drivers/net/ethernet/qlogic/qed/qed_iscsi.c

   1 /* QLogic qed NIC Driver
   2  * Copyright (c) 2015-2017  QLogic Corporation
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and /or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32
  33 #include <linux/types.h>
  34 #include <asm/byteorder.h>
  35 #include <asm/param.h>
  36 #include <linux/delay.h>
  37 #include <linux/dma-mapping.h>
  38 #include <linux/etherdevice.h>
  39 #include <linux/interrupt.h>
  40 #include <linux/kernel.h>
  41 #include <linux/log2.h>
  42 #include <linux/module.h>
  43 #include <linux/pci.h>
  44 #include <linux/slab.h>
  45 #include <linux/stddef.h>
  46 #include <linux/string.h>
  47 #include <linux/version.h>
  48 #include <linux/workqueue.h>
  49 #include <linux/errno.h>
  50 #include <linux/list.h>
  51 #include <linux/spinlock.h>
  52 #include <linux/qed/qed_iscsi_if.h>
  53 #include "qed.h"
  54 #include "qed_cxt.h"
  55 #include "qed_dev_api.h"
  56 #include "qed_hsi.h"
  57 #include "qed_hw.h"
  58 #include "qed_int.h"
  59 #include "qed_iscsi.h"
  60 #include "qed_ll2.h"
  61 #include "qed_mcp.h"
  62 #include "qed_sp.h"
  63 #include "qed_sriov.h"
  64 #include "qed_reg_addr.h"
  65
  66 struct qed_iscsi_conn {
  67         struct list_head list_entry;
  68         bool free_on_delete;
  69
  70         u16 conn_id;
  71         u32 icid;
  72         u32 fw_cid;
  73
  74         u8 layer_code;
  75         u8 offl_flags;
  76         u8 connect_mode;
  77         u32 initial_ack;
  78         dma_addr_t sq_pbl_addr;
  79         struct qed_chain r2tq;
  80         struct qed_chain xhq;
  81         struct qed_chain uhq;
  82
  83         struct tcp_upload_params *tcp_upload_params_virt_addr;
  84         dma_addr_t tcp_upload_params_phys_addr;
  85         struct scsi_terminate_extra_params *queue_cnts_virt_addr;
  86         dma_addr_t queue_cnts_phys_addr;
  87         dma_addr_t syn_phy_addr;
  88
  89         u16 syn_ip_payload_length;
  90         u8 local_mac[6];
  91         u8 remote_mac[6];
  92         u16 vlan_id;
  93         u8 tcp_flags;
  94         u8 ip_version;
  95         u32 remote_ip[4];
  96         u32 local_ip[4];
  97         u8 ka_max_probe_cnt;
  98         u8 dup_ack_theshold;
  99         u32 rcv_next;
 100         u32 snd_una;
 101         u32 snd_next;
 102         u32 snd_max;
 103         u32 snd_wnd;
 104         u32 rcv_wnd;
 105         u32 snd_wl1;
 106         u32 cwnd;
 107         u32 ss_thresh;
 108         u16 srtt;
 109         u16 rtt_var;
 110         u32 ts_time;
 111         u32 ts_recent;
 112         u32 ts_recent_age;
 113         u32 total_rt;
 114         u32 ka_timeout_delta;
 115         u32 rt_timeout_delta;
 116         u8 dup_ack_cnt;
 117         u8 snd_wnd_probe_cnt;
 118         u8 ka_probe_cnt;
 119         u8 rt_cnt;
 120         u32 flow_label;
 121         u32 ka_timeout;
 122         u32 ka_interval;
 123         u32 max_rt_time;
 124         u32 initial_rcv_wnd;
 125         u8 ttl;
 126         u8 tos_or_tc;
 127         u16 remote_port;
 128         u16 local_port;
 129         u16 mss;
 130         u8 snd_wnd_scale;
 131         u8 rcv_wnd_scale;
 132         u32 ts_ticks_per_second;
 133         u16 da_timeout_value;
 134         u8 ack_frequency;
 135
 136         u8 update_flag;
 137         u8 default_cq;
 138         u32 max_seq_size;
 139         u32 max_recv_pdu_length;
 140         u32 max_send_pdu_length;
 141         u32 first_seq_length;
 142         u32 exp_stat_sn;
 143         u32 stat_sn;
 144         u16 physical_q0;
 145         u16 physical_q1;
 146         u8 abortive_dsconnect;
 147 };
 148
 149 static int
 150 qed_sp_iscsi_func_start(struct qed_hwfn *p_hwfn,
 151                         enum spq_mode comp_mode,
 152                         struct qed_spq_comp_cb *p_comp_addr,
 153                         void *event_context, iscsi_event_cb_t async_event_cb)
 154 {
 155         struct iscsi_init_ramrod_params *p_ramrod = NULL;
 156         struct scsi_init_func_queues *p_queue = NULL;
 157         struct qed_iscsi_pf_params *p_params = NULL;
 158         struct iscsi_spe_func_init *p_init = NULL;
 159         struct qed_spq_entry *p_ent = NULL;
 160         struct qed_sp_init_data init_data;
 161         int rc = 0;
 162         u32 dval;
 163         u16 val;
 164         u8 i;
 165
 166         /* Get SPQ entry */
 167         memset(&init_data, 0, sizeof(init_data));
 168         init_data.cid = qed_spq_get_cid(p_hwfn);
 169         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 170         init_data.comp_mode = comp_mode;
 171         init_data.p_comp_data = p_comp_addr;
 172
 173         rc = qed_sp_init_request(p_hwfn, &p_ent,
 174                                  ISCSI_RAMROD_CMD_ID_INIT_FUNC,
 175                                  PROTOCOLID_ISCSI, &init_data);
 176         if (rc)
 177                 return rc;
 178
 179         p_ramrod = &p_ent->ramrod.iscsi_init;
 180         p_init = &p_ramrod->iscsi_init_spe;
 181         p_params = &p_hwfn->pf_params.iscsi_pf_params;
 182         p_queue = &p_init->q_params;
 183
 184         SET_FIELD(p_init->hdr.flags,
 185                   ISCSI_SLOW_PATH_HDR_LAYER_CODE, ISCSI_SLOW_PATH_LAYER_CODE);
 186         p_init->hdr.op_code = ISCSI_RAMROD_CMD_ID_INIT_FUNC;
 187
 188         val = p_params->half_way_close_timeout;
 189         p_init->half_way_close_timeout = cpu_to_le16(val);
 190         p_init->num_sq_pages_in_ring = p_params->num_sq_pages_in_ring;
 191         p_init->num_r2tq_pages_in_ring = p_params->num_r2tq_pages_in_ring;
 192         p_init->num_uhq_pages_in_ring = p_params->num_uhq_pages_in_ring;
 193         p_init->func_params.log_page_size = p_params->log_page_size;
 194         val = p_params->num_tasks;
 195         p_init->func_params.num_tasks = cpu_to_le16(val);
 196         p_init->debug_mode.flags = p_params->debug_mode;
 197
 198         DMA_REGPAIR_LE(p_queue->glbl_q_params_addr,
 199                        p_params->glbl_q_params_addr);
 200
 201         val = p_params->cq_num_entries;
 202         p_queue->cq_num_entries = cpu_to_le16(val);
 203         val = p_params->cmdq_num_entries;
 204         p_queue->cmdq_num_entries = cpu_to_le16(val);
 205         p_queue->num_queues = p_params->num_queues;
 206         dval = (u8)p_hwfn->hw_info.resc_start[QED_CMDQS_CQS];
 207         p_queue->queue_relative_offset = (u8)dval;
 208         p_queue->cq_sb_pi = p_params->gl_rq_pi;
 209         p_queue->cmdq_sb_pi = p_params->gl_cmd_pi;
 210
 211         for (i = 0; i < p_params->num_queues; i++) {
 212                 val = p_hwfn->sbs_info[i]->igu_sb_id;
 213                 p_queue->cq_cmdq_sb_num_arr[i] = cpu_to_le16(val);
 214         }
 215
