Commit aadf20dc authored by Alan Cox's avatar Alan Cox Committed by Linus Torvalds

[PATCH] bring ide-disk driver into line with 2.4.21pre

This doesn't have the new -ac testing stuff from 2.4.21pre5-ac but it
has the stuff I now trust in it. This fixes the cache flush stuff and
also means ide-disk now should be safe shared IRQ
parent b6fed5fc
......@@ -38,9 +38,11 @@
* Version 1.15 convert all calls to ide_raw_taskfile
* since args will return register content.
* Version 1.16 added suspend-resume-checkpower
* Version 1.17 do flush on standy, do flush on ATA < ATA6
* fix wcache setup.
*/
#define IDEDISK_VERSION "1.16"
#define IDEDISK_VERSION "1.17"
#undef REALLY_SLOW_IO /* most systems can safely undef this */
......@@ -140,7 +142,7 @@ static int lba_capacity_is_ok (struct hd_driveid *id)
static ide_startstop_t read_intr (ide_drive_t *drive)
{
ide_hwif_t *hwif = HWIF(drive);
int i = 0, nsect = 0, msect = drive->mult_count;
u32 i = 0, nsect = 0, msect = drive->mult_count;
struct request *rq;
unsigned long flags;
u8 stat;
......@@ -203,7 +205,7 @@ static ide_startstop_t write_intr (ide_drive_t *drive)
ide_hwgroup_t *hwgroup = HWGROUP(drive);
ide_hwif_t *hwif = HWIF(drive);
struct request *rq = hwgroup->rq;
int i = 0;
u32 i = 0;
u8 stat;
if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),
......@@ -506,14 +508,10 @@ static ide_startstop_t do_rw_disk (ide_drive_t *drive, struct request *rq, secto
if (drive->using_dma && !hwif->ide_dma_read(drive))
return ide_started;
if (HWGROUP(drive)->handler != NULL)
BUG();
ide_set_handler(drive, &read_intr, WAIT_CMD, NULL);
command = ((drive->mult_count) ?
((lba48) ? WIN_MULTREAD_EXT : WIN_MULTREAD) :
((lba48) ? WIN_READ_EXT : WIN_READ));
hwif->OUTB(command, IDE_COMMAND_REG);
ide_execute_command(drive, command, &read_intr, WAIT_CMD, NULL);
return ide_started;
} else if (rq_data_dir(rq) == WRITE) {
ide_startstop_t startstop;
......@@ -628,11 +626,7 @@ static ide_startstop_t do_rw_disk (ide_drive_t *drive, struct request *rq, secto
static task_ioreg_t get_command (ide_drive_t *drive, int cmd)
{
int lba48bit = (drive->id->cfs_enable_2 & 0x0400) ? 1 : 0;
#if 1
lba48bit = (drive->addressing == 1) ? 1 : 0;
#endif
int lba48bit = (drive->addressing == 1) ? 1 : 0;
if ((cmd == READ) && drive->using_tcq)
return lba48bit ? WIN_READDMA_QUEUED_EXT : WIN_READDMA_QUEUED;
......@@ -1412,32 +1406,6 @@ static int do_idedisk_standby (ide_drive_t *drive)
return call_idedisk_standby(drive, 0);
}
#if 0
static int call_idedisk_checkpower (ide_drive_t *drive, int arg)
{
ide_task_t args;
u8 ckpw = (arg) ? WIN_CHECKPOWERMODE2 : WIN_CHECKPOWERMODE1;
memset(&args, 0, sizeof(ide_task_t));
args.tfRegister[IDE_COMMAND_OFFSET] = ckpw;
args.command_type = ide_cmd_type_parser(&args);
ide_raw_taskfile(drive, &args, NULL);
#if 0
if (errno != EIO || args[0] != 0 || args[1] != 0)
state = "unknown";
else
state = "sleeping";
} else {
state = (args[2] == 255) ? "active/idle" : "standby";
#endif
return 0;
}
static int do_idedisk_checkpower (ide_drive_t *drive)
{
return call_idedisk_checkpower(drive, 0);
}
#endif
static int do_idedisk_flushcache (ide_drive_t *drive)
{
ide_task_t args;
......@@ -1596,13 +1564,8 @@ static void idedisk_setup (ide_drive_t *drive)
drive->doorlocking = 1;
}
}
#if 1
(void) probe_lba_addressing(drive, 1);
#else
/* if using 48-bit addressing bump the request size up */
if (probe_lba_addressing(drive, 1))
blk_queue_max_sectors(&drive->queue, 2048);
#endif
/* Extract geometry if we did not already have one for the drive */
if (!drive->cyl || !drive->head || !drive->sect) {
......@@ -1675,13 +1638,9 @@ static void idedisk_setup (ide_drive_t *drive)
static int idedisk_cleanup (ide_drive_t *drive)
{
static int ide_cacheflush_p(ide_drive_t *drive);
struct gendisk *g = drive->disk;
do_idedisk_standby(drive);
if ((drive->id->cfs_enable_2 & 0x3000) && drive->wcache)
if (do_idedisk_flushcache(drive))
printk (KERN_INFO "%s: Write Cache FAILED Flushing!\n",
drive->name);
ide_cacheflush_p(drive);
if (ide_unregister_subdriver(drive))
return 1;
del_gendisk(g);
......@@ -1725,6 +1684,7 @@ static int idedisk_open(struct inode *inode, struct file *filp)
drive->usage++;
if (drive->removable && drive->usage == 1) {
ide_task_t args;
u8 cf;
memset(&args, 0, sizeof(ide_task_t));
args.tfRegister[IDE_COMMAND_OFFSET] = WIN_DOORLOCK;
args.command_type = ide_cmd_type_parser(&args);
......@@ -1736,6 +1696,32 @@ static int idedisk_open(struct inode *inode, struct file *filp)
*/
if (drive->doorlocking && ide_raw_taskfile(drive, &args, NULL))
drive->doorlocking = 0;
drive->wcache = 0;
/* Cache enabled ? */
if (drive->id->csfo & 1)
drive->wcache = 1;
/* Cache command set available ? */
if (drive->id->cfs_enable_1 & (1<<5))
drive->wcache = 1;
/* ATA6 cache extended commands */
cf = drive->id->command_set_2 >> 24;
if((cf & 0xC0) == 0x40 && (cf & 0x30) != 0)
drive->wcache = 1;
}
return 0;
}
static int ide_cacheflush_p(ide_drive_t *drive)
{
if(drive->wcache)
{
if (do_idedisk_flushcache(drive))
{
printk (KERN_INFO "%s: Write Cache FAILED Flushing!\n",
drive->name);
return -EIO;
}
return 1;
}
return 0;
}
......@@ -1752,10 +1738,7 @@ static int idedisk_release(struct inode *inode, struct file *filp)
if (drive->doorlocking && ide_raw_taskfile(drive, &args, NULL))
drive->doorlocking = 0;
}
if ((drive->id->cfs_enable_2 & 0x3000) && drive->wcache)
if (do_idedisk_flushcache(drive))
printk (KERN_INFO "%s: Write Cache FAILED Flushing!\n",
drive->name);
ide_cacheflush_p(drive);
drive->usage--;
return 0;
}
......
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