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->ooo_enable = p_params->ooo_enable;
 194         p_init->ll2_rx_queue_id = p_hwfn->hw_info.resc_start[QED_LL2_QUEUE] +
 195                                   p_params->ll2_ooo_queue_id;
 196         p_init->func_params.log_page_size = p_params->log_page_size;
 197         val = p_params->num_tasks;
 198         p_init->func_params.num_tasks = cpu_to_le16(val);
 199         p_init->debug_mode.flags = p_params->debug_mode;
 200
 201         DMA_REGPAIR_LE(p_queue->glbl_q_params_addr,
 202                        p_params->glbl_q_params_addr);
 203
 204         val = p_params->cq_num_entries;
 205         p_queue->cq_num_entries = cpu_to_le16(val);
 206         val = p_params->cmdq_num_entries;
 207         p_queue->cmdq_num_entries = cpu_to_le16(val);
 208         p_queue->num_queues = p_params->num_queues;
 209         dval = (u8)p_hwfn->hw_info.resc_start[QED_CMDQS_CQS];
 210         p_queue->queue_relative_offset = (u8)dval;
 211         p_queue->cq_sb_pi = p_params->gl_rq_pi;
 212         p_queue->cmdq_sb_pi = p_params->gl_cmd_pi;
 213
 214         for (i = 0; i < p_params->num_queues; i++) {
 215                 val = p_hwfn->sbs_info[i]->igu_sb_id;
 216                 p_queue->cq_cmdq_sb_num_arr[i] = cpu_to_le16(val);
 217         }
 218
 219         p_queue->bdq_resource_id = ISCSI_BDQ_ID(p_hwfn->port_id);
 220
 221         DMA_REGPAIR_LE(p_queue->bdq_pbl_base_address[BDQ_ID_RQ],
 222                        p_params->bdq_pbl_base_addr[BDQ_ID_RQ]);
 223         p_queue->bdq_pbl_num_entries[BDQ_ID_RQ] =
 224             p_params->bdq_pbl_num_entries[BDQ_ID_RQ];
 225         val = p_params->bdq_xoff_threshold[BDQ_ID_RQ];
 226         p_queue->bdq_xoff_threshold[BDQ_ID_RQ] = cpu_to_le16(val);
 227         val = p_params->bdq_xon_threshold[BDQ_ID_RQ];
 228         p_queue->bdq_xon_threshold[BDQ_ID_RQ] = cpu_to_le16(val);
 229
 230         DMA_REGPAIR_LE(p_queue->bdq_pbl_base_address[BDQ_ID_IMM_DATA],
 231                        p_params->bdq_pbl_base_addr[BDQ_ID_IMM_DATA]);
 232         p_queue->bdq_pbl_num_entries[BDQ_ID_IMM_DATA] =
 233             p_params->bdq_pbl_num_entries[BDQ_ID_IMM_DATA];
 234         val = p_params->bdq_xoff_threshold[BDQ_ID_IMM_DATA];
 235         p_queue->bdq_xoff_threshold[BDQ_ID_IMM_DATA] = cpu_to_le16(val);
 236         val = p_params->bdq_xon_threshold[BDQ_ID_IMM_DATA];
 237         p_queue->bdq_xon_threshold[BDQ_ID_IMM_DATA] = cpu_to_le16(val);
 238         val = p_params->rq_buffer_size;
 239         p_queue->rq_buffer_size = cpu_to_le16(val);
 240         if (p_params->is_target) {
 241                 SET_FIELD(p_queue->q_validity,
 242                           SCSI_INIT_FUNC_QUEUES_RQ_VALID, 1);
 243                 if (p_queue->bdq_pbl_num_entries[BDQ_ID_IMM_DATA])
 244                         SET_FIELD(p_queue->q_validity,
 245                                   SCSI_INIT_FUNC_QUEUES_IMM_DATA_VALID, 1);
 246                 SET_FIELD(p_queue->q_validity,
 247                           SCSI_INIT_FUNC_QUEUES_CMD_VALID, 1);
 248         } else {
 249                 SET_FIELD(p_queue->q_validity,
 250                           SCSI_INIT_FUNC_QUEUES_RQ_VALID, 1);
 251         }
 252         p_ramrod->tcp_init.two_msl_timer = cpu_to_le32(p_params->two_msl_timer);
 253         val = p_params->tx_sws_timer;
 254         p_ramrod->tcp_init.tx_sws_timer = cpu_to_le16(val);
 255         p_ramrod->tcp_init.maxfinrt = p_params->max_fin_rt;
 256
 257         p_hwfn->p_iscsi_info->event_context = event_context;
 258         p_hwfn->p_iscsi_info->event_cb = async_event_cb;
 259
 260         return qed_spq_post(p_hwfn, p_ent, NULL);
 261 }
 262
 263 static int qed_sp_iscsi_conn_offload(struct qed_hwfn *p_hwfn,
 264                                      struct qed_iscsi_conn *p_conn,
 265                                      enum spq_mode comp_mode,
 266                                      struct qed_spq_comp_cb *p_comp_addr)
 267 {
 268         struct iscsi_spe_conn_offload *p_ramrod = NULL;
 269         struct tcp_offload_params_opt2 *p_tcp2 = NULL;
 270         struct tcp_offload_params *p_tcp = NULL;
 271         struct qed_spq_entry *p_ent = NULL;
 272         struct qed_sp_init_data init_data;
 273         union qed_qm_pq_params pq_params;
 274         u16 pq0_id = 0, pq1_id = 0;
 275         dma_addr_t r2tq_pbl_addr;
 276         dma_addr_t xhq_pbl_addr;
 277         dma_addr_t uhq_pbl_addr;
 278         int rc = 0;
 279         u32 dval;
 280         u16 wval;
 281         u8 i;
 282         u16 *p;
 283
 284         /* Get SPQ entry */
 285         memset(&init_data, 0, sizeof(init_data));
 286         init_data.cid = p_conn->icid;
 287         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 288         init_data.comp_mode = comp_mode;
 289         init_data.p_comp_data = p_comp_addr;
 290
 291         rc = qed_sp_init_request(p_hwfn, &p_ent,
 292                                  ISCSI_RAMROD_CMD_ID_OFFLOAD_CONN,
 293                                  PROTOCOLID_ISCSI, &init_data);
 294         if (rc)
 295                 return rc;
 296
 297         p_ramrod = &p_ent->ramrod.iscsi_conn_offload;
 298
 299         /* Transmission PQ is the first of the PF */
 300         memset(&pq_params, 0, sizeof(pq_params));
 301         pq0_id = qed_get_qm_pq(p_hwfn, PROTOCOLID_ISCSI, &pq_params);
 302         p_conn->physical_q0 = cpu_to_le16(pq0_id);
 303         p_ramrod->iscsi.physical_q0 = cpu_to_le16(pq0_id);
 304
 305         /* iSCSI Pure-ACK PQ */
 306         pq_params.iscsi.q_idx = 1;
 307         pq1_id = qed_get_qm_pq(p_hwfn, PROTOCOLID_ISCSI, &pq_params);
 308         p_conn->physical_q1 = cpu_to_le16(pq1_id);
 309         p_ramrod->iscsi.physical_q1 = cpu_to_le16(pq1_id);
 310
 311         p_ramrod->hdr.op_code = ISCSI_RAMROD_CMD_ID_OFFLOAD_CONN;
 312         SET_FIELD(p_ramrod->hdr.flags, ISCSI_SLOW_PATH_HDR_LAYER_CODE,
 313                   p_conn->layer_code);
 314
 315         p_ramrod->conn_id = cpu_to_le16(p_conn->conn_id);
 316         p_ramrod->fw_cid = cpu_to_le32(p_conn->icid);
 317
 318         DMA_REGPAIR_LE(p_ramrod->iscsi.sq_pbl_addr, p_conn->sq_pbl_addr);
 319
 320         r2tq_pbl_addr = qed_chain_get_pbl_phys(&p_conn->r2tq);