 216         p_queue->bdq_resource_id = ISCSI_BDQ_ID(p_hwfn->port_id);
 217
 218         DMA_REGPAIR_LE(p_queue->bdq_pbl_base_address[BDQ_ID_RQ],
 219                        p_params->bdq_pbl_base_addr[BDQ_ID_RQ]);
 220         p_queue->bdq_pbl_num_entries[BDQ_ID_RQ] =
 221             p_params->bdq_pbl_num_entries[BDQ_ID_RQ];
 222         val = p_params->bdq_xoff_threshold[BDQ_ID_RQ];
 223         p_queue->bdq_xoff_threshold[BDQ_ID_RQ] = cpu_to_le16(val);
 224         val = p_params->bdq_xon_threshold[BDQ_ID_RQ];
 225         p_queue->bdq_xon_threshold[BDQ_ID_RQ] = cpu_to_le16(val);
 226
 227         DMA_REGPAIR_LE(p_queue->bdq_pbl_base_address[BDQ_ID_IMM_DATA],
 228                        p_params->bdq_pbl_base_addr[BDQ_ID_IMM_DATA]);
 229         p_queue->bdq_pbl_num_entries[BDQ_ID_IMM_DATA] =
 230             p_params->bdq_pbl_num_entries[BDQ_ID_IMM_DATA];
 231         val = p_params->bdq_xoff_threshold[BDQ_ID_IMM_DATA];
 232         p_queue->bdq_xoff_threshold[BDQ_ID_IMM_DATA] = cpu_to_le16(val);
 233         val = p_params->bdq_xon_threshold[BDQ_ID_IMM_DATA];
 234         p_queue->bdq_xon_threshold[BDQ_ID_IMM_DATA] = cpu_to_le16(val);
 235         val = p_params->rq_buffer_size;
 236         p_queue->rq_buffer_size = cpu_to_le16(val);
 237         if (p_params->is_target) {
 238                 SET_FIELD(p_queue->q_validity,
 239                           SCSI_INIT_FUNC_QUEUES_RQ_VALID, 1);
 240                 if (p_queue->bdq_pbl_num_entries[BDQ_ID_IMM_DATA])
 241                         SET_FIELD(p_queue->q_validity,
 242                                   SCSI_INIT_FUNC_QUEUES_IMM_DATA_VALID, 1);
 243                 SET_FIELD(p_queue->q_validity,
 244                           SCSI_INIT_FUNC_QUEUES_CMD_VALID, 1);
 245         } else {
 246                 SET_FIELD(p_queue->q_validity,
 247                           SCSI_INIT_FUNC_QUEUES_RQ_VALID, 1);
 248         }
 249         p_ramrod->tcp_init.two_msl_timer = cpu_to_le32(p_params->two_msl_timer);
 250         val = p_params->tx_sws_timer;
 251         p_ramrod->tcp_init.tx_sws_timer = cpu_to_le16(val);
 252         p_ramrod->tcp_init.maxfinrt = p_params->max_fin_rt;
 253
 254         p_hwfn->p_iscsi_info->event_context = event_context;
 255         p_hwfn->p_iscsi_info->event_cb = async_event_cb;
 256
 257         return qed_spq_post(p_hwfn, p_ent, NULL);
 258 }
 259
 260 static int qed_sp_iscsi_conn_offload(struct qed_hwfn *p_hwfn,
 261                                      struct qed_iscsi_conn *p_conn,
 262                                      enum spq_mode comp_mode,
 263                                      struct qed_spq_comp_cb *p_comp_addr)
 264 {
 265         struct iscsi_spe_conn_offload *p_ramrod = NULL;
 266         struct tcp_offload_params_opt2 *p_tcp2 = NULL;
 267         struct tcp_offload_params *p_tcp = NULL;
 268         struct qed_spq_entry *p_ent = NULL;
 269         struct qed_sp_init_data init_data;
 270         union qed_qm_pq_params pq_params;
 271         u16 pq0_id = 0, pq1_id = 0;
 272         dma_addr_t r2tq_pbl_addr;
 273         dma_addr_t xhq_pbl_addr;
 274         dma_addr_t uhq_pbl_addr;
 275         int rc = 0;
 276         u32 dval;
 277         u16 wval;
 278         u8 i;
 279         u16 *p;
 280
 281         /* Get SPQ entry */
 282         memset(&init_data, 0, sizeof(init_data));
 283         init_data.cid = p_conn->icid;
 284         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 285         init_data.comp_mode = comp_mode;
 286         init_data.p_comp_data = p_comp_addr;
 287
 288         rc = qed_sp_init_request(p_hwfn, &p_ent,
 289                                  ISCSI_RAMROD_CMD_ID_OFFLOAD_CONN,
 290                                  PROTOCOLID_ISCSI, &init_data);
 291         if (rc)
 292                 return rc;
 293
 294         p_ramrod = &p_ent->ramrod.iscsi_conn_offload;
 295
 296         /* Transmission PQ is the first of the PF */
 297         memset(&pq_params, 0, sizeof(pq_params));
 298         pq0_id = qed_get_qm_pq(p_hwfn, PROTOCOLID_ISCSI, &pq_params);
 299         p_conn->physical_q0 = cpu_to_le16(pq0_id);
 300         p_ramrod->iscsi.physical_q0 = cpu_to_le16(pq0_id);
 301
 302         /* iSCSI Pure-ACK PQ */
 303         pq_params.iscsi.q_idx = 1;
 304         pq1_id = qed_get_qm_pq(p_hwfn, PROTOCOLID_ISCSI, &pq_params);
 305         p_conn->physical_q1 = cpu_to_le16(pq1_id);
 306         p_ramrod->iscsi.physical_q1 = cpu_to_le16(pq1_id);
 307
 308         p_ramrod->hdr.op_code = ISCSI_RAMROD_CMD_ID_OFFLOAD_CONN;
 309         SET_FIELD(p_ramrod->hdr.flags, ISCSI_SLOW_PATH_HDR_LAYER_CODE,
 310                   p_conn->layer_code);
 311
 312         p_ramrod->conn_id = cpu_to_le16(p_conn->conn_id);
 313         p_ramrod->fw_cid = cpu_to_le32(p_conn->icid);
 314
 315         DMA_REGPAIR_LE(p_ramrod->iscsi.sq_pbl_addr, p_conn->sq_pbl_addr);
 316
 317         r2tq_pbl_addr = qed_chain_get_pbl_phys(&p_conn->r2tq);
 318         DMA_REGPAIR_LE(p_ramrod->iscsi.r2tq_pbl_addr, r2tq_pbl_addr);
 319
 320         xhq_pbl_addr = qed_chain_get_pbl_phys(&p_conn->xhq);
 321         DMA_REGPAIR_LE(p_ramrod->iscsi.xhq_pbl_addr, xhq_pbl_addr);
 322
 323         uhq_pbl_addr = qed_chain_get_pbl_phys(&p_conn->uhq);
 324         DMA_REGPAIR_LE(p_ramrod->iscsi.uhq_pbl_addr, uhq_pbl_addr);
 325
 326         p_ramrod->iscsi.initial_ack = cpu_to_le32(p_conn->initial_ack);
 327         p_ramrod->iscsi.flags = p_conn->offl_flags;
 328         p_ramrod->iscsi.default_cq = p_conn->default_cq;
 329         p_ramrod->iscsi.stat_sn = cpu_to_le32(p_conn->stat_sn);
 330
 331         if (!GET_FIELD(p_ramrod->iscsi.flags,
 332                        ISCSI_CONN_OFFLOAD_PARAMS_TCP_ON_CHIP_1B)) {
 333                 p_tcp = &p_ramrod->tcp;
 334
 335                 p = (u16 *)p_conn->local_mac;
 336                 p_tcp->local_mac_addr_hi = swab16(get_unaligned(p));
 337                 p_tcp->local_mac_addr_mid = swab16(get_unaligned(p + 1));
 338                 p_tcp->local_mac_addr_lo = swab16(get_unaligned(p + 2));
 339
 340                 p = (u16 *)p_conn->remote_mac;
 341                 p_tcp->remote_mac_addr_hi = swab16(get_unaligned(p));
 342                 p_tcp->remote_mac_addr_mid = swab16(get_unaligned(p + 1));
 343                 p_tcp->remote_mac_addr_lo = swab16(get_unaligned(p + 2));
 344
 345                 p_tcp->vlan_id = cpu_to_le16(p_conn->vlan_id);
 346
 347                 p_tcp->flags = p_conn->tcp_flags;
 348                 p_tcp->ip_version = p_conn->ip_version;
 349                 for (i = 0; i < 4; i++) {
 350                         dval = p_conn->remote_ip[i];
 351                         p_tcp->remote_ip[i] = cpu_to_le32(dval);
 352                         dval = p_conn->local_ip[i];
