*/
#include <linux/kernel.h>
+#include <linux/cdrom.h>
#include <linux/delay.h>
#include <linux/ide.h>
#include <scsi/scsi.h>
#define debug_log(fmt, args...) do {} while (0)
#endif
+#define ATAPI_MIN_CDB_BYTES 12
+
+static inline int dev_is_idecd(ide_drive_t *drive)
+{
+ return drive->media == ide_cdrom || drive->media == ide_optical;
+}
+
/*
* Check whether we can support a device,
* based on the ATAPI IDENTIFY command results.
* the current request, so that it will be processed immediately, on the next
* pass through the driver.
*/
-void ide_queue_pc_head(ide_drive_t *drive, struct gendisk *disk,
- struct ide_atapi_pc *pc, struct request *rq)
+static void ide_queue_pc_head(ide_drive_t *drive, struct gendisk *disk,
+ struct ide_atapi_pc *pc, struct request *rq)
{
blk_rq_init(NULL, rq);
rq->cmd_type = REQ_TYPE_SPECIAL;
rq->cmd_flags |= REQ_PREEMPT;
rq->buffer = (char *)pc;
rq->rq_disk = disk;
+
+ if (pc->req_xfer) {
+ rq->data = pc->buf;
+ rq->data_len = pc->req_xfer;
+ }
+
memcpy(rq->cmd, pc->c, 12);
if (drive->media == ide_tape)
rq->cmd[13] = REQ_IDETAPE_PC1;
- ide_do_drive_cmd(drive, rq);
+
+ drive->hwif->rq = NULL;
+
+ elv_add_request(drive->queue, rq, ELEVATOR_INSERT_FRONT, 0);
}
-EXPORT_SYMBOL_GPL(ide_queue_pc_head);
/*
* Add a special packet command request to the tail of the request queue,
rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
rq->cmd_type = REQ_TYPE_SPECIAL;
rq->buffer = (char *)pc;
+
+ if (pc->req_xfer) {
+ rq->data = pc->buf;
+ rq->data_len = pc->req_xfer;
+ }
+
memcpy(rq->cmd, pc->c, 12);
if (drive->media == ide_tape)
rq->cmd[13] = REQ_IDETAPE_PC1;
{
struct ide_atapi_pc pc;
- if (drive->atapi_flags & IDE_AFLAG_NO_DOORLOCK)
+ if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0)
return 0;
ide_init_pc(&pc);
}
EXPORT_SYMBOL_GPL(ide_set_media_lock);
-/* TODO: unify the code thus making some arguments go away */
-ide_startstop_t ide_pc_intr(ide_drive_t *drive, struct ide_atapi_pc *pc,
- ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry,
- void (*update_buffers)(ide_drive_t *, struct ide_atapi_pc *),
- void (*retry_pc)(ide_drive_t *), void (*dsc_handle)(ide_drive_t *),
- int (*io_buffers)(ide_drive_t *, struct ide_atapi_pc *, unsigned, int))
+void ide_create_request_sense_cmd(ide_drive_t *drive, struct ide_atapi_pc *pc)
+{
+ ide_init_pc(pc);
+ pc->c[0] = REQUEST_SENSE;
+ if (drive->media == ide_floppy) {
+ pc->c[4] = 255;
+ pc->req_xfer = 18;
+ } else {
+ pc->c[4] = 20;
+ pc->req_xfer = 20;
+ }
+}
+EXPORT_SYMBOL_GPL(ide_create_request_sense_cmd);
+
+/*
+ * 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.
+ */
+void ide_retry_pc(ide_drive_t *drive, struct gendisk *disk)
+{
+ struct request *rq = &drive->request_sense_rq;
+ struct ide_atapi_pc *pc = &drive->request_sense_pc;
+
+ (void)ide_read_error(drive);
+ ide_create_request_sense_cmd(drive, pc);
+ if (drive->media == ide_tape)
+ set_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags);
+ ide_queue_pc_head(drive, disk, pc, rq);
+}
+EXPORT_SYMBOL_GPL(ide_retry_pc);
+
+int ide_cd_expiry(ide_drive_t *drive)
+{
+ struct request *rq = drive->hwif->rq;
+ unsigned long wait = 0;
+
+ debug_log("%s: rq->cmd[0]: 0x%x\n", __func__, rq->cmd[0]);
+
+ /*
+ * Some commands are *slow* and normally take a long time to complete.
