forked from luck/tmp_suning_uos_patched
[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 <htejun@gmail.com>
This commit is contained in:
Tejun Heo
parent
2432697ba0
commit
bd056d7eeb
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@ -199,7 +199,8 @@ static const u8 ata_rw_cmds[] = {
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/**
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* ata_rwcmd_protocol - set taskfile r/w commands and protocol
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* @qc: command to examine and configure
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* @tf: command to examine and configure
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* @dev: device tf belongs to
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*
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* Examine the device configuration and tf->flags to calculate
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* the proper read/write commands and protocol to use.
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@ -207,10 +208,8 @@ static const u8 ata_rw_cmds[] = {
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* LOCKING:
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* caller.
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*/
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int ata_rwcmd_protocol(struct ata_queued_cmd *qc)
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static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev)
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{
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struct ata_taskfile *tf = &qc->tf;
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struct ata_device *dev = qc->dev;
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u8 cmd;
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int index, fua, lba48, write;
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@ -222,7 +221,7 @@ int ata_rwcmd_protocol(struct ata_queued_cmd *qc)
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if (dev->flags & ATA_DFLAG_PIO) {
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tf->protocol = ATA_PROT_PIO;
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index = dev->multi_count ? 0 : 8;
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} else if (lba48 && (qc->ap->flags & ATA_FLAG_PIO_LBA48)) {
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} else if (lba48 && (dev->ap->flags & ATA_FLAG_PIO_LBA48)) {
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/* Unable to use DMA due to host limitation */
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tf->protocol = ATA_PROT_PIO;
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index = dev->multi_count ? 0 : 8;
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@ -282,6 +281,130 @@ u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev)
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return block;
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}
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/**
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* ata_build_rw_tf - Build ATA taskfile for given read/write request
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* @tf: Target ATA taskfile
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* @dev: ATA device @tf belongs to
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* @block: Block address
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* @n_block: Number of blocks
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* @tf_flags: RW/FUA etc...
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* @tag: tag
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*
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* LOCKING:
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* None.
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*
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* Build ATA taskfile @tf for read/write request described by
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* @block, @n_block, @tf_flags and @tag on @dev.
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*
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* RETURNS:
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*
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* 0 on success, -ERANGE if the request is too large for @dev,
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* -EINVAL if the request is invalid.
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*/
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int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
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u64 block, u32 n_block, unsigned int tf_flags,
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unsigned int tag)
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{
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tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
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tf->flags |= tf_flags;
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if ((dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
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ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ) {
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/* yay, NCQ */
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if (!lba_48_ok(block, n_block))
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return -ERANGE;
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tf->protocol = ATA_PROT_NCQ;
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tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
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if (tf->flags & ATA_TFLAG_WRITE)
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tf->command = ATA_CMD_FPDMA_WRITE;
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else
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tf->command = ATA_CMD_FPDMA_READ;
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tf->nsect = tag << 3;
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tf->hob_feature = (n_block >> 8) & 0xff;
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tf->feature = n_block & 0xff;
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tf->hob_lbah = (block >> 40) & 0xff;
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tf->hob_lbam = (block >> 32) & 0xff;
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tf->hob_lbal = (block >> 24) & 0xff;
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tf->lbah = (block >> 16) & 0xff;
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tf->lbam = (block >> 8) & 0xff;
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tf->lbal = block & 0xff;
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tf->device = 1 << 6;
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if (tf->flags & ATA_TFLAG_FUA)
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tf->device |= 1 << 7;
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} else if (dev->flags & ATA_DFLAG_LBA) {
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tf->flags |= ATA_TFLAG_LBA;
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if (lba_28_ok(block, n_block)) {
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/* use LBA28 */
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tf->device |= (block >> 24) & 0xf;
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} else if (lba_48_ok(block, n_block)) {
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if (!(dev->flags & ATA_DFLAG_LBA48))
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return -ERANGE;
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/* use LBA48 */
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tf->flags |= ATA_TFLAG_LBA48;
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tf->hob_nsect = (n_block >> 8) & 0xff;
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tf->hob_lbah = (block >> 40) & 0xff;
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tf->hob_lbam = (block >> 32) & 0xff;
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tf->hob_lbal = (block >> 24) & 0xff;
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} else
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/* request too large even for LBA48 */
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return -ERANGE;
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if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
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return -EINVAL;
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tf->nsect = n_block & 0xff;
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tf->lbah = (block >> 16) & 0xff;
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tf->lbam = (block >> 8) & 0xff;
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tf->lbal = block & 0xff;
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tf->device |= ATA_LBA;
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} else {
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/* CHS */
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u32 sect, head, cyl, track;
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/* The request -may- be too large for CHS addressing. */
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if (!lba_28_ok(block, n_block))
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return -ERANGE;
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if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
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return -EINVAL;
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/* Convert LBA to CHS */
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track = (u32)block / dev->sectors;
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cyl = track / dev->heads;
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head = track % dev->heads;
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sect = (u32)block % dev->sectors + 1;
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DPRINTK("block %u track %u cyl %u head %u sect %u\n",
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(u32)block, track, cyl, head, sect);
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/* Check whether the converted CHS can fit.
