diff options
author | Matthew Wilcox <matthew@wil.cx> | 2007-10-02 21:55:39 -0400 |
---|---|---|
committer | James Bottomley <jejb@mulgrave.localdomain> | 2007-10-12 14:53:56 -0400 |
commit | 52c334e9450a15230b84ab4ef8ef7b034b37c371 (patch) | |
tree | 7801f2f5a481d1a8992cb9b7c14a0334f30514d6 /drivers/scsi | |
parent | fd625f4705977de1ad00ac3cb519ec3ee8fd8598 (diff) | |
download | linux-52c334e9450a15230b84ab4ef8ef7b034b37c371.tar.gz linux-52c334e9450a15230b84ab4ef8ef7b034b37c371.tar.bz2 linux-52c334e9450a15230b84ab4ef8ef7b034b37c371.zip |
[SCSI] advansys: convert to use the data buffer accessors
- remove the unnecessary map_single path.
- convert to use the new accessors for the sg lists and the parameters.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
- convert the statistics to not distinguish between single and sg xfers
- replace ASC_CEILING with DIV_ROUND_UP
- remove an obsolete comment
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi')
-rw-r--r-- | drivers/scsi/advansys.c | 236 |
1 files changed, 52 insertions, 184 deletions
diff --git a/drivers/scsi/advansys.c b/drivers/scsi/advansys.c index ab9108293d0f..d35897eaa807 100644 --- a/drivers/scsi/advansys.c +++ b/drivers/scsi/advansys.c @@ -2223,8 +2223,6 @@ do { \ (((struct asc_board *) shost_priv(shost))->asc_stats.counter += (count)) #endif /* ADVANSYS_STATS */ -#define ASC_CEILING(val, unit) (((val) + ((unit) - 1))/(unit)) - /* If the result wraps when calculating tenths, return 0. */ #define ASC_TENTHS(num, den) \ (((10 * ((num)/(den))) > (((num) * 10)/(den))) ? \ @@ -2356,11 +2354,9 @@ struct asc_stats { ADV_DCNT exe_error; /* # ASC_ERROR returns. */ ADV_DCNT exe_unknown; /* # unknown returns. */ /* Data Transfer Statistics */ - ADV_DCNT cont_cnt; /* # non-scatter-gather I/O requests received */ - ADV_DCNT cont_xfer; /* # contiguous transfer 512-bytes */ - ADV_DCNT sg_cnt; /* # scatter-gather I/O requests received */ - ADV_DCNT sg_elem; /* # scatter-gather elements */ - ADV_DCNT sg_xfer; /* # scatter-gather transfer 512-bytes */ + ADV_DCNT xfer_cnt; /* # I/O requests received */ + ADV_DCNT xfer_elem; /* # scatter-gather elements */ + ADV_DCNT xfer_sect; /* # 512-byte blocks */ }; #endif /* ADVANSYS_STATS */ @@ -4057,57 +4053,32 @@ static int asc_prt_board_stats(struct Scsi_Host *shost, char *cp, int cplen) /* * Display data transfer statistics. */ - if (s->cont_cnt > 0) { - len = asc_prt_line(cp, leftlen, " cont_cnt %lu, ", s->cont_cnt); - ASC_PRT_NEXT(); - - len = asc_prt_line(cp, leftlen, "cont_xfer %lu.%01lu kb ", - s->cont_xfer / 2, - ASC_TENTHS(s->cont_xfer, 2)); - ASC_PRT_NEXT(); - - /* Contiguous transfer average size */ - len = asc_prt_line(cp, leftlen, "avg_xfer %lu.