/*
- * linux/drivers/ide/ide-cd.c
+ * ATAPI CD-ROM driver.
*
- * Copyright (C) 1994, 1995, 1996 scott snyder <snyder@fnald0.fnal.gov>
- * Copyright (C) 1996-1998 Erik Andersen <andersee@debian.org>
- * Copyright (C) 1998-2000 Jens Axboe <axboe@suse.de>
+ * Copyright (C) 1994-1996 Scott Snyder <snyder@fnald0.fnal.gov>
+ * Copyright (C) 1996-1998 Erik Andersen <andersee@debian.org>
+ * Copyright (C) 1998-2000 Jens Axboe <axboe@suse.de>
+ * Copyright (C) 2005, 2007 Bartlomiej Zolnierkiewicz
*
* May be copied or modified under the terms of the GNU General Public
* License. See linux/COPYING for more information.
*
- * ATAPI CD-ROM driver. To be used with ide.c.
* See Documentation/cdrom/ide-cd for usage information.
*
* Suggestions are welcome. Patches that work are more welcome though. ;-)
* ftp://fission.dt.wdc.com/pub/standards/SFF_atapi/spec/SFF8020-r2.6/PS/8020r26.ps
* ftp://ftp.avc-pioneer.com/Mtfuji4/Spec/Fuji4r10.pdf
*
- * Drives that deviate from these standards will be accommodated as much
- * as possible via compile time or command-line options. Since I only have
- * a few drives, you generally need to send me patches...
- *
- * ----------------------------------
- * TO DO LIST:
- * -Make it so that Pioneer CD DR-A24X and friends don't get screwed up on
- * boot
- *
* For historical changelog please see:
* Documentation/ide/ChangeLog.ide-cd.1994-2004
*/
-#define IDECD_VERSION "4.61"
+#define IDECD_VERSION "5.00"
#include <linux/module.h>
#include <linux/types.h>
int stat, err, sense_key;
/* Check for errors. */
- stat = HWIF(drive)->INB(IDE_STATUS_REG);
+ stat = ide_read_status(drive);
+
if (stat_ret)
*stat_ret = stat;
return 0;
/* Get the IDE error register. */
- err = HWIF(drive)->INB(IDE_ERROR_REG);
+ err = ide_read_error(drive);
sense_key = err >> 4;
if (rq == NULL) {
} else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
/* All other functions, except for READ. */
- unsigned long flags;
/*
* if we have an error, pass back CHECK_CONDITION as the
* remove failed request completely and end it when the
* request sense has completed
*/
- if (stat & ERR_STAT) {
- spin_lock_irqsave(&ide_lock, flags);
- blkdev_dequeue_request(rq);
- HWGROUP(drive)->rq = NULL;
- spin_unlock_irqrestore(&ide_lock, flags);
-
- cdrom_queue_request_sense(drive, rq->sense, rq);
- } else
- cdrom_end_request(drive, 0);
+ goto end_request;
} else if (blk_fs_request(rq)) {
int do_end_request = 0;
sense data. We need this in order to perform end of media
processing */
- if (do_end_request) {
- if (stat & ERR_STAT) {
- unsigned long flags;
- spin_lock_irqsave(&ide_lock, flags);
- blkdev_dequeue_request(rq);
- HWGROUP(drive)->rq = NULL;
- spin_unlock_irqrestore(&ide_lock, flags);
+ if (do_end_request)
+ goto end_request;
- cdrom_queue_request_sense(drive, rq->sense, rq);
- } else
- cdrom_end_request(drive, 0);
- } else {
- /* If we got a CHECK_CONDITION status,
- queue a request sense command. */
- if (stat & ERR_STAT)
- cdrom_queue_request_sense(drive, NULL, NULL);
- }
+ /*
+ * If we got a CHECK_CONDITION status,
+ * queue a request sense command.
+ */
+ if (stat & ERR_STAT)
+ cdrom_queue_request_sense(drive, NULL, NULL);
} else {
blk_dump_rq_flags(rq, "ide-cd: bad rq");
cdrom_end_request(drive, 0);
/* Retry, or handle the next request. */
return 1;
+
+end_request:
+ if (stat & ERR_STAT) {
+ unsigned long flags;
+
+ spin_lock_irqsave(&ide_lock, flags);
+ blkdev_dequeue_request(rq);
+ HWGROUP(drive)->rq = NULL;
+ spin_unlock_irqrestore(&ide_lock, flags);
+
+ cdrom_queue_request_sense(drive, rq->sense, rq);
+ } else
+ cdrom_end_request(drive, 0);
+
+ return 1;
}
static int cdrom_timer_expiry(ide_drive_t *drive)
* Block read functions.
*/
-typedef void (xfer_func_t)(ide_drive_t *, void *, u32);
-
static void ide_cd_pad_transfer(ide_drive_t *drive, xfer_func_t *xf, int len)
{
while (len > 0) {
}
}
+static void ide_cd_drain_data(ide_drive_t *drive, int nsects)
+{
+ while (nsects > 0) {
+ static char dum[SECTOR_SIZE];
+
+ drive->hwif->atapi_input_bytes(drive, dum, sizeof(dum));
+ nsects--;
+ }
+}
+
/*
* Buffer up to SECTORS_TO_TRANSFER sectors from the drive in our sector
* buffer. Once the first sector is added, any subsequent sectors are
}
/* Throw away any remaining data. */
- while (sectors_to_transfer > 0) {
- static char dum[SECTOR_SIZE];
- HWIF(drive)->atapi_input_bytes(drive, dum, sizeof (dum));
- --sectors_to_transfer;
- }
+ ide_cd_drain_data(drive, sectors_to_transfer);
}
/*
* ok; nonzero if the request has been terminated.
