text: // SPDX-License-Identifier: GPL-2.0-only
  /*
   * QLogic Fibre Channel HBA Driver
   * Copyright (c)  2003-2017 QLogic Corporation
   */
  #include "qla_nvme.h"
  #include <linux/scatterlist.h>
  #include <linux/delay.h>
  #include <linux/nvme.h>
  #include <linux/nvme-fc.h>
  
  static struct nvme_fc_port_template qla_nvme_fc_transport;
  
  int qla_nvme_register_remote(struct scsi_qla_host *vha, struct fc_port *fcport)
  {
  	struct qla_nvme_rport *rport;
  	struct nvme_fc_port_info req;
  	int ret;
  
  	if (!IS_ENABLED(CONFIG_NVME_FC))
  		return 0;
  
  	if (!vha->flags.nvme_enabled) {
  		ql_log(ql_log_info, vha, 0x2100,
  		    "%s: Not registering target since Host NVME is not enabled\n",
  		    __func__);
  		return 0;
  	}
  
  	if (!vha->nvme_local_port && qla_nvme_register_hba(vha))
  		return 0;
  
  	if (!(fcport->nvme_prli_service_param &
  	    (NVME_PRLI_SP_TARGET | NVME_PRLI_SP_DISCOVERY)) ||
  		(fcport->nvme_flag & NVME_FLAG_REGISTERED))
  		return 0;
  
  	fcport->nvme_flag &= ~NVME_FLAG_RESETTING;
  
  	memset(&req, 0, sizeof(struct nvme_fc_port_info));
  	req.port_name = wwn_to_u64(fcport->port_name);
  	req.node_name = wwn_to_u64(fcport->node_name);
  	req.port_role = 0;
  	req.dev_loss_tmo = 0;
  
  	if (fcport->nvme_prli_service_param & NVME_PRLI_SP_INITIATOR)
  		req.port_role = FC_PORT_ROLE_NVME_INITIATOR;
  
  	if (fcport->nvme_prli_service_param & NVME_PRLI_SP_TARGET)
  		req.port_role |= FC_PORT_ROLE_NVME_TARGET;
  
  	if (fcport->nvme_prli_service_param & NVME_PRLI_SP_DISCOVERY)
  		req.port_role |= FC_PORT_ROLE_NVME_DISCOVERY;
  
  	req.port_id = fcport->d_id.b24;
  
  	ql_log(ql_log_info, vha, 0x2102,
  	    "%s: traddr=nn-0x%016llx:pn-0x%016llx PortID:%06x\n",
  	    __func__, req.node_name, req.port_name,
  	    req.port_id);
  
  	ret = nvme_fc_register_remoteport(vha->nvme_local_port, &req,
  	    &fcport->nvme_remote_port);
  	if (ret) {
  		ql_log(ql_log_warn, vha, 0x212e,
  		    "Failed to register remote port. Transport returned %d\n",
  		    ret);
  		return ret;
  	}
  
  	if (fcport->nvme_prli_service_param & NVME_PRLI_SP_SLER)
  		ql_log(ql_log_info, vha, 0x212a,
  		       "PortID:%06x Supports SLER\n", req.port_id);
  
  	if (fcport->nvme_prli_service_param & NVME_PRLI_SP_PI_CTRL)
  		ql_log(ql_log_info, vha, 0x212b,
  		       "PortID:%06x Supports PI control\n", req.port_id);
  
  	rport = fcport->nvme_remote_port->private;
  	rport->fcport = fcport;
  
  	fcport->nvme_flag |= NVME_FLAG_REGISTERED;
  	return 0;
  }
  
  /* Allocate a queue for NVMe traffic */
  static int qla_nvme_alloc_queue(struct nvme_fc_local_port *lport,
      unsigned int qidx, u16 qsize, void **handle)
  {
  	struct scsi_qla_host *vha;
  	struct qla_hw_data *ha;
  	struct qla_qpair *qpair;
  
  	if (!qidx)
  		qidx++;
  
  	vha = (struct scsi_qla_host *)lport->private;
  	ha = vha->hw;
  
  	ql_log(ql_log_info, vha, 0x2104,
  	    "%s: handle %p, idx =%d, qsize %d\n",
  	    __func__, handle, qidx, qsize);
  
