linux/drivers/net/ethernet/qlogic/qed/qed_iscsi.c
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   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/workqueue.h>
  48#include <linux/errno.h>
  49#include <linux/list.h>
  50#include <linux/spinlock.h>
  51#include <linux/qed/qed_iscsi_if.h>
  52#include "qed.h"
  53#include "qed_cxt.h"
  54#include "qed_dev_api.h"
  55#include "qed_hsi.h"
  56#include "qed_hw.h"
  57#include "qed_int.h"
  58#include "qed_iscsi.h"
  59#include "qed_ll2.h"
  60#include "qed_mcp.h"
  61#include "qed_sp.h"
  62#include "qed_sriov.h"
  63#include "qed_reg_addr.h"
  64
  65struct qed_iscsi_conn {
  66        struct list_head list_entry;
  67        bool free_on_delete;
  68
  69        u16 conn_id;
  70        u32 icid;
  71        u32 fw_cid;
  72
  73        u8 layer_code;
  74        u8 offl_flags;
  75        u8 connect_mode;
  76        u32 initial_ack;
  77        dma_addr_t sq_pbl_addr;
  78        struct qed_chain r2tq;
  79        struct qed_chain xhq;
  80        struct qed_chain uhq;
  81
  82        struct tcp_upload_params *tcp_upload_params_virt_addr;
  83        dma_addr_t tcp_upload_params_phys_addr;
  84        struct scsi_terminate_extra_params *queue_cnts_virt_addr;
  85        dma_addr_t queue_cnts_phys_addr;
  86        dma_addr_t syn_phy_addr;
  87
  88        u16 syn_ip_payload_length;
  89        u8 local_mac[6];
  90        u8 remote_mac[6];
  91        u16 vlan_id;
  92        u16 tcp_flags;
  93        u8 ip_version;
  94        u32 remote_ip[4];
  95        u32 local_ip[4];
  96        u8 ka_max_probe_cnt;
  97        u8 dup_ack_theshold;
  98        u32 rcv_next;
  99        u32 snd_una;
 100        u32 snd_next;
 101        u32 snd_max;
 102        u32 snd_wnd;
 103        u32 rcv_wnd;
 104        u32 snd_wl1;
 105        u32 cwnd;
 106        u32 ss_thresh;
 107        u16 srtt;
 108        u16 rtt_var;
 109        u32 ts_recent;
 110        u32 ts_recent_age;
 111        u32 total_rt;
 112        u32 ka_timeout_delta;
 113        u32 rt_timeout_delta;
 114        u8 dup_ack_cnt;
 115        u8 snd_wnd_probe_cnt;
 116        u8 ka_probe_cnt;
 117        u8 rt_cnt;
 118        u32 flow_label;
 119        u32 ka_timeout;
 120        u32 ka_interval;
 121        u32 max_rt_time;
 122        u32 initial_rcv_wnd;
 123        u8 ttl;
 124        u8 tos_or_tc;
 125        u16 remote_port;
 126        u16 local_port;
 127        u16 mss;
 128        u8 snd_wnd_scale;
 129        u8 rcv_wnd_scale;
 130        u16 da_timeout_value;
 131        u8 ack_frequency;
 132
 133        u8 update_flag;
 134        u8 default_cq;
 135        u32 max_seq_size;
 136        u32 max_recv_pdu_length;
 137        u32 max_send_pdu_length;
 138        u32 first_seq_length;
 139        u32 exp_stat_sn;
 140        u32 stat_sn;
 141        u16 physical_q0;
 142        u16 physical_q1;
 143        u8 abortive_dsconnect;
 144};
 145
 146static int
 147qed_iscsi_async_event(struct qed_hwfn *p_hwfn,
 148                      u8 fw_event_code,
 149                      u16 echo, union event_ring_data *data, u8 fw_return_code)
 150{
 151        if (p_hwfn->p_iscsi_info->event_cb) {
 152                struct qed_iscsi_info *p_iscsi = p_hwfn->p_iscsi_info;
 153
 154                return p_iscsi->event_cb(p_iscsi->event_context,
 155                                         fw_event_code, data);
 156        } else {
 157                DP_NOTICE(p_hwfn, "iSCSI async completion is not set\n");
 158                return -EINVAL;
 159        }
 160}
 161
 162static int
 163qed_sp_iscsi_func_start(struct qed_hwfn *p_hwfn,
 164                        enum spq_mode comp_mode,
 165                        struct qed_spq_comp_cb *p_comp_addr,
 166                        void *event_context, iscsi_event_cb_t async_event_cb)
 167{
 168        struct iscsi_init_ramrod_params *p_ramrod = NULL;
 169        struct scsi_init_func_queues *p_queue = NULL;
 170        struct qed_iscsi_pf_params *p_params = NULL;
 171        struct iscsi_spe_func_init *p_init = NULL;
 172        struct qed_spq_entry *p_ent = NULL;
 173        struct qed_sp_init_data init_data;
 174        int rc = 0;
 175        u32 dval;
 176        u16 val;
 177        u8 i;
 178
 179        /* Get SPQ entry */
 180        memset(&init_data, 0, sizeof(init_data));
 181        init_data.cid = qed_spq_get_cid(p_hwfn);
 182        init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 183        init_data.comp_mode = comp_mode;
 184        init_data.p_comp_data = p_comp_addr;
 185
 186        rc = qed_sp_init_request(p_hwfn, &p_ent,
 187                                 ISCSI_RAMROD_CMD_ID_INIT_FUNC,
 188                                 PROTOCOLID_ISCSI, &init_data);
 189        if (rc)
 190                return rc;
 191
 192        p_ramrod = &p_ent->ramrod.iscsi_init;
 193        p_init = &p_ramrod->iscsi_init_spe;
 194        p_params = &p_hwfn->pf_params.iscsi_pf_params;
 195        p_queue = &p_init->q_params;
 196
 197        /* Sanity */
 198        if (p_params->num_queues > p_hwfn->hw_info.feat_num[QED_ISCSI_CQ]) {
 199                DP_ERR(p_hwfn,
 200                       "Cannot satisfy CQ amount. Queues requested %d, CQs available %d. Aborting function start\n",
 201                       p_params->num_queues,
 202                       p_hwfn->hw_info.feat_num[QED_ISCSI_CQ]);
 203                qed_sp_destroy_request(p_hwfn, p_ent);
 204                return -EINVAL;
 205        }
 206
 207        SET_FIELD(p_init->hdr.flags,
 208                  ISCSI_SLOW_PATH_HDR_LAYER_CODE, ISCSI_SLOW_PATH_LAYER_CODE);
 209        p_init->hdr.op_code = ISCSI_RAMROD_CMD_ID_INIT_FUNC;
 210
 211        val = p_params->half_way_close_timeout;
 212        p_init->half_way_close_timeout = cpu_to_le16(val);
 213        p_init->num_sq_pages_in_ring = p_params->num_sq_pages_in_ring;
 214        p_init->num_r2tq_pages_in_ring = p_params->num_r2tq_pages_in_ring;
 215        p_init->num_uhq_pages_in_ring = p_params->num_uhq_pages_in_ring;
 216        p_init->ll2_rx_queue_id = p_hwfn->hw_info.resc_start[QED_LL2_QUEUE] +
 217                                  p_params->ll2_ooo_queue_id;
 218
 219        p_init->func_params.log_page_size = p_params->log_page_size;
 220        val = p_params->num_tasks;
 221        p_init->func_params.num_tasks = cpu_to_le16(val);
 222        p_init->debug_mode.flags = p_params->debug_mode;
 223
 224        DMA_REGPAIR_LE(p_queue->glbl_q_params_addr,
 225                       p_params->glbl_q_params_addr);
 226
 227        val = p_params->cq_num_entries;
 228        p_queue->cq_num_entries = cpu_to_le16(val);
 229        val = p_params->cmdq_num_entries;
 230        p_queue->cmdq_num_entries = cpu_to_le16(val);
 231        p_queue->num_queues = p_params->num_queues;
 232        dval = (u8)p_hwfn->hw_info.resc_start[QED_CMDQS_CQS];
 233        p_queue->queue_relative_offset = (u8)dval;
 234        p_queue->cq_sb_pi = p_params->gl_rq_pi;
 235        p_queue->cmdq_sb_pi = p_params->gl_cmd_pi;
 236
 237        for (i = 0; i < p_params->num_queues; i++) {
 238                val = qed_get_igu_sb_id(p_hwfn, i);
 239                p_queue->cq_cmdq_sb_num_arr[i] = cpu_to_le16(val);
 240        }
 241
 242        p_queue->bdq_resource_id = (u8)RESC_START(p_hwfn, QED_BDQ);
 243
 244        DMA_REGPAIR_LE(p_queue->bdq_pbl_base_address[BDQ_ID_RQ],
 245                       p_params->bdq_pbl_base_addr[BDQ_ID_RQ]);
