drivers/scsi/qla2xxx/qla_nvme.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * QLogic Fibre Channel HBA Driver
   4  * Copyright (c)  2003-2017 QLogic Corporation
   5  */
   6 #include "qla_nvme.h"
   7 #include <linux/scatterlist.h>
   8 #include <linux/delay.h>
   9 #include <linux/nvme.h>
  10 #include <linux/nvme-fc.h>
  11 #include <linux/blk-mq-pci.h>
  12 #include <linux/blk-mq.h>
  13
  14 static struct nvme_fc_port_template qla_nvme_fc_transport;
  15
  16 int qla_nvme_register_remote(struct scsi_qla_host *vha, struct fc_port *fcport)
  17 {
  18         struct qla_nvme_rport *rport;
  19         struct nvme_fc_port_info req;
  20         int ret;
  21
  22         if (!IS_ENABLED(CONFIG_NVME_FC))
  23                 return 0;
  24
  25         if (!vha->flags.nvme_enabled) {
  26                 ql_log(ql_log_info, vha, 0x2100,
  27                     "%s: Not registering target since Host NVME is not enabled\n",
  28                     __func__);
  29                 return 0;
  30         }
  31
  32         if (!vha->nvme_local_port && qla_nvme_register_hba(vha))
  33                 return 0;
  34
  35         if (!(fcport->nvme_prli_service_param &
  36             (NVME_PRLI_SP_TARGET | NVME_PRLI_SP_DISCOVERY)) ||
  37                 (fcport->nvme_flag & NVME_FLAG_REGISTERED))
  38                 return 0;
  39
  40         fcport->nvme_flag &= ~NVME_FLAG_RESETTING;
  41
  42         memset(&req, 0, sizeof(struct nvme_fc_port_info));
  43         req.port_name = wwn_to_u64(fcport->port_name);
  44         req.node_name = wwn_to_u64(fcport->node_name);
  45         req.port_role = 0;
  46         req.dev_loss_tmo = fcport->dev_loss_tmo;
  47
  48         if (fcport->nvme_prli_service_param & NVME_PRLI_SP_INITIATOR)
  49                 req.port_role = FC_PORT_ROLE_NVME_INITIATOR;
  50
  51         if (fcport->nvme_prli_service_param & NVME_PRLI_SP_TARGET)
  52                 req.port_role |= FC_PORT_ROLE_NVME_TARGET;
  53
  54         if (fcport->nvme_prli_service_param & NVME_PRLI_SP_DISCOVERY)
  55                 req.port_role |= FC_PORT_ROLE_NVME_DISCOVERY;
  56
  57         req.port_id = fcport->d_id.b24;
  58
  59         ql_log(ql_log_info, vha, 0x2102,
  60             "%s: traddr=nn-0x%016llx:pn-0x%016llx PortID:%06x\n",
  61             __func__, req.node_name, req.port_name,
  62             req.port_id);
  63
  64         ret = nvme_fc_register_remoteport(vha->nvme_local_port, &req,
  65             &fcport->nvme_remote_port);
  66         if (ret) {
  67                 ql_log(ql_log_warn, vha, 0x212e,
  68                     "Failed to register remote port. Transport returned %d\n",
  69                     ret);
  70                 return ret;
  71         }
  72
  73         nvme_fc_set_remoteport_devloss(fcport->nvme_remote_port,
  74                                        fcport->dev_loss_tmo);
  75
  76         if (fcport->nvme_prli_service_param & NVME_PRLI_SP_SLER)
  77                 ql_log(ql_log_info, vha, 0x212a,
  78                        "PortID:%06x Supports SLER\n", req.port_id);
  79
  80         if (fcport->nvme_prli_service_param & NVME_PRLI_SP_PI_CTRL)
  81                 ql_log(ql_log_info, vha, 0x212b,
  82                        "PortID:%06x Supports PI control\n", req.port_id);
  83
  84         rport = fcport->nvme_remote_port->private;
  85         rport->fcport = fcport;
  86
  87         fcport->nvme_flag |= NVME_FLAG_REGISTERED;
  88         return 0;
  89 }
  90
  91 /* Allocate a queue for NVMe traffic */
  92 static int qla_nvme_alloc_queue(struct nvme_fc_local_port *lport,
  93     unsigned int qidx, u16 qsize, void **handle)
  94 {
  95         struct scsi_qla_host *vha;
  96         struct qla_hw_data *ha;
  97         struct qla_qpair *qpair;
  98
  99         /* Map admin queue and 1st IO queue to index 0 */
 100         if (qidx)
 101                 qidx--;
 102
 103         vha = (struct scsi_qla_host *)lport->private;
 104         ha = vha->hw;
 105
 106         ql_log(ql_log_info, vha, 0x2104,
 107             "%s: handle %p, idx =%d, qsize %d\n",
 108             __func__, handle, qidx, qsize);
 109
 110         if (qidx > qla_nvme_fc_transport.max_hw_queues) {
 111                 ql_log(ql_log_warn, vha, 0x212f,
 112                     "%s: Illegal qidx=%d. Max=%d\n",
 113                     __func__, qidx, qla_nvme_fc_transport.max_hw_queues);
 114                 return -EINVAL;
 115         }
 116
 117         /* Use base qpair if max_qpairs is 0 */
 118         if (!ha->max_qpairs) {
 119                 qpair = ha->base_qpair;
 120         } else {
 121                 if (ha->queue_pair_map[qidx]) {
 122                         *handle = ha->queue_pair_map[qidx];