 353                         p_tcp->local_ip[i] = cpu_to_le32(dval);
 354                 }
 355                 p_tcp->ka_max_probe_cnt = p_conn->ka_max_probe_cnt;
 356                 p_tcp->dup_ack_theshold = p_conn->dup_ack_theshold;
 357
 358                 p_tcp->rcv_next = cpu_to_le32(p_conn->rcv_next);
 359                 p_tcp->snd_una = cpu_to_le32(p_conn->snd_una);
 360                 p_tcp->snd_next = cpu_to_le32(p_conn->snd_next);
 361                 p_tcp->snd_max = cpu_to_le32(p_conn->snd_max);
 362                 p_tcp->snd_wnd = cpu_to_le32(p_conn->snd_wnd);
 363                 p_tcp->rcv_wnd = cpu_to_le32(p_conn->rcv_wnd);
 364                 p_tcp->snd_wl1 = cpu_to_le32(p_conn->snd_wl1);
 365                 p_tcp->cwnd = cpu_to_le32(p_conn->cwnd);
 366                 p_tcp->ss_thresh = cpu_to_le32(p_conn->ss_thresh);
 367                 p_tcp->srtt = cpu_to_le16(p_conn->srtt);
 368                 p_tcp->rtt_var = cpu_to_le16(p_conn->rtt_var);
 369                 p_tcp->ts_time = cpu_to_le32(p_conn->ts_time);
 370                 p_tcp->ts_recent = cpu_to_le32(p_conn->ts_recent);
 371                 p_tcp->ts_recent_age = cpu_to_le32(p_conn->ts_recent_age);
 372                 p_tcp->total_rt = cpu_to_le32(p_conn->total_rt);
 373                 dval = p_conn->ka_timeout_delta;
 374                 p_tcp->ka_timeout_delta = cpu_to_le32(dval);
 375                 dval = p_conn->rt_timeout_delta;
 376                 p_tcp->rt_timeout_delta = cpu_to_le32(dval);
 377                 p_tcp->dup_ack_cnt = p_conn->dup_ack_cnt;
 378                 p_tcp->snd_wnd_probe_cnt = p_conn->snd_wnd_probe_cnt;
 379                 p_tcp->ka_probe_cnt = p_conn->ka_probe_cnt;
 380                 p_tcp->rt_cnt = p_conn->rt_cnt;
 381                 p_tcp->flow_label = cpu_to_le32(p_conn->flow_label);
 382                 p_tcp->ka_timeout = cpu_to_le32(p_conn->ka_timeout);
 383                 p_tcp->ka_interval = cpu_to_le32(p_conn->ka_interval);
 384                 p_tcp->max_rt_time = cpu_to_le32(p_conn->max_rt_time);
 385                 dval = p_conn->initial_rcv_wnd;
 386                 p_tcp->initial_rcv_wnd = cpu_to_le32(dval);
 387                 p_tcp->ttl = p_conn->ttl;
 388                 p_tcp->tos_or_tc = p_conn->tos_or_tc;
 389                 p_tcp->remote_port = cpu_to_le16(p_conn->remote_port);
 390                 p_tcp->local_port = cpu_to_le16(p_conn->local_port);
 391                 p_tcp->mss = cpu_to_le16(p_conn->mss);
 392                 p_tcp->snd_wnd_scale = p_conn->snd_wnd_scale;
 393                 p_tcp->rcv_wnd_scale = p_conn->rcv_wnd_scale;
 394                 dval = p_conn->ts_ticks_per_second;
 395                 p_tcp->ts_ticks_per_second = cpu_to_le32(dval);
 396                 wval = p_conn->da_timeout_value;
 397                 p_tcp->da_timeout_value = cpu_to_le16(wval);
 398                 p_tcp->ack_frequency = p_conn->ack_frequency;
 399                 p_tcp->connect_mode = p_conn->connect_mode;
 400         } else {
 401                 p_tcp2 =
 402                     &((struct iscsi_spe_conn_offload_option2 *)p_ramrod)->tcp;
 403
 404                 p = (u16 *)p_conn->local_mac;
 405                 p_tcp2->local_mac_addr_hi = swab16(get_unaligned(p));
 406                 p_tcp2->local_mac_addr_mid = swab16(get_unaligned(p + 1));
 407                 p_tcp2->local_mac_addr_lo = swab16(get_unaligned(p + 2));
 408
 409                 p = (u16 *)p_conn->remote_mac;
 410                 p_tcp2->remote_mac_addr_hi = swab16(get_unaligned(p));
 411                 p_tcp2->remote_mac_addr_mid = swab16(get_unaligned(p + 1));
 412                 p_tcp2->remote_mac_addr_lo = swab16(get_unaligned(p + 2));
 413
 414                 p_tcp2->vlan_id = cpu_to_le16(p_conn->vlan_id);
 415                 p_tcp2->flags = p_conn->tcp_flags;
 416
 417                 p_tcp2->ip_version = p_conn->ip_version;
 418                 for (i = 0; i < 4; i++) {
 419                         dval = p_conn->remote_ip[i];
 420                         p_tcp2->remote_ip[i] = cpu_to_le32(dval);
 421                         dval = p_conn->local_ip[i];
 422                         p_tcp2->local_ip[i] = cpu_to_le32(dval);
 423                 }
 424
 425                 p_tcp2->flow_label = cpu_to_le32(p_conn->flow_label);
 426                 p_tcp2->ttl = p_conn->ttl;
 427                 p_tcp2->tos_or_tc = p_conn->tos_or_tc;
 428                 p_tcp2->remote_port = cpu_to_le16(p_conn->remote_port);
 429                 p_tcp2->local_port = cpu_to_le16(p_conn->local_port);
 430                 p_tcp2->mss = cpu_to_le16(p_conn->mss);
 431                 p_tcp2->rcv_wnd_scale = p_conn->rcv_wnd_scale;
 432                 p_tcp2->connect_mode = p_conn->connect_mode;
 433                 wval = p_conn->syn_ip_payload_length;
 434                 p_tcp2->syn_ip_payload_length = cpu_to_le16(wval);
 435                 p_tcp2->syn_phy_addr_lo = DMA_LO_LE(p_conn->syn_phy_addr);
 436                 p_tcp2->syn_phy_addr_hi = DMA_HI_LE(p_conn->syn_phy_addr);
 437         }
 438
 439         return qed_spq_post(p_hwfn, p_ent, NULL);
 440 }
 441
 442 static int qed_sp_iscsi_conn_update(struct qed_hwfn *p_hwfn,
 443                                     struct qed_iscsi_conn *p_conn,
 444                                     enum spq_mode comp_mode,
 445                                     struct qed_spq_comp_cb *p_comp_addr)
 446 {
 447         struct iscsi_conn_update_ramrod_params *p_ramrod = NULL;
 448         struct qed_spq_entry *p_ent = NULL;
 449         struct qed_sp_init_data init_data;
 450         int rc = -EINVAL;
 451         u32 dval;
 452
 453         /* Get SPQ entry */
 454         memset(&init_data, 0, sizeof(init_data));
 455         init_data.cid = p_conn->icid;
 456         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 457         init_data.comp_mode = comp_mode;
 458         init_data.p_comp_data = p_comp_addr;
 459
 460         rc = qed_sp_init_request(p_hwfn, &p_ent,
 461                                  ISCSI_RAMROD_CMD_ID_UPDATE_CONN,
 462                                  PROTOCOLID_ISCSI, &init_data);
 463         if (rc)
 464                 return rc;
 465
 466         p_ramrod = &p_ent->ramrod.iscsi_conn_update;
 467         p_ramrod->hdr.op_code = ISCSI_RAMROD_CMD_ID_UPDATE_CONN;
 468         SET_FIELD(p_ramrod->hdr.flags,
 469                   ISCSI_SLOW_PATH_HDR_LAYER_CODE, p_conn->layer_code);
 470
 471         p_ramrod->conn_id = cpu_to_le16(p_conn->conn_id);
 472         p_ramrod->fw_cid = cpu_to_le32(p_conn->icid);
 473         p_ramrod->flags = p_conn->update_flag;
 474         p_ramrod->max_seq_size = cpu_to_le32(p_conn->max_seq_size);
 475         dval = p_conn->max_recv_pdu_length;
