#include <linux/module.h>
#include <linux/fs.h>
#include <linux/kernel.h>
-#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/bio.h>
#include <linux/string.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/blkdev.h>
+#include <linux/mutex.h>
#include <asm/uaccess.h>
#include <scsi/scsi.h>
#include "sr.h"
+MODULE_DESCRIPTION("SCSI cdrom (sr) driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_CDROM_MAJOR);
+MODULE_ALIAS_SCSI_DEVICE(TYPE_ROM);
+MODULE_ALIAS_SCSI_DEVICE(TYPE_WORM);
+
#define SR_DISKS 256
#define MAX_RETRIES 3
#define SR_CAPABILITIES \
(CDC_CLOSE_TRAY|CDC_OPEN_TRAY|CDC_LOCK|CDC_SELECT_SPEED| \
CDC_SELECT_DISC|CDC_MULTI_SESSION|CDC_MCN|CDC_MEDIA_CHANGED| \
- CDC_PLAY_AUDIO|CDC_RESET|CDC_IOCTLS|CDC_DRIVE_STATUS| \
+ CDC_PLAY_AUDIO|CDC_RESET|CDC_DRIVE_STATUS| \
CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_DVD_RAM|CDC_GENERIC_PACKET| \
CDC_MRW|CDC_MRW_W|CDC_RAM)
static int sr_probe(struct device *);
static int sr_remove(struct device *);
-static int sr_init_command(struct scsi_cmnd *);
static struct scsi_driver sr_template = {
.owner = THIS_MODULE,
.probe = sr_probe,
.remove = sr_remove,
},
- .init_command = sr_init_command,
};
static unsigned long sr_index_bits[SR_DISKS / BITS_PER_LONG];
/* This semaphore is used to mediate the 0->1 reference get in the
* face of object destruction (i.e. we can't allow a get on an
* object after last put) */
-static DECLARE_MUTEX(sr_ref_sem);
+static DEFINE_MUTEX(sr_ref_mutex);
static int sr_open(struct cdrom_device_info *, int);
static void sr_release(struct cdrom_device_info *);
.get_mcn = sr_get_mcn,
.reset = sr_reset,
.audio_ioctl = sr_audio_ioctl,
- .dev_ioctl = sr_dev_ioctl,
.capability = SR_CAPABILITIES,
.generic_packet = sr_packet,
};
{
struct scsi_cd *cd = NULL;
- down(&sr_ref_sem);
+ mutex_lock(&sr_ref_mutex);
if (disk->private_data == NULL)
goto out;
cd = scsi_cd(disk);
kref_put(&cd->kref, sr_kref_release);
cd = NULL;
out:
- up(&sr_ref_sem);
+ mutex_unlock(&sr_ref_mutex);
return cd;
}
-static inline void scsi_cd_put(struct scsi_cd *cd)
+static void scsi_cd_put(struct scsi_cd *cd)
{
struct scsi_device *sdev = cd->device;
- down(&sr_ref_sem);
+ mutex_lock(&sr_ref_mutex);
kref_put(&cd->kref, sr_kref_release);
scsi_device_put(sdev);
- up(&sr_ref_sem);
+ mutex_unlock(&sr_ref_mutex);
}
/*
* an inode for that to work, and we do not always have one.
*/
-int sr_media_change(struct cdrom_device_info *cdi, int slot)
+static int sr_media_change(struct cdrom_device_info *cdi, int slot)
{
struct scsi_cd *cd = cdi->handle;
int retval;
static void rw_intr(struct scsi_cmnd * SCpnt)
{
int result = SCpnt->result;
- int this_count = SCpnt->bufflen;
+ int this_count = SCpnt->request_bufflen;
int good_bytes = (result == 0 ? this_count : 0);
int block_sectors = 0;
long error_sector;
case ILLEGAL_REQUEST:
if (!(SCpnt->sense_buffer[0] & 0x90))
break;
- if (!blk_fs_request(SCpnt->request))
- break;
error_sector = (SCpnt->sense_buffer[3] << 24) |
(SCpnt->sense_buffer[4] << 16) |
(SCpnt->sense_buffer[5] << 8) |
* how many actual sectors finished, and how many sectors we need
* to say have failed.
