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]) {
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:
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");
*/
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" */
args->done(cmd);
}
+/**
+ * ATA_SCSI_RBUF_SET - helper to set values in SCSI response buffer
+ * @idx: byte index into SCSI response buffer
+ * @val: value to set
+ *
+ * To be used by SCSI command simulator functions. This macros
+ * expects two local variables, u8 *rbuf and unsigned int buflen,
+ * are in scope.
+ *
+ * LOCKING:
+ * None.
+ */
+#define ATA_SCSI_RBUF_SET(idx, val) do { \
+ if ((idx) < buflen) rbuf[(idx)] = (u8)(val); \
+ } while (0)
+
/**
* ata_scsiop_inq_std - Simulate INQUIRY command
* @args: device IDENTIFY data / SCSI command of interest.
* Simulate READ CAPACITY commands.
*
* LOCKING:
- * spin_lock_irqsave(host lock)
+ * None.
*/
-
unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
unsigned int buflen)
{
- u64 n_sectors;
- u32 tmp;
+ u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */
VPRINTK("ENTER\n");
- if (ata_id_has_lba(args->id)) {
- if (ata_id_has_lba48(args->id))
- n_sectors = ata_id_u64(args->id, 100);
- else
- n_sectors = ata_id_u32(args->id, 60);
- } else {
- /* CHS default translation */
- n_sectors = args->id[1] * args->id[3] * args->id[6];
-
- if (ata_id_current_chs_valid(args->id))
- /* CHS current translation */
- n_sectors = ata_id_u32(args->id, 57);
- }
-
- n_sectors--; /* ATA TotalUserSectors - 1 */
-
if (args->cmd->cmnd[0] == READ_CAPACITY) {
- if( n_sectors >= 0xffffffffULL )
- tmp = 0xffffffff ; /* Return max count on overflow */
- else
- tmp = n_sectors ;
+ if (last_lba >= 0xffffffffULL)
+ last_lba = 0xffffffff;
/* sector count, 32-bit */
- rbuf[0] = tmp >> (8 * 3);
- rbuf[1] = tmp >> (8 * 2);
- rbuf[2] = tmp >> (8 * 1);
- rbuf[3] = tmp;
+ ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 3));
+ ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 2));
+ ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 1));
+ ATA_SCSI_RBUF_SET(3, last_lba);
/* sector size */
- tmp = ATA_SECT_SIZE;
- rbuf[6] = tmp >> 8;
- rbuf[7] = tmp;
-
+ ATA_SCSI_RBUF_SET(6, ATA_SECT_SIZE >> 8);
+ ATA_SCSI_RBUF_SET(7, ATA_SECT_SIZE);
} else {
/* sector count, 64-bit */
- tmp = n_sectors >> (8 * 4);
- rbuf[2] = tmp >> (8 * 3);
- rbuf[3] = tmp >> (8 * 2);
- rbuf[4] = tmp >> (8 * 1);
- rbuf[5] = tmp;
- tmp = n_sectors;
- rbuf[6] = tmp >> (8 * 3);
- rbuf[7] = tmp >> (8 * 2);
- rbuf[8] = tmp >> (8 * 1);
- rbuf[9] = tmp;
+ ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 7));
+ ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 6));
+ ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 5));
+ ATA_SCSI_RBUF_SET(3, last_lba >> (8 * 4));
+ ATA_SCSI_RBUF_SET(4, last_lba >> (8 * 3));
+ ATA_SCSI_RBUF_SET(5, last_lba >> (8 * 2));
+ ATA_SCSI_RBUF_SET(6, last_lba >> (8 * 1));
+ ATA_SCSI_RBUF_SET(7, last_lba);
/* sector size */
- tmp = ATA_SECT_SIZE;
- rbuf[12] = tmp >> 8;
- rbuf[13] = tmp;
+ ATA_SCSI_RBUF_SET(10, ATA_SECT_SIZE >> 8);
+ ATA_SCSI_RBUF_SET(11, ATA_SECT_SIZE);
}
return 0;
void ata_scsi_dev_rescan(void *data)
{
struct ata_port *ap = data;
- struct ata_device *dev;
+ unsigned long flags;
unsigned int i;
+ spin_lock_irqsave(ap->lock, flags);
+
for (i = 0; i < ATA_MAX_DEVICES; i++) {
- dev = &ap->device[i];
+ struct ata_device *dev = &ap->device[i];
+ struct scsi_device *sdev = dev->sdev;
- if (ata_dev_enabled(dev) && dev->sdev)
- scsi_rescan_device(&(dev->sdev->sdev_gendev));
+ if (!ata_dev_enabled(dev) || !sdev)
+ continue;
+ if (scsi_device_get(sdev))
+ continue;
+
+ spin_unlock_irqrestore(ap->lock, flags);
+ scsi_rescan_device(&(sdev->sdev_gendev));
+ scsi_device_put(sdev);
+ spin_lock_irqsave(ap->lock, flags);
}
+
+ spin_unlock_irqrestore(ap->lock, flags);
}
/**
git.samba.org / sfrench / cifs-2.6.git / blobdiff