  	if (qidx > qla_nvme_fc_transport.max_hw_queues) {
  		ql_log(ql_log_warn, vha, 0x212f,
  		    "%s: Illegal qidx=%d. Max=%d\n",
  		    __func__, qidx, qla_nvme_fc_transport.max_hw_queues);
  		return -EINVAL;
  	}
  
  	if (ha->queue_pair_map[qidx]) {
  		*handle = ha->queue_pair_map[qidx];
  		ql_log(ql_log_info, vha, 0x2121,
  		    "Returning existing qpair of %p for idx=%x\n",
  		    *handle, qidx);
  		return 0;
  	}
  
  	qpair = qla2xxx_create_qpair(vha, 5, vha->vp_idx, true);
  	if (qpair == NULL) {
  		ql_log(ql_log_warn, vha, 0x2122,
  		    "Failed to allocate qpair\n");
  		return -EINVAL;
  	}
  	*handle = qpair;
  
  	return 0;
  }
  
  static void qla_nvme_release_fcp_cmd_kref(struct kref *kref)
  {
  	struct srb *sp = container_of(kref, struct srb, cmd_kref);
  	struct nvme_private *priv = (struct nvme_private *)sp->priv;
  	struct nvmefc_fcp_req *fd;
  	struct srb_iocb *nvme;
  	unsigned long flags;
  
  	if (!priv)
  		goto out;
  
  	nvme = &sp->u.iocb_cmd;
  	fd = nvme->u.nvme.desc;
  
  	spin_lock_irqsave(&priv->cmd_lock, flags);
  	priv->sp = NULL;
  	sp->priv = NULL;
  	if (priv->comp_status == QLA_SUCCESS) {
  		fd->rcv_rsplen = le16_to_cpu(nvme->u.nvme.rsp_pyld_len);
  		fd->status = NVME_SC_SUCCESS;
  	} else {
  		fd->rcv_rsplen = 0;
  		fd->transferred_length = 0;
  		fd->status = NVME_SC_INTERNAL;
  	}
  	spin_unlock_irqrestore(&priv->cmd_lock, flags);
  
  	fd->done(fd);
  out:
  	qla2xxx_rel_qpair_sp(sp->qpair, sp);
  }
  
  static void qla_nvme_release_ls_cmd_kref(struct kref *kref)
  {
  	struct srb *sp = container_of(kref, struct srb, cmd_kref);
  	struct nvme_private *priv = (struct nvme_private *)sp->priv;
  	struct nvmefc_ls_req *fd;
  	unsigned long flags;
  
  	if (!priv)
  		goto out;
  
  	spin_lock_irqsave(&priv->cmd_lock, flags);
  	priv->sp = NULL;
  	sp->priv = NULL;
  	spin_unlock_irqrestore(&priv->cmd_lock, flags);
  
  	fd = priv->fd;
  	fd->done(fd, priv->comp_status);
  out:
  	qla2x00_rel_sp(sp);
  }
  
  static void qla_nvme_ls_complete(struct work_struct *work)
  {
  	struct nvme_private *priv =
  		container_of(work, struct nvme_private, ls_work);
  
  	kref_put(&priv->sp->cmd_kref, qla_nvme_release_ls_cmd_kref);
  }
  
  static void qla_nvme_sp_ls_done(srb_t *sp, int res)
  {
  	struct nvme_private *priv = sp->priv;
  
  	if (WARN_ON_ONCE(kref_read(&sp->cmd_kref) == 0))
  		return;
  
  	if (res)
  		res = -EINVAL;
  
  	priv->comp_status = res;
  	INIT_WORK(&priv->ls_work, qla_nvme_ls_complete);
  	schedule_work(&priv->ls_work);
  }
  
  /* it assumed that QPair lock is held. */
  static void qla_nvme_sp_done(srb_t *sp, int res)
  {
  	struct nvme_private *priv = sp->priv;
  
  	priv->comp_status = res;
  	kref_put(&sp->cmd_kref, qla_nvme_release_fcp_cmd_kref);
  
  	return;
  }
  
  static void qla_nvme_abort_work(struct work_struct *work)
  {
  	struct nvme_private *priv =
  		container_of(work, struct nvme_private, abort_work);
  	srb_t *sp = priv->sp;
  	fc_port_t *fcport = sp->fcport;
  	struct qla_hw_data *ha = fcport->vha->hw;
  	int rval;
  
