scsi: lpfc: Separate NVMET RQ buffer posting from IO resources SGL/iocbq/context

Currently IO resources are mapped 1 to 1 with RQ buffers posted

Added logic to separate RQE buffers from IO op resources
(sgl/iocbq/context). During initialization, the driver will determine
how many SGLs it will allocate for NVMET (based on what the firmware
reports) and associate a NVMET IOCBq and NVMET context structure with
each one.

Now that hdr/data buffers are immediately reposted back to the RQ, 512
RQEs for each MRQ is sufficient. Also, since NVMET data buffers are now
128 bytes, lpfc_nvmet_mrq_post is not necessary anymore as we will
always post the max (512) buffers per NVMET MRQ.
Signed-off-by: NDick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: NJames Smart <james.smart@broadcom.com>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/lpfc/lpfc.h

@@ -141,6 +141,13 @@ struct lpfc_dmabuf {
 	uint32_t   buffer_tag;	/* used for tagged queue ring */
 };
 
+struct lpfc_nvmet_ctxbuf {
+	struct list_head list;
+	struct lpfc_nvmet_rcv_ctx *context;
+	struct lpfc_iocbq *iocbq;
+	struct lpfc_sglq *sglq;
+};
+
 struct lpfc_dma_pool {
 	struct lpfc_dmabuf   *elements;
 	uint32_t    max_count;
@@ -163,9 +170,6 @@ struct rqb_dmabuf {
 	struct lpfc_dmabuf dbuf;
 	uint16_t total_size;
 	uint16_t bytes_recv;
-	void *context;
-	struct lpfc_iocbq *iocbq;
-	struct lpfc_sglq *sglq;
 	struct lpfc_queue *hrq;	  /* ptr to associated Header RQ */
 	struct lpfc_queue *drq;	  /* ptr to associated Data RQ */
 };
@@ -777,7 +781,6 @@ struct lpfc_hba {
 	uint32_t cfg_nvme_oas;
 	uint32_t cfg_nvme_io_channel;
 	uint32_t cfg_nvmet_mrq;
-	uint32_t cfg_nvmet_mrq_post;
 	uint32_t cfg_enable_nvmet;
 	uint32_t cfg_nvme_enable_fb;
 	uint32_t cfg_nvmet_fb_size;

drivers/scsi/lpfc/lpfc_attr.c

@@ -3315,14 +3315,6 @@ LPFC_ATTR_R(nvmet_mrq,
 	    1, 1, 16,
 	    "Specify number of RQ pairs for processing NVMET cmds");
 
-/*
- * lpfc_nvmet_mrq_post: Specify number buffers to post on every MRQ
- *
- */
-LPFC_ATTR_R(nvmet_mrq_post, LPFC_DEF_MRQ_POST,
-	    LPFC_MIN_MRQ_POST, LPFC_MAX_MRQ_POST,
-	    "Specify number of buffers to post on every MRQ");
-
 /*
  * lpfc_enable_fc4_type: Defines what FC4 types are supported.
  * Supported Values:  1 - register just FCP
@@ -5158,7 +5150,6 @@ struct device_attribute *lpfc_hba_attrs[] = {
 	&dev_attr_lpfc_suppress_rsp,
 	&dev_attr_lpfc_nvme_io_channel,
 	&dev_attr_lpfc_nvmet_mrq,
-	&dev_attr_lpfc_nvmet_mrq_post,
 	&dev_attr_lpfc_nvme_enable_fb,
 	&dev_attr_lpfc_nvmet_fb_size,
 	&dev_attr_lpfc_enable_bg,
@@ -6198,7 +6189,6 @@ lpfc_get_cfgparam(struct lpfc_hba *phba)
 
 	lpfc_enable_fc4_type_init(phba, lpfc_enable_fc4_type);
 	lpfc_nvmet_mrq_init(phba, lpfc_nvmet_mrq);
-	lpfc_nvmet_mrq_post_init(phba, lpfc_nvmet_mrq_post);
 
 	/* Initialize first burst. Target vs Initiator are different. */
 	lpfc_nvme_enable_fb_init(phba, lpfc_nvme_enable_fb);
@@ -6295,7 +6285,6 @@ lpfc_nvme_mod_param_dep(struct lpfc_hba *phba)
 		/* Not NVME Target mode.  Turn off Target parameters. */
 		phba->nvmet_support = 0;
 		phba->cfg_nvmet_mrq = 0;
-		phba->cfg_nvmet_mrq_post = 0;
 		phba->cfg_nvmet_fb_size = 0;
 	}
 

drivers/scsi/lpfc/lpfc_crtn.h

@@ -75,6 +75,8 @@ void lpfc_init_vpi_cmpl(struct lpfc_hba *, LPFC_MBOXQ_t *);
 void lpfc_cancel_all_vport_retry_delay_timer(struct lpfc_hba *);
 void lpfc_retry_pport_discovery(struct lpfc_hba *);
 void lpfc_release_rpi(struct lpfc_hba *, struct lpfc_vport *, uint16_t);
+int lpfc_init_iocb_list(struct lpfc_hba *phba, int cnt);
+void lpfc_free_iocb_list(struct lpfc_hba *phba);
 
 void lpfc_mbx_cmpl_local_config_link(struct lpfc_hba *, LPFC_MBOXQ_t *);
 void lpfc_mbx_cmpl_reg_login(struct lpfc_hba *, LPFC_MBOXQ_t *);
@@ -246,16 +248,14 @@ struct hbq_dmabuf *lpfc_sli4_rb_alloc(struct lpfc_hba *);
 void lpfc_sli4_rb_free(struct lpfc_hba *, struct hbq_dmabuf *);
 struct rqb_dmabuf *lpfc_sli4_nvmet_alloc(struct lpfc_hba *phba);
 void lpfc_sli4_nvmet_free(struct lpfc_hba *phba, struct rqb_dmabuf *dmab);
-void lpfc_nvmet_rq_post(struct lpfc_hba *phba, struct lpfc_nvmet_rcv_ctx *ctxp,
-			struct lpfc_dmabuf *mp);
+void lpfc_nvmet_ctxbuf_post(struct lpfc_hba *phba,
+			    struct lpfc_nvmet_ctxbuf *ctxp);
 int lpfc_nvmet_rcv_unsol_abort(struct lpfc_vport *vport,
 			       struct fc_frame_header *fc_hdr);
 void lpfc_sli4_build_dflt_fcf_record(struct lpfc_hba *, struct fcf_record *,
 			uint16_t);
 int lpfc_sli4_rq_put(struct lpfc_queue *hq, struct lpfc_queue *dq,
 		     struct lpfc_rqe *hrqe, struct lpfc_rqe *drqe);
-int lpfc_post_rq_buffer(struct lpfc_hba *phba, struct lpfc_queue *hq,
-			struct lpfc_queue *dq, int count);
 int lpfc_free_rq_buffer(struct lpfc_hba *phba, struct lpfc_queue *hq);
 void lpfc_unregister_fcf(struct lpfc_hba *);
 void lpfc_unregister_fcf_rescan(struct lpfc_hba *);