*/
static
-int cdrom_read_check_ireason (ide_drive_t *drive, int len, int ireason)
+int ide_cd_check_ireason(ide_drive_t *drive, int len, int ireason, int rw)
{
- if (ireason == 2)
+ /*
+ * ireason == 0: the drive wants to receive data from us
+ * ireason == 2: the drive is expecting to transfer data to us
+ */
+ if (ireason == (!rw << 1))
return 0;
- else if (ireason == 0) {
+ else if (ireason == (rw << 1)) {
ide_hwif_t *hwif = drive->hwif;
+ xfer_func_t *xf;
- /* Whoops... The drive is expecting to receive data from us! */
+ /* Whoops... */
printk(KERN_ERR "%s: %s: wrong transfer direction!\n",
drive->name, __FUNCTION__);
- /* Throw some data at the drive so it doesn't hang
- and quit this request. */
- ide_cd_pad_transfer(drive, hwif->atapi_output_bytes, len);
- } else if (ireason == 1) {
+ xf = rw ? hwif->atapi_output_bytes : hwif->atapi_input_bytes;
+ ide_cd_pad_transfer(drive, xf, len);
+ } else if (rw == 0 && ireason == 1) {
/* Some drives (ASUS) seem to tell us that status
* info is available. just get it and ignore.
*/
- (void) HWIF(drive)->INB(IDE_STATUS_REG);
+ (void)ide_read_status(drive);
return 0;
} else {
/* Drive wants a command packet, or invalid ireason... */
}
/*
- * Interrupt routine. Called when a read request has completed.
+ * Assume that the drive will always provide data in multiples of at least
+ * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
*/
-static ide_startstop_t cdrom_read_intr (ide_drive_t *drive)
+static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
{
- int stat;
- int ireason, len, sectors_to_transfer, nskip;
- struct cdrom_info *info = drive->driver_data;
- u8 lowcyl = 0, highcyl = 0;
- int dma = info->dma, dma_error = 0;
-
- struct request *rq = HWGROUP(drive)->rq;
-
- /*
- * handle dma case
- */
- if (dma) {
- info->dma = 0;
- dma_error = HWIF(drive)->ide_dma_end(drive);
- if (dma_error) {
- printk(KERN_ERR "%s: DMA read error\n", drive->name);
- ide_dma_off(drive);
- }
- }
-
- if (cdrom_decode_status(drive, 0, &stat))
- return ide_stopped;
-
- if (dma) {
- if (!dma_error) {
- ide_end_request(drive, 1, rq->nr_sectors);
- return ide_stopped;
- } else
- return ide_error(drive, "dma error", stat);
- }
-
- /* Read the interrupt reason and the transfer length. */
- ireason = HWIF(drive)->INB(IDE_IREASON_REG) & 0x3;
- lowcyl = HWIF(drive)->INB(IDE_BCOUNTL_REG);
- highcyl = HWIF(drive)->INB(IDE_BCOUNTH_REG);
-
- len = lowcyl + (256 * highcyl);
-
- /* If DRQ is clear, the command has completed. */
- if ((stat & DRQ_STAT) == 0) {
- /* If we're not done filling the current buffer, complain.
- Otherwise, complete the command normally. */
- if (rq->current_nr_sectors > 0) {
- printk (KERN_ERR "%s: cdrom_read_intr: data underrun (%d blocks)\n",
- drive->name, rq->current_nr_sectors);
- rq->cmd_flags |= REQ_FAILED;
- cdrom_end_request(drive, 0);
- } else
- cdrom_end_request(drive, 1);
- return ide_stopped;
- }
-
- /* Check that the drive is expecting to do the same thing we are. */
- if (cdrom_read_check_ireason (drive, len, ireason))
- return ide_stopped;
-
- /* Assume that the drive will always provide data in multiples
- of at least SECTOR_SIZE, as it gets hairy to keep track
- of the transfers otherwise. */
- if ((len % SECTOR_SIZE) != 0) {
- printk (KERN_ERR "%s: cdrom_read_intr: Bad transfer size %d\n",
- drive->name, len);
- if (info->cd_flags & IDE_CD_FLAG_LIMIT_NFRAMES)
- printk (KERN_ERR " This drive is not supported by this version of the driver\n");
- else {
- printk (KERN_ERR " Trying to limit transfer sizes\n");
- info->cd_flags |= IDE_CD_FLAG_LIMIT_NFRAMES;
- }
- cdrom_end_request(drive, 0);
- return ide_stopped;
- }
-
- /* The number of sectors we need to read from the drive. */
- sectors_to_transfer = len / SECTOR_SIZE;
-
- /* First, figure out if we need to bit-bucket
- any of the leading sectors. */
- nskip = min_t(int, rq->current_nr_sectors - bio_cur_sectors(rq->bio), sectors_to_transfer);
-
- while (nskip > 0) {
- /* We need to throw away a sector. */
- static char dum[SECTOR_SIZE];
- HWIF(drive)->atapi_input_bytes(drive, dum, sizeof (dum));
-
- --rq->current_nr_sectors;
- --nskip;
- --sectors_to_transfer;
- }
+ struct cdrom_info *cd = drive->driver_data;
- /* Now loop while we still have data to read from the drive. */
- while (sectors_to_transfer > 0) {
- int this_transfer;
+ if ((len % SECTOR_SIZE) == 0)
+ return 0;
- /* If we've filled the present buffer but there's another
- chained buffer after it, move on. */
- if (rq->current_nr_sectors == 0 && rq->nr_sectors)
- cdrom_end_request(drive, 1);
+ printk(KERN_ERR "%s: %s: Bad transfer size %d\n",
+ drive->name, __FUNCTION__, len);
- /* If the buffers are full, cache the rest of the data in our
- internal buffer. */
- if (rq->current_nr_sectors == 0) {
- cdrom_buffer_sectors(drive, rq->sector, sectors_to_transfer);
- sectors_to_transfer = 0;
- } else {
- /* Transfer data to the buffers.