*/
- scsi_io_completion(SCpnt, good_bytes, block_sectors << 9);
+ scsi_io_completion(SCpnt, good_bytes);
}
-static int sr_init_command(struct scsi_cmnd * SCpnt)
+static int sr_prep_fn(struct request_queue *q, struct request *rq)
{
int block=0, this_count, s_size, timeout = SR_TIMEOUT;
- struct scsi_cd *cd = scsi_cd(SCpnt->request->rq_disk);
+ struct scsi_cd *cd;
+ struct scsi_cmnd *SCpnt;
+ struct scsi_device *sdp = q->queuedata;
+ int ret;
+
+ if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
+ ret = scsi_setup_blk_pc_cmnd(sdp, rq);
+ goto out;
+ } else if (rq->cmd_type != REQ_TYPE_FS) {
+ ret = BLKPREP_KILL;
+ goto out;
+ }
+ ret = scsi_setup_fs_cmnd(sdp, rq);
+ if (ret != BLKPREP_OK)
+ goto out;
+ SCpnt = rq->special;
+ cd = scsi_cd(rq->rq_disk);
+
+ /* from here on until we're complete, any goto out
+ * is used for a killable error condition */
+ ret = BLKPREP_KILL;
SCSI_LOG_HLQUEUE(1, printk("Doing sr request, dev = %s, block = %d\n",
cd->disk->disk_name, block));
if (!cd->device || !scsi_device_online(cd->device)) {
SCSI_LOG_HLQUEUE(2, printk("Finishing %ld sectors\n",
- SCpnt->request->nr_sectors));
+ rq->nr_sectors));
SCSI_LOG_HLQUEUE(2, printk("Retry with 0x%p\n", SCpnt));
- return 0;
+ goto out;
}
if (cd->device->changed) {
* quietly refuse to do anything to a changed disc until the
* changed bit has been reset
*/
- return 0;
- }
-
- /*
- * these are already setup, just copy cdb basically
- */
- if (SCpnt->request->flags & REQ_BLOCK_PC) {
- struct request *rq = SCpnt->request;
-
- if (sizeof(rq->cmd) > sizeof(SCpnt->cmnd))
- return 0;
-
- memcpy(SCpnt->cmnd, rq->cmd, sizeof(SCpnt->cmnd));
- SCpnt->cmd_len = rq->cmd_len;
- if (!rq->data_len)
- SCpnt->sc_data_direction = DMA_NONE;
- else if (rq_data_dir(rq) == WRITE)
- SCpnt->sc_data_direction = DMA_TO_DEVICE;
- else
- SCpnt->sc_data_direction = DMA_FROM_DEVICE;
-
- this_count = rq->data_len;
- if (rq->timeout)
- timeout = rq->timeout;
-
- SCpnt->transfersize = rq->data_len;
- goto queue;
- }
-
- if (!(SCpnt->request->flags & REQ_CMD)) {
- blk_dump_rq_flags(SCpnt->request, "sr unsup command");
- return 0;
+ goto out;
}
/*
}
if (s_size != 512 && s_size != 1024 && s_size != 2048) {
- sdev_printk(KERN_ERR, SCpnt->device, "bad sector size %d\n", s_size);
- return 0;
+ scmd_printk(KERN_ERR, SCpnt, "bad sector size %d\n", s_size);
+ goto out;
}
- if (rq_data_dir(SCpnt->request) == WRITE) {
+ if (rq_data_dir(rq) == WRITE) {
if (!cd->device->writeable)
- return 0;
+ goto out;
SCpnt->cmnd[0] = WRITE_10;
SCpnt->sc_data_direction = DMA_TO_DEVICE;
cd->cdi.media_written = 1;
- } else if (rq_data_dir(SCpnt->request) == READ) {
+ } else if (rq_data_dir(rq) == READ) {
SCpnt->cmnd[0] = READ_10;