drivers/scsi/lpfc/lpfc_init.c

@@ -1099,7 +1099,7 @@ lpfc_hba_down_post_s4(struct lpfc_hba *phba)
 
 		list_for_each_entry_safe(ctxp, ctxp_next, &nvmet_aborts, list) {
 			ctxp->flag &= ~(LPFC_NVMET_XBUSY | LPFC_NVMET_ABORT_OP);
-			lpfc_nvmet_rq_post(phba, ctxp, &ctxp->rqb_buffer->hbuf);
+			lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
 		}
 	}
 
@@ -3381,7 +3381,7 @@ lpfc_sli4_nvmet_sgl_update(struct lpfc_hba *phba)
 {
 	struct lpfc_sglq *sglq_entry = NULL, *sglq_entry_next = NULL;
 	uint16_t i, lxri, xri_cnt, els_xri_cnt;
-	uint16_t nvmet_xri_cnt, tot_cnt;
+	uint16_t nvmet_xri_cnt;
 	LIST_HEAD(nvmet_sgl_list);
 	int rc;
 
@@ -3389,20 +3389,9 @@ lpfc_sli4_nvmet_sgl_update(struct lpfc_hba *phba)
 	 * update on pci function's nvmet xri-sgl list
 	 */
 	els_xri_cnt = lpfc_sli4_get_els_iocb_cnt(phba);
-	nvmet_xri_cnt = phba->cfg_nvmet_mrq * phba->cfg_nvmet_mrq_post;
 
-	/* Ensure we at least meet the minimun for the system */
-	if (nvmet_xri_cnt < LPFC_NVMET_RQE_DEF_COUNT)
-		nvmet_xri_cnt = LPFC_NVMET_RQE_DEF_COUNT;
-
-	tot_cnt = phba->sli4_hba.max_cfg_param.max_xri - els_xri_cnt;
-	if (nvmet_xri_cnt > tot_cnt) {
-		phba->cfg_nvmet_mrq_post = tot_cnt / phba->cfg_nvmet_mrq;
-		nvmet_xri_cnt = phba->cfg_nvmet_mrq * phba->cfg_nvmet_mrq_post;
-		lpfc_printf_log(phba, KERN_INFO, LOG_SLI,
-				"6301 NVMET post-sgl count changed to %d\n",
-				phba->cfg_nvmet_mrq_post);
-	}
+	/* For NVMET, ALL remaining XRIs are dedicated for IO processing */
+	nvmet_xri_cnt = phba->sli4_hba.max_cfg_param.max_xri - els_xri_cnt;
 
 	if (nvmet_xri_cnt > phba->sli4_hba.nvmet_xri_cnt) {
 		/* els xri-sgl expanded */
@@ -5835,6 +5824,8 @@ lpfc_sli4_driver_resource_setup(struct lpfc_hba *phba)
 		spin_lock_init(&phba->sli4_hba.abts_nvme_buf_list_lock);
 		INIT_LIST_HEAD(&phba->sli4_hba.lpfc_abts_nvme_buf_list);
 		INIT_LIST_HEAD(&phba->sli4_hba.lpfc_abts_nvmet_ctx_list);
+		INIT_LIST_HEAD(&phba->sli4_hba.lpfc_nvmet_ctx_list);
+
 		/* Fast-path XRI aborted CQ Event work queue list */
 		INIT_LIST_HEAD(&phba->sli4_hba.sp_nvme_xri_aborted_work_queue);
 	}
@@ -6279,7 +6270,7 @@ lpfc_unset_driver_resource_phase2(struct lpfc_hba *phba)
  *
  * This routine is invoked to free the driver's IOCB list and memory.
  **/
-static void
+void
 lpfc_free_iocb_list(struct lpfc_hba *phba)
 {
 	struct lpfc_iocbq *iocbq_entry = NULL, *iocbq_next = NULL;
@@ -6307,7 +6298,7 @@ lpfc_free_iocb_list(struct lpfc_hba *phba)
  *	0 - successful
  *	other values - error
  **/
-static int
+int
 lpfc_init_iocb_list(struct lpfc_hba *phba, int iocb_count)
 {
 	struct lpfc_iocbq *iocbq_entry = NULL;
@@ -8321,46 +8312,6 @@ lpfc_sli4_queue_destroy(struct lpfc_hba *phba)
 	INIT_LIST_HEAD(&phba->sli4_hba.lpfc_wq_list);
 }
 
-int
-lpfc_post_rq_buffer(struct lpfc_hba *phba, struct lpfc_queue *hrq,
-		    struct lpfc_queue *drq, int count)
-{
-	int rc, i;
-	struct lpfc_rqe hrqe;
-	struct lpfc_rqe drqe;
-	struct lpfc_rqb *rqbp;
-	struct rqb_dmabuf *rqb_buffer;
-	LIST_HEAD(rqb_buf_list);
-
-	rqbp = hrq->rqbp;
-	for (i = 0; i < count; i++) {
-		rqb_buffer = (rqbp->rqb_alloc_buffer)(phba);
-		if (!rqb_buffer)
-			break;
-		rqb_buffer->hrq = hrq;
-		rqb_buffer->drq = drq;
-		list_add_tail(&rqb_buffer->hbuf.list, &rqb_buf_list);
-	}
-	while (!list_empty(&rqb_buf_list)) {
-		list_remove_head(&rqb_buf_list, rqb_buffer, struct rqb_dmabuf,
-				 hbuf.list);
-
-		hrqe.address_lo = putPaddrLow(rqb_buffer->hbuf.phys);
-		hrqe.address_hi = putPaddrHigh(rqb_buffer->hbuf.phys);
-		drqe.address_lo = putPaddrLow(rqb_buffer->dbuf.phys);
-		drqe.address_hi = putPaddrHigh(rqb_buffer->dbuf.phys);
-		rc = lpfc_sli4_rq_put(hrq, drq, &hrqe, &drqe);
-		if (rc < 0) {
-			(rqbp->rqb_free_buffer)(phba, rqb_buffer);
-		} else {
-			list_add_tail(&rqb_buffer->hbuf.list,
-				      &rqbp->rqb_buffer_list);
-			rqbp->buffer_count++;
-		}
-	}
-	return 1;
-}
-
 int
 lpfc_free_rq_buffer(struct lpfc_hba *phba, struct lpfc_queue *rq)
 {
@@ -11103,7 +11054,7 @@ lpfc_pci_probe_one_s4(struct pci_dev *pdev, const struct pci_device_id *pid)
 	struct lpfc_hba   *phba;
 	struct lpfc_vport *vport = NULL;
 	struct Scsi_Host  *shost = NULL;
-	int error, cnt, num;
+	int error;
 	uint32_t cfg_mode, intr_mode;
 