- Figure out how many sectors we can transfer
- to the current buffer. */
- this_transfer = min_t(int, sectors_to_transfer,
- rq->current_nr_sectors);
-
- /* Read this_transfer sectors
- into the current buffer. */
- while (this_transfer > 0) {
- HWIF(drive)->atapi_input_bytes(drive, rq->buffer, SECTOR_SIZE);
- rq->buffer += SECTOR_SIZE;
- --rq->nr_sectors;
- --rq->current_nr_sectors;
- ++rq->sector;
- --this_transfer;
- --sectors_to_transfer;
- }
- }
+ if (cd->cd_flags & IDE_CD_FLAG_LIMIT_NFRAMES)
+ printk(KERN_ERR " This drive is not supported by "
+ "this version of the driver\n");
+ else {
+ printk(KERN_ERR " Trying to limit transfer sizes\n");
+ cd->cd_flags |= IDE_CD_FLAG_LIMIT_NFRAMES;
}
- /* Done moving data! Wait for another interrupt. */
- ide_set_handler(drive, &cdrom_read_intr, ATAPI_WAIT_PC, NULL);
- return ide_started;
+ return 1;
}
/*
return 0;
}
+static ide_startstop_t cdrom_newpc_intr(ide_drive_t *);
+
/*
- * Routine to send a read packet command to the drive.
- * This is usually called directly from cdrom_start_read.
+ * Routine to send a read/write packet command to the drive.
+ * This is usually called directly from cdrom_start_{read,write}().
* However, for drq_interrupt devices, it is called from an interrupt
* when the drive is ready to accept the command.
*/
-static ide_startstop_t cdrom_start_read_continuation (ide_drive_t *drive)
+static ide_startstop_t cdrom_start_rw_cont(ide_drive_t *drive)
{
struct request *rq = HWGROUP(drive)->rq;
- unsigned short sectors_per_frame;
- int nskip;
- sectors_per_frame = queue_hardsect_size(drive->queue) >> SECTOR_BITS;
+ if (rq_data_dir(rq) == READ) {
+ unsigned short sectors_per_frame =
+ queue_hardsect_size(drive->queue) >> SECTOR_BITS;
+ int nskip = rq->sector & (sectors_per_frame - 1);
- /* If the requested sector doesn't start on a cdrom block boundary,
- we must adjust the start of the transfer so that it does,
- and remember to skip the first few sectors.
- If the CURRENT_NR_SECTORS field is larger than the size
- of the buffer, it will mean that we're to skip a number
- of sectors equal to the amount by which CURRENT_NR_SECTORS
- is larger than the buffer size. */
- nskip = rq->sector & (sectors_per_frame - 1);
- if (nskip > 0) {
- /* Sanity check... */
- if (rq->current_nr_sectors != bio_cur_sectors(rq->bio) &&
- (rq->sector & (sectors_per_frame - 1))) {
- printk(KERN_ERR "%s: cdrom_start_read_continuation: buffer botch (%u)\n",
- drive->name, rq->current_nr_sectors);
- cdrom_end_request(drive, 0);
- return ide_stopped;
+ /*
+ * If the requested sector doesn't start on a frame boundary,
+ * we must adjust the start of the transfer so that it does,
+ * and remember to skip the first few sectors.
+ *
+ * If the rq->current_nr_sectors field is larger than the size
+ * of the buffer, it will mean that we're to skip a number of
+ * sectors equal to the amount by which rq->current_nr_sectors
+ * is larger than the buffer size.
+ */
+ if (nskip > 0) {
+ /* Sanity check... */
+ if (rq->current_nr_sectors !=
+ bio_cur_sectors(rq->bio)) {
+ printk(KERN_ERR "%s: %s: buffer botch (%u)\n",
+ drive->name, __FUNCTION__,
+ rq->current_nr_sectors);
+ cdrom_end_request(drive, 0);
+ return ide_stopped;
+ }
+ rq->current_nr_sectors += nskip;
}
- rq->current_nr_sectors += nskip;
}
-
+#if 0
+ else
+ /* the immediate bit */
+ rq->cmd[1] = 1 << 3;
+#endif
/* Set up the command */
rq->timeout = ATAPI_WAIT_PC;
/* Send the command to the drive and return. */
- return cdrom_transfer_packet_command(drive, rq, &cdrom_read_intr);
+ return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
}
-
#define IDECD_SEEK_THRESHOLD (1000) /* 1000 blocks */
#define IDECD_SEEK_TIMER (5 * WAIT_MIN_SLEEP) /* 100 ms */
#define IDECD_SEEK_TIMEOUT (2 * WAIT_CMD) /* 20 sec */
rq->q->prep_rq_fn(rq->q, rq);
}
-/*
- * Start a read request from the CD-ROM.
- */
-static ide_startstop_t cdrom_start_read (ide_drive_t *drive, unsigned int block)
-{
- struct cdrom_info *info = drive->driver_data;
- struct request *rq = HWGROUP(drive)->rq;
- unsigned short sectors_per_frame;
-
- sectors_per_frame = queue_hardsect_size(drive->queue) >> SECTOR_BITS;
-
- /* We may be retrying this request after an error. Fix up
- any weirdness which might be present in the request packet. */
- restore_request(rq);
-
- /* Satisfy whatever we can of this request from our cached sector. */
- if (cdrom_read_from_buffer(drive))
- return ide_stopped;
-
- /* Clear the local sector buffer. */
- info->nsectors_buffered = 0;
-
- /* use dma, if possible. */
- info->dma = drive->using_dma;
- if ((rq->sector & (sectors_per_frame - 1)) ||
- (rq->nr_sectors & (sectors_per_frame - 1)))
- info->dma = 0;
-
- /* Start sending the read request to the drive. */
- return cdrom_start_packet_command(drive, 32768, cdrom_start_read_continuation);
-}
-
/****************************************************************************
* Execute all other packet commands.
