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SubjectRe: [PATCH] QStor SATA/RAID driver for 2.6.9-rc3
 >Seems sane, send a patch.

Here you go. This patch modifies libata-scsi for easier sharing
of the various ata_id_* functions and the ata_scsi_simulate()
function with non-libata drivers.

Signed-off-by: Mark Lord <mlord@pobox.com>
--
Mark Lord
(hdparm keeper & the original "Linux IDE Guy")
diff -u --recursive --new-file --exclude='.*' linux-2.6.9-rc4/drivers/scsi/libata-core.c linux/drivers/scsi/libata-core.c
--- linux-2.6.9-rc4/drivers/scsi/libata-core.c 2004-10-13 14:47:26.000000000 -0400
+++ linux/drivers/scsi/libata-core.c 2004-10-14 12:04:48.000000000 -0400
@@ -829,17 +829,17 @@
* caller.
*/

-void ata_dev_id_string(struct ata_device *dev, unsigned char *s,
+void ata_dev_id_string(u16 *id, unsigned char *s,
unsigned int ofs, unsigned int len)
{
unsigned int c;

while (len > 0) {
- c = dev->id[ofs] >> 8;
+ c = id[ofs] >> 8;
*s = c;
s++;

- c = dev->id[ofs] & 0xff;
+ c = id[ofs] & 0xff;
*s = c;
s++;

@@ -1082,7 +1082,7 @@
*/

/* we require LBA and DMA support (bits 8 & 9 of word 49) */
- if (!ata_id_has_dma(dev) || !ata_id_has_lba(dev)) {
+ if (!ata_id_has_dma(dev->id) || !ata_id_has_lba(dev->id)) {
printk(KERN_DEBUG "ata%u: no dma/lba\n", ap->id);
goto err_out_nosup;
}
@@ -1100,7 +1100,7 @@

/* ATA-specific feature tests */
if (dev->class == ATA_DEV_ATA) {
- if (!ata_id_is_ata(dev)) /* sanity check */
+ if (!ata_id_is_ata(dev->id)) /* sanity check */
goto err_out_nosup;

tmp = dev->id[ATA_ID_MAJOR_VER];
@@ -1114,11 +1114,11 @@
goto err_out_nosup;
}

- if (ata_id_has_lba48(dev)) {
+ if (ata_id_has_lba48(dev->id)) {
dev->flags |= ATA_DFLAG_LBA48;
- dev->n_sectors = ata_id_u64(dev, 100);
+ dev->n_sectors = ata_id_u64(dev->id, 100);
} else {
- dev->n_sectors = ata_id_u32(dev, 60);
+ dev->n_sectors = ata_id_u32(dev->id, 60);
}

ap->host->max_cmd_len = 16;
@@ -1133,7 +1133,7 @@

/* ATAPI-specific feature tests */
else {
- if (ata_id_is_ata(dev)) /* sanity check */
+ if (ata_id_is_ata(dev->id)) /* sanity check */
goto err_out_nosup;

rc = atapi_cdb_len(dev->id);
diff -u --recursive --new-file --exclude='.*' linux-2.6.9-rc4/drivers/scsi/libata.h linux/drivers/scsi/libata.h
--- linux-2.6.9-rc4/drivers/scsi/libata.h 2004-10-13 14:47:26.000000000 -0400
+++ linux/drivers/scsi/libata.h 2004-10-14 11:48:35.000000000 -0400
@@ -29,9 +29,8 @@
#define DRV_VERSION "1.02" /* must be exactly four chars */

struct ata_scsi_args {
- struct ata_port *ap;
- struct ata_device *dev;
- struct scsi_cmnd *cmd;
+ u16 *id;
+ struct scsi_cmnd *cmd;
void (*done)(struct scsi_cmnd *);
};

diff -u --recursive --new-file --exclude='.*' linux-2.6.9-rc4/drivers/scsi/libata-scsi.c linux/drivers/scsi/libata-scsi.c
--- linux-2.6.9-rc4/drivers/scsi/libata-scsi.c 2004-10-13 14:47:26.000000000 -0400
+++ linux/drivers/scsi/libata-scsi.c 2004-10-14 12:06:49.000000000 -0400
@@ -34,7 +34,7 @@
#include "libata.h"

typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc, u8 *scsicmd);
-static void ata_scsi_simulate(struct ata_port *ap, struct ata_device *dev,
+static void ata_scsi_simulate(u16 *id,
struct scsi_cmnd *cmd,
void (*done)(struct scsi_cmnd *));
static struct ata_device *
@@ -411,7 +411,7 @@
tf->protocol = ATA_PROT_NODATA;

if ((tf->flags & ATA_TFLAG_LBA48) &&
- (ata_id_has_flush_ext(qc->dev)))
+ (ata_id_has_flush_ext(qc->dev->id)))
tf->command = ATA_CMD_FLUSH_EXT;
else
tf->command = ATA_CMD_FLUSH;
@@ -758,7 +758,7 @@