+ * Usually we can use the ATAPI "disconnect" to bypass this, but not all
+ * commands/drives support that. Let ide_timer_expiry keep polling us
+ * for these.
+ */
+ switch (rq->cmd[0]) {
+ case GPCMD_BLANK:
+ case GPCMD_FORMAT_UNIT:
+ case GPCMD_RESERVE_RZONE_TRACK:
+ case GPCMD_CLOSE_TRACK:
+ case GPCMD_FLUSH_CACHE:
+ wait = ATAPI_WAIT_PC;
+ break;
+ default:
+ if (!(rq->cmd_flags & REQ_QUIET))
+ printk(KERN_INFO "cmd 0x%x timed out\n",
+ rq->cmd[0]);
+ wait = 0;
+ break;
+ }
+ return wait;
+}
+EXPORT_SYMBOL_GPL(ide_cd_expiry);
+
+int ide_cd_get_xferlen(struct request *rq)
+{
+ if (blk_fs_request(rq))
+ return 32768;
+ else if (blk_sense_request(rq) || blk_pc_request(rq) ||
+ rq->cmd_type == REQ_TYPE_ATA_PC)
+ return rq->data_len;
+ else
+ return 0;
+}
+EXPORT_SYMBOL_GPL(ide_cd_get_xferlen);
+
+void ide_read_bcount_and_ireason(ide_drive_t *drive, u16 *bcount, u8 *ireason)
+{
+ ide_task_t task;
+
+ memset(&task, 0, sizeof(task));
+ task.tf_flags = IDE_TFLAG_IN_LBAH | IDE_TFLAG_IN_LBAM |
+ IDE_TFLAG_IN_NSECT;
+
+ drive->hwif->tp_ops->tf_read(drive, &task);
+
+ *bcount = (task.tf.lbah << 8) | task.tf.lbam;
+ *ireason = task.tf.nsect & 3;
+}
+EXPORT_SYMBOL_GPL(ide_read_bcount_and_ireason);
+
+/*
+ * 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.
+ */
+static ide_startstop_t ide_pc_intr(ide_drive_t *drive)
{
+ struct ide_atapi_pc *pc = drive->pc;
ide_hwif_t *hwif = drive->hwif;
- struct request *rq = hwif->hwgroup->rq;
+ struct request *rq = hwif->rq;
const struct ide_tp_ops *tp_ops = hwif->tp_ops;
xfer_func_t *xferfunc;
- unsigned int temp;
+ unsigned int timeout, temp;
u16 bcount;
- u8 stat, ireason, scsi = drive->scsi;
+ u8 stat, ireason, dsc = 0;
debug_log("Enter %s - interrupt handler\n", __func__);
+ timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD
+ : WAIT_TAPE_CMD;
+
if (pc->flags & PC_FLAG_TIMEDOUT) {
- drive->pc_callback(drive);
+ drive->pc_callback(drive, 0);
return ide_stopped;
}
if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
if (hwif->dma_ops->dma_end(drive) ||
- (drive->media == ide_tape && !scsi && (stat & ATA_ERR))) {
- if (drive->media == ide_floppy && !scsi)
+ (drive->media == ide_tape && (stat & ATA_ERR))) {
+ if (drive->media == ide_floppy)
printk(KERN_ERR "%s: DMA %s error\n",
drive->name, rq_data_dir(pc->rq)
? "write" : "read");
pc->flags |= PC_FLAG_DMA_ERROR;
} else {
pc->xferred = pc->req_xfer;
- if (update_buffers)
- update_buffers(drive, pc);
+ if (drive->pc_update_buffers)
+ drive->pc_update_buffers(drive, pc);
}
debug_log("%s: DMA finished\n", drive->name);
}
local_irq_enable_in_hardirq();
- if (drive->media == ide_tape && !scsi &&
+ if (drive->media == ide_tape &&
(stat & ATA_ERR) && rq->cmd[0] == REQUEST_SENSE)
stat &= ~ATA_ERR;
/* Error detected */
debug_log("%s: I/O error\n", drive->name);
