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path: root/drivers/ide/ide-tape.c
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Diffstat (limited to 'drivers/ide/ide-tape.c')
-rw-r--r--drivers/ide/ide-tape.c166
1 files changed, 54 insertions, 112 deletions
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index f8c84df4a0b..d879c7797cd 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -172,23 +172,16 @@ typedef struct ide_tape_obj {
struct kref kref;
/*
- * pc points to the current processed packet command.
- *
* failed_pc points to the last failed packet command, or contains
* NULL if we do not need to retry any packet command. This is
* required since an additional packet command is needed before the
* retry, to get detailed information on what went wrong.
*/
- /* Current packet command */
- struct ide_atapi_pc *pc;
/* Last failed packet command */
struct ide_atapi_pc *failed_pc;
/* used by REQ_IDETAPE_{READ,WRITE} requests */
struct ide_atapi_pc queued_pc;
- struct ide_atapi_pc request_sense_pc;
- struct request request_sense_rq;
-
/*
* DSC polling variables.
*
@@ -274,11 +267,6 @@ static DEFINE_MUTEX(idetape_ref_mutex);
static struct class *idetape_sysfs_class;
-#define to_ide_tape(obj) container_of(obj, struct ide_tape_obj, kref)
-
-#define ide_tape_g(disk) \
- container_of((disk)->private_data, struct ide_tape_obj, driver)
-
static void ide_tape_release(struct kref *);
static struct ide_tape_obj *ide_tape_get(struct gendisk *disk)
@@ -286,7 +274,7 @@ static struct ide_tape_obj *ide_tape_get(struct gendisk *disk)
struct ide_tape_obj *tape = NULL;
mutex_lock(&idetape_ref_mutex);
- tape = ide_tape_g(disk);
+ tape = ide_drv_g(disk, ide_tape_obj);
if (tape) {
if (ide_device_get(tape->drive))
tape = NULL;
@@ -313,8 +301,6 @@ static void ide_tape_put(struct ide_tape_obj *tape)
*/
static struct ide_tape_obj *idetape_devs[MAX_HWIFS * MAX_DRIVES];
-#define ide_tape_f(file) ((file)->private_data)
-
static struct ide_tape_obj *ide_tape_chrdev_get(unsigned int i)
{
struct ide_tape_obj *tape = NULL;
@@ -522,14 +508,19 @@ static int idetape_end_request(ide_drive_t *drive, int uptodate, int nr_sects)
return 0;
}
-static void ide_tape_callback(ide_drive_t *drive)
+static void ide_tape_handle_dsc(ide_drive_t *);
+
+static void ide_tape_callback(ide_drive_t *drive, int dsc)
{
idetape_tape_t *tape = drive->driver_data;
- struct ide_atapi_pc *pc = tape->pc;
+ struct ide_atapi_pc *pc = drive->pc;
int uptodate = pc->error ? 0 : 1;
debug_log(DBG_PROCS, "Enter %s\n", __func__);
+ if (dsc)
+ ide_tape_handle_dsc(drive);
+
if (tape->failed_pc == pc)
tape->failed_pc = NULL;
@@ -558,7 +549,7 @@ static void ide_tape_callback(ide_drive_t *drive)
if (pc->error)
uptodate = pc->error;
} else if (pc->c[0] == READ_POSITION && uptodate) {
- u8 *readpos = tape->pc->buf;
+ u8 *readpos = pc->buf;
debug_log(DBG_SENSE, "BOP - %s\n",
(readpos[0] & 0x80) ? "Yes" : "No");
@@ -583,31 +574,6 @@ static void ide_tape_callback(ide_drive_t *drive)
idetape_end_request(drive, uptodate, 0);
}
-static void idetape_create_request_sense_cmd(struct ide_atapi_pc *pc)
-{
- ide_init_pc(pc);
- pc->c[0] = REQUEST_SENSE;
- pc->c[4] = 20;
- pc->req_xfer = 20;
-}
-
-/*
- * idetape_retry_pc is called when an error was detected during the
- * last packet command. We queue a request sense packet command in
- * the head of the request list.
- */
-static void idetape_retry_pc(ide_drive_t *drive)
-{
- struct ide_tape_obj *tape = drive->driver_data;
- struct request *rq = &tape->request_sense_rq;
- struct ide_atapi_pc *pc = &tape->request_sense_pc;
-
- (void)ide_read_error(drive);
- idetape_create_request_sense_cmd(pc);
- set_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags);
- ide_queue_pc_head(drive, tape->disk, pc, rq);
-}
-
/*
* Postpone the current request so that ide.c will be able to service requests
* from another device on the same hwgroup while we are polling for DSC.
@@ -646,34 +612,18 @@ static int ide_tape_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
}
/*
- * This is the usual interrupt handler which will be called during a packet
- * command. We will transfer some of the data (as requested by the drive) and
- * will re-point interrupt handler to us. When data transfer is finished, we
- * will act according to the algorithm described before
- * idetape_issue_pc.
- */
-static ide_startstop_t idetape_pc_intr(ide_drive_t *drive)
-{
- idetape_tape_t *tape = drive->driver_data;
-
- return ide_pc_intr(drive, tape->pc, idetape_pc_intr, WAIT_TAPE_CMD,
- NULL, idetape_update_buffers, idetape_retry_pc,
- ide_tape_handle_dsc, ide_tape_io_buffers);
-}
-
-/*
* Packet Command Interface
*
- * The current Packet Command is available in tape->pc, and will not change
+ * The current Packet Command is available in drive->pc, and will not change
* until we finish handling it. Each packet command is associated with a
* callback function that will be called when the command is finished.
*
* The handling will be done in three stages:
*
* 1. idetape_issue_pc will send the packet command to the drive, and will set
- * the interrupt handler to idetape_pc_intr.
+ * the interrupt handler to ide_pc_intr.
*
- * 2. On each interrupt, idetape_pc_intr will be called. This step will be
+ * 2. On each interrupt, ide_pc_intr will be called. This step will be
* repeated until the device signals us that no more interrupts will be issued.
*
* 3. ATAPI Tape media access commands have immediate status with a delayed
@@ -697,20 +647,13 @@ static ide_startstop_t idetape_pc_intr(ide_drive_t *drive)
* again, the callback function will be called and then we will handle the next
* request.
*/
-static ide_startstop_t idetape_transfer_pc(ide_drive_t *drive)
-{
- idetape_tape_t *tape = drive->driver_data;
-
- return ide_transfer_pc(drive, tape->pc, idetape_pc_intr,
- WAIT_TAPE_CMD, NULL);
-}
static ide_startstop_t idetape_issue_pc(ide_drive_t *drive,
struct ide_atapi_pc *pc)
{
idetape_tape_t *tape = drive->driver_data;
- if (tape->pc->c[0] == REQUEST_SENSE &&
+ if (drive->pc->c[0] == REQUEST_SENSE &&
pc->c[0] == REQUEST_SENSE) {
printk(KERN_ERR "ide-tape: possible ide-tape.c bug - "
"Two request sense in serial were issued\n");
@@ -718,8 +661,9 @@ static ide_startstop_t idetape_issue_pc(ide_drive_t *drive,
if (tape->failed_pc == NULL && pc->c[0] != REQUEST_SENSE)
tape->failed_pc = pc;
+
/* Set the current packet command */
- tape->pc = pc;
+ drive->pc = pc;
if (pc->retries > IDETAPE_MAX_PC_RETRIES ||
(pc->flags & PC_FLAG_ABORT)) {
@@ -743,15 +687,14 @@ static ide_startstop_t idetape_issue_pc(ide_drive_t *drive,
pc->error = IDETAPE_ERROR_GENERAL;
}
tape->failed_pc = NULL;
- drive->pc_callback(drive);
+ drive->pc_callback(drive, 0);
return ide_stopped;
}
debug_log(DBG_SENSE, "Retry #%d, cmd = %02X\n", pc->retries, pc->c[0]);
pc->retries++;
- return ide_issue_pc(drive, pc, idetape_transfer_pc,
- WAIT_TAPE_CMD, NULL);
+ return ide_issue_pc(drive, WAIT_TAPE_CMD, NULL);
}
/* A mode sense command is used to "sense" tape parameters. */
@@ -785,7 +728,7 @@ static ide_startstop_t idetape_media_access_finished(ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
idetape_tape_t *tape = drive->driver_data;
- struct ide_atapi_pc *pc = tape->pc;
+ struct ide_atapi_pc *pc = drive->pc;
u8 stat;
stat = hwif->tp_ops->read_status(hwif);
@@ -797,7 +740,7 @@ static ide_startstop_t idetape_media_access_finished(ide_drive_t *drive)
printk(KERN_ERR "ide-tape: %s: I/O error, ",
tape->name);
/* Retry operation */
- idetape_retry_pc(drive);
+ ide_retry_pc(drive, tape->disk);
return ide_stopped;
}
pc->error = 0;
@@ -805,7 +748,7 @@ static ide_startstop_t idetape_media_access_finished(ide_drive_t *drive)
pc->error = IDETAPE_ERROR_GENERAL;
tape->failed_pc = NULL;
}
- drive->pc_callback(drive);
+ drive->pc_callback(drive, 0);
return ide_stopped;
}
@@ -862,7 +805,7 @@ static ide_startstop_t idetape_do_request(ide_drive_t *drive,
}
/* Retry a failed packet command */
- if (tape->failed_pc && tape->pc->c[0] == REQUEST_SENSE) {
+ if (tape->failed_pc && drive->pc->c[0] == REQUEST_SENSE) {
pc = tape->failed_pc;
goto out;
}
@@ -883,12 +826,13 @@ static ide_startstop_t idetape_do_request(ide_drive_t *drive,
*/
stat = hwif->tp_ops->read_status(hwif);
- if (!drive->dsc_overlap && !(rq->cmd[13] & REQ_IDETAPE_PC2))
+ if ((drive->dev_flags & IDE_DFLAG_DSC_OVERLAP) == 0 &&
+ (rq->cmd[13] & REQ_IDETAPE_PC2) == 0)
set_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags);
- if (drive->post_reset == 1) {
+ if (drive->dev_flags & IDE_DFLAG_POST_RESET) {
set_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags);
- drive->post_reset = 0;
+ drive->dev_flags &= ~IDE_DFLAG_POST_RESET;
}
if (!test_and_clear_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags) &&
@@ -1411,7 +1355,7 @@ static int idetape_init_read(ide_drive_t *drive)
* No point in issuing this if DSC overlap isn't supported, some
* drives (Seagate STT3401A) will return an error.
