scsi: lpfc: Separate NVMET data buffer pool fir ELS/CT.

Using 2048 byte buffer and onle 128 bytes is needed.

Create nee LFPC_NVMET_DATA_BUF_SIZE define to use for NVMET RQ/MRQs.
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

@@ -943,6 +943,7 @@ struct lpfc_hba {
 	struct pci_pool *lpfc_mbuf_pool;
 	struct pci_pool *lpfc_hrb_pool;	/* header receive buffer pool */
 	struct pci_pool *lpfc_drb_pool; /* data receive buffer pool */
+	struct pci_pool *lpfc_nvmet_drb_pool; /* data receive buffer pool */
 	struct pci_pool *lpfc_hbq_pool;	/* SLI3 hbq buffer pool */
 	struct pci_pool *txrdy_payload_pool;
 	struct lpfc_dma_pool lpfc_mbuf_safety_pool;

drivers/scsi/lpfc/lpfc_crtn.h

@@ -271,6 +271,7 @@ int lpfc_sli4_fcf_rr_next_proc(struct lpfc_vport *, uint16_t);
 void lpfc_sli4_clear_fcf_rr_bmask(struct lpfc_hba *);
 
 int lpfc_mem_alloc(struct lpfc_hba *, int align);
+int lpfc_nvmet_mem_alloc(struct lpfc_hba *phba);
 int lpfc_mem_alloc_active_rrq_pool_s4(struct lpfc_hba *);
 void lpfc_mem_free(struct lpfc_hba *);
 void lpfc_mem_free_all(struct lpfc_hba *);

drivers/scsi/lpfc/lpfc_hw4.h

@@ -1356,6 +1356,7 @@ struct lpfc_mbx_wq_destroy {
 
 #define LPFC_HDR_BUF_SIZE 128
 #define LPFC_DATA_BUF_SIZE 2048
+#define LPFC_NVMET_DATA_BUF_SIZE 128
 struct rq_context {
 	uint32_t word0;
 #define lpfc_rq_context_rqe_count_SHIFT	16	/* Version 0 Only */

drivers/scsi/lpfc/lpfc_init.c

@@ -5956,16 +5956,21 @@ lpfc_sli4_driver_resource_setup(struct lpfc_hba *phba)
 		for (i = 0; i < lpfc_enable_nvmet_cnt; i++) {
 			if (wwn == lpfc_enable_nvmet[i]) {
 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
+				if (lpfc_nvmet_mem_alloc(phba))
+					break;
+
+				phba->nvmet_support = 1; /* a match */
+
 				lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
 						"6017 NVME Target %016llx\n",
 						wwn);
-				phba->nvmet_support = 1; /* a match */
 #else
 				lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
 						"6021 Can't enable NVME Target."
 						" NVME_TARGET_FC infrastructure"
 						" is not in kernel\n");
 #endif
+				break;
 			}
 		}
 	}

drivers/scsi/lpfc/lpfc_mem.c

@@ -214,6 +214,21 @@ lpfc_mem_alloc(struct lpfc_hba *phba, int align)
 	return -ENOMEM;
 }
 
+int
+lpfc_nvmet_mem_alloc(struct lpfc_hba *phba)
+{
+	phba->lpfc_nvmet_drb_pool =
+		pci_pool_create("lpfc_nvmet_drb_pool",
+				phba->pcidev, LPFC_NVMET_DATA_BUF_SIZE,
+				SGL_ALIGN_SZ, 0);
+	if (!phba->lpfc_nvmet_drb_pool) {
+		lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
+				"6024 Can't enable NVME Target - no memory\n");
+		return -ENOMEM;
+	}
+	return 0;
+}
+
 /**
  * lpfc_mem_free - Frees memory allocated by lpfc_mem_alloc
  * @phba: HBA to free memory for
@@ -232,6 +247,9 @@ lpfc_mem_free(struct lpfc_hba *phba)
 