SCpnt->sc_data_direction = DMA_FROM_DEVICE;
} else {
- blk_dump_rq_flags(SCpnt->request, "Unknown sr command");
- return 0;
+ blk_dump_rq_flags(rq, "Unknown sr command");
+ goto out;
}
{
size += sg[i].length;
if (size != SCpnt->request_bufflen && SCpnt->use_sg) {
- sdev_printk(KERN_ERR, SCpnt->device,
- "mismatch count %d, bytes %d\n",
- size, SCpnt->request_bufflen);
+ scmd_printk(KERN_ERR, SCpnt,
+ "mismatch count %d, bytes %d\n",
+ size, SCpnt->request_bufflen);
if (SCpnt->request_bufflen > size)
- SCpnt->request_bufflen = SCpnt->bufflen = size;
+ SCpnt->request_bufflen = size;
}
}
/*
* request doesn't start on hw block boundary, add scatter pads
*/
- if (((unsigned int)SCpnt->request->sector % (s_size >> 9)) ||
+ if (((unsigned int)rq->sector % (s_size >> 9)) ||
(SCpnt->request_bufflen % s_size)) {
- sdev_printk(KERN_NOTICE, SCpnt->device, "unaligned transfer\n");
- return 0;
+ scmd_printk(KERN_NOTICE, SCpnt, "unaligned transfer\n");
+ goto out;
}
this_count = (SCpnt->request_bufflen >> 9) / (s_size >> 9);
SCSI_LOG_HLQUEUE(2, printk("%s : %s %d/%ld 512 byte blocks.\n",
cd->cdi.name,
- (rq_data_dir(SCpnt->request) == WRITE) ?
+ (rq_data_dir(rq) == WRITE) ?
"writing" : "reading",
- this_count, SCpnt->request->nr_sectors));
+ this_count, rq->nr_sectors));
SCpnt->cmnd[1] = 0;
- block = (unsigned int)SCpnt->request->sector / (s_size >> 9);
+ block = (unsigned int)rq->sector / (s_size >> 9);
if (this_count > 0xffff) {
this_count = 0xffff;
- SCpnt->request_bufflen = SCpnt->bufflen =
- this_count * s_size;
+ SCpnt->request_bufflen = this_count * s_size;
}
SCpnt->cmnd[2] = (unsigned char) (block >> 24) & 0xff;
*/
SCpnt->transfersize = cd->device->sector_size;
SCpnt->underflow = this_count << 9;
-
-queue:
SCpnt->allowed = MAX_RETRIES;
SCpnt->timeout_per_command = timeout;
* This indicates that the command is ready from our end to be
* queued.
*/
- return 1;
+ ret = BLKPREP_OK;
+ out:
+ return scsi_prep_return(q, rq, ret);
}
static int sr_block_open(struct inode *inode, struct file *file)
{
struct gendisk *disk = inode->i_bdev->bd_disk;
- struct scsi_cd *cd = scsi_cd(inode->i_bdev->bd_disk);
+ struct scsi_cd *cd;
int ret = 0;
if(!(cd = scsi_cd_get(disk)))
{
struct scsi_cd *cd = scsi_cd(inode->i_bdev->bd_disk);
struct scsi_device *sdev = cd->device;
+ void __user *argp = (void __user *)arg;
+ int ret;
- /*
- * Send SCSI addressing ioctls directly to mid level, send other
- * ioctls to cdrom/block level.
- */
- switch (cmd) {
- case SCSI_IOCTL_GET_IDLUN:
- case SCSI_IOCTL_GET_BUS_NUMBER:
- return scsi_ioctl(sdev, cmd, (void __user *)arg);
+ /*
+ * Send SCSI addressing ioctls directly to mid level, send other
+ * ioctls to cdrom/block level.
