diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/ata/libata-core.c | 80 | ||||
| -rw-r--r-- | drivers/ata/libata-scsi.c | 2 | ||||
| -rw-r--r-- | drivers/ata/pata_cs5520.c | 4 | ||||
| -rw-r--r-- | drivers/ata/pata_cs5530.c | 4 | ||||
| -rw-r--r-- | drivers/ata/pata_sc1200.c | 4 |
5 files changed, 87 insertions, 7 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 74c4cd9..5b25311 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -4103,6 +4103,68 @@ static void ata_fill_sg(struct ata_queued_cmd *qc) } /** + * ata_fill_sg_dumb - Fill PCI IDE PRD table + * @qc: Metadata associated with taskfile to be transferred + * + * Fill PCI IDE PRD (scatter-gather) table with segments + * associated with the current disk command. Perform the fill + * so that we avoid writing any length 64K records for + * controllers that don't follow the spec. + * + * LOCKING: + * spin_lock_irqsave(host lock) + * + */ +static void ata_fill_sg_dumb(struct ata_queued_cmd *qc) +{ + struct ata_port *ap = qc->ap; + struct scatterlist *sg; + unsigned int idx; + + WARN_ON(qc->__sg == NULL); + WARN_ON(qc->n_elem == 0 && qc->pad_len == 0); + + idx = 0; + ata_for_each_sg(sg, qc) { + u32 addr, offset; + u32 sg_len, len, blen; + + /* determine if physical DMA addr spans 64K boundary. + * Note h/w doesn't support 64-bit, so we unconditionally + * truncate dma_addr_t to u32. + */ + addr = (u32) sg_dma_address(sg); + sg_len = sg_dma_len(sg); + + while (sg_len) { + offset = addr & 0xffff; + len = sg_len; + if ((offset + sg_len) > 0x10000) + len = 0x10000 - offset; + + blen = len & 0xffff; + ap->prd[idx].addr = cpu_to_le32(addr); + if (blen == 0) { + /* Some PATA chipsets like the CS5530 can't + cope with 0x0000 meaning 64K as the spec says */ + ap->prd[idx].flags_len = cpu_to_le32(0x8000); + blen = 0x8000; + ap->prd[++idx].addr = cpu_to_le32(addr + 0x8000); + } + ap->prd[idx].flags_len = cpu_to_le32(blen); + VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); + + idx++; + sg_len -= len; + addr += len; + } + } + + if (idx) + ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); +} + +/** * ata_check_atapi_dma - Check whether ATAPI DMA can be supported * @qc: Metadata associated with taskfile to check * @@ -4149,6 +4211,23 @@ void ata_qc_prep(struct ata_queued_cmd *qc) ata_fill_sg(qc); } +/** + * ata_dumb_qc_prep - Prepare taskfile for submission + * @qc: Metadata associated with taskfile to be prepared + * + * Prepare ATA taskfile for submission. + * + * LOCKING: + * spin_lock_irqsave(host lock) + */ +void ata_dumb_qc_prep(struct ata_queued_cmd *qc) +{ + if (!