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scsi: lpfc: Enlarge nvmet asynchronous receive buffer counts 

Under large io load, the current sizing of asynchronous buffer counts
could be exceeded, indicated by a 2885 log message:

  2885 Port Status Event: port status reg 0x81800000, port smphr
      reg 0xc000, error 1=0x52004a01, error 2=0x0

Enlarge the async receive queue size.  Allow for a configurable number
of buffers to be posted to each RQ, using the new attribute
lpfc_nvmet_mrq_post.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
James Smart 2018-04-09 14:24:24 -07:00 committed by Martin K. Petersen
parent 66a210ffb8
commit 2448e48425
4 changed files with 17 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/scsi/lpfc/lpfc.h
View File

@ -782,6 +782,7 @@ struct lpfc_hba {
uint32_t cfg_nvme_oas;
uint32_t cfg_nvme_embed_cmd;
uint32_t cfg_nvme_io_channel;
uint32_t cfg_nvmet_mrq_post;
uint32_t cfg_nvmet_mrq;
uint32_t cfg_enable_nvmet;
uint32_t cfg_nvme_enable_fb;

11
drivers/scsi/lpfc/lpfc_attr.c
View File

@ -3423,6 +3423,15 @@ LPFC_ATTR_R(nvmet_mrq,
LPFC_NVMET_MRQ_AUTO, LPFC_NVMET_MRQ_AUTO, LPFC_NVMET_MRQ_MAX,
"Specify number of RQ pairs for processing NVMET cmds");
/*
* lpfc_nvmet_mrq_post: Specify number of RQ buffer to initially post
* to each NVMET RQ. Range 64 to 2048, default is 512.
*/
LPFC_ATTR_R(nvmet_mrq_post,
LPFC_NVMET_RQE_DEF_POST, LPFC_NVMET_RQE_MIN_POST,
LPFC_NVMET_RQE_DEF_COUNT,
"Specify number of RQ buffers to initially post");
/*
* lpfc_enable_fc4_type: Defines what FC4 types are supported.
* Supported Values: 1 - register just FCP
@ -5353,6 +5362,7 @@ 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,
@ -6403,6 +6413,7 @@ 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);

6
drivers/scsi/lpfc/lpfc_nvmet.h
View File

@ -22,8 +22,10 @@
********************************************************************/
#define LPFC_NVMET_DEFAULT_SEGS (64 + 1) /* 256K IOs */
#define LPFC_NVMET_RQE_DEF_COUNT 512
#define LPFC_NVMET_SUCCESS_LEN 12
#define LPFC_NVMET_RQE_MIN_POST 128
#define LPFC_NVMET_RQE_DEF_POST 512
#define LPFC_NVMET_RQE_DEF_COUNT 2048
#define LPFC_NVMET_SUCCESS_LEN 12
#define LPFC_NVMET_MRQ_OFF 0xffff
#define LPFC_NVMET_MRQ_AUTO 0

2
drivers/scsi/lpfc/lpfc_sli.c
View File

@ -7199,7 +7199,7 @@ 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],
LPFC_NVMET_RQE_DEF_COUNT, i);
phba->cfg_nvmet_mrq_post, i);
}
}