 476         p_ramrod->max_recv_pdu_length = cpu_to_le32(dval);
 477         dval = p_conn->max_send_pdu_length;
 478         p_ramrod->max_send_pdu_length = cpu_to_le32(dval);
 479         dval = p_conn->first_seq_length;
 480         p_ramrod->first_seq_length = cpu_to_le32(dval);
 481         p_ramrod->exp_stat_sn = cpu_to_le32(p_conn->exp_stat_sn);
 482
 483         return qed_spq_post(p_hwfn, p_ent, NULL);
 484 }
 485
 486 static int qed_sp_iscsi_conn_terminate(struct qed_hwfn *p_hwfn,
 487                                        struct qed_iscsi_conn *p_conn,
 488                                        enum spq_mode comp_mode,
 489                                        struct qed_spq_comp_cb *p_comp_addr)
 490 {
 491         struct iscsi_spe_conn_termination *p_ramrod = NULL;
 492         struct qed_spq_entry *p_ent = NULL;
 493         struct qed_sp_init_data init_data;
 494         int rc = -EINVAL;
 495
 496         /* Get SPQ entry */
 497         memset(&init_data, 0, sizeof(init_data));
 498         init_data.cid = p_conn->icid;
 499         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 500         init_data.comp_mode = comp_mode;
 501         init_data.p_comp_data = p_comp_addr;
 502
 503         rc = qed_sp_init_request(p_hwfn, &p_ent,
 504                                  ISCSI_RAMROD_CMD_ID_TERMINATION_CONN,
 505                                  PROTOCOLID_ISCSI, &init_data);
 506         if (rc)
 507                 return rc;
 508
 509         p_ramrod = &p_ent->ramrod.iscsi_conn_terminate;
 510         p_ramrod->hdr.op_code = ISCSI_RAMROD_CMD_ID_TERMINATION_CONN;
 511         SET_FIELD(p_ramrod->hdr.flags,
 512                   ISCSI_SLOW_PATH_HDR_LAYER_CODE, p_conn->layer_code);
 513
 514         p_ramrod->conn_id = cpu_to_le16(p_conn->conn_id);
 515         p_ramrod->fw_cid = cpu_to_le32(p_conn->icid);
 516         p_ramrod->abortive = p_conn->abortive_dsconnect;
 517
 518         DMA_REGPAIR_LE(p_ramrod->query_params_addr,
 519                        p_conn->tcp_upload_params_phys_addr);
 520         DMA_REGPAIR_LE(p_ramrod->queue_cnts_addr, p_conn->queue_cnts_phys_addr);
 521
 522         return qed_spq_post(p_hwfn, p_ent, NULL);
 523 }
 524
 525 static int qed_sp_iscsi_conn_clear_sq(struct qed_hwfn *p_hwfn,
 526                                       struct qed_iscsi_conn *p_conn,
 527                                       enum spq_mode comp_mode,
 528                                       struct qed_spq_comp_cb *p_comp_addr)
 529 {
 530         struct iscsi_slow_path_hdr *p_ramrod = NULL;
 531         struct qed_spq_entry *p_ent = NULL;
 532         struct qed_sp_init_data init_data;
 533         int rc = -EINVAL;
 534
 535         /* Get SPQ entry */
 536         memset(&init_data, 0, sizeof(init_data));
 537         init_data.cid = p_conn->icid;
 538         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 539         init_data.comp_mode = comp_mode;
 540         init_data.p_comp_data = p_comp_addr;
 541
 542         rc = qed_sp_init_request(p_hwfn, &p_ent,
 543                                  ISCSI_RAMROD_CMD_ID_CLEAR_SQ,
 544                                  PROTOCOLID_ISCSI, &init_data);
 545         if (rc)
 546                 return rc;
 547
 548         p_ramrod = &p_ent->ramrod.iscsi_empty;
 549         p_ramrod->op_code = ISCSI_RAMROD_CMD_ID_CLEAR_SQ;
 550         SET_FIELD(p_ramrod->flags,
 551                   ISCSI_SLOW_PATH_HDR_LAYER_CODE, p_conn->layer_code);
 552
 553         return qed_spq_post(p_hwfn, p_ent, NULL);
 554 }
 555
 556 static int qed_sp_iscsi_func_stop(struct qed_hwfn *p_hwfn,
 557                                   enum spq_mode comp_mode,
 558                                   struct qed_spq_comp_cb *p_comp_addr)
 559 {
 560         struct iscsi_spe_func_dstry *p_ramrod = NULL;
 561         struct qed_spq_entry *p_ent = NULL;
 562         struct qed_sp_init_data init_data;
 563         int rc = 0;
 564
 565         /* Get SPQ entry */
 566         memset(&init_data, 0, sizeof(init_data));
 567         init_data.cid = qed_spq_get_cid(p_hwfn);
 568         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 569         init_data.comp_mode = comp_mode;
 570         init_data.p_comp_data = p_comp_addr;
 571
 572         rc = qed_sp_init_request(p_hwfn, &p_ent,
 573                                  ISCSI_RAMROD_CMD_ID_DESTROY_FUNC,
 574                                  PROTOCOLID_ISCSI, &init_data);
 575         if (rc)
 576                 return rc;
 577
 578         p_ramrod = &p_ent->ramrod.iscsi_destroy;
 579         p_ramrod->hdr.op_code = ISCSI_RAMROD_CMD_ID_DESTROY_FUNC;
 580
 581         return qed_spq_post(p_hwfn, p_ent, NULL);
 582 }
 583
 584 static void __iomem *qed_iscsi_get_db_addr(struct qed_hwfn *p_hwfn, u32 cid)
 585 {
 586         return (u8 __iomem *)p_hwfn->doorbells +
 587                              qed_db_addr(cid, DQ_DEMS_LEGACY);
 588 }
 589
 590 static void __iomem *qed_iscsi_get_primary_bdq_prod(struct qed_hwfn *p_hwfn,
 591                                                     u8 bdq_id)
 592 {
 593         u8 bdq_function_id = ISCSI_BDQ_ID(p_hwfn->port_id);
 594
 595         return (u8 __iomem *)p_hwfn->regview + GTT_BAR0_MAP_REG_MSDM_RAM +
 596                              MSTORM_SCSI_BDQ_EXT_PROD_OFFSET(bdq_function_id,
 597                                                              bdq_id);
 598 }
 599
 600 static void __iomem *qed_iscsi_get_secondary_bdq_prod(struct qed_hwfn *p_hwfn,
 601                                                       u8 bdq_id)
 602 {
 603         u8 bdq_function_id = ISCSI_BDQ_ID(p_hwfn->port_id);
 604
 605         return (u8 __iomem *)p_hwfn->regview + GTT_BAR0_MAP_REG_TSDM_RAM +
 606                              TSTORM_SCSI_BDQ_EXT_PROD_OFFSET(bdq_function_id,
 607                                                              bdq_id);
 608 }
 609
 610 static int qed_iscsi_setup_connection(struct qed_hwfn *p_hwfn,
 611                                       struct qed_iscsi_conn *p_conn)
 612 {
 613         if (!p_conn->queue_cnts_virt_addr)
 614                 goto nomem;
 615         memset(p_conn->queue_cnts_virt_addr, 0,
 616                sizeof(*p_conn->queue_cnts_virt_addr));
 617
 618         if (!p_conn->tcp_upload_params_virt_addr)
 619                 goto nomem;
 620         memset(p_conn->tcp_upload_params_virt_addr, 0,
 621                sizeof(*p_conn->tcp_upload_params_virt_addr));
 622
 623         if (!p_conn->r2tq.p_virt_addr)
 624                 goto nomem;
 625         qed_chain_pbl_zero_mem(&p_conn->r2tq);
 626
 627         if (!p_conn->uhq.p_virt_addr)
 628                 goto nomem;
 629         qed_chain_pbl_zero_mem(&p_conn->uhq);
 630
 631         if (!p_conn->xhq.p_virt_addr)