*/
-/* Interrupt routine for packet command completion. */
-static ide_startstop_t cdrom_pc_intr (ide_drive_t *drive)
+static void ide_cd_request_sense_fixup(struct request *rq)
{
- struct request *rq = HWGROUP(drive)->rq;
- xfer_func_t *xferfunc = NULL;
- int stat, ireason, len, thislen, write;
- u8 lowcyl = 0, highcyl = 0;
-
- /* Check for errors. */
- if (cdrom_decode_status(drive, 0, &stat))
- return ide_stopped;
-
- /* Read the interrupt reason and the transfer length. */
- ireason = HWIF(drive)->INB(IDE_IREASON_REG) & 0x3;
- lowcyl = HWIF(drive)->INB(IDE_BCOUNTL_REG);
- highcyl = HWIF(drive)->INB(IDE_BCOUNTH_REG);
-
- len = lowcyl + (256 * highcyl);
-
- /* If DRQ is clear, the command has completed.
- Complain if we still have data left to transfer. */
- if ((stat & DRQ_STAT) == 0) {
- /* Some of the trailing request sense fields are optional, and
- some drives don't send them. Sigh. */
- if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
- rq->data_len > 0 &&
- rq->data_len <= 5) {
- while (rq->data_len > 0) {
- *(unsigned char *)rq->data++ = 0;
- --rq->data_len;
- }
- }
-
- if (rq->data_len == 0)
- cdrom_end_request(drive, 1);
- else {
- rq->cmd_flags |= REQ_FAILED;
- cdrom_end_request(drive, 0);
- }
- return ide_stopped;
- }
-
- /* Figure out how much data to transfer. */
- thislen = rq->data_len;
- if (thislen > len)
- thislen = len;
-
- if (ireason == 0) {
- write = 1;
- xferfunc = HWIF(drive)->atapi_output_bytes;
- } else if (ireason == 2) {
- write = 0;
- xferfunc = HWIF(drive)->atapi_input_bytes;
- }
-
- if (xferfunc) {
- if (!rq->data) {
- printk(KERN_ERR "%s: confused, missing data\n",
- drive->name);
- blk_dump_rq_flags(rq, write ? "cdrom_pc_intr, write"
- : "cdrom_pc_intr, read");
- goto pad;
- }
- /* Transfer the data. */
- xferfunc(drive, rq->data, thislen);
-
- /* Keep count of how much data we've moved. */
- len -= thislen;
- rq->data += thislen;
- rq->data_len -= thislen;
-
- if (write && blk_sense_request(rq))
- rq->sense_len += thislen;
- } else {
- printk (KERN_ERR "%s: cdrom_pc_intr: The drive "
- "appears confused (ireason = 0x%02x). "
- "Trying to recover by ending request.\n",
- drive->name, ireason);
- rq->cmd_flags |= REQ_FAILED;
- cdrom_end_request(drive, 0);
- return ide_stopped;
- }
-pad:
/*
- * If we haven't moved enough data to satisfy the drive,
- * add some padding.
+ * Some of the trailing request sense fields are optional,
+ * and some drives don't send them. Sigh.
*/
- if (len > 0)
- ide_cd_pad_transfer(drive, xferfunc, len);
-
- /* Now we wait for another interrupt. */
- ide_set_handler(drive, &cdrom_pc_intr, ATAPI_WAIT_PC, cdrom_timer_expiry);
- return ide_started;
-}
-
-static ide_startstop_t cdrom_do_pc_continuation (ide_drive_t *drive)
-{
- struct request *rq = HWGROUP(drive)->rq;
-
- if (!rq->timeout)
- rq->timeout = ATAPI_WAIT_PC;
-
- /* Send the command to the drive and return. */
- return cdrom_transfer_packet_command(drive, rq, &cdrom_pc_intr);
-}
-
-
-static ide_startstop_t cdrom_do_packet_command (ide_drive_t *drive)
-{
- int len;
- struct request *rq = HWGROUP(drive)->rq;
- struct cdrom_info *info = drive->driver_data;
-
- info->dma = 0;
- rq->cmd_flags &= ~REQ_FAILED;
- len = rq->data_len;
-
- /* Start sending the command to the drive. */
- return cdrom_start_packet_command(drive, len, cdrom_do_pc_continuation);
+ if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
+ rq->data_len > 0 && rq->data_len <= 5)
+ while (rq->data_len > 0) {
+ *(u8 *)rq->data++ = 0;
+ --rq->data_len;
+ }
}
int ide_cd_queue_pc(ide_drive_t *drive, struct request *rq)
return (rq->cmd_flags & REQ_FAILED) ? -EIO : 0;
}
-/*
- * Write handling
- */
-static int cdrom_write_check_ireason(ide_drive_t *drive, int len, int ireason)
-{
- /* Two notes about IDE interrupt reason here - 0 means that
- * the drive wants to receive data from us, 2 means that
- * the drive is expecting to transfer data to us.
- */
- if (ireason == 0)
- return 0;
- else if (ireason == 2) {
- ide_hwif_t *hwif = drive->hwif;
-
- /* Whoops... The drive wants to send data. */
- printk(KERN_ERR "%s: %s: wrong transfer direction!\n",
- drive->name, __FUNCTION__);
-
- ide_cd_pad_transfer(drive, hwif->atapi_input_bytes, len);
- } else {
- /* Drive wants a command packet, or invalid ireason... */
- printk(KERN_ERR "%s: %s: bad interrupt reason 0x%02x\n",
- drive->name, __FUNCTION__, ireason);
- }
-
- cdrom_end_request(drive, 0);
- return 1;
-}
-
/*
* Called from blk_end_request_callback() after the data of the request
* is completed and before the request is completed.
return 1;
}
-/*
- * best way to deal with dma that is not sector aligned right now... note
- * that in this path we are not using ->data or ->buffer at all. this irs
- * can replace cdrom_pc_intr, cdrom_read_intr, and cdrom_write_intr in the
- * future.