 123                         ql_log(ql_log_info, vha, 0x2121,
 124                                "Returning existing qpair of %p for idx=%x\n",
 125                                *handle, qidx);
 126                         return 0;
 127                 }
 128
 129                 qpair = qla2xxx_create_qpair(vha, 5, vha->vp_idx, true);
 130                 if (!qpair) {
 131                         ql_log(ql_log_warn, vha, 0x2122,
 132                                "Failed to allocate qpair\n");
 133                         return -EINVAL;
 134                 }
 135         }
 136         *handle = qpair;
 137
 138         return 0;
 139 }
 140
 141 static void qla_nvme_release_fcp_cmd_kref(struct kref *kref)
 142 {
 143         struct srb *sp = container_of(kref, struct srb, cmd_kref);
 144         struct nvme_private *priv = (struct nvme_private *)sp->priv;
 145         struct nvmefc_fcp_req *fd;
 146         struct srb_iocb *nvme;
 147         unsigned long flags;
 148
 149         if (!priv)
 150                 goto out;
 151
 152         nvme = &sp->u.iocb_cmd;
 153         fd = nvme->u.nvme.desc;
 154
 155         spin_lock_irqsave(&priv->cmd_lock, flags);
 156         priv->sp = NULL;
 157         sp->priv = NULL;
 158         if (priv->comp_status == QLA_SUCCESS) {
 159                 fd->rcv_rsplen = le16_to_cpu(nvme->u.nvme.rsp_pyld_len);
 160                 fd->status = NVME_SC_SUCCESS;
 161         } else {
 162                 fd->rcv_rsplen = 0;
 163                 fd->transferred_length = 0;
 164                 fd->status = NVME_SC_INTERNAL;
 165         }
 166         spin_unlock_irqrestore(&priv->cmd_lock, flags);
 167
 168         fd->done(fd);
 169 out:
 170         qla2xxx_rel_qpair_sp(sp->qpair, sp);
 171 }
 172
 173 static void qla_nvme_release_ls_cmd_kref(struct kref *kref)
 174 {
 175         struct srb *sp = container_of(kref, struct srb, cmd_kref);
 176         struct nvme_private *priv = (struct nvme_private *)sp->priv;
 177         struct nvmefc_ls_req *fd;
 178         unsigned long flags;
 179
 180         if (!priv)
 181                 goto out;
 182
 183         spin_lock_irqsave(&priv->cmd_lock, flags);
 184         priv->sp = NULL;
 185         sp->priv = NULL;
 186         spin_unlock_irqrestore(&priv->cmd_lock, flags);
 187
 188         fd = priv->fd;
 189         fd->done(fd, priv->comp_status);
 190 out:
 191         qla2x00_rel_sp(sp);
 192 }
 193
 194 static void qla_nvme_ls_complete(struct work_struct *work)
 195 {
 196         struct nvme_private *priv =
 197                 container_of(work, struct nvme_private, ls_work);
 198
 199         kref_put(&priv->sp->cmd_kref, qla_nvme_release_ls_cmd_kref);
 200 }
 201
 202 static void qla_nvme_sp_ls_done(srb_t *sp, int res)
 203 {
 204         struct nvme_private *priv = sp->priv;
 205
 206         if (WARN_ON_ONCE(kref_read(&sp->cmd_kref) == 0))
 207                 return;
 208
 209         if (res)
 210                 res = -EINVAL;
 211
 212         priv->comp_status = res;
 213         INIT_WORK(&priv->ls_work, qla_nvme_ls_complete);
 214         schedule_work(&priv->ls_work);
 215 }
 216
 217 /* it assumed that QPair lock is held. */
 218 static void qla_nvme_sp_done(srb_t *sp, int res)
 219 {
 220         struct nvme_private *priv = sp->priv;
 221
 222         priv->comp_status = res;
 223         kref_put(&sp->cmd_kref, qla_nvme_release_fcp_cmd_kref);
 224
 225         return;
 226 }
 227
 228 static void qla_nvme_abort_work(struct work_struct *work)
 229 {
 230         struct nvme_private *priv =
 231                 container_of(work, struct nvme_private, abort_work);
 232         srb_t *sp = priv->sp;
 233         fc_port_t *fcport = sp->fcport;
 234         struct qla_hw_data *ha = fcport->vha->hw;
 235         int rval, abts_done_called = 1;
 236         bool io_wait_for_abort_done;
 237         uint32_t handle;
 238
 239         ql_dbg(ql_dbg_io, fcport->vha, 0xffff,
 240                "%s called for sp=%p, hndl=%x on fcport=%p desc=%p deleted=%d\n",
 241                __func__, sp, sp->handle, fcport, sp->u.iocb_cmd.u.nvme.desc, fcport->deleted);
 242
 243         if (!ha->flags.fw_started || fcport->deleted == QLA_SESS_DELETED)
 244                 goto out;
 245
 246         if (ha->flags.host_shutting_down) {
 247                 ql_log(ql_log_info, sp->fcport->vha, 0xffff,
 248                     "%s Calling done on sp: %p, type: 0x%x\n",
 249                     __func__, sp, sp->type);
 250                 sp->done(sp, 0);
 251                 goto out;
 252         }
 253
 254         /*
 255          * sp may not be valid after abort_command if return code is either
 256          * SUCCESS or ERR_FROM_FW codes, so cache the value here.
