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

   1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
   2 /* Copyright 2021 Marvell. All rights reserved. */
   3
   4 #include <linux/types.h>
   5 #include <asm/byteorder.h>
   6 #include <asm/param.h>
   7 #include <linux/delay.h>
   8 #include <linux/dma-mapping.h>
   9 #include <linux/etherdevice.h>
  10 #include <linux/kernel.h>
  11 #include <linux/log2.h>
  12 #include <linux/module.h>
  13 #include <linux/pci.h>
  14 #include <linux/stddef.h>
  15 #include <linux/string.h>
  16 #include <linux/errno.h>
  17 #include <linux/list.h>
  18 #include <linux/qed/qed_nvmetcp_if.h>
  19 #include "qed.h"
  20 #include "qed_cxt.h"
  21 #include "qed_dev_api.h"
  22 #include "qed_hsi.h"
  23 #include "qed_hw.h"
  24 #include "qed_int.h"
  25 #include "qed_nvmetcp.h"
  26 #include "qed_ll2.h"
  27 #include "qed_mcp.h"
  28 #include "qed_sp.h"
  29 #include "qed_reg_addr.h"
  30 #include "qed_nvmetcp_fw_funcs.h"
  31
  32 static int qed_nvmetcp_async_event(struct qed_hwfn *p_hwfn, u8 fw_event_code,
  33                                    u16 echo, union event_ring_data *data,
  34                                    u8 fw_return_code)
  35 {
  36         if (p_hwfn->p_nvmetcp_info->event_cb) {
  37                 struct qed_nvmetcp_info *p_nvmetcp = p_hwfn->p_nvmetcp_info;
  38
  39                 return p_nvmetcp->event_cb(p_nvmetcp->event_context,
  40                                          fw_event_code, data);
  41         } else {
  42                 DP_NOTICE(p_hwfn, "nvmetcp async completion is not set\n");
  43
  44                 return -EINVAL;
  45         }
  46 }
  47
  48 static int qed_sp_nvmetcp_func_start(struct qed_hwfn *p_hwfn,
  49                                      enum spq_mode comp_mode,
  50                                      struct qed_spq_comp_cb *p_comp_addr,
  51                                      void *event_context,
  52                                      nvmetcp_event_cb_t async_event_cb)
  53 {
  54         struct nvmetcp_init_ramrod_params *p_ramrod = NULL;
  55         struct qed_nvmetcp_pf_params *p_params = NULL;
  56         struct scsi_init_func_queues *p_queue = NULL;
  57         struct nvmetcp_spe_func_init *p_init = NULL;
  58         struct qed_sp_init_data init_data = {};
  59         struct qed_spq_entry *p_ent = NULL;
  60         int rc = 0;
  61         u16 val;
  62         u8 i;
  63
  64         /* Get SPQ entry */
  65         init_data.cid = qed_spq_get_cid(p_hwfn);
  66         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
  67         init_data.comp_mode = comp_mode;
  68         init_data.p_comp_data = p_comp_addr;
  69         rc = qed_sp_init_request(p_hwfn, &p_ent,
  70                                  NVMETCP_RAMROD_CMD_ID_INIT_FUNC,
  71                                  PROTOCOLID_TCP_ULP, &init_data);
  72         if (rc)
  73                 return rc;
  74
  75         p_ramrod = &p_ent->ramrod.nvmetcp_init;
  76         p_init = &p_ramrod->nvmetcp_init_spe;
  77         p_params = &p_hwfn->pf_params.nvmetcp_pf_params;
  78         p_queue = &p_init->q_params;
  79         p_init->num_sq_pages_in_ring = p_params->num_sq_pages_in_ring;
  80         p_init->num_r2tq_pages_in_ring = p_params->num_r2tq_pages_in_ring;
  81         p_init->num_uhq_pages_in_ring = p_params->num_uhq_pages_in_ring;
  82         p_init->ll2_rx_queue_id = RESC_START(p_hwfn, QED_LL2_RAM_QUEUE) +
  83                                         p_params->ll2_ooo_queue_id;
  84         SET_FIELD(p_init->flags, NVMETCP_SPE_FUNC_INIT_NVMETCP_MODE, 1);
  85         p_init->func_params.log_page_size = ilog2(PAGE_SIZE);
  86         p_init->func_params.num_tasks = cpu_to_le16(p_params->num_tasks);
  87         p_init->debug_flags = p_params->debug_mode;
  88         DMA_REGPAIR_LE(p_queue->glbl_q_params_addr,
  89                        p_params->glbl_q_params_addr);
  90         p_queue->cq_num_entries = cpu_to_le16(QED_NVMETCP_FW_CQ_SIZE);
  91         p_queue->num_queues = p_params->num_queues;
  92         val = RESC_START(p_hwfn, QED_CMDQS_CQS);
  93         p_queue->queue_relative_offset = cpu_to_le16((u16)val);
  94         p_queue->cq_sb_pi = p_params->gl_rq_pi;
  95
  96         for (i = 0; i < p_params->num_queues; i++) {
  97                 val = qed_get_igu_sb_id(p_hwfn, i);