- */
static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
{
struct cdrom_info *info = drive->driver_data;
struct request *rq = HWGROUP(drive)->rq;
- int dma_error, dma, stat, ireason, len, thislen;
- u8 lowcyl, highcyl;
xfer_func_t *xferfunc;
- unsigned long flags;
+ ide_expiry_t *expiry = NULL;
+ int dma_error = 0, dma, stat, ireason, len, thislen, uptodate = 0;
+ int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
+ unsigned int timeout;
+ u8 lowcyl, highcyl;
/* Check for errors. */
- dma_error = 0;
dma = info->dma;
if (dma) {
info->dma = 0;
dma_error = HWIF(drive)->ide_dma_end(drive);
if (dma_error) {
printk(KERN_ERR "%s: DMA %s error\n", drive->name,
- rq_data_dir(rq) ? "write" : "read");
+ write ? "write" : "read");
ide_dma_off(drive);
}
}
if (dma) {
if (dma_error)
return ide_error(drive, "dma error", stat);
-
- spin_lock_irqsave(&ide_lock, flags);
- if (__blk_end_request(rq, 0, rq->data_len))
- BUG();
- HWGROUP(drive)->rq = NULL;
- spin_unlock_irqrestore(&ide_lock, flags);
-
- return ide_stopped;
+ if (blk_fs_request(rq)) {
+ ide_end_request(drive, 1, rq->nr_sectors);
+ return ide_stopped;
+ }
+ goto end_request;
}
/*
highcyl = HWIF(drive)->INB(IDE_BCOUNTH_REG);
len = lowcyl + (256 * highcyl);
- thislen = rq->data_len;
+
+ thislen = blk_fs_request(rq) ? len : rq->data_len;
if (thislen > len)
thislen = len;
* If DRQ is clear, the command has completed.
*/
if ((stat & DRQ_STAT) == 0) {
- spin_lock_irqsave(&ide_lock, flags);
- if (__blk_end_request(rq, 0, rq->data_len))
- BUG();
- HWGROUP(drive)->rq = NULL;
- spin_unlock_irqrestore(&ide_lock, flags);
-
- return ide_stopped;
+ if (blk_fs_request(rq)) {
+ /*
+ * If we're not done reading/writing, complain.
+ * Otherwise, complete the command normally.
+ */
+ uptodate = 1;
+ if (rq->current_nr_sectors > 0) {
+ printk(KERN_ERR "%s: %s: data underrun "
+ "(%d blocks)\n",
+ drive->name, __FUNCTION__,
+ rq->current_nr_sectors);
+ if (!write)
+ rq->cmd_flags |= REQ_FAILED;
+ uptodate = 0;
+ }
+ cdrom_end_request(drive, uptodate);
+ return ide_stopped;
+ } else if (!blk_pc_request(rq)) {
+ ide_cd_request_sense_fixup(rq);
+ /* Complain if we still have data left to transfer. */
+ uptodate = rq->data_len ? 0 : 1;
+ }
+ goto end_request;
}
/*
* check which way to transfer data
*/
- if (rq_data_dir(rq) == WRITE) {
- /*
- * write to drive
- */
- if (cdrom_write_check_ireason(drive, len, ireason))
+ if (blk_fs_request(rq) || blk_pc_request(rq)) {
+ if (ide_cd_check_ireason(drive, len, ireason, write))
return ide_stopped;
- xferfunc = HWIF(drive)->atapi_output_bytes;
- } else {
- /*
- * read from drive
- */
- if (cdrom_read_check_ireason(drive, len, ireason))
- return ide_stopped;
+ if (blk_fs_request(rq) && write == 0) {
+ int nskip;
+
+ if (ide_cd_check_transfer_size(drive, len)) {
+ cdrom_end_request(drive, 0);
+ return ide_stopped;
+ }
+ /*
+ * First, figure out if we need to bit-bucket
+ * any of the leading sectors.
+ */
+ nskip = min_t(int, rq->current_nr_sectors
+ - bio_cur_sectors(rq->bio),
+ thislen >> 9);
+ if (nskip > 0) {
+ ide_cd_drain_data(drive, nskip);
+ rq->current_nr_sectors -= nskip;
+ thislen -= (nskip << 9);
+ }
+ }
+ }
+
+ if (ireason == 0) {
+ write = 1;
+ xferfunc = HWIF(drive)->atapi_output_bytes;
+ } else if (ireason == 2 || (ireason == 1 &&
+ (blk_fs_request(rq) || blk_pc_request(rq)))) {
+ write = 0;
xferfunc = HWIF(drive)->atapi_input_bytes;
+ } else {
+ printk(KERN_ERR "%s: %s: The drive "
+ "appears confused (ireason = 0x%02x). "
+ "Trying to recover by ending request.\n",
+ drive->name, __FUNCTION__, ireason);
+ goto end_request;
}
/*
* transfer data
*/
while (thislen > 0) {
- int blen = blen = rq->data_len;
- char *ptr = rq->data;
+ u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
+ int blen = rq->data_len;
/*
* bio backed?
*/
if (rq->bio) {
- ptr = bio_data(rq->bio);
- blen = bio_iovec(rq->bio)->bv_len;
+ if (blk_fs_request(rq)) {
+ ptr = rq->buffer;
+ blen = rq->current_nr_sectors << 9;
+ } else {
+ ptr = bio_data(rq->bio);
+ blen = bio_iovec(rq->bio)->bv_len;
+ }
}
if (!ptr) {
- printk(KERN_ERR "%s: confused, missing data\n", drive->name);
+ if (blk_fs_request(rq) && !write)
+ /*
+ * If the buffers are full, cache the rest
+ * of the data in our internal buffer.
