From bd056d7eeb55d696556ee4f5ee2acb67b2d16df4 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Tue, 14 Nov 2006 22:47:10 +0900 Subject: [PATCH] [PATCH] libata: separate out rw ATA taskfile building into ata_build_rw_tf() Separate out rw ATA taskfile building from ata_scsi_rw_xlat() into ata_build_rw_tf(). This will be used to improve media error handling. Signed-off-by: Tejun Heo --- drivers/ata/libata-core.c | 133 ++++++++++++++++++++++++++++++++++++-- drivers/ata/libata-scsi.c | 120 ++++------------------------------ drivers/ata/libata.h | 4 +- 3 files changed, 145 insertions(+), 112 deletions(-) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 0a5103b707c6..4ac53ef0e4b0 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -199,7 +199,8 @@ static const u8 ata_rw_cmds[] = { /** * ata_rwcmd_protocol - set taskfile r/w commands and protocol - * @qc: command to examine and configure + * @tf: command to examine and configure + * @dev: device tf belongs to * * Examine the device configuration and tf->flags to calculate * the proper read/write commands and protocol to use. @@ -207,10 +208,8 @@ static const u8 ata_rw_cmds[] = { * LOCKING: * caller. */ -int ata_rwcmd_protocol(struct ata_queued_cmd *qc) +static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev) { - struct ata_taskfile *tf = &qc->tf; - struct ata_device *dev = qc->dev; u8 cmd; int index, fua, lba48, write; @@ -222,7 +221,7 @@ int ata_rwcmd_protocol(struct ata_queued_cmd *qc) if (dev->flags & ATA_DFLAG_PIO) { tf->protocol = ATA_PROT_PIO; index = dev->multi_count ? 0 : 8; - } else if (lba48 && (qc->ap->flags & ATA_FLAG_PIO_LBA48)) { + } else if (lba48 && (dev->ap->flags & ATA_FLAG_PIO_LBA48)) { /* Unable to use DMA due to host limitation */ tf->protocol = ATA_PROT_PIO; index = dev->multi_count ? 0 : 8; @@ -282,6 +281,130 @@ u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev) return block; } +/** + * ata_build_rw_tf - Build ATA taskfile for given read/write request + * @tf: Target ATA taskfile + * @dev: ATA device @tf belongs to + * @block: Block address + * @n_block: Number of blocks + * @tf_flags: RW/FUA etc... + * @tag: tag + * + * LOCKING: + * None. + * + * Build ATA taskfile @tf for read/write request described by + * @block, @n_block, @tf_flags and @tag on @dev. + * + * RETURNS: + * + * 0 on success, -ERANGE if the request is too large for @dev, + * -EINVAL if the request is invalid. + */ +int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, + u64 block, u32 n_block, unsigned int tf_flags, + unsigned int tag) +{ + tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; + tf->flags |= tf_flags; + + if ((dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF | + ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ) { + /* yay, NCQ */ + if (!lba_48_ok(block, n_block)) + return -ERANGE; + + tf->protocol = ATA_PROT_NCQ; + tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; + + if (tf->flags & ATA_TFLAG_WRITE) + tf->command = ATA_CMD_FPDMA_WRITE; + else + tf->command = ATA_CMD_FPDMA_READ; + + tf->nsect = tag << 3; + tf->hob_feature = (n_block >> 8) & 0xff; + tf->feature = n_block & 0xff; + + tf->hob_lbah = (block >> 40) & 0xff; + tf->hob_lbam = (block >> 32) & 0xff; + tf->hob_lbal = (block >> 24) & 0xff; + tf->lbah = (block >> 16) & 0xff; + tf->lbam = (block >> 8) & 0xff; + tf->lbal = block & 0xff; + + tf->device = 1 << 6; + if (tf->flags & ATA_TFLAG_FUA) + tf->device |= 1 << 7; + } else if (dev->flags & ATA_DFLAG_LBA) { + tf->flags |= ATA_TFLAG_LBA; + + if (lba_28_ok(block, n_block)) { + /* use LBA28 */ + tf->device |= (block >> 24) & 0xf; + } else if (lba_48_ok(block, n_block)) { + if (!(dev->flags & ATA_DFLAG_LBA48)) + return -ERANGE; + + /* use LBA48 */ + tf->flags |= ATA_TFLAG_LBA48; + + tf->hob_nsect = (n_block >> 8) & 0xff; + + tf->hob_lbah = (block >> 40) & 0xff; + tf->hob_lbam = (block >> 32) & 0xff; + tf->hob_lbal = (block >> 24) & 0xff; + } else + /* request too large even for LBA48 */ + return -ERANGE; + + if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) + return -EINVAL; + + tf->nsect = n_block & 0xff; + + tf->lbah = (block >> 16) & 0xff; + tf->lbam = (block >> 8) & 0xff; + tf->lbal = block & 0xff; + + tf->device |= ATA_LBA; + } else { + /* CHS */ + u32 sect, head, cyl, track; + + /* The request -may- be too large for CHS addressing. */ + if (!lba_28_ok(block, n_block)) + return -ERANGE; + + if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) + return -EINVAL; + + /* Convert LBA to CHS */ + track = (u32)block / dev->sectors; + cyl = track / dev->heads; + head = track % dev->heads; + sect = (u32)block % dev->sectors + 1; + + DPRINTK("block %u track %u cyl %u head %u sect %u\n", + (u32)block, track, cyl, head, sect); + + /* Check whether the converted CHS can fit. + Cylinder: 0-65535 + Head: 0-15 + Sector: 1-255*/ + if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) + return -ERANGE; + + tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ + tf->lbal = sect; + tf->lbam = cyl; + tf->lbah = cyl >> 8; + tf->device |= head; + } + + return 0; +} + /** * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask * @pio_mask: pio_mask diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index d250858d201c..8eaace94d963 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -1265,17 +1265,14 @@ nothing_to_do: static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd) { - struct ata_taskfile *tf = &qc->tf; - struct ata_device *dev = qc->dev; + unsigned int tf_flags = 0; u64 block; u32 n_block; - - qc->flags |= ATA_QCFLAG_IO; - tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; + int rc; if (scsicmd[0] == WRITE_10 || scsicmd[0] == WRITE_6 || scsicmd[0] == WRITE_16) - tf->flags |= ATA_TFLAG_WRITE; + tf_flags |= ATA_TFLAG_WRITE; /* Calculate the SCSI LBA, transfer length and FUA. */ switch (scsicmd[0]) { @@ -1283,7 +1280,7 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicm case WRITE_10: scsi_10_lba_len(scsicmd, &block, &n_block); if (unlikely(scsicmd[1] & (1 << 3))) - tf->flags |= ATA_TFLAG_FUA; + tf_flags |= ATA_TFLAG_FUA; break; case READ_6: case WRITE_6: @@ -1299,7 +1296,7 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicm case WRITE_16: scsi_16_lba_len(scsicmd, &block, &n_block); if (unlikely(scsicmd[1] & (1 << 3))) - tf->flags |= ATA_TFLAG_FUA; + tf_flags |= ATA_TFLAG_FUA; break; default: DPRINTK("no-byte command\n"); @@ -1317,106 +1314,17 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicm */ goto nothing_to_do; - if ((dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF | - ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ) { - /* yay, NCQ */ - if (!lba_48_ok(block, n_block)) - goto out_of_range; - - tf->protocol = ATA_PROT_NCQ; - tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; - - if (tf->flags & ATA_TFLAG_WRITE) - tf->command = ATA_CMD_FPDMA_WRITE; - else - tf->command = ATA_CMD_FPDMA_READ; - - qc->nsect = n_block; - - tf->nsect = qc->tag << 3; - tf->hob_feature = (n_block >> 8) & 0xff; - tf->feature = n_block & 0xff; - - tf->hob_lbah = (block >> 40) & 0xff; - tf->hob_lbam = (block >> 32) & 0xff; - tf->hob_lbal = (block >> 24) & 0xff; - tf->lbah = (block >> 16) & 0xff; - tf->lbam = (block >> 8) & 0xff; - tf->lbal = block & 0xff; - - tf->device = 1 << 6; - if (tf->flags & ATA_TFLAG_FUA) - tf->device |= 1 << 7; - } else if (dev->flags & ATA_DFLAG_LBA) { - tf->flags |= ATA_TFLAG_LBA; - - if (lba_28_ok(block, n_block)) { - /* use LBA28 */ - tf->device |= (block >> 24) & 0xf; - } else if (lba_48_ok(block, n_block)) { - if (!(dev->flags & ATA_DFLAG_LBA48)) - goto out_of_range; - - /* use LBA48 */ - tf->flags |= ATA_TFLAG_LBA48; - - tf->hob_nsect = (n_block >> 8) & 0xff; - - tf->hob_lbah = (block >> 40) & 0xff; - tf->hob_lbam = (block >> 32) & 0xff; - tf->hob_lbal = (block >> 24) & 0xff; - } else - /* request too large even for LBA48 */ - goto out_of_range; - - if (unlikely(ata_rwcmd_protocol(qc) < 0)) - goto invalid_fld; - - qc->nsect = n_block; - tf->nsect = n_block & 0xff; - - tf->lbah = (block >> 16) & 0xff; - tf->lbam = (block >> 8) & 0xff; - tf->lbal = block & 0xff; - - tf->device |= ATA_LBA; - } else { - /* CHS */ - u32 sect, head, cyl, track; - - /* The request -may- be too large for CHS addressing. */ - if (!lba_28_ok(block, n_block)) - goto out_of_range; - - if (unlikely(ata_rwcmd_protocol(qc) < 0)) - goto invalid_fld; - - /* Convert LBA to CHS */ - track = (u32)block / dev->sectors; - cyl = track / dev->heads; - head = track % dev->heads; - sect = (u32)block % dev->sectors + 1; - - DPRINTK("block %u track %u cyl %u head %u sect %u\n", - (u32)block, track, cyl, head, sect); - - /* Check whether the converted CHS can fit. - Cylinder: 0-65535 - Head: 0-15 - Sector: 1-255*/ - if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) - goto out_of_range; - - qc->nsect = n_block; - tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ - tf->lbal = sect; - tf->lbam = cyl; - tf->lbah = cyl >> 8; - tf->device |= head; - } + qc->flags |= ATA_QCFLAG_IO; + qc->nsect = n_block; - return 0; + rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, + qc->tag); + if (likely(rc == 0)) + return 0; + if (rc == -ERANGE) + goto out_of_range; + /* treat all other errors as -EINVAL, fall through */ invalid_fld: ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0); /* "Invalid field in cbd" */ diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h index ca6f36c13115..60576b1237e4 100644 --- a/drivers/ata/libata.h +++ b/drivers/ata/libata.h @@ -51,7 +51,9 @@ extern int atapi_enabled; extern int atapi_dmadir; extern int libata_fua; extern struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev); -extern int ata_rwcmd_protocol(struct ata_queued_cmd *qc); +extern int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, + u64 block, u32 n_block, unsigned int tf_flags, + unsigned int tag); extern u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev); extern void ata_dev_disable(struct ata_device *dev); extern void ata_port_flush_task(struct ata_port *ap); -- 2.30.2