scsi: lpfc: Raise nvme defaults to support a larger io and more connectivity

When nvme is enabled, change the default for two parameters:
 sg_seg_cnt - raise the per-io sg list size so that 1MB ios are
     supported (based on a 4k buffer per element).
 iocb_cnt - raise the number of buffers used for things like
     NVME LS request/responses to allow more concurrent requests
     to for larger nvme configs.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c
index fcf8b77..18750bf 100644 (file)
--- a/drivers/scsi/lpfc/lpfc_attr.c
+++ b/drivers/scsi/lpfc/lpfc_attr.c
@@ -6641,6 +6641,16 @@ lpfc_get_cfgparam(struct lpfc_hba *phba)
        lpfc_sli_mode_init(phba, lpfc_sli_mode);
        phba->cfg_enable_dss = 1;
        lpfc_enable_mds_diags_init(phba, lpfc_enable_mds_diags);
+
+       /* If the NVME FC4 type is enabled, scale the sg_seg_cnt to
+        * accommodate 512K and 1M IOs in a single nvme buf and supply
+        * enough NVME LS iocb buffers for larger connectivity counts.
+        */
+       if (phba->cfg_enable_fc4_type & LPFC_ENABLE_NVME) {
+               phba->cfg_sg_seg_cnt = LPFC_MAX_NVME_SEG_CNT;
+               phba->cfg_iocb_cnt = 5;
+       }
+
        return;
 }