 257          */
 258         io_wait_for_abort_done = ql2xabts_wait_nvme &&
 259                                         QLA_ABTS_WAIT_ENABLED(sp);
 260         handle = sp->handle;
 261
 262         rval = ha->isp_ops->abort_command(sp);
 263
 264         ql_dbg(ql_dbg_io, fcport->vha, 0x212b,
 265             "%s: %s command for sp=%p, handle=%x on fcport=%p rval=%x\n",
 266             __func__, (rval != QLA_SUCCESS) ? "Failed to abort" : "Aborted",
 267             sp, handle, fcport, rval);
 268
 269         /*
 270          * If async tmf is enabled, the abort callback is called only on
 271          * return codes QLA_SUCCESS and QLA_ERR_FROM_FW.
 272          */
 273         if (ql2xasynctmfenable &&
 274             rval != QLA_SUCCESS && rval != QLA_ERR_FROM_FW)
 275                 abts_done_called = 0;
 276
 277         /*
 278          * Returned before decreasing kref so that I/O requests
 279          * are waited until ABTS complete. This kref is decreased
 280          * at qla24xx_abort_sp_done function.
 281          */
 282         if (abts_done_called && io_wait_for_abort_done)
 283                 return;
 284 out:
 285         /* kref_get was done before work was schedule. */
 286         kref_put(&sp->cmd_kref, sp->put_fn);
 287 }
 288
 289 static void qla_nvme_ls_abort(struct nvme_fc_local_port *lport,
 290     struct nvme_fc_remote_port *rport, struct nvmefc_ls_req *fd)
 291 {
 292         struct nvme_private *priv = fd->private;
 293         unsigned long flags;
 294
 295         spin_lock_irqsave(&priv->cmd_lock, flags);
 296         if (!priv->sp) {
 297                 spin_unlock_irqrestore(&priv->cmd_lock, flags);
 298                 return;
 299         }
 300
 301         if (!kref_get_unless_zero(&priv->sp->cmd_kref)) {
 302                 spin_unlock_irqrestore(&priv->cmd_lock, flags);
 303                 return;
 304         }
 305         spin_unlock_irqrestore(&priv->cmd_lock, flags);
 306
 307         INIT_WORK(&priv->abort_work, qla_nvme_abort_work);
 308         schedule_work(&priv->abort_work);
 309 }
 310
 311 static int qla_nvme_ls_req(struct nvme_fc_local_port *lport,
 312     struct nvme_fc_remote_port *rport, struct nvmefc_ls_req *fd)
 313 {
 314         struct qla_nvme_rport *qla_rport = rport->private;
 315         fc_port_t *fcport = qla_rport->fcport;
 316         struct srb_iocb   *nvme;
 317         struct nvme_private *priv = fd->private;
 318         struct scsi_qla_host *vha;
 319         int     rval = QLA_FUNCTION_FAILED;
 320         struct qla_hw_data *ha;
 321         srb_t           *sp;
 322
 323         if (!fcport || fcport->deleted)
 324                 return rval;
 325
 326         vha = fcport->vha;
 327         ha = vha->hw;
 328
 329         if (!ha->flags.fw_started)
 330                 return rval;
 331
 332         /* Alloc SRB structure */
 333         sp = qla2x00_get_sp(vha, fcport, GFP_ATOMIC);
 334         if (!sp)
 335                 return rval;
 336
 337         sp->type = SRB_NVME_LS;
 338         sp->name = "nvme_ls";
 339         sp->done = qla_nvme_sp_ls_done;
 340         sp->put_fn = qla_nvme_release_ls_cmd_kref;
 341         sp->priv = priv;
 342         priv->sp = sp;
 343         kref_init(&sp->cmd_kref);
 344         spin_lock_init(&priv->cmd_lock);
 345         nvme = &sp->u.iocb_cmd;
 346         priv->fd = fd;
 347         nvme->u.nvme.desc = fd;
 348         nvme->u.nvme.dir = 0;
 349         nvme->u.nvme.dl = 0;
 350         nvme->u.nvme.cmd_len = fd->rqstlen;
 351         nvme->u.nvme.rsp_len = fd->rsplen;
 352         nvme->u.nvme.rsp_dma = fd->rspdma;
 353         nvme->u.nvme.timeout_sec = fd->timeout;
 354         nvme->u.nvme.cmd_dma = dma_map_single(&ha->pdev->dev, fd->rqstaddr,
 355             fd->rqstlen, DMA_TO_DEVICE);
 356         dma_sync_single_for_device(&ha->pdev->dev, nvme->u.nvme.cmd_dma,
