/*
- libata-scsi.c - helper library for ATA
-
- Copyright 2003-2004 Red Hat, Inc. All rights reserved.
- Copyright 2003-2004 Jeff Garzik
-
- The contents of this file are subject to the Open
- Software License version 1.1 that can be found at
- http://www.opensource.org/licenses/osl-1.1.txt and is included herein
- by reference.
-
- Alternatively, the contents of this file may be used under the terms
- of the GNU General Public License version 2 (the "GPL") as distributed
- in the kernel source COPYING file, in which case the provisions of
- the GPL are applicable instead of the above. If you wish to allow
- the use of your version of this file only under the terms of the
- GPL and not to allow others to use your version of this file under
- the OSL, indicate your decision by deleting the provisions above and
- replace them with the notice and other provisions required by the GPL.
- If you do not delete the provisions above, a recipient may use your
- version of this file under either the OSL or the GPL.
-
+ * libata-scsi.c - helper library for ATA
+ *
+ * Maintained by: Jeff Garzik <jgarzik@pobox.com>
+ * Please ALWAYS copy linux-ide@vger.kernel.org
+ * on emails.
+ *
+ * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
+ * Copyright 2003-2004 Jeff Garzik
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING. If not, write to
+ * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *
+ * libata documentation is available via 'make {ps|pdf}docs',
+ * as Documentation/DocBook/libata.*
+ *
+ * Hardware documentation available from
+ * - http://www.t10.org/
+ * - http://www.t13.org/
+ *
*/
#include <linux/kernel.h>
static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, u8 *scsicmd)
{
struct ata_taskfile *tf = &qc->tf;
+ struct ata_device *dev = qc->dev;
+ unsigned int lba = tf->flags & ATA_TFLAG_LBA;
unsigned int lba48 = tf->flags & ATA_TFLAG_LBA48;
u64 dev_sectors = qc->dev->n_sectors;
- u64 sect = 0;
- u32 n_sect = 0;
+ u64 block = 0;
+ u32 n_block = 0;
tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
tf->protocol = ATA_PROT_NODATA;
- tf->device |= ATA_LBA;
if (scsicmd[0] == VERIFY) {
- sect |= ((u64)scsicmd[2]) << 24;
- sect |= ((u64)scsicmd[3]) << 16;
- sect |= ((u64)scsicmd[4]) << 8;
- sect |= ((u64)scsicmd[5]);
+ block |= ((u64)scsicmd[2]) << 24;
+ block |= ((u64)scsicmd[3]) << 16;
+ block |= ((u64)scsicmd[4]) << 8;
+ block |= ((u64)scsicmd[5]);
- n_sect |= ((u32)scsicmd[7]) << 8;
- n_sect |= ((u32)scsicmd[8]);
+ n_block |= ((u32)scsicmd[7]) << 8;
+ n_block |= ((u32)scsicmd[8]);
}
else if (scsicmd[0] == VERIFY_16) {
- sect |= ((u64)scsicmd[2]) << 56;
- sect |= ((u64)scsicmd[3]) << 48;
- sect |= ((u64)scsicmd[4]) << 40;
- sect |= ((u64)scsicmd[5]) << 32;
- sect |= ((u64)scsicmd[6]) << 24;
- sect |= ((u64)scsicmd[7]) << 16;
- sect |= ((u64)scsicmd[8]) << 8;
- sect |= ((u64)scsicmd[9]);
-
- n_sect |= ((u32)scsicmd[10]) << 24;
- n_sect |= ((u32)scsicmd[11]) << 16;
- n_sect |= ((u32)scsicmd[12]) << 8;
- n_sect |= ((u32)scsicmd[13]);
+ block |= ((u64)scsicmd[2]) << 56;
+ block |= ((u64)scsicmd[3]) << 48;
+ block |= ((u64)scsicmd[4]) << 40;
+ block |= ((u64)scsicmd[5]) << 32;
+ block |= ((u64)scsicmd[6]) << 24;