+ */
+ cdrom_buffer_sectors(drive, rq->sector,
+ thislen >> 9);
+ else {
+ printk(KERN_ERR "%s: confused, missing data\n",
+ drive->name);
+ blk_dump_rq_flags(rq, rq_data_dir(rq)
+ ? "cdrom_newpc_intr, write"
+ : "cdrom_newpc_intr, read");
+ }
break;
}
thislen -= blen;
len -= blen;
- rq->data_len -= blen;
- if (rq->bio)
+ if (blk_fs_request(rq)) {
+ rq->buffer += blen;
+ rq->nr_sectors -= (blen >> 9);
+ rq->current_nr_sectors -= (blen >> 9);
+ rq->sector += (blen >> 9);
+
+ if (rq->current_nr_sectors == 0 && rq->nr_sectors)
+ cdrom_end_request(drive, 1);
+ } else {
+ rq->data_len -= blen;
+
/*
* The request can't be completed until DRQ is cleared.
* So complete the data, but don't complete the request
* using the dummy function for the callback feature
* of blk_end_request_callback().
*/
- blk_end_request_callback(rq, 0, blen,
+ if (rq->bio)
+ blk_end_request_callback(rq, 0, blen,
cdrom_newpc_intr_dummy_cb);
- else
- rq->data += blen;
+ else
+ rq->data += blen;
+ }
}
+ if (write && blk_sense_request(rq))
+ rq->sense_len += thislen;
+
/*
* pad, if necessary
*/
- if (len > 0)
+ if (!blk_fs_request(rq) && len > 0)
ide_cd_pad_transfer(drive, xferfunc, len);
- ide_set_handler(drive, cdrom_newpc_intr, rq->timeout, NULL);
- return ide_started;
-}
-
-static ide_startstop_t cdrom_write_intr(ide_drive_t *drive)
-{
- int stat, ireason, len, sectors_to_transfer, uptodate;
- struct cdrom_info *info = drive->driver_data;
- int dma_error = 0, dma = info->dma;
- u8 lowcyl = 0, highcyl = 0;
-
- struct request *rq = HWGROUP(drive)->rq;
-
- /* Check for errors. */
- if (dma) {
- info->dma = 0;
- dma_error = HWIF(drive)->ide_dma_end(drive);
- if (dma_error) {
- printk(KERN_ERR "%s: DMA write error\n", drive->name);
- ide_dma_off(drive);
- }
+ if (blk_pc_request(rq)) {
+ timeout = rq->timeout;
+ } else {
+ timeout = ATAPI_WAIT_PC;
+ if (!blk_fs_request(rq))
+ expiry = cdrom_timer_expiry;
}
- if (cdrom_decode_status(drive, 0, &stat))
- return ide_stopped;
-
- /*
- * using dma, transfer is complete now
- */
- if (dma) {
- if (dma_error)
- return ide_error(drive, "dma error", stat);
-
- ide_end_request(drive, 1, rq->nr_sectors);
- return ide_stopped;
- }
+ ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
+ return ide_started;
- /* Read the interrupt reason and the transfer length. */
- ireason = HWIF(drive)->INB(IDE_IREASON_REG) & 0x3;
- lowcyl = HWIF(drive)->INB(IDE_BCOUNTL_REG);
- highcyl = HWIF(drive)->INB(IDE_BCOUNTH_REG);
+end_request:
+ if (blk_pc_request(rq)) {
+ unsigned long flags;
+ unsigned int dlen = rq->data_len;
- len = lowcyl + (256 * highcyl);
+ if (dma)
+ rq->data_len = 0;
- /* If DRQ is clear, the command has completed. */
- if ((stat & DRQ_STAT) == 0) {
- /* If we're not done writing, complain.
- * Otherwise, complete the command normally.
- */
- uptodate = 1;
- if (rq->current_nr_sectors > 0) {
- printk(KERN_ERR "%s: %s: data underrun (%d blocks)\n",
- drive->name, __FUNCTION__,
- rq->current_nr_sectors);
- uptodate = 0;
- }
+ spin_lock_irqsave(&ide_lock, flags);
+ if (__blk_end_request(rq, 0, dlen))
+ BUG();
+ HWGROUP(drive)->rq = NULL;
+ spin_unlock_irqrestore(&ide_lock, flags);
+ } else {
+ if (!uptodate)
+ rq->cmd_flags |= REQ_FAILED;
cdrom_end_request(drive, uptodate);
- return ide_stopped;
}
+ return ide_stopped;
+}
- /* Check that the drive is expecting to do the same thing we are. */
- if (cdrom_write_check_ireason(drive, len, ireason))
- return ide_stopped;
-
- sectors_to_transfer = len / SECTOR_SIZE;
-
- /*
- * now loop and write out the data
- */
- while (sectors_to_transfer > 0) {
- int this_transfer;
-
- if (!rq->current_nr_sectors) {
- printk(KERN_ERR "%s: %s: confused, missing data\n",
- drive->name, __FUNCTION__);
- break;
- }
+static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
+{
+ struct cdrom_info *cd = drive->driver_data;
+ int write = rq_data_dir(rq) == WRITE;
+ unsigned short sectors_per_frame =
+ queue_hardsect_size(drive->queue) >> SECTOR_BITS;
+ if (write) {
/*
- * Figure out how many sectors we can transfer
+ * disk has become write protected
*/
- this_transfer = min_t(int, sectors_to_transfer, rq->current_nr_sectors);
-
- while (this_transfer > 0) {
- HWIF(drive)->atapi_output_bytes(drive, rq->buffer, SECTOR_SIZE);
- rq->buffer += SECTOR_SIZE;
- --rq->nr_sectors;
- --rq->current_nr_sectors;
- ++rq->sector;
- --this_transfer;
- --sectors_to_transfer;
+ if (cd->disk->policy) {
+ cdrom_end_request(drive, 0);
+ return ide_stopped;
}
-
+ } else {
/*
- * current buffer complete, move on
+ * We may be retrying this request after an error. Fix up any
+ * weirdness which might be present in the request packet.