 357             fd->rqstlen, DMA_TO_DEVICE);
 358
 359         rval = qla2x00_start_sp(sp);
 360         if (rval != QLA_SUCCESS) {
 361                 ql_log(ql_log_warn, vha, 0x700e,
 362                     "qla2x00_start_sp failed = %d\n", rval);
 363                 wake_up(&sp->nvme_ls_waitq);
 364                 sp->priv = NULL;
 365                 priv->sp = NULL;
 366                 qla2x00_rel_sp(sp);
 367                 return rval;
 368         }
 369
 370         return rval;
 371 }
 372
 373 static void qla_nvme_fcp_abort(struct nvme_fc_local_port *lport,
 374     struct nvme_fc_remote_port *rport, void *hw_queue_handle,
 375     struct nvmefc_fcp_req *fd)
 376 {
 377         struct nvme_private *priv = fd->private;
 378         unsigned long flags;
 379
 380         spin_lock_irqsave(&priv->cmd_lock, flags);
 381         if (!priv->sp) {
 382                 spin_unlock_irqrestore(&priv->cmd_lock, flags);
 383                 return;
 384         }
 385         if (!kref_get_unless_zero(&priv->sp->cmd_kref)) {
 386                 spin_unlock_irqrestore(&priv->cmd_lock, flags);
 387                 return;
 388         }
 389         spin_unlock_irqrestore(&priv->cmd_lock, flags);
 390
 391         INIT_WORK(&priv->abort_work, qla_nvme_abort_work);
 392         schedule_work(&priv->abort_work);
 393 }
 394
 395 static inline int qla2x00_start_nvme_mq(srb_t *sp)
 396 {
 397         unsigned long   flags;
 398         uint32_t        *clr_ptr;
 399         uint32_t        handle;
 400         struct cmd_nvme *cmd_pkt;
 401         uint16_t        cnt, i;
 402         uint16_t        req_cnt;
 403         uint16_t        tot_dsds;
 404         uint16_t        avail_dsds;
 405         struct dsd64    *cur_dsd;
 406         struct req_que *req = NULL;
 407         struct rsp_que *rsp = NULL;
 408         struct scsi_qla_host *vha = sp->fcport->vha;
 409         struct qla_hw_data *ha = vha->hw;
 410         struct qla_qpair *qpair = sp->qpair;
 411         struct srb_iocb *nvme = &sp->u.iocb_cmd;
 412         struct scatterlist *sgl, *sg;
 413         struct nvmefc_fcp_req *fd = nvme->u.nvme.desc;
 414         struct nvme_fc_cmd_iu *cmd = fd->cmdaddr;
 415         uint32_t        rval = QLA_SUCCESS;
 416
 417         /* Setup qpair pointers */
 418         req = qpair->req;
 419         rsp = qpair->rsp;
 420         tot_dsds = fd->sg_cnt;
 421
 422         /* Acquire qpair specific lock */
 423         spin_lock_irqsave(&qpair->qp_lock, flags);
 424
 425         handle = qla2xxx_get_next_handle(req);
 426         if (handle == 0) {
 427                 rval = -EBUSY;
 428                 goto queuing_error;
 429         }
 430         req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
 431         if (req->cnt < (req_cnt + 2)) {
 432                 if (IS_SHADOW_REG_CAPABLE(ha)) {
 433                         cnt = *req->out_ptr;
 434                 } else {
 435                         cnt = rd_reg_dword_relaxed(req->req_q_out);
 436                         if (qla2x00_check_reg16_for_disconnect(vha, cnt))
 437                                 goto queuing_error;
 438                 }
 439
 440                 if (req->ring_index < cnt)
 441                         req->cnt = cnt - req->ring_index;
 442                 else
 443                         req->cnt = req->length - (req->ring_index - cnt);
 444
 445                 if (req->cnt < (req_cnt + 2)){
 446                         rval = -EBUSY;
 447                         goto queuing_error;
 448                 }
 449         }
 450
 451         if (unlikely(!fd->sqid)) {
 452                 if (cmd->sqe.common.opcode == nvme_admin_async_event) {
 453                         nvme->u.nvme.aen_op = 1;
 454                         atomic_inc(&ha->nvme_active_aen_cnt);