 	/* Free HBQ pools */
 	lpfc_sli_hbqbuf_free_all(phba);
+	if (phba->lpfc_nvmet_drb_pool)
+		pci_pool_destroy(phba->lpfc_nvmet_drb_pool);
+	phba->lpfc_nvmet_drb_pool = NULL;
 	if (phba->lpfc_drb_pool)
 		pci_pool_destroy(phba->lpfc_drb_pool);
 	phba->lpfc_drb_pool = NULL;
@@ -624,20 +642,20 @@ lpfc_sli4_nvmet_alloc(struct lpfc_hba *phba)
 		kfree(dma_buf);
 		return NULL;
 	}
-	dma_buf->dbuf.virt = pci_pool_alloc(phba->lpfc_drb_pool, GFP_KERNEL,
-					    &dma_buf->dbuf.phys);
+	dma_buf->dbuf.virt = pci_pool_alloc(phba->lpfc_nvmet_drb_pool,
+					    GFP_KERNEL, &dma_buf->dbuf.phys);
 	if (!dma_buf->dbuf.virt) {
 		pci_pool_free(phba->lpfc_hrb_pool, dma_buf->hbuf.virt,
 			      dma_buf->hbuf.phys);
 		kfree(dma_buf);
 		return NULL;
 	}
-	dma_buf->total_size = LPFC_DATA_BUF_SIZE;
+	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_drb_pool, dma_buf->dbuf.virt,
+		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);
@@ -648,7 +666,7 @@ lpfc_sli4_nvmet_alloc(struct lpfc_hba *phba)
 	dma_buf->iocbq = lpfc_sli_get_iocbq(phba);
 	if (!dma_buf->iocbq) {
 		kfree(dma_buf->context);
-		pci_pool_free(phba->lpfc_drb_pool, dma_buf->dbuf.virt,
+		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);
@@ -678,7 +696,7 @@ lpfc_sli4_nvmet_alloc(struct lpfc_hba *phba)
 	if (!dma_buf->sglq) {
 		lpfc_sli_release_iocbq(phba, dma_buf->iocbq);
 		kfree(dma_buf->context);
-		pci_pool_free(phba->lpfc_drb_pool, dma_buf->dbuf.virt,
+		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);
@@ -718,7 +736,8 @@ lpfc_sli4_nvmet_free(struct lpfc_hba *phba, struct rqb_dmabuf *dmab)
 	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_drb_pool, dmab->dbuf.virt, dmab->dbuf.phys);
+	pci_pool_free(phba->lpfc_nvmet_drb_pool,
+		      dmab->dbuf.virt, dmab->dbuf.phys);
 	kfree(dmab);
 }
 

drivers/scsi/lpfc/lpfc_sli.c

@@ -15079,7 +15079,12 @@ lpfc_rq_create(struct lpfc_hba *phba, struct lpfc_queue *hrq,
 	if (phba->sli4_hba.pc_sli4_params.rqv == LPFC_Q_CREATE_VERSION_1) {
 		bf_set(lpfc_rq_context_rqe_count_1,
 		       &rq_create->u.request.context, hrq->entry_count);
-		rq_create->u.request.context.buffer_size = LPFC_DATA_BUF_SIZE;
+		if (subtype == LPFC_NVMET)
+			rq_create->u.request.context.buffer_size =
+				LPFC_NVMET_DATA_BUF_SIZE;
+		else
+			rq_create->u.request.context.buffer_size =
+				LPFC_DATA_BUF_SIZE;
 		bf_set(lpfc_rq_context_rqe_size, &rq_create->u.request.context,
 		       LPFC_RQE_SIZE_8);
 		bf_set(lpfc_rq_context_page_size, &rq_create->u.request.context,
@@ -15116,8 +15121,14 @@ lpfc_rq_create(struct lpfc_hba *phba, struct lpfc_queue *hrq,
 			       LPFC_RQ_RING_SIZE_4096);
 			break;
 		}
-		bf_set(lpfc_rq_context_buf_size, &rq_create->u.request.context,
-		       LPFC_DATA_BUF_SIZE);
+		if (subtype == LPFC_NVMET)
+			bf_set(lpfc_rq_context_buf_size,
+			       &rq_create->u.request.context,
+			       LPFC_NVMET_DATA_BUF_SIZE);
+		else
+			bf_set(lpfc_rq_context_buf_size,
+			       &rq_create->u.request.context,
+			       LPFC_DATA_BUF_SIZE);
 	}
 	bf_set(lpfc_rq_context_cq_id, &rq_create->u.request.context,
 	       cq->queue_id);
@@ -15263,7 +15274,7 @@ lpfc_mrq_create(struct lpfc_hba *phba, struct lpfc_queue **hrqp,
 			       cq->queue_id);
 			bf_set(lpfc_rq_context_data_size,
 			       &rq_create->u.request.context,
-			       LPFC_DATA_BUF_SIZE);
+			       LPFC_NVMET_DATA_BUF_SIZE);
 			bf_set(lpfc_rq_context_hdr_size,
 			       &rq_create->u.request.context,
 			       LPFC_HDR_BUF_SIZE);