*/
- if (rq->current_nr_sectors == 0 && rq->nr_sectors)
- cdrom_end_request(drive, 1);
- }
+ restore_request(rq);
- /* re-arm handler */
- ide_set_handler(drive, &cdrom_write_intr, ATAPI_WAIT_PC, NULL);
- return ide_started;
-}
-
-static ide_startstop_t cdrom_start_write_cont(ide_drive_t *drive)
-{
- struct request *rq = HWGROUP(drive)->rq;
-
-#if 0 /* the immediate bit */
- rq->cmd[1] = 1 << 3;
-#endif
- rq->timeout = ATAPI_WAIT_PC;
-
- return cdrom_transfer_packet_command(drive, rq, cdrom_write_intr);
-}
-
-static ide_startstop_t cdrom_start_write(ide_drive_t *drive, struct request *rq)
-{
- struct cdrom_info *info = drive->driver_data;
- struct gendisk *g = info->disk;
- unsigned short sectors_per_frame = queue_hardsect_size(drive->queue) >> SECTOR_BITS;
+ /* Satisfy whatever we can of this request from our cache. */
+ if (cdrom_read_from_buffer(drive))
+ return ide_stopped;
+ }
/*
- * writes *must* be hardware frame aligned
+ * use DMA, if possible / writes *must* be hardware frame aligned
*/
if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
(rq->sector & (sectors_per_frame - 1))) {
- cdrom_end_request(drive, 0);
- return ide_stopped;
- }
-
- /*
- * disk has become write protected
- */
- if (g->policy) {
- cdrom_end_request(drive, 0);
- return ide_stopped;
- }
-
- info->nsectors_buffered = 0;
+ if (write) {
+ cdrom_end_request(drive, 0);
+ return ide_stopped;
+ }
+ cd->dma = 0;
+ } else
+ cd->dma = drive->using_dma;
- /* use dma, if possible. we don't need to check more, since we
- * know that the transfer is always (at least!) frame aligned */
- info->dma = drive->using_dma ? 1 : 0;
+ /* Clear the local sector buffer. */
+ cd->nsectors_buffered = 0;
- info->devinfo.media_written = 1;
+ if (write)
+ cd->devinfo.media_written = 1;
- /* Start sending the write request to the drive. */
- return cdrom_start_packet_command(drive, 32768, cdrom_start_write_cont);
+ /* Start sending the read/write request to the drive. */
+ return cdrom_start_packet_command(drive, 32768, cdrom_start_rw_cont);
}
static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive)
{
struct cdrom_info *info = drive->driver_data;
- rq->cmd_flags |= REQ_QUIET;
+ if (blk_pc_request(rq))
+ rq->cmd_flags |= REQ_QUIET;
+ else
+ rq->cmd_flags &= ~REQ_FAILED;
info->dma = 0;
if (blk_fs_request(rq)) {
if (info->cd_flags & IDE_CD_FLAG_SEEKING) {
unsigned long elapsed = jiffies - info->start_seek;
- int stat = HWIF(drive)->INB(IDE_STATUS_REG);
+ int stat = ide_read_status(drive);
if ((stat & SEEK_STAT) != SEEK_STAT) {
if (elapsed < IDECD_SEEK_TIMEOUT) {
}
if ((rq_data_dir(rq) == READ) && IDE_LARGE_SEEK(info->last_block, block, IDECD_SEEK_THRESHOLD) && drive->dsc_overlap) {
action = cdrom_start_seek(drive, block);
- } else {
- if (rq_data_dir(rq) == READ)
- action = cdrom_start_read(drive, block);
- else
- action = cdrom_start_write(drive, rq);
- }
+ } else
+ action = cdrom_start_rw(drive, rq);
info->last_block = block;
return action;
- } else if (rq->cmd_type == REQ_TYPE_SENSE ||
+ } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
rq->cmd_type == REQ_TYPE_ATA_PC) {
- return cdrom_do_packet_command(drive);
- } else if (blk_pc_request(rq)) {
return cdrom_do_block_pc(drive, rq);
} else if (blk_special_request(rq)) {
/*
msf->frame = BCD2BIN(msf->frame);
}
-static int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
+int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
{
struct request req;
struct cdrom_info *info = drive->driver_data;
return ide_cd_queue_pc(drive, &req);
}
-/* Lock the door if LOCKFLAG is nonzero; unlock it otherwise. */
-int ide_cd_lockdoor(ide_drive_t *drive, int lockflag,
- struct request_sense *sense)
-{
- struct cdrom_info *cd = drive->driver_data;
- struct request_sense my_sense;
- struct request req;
- int stat;
-
- if (sense == NULL)
- sense = &my_sense;
-
- /* If the drive cannot lock the door, just pretend. */
- if (cd->cd_flags & IDE_CD_FLAG_NO_DOORLOCK) {
- stat = 0;
- } else {
- ide_cd_init_rq(drive, &req);
- req.sense = sense;
- req.cmd[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
- req.cmd[4] = lockflag ? 1 : 0;
- stat = ide_cd_queue_pc(drive, &req);
- }
-
- /* If we got an illegal field error, the drive
- probably cannot lock the door. */
- if (stat != 0 &&
- sense->sense_key == ILLEGAL_REQUEST &&
- (sense->asc == 0x24 || sense->asc == 0x20)) {
- printk (KERN_ERR "%s: door locking not supported\n",
- drive->name);
- cd->cd_flags |= IDE_CD_FLAG_NO_DOORLOCK;
- stat = 0;
- }
-
- /* no medium, that's alright. */
- if (stat != 0 && sense->sense_key == NOT_READY && sense->asc == 0x3a)
- stat = 0;
-
- if (stat == 0) {
- if (lockflag)
- cd->cd_flags |= IDE_CD_FLAG_DOOR_LOCKED;
- else
- cd->cd_flags &= ~IDE_CD_FLAG_DOOR_LOCKED;
- }
-
- return stat;
-}
-
-
-/* Eject the disk if EJECTFLAG is 0.