 455                 }
 456         }
 457
 458         /* Build command packet. */
 459         req->current_outstanding_cmd = handle;
 460         req->outstanding_cmds[handle] = sp;
 461         sp->handle = handle;
 462         req->cnt -= req_cnt;
 463
 464         cmd_pkt = (struct cmd_nvme *)req->ring_ptr;
 465         cmd_pkt->handle = make_handle(req->id, handle);
 466
 467         /* Zero out remaining portion of packet. */
 468         clr_ptr = (uint32_t *)cmd_pkt + 2;
 469         memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
 470
 471         cmd_pkt->entry_status = 0;
 472
 473         /* Update entry type to indicate Command NVME IOCB */
 474         cmd_pkt->entry_type = COMMAND_NVME;
 475
 476         /* No data transfer how do we check buffer len == 0?? */
 477         if (fd->io_dir == NVMEFC_FCP_READ) {
 478                 cmd_pkt->control_flags = cpu_to_le16(CF_READ_DATA);
 479                 qpair->counters.input_bytes += fd->payload_length;
 480                 qpair->counters.input_requests++;
 481         } else if (fd->io_dir == NVMEFC_FCP_WRITE) {
 482                 cmd_pkt->control_flags = cpu_to_le16(CF_WRITE_DATA);
 483                 if ((vha->flags.nvme_first_burst) &&
 484                     (sp->fcport->nvme_prli_service_param &
 485                         NVME_PRLI_SP_FIRST_BURST)) {
 486                         if ((fd->payload_length <=
 487                             sp->fcport->nvme_first_burst_size) ||
 488                                 (sp->fcport->nvme_first_burst_size == 0))
 489                                 cmd_pkt->control_flags |=
 490                                         cpu_to_le16(CF_NVME_FIRST_BURST_ENABLE);
 491                 }
 492                 qpair->counters.output_bytes += fd->payload_length;
 493                 qpair->counters.output_requests++;
 494         } else if (fd->io_dir == 0) {
 495                 cmd_pkt->control_flags = 0;
 496         }
 497
 498         if (sp->fcport->edif.enable && fd->io_dir != 0)
 499                 cmd_pkt->control_flags |= cpu_to_le16(CF_EN_EDIF);
 500
 501         /* Set BIT_13 of control flags for Async event */
 502         if (vha->flags.nvme2_enabled &&
 503             cmd->sqe.common.opcode == nvme_admin_async_event) {
 504                 cmd_pkt->control_flags |= cpu_to_le16(CF_ADMIN_ASYNC_EVENT);
 505         }
 506
 507         /* Set NPORT-ID */
 508         cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
 509         cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
 510         cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
 511         cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
 512         cmd_pkt->vp_index = sp->fcport->vha->vp_idx;
 513
 514         /* NVME RSP IU */
 515         cmd_pkt->nvme_rsp_dsd_len = cpu_to_le16(fd->rsplen);
 516         put_unaligned_le64(fd->rspdma, &cmd_pkt->nvme_rsp_dseg_address);
 517
 518         /* NVME CNMD IU */
 519         cmd_pkt->nvme_cmnd_dseg_len = cpu_to_le16(fd->cmdlen);
 520         cmd_pkt->nvme_cmnd_dseg_address = cpu_to_le64(fd->cmddma);
 521
 522         cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
 523         cmd_pkt->byte_count = cpu_to_le32(fd->payload_length);
 524
 525         /* One DSD is available in the Command Type NVME IOCB */
 526         avail_dsds = 1;
 527         cur_dsd = &cmd_pkt->nvme_dsd;
 528         sgl = fd->first_sgl;
 529
 530         /* Load data segments */
 531         for_each_sg(sgl, sg, tot_dsds, i) {
 532                 cont_a64_entry_t *cont_pkt;
 533
 534                 /* Allocate additional continuation packets? */
 535                 if (avail_dsds == 0) {
 536                         /*
 537                          * Five DSDs are available in the Continuation
 538                          * Type 1 IOCB.