- if (drive->media != ide_tape || scsi) {
+ if (drive->media != ide_tape)
pc->rq->errors++;
- if (scsi)
- goto cmd_finished;
- }
if (rq->cmd[0] == REQUEST_SENSE) {
printk(KERN_ERR "%s: I/O error in request sense"
debug_log("[cmd %x]: check condition\n", rq->cmd[0]);
/* Retry operation */
- retry_pc(drive);
+ ide_retry_pc(drive, rq->rq_disk);
/* queued, but not started */
return ide_stopped;
}
-cmd_finished:
pc->error = 0;
- if ((pc->flags & PC_FLAG_WAIT_FOR_DSC) &&
- (stat & ATA_DSC) == 0) {
- dsc_handle(drive);
- return ide_stopped;
- }
+
+ if ((pc->flags & PC_FLAG_WAIT_FOR_DSC) && (stat & ATA_DSC) == 0)
+ dsc = 1;
/* Command finished - Call the callback function */
- drive->pc_callback(drive);
+ drive->pc_callback(drive, dsc);
return ide_stopped;
}
"us more data than expected - "
"discarding data\n",
drive->name);
- if (scsi)
- temp = pc->buf_size - pc->xferred;
- else
- temp = 0;
- if (temp) {
- if (pc->sg)
- io_buffers(drive, pc, temp, 0);
- else
- tp_ops->input_data(drive, NULL,
- pc->cur_pos, temp);
- printk(KERN_ERR "%s: transferred %d of "
- "%d bytes\n",
- drive->name,
- temp, bcount);
- }
- pc->xferred += temp;
- pc->cur_pos += temp;
- ide_pad_transfer(drive, 0, bcount - temp);
- ide_set_handler(drive, handler, timeout,
- expiry);
- return ide_started;
+
+ ide_pad_transfer(drive, 0, bcount);
+ goto next_irq;
}
debug_log("The device wants to send us more data than "
"expected - allowing transfer\n");
} else
xferfunc = tp_ops->output_data;
- if ((drive->media == ide_floppy && !scsi && !pc->buf) ||
- (drive->media == ide_tape && !scsi && pc->bh) ||
- (scsi && pc->sg)) {
- int done = io_buffers(drive, pc, bcount,
+ if ((drive->media == ide_floppy && !pc->buf) ||
+ (drive->media == ide_tape && pc->bh)) {
+ int done = drive->pc_io_buffers(drive, pc, bcount,
!!(pc->flags & PC_FLAG_WRITING));
/* FIXME: don't do partial completions */
- if (drive->media == ide_floppy && !scsi)
+ if (drive->media == ide_floppy)
ide_end_request(drive, 1, done >> 9);
} else
xferfunc(drive, NULL, pc->cur_pos, bcount);
debug_log("[cmd %x] transferred %d bytes on that intr.\n",
rq->cmd[0], bcount);
-
+next_irq:
/* And set the interrupt handler again */
- ide_set_handler(drive, handler, timeout, expiry);
+ ide_set_handler(drive, ide_pc_intr, timeout, NULL);
return ide_started;
}
-EXPORT_SYMBOL_GPL(ide_pc_intr);
+
+static void ide_pktcmd_tf_load(ide_drive_t *drive, u32 tf_flags, u16 bcount)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ ide_task_t task;
+ u8 dma = drive->dma;
+
+ memset(&task, 0, sizeof(task));
+ task.tf_flags = IDE_TFLAG_OUT_LBAH | IDE_TFLAG_OUT_LBAM |
+ IDE_TFLAG_OUT_FEATURE | tf_flags;
+ task.tf.feature = dma; /* Use PIO/DMA */
+ task.tf.lbam = bcount & 0xff;
+ task.tf.lbah = (bcount >> 8) & 0xff;
+
+ ide_tf_dump(drive->name, &task.tf);
+ hwif->tp_ops->set_irq(hwif, 1);
