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| author | James Smart <jsmart2021@gmail.com> | 2018-01-30 15:58:49 -0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2018-02-12 11:43:23 -0500 |
| commit | 6e8e1c14c61e54253098521127cd5ac0b959dd32 (patch) | |
| tree | 22e7873a5706acf590ec091fe326d95739baadc6 /drivers/scsi/lpfc/lpfc_nvmet.h | |
| parent | 8ae337013674d5c1e803429356b85cba2ce12067 (diff) | |
| download | blackbird-obmc-linux-6e8e1c14c61e54253098521127cd5ac0b959dd32.tar.gz blackbird-obmc-linux-6e8e1c14c61e54253098521127cd5ac0b959dd32.zip | |
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_nvmet.h')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_nvmet.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/scsi/lpfc/lpfc_nvmet.h b/drivers/scsi/lpfc/lpfc_nvmet.h index 5b32c9e4d4ef..354cce443c9f 100644 --- a/drivers/scsi/lpfc/lpfc_nvmet.h +++ b/drivers/scsi/lpfc/lpfc_nvmet.h @@ -132,6 +132,7 @@ struct lpfc_nvmet_rcv_ctx { #define LPFC_NVMET_CTX_RLS 0x8 /* ctx free requested */ #define LPFC_NVMET_ABTS_RCV 0x10 /* ABTS received on exchange */ #define LPFC_NVMET_DEFER_RCV_REPOST 0x20 /* repost to RQ on defer rcv */ +#define LPFC_NVMET_DEFER_WQFULL 0x40 /* Waiting on a free WQE */ struct rqb_dmabuf *rqb_buffer; struct lpfc_nvmet_ctxbuf *ctxbuf; |