%01lu kb\n", - (s->cont_xfer / 2) / s->cont_cnt, - ASC_TENTHS((s->cont_xfer / 2), s->cont_cnt)); - ASC_PRT_NEXT(); - } - - if (s->sg_cnt > 0) { - - len = asc_prt_line(cp, leftlen, " sg_cnt %lu, sg_elem %lu, ", - s->sg_cnt, s->sg_elem); + if (s->xfer_cnt > 0) { + len = asc_prt_line(cp, leftlen, " xfer_cnt %lu, xfer_elem %lu, ", + s->xfer_cnt, s->xfer_elem); ASC_PRT_NEXT(); - len = asc_prt_line(cp, leftlen, "sg_xfer %lu.%01lu kb\n", - s->sg_xfer / 2, ASC_TENTHS(s->sg_xfer, 2)); + len = asc_prt_line(cp, leftlen, "xfer_bytes %lu.%01lu kb\n", + s->xfer_sect / 2, ASC_TENTHS(s->xfer_sect, 2)); ASC_PRT_NEXT(); /* Scatter gather transfer statistics */ len = asc_prt_line(cp, leftlen, " avg_num_elem %lu.%01lu, ", - s->sg_elem / s->sg_cnt, - ASC_TENTHS(s->sg_elem, s->sg_cnt)); + s->xfer_elem / s->xfer_cnt, + ASC_TENTHS(s->xfer_elem, s->xfer_cnt)); ASC_PRT_NEXT(); len = asc_prt_line(cp, leftlen, "avg_elem_size %lu.%01lu kb, ", - (s->sg_xfer / 2) / s->sg_elem, - ASC_TENTHS((s->sg_xfer / 2), s->sg_elem)); + (s->xfer_sect / 2) / s->xfer_elem, + ASC_TENTHS((s->xfer_sect / 2), s->xfer_elem)); ASC_PRT_NEXT(); len = asc_prt_line(cp, leftlen, "avg_xfer_size %lu.%01lu kb\n", - (s->sg_xfer / 2) / s->sg_cnt, - ASC_TENTHS((s->sg_xfer / 2), s->sg_cnt)); + (s->xfer_sect / 2) / s->xfer_cnt, + ASC_TENTHS((s->xfer_sect / 2), s->xfer_cnt)); ASC_PRT_NEXT(); } - /* - * Display request queuing statistics. - */ - len = asc_prt_line(cp, leftlen, - " Active and Waiting Request Queues (Time Unit: %d HZ):\n", - HZ); - ASC_PRT_NEXT(); - return totlen; } #endif /* ADVANSYS_STATS */ @@ -4301,18 +4272,8 @@ advansys_proc_info(struct Scsi_Host *shost, char *buffer, char **start, static void asc_scsi_done(struct scsi_cmnd *scp) { - struct asc_board *boardp = shost_priv(scp->device->host); - - if (scp->use_sg) - dma_unmap_sg(boardp->dev, - (struct scatterlist *)scp->request_buffer, - scp->use_sg, scp->sc_data_direction); - else if (scp->request_bufflen) - dma_unmap_single(boardp->dev, scp->SCp.dma_handle, - scp->request_bufflen, scp->sc_data_direction); - + scsi_dma_unmap(scp); ASC_STATS(scp->device->host, done); - scp->scsi_done(scp); } @@ -8210,11 +8171,11 @@ static void adv_isr_callback(ADV_DVC_VAR *adv_dvc_varp, ADV_SCSI_REQ_Q *scsiqp) * then return the number of underrun bytes. */ resid_cnt = le32_to_cpu(scsiqp->data_cnt); - if (scp->request_bufflen != 0 && resid_cnt != 0 && - resid_cnt <= scp->request_bufflen) { + if (scsi_bufflen(scp) != 0 && resid_cnt != 0 && + resid_cnt <= scsi_bufflen(scp)) { ASC_DBG(1, "underrun condition %lu bytes\n", (ulong)resid_cnt); - scp->resid = resid_cnt; + scsi_set_resid(scp, resid_cnt); } break; @@ -9148,11 +9109,11 @@ static void asc_isr_callback(ASC_DVC_VAR *asc_dvc_varp, ASC_QDONE_INFO *qdonep) * If there was no error and an underrun condition, then * return the number of underrun bytes. */ - if (scp->request_bufflen != 0 && qdonep->remain_bytes != 0 && - qdonep->remain_bytes <= scp->request_bufflen) { + if (scsi_bufflen(scp) != 0 && qdonep->remain_bytes != 0 && + qdonep->remain_bytes <= scsi_bufflen(scp)) { ASC_DBG(1, "underrun condition %u bytes\n", (unsigned)qdonep->remain_bytes); - scp->resid = qdonep->remain_bytes; + scsi_set_resid(scp, qdonep->remain_bytes); } break; @@ -9877,6 +9838,8 @@ static int advansys_slave_configure(struct scsi_device *sdev) static int asc_build_req(struct asc_board *boardp, struct scsi_cmnd *scp, struct asc_scsi_q *asc_scsi_q) { + int use_sg; + memset(asc_scsi_q, 0, sizeof(*asc_scsi_q)); /* @@ -9915,55 +9878,26 @@ static int asc_build_req(struct asc_board *boardp, struct scsi_cmnd *scp, asc_scsi_q->q2.tag_code = MSG_SIMPLE_TAG; } - /* - * Build ASC_SCSI_Q for a contiguous buffer or a scatter-gather - * buffer command. - */ - if (scp->use_sg == 0) { - /* - * CDB request of single contiguous buffer. - */ - ASC_STATS(scp->device->host, cont_cnt); - scp->SCp.dma_handle = scp->request_bufflen ? - dma_map_single(boardp->dev, scp->request_buffer, - scp->request_bufflen, - scp->sc_data_direction) : 0; - asc_scsi_q->q1.data_addr = cpu_to_le32(scp->SCp.dma_handle); - asc_scsi_q->q1.data_cnt = cpu_to_le32(scp->request_bufflen); - ASC_STATS_ADD(scp->device->host, cont_xfer, - ASC_CEILING(scp->request_bufflen, 512)); - asc_scsi_q->q1.sg_queue_cnt = 0; - asc_scsi_q->sg_head = NULL; - } else { - /* - * CDB scatter-gather request list. - */ + /* Build ASC_SCSI_Q */ + use_sg = scsi_dma_map(scp); + if (use_sg != 0) { int sgcnt; - int use_sg; struct scatterlist *slp; struct asc_sg_head *asc_sg_head; - slp = (struct scatterlist *)scp->request_buffer; - use_sg = dma_map_sg(boardp->dev, slp, scp->use_sg, - scp->sc_data_direction); - if (use_sg > scp->device->host->sg_tablesize) { scmd_printk(KERN_ERR, scp, "use_sg %d > " "sg_tablesize %d\n", use_sg, scp->device->host->sg_tablesize); - dma_unmap_sg(boardp->dev, slp, scp->use_sg, - scp->sc_data_direction); + scsi_dma_unmap(scp); scp->result = HOST_BYTE(DID_ERROR); return ASC_ERROR; } - ASC_STATS(scp->device->host, sg_cnt); - asc_sg_head = kzalloc(sizeof(asc_scsi_q->sg_head) + use_sg * sizeof(struct asc_sg_list), GFP_ATOMIC); if (!asc_sg_head) { - dma_unmap_sg(boardp->dev, slp, scp->use_sg, - scp->sc_data_direction); + scsi_dma_unmap(scp); scp->result = HOST_BYTE(DID_SOFT_ERROR); return ASC_ERROR; } @@ -9974,22 +9908,24 @@ static int asc_build_req(struct asc_board *boardp, struct scsi_cmnd *scp, asc_scsi_q->q1.data_addr = 0; /* This is a byte value, otherwise it would need to be swapped. */ asc_sg_head->entry_cnt = asc_scsi_q->q1.sg_queue_cnt = use_sg; - ASC_STATS_ADD(scp->device->host, sg_elem, + ASC_STATS_ADD(scp->device->host, xfer_elem, asc_sg_head->entry_cnt); /* * Convert