 246        p_queue->bdq_pbl_num_entries[BDQ_ID_RQ] =
 247            p_params->bdq_pbl_num_entries[BDQ_ID_RQ];
 248        val = p_params->bdq_xoff_threshold[BDQ_ID_RQ];
 249        p_queue->bdq_xoff_threshold[BDQ_ID_RQ] = cpu_to_le16(val);
 250        val = p_params->bdq_xon_threshold[BDQ_ID_RQ];
 251        p_queue->bdq_xon_threshold[BDQ_ID_RQ] = cpu_to_le16(val);
 252
 253        DMA_REGPAIR_LE(p_queue->bdq_pbl_base_address[BDQ_ID_IMM_DATA],
 254                       p_params->bdq_pbl_base_addr[BDQ_ID_IMM_DATA]);
 255        p_queue->bdq_pbl_num_entries[BDQ_ID_IMM_DATA] =
 256            p_params->bdq_pbl_num_entries[BDQ_ID_IMM_DATA];
 257        val = p_params->bdq_xoff_threshold[BDQ_ID_IMM_DATA];
 258        p_queue->bdq_xoff_threshold[BDQ_ID_IMM_DATA] = cpu_to_le16(val);
 259        val = p_params->bdq_xon_threshold[BDQ_ID_IMM_DATA];
 260        p_queue->bdq_xon_threshold[BDQ_ID_IMM_DATA] = cpu_to_le16(val);
 261        val = p_params->rq_buffer_size;
 262        p_queue->rq_buffer_size = cpu_to_le16(val);
 263        if (p_params->is_target) {
 264                SET_FIELD(p_queue->q_validity,
 265                          SCSI_INIT_FUNC_QUEUES_RQ_VALID, 1);
 266                if (p_queue->bdq_pbl_num_entries[BDQ_ID_IMM_DATA])
 267                        SET_FIELD(p_queue->q_validity,
 268                                  SCSI_INIT_FUNC_QUEUES_IMM_DATA_VALID, 1);
 269                SET_FIELD(p_queue->q_validity,
 270                          SCSI_INIT_FUNC_QUEUES_CMD_VALID, 1);
 271        } else {
 272                SET_FIELD(p_queue->q_validity,
 273                          SCSI_INIT_FUNC_QUEUES_RQ_VALID, 1);
 274        }
 275        p_ramrod->tcp_init.two_msl_timer = cpu_to_le32(p_params->two_msl_timer);
 276        val = p_params->tx_sws_timer;
 277        p_ramrod->tcp_init.tx_sws_timer = cpu_to_le16(val);
 278        p_ramrod->tcp_init.max_fin_rt = p_params->max_fin_rt;
 279
 280        p_hwfn->p_iscsi_info->event_context = event_context;
 281        p_hwfn->p_iscsi_info->event_cb = async_event_cb;
 282
 283        qed_spq_register_async_cb(p_hwfn, PROTOCOLID_ISCSI,
 284                                  qed_iscsi_async_event);
 285
 286        return qed_spq_post(p_hwfn, p_ent, NULL);
 287}
 288
 289static int qed_sp_iscsi_conn_offload(struct qed_hwfn *p_hwfn,
 290                                     struct qed_iscsi_conn *p_conn,
 291                                     enum spq_mode comp_mode,
 292                                     struct qed_spq_comp_cb *p_comp_addr)
 293{
 294        struct iscsi_spe_conn_offload *p_ramrod = NULL;
 295        struct tcp_offload_params_opt2 *p_tcp2 = NULL;
 296        struct tcp_offload_params *p_tcp = NULL;
 297        struct qed_spq_entry *p_ent = NULL;
 298        struct qed_sp_init_data init_data;
 299        dma_addr_t r2tq_pbl_addr;
 300        dma_addr_t xhq_pbl_addr;
 301        dma_addr_t uhq_pbl_addr;
 302        u16 physical_q;
 303        int rc = 0;
 304        u32 dval;
 305        u16 wval;
 306        u16 *p;
 307        u8 i;
 308
 309        /* Get SPQ entry */
 310        memset(&init_data, 0, sizeof(init_data));
 311        init_data.cid = p_conn->icid;
 312        init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 313        init_data.comp_mode = comp_mode;
 314        init_data.p_comp_data = p_comp_addr;
 315
 316        rc = qed_sp_init_request(p_hwfn, &p_ent,
 317                                 ISCSI_RAMROD_CMD_ID_OFFLOAD_CONN,
 318                                 PROTOCOLID_ISCSI, &init_data);
 319        if (rc)
 320                return rc;
 321
 322        p_ramrod = &p_ent->ramrod.iscsi_conn_offload;
 323
 324        /* Transmission PQ is the first of the PF */
 325        physical_q = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);
 326        p_conn->physical_q0 = cpu_to_le16(physical_q);
 327        p_ramrod->iscsi.physical_q0 = cpu_to_le16(physical_q);
 328
 329        /* iSCSI Pure-ACK PQ */
 330        physical_q = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_ACK);
 331        p_conn->physical_q1 = cpu_to_le16(physical_q);
 332        p_ramrod->iscsi.physical_q1 = cpu_to_le16(physical_q);
 333
 334        p_ramrod->hdr.op_code = ISCSI_RAMROD_CMD_ID_OFFLOAD_CONN;
 335        SET_FIELD(p_ramrod->hdr.flags, ISCSI_SLOW_PATH_HDR_LAYER_CODE,
 336                  p_conn->layer_code);
 337
 338        p_ramrod->conn_id = cpu_to_le16(p_conn->conn_id);
 339        p_ramrod->fw_cid = cpu_to_le32(p_conn->icid);
 340
 341        DMA_REGPAIR_LE(p_ramrod->iscsi.sq_pbl_addr, p_conn->sq_pbl_addr);
 342
 343        r2tq_pbl_addr = qed_chain_get_pbl_phys(&p_conn->r2tq);
 344        DMA_REGPAIR_LE(p_ramrod->iscsi.r2tq_pbl_addr, r2tq_pbl_addr);
 345
 346        xhq_pbl_addr = qed_chain_get_pbl_phys(&p_conn->xhq);
 347        DMA_REGPAIR_LE(p_ramrod->iscsi.xhq_pbl_addr, xhq_pbl_addr);
 348
 349        uhq_pbl_addr = qed_chain_get_pbl_phys(&p_conn->uhq);
 350        DMA_REGPAIR_LE(p_ramrod->iscsi.uhq_pbl_addr, uhq_pbl_addr);
 351
 352        p_ramrod->iscsi.initial_ack = cpu_to_le32(p_conn->initial_ack);
 353        p_ramrod->iscsi.flags = p_conn->offl_flags;
 354        p_ramrod->iscsi.default_cq = p_conn->default_cq;
 355        p_ramrod->iscsi.stat_sn = cpu_to_le32(p_conn->stat_sn);
 356
 357        if (!GET_FIELD(p_ramrod->iscsi.flags,
 358                       ISCSI_CONN_OFFLOAD_PARAMS_TCP_ON_CHIP_1B)) {
 359                p_tcp = &p_ramrod->tcp;
 360
 361                p = (u16 *)p_conn->local_mac;
 362                p_tcp->local_mac_addr_hi = swab16(get_unaligned(p));
 363                p_tcp->local_mac_addr_mid = swab16(get_unaligned(p + 1));
 364                p_tcp->local_mac_addr_lo = swab16(get_unaligned(p + 2));
 365
 366                p = (u16 *)p_conn->remote_mac;
 367                p_tcp->remote_mac_addr_hi = swab16(get_unaligned(p));
 368                p_tcp->remote_mac_addr_mid = swab16(get_unaligned(p + 1));
 369                p_tcp->remote_mac_addr_lo = swab16(get_unaligned(p + 2));
 370
 371                p_tcp->vlan_id = cpu_to_le16(p_conn->vlan_id);
 372
 373                p_tcp->flags = cpu_to_le16(p_conn->tcp_flags);
 374                p_tcp->ip_version = p_conn->ip_version;
 375                for (i = 0; i < 4; i++) {
 376                        dval = p_conn->remote_ip[i];
 377                        p_tcp->remote_ip[i] = cpu_to_le32(dval);
 378                        dval = p_conn->local_ip[i];
 379                        p_tcp->local_ip[i] = cpu_to_le32(dval);
 380                }
 381                p_tcp->ka_max_probe_cnt = p_conn->ka_max_probe_cnt;
 382                p_tcp->dup_ack_theshold = p_conn->dup_ack_theshold;
 383
 384                p_tcp->rcv_next = cpu_to_le32(p_conn->rcv_next);
 385                p_tcp->snd_una = cpu_to_le32(p_conn->snd_una);
 386                p_tcp->snd_next = cpu_to_le32(p_conn->snd_next);
 387                p_tcp->snd_max = cpu_to_le32(p_conn->snd_max);
 388                p_tcp->snd_wnd = cpu_to_le32(p_conn->snd_wnd);
 389                p_tcp->rcv_wnd = cpu_to_le32(p_conn->rcv_wnd);
 390                p_tcp->snd_wl1 = cpu_to_le32(p_conn->snd_wl1);
 391                p_tcp->cwnd = cpu_to_le32(p_conn->cwnd);
 392                p_tcp->ss_thresh = cpu_to_le32(p_conn->ss_thresh);
 393                p_tcp->srtt = cpu_to_le16(p_conn->srtt);
 394                p_tcp->rtt_var = cpu_to_le16(p_conn->rtt_var);