+ */
+ switch (cmd) {
+ case SCSI_IOCTL_GET_IDLUN:
+ case SCSI_IOCTL_GET_BUS_NUMBER:
+ return scsi_ioctl(sdev, cmd, argp);
}
- return cdrom_ioctl(file, &cd->cdi, inode, cmd, arg);
+
+ ret = cdrom_ioctl(file, &cd->cdi, inode, cmd, arg);
+ if (ret != -ENOSYS)
+ return ret;
+
+ /*
+ * ENODEV means that we didn't recognise the ioctl, or that we
+ * cannot execute it in the current device state. In either
+ * case fall through to scsi_ioctl, which will return ENDOEV again
+ * if it doesn't recognise the ioctl
+ */
+ ret = scsi_nonblockable_ioctl(sdev, cmd, argp, NULL);
+ if (ret != -ENODEV)
+ return ret;
+ return scsi_ioctl(sdev, cmd, argp);
}
static int sr_block_media_changed(struct gendisk *disk)
goto fail;
error = -ENOMEM;
- cd = kmalloc(sizeof(*cd), GFP_KERNEL);
+ cd = kzalloc(sizeof(*cd), GFP_KERNEL);
if (!cd)
goto fail;
- memset(cd, 0, sizeof(*cd));
kref_init(&cd->kref);
/* FIXME: need to handle a get_capabilities failure properly ?? */
get_capabilities(cd);
+ blk_queue_prep_rq(sdev->request_queue, sr_prep_fn);
sr_vendor_init(cd);
- snprintf(disk->devfs_name, sizeof(disk->devfs_name),
- "%s/cd", sdev->devfs_name);
disk->driverfs_dev = &sdev->sdev_gendev;
set_capacity(disk, cd->capacity);
disk->private_data = &cd->driver;
unsigned char *buffer;
int the_result, retries = 3;
int sector_size;
- request_queue_t *queue;
+ struct request_queue *queue;
buffer = kmalloc(512, GFP_KERNEL | GFP_DMA);
if (!buffer)
unsigned int the_result;
int retries, rc, n;
- static char *loadmech[] =
+ static const char *loadmech[] =
{
"caddy",
"tray",
/* failed, drive doesn't have capabilities mode page */
cd->cdi.speed = 1;
cd->cdi.mask |= (CDC_CD_R | CDC_CD_RW | CDC_DVD_R |
- CDC_DVD | CDC_DVD_RAM |
- CDC_SELECT_DISC | CDC_SELECT_SPEED);
+ CDC_DVD | CDC_DVD_RAM |
+ CDC_SELECT_DISC | CDC_SELECT_SPEED |
+ CDC_MRW | CDC_MRW_W | CDC_RAM);
kfree(buffer);
printk("%s: scsi-1 drive\n", cd->cdi.name);
return;
* sr_kref_release - Called to free the scsi_cd structure
* @kref: pointer to embedded kref
*
- * sr_ref_sem must be held entering this routine. Because it is
+ * sr_ref_mutex must be held entering this routine. Because it is
* called on last put, you should always use the scsi_cd_get()
* scsi_cd_put() helpers which manipulate the semaphore directly
* and never do a direct kref_put().
del_gendisk(cd->disk);
- down(&sr_ref_sem);
+ mutex_lock(&sr_ref_mutex);
kref_put(&cd->kref, sr_kref_release);
- up(&sr_ref_sem);
+ mutex_unlock(&sr_ref_mutex);
return 0;
}
rc = register_blkdev(SCSI_CDROM_MAJOR, "sr");
if (rc)
return rc;
- return scsi_register_driver(&sr_template.gendrv);
+ rc = scsi_register_driver(&sr_template.gendrv);
+ if (rc)
+ unregister_blkdev(SCSI_CDROM_MAJOR, "sr");
+
+ return rc;
}
static void __exit exit_sr(void)
Code Review / linux-2.6.git / blobdiff