From: James Smart Date: Mon, 10 Sep 2018 17:30:43 +0000 (-0700) Subject: scsi: lpfc: Raise nvme defaults to support a larger io and more connectivity X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=faf0a5f829eb2860a9b1301ea86e124299c062cf;p=linux.git 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 Signed-off-by: James Smart Signed-off-by: Martin K. Petersen --- diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c index fcf8b77e0d1f6..18750bf2883ce 100644 --- 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; }