  	ql_dbg(ql_dbg_io, fcport->vha, 0xffff,
  	       "%s called for sp=%p, hndl=%x on fcport=%p deleted=%d\n",
  	       __func__, sp, sp->handle, fcport, fcport->deleted);
  
  	if (!ha->flags.fw_started && fcport->deleted)
  		goto out;
  
  	if (ha->flags.host_shutting_down) {
  		ql_log(ql_log_info, sp->fcport->vha, 0xffff,
  		    "%s Calling done on sp: %p, type: 0x%x\n",
  		    __func__, sp, sp->type);
  		sp->done(sp, 0);
  		goto out;
  	}
  
  	rval = ha->isp_ops->abort_command(sp);
  
  	ql_dbg(ql_dbg_io, fcport->vha, 0x212b,
  	    "%s: %s command for sp=%p, handle=%x on fcport=%p rval=%x\n",
  	    __func__, (rval != QLA_SUCCESS) ? "Failed to abort" : "Aborted",
  	    sp, sp->handle, fcport, rval);
  
  out:
  	/* kref_get was done before work was schedule. */
  	kref_put(&sp->cmd_kref, sp->put_fn);
  }
  
  static void qla_nvme_ls_abort(struct nvme_fc_local_port *lport,
      struct nvme_fc_remote_port *rport, struct nvmefc_ls_req *fd)
  {
  	struct nvme_private *priv = fd->private;
  	unsigned long flags;
  
  	spin_lock_irqsave(&priv->cmd_lock, flags);
  	if (!priv->sp) {
  		spin_unlock_irqrestore(&priv->cmd_lock, flags);
  		return;
  	}
  
  	if (!kref_get_unless_zero(&priv->sp->cmd_kref)) {
  		spin_unlock_irqrestore(&priv->cmd_lock, flags);
  		return;
  	}
  	spin_unlock_irqrestore(&priv->cmd_lock, flags);
  
  	INIT_WORK(&priv->abort_work, qla_nvme_abort_work);
  	schedule_work(&priv->abort_work);
  }
  
  static int qla_nvme_ls_req(struct nvme_fc_local_port *lport,
      struct nvme_fc_remote_port *rport, struct nvmefc_ls_req *fd)
  {
  	struct qla_nvme_rport *qla_rport = rport->private;
  	fc_port_t *fcport = qla_rport->fcport;
  	struct srb_iocb   *nvme;
  	struct nvme_private *priv = fd->private;
  	struct scsi_qla_host *vha;
  	int     rval = QLA_FUNCTION_FAILED;
  	struct qla_hw_data *ha;
  	srb_t           *sp;
  
  
  	if (!fcport || (fcport && fcport->deleted))
  		return rval;
  
  	vha = fcport->vha;
  	ha = vha->hw;
  
  	if (!ha->flags.fw_started)
  		return rval;
  
  	/* Alloc SRB structure */
  	sp = qla2x00_get_sp(vha, fcport, GFP_ATOMIC);
  	if (!sp)
  		return rval;
  
  	sp->type = SRB_NVME_LS;
  	sp->name = "nvme_ls";
  	sp->done = qla_nvme_sp_ls_done;
  	sp->put_fn = qla_nvme_release_ls_cmd_kref;
  	sp->priv = priv;
  	priv->sp = sp;
  	kref_init(&sp->cmd_kref);
  	spin_lock_init(&priv->cmd_lock);
  	nvme = &sp->u.iocb_cmd;
  	priv->fd = fd;
  	nvme->u.nvme.desc = fd;
  	nvme->u.nvme.dir = 0;
  	nvme->u.nvme.dl = 0;
  	nvme->u.nvme.cmd_len = fd->rqstlen;
  	nvme->u.nvme.rsp_len = fd->rsplen;
  	nvme->u.nvme.rsp_dma = fd->rspdma;
  	nvme->u.nvme.timeout_sec = fd->timeout;
  	nvme->u.nvme.cmd_dma = dma_map_single(&ha->pdev->dev, fd->rqstaddr,
  	    fd->rqstlen, DMA_TO_DEVICE);
  	dma_sync_single_for_device(&ha->pdev->dev, nvme->u.nvme.cmd_dma,
  	    fd->rqstlen, DMA_TO_DEVICE);
  