/**
* ata_scsi_rbuf_fill - wrapper for SCSI command simulators
- * @args: Port / device / SCSI command of interest.
+ * @args: device IDENTIFY data / SCSI command of interest.
* @actor: Callback hook for desired SCSI command simulator
*
* Takes care of the hard work of simulating a SCSI command...
@@ -793,7 +793,7 @@

/**
* ata_scsiop_inq_std - Simulate INQUIRY command
- * @args: Port / device / SCSI command of interest.
+ * @args: device IDENTIFY data / SCSI command of interest.
* @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
* @buflen: Response buffer length.
*
@@ -807,8 +807,6 @@
unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
unsigned int buflen)
{
- struct ata_device *dev = args->dev;
-
u8 hdr[] = {
TYPE_DISK,
0,
@@ -818,7 +816,7 @@
};

/* set scsi removeable (RMB) bit per ata bit */
- if (ata_id_removeable(dev))
+ if (ata_id_removeable(args->id))
hdr[1] |= (1 << 7);

VPRINTK("ENTER\n");
@@ -827,8 +825,8 @@

if (buflen > 35) {
memcpy(&rbuf[8], "ATA ", 8);
- ata_dev_id_string(dev, &rbuf[16], ATA_ID_PROD_OFS, 16);
- ata_dev_id_string(dev, &rbuf[32], ATA_ID_FW_REV_OFS, 4);
+ ata_dev_id_string(args->id, &rbuf[16], ATA_ID_PROD_OFS, 16);
+ ata_dev_id_string(args->id, &rbuf[32], ATA_ID_FW_REV_OFS, 4);
if (rbuf[32] == 0 || rbuf[32] == ' ')
memcpy(&rbuf[32], "n/a ", 4);
}
@@ -852,7 +850,7 @@

/**
* ata_scsiop_inq_00 - Simulate INQUIRY EVPD page 0, list of pages
- * @args: Port / device / SCSI command of interest.
+ * @args: device IDENTIFY data / SCSI command of interest.
* @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
* @buflen: Response buffer length.
*
@@ -880,7 +878,7 @@

/**
* ata_scsiop_inq_80 - Simulate INQUIRY EVPD page 80, device serial number
- * @args: Port / device / SCSI command of interest.
+ * @args: device IDENTIFY data / SCSI command of interest.
* @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
* @buflen: Response buffer length.
*
@@ -902,7 +900,7 @@
memcpy(rbuf, hdr, sizeof(hdr));

if (buflen > (ATA_SERNO_LEN + 4))
- ata_dev_id_string(args->dev, (unsigned char *) &rbuf[4],
+ ata_dev_id_string(args->id, (unsigned char *) &rbuf[4],
ATA_ID_SERNO_OFS, ATA_SERNO_LEN);

return 0;
@@ -912,7 +910,7 @@

/**
* ata_scsiop_inq_83 - Simulate INQUIRY EVPD page 83, device identity
- * @args: Port / device / SCSI command of interest.
+ * @args: device IDENTIFY data / SCSI command of interest.
* @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
* @buflen: Response buffer length.
*
@@ -941,7 +939,7 @@

/**
* ata_scsiop_noop -
- * @args: Port / device / SCSI command of interest.
+ * @args: device IDENTIFY data / SCSI command of interest.
* @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
* @buflen: Response buffer length.
*
@@ -989,7 +987,7 @@

/**
* ata_msense_caching - Simulate MODE SENSE caching info page
- * @dev: Device associated with this MODE SENSE command
+ * @id: device IDENTIFY data
* @ptr_io: (input/output) Location to store more output data
* @last: End of output data buffer
*
@@ -1001,7 +999,7 @@
* None.
*/

-static unsigned int ata_msense_caching(struct ata_device *dev, u8 **ptr_io,
+static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
const u8 *last)
{
u8 page[] = {
@@ -1011,9 +1009,9 @@
0, 0, 0, 0, 0, 0, 0, 0 /* 8 zeroes */
};

