From a0b4f78f9a4c869e9b29f254054ad7441cb40bbf Mon Sep 17 00:00:00 2001 From: FUJITA Tomonori Date: Sun, 17 Jun 2007 19:56:39 -0500 Subject: [PATCH] [SCSI] lpfc: convert to use the data buffer accessors This patch is a reworked version of the data buffer accessors patch so that it applies on the NPIV sources. The original patch was developed and submitted by Fujita Tomonori: FUJITA Tomonori http://marc.info/?l=linux-scsi&m=117896446832171&w=2 - remove the unnecessary map_single path. - convert to use the new accessors for the sg lists and the parameters. Signed-off-by: FUJITA Tomonori Signed-off-by: James Smart Signed-off-by: James Bottomley --- drivers/scsi/lpfc/lpfc_scsi.c | 111 +++++++++++------------------------------- 1 file changed, 28 insertions(+), 83 deletions(-) diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c index 2de4c4e..5d2e3de 100644 --- a/drivers/scsi/lpfc/lpfc_scsi.c +++ b/drivers/scsi/lpfc/lpfc_scsi.c @@ -321,13 +321,9 @@ lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl; IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; - uint32_t vpi = (lpfc_cmd->cur_iocbq.vport - ? lpfc_cmd->cur_iocbq.vport->vpi - : 0); dma_addr_t physaddr; uint32_t i, num_bde = 0; - int datadir = scsi_cmnd->sc_data_direction; - int dma_error; + int nseg, datadir = scsi_cmnd->sc_data_direction; /* * There are three possibilities here - use scatter-gather segment, use @@ -336,26 +332,22 @@ lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) * data bde entry. */ bpl += 2; - if (scsi_cmnd->use_sg) { + nseg = scsi_dma_map(scsi_cmnd); + if (nseg > 0) { /* * The driver stores the segment count returned from pci_map_sg * because this a count of dma-mappings used to map the use_sg * pages. They are not guaranteed to be the same for those * architectures that implement an IOMMU. */ - sgel = (struct scatterlist *)scsi_cmnd->request_buffer; - lpfc_cmd->seg_cnt = dma_map_sg(&phba->pcidev->dev, sgel, - scsi_cmnd->use_sg, datadir); - if (lpfc_cmd->seg_cnt == 0) - return 1; + lpfc_cmd->seg_cnt = nseg; if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { printk(KERN_ERR "%s: Too many sg segments from " "dma_map_sg. Config %d, seg_cnt %d", __FUNCTION__, phba->cfg_sg_seg_cnt, lpfc_cmd->seg_cnt); - dma_unmap_sg(&phba->pcidev->dev, sgel, - lpfc_cmd->seg_cnt, datadir); + scsi_dma_unmap(scsi_cmnd); return 1; } @@ -365,7 +357,7 @@ lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) * single scsi command. Just run through the seg_cnt and format * the bde's. */ - for (i = 0; i < lpfc_cmd->seg_cnt; i++) { + scsi_for_each_sg(scsi_cmnd, sgel, nseg, i) { physaddr = sg_dma_address(sgel); bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr)); bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr)); @@ -376,35 +368,10 @@ lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) bpl->tus.f.bdeFlags = BUFF_USE_RCV; bpl->tus.w = le32_to_cpu(bpl->tus.w); bpl++; - sgel++; num_bde++; } - } else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) { - physaddr = dma_map_single(&phba->pcidev->dev, - scsi_cmnd->request_buffer, - scsi_cmnd->request_bufflen, - datadir); - dma_error = dma_mapping_error(physaddr); - if (dma_error) { - lpfc_printf_log(phba, KERN_ERR, LOG_FCP, - "%d (%d):0718 Unable to dma_map_single " - "request_buffer: x%x\n", - phba->brd_no, vpi, dma_error); - return 1; - } - - lpfc_cmd->nonsg_phys = physaddr; - bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr)); - bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr)); - bpl->tus.f.bdeSize = scsi_cmnd->request_bufflen; - if (datadir == DMA_TO_DEVICE) - bpl->tus.f.bdeFlags = 0; - else - bpl->tus.f.bdeFlags = BUFF_USE_RCV; - bpl->tus.w = le32_to_cpu(bpl->tus.w); - num_bde = 1; - bpl++; - } + } else if (nseg < 0) + return 1; /* * Finish initializing those IOCB fields that are dependent on the @@ -417,7 +384,7 @@ lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) (num_bde * sizeof (struct ulp_bde64)); iocb_cmd->ulpBdeCount = 1; iocb_cmd->ulpLe = 1; - fcp_cmnd->fcpDl = be32_to_cpu(scsi_cmnd->request_bufflen); + fcp_cmnd->fcpDl = be32_to_cpu(scsi_bufflen(scsi_cmnd)); return 0; } @@ -430,16 +397,8 @@ lpfc_scsi_unprep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb) * a request buffer, but did not request use_sg. There is a third * case, but it does not require resource deallocation. */ - if ((psb->seg_cnt > 0) && (psb->pCmd->use_sg)) { - dma_unmap_sg(&phba->pcidev->dev, psb->pCmd->request_buffer, - psb->seg_cnt, psb->pCmd->sc_data_direction); - } else { - if ((psb->nonsg_phys) && (psb->pCmd->request_bufflen)) { - dma_unmap_single(&phba->pcidev->dev, psb->nonsg_phys, - psb->pCmd->request_bufflen, - psb->pCmd->sc_data_direction); - } - } + if (psb->seg_cnt > 0) + scsi_dma_unmap(psb->pCmd); } static void @@ -502,15 +461,15 @@ lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, } } - cmnd->resid = 0; + scsi_set_resid(cmnd, 0); if (resp_info & RESID_UNDER) { - cmnd->resid = be32_to_cpu(fcprsp->rspResId); + scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId)); lpfc_printf_log(phba, KERN_INFO, LOG_FCP, "%d (%d):0716 FCP Read Underrun, expected %d, " "residual %d Data: x%x x%x x%x\n", phba->brd_no, vpi, be32_to_cpu(fcpcmd->fcpDl), - cmnd->resid, fcpi_parm, cmnd->cmnd[0], + scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0], cmnd->underflow); /* @@ -520,15 +479,16 @@ lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, */ if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) && fcpi_parm && - (cmnd->resid != fcpi_parm)) { + (scsi_get_resid(cmnd) != fcpi_parm)) { lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR, "%d (%d):0735 FCP Read Check Error " "and Underrun Data: x%x x%x x%x x%x\n", phba->brd_no, vpi, be32_to_cpu(fcpcmd->fcpDl), - cmnd->resid, fcpi_parm, cmnd->cmnd[0]); - cmnd->resid = cmnd->request_bufflen; + scsi_get_resid(cmnd), fcpi_parm, + cmnd->cmnd[0]); + scsi_set_resid(cmnd, scsi_bufflen(cmnd)); host_status = DID_ERROR; } /* @@ -539,15 +499,15 @@ lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, */ if (!(resp_info & SNS_LEN_VALID) && (scsi_status == SAM_STAT_GOOD) && - (cmnd->request_bufflen - cmnd->resid) < cmnd->underflow) { + (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) + < cmnd->underflow)) { lpfc_printf_log(phba, KERN_INFO, LOG_FCP, "%d (%d):0717 FCP command x%x residual " "underrun converted to error " "Data: x%x x%x x%x\n", phba->brd_no, vpi, cmnd->cmnd[0], - cmnd->request_bufflen, cmnd->resid, - cmnd->underflow); - + cmnd->request_bufflen, + scsi_get_resid(cmnd), cmnd->underflow); host_status = DID_ERROR; } } else if (resp_info & RESID_OVER) { @@ -555,7 +515,7 @@ lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, "%d (%d):0720 FCP command x%x residual " "overrun error. Data: x%x x%x \n", phba->brd_no, vpi, cmnd->cmnd[0], - cmnd->request_bufflen, cmnd->resid); + scsi_bufflen(cmnd), scsi_get_resid(cmnd)); host_status = DID_ERROR; /* @@ -572,7 +532,7 @@ lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, be32_to_cpu(fcprsp->rspResId), fcpi_parm, cmnd->cmnd[0]); host_status = DID_ERROR; - cmnd->resid = cmnd->request_bufflen; + scsi_set_resid(cmnd, scsi_bufflen(cmnd)); } out: @@ -652,7 +612,8 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn, "x%x SNS x%x x%x Data: x%x x%x\n", phba->brd_no, vpi, cmd->device->id, cmd->device->lun, cmd, cmd->result, - *lp, *(lp + 3), cmd->retries, cmd->resid); + *lp, *(lp + 3), cmd->retries, + scsi_get_resid(cmd)); } result = cmd->result; @@ -767,22 +728,7 @@ lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first * data bde entry. */ - if (scsi_cmnd->use_sg) { - if (datadir == DMA_TO_DEVICE) { - iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR; - iocb_cmd->un.fcpi.fcpi_parm = 0; - iocb_cmd->ulpPU = 0; - fcp_cmnd->fcpCntl3 = WRITE_DATA; - phba->fc4OutputRequests++; - } else { - iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR; - iocb_cmd->ulpPU = PARM_READ_CHECK; - iocb_cmd->un.fcpi.fcpi_parm = - scsi_cmnd->request_bufflen; - fcp_cmnd->fcpCntl3 = READ_DATA; - phba->fc4InputRequests++; - } - } else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) { + if (scsi_sg_count(scsi_cmnd)) { if (datadir == DMA_TO_DEVICE) { iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR; iocb_cmd->un.fcpi.fcpi_parm = 0; @@ -792,8 +738,7 @@ lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, } else { iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR; iocb_cmd->ulpPU = PARM_READ_CHECK; - iocb_cmd->un.fcpi.fcpi_parm = - scsi_cmnd->request_bufflen; + iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd); fcp_cmnd->fcpCntl3 = READ_DATA; phba->fc4InputRequests++; } -- 2.7.4