  	rval = qla2x00_start_sp(sp);
  	if (rval != QLA_SUCCESS) {
  		ql_log(ql_log_warn, vha, 0x700e,
  		    "qla2x00_start_sp failed = %d\n", rval);
  		wake_up(&sp->nvme_ls_waitq);
  		sp->priv = NULL;
  		priv->sp = NULL;
  		qla2x00_rel_sp(sp);
  		return rval;
  	}
  
  	return rval;
  }
  
  static void qla_nvme_fcp_abort(struct nvme_fc_local_port *lport,
      struct nvme_fc_remote_port *rport, void *hw_queue_handle,
      struct nvmefc_fcp_req *fd)
  {
  	struct nvme_private *priv = fd->private;
  	unsigned long flags;
  
  	spin_lock_irqsave(&priv->cmd_lock, flags);
  	if (!priv->sp) {
  		spin_unlock_irqrestore(&priv->cmd_lock, flags);
  		return;
  	}
  	if (!kref_get_unless_zero(&priv->sp->cmd_kref)) {
  		spin_unlock_irqrestore(&priv->cmd_lock, flags);
  		return;
  	}
  	spin_unlock_irqrestore(&priv->cmd_lock, flags);
  
  	INIT_WORK(&priv->abort_work, qla_nvme_abort_work);
  	schedule_work(&priv->abort_work);
  }
  
  static inline int qla2x00_start_nvme_mq(srb_t *sp)
  {
  	unsigned long   flags;
  	uint32_t        *clr_ptr;
  	uint32_t        handle;
  	struct cmd_nvme *cmd_pkt;
  	uint16_t        cnt, i;
  	uint16_t        req_cnt;
  	uint16_t        tot_dsds;
  	uint16_t	avail_dsds;
  	struct dsd64	*cur_dsd;
  	struct req_que *req = NULL;
  	struct scsi_qla_host *vha = sp->fcport->vha;
  	struct qla_hw_data *ha = vha->hw;
  	struct qla_qpair *qpair = sp->qpair;
  	struct srb_iocb *nvme = &sp->u.iocb_cmd;
  	struct scatterlist *sgl, *sg;
  	struct nvmefc_fcp_req *fd = nvme->u.nvme.desc;
  	struct nvme_fc_cmd_iu *cmd = fd->cmdaddr;
  	uint32_t        rval = QLA_SUCCESS;
  
  	/* Setup qpair pointers */
  	req = qpair->req;
  	tot_dsds = fd->sg_cnt;
  
  	/* Acquire qpair specific lock */
  	spin_lock_irqsave(&qpair->qp_lock, flags);
  
  	handle = qla2xxx_get_next_handle(req);
  	if (handle == 0) {
  		rval = -EBUSY;
  		goto queuing_error;
  	}
  	req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
  	if (req->cnt < (req_cnt + 2)) {
  		cnt = IS_SHADOW_REG_CAPABLE(ha) ? *req->out_ptr :
  		    rd_reg_dword_relaxed(req->req_q_out);
  
  		if (req->ring_index < cnt)
  			req->cnt = cnt - req->ring_index;
  		else
  			req->cnt = req->length - (req->ring_index - cnt);
  
  		if (req->cnt < (req_cnt + 2)){
  			rval = -EBUSY;
  			goto queuing_error;
  		}
  	}
  
  	if (unlikely(!fd->sqid)) {
  		if (cmd->sqe.common.opcode == nvme_admin_async_event) {
  			nvme->u.nvme.aen_op = 1;
  			atomic_inc(&ha->nvme_active_aen_cnt);
  		}
  	}
  
  	/* Build command packet. */
  	req->current_outstanding_cmd = handle;
  	req->outstanding_cmds[handle] = sp;
  	sp->handle = handle;
  	req->cnt -= req_cnt;
  
  	cmd_pkt = (struct cmd_nvme *)req->ring_ptr;
  	cmd_pkt->handle = make_handle(req->id, handle);
  
  	/* Zero out remaining portion of packet. */
  	clr_ptr = (uint32_t *)cmd_pkt + 2;
  	memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
  
  	cmd_pkt->entry_status = 0;
  
  	/* Update entry type to indicate Command NVME IOCB */
  	cmd_pkt->entry_type = COMMAND_NVME;
  