+ SELECT_MASK(drive, 0);
+ hwif->tp_ops->tf_load(drive, &task);
+}
static u8 ide_read_ireason(ide_drive_t *drive)
{
return ireason;
}
-ide_startstop_t ide_transfer_pc(ide_drive_t *drive, struct ide_atapi_pc *pc,
- ide_handler_t *handler, unsigned int timeout,
- ide_expiry_t *expiry)
+static int ide_delayed_transfer_pc(ide_drive_t *drive)
{
+ /* Send the actual packet */
+ drive->hwif->tp_ops->output_data(drive, NULL, drive->pc->c, 12);
+
+ /* Timeout for the packet command */
+ return WAIT_FLOPPY_CMD;
+}
+
+static ide_startstop_t ide_transfer_pc(ide_drive_t *drive)
+{
+ struct ide_atapi_pc *uninitialized_var(pc);
ide_hwif_t *hwif = drive->hwif;
- struct request *rq = hwif->hwgroup->rq;
+ struct request *rq = hwif->rq;
+ ide_expiry_t *expiry;
+ unsigned int timeout;
+ int cmd_len;
ide_startstop_t startstop;
u8 ireason;
return startstop;
}
- ireason = ide_read_ireason(drive);
- if (drive->media == ide_tape && !drive->scsi)
- ireason = ide_wait_ireason(drive, ireason);
+ if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
+ if (drive->dma)
+ drive->waiting_for_dma = 1;
+ }
- if ((ireason & ATAPI_COD) == 0 || (ireason & ATAPI_IO)) {
- printk(KERN_ERR "%s: (IO,CoD) != (0,1) while issuing "
- "a packet command\n", drive->name);
- return ide_do_reset(drive);
+ if (dev_is_idecd(drive)) {
+ /* ATAPI commands get padded out to 12 bytes minimum */
+ cmd_len = COMMAND_SIZE(rq->cmd[0]);
+ if (cmd_len < ATAPI_MIN_CDB_BYTES)
+ cmd_len = ATAPI_MIN_CDB_BYTES;
+
+ timeout = rq->timeout;
+ expiry = ide_cd_expiry;
+ } else {
+ pc = drive->pc;
+
+ cmd_len = ATAPI_MIN_CDB_BYTES;
+
+ /*
+ * If necessary schedule the packet transfer to occur 'timeout'
+ * miliseconds later in ide_delayed_transfer_pc() after the
+ * device says it's ready for a packet.
+ */
+ if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) {
+ timeout = drive->pc_delay;
+ expiry = &ide_delayed_transfer_pc;
+ } else {
+ timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD
+ : WAIT_TAPE_CMD;
+ expiry = NULL;
+ }
+
+ ireason = ide_read_ireason(drive);
+ if (drive->media == ide_tape)
+ ireason = ide_wait_ireason(drive, ireason);
+
+ if ((ireason & ATAPI_COD) == 0 || (ireason & ATAPI_IO)) {
+ printk(KERN_ERR "%s: (IO,CoD) != (0,1) while issuing "
+ "a packet command\n", drive->name);
+
+ return ide_do_reset(drive);
+ }
}
/* Set the interrupt routine */
- ide_set_handler(drive, handler, timeout, expiry);
+ ide_set_handler(drive,
+ (dev_is_idecd(drive) ? drive->irq_handler
+ : ide_pc_intr),
+ timeout, expiry);
/* Begin DMA, if necessary */
- if (pc->flags & PC_FLAG_DMA_OK) {
- pc->flags |= PC_FLAG_DMA_IN_PROGRESS;
- hwif->dma_ops->dma_start(drive);
+ if (dev_is_idecd(drive)) {
+ if (drive->dma)
+ hwif->dma_ops->dma_start(drive);
+ } else {
+ if (pc->flags & PC_FLAG_DMA_OK) {
