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| author | James Smart | 2018-02-22 17:18:50 +0100 |
|---|---|---|
| committer | Martin K. Petersen | 2018-02-23 02:39:29 +0100 |
| commit | 4e565cf04138fca6ffeb884044febf922b2306d0 (patch) | |
| tree | f3a195ce30d8447824e800ee437b539535c5d6fb /drivers/scsi/lpfc/lpfc_init.c | |
| parent | scsi: lpfc: Fix nvme embedded io length on new hardware (diff) | |
| download | kernel-qcow2-linux-4e565cf04138fca6ffeb884044febf922b2306d0.tar.gz kernel-qcow2-linux-4e565cf04138fca6ffeb884044febf922b2306d0.tar.xz kernel-qcow2-linux-4e565cf04138fca6ffeb884044febf922b2306d0.zip | |
scsi: lpfc: Work around NVME cmd iu SGL type
The hardware offload for NVME commands was created when the
FC-NVME standard was setting SGL Descriptor Type to SGL Data
Block Descriptor (0h) and SGL Descriptor Sub Type to Address (0h).
A late change in NVMe-over-Fabrics obsoleted these values, creating
a transport SGL descriptor type with new values to go into these
fields.
For initial hardware support, in order to be compliant to the spec,
use host-supplied cmd IU buffers instead of the adapter generated
values. Later hardware will correct this.
Add a module parameter to override this offload disablement if looking
for lowest latency. This is reasonable as nothing in FC-NVME uses
the SQE SGL values.
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/lpfc/lpfc_init.c')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_init.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c index ecb42cae71f2..50bc6c6efa87 100644 --- a/drivers/scsi/lpfc/lpfc_init.c +++ b/drivers/scsi/lpfc/lpfc_init.c @@ -10653,11 +10653,11 @@ lpfc_get_sli4_parameters(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq) phba->fcp_embed_io = 0; lpfc_printf_log(phba, KERN_INFO, LOG_INIT | LOG_NVME, - "6422 XIB %d: FCP %d %d NVME %d %d %d\n", + "6422 XIB %d: FCP %d %d NVME %d %d %d %d\n", bf_get(cfg_xib, mbx_sli4_parameters), phba->fcp_embed_pbde, phba->fcp_embed_io, phba->nvme_support, phba->nvme_embed_pbde, - phba->cfg_suppress_rsp); + phba->cfg_nvme_embed_cmd, phba->cfg_suppress_rsp); if ((bf_get(cfg_cqpsize, mbx_sli4_parameters) & LPFC_CQ_16K_PAGE_SZ) && (bf_get(cfg_wqpsize, mbx_sli4_parameters) & LPFC_WQ_16K_PAGE_SZ) && |