Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 926 insertions, 0 deletions

diff --git a/drivers/scsi/qla2xxx/qla_nvme.c b/drivers/scsi/qla2xxx/qla_nvme.c
new file mode 100644
index 000000000..9941b38ea
--- /dev/null
+++ b/drivers/scsi/qla2xxx/qla_nvme.c
@@ -0,0 +1,926 @@
+// 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>
+#include <linux/blk-mq-pci.h>
+#include <linux/blk-mq.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 = fcport->dev_loss_tmo;
+
+	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;
+	}
+
+	nvme_fc_set_remoteport_devloss(fcport->nvme_remote_port,
+				       fcport->dev_loss_tmo);
+
+	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;
+
+	/* Map admin queue and 1st IO queue to index 0 */
+	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;
+	}
+
+	/* Use base qpair if max_qpairs is 0 */
+	if (!ha->max_qpairs) {
+		qpair = ha->base_qpair;
+	} else {
+		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) {
+			ql_log(ql_log_warn, vha, 0x2122,
+			       "Failed to allocate qpair\n");
+			return -EINVAL;
+		}
+		qla_adjust_iocb_limit(vha);
+	}
+	*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, abts_done_called = 1;
+	bool io_wait_for_abort_done;
+	uint32_t handle;
+
+	ql_dbg(ql_dbg_io, fcport->vha, 0xffff,
+	       "%s called for sp=%p, hndl=%x on fcport=%p desc=%p deleted=%d\n",
+	       __func__, sp, sp->handle, fcport, sp->u.iocb_cmd.u.nvme.desc, fcport->deleted);
+
+	if (!ha->flags.fw_started || fcport->deleted == QLA_SESS_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;
+	}
+
+	/*
+	 * sp may not be valid after abort_command if return code is either
+	 * SUCCESS or ERR_FROM_FW codes, so cache the value here.
+	 */
+	io_wait_for_abort_done = ql2xabts_wait_nvme &&
+					QLA_ABTS_WAIT_ENABLED(sp);
+	handle = sp->handle;
+
+	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, handle, fcport, rval);
+
+	/*
+	 * If async tmf is enabled, the abort callback is called only on
+	 * return codes QLA_SUCCESS and QLA_ERR_FROM_FW.
+	 */
+	if (ql2xasynctmfenable &&
+	    rval != QLA_SUCCESS && rval != QLA_ERR_FROM_FW)
+		abts_done_called = 0;
+
+	/*
+	 * Returned before decreasing kref so that I/O requests
+	 * are waited until ABTS complete. This kref is decreased
+	 * at qla24xx_abort_sp_done function.
+	 */
+	if (abts_done_called && io_wait_for_abort_done)
+		return;
+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->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 = fd->rqstdma;
+	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);
+		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 rsp_que *rsp = 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;
+	rsp = qpair->rsp;
+	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);
+
+	sp->iores.res_type = RESOURCE_IOCB | RESOURCE_EXCH;
+	sp->iores.exch_cnt = 1;
+	sp->iores.iocb_cnt = req_cnt;
+	if (qla_get_fw_resources(sp->qpair, &sp->iores)) {
+		rval = -EBUSY;
+		goto queuing_error;
+	}
+
+	if (req->cnt < (req_cnt + 2)) {
+		if (IS_SHADOW_REG_CAPABLE(ha)) {
+			cnt = *req->out_ptr;
+		} else {
+			cnt = rd_reg_dword_relaxed(req->req_q_out);
+			if (qla2x00_check_reg16_for_disconnect(vha, cnt)) {
+				rval = -EBUSY;
+				goto queuing_error;
+			}
+		}
+