scatter-gather list into ASC_SG_HEAD list. */ - for (sgcnt = 0; sgcnt < use_sg; sgcnt++, slp++) { + scsi_for_each_sg(scp, slp, use_sg, sgcnt) { asc_sg_head->sg_list[sgcnt].addr = cpu_to_le32(sg_dma_address(slp)); asc_sg_head->sg_list[sgcnt].bytes = cpu_to_le32(sg_dma_len(slp)); - ASC_STATS_ADD(scp->device->host, sg_xfer, - ASC_CEILING(sg_dma_len(slp), 512)); + ASC_STATS_ADD(scp->device->host, xfer_sect, + DIV_ROUND_UP(sg_dma_len(slp), 512)); } } + ASC_STATS(scp->device->host, xfer_cnt); + ASC_DBG_PRT_ASC_SCSI_Q(2, asc_scsi_q); ASC_DBG_PRT_CDB(1, scp->cmnd, scp->cmd_len); @@ -10021,7 +9957,7 @@ adv_get_sglist(struct asc_board *boardp, adv_req_t *reqp, struct scsi_cmnd *scp, int i; scsiqp = (ADV_SCSI_REQ_Q *)ADV_32BALIGN(&reqp->scsi_req_q); - slp = (struct scatterlist *)scp->request_buffer; + slp = scsi_sglist(scp); sg_elem_cnt = use_sg; prev_sg_block = NULL; reqp->sgblkp = NULL; @@ -10093,8 +10029,8 @@ adv_get_sglist(struct asc_board *boardp, adv_req_t *reqp, struct scsi_cmnd *scp, cpu_to_le32(sg_dma_address(slp)); sg_block->sg_list[i].sg_count = cpu_to_le32(sg_dma_len(slp)); - ASC_STATS_ADD(scp->device->host, sg_xfer, - ASC_CEILING(sg_dma_len(slp), 512)); + ASC_STATS_ADD(scp->device->host, xfer_sect, + DIV_ROUND_UP(sg_dma_len(slp), 512)); if (--sg_elem_cnt == 0) { /* Last ADV_SG_BLOCK and scatter-gather entry. */ sg_block->sg_cnt = i + 1; @@ -10126,6 +10062,7 @@ adv_build_req(struct asc_board *boardp, struct scsi_cmnd *scp, ADV_SCSI_REQ_Q *scsiqp; int i; int ret; + int use_sg; /* * Allocate an adv_req_t structure from the board to execute @@ -10182,54 +10119,24 @@ adv_build_req(struct asc_board *boardp, struct scsi_cmnd *scp, scsiqp->sense_addr = cpu_to_le32(virt_to_bus(&scp->sense_buffer[0])); scsiqp->sense_len = sizeof(scp->sense_buffer); - /* - * Build ADV_SCSI_REQ_Q for a contiguous buffer or a scatter-gather - * buffer command. - */ + /* Build ADV_SCSI_REQ_Q */ - scsiqp->data_cnt = cpu_to_le32(scp->request_bufflen); - scsiqp->vdata_addr = scp->request_buffer; - scsiqp->data_addr = cpu_to_le32(virt_to_bus(scp->request_buffer)); - - if (scp->use_sg == 0) { - /* - * CDB request of single contiguous buffer. - */ + use_sg = scsi_dma_map(scp); + if (use_sg == 0) { + /* Zero-length transfer */ reqp->sgblkp = NULL; - scsiqp->data_cnt = cpu_to_le32(scp->request_bufflen); - if (scp->request_bufflen) { - scsiqp->vdata_addr = scp->request_buffer; - scp->SCp.dma_handle = - dma_map_single(boardp->dev, scp->request_buffer, - scp->request_bufflen, - scp->sc_data_direction); - } else { - scsiqp->vdata_addr = NULL; - scp->SCp.dma_handle = 0; - } - scsiqp->data_addr = cpu_to_le32(scp->SCp.dma_handle); + scsiqp->data_cnt = 0; + scsiqp->vdata_addr = NULL; + + scsiqp->data_addr = 0; scsiqp->sg_list_ptr = NULL; scsiqp->sg_real_addr = 