diff options
| author | James Smart <james.smart@emulex.com> | 2012-08-03 12:35:44 -0400 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2012-09-14 14:38:33 +0100 |
| commit | 027140eab7d45f406e3397cc9373767d191ac6b4 (patch) | |
| tree | c88a6d3debb9bfd0f4dca64250b8eba3eef52006 /drivers/scsi/lpfc/lpfc_scsi.c | |
| parent | 7e56aa25e3510ae72f0feada4b2d04eda48f95db (diff) | |
| download | linux-027140eab7d45f406e3397cc9373767d191ac6b4.tar.bz2 | |
[SCSI] lpfc 8.3.33: Misc changes to optimize critical path
Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/lpfc/lpfc_scsi.c')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_scsi.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c index bb9a2249b75d..f035f3c7ec09 100644 --- a/drivers/scsi/lpfc/lpfc_scsi.c +++ b/drivers/scsi/lpfc/lpfc_scsi.c @@ -3919,6 +3919,8 @@ lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq); int datadir = scsi_cmnd->sc_data_direction; char tag[2]; + uint8_t *ptr; + bool sli4; if (!pnode || !NLP_CHK_NODE_ACT(pnode)) return; @@ -3930,8 +3932,13 @@ lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, int_to_scsilun(lpfc_cmd->pCmd->device->lun, &lpfc_cmd->fcp_cmnd->fcp_lun); - memset(&fcp_cmnd->fcpCdb[0], 0, LPFC_FCP_CDB_LEN); - memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, scsi_cmnd->cmd_len); + ptr = &fcp_cmnd->fcpCdb[0]; + memcpy(ptr, scsi_cmnd->cmnd, scsi_cmnd->cmd_len); + if (scsi_cmnd->cmd_len < LPFC_FCP_CDB_LEN) { + ptr += scsi_cmnd->cmd_len; + memset(ptr, 0, (LPFC_FCP_CDB_LEN - scsi_cmnd->cmd_len)); + } + if (scsi_populate_tag_msg(scsi_cmnd, tag)) { switch (tag[0]) { case HEAD_OF_QUEUE_TAG: @@ -3947,6 +3954,8 @@ lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, } else fcp_cmnd->fcpCntl1 = 0; + sli4 = (phba->sli_rev == LPFC_SLI_REV4); + /* * There are three possibilities here - use scatter-gather segment, use * the single mapping, or neither. Start the lpfc command prep by @@ -3956,11 +3965,12 @@ lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, if (scsi_sg_count(scsi_cmnd)) { if (datadir == DMA_TO_DEVICE) { iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR; - if (phba->sli_rev < LPFC_SLI_REV4) { + if (sli4) + iocb_cmd->ulpPU = PARM_READ_CHECK; + else { iocb_cmd->un.fcpi.fcpi_parm = 0; iocb_cmd->ulpPU = 0; - } else - iocb_cmd->ulpPU = PARM_READ_CHECK; + } fcp_cmnd->fcpCntl3 = WRITE_DATA; phba->fc4OutputRequests++; } else { @@ -3984,7 +3994,7 @@ lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, * of the scsi_cmnd request_buffer */ piocbq->iocb.ulpContext = pnode->nlp_rpi; - if (phba->sli_rev == LPFC_SLI_REV4) + if (sli4) piocbq->iocb.ulpContext = phba->sli4_hba.rpi_ids[pnode->nlp_rpi]; if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE) |