+ block |= ((u64)scsicmd[7]) << 16;
+ block |= ((u64)scsicmd[8]) << 8;
+ block |= ((u64)scsicmd[9]);
+
+ n_block |= ((u32)scsicmd[10]) << 24;
+ n_block |= ((u32)scsicmd[11]) << 16;
+ n_block |= ((u32)scsicmd[12]) << 8;
+ n_block |= ((u32)scsicmd[13]);
}
else
return 1;
- if (!n_sect)
+ if (!n_block)
return 1;
- if (sect >= dev_sectors)
+ if (block >= dev_sectors)
return 1;
- if ((sect + n_sect) > dev_sectors)
+ if ((block + n_block) > dev_sectors)
return 1;
if (lba48) {
- if (n_sect > (64 * 1024))
+ if (n_block > (64 * 1024))
return 1;
} else {
- if (n_sect > 256)
+ if (n_block > 256)
return 1;
}
- if (lba48) {
- tf->command = ATA_CMD_VERIFY_EXT;
+ if (lba) {
+ if (lba48) {
+ tf->command = ATA_CMD_VERIFY_EXT;
- tf->hob_nsect = (n_sect >> 8) & 0xff;
+ tf->hob_nsect = (n_block >> 8) & 0xff;
- tf->hob_lbah = (sect >> 40) & 0xff;
- tf->hob_lbam = (sect >> 32) & 0xff;
- tf->hob_lbal = (sect >> 24) & 0xff;
- } else {
- tf->command = ATA_CMD_VERIFY;
+ tf->hob_lbah = (block >> 40) & 0xff;
+ tf->hob_lbam = (block >> 32) & 0xff;
+ tf->hob_lbal = (block >> 24) & 0xff;
+ } else {
+ tf->command = ATA_CMD_VERIFY;
- tf->device |= (sect >> 24) & 0xf;
- }
+ tf->device |= (block >> 24) & 0xf;
+ }
+
+ tf->nsect = n_block & 0xff;
- tf->nsect = n_sect & 0xff;
+ tf->lbah = (block >> 16) & 0xff;
+ tf->lbam = (block >> 8) & 0xff;
+ tf->lbal = block & 0xff;
- tf->lbah = (sect >> 16) & 0xff;
- tf->lbam = (sect >> 8) & 0xff;
- tf->lbal = sect & 0xff;
+ tf->device |= ATA_LBA;
+ } else {
+ /* CHS */
+ u32 sect, head, cyl, track;
+
+ /* 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 1;
+
+ tf->command = ATA_CMD_VERIFY;
+ 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;
}
static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, u8 *scsicmd)
{
struct ata_taskfile *tf = &qc->tf;
+ struct ata_device *dev = qc->dev;
+ unsigned int lba = tf->flags & ATA_TFLAG_LBA;
unsigned int lba48 = tf->flags & ATA_TFLAG_LBA48;
+ u64 block = 0;
+ u32 n_block = 0;
tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
tf->protocol = qc->dev->xfer_protocol;
- tf->device |= ATA_LBA;
if (scsicmd[0] == READ_10 || scsicmd[0] == READ_6 ||
scsicmd[0] == READ_16) {
tf->flags |= ATA_TFLAG_WRITE;
}
+ /* Calculate the SCSI LBA and transfer length. */
if (scsicmd[0] == READ_10 || scsicmd[0] == WRITE_10) {
- if (lba48) {
- tf->hob_nsect = scsicmd[7];
- tf->hob_lbal = scsicmd[2];
-
- qc->nsect = ((unsigned int)scsicmd[7] << 8) |
- scsicmd[8];
- } else {
- /* if we don't support LBA48 addressing, the request
- * -may- be too large. */
- if ((scsicmd[2] & 0xf0) || scsicmd[7])
- return 1;
-
- /* stores LBA27:24 in lower 4 bits of device reg */
- tf->device |= scsicmd[2];
-
- qc->nsect = scsicmd[8];
- }
+ block |= ((u64)scsicmd[2]) << 24;
+ block |= ((u64)scsicmd[3]) << 16;
+ block |= ((u64)scsicmd[4]) << 8;
+ block |= ((u64)scsicmd[5]);
- tf->nsect = scsicmd[8];
- tf->lbal = scsicmd[5];
- tf->lbam = scsicmd[4];
- tf->lbah = scsicmd[3];
+ n_block |= ((u32)scsicmd[7]) << 8;
+ n_block |= ((u32)scsicmd[8]);
VPRINTK("ten-byte command\n");
- if (qc->nsect == 0) /* we don't support length==0 cmds */
- return 1;
- return 0;
- }
-
- if (scsicmd[0] == READ_6 || scsicmd[0] == WRITE_6) {
- qc->nsect = tf->nsect = scsicmd[4];