- if (ata_id_wcache_enabled(dev))
+ if (ata_id_wcache_enabled(id))
page[2] |= (1 << 2); /* write cache enable */
- if (!ata_id_rahead_enabled(dev))
+ if (!ata_id_rahead_enabled(id))
page[12] |= (1 << 5); /* disable read ahead */

ata_msense_push(ptr_io, last, page, sizeof(page));
@@ -1067,7 +1065,7 @@

/**
* ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
- * @args: Port / device / SCSI command of interest.
+ * @args: device IDENTIFY data / SCSI command of interest.
* @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
* @buflen: Response buffer length.
*
@@ -1081,7 +1079,6 @@
unsigned int buflen)
{
u8 *scsicmd = args->cmd->cmnd, *p, *last;
- struct ata_device *dev = args->dev;
unsigned int page_control, six_byte, output_len;

VPRINTK("ENTER\n");
@@ -1109,7 +1106,7 @@
break;

case 0x08: /* caching */
- output_len += ata_msense_caching(dev, &p, last);
+ output_len += ata_msense_caching(args->id, &p, last);
break;

case 0x0a: { /* control mode */
@@ -1119,7 +1116,7 @@

case 0x3f: /* all pages */
output_len += ata_msense_rw_recovery(&p, last);
- output_len += ata_msense_caching(dev, &p, last);
+ output_len += ata_msense_caching(args->id, &p, last);
output_len += ata_msense_ctl_mode(&p, last);
break;

@@ -1141,7 +1138,7 @@

/**
* ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
- * @args: Port / device / SCSI command of interest.
+ * @args: device IDENTIFY data / SCSI command of interest.
* @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
* @buflen: Response buffer length.
*
@@ -1154,11 +1151,15 @@
unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
unsigned int buflen)
{
- u64 n_sectors = args->dev->n_sectors;
+ u64 n_sectors;
u32 tmp;

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);
n_sectors--; /* ATA TotalUserSectors - 1 */

tmp = n_sectors; /* note: truncates, if lba48 */
@@ -1196,7 +1197,7 @@

/**
* ata_scsiop_report_luns - Simulate REPORT LUNS command
- * @args: Port / device / SCSI command of interest.
+ * @args: device IDENTIFY data / SCSI command of interest.
* @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
* @buflen: Response buffer length.
*
@@ -1472,7 +1473,7 @@
if (xlat_func)
ata_scsi_translate(ap, dev, cmd, done, xlat_func);
else
- ata_scsi_simulate(ap, dev, cmd, done);
+ ata_scsi_simulate(dev->id, cmd, done);
} else
ata_scsi_translate(ap, dev, cmd, done, atapi_xlat);

@@ -1482,8 +1483,7 @@

/**
* ata_scsi_simulate - simulate SCSI command on ATA device
- * @ap: Port to which ATA device is attached.
- * @dev: Target device for CDB.
+ * @id: current IDENTIFY data for target device.
* @cmd: SCSI command being sent to device.
* @done: SCSI command completion function.
*
@@ -1494,15 +1494,14 @@
* spin_lock_irqsave(host_set lock)
*/

-static void ata_scsi_simulate(struct ata_port *ap, struct ata_device *dev,
+static void ata_scsi_simulate(u16 *id,
struct scsi_cmnd *cmd,
void (*done)(struct scsi_cmnd *))
{
struct ata_scsi_args args;
u8 *scsicmd = cmd->cmnd;

- args.ap = ap;
- args.dev = dev;
+ args.id = id;
args.cmd = cmd;
args.done = done;

diff -u --recursive --new-file --exclude='.*' linux-2.6.9-rc4/drivers/scsi/sata_sil.c linux/drivers/scsi/sata_sil.c
--- linux-2.6.9-rc4/drivers/scsi/sata_sil.c 2004-10-13 14:47:26.000000000 -0400
+++ linux/drivers/scsi/sata_sil.c 2004-10-14 12:05:23.000000000 -0400
@@ -287,7 +287,7 @@
const char *s;
unsigned int len;

- ata_dev_id_string(dev, model_num, ATA_ID_PROD_OFS,
+ ata_dev_id_string(dev->id, model_num, ATA_ID_PROD_OFS,
sizeof(model_num));
s = &model_num[0];
len = strnlen(s, sizeof(model_num));
diff -u --recursive --new-file --exclude='.*' linux-2.6.9-rc4/include/linux/ata.h linux/include/linux/ata.h
--- linux-2.6.9-rc4/include/linux/ata.h 2004-10-13 14:47:31.000000000 -0400
+++ linux/include/linux/ata.h 2004-10-14 11:51:26.000000000 -0400
@@ -217,24 +217,24 @@
u8 command; /* IO operation */
};