 395                p_tcp->ts_recent = cpu_to_le32(p_conn->ts_recent);
 396                p_tcp->ts_recent_age = cpu_to_le32(p_conn->ts_recent_age);
 397                p_tcp->total_rt = cpu_to_le32(p_conn->total_rt);
 398                dval = p_conn->ka_timeout_delta;
 399                p_tcp->ka_timeout_delta = cpu_to_le32(dval);
 400                dval = p_conn->rt_timeout_delta;
 401                p_tcp->rt_timeout_delta = cpu_to_le32(dval);
 402                p_tcp->dup_ack_cnt = p_conn->dup_ack_cnt;
 403                p_tcp->snd_wnd_probe_cnt = p_conn->snd_wnd_probe_cnt;
 404                p_tcp->ka_probe_cnt = p_conn->ka_probe_cnt;
 405                p_tcp->rt_cnt = p_conn->rt_cnt;
 406                p_tcp->flow_label = cpu_to_le32(p_conn->flow_label);
 407                p_tcp->ka_timeout = cpu_to_le32(p_conn->ka_timeout);
 408                p_tcp->ka_interval = cpu_to_le32(p_conn->ka_interval);
 409                p_tcp->max_rt_time = cpu_to_le32(p_conn->max_rt_time);
 410                dval = p_conn->initial_rcv_wnd;
 411                p_tcp->initial_rcv_wnd = cpu_to_le32(dval);
 412                p_tcp->ttl = p_conn->ttl;
 413                p_tcp->tos_or_tc = p_conn->tos_or_tc;
 414                p_tcp->remote_port = cpu_to_le16(p_conn->remote_port);
 415                p_tcp->local_port = cpu_to_le16(p_conn->local_port);
 416                p_tcp->mss = cpu_to_le16(p_conn->mss);
 417                p_tcp->snd_wnd_scale = p_conn->snd_wnd_scale;
 418                p_tcp->rcv_wnd_scale = p_conn->rcv_wnd_scale;
 419                wval = p_conn->da_timeout_value;
 420                p_tcp->da_timeout_value = cpu_to_le16(wval);
 421                p_tcp->ack_frequency = p_conn->ack_frequency;
 422                p_tcp->connect_mode = p_conn->connect_mode;
 423        } else {
 424                p_tcp2 =
 425                    &((struct iscsi_spe_conn_offload_option2 *)p_ramrod)->tcp;
 426
 427                p = (u16 *)p_conn->local_mac;
 428                p_tcp2->local_mac_addr_hi = swab16(get_unaligned(p));
 429                p_tcp2->local_mac_addr_mid = swab16(get_unaligned(p + 1));
 430                p_tcp2->local_mac_addr_lo = swab16(get_unaligned(p + 2));
 431
 432                p = (u16 *)p_conn->remote_mac;
 433                p_tcp2->remote_mac_addr_hi = swab16(get_unaligned(p));
 434                p_tcp2->remote_mac_addr_mid = swab16(get_unaligned(p + 1));
 435                p_tcp2->remote_mac_addr_lo = swab16(get_unaligned(p + 2));
 436
 437                p_tcp2->vlan_id = cpu_to_le16(p_conn->vlan_id);
 438                p_tcp2->flags = cpu_to_le16(p_conn->tcp_flags);
 439
 440                p_tcp2->ip_version = p_conn->ip_version;
 441                for (i = 0; i < 4; i++) {
 442                        dval = p_conn->remote_ip[i];
 443                        p_tcp2->remote_ip[i] = cpu_to_le32(dval);
 444                        dval = p_conn->local_ip[i];
 445                        p_tcp2->local_ip[i] = cpu_to_le32(dval);
 446                }
 447
 448                p_tcp2->flow_label = cpu_to_le32(p_conn->flow_label);
 449                p_tcp2->ttl = p_conn->ttl;
 450                p_tcp2->tos_or_tc = p_conn->tos_or_tc;
 451                p_tcp2->remote_port = cpu_to_le16(p_conn->remote_port);
 452                p_tcp2->local_port = cpu_to_le16(p_conn->local_port);
 453                p_tcp2->mss = cpu_to_le16(p_conn->mss);
 454                p_tcp2->rcv_wnd_scale = p_conn->rcv_wnd_scale;
 455                p_tcp2->connect_mode = p_conn->connect_mode;
 456                wval = p_conn->syn_ip_payload_length;
 457                p_tcp2->syn_ip_payload_length = cpu_to_le16(wval);
 458                p_tcp2->syn_phy_addr_lo = DMA_LO_LE(p_conn->syn_phy_addr);
 459                p_tcp2->syn_phy_addr_hi = DMA_HI_LE(p_conn->syn_phy_addr);
 460                p_tcp2->cwnd = cpu_to_le32(p_conn->cwnd);
 461                p_tcp2->ka_max_probe_cnt = p_conn->ka_probe_cnt;
 462                p_tcp2->ka_timeout = cpu_to_le32(p_conn->ka_timeout);
 463                p_tcp2->max_rt_time = cpu_to_le32(p_conn->max_rt_time);
 464                p_tcp2->ka_interval = cpu_to_le32(p_conn->ka_interval);
 465        }
 466
 467        return qed_spq_post(p_hwfn, p_ent, NULL);
 468}
 469
 470static int qed_sp_iscsi_conn_update(struct qed_hwfn *p_hwfn,
 471                                    struct qed_iscsi_conn *p_conn,
 472                                    enum spq_mode comp_mode,
 473                                    struct qed_spq_comp_cb *p_comp_addr)
 474{
 475        struct iscsi_conn_update_ramrod_params *p_ramrod = NULL;
 476        struct qed_spq_entry *p_ent = NULL;
 477        struct qed_sp_init_data init_data;
 478        int rc = -EINVAL;
 479        u32 dval;
 480
 481        /* Get SPQ entry */
 482        memset(&init_data, 0, sizeof(init_data));
 483        init_data.cid = p_conn->icid;
 484        init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 485        init_data.comp_mode = comp_mode;
 486        init_data.p_comp_data = p_comp_addr;
 487
 488        rc = qed_sp_init_request(p_hwfn, &p_ent,
 489                                 ISCSI_RAMROD_CMD_ID_UPDATE_CONN,
 490                                 PROTOCOLID_ISCSI, &init_data);
 491        if (rc)
 492                return rc;
 493
 494        p_ramrod = &p_ent->ramrod.iscsi_conn_update;
 495        p_ramrod->hdr.op_code = ISCSI_RAMROD_CMD_ID_UPDATE_CONN;
 496        SET_FIELD(p_ramrod->hdr.flags,
 497                  ISCSI_SLOW_PATH_HDR_LAYER_CODE, p_conn->layer_code);
 498
 499        p_ramrod->conn_id = cpu_to_le16(p_conn->conn_id);
 500        p_ramrod->fw_cid = cpu_to_le32(p_conn->icid);
 501        p_ramrod->flags = p_conn->update_flag;
 502        p_ramrod->max_seq_size = cpu_to_le32(p_conn->max_seq_size);
 503        dval = p_conn->max_recv_pdu_length;
 504        p_ramrod->max_recv_pdu_length = cpu_to_le32(dval);
 505        dval = p_conn->max_send_pdu_length;
 506        p_ramrod->max_send_pdu_length = cpu_to_le32(dval);
 507        dval = p_conn->first_seq_length;
 508        p_ramrod->first_seq_length = cpu_to_le32(dval);
 509        p_ramrod->exp_stat_sn = cpu_to_le32(p_conn->exp_stat_sn);
 510
 511        return qed_spq_post(p_hwfn, p_ent, NULL);
 512}
 513
 514static int
 515qed_sp_iscsi_mac_update(struct qed_hwfn *p_hwfn,
 516                        struct qed_iscsi_conn *p_conn,
 517                        enum spq_mode comp_mode,
 518                        struct qed_spq_comp_cb *p_comp_addr)
 519{
 520        struct iscsi_spe_conn_mac_update *p_ramrod = NULL;
 521        struct qed_spq_entry *p_ent = NULL;
 522        struct qed_sp_init_data init_data;
 523        int rc = -EINVAL;
 524        u8 ucval;
 525
 526        /* Get SPQ entry */
 527        memset(&init_data, 0, sizeof(init_data));
 528        init_data.cid = p_conn->icid;
 529        init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 530        init_data.comp_mode = comp_mode;
 531        init_data.p_comp_data = p_comp_addr;
 532
 533        rc = qed_sp_init_request(p_hwfn, &p_ent,
 534                                 ISCSI_RAMROD_CMD_ID_MAC_UPDATE,
 535                                 PROTOCOLID_ISCSI, &init_data);
 536        if (rc)
 537                return rc;
 538
 539        p_ramrod = &p_ent->ramrod.iscsi_conn_mac_update;
 540        p_ramrod->hdr.op_code = ISCSI_RAMROD_CMD_ID_MAC_UPDATE;
 541        SET_FIELD(p_ramrod->hdr.flags,
 542                  ISCSI_SLOW_PATH_HDR_LAYER_CODE, p_conn->layer_code);
 543
 544        p_ramrod->conn_id = cpu_to_le16(p_conn->conn_id);
 545        p_ramrod->fw_cid = cpu_to_le32(p_conn->icid);
 546        ucval = p_conn->remote_mac[1];
 547        ((u8 *)(&p_ramrod->remote_mac_addr_hi))[0] = ucval;
 548        ucval = p_conn->remote_mac[0];
 549        ((u8 *)(&p_ramrod->remote_mac_addr_hi))[1] = ucval;
 550        ucval = p_conn->remote_mac[3];
 551        ((u8 *)(&p_ramrod->remote_mac_addr_mid))[0] = ucval;
 552        ucval = p_conn->remote_mac[2];
 553        ((u8 *)(&p_ramrod->remote_mac_addr_mid))[1] = ucval;
 554        ucval = p_conn->remote_mac[5];
 555        ((u8 *)(&p_ramrod->remote_mac_addr_lo))[0] = ucval;
 556        ucval = p_conn->remote_mac[4];
 557        ((u8 *)(&p_ramrod->remote_mac_addr_lo))[1] = ucval;
 558
 559        return qed_spq_post(p_hwfn, p_ent, NULL);
 560}
 561
 562static int qed_sp_iscsi_conn_terminate(struct qed_hwfn *p_hwfn,
 563                                       struct qed_iscsi_conn *p_conn,
 564                                       enum spq_mode comp_mode,
 565                                       struct qed_spq_comp_cb *p_comp_addr)
 566{
 567        struct iscsi_spe_conn_termination *p_ramrod = NULL;
 568        struct qed_spq_entry *p_ent = NULL;
 569        struct qed_sp_init_data init_data;
 570        int rc = -EINVAL;
 571
 572        /* Get SPQ entry */
 573        memset(&init_data, 0, sizeof(init_data));
 574        init_data.cid = p_conn->icid;
 575        init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 576        init_data.comp_mode = comp_mode;
 577        init_data.p_comp_data = p_comp_addr;
 578
 579        rc = qed_sp_init_request(p_hwfn, &p_ent,
 580                                 ISCSI_RAMROD_CMD_ID_TERMINATION_CONN,
 581                                 PROTOCOLID_ISCSI, &init_data);
 582        if (rc)
 583                return rc;
 584
 585        p_ramrod = &p_ent->ramrod.iscsi_conn_terminate;
 586        p_ramrod->hdr.op_code = ISCSI_RAMROD_CMD_ID_TERMINATION_CONN;
 587        SET_FIELD(p_ramrod->hdr.flags,
 588                  ISCSI_SLOW_PATH_HDR_LAYER_CODE, p_conn->layer_code);
 589
 590        p_ramrod->conn_id = cpu_to_le16(p_conn->conn_id);
 591        p_ramrod->fw_cid = cpu_to_le32(p_conn->icid);
 592        p_ramrod->abortive = p_conn->abortive_dsconnect;
 593
 594        DMA_REGPAIR_LE(p_ramrod->query_params_addr,
 595                       p_conn->tcp_upload_params_phys_addr);
 596        DMA_REGPAIR_LE(p_ramrod->queue_cnts_addr, p_conn->queue_cnts_phys_addr);
 597
 598        return qed_spq_post(p_hwfn, p_ent, NULL);
 599}
 600
 601static int qed_sp_iscsi_conn_clear_sq(struct qed_hwfn *p_hwfn,
 602                                      struct qed_iscsi_conn *p_conn,
 603                                      enum spq_mode comp_mode,
 604                                      struct qed_spq_comp_cb *p_comp_addr)
 605{
 606        struct iscsi_slow_path_hdr *p_ramrod = NULL;
 607        struct qed_spq_entry *p_ent = NULL;
 608        struct qed_sp_init_data init_data;
 609        int rc = -EINVAL;
 610
 611        /* Get SPQ entry */
 612        memset(&init_data, 0, sizeof(init_data));
 613        init_data.cid = p_conn->icid;
 614        init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 615        init_data.comp_mode = comp_mode;
 616        init_data.p_comp_data = p_comp_addr;
 617
 618        rc = qed_sp_init_request(p_hwfn, &p_ent,
 619                                 ISCSI_RAMROD_CMD_ID_CLEAR_SQ,
 620                                 PROTOCOLID_ISCSI, &init_data);
 621        if (rc)
 622                return rc;
 623
 624        p_ramrod = &p_ent->ramrod.iscsi_empty;
 625        p_ramrod->op_code = ISCSI_RAMROD_CMD_ID_CLEAR_SQ;
 626        SET_FIELD(p_ramrod->flags,
 627                  ISCSI_SLOW_PATH_HDR_LAYER_CODE, p_conn->layer_code);
 628
 629        return qed_spq_post(p_hwfn, p_ent, NULL);
 630}
 631
 632static int qed_sp_iscsi_func_stop(struct qed_hwfn *p_hwfn,
 633                                  enum spq_mode comp_mode,
 634                                  struct qed_spq_comp_cb *p_comp_addr)
 635{
 636        struct iscsi_spe_func_dstry *p_ramrod = NULL;
 637        struct qed_spq_entry *p_ent = NULL;
 638        struct qed_sp_init_data init_data;
 639        int rc = 0;
 640
 641        /* Get SPQ entry */
 642        memset(&init_data, 0, sizeof(init_data));
 643        init_data.cid = qed_spq_get_cid(p_hwfn);
 644        init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 645        init_data.comp_mode = comp_mode;
 646        init_data.p_comp_data = p_comp_addr;
 647
 648        rc = qed_sp_init_request(p_hwfn, &p_ent,
 649                                 ISCSI_RAMROD_CMD_ID_DESTROY_FUNC,
 650                                 PROTOCOLID_ISCSI, &init_data);
 651        if (rc)
 652                return rc;
 653
 654        p_ramrod = &p_ent->ramrod.iscsi_destroy;
 655        p_ramrod->hdr.op_code = ISCSI_RAMROD_CMD_ID_DESTROY_FUNC;
 656
 657        rc = qed_spq_post(p_hwfn, p_ent, NULL);
 658
 659        qed_spq_unregister_async_cb(p_hwfn, PROTOCOLID_ISCSI);
 660        return rc;
 661}
 662
 663static void __iomem *qed_iscsi_get_db_addr(struct qed_hwfn *p_hwfn, u32 cid)
 664{
 665        return (u8 __iomem *)p_hwfn->doorbells +
 666                             qed_db_addr(cid, DQ_DEMS_LEGACY);
 667}
 668
 669static void __iomem *qed_iscsi_get_primary_bdq_prod(struct qed_hwfn *p_hwfn,
 670                                                    u8 bdq_id)
 671{
 672        if (RESC_NUM(p_hwfn, QED_BDQ)) {
 673                return (u8 __iomem *)p_hwfn->regview +
 674                       GTT_BAR0_MAP_REG_MSDM_RAM +
 675                       MSTORM_SCSI_BDQ_EXT_PROD_OFFSET(RESC_START(p_hwfn,
 676                                                                  QED_BDQ),
 677                                                       bdq_id);
 678        } else {
 679                DP_NOTICE(p_hwfn, "BDQ is not allocated!\n");
 680                return NULL;
 681        }
 682}
 683
 684static void __iomem *qed_iscsi_get_secondary_bdq_prod(struct qed_hwfn *p_hwfn,
 685                                                      u8 bdq_id)
 686{
 687        if (RESC_NUM(p_hwfn, QED_BDQ)) {
 688                return (u8 __iomem *)p_hwfn->regview +
 689                       GTT_BAR0_MAP_REG_TSDM_RAM +
 690                       TSTORM_SCSI_BDQ_EXT_PROD_OFFSET(RESC_START(p_hwfn,
 691                                                                  QED_BDQ),
 692                                                       bdq_id);
 693        } else {
 694                DP_NOTICE(p_hwfn, "BDQ is not allocated!\n");
 695                return NULL;
 696        }
 697}
 698
 699static int qed_iscsi_setup_connection(struct qed_iscsi_conn *p_conn)
 700{
 701        if (!p_conn->queue_cnts_virt_addr)
 702                goto nomem;
 703        memset(p_conn->queue_cnts_virt_addr, 0,
 704               sizeof(*p_conn->queue_cnts_virt_addr));
 705
 706        if (!p_conn->tcp_upload_params_virt_addr)
 707                goto nomem;
 708        memset(p_conn->tcp_upload_params_virt_addr, 0,
 709               sizeof(*p_conn->tcp_upload_params_virt_addr));
 710
 711        if (!p_conn->r2tq.p_virt_addr)
 712                goto nomem;