 321         DMA_REGPAIR_LE(p_ramrod->iscsi.r2tq_pbl_addr, r2tq_pbl_addr);
 322
 323         xhq_pbl_addr = qed_chain_get_pbl_phys(&p_conn->xhq);
 324         DMA_REGPAIR_LE(p_ramrod->iscsi.xhq_pbl_addr, xhq_pbl_addr);
 325
 326         uhq_pbl_addr = qed_chain_get_pbl_phys(&p_conn->uhq);
 327         DMA_REGPAIR_LE(p_ramrod->iscsi.uhq_pbl_addr, uhq_pbl_addr);
 328
 329         p_ramrod->iscsi.initial_ack = cpu_to_le32(p_conn->initial_ack);
 330         p_ramrod->iscsi.flags = p_conn->offl_flags;
 331         p_ramrod->iscsi.default_cq = p_conn->default_cq;
 332         p_ramrod->iscsi.stat_sn = cpu_to_le32(p_conn->stat_sn);
 333
 334         if (!GET_FIELD(p_ramrod->iscsi.flags,
 335                        ISCSI_CONN_OFFLOAD_PARAMS_TCP_ON_CHIP_1B)) {
 336                 p_tcp = &p_ramrod->tcp;
 337
 338                 p = (u16 *)p_conn->local_mac;
 339                 p_tcp->local_mac_addr_hi = swab16(get_unaligned(p));
 340                 p_tcp->local_mac_addr_mid = swab16(get_unaligned(p + 1));
 341                 p_tcp->local_mac_addr_lo = swab16(get_unaligned(p + 2));
 342
 343                 p = (u16 *)p_conn->remote_mac;
 344                 p_tcp->remote_mac_addr_hi = swab16(get_unaligned(p));
 345                 p_tcp->remote_mac_addr_mid = swab16(get_unaligned(p + 1));
 346                 p_tcp->remote_mac_addr_lo = swab16(get_unaligned(p + 2));
 347
 348                 p_tcp->vlan_id = cpu_to_le16(p_conn->vlan_id);
 349
 350                 p_tcp->flags = p_conn->tcp_flags;
 351                 p_tcp->ip_version = p_conn->ip_version;
 352                 for (i = 0; i < 4; i++) {
 353                         dval = p_conn->remote_ip[i];
 354                         p_tcp->remote_ip[i] = cpu_to_le32(dval);
 355                         dval = p_conn->local_ip[i];
 356                         p_tcp->local_ip[i] = cpu_to_le32(dval);
 357                 }
 358                 p_tcp->ka_max_probe_cnt = p_conn->ka_max_probe_cnt;
 359                 p_tcp->dup_ack_theshold = p_conn->dup_ack_theshold;
 360
 361                 p_tcp->rcv_next = cpu_to_le32(p_conn->rcv_next);
 362                 p_tcp->snd_una = cpu_to_le32(p_conn->snd_una);
 363                 p_tcp->snd_next = cpu_to_le32(p_conn->snd_next);
 364                 p_tcp->snd_max = cpu_to_le32(p_conn->snd_max);
 365                 p_tcp->snd_wnd = cpu_to_le32(p_conn->snd_wnd);
 366                 p_tcp->rcv_wnd = cpu_to_le32(p_conn->rcv_wnd);
 367                 p_tcp->snd_wl1 = cpu_to_le32(p_conn->snd_wl1);
 368                 p_tcp->cwnd = cpu_to_le32(p_conn->cwnd);
 369                 p_tcp->ss_thresh = cpu_to_le32(p_conn->ss_thresh);
 370                 p_tcp->srtt = cpu_to_le16(p_conn->srtt);
 371                 p_tcp->rtt_var = cpu_to_le16(p_conn->rtt_var);
 372                 p_tcp->ts_time = cpu_to_le32(p_conn->ts_time);
 373                 p_tcp->ts_recent = cpu_to_le32(p_conn->ts_recent);
 374                 p_tcp->ts_recent_age = cpu_to_le32(p_conn->ts_recent_age);
 375                 p_tcp->total_rt = cpu_to_le32(p_conn->total_rt);
 376                 dval = p_conn->ka_timeout_delta;
 377                 p_tcp->ka_timeout_delta = cpu_to_le32(dval);
 378                 dval = p_conn->rt_timeout_delta;
 379                 p_tcp->rt_timeout_delta = cpu_to_le32(dval);
 380                 p_tcp->dup_ack_cnt = p_conn->dup_ack_cnt;
 381                 p_tcp->snd_wnd_probe_cnt = p_conn->snd_wnd_probe_cnt;
 382                 p_tcp->ka_probe_cnt = p_conn->ka_probe_cnt;
 383                 p_tcp->rt_cnt = p_conn->rt_cnt;
 384                 p_tcp->flow_label = cpu_to_le32(p_conn->flow_label);
 385                 p_tcp->ka_timeout = cpu_to_le32(p_conn->ka_timeout);
 386                 p_tcp->ka_interval = cpu_to_le32(p_conn->ka_interval);
 387                 p_tcp->max_rt_time = cpu_to_le32(p_conn->max_rt_time);
 388                 dval = p_conn->initial_rcv_wnd;
 389                 p_tcp->initial_rcv_wnd = cpu_to_le32(dval);
 390                 p_tcp->ttl = p_conn->ttl;
 391                 p_tcp->tos_or_tc = p_conn->tos_or_tc;
 392                 p_tcp->remote_port = cpu_to_le16(p_conn->remote_port);
 393                 p_tcp->local_port = cpu_to_le16(p_conn->local_port);
 394                 p_tcp->mss = cpu_to_le16(p_conn->mss);
 395                 p_tcp->snd_wnd_scale = p_conn->snd_wnd_scale;
 396                 p_tcp->rcv_wnd_scale = p_conn->rcv_wnd_scale;
 397                 dval = p_conn->ts_ticks_per_second;
 398                 p_tcp->ts_ticks_per_second = cpu_to_le32(dval);
 399                 wval = p_conn->da_timeout_value;
 400                 p_tcp->da_timeout_value = cpu_to_le16(wval);
 401                 p_tcp->ack_frequency = p_conn->ack_frequency;
 402                 p_tcp->connect_mode = p_conn->connect_mode;
 403         } else {
 404                 p_tcp2 =
 405                     &((struct iscsi_spe_conn_offload_option2 *)p_ramrod)->tcp;
 406
 407                 p = (u16 *)p_conn->local_mac;
 408                 p_tcp2->local_mac_addr_hi = swab16(get_unaligned(p));
 409                 p_tcp2->local_mac_addr_mid = swab16(get_unaligned(p + 1));
 410                 p_tcp2->local_mac_addr_lo = swab16(get_unaligned(p + 2));
 411
 412                 p = (u16 *)p_conn->remote_mac;
 413                 p_tcp2->remote_mac_addr_hi = swab16(get_unaligned(p));
 414                 p_tcp2->remote_mac_addr_mid = swab16(get_unaligned(p + 1));
 415                 p_tcp2->remote_mac_addr_lo = swab16(get_unaligned(p + 2));
 416
 417                 p_tcp2->vlan_id = cpu_to_le16(p_conn->vlan_id);
 418                 p_tcp2->flags = p_conn->tcp_flags;
 419
 420                 p_tcp2->ip_version = p_conn->ip_version;
 421                 for (i = 0; i < 4; i++) {
 422                         dval = p_conn->remote_ip[i];
 423                         p_tcp2->remote_ip[i] = cpu_to_le32(dval);
 424                         dval = p_conn->local_ip[i];
 425                         p_tcp2->local_ip[i] = cpu_to_le32(dval);
 426                 }
 427
 428                 p_tcp2->flow_label = cpu_to_le32(p_conn->flow_label);
 429                 p_tcp2->ttl = p_conn->ttl;
 430                 p_tcp2->tos_or_tc = p_conn->tos_or_tc;
 431                 p_tcp2->remote_port = cpu_to_le16(p_conn->remote_port);
 432                 p_tcp2->local_port = cpu_to_le16(p_conn->local_port);
 433                 p_tcp2->mss = cpu_to_le16(p_conn->mss);
 434                 p_tcp2->rcv_wnd_scale = p_conn->rcv_wnd_scale;
 435                 p_tcp2->connect_mode = p_conn->connect_mode;
 436                 wval = p_conn->syn_ip_payload_length;
 437                 p_tcp2->syn_ip_payload_length = cpu_to_le16(wval);
 438                 p_tcp2->syn_phy_addr_lo = DMA_LO_LE(p_conn->syn_phy_addr);
 439                 p_tcp2->syn_phy_addr_hi = DMA_HI_LE(p_conn->syn_phy_addr);
 440         }
 441
 442         return qed_spq_post(p_hwfn, p_ent, NULL);
 443 }
 444
 445 static int qed_sp_iscsi_conn_update(struct qed_hwfn *p_hwfn,
 446                                     struct qed_iscsi_conn *p_conn,
 447                                     enum spq_mode comp_mode,
 448                                     struct qed_spq_comp_cb *p_comp_addr)
 449 {
 450         struct iscsi_conn_update_ramrod_params *p_ramrod = NULL;
 451         struct qed_spq_entry *p_ent = NULL;
 452         struct qed_sp_init_data init_data;
 453         int rc = -EINVAL;
 454         u32 dval;
 455
 456         /* Get SPQ entry */
 457         memset(&init_data, 0, sizeof(init_data));
 458         init_data.cid = p_conn->icid;
 459         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 460         init_data.comp_mode = comp_mode;
 461         init_data.p_comp_data = p_comp_addr;
 462
 463         rc = qed_sp_init_request(p_hwfn, &p_ent,
 464                                  ISCSI_RAMROD_CMD_ID_UPDATE_CONN,
 465                                  PROTOCOLID_ISCSI, &init_data);
 466         if (rc)
 467                 return rc;
 468
 469         p_ramrod = &p_ent->ramrod.iscsi_conn_update;
 470         p_ramrod->hdr.op_code = ISCSI_RAMROD_CMD_ID_UPDATE_CONN;
 471         SET_FIELD(p_ramrod->hdr.flags,
 472                   ISCSI_SLOW_PATH_HDR_LAYER_CODE, p_conn->layer_code);
 473
 474         p_ramrod->conn_id = cpu_to_le16(p_conn->conn_id);
 475         p_ramrod->fw_cid = cpu_to_le32(p_conn->icid);
 476         p_ramrod->flags = p_conn->update_flag;
 477         p_ramrod->max_seq_size = cpu_to_le32(p_conn->max_seq_size);
 478         dval = p_conn->max_recv_pdu_length;
 479         p_ramrod->max_recv_pdu_length = cpu_to_le32(dval);
 480         dval = p_conn->max_send_pdu_length;
 481         p_ramrod->max_send_pdu_length = cpu_to_le32(dval);
 482         dval = p_conn->first_seq_length;
 483         p_ramrod->first_seq_length = cpu_to_le32(dval);
 484         p_ramrod->exp_stat_sn = cpu_to_le32(p_conn->exp_stat_sn);
 485
 486         return qed_spq_post(p_hwfn, p_ent, NULL);
 487 }
 488
 489 static int qed_sp_iscsi_conn_terminate(struct qed_hwfn *p_hwfn,
 490                                        struct qed_iscsi_conn *p_conn,
 491                                        enum spq_mode comp_mode,
 492                                        struct qed_spq_comp_cb *p_comp_addr)
 493 {
 494         struct iscsi_spe_conn_termination *p_ramrod = NULL;
 495         struct qed_spq_entry *p_ent = NULL;
 496         struct qed_sp_init_data init_data;
 497         int rc = -EINVAL;
 498
 499         /* Get SPQ entry */
 500         memset(&init_data, 0, sizeof(init_data));
 501         init_data.cid = p_conn->icid;
 502         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 503         init_data.comp_mode = comp_mode;
 504         init_data.p_comp_data = p_comp_addr;
 505
 506         rc = qed_sp_init_request(p_hwfn, &p_ent,
 507                                  ISCSI_RAMROD_CMD_ID_TERMINATION_CONN,
 508                                  PROTOCOLID_ISCSI, &init_data);
 509         if (rc)
 510                 return rc;
 511
 512         p_ramrod = &p_ent->ramrod.iscsi_conn_terminate;
 513         p_ramrod->hdr.op_code = ISCSI_RAMROD_CMD_ID_TERMINATION_CONN;
 514         SET_FIELD(p_ramrod->hdr.flags,
 515                   ISCSI_SLOW_PATH_HDR_LAYER_CODE, p_conn->layer_code);
 516
 517         p_ramrod->conn_id = cpu_to_le16(p_conn->conn_id);
 518         p_ramrod->fw_cid = cpu_to_le32(p_conn->icid);
 519         p_ramrod->abortive = p_conn->abortive_dsconnect;
 520
 521         DMA_REGPAIR_LE(p_ramrod->query_params_addr,
 522                        p_conn->tcp_upload_params_phys_addr);
 523         DMA_REGPAIR_LE(p_ramrod->queue_cnts_addr, p_conn->queue_cnts_phys_addr);
 524
 525         return qed_spq_post(p_hwfn, p_ent, NULL);
 526 }
 527
 528 static int qed_sp_iscsi_conn_clear_sq(struct qed_hwfn *p_hwfn,
 529                                       struct qed_iscsi_conn *p_conn,
 530                                       enum spq_mode comp_mode,
 531                                       struct qed_spq_comp_cb *p_comp_addr)
 532 {
 533         struct iscsi_slow_path_hdr *p_ramrod = NULL;
 534         struct qed_spq_entry *p_ent = NULL;
 535         struct qed_sp_init_data init_data;
 536         int rc = -EINVAL;
 537
 538         /* Get SPQ entry */
 539         memset(&init_data, 0, sizeof(init_data));
 540         init_data.cid = p_conn->icid;
 541         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 542         init_data.comp_mode = comp_mode;
 543         init_data.p_comp_data = p_comp_addr;
 544
 545         rc = qed_sp_init_request(p_hwfn, &p_ent,
 546                                  ISCSI_RAMROD_CMD_ID_CLEAR_SQ,
 547                                  PROTOCOLID_ISCSI, &init_data);
 548         if (rc)
 549                 return rc;
 550
 551         p_ramrod = &p_ent->ramrod.iscsi_empty;
 552         p_ramrod->op_code = ISCSI_RAMROD_CMD_ID_CLEAR_SQ;
 553         SET_FIELD(p_ramrod->flags,
 554                   ISCSI_SLOW_PATH_HDR_LAYER_CODE, p_conn->layer_code);
 555
 556         return qed_spq_post(p_hwfn, p_ent, NULL);
 557 }
 558
 559 static int qed_sp_iscsi_func_stop(struct qed_hwfn *p_hwfn,
 560                                   enum spq_mode comp_mode,
 561                                   struct qed_spq_comp_cb *p_comp_addr)
 562 {
 563         struct iscsi_spe_func_dstry *p_ramrod = NULL;
 564         struct qed_spq_entry *p_ent = NULL;
 565         struct qed_sp_init_data init_data;
 566         int rc = 0;
 567
 568         /* Get SPQ entry */
 569         memset(&init_data, 0, sizeof(init_data));
 570         init_data.cid = qed_spq_get_cid(p_hwfn);
 571         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 572         init_data.comp_mode = comp_mode;
 573         init_data.p_comp_data = p_comp_addr;
 574
 575         rc = qed_sp_init_request(p_hwfn, &p_ent,
 576                                  ISCSI_RAMROD_CMD_ID_DESTROY_FUNC,
 577                                  PROTOCOLID_ISCSI, &init_data);
 578         if (rc)
 579                 return rc;
 580
 581         p_ramrod = &p_ent->ramrod.iscsi_destroy;
 582         p_ramrod->hdr.op_code = ISCSI_RAMROD_CMD_ID_DESTROY_FUNC;
 583
 584         return qed_spq_post(p_hwfn, p_ent, NULL);
 585 }
 586
 587 static void __iomem *qed_iscsi_get_db_addr(struct qed_hwfn *p_hwfn, u32 cid)
 588 {
 589         return (u8 __iomem *)p_hwfn->doorbells +
 590                              qed_db_addr(cid, DQ_DEMS_LEGACY);
 591 }
 592
 593 static void __iomem *qed_iscsi_get_primary_bdq_prod(struct qed_hwfn *p_hwfn,
 594                                                     u8 bdq_id)
 595 {
 596         u8 bdq_function_id = ISCSI_BDQ_ID(p_hwfn->port_id);
 597
 598         return (u8 __iomem *)p_hwfn->regview + GTT_BAR0_MAP_REG_MSDM_RAM +
 599                              MSTORM_SCSI_BDQ_EXT_PROD_OFFSET(bdq_function_id,
 600                                                              bdq_id);
 601 }
 602
 603 static void __iomem *qed_iscsi_get_secondary_bdq_prod(struct qed_hwfn *p_hwfn,
 604                                                       u8 bdq_id)
 605 {
 606         u8 bdq_function_id = ISCSI_BDQ_ID(p_hwfn->port_id);
 607
 608         return (u8 __iomem *)p_hwfn->regview + GTT_BAR0_MAP_REG_TSDM_RAM +
 609                              TSTORM_SCSI_BDQ_EXT_PROD_OFFSET(bdq_function_id,
 610                                                              bdq_id);
 611 }
 612
 613 static int qed_iscsi_setup_connection(struct qed_hwfn *p_hwfn,
 614                                       struct qed_iscsi_conn *p_conn)
 615 {
 616         if (!p_conn->queue_cnts_virt_addr)
 617                 goto nomem;
 618         memset(p_conn->queue_cnts_virt_addr, 0,
 619                sizeof(*p_conn->queue_cnts_virt_addr));
 620
 621         if (!p_conn->tcp_upload_params_virt_addr)
 622                 goto nomem;
 623         memset(p_conn->tcp_upload_params_virt_addr, 0,
 624                sizeof(*p_conn->tcp_upload_params_virt_addr));
 625
 626         if (!p_conn->r2tq.p_virt_addr)
 627                 goto nomem;
 628         qed_chain_pbl_zero_mem(&p_conn->r2tq);
 629
 630         if (!p_conn->uhq.p_virt_addr)
 631                 goto nomem;
 632         qed_chain_pbl_zero_mem(&p_conn->uhq);
 633
 634         if (!p_conn->xhq.p_virt_addr)
 635                 goto nomem;
 636         qed_chain_pbl_zero_mem(&p_conn->xhq);
 637
 638         return 0;
 639 nomem:
 640         return -ENOMEM;
 641 }
 642
 643 static int qed_iscsi_allocate_connection(struct qed_hwfn *p_hwfn,
 644                                          struct qed_iscsi_conn **p_out_conn)
 645 {
 646         u16 uhq_num_elements = 0, xhq_num_elements = 0, r2tq_num_elements = 0;
 647         struct scsi_terminate_extra_params *p_q_cnts = NULL;
 648         struct qed_iscsi_pf_params *p_params = NULL;
 649         struct tcp_upload_params *p_tcp = NULL;
 650         struct qed_iscsi_conn *p_conn = NULL;
 651         int rc = 0;
 652
 653         /* Try finding a free connection that can be used */
 654         spin_lock_bh(&p_hwfn->p_iscsi_info->lock);
 655         if (!list_empty(&p_hwfn->p_iscsi_info->free_list))
 656                 p_conn = list_first_entry(&p_hwfn->p_iscsi_info->free_list,
 657                                           struct qed_iscsi_conn, list_entry);
 658         if (p_conn) {
 659                 list_del(&p_conn->list_entry);
 660                 spin_unlock_bh(&p_hwfn->p_iscsi_info->lock);
 661                 *p_out_conn = p_conn;
 662                 return 0;
 663         }
 664         spin_unlock_bh(&p_hwfn->p_iscsi_info->lock);
 665
 666         /* Need to allocate a new connection */
 667         p_params = &p_hwfn->pf_params.iscsi_pf_params;
 668
 669         p_conn = kzalloc(sizeof(*p_conn), GFP_KERNEL);
 670         if (!p_conn)
 671                 return -ENOMEM;
 672
 673         p_q_cnts = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
 674                                       sizeof(*p_q_cnts),
 675                                       &p_conn->queue_cnts_phys_addr,
 676                                       GFP_KERNEL);
 677         if (!p_q_cnts)
 678                 goto nomem_queue_cnts_param;
 679         p_conn->queue_cnts_virt_addr = p_q_cnts;
 680
 681         p_tcp = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
 682                                    sizeof(*p_tcp),
 683                                    &p_conn->tcp_upload_params_phys_addr,
 684                                    GFP_KERNEL);
 685         if (!p_tcp)
 686                 goto nomem_upload_param;
 687         p_conn->tcp_upload_params_virt_addr = p_tcp;
 688
 689         r2tq_num_elements = p_params->num_r2tq_pages_in_ring *
 690                             QED_CHAIN_PAGE_SIZE / 0x80;
 691         rc = qed_chain_alloc(p_hwfn->cdev,
 692                              QED_CHAIN_USE_TO_CONSUME_PRODUCE,
 693                              QED_CHAIN_MODE_PBL,
 694                              QED_CHAIN_CNT_TYPE_U16,
 695                              r2tq_num_elements, 0x80, &p_conn->r2tq);
 696         if (rc)
 697                 goto nomem_r2tq;
 698
 699         uhq_num_elements = p_params->num_uhq_pages_in_ring *
 700                            QED_CHAIN_PAGE_SIZE / sizeof(struct iscsi_uhqe);
 701         rc = qed_chain_alloc(p_hwfn->cdev,
 702                              QED_CHAIN_USE_TO_CONSUME_PRODUCE,
 703                              QED_CHAIN_MODE_PBL,
 704                              QED_CHAIN_CNT_TYPE_U16,
 705                              uhq_num_elements,
 706                              sizeof(struct iscsi_uhqe), &p_conn->uhq);
 707         if (rc)
 708                 goto nomem_uhq;
 709
 710         xhq_num_elements = uhq_num_elements;
 711         rc = qed_chain_alloc(p_hwfn->cdev,
 712                              QED_CHAIN_USE_TO_CONSUME_PRODUCE,
 713                              QED_CHAIN_MODE_PBL,
 714                              QED_CHAIN_CNT_TYPE_U16,
 715                              xhq_num_elements,
 716                              sizeof(struct iscsi_xhqe), &p_conn->xhq);
 717         if (rc)
 718                 goto nomem;
 719
 720         p_conn->free_on_delete = true;
 721         *p_out_conn = p_conn;
 722         return 0;
 723
 724 nomem:
 725         qed_chain_free(p_hwfn->cdev, &p_conn->uhq);
 726 nomem_uhq:
 727         qed_chain_free(p_hwfn->cdev, &p_conn->r2tq);
 728 nomem_r2tq:
 729         dma_free_coherent(&p_hwfn->cdev->pdev->dev,
 730                           sizeof(struct tcp_upload_params),
 731                           p_conn->tcp_upload_params_virt_addr,
 732                           p_conn->tcp_upload_params_phys_addr);
 733 nomem_upload_param:
 734         dma_free_coherent(&p_hwfn->cdev->pdev->dev,
 735                           sizeof(struct scsi_terminate_extra_params),
 736                           p_conn->queue_cnts_virt_addr,
 737                           p_conn->queue_cnts_phys_addr);
 738 nomem_queue_cnts_param:
 739         kfree(p_conn);
 740
 741         return -ENOMEM;
 742 }
 743
 744 static int qed_iscsi_acquire_connection(struct qed_hwfn *p_hwfn,
 745                                         struct qed_iscsi_conn *p_in_conn,
 746                                         struct qed_iscsi_conn **p_out_conn)
 747 {
 748         struct qed_iscsi_conn *p_conn = NULL;
 749         int rc = 0;
 750         u32 icid;
 751
 752         spin_lock_bh(&p_hwfn->p_iscsi_info->lock);
 753         rc = qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_ISCSI, &icid);
 754         spin_unlock_bh(&p_hwfn->p_iscsi_info->lock);
 755         if (rc)
 756                 return rc;
 757
 758         /* Use input connection or allocate a new one */
 759         if (p_in_conn)
 760                 p_conn = p_in_conn;
 761         else
 762                 rc = qed_iscsi_allocate_connection(p_hwfn, &p_conn);
 763
 764         if (!rc)
 765                 rc = qed_iscsi_setup_connection(p_hwfn, p_conn);
 766
 767         if (rc) {
 768                 spin_lock_bh(&p_hwfn->p_iscsi_info->lock);
 769                 qed_cxt_release_cid(p_hwfn, icid);
 770                 spin_unlock_bh(&p_hwfn->p_iscsi_info->lock);
 771                 return rc;
 772         }
 773
 774         p_conn->icid = icid;
 775         p_conn->conn_id = (u16)icid;
 776         p_conn->fw_cid = (p_hwfn->hw_info.opaque_fid << 16) | icid;
 777
 778         *p_out_conn = p_conn;
 779
 780         return rc;
 781 }
 782
 783 static void qed_iscsi_release_connection(struct qed_hwfn *p_hwfn,
 784                                          struct qed_iscsi_conn *p_conn)
 785 {
 786         spin_lock_bh(&p_hwfn->p_iscsi_info->lock);
 787         list_add_tail(&p_conn->list_entry, &p_hwfn->p_iscsi_info->free_list);
 788         qed_cxt_release_cid(p_hwfn, p_conn->icid);
 789         spin_unlock_bh(&p_hwfn->p_iscsi_info->lock);
 790 }
 791
 792 void qed_iscsi_free_connection(struct qed_hwfn *p_hwfn,
 793                                struct qed_iscsi_conn *p_conn)
 794 {
 795         qed_chain_free(p_hwfn->cdev, &p_conn->xhq);
 796         qed_chain_free(p_hwfn->cdev, &p_conn->uhq);
 797         qed_chain_free(p_hwfn->cdev, &p_conn->r2tq);
 798         dma_free_coherent(&p_hwfn->cdev->pdev->dev,
 799                           sizeof(struct tcp_upload_params),
 800                           p_conn->tcp_upload_params_virt_addr,
 801                           p_conn->tcp_upload_params_phys_addr);
 802         dma_free_coherent(&p_hwfn->cdev->pdev->dev,
 803                           sizeof(struct scsi_terminate_extra_params),
 804                           p_conn->queue_cnts_virt_addr,
 805                           p_conn->queue_cnts_phys_addr);
 806         kfree(p_conn);
 807 }
 808
 809 struct qed_iscsi_info *qed_iscsi_alloc(struct qed_hwfn *p_hwfn)
 810 {
 811         struct qed_iscsi_info *p_iscsi_info;
 812
 813         p_iscsi_info = kzalloc(sizeof(*p_iscsi_info), GFP_KERNEL);
 814         if (!p_iscsi_info)
 815                 return NULL;
 816
 817         INIT_LIST_HEAD(&p_iscsi_info->free_list);
 818         return p_iscsi_info;
 819 }
 820
 821 void qed_iscsi_setup(struct qed_hwfn *p_hwfn,
 822                      struct qed_iscsi_info *p_iscsi_info)
 823 {
 824         spin_lock_init(&p_iscsi_info->lock);
 825 }
 826
 827 void qed_iscsi_free(struct qed_hwfn *p_hwfn,
 828                     struct qed_iscsi_info *p_iscsi_info)
 829 {
 830         struct qed_iscsi_conn *p_conn = NULL;
 831
 832         while (!list_empty(&p_hwfn->p_iscsi_info->free_list)) {
 833                 p_conn = list_first_entry(&p_hwfn->p_iscsi_info->free_list,
 834                                           struct qed_iscsi_conn, list_entry);
 835                 if (p_conn) {
 836                         list_del(&p_conn->list_entry);
 837                         qed_iscsi_free_connection(p_hwfn, p_conn);
 838                 }
 839         }
 840
 841         kfree(p_iscsi_info);
 842 }
 843
 844 static void _qed_iscsi_get_tstats(struct qed_hwfn *p_hwfn,
 845                                   struct qed_ptt *p_ptt,
 846                                   struct qed_iscsi_stats *p_stats)
 847 {
 848         struct tstorm_iscsi_stats_drv tstats;
 849         u32 tstats_addr;
 850
 851         memset(&tstats, 0, sizeof(tstats));
 852         tstats_addr = BAR0_MAP_REG_TSDM_RAM +
 853                       TSTORM_ISCSI_RX_STATS_OFFSET(p_hwfn->rel_pf_id);
 854         qed_memcpy_from(p_hwfn, p_ptt, &tstats, tstats_addr, sizeof(tstats));
 855
 856         p_stats->iscsi_rx_bytes_cnt =
 857             HILO_64_REGPAIR(tstats.iscsi_rx_bytes_cnt);
 858         p_stats->iscsi_rx_packet_cnt =
 859             HILO_64_REGPAIR(tstats.iscsi_rx_packet_cnt);
 860         p_stats->iscsi_cmdq_threshold_cnt =
 861             le32_to_cpu(tstats.iscsi_cmdq_threshold_cnt);
 862         p_stats->iscsi_rq_threshold_cnt =
 863             le32_to_cpu(tstats.iscsi_rq_threshold_cnt);
 864         p_stats->iscsi_immq_threshold_cnt =
 865             le32_to_cpu(tstats.iscsi_immq_threshold_cnt);
 866 }
 867
 868 static void _qed_iscsi_get_mstats(struct qed_hwfn *p_hwfn,
 869                                   struct qed_ptt *p_ptt,
 870                                   struct qed_iscsi_stats *p_stats)
 871 {
 872         struct mstorm_iscsi_stats_drv mstats;
 873         u32 mstats_addr;
 874
 875         memset(&mstats, 0, sizeof(mstats));
 876         mstats_addr = BAR0_MAP_REG_MSDM_RAM +
 877                       MSTORM_ISCSI_RX_STATS_OFFSET(p_hwfn->rel_pf_id);
 878         qed_memcpy_from(p_hwfn, p_ptt, &mstats, mstats_addr, sizeof(mstats));
 879
 880         p_stats->iscsi_rx_dropped_pdus_task_not_valid =
 881             HILO_64_REGPAIR(mstats.iscsi_rx_dropped_pdus_task_not_valid);
 882 }
 883
 884 static void _qed_iscsi_get_ustats(struct qed_hwfn *p_hwfn,
 885                                   struct qed_ptt *p_ptt,
 886                                   struct qed_iscsi_stats *p_stats)
 887 {
 888         struct ustorm_iscsi_stats_drv ustats;
 889         u32 ustats_addr;
 890
 891         memset(&ustats, 0, sizeof(ustats));
 892         ustats_addr = BAR0_MAP_REG_USDM_RAM +
 893                       USTORM_ISCSI_RX_STATS_OFFSET(p_hwfn->rel_pf_id);
 894         qed_memcpy_from(p_hwfn, p_ptt, &ustats, ustats_addr, sizeof(ustats));
 895
 896         p_stats->iscsi_rx_data_pdu_cnt =
 897             HILO_64_REGPAIR(ustats.iscsi_rx_data_pdu_cnt);
 898         p_stats->iscsi_rx_r2t_pdu_cnt =
 899             HILO_64_REGPAIR(ustats.iscsi_rx_r2t_pdu_cnt);
 900         p_stats->iscsi_rx_total_pdu_cnt =
 901             HILO_64_REGPAIR(ustats.iscsi_rx_total_pdu_cnt);
 902 }
 903
 904 static void _qed_iscsi_get_xstats(struct qed_hwfn *p_hwfn,
 905                                   struct qed_ptt *p_ptt,
 906                                   struct qed_iscsi_stats *p_stats)
 907 {
 908         struct xstorm_iscsi_stats_drv xstats;
 909         u32 xstats_addr;
 910
 911         memset(&xstats, 0, sizeof(xstats));
 912         xstats_addr = BAR0_MAP_REG_XSDM_RAM +
 913                       XSTORM_ISCSI_TX_STATS_OFFSET(p_hwfn->rel_pf_id);
 914         qed_memcpy_from(p_hwfn, p_ptt, &xstats, xstats_addr, sizeof(xstats));
 915
 916         p_stats->iscsi_tx_go_to_slow_start_event_cnt =
 917             HILO_64_REGPAIR(xstats.iscsi_tx_go_to_slow_start_event_cnt);
 918         p_stats->iscsi_tx_fast_retransmit_event_cnt =
 919             HILO_64_REGPAIR(xstats.iscsi_tx_fast_retransmit_event_cnt);
 920 }
 921
 922 static void _qed_iscsi_get_ystats(struct qed_hwfn *p_hwfn,
 923                                   struct qed_ptt *p_ptt,
 924                                   struct qed_iscsi_stats *p_stats)
 925 {
 926         struct ystorm_iscsi_stats_drv ystats;
 927         u32 ystats_addr;
 928
 929         memset(&ystats, 0, sizeof(ystats));
 930         ystats_addr = BAR0_MAP_REG_YSDM_RAM +
 931                       YSTORM_ISCSI_TX_STATS_OFFSET(p_hwfn->rel_pf_id);
 932         qed_memcpy_from(p_hwfn, p_ptt, &ystats, ystats_addr, sizeof(ystats));
 933
 934         p_stats->iscsi_tx_data_pdu_cnt =
 935             HILO_64_REGPAIR(ystats.iscsi_tx_data_pdu_cnt);
 936         p_stats->iscsi_tx_r2t_pdu_cnt =
 937             HILO_64_REGPAIR(ystats.iscsi_tx_r2t_pdu_cnt);
 938         p_stats->iscsi_tx_total_pdu_cnt =
 939             HILO_64_REGPAIR(ystats.iscsi_tx_total_pdu_cnt);
 940 }
 941
 942 static void _qed_iscsi_get_pstats(struct qed_hwfn *p_hwfn,
 943                                   struct qed_ptt *p_ptt,
 944                                   struct qed_iscsi_stats *p_stats)
 945 {
 946         struct pstorm_iscsi_stats_drv pstats;
 947         u32 pstats_addr;
 948
 949         memset(&pstats, 0, sizeof(pstats));
 950         pstats_addr = BAR0_MAP_REG_PSDM_RAM +
 951                       PSTORM_ISCSI_TX_STATS_OFFSET(p_hwfn->rel_pf_id);
 952         qed_memcpy_from(p_hwfn, p_ptt, &pstats, pstats_addr, sizeof(pstats));
 953
 954         p_stats->iscsi_tx_bytes_cnt =
 955             HILO_64_REGPAIR(pstats.iscsi_tx_bytes_cnt);
 956         p_stats->iscsi_tx_packet_cnt =
 957             HILO_64_REGPAIR(pstats.iscsi_tx_packet_cnt);
 958 }
 959
 960 static int qed_iscsi_get_stats(struct qed_hwfn *p_hwfn,
 961                                struct qed_iscsi_stats *stats)
 962 {
 963         struct qed_ptt *p_ptt;
 964
 965         memset(stats, 0, sizeof(*stats));
 966
 967         p_ptt = qed_ptt_acquire(p_hwfn);
 968         if (!p_ptt) {
 969                 DP_ERR(p_hwfn, "Failed to acquire ptt\n");
 970                 return -EAGAIN;
 971         }
 972
 973         _qed_iscsi_get_tstats(p_hwfn, p_ptt, stats);
 974         _qed_iscsi_get_mstats(p_hwfn, p_ptt, stats);
 975         _qed_iscsi_get_ustats(p_hwfn, p_ptt, stats);
 976
 977         _qed_iscsi_get_xstats(p_hwfn, p_ptt, stats);
 978         _qed_iscsi_get_ystats(p_hwfn, p_ptt, stats);
 979         _qed_iscsi_get_pstats(p_hwfn, p_ptt, stats);
 980
 981         qed_ptt_release(p_hwfn, p_ptt);
 982
 983         return 0;
 984 }
 985
 986 struct qed_hash_iscsi_con {
 987         struct hlist_node node;
 988         struct qed_iscsi_conn *con;
 989 };
 990
 991 static int qed_fill_iscsi_dev_info(struct qed_dev *cdev,
 992                                    struct qed_dev_iscsi_info *info)
 993 {
 994         struct qed_hwfn *hwfn = QED_LEADING_HWFN(cdev);
 995
 996         int rc;
 997
 998         memset(info, 0, sizeof(*info));
 999         rc = qed_fill_dev_info(cdev, &info->common);
1000
1001         info->primary_dbq_rq_addr =
1002             qed_iscsi_get_primary_bdq_prod(hwfn, BDQ_ID_RQ);
1003         info->secondary_bdq_rq_addr =
1004             qed_iscsi_get_secondary_bdq_prod(hwfn, BDQ_ID_RQ);
1005
1006         return rc;
1007 }
1008
1009 static void qed_register_iscsi_ops(struct qed_dev *cdev,
1010                                    struct qed_iscsi_cb_ops *ops, void *cookie)
1011 {
1012         cdev->protocol_ops.iscsi = ops;
1013         cdev->ops_cookie = cookie;
1014 }
1015
1016 static struct qed_hash_iscsi_con *qed_iscsi_get_hash(struct qed_dev *cdev,
1017                                                      u32 handle)
1018 {
1019         struct qed_hash_iscsi_con *hash_con = NULL;
1020
1021         if (!(cdev->flags & QED_FLAG_STORAGE_STARTED))
1022                 return NULL;
1023
1024         hash_for_each_possible(cdev->connections, hash_con, node, handle) {
1025                 if (hash_con->con->icid == handle)
1026                         break;
1027         }
1028
1029         if (!hash_con || (hash_con->con->icid != handle))
1030                 return NULL;
1031
1032         return hash_con;
1033 }
1034
1035 static int qed_iscsi_stop(struct qed_dev *cdev)
1036 {
1037         int rc;
1038
1039         if (!(cdev->flags & QED_FLAG_STORAGE_STARTED)) {
1040                 DP_NOTICE(cdev, "iscsi already stopped\n");
1041                 return 0;
1042         }
1043
1044         if (!hash_empty(cdev->connections)) {
1045                 DP_NOTICE(cdev,
1046                           "Can't stop iscsi - not all connections were returned\n");
1047                 return -EINVAL;
1048         }
1049
1050         /* Stop the iscsi */
1051         rc = qed_sp_iscsi_func_stop(QED_LEADING_HWFN(cdev),
1052                                     QED_SPQ_MODE_EBLOCK, NULL);
1053         cdev->flags &= ~QED_FLAG_STORAGE_STARTED;
1054
1055         return rc;
1056 }
1057
1058 static int qed_iscsi_start(struct qed_dev *cdev,
1059                            struct qed_iscsi_tid *tasks,
1060                            void *event_context,
1061                            iscsi_event_cb_t async_event_cb)
1062 {
1063         int rc;
1064         struct qed_tid_mem *tid_info;
1065
1066         if (cdev->flags & QED_FLAG_STORAGE_STARTED) {
1067                 DP_NOTICE(cdev, "iscsi already started;\n");
1068                 return 0;
1069         }
1070
1071         rc = qed_sp_iscsi_func_start(QED_LEADING_HWFN(cdev),
1072                                      QED_SPQ_MODE_EBLOCK, NULL, event_context,
1073                                      async_event_cb);
1074         if (rc) {
1075                 DP_NOTICE(cdev, "Failed to start iscsi\n");
1076                 return rc;
1077         }
1078
1079         cdev->flags |= QED_FLAG_STORAGE_STARTED;
1080         hash_init(cdev->connections);
1081
1082         if (!tasks)
1083                 return 0;
1084
1085         tid_info = kzalloc(sizeof(*tid_info), GFP_KERNEL);
1086
1087         if (!tid_info) {
1088                 qed_iscsi_stop(cdev);
1089                 return -ENOMEM;
1090         }
1091
1092         rc = qed_cxt_get_tid_mem_info(QED_LEADING_HWFN(cdev),
1093                                       tid_info);
1094         if (rc) {
1095                 DP_NOTICE(cdev, "Failed to gather task information\n");
1096                 qed_iscsi_stop(cdev);
1097                 kfree(tid_info);
1098                 return rc;
1099         }
1100
1101         /* Fill task information */
1102         tasks->size = tid_info->tid_size;
1103         tasks->num_tids_per_block = tid_info->num_tids_per_block;
1104         memcpy(tasks->blocks, tid_info->blocks,
1105                MAX_TID_BLOCKS_ISCSI * sizeof(u8 *));
1106
1107         kfree(tid_info);
1108
1109         return 0;
1110 }
1111
1112 static int qed_iscsi_acquire_conn(struct qed_dev *cdev,
1113                                   u32 *handle,
1114                                   u32 *fw_cid, void __iomem **p_doorbell)
1115 {
1116         struct qed_hash_iscsi_con *hash_con;
1117         int rc;
1118
1119         /* Allocate a hashed connection */
1120         hash_con = kzalloc(sizeof(*hash_con), GFP_ATOMIC);
1121         if (!hash_con)
1122                 return -ENOMEM;
1123
1124         /* Acquire the connection */
1125         rc = qed_iscsi_acquire_connection(QED_LEADING_HWFN(cdev), NULL,
1126                                           &hash_con->con);
1127         if (rc) {
1128                 DP_NOTICE(cdev, "Failed to acquire Connection\n");
1129                 kfree(hash_con);
1130                 return rc;
1131         }
1132
1133         /* Added the connection to hash table */
1134         *handle = hash_con->con->icid;
1135         *fw_cid = hash_con->con->fw_cid;
1136         hash_add(cdev->connections, &hash_con->node, *handle);
1137
1138         if (p_doorbell)
1139                 *p_doorbell = qed_iscsi_get_db_addr(QED_LEADING_HWFN(cdev),
1140                                                     *handle);
1141
1142         return 0;
1143 }
1144
1145 static int qed_iscsi_release_conn(struct qed_dev *cdev, u32 handle)
1146 {
1147         struct qed_hash_iscsi_con *hash_con;
1148
1149         hash_con = qed_iscsi_get_hash(cdev, handle);
1150         if (!hash_con) {
1151                 DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
1152                           handle);
1153                 return -EINVAL;
1154         }
1155
1156         hlist_del(&hash_con->node);
1157         qed_iscsi_release_connection(QED_LEADING_HWFN(cdev), hash_con->con);
1158         kfree(hash_con);
1159
1160         return 0;
1161 }
1162
1163 static int qed_iscsi_offload_conn(struct qed_dev *cdev,
1164                                   u32 handle,
1165                                   struct qed_iscsi_params_offload *conn_info)
1166 {
1167         struct qed_hash_iscsi_con *hash_con;
1168         struct qed_iscsi_conn *con;
1169
1170         hash_con = qed_iscsi_get_hash(cdev, handle);
1171         if (!hash_con) {
1172                 DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
1173                           handle);
1174                 return -EINVAL;
1175         }
1176
1177         /* Update the connection with information from the params */
1178         con = hash_con->con;
1179
1180         ether_addr_copy(con->local_mac, conn_info->src.mac);
1181         ether_addr_copy(con->remote_mac, conn_info->dst.mac);
1182         memcpy(con->local_ip, conn_info->src.ip, sizeof(con->local_ip));
1183         memcpy(con->remote_ip, conn_info->dst.ip, sizeof(con->remote_ip));
1184         con->local_port = conn_info->src.port;
1185         con->remote_port = conn_info->dst.port;
1186
1187         con->layer_code = conn_info->layer_code;
1188         con->sq_pbl_addr = conn_info->sq_pbl_addr;
1189         con->initial_ack = conn_info->initial_ack;
1190         con->vlan_id = conn_info->vlan_id;
1191         con->tcp_flags = conn_info->tcp_flags;
1192         con->ip_version = conn_info->ip_version;
1193         con->default_cq = conn_info->default_cq;
1194         con->ka_max_probe_cnt = conn_info->ka_max_probe_cnt;
1195         con->dup_ack_theshold = conn_info->dup_ack_theshold;
1196         con->rcv_next = conn_info->rcv_next;
1197         con->snd_una = conn_info->snd_una;
1198         con->snd_next = conn_info->snd_next;
1199         con->snd_max = conn_info->snd_max;
1200         con->snd_wnd = conn_info->snd_wnd;
1201         con->rcv_wnd = conn_info->rcv_wnd;
1202         con->snd_wl1 = conn_info->snd_wl1;
1203         con->cwnd = conn_info->cwnd;
1204         con->ss_thresh = conn_info->ss_thresh;
1205         con->srtt = conn_info->srtt;
1206         con->rtt_var = conn_info->rtt_var;
1207         con->ts_time = conn_info->ts_time;
1208         con->ts_recent = conn_info->ts_recent;
1209         con->ts_recent_age = conn_info->ts_recent_age;
1210         con->total_rt = conn_info->total_rt;
1211         con->ka_timeout_delta = conn_info->ka_timeout_delta;
1212         con->rt_timeout_delta = conn_info->rt_timeout_delta;
1213         con->dup_ack_cnt = conn_info->dup_ack_cnt;
1214         con->snd_wnd_probe_cnt = conn_info->snd_wnd_probe_cnt;
1215         con->ka_probe_cnt = conn_info->ka_probe_cnt;
1216         con->rt_cnt = conn_info->rt_cnt;
1217         con->flow_label = conn_info->flow_label;
1218         con->ka_timeout = conn_info->ka_timeout;
1219         con->ka_interval = conn_info->ka_interval;
1220         con->max_rt_time = conn_info->max_rt_time;
1221         con->initial_rcv_wnd = conn_info->initial_rcv_wnd;
1222         con->ttl = conn_info->ttl;
1223         con->tos_or_tc = conn_info->tos_or_tc;
1224         con->remote_port = conn_info->remote_port;
1225         con->local_port = conn_info->local_port;
1226         con->mss = conn_info->mss;
1227         con->snd_wnd_scale = conn_info->snd_wnd_scale;
1228         con->rcv_wnd_scale = conn_info->rcv_wnd_scale;
1229         con->ts_ticks_per_second = conn_info->ts_ticks_per_second;
1230         con->da_timeout_value = conn_info->da_timeout_value;
1231         con->ack_frequency = conn_info->ack_frequency;
1232
1233         /* Set default values on other connection fields */
1234         con->offl_flags = 0x1;
1235
1236         return qed_sp_iscsi_conn_offload(QED_LEADING_HWFN(cdev), con,
1237                                          QED_SPQ_MODE_EBLOCK, NULL);
1238 }
1239
1240 static int qed_iscsi_update_conn(struct qed_dev *cdev,
1241                                  u32 handle,
1242                                  struct qed_iscsi_params_update *conn_info)
1243 {
1244         struct qed_hash_iscsi_con *hash_con;
1245         struct qed_iscsi_conn *con;
1246
1247         hash_con = qed_iscsi_get_hash(cdev, handle);
1248         if (!hash_con) {
1249                 DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
1250                           handle);
1251                 return -EINVAL;
1252         }
1253
1254         /* Update the connection with information from the params */
1255         con = hash_con->con;
1256         con->update_flag = conn_info->update_flag;
1257         con->max_seq_size = conn_info->max_seq_size;
1258         con->max_recv_pdu_length = conn_info->max_recv_pdu_length;
1259         con->max_send_pdu_length = conn_info->max_send_pdu_length;
1260         con->first_seq_length = conn_info->first_seq_length;
1261         con->exp_stat_sn = conn_info->exp_stat_sn;
1262
1263         return qed_sp_iscsi_conn_update(QED_LEADING_HWFN(cdev), con,
1264                                         QED_SPQ_MODE_EBLOCK, NULL);
1265 }
1266
1267 static int qed_iscsi_clear_conn_sq(struct qed_dev *cdev, u32 handle)
1268 {
1269         struct qed_hash_iscsi_con *hash_con;
1270
1271         hash_con = qed_iscsi_get_hash(cdev, handle);
1272         if (!hash_con) {
1273                 DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
1274                           handle);
1275                 return -EINVAL;
1276         }
1277
1278         return qed_sp_iscsi_conn_clear_sq(QED_LEADING_HWFN(cdev),
1279                                           hash_con->con,
1280                                           QED_SPQ_MODE_EBLOCK, NULL);
1281 }
1282
1283 static int qed_iscsi_destroy_conn(struct qed_dev *cdev,
1284                                   u32 handle, u8 abrt_conn)
1285 {
1286         struct qed_hash_iscsi_con *hash_con;
1287
1288         hash_con = qed_iscsi_get_hash(cdev, handle);
1289         if (!hash_con) {
1290                 DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
1291                           handle);
1292                 return -EINVAL;
1293         }
1294
1295         hash_con->con->abortive_dsconnect = abrt_conn;
1296
1297         return qed_sp_iscsi_conn_terminate(QED_LEADING_HWFN(cdev),
1298                                            hash_con->con,
1299                                            QED_SPQ_MODE_EBLOCK, NULL);
1300 }
1301
1302 static int qed_iscsi_stats(struct qed_dev *cdev, struct qed_iscsi_stats *stats)
1303 {
1304         return qed_iscsi_get_stats(QED_LEADING_HWFN(cdev), stats);
1305 }
1306
1307 static const struct qed_iscsi_ops qed_iscsi_ops_pass = {
1308         .common = &qed_common_ops_pass,
1309         .ll2 = &qed_ll2_ops_pass,
1310         .fill_dev_info = &qed_fill_iscsi_dev_info,
1311         .register_ops = &qed_register_iscsi_ops,
1312         .start = &qed_iscsi_start,
1313         .stop = &qed_iscsi_stop,
1314         .acquire_conn = &qed_iscsi_acquire_conn,
1315         .release_conn = &qed_iscsi_release_conn,
1316         .offload_conn = &qed_iscsi_offload_conn,
1317         .update_conn = &qed_iscsi_update_conn,
1318         .destroy_conn = &qed_iscsi_destroy_conn,
1319         .clear_sq = &qed_iscsi_clear_conn_sq,
1320         .get_stats = &qed_iscsi_stats,
1321 };
1322
1323 const struct qed_iscsi_ops *qed_get_iscsi_ops(void)
1324 {
1325         return &qed_iscsi_ops_pass;
1326 }
1327 EXPORT_SYMBOL(qed_get_iscsi_ops);
1328
1329 void qed_put_iscsi_ops(void)
1330 {
1331 }
1332 EXPORT_SYMBOL(qed_put_iscsi_ops);