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scsi: lpfc: Add embedded data pointers for enhanced performance

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The current driver isn't taking advantage of a performance hint whereby
the initial data buffer descriptor can be placed in the WQE as well as
the SGL.

Add the logic to detect support for the feature and to use it when
supported.

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>
This commit is contained in:
James Smart
2018-02-22 08:18:48 -08:00
committed by Martin K. Petersen
parent 1feb8204a1
commit 0bc2b7c531
7 changed files with 94 additions and 6 deletions
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25
drivers/scsi/lpfc/lpfc_sli.c
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@@ -6958,10 +6958,15 @@ lpfc_sli4_hba_setup(struct lpfc_hba *phba)
"0378 No support for fcpi mode.\n");
ftr_rsp++;
}
if (bf_get(lpfc_mbx_rq_ftr_rsp_perfh, &mqe->un.req_ftrs))
phba->sli3_options |= LPFC_SLI4_PERFH_ENABLED;
else
phba->sli3_options &= ~LPFC_SLI4_PERFH_ENABLED;
/* Performance Hints are ONLY for FCoE */
if (phba->hba_flag & HBA_FCOE_MODE) {
if (bf_get(lpfc_mbx_rq_ftr_rsp_perfh, &mqe->un.req_ftrs))
phba->sli3_options |= LPFC_SLI4_PERFH_ENABLED;
else
phba->sli3_options &= ~LPFC_SLI4_PERFH_ENABLED;
}
/*
* If the port cannot support the host's requested features
* then turn off the global config parameters to disable the
@@ -9063,6 +9068,12 @@ lpfc_sli4_iocb2wqe(struct lpfc_hba *phba, struct lpfc_iocbq *iocbq,
}
/* Note, word 10 is already initialized to 0 */
/* Don't set PBDE for Perf hints, just fcp_embed_pbde */
if (phba->fcp_embed_pbde)
bf_set(wqe_pbde, &wqe->fcp_iwrite.wqe_com, 1);
else
bf_set(wqe_pbde, &wqe->fcp_iwrite.wqe_com, 0);
if (phba->fcp_embed_io) {
struct lpfc_scsi_buf *lpfc_cmd;
struct sli4_sge *sgl;
@@ -9122,6 +9133,12 @@ lpfc_sli4_iocb2wqe(struct lpfc_hba *phba, struct lpfc_iocbq *iocbq,
}
/* Note, word 10 is already initialized to 0 */
/* Don't set PBDE for Perf hints, just fcp_embed_pbde */
if (phba->fcp_embed_pbde)
bf_set(wqe_pbde, &wqe->fcp_iread.wqe_com, 1);
else
bf_set(wqe_pbde, &wqe->fcp_iread.wqe_com, 0);
if (phba->fcp_embed_io) {
struct lpfc_scsi_buf *lpfc_cmd;
struct sli4_sge *sgl;