- If EJECTFLAG is 1, try to reload the disk. */
-static int cdrom_eject(ide_drive_t *drive, int ejectflag,
- struct request_sense *sense)
-{
- struct cdrom_info *cd = drive->driver_data;
- struct cdrom_device_info *cdi = &cd->devinfo;
- struct request req;
- char loej = 0x02;
-
- if ((cd->cd_flags & IDE_CD_FLAG_NO_EJECT) && !ejectflag)
- return -EDRIVE_CANT_DO_THIS;
-
- /* reload fails on some drives, if the tray is locked */
- if ((cd->cd_flags & IDE_CD_FLAG_DOOR_LOCKED) && ejectflag)
- return 0;
-
- ide_cd_init_rq(drive, &req);
-
- /* only tell drive to close tray if open, if it can do that */
- if (ejectflag && (cdi->mask & CDC_CLOSE_TRAY))
- loej = 0;
-
- req.sense = sense;
- req.cmd[0] = GPCMD_START_STOP_UNIT;
- req.cmd[4] = loej | (ejectflag != 0);
-
- return ide_cd_queue_pc(drive, &req);
-}
-
static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
unsigned long *sectors_per_frame,
struct request_sense *sense)
if (stat)
return stat;
- toc->hdr.toc_length = ntohs (toc->hdr.toc_length);
+ toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
toc->hdr.first_track = BCD2BIN(toc->hdr.first_track);
return 0;
}
-/* the generic packet interface to cdrom.c */
-static int ide_cdrom_packet(struct cdrom_device_info *cdi,
- struct packet_command *cgc)
-{
- struct request req;
- ide_drive_t *drive = cdi->handle;
-
- if (cgc->timeout <= 0)
- cgc->timeout = ATAPI_WAIT_PC;
-
- /* here we queue the commands from the uniform CD-ROM
- layer. the packet must be complete, as we do not
- touch it at all. */
- ide_cd_init_rq(drive, &req);
- memcpy(req.cmd, cgc->cmd, CDROM_PACKET_SIZE);
- if (cgc->sense)
- memset(cgc->sense, 0, sizeof(struct request_sense));
- req.data = cgc->buffer;
- req.data_len = cgc->buflen;
- req.timeout = cgc->timeout;
-
- if (cgc->quiet)
- req.cmd_flags |= REQ_QUIET;
-
- req.sense = cgc->sense;
- cgc->stat = ide_cd_queue_pc(drive, &req);
- if (!cgc->stat)
- cgc->buflen -= req.data_len;
- return cgc->stat;
-}
-
-static
-int ide_cdrom_tray_move (struct cdrom_device_info *cdi, int position)
-{
- ide_drive_t *drive = cdi->handle;
- struct request_sense sense;
-
- if (position) {
- int stat = ide_cd_lockdoor(drive, 0, &sense);
-
- if (stat)
- return stat;
- }
-
- return cdrom_eject(drive, !position, &sense);
-}
-
int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
{
struct cdrom_info *info = drive->driver_data;
cd->max_speed = (maxspeed + (176/2)) / 176;
}
-/*
- * add logic to try GET_EVENT command first to check for media and tray
- * status. this should be supported by newer cd-r/w and all DVD etc
- * drives
- */
-static
-int ide_cdrom_drive_status (struct cdrom_device_info *cdi, int slot_nr)
-{
- ide_drive_t *drive = cdi->handle;
- struct media_event_desc med;
- struct request_sense sense;
- int stat;
-
- if (slot_nr != CDSL_CURRENT)
- return -EINVAL;
-
- stat = cdrom_check_status(drive, &sense);
- if (!stat || sense.sense_key == UNIT_ATTENTION)
- return CDS_DISC_OK;
-
- if (!cdrom_get_media_event(cdi, &med)) {
- if (med.media_present)
- return CDS_DISC_OK;
- else if (med.door_open)
- return CDS_TRAY_OPEN;
- else
- return CDS_NO_DISC;
- }
-
- if (sense.sense_key == NOT_READY && sense.asc == 0x04 && sense.ascq == 0x04)
- return CDS_DISC_OK;
-
- /*
- * If not using Mt Fuji extended media tray reports,
- * just return TRAY_OPEN since ATAPI doesn't provide
- * any other way to detect this...
- */
- if (sense.sense_key == NOT_READY) {
- if (sense.asc == 0x3a && sense.ascq == 1)
- return CDS_NO_DISC;
- else
- return CDS_TRAY_OPEN;
- }
- return CDS_DRIVE_NOT_READY;
-}
-
-/****************************************************************************
- * Other driver requests (open, close, check media change).
- */
-
-static
-int ide_cdrom_check_media_change_real (struct cdrom_device_info *cdi,
- int slot_nr)
-{
- ide_drive_t *drive = cdi->handle;
- struct cdrom_info *cd = drive->driver_data;
- int retval;
-
- if (slot_nr == CDSL_CURRENT) {
- (void) cdrom_check_status(drive, NULL);
- retval = (cd->cd_flags & IDE_CD_FLAG_MEDIA_CHANGED) ? 1 : 0;
- cd->cd_flags &= ~IDE_CD_FLAG_MEDIA_CHANGED;
- return retval;
- } else {
- return -EINVAL;
- }
-}
-
-
-static
-int ide_cdrom_open_real (struct cdrom_device_info *cdi, int purpose)
-{
- return 0;
-}
-
-/*
- * Close down the device. Invalidate all cached blocks.
- */
-
-static
-void ide_cdrom_release_real (struct cdrom_device_info *cdi)
-{
- ide_drive_t *drive = cdi->handle;
- struct cdrom_info *cd = drive->driver_data;
-
- if (!cdi->use_count)
- cd->cd_flags &= ~IDE_CD_FLAG_TOC_VALID;
-}
-
#define IDE_CD_CAPABILITIES \
(CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
git.samba.org / sfrench / cifs-2.6.git / blobdiff