 539                          */
 540
 541                         /* Adjust ring index */
 542                         req->ring_index++;
 543                         if (req->ring_index == req->length) {
 544                                 req->ring_index = 0;
 545                                 req->ring_ptr = req->ring;
 546                         } else {
 547                                 req->ring_ptr++;
 548                         }
 549                         cont_pkt = (cont_a64_entry_t *)req->ring_ptr;
 550                         put_unaligned_le32(CONTINUE_A64_TYPE,
 551                                            &cont_pkt->entry_type);
 552
 553                         cur_dsd = cont_pkt->dsd;
 554                         avail_dsds = ARRAY_SIZE(cont_pkt->dsd);
 555                 }
 556
 557                 append_dsd64(&cur_dsd, sg);
 558                 avail_dsds--;
 559         }
 560
 561         /* Set total entry count. */
 562         cmd_pkt->entry_count = (uint8_t)req_cnt;
 563         wmb();
 564
 565         /* Adjust ring index. */
 566         req->ring_index++;
 567         if (req->ring_index == req->length) {
 568                 req->ring_index = 0;
 569                 req->ring_ptr = req->ring;
 570         } else {
 571                 req->ring_ptr++;
 572         }
 573
 574         /* ignore nvme async cmd due to long timeout */
 575         if (!nvme->u.nvme.aen_op)
 576                 sp->qpair->cmd_cnt++;
 577
 578         /* Set chip new ring index. */
 579         wrt_reg_dword(req->req_q_in, req->ring_index);
 580
 581         if (vha->flags.process_response_queue &&
 582             rsp->ring_ptr->signature != RESPONSE_PROCESSED)
 583                 qla24xx_process_response_queue(vha, rsp);
 584
 585 queuing_error:
 586         spin_unlock_irqrestore(&qpair->qp_lock, flags);
 587
 588         return rval;
 589 }
 590
 591 /* Post a command */
 592 static int qla_nvme_post_cmd(struct nvme_fc_local_port *lport,
 593     struct nvme_fc_remote_port *rport, void *hw_queue_handle,
 594     struct nvmefc_fcp_req *fd)
 595 {
 596         fc_port_t *fcport;
 597         struct srb_iocb *nvme;
 598         struct scsi_qla_host *vha;
 599         int rval;
 600         srb_t *sp;
 601         struct qla_qpair *qpair = hw_queue_handle;
 602         struct nvme_private *priv = fd->private;
 603         struct qla_nvme_rport *qla_rport = rport->private;
 604
 605         if (!priv) {
 606                 /* nvme association has been torn down */
 607                 return -ENODEV;
 608         }
 609
 610         fcport = qla_rport->fcport;
 611
 612         if (unlikely(!qpair || !fcport || fcport->deleted))
 613                 return -EBUSY;
 614
 615         if (!(fcport->nvme_flag & NVME_FLAG_REGISTERED))
 616                 return -ENODEV;
 617
 618         vha = fcport->vha;
 619
 620         if (test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags))
 621                 return -EBUSY;
 622
 623         /*
 624          * If we know the dev is going away while the transport is still sending
 625          * IO's return busy back to stall the IO Q.  This happens when the
 626          * link goes away and fw hasn't notified us yet, but IO's are being
 627          * returned. If the dev comes back quickly we won't exhaust the IO
 628          * retry count at the core.
 629          */
 630         if (fcport->nvme_flag & NVME_FLAG_RESETTING)
 631                 return -EBUSY;
 632
 633         /* Alloc SRB structure */
 634         sp = qla2xxx_get_qpair_sp(vha, qpair, fcport, GFP_ATOMIC);
 635         if (!sp)
 636                 return -EBUSY;
 637
 638         init_waitqueue_head(&sp->nvme_ls_waitq);
 639         kref_init(&sp->cmd_kref);
 640         spin_lock_init(&priv->cmd_lock);
 641         sp->priv = priv;
 642         priv->sp = sp;
 643         sp->type = SRB_NVME_CMD;
 644         sp->name = "nvme_cmd";
 645         sp->done = qla_nvme_sp_done;
 646         sp->put_fn = qla_nvme_release_fcp_cmd_kref;
 647         sp->qpair = qpair;
 648         sp->vha = vha;
 649         sp->cmd_sp = sp;
 650         nvme = &sp->u.iocb_cmd;
 651         nvme->u.nvme.desc = fd;
 652
 653         rval = qla2x00_start_nvme_mq(sp);
 654         if (rval != QLA_SUCCESS) {
 655                 ql_log(ql_log_warn, vha, 0x212d,
 656                     "qla2x00_start_nvme_mq failed = %d\n", rval);
 657                 wake_up(&sp->nvme_ls_waitq);
 658                 sp->priv = NULL;
 659                 priv->sp = NULL;