 632                 goto nomem;
 633         qed_chain_pbl_zero_mem(&p_conn->xhq);
 634
 635         return 0;
 636 nomem:
 637         return -ENOMEM;
 638 }
 639
 640 static int qed_iscsi_allocate_connection(struct qed_hwfn *p_hwfn,
 641                                          struct qed_iscsi_conn **p_out_conn)
 642 {
 643         u16 uhq_num_elements = 0, xhq_num_elements = 0, r2tq_num_elements = 0;
 644         struct scsi_terminate_extra_params *p_q_cnts = NULL;
 645         struct qed_iscsi_pf_params *p_params = NULL;
 646         struct tcp_upload_params *p_tcp = NULL;
 647         struct qed_iscsi_conn *p_conn = NULL;
 648         int rc = 0;
 649
 650         /* Try finding a free connection that can be used */
 651         spin_lock_bh(&p_hwfn->p_iscsi_info->lock);
 652         if (!list_empty(&p_hwfn->p_iscsi_info->free_list))
 653                 p_conn = list_first_entry(&p_hwfn->p_iscsi_info->free_list,
 654                                           struct qed_iscsi_conn, list_entry);
 655         if (p_conn) {
 656                 list_del(&p_conn->list_entry);
 657                 spin_unlock_bh(&p_hwfn->p_iscsi_info->lock);
 658                 *p_out_conn = p_conn;
 659                 return 0;
 660         }
 661         spin_unlock_bh(&p_hwfn->p_iscsi_info->lock);
 662
 663         /* Need to allocate a new connection */
 664         p_params = &p_hwfn->pf_params.iscsi_pf_params;
 665
 666         p_conn = kzalloc(sizeof(*p_conn), GFP_KERNEL);
 667         if (!p_conn)
 668                 return -ENOMEM;
 669
 670         p_q_cnts = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
 671                                       sizeof(*p_q_cnts),
 672                                       &p_conn->queue_cnts_phys_addr,
 673                                       GFP_KERNEL);
 674         if (!p_q_cnts)
 675                 goto nomem_queue_cnts_param;
 676         p_conn->queue_cnts_virt_addr = p_q_cnts;
 677
 678         p_tcp = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
 679                                    sizeof(*p_tcp),
 680                                    &p_conn->tcp_upload_params_phys_addr,
 681                                    GFP_KERNEL);
 682         if (!p_tcp)
 683                 goto nomem_upload_param;
 684         p_conn->tcp_upload_params_virt_addr = p_tcp;
 685
 686         r2tq_num_elements = p_params->num_r2tq_pages_in_ring *
 687                             QED_CHAIN_PAGE_SIZE / 0x80;
 688         rc = qed_chain_alloc(p_hwfn->cdev,
 689                              QED_CHAIN_USE_TO_CONSUME_PRODUCE,
 690                              QED_CHAIN_MODE_PBL,
 691                              QED_CHAIN_CNT_TYPE_U16,
 692                              r2tq_num_elements, 0x80, &p_conn->r2tq);
 693         if (rc)
 694                 goto nomem_r2tq;
 695
 696         uhq_num_elements = p_params->num_uhq_pages_in_ring *
 697                            QED_CHAIN_PAGE_SIZE / sizeof(struct iscsi_uhqe);
 698         rc = qed_chain_alloc(p_hwfn->cdev,
 699                              QED_CHAIN_USE_TO_CONSUME_PRODUCE,
 700                              QED_CHAIN_MODE_PBL,
 701                              QED_CHAIN_CNT_TYPE_U16,
 702                              uhq_num_elements,
 703                              sizeof(struct iscsi_uhqe), &p_conn->uhq);
 704         if (rc)
 705                 goto nomem_uhq;
 706
 707         xhq_num_elements = uhq_num_elements;
 708         rc = qed_chain_alloc(p_hwfn->cdev,
 709                              QED_CHAIN_USE_TO_CONSUME_PRODUCE,
 710                              QED_CHAIN_MODE_PBL,
 711                              QED_CHAIN_CNT_TYPE_U16,
 712                              xhq_num_elements,
 713                              sizeof(struct iscsi_xhqe), &p_conn->xhq);
 714         if (rc)
 715                 goto nomem;
 716
 717         p_conn->free_on_delete = true;
 718         *p_out_conn = p_conn;
 719         return 0;
 720
 721 nomem:
 722         qed_chain_free(p_hwfn->cdev, &p_conn->uhq);
 723 nomem_uhq:
 724         qed_chain_free(p_hwfn->cdev, &p_conn->r2tq);
 725 nomem_r2tq:
 726         dma_free_coherent(&p_hwfn->cdev->pdev->dev,
 727                           sizeof(struct tcp_upload_params),
 728                           p_conn->tcp_upload_params_virt_addr,
 729                           p_conn->tcp_upload_params_phys_addr);
 730 nomem_upload_param:
 731         dma_free_coherent(&p_hwfn->cdev->pdev->dev,
 732                           sizeof(struct scsi_terminate_extra_params),
 733                           p_conn->queue_cnts_virt_addr,
 734                           p_conn->queue_cnts_phys_addr);
 735 nomem_queue_cnts_param:
 736         kfree(p_conn);
 737
 738         return -ENOMEM;
 739 }
 740
 741 static int qed_iscsi_acquire_connection(struct qed_hwfn *p_hwfn,
 742                                         struct qed_iscsi_conn *p_in_conn,
 743                                         struct qed_iscsi_conn **p_out_conn)
 744 {
 745         struct qed_iscsi_conn *p_conn = NULL;
 746         int rc = 0;
 747         u32 icid;
 748
 749         spin_lock_bh(&p_hwfn->p_iscsi_info->lock);
 750         rc = qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_ISCSI, &icid);
 751         spin_unlock_bh(&p_hwfn->p_iscsi_info->lock);
 752         if (rc)
 753                 return rc;
 754
 755         /* Use input connection or allocate a new one */
 756         if (p_in_conn)
 757                 p_conn = p_in_conn;
 758         else
 759                 rc = qed_iscsi_allocate_connection(p_hwfn, &p_conn);
 760
 761         if (!rc)
 762                 rc = qed_iscsi_setup_connection(p_hwfn, p_conn);
 763
 764         if (rc) {
 765                 spin_lock_bh(&p_hwfn->p_iscsi_info->lock);
 766                 qed_cxt_release_cid(p_hwfn, icid);
 767                 spin_unlock_bh(&p_hwfn->p_iscsi_info->lock);
 768                 return rc;
 769         }
 770
 771         p_conn->icid = icid;
 772         p_conn->conn_id = (u16)icid;
 773         p_conn->fw_cid = (p_hwfn->hw_info.opaque_fid << 16) | icid;
 774
 775         *p_out_conn = p_conn;
 776
 777         return rc;
 778 }
 779
 780 static void qed_iscsi_release_connection(struct qed_hwfn *p_hwfn,
 781                                          struct qed_iscsi_conn *p_conn)
 782 {
 783         spin_lock_bh(&p_hwfn->p_iscsi_info->lock);
 784         list_add_tail(&p_conn->list_entry, &p_hwfn->p_iscsi_info->free_list);
 785         qed_cxt_release_cid(p_hwfn, p_conn->icid);
 786         spin_unlock_bh(&p_hwfn->p_iscsi_info->lock);
 787 }
 788
 789 struct qed_iscsi_info *qed_iscsi_alloc(struct qed_hwfn *p_hwfn)
 790 {
 791         struct qed_iscsi_info *p_iscsi_info;
 792
 793         p_iscsi_info = kzalloc(sizeof(*p_iscsi_info), GFP_KERNEL);
 794         if (!p_iscsi_info)
 795                 return NULL;
 796
 797         INIT_LIST_HEAD(&p_iscsi_info->free_list);
 798         return p_iscsi_info;
 799 }
 800
 801 void qed_iscsi_setup(struct qed_hwfn *p_hwfn,
 802                      struct qed_iscsi_info *p_iscsi_info)
 803 {
 804         spin_lock_init(&p_iscsi_info->lock);
 805 }
 806
 807 void qed_iscsi_free(struct qed_hwfn *p_hwfn,
 808                     struct qed_iscsi_info *p_iscsi_info)
 809 {
 810         kfree(p_iscsi_info);
 811 }
 812
 813 static void _qed_iscsi_get_tstats(struct qed_hwfn *p_hwfn,
 814                                   struct qed_ptt *p_ptt,
 815                                   struct qed_iscsi_stats *p_stats)
 816 {
 817         struct tstorm_iscsi_stats_drv tstats;
 818         u32 tstats_addr;
 819
 820         memset(&tstats, 0, sizeof(tstats));
 821         tstats_addr = BAR0_MAP_REG_TSDM_RAM +
 822                       TSTORM_ISCSI_RX_STATS_OFFSET(p_hwfn->rel_pf_id);
 823         qed_memcpy_from(p_hwfn, p_ptt, &tstats, tstats_addr, sizeof(tstats));
 824
 825         p_stats->iscsi_rx_bytes_cnt =
 826             HILO_64_REGPAIR(tstats.iscsi_rx_bytes_cnt);
 827         p_stats->iscsi_rx_packet_cnt =
 828             HILO_64_REGPAIR(tstats.iscsi_rx_packet_cnt);
 829         p_stats->iscsi_cmdq_threshold_cnt =
 830             le32_to_cpu(tstats.iscsi_cmdq_threshold_cnt);
 831         p_stats->iscsi_rq_threshold_cnt =
 832             le32_to_cpu(tstats.iscsi_rq_threshold_cnt);
 833         p_stats->iscsi_immq_threshold_cnt =
 834             le32_to_cpu(tstats.iscsi_immq_threshold_cnt);
 835 }
 836
 837 static void _qed_iscsi_get_mstats(struct qed_hwfn *p_hwfn,
 838                                   struct qed_ptt *p_ptt,
 839                                   struct qed_iscsi_stats *p_stats)
 840 {
 841         struct mstorm_iscsi_stats_drv mstats;
 842         u32 mstats_addr;
 843
 844         memset(&mstats, 0, sizeof(mstats));
 845         mstats_addr = BAR0_MAP_REG_MSDM_RAM +
 846                       MSTORM_ISCSI_RX_STATS_OFFSET(p_hwfn->rel_pf_id);
 847         qed_memcpy_from(p_hwfn, p_ptt, &mstats, mstats_addr, sizeof(mstats));
 848
 849         p_stats->iscsi_rx_dropped_pdus_task_not_valid =
 850             HILO_64_REGPAIR(mstats.iscsi_rx_dropped_pdus_task_not_valid);
 851 }
 852
 853 static void _qed_iscsi_get_ustats(struct qed_hwfn *p_hwfn,
 854                                   struct qed_ptt *p_ptt,
 855                                   struct qed_iscsi_stats *p_stats)
 856 {
 857         struct ustorm_iscsi_stats_drv ustats;
 858         u32 ustats_addr;
 859
 860         memset(&ustats, 0, sizeof(ustats));
 861         ustats_addr = BAR0_MAP_REG_USDM_RAM +
 862                       USTORM_ISCSI_RX_STATS_OFFSET(p_hwfn->rel_pf_id);
 863         qed_memcpy_from(p_hwfn, p_ptt, &ustats, ustats_addr, sizeof(ustats));
 864
 865         p_stats->iscsi_rx_data_pdu_cnt =
 866             HILO_64_REGPAIR(ustats.iscsi_rx_data_pdu_cnt);
 867         p_stats->iscsi_rx_r2t_pdu_cnt =
 868             HILO_64_REGPAIR(ustats.iscsi_rx_r2t_pdu_cnt);
 869         p_stats->iscsi_rx_total_pdu_cnt =
 870             HILO_64_REGPAIR(ustats.iscsi_rx_total_pdu_cnt);
 871 }
 872
 873 static void _qed_iscsi_get_xstats(struct qed_hwfn *p_hwfn,
 874                                   struct qed_ptt *p_ptt,
 875                                   struct qed_iscsi_stats *p_stats)
 876 {
 877         struct xstorm_iscsi_stats_drv xstats;
 878         u32 xstats_addr;
 879
 880         memset(&xstats, 0, sizeof(xstats));
 881         xstats_addr = BAR0_MAP_REG_XSDM_RAM +
 882                       XSTORM_ISCSI_TX_STATS_OFFSET(p_hwfn->rel_pf_id);
 883         qed_memcpy_from(p_hwfn, p_ptt, &xstats, xstats_addr, sizeof(xstats));
 884
 885         p_stats->iscsi_tx_go_to_slow_start_event_cnt =
 886             HILO_64_REGPAIR(xstats.iscsi_tx_go_to_slow_start_event_cnt);
 887         p_stats->iscsi_tx_fast_retransmit_event_cnt =
 888             HILO_64_REGPAIR(xstats.iscsi_tx_fast_retransmit_event_cnt);
 889 }
 890
 891 static void _qed_iscsi_get_ystats(struct qed_hwfn *p_hwfn,
 892                                   struct qed_ptt *p_ptt,
 893                                   struct qed_iscsi_stats *p_stats)
 894 {
 895         struct ystorm_iscsi_stats_drv ystats;
 896         u32 ystats_addr;
 897
 898         memset(&ystats, 0, sizeof(ystats));
 899         ystats_addr = BAR0_MAP_REG_YSDM_RAM +
 900                       YSTORM_ISCSI_TX_STATS_OFFSET(p_hwfn->rel_pf_id);
 901         qed_memcpy_from(p_hwfn, p_ptt, &ystats, ystats_addr, sizeof(ystats));
 902
 903         p_stats->iscsi_tx_data_pdu_cnt =
 904             HILO_64_REGPAIR(ystats.iscsi_tx_data_pdu_cnt);
 905         p_stats->iscsi_tx_r2t_pdu_cnt =
 906             HILO_64_REGPAIR(ystats.iscsi_tx_r2t_pdu_cnt);
 907         p_stats->iscsi_tx_total_pdu_cnt =
 908             HILO_64_REGPAIR(ystats.iscsi_tx_total_pdu_cnt);
 909 }
 910
 911 static void _qed_iscsi_get_pstats(struct qed_hwfn *p_hwfn,
 912                                   struct qed_ptt *p_ptt,
 913                                   struct qed_iscsi_stats *p_stats)
 914 {
 915         struct pstorm_iscsi_stats_drv pstats;
 916         u32 pstats_addr;
 917
 918         memset(&pstats, 0, sizeof(pstats));
 919         pstats_addr = BAR0_MAP_REG_PSDM_RAM +
 920                       PSTORM_ISCSI_TX_STATS_OFFSET(p_hwfn->rel_pf_id);
 921         qed_memcpy_from(p_hwfn, p_ptt, &pstats, pstats_addr, sizeof(pstats));
 922
 923         p_stats->iscsi_tx_bytes_cnt =
 924             HILO_64_REGPAIR(pstats.iscsi_tx_bytes_cnt);
 925         p_stats->iscsi_tx_packet_cnt =
 926             HILO_64_REGPAIR(pstats.iscsi_tx_packet_cnt);
 927 }
 928
 929 static int qed_iscsi_get_stats(struct qed_hwfn *p_hwfn,
 930                                struct qed_iscsi_stats *stats)
 931 {
 932         struct qed_ptt *p_ptt;
 933
 934         memset(stats, 0, sizeof(*stats));
 935
 936         p_ptt = qed_ptt_acquire(p_hwfn);
 937         if (!p_ptt) {
 938                 DP_ERR(p_hwfn, "Failed to acquire ptt\n");
 939                 return -EAGAIN;
 940         }
 941
 942         _qed_iscsi_get_tstats(p_hwfn, p_ptt, stats);
 943         _qed_iscsi_get_mstats(p_hwfn, p_ptt, stats);
 944         _qed_iscsi_get_ustats(p_hwfn, p_ptt, stats);
 945
 946         _qed_iscsi_get_xstats(p_hwfn, p_ptt, stats);
 947         _qed_iscsi_get_ystats(p_hwfn, p_ptt, stats);
 948         _qed_iscsi_get_pstats(p_hwfn, p_ptt, stats);
 949
 950         qed_ptt_release(p_hwfn, p_ptt);
 951
 952         return 0;
 953 }
 954
 955 struct qed_hash_iscsi_con {
 956         struct hlist_node node;
 957         struct qed_iscsi_conn *con;
 958 };
 959
 960 static int qed_fill_iscsi_dev_info(struct qed_dev *cdev,
 961                                    struct qed_dev_iscsi_info *info)
 962 {
 963         struct qed_hwfn *hwfn = QED_LEADING_HWFN(cdev);
 964
 965         int rc;
 966
 967         memset(info, 0, sizeof(*info));
 968         rc = qed_fill_dev_info(cdev, &info->common);
 969
 970         info->primary_dbq_rq_addr =
 971             qed_iscsi_get_primary_bdq_prod(hwfn, BDQ_ID_RQ);
 972         info->secondary_bdq_rq_addr =
 973             qed_iscsi_get_secondary_bdq_prod(hwfn, BDQ_ID_RQ);
 974
 975         return rc;
 976 }
 977
 978 static void qed_register_iscsi_ops(struct qed_dev *cdev,
 979                                    struct qed_iscsi_cb_ops *ops, void *cookie)
 980 {
 981         cdev->protocol_ops.iscsi = ops;
 982         cdev->ops_cookie = cookie;
 983 }
 984
 985 static struct qed_hash_iscsi_con *qed_iscsi_get_hash(struct qed_dev *cdev,
 986                                                      u32 handle)
 987 {
 988         struct qed_hash_iscsi_con *hash_con = NULL;
 989
 990         if (!(cdev->flags & QED_FLAG_STORAGE_STARTED))
 991                 return NULL;
 992
 993         hash_for_each_possible(cdev->connections, hash_con, node, handle) {
 994                 if (hash_con->con->icid == handle)
 995                         break;
 996         }
 997
 998         if (!hash_con || (hash_con->con->icid != handle))
 999                 return NULL;
1000
1001         return hash_con;
1002 }
1003
1004 static int qed_iscsi_stop(struct qed_dev *cdev)
1005 {
1006         int rc;
1007
1008         if (!(cdev->flags & QED_FLAG_STORAGE_STARTED)) {
1009                 DP_NOTICE(cdev, "iscsi already stopped\n");
1010                 return 0;
1011         }
1012
1013         if (!hash_empty(cdev->connections)) {
1014                 DP_NOTICE(cdev,
1015                           "Can't stop iscsi - not all connections were returned\n");
1016                 return -EINVAL;
1017         }
1018
1019         /* Stop the iscsi */
1020         rc = qed_sp_iscsi_func_stop(QED_LEADING_HWFN(cdev),
1021                                     QED_SPQ_MODE_EBLOCK, NULL);
1022         cdev->flags &= ~QED_FLAG_STORAGE_STARTED;
1023
1024         return rc;
1025 }
1026
1027 static int qed_iscsi_start(struct qed_dev *cdev,
1028                            struct qed_iscsi_tid *tasks,
1029                            void *event_context,
1030                            iscsi_event_cb_t async_event_cb)
1031 {
1032         int rc;
1033         struct qed_tid_mem *tid_info;
1034
1035         if (cdev->flags & QED_FLAG_STORAGE_STARTED) {
1036                 DP_NOTICE(cdev, "iscsi already started;\n");
1037                 return 0;
1038         }
1039
1040         rc = qed_sp_iscsi_func_start(QED_LEADING_HWFN(cdev),
1041                                      QED_SPQ_MODE_EBLOCK, NULL, event_context,
1042                                      async_event_cb);
1043         if (rc) {
1044                 DP_NOTICE(cdev, "Failed to start iscsi\n");
1045                 return rc;
1046         }
1047
1048         cdev->flags |= QED_FLAG_STORAGE_STARTED;
1049         hash_init(cdev->connections);
1050
1051         if (!tasks)
1052                 return 0;
1053
1054         tid_info = kzalloc(sizeof(*tid_info), GFP_KERNEL);
1055
1056         if (!tid_info) {
1057                 qed_iscsi_stop(cdev);
1058                 return -ENOMEM;
1059         }
1060
1061         rc = qed_cxt_get_tid_mem_info(QED_LEADING_HWFN(cdev),
1062                                       tid_info);
1063         if (rc) {
1064                 DP_NOTICE(cdev, "Failed to gather task information\n");
1065                 qed_iscsi_stop(cdev);
1066                 kfree(tid_info);
1067                 return rc;
1068         }
1069
1070         /* Fill task information */
1071         tasks->size = tid_info->tid_size;
1072         tasks->num_tids_per_block = tid_info->num_tids_per_block;
1073         memcpy(tasks->blocks, tid_info->blocks,
1074                MAX_TID_BLOCKS_ISCSI * sizeof(u8 *));
1075
1076         kfree(tid_info);
1077
1078         return 0;
1079 }
1080
1081 static int qed_iscsi_acquire_conn(struct qed_dev *cdev,
1082                                   u32 *handle,
1083                                   u32 *fw_cid, void __iomem **p_doorbell)
1084 {
1085         struct qed_hash_iscsi_con *hash_con;
1086         int rc;
1087
1088         /* Allocate a hashed connection */
1089         hash_con = kzalloc(sizeof(*hash_con), GFP_ATOMIC);
1090         if (!hash_con)
1091                 return -ENOMEM;
1092
1093         /* Acquire the connection */
1094         rc = qed_iscsi_acquire_connection(QED_LEADING_HWFN(cdev), NULL,
1095                                           &hash_con->con);
1096         if (rc) {
1097                 DP_NOTICE(cdev, "Failed to acquire Connection\n");
1098                 kfree(hash_con);
1099                 return rc;
1100         }
1101
1102         /* Added the connection to hash table */
1103         *handle = hash_con->con->icid;
1104         *fw_cid = hash_con->con->fw_cid;
1105         hash_add(cdev->connections, &hash_con->node, *handle);
1106
1107         if (p_doorbell)
1108                 *p_doorbell = qed_iscsi_get_db_addr(QED_LEADING_HWFN(cdev),
1109                                                     *handle);
1110
1111         return 0;
1112 }
1113
1114 static int qed_iscsi_release_conn(struct qed_dev *cdev, u32 handle)
1115 {
1116         struct qed_hash_iscsi_con *hash_con;
1117
1118         hash_con = qed_iscsi_get_hash(cdev, handle);
1119         if (!hash_con) {
1120                 DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
1121                           handle);
1122                 return -EINVAL;
1123         }
1124
1125         hlist_del(&hash_con->node);
1126         qed_iscsi_release_connection(QED_LEADING_HWFN(cdev), hash_con->con);
1127         kfree(hash_con);
1128
1129         return 0;
1130 }
1131
1132 static int qed_iscsi_offload_conn(struct qed_dev *cdev,
1133                                   u32 handle,
1134                                   struct qed_iscsi_params_offload *conn_info)
1135 {
1136         struct qed_hash_iscsi_con *hash_con;
1137         struct qed_iscsi_conn *con;
1138
1139         hash_con = qed_iscsi_get_hash(cdev, handle);
1140         if (!hash_con) {
1141                 DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
1142                           handle);
1143                 return -EINVAL;
1144         }
1145
1146         /* Update the connection with information from the params */
1147         con = hash_con->con;
1148
1149         ether_addr_copy(con->local_mac, conn_info->src.mac);
1150         ether_addr_copy(con->remote_mac, conn_info->dst.mac);
1151         memcpy(con->local_ip, conn_info->src.ip, sizeof(con->local_ip));
1152         memcpy(con->remote_ip, conn_info->dst.ip, sizeof(con->remote_ip));
1153         con->local_port = conn_info->src.port;
1154         con->remote_port = conn_info->dst.port;
1155
1156         con->layer_code = conn_info->layer_code;
1157         con->sq_pbl_addr = conn_info->sq_pbl_addr;
1158         con->initial_ack = conn_info->initial_ack;
1159         con->vlan_id = conn_info->vlan_id;
1160         con->tcp_flags = conn_info->tcp_flags;
1161         con->ip_version = conn_info->ip_version;
1162         con->default_cq = conn_info->default_cq;
1163         con->ka_max_probe_cnt = conn_info->ka_max_probe_cnt;
1164         con->dup_ack_theshold = conn_info->dup_ack_theshold;
1165         con->rcv_next = conn_info->rcv_next;
1166         con->snd_una = conn_info->snd_una;
1167         con->snd_next = conn_info->snd_next;
1168         con->snd_max = conn_info->snd_max;
1169         con->snd_wnd = conn_info->snd_wnd;
1170         con->rcv_wnd = conn_info->rcv_wnd;
1171         con->snd_wl1 = conn_info->snd_wl1;
1172         con->cwnd = conn_info->cwnd;
1173         con->ss_thresh = conn_info->ss_thresh;
1174         con->srtt = conn_info->srtt;
1175         con->rtt_var = conn_info->rtt_var;
1176         con->ts_time = conn_info->ts_time;
1177         con->ts_recent = conn_info->ts_recent;
1178         con->ts_recent_age = conn_info->ts_recent_age;
1179         con->total_rt = conn_info->total_rt;
1180         con->ka_timeout_delta = conn_info->ka_timeout_delta;
1181         con->rt_timeout_delta = conn_info->rt_timeout_delta;
1182         con->dup_ack_cnt = conn_info->dup_ack_cnt;
1183         con->snd_wnd_probe_cnt = conn_info->snd_wnd_probe_cnt;
1184         con->ka_probe_cnt = conn_info->ka_probe_cnt;
1185         con->rt_cnt = conn_info->rt_cnt;
1186         con->flow_label = conn_info->flow_label;
1187         con->ka_timeout = conn_info->ka_timeout;
1188         con->ka_interval = conn_info->ka_interval;
1189         con->max_rt_time = conn_info->max_rt_time;
1190         con->initial_rcv_wnd = conn_info->initial_rcv_wnd;
1191         con->ttl = conn_info->ttl;
1192         con->tos_or_tc = conn_info->tos_or_tc;
1193         con->remote_port = conn_info->remote_port;
1194         con->local_port = conn_info->local_port;
1195         con->mss = conn_info->mss;
1196         con->snd_wnd_scale = conn_info->snd_wnd_scale;
1197         con->rcv_wnd_scale = conn_info->rcv_wnd_scale;
1198         con->ts_ticks_per_second = conn_info->ts_ticks_per_second;
1199         con->da_timeout_value = conn_info->da_timeout_value;
1200         con->ack_frequency = conn_info->ack_frequency;
1201
1202         /* Set default values on other connection fields */
1203         con->offl_flags = 0x1;
1204
1205         return qed_sp_iscsi_conn_offload(QED_LEADING_HWFN(cdev), con,
1206                                          QED_SPQ_MODE_EBLOCK, NULL);
1207 }
1208
1209 static int qed_iscsi_update_conn(struct qed_dev *cdev,
1210                                  u32 handle,
1211                                  struct qed_iscsi_params_update *conn_info)
1212 {
1213         struct qed_hash_iscsi_con *hash_con;
1214         struct qed_iscsi_conn *con;
1215
1216         hash_con = qed_iscsi_get_hash(cdev, handle);
1217         if (!hash_con) {
1218                 DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
1219                           handle);
1220                 return -EINVAL;
1221         }
1222
1223         /* Update the connection with information from the params */
1224         con = hash_con->con;
1225         con->update_flag = conn_info->update_flag;
1226         con->max_seq_size = conn_info->max_seq_size;
1227         con->max_recv_pdu_length = conn_info->max_recv_pdu_length;
1228         con->max_send_pdu_length = conn_info->max_send_pdu_length;
1229         con->first_seq_length = conn_info->first_seq_length;
1230         con->exp_stat_sn = conn_info->exp_stat_sn;
1231
1232         return qed_sp_iscsi_conn_update(QED_LEADING_HWFN(cdev), con,
1233                                         QED_SPQ_MODE_EBLOCK, NULL);
1234 }
1235
1236 static int qed_iscsi_clear_conn_sq(struct qed_dev *cdev, u32 handle)
1237 {
1238         struct qed_hash_iscsi_con *hash_con;
1239
1240         hash_con = qed_iscsi_get_hash(cdev, handle);
1241         if (!hash_con) {
1242                 DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
1243                           handle);
1244                 return -EINVAL;
1245         }
1246
1247         return qed_sp_iscsi_conn_clear_sq(QED_LEADING_HWFN(cdev),
1248                                           hash_con->con,
1249                                           QED_SPQ_MODE_EBLOCK, NULL);
1250 }
1251
1252 static int qed_iscsi_destroy_conn(struct qed_dev *cdev,
1253                                   u32 handle, u8 abrt_conn)
1254 {
1255         struct qed_hash_iscsi_con *hash_con;
1256
1257         hash_con = qed_iscsi_get_hash(cdev, handle);
1258         if (!hash_con) {
1259                 DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
1260                           handle);
1261                 return -EINVAL;
1262         }
1263
1264         hash_con->con->abortive_dsconnect = abrt_conn;
1265
1266         return qed_sp_iscsi_conn_terminate(QED_LEADING_HWFN(cdev),
1267                                            hash_con->con,
1268                                            QED_SPQ_MODE_EBLOCK, NULL);
1269 }
1270
1271 static int qed_iscsi_stats(struct qed_dev *cdev, struct qed_iscsi_stats *stats)
1272 {
1273         return qed_iscsi_get_stats(QED_LEADING_HWFN(cdev), stats);
1274 }
1275
1276 static const struct qed_iscsi_ops qed_iscsi_ops_pass = {
1277         .common = &qed_common_ops_pass,
1278         .ll2 = &qed_ll2_ops_pass,
1279         .fill_dev_info = &qed_fill_iscsi_dev_info,
1280         .register_ops = &qed_register_iscsi_ops,
1281         .start = &qed_iscsi_start,
1282         .stop = &qed_iscsi_stop,
1283         .acquire_conn = &qed_iscsi_acquire_conn,
1284         .release_conn = &qed_iscsi_release_conn,
1285         .offload_conn = &qed_iscsi_offload_conn,
1286         .update_conn = &qed_iscsi_update_conn,
1287         .destroy_conn = &qed_iscsi_destroy_conn,
1288         .clear_sq = &qed_iscsi_clear_conn_sq,
1289         .get_stats = &qed_iscsi_stats,
1290 };
1291
1292 const struct qed_iscsi_ops *qed_get_iscsi_ops(void)
1293 {
1294         return &qed_iscsi_ops_pass;
1295 }
1296 EXPORT_SYMBOL(qed_get_iscsi_ops);
1297
1298 void qed_put_iscsi_ops(void)
1299 {
1300 }
1301 EXPORT_SYMBOL(qed_put_iscsi_ops);