+		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;
+	}
+
+	if (sp->fcport->edif.enable && fd->io_dir != 0)
+		cmd_pkt->control_flags |= cpu_to_le16(CF_EN_EDIF);
+
+	/* 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++;
+	}
+
+	/* ignore nvme async cmd due to long timeout */
+	if (!nvme->u.nvme.aen_op)
+		sp->qpair->cmd_cnt++;
+
+	/* Set chip new ring index. */
+	wrt_reg_dword(req->req_q_in, req->ring_index);
+
+	if (vha->flags.process_response_queue &&
+	    rsp->ring_ptr->signature != RESPONSE_PROCESSED)
+		qla24xx_process_response_queue(vha, rsp);
+
+queuing_error:
+	if (rval)
+		qla_put_fw_resources(sp->qpair, &sp->iores);
+	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;
+	struct qla_hw_data *ha;
+	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 (unlikely(!qpair || !fcport || fcport->deleted))
+		return -EBUSY;
+
+	if (!(fcport->nvme_flag & NVME_FLAG_REGISTERED))
+		return -ENODEV;
+
+	vha = fcport->vha;
+	ha = vha->hw;
+
+	if (test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags))
+		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;
+
+	qpair = qla_mapq_nvme_select_qpair(ha, qpair);
+
+	/* Alloc SRB structure */
+	sp = qla2xxx_get_qpair_sp(vha, qpair, fcport, GFP_ATOMIC);
+	if (!sp)
+		return -EBUSY;
+
+	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;
+	sp->cmd_sp = sp;
+	nvme = &sp->u.iocb_cmd;
+	nvme->u.nvme.desc = fd;
+
+	rval = qla2x00_start_nvme_mq(sp);
+	if (rval != QLA_SUCCESS) {
+		ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x212d,
+		    "qla2x00_start_nvme_mq failed = %d\n", rval);
+		sp->priv = NULL;
+		priv->sp = NULL;
+		qla2xxx_rel_qpair_sp(sp->qpair, sp);
+	}
+
+	return rval;
+}
+
+static void qla_nvme_map_queues(struct nvme_fc_local_port *lport,
+		struct blk_mq_queue_map *map)
+{
+	struct scsi_qla_host *vha = lport->private;
+
+	blk_mq_pci_map_queues(map, vha->hw->pdev, vha->irq_offset);
+}
+
+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,
+	.map_queues	= qla_nvme_map_queues,
+	.max_hw_queues  = DEF_NVME_HW_QUEUES,
+	.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, fcport->vha, 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;
+
+	if (ql2xnvme_queues < MIN_NVME_HW_QUEUES) {
+		ql_log(ql_log_warn, vha, 0xfffd,
+		    "ql2xnvme_queues=%d is lower than minimum queues: %d. Resetting ql2xnvme_queues to:%d\n",
+		    ql2xnvme_queues, MIN_NVME_HW_QUEUES, DEF_NVME_HW_QUEUES);
+		ql2xnvme_queues = DEF_NVME_HW_QUEUES;
+	} else if (ql2xnvme_queues > (ha->max_qpairs - 1)) {
+		ql_log(ql_log_warn, vha, 0xfffd,
+		       "ql2xnvme_queues=%d is greater than available IRQs: %d. Resetting ql2xnvme_queues to: %d\n",
+		       ql2xnvme_queues, (ha->max_qpairs - 1),
+		       (ha->max_qpairs - 1));
+		ql2xnvme_queues = ((ha->max_qpairs - 1));
+	}
+
+	qla_nvme_fc_transport.max_hw_queues =
+	    min((uint8_t)(ql2xnvme_queues),
+		(uint8_t)((ha->max_qpairs - 1) ? (ha->max_qpairs - 1) : 1));
+
+	ql_log(ql_log_info, vha, 0xfffb,
+	       "Number of NVME queues used for this port: %d\n",
+	    qla_nvme_fc_transport.max_hw_queues);
+
+	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;
+
+	mutex_lock(&ha->vport_lock);
+	/*
+	 * Check again for nvme_local_port to see if any other thread raced
+	 * with this one and finished registration.