 660                 qla2xxx_rel_qpair_sp(sp->qpair, sp);
 661         }
 662
 663         return rval;
 664 }
 665
 666 static void qla_nvme_map_queues(struct nvme_fc_local_port *lport,
 667                 struct blk_mq_queue_map *map)
 668 {
 669         struct scsi_qla_host *vha = lport->private;
 670         int rc;
 671
 672         rc = blk_mq_pci_map_queues(map, vha->hw->pdev, vha->irq_offset);
 673         if (rc)
 674                 ql_log(ql_log_warn, vha, 0x21de,
 675                        "pci map queue failed 0x%x", rc);
 676 }
 677
 678 static void qla_nvme_localport_delete(struct nvme_fc_local_port *lport)
 679 {
 680         struct scsi_qla_host *vha = lport->private;
 681
 682         ql_log(ql_log_info, vha, 0x210f,
 683             "localport delete of %p completed.\n", vha->nvme_local_port);
 684         vha->nvme_local_port = NULL;
 685         complete(&vha->nvme_del_done);
 686 }
 687
 688 static void qla_nvme_remoteport_delete(struct nvme_fc_remote_port *rport)
 689 {
 690         fc_port_t *fcport;
 691         struct qla_nvme_rport *qla_rport = rport->private;
 692
 693         fcport = qla_rport->fcport;
 694         fcport->nvme_remote_port = NULL;
 695         fcport->nvme_flag &= ~NVME_FLAG_REGISTERED;
 696         fcport->nvme_flag &= ~NVME_FLAG_DELETING;
 697         ql_log(ql_log_info, fcport->vha, 0x2110,
 698             "remoteport_delete of %p %8phN completed.\n",
 699             fcport, fcport->port_name);
 700         complete(&fcport->nvme_del_done);
 701 }
 702
 703 static struct nvme_fc_port_template qla_nvme_fc_transport = {
 704         .localport_delete = qla_nvme_localport_delete,
 705         .remoteport_delete = qla_nvme_remoteport_delete,
 706         .create_queue   = qla_nvme_alloc_queue,
 707         .delete_queue   = NULL,
 708         .ls_req         = qla_nvme_ls_req,
 709         .ls_abort       = qla_nvme_ls_abort,
 710         .fcp_io         = qla_nvme_post_cmd,
 711         .fcp_abort      = qla_nvme_fcp_abort,
 712         .map_queues     = qla_nvme_map_queues,
 713         .max_hw_queues  = 8,
 714         .max_sgl_segments = 1024,
 715         .max_dif_sgl_segments = 64,
 716         .dma_boundary = 0xFFFFFFFF,
 717         .local_priv_sz  = 8,
 718         .remote_priv_sz = sizeof(struct qla_nvme_rport),
 719         .lsrqst_priv_sz = sizeof(struct nvme_private),
 720         .fcprqst_priv_sz = sizeof(struct nvme_private),
 721 };
 722
 723 void qla_nvme_unregister_remote_port(struct fc_port *fcport)
 724 {
 725         int ret;
 726
 727         if (!IS_ENABLED(CONFIG_NVME_FC))
 728                 return;
 729
 730         ql_log(ql_log_warn, fcport->vha, 0x2112,
 731             "%s: unregister remoteport on %p %8phN\n",
 732             __func__, fcport, fcport->port_name);
 733
 734         if (test_bit(PFLG_DRIVER_REMOVING, &fcport->vha->pci_flags))
 735                 nvme_fc_set_remoteport_devloss(fcport->nvme_remote_port, 0);
 736
 737         init_completion(&fcport->nvme_del_done);
 738         ret = nvme_fc_unregister_remoteport(fcport->nvme_remote_port);
 739         if (ret)
 740                 ql_log(ql_log_info, fcport->vha, 0x2114,
 741                         "%s: Failed to unregister nvme_remote_port (%d)\n",
 742                             __func__, ret);
 743         wait_for_completion(&fcport->nvme_del_done);
 744 }
 745
 746 void qla_nvme_delete(struct scsi_qla_host *vha)
 747 {
 748         int nv_ret;
 749
 750         if (!IS_ENABLED(CONFIG_NVME_FC))
 751                 return;
 752
 753         if (vha->nvme_local_port) {
 754                 init_completion(&vha->nvme_del_done);
 755                 ql_log(ql_log_info, vha, 0x2116,
 756                         "unregister localport=%p\n",
 757                         vha->nvme_local_port);
 758                 nv_ret = nvme_fc_unregister_localport(vha->nvme_local_port);
 759                 if (nv_ret)
 760                         ql_log(ql_log_info, vha, 0x2115,
 761                             "Unregister of localport failed\n");
 762                 else
 763                         wait_for_completion(&vha->nvme_del_done);
 764         }
 765 }
 766
 767 int qla_nvme_register_hba(struct scsi_qla_host *vha)
 768 {
 769         struct nvme_fc_port_template *tmpl;
 770         struct qla_hw_data *ha;
 771         struct nvme_fc_port_info pinfo;
 772         int ret = -EINVAL;
 773
 774         if (!IS_ENABLED(CONFIG_NVME_FC))
 775                 return ret;
 776
 777         ha = vha->hw;
 778         tmpl = &qla_nvme_fc_transport;
 779
 780         WARN_ON(vha->nvme_local_port);