  	/* No data transfer how do we check buffer len == 0?? */
  	if (fd->io_dir == NVMEFC_FCP_READ) {
  		cmd_pkt->control_flags = cpu_to_le16(CF_READ_DATA);
  		qpair->counters.input_bytes += fd->payload_length;
  		qpair->counters.input_requests++;
  	} else if (fd->io_dir == NVMEFC_FCP_WRITE) {
  		cmd_pkt->control_flags = cpu_to_le16(CF_WRITE_DATA);
  		if ((vha->flags.nvme_first_burst) &&
  		    (sp->fcport->nvme_prli_service_param &
  			NVME_PRLI_SP_FIRST_BURST)) {
  			if ((fd->payload_length <=
  			    sp->fcport->nvme_first_burst_size) ||
  				(sp->fcport->nvme_first_burst_size == 0))
  				cmd_pkt->control_flags |=
  					cpu_to_le16(CF_NVME_FIRST_BURST_ENABLE);
  		}
  		qpair->counters.output_bytes += fd->payload_length;
  		qpair->counters.output_requests++;
  	} else if (fd->io_dir == 0) {
  		cmd_pkt->control_flags = 0;
  	}
  	/* Set BIT_13 of control flags for Async event */
  	if (vha->flags.nvme2_enabled &&
  	    cmd->sqe.common.opcode == nvme_admin_async_event) {
  		cmd_pkt->control_flags |= cpu_to_le16(CF_ADMIN_ASYNC_EVENT);
  	}
  
  	/* Set NPORT-ID */
  	cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
  	cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
  	cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
  	cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
  	cmd_pkt->vp_index = sp->fcport->vha->vp_idx;
  
  	/* NVME RSP IU */
  	cmd_pkt->nvme_rsp_dsd_len = cpu_to_le16(fd->rsplen);
  	put_unaligned_le64(fd->rspdma, &cmd_pkt->nvme_rsp_dseg_address);
  
  	/* NVME CNMD IU */
  	cmd_pkt->nvme_cmnd_dseg_len = cpu_to_le16(fd->cmdlen);
  	cmd_pkt->nvme_cmnd_dseg_address = cpu_to_le64(fd->cmddma);
  
  	cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
  	cmd_pkt->byte_count = cpu_to_le32(fd->payload_length);
  
  	/* One DSD is available in the Command Type NVME IOCB */
  	avail_dsds = 1;
  	cur_dsd = &cmd_pkt->nvme_dsd;
  	sgl = fd->first_sgl;
  
  	/* Load data segments */
  	for_each_sg(sgl, sg, tot_dsds, i) {
  		cont_a64_entry_t *cont_pkt;
  
  		/* Allocate additional continuation packets? */
  		if (avail_dsds == 0) {
  			/*
  			 * Five DSDs are available in the Continuation
  			 * Type 1 IOCB.
  			 */
  
  			/* Adjust ring index */
  			req->ring_index++;
  			if (req->ring_index == req->length) {
  				req->ring_index = 0;
  				req->ring_ptr = req->ring;
  			} else {
  				req->ring_ptr++;
  			}
  			cont_pkt = (cont_a64_entry_t *)req->ring_ptr;
  			put_unaligned_le32(CONTINUE_A64_TYPE,
  					   &cont_pkt->entry_type);
  
  			cur_dsd = cont_pkt->dsd;
  			avail_dsds = ARRAY_SIZE(cont_pkt->dsd);
  		}
  
  		append_dsd64(&cur_dsd, sg);
  		avail_dsds--;
  	}
  
  	/* Set total entry count. */
  	cmd_pkt->entry_count = (uint8_t)req_cnt;
  	wmb();
  
  	/* Adjust ring index. */
  	req->ring_index++;
  	if (req->ring_index == req->length) {
  		req->ring_index = 0;
  		req->ring_ptr = req->ring;
  	} else {
  		req->ring_ptr++;
  	}
  
  	/* Set chip new ring index. */
  	wrt_reg_dword(req->req_q_in, req->ring_index);
  
  queuing_error:
  	spin_unlock_irqrestore(&qpair->qp_lock, flags);
  	return rval;
  }
  