(qc->flags & ATA_QCFLAG_DMAMAP)) + return; + + ata_fill_sg_dumb(qc); +} + void ata_noop_qc_prep(struct ata_queued_cmd *qc) { } /** @@ -6821,6 +6900,7 @@ EXPORT_SYMBOL_GPL(ata_do_set_mode); EXPORT_SYMBOL_GPL(ata_data_xfer); EXPORT_SYMBOL_GPL(ata_data_xfer_noirq); EXPORT_SYMBOL_GPL(ata_qc_prep); +EXPORT_SYMBOL_GPL(ata_dumb_qc_prep); EXPORT_SYMBOL_GPL(ata_noop_qc_prep); EXPORT_SYMBOL_GPL(ata_bmdma_setup); EXPORT_SYMBOL_GPL(ata_bmdma_start); diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 4ddf00c..cfde22d 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -2620,7 +2620,7 @@ static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) ata_dev_printk(dev, KERN_WARNING, "invalid multi_count %u ignored\n", multi_count); - } + } /* READ/WRITE LONG use a non-standard sect_size */ qc->sect_size = ATA_SECT_SIZE; diff --git a/drivers/ata/pata_cs5520.c b/drivers/ata/pata_cs5520.c index 00cf013..6bf037d 100644 --- a/drivers/ata/pata_cs5520.c +++ b/drivers/ata/pata_cs5520.c @@ -146,7 +146,7 @@ static struct scsi_host_template cs5520_sht = { .queuecommand = ata_scsi_queuecmd, .can_queue = ATA_DEF_QUEUE, .this_id = ATA_SHT_THIS_ID, - .sg_tablesize = LIBATA_MAX_PRD, + .sg_tablesize = LIBATA_DUMB_MAX_PRD, .cmd_per_lun = ATA_SHT_CMD_PER_LUN, .emulated = ATA_SHT_EMULATED, .use_clustering = ATA_SHT_USE_CLUSTERING, @@ -178,7 +178,7 @@ static struct ata_port_operations cs5520_port_ops = { .bmdma_start = ata_bmdma_start, .bmdma_stop = ata_bmdma_stop, .bmdma_status = ata_bmdma_status, - .qc_prep = ata_qc_prep, + .qc_prep = ata_dumb_qc_prep, .qc_issue = ata_qc_issue_prot, .data_xfer = ata_data_xfer, diff --git a/drivers/ata/pata_cs5530.c b/drivers/ata/pata_cs5530.c index 797a6f6..3fca589 100644 --- a/drivers/ata/pata_cs5530.c +++ b/drivers/ata/pata_cs5530.c @@ -167,7 +167,7 @@ static struct scsi_host_template cs5530_sht = { .queuecommand = ata_scsi_queuecmd, .can_queue = ATA_DEF_QUEUE, .this_id = ATA_SHT_THIS_ID, - .sg_tablesize = LIBATA_MAX_PRD, + .sg_tablesize = LIBATA_DUMB_MAX_PRD, .cmd_per_lun = ATA_SHT_CMD_PER_LUN, .emulated = ATA_SHT_EMULATED, .use_clustering = ATA_SHT_USE_CLUSTERING, @@ -201,7 +201,7 @@ static struct ata_port_operations cs5530_port_ops = { .post_internal_cmd = ata_bmdma_post_internal_cmd, .cable_detect = ata_cable_40wire, - .qc_prep = ata_qc_prep, + .qc_prep = ata_dumb_qc_prep, .qc_issue = cs5530_qc_issue_prot, .data_xfer = ata_data_xfer, diff --git a/drivers/ata/pata_sc1200.c b/drivers/ata/pata_sc1200.c index 7ff39cf..b8b2d11 100644 --- a/drivers/ata/pata_sc1200.c +++ b/drivers/ata/pata_sc1200.c @@ -185,7 +185,7 @@ static struct scsi_host_template sc1200_sht = { .queuecommand = ata_scsi_queuecmd, .can_queue = ATA_DEF_QUEUE, .this_id = ATA_SHT_THIS_ID, - .sg_tablesize = LIBATA_MAX_PRD, + .sg_tablesize = LIBATA_DUMB_MAX_PRD, .cmd_per_lun = ATA_SHT_CMD_PER_LUN, .emulated = ATA_SHT_EMULATED, .use_clustering = ATA_SHT_USE_CLUSTERING, @@ -219,7 +219,7 @@ static struct ata_port_operations sc1200_port_ops = { .bmdma_stop = ata_bmdma_stop, .bmdma_status = ata_bmdma_status, - .qc_prep = ata_qc_prep, + .qc_prep = ata_dumb_qc_prep, .qc_issue = sc1200_qc_issue_prot, .data_xfer = ata_data_xfer, |