+ pc->flags |= PC_FLAG_DMA_IN_PROGRESS;
+ hwif->dma_ops->dma_start(drive);
+ }
}
/* Send the actual packet */
if ((drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) == 0)
- hwif->tp_ops->output_data(drive, NULL, rq->cmd, 12);
+ hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len);
return ide_started;
}
-EXPORT_SYMBOL_GPL(ide_transfer_pc);
-ide_startstop_t ide_issue_pc(ide_drive_t *drive, struct ide_atapi_pc *pc,
- ide_handler_t *handler, unsigned int timeout,
- ide_expiry_t *expiry)
+ide_startstop_t ide_issue_pc(ide_drive_t *drive)
{
+ struct ide_atapi_pc *pc;
ide_hwif_t *hwif = drive->hwif;
+ ide_expiry_t *expiry = NULL;
+ unsigned int timeout;
+ u32 tf_flags;
u16 bcount;
- u8 dma = 0;
- /* We haven't transferred any data yet */
- pc->xferred = 0;
- pc->cur_pos = pc->buf;
+ if (dev_is_idecd(drive)) {
+ tf_flags = IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL;
+ bcount = ide_cd_get_xferlen(hwif->rq);
+ expiry = ide_cd_expiry;
+ timeout = ATAPI_WAIT_PC;
- /* Request to transfer the entire buffer at once */
- if (drive->media == ide_tape && !drive->scsi)
- bcount = pc->req_xfer;
- else
- bcount = min(pc->req_xfer, 63 * 1024);
+ if (drive->dma)
+ drive->dma = !hwif->dma_ops->dma_setup(drive);
+ } else {
+ pc = drive->pc;
- if (pc->flags & PC_FLAG_DMA_ERROR) {
- pc->flags &= ~PC_FLAG_DMA_ERROR;
- ide_dma_off(drive);
- }
+ /* We haven't transferred any data yet */
+ pc->xferred = 0;
+ pc->cur_pos = pc->buf;
- if ((pc->flags & PC_FLAG_DMA_OK) && drive->using_dma) {
- if (drive->scsi)
- hwif->sg_mapped = 1;
- dma = !hwif->dma_ops->dma_setup(drive);
- if (drive->scsi)
- hwif->sg_mapped = 0;
- }
+ tf_flags = IDE_TFLAG_OUT_DEVICE;
+ bcount = ((drive->media == ide_tape) ?
+ pc->req_xfer :
+ min(pc->req_xfer, 63 * 1024));
- if (!dma)
- pc->flags &= ~PC_FLAG_DMA_OK;
+ if (pc->flags & PC_FLAG_DMA_ERROR) {
+ pc->flags &= ~PC_FLAG_DMA_ERROR;
+ ide_dma_off(drive);
+ }
+
+ if ((pc->flags & PC_FLAG_DMA_OK) &&
+ (drive->dev_flags & IDE_DFLAG_USING_DMA))
+ drive->dma = !hwif->dma_ops->dma_setup(drive);
+
+ if (!drive->dma)
+ pc->flags &= ~PC_FLAG_DMA_OK;
+
+ timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD
+ : WAIT_TAPE_CMD;
+ }
- ide_pktcmd_tf_load(drive, drive->scsi ? 0 : IDE_TFLAG_OUT_DEVICE,
- bcount, dma);
+ ide_pktcmd_tf_load(drive, tf_flags, bcount);
/* Issue the packet command */
if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
- ide_execute_command(drive, ATA_CMD_PACKET, handler,
- timeout, NULL);
+ if (drive->dma)
+ drive->waiting_for_dma = 0;
+ ide_execute_command(drive, ATA_CMD_PACKET, ide_transfer_pc,
+ timeout, expiry);
return ide_started;
} else {
ide_execute_pkt_cmd(drive);
- return (*handler)(drive);
+ return ide_transfer_pc(drive);
}
}
EXPORT_SYMBOL_GPL(ide_issue_pc);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff