scsi: lpfc: Cap NPIV vports to 256

[ Upstream commit 8b47ae69e049ae0b3373859d901f0334322f9fe9 ]

Depending on the chipset, the number of NPIV vports may vary and be in
excess of what most switches support (256). To avoid confusion with the
users, limit the reported NPIV vports to 256.

Additionally correct the 16G adapter which is reporting a bogus NPIV vport
number if the link is down.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/scsi/lpfc/lpfc.h b/drivers/scsi/lpfc/lpfc.h
index 03e95a3216c8ca43677139fc9159c6174ec74184..5fc41aa53ceb3a89613da9644250ea9fea61c72f 100644 (file)
--- a/drivers/scsi/lpfc/lpfc.h
+++ b/drivers/scsi/lpfc/lpfc.h
@@ -969,7 +969,8 @@ struct lpfc_hba {
        struct list_head port_list;
        struct lpfc_vport *pport;       /* physical lpfc_vport pointer */
        uint16_t max_vpi;               /* Maximum virtual nports */
-#define LPFC_MAX_VPI 0xFFFF            /* Max number of VPI supported */
+#define LPFC_MAX_VPI   0xFF            /* Max number VPI supported 0 - 0xff */
+#define LPFC_MAX_VPORTS        0x100           /* Max vports per port, with pport */
        uint16_t max_vports;            /*
                                         * For IOV HBAs max_vpi can change
                                         * after a reset. max_vports is max

diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c
index 82ce5d193018906b1e3413a355bbcfa1dc2659fe..f447355cc9c044a4618493e43946fa72b9a70633 100644 (file)
--- a/drivers/scsi/lpfc/lpfc_attr.c
+++ b/drivers/scsi/lpfc/lpfc_attr.c
@@ -1478,6 +1478,9 @@ lpfc_get_hba_info(struct lpfc_hba *phba,
                max_vpi = (bf_get(lpfc_mbx_rd_conf_vpi_count, rd_config) > 0) ?
                        (bf_get(lpfc_mbx_rd_conf_vpi_count, rd_config) - 1) : 0;
 
+               /* Limit the max we support */
+               if (max_vpi > LPFC_MAX_VPI)
+                       max_vpi = LPFC_MAX_VPI;
                if (mvpi)
                        *mvpi = max_vpi;
                if (avpi)
@@ -1493,8 +1496,13 @@ lpfc_get_hba_info(struct lpfc_hba *phba,
                        *axri = pmb->un.varRdConfig.avail_xri;
                if (mvpi)
                        *mvpi = pmb->un.varRdConfig.max_vpi;
-               if (avpi)
-                       *avpi = pmb->un.varRdConfig.avail_vpi;
+               if (avpi) {
+                       /* avail_vpi is only valid if link is up and ready */
+                       if (phba->link_state == LPFC_HBA_READY)
+                               *avpi = pmb->un.varRdConfig.avail_vpi;
+                       else
+                               *avpi = pmb->un.varRdConfig.max_vpi;
+               }
        }
 
        mempool_free(pmboxq, phba->mbox_mem_pool);

diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index c69c2a2b2eadf65aacba36f1e2c7c532720d8a4d..9fc5507ee39e7e394911f289573ff54892172fae 100644 (file)
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -7643,6 +7643,9 @@ lpfc_sli4_read_config(struct lpfc_hba *phba)
                        bf_get(lpfc_mbx_rd_conf_xri_base, rd_config);
                phba->sli4_hba.max_cfg_param.max_vpi =
                        bf_get(lpfc_mbx_rd_conf_vpi_count, rd_config);
+               /* Limit the max we support */
+               if (phba->sli4_hba.max_cfg_param.max_vpi > LPFC_MAX_VPORTS)
+                       phba->sli4_hba.max_cfg_param.max_vpi = LPFC_MAX_VPORTS;
                phba->sli4_hba.max_cfg_param.vpi_base =
                        bf_get(lpfc_mbx_rd_conf_vpi_base, rd_config);
                phba->sli4_hba.max_cfg_param.max_rpi =