 781
 782         qla_nvme_fc_transport.max_hw_queues =
 783             min((uint8_t)(qla_nvme_fc_transport.max_hw_queues),
 784                 (uint8_t)(ha->max_qpairs ? ha->max_qpairs : 1));
 785
 786         pinfo.node_name = wwn_to_u64(vha->node_name);
 787         pinfo.port_name = wwn_to_u64(vha->port_name);
 788         pinfo.port_role = FC_PORT_ROLE_NVME_INITIATOR;
 789         pinfo.port_id = vha->d_id.b24;
 790
 791         ql_log(ql_log_info, vha, 0xffff,
 792             "register_localport: host-traddr=nn-0x%llx:pn-0x%llx on portID:%x\n",
 793             pinfo.node_name, pinfo.port_name, pinfo.port_id);
 794         qla_nvme_fc_transport.dma_boundary = vha->host->dma_boundary;
 795
 796         ret = nvme_fc_register_localport(&pinfo, tmpl,
 797             get_device(&ha->pdev->dev), &vha->nvme_local_port);
 798         if (ret) {
 799                 ql_log(ql_log_warn, vha, 0xffff,
 800                     "register_localport failed: ret=%x\n", ret);
 801         } else {
 802                 vha->nvme_local_port->private = vha;
 803         }
 804
 805         return ret;
 806 }
 807
 808 void qla_nvme_abort_set_option(struct abort_entry_24xx *abt, srb_t *orig_sp)
 809 {
 810         struct qla_hw_data *ha;
 811
 812         if (!(ql2xabts_wait_nvme && QLA_ABTS_WAIT_ENABLED(orig_sp)))
 813                 return;
 814
 815         ha = orig_sp->fcport->vha->hw;
 816
 817         WARN_ON_ONCE(abt->options & cpu_to_le16(BIT_0));
 818         /* Use Driver Specified Retry Count */
 819         abt->options |= cpu_to_le16(AOF_ABTS_RTY_CNT);
 820         abt->drv.abts_rty_cnt = cpu_to_le16(2);
 821         /* Use specified response timeout */
 822         abt->options |= cpu_to_le16(AOF_RSP_TIMEOUT);
 823         /* set it to 2 * r_a_tov in secs */
 824         abt->drv.rsp_timeout = cpu_to_le16(2 * (ha->r_a_tov / 10));
 825 }
 826
 827 void qla_nvme_abort_process_comp_status(struct abort_entry_24xx *abt, srb_t *orig_sp)
 828 {
 829         u16     comp_status;
 830         struct scsi_qla_host *vha;
 831
 832         if (!(ql2xabts_wait_nvme && QLA_ABTS_WAIT_ENABLED(orig_sp)))
 833                 return;
 834
 835         vha = orig_sp->fcport->vha;
 836
 837         comp_status = le16_to_cpu(abt->comp_status);
 838         switch (comp_status) {
 839         case CS_RESET:          /* reset event aborted */
 840         case CS_ABORTED:        /* IOCB was cleaned */
 841         /* N_Port handle is not currently logged in */
 842         case CS_TIMEOUT:
 843         /* N_Port handle was logged out while waiting for ABTS to complete */
 844         case CS_PORT_UNAVAILABLE:
 845         /* Firmware found that the port name changed */
 846         case CS_PORT_LOGGED_OUT:
 847         /* BA_RJT was received for the ABTS */
 848         case CS_PORT_CONFIG_CHG:
 849                 ql_dbg(ql_dbg_async, vha, 0xf09d,
 850                        "Abort I/O IOCB completed with error, comp_status=%x\n",
 851                 comp_status);
 852                 break;
 853
 854         /* BA_RJT was received for the ABTS */
 855         case CS_REJECT_RECEIVED:
 856                 ql_dbg(ql_dbg_async, vha, 0xf09e,
 857                        "BA_RJT was received for the ABTS rjt_vendorUnique = %u",
 858                         abt->fw.ba_rjt_vendorUnique);
 859                 ql_dbg(ql_dbg_async + ql_dbg_mbx, vha, 0xf09e,
 860                        "ba_rjt_reasonCodeExpl = %u, ba_rjt_reasonCode = %u\n",
 861                        abt->fw.ba_rjt_reasonCodeExpl, abt->fw.ba_rjt_reasonCode);
 862                 break;
 863
 864         case CS_COMPLETE:
 865                 ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0xf09f,
 866                        "IOCB request is completed successfully comp_status=%x\n",
 867                 comp_status);
 868                 break;
 869
 870         case CS_IOCB_ERROR:
 871                 ql_dbg(ql_dbg_async, vha, 0xf0a0,
 872                        "IOCB request is failed, comp_status=%x\n", comp_status);
 873                 break;
 874
 875         default:
 876                 ql_dbg(ql_dbg_async, vha, 0xf0a1,
 877                        "Invalid Abort IO IOCB Completion Status %x\n",
 878                 comp_status);
 879                 break;
 880         }
 881 }
 882
 883 inline void qla_wait_nvme_release_cmd_kref(srb_t *orig_sp)
 884 {
 885         if (!(ql2xabts_wait_nvme && QLA_ABTS_WAIT_ENABLED(orig_sp)))
 886                 return;
 887         kref_put(&orig_sp->cmd_kref, orig_sp->put_fn);
 888 }