- if (!qc->nsect) {
- qc->nsect = 256;
- if (lba48)
- tf->hob_nsect = 1;
- }
-
- tf->lbal = scsicmd[3];
- tf->lbam = scsicmd[2];
- tf->lbah = scsicmd[1] & 0x1f; /* mask out reserved bits */
-
+ } else if (scsicmd[0] == READ_6 || scsicmd[0] == WRITE_6) {
+ block |= ((u64)scsicmd[2]) << 8;
+ block |= ((u64)scsicmd[3]);
+
+ n_block |= ((u32)scsicmd[4]);
+ if (!n_block)
+ n_block = 256;
+
VPRINTK("six-byte command\n");
- return 0;
+ } else if (scsicmd[0] == READ_16 || scsicmd[0] == WRITE_16) {
+ block |= ((u64)scsicmd[2]) << 56;
+ block |= ((u64)scsicmd[3]) << 48;
+ block |= ((u64)scsicmd[4]) << 40;
+ block |= ((u64)scsicmd[5]) << 32;
+ block |= ((u64)scsicmd[6]) << 24;
+ block |= ((u64)scsicmd[7]) << 16;
+ block |= ((u64)scsicmd[8]) << 8;
+ block |= ((u64)scsicmd[9]);
+
+ n_block |= ((u32)scsicmd[10]) << 24;
+ n_block |= ((u32)scsicmd[11]) << 16;
+ n_block |= ((u32)scsicmd[12]) << 8;
+ n_block |= ((u32)scsicmd[13]);
+
+ VPRINTK("sixteen-byte command\n");
+ } else {
+ DPRINTK("no-byte command\n");
+ return 1;
}
- if (scsicmd[0] == READ_16 || scsicmd[0] == WRITE_16) {
- /* rule out impossible LBAs and sector counts */
- if (scsicmd[2] || scsicmd[3] || scsicmd[10] || scsicmd[11])
- return 1;
+ /* Check and compose ATA command */
+ if (!n_block)
+ /* In ATA, sector count 0 means 256 or 65536 sectors, not 0 sectors. */
+ return 1;
+ if (lba) {
if (lba48) {
- tf->hob_nsect = scsicmd[12];
- tf->hob_lbal = scsicmd[6];
- tf->hob_lbam = scsicmd[5];
- tf->hob_lbah = scsicmd[4];
-
- qc->nsect = ((unsigned int)scsicmd[12] << 8) |
- scsicmd[13];
- } else {
- /* once again, filter out impossible non-zero values */
- if (scsicmd[4] || scsicmd[5] || scsicmd[12] ||
- (scsicmd[6] & 0xf0))
+ /* The request -may- be too large for LBA48. */
+ if ((block >> 48) || (n_block > 65536))
return 1;
- /* stores LBA27:24 in lower 4 bits of device reg */
- tf->device |= scsicmd[6];
+ 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 {
+ /* LBA28 */
+
+ /* The request -may- be too large for LBA28. */
+ if ((block >> 28) || (n_block > 256))
+ return 1;
- qc->nsect = scsicmd[13];
+ tf->device |= (block >> 24) & 0xf;
}
+
+ qc->nsect = n_block;
+ tf->nsect = n_block & 0xff;
- tf->nsect = scsicmd[13];
- tf->lbal = scsicmd[9];
- tf->lbam = scsicmd[8];
- tf->lbah = scsicmd[7];
+ tf->lbah = (block >> 16) & 0xff;
+ tf->lbam = (block >> 8) & 0xff;
+ tf->lbal = block & 0xff;
- VPRINTK("sixteen-byte command\n");
- if (qc->nsect == 0) /* we don't support length==0 cmds */
+ tf->device |= ATA_LBA;
+ } else {
+ /* CHS */
+ u32 sect, head, cyl, track;
+
+ /* The request -may- be too large for CHS addressing. */
+ if ((block >> 28) || (n_block > 256))
return 1;
- return 0;
+
+ /* 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 1;
+
+ 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;
}
- DPRINTK("no-byte command\n");
- return 1;
+ return 0;
}
static int ata_scsi_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat)
VPRINTK("ENTER\n");
- if (ata_id_has_lba48(args->id))
- n_sectors = ata_id_u64(args->id, 100);
- else
- n_sectors = ata_id_u32(args->id, 60);
+ 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) {
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