+	 */
+	if (!vha->nvme_local_port) {
+		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);
+		mutex_unlock(&ha->vport_lock);
+	} else {
+		mutex_unlock(&ha->vport_lock);
+		return 0;
+	}
+	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;
+}
+
+void qla_nvme_abort_set_option(struct abort_entry_24xx *abt, srb_t *orig_sp)
+{
+	struct qla_hw_data *ha;
+
+	if (!(ql2xabts_wait_nvme && QLA_ABTS_WAIT_ENABLED(orig_sp)))
+		return;
+
+	ha = orig_sp->fcport->vha->hw;
+
+	WARN_ON_ONCE(abt->options & cpu_to_le16(BIT_0));
+	/* Use Driver Specified Retry Count */
+	abt->options |= cpu_to_le16(AOF_ABTS_RTY_CNT);
+	abt->drv.abts_rty_cnt = cpu_to_le16(2);
+	/* Use specified response timeout */
+	abt->options |= cpu_to_le16(AOF_RSP_TIMEOUT);
+	/* set it to 2 * r_a_tov in secs */
+	abt->drv.rsp_timeout = cpu_to_le16(2 * (ha->r_a_tov / 10));
+}
+
+void qla_nvme_abort_process_comp_status(struct abort_entry_24xx *abt, srb_t *orig_sp)
+{
+	u16	comp_status;
+	struct scsi_qla_host *vha;
+
+	if (!(ql2xabts_wait_nvme && QLA_ABTS_WAIT_ENABLED(orig_sp)))
+		return;
+
+	vha = orig_sp->fcport->vha;
+
+	comp_status = le16_to_cpu(abt->comp_status);
+	switch (comp_status) {
+	case CS_RESET:		/* reset event aborted */
+	case CS_ABORTED:	/* IOCB was cleaned */
+	/* N_Port handle is not currently logged in */
+	case CS_TIMEOUT:
+	/* N_Port handle was logged out while waiting for ABTS to complete */
+	case CS_PORT_UNAVAILABLE:
+	/* Firmware found that the port name changed */
+	case CS_PORT_LOGGED_OUT:
+	/* BA_RJT was received for the ABTS */
+	case CS_PORT_CONFIG_CHG:
+		ql_dbg(ql_dbg_async, vha, 0xf09d,
+		       "Abort I/O IOCB completed with error, comp_status=%x\n",
+		comp_status);
+		break;
+
+	/* BA_RJT was received for the ABTS */
+	case CS_REJECT_RECEIVED:
+		ql_dbg(ql_dbg_async, vha, 0xf09e,
+		       "BA_RJT was received for the ABTS rjt_vendorUnique = %u",
+			abt->fw.ba_rjt_vendorUnique);
+		ql_dbg(ql_dbg_async + ql_dbg_mbx, vha, 0xf09e,
+		       "ba_rjt_reasonCodeExpl = %u, ba_rjt_reasonCode = %u\n",
+		       abt->fw.ba_rjt_reasonCodeExpl, abt->fw.ba_rjt_reasonCode);
+		break;
+
+	case CS_COMPLETE:
+		ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0xf09f,
+		       "IOCB request is completed successfully comp_status=%x\n",
+		comp_status);
+		break;
+
+	case CS_IOCB_ERROR:
+		ql_dbg(ql_dbg_async, vha, 0xf0a0,
+		       "IOCB request is failed, comp_status=%x\n", comp_status);
+		break;
+
+	default:
+		ql_dbg(ql_dbg_async, vha, 0xf0a1,
+		       "Invalid Abort IO IOCB Completion Status %x\n",
+		comp_status);
+		break;
+	}
+}
+
+inline void qla_wait_nvme_release_cmd_kref(srb_t *orig_sp)
+{
+	if (!(ql2xabts_wait_nvme && QLA_ABTS_WAIT_ENABLED(orig_sp)))
+		return;
+	kref_put(&orig_sp->cmd_kref, orig_sp->put_fn);
+}