  98                 p_queue->cq_cmdq_sb_num_arr[i] = cpu_to_le16(val);
  99         }
 100
 101         SET_FIELD(p_queue->q_validity,
 102                   SCSI_INIT_FUNC_QUEUES_CMD_VALID, 0);
 103         p_queue->cmdq_num_entries = 0;
 104         p_queue->bdq_resource_id = (u8)RESC_START(p_hwfn, QED_BDQ);
 105         p_ramrod->tcp_init.two_msl_timer = cpu_to_le32(QED_TCP_TWO_MSL_TIMER);
 106         p_ramrod->tcp_init.tx_sws_timer = cpu_to_le16(QED_TCP_SWS_TIMER);
 107         p_init->half_way_close_timeout = cpu_to_le16(QED_TCP_HALF_WAY_CLOSE_TIMEOUT);
 108         p_ramrod->tcp_init.max_fin_rt = QED_TCP_MAX_FIN_RT;
 109         SET_FIELD(p_ramrod->nvmetcp_init_spe.params,
 110                   NVMETCP_SPE_FUNC_INIT_MAX_SYN_RT, QED_TCP_MAX_FIN_RT);
 111         p_hwfn->p_nvmetcp_info->event_context = event_context;
 112         p_hwfn->p_nvmetcp_info->event_cb = async_event_cb;
 113         qed_spq_register_async_cb(p_hwfn, PROTOCOLID_TCP_ULP,
 114                                   qed_nvmetcp_async_event);
 115
 116         return qed_spq_post(p_hwfn, p_ent, NULL);
 117 }
 118
 119 static int qed_sp_nvmetcp_func_stop(struct qed_hwfn *p_hwfn,
 120                                     enum spq_mode comp_mode,
 121                                     struct qed_spq_comp_cb *p_comp_addr)
 122 {
 123         struct qed_spq_entry *p_ent = NULL;
 124         struct qed_sp_init_data init_data;
 125         int rc;
 126
 127         /* Get SPQ entry */
 128         memset(&init_data, 0, sizeof(init_data));
 129         init_data.cid = qed_spq_get_cid(p_hwfn);
 130         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 131         init_data.comp_mode = comp_mode;
 132         init_data.p_comp_data = p_comp_addr;
 133         rc = qed_sp_init_request(p_hwfn, &p_ent,
 134                                  NVMETCP_RAMROD_CMD_ID_DESTROY_FUNC,
 135                                  PROTOCOLID_TCP_ULP, &init_data);
 136         if (rc)
 137                 return rc;
 138
 139         rc = qed_spq_post(p_hwfn, p_ent, NULL);
 140         qed_spq_unregister_async_cb(p_hwfn, PROTOCOLID_TCP_ULP);
 141
 142         return rc;
 143 }
 144
 145 static int qed_fill_nvmetcp_dev_info(struct qed_dev *cdev,
 146                                      struct qed_dev_nvmetcp_info *info)
 147 {
 148         struct qed_hwfn *hwfn = QED_AFFIN_HWFN(cdev);
 149         int rc;
 150
 151         memset(info, 0, sizeof(*info));
 152         rc = qed_fill_dev_info(cdev, &info->common);
 153         info->port_id = MFW_PORT(hwfn);
 154         info->num_cqs = FEAT_NUM(hwfn, QED_NVMETCP_CQ);
 155
 156         return rc;
 157 }
 158
 159 static void qed_register_nvmetcp_ops(struct qed_dev *cdev,
 160                                      struct qed_nvmetcp_cb_ops *ops,
 161                                      void *cookie)
 162 {
 163         cdev->protocol_ops.nvmetcp = ops;
 164         cdev->ops_cookie = cookie;
 165 }
 166
 167 static int qed_nvmetcp_stop(struct qed_dev *cdev)
 168 {
 169         int rc;
 170
 171         if (!(cdev->flags & QED_FLAG_STORAGE_STARTED)) {
 172                 DP_NOTICE(cdev, "nvmetcp already stopped\n");
 173
 174                 return 0;
 175         }
 176
 177         if (!hash_empty(cdev->connections)) {
 178                 DP_NOTICE(cdev,
 179                           "Can't stop nvmetcp - not all connections were returned\n");
 180
 181                 return -EINVAL;
 182         }
 183
 184         /* Stop the nvmetcp */
 185         rc = qed_sp_nvmetcp_func_stop(QED_AFFIN_HWFN(cdev), QED_SPQ_MODE_EBLOCK,
 186                                       NULL);
 187         cdev->flags &= ~QED_FLAG_STORAGE_STARTED;
 188
 189         return rc;
 190 }
 191
 192 static int qed_nvmetcp_start(struct qed_dev *cdev,
 193                              struct qed_nvmetcp_tid *tasks,
 194                              void *event_context,
 195                              nvmetcp_event_cb_t async_event_cb)
 196 {
 197         struct qed_tid_mem *tid_info;
 198         int rc;
 199
 200         if (cdev->flags & QED_FLAG_STORAGE_STARTED) {
 201                 DP_NOTICE(cdev, "nvmetcp already started;\n");
 202
 203                 return 0;
 204         }
 205
 206         rc = qed_sp_nvmetcp_func_start(QED_AFFIN_HWFN(cdev),
 207                                        QED_SPQ_MODE_EBLOCK, NULL,
 208                                        event_context, async_event_cb);
 209         if (rc) {
 210                 DP_NOTICE(cdev, "Failed to start nvmetcp\n");
 211
 212                 return rc;
 213         }
 214
 215         cdev->flags |= QED_FLAG_STORAGE_STARTED;
 216         hash_init(cdev->connections);
 217
 218         if (!tasks)
 219                 return 0;
 220
 221         tid_info = kzalloc(sizeof(*tid_info), GFP_KERNEL);
 222         if (!tid_info) {
 223                 qed_nvmetcp_stop(cdev);
 224
 225                 return -ENOMEM;
 226         }
 227
 228         rc = qed_cxt_get_tid_mem_info(QED_AFFIN_HWFN(cdev), tid_info);
 229         if (rc) {
 230                 DP_NOTICE(cdev, "Failed to gather task information\n");
 231                 qed_nvmetcp_stop(cdev);
 232                 kfree(tid_info);
 233
 234                 return rc;
 235         }
 236
 237         /* Fill task information */
 238         tasks->size = tid_info->tid_size;
 239         tasks->num_tids_per_block = tid_info->num_tids_per_block;
 240         memcpy(tasks->blocks, tid_info->blocks,
 241                MAX_TID_BLOCKS_NVMETCP * sizeof(u8 *));
 242         kfree(tid_info);
 243
 244         return 0;
 245 }
 246
 247 static struct qed_hash_nvmetcp_con *qed_nvmetcp_get_hash(struct qed_dev *cdev,
 248                                                          u32 handle)
 249 {
 250         struct qed_hash_nvmetcp_con *hash_con = NULL;
 251
 252         if (!(cdev->flags & QED_FLAG_STORAGE_STARTED))
 253                 return NULL;
 254
 255         hash_for_each_possible(cdev->connections, hash_con, node, handle) {
 256                 if (hash_con->con->icid == handle)
 257                         break;
 258         }
 259
 260         if (!hash_con || hash_con->con->icid != handle)
 261                 return NULL;
 262
 263         return hash_con;
 264 }
 265
 266 static int qed_sp_nvmetcp_conn_offload(struct qed_hwfn *p_hwfn,
 267                                        struct qed_nvmetcp_conn *p_conn,
 268                                        enum spq_mode comp_mode,
 269                                        struct qed_spq_comp_cb *p_comp_addr)
 270 {
 271         struct nvmetcp_spe_conn_offload *p_ramrod = NULL;
 272         struct tcp_offload_params_opt2 *p_tcp = NULL;
 273         struct qed_sp_init_data init_data = { 0 };
 274         struct qed_spq_entry *p_ent = NULL;
 275         dma_addr_t r2tq_pbl_addr;
 276         dma_addr_t xhq_pbl_addr;
 277         dma_addr_t uhq_pbl_addr;
 278         u16 physical_q;
 279         int rc = 0;
 280         u8 i;
 281
 282         /* Get SPQ entry */
 283         init_data.cid = p_conn->icid;
 284         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 285         init_data.comp_mode = comp_mode;
 286         init_data.p_comp_data = p_comp_addr;
 287         rc = qed_sp_init_request(p_hwfn, &p_ent,
 288                                  NVMETCP_RAMROD_CMD_ID_OFFLOAD_CONN,
 289                                  PROTOCOLID_TCP_ULP, &init_data);
 290         if (rc)
 291                 return rc;
 292
 293         p_ramrod = &p_ent->ramrod.nvmetcp_conn_offload;
 294
 295         /* Transmission PQ is the first of the PF */
 296         physical_q = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);
 297         p_conn->physical_q0 = cpu_to_le16(physical_q);
 298         p_ramrod->nvmetcp.physical_q0 = cpu_to_le16(physical_q);
 299
 300         /* nvmetcp Pure-ACK PQ */
 301         physical_q = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_ACK);
 302         p_conn->physical_q1 = cpu_to_le16(physical_q);
 303         p_ramrod->nvmetcp.physical_q1 = cpu_to_le16(physical_q);
 304         p_ramrod->conn_id = cpu_to_le16(p_conn->conn_id);
 305         DMA_REGPAIR_LE(p_ramrod->nvmetcp.sq_pbl_addr, p_conn->sq_pbl_addr);
 306         r2tq_pbl_addr = qed_chain_get_pbl_phys(&p_conn->r2tq);
 307         DMA_REGPAIR_LE(p_ramrod->nvmetcp.r2tq_pbl_addr, r2tq_pbl_addr);
 308         xhq_pbl_addr = qed_chain_get_pbl_phys(&p_conn->xhq);
 309         DMA_REGPAIR_LE(p_ramrod->nvmetcp.xhq_pbl_addr, xhq_pbl_addr);
 310         uhq_pbl_addr = qed_chain_get_pbl_phys(&p_conn->uhq);
 311         DMA_REGPAIR_LE(p_ramrod->nvmetcp.uhq_pbl_addr, uhq_pbl_addr);
 312         p_ramrod->nvmetcp.flags = p_conn->offl_flags;
 313         p_ramrod->nvmetcp.default_cq = p_conn->default_cq;
 314         p_ramrod->nvmetcp.initial_ack = 0;
 315         DMA_REGPAIR_LE(p_ramrod->nvmetcp.nvmetcp.cccid_itid_table_addr,
 316                        p_conn->nvmetcp_cccid_itid_table_addr);
 317         p_ramrod->nvmetcp.nvmetcp.cccid_max_range =
 318                  cpu_to_le16(p_conn->nvmetcp_cccid_max_range);
 319         p_tcp = &p_ramrod->tcp;
 320         qed_set_fw_mac_addr(&p_tcp->remote_mac_addr_hi,
 321                             &p_tcp->remote_mac_addr_mid,
 322                             &p_tcp->remote_mac_addr_lo, p_conn->remote_mac);
 323         qed_set_fw_mac_addr(&p_tcp->local_mac_addr_hi,
 324                             &p_tcp->local_mac_addr_mid,
 325                             &p_tcp->local_mac_addr_lo, p_conn->local_mac);
 326         p_tcp->vlan_id = cpu_to_le16(p_conn->vlan_id);
 327         p_tcp->flags = cpu_to_le16(p_conn->tcp_flags);
 328         p_tcp->ip_version = p_conn->ip_version;
 329         if (p_tcp->ip_version == TCP_IPV6) {
 330                 for (i = 0; i < 4; i++) {
 331                         p_tcp->remote_ip[i] = cpu_to_le32(p_conn->remote_ip[i]);
 332                         p_tcp->local_ip[i] = cpu_to_le32(p_conn->local_ip[i]);
 333                 }
 334         } else {
 335                 p_tcp->remote_ip[0] = cpu_to_le32(p_conn->remote_ip[0]);
 336                 p_tcp->local_ip[0] = cpu_to_le32(p_conn->local_ip[0]);
 337         }
 338
 339         p_tcp->flow_label = cpu_to_le32(p_conn->flow_label);
 340         p_tcp->ttl = p_conn->ttl;
 341         p_tcp->tos_or_tc = p_conn->tos_or_tc;
 342         p_tcp->remote_port = cpu_to_le16(p_conn->remote_port);
 343         p_tcp->local_port = cpu_to_le16(p_conn->local_port);
 344         p_tcp->mss = cpu_to_le16(p_conn->mss);
 345         p_tcp->rcv_wnd_scale = p_conn->rcv_wnd_scale;
 346         p_tcp->connect_mode = p_conn->connect_mode;
 347         p_tcp->cwnd = cpu_to_le32(p_conn->cwnd);
 348         p_tcp->ka_max_probe_cnt = p_conn->ka_max_probe_cnt;
 349         p_tcp->ka_timeout = cpu_to_le32(p_conn->ka_timeout);
 350         p_tcp->max_rt_time = cpu_to_le32(p_conn->max_rt_time);
 351         p_tcp->ka_interval = cpu_to_le32(p_conn->ka_interval);
 352
 353         return qed_spq_post(p_hwfn, p_ent, NULL);
 354 }
 355
 356 static int qed_sp_nvmetcp_conn_update(struct qed_hwfn *p_hwfn,
 357                                       struct qed_nvmetcp_conn *p_conn,
 358                                       enum spq_mode comp_mode,
 359                                       struct qed_spq_comp_cb *p_comp_addr)
 360 {
 361         struct nvmetcp_conn_update_ramrod_params *p_ramrod = NULL;
 362         struct qed_spq_entry *p_ent = NULL;
 363         struct qed_sp_init_data init_data;
 364         int rc = -EINVAL;
 365         u32 dval;
 366
 367         /* Get SPQ entry */
 368         memset(&init_data, 0, sizeof(init_data));
 369         init_data.cid = p_conn->icid;
 370         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 371         init_data.comp_mode = comp_mode;
 372         init_data.p_comp_data = p_comp_addr;
 373
 374         rc = qed_sp_init_request(p_hwfn, &p_ent,
 375                                  NVMETCP_RAMROD_CMD_ID_UPDATE_CONN,
 376                                  PROTOCOLID_TCP_ULP, &init_data);
 377         if (rc)
 378                 return rc;
 379
 380         p_ramrod = &p_ent->ramrod.nvmetcp_conn_update;
 381         p_ramrod->conn_id = cpu_to_le16(p_conn->conn_id);
 382         p_ramrod->flags = p_conn->update_flag;
 383         p_ramrod->max_seq_size = cpu_to_le32(p_conn->max_seq_size);
 384         dval = p_conn->max_recv_pdu_length;
 385         p_ramrod->max_recv_pdu_length = cpu_to_le32(dval);
 386         dval = p_conn->max_send_pdu_length;
 387         p_ramrod->max_send_pdu_length = cpu_to_le32(dval);
 388         p_ramrod->first_seq_length = cpu_to_le32(p_conn->first_seq_length);
 389
 390         return qed_spq_post(p_hwfn, p_ent, NULL);
 391 }
 392
 393 static int qed_sp_nvmetcp_conn_terminate(struct qed_hwfn *p_hwfn,
 394                                          struct qed_nvmetcp_conn *p_conn,
 395                                          enum spq_mode comp_mode,
 396                                          struct qed_spq_comp_cb *p_comp_addr)
 397 {
 398         struct nvmetcp_spe_conn_termination *p_ramrod = NULL;
 399         struct qed_spq_entry *p_ent = NULL;
 400         struct qed_sp_init_data init_data;
 401         int rc = -EINVAL;
 402
 403         /* Get SPQ entry */
 404         memset(&init_data, 0, sizeof(init_data));
 405         init_data.cid = p_conn->icid;
 406         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 407         init_data.comp_mode = comp_mode;
 408         init_data.p_comp_data = p_comp_addr;
 409         rc = qed_sp_init_request(p_hwfn, &p_ent,
 410                                  NVMETCP_RAMROD_CMD_ID_TERMINATION_CONN,
 411                                  PROTOCOLID_TCP_ULP, &init_data);
 412         if (rc)
 413                 return rc;
 414
 415         p_ramrod = &p_ent->ramrod.nvmetcp_conn_terminate;
 416         p_ramrod->conn_id = cpu_to_le16(p_conn->conn_id);
 417         p_ramrod->abortive = p_conn->abortive_dsconnect;
 418
 419         return qed_spq_post(p_hwfn, p_ent, NULL);
 420 }
 421
 422 static int qed_sp_nvmetcp_conn_clear_sq(struct qed_hwfn *p_hwfn,
 423                                         struct qed_nvmetcp_conn *p_conn,
 424                                         enum spq_mode comp_mode,
 425                                         struct qed_spq_comp_cb *p_comp_addr)
 426 {
 427         struct qed_spq_entry *p_ent = NULL;
 428         struct qed_sp_init_data init_data;
 429         int rc = -EINVAL;
 430
 431         /* Get SPQ entry */
 432         memset(&init_data, 0, sizeof(init_data));
 433         init_data.cid = p_conn->icid;
 434         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 435         init_data.comp_mode = comp_mode;
 436         init_data.p_comp_data = p_comp_addr;
 437         rc = qed_sp_init_request(p_hwfn, &p_ent,
 438                                  NVMETCP_RAMROD_CMD_ID_CLEAR_SQ,
 439                                  PROTOCOLID_TCP_ULP, &init_data);
 440         if (rc)
 441                 return rc;
 442
 443         return qed_spq_post(p_hwfn, p_ent, NULL);
 444 }
 445
 446 static void __iomem *qed_nvmetcp_get_db_addr(struct qed_hwfn *p_hwfn, u32 cid)
 447 {
 448         return (u8 __iomem *)p_hwfn->doorbells +
 449                              qed_db_addr(cid, DQ_DEMS_LEGACY);
 450 }
 451
 452 static int qed_nvmetcp_allocate_connection(struct qed_hwfn *p_hwfn,
 453                                            struct qed_nvmetcp_conn **p_out_conn)
 454 {
 455         struct qed_chain_init_params params = {
 456                 .mode           = QED_CHAIN_MODE_PBL,
 457                 .intended_use   = QED_CHAIN_USE_TO_CONSUME_PRODUCE,
 458                 .cnt_type       = QED_CHAIN_CNT_TYPE_U16,
 459         };
 460         struct qed_nvmetcp_pf_params *p_params = NULL;
 461         struct qed_nvmetcp_conn *p_conn = NULL;
 462         int rc = 0;
 463
 464         /* Try finding a free connection that can be used */
 465         spin_lock_bh(&p_hwfn->p_nvmetcp_info->lock);
 466         if (!list_empty(&p_hwfn->p_nvmetcp_info->free_list))
 467                 p_conn = list_first_entry(&p_hwfn->p_nvmetcp_info->free_list,
 468                                           struct qed_nvmetcp_conn, list_entry);
 469         if (p_conn) {
 470                 list_del(&p_conn->list_entry);
 471                 spin_unlock_bh(&p_hwfn->p_nvmetcp_info->lock);
 472                 *p_out_conn = p_conn;
 473
 474                 return 0;
 475         }
 476         spin_unlock_bh(&p_hwfn->p_nvmetcp_info->lock);
 477
 478         /* Need to allocate a new connection */
 479         p_params = &p_hwfn->pf_params.nvmetcp_pf_params;
 480         p_conn = kzalloc(sizeof(*p_conn), GFP_KERNEL);
 481         if (!p_conn)
 482                 return -ENOMEM;
 483
 484         params.num_elems = p_params->num_r2tq_pages_in_ring *
 485                            QED_CHAIN_PAGE_SIZE / sizeof(struct nvmetcp_wqe);
 486         params.elem_size = sizeof(struct nvmetcp_wqe);
 487         rc = qed_chain_alloc(p_hwfn->cdev, &p_conn->r2tq, &params);
 488         if (rc)
 489                 goto nomem_r2tq;
 490
 491         params.num_elems = p_params->num_uhq_pages_in_ring *
 492                            QED_CHAIN_PAGE_SIZE / sizeof(struct iscsi_uhqe);
 493         params.elem_size = sizeof(struct iscsi_uhqe);
 494         rc = qed_chain_alloc(p_hwfn->cdev, &p_conn->uhq, &params);
 495         if (rc)
 496                 goto nomem_uhq;
 497
 498         params.elem_size = sizeof(struct iscsi_xhqe);