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Cylinder: 0-65535
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Head: 0-15
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Sector: 1-255*/
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if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
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return -ERANGE;
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tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
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tf->lbal = sect;
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tf->lbam = cyl;
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tf->lbah = cyl >> 8;
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tf->device |= head;
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}
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return 0;
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}
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/**
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* ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
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* @pio_mask: pio_mask
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@ -1265,17 +1265,14 @@ static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, const u8 *sc
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static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
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{
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struct ata_taskfile *tf = &qc->tf;
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struct ata_device *dev = qc->dev;
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unsigned int tf_flags = 0;
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u64 block;
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u32 n_block;
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qc->flags |= ATA_QCFLAG_IO;
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tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
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int rc;
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if (scsicmd[0] == WRITE_10 || scsicmd[0] == WRITE_6 ||
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scsicmd[0] == WRITE_16)
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tf->flags |= ATA_TFLAG_WRITE;
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tf_flags |= ATA_TFLAG_WRITE;
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/* Calculate the SCSI LBA, transfer length and FUA. */
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switch (scsicmd[0]) {
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@ -1283,7 +1280,7 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicm
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case WRITE_10:
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scsi_10_lba_len(scsicmd, &block, &n_block);
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if (unlikely(scsicmd[1] & (1 << 3)))
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tf->flags |= ATA_TFLAG_FUA;
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tf_flags |= ATA_TFLAG_FUA;
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break;
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case READ_6:
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case WRITE_6:
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@ -1299,7 +1296,7 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicm
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case WRITE_16:
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scsi_16_lba_len(scsicmd, &block, &n_block);
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if (unlikely(scsicmd[1] & (1 << 3)))
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tf->flags |= ATA_TFLAG_FUA;
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tf_flags |= ATA_TFLAG_FUA;
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break;
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default:
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DPRINTK("no-byte command\n");
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@ -1317,106 +1314,17 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicm
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*/
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goto nothing_to_do;
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if ((dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
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ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ) {
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/* yay, NCQ */
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if (!lba_48_ok(block, n_block))
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goto out_of_range;
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qc->flags |= ATA_QCFLAG_IO;
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qc->nsect = n_block;
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tf->protocol = ATA_PROT_NCQ;
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tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
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if (tf->flags & ATA_TFLAG_WRITE)
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tf->command = ATA_CMD_FPDMA_WRITE;
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else
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tf->command = ATA_CMD_FPDMA_READ;
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qc->nsect = n_block;
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tf->nsect = qc->tag << 3;
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tf->hob_feature = (n_block >> 8) & 0xff;
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tf->feature = n_block & 0xff;
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tf->hob_lbah = (block >> 40) & 0xff;
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tf->hob_lbam = (block >> 32) & 0xff;
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tf->hob_lbal = (block >> 24) & 0xff;
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tf->lbah = (block >> 16) & 0xff;
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tf->lbam = (block >> 8) & 0xff;
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tf->lbal = block & 0xff;
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tf->device = 1 << 6;
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if (tf->flags & ATA_TFLAG_FUA)
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tf->device |= 1 << 7;
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} else if (dev->flags & ATA_DFLAG_LBA) {
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tf->flags |= ATA_TFLAG_LBA;
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if (lba_28_ok(block, n_block)) {
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/* use LBA28 */
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tf->device |= (block >> 24) & 0xf;
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} else if (lba_48_ok(block, n_block)) {
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if (!(dev->flags & ATA_DFLAG_LBA48))
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goto out_of_range;
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/* use LBA48 */
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tf->flags |= ATA_TFLAG_LBA48;
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tf->hob_nsect = (n_block >> 8) & 0xff;
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tf->hob_lbah = (block >> 40) & 0xff;
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tf->hob_lbam = (block >> 32) & 0xff;
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tf->hob_lbal = (block >> 24) & 0xff;
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} else
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/* request too large even for LBA48 */
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goto out_of_range;
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if (unlikely(ata_rwcmd_protocol(qc) < 0))
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goto invalid_fld;
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qc->nsect = n_block;
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tf->nsect = n_block & 0xff;
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tf->lbah = (block >> 16) & 0xff;
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tf->lbam = (block >> 8) & 0xff;
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tf->lbal = block & 0xff;
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tf->device |= ATA_LBA;
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} else {
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/* CHS */
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u32 sect, head, cyl, track;
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/* The request -may- be too large for CHS addressing. */
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if (!lba_28_ok(block, n_block))
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goto out_of_range;
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if (unlikely(ata_rwcmd_protocol(qc) < 0))
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goto invalid_fld;
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/* Convert LBA to CHS */
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track = (u32)block / dev->sectors;
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cyl = track / dev->heads;
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head = track % dev->heads;
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sect = (u32)block % dev->sectors + 1;
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DPRINTK("block %u track %u cyl %u head %u sect %u\n",
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(u32)block, track, cyl, head, sect);
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/* Check whether the converted CHS can fit.
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Cylinder: 0-65535
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Head: 0-15
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Sector: 1-255*/
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if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
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goto out_of_range;
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qc->nsect = n_block;
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tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
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tf->lbal = sect;
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tf->lbam = cyl;
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tf->lbah = cyl >> 8;
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tf->device |= head;
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}
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return 0;
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rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
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qc->tag);
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if (likely(rc == 0))
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return 0;
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if (rc == -ERANGE)
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goto out_of_range;
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/* treat all other errors as -EINVAL, fall through */
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invalid_fld:
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ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
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/* "Invalid field in cbd" */
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@ -51,7 +51,9 @@ extern int atapi_enabled;
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extern int atapi_dmadir;
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extern int libata_fua;
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extern struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev);
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extern int ata_rwcmd_protocol(struct ata_queued_cmd *qc);
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extern int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
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u64 block, u32 n_block, unsigned int tf_flags,
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unsigned int tag);
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extern u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev);
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extern void ata_dev_disable(struct ata_device *dev);
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extern void ata_port_flush_task(struct ata_port *ap);
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