0; - ASC_STATS(scp->device->host, cont_cnt); - ASC_STATS_ADD(scp->device->host, cont_xfer, - ASC_CEILING(scp->request_bufflen, 512)); } else { - /* - * CDB scatter-gather request list. - */ - struct scatterlist *slp; - int use_sg; - - slp = (struct scatterlist *)scp->request_buffer; - use_sg = dma_map_sg(boardp->dev, slp, scp->use_sg, - scp->sc_data_direction); - if (use_sg > ADV_MAX_SG_LIST) { scmd_printk(KERN_ERR, scp, "use_sg %d > " "ADV_MAX_SG_LIST %d\n", use_sg, scp->device->host->sg_tablesize); - dma_unmap_sg(boardp->dev, slp, scp->use_sg, - scp->sc_data_direction); + scsi_dma_unmap(scp); scp->result = HOST_BYTE(DID_ERROR); /* @@ -10242,6 +10149,8 @@ adv_build_req(struct asc_board *boardp, struct scsi_cmnd *scp, return ASC_ERROR; } + scsiqp->data_cnt = cpu_to_le32(scsi_bufflen(scp)); + ret = adv_get_sglist(boardp, reqp, scp, use_sg); if (ret != ADV_SUCCESS) { /* @@ -10254,10 +10163,11 @@ adv_build_req(struct asc_board *boardp, struct scsi_cmnd *scp, return ret; } - ASC_STATS(scp->device->host, sg_cnt); - ASC_STATS_ADD(scp->device->host, sg_elem, use_sg); + ASC_STATS_ADD(scp->device->host, xfer_elem, use_sg); } + ASC_STATS(scp->device->host, xfer_cnt); + ASC_DBG_PRT_ADV_SCSI_REQ_Q(2, scsiqp); ASC_DBG_PRT_CDB(1, scp->cmnd, scp->cmd_len); @@ -10955,48 +10865,6 @@ static int AdvExeScsiQueue(ADV_DVC_VAR *asc_dvc, ADV_SCSI_REQ_Q *scsiq) /* * Execute a single 'Scsi_Cmnd'. - * - * The function 'done' is called when the request has been completed. - * - * Scsi_Cmnd: - * - * host - board controlling device - * device - device to send command - * target - target of device - * lun - lun of device - * cmd_len - length of SCSI CDB - * cmnd - buffer for SCSI 8, 10, or 12 byte CDB - * use_sg - if non-zero indicates scatter-gather request with use_sg elements - * - * if (use_sg == 0) { - * request_buffer - buffer address for request - * request_bufflen - length of request buffer - * } else { - * request_buffer - pointer to scatterlist structure - * } - * - * sense_buffer - sense command buffer - * - * result (4 bytes of an int): - * Byte Meaning - * 0 SCSI Status Byte Code - * 1 SCSI One Byte Message Code - * 2 Host Error Code - * 3 Mid-Level Error Code - * - * host driver fields: - * SCp - Scsi_Pointer used for command processing status - * scsi_done - used to save caller's done function - * host_scribble - used for pointer to another struct scsi_cmnd - * - * If this function returns ASC_NOERROR the request will be completed - * from the interrupt handler. - * - * If this function returns ASC_ERROR the host error code has been set, - * and the called must call asc_scsi_done. - * - * If ASC_BUSY is returned the request will be returned to the midlayer - * and re-tried later. */ static int asc_execute_scsi_cmnd(struct scsi_cmnd *scp) { |