*/
- if (drive->dsc_overlap) {
+ if (drive->dev_flags & IDE_DFLAG_DSC_OVERLAP) {
bytes_read = idetape_queue_rw_tail(drive,
REQ_IDETAPE_READ, 0,
tape->merge_bh);
@@ -1592,7 +1536,7 @@ static int idetape_space_over_filemarks(ide_drive_t *drive, short mt_op,
static ssize_t idetape_chrdev_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
- struct ide_tape_obj *tape = ide_tape_f(file);
+ struct ide_tape_obj *tape = file->private_data;
ide_drive_t *drive = tape->drive;
ssize_t bytes_read, temp, actually_read = 0, rc;
ssize_t ret = 0;
@@ -1654,7 +1598,7 @@ finish:
static ssize_t idetape_chrdev_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
- struct ide_tape_obj *tape = ide_tape_f(file);
+ struct ide_tape_obj *tape = file->private_data;
ide_drive_t *drive = tape->drive;
ssize_t actually_written = 0;
ssize_t ret = 0;
@@ -1687,7 +1631,7 @@ static ssize_t idetape_chrdev_write(struct file *file, const char __user *buf,
* point in issuing this if DSC overlap isn't supported, some
* drives (Seagate STT3401A) will return an error.
*/
- if (drive->dsc_overlap) {
+ if (drive->dev_flags & IDE_DFLAG_DSC_OVERLAP) {
ssize_t retval = idetape_queue_rw_tail(drive,
REQ_IDETAPE_WRITE, 0,
tape->merge_bh);
@@ -1886,7 +1830,7 @@ static int idetape_mtioctop(ide_drive_t *drive, short mt_op, int mt_count)
static int idetape_chrdev_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
- struct ide_tape_obj *tape = ide_tape_f(file);
+ struct ide_tape_obj *tape = file->private_data;
ide_drive_t *drive = tape->drive;
struct mtop mtop;
struct mtget mtget;
@@ -2063,7 +2007,7 @@ static void idetape_write_release(ide_drive_t *drive, unsigned int minor)
static int idetape_chrdev_release(struct inode *inode, struct file *filp)
{
- struct ide_tape_obj *tape = ide_tape_f(filp);
+ struct ide_tape_obj *tape = filp->private_data;
ide_drive_t *drive = tape->drive;
unsigned int minor = iminor(inode);
@@ -2202,7 +2146,7 @@ static int divf_tdsc(ide_drive_t *drive) { return HZ; }
static int divf_buffer(ide_drive_t *drive) { return 2; }
static int divf_buffer_size(ide_drive_t *drive) { return 1024; }
-ide_devset_rw_field(dsc_overlap, dsc_overlap);
+ide_devset_rw_flag(dsc_overlap, IDE_DFLAG_DSC_OVERLAP);
ide_tape_devset_rw_field(debug_mask, debug_mask);
ide_tape_devset_rw_field(tdsc, best_dsc_rw_freq);
@@ -2241,33 +2185,32 @@ static void idetape_setup(ide_drive_t *drive, idetape_tape_t *tape, int minor)
unsigned long t;
int speed;
int buffer_size;
- u8 gcw[2];
u16 *ctl = (u16 *)&tape->caps[12];
- drive->pc_callback = ide_tape_callback;
+ drive->pc_callback = ide_tape_callback;
+ drive->pc_update_buffers = idetape_update_buffers;
+ drive->pc_io_buffers = ide_tape_io_buffers;
spin_lock_init(&tape->lock);
- drive->dsc_overlap = 1;
+
+ drive->dev_flags |= IDE_DFLAG_DSC_OVERLAP;
+
if (drive->hwif->host_flags & IDE_HFLAG_NO_DSC) {
printk(KERN_INFO "ide-tape: %s: disabling DSC overlap\n",
tape->name);
- drive->dsc_overlap = 0;
+ drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP;
}
+
/* Seagate Travan drives do not support DSC overlap. */
if (strstr((char *)&drive->id[ATA_ID_PROD], "Seagate STT3401"))
- drive->dsc_overlap = 0;
+ drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP;
+
tape->minor = minor;
tape->name[0] = 'h';
tape->name[1] = 't';
tape->name[2] = '0' + minor;