 713        qed_chain_pbl_zero_mem(&p_conn->r2tq);
 714
 715        if (!p_conn->uhq.p_virt_addr)
 716                goto nomem;
 717        qed_chain_pbl_zero_mem(&p_conn->uhq);
 718
 719        if (!p_conn->xhq.p_virt_addr)
 720                goto nomem;
 721        qed_chain_pbl_zero_mem(&p_conn->xhq);
 722
 723        return 0;
 724nomem:
 725        return -ENOMEM;
 726}
 727
 728static int qed_iscsi_allocate_connection(struct qed_hwfn *p_hwfn,
 729                                         struct qed_iscsi_conn **p_out_conn)
 730{
 731        u16 uhq_num_elements = 0, xhq_num_elements = 0, r2tq_num_elements = 0;
 732        struct scsi_terminate_extra_params *p_q_cnts = NULL;
 733        struct qed_iscsi_pf_params *p_params = NULL;
 734        struct tcp_upload_params *p_tcp = NULL;
 735        struct qed_iscsi_conn *p_conn = NULL;
 736        int rc = 0;
 737
 738        /* Try finding a free connection that can be used */
 739        spin_lock_bh(&p_hwfn->p_iscsi_info->lock);
 740        if (!list_empty(&p_hwfn->p_iscsi_info->free_list))
 741                p_conn = list_first_entry(&p_hwfn->p_iscsi_info->free_list,
 742                                          struct qed_iscsi_conn, list_entry);
 743        if (p_conn) {
 744                list_del(&p_conn->list_entry);
 745                spin_unlock_bh(&p_hwfn->p_iscsi_info->lock);
 746                *p_out_conn = p_conn;
 747                return 0;
 748        }
 749        spin_unlock_bh(&p_hwfn->p_iscsi_info->lock);
 750
 751        /* Need to allocate a new connection */
 752        p_params = &p_hwfn->pf_params.iscsi_pf_params;
 753
 754        p_conn = kzalloc(sizeof(*p_conn), GFP_KERNEL);
 755        if (!p_conn)
 756                return -ENOMEM;
 757
 758        p_q_cnts = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
 759                                      sizeof(*p_q_cnts),
 760                                      &p_conn->queue_cnts_phys_addr,
 761                                      GFP_KERNEL);
 762        if (!p_q_cnts)
 763                goto nomem_queue_cnts_param;
 764        p_conn->queue_cnts_virt_addr = p_q_cnts;
 765
 766        p_tcp = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
 767                                   sizeof(*p_tcp),
 768                                   &p_conn->tcp_upload_params_phys_addr,
 769                                   GFP_KERNEL);
 770        if (!p_tcp)
 771                goto nomem_upload_param;
 772        p_conn->tcp_upload_params_virt_addr = p_tcp;
 773
 774        r2tq_num_elements = p_params->num_r2tq_pages_in_ring *
 775                            QED_CHAIN_PAGE_SIZE / 0x80;
 776        rc = qed_chain_alloc(p_hwfn->cdev,
 777                             QED_CHAIN_USE_TO_CONSUME_PRODUCE,
 778                             QED_CHAIN_MODE_PBL,
 779                             QED_CHAIN_CNT_TYPE_U16,
 780                             r2tq_num_elements, 0x80, &p_conn->r2tq, NULL);
 781        if (rc)
 782                goto nomem_r2tq;
 783
 784        uhq_num_elements = p_params->num_uhq_pages_in_ring *
 785                           QED_CHAIN_PAGE_SIZE / sizeof(struct iscsi_uhqe);
 786        rc = qed_chain_alloc(p_hwfn->cdev,
 787                             QED_CHAIN_USE_TO_CONSUME_PRODUCE,
 788                             QED_CHAIN_MODE_PBL,
 789                             QED_CHAIN_CNT_TYPE_U16,
 790                             uhq_num_elements,
 791                             sizeof(struct iscsi_uhqe), &p_conn->uhq, NULL);
 792        if (rc)
 793                goto nomem_uhq;
 794
 795        xhq_num_elements = uhq_num_elements;
 796        rc = qed_chain_alloc(p_hwfn->cdev,
 797                             QED_CHAIN_USE_TO_CONSUME_PRODUCE,
 798                             QED_CHAIN_MODE_PBL,
 799                             QED_CHAIN_CNT_TYPE_U16,
 800                             xhq_num_elements,
 801                             sizeof(struct iscsi_xhqe), &p_conn->xhq, NULL);
 802        if (rc)
 803                goto nomem;
 804
 805        p_conn->free_on_delete = true;
 806        *p_out_conn = p_conn;
 807        return 0;
 808
 809nomem:
 810        qed_chain_free(p_hwfn->cdev, &p_conn->uhq);
 811nomem_uhq:
 812        qed_chain_free(p_hwfn->cdev, &p_conn->r2tq);
 813nomem_r2tq:
 814        dma_free_coherent(&p_hwfn->cdev->pdev->dev,
 815                          sizeof(struct tcp_upload_params),
 816                          p_conn->tcp_upload_params_virt_addr,
 817                          p_conn->tcp_upload_params_phys_addr);
 818nomem_upload_param:
 819        dma_free_coherent(&p_hwfn->cdev->pdev->dev,
 820                          sizeof(struct scsi_terminate_extra_params),
 821                          p_conn->queue_cnts_virt_addr,
 822                          p_conn->queue_cnts_phys_addr);
 823nomem_queue_cnts_param:
 824        kfree(p_conn);
 825
 826        return -ENOMEM;
 827}
 828
 829static int qed_iscsi_acquire_connection(struct qed_hwfn *p_hwfn,
 830                                        struct qed_iscsi_conn *p_in_conn,
 831                                        struct qed_iscsi_conn **p_out_conn)
 832{
 833        struct qed_iscsi_conn *p_conn = NULL;
 834        int rc = 0;
 835        u32 icid;
 836
 837        spin_lock_bh(&p_hwfn->p_iscsi_info->lock);
 838        rc = qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_ISCSI, &icid);
 839        spin_unlock_bh(&p_hwfn->p_iscsi_info->lock);
 840        if (rc)
 841                return rc;
 842
 843        /* Use input connection or allocate a new one */
 844        if (p_in_conn)
 845                p_conn = p_in_conn;
 846        else
 847                rc = qed_iscsi_allocate_connection(p_hwfn, &p_conn);
 848
 849        if (!rc)
 850                rc = qed_iscsi_setup_connection(p_conn);
 851
 852        if (rc) {
 853                spin_lock_bh(&p_hwfn->p_iscsi_info->lock);
 854                qed_cxt_release_cid(p_hwfn, icid);
 855                spin_unlock_bh(&p_hwfn->p_iscsi_info->lock);
 856                return rc;
 857        }
 858
 859        p_conn->icid = icid;
 860        p_conn->conn_id = (u16)icid;
 861        p_conn->fw_cid = (p_hwfn->hw_info.opaque_fid << 16) | icid;
 862
 863        *p_out_conn = p_conn;
 864
 865        return rc;
 866}
 867
 868static void qed_iscsi_release_connection(struct qed_hwfn *p_hwfn,
 869                                         struct qed_iscsi_conn *p_conn)
 870{
 871        spin_lock_bh(&p_hwfn->p_iscsi_info->lock);
 872        list_add_tail(&p_conn->list_entry, &p_hwfn->p_iscsi_info->free_list);
 873        qed_cxt_release_cid(p_hwfn, p_conn->icid);
 874        spin_unlock_bh(&p_hwfn->p_iscsi_info->lock);
 875}
 876
 877static void qed_iscsi_free_connection(struct qed_hwfn *p_hwfn,
 878                                      struct qed_iscsi_conn *p_conn)
 879{
 880        qed_chain_free(p_hwfn->cdev, &p_conn->xhq);
 881        qed_chain_free(p_hwfn->cdev, &p_conn->uhq);
 882        qed_chain_free(p_hwfn->cdev, &p_conn->r2tq);
 883        dma_free_coherent(&p_hwfn->cdev->pdev->dev,
 884                          sizeof(struct tcp_upload_params),
 885                          p_conn->tcp_upload_params_virt_addr,
 886                          p_conn->tcp_upload_params_phys_addr);
 887        dma_free_coherent(&p_hwfn->cdev->pdev->dev,
 888                          sizeof(struct scsi_terminate_extra_params),