  /* Post a command */
  static int qla_nvme_post_cmd(struct nvme_fc_local_port *lport,
      struct nvme_fc_remote_port *rport, void *hw_queue_handle,
      struct nvmefc_fcp_req *fd)
  {
  	fc_port_t *fcport;
  	struct srb_iocb *nvme;
  	struct scsi_qla_host *vha;
  	int rval;
  	srb_t *sp;
  	struct qla_qpair *qpair = hw_queue_handle;
  	struct nvme_private *priv = fd->private;
  	struct qla_nvme_rport *qla_rport = rport->private;
  
  	if (!priv) {
  		/* nvme association has been torn down */
  		return -ENODEV;
  	}
  
  	fcport = qla_rport->fcport;
  
  	if (!qpair || !fcport)
  		return -ENODEV;
  
  	if (!qpair->fw_started || fcport->deleted)
  		return -EBUSY;
  
  	vha = fcport->vha;
  
  	if (!(fcport->nvme_flag & NVME_FLAG_REGISTERED))
  		return -ENODEV;
  
  	if (test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags) ||
  	    (qpair && !qpair->fw_started) || fcport->deleted)
  		return -EBUSY;
  
  	/*
  	 * If we know the dev is going away while the transport is still sending
  	 * IO's return busy back to stall the IO Q.  This happens when the
  	 * link goes away and fw hasn't notified us yet, but IO's are being
  	 * returned. If the dev comes back quickly we won't exhaust the IO
  	 * retry count at the core.
  	 */
  	if (fcport->nvme_flag & NVME_FLAG_RESETTING)
  		return -EBUSY;
  
  	/* Alloc SRB structure */
  	sp = qla2xxx_get_qpair_sp(vha, qpair, fcport, GFP_ATOMIC);
  	if (!sp)
  		return -EBUSY;
  
  	init_waitqueue_head(&sp->nvme_ls_waitq);
  	kref_init(&sp->cmd_kref);
  	spin_lock_init(&priv->cmd_lock);
  	sp->priv = priv;
  	priv->sp = sp;
  	sp->type = SRB_NVME_CMD;
  	sp->name = "nvme_cmd";
  	sp->done = qla_nvme_sp_done;
  	sp->put_fn = qla_nvme_release_fcp_cmd_kref;
  	sp->qpair = qpair;
  	sp->vha = vha;
  	nvme = &sp->u.iocb_cmd;
  	nvme->u.nvme.desc = fd;
  
  	rval = qla2x00_start_nvme_mq(sp);
  	if (rval != QLA_SUCCESS) {
  		ql_log(ql_log_warn, vha, 0x212d,
  		    "qla2x00_start_nvme_mq failed = %d\n", rval);
  		wake_up(&sp->nvme_ls_waitq);
  		sp->priv = NULL;
  		priv->sp = NULL;
  		qla2xxx_rel_qpair_sp(sp->qpair, sp);
  	}
  
  	return rval;
  }
  
  static void qla_nvme_localport_delete(struct nvme_fc_local_port *lport)
  {
  	struct scsi_qla_host *vha = lport->private;
  
  	ql_log(ql_log_info, vha, 0x210f,
  	    "localport delete of %p completed.\n", vha->nvme_local_port);
  	vha->nvme_local_port = NULL;
  	complete(&vha->nvme_del_done);
  }
  
  static void qla_nvme_remoteport_delete(struct nvme_fc_remote_port *rport)
  {
  	fc_port_t *fcport;
  	struct qla_nvme_rport *qla_rport = rport->private;
  
  	fcport = qla_rport->fcport;
  	fcport->nvme_remote_port = NULL;
  	fcport->nvme_flag &= ~NVME_FLAG_REGISTERED;
  	fcport->nvme_flag &= ~NVME_FLAG_DELETING;
  	ql_log(ql_log_info, fcport->vha, 0x2110,
  	    "remoteport_delete of %p %8phN completed.\n",
  	    fcport, fcport->port_name);
  	complete(&fcport->nvme_del_done);
  }
  
  static struct nvme_fc_port_template qla_nvme_fc_transport = {
  	.localport_delete = qla_nvme_localport_delete,
  	.remoteport_delete = qla_nvme_remoteport_delete,
  	.create_queue   = qla_nvme_alloc_queue,
  	.delete_queue 	= NULL,
  	.ls_req		= qla_nvme_ls_req,
  	.ls_abort	= qla_nvme_ls_abort,
  	.fcp_io		= qla_nvme_post_cmd,
  	.fcp_abort	= qla_nvme_fcp_abort,
  	.max_hw_queues  = 8,
  	.max_sgl_segments = 1024,
  	.max_dif_sgl_segments = 64,
  	.dma_boundary = 0xFFFFFFFF,
  	.local_priv_sz  = 8,
  	.remote_priv_sz = sizeof(struct qla_nvme_rport),
  	.lsrqst_priv_sz = sizeof(struct nvme_private),
  	.fcprqst_priv_sz = sizeof(struct nvme_private),
  };
  