 499         rc = qed_chain_alloc(p_hwfn->cdev, &p_conn->xhq, &params);
 500         if (rc)
 501                 goto nomem;
 502
 503         p_conn->free_on_delete = true;
 504         *p_out_conn = p_conn;
 505
 506         return 0;
 507
 508 nomem:
 509         qed_chain_free(p_hwfn->cdev, &p_conn->uhq);
 510 nomem_uhq:
 511         qed_chain_free(p_hwfn->cdev, &p_conn->r2tq);
 512 nomem_r2tq:
 513         kfree(p_conn);
 514
 515         return -ENOMEM;
 516 }
 517
 518 static int qed_nvmetcp_acquire_connection(struct qed_hwfn *p_hwfn,
 519                                           struct qed_nvmetcp_conn **p_out_conn)
 520 {
 521         struct qed_nvmetcp_conn *p_conn = NULL;
 522         int rc = 0;
 523         u32 icid;
 524
 525         spin_lock_bh(&p_hwfn->p_nvmetcp_info->lock);
 526         rc = qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_TCP_ULP, &icid);
 527         spin_unlock_bh(&p_hwfn->p_nvmetcp_info->lock);
 528
 529         if (rc)
 530                 return rc;
 531
 532         rc = qed_nvmetcp_allocate_connection(p_hwfn, &p_conn);
 533         if (rc) {
 534                 spin_lock_bh(&p_hwfn->p_nvmetcp_info->lock);
 535                 qed_cxt_release_cid(p_hwfn, icid);
 536                 spin_unlock_bh(&p_hwfn->p_nvmetcp_info->lock);
 537
 538                 return rc;
 539         }
 540
 541         p_conn->icid = icid;
 542         p_conn->conn_id = (u16)icid;
 543         p_conn->fw_cid = (p_hwfn->hw_info.opaque_fid << 16) | icid;
 544         *p_out_conn = p_conn;
 545
 546         return rc;
 547 }
 548
 549 static void qed_nvmetcp_release_connection(struct qed_hwfn *p_hwfn,
 550                                            struct qed_nvmetcp_conn *p_conn)
 551 {
 552         spin_lock_bh(&p_hwfn->p_nvmetcp_info->lock);
 553         list_add_tail(&p_conn->list_entry, &p_hwfn->p_nvmetcp_info->free_list);
 554         qed_cxt_release_cid(p_hwfn, p_conn->icid);
 555         spin_unlock_bh(&p_hwfn->p_nvmetcp_info->lock);
 556 }
 557
 558 static void qed_nvmetcp_free_connection(struct qed_hwfn *p_hwfn,
 559                                         struct qed_nvmetcp_conn *p_conn)
 560 {
 561         qed_chain_free(p_hwfn->cdev, &p_conn->xhq);
 562         qed_chain_free(p_hwfn->cdev, &p_conn->uhq);
 563         qed_chain_free(p_hwfn->cdev, &p_conn->r2tq);
 564         kfree(p_conn);
 565 }
 566
 567 int qed_nvmetcp_alloc(struct qed_hwfn *p_hwfn)
 568 {
 569         struct qed_nvmetcp_info *p_nvmetcp_info;
 570
 571         p_nvmetcp_info = kzalloc(sizeof(*p_nvmetcp_info), GFP_KERNEL);
 572         if (!p_nvmetcp_info)
 573                 return -ENOMEM;
 574
 575         INIT_LIST_HEAD(&p_nvmetcp_info->free_list);
 576         p_hwfn->p_nvmetcp_info = p_nvmetcp_info;
 577
 578         return 0;
 579 }
 580
 581 void qed_nvmetcp_setup(struct qed_hwfn *p_hwfn)
 582 {
 583         spin_lock_init(&p_hwfn->p_nvmetcp_info->lock);
 584 }
 585
 586 void qed_nvmetcp_free(struct qed_hwfn *p_hwfn)
 587 {
 588         struct qed_nvmetcp_conn *p_conn = NULL;
 589
 590         if (!p_hwfn->p_nvmetcp_info)
 591                 return;
 592
 593         while (!list_empty(&p_hwfn->p_nvmetcp_info->free_list)) {
 594                 p_conn = list_first_entry(&p_hwfn->p_nvmetcp_info->free_list,
 595                                           struct qed_nvmetcp_conn, list_entry);
 596                 if (p_conn) {
 597                         list_del(&p_conn->list_entry);
 598                         qed_nvmetcp_free_connection(p_hwfn, p_conn);
 599                 }
 600         }
 601
 602         kfree(p_hwfn->p_nvmetcp_info);
 603         p_hwfn->p_nvmetcp_info = NULL;
 604 }
 605
 606 static int qed_nvmetcp_acquire_conn(struct qed_dev *cdev,
 607                                     u32 *handle,
 608                                     u32 *fw_cid, void __iomem **p_doorbell)
 609 {
 610         struct qed_hash_nvmetcp_con *hash_con;
 611         int rc;
 612
 613         /* Allocate a hashed connection */
 614         hash_con = kzalloc(sizeof(*hash_con), GFP_ATOMIC);
 615         if (!hash_con)
 616                 return -ENOMEM;
 617
 618         /* Acquire the connection */
 619         rc = qed_nvmetcp_acquire_connection(QED_AFFIN_HWFN(cdev),
 620                                             &hash_con->con);
 621         if (rc) {
 622                 DP_NOTICE(cdev, "Failed to acquire Connection\n");