 889                          p_conn->queue_cnts_virt_addr,
 890                          p_conn->queue_cnts_phys_addr);
 891        kfree(p_conn);
 892}
 893
 894int qed_iscsi_alloc(struct qed_hwfn *p_hwfn)
 895{
 896        struct qed_iscsi_info *p_iscsi_info;
 897
 898        p_iscsi_info = kzalloc(sizeof(*p_iscsi_info), GFP_KERNEL);
 899        if (!p_iscsi_info)
 900                return -ENOMEM;
 901
 902        INIT_LIST_HEAD(&p_iscsi_info->free_list);
 903
 904        p_hwfn->p_iscsi_info = p_iscsi_info;
 905        return 0;
 906}
 907
 908void qed_iscsi_setup(struct qed_hwfn *p_hwfn)
 909{
 910        spin_lock_init(&p_hwfn->p_iscsi_info->lock);
 911}
 912
 913void qed_iscsi_free(struct qed_hwfn *p_hwfn)
 914{
 915        struct qed_iscsi_conn *p_conn = NULL;
 916
 917        if (!p_hwfn->p_iscsi_info)
 918                return;
 919
 920        while (!list_empty(&p_hwfn->p_iscsi_info->free_list)) {
 921                p_conn = list_first_entry(&p_hwfn->p_iscsi_info->free_list,
 922                                          struct qed_iscsi_conn, list_entry);
 923                if (p_conn) {
 924                        list_del(&p_conn->list_entry);
 925                        qed_iscsi_free_connection(p_hwfn, p_conn);
 926                }
 927        }
 928
 929        kfree(p_hwfn->p_iscsi_info);
 930        p_hwfn->p_iscsi_info = NULL;
 931}
 932
 933static void _qed_iscsi_get_tstats(struct qed_hwfn *p_hwfn,
 934                                  struct qed_ptt *p_ptt,
 935                                  struct qed_iscsi_stats *p_stats)
 936{
 937        struct tstorm_iscsi_stats_drv tstats;
 938        u32 tstats_addr;
 939
 940        memset(&tstats, 0, sizeof(tstats));
 941        tstats_addr = BAR0_MAP_REG_TSDM_RAM +
 942                      TSTORM_ISCSI_RX_STATS_OFFSET(p_hwfn->rel_pf_id);
 943        qed_memcpy_from(p_hwfn, p_ptt, &tstats, tstats_addr, sizeof(tstats));
 944
 945        p_stats->iscsi_rx_bytes_cnt =
 946            HILO_64_REGPAIR(tstats.iscsi_rx_bytes_cnt);
 947        p_stats->iscsi_rx_packet_cnt =
 948            HILO_64_REGPAIR(tstats.iscsi_rx_packet_cnt);
 949        p_stats->iscsi_rx_new_ooo_isle_events_cnt =
 950            HILO_64_REGPAIR(tstats.iscsi_rx_new_ooo_isle_events_cnt);
 951        p_stats->iscsi_cmdq_threshold_cnt =
 952            le32_to_cpu(tstats.iscsi_cmdq_threshold_cnt);
 953        p_stats->iscsi_rq_threshold_cnt =
 954            le32_to_cpu(tstats.iscsi_rq_threshold_cnt);
 955        p_stats->iscsi_immq_threshold_cnt =
 956            le32_to_cpu(tstats.iscsi_immq_threshold_cnt);
 957}
 958
 959static void _qed_iscsi_get_mstats(struct qed_hwfn *p_hwfn,
 960                                  struct qed_ptt *p_ptt,
 961                                  struct qed_iscsi_stats *p_stats)
 962{
 963        struct mstorm_iscsi_stats_drv mstats;
 964        u32 mstats_addr;
 965
 966        memset(&mstats, 0, sizeof(mstats));
 967        mstats_addr = BAR0_MAP_REG_MSDM_RAM +
 968                      MSTORM_ISCSI_RX_STATS_OFFSET(p_hwfn->rel_pf_id);
 969        qed_memcpy_from(p_hwfn, p_ptt, &mstats, mstats_addr, sizeof(mstats));
 970
 971        p_stats->iscsi_rx_dropped_pdus_task_not_valid =
 972            HILO_64_REGPAIR(mstats.iscsi_rx_dropped_pdus_task_not_valid);
 973}
 974
 975static void _qed_iscsi_get_ustats(struct qed_hwfn *p_hwfn,
 976                                  struct qed_ptt *p_ptt,
 977                                  struct qed_iscsi_stats *p_stats)
 978{
 979        struct ustorm_iscsi_stats_drv ustats;
 980        u32 ustats_addr;
 981
 982        memset(&ustats, 0, sizeof(ustats));
 983        ustats_addr = BAR0_MAP_REG_USDM_RAM +
 984                      USTORM_ISCSI_RX_STATS_OFFSET(p_hwfn->rel_pf_id);
 985        qed_memcpy_from(p_hwfn, p_ptt, &ustats, ustats_addr, sizeof(ustats));
 986
 987        p_stats->iscsi_rx_data_pdu_cnt =
 988            HILO_64_REGPAIR(ustats.iscsi_rx_data_pdu_cnt);
 989        p_stats->iscsi_rx_r2t_pdu_cnt =
 990            HILO_64_REGPAIR(ustats.iscsi_rx_r2t_pdu_cnt);
 991        p_stats->iscsi_rx_total_pdu_cnt =
 992            HILO_64_REGPAIR(ustats.iscsi_rx_total_pdu_cnt);
 993}
 994
 995static void _qed_iscsi_get_xstats(struct qed_hwfn *p_hwfn,
 996                                  struct qed_ptt *p_ptt,
 997                                  struct qed_iscsi_stats *p_stats)
 998{
 999        struct xstorm_iscsi_stats_drv xstats;
1000        u32 xstats_addr;
1001
1002        memset(&xstats, 0, sizeof(xstats));
1003        xstats_addr = BAR0_MAP_REG_XSDM_RAM +
1004                      XSTORM_ISCSI_TX_STATS_OFFSET(p_hwfn->rel_pf_id);
1005        qed_memcpy_from(p_hwfn, p_ptt, &xstats, xstats_addr, sizeof(xstats));
1006
1007        p_stats->iscsi_tx_go_to_slow_start_event_cnt =
1008            HILO_64_REGPAIR(xstats.iscsi_tx_go_to_slow_start_event_cnt);
1009        p_stats->iscsi_tx_fast_retransmit_event_cnt =
1010            HILO_64_REGPAIR(xstats.iscsi_tx_fast_retransmit_event_cnt);
1011}
1012
1013static void _qed_iscsi_get_ystats(struct qed_hwfn *p_hwfn,
1014                                  struct qed_ptt *p_ptt,
1015                                  struct qed_iscsi_stats *p_stats)
1016{
1017        struct ystorm_iscsi_stats_drv ystats;
1018        u32 ystats_addr;
1019
1020        memset(&ystats, 0, sizeof(ystats));
1021        ystats_addr = BAR0_MAP_REG_YSDM_RAM +
1022                      YSTORM_ISCSI_TX_STATS_OFFSET(p_hwfn->rel_pf_id);
1023        qed_memcpy_from(p_hwfn, p_ptt, &ystats, ystats_addr, sizeof(ystats));
1024
1025        p_stats->iscsi_tx_data_pdu_cnt =
1026            HILO_64_REGPAIR(ystats.iscsi_tx_data_pdu_cnt);
1027        p_stats->iscsi_tx_r2t_pdu_cnt =
1028            HILO_64_REGPAIR(ystats.iscsi_tx_r2t_pdu_cnt);
1029        p_stats->iscsi_tx_total_pdu_cnt =
1030            HILO_64_REGPAIR(ystats.iscsi_tx_total_pdu_cnt);
1031}
1032
1033static void _qed_iscsi_get_pstats(struct qed_hwfn *p_hwfn,
1034                                  struct qed_ptt *p_ptt,
1035                                  struct qed_iscsi_stats *p_stats)
1036{
1037        struct pstorm_iscsi_stats_drv pstats;
1038        u32 pstats_addr;
1039
1040        memset(&pstats, 0, sizeof(pstats));
1041        pstats_addr = BAR0_MAP_REG_PSDM_RAM +
1042                      PSTORM_ISCSI_TX_STATS_OFFSET(p_hwfn->rel_pf_id);
1043        qed_memcpy_from(p_hwfn, p_ptt, &pstats, pstats_addr, sizeof(pstats));
1044
1045        p_stats->iscsi_tx_bytes_cnt =
1046            HILO_64_REGPAIR(pstats.iscsi_tx_bytes_cnt);
1047        p_stats->iscsi_tx_packet_cnt =
1048            HILO_64_REGPAIR(pstats.iscsi_tx_packet_cnt);
1049}
1050
1051static int qed_iscsi_get_stats(struct qed_hwfn *p_hwfn,
1052                               struct qed_iscsi_stats *stats)
1053{
1054        struct qed_ptt *p_ptt;
1055
1056        memset(stats, 0, sizeof(*stats));
1057
1058        p_ptt = qed_ptt_acquire(p_hwfn);
1059        if (!p_ptt) {
1060                DP_ERR(p_hwfn, "Failed to acquire ptt\n");
1061                return -EAGAIN;
1062        }
1063
1064        _qed_iscsi_get_tstats(p_hwfn, p_ptt, stats);
1065        _qed_iscsi_get_mstats(p_hwfn, p_ptt, stats);
1066        _qed_iscsi_get_ustats(p_hwfn, p_ptt, stats);
1067
1068        _qed_iscsi_get_xstats(p_hwfn, p_ptt, stats);
1069        _qed_iscsi_get_ystats(p_hwfn, p_ptt, stats);
1070        _qed_iscsi_get_pstats(p_hwfn, p_ptt, stats);
1071