 	/* Allocate memory for HBA structure */
@@ -11137,27 +11088,6 @@ lpfc_pci_probe_one_s4(struct pci_dev *pdev, const struct pci_device_id *pid)
 		goto out_unset_pci_mem_s4;
 	}
 
-	cnt = phba->cfg_iocb_cnt * 1024;
-	if (phba->nvmet_support) {
-		/* Ensure we at least meet the minimun for the system */
-		num = (phba->cfg_nvmet_mrq_post * phba->cfg_nvmet_mrq);
-		if (num < LPFC_NVMET_RQE_DEF_COUNT)
-			num = LPFC_NVMET_RQE_DEF_COUNT;
-		cnt += num;
-	}
-
-	/* Initialize and populate the iocb list per host */
-	lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
-			"2821 initialize iocb list %d total %d\n",
-			phba->cfg_iocb_cnt, cnt);
-	error = lpfc_init_iocb_list(phba, cnt);
-
-	if (error) {
-		lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
-				"1413 Failed to initialize iocb list.\n");
-		goto out_unset_driver_resource_s4;
-	}
-
 	INIT_LIST_HEAD(&phba->active_rrq_list);
 	INIT_LIST_HEAD(&phba->fcf.fcf_pri_list);
 
@@ -11166,7 +11096,7 @@ lpfc_pci_probe_one_s4(struct pci_dev *pdev, const struct pci_device_id *pid)
 	if (error) {
 		lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
 				"1414 Failed to set up driver resource.\n");
-		goto out_free_iocb_list;
+		goto out_unset_driver_resource_s4;
 	}
 
 	/* Get the default values for Model Name and Description */
@@ -11266,8 +11196,6 @@ lpfc_pci_probe_one_s4(struct pci_dev *pdev, const struct pci_device_id *pid)
 	lpfc_destroy_shost(phba);
 out_unset_driver_resource:
 	lpfc_unset_driver_resource_phase2(phba);
-out_free_iocb_list:
-	lpfc_free_iocb_list(phba);
 out_unset_driver_resource_s4:
 	lpfc_sli4_driver_resource_unset(phba);
 out_unset_pci_mem_s4:

drivers/scsi/lpfc/lpfc_mem.c

@@ -629,8 +629,6 @@ struct rqb_dmabuf *
 lpfc_sli4_nvmet_alloc(struct lpfc_hba *phba)
 {
 	struct rqb_dmabuf *dma_buf;
-	struct lpfc_iocbq *nvmewqe;
-	union lpfc_wqe128 *wqe;
 
 	dma_buf = kzalloc(sizeof(struct rqb_dmabuf), GFP_KERNEL);
 	if (!dma_buf)
@@ -651,60 +649,6 @@ lpfc_sli4_nvmet_alloc(struct lpfc_hba *phba)
 		return NULL;
 	}
 	dma_buf->total_size = LPFC_NVMET_DATA_BUF_SIZE;
-
-	dma_buf->context = kzalloc(sizeof(struct lpfc_nvmet_rcv_ctx),
-				   GFP_KERNEL);
-	if (!dma_buf->context) {
-		pci_pool_free(phba->lpfc_nvmet_drb_pool, dma_buf->dbuf.virt,
-			      dma_buf->dbuf.phys);
-		pci_pool_free(phba->lpfc_hrb_pool, dma_buf->hbuf.virt,
-			      dma_buf->hbuf.phys);
-		kfree(dma_buf);
-		return NULL;
-	}
-
-	dma_buf->iocbq = lpfc_sli_get_iocbq(phba);
-	if (!dma_buf->iocbq) {
-		kfree(dma_buf->context);
-		pci_pool_free(phba->lpfc_nvmet_drb_pool, dma_buf->dbuf.virt,
-			      dma_buf->dbuf.phys);
-		pci_pool_free(phba->lpfc_hrb_pool, dma_buf->hbuf.virt,
-			      dma_buf->hbuf.phys);
-		kfree(dma_buf);
-		lpfc_printf_log(phba, KERN_ERR, LOG_NVME,
-				"2621 Ran out of nvmet iocb/WQEs\n");
-		return NULL;
-	}
-	dma_buf->iocbq->iocb_flag = LPFC_IO_NVMET;
-	nvmewqe = dma_buf->iocbq;
-	wqe = (union lpfc_wqe128 *)&nvmewqe->wqe;
-	/* Initialize WQE */
-	memset(wqe, 0, sizeof(union lpfc_wqe));
-	/* Word 7 */
-	bf_set(wqe_ct, &wqe->generic.wqe_com, SLI4_CT_RPI);
-	bf_set(wqe_class, &wqe->generic.wqe_com, CLASS3);
-	bf_set(wqe_pu, &wqe->generic.wqe_com, 1);
-	/* Word 10 */
-	bf_set(wqe_nvme, &wqe->fcp_tsend.wqe_com, 1);
-	bf_set(wqe_ebde_cnt, &wqe->generic.wqe_com, 0);
-	bf_set(wqe_qosd, &wqe->generic.wqe_com, 0);
-
-	dma_buf->iocbq->context1 = NULL;
-	spin_lock(&phba->sli4_hba.sgl_list_lock);
-	dma_buf->sglq = __lpfc_sli_get_nvmet_sglq(phba, dma_buf->iocbq);
-	spin_unlock(&phba->sli4_hba.sgl_list_lock);
-	if (!dma_buf->sglq) {
-		lpfc_sli_release_iocbq(phba, dma_buf->iocbq);
-		kfree(dma_buf->context);
-		pci_pool_free(phba->lpfc_nvmet_drb_pool, dma_buf->dbuf.virt,
-			      dma_buf->dbuf.phys);
-		pci_pool_free(phba->lpfc_hrb_pool, dma_buf->hbuf.virt,
-			      dma_buf->hbuf.phys);
-		kfree(dma_buf);
-		lpfc_printf_log(phba, KERN_ERR, LOG_NVME,
-				"6132 Ran out of nvmet XRIs\n");
-		return NULL;
-	}
 	return dma_buf;
 }
 
@@ -723,18 +667,6 @@ lpfc_sli4_nvmet_alloc(struct lpfc_hba *phba)
 void
 lpfc_sli4_nvmet_free(struct lpfc_hba *phba, struct rqb_dmabuf *dmab)
 {
-	unsigned long flags;
-
-	__lpfc_clear_active_sglq(phba, dmab->sglq->sli4_lxritag);
-	dmab->sglq->state = SGL_FREED;
-	dmab->sglq->ndlp = NULL;
-
-	spin_lock_irqsave(&phba->sli4_hba.sgl_list_lock, flags);
-	list_add_tail(&dmab->sglq->list, &phba->sli4_hba.lpfc_nvmet_sgl_list);
-	spin_unlock_irqrestore(&phba->sli4_hba.sgl_list_lock, flags);
-
-	lpfc_sli_release_iocbq(phba, dmab->iocbq);
-	kfree(dmab->context);
 	pci_pool_free(phba->lpfc_hrb_pool, dmab->hbuf.virt, dmab->hbuf.phys);
 	pci_pool_free(phba->lpfc_nvmet_drb_pool,
 		      dmab->dbuf.virt, dmab->dbuf.phys);
@@ -822,6 +754,11 @@ lpfc_rq_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp)
 	rc = lpfc_sli4_rq_put(rqb_entry->hrq, rqb_entry->drq, &hrqe, &drqe);
 	if (rc < 0) {
 		(rqbp->rqb_free_buffer)(phba, rqb_entry);
+		lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
+				"6409 Cannot post to RQ %d: %x %x\n",
+				rqb_entry->hrq->queue_id,
+				rqb_entry->hrq->host_index,
+				rqb_entry->hrq->hba_index);
 	} else {
 		list_add_tail(&rqb_entry->hbuf.list, &rqbp->rqb_buffer_list);
 		rqbp->buffer_count++;

drivers/scsi/lpfc/lpfc_nvmet.c

@@ -142,7 +142,7 @@ lpfc_nvmet_xmt_ls_rsp_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
 }
 
 /**
- * lpfc_nvmet_rq_post - Repost a NVMET RQ DMA buffer and clean up context
+ * lpfc_nvmet_ctxbuf_post - Repost a NVMET RQ DMA buffer and clean up context
  * @phba: HBA buffer is associated with
  * @ctxp: context to clean up
  * @mp: Buffer to free
@@ -155,24 +155,24 @@ lpfc_nvmet_xmt_ls_rsp_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
  * Returns: None
  **/
 void
-lpfc_nvmet_rq_post(struct lpfc_hba *phba, struct lpfc_nvmet_rcv_ctx *ctxp,
-		   struct lpfc_dmabuf *mp)
+lpfc_nvmet_ctxbuf_post(struct lpfc_hba *phba, struct lpfc_nvmet_ctxbuf *ctx_buf)
 {
-	if (ctxp) {
-		if (ctxp->flag)
-			lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
-				"6314 rq_post ctx xri x%x flag x%x\n",
-				ctxp->oxid, ctxp->flag);
-
-		if (ctxp->txrdy) {
-			pci_pool_free(phba->txrdy_payload_pool, ctxp->txrdy,
-				      ctxp->txrdy_phys);
-			ctxp->txrdy = NULL;
-			ctxp->txrdy_phys = 0;
-		}
-		ctxp->state = LPFC_NVMET_STE_FREE;
+	struct lpfc_nvmet_rcv_ctx *ctxp = ctx_buf->context;
+	unsigned long iflag;
+
+	if (ctxp->txrdy) {
+		pci_pool_free(phba->txrdy_payload_pool, ctxp->txrdy,
+			      ctxp->txrdy_phys);
+		ctxp->txrdy = NULL;
+		ctxp->txrdy_phys = 0;
 	}
-	lpfc_rq_buf_free(phba, mp);
+	ctxp->state = LPFC_NVMET_STE_FREE;
+
+	spin_lock_irqsave(&phba->sli4_hba.nvmet_io_lock, iflag);
+	list_add_tail(&ctx_buf->list,
+		      &phba->sli4_hba.lpfc_nvmet_ctx_list);
+	phba->sli4_hba.nvmet_ctx_cnt++;
+	spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_lock, iflag);
 }
 
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
@@ -718,7 +718,7 @@ lpfc_nvmet_xmt_fcp_release(struct nvmet_fc_target_port *tgtport,
 	if (aborting)
 		return;
 
-	lpfc_nvmet_rq_post(phba, ctxp, &ctxp->rqb_buffer->hbuf);
+	lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
 }
 
 static struct nvmet_fc_target_template lpfc_tgttemplate = {
@@ -739,17 +739,128 @@ static struct nvmet_fc_target_template lpfc_tgttemplate = {
 	.target_priv_sz = sizeof(struct lpfc_nvmet_tgtport),
 };
 
+void
+lpfc_nvmet_cleanup_io_context(struct lpfc_hba *phba)
+{
+	struct lpfc_nvmet_ctxbuf *ctx_buf, *next_ctx_buf;
+	unsigned long flags;
+
+	list_for_each_entry_safe(
+		ctx_buf, next_ctx_buf,
+		&phba->sli4_hba.lpfc_nvmet_ctx_list, list) {
+		spin_lock_irqsave(
+			&phba->sli4_hba.abts_nvme_buf_list_lock, flags);
+		list_del_init(&ctx_buf->list);
+		spin_unlock_irqrestore(
+			&phba->sli4_hba.abts_nvme_buf_list_lock, flags);
+		__lpfc_clear_active_sglq(phba,
+					 ctx_buf->sglq->sli4_lxritag);
+		ctx_buf->sglq->state = SGL_FREED;
+		ctx_buf->sglq->ndlp = NULL;
+
+		spin_lock_irqsave(&phba->sli4_hba.sgl_list_lock, flags);
+		list_add_tail(&ctx_buf->sglq->list,
+			      &phba->sli4_hba.lpfc_nvmet_sgl_list);
+		spin_unlock_irqrestore(&phba->sli4_hba.sgl_list_lock,
+				       flags);
+
+		lpfc_sli_release_iocbq(phba, ctx_buf->iocbq);
+		kfree(ctx_buf->context);
+	}
+}
+
+int
+lpfc_nvmet_setup_io_context(struct lpfc_hba *phba)
+{
+	struct lpfc_nvmet_ctxbuf *ctx_buf;
+	struct lpfc_iocbq *nvmewqe;
+	union lpfc_wqe128 *wqe;
+	int i;
+
+	lpfc_printf_log(phba, KERN_INFO, LOG_NVME,
+			"6403 Allocate NVMET resources for %d XRIs\n",
+			phba->sli4_hba.nvmet_xri_cnt);
+
+	/* For all nvmet xris, allocate resources needed to process a
+	 * received command on a per xri basis.
+	 */
+	for (i = 0; i < phba->sli4_hba.nvmet_xri_cnt; i++) {
+		ctx_buf = kzalloc(sizeof(*ctx_buf), GFP_KERNEL);
+		if (!ctx_buf) {
+			lpfc_printf_log(phba, KERN_ERR, LOG_NVME,
+					"6404 Ran out of memory for NVMET\n");
+			return -ENOMEM;
+		}
+
+		ctx_buf->context = kzalloc(sizeof(*ctx_buf->context),
+					   GFP_KERNEL);
+		if (!ctx_buf->context) {
+			kfree(ctx_buf);
+			lpfc_printf_log(phba, KERN_ERR, LOG_NVME,
+					"6405 Ran out of NVMET "
+					"context memory\n");
+			return -ENOMEM;
+		}
+		ctx_buf->context->ctxbuf = ctx_buf;
+
+		ctx_buf->iocbq = lpfc_sli_get_iocbq(phba);
+		if (!ctx_buf->iocbq) {
+			kfree(ctx_buf->context);
+			kfree(ctx_buf);
+			lpfc_printf_log(phba, KERN_ERR, LOG_NVME,
+					"6406 Ran out of NVMET iocb/WQEs\n");
+			return -ENOMEM;
+		}
+		ctx_buf->iocbq->iocb_flag = LPFC_IO_NVMET;
+		nvmewqe = ctx_buf->iocbq;
+		wqe = (union lpfc_wqe128 *)&nvmewqe->wqe;
+		/* Initialize WQE */
+		memset(wqe, 0, sizeof(union lpfc_wqe));
+		/* Word 7 */
+		bf_set(wqe_ct, &wqe->generic.wqe_com, SLI4_CT_RPI);
+		bf_set(wqe_class, &wqe->generic.wqe_com, CLASS3);
+		bf_set(wqe_pu, &wqe->generic.wqe_com, 1);
+		/* Word 10 */
+		bf_set(wqe_nvme, &wqe->fcp_tsend.wqe_com, 1);
+		bf_set(wqe_ebde_cnt, &wqe->generic.wqe_com, 0);
+		bf_set(wqe_qosd, &wqe->generic.wqe_com, 0);
+
+		ctx_buf->iocbq->context1 = NULL;
+		spin_lock(&phba->sli4_hba.sgl_list_lock);
+		ctx_buf->sglq = __lpfc_sli_get_nvmet_sglq(phba, ctx_buf->iocbq);
+		spin_unlock(&phba->sli4_hba.sgl_list_lock);
+		if (!ctx_buf->sglq) {
+			lpfc_sli_release_iocbq(phba, ctx_buf->iocbq);
+			kfree(ctx_buf->context);
+			kfree(ctx_buf);
+			lpfc_printf_log(phba, KERN_ERR, LOG_NVME,
+					"6407 Ran out of NVMET XRIs\n");
+			return -ENOMEM;
+		}
+		spin_lock(&phba->sli4_hba.nvmet_io_lock);
+		list_add_tail(&ctx_buf->list,
+			      &phba->sli4_hba.lpfc_nvmet_ctx_list);
+		spin_unlock(&phba->sli4_hba.nvmet_io_lock);
+	}
+	phba->sli4_hba.nvmet_ctx_cnt = phba->sli4_hba.nvmet_xri_cnt;
+	return 0;
+}
+
 int
 lpfc_nvmet_create_targetport(struct lpfc_hba *phba)
 {
 	struct lpfc_vport  *vport = phba->pport;
 	struct lpfc_nvmet_tgtport *tgtp;
 	struct nvmet_fc_port_info pinfo;
-	int error = 0;
+	int error;
 
 	if (phba->targetport)
 		return 0;
 
+	error = lpfc_nvmet_setup_io_context(phba);
+	if (error)
+		return error;
+
 	memset(&pinfo, 0, sizeof(struct nvmet_fc_port_info));
 	pinfo.node_name = wwn_to_u64(vport->fc_nodename.u.wwn);
 	pinfo.port_name = wwn_to_u64(vport->fc_portname.u.wwn);
@@ -778,13 +889,16 @@ lpfc_nvmet_create_targetport(struct lpfc_hba *phba)
 					     &phba->pcidev->dev,
 					     &phba->targetport);
 #else
-	error = -ENOMEM;
+	error = -ENOENT;
 #endif
 	if (error) {
 		lpfc_printf_log(phba, KERN_ERR, LOG_NVME_DISC,
 				"6025 Cannot register NVME targetport "
 				"x%x\n", error);
 		phba->targetport = NULL;
+
+		lpfc_nvmet_cleanup_io_context(phba);
+
 	} else {
 		tgtp = (struct lpfc_nvmet_tgtport *)
 			phba->targetport->private;
@@ -874,7 +988,7 @@ lpfc_sli4_nvmet_xri_aborted(struct lpfc_hba *phba,
 	list_for_each_entry_safe(ctxp, next_ctxp,
 				 &phba->sli4_hba.lpfc_abts_nvmet_ctx_list,
 				 list) {
-		if (ctxp->rqb_buffer->sglq->sli4_xritag != xri)
+		if (ctxp->ctxbuf->sglq->sli4_xritag != xri)
 			continue;
 
 		/* Check if we already received a free context call
@@ -895,7 +1009,7 @@ lpfc_sli4_nvmet_xri_aborted(struct lpfc_hba *phba,
 		    (ndlp->nlp_state == NLP_STE_UNMAPPED_NODE ||
 		     ndlp->nlp_state == NLP_STE_MAPPED_NODE)) {
 			lpfc_set_rrq_active(phba, ndlp,
-				ctxp->rqb_buffer->sglq->sli4_lxritag,
+				ctxp->ctxbuf->sglq->sli4_lxritag,
 				rxid, 1);
 			lpfc_sli4_abts_err_handler(phba, ndlp, axri);
 		}
@@ -904,8 +1018,8 @@ lpfc_sli4_nvmet_xri_aborted(struct lpfc_hba *phba,
 				"6318 XB aborted %x flg x%x (%x)\n",
 				ctxp->oxid, ctxp->flag, released);
 		if (released)
-			lpfc_nvmet_rq_post(phba, ctxp,
-					   &ctxp->rqb_buffer->hbuf);
+			lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
+
 		if (rrq_empty)
 			lpfc_worker_wake_up(phba);
 		return;
@@ -933,7 +1047,7 @@ lpfc_nvmet_rcv_unsol_abort(struct lpfc_vport *vport,
 	list_for_each_entry_safe(ctxp, next_ctxp,
 				 &phba->sli4_hba.lpfc_abts_nvmet_ctx_list,
 				 list) {
-		if (ctxp->rqb_buffer->sglq->sli4_xritag != xri)
+		if (ctxp->ctxbuf->sglq->sli4_xritag != xri)
 			continue;
 
 		spin_unlock(&phba->sli4_hba.abts_nvme_buf_list_lock);
@@ -985,6 +1099,7 @@ lpfc_nvmet_destroy_targetport(struct lpfc_hba *phba)
 		init_completion(&tgtp->tport_unreg_done);
 		nvmet_fc_unregister_targetport(phba->targetport);
 		wait_for_completion_timeout(&tgtp->tport_unreg_done, 5);
+		lpfc_nvmet_cleanup_io_context(phba);
 	}
 	phba->targetport = NULL;
 #endif
@@ -1115,15 +1230,18 @@ lpfc_nvmet_unsol_fcp_buffer(struct lpfc_hba *phba,
 	struct lpfc_nvmet_rcv_ctx *ctxp;
 	struct lpfc_nvmet_tgtport *tgtp;
 	struct fc_frame_header *fc_hdr;
+	struct lpfc_nvmet_ctxbuf *ctx_buf;
 	uint32_t *payload;
 	uint32_t size, oxid, sid, rc;
+	unsigned long iflag;
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 	uint32_t id;
 #endif
 
+	ctx_buf = NULL;
 	if (!nvmebuf || !phba->targetport) {
 		lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
-				"6157 FCP Drop IO\n");
+				"6157 NVMET FCP Drop IO\n");
 		oxid = 0;
 		size = 0;
 		sid = 0;
@@ -1131,6 +1249,23 @@ lpfc_nvmet_unsol_fcp_buffer(struct lpfc_hba *phba,
 		goto dropit;
 	}
 
+	spin_lock_irqsave(&phba->sli4_hba.nvmet_io_lock, iflag);
+	if (phba->sli4_hba.nvmet_ctx_cnt) {
+		list_remove_head(&phba->sli4_hba.lpfc_nvmet_ctx_list,
+				 ctx_buf, struct lpfc_nvmet_ctxbuf, list);
+		phba->sli4_hba.nvmet_ctx_cnt--;
+	}
+	spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_lock, iflag);
+
+	if (!ctx_buf) {
+		lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
+				"6408 No NVMET ctx Drop IO\n");
+		oxid = 0;
+		size = 0;
+		sid = 0;
+		ctxp = NULL;
+		goto dropit;
+	}
 
 	tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
 	payload = (uint32_t *)(nvmebuf->dbuf.virt);
@@ -1139,16 +1274,7 @@ lpfc_nvmet_unsol_fcp_buffer(struct lpfc_hba *phba,
 	oxid = be16_to_cpu(fc_hdr->fh_ox_id);
 	sid = sli4_sid_from_fc_hdr(fc_hdr);
 
-	ctxp = (struct lpfc_nvmet_rcv_ctx *)nvmebuf->context;
-	if (ctxp == NULL) {
-		atomic_inc(&tgtp->rcv_fcp_cmd_drop);
-		lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
-				"6158 FCP Drop IO x%x: Alloc\n",
-				oxid);
-		lpfc_nvmet_rq_post(phba, NULL, &nvmebuf->hbuf);
-		/* Cannot send ABTS without context */
-		return;
-	}
+	ctxp = (struct lpfc_nvmet_rcv_ctx *)ctx_buf->context;
 	memset(ctxp, 0, sizeof(ctxp->ctx));
 	ctxp->wqeq = NULL;
 	ctxp->txrdy = NULL;
@@ -1158,9 +1284,9 @@ lpfc_nvmet_unsol_fcp_buffer(struct lpfc_hba *phba,
 	ctxp->oxid = oxid;
 	ctxp->sid = sid;
 	ctxp->state = LPFC_NVMET_STE_RCV;
-	ctxp->rqb_buffer = nvmebuf;
 	ctxp->entry_cnt = 1;
 	ctxp->flag = 0;
+	ctxp->ctxbuf = ctx_buf;
 	spin_lock_init(&ctxp->ctxlock);
 
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
@@ -1192,6 +1318,9 @@ lpfc_nvmet_unsol_fcp_buffer(struct lpfc_hba *phba,
 	 * The calling sequence should be:
 	 * nvmet_fc_rcv_fcp_req -> lpfc_nvmet_xmt_fcp_op/cmp -> req->done
 	 * lpfc_nvmet_xmt_fcp_op_cmp should free the allocated ctxp.
+	 * When we return from nvmet_fc_rcv_fcp_req, all relevant info in
+	 * the NVME command / FC header is stored, so we are free to repost
+	 * the buffer.
 	 */
 	rc = nvmet_fc_rcv_fcp_req(phba->targetport, &ctxp->ctx.fcp_req,
 				  payload, size);
@@ -1199,6 +1328,7 @@ lpfc_nvmet_unsol_fcp_buffer(struct lpfc_hba *phba,
 	/* Process FCP command */
 	if (rc == 0) {
 		atomic_inc(&tgtp->rcv_fcp_cmd_out);
+		lpfc_rq_buf_free(phba, &nvmebuf->hbuf); /* repost */
 		return;
 	}
 
@@ -1213,15 +1343,17 @@ lpfc_nvmet_unsol_fcp_buffer(struct lpfc_hba *phba,
 	lpfc_nvmeio_data(phba, "NVMET FCP DROP: xri x%x sz %d from %06x\n",
 			 oxid, size, sid);
 	if (oxid) {
+		lpfc_nvmet_defer_release(phba, ctxp);
 		lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, sid, oxid);
+		lpfc_rq_buf_free(phba, &nvmebuf->hbuf); /* repost */
 		return;
 	}
 
-	if (nvmebuf) {
-		nvmebuf->iocbq->hba_wqidx = 0;
-		/* We assume a rcv'ed cmd ALWAYs fits into 1 buffer */
-		lpfc_nvmet_rq_post(phba, ctxp, &nvmebuf->hbuf);
-	}
+	if (ctx_buf)
+		lpfc_nvmet_ctxbuf_post(phba, ctx_buf);
+
+	if (nvmebuf)
+		lpfc_rq_buf_free(phba, &nvmebuf->hbuf); /* repost */
 #endif
 }
 
@@ -1273,7 +1405,7 @@ lpfc_nvmet_unsol_fcp_event(struct lpfc_hba *phba,
 			   uint64_t isr_timestamp)
 {
 	if (phba->nvmet_support == 0) {
-		lpfc_nvmet_rq_post(phba, NULL, &nvmebuf->hbuf);
+		lpfc_rq_buf_free(phba, &nvmebuf->hbuf);
 		return;
 	}
 	lpfc_nvmet_unsol_fcp_buffer(phba, pring, nvmebuf,
@@ -1474,7 +1606,7 @@ lpfc_nvmet_prep_fcp_wqe(struct lpfc_hba *phba,
 	nvmewqe = ctxp->wqeq;
 	if (nvmewqe == NULL) {
 		/* Allocate buffer for  command wqe */
-		nvmewqe = ctxp->rqb_buffer->iocbq;
+		nvmewqe = ctxp->ctxbuf->iocbq;
 		if (nvmewqe == NULL) {
 			lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
 					"6110 lpfc_nvmet_prep_fcp_wqe: No "
@@ -1501,7 +1633,7 @@ lpfc_nvmet_prep_fcp_wqe(struct lpfc_hba *phba,
 		return NULL;
 	}
 
-	sgl  = (struct sli4_sge *)ctxp->rqb_buffer->sglq->sgl;
+	sgl  = (struct sli4_sge *)ctxp->ctxbuf->sglq->sgl;
 	switch (rsp->op) {
 	case NVMET_FCOP_READDATA:
 	case NVMET_FCOP_READDATA_RSP:
@@ -1851,15 +1983,16 @@ lpfc_nvmet_sol_fcp_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
 			wcqe->word0, wcqe->total_data_placed,
 			result, wcqe->word3);
 
+	cmdwqe->context2 = NULL;
+	cmdwqe->context3 = NULL;
 	/*
 	 * if transport has released ctx, then can reuse it. Otherwise,
 	 * will be recycled by transport release call.
 	 */
 	if (released)
-		lpfc_nvmet_rq_post(phba, ctxp, &ctxp->rqb_buffer->hbuf);
+		lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
 
-	cmdwqe->context2 = NULL;
-	cmdwqe->context3 = NULL;
+	/* This is the iocbq for the abort, not the command */
 	lpfc_sli_release_iocbq(phba, cmdwqe);
 
 	/* Since iaab/iaar are NOT set, there is no work left.
@@ -1932,15 +2065,15 @@ lpfc_nvmet_unsol_fcp_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
 			ctxp->oxid, ctxp->flag, released,
 			wcqe->word0, wcqe->total_data_placed,
 			result, wcqe->word3);
+
+	cmdwqe->context2 = NULL;
+	cmdwqe->context3 = NULL;
 	/*
 	 * if transport has released ctx, then can reuse it. Otherwise,
 	 * will be recycled by transport release call.
 	 */
 	if (released)
-		lpfc_nvmet_rq_post(phba, ctxp, &ctxp->rqb_buffer->hbuf);
-
-	cmdwqe->context2 = NULL;
-	cmdwqe->context3 = NULL;
+		lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
 
 	/* Since iaab/iaar are NOT set, there is no work left.
 	 * For LPFC_NVMET_XBUSY, lpfc_sli4_nvmet_xri_aborted
@@ -2002,10 +2135,6 @@ lpfc_nvmet_unsol_issue_abort(struct lpfc_hba *phba,
 			sid, xri, ctxp->wqeq->sli4_xritag);
 
 	tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
-	if (!ctxp->wqeq) {
-		ctxp->wqeq = ctxp->rqb_buffer->iocbq;
-		ctxp->wqeq->hba_wqidx = 0;
-	}
 
 	ndlp = lpfc_findnode_did(phba->pport, sid);
 	if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
@@ -2101,7 +2230,7 @@ lpfc_nvmet_sol_fcp_issue_abort(struct lpfc_hba *phba,
 
 	tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
 	if (!ctxp->wqeq) {
-		ctxp->wqeq = ctxp->rqb_buffer->iocbq;
+		ctxp->wqeq = ctxp->ctxbuf->iocbq;
 		ctxp->wqeq->hba_wqidx = 0;
 	}
 
@@ -2239,7 +2368,7 @@ lpfc_nvmet_unsol_fcp_issue_abort(struct lpfc_hba *phba,
 
 	tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
 	if (!ctxp->wqeq) {
-		ctxp->wqeq = ctxp->rqb_buffer->iocbq;
+		ctxp->wqeq = ctxp->ctxbuf->iocbq;
 		ctxp->wqeq->hba_wqidx = 0;
 	}
 
@@ -2294,6 +2423,7 @@ lpfc_nvmet_unsol_ls_issue_abort(struct lpfc_hba *phba,
 	}
 	abts_wqeq = ctxp->wqeq;
 	wqe_abts = &abts_wqeq->wqe;
+
 	lpfc_nvmet_unsol_issue_abort(phba, ctxp, sid, xri);
 
 	spin_lock_irqsave(&phba->hbalock, flags);

drivers/scsi/lpfc/lpfc_nvmet.h

@@ -106,6 +106,7 @@ struct lpfc_nvmet_rcv_ctx {
 #define LPFC_NVMET_CTX_RLS		0x8  /* ctx free requested */
 #define LPFC_NVMET_ABTS_RCV		0x10  /* ABTS received on exchange */
 	struct rqb_dmabuf *rqb_buffer;
+	struct lpfc_nvmet_ctxbuf *ctxbuf;
 
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 	uint64_t ts_isr_cmd;

drivers/scsi/lpfc/lpfc_sli.c

@@ -6513,6 +6513,49 @@ lpfc_set_host_data(struct lpfc_hba *phba, LPFC_MBOXQ_t *mbox)
 		 (phba->hba_flag & HBA_FCOE_MODE) ? "FCoE" : "FC");
 }
 
+static int
+lpfc_post_rq_buffer(struct lpfc_hba *phba, struct lpfc_queue *hrq,
+		    struct lpfc_queue *drq, int count)
+{
+	int rc, i;
+	struct lpfc_rqe hrqe;
+	struct lpfc_rqe drqe;
+	struct lpfc_rqb *rqbp;
+	struct rqb_dmabuf *rqb_buffer;
+	LIST_HEAD(rqb_buf_list);
+
+	rqbp = hrq->rqbp;
+	for (i = 0; i < count; i++) {
+		/* IF RQ is already full, don't bother */
+		if (rqbp->buffer_count + i >= rqbp->entry_count - 1)
+			break;
+		rqb_buffer = rqbp->rqb_alloc_buffer(phba);
+		if (!rqb_buffer)
+			break;
+		rqb_buffer->hrq = hrq;
+		rqb_buffer->drq = drq;
+		list_add_tail(&rqb_buffer->hbuf.list, &rqb_buf_list);
+	}
+	while (!list_empty(&rqb_buf_list)) {
+		list_remove_head(&rqb_buf_list, rqb_buffer, struct rqb_dmabuf,
+				 hbuf.list);
+
+		hrqe.address_lo = putPaddrLow(rqb_buffer->hbuf.phys);
+		hrqe.address_hi = putPaddrHigh(rqb_buffer->hbuf.phys);
+		drqe.address_lo = putPaddrLow(rqb_buffer->dbuf.phys);
+		drqe.address_hi = putPaddrHigh(rqb_buffer->dbuf.phys);
+		rc = lpfc_sli4_rq_put(hrq, drq, &hrqe, &drqe);
+		if (rc < 0) {
+			rqbp->rqb_free_buffer(phba, rqb_buffer);
+		} else {
+			list_add_tail(&rqb_buffer->hbuf.list,
+				      &rqbp->rqb_buffer_list);
+			rqbp->buffer_count++;
+		}
+	}
+	return 1;
+}
+
 /**
  * lpfc_sli4_hba_setup - SLI4 device initialization PCI function
  * @phba: Pointer to HBA context object.
@@ -6525,7 +6568,7 @@ lpfc_set_host_data(struct lpfc_hba *phba, LPFC_MBOXQ_t *mbox)
 int
 lpfc_sli4_hba_setup(struct lpfc_hba *phba)
 {
-	int rc, i;
+	int rc, i, cnt;
 	LPFC_MBOXQ_t *mboxq;
 	struct lpfc_mqe *mqe;
 	uint8_t *vpd;
@@ -6876,6 +6919,21 @@ lpfc_sli4_hba_setup(struct lpfc_hba *phba)
 			goto out_destroy_queue;
 		}
 		phba->sli4_hba.nvmet_xri_cnt = rc;
+
+		cnt = phba->cfg_iocb_cnt * 1024;
+		/* We need 1 iocbq for every SGL, for IO processing */
+		cnt += phba->sli4_hba.nvmet_xri_cnt;
+		/* Initialize and populate the iocb list per host */
+		lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
+				"2821 initialize iocb list %d total %d\n",
+				phba->cfg_iocb_cnt, cnt);
+		rc = lpfc_init_iocb_list(phba, cnt);
+		if (rc) {
+			lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
+					"1413 Failed to init iocb list.\n");
+			goto out_destroy_queue;
+		}
+
 		lpfc_nvmet_create_targetport(phba);
 	} else {
 		/* update host scsi xri-sgl sizes and mappings */
@@ -6895,10 +6953,21 @@ lpfc_sli4_hba_setup(struct lpfc_hba *phba)
 					"and mapping: %d\n", rc);
 			goto out_destroy_queue;
 		}
+
+		cnt = phba->cfg_iocb_cnt * 1024;
+		/* Initialize and populate the iocb list per host */
+		lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
+				"2820 initialize iocb list %d total %d\n",
+				phba->cfg_iocb_cnt, cnt);
+		rc = lpfc_init_iocb_list(phba, cnt);
+		if (rc) {
+			lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
+					"6301 Failed to init iocb list.\n");
+			goto out_destroy_queue;
+		}
 	}
 
 	if (phba->nvmet_support && phba->cfg_nvmet_mrq) {
-
 		/* Post initial buffers to all RQs created */
 		for (i = 0; i < phba->cfg_nvmet_mrq; i++) {
 			rqbp = phba->sli4_hba.nvmet_mrq_hdr[i]->rqbp;
@@ -6911,7 +6980,7 @@ lpfc_sli4_hba_setup(struct lpfc_hba *phba)
 			lpfc_post_rq_buffer(
 				phba, phba->sli4_hba.nvmet_mrq_hdr[i],
 				phba->sli4_hba.nvmet_mrq_data[i],
-				phba->cfg_nvmet_mrq_post);
+				LPFC_NVMET_RQE_DEF_COUNT);
 		}
 	}
 
@@ -7078,6 +7147,7 @@ lpfc_sli4_hba_setup(struct lpfc_hba *phba)
 	/* Unset all the queues set up in this routine when error out */
 	lpfc_sli4_queue_unset(phba);
 out_destroy_queue:
+	lpfc_free_iocb_list(phba);
 	lpfc_sli4_queue_destroy(phba);
 out_stop_timers:
 	lpfc_stop_hba_timers(phba);
@@ -18731,7 +18801,7 @@ lpfc_sli4_issue_wqe(struct lpfc_hba *phba, uint32_t ring_number,
 
 		spin_lock_irqsave(&pring->ring_lock, iflags);
 		ctxp = pwqe->context2;
-		sglq = ctxp->rqb_buffer->sglq;
+		sglq = ctxp->ctxbuf->sglq;
 		if (pwqe->sli4_xritag ==  NO_XRI) {
 			pwqe->sli4_lxritag = sglq->sli4_lxritag;
 			pwqe->sli4_xritag = sglq->sli4_xritag;

drivers/scsi/lpfc/lpfc_sli4.h

@@ -618,10 +618,12 @@ struct lpfc_sli4_hba {
 	uint16_t scsi_xri_start;
 	uint16_t els_xri_cnt;
 	uint16_t nvmet_xri_cnt;
+	uint16_t nvmet_ctx_cnt;
 	struct list_head lpfc_els_sgl_list;
 	struct list_head lpfc_abts_els_sgl_list;
 	struct list_head lpfc_nvmet_sgl_list;
 	struct list_head lpfc_abts_nvmet_ctx_list;
+	struct list_head lpfc_nvmet_ctx_list;
 	struct list_head lpfc_abts_scsi_buf_list;
 	struct list_head lpfc_abts_nvme_buf_list;
 	struct lpfc_sglq **lpfc_sglq_active_list;
@@ -662,8 +664,6 @@ struct lpfc_sli4_hba {
 	uint16_t num_online_cpu;
 	uint16_t num_present_cpu;
 	uint16_t curr_disp_cpu;
-
-	uint16_t nvmet_mrq_post_idx;
 };
 
 enum lpfc_sge_type {