-#define ata_id_is_ata(dev) (((dev)->id[0] & (1 << 15)) == 0)
-#define ata_id_rahead_enabled(dev) ((dev)->id[85] & (1 << 6))
-#define ata_id_wcache_enabled(dev) ((dev)->id[85] & (1 << 5))
-#define ata_id_has_flush(dev) ((dev)->id[83] & (1 << 12))
-#define ata_id_has_flush_ext(dev) ((dev)->id[83] & (1 << 13))
-#define ata_id_has_lba48(dev) ((dev)->id[83] & (1 << 10))
-#define ata_id_has_wcache(dev) ((dev)->id[82] & (1 << 5))
-#define ata_id_has_pm(dev) ((dev)->id[82] & (1 << 3))
-#define ata_id_has_lba(dev) ((dev)->id[49] & (1 << 9))
-#define ata_id_has_dma(dev) ((dev)->id[49] & (1 << 8))
-#define ata_id_removeable(dev) ((dev)->id[0] & (1 << 7))
-#define ata_id_u32(dev,n) \
- (((u32) (dev)->id[(n) + 1] << 16) | ((u32) (dev)->id[(n)]))
-#define ata_id_u64(dev,n) \
- ( ((u64) dev->id[(n) + 3] << 48) | \
- ((u64) dev->id[(n) + 2] << 32) | \
- ((u64) dev->id[(n) + 1] << 16) | \
- ((u64) dev->id[(n) + 0]) )
+#define ata_id_is_ata(id) (((id)[0] & (1 << 15)) == 0)
+#define ata_id_rahead_enabled(id) ((id)[85] & (1 << 6))
+#define ata_id_wcache_enabled(id) ((id)[85] & (1 << 5))
+#define ata_id_has_flush(id) ((id)[83] & (1 << 12))
+#define ata_id_has_flush_ext(id) ((id)[83] & (1 << 13))
+#define ata_id_has_lba48(id) ((id)[83] & (1 << 10))
+#define ata_id_has_wcache(id) ((id)[82] & (1 << 5))
+#define ata_id_has_pm(id) ((id)[82] & (1 << 3))
+#define ata_id_has_lba(id) ((id)[49] & (1 << 9))
+#define ata_id_has_dma(id) ((id)[49] & (1 << 8))
+#define ata_id_removeable(id) ((id)[0] & (1 << 7))
+#define ata_id_u32(id,n) \
+ (((u32) (id)[(n) + 1] << 16) | ((u32) (id)[(n)]))
+#define ata_id_u64(id,n) \
+ ( ((u64) (id)[(n) + 3] << 48) | \
+ ((u64) (id)[(n) + 2] << 32) | \
+ ((u64) (id)[(n) + 1] << 16) | \
+ ((u64) (id)[(n) + 0]) )

static inline int atapi_cdb_len(u16 *dev_id)
{
diff -u --recursive --new-file --exclude='.*' linux-2.6.9-rc4/include/linux/libata.h linux/include/linux/libata.h
--- linux-2.6.9-rc4/include/linux/libata.h 2004-10-13 14:47:31.000000000 -0400
+++ linux/include/linux/libata.h 2004-10-14 12:05:52.000000000 -0400
@@ -403,7 +403,7 @@
extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
unsigned int n_elem);
extern unsigned int ata_dev_classify(struct ata_taskfile *tf);
-extern void ata_dev_id_string(struct ata_device *dev, unsigned char *s,
+extern void ata_dev_id_string(u16 *id, unsigned char *s,
unsigned int ofs, unsigned int len);
extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
extern void ata_bmdma_start (struct ata_queued_cmd *qc);
@@ -613,9 +613,9 @@

static inline int ata_try_flush_cache(struct ata_device *dev)
{
- return ata_id_wcache_enabled(dev) ||
- ata_id_has_flush(dev) ||
- ata_id_has_flush_ext(dev);
+ return ata_id_wcache_enabled(dev->id) ||
+ ata_id_has_flush(dev->id) ||
+ ata_id_has_flush_ext(dev->id);
}

#endif /* __LINUX_LIBATA_H__ */
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