  void qla_nvme_unregister_remote_port(struct fc_port *fcport)
  {
  	int ret;
  
  	if (!IS_ENABLED(CONFIG_NVME_FC))
  		return;
  
  	ql_log(ql_log_warn, NULL, 0x2112,
  	    "%s: unregister remoteport on %p %8phN\n",
  	    __func__, fcport, fcport->port_name);
  
  	if (test_bit(PFLG_DRIVER_REMOVING, &fcport->vha->pci_flags))
  		nvme_fc_set_remoteport_devloss(fcport->nvme_remote_port, 0);
  
  	init_completion(&fcport->nvme_del_done);
  	ret = nvme_fc_unregister_remoteport(fcport->nvme_remote_port);
  	if (ret)
  		ql_log(ql_log_info, fcport->vha, 0x2114,
  			"%s: Failed to unregister nvme_remote_port (%d)\n",
  			    __func__, ret);
  	wait_for_completion(&fcport->nvme_del_done);
  }
  
  void qla_nvme_delete(struct scsi_qla_host *vha)
  {
  	int nv_ret;
  
  	if (!IS_ENABLED(CONFIG_NVME_FC))
  		return;
  
  	if (vha->nvme_local_port) {
  		init_completion(&vha->nvme_del_done);
  		ql_log(ql_log_info, vha, 0x2116,
  			"unregister localport=%p\n",
  			vha->nvme_local_port);
  		nv_ret = nvme_fc_unregister_localport(vha->nvme_local_port);
  		if (nv_ret)
  			ql_log(ql_log_info, vha, 0x2115,
  			    "Unregister of localport failed\n");
  		else
  			wait_for_completion(&vha->nvme_del_done);
  	}
  }
  
  int qla_nvme_register_hba(struct scsi_qla_host *vha)
  {
  	struct nvme_fc_port_template *tmpl;
  	struct qla_hw_data *ha;
  	struct nvme_fc_port_info pinfo;
  	int ret = -EINVAL;
  
  	if (!IS_ENABLED(CONFIG_NVME_FC))
  		return ret;
  
  	ha = vha->hw;
  	tmpl = &qla_nvme_fc_transport;
  
  	WARN_ON(vha->nvme_local_port);
  
  	if (ha->max_req_queues < 3) {
  		if (!ha->flags.max_req_queue_warned)
  			ql_log(ql_log_info, vha, 0x2120,
  			       "%s: Disabling FC-NVME due to lack of free queue pairs (%d).\n",
  			       __func__, ha->max_req_queues);
  		ha->flags.max_req_queue_warned = 1;
  		return ret;
  	}
  
  	qla_nvme_fc_transport.max_hw_queues =
  	    min((uint8_t)(qla_nvme_fc_transport.max_hw_queues),
  		(uint8_t)(ha->max_req_queues - 2));
  
  	pinfo.node_name = wwn_to_u64(vha->node_name);
  	pinfo.port_name = wwn_to_u64(vha->port_name);
  	pinfo.port_role = FC_PORT_ROLE_NVME_INITIATOR;
  	pinfo.port_id = vha->d_id.b24;
  
  	ql_log(ql_log_info, vha, 0xffff,
  	    "register_localport: host-traddr=nn-0x%llx:pn-0x%llx on portID:%x\n",
  	    pinfo.node_name, pinfo.port_name, pinfo.port_id);
  	qla_nvme_fc_transport.dma_boundary = vha->host->dma_boundary;
  
  	ret = nvme_fc_register_localport(&pinfo, tmpl,
  	    get_device(&ha->pdev->dev), &vha->nvme_local_port);
  	if (ret) {
  		ql_log(ql_log_warn, vha, 0xffff,
  		    "register_localport failed: ret=%x\n", ret);
  	} else {
  		vha->nvme_local_port->private = vha;
  	}
  
  	return ret;
  }
  