diff options
| -rw-r--r-- | drivers/scsi/dc395x.c | 163 |
1 files changed, 60 insertions, 103 deletions
diff --git a/drivers/scsi/dc395x.c b/drivers/scsi/dc395x.c index 564ea90ed3a..7b8a3457b69 100644 --- a/drivers/scsi/dc395x.c +++ b/drivers/scsi/dc395x.c @@ -979,6 +979,7 @@ static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) { + int nseg; enum dma_data_direction dir = cmd->sc_data_direction; dprintkdbg(DBG_0, "build_srb: (pid#%li) <%02i-%i>\n", cmd->pid, dcb->target_id, dcb->target_lun); @@ -1000,27 +1001,30 @@ static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb, srb->scsi_phase = PH_BUS_FREE; /* initial phase */ srb->end_message = 0; - if (dir == PCI_DMA_NONE || !cmd->request_buffer) { + nseg = scsi_dma_map(cmd); + BUG_ON(nseg < 0); + + if (dir == PCI_DMA_NONE || !nseg) { dprintkdbg(DBG_0, "build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n", - cmd->bufflen, cmd->request_buffer, - cmd->use_sg, srb->segment_x[0].address); - } else if (cmd->use_sg) { + cmd->bufflen, scsi_sglist(cmd), scsi_sg_count(cmd), + srb->segment_x[0].address); + } else { int i; - u32 reqlen = cmd->request_bufflen; - struct scatterlist *sl = (struct scatterlist *) - cmd->request_buffer; + u32 reqlen = scsi_bufflen(cmd); + struct scatterlist *sg; struct SGentry *sgp = srb->segment_x; - srb->sg_count = pci_map_sg(dcb->acb->dev, sl, cmd->use_sg, - dir); + + srb->sg_count = nseg; + dprintkdbg(DBG_0, - "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n", - reqlen, cmd->request_buffer, cmd->use_sg, - srb->sg_count); + "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n", + reqlen, scsi_sglist(cmd), scsi_sg_count(cmd), + srb->sg_count); - for (i = 0; i < srb->sg_count; i++) { - u32 busaddr = (u32)sg_dma_address(&sl[i]); - u32 seglen = (u32)sl[i].length; + scsi_for_each_sg(cmd, sg, srb->sg_count, i) { + u32 busaddr = (u32)sg_dma_address(sg); + u32 seglen = (u32)sg->length; sgp[i].address = busaddr; sgp[i].length = seglen; srb->total_xfer_length += seglen; @@ -1050,23 +1054,6 @@ static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb, dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n", srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN); - } else { - srb->total_xfer_length = cmd->request_bufflen; - srb->sg_count = 1; - srb->segment_x[0].address = - pci_map_single(dcb->acb->dev, cmd->request_buffer, - srb->total_xfer_length, dir); - - /* Fixup for WIDE padding - make sure length is even */ - if (dcb->sync_period & WIDE_SYNC && srb->total_xfer_length % 2) - srb->total_xfer_length++; - - srb->segment_x[0].length = srb->total_xfer_length; - - dprintkdbg(DBG_0, - "build_srb: [1] len=%d buf=%p use_sg=%d map=%08x\n", - srb->total_xfer_length, cmd->request_buffer, - cmd->use_sg, srb->segment_x[0].address); } srb->request_length = srb->total_xfer_length; @@ -2128,7 +2115,7 @@ static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, /*clear_fifo(acb, "DOP1"); */ /* KG: What is this supposed to be useful for? WIDE padding stuff? */ if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC - && srb->cmd->request_bufflen % 2) { + && scsi_bufflen(srb->cmd) % 2) { d_left_counter = 0; dprintkl(KERN_INFO, "data_out_phase0: Discard 1 byte (0x%02x)\n", @@ -2159,7 +2146,7 @@ static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, sg_update_list(srb, d_left_counter); /* KG: Most ugly hack! Apparently, this works around a chip bug */ if ((srb->segment_x[srb->sg_index].length == - diff && srb->cmd->use_sg) + diff && scsi_sg_count(srb->cmd)) || ((oldxferred & ~PAGE_MASK) == (PAGE_SIZE - diff)) ) { @@ -2289,19 +2276,15 @@ static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, unsigned char *virt, *base = NULL; unsigned long flags = 0; size_t len = left_io; + size_t offset = srb->request_length - left_io; + + local_irq_save(flags); + /* Assumption: it's inside one page as it's at most 4 bytes and + I just assume it's on a 4-byte boundary */ + base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd), + srb->sg_count, &offset, &len); + virt = base + offset; - if (srb->cmd->use_sg) { - size_t offset = srb->request_length - left_io; - local_irq_save(flags); - /* Assumption: it's inside one page as it's at most 4 bytes and - I just assume it's on a 4-byte boundary */ - base = scsi_kmap_atomic_sg((struct scatterlist *)srb->cmd->request_buffer, - srb->sg_count, &offset, &len); - virt = base + offset; - } else { - virt = srb->cmd->request_buffer + srb->cmd->request_bufflen - left_io; - len = left_io; - } left_io -= len; while (len) { @@ -2341,10 +2324,8 @@ static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0); } - if (srb->cmd->use_sg) { - scsi_kunmap_atomic_sg(base); - local_irq_restore(flags); - } + scsi_kunmap_atomic_sg(base); + local_irq_restore(flags); } /*printk(" %08x", *(u32*)(bus_to_virt (addr))); */ /*srb->total_xfer_length = 0; */ @@ -2455,7 +2436,7 @@ static void data_io_transfer(struct AdapterCtlBlk *acb, */ srb->state |= SRB_DATA_XFER; DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0); - if (srb->cmd->use_sg) { /* with S/G */ + if (scsi_sg_count(srb->cmd)) { /* with S/G */ io_dir |= DMACMD_SG; DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR, srb->sg_bus_addr + @@ -2513,18 +2494,14 @@ static void data_io_transfer(struct AdapterCtlBlk *acb, unsigned char *virt, *base = NULL; unsigned long flags = 0; size_t len = left_io; + size_t offset = srb->request_length - left_io; + + local_irq_save(flags); + /* Again, max 4 bytes */ + base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd), + srb->sg_count, &offset, &len); + virt = base + offset; - if (srb->cmd->use_sg) { - size_t offset = srb->request_length - left_io; - local_irq_save(flags); - /* Again, max 4 bytes */ - base = scsi_kmap_atomic_sg((struct scatterlist *)srb->cmd->request_buffer, - srb->sg_count, &offset, &len); - virt = base + offset; - } else { - virt = srb->cmd->request_buffer + srb->cmd->request_bufflen - left_io; - len = left_io; - } left_io -= len; while (len--) { @@ -2536,10 +2513,8 @@ static void data_io_transfer(struct AdapterCtlBlk *acb, sg_subtract_one(srb); } - if (srb->cmd->use_sg) { - scsi_kunmap_atomic_sg(base); - local_irq_restore(flags); - } + scsi_kunmap_atomic_sg(base); + local_irq_restore(flags); } if (srb->dcb->sync_period & WIDE_SYNC) { if (ln % 2) { @@ -3295,7 +3270,8 @@ static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) { struct scsi_cmnd *cmd = srb->cmd; enum dma_data_direction dir = cmd->sc_data_direction; - if (cmd->use_sg && dir != PCI_DMA_NONE) { + + if (scsi_sg_count(cmd) && dir != PCI_DMA_NONE) { /* unmap DC395x SG list */ dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n", srb->sg_bus_addr, SEGMENTX_LEN); @@ -3303,16 +3279,9 @@ static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) SEGMENTX_LEN, PCI_DMA_TODEVICE); dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n", - cmd->use_sg, cmd->request_buffer); + scsi_sg_count(cmd), scsi_bufflen(cmd)); /* unmap the sg segments */ - pci_unmap_sg(acb->dev, - (struct scatterlist *)cmd->request_buffer, - cmd->use_sg, dir); - } else if (cmd->request_buffer && dir != PCI_DMA_NONE) { - dprintkdbg(DBG_SG, "pci_unmap_srb: buffer=%08x(%05x)\n", - srb->segment_x[0].address, cmd->request_bufflen); - pci_unmap_single(acb->dev, srb->segment_x[0].address, - cmd->request_bufflen, dir); + scsi_dma_unmap(cmd); } } @@ -3352,8 +3321,8 @@ static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, dprintkdbg(DBG_1, "srb_done: (pid#%li) <%02i-%i>\n", srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun); dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p\n", - srb, cmd->use_sg, srb->sg_index, srb->sg_count, - cmd->request_buffer); + srb, scsi_sg_count(cmd), srb->sg_index, srb->sg_count, + scsi_sgtalbe(cmd)); status = srb->target_status; if (srb->flag & AUTO_REQSENSE) { dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n"); @@ -3482,16 +3451,10 @@ static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, } } - if (dir != PCI_DMA_NONE) { - if (cmd->use_sg) - pci_dma_sync_sg_for_cpu(acb->dev, - (struct scatterlist *)cmd-> - request_buffer, cmd->use_sg, dir); - else if (cmd->request_buffer) - pci_dma_sync_single_for_cpu(acb->dev, - srb->segment_x[0].address, - cmd->request_bufflen, dir); - } + if (dir != PCI_DMA_NONE && scsi_sg_count(cmd)) + pci_dma_sync_sg_for_cpu(acb->dev, scsi_sglist(cmd), + scsi_sg_count(cmd), dir); + ckc_only = 0; /* Check Error Conditions */ ckc_e: @@ -3500,19 +3463,15 @@ static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, unsigned char *base = NULL; struct ScsiInqData *ptr; unsigned long flags = 0; + struct scatterlist* sg = scsi_sglist(cmd); + size_t offset = 0, len = sizeof(struct ScsiInqData); - if (cmd->use_sg) { - struct scatterlist* sg = (struct scatterlist *)cmd->request_buffer; - size_t offset = 0, len = sizeof(struct ScsiInqData); - - local_irq_save(flags); - base = scsi_kmap_atomic_sg(sg, cmd->use_sg, &offset, &len); - ptr = (struct ScsiInqData *)(base + offset); - } else - ptr = (struct ScsiInqData *)(cmd->request_buffer); + local_irq_save(flags); + base = scsi_kmap_atomic_sg(sg, scsi_sg_count(cmd), &offset, &len); + ptr = (struct ScsiInqData *)(base + offset); if (!ckc_only && (cmd->result & RES_DID) == 0 - && cmd->cmnd[2] == 0 && cmd->request_bufflen >= 8 + && cmd->cmnd[2] == 0 && scsi_bufflen(cmd) >= 8 && dir != PCI_DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2) dcb->inquiry7 = ptr->Flags; @@ -3527,14 +3486,12 @@ static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, } } - if (cmd->use_sg) { - scsi_kunmap_atomic_sg(base); - local_irq_restore(flags); - } + scsi_kunmap_atomic_sg(base); + local_irq_restore(flags); } /* Here is the info for Doug Gilbert's sg3 ... */ - cmd->resid = srb->total_xfer_length; + scsi_set_resid(cmd, srb->total_xfer_length); /* This may be interpreted by sb. or not ... */ cmd->SCp.this_residual = srb->total_xfer_length; cmd->SCp.buffers_residual = 0; |