 623                 kfree(hash_con);
 624
 625                 return rc;
 626         }
 627
 628         /* Added the connection to hash table */
 629         *handle = hash_con->con->icid;
 630         *fw_cid = hash_con->con->fw_cid;
 631         hash_add(cdev->connections, &hash_con->node, *handle);
 632         if (p_doorbell)
 633                 *p_doorbell = qed_nvmetcp_get_db_addr(QED_AFFIN_HWFN(cdev),
 634                                                       *handle);
 635
 636         return 0;
 637 }
 638
 639 static int qed_nvmetcp_release_conn(struct qed_dev *cdev, u32 handle)
 640 {
 641         struct qed_hash_nvmetcp_con *hash_con;
 642
 643         hash_con = qed_nvmetcp_get_hash(cdev, handle);
 644         if (!hash_con) {
 645                 DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
 646                           handle);
 647
 648                 return -EINVAL;
 649         }
 650
 651         hlist_del(&hash_con->node);
 652         qed_nvmetcp_release_connection(QED_AFFIN_HWFN(cdev), hash_con->con);
 653         kfree(hash_con);
 654
 655         return 0;
 656 }
 657
 658 static int qed_nvmetcp_offload_conn(struct qed_dev *cdev, u32 handle,
 659                                     struct qed_nvmetcp_params_offload *conn_info)
 660 {
 661         struct qed_hash_nvmetcp_con *hash_con;
 662         struct qed_nvmetcp_conn *con;
 663
 664         hash_con = qed_nvmetcp_get_hash(cdev, handle);
 665         if (!hash_con) {
 666                 DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
 667                           handle);
 668
 669                 return -EINVAL;
 670         }
 671
 672         /* Update the connection with information from the params */
 673         con = hash_con->con;
 674
 675         /* FW initializations */
 676         con->layer_code = NVMETCP_SLOW_PATH_LAYER_CODE;
 677         con->sq_pbl_addr = conn_info->sq_pbl_addr;
 678         con->nvmetcp_cccid_max_range = conn_info->nvmetcp_cccid_max_range;
 679         con->nvmetcp_cccid_itid_table_addr = conn_info->nvmetcp_cccid_itid_table_addr;
 680         con->default_cq = conn_info->default_cq;
 681         SET_FIELD(con->offl_flags, NVMETCP_CONN_OFFLOAD_PARAMS_TARGET_MODE, 0);
 682         SET_FIELD(con->offl_flags, NVMETCP_CONN_OFFLOAD_PARAMS_NVMETCP_MODE, 1);
 683         SET_FIELD(con->offl_flags, NVMETCP_CONN_OFFLOAD_PARAMS_TCP_ON_CHIP_1B, 1);
 684
 685         /* Networking and TCP stack initializations */
 686         ether_addr_copy(con->local_mac, conn_info->src.mac);
 687         ether_addr_copy(con->remote_mac, conn_info->dst.mac);
 688         memcpy(con->local_ip, conn_info->src.ip, sizeof(con->local_ip));
 689         memcpy(con->remote_ip, conn_info->dst.ip, sizeof(con->remote_ip));
 690         con->local_port = conn_info->src.port;
 691         con->remote_port = conn_info->dst.port;
 692         con->vlan_id = conn_info->vlan_id;
 693
 694         if (conn_info->timestamp_en)
 695                 SET_FIELD(con->tcp_flags, TCP_OFFLOAD_PARAMS_OPT2_TS_EN, 1);
 696
 697         if (conn_info->delayed_ack_en)
 698                 SET_FIELD(con->tcp_flags, TCP_OFFLOAD_PARAMS_OPT2_DA_EN, 1);
 699
 700         if (conn_info->tcp_keep_alive_en)
 701                 SET_FIELD(con->tcp_flags, TCP_OFFLOAD_PARAMS_OPT2_KA_EN, 1);
 702
 703         if (conn_info->ecn_en)
 704                 SET_FIELD(con->tcp_flags, TCP_OFFLOAD_PARAMS_OPT2_ECN_EN, 1);
 705
 706         con->ip_version = conn_info->ip_version;
 707         con->flow_label = QED_TCP_FLOW_LABEL;
 708         con->ka_max_probe_cnt = conn_info->ka_max_probe_cnt;
 709         con->ka_timeout = conn_info->ka_timeout;
 710         con->ka_interval = conn_info->ka_interval;
 711         con->max_rt_time = conn_info->max_rt_time;
 712         con->ttl = conn_info->ttl;
 713         con->tos_or_tc = conn_info->tos_or_tc;
 714         con->mss = conn_info->mss;
 715         con->cwnd = conn_info->cwnd;
 716         con->rcv_wnd_scale = conn_info->rcv_wnd_scale;
 717         con->connect_mode = 0;
 718
 719         return qed_sp_nvmetcp_conn_offload(QED_AFFIN_HWFN(cdev), con,
 720                                          QED_SPQ_MODE_EBLOCK, NULL);
 721 }
 722
 723 static int qed_nvmetcp_update_conn(struct qed_dev *cdev,
 724                                    u32 handle,
