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| author | James Smart <jsmart2021@gmail.com> | 2018-01-31 02:58:49 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2018-02-12 19:43:23 +0300 |
| commit | 6e8e1c14c61e54253098521127cd5ac0b959dd32 (patch) | |
| tree | 22e7873a5706acf590ec091fe326d95739baadc6 /drivers/scsi/lpfc/lpfc_sli4.h | |
| parent | 8ae337013674d5c1e803429356b85cba2ce12067 (diff) | |
| download | linux-6e8e1c14c61e54253098521127cd5ac0b959dd32.tar.xz | |
scsi: lpfc: Add WQ Full Logic for NVME Target
I/O conditions on the nvme target may have the driver submitting to a
full hardware wq. The hardware wq is a shared resource among all nvme
controllers. When the driver hit a full wq, it failed the io posting
back to the nvme-fc transport, which then escalated it into errors.
Correct by maintaining a sideband queue within the driver that is added
to when the WQ full condition is hit, and drained from as soon as new WQ
space opens up.
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>
Diffstat (limited to 'drivers/scsi/lpfc/lpfc_sli4.h')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_sli4.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/scsi/lpfc/lpfc_sli4.h b/drivers/scsi/lpfc/lpfc_sli4.h index a9af9980fc43..ac81bfa59278 100644 --- a/drivers/scsi/lpfc/lpfc_sli4.h +++ b/drivers/scsi/lpfc/lpfc_sli4.h @@ -145,6 +145,7 @@ struct lpfc_rqb { struct lpfc_queue { struct list_head list; struct list_head wq_list; + struct list_head wqfull_list; enum lpfc_sli4_queue_type type; enum lpfc_sli4_queue_subtype subtype; struct lpfc_hba *phba; @@ -173,9 +174,11 @@ struct lpfc_queue { #define LPFC_EXPANDED_PAGE_SIZE 16384 #define LPFC_DEFAULT_PAGE_SIZE 4096 uint16_t chann; /* IO channel this queue is associated with */ - uint16_t db_format; + uint8_t db_format; #define LPFC_DB_RING_FORMAT 0x01 #define LPFC_DB_LIST_FORMAT 0x02 + uint8_t q_flag; +#define HBA_NVMET_WQFULL 0x1 /* We hit WQ Full condition for NVMET */ void __iomem *db_regaddr; /* For q stats */ uint32_t q_cnt_1; |