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.
*
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;
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");
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.
return bcount;
}
-/*
- * 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
*/
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);
+ return ide_transfer_pc(drive, WAIT_TAPE_CMD, NULL);
}
static ide_startstop_t idetape_issue_pc(ide_drive_t *drive,
{
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");
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)) {
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, idetape_transfer_pc, WAIT_TAPE_CMD, NULL);
}
/* A mode sense command is used to "sense" tape parameters. */
{
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);
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;
pc->error = IDETAPE_ERROR_GENERAL;
tape->failed_pc = NULL;
}
- drive->pc_callback(drive);
+ drive->pc_callback(drive, 0);
return ide_stopped;
}
}
/* 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;
}
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;
projects / linux-2.6-omap-h63xx.git / blobdiff