *p_hwfn,
0910                   struct qed_ptt *p_ptt,
0911                   struct qed_iscsi_stats *p_stats)
0912 {
0913     struct mstorm_iscsi_stats_drv mstats;
0914     u32 mstats_addr;
0915 
0916     memset(&mstats, 0, sizeof(mstats));
0917     mstats_addr = BAR0_MAP_REG_MSDM_RAM +
0918               MSTORM_ISCSI_RX_STATS_OFFSET(p_hwfn->rel_pf_id);
0919     qed_memcpy_from(p_hwfn, p_ptt, &mstats, mstats_addr, sizeof(mstats));
0920 
0921     p_stats->iscsi_rx_dropped_pdus_task_not_valid =
0922         HILO_64_REGPAIR(mstats.iscsi_rx_dropped_pdus_task_not_valid);
0923 }
0924 
0925 static void _qed_iscsi_get_ustats(struct qed_hwfn *p_hwfn,
0926                   struct qed_ptt *p_ptt,
0927                   struct qed_iscsi_stats *p_stats)
0928 {
0929     struct ustorm_iscsi_stats_drv ustats;
0930     u32 ustats_addr;
0931 
0932     memset(&ustats, 0, sizeof(ustats));
0933     ustats_addr = BAR0_MAP_REG_USDM_RAM +
0934               USTORM_ISCSI_RX_STATS_OFFSET(p_hwfn->rel_pf_id);
0935     qed_memcpy_from(p_hwfn, p_ptt, &ustats, ustats_addr, sizeof(ustats));
0936 
0937     p_stats->iscsi_rx_data_pdu_cnt =
0938         HILO_64_REGPAIR(ustats.iscsi_rx_data_pdu_cnt);
0939     p_stats->iscsi_rx_r2t_pdu_cnt =
0940         HILO_64_REGPAIR(ustats.iscsi_rx_r2t_pdu_cnt);
0941     p_stats->iscsi_rx_total_pdu_cnt =
0942         HILO_64_REGPAIR(ustats.iscsi_rx_total_pdu_cnt);
0943 }
0944 
0945 static void _qed_iscsi_get_xstats(struct qed_hwfn *p_hwfn,
0946                   struct qed_ptt *p_ptt,
0947                   struct qed_iscsi_stats *p_stats)
0948 {
0949     struct xstorm_iscsi_stats_drv xstats;
0950     u32 xstats_addr;
0951 
0952     memset(&xstats, 0, sizeof(xstats));
0953     xstats_addr = BAR0_MAP_REG_XSDM_RAM +
0954               XSTORM_ISCSI_TX_STATS_OFFSET(p_hwfn->rel_pf_id);
0955     qed_memcpy_from(p_hwfn, p_ptt, &xstats, xstats_addr, sizeof(xstats));
0956 
0957     p_stats->iscsi_tx_go_to_slow_start_event_cnt =
0958         HILO_64_REGPAIR(xstats.iscsi_tx_go_to_slow_start_event_cnt);
0959     p_stats->iscsi_tx_fast_retransmit_event_cnt =
0960         HILO_64_REGPAIR(xstats.iscsi_tx_fast_retransmit_event_cnt);
0961 }
0962 
0963 static void _qed_iscsi_get_ystats(struct qed_hwfn *p_hwfn,
0964                   struct qed_ptt *p_ptt,
0965                   struct qed_iscsi_stats *p_stats)
0966 {
0967     struct ystorm_iscsi_stats_drv ystats;
0968     u32 ystats_addr;
0969 
0970     memset(&ystats, 0, sizeof(ystats));
0971     ystats_addr = BAR0_MAP_REG_YSDM_RAM +
0972               YSTORM_ISCSI_TX_STATS_OFFSET(p_hwfn->rel_pf_id);
0973     qed_memcpy_from(p_hwfn, p_ptt, &ystats, ystats_addr, sizeof(ystats));
0974 
0975     p_stats->iscsi_tx_data_pdu_cnt =
0976         HILO_64_REGPAIR(ystats.iscsi_tx_data_pdu_cnt);
0977     p_stats->iscsi_tx_r2t_pdu_cnt =
0978         HILO_64_REGPAIR(ystats.iscsi_tx_r2t_pdu_cnt);
0979     p_stats->iscsi_tx_total_pdu_cnt =
0980         HILO_64_REGPAIR(ystats.iscsi_tx_total_pdu_cnt);
0981 }
0982 
0983 static void _qed_iscsi_get_pstats(struct qed_hwfn *p_hwfn,
0984                   struct qed_ptt *p_ptt,
0985                   struct qed_iscsi_stats *p_stats)
0986 {
0987     struct pstorm_iscsi_stats_drv pstats;
0988     u32 pstats_addr;
0989 
0990     memset(&pstats, 0, sizeof(pstats));
0991     pstats_addr = BAR0_MAP_REG_PSDM_RAM +
0992               PSTORM_ISCSI_TX_STATS_OFFSET(p_hwfn->rel_pf_id);
0993     qed_memcpy_from(p_hwfn, p_ptt, &pstats, pstats_addr, sizeof(pstats));
0994 
0995     p_stats->iscsi_tx_bytes_cnt =
0996         HILO_64_REGPAIR(pstats.iscsi_tx_bytes_cnt);
0997     p_stats->iscsi_tx_packet_cnt =
0998         HILO_64_REGPAIR(pstats.iscsi_tx_packet_cnt);
0999 }
1000 
1001 static int qed_iscsi_get_stats(struct qed_hwfn *p_hwfn,
1002                    struct qed_iscsi_stats *stats)
1003 {
1004     struct qed_ptt *p_ptt;
1005 
1006     memset(stats, 0, sizeof(*stats));
1007 
1008     p_ptt = qed_ptt_acquire(p_hwfn);
1009     if (!p_ptt) {
1010         DP_ERR(p_hwfn, "Failed to acquire ptt\n");
1011         return -EAGAIN;
1012     }
1013 
1014     _qed_iscsi_get_tstats(p_hwfn, p_ptt, stats);
1015     _qed_iscsi_get_mstats(p_hwfn, p_ptt, stats);
1016     _qed_iscsi_get_ustats(p_hwfn, p_ptt, stats);
1017 
1018     _qed_iscsi_get_xstats(p_hwfn, p_ptt, stats);
1019     _qed_iscsi_get_ystats(p_hwfn, p_ptt, stats);
1020     _qed_iscsi_get_pstats(p_hwfn, p_ptt, stats);
1021 
1022     qed_ptt_release(p_hwfn, p_ptt);
1023 
1024     return 0;
1025 }
1026 
1027 struct qed_hash_iscsi_con {
1028     struct hlist_node node;
1029     struct qed_iscsi_conn *con;
1030 };
1031 
1032 static int qed_fill_iscsi_dev_info(struct qed_dev *cdev,
1033                    struct qed_dev_iscsi_info *info)
1034 {
1035     struct qed_hwfn *hwfn = QED_AFFIN_HWFN(cdev);
1036 
1037     int rc;
1038 
1039     memset(info, 0, sizeof(*info));
1040     rc = qed_fill_dev_info(cdev, &info->common);
1041 
1042     info->primary_dbq_rq_addr =
1043         qed_iscsi_get_primary_bdq_prod(hwfn, BDQ_ID_RQ);
1044     info->secondary_bdq_rq_addr =
1045         qed_iscsi_get_secondary_bdq_prod(hwfn, BDQ_ID_RQ);
1046 
1047     info->num_cqs = FEAT_NUM(hwfn, QED_ISCSI_CQ);
1048 
1049     return rc;
1050 }
1051 
1052 static void qed_register_iscsi_ops(struct qed_dev *cdev,
1053                    struct qed_iscsi_cb_ops *ops, void *cookie)
1054 {
1055     cdev->protocol_ops.iscsi = ops;
1056     cdev->ops_cookie = cookie;
1057 }
1058 
1059 static struct qed_hash_iscsi_con *qed_iscsi_get_hash(struct qed_dev *cdev,
1060                              u32 handle)
1061 {
1062     struct qed_hash_iscsi_con *hash_con = NULL;
1063 
1064     if (!(cdev->flags & QED_FLAG_STORAGE_STARTED))
1065         return NULL;
1066 
1067     hash_for_each_possible(cdev->connections, hash_con, node, handle) {
1068         if (hash_con->con->icid == handle)
1069             break;
1070     }
1071 
1072     if (!hash_con || (hash_con->con->icid != handle))
1073         return NULL;
1074 
1075     return hash_con;
1076 }
1077 
1078 static int qed_iscsi_stop(struct qed_dev *cdev)
1079 {
1080     int rc;
1081 
1082     if (!(cdev->flags & QED_FLAG_STORAGE_STARTED)) {
1083         DP_NOTICE(cdev, "iscsi already stopped\n");
1084         return 0;
1085     }
1086 
1087     if (!hash_empty(cdev->connections)) {
1088         DP_NOTICE(cdev,
1089               "Can't stop iscsi - not all connections were returned\n");
1090         return -EINVAL;
1091     }
1092 
1093     /* Stop the iscsi */
1094     rc = qed_sp_iscsi_func_stop(QED_AFFIN_HWFN(cdev), QED_SPQ_MODE_EBLOCK,
1095                     NULL);
1096     cdev->flags &= ~QED_FLAG_STORAGE_STARTED;
1097 
1098     return rc;
1099 }
1100 
1101 static int qed_iscsi_start(struct qed_dev *cdev,
1102                struct qed_iscsi_tid *tasks,
1103                void *event_context,
1104                iscsi_event_cb_t async_event_cb)
1105 {
1106     int rc;
1107     struct qed_tid_mem *tid_info;
1108 
1109     if (cdev->flags & QED_FLAG_STORAGE_STARTED) {
1110         DP_NOTICE(cdev, "iscsi already started;\n");
1111         return 0;
1112     }
1113 
1114     rc = qed_sp_iscsi_func_start(QED_AFFIN_HWFN(cdev), QED_SPQ_MODE_EBLOCK,
1115                      NULL, event_context, async_event_cb);
1116     if (rc) {
1117         DP_NOTICE(cdev, "Failed to start iscsi\n");
1118         return rc;
1119     }
1120 
1121     cdev->flags |= QED_FLAG_STORAGE_STARTED;
1122     hash_init(cdev->connections);
1123 
1124     if (!tasks)
1125         return 0;
1126 
1127     tid_info = kzalloc(sizeof(*tid_info), GFP_KERNEL);
1128 
1129     if (!tid_info) {
1130         qed_iscsi_stop(cdev);
1131         return -ENOMEM;
1132     }
1133 
1134     rc = qed_cxt_get_tid_mem_info(QED_AFFIN_HWFN(cdev), tid_info);
1135     if (rc) {
1136         DP_NOTICE(cdev, "Failed to gather task information\n");
1137         qed_iscsi_stop(cdev);
1138         kfree(tid_info);
1139         return rc;
1140     }
1141 
1142     /* Fill task information */
1143     tasks->size = tid_info->tid_size;
1144     tasks->num_tids_per_block = tid_info->num_tids_per_block;
1145     memcpy(tasks->blocks, tid_info->blocks,
1146            MAX_TID_BLOCKS_ISCSI * sizeof(u8 *));
1147 
1148     kfree(tid_info);
1149 
1150     return 0;
1151 }
1152 
1153 static int qed_iscsi_acquire_conn(struct qed_dev *cdev,
1154                   u32 *handle,
1155                   u32 *fw_cid, void __iomem **p_doorbell)
1156 {
1157     struct qed_hash_iscsi_con *hash_con;
1158     int rc;
1159 
1160     /* Allocate a hashed connection */
1161     hash_con = kzalloc(sizeof(*hash_con), GFP_ATOMIC);
1162     if (!hash_con)
1163         return -ENOMEM;
1164 
1165     /* Acquire the connection */
1166     rc = qed_iscsi_acquire_connection(QED_AFFIN_HWFN(cdev), NULL,
1167                       &hash_con->con);
1168     if (rc) {
1169         DP_NOTICE(cdev, "Failed to acquire Connection\n");
1170         kfree(hash_con);
1171         return rc;
1172     }
1173 
1174     /* Added the connection to hash table */
1175     *handle = hash_con->con->icid;
1176     *fw_cid = hash_con->con->fw_cid;
1177     hash_add(cdev->connections, &hash_con->node, *handle);
1178 
1179     if (p_doorbell)
1180         *p_doorbell = qed_iscsi_get_db_addr(QED_AFFIN_HWFN(cdev),
1181                             *handle);
1182 
1183     return 0;
1184 }
1185 
1186 static int qed_iscsi_release_conn(struct qed_dev *cdev, u32 handle)
1187 {
1188     struct qed_hash_iscsi_con *hash_con;
1189 
1190     hash_con = qed_iscsi_get_hash(cdev, handle);
1191     if (!hash_con) {
1192         DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
1193               handle);
1194         return -EINVAL;
1195     }
1196 
1197     hlist_del(&hash_con->node);
1198     qed_iscsi_release_connection(QED_AFFIN_HWFN(cdev), hash_con->con);
1199     kfree(hash_con);
1200 
1201     return 0;
1202 }
1203 
1204 static int qed_iscsi_offload_conn(struct qed_dev *cdev,
1205                   u32 handle,
1206                   struct qed_iscsi_params_offload *conn_info)
1207 {
1208     struct qed_hash_iscsi_con *hash_con;
1209     struct qed_iscsi_conn *con;
1210 
1211     hash_con = qed_iscsi_get_hash(cdev, handle);
1212     if (!hash_con) {
1213         DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
1214               handle);
1215         return -EINVAL;
1216     }
1217 
1218     /* Update the connection with information from the params */
1219     con = hash_con->con;
1220 
1221     ether_addr_copy(con->local_mac, conn_info->src.mac);
1222     ether_addr_copy(con->remote_mac, conn_info->dst.mac);
1223     memcpy(con->local_ip, conn_info->src.ip, sizeof(con->local_ip));
1224     memcpy(con->remote_ip, conn_info->dst.ip, sizeof(con->remote_ip));
1225     con->local_port = conn_info->src.port;
1226     con->remote_port = conn_info->dst.port;
1227 
1228     con->layer_code = conn_info->layer_code;
1229     con->sq_pbl_addr = conn_info->sq_pbl_addr;
1230     con->initial_ack = conn_info->initial_ack;
1231     con->vlan_id = conn_info->vlan_id;
1232     con->tcp_flags = conn_info->tcp_flags;
1233     con->ip_version = conn_info->ip_version;
1234     con->default_cq = conn_info->default_cq;
1235     con->ka_max_probe_cnt = conn_info->ka_max_probe_cnt;
1236     con->dup_ack_theshold = conn_info->dup_ack_theshold;
1237     con->rcv_next = conn_info->rcv_next;
1238     con->snd_una = conn_info->snd_una;
1239     con->snd_next = conn_info->snd_next;
1240     con->snd_max = conn_info->snd_max;
1241     con->snd_wnd = conn_info->snd_wnd;
1242     con->rcv_wnd = conn_info->rcv_wnd;
1243     con->snd_wl1 = conn_info->snd_wl1;
1244     con->cwnd = conn_info->cwnd;
1245     con->ss_thresh = conn_info->ss_thresh;
1246     con->srtt = conn_info->srtt;
1247     con->rtt_var = conn_info->rtt_var;
1248     con->ts_recent = conn_info->ts_recent;
1249     con->ts_recent_age = conn_info->ts_recent_age;
1250     con->total_rt = conn_info->total_rt;
1251     con->ka_timeout_delta = conn_info->ka_timeout_delta;
1252     con->rt_timeout_delta = conn_info->rt_timeout_delta;
1253     con->dup_ack_cnt = conn_info->dup_ack_cnt;
1254     con->snd_wnd_probe_cnt = conn_info->snd_wnd_probe_cnt;
1255     con->ka_probe_cnt = conn_info->ka_probe_cnt;
1256     con->rt_cnt = conn_info->rt_cnt;
1257     con->flow_label = conn_info->flow_label;
1258     con->ka_timeout = conn_info->ka_timeout;
1259     con->ka_interval = conn_info->ka_interval;
1260     con->max_rt_time = conn_info->max_rt_time;
1261     con->initial_rcv_wnd = conn_info->initial_rcv_wnd;
1262     con->ttl = conn_info->ttl;
1263     con->tos_or_tc = conn_info->tos_or_tc;
1264     con->remote_port = conn_info->remote_port;
1265     con->local_port = conn_info->local_port;
1266     con->mss = conn_info->mss;
1267     con->snd_wnd_scale = conn_info->snd_wnd_scale;
1268     con->rcv_wnd_scale = conn_info->rcv_wnd_scale;
1269     con->da_timeout_value = conn_info->da_timeout_value;
1270     con->ack_frequency = conn_info->ack_frequency;
1271 
1272     /* Set default values on other connection fields */
1273     con->offl_flags = 0x1;
1274 
1275     return qed_sp_iscsi_conn_offload(QED_AFFIN_HWFN(cdev), con,
1276                      QED_SPQ_MODE_EBLOCK, NULL);
1277 }
1278 
1279 static int qed_iscsi_update_conn(struct qed_dev *cdev,
1280                  u32 handle,
1281                  struct qed_iscsi_params_update *conn_info)
1282 {
1283     struct qed_hash_iscsi_con *hash_con;
1284     struct qed_iscsi_conn *con;
1285 
1286     hash_con = qed_iscsi_get_hash(cdev, handle);
1287     if (!hash_con) {
1288         DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
1289               handle);
1290         return -EINVAL;
1291     }
1292 
1293     /* Update the connection with information from the params */
1294     con = hash_con->con;
1295     con->update_flag = conn_info->update_flag;
1296     con->max_seq_size = conn_info->max_seq_size;
1297     con->max_recv_pdu_length = conn_info->max_recv_pdu_length;
1298     con->max_send_pdu_length = conn_info->max_send_pdu_length;
1299     con->first_seq_length = conn_info->first_seq_length;
1300     con->exp_stat_sn = conn_info->exp_stat_sn;
1301 
1302     return qed_sp_iscsi_conn_update(QED_AFFIN_HWFN(cdev), con,
1303                     QED_SPQ_MODE_EBLOCK, NULL);
1304 }
1305 
1306 static int qed_iscsi_clear_conn_sq(struct qed_dev *cdev, u32 handle)
1307 {
1308     struct qed_hash_iscsi_con *hash_con;
1309 
1310     hash_con = qed_iscsi_get_hash(cdev, handle);
1311     if (!hash_con) {
1312         DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
1313               handle);
1314         return -EINVAL;
1315     }
1316 
1317     return qed_sp_iscsi_conn_clear_sq(QED_AFFIN_HWFN(cdev), hash_con->con,
1318                       QED_SPQ_MODE_EBLOCK, NULL);
1319 }
1320 
1321 static int qed_iscsi_destroy_conn(struct qed_dev *cdev,
1322                   u32 handle, u8 abrt_conn)
1323 {
1324     struct qed_hash_iscsi_con *hash_con;
1325 
1326     hash_con = qed_iscsi_get_hash(cdev, handle);
1327     if (!hash_con) {
1328         DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
1329               handle);
1330         return -EINVAL;
1331     }
1332 
1333     hash_con->con->abortive_dsconnect = abrt_conn;
1334 
1335     return qed_sp_iscsi_conn_terminate(QED_AFFIN_HWFN(cdev), hash_con->con,
1336                        QED_SPQ_MODE_EBLOCK, NULL);
1337 }
1338 
1339 static int qed_iscsi_stats(struct qed_dev *cdev, struct qed_iscsi_stats *stats)
1340 {
1341     return qed_iscsi_get_stats(QED_AFFIN_HWFN(cdev), stats);
1342 }
1343 
1344 static int qed_iscsi_change_mac(struct qed_dev *cdev,
1345                 u32 handle, const u8 *mac)
1346 {
1347     struct qed_hash_iscsi_con *hash_con;
1348 
1349     hash_con = qed_iscsi_get_hash(cdev, handle);
1350     if (!hash_con) {
1351         DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
1352               handle);
1353         return -EINVAL;
1354     }
1355 
1356     return qed_sp_iscsi_mac_update(QED_AFFIN_HWFN(cdev), hash_con->con,
1357                        QED_SPQ_MODE_EBLOCK, NULL);
1358 }
1359 
1360 void qed_get_protocol_stats_iscsi(struct qed_dev *cdev,
1361                   struct qed_mcp_iscsi_stats *stats)
1362 {
1363     struct qed_iscsi_stats proto_stats;
1364 
1365     /* Retrieve FW statistics */
1366     memset(&proto_stats, 0, sizeof(proto_stats));
1367     if (qed_iscsi_stats(cdev, &proto_stats)) {
1368         DP_VERBOSE(cdev, QED_MSG_STORAGE,
1369                "Failed to collect ISCSI statistics\n");
1370         return;
1371     }
1372 
1373     /* Translate FW statistics into struct */
1374     stats->rx_pdus = proto_stats.iscsi_rx_total_pdu_cnt;
1375     stats->tx_pdus = proto_stats.iscsi_tx_total_pdu_cnt;
1376     stats->rx_bytes = proto_stats.iscsi_rx_bytes_cnt;
1377     stats->tx_bytes = proto_stats.iscsi_tx_bytes_cnt;
1378 }
1379 
1380 static const struct qed_iscsi_ops qed_iscsi_ops_pass = {
1381     .common = &qed_common_ops_pass,
1382     .ll2 = &qed_ll2_ops_pass,
1383     .fill_dev_info = &qed_fill_iscsi_dev_info,
1384     .register_ops = &qed_register_iscsi_ops,
1385     .start = &qed_iscsi_start,
1386     .stop = &qed_iscsi_stop,
1387     .acquire_conn = &qed_iscsi_acquire_conn,
1388     .release_conn = &qed_iscsi_release_conn,
1389     .offload_conn = &qed_iscsi_offload_conn,
1390     .update_conn = &qed_iscsi_update_conn,
1391     .destroy_conn = &qed_iscsi_destroy_conn,
1392     .clear_sq = &qed_iscsi_clear_conn_sq,
1393     .get_stats = &qed_iscsi_stats,
1394     .change_mac = &qed_iscsi_change_mac,
1395 };
1396 
1397 const struct qed_iscsi_ops *qed_get_iscsi_ops(void)
1398 {
1399     return &qed_iscsi_ops_pass;
1400 }
1401 EXPORT_SYMBOL(qed_get_iscsi_ops);
1402 
1403 void qed_put_iscsi_ops(void)
1404 {
1405 }
1406 EXPORT_SYMBOL(qed_put_iscsi_ops);
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