tape->chrdev_dir = IDETAPE_DIR_NONE;
- *((u16 *)&gcw) = drive->id[ATA_ID_CONFIG];
-
- /* Command packet DRQ type */
- if (((gcw[0] & 0x60) >> 5) == 1)
- set_bit(IDE_AFLAG_DRQ_INTERRUPT, &drive->atapi_flags);
-
idetape_get_inquiry_results(drive);
idetape_get_mode_sense_results(drive);
ide_tape_get_bsize_from_bdesc(drive);
@@ -2302,7 +2245,7 @@ static void idetape_setup(ide_drive_t *drive, idetape_tape_t *tape, int minor)
(*(u16 *)&tape->caps[16] * 512) / tape->buffer_size,
tape->buffer_size / 1024,
tape->best_dsc_rw_freq * 1000 / HZ,
- drive->using_dma ? ", DMA":"");
+ (drive->dev_flags & IDE_DFLAG_USING_DMA) ? ", DMA" : "");
ide_proc_register_driver(drive, tape->driver);
}
@@ -2320,13 +2263,13 @@ static void ide_tape_remove(ide_drive_t *drive)
static void ide_tape_release(struct kref *kref)
{
- struct ide_tape_obj *tape = to_ide_tape(kref);
+ struct ide_tape_obj *tape = to_ide_drv(kref, ide_tape_obj);
ide_drive_t *drive = tape->drive;
struct gendisk *g = tape->disk;
BUG_ON(tape->merge_bh_size);
- drive->dsc_overlap = 0;
+ drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP;
drive->driver_data = NULL;
device_destroy(idetape_sysfs_class, MKDEV(IDETAPE_MAJOR, tape->minor));
device_destroy(idetape_sysfs_class,
@@ -2368,7 +2311,6 @@ static ide_driver_t idetape_driver = {
.probe = ide_tape_probe,
.remove = ide_tape_remove,
.version = IDETAPE_VERSION,
- .media = ide_tape,
.do_request = idetape_do_request,
.end_request = idetape_end_request,
.error = __ide_error,
@@ -2403,7 +2345,7 @@ static int idetape_open(struct inode *inode, struct file *filp)
static int idetape_release(struct inode *inode, struct file *filp)
{
struct gendisk *disk = inode->i_bdev->bd_disk;
- struct ide_tape_obj *tape = ide_tape_g(disk);
+ struct ide_tape_obj *tape = ide_drv_g(disk, ide_tape_obj);
ide_tape_put(tape);
@@ -2414,7 +2356,7 @@ static int idetape_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
struct block_device *bdev = inode->i_bdev;
- struct ide_tape_obj *tape = ide_tape_g(bdev->bd_disk);
+ struct ide_tape_obj *tape = ide_drv_g(bdev->bd_disk, ide_tape_obj);
ide_drive_t *drive = tape->drive;
int err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
if (err == -EINVAL)
@@ -2441,7 +2383,8 @@ static int ide_tape_probe(ide_drive_t *drive)
if (drive->media != ide_tape)
goto failed;
- if (drive->id_read == 1 && !ide_check_atapi_device(drive, DRV_NAME)) {
+ if ((drive->dev_flags & IDE_DFLAG_ID_READ) &&
+ ide_check_atapi_device(drive, DRV_NAME) == 0) {
printk(KERN_ERR "ide-tape: %s: not supported by this version of"
" the driver\n", drive->name);
goto failed;
@@ -2477,12 +2420,11 @@ static int ide_tape_probe(ide_drive_t *drive)
idetape_setup(drive, tape, minor);
- device_create_drvdata(idetape_sysfs_class, &drive->gendev,
- MKDEV(IDETAPE_MAJOR, minor), NULL,
- "%s", tape->name);
- device_create_drvdata(idetape_sysfs_class, &drive->gendev,
- MKDEV(IDETAPE_MAJOR, minor + 128), NULL,
- "n%s", tape->name);
+ device_create(idetape_sysfs_class, &drive->gendev,
+ MKDEV(IDETAPE_MAJOR, minor), NULL, "%s", tape->name);
+ device_create(idetape_sysfs_class, &drive->gendev,
+ MKDEV(IDETAPE_MAJOR, minor + 128), NULL,
+ "n%s", tape->name);
g->fops = &idetape_block_ops;
ide_register_region(g);
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-23 00:54:01 +0000