 725                                    struct qed_nvmetcp_params_update *conn_info)
 726 {
 727         struct qed_hash_nvmetcp_con *hash_con;
 728         struct qed_nvmetcp_conn *con;
 729
 730         hash_con = qed_nvmetcp_get_hash(cdev, handle);
 731         if (!hash_con) {
 732                 DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
 733                           handle);
 734
 735                 return -EINVAL;
 736         }
 737
 738         /* Update the connection with information from the params */
 739         con = hash_con->con;
 740         SET_FIELD(con->update_flag,
 741                   ISCSI_CONN_UPDATE_RAMROD_PARAMS_INITIAL_R2T, 0);
 742         SET_FIELD(con->update_flag,
 743                   ISCSI_CONN_UPDATE_RAMROD_PARAMS_IMMEDIATE_DATA, 1);
 744         if (conn_info->hdr_digest_en)
 745                 SET_FIELD(con->update_flag, ISCSI_CONN_UPDATE_RAMROD_PARAMS_HD_EN, 1);
 746
 747         if (conn_info->data_digest_en)
 748                 SET_FIELD(con->update_flag, ISCSI_CONN_UPDATE_RAMROD_PARAMS_DD_EN, 1);
 749
 750         /* Placeholder - initialize pfv, cpda, hpda */
 751
 752         con->max_seq_size = conn_info->max_io_size;
 753         con->max_recv_pdu_length = conn_info->max_recv_pdu_length;
 754         con->max_send_pdu_length = conn_info->max_send_pdu_length;
 755         con->first_seq_length = conn_info->max_io_size;
 756
 757         return qed_sp_nvmetcp_conn_update(QED_AFFIN_HWFN(cdev), con,
 758                                         QED_SPQ_MODE_EBLOCK, NULL);
 759 }
 760
 761 static int qed_nvmetcp_clear_conn_sq(struct qed_dev *cdev, u32 handle)
 762 {
 763         struct qed_hash_nvmetcp_con *hash_con;
 764
 765         hash_con = qed_nvmetcp_get_hash(cdev, handle);
 766         if (!hash_con) {
 767                 DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
 768                           handle);
 769
 770                 return -EINVAL;
 771         }
 772
 773         return qed_sp_nvmetcp_conn_clear_sq(QED_AFFIN_HWFN(cdev), hash_con->con,
 774                                             QED_SPQ_MODE_EBLOCK, NULL);
 775 }
 776
 777 static int qed_nvmetcp_destroy_conn(struct qed_dev *cdev,
 778                                     u32 handle, u8 abrt_conn)
 779 {
 780         struct qed_hash_nvmetcp_con *hash_con;
 781
 782         hash_con = qed_nvmetcp_get_hash(cdev, handle);
 783         if (!hash_con) {
 784                 DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
 785                           handle);
 786
 787                 return -EINVAL;
 788         }
 789
 790         hash_con->con->abortive_dsconnect = abrt_conn;
 791
 792         return qed_sp_nvmetcp_conn_terminate(QED_AFFIN_HWFN(cdev), hash_con->con,
 793                                            QED_SPQ_MODE_EBLOCK, NULL);
 794 }
 795
 796 static const struct qed_nvmetcp_ops qed_nvmetcp_ops_pass = {
 797         .common = &qed_common_ops_pass,
 798         .ll2 = &qed_ll2_ops_pass,
 799         .fill_dev_info = &qed_fill_nvmetcp_dev_info,
 800         .register_ops = &qed_register_nvmetcp_ops,
 801         .start = &qed_nvmetcp_start,
 802         .stop = &qed_nvmetcp_stop,
 803         .acquire_conn = &qed_nvmetcp_acquire_conn,
 804         .release_conn = &qed_nvmetcp_release_conn,
 805         .offload_conn = &qed_nvmetcp_offload_conn,
 806         .update_conn = &qed_nvmetcp_update_conn,
 807         .destroy_conn = &qed_nvmetcp_destroy_conn,
 808         .clear_sq = &qed_nvmetcp_clear_conn_sq,
 809         .add_src_tcp_port_filter = &qed_llh_add_src_tcp_port_filter,
 810         .remove_src_tcp_port_filter = &qed_llh_remove_src_tcp_port_filter,
 811         .add_dst_tcp_port_filter = &qed_llh_add_dst_tcp_port_filter,
 812         .remove_dst_tcp_port_filter = &qed_llh_remove_dst_tcp_port_filter,
 813         .clear_all_filters = &qed_llh_clear_all_filters,
 814         .init_read_io = &init_nvmetcp_host_read_task,
 815         .init_write_io = &init_nvmetcp_host_write_task,
 816         .init_icreq_exchange = &init_nvmetcp_init_conn_req_task,
 817         .init_task_cleanup = &init_cleanup_task_nvmetcp
 818 };
 819
 820 const struct qed_nvmetcp_ops *qed_get_nvmetcp_ops(void)
 821 {
 822         return &qed_nvmetcp_ops_pass;
 823 }
 824 EXPORT_SYMBOL(qed_get_nvmetcp_ops);
 825
 826 void qed_put_nvmetcp_ops(void)
 827 {
 828 }
 829 EXPORT_SYMBOL(qed_put_nvmetcp_ops);