* than the level indicated above to trigger output.
*/
-#include <linux/config.h>
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/genhd.h>
#include <linux/hdreg.h>
#include <linux/errno.h>
+#include <linux/idr.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/blkdev.h>
#include <linux/blkpg.h>
-#include <linux/kref.h>
+#include <linux/delay.h>
+#include <linux/mutex.h>
#include <asm/uaccess.h>
#include <scsi/scsi.h>
#include <scsi/scsi_eh.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_ioctl.h>
-#include <scsi/scsi_request.h>
#include <scsi/scsicam.h>
#include "scsi_logging.h"
-
/*
- * Remaining dev_t-handling stuff
+ * More than enough for everybody ;) The huge number of majors
+ * is a leftover from 16bit dev_t days, we don't really need that
+ * much numberspace.
*/
#define SD_MAJORS 16
-#define SD_DISKS 32768 /* anything between 256 and 262144 */
+
+MODULE_AUTHOR("Eric Youngdale");
+MODULE_DESCRIPTION("SCSI disk (sd) driver");
+MODULE_LICENSE("GPL");
+
+MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR);
+MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR);
+MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR);
+MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR);
+MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR);
+MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR);
+MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR);
+MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR);
+MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR);
+MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR);
+MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR);
+MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR);
+MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR);
+MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR);
+MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR);
+MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR);
+
+/*
+ * This is limited by the naming scheme enforced in sd_probe,
+ * add another character to it if you really need more disks.
+ */
+#define SD_MAX_DISKS (((26 * 26) + 26 + 1) * 26)
/*
* Time out in seconds for disks and Magneto-opticals (which are slower).
* Number of allowed retries
*/
#define SD_MAX_RETRIES 5
+#define SD_PASSTHROUGH_RETRIES 1
-static void scsi_disk_release(struct kref *kref);
+/*
+ * Size of the initial data buffer for mode and read capacity data
+ */
+#define SD_BUF_SIZE 512
struct scsi_disk {
struct scsi_driver *driver; /* always &sd_template */
struct scsi_device *device;
- struct kref kref;
+ struct class_device cdev;
struct gendisk *disk;
unsigned int openers; /* protected by BKL for now, yuck */
sector_t capacity; /* size in 512-byte sectors */
u8 write_prot;
unsigned WCE : 1; /* state of disk WCE bit */
unsigned RCD : 1; /* state of disk RCD bit, unused */
+ unsigned DPOFUA : 1; /* state of disk DPOFUA bit */
};
+#define to_scsi_disk(obj) container_of(obj,struct scsi_disk,cdev)
-
-static unsigned long sd_index_bits[SD_DISKS / BITS_PER_LONG];
-static spinlock_t sd_index_lock = SPIN_LOCK_UNLOCKED;
+static DEFINE_IDR(sd_index_idr);
+static DEFINE_SPINLOCK(sd_index_lock);
/* 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(sd_ref_sem);
+static DEFINE_MUTEX(sd_ref_mutex);
static int sd_revalidate_disk(struct gendisk *disk);
static void sd_rw_intr(struct scsi_cmnd * SCpnt);
static void sd_shutdown(struct device *dev);
static void sd_rescan(struct device *);
static int sd_init_command(struct scsi_cmnd *);
+static int sd_issue_flush(struct device *, sector_t *);
+static void sd_prepare_flush(request_queue_t *, struct request *);
static void sd_read_capacity(struct scsi_disk *sdkp, char *diskname,
- struct scsi_request *SRpnt, unsigned char *buffer);
+ unsigned char *buffer);
+static void scsi_disk_release(struct class_device *cdev);
+
+static const char *sd_cache_types[] = {
+ "write through", "none", "write back",
+ "write back, no read (daft)"
+};
+
+static ssize_t sd_store_cache_type(struct class_device *cdev, const char *buf,
+ size_t count)
+{
+ int i, ct = -1, rcd, wce, sp;
+ struct scsi_disk *sdkp = to_scsi_disk(cdev);
+ struct scsi_device *sdp = sdkp->device;
+ char buffer[64];
+ char *buffer_data;
+ struct scsi_mode_data data;
+ struct scsi_sense_hdr sshdr;
+ int len;
+
+ if (sdp->type != TYPE_DISK)
+ /* no cache control on RBC devices; theoretically they
+ * can do it, but there's probably so many exceptions
+ * it's not worth the risk */
+ return -EINVAL;
+
+ for (i = 0; i < ARRAY_SIZE(sd_cache_types); i++) {
+ const int len = strlen(sd_cache_types[i]);
+ if (strncmp(sd_cache_types[i], buf, len) == 0 &&
+ buf[len] == '\n') {
+ ct = i;
+ break;
+ }
+ }
+ if (ct < 0)
+ return -EINVAL;
+ rcd = ct & 0x01 ? 1 : 0;
+ wce = ct & 0x02 ? 1 : 0;
+ if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT,
+ SD_MAX_RETRIES, &data, NULL))
+ return -EINVAL;
+ len = min_t(size_t, sizeof(buffer), data.length - data.header_length -
+ data.block_descriptor_length);
+ buffer_data = buffer + data.header_length +
+ data.block_descriptor_length;
+ buffer_data[2] &= ~0x05;
+ buffer_data[2] |= wce << 2 | rcd;
+ sp = buffer_data[0] & 0x80 ? 1 : 0;
+
+ if (scsi_mode_select(sdp, 1, sp, 8, buffer_data, len, SD_TIMEOUT,
+ SD_MAX_RETRIES, &data, &sshdr)) {
+ if (scsi_sense_valid(&sshdr))
+ scsi_print_sense_hdr(sdkp->disk->disk_name, &sshdr);
+ return -EINVAL;
+ }
+ sd_revalidate_disk(sdkp->disk);
+ return count;
+}
+
+static ssize_t sd_store_allow_restart(struct class_device *cdev, const char *buf,
+ size_t count)
+{
+ struct scsi_disk *sdkp = to_scsi_disk(cdev);
+ struct scsi_device *sdp = sdkp->device;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+
+ if (sdp->type != TYPE_DISK)
+ return -EINVAL;
+
+ sdp->allow_restart = simple_strtoul(buf, NULL, 10);
+
+ return count;
+}
+
+static ssize_t sd_show_cache_type(struct class_device *cdev, char *buf)
+{
+ struct scsi_disk *sdkp = to_scsi_disk(cdev);
+ int ct = sdkp->RCD + 2*sdkp->WCE;
+
+ return snprintf(buf, 40, "%s\n", sd_cache_types[ct]);
+}
+
+static ssize_t sd_show_fua(struct class_device *cdev, char *buf)
+{
+ struct scsi_disk *sdkp = to_scsi_disk(cdev);
+
+ return snprintf(buf, 20, "%u\n", sdkp->DPOFUA);
+}
+
+static ssize_t sd_show_allow_restart(struct class_device *cdev, char *buf)
+{
+ struct scsi_disk *sdkp = to_scsi_disk(cdev);
+
+ return snprintf(buf, 40, "%d\n", sdkp->device->allow_restart);
+}
+
+static struct class_device_attribute sd_disk_attrs[] = {
+ __ATTR(cache_type, S_IRUGO|S_IWUSR, sd_show_cache_type,
+ sd_store_cache_type),
+ __ATTR(FUA, S_IRUGO, sd_show_fua, NULL),
+ __ATTR(allow_restart, S_IRUGO|S_IWUSR, sd_show_allow_restart,
+ sd_store_allow_restart),
+ __ATTR_NULL,
+};
+
+static struct class sd_disk_class = {
+ .name = "scsi_disk",
+ .owner = THIS_MODULE,
+ .release = scsi_disk_release,
+ .class_dev_attrs = sd_disk_attrs,
+};
static struct scsi_driver sd_template = {
.owner = THIS_MODULE,
},
.rescan = sd_rescan,
.init_command = sd_init_command,
+ .issue_flush = sd_issue_flush,
};
-/* Device no to disk mapping:
+/*
+ * Device no to disk mapping:
*
* major disc2 disc p1
* |............|.............|....|....| <- dev_t
* As we stay compatible with our numbering scheme, we can reuse
* the well-know SCSI majors 8, 65--71, 136--143.
*/
-
static int sd_major(int major_idx)
{
switch (major_idx) {
}
}
-static unsigned int make_sd_dev(unsigned int sd_nr, unsigned int part)
+static inline struct scsi_disk *scsi_disk(struct gendisk *disk)
{
- return (part & 0xf) | ((sd_nr & 0xf) << 4) |
- (sd_major((sd_nr & 0xf0) >> 4) << 20) | (sd_nr & 0xfff00);
+ return container_of(disk->private_data, struct scsi_disk, driver);
}
-/* reverse mapping dev -> (sd_nr, part) not currently needed */
-
-#define to_scsi_disk(obj) container_of(obj,struct scsi_disk,kref)
-
-static inline struct scsi_disk *scsi_disk(struct gendisk *disk)
+static struct scsi_disk *__scsi_disk_get(struct gendisk *disk)
{
- return container_of(disk->private_data, struct scsi_disk, driver);
+ struct scsi_disk *sdkp = NULL;
+
+ if (disk->private_data) {
+ sdkp = scsi_disk(disk);
+ if (scsi_device_get(sdkp->device) == 0)
+ class_device_get(&sdkp->cdev);
+ else
+ sdkp = NULL;
+ }
+ return sdkp;
}
static struct scsi_disk *scsi_disk_get(struct gendisk *disk)
{
- struct scsi_disk *sdkp = NULL;
+ struct scsi_disk *sdkp;
- down(&sd_ref_sem);
- if (disk->private_data == NULL)
- goto out;
- sdkp = scsi_disk(disk);
- if (!kref_get(&sdkp->kref))
- goto out_sdkp;
- if (scsi_device_get(sdkp->device))
- goto out_put;
- up(&sd_ref_sem);
+ mutex_lock(&sd_ref_mutex);
+ sdkp = __scsi_disk_get(disk);
+ mutex_unlock(&sd_ref_mutex);
return sdkp;
+}
- out_put:
- kref_put(&sdkp->kref);
- out_sdkp:
- sdkp = NULL;
- out:
- up(&sd_ref_sem);
+static struct scsi_disk *scsi_disk_get_from_dev(struct device *dev)
+{
+ struct scsi_disk *sdkp;
+
+ mutex_lock(&sd_ref_mutex);
+ sdkp = dev_get_drvdata(dev);
+ if (sdkp)
+ sdkp = __scsi_disk_get(sdkp->disk);
+ mutex_unlock(&sd_ref_mutex);
return sdkp;
}
static void scsi_disk_put(struct scsi_disk *sdkp)
{
- down(&sd_ref_sem);
- scsi_device_put(sdkp->device);
- kref_put(&sdkp->kref);
- up(&sd_ref_sem);
+ struct scsi_device *sdev = sdkp->device;
+
+ mutex_lock(&sd_ref_mutex);
+ class_device_put(&sdkp->cdev);
+ scsi_device_put(sdev);
+ mutex_unlock(&sd_ref_mutex);
}
/**
**/
static int sd_init_command(struct scsi_cmnd * SCpnt)
{
- unsigned int this_count, timeout;
- struct gendisk *disk;
- sector_t block;
struct scsi_device *sdp = SCpnt->device;
-
- timeout = sdp->timeout;
-
- /*
- * 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));
- if (rq_data_dir(rq) == WRITE)
- SCpnt->sc_data_direction = DMA_TO_DEVICE;
- else if (rq->data_len)
- SCpnt->sc_data_direction = DMA_FROM_DEVICE;
- else
- SCpnt->sc_data_direction = DMA_NONE;
-
- this_count = rq->data_len;
- if (rq->timeout)
- timeout = rq->timeout;
-
- SCpnt->transfersize = rq->data_len;
- goto queue;
- }
-
- /*
- * we only do REQ_CMD and REQ_BLOCK_PC
- */
- if (!(SCpnt->request->flags & REQ_CMD))
- return 0;
-
- disk = SCpnt->request->rq_disk;
- block = SCpnt->request->sector;
- this_count = SCpnt->request_bufflen >> 9;
+ struct request *rq = SCpnt->request;
+ struct gendisk *disk = rq->rq_disk;
+ sector_t block = rq->sector;
+ unsigned int this_count = SCpnt->request_bufflen >> 9;
+ unsigned int timeout = sdp->timeout;
SCSI_LOG_HLQUEUE(1, printk("sd_init_command: disk=%s, block=%llu, "
- "count=%d\n", disk->disk_name, (unsigned long long)block, this_count));
+ "count=%d\n", disk->disk_name,
+ (unsigned long long)block, this_count));
if (!sdp || !scsi_device_online(sdp) ||
- block + SCpnt->request->nr_sectors > get_capacity(disk)) {
+ block + rq->nr_sectors > get_capacity(disk)) {
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;
}
* for this.
*/
if (sdp->sector_size == 1024) {
- if ((block & 1) || (SCpnt->request->nr_sectors & 1)) {
+ if ((block & 1) || (rq->nr_sectors & 1)) {
printk(KERN_ERR "sd: Bad block number requested");
return 0;
} else {
}
}
if (sdp->sector_size == 2048) {
- if ((block & 3) || (SCpnt->request->nr_sectors & 3)) {
+ if ((block & 3) || (rq->nr_sectors & 3)) {
printk(KERN_ERR "sd: Bad block number requested");
return 0;
} else {
}
}
if (sdp->sector_size == 4096) {
- if ((block & 7) || (SCpnt->request->nr_sectors & 7)) {
+ if ((block & 7) || (rq->nr_sectors & 7)) {
printk(KERN_ERR "sd: Bad block number requested");
return 0;
} else {
this_count = this_count >> 3;
}
}
- if (rq_data_dir(SCpnt->request) == WRITE) {
+ if (rq_data_dir(rq) == WRITE) {
if (!sdp->writeable) {
return 0;
}
SCpnt->cmnd[0] = WRITE_6;
SCpnt->sc_data_direction = DMA_TO_DEVICE;
- } else if (rq_data_dir(SCpnt->request) == READ) {
+ } else if (rq_data_dir(rq) == READ) {
SCpnt->cmnd[0] = READ_6;
SCpnt->sc_data_direction = DMA_FROM_DEVICE;
} else {
- printk(KERN_ERR "sd: Unknown command %lx\n",
- SCpnt->request->flags);
-/* overkill panic("Unknown sd command %lx\n", SCpnt->request->flags); */
+ printk(KERN_ERR "sd: Unknown command %x\n", rq->cmd_flags);
return 0;
}
SCSI_LOG_HLQUEUE(2, printk("%s : %s %d/%ld 512 byte blocks.\n",
- disk->disk_name, (rq_data_dir(SCpnt->request) == WRITE) ?
- "writing" : "reading", this_count, SCpnt->request->nr_sectors));
+ disk->disk_name, (rq_data_dir(rq) == WRITE) ?
+ "writing" : "reading", this_count, rq->nr_sectors));
SCpnt->cmnd[1] = 0;
if (block > 0xffffffff) {
SCpnt->cmnd[0] += READ_16 - READ_6;
+ SCpnt->cmnd[1] |= blk_fua_rq(rq) ? 0x8 : 0;
SCpnt->cmnd[2] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0;
SCpnt->cmnd[3] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0;
SCpnt->cmnd[4] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0;
this_count = 0xffff;
SCpnt->cmnd[0] += READ_10 - READ_6;
+ SCpnt->cmnd[1] |= blk_fua_rq(rq) ? 0x8 : 0;
SCpnt->cmnd[2] = (unsigned char) (block >> 24) & 0xff;
SCpnt->cmnd[3] = (unsigned char) (block >> 16) & 0xff;
SCpnt->cmnd[4] = (unsigned char) (block >> 8) & 0xff;
SCpnt->cmnd[7] = (unsigned char) (this_count >> 8) & 0xff;
SCpnt->cmnd[8] = (unsigned char) this_count & 0xff;
} else {
- if (this_count > 0xff)
- this_count = 0xff;
+ if (unlikely(blk_fua_rq(rq))) {
+ /*
+ * This happens only if this drive failed
+ * 10byte rw command with ILLEGAL_REQUEST
+ * during operation and thus turned off
+ * use_