1072        qed_ptt_release(p_hwfn, p_ptt);
1073
1074        return 0;
1075}
1076
1077struct qed_hash_iscsi_con {
1078        struct hlist_node node;
1079        struct qed_iscsi_conn *con;
1080};
1081
1082static int qed_fill_iscsi_dev_info(struct qed_dev *cdev,
1083                                   struct qed_dev_iscsi_info *info)
1084{
1085        struct qed_hwfn *hwfn = QED_LEADING_HWFN(cdev);
1086
1087        int rc;
1088
1089        memset(info, 0, sizeof(*info));
1090        rc = qed_fill_dev_info(cdev, &info->common);
1091
1092        info->primary_dbq_rq_addr =
1093            qed_iscsi_get_primary_bdq_prod(hwfn, BDQ_ID_RQ);
1094        info->secondary_bdq_rq_addr =
1095            qed_iscsi_get_secondary_bdq_prod(hwfn, BDQ_ID_RQ);
1096
1097        info->num_cqs = FEAT_NUM(hwfn, QED_ISCSI_CQ);
1098
1099        return rc;
1100}
1101
1102static void qed_register_iscsi_ops(struct qed_dev *cdev,
1103                                   struct qed_iscsi_cb_ops *ops, void *cookie)
1104{
1105        cdev->protocol_ops.iscsi = ops;
1106        cdev->ops_cookie = cookie;
1107}
1108
1109static struct qed_hash_iscsi_con *qed_iscsi_get_hash(struct qed_dev *cdev,
1110                                                     u32 handle)
1111{
1112        struct qed_hash_iscsi_con *hash_con = NULL;
1113
1114        if (!(cdev->flags & QED_FLAG_STORAGE_STARTED))
1115                return NULL;
1116
1117        hash_for_each_possible(cdev->connections, hash_con, node, handle) {
1118                if (hash_con->con->icid == handle)
1119                        break;
1120        }
1121
1122        if (!hash_con || (hash_con->con->icid != handle))
1123                return NULL;
1124
1125        return hash_con;
1126}
1127
1128static int qed_iscsi_stop(struct qed_dev *cdev)
1129{
1130        int rc;
1131
1132        if (!(cdev->flags & QED_FLAG_STORAGE_STARTED)) {
1133                DP_NOTICE(cdev, "iscsi already stopped\n");
1134                return 0;
1135        }
1136
1137        if (!hash_empty(cdev->connections)) {
1138                DP_NOTICE(cdev,
1139                          "Can't stop iscsi - not all connections were returned\n");
1140                return -EINVAL;
1141        }
1142
1143        /* Stop the iscsi */
1144        rc = qed_sp_iscsi_func_stop(QED_LEADING_HWFN(cdev),
1145                                    QED_SPQ_MODE_EBLOCK, NULL);
1146        cdev->flags &= ~QED_FLAG_STORAGE_STARTED;
1147
1148        return rc;
1149}
1150
1151static int qed_iscsi_start(struct qed_dev *cdev,
1152                           struct qed_iscsi_tid *tasks,
1153                           void *event_context,
1154                           iscsi_event_cb_t async_event_cb)
1155{
1156        int rc;
1157        struct qed_tid_mem *tid_info;
1158
1159        if (cdev->flags & QED_FLAG_STORAGE_STARTED) {
1160                DP_NOTICE(cdev, "iscsi already started;\n");
1161                return 0;
1162        }
1163
1164        rc = qed_sp_iscsi_func_start(QED_LEADING_HWFN(cdev),
1165                                     QED_SPQ_MODE_EBLOCK, NULL, event_context,
1166                                     async_event_cb);
1167        if (rc) {
1168                DP_NOTICE(cdev, "Failed to start iscsi\n");
1169                return rc;
1170        }
1171
1172        cdev->flags |= QED_FLAG_STORAGE_STARTED;
1173        hash_init(cdev->connections);
1174
1175        if (!tasks)
1176                return 0;
1177
1178        tid_info = kzalloc(sizeof(*tid_info), GFP_KERNEL);
1179
1180        if (!tid_info) {
1181                qed_iscsi_stop(cdev);
1182                return -ENOMEM;
1183        }
1184
1185        rc = qed_cxt_get_tid_mem_info(QED_LEADING_HWFN(cdev),
1186                                      tid_info);
1187        if (rc) {
1188                DP_NOTICE(cdev, "Failed to gather task information\n");
1189                qed_iscsi_stop(cdev);
1190                kfree(tid_info);
1191                return rc;
1192        }
1193
1194        /* Fill task information */
1195        tasks->size = tid_info->tid_size;
1196        tasks->num_tids_per_block = tid_info->num_tids_per_block;
1197        memcpy(tasks->blocks, tid_info->blocks,
1198               MAX_TID_BLOCKS_ISCSI * sizeof(u8 *));
1199
1200        kfree(tid_info);
1201
1202        return 0;
1203}
1204
1205static int qed_iscsi_acquire_conn(struct qed_dev *cdev,
1206                                  u32 *handle,
1207                                  u32 *fw_cid, void __iomem **p_doorbell)
1208{
1209        struct qed_hash_iscsi_con *hash_con;
1210        int rc;
1211
1212        /* Allocate a hashed connection */
1213        hash_con = kzalloc(sizeof(*hash_con), GFP_ATOMIC);
1214        if (!hash_con)
1215                return -ENOMEM;
1216
1217        /* Acquire the connection */
1218        rc = qed_iscsi_acquire_connection(QED_LEADING_HWFN(cdev), NULL,
1219                                          &hash_con->con);
1220        if (rc) {
1221                DP_NOTICE(cdev, "Failed to acquire Connection\n");
1222                kfree(hash_con);
1223                return rc;
1224        }
1225
1226        /* Added the connection to hash table */
1227        *handle = hash_con->con->icid;
1228        *fw_cid = hash_con->con->fw_cid;
1229        hash_add(cdev->connections, &hash_con->node, *handle);
1230
1231        if (p_doorbell)
1232                *p_doorbell = qed_iscsi_get_db_addr(QED_LEADING_HWFN(cdev),
1233                                                    *handle);
1234
1235        return 0;
1236}
1237
1238static int qed_iscsi_release_conn(struct qed_dev *cdev, u32 handle)
1239{
1240        struct qed_hash_iscsi_con *hash_con;
1241
1242        hash_con = qed_iscsi_get_hash(cdev, handle);
1243        if (!hash_con) {
1244                DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
1245                          handle);
1246                return -EINVAL;
1247        }
1248
1249        hlist_del(&hash_con->node);
1250        qed_iscsi_release_connection(QED_LEADING_HWFN(cdev), hash_con->con);
1251        kfree(hash_con);
1252
1253        return 0;
1254}
1255
1256static int qed_iscsi_offload_conn(struct qed_dev *cdev,
1257                                  u32 handle,
1258                                  struct qed_iscsi_params_offload *conn_info)
1259{
1260        struct qed_hash_iscsi_con *hash_con;
1261        struct qed_iscsi_conn *con;
1262
1263        hash_con = qed_iscsi_get_hash(cdev, handle);
1264        if (!hash_con) {
1265                DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
1266                          handle);
1267                return -EINVAL;
1268        }
1269
1270        /* Update the connection with information from the params */
1271        con = hash_con->con;
1272
1273        ether_addr_copy(con->local_mac, conn_info->src.mac);
1274        ether_addr_copy(con->remote_mac, conn_info->dst.mac);
1275        memcpy(con->local_ip, conn_info->src.ip, sizeof(con->local_ip));
1276        memcpy(con->remote_ip, conn_info->dst.ip, sizeof(con->remote_ip));
1277        con->local_port = conn_info->src.port;
1278        con->remote_port = conn_info->dst.port;
1279
1280        con->layer_code = conn_info->layer_code;
1281        con->sq_pbl_addr = conn_info->sq_pbl_addr;
1282        con->initial_ack = conn_info->initial_ack;
1283        con->vlan_id = conn_info->vlan_id;
1284        con->tcp_flags = conn_info->tcp_flags;
1285        con->ip_version = conn_info->ip_version;
1286        con->default_cq = conn_info->default_cq;
1287        con->ka_max_probe_cnt = conn_info->ka_max_probe_cnt;
1288        con->dup_ack_theshold = conn_info->dup_ack_theshold;
1289        con->rcv_next = conn_info->rcv_next;
1290        con->snd_una = conn_info->snd_una;
1291        con->snd_next = conn_info->snd_next;
1292        con->snd_max = conn_info->snd_max;
1293        con->snd_wnd = conn_info->snd_wnd;
1294        con->rcv_wnd = conn_info->rcv_wnd;
1295        con->snd_wl1 = conn_info->snd_wl1;
1296        con->cwnd = conn_info->cwnd;
1297        con->ss_thresh = conn_info->ss_thresh;
1298        con->srtt = conn_info->srtt;
1299        con->rtt_var = conn_info->rtt_var;
1300        con->ts_recent = conn_info->ts_recent;
1301        con->ts_recent_age = conn_info->ts_recent_age;
1302        con->total_rt = conn_info->total_rt;
1303        con->ka_timeout_delta = conn_info->ka_timeout_delta;
1304        con->rt_timeout_delta = conn_info->rt_timeout_delta;
1305        con->dup_ack_cnt = conn_info->dup_ack_cnt;
1306        con->snd_wnd_probe_cnt = conn_info->snd_wnd_probe_cnt;
1307        con->ka_probe_cnt = conn_info->ka_probe_cnt;
1308        con->rt_cnt = conn_info->rt_cnt;
1309        con->flow_label = conn_info->flow_label;
1310        con->ka_timeout = conn_info->ka_timeout;
1311        con->ka_interval = conn_info->ka_interval;
1312        con->max_rt_time = conn_info->max_rt_time;
1313        con->initial_rcv_wnd = conn_info->initial_rcv_wnd;
1314        con->ttl = conn_info->ttl;
1315        con->tos_or_tc = conn_info->tos_or_tc;
1316        con->remote_port = conn_info->remote_port;
1317        con->local_port = conn_info->local_port;
1318        con->mss = conn_info->mss;
1319        con->snd_wnd_scale = conn_info->snd_wnd_scale;
1320        con->rcv_wnd_scale = conn_info->rcv_wnd_scale;
1321        con->da_timeout_value = conn_info->da_timeout_value;
1322        con->ack_frequency = conn_info->ack_frequency;
1323
1324        /* Set default values on other connection fields */
1325        con->offl_flags = 0x1;
1326
1327        return qed_sp_iscsi_conn_offload(QED_LEADING_HWFN(cdev), con,
1328                                         QED_SPQ_MODE_EBLOCK, NULL);
1329}
1330
1331static int qed_iscsi_update_conn(struct qed_dev *cdev,
1332                                 u32 handle,
1333                                 struct qed_iscsi_params_update *conn_info)
1334{
1335        struct qed_hash_iscsi_con *hash_con;
1336        struct qed_iscsi_conn *con;
1337
1338        hash_con = qed_iscsi_get_hash(cdev, handle);
1339        if (!hash_con) {
1340                DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
1341                          handle);
1342                return -EINVAL;
1343        }
1344
1345        /* Update the connection with information from the params */
1346        con = hash_con->con;
1347        con->update_flag = conn_info->update_flag;
1348        con->max_seq_size = conn_info->max_seq_size;
1349        con->max_recv_pdu_length = conn_info->max_recv_pdu_length;
1350        con->max_send_pdu_length = conn_info->max_send_pdu_length;
1351        con->first_seq_length = conn_info->first_seq_length;
1352        con->exp_stat_sn = conn_info->exp_stat_sn;
1353
1354        return qed_sp_iscsi_conn_update(QED_LEADING_HWFN(cdev), con,
1355                                        QED_SPQ_MODE_EBLOCK, NULL);
1356}
1357
1358static int qed_iscsi_clear_conn_sq(struct qed_dev *cdev, u32 handle)
1359{
1360        struct qed_hash_iscsi_con *hash_con;
1361
1362        hash_con = qed_iscsi_get_hash(cdev, handle);
1363        if (!hash_con) {
1364                DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
1365                          handle);
1366                return -EINVAL;
1367        }
1368
1369        return qed_sp_iscsi_conn_clear_sq(QED_LEADING_HWFN(cdev),
1370                                          hash_con->con,
1371                                          QED_SPQ_MODE_EBLOCK, NULL);
1372}
1373
1374static int qed_iscsi_destroy_conn(struct qed_dev *cdev,
1375                                  u32 handle, u8 abrt_conn)
1376{
1377        struct qed_hash_iscsi_con *hash_con;
1378
1379        hash_con = qed_iscsi_get_hash(cdev, handle);
1380        if (!hash_con) {
1381                DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
1382                          handle);
1383                return -EINVAL;
1384        }
1385
1386        hash_con->con->abortive_dsconnect = abrt_conn;
1387
1388        return qed_sp_iscsi_conn_terminate(QED_LEADING_HWFN(cdev),
1389                                           hash_con->con,
1390                                           QED_SPQ_MODE_EBLOCK, NULL);
1391}
1392
1393static int qed_iscsi_stats(struct qed_dev *cdev, struct qed_iscsi_stats *stats)
1394{
1395        return qed_iscsi_get_stats(QED_LEADING_HWFN(cdev), stats);
1396}
1397
1398static int qed_iscsi_change_mac(struct qed_dev *cdev,
1399                                u32 handle, const u8 *mac)
1400{
1401        struct qed_hash_iscsi_con *hash_con;
1402
1403        hash_con = qed_iscsi_get_hash(cdev, handle);
1404        if (!hash_con) {
1405                DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
1406                          handle);
1407                return -EINVAL;
1408        }
1409
1410        return qed_sp_iscsi_mac_update(QED_LEADING_HWFN(cdev),
1411                                       hash_con->con,
1412                                       QED_SPQ_MODE_EBLOCK, NULL);
1413}
1414
1415void qed_get_protocol_stats_iscsi(struct qed_dev *cdev,
1416                                  struct qed_mcp_iscsi_stats *stats)
1417{
1418        struct qed_iscsi_stats proto_stats;
1419
1420        /* Retrieve FW statistics */
1421        memset(&proto_stats, 0, sizeof(proto_stats));
1422        if (qed_iscsi_stats(cdev, &proto_stats)) {
1423                DP_VERBOSE(cdev, QED_MSG_STORAGE,
1424                           "Failed to collect ISCSI statistics\n");
1425                return;
1426        }
1427
1428        /* Translate FW statistics into struct */
1429        stats->rx_pdus = proto_stats.iscsi_rx_total_pdu_cnt;
1430        stats->tx_pdus = proto_stats.iscsi_tx_total_pdu_cnt;
1431        stats->rx_bytes = proto_stats.iscsi_rx_bytes_cnt;
1432        stats->tx_bytes = proto_stats.iscsi_tx_bytes_cnt;
1433}
1434
1435static const struct qed_iscsi_ops qed_iscsi_ops_pass = {
1436        .common = &qed_common_ops_pass,
1437        .ll2 = &qed_ll2_ops_pass,
1438        .fill_dev_info = &qed_fill_iscsi_dev_info,
1439        .register_ops = &qed_register_iscsi_ops,
1440        .start = &qed_iscsi_start,
1441        .stop = &qed_iscsi_stop,
1442        .acquire_conn = &qed_iscsi_acquire_conn,
1443        .release_conn = &qed_iscsi_release_conn,
1444        .offload_conn = &qed_iscsi_offload_conn,
1445        .update_conn = &qed_iscsi_update_conn,
1446        .destroy_conn = &qed_iscsi_destroy_conn,
1447        .clear_sq = &qed_iscsi_clear_conn_sq,
1448        .get_stats = &qed_iscsi_stats,
1449        .change_mac = &qed_iscsi_change_mac,
1450};
1451
1452const struct qed_iscsi_ops *qed_get_iscsi_ops(void)
1453{
1454        return &qed_iscsi_ops_pass;
1455}
1456EXPORT_SYMBOL(qed_get_iscsi_ops);
1457
1458void qed_put_iscsi_ops(void)
1459{
1460}
1461EXPORT_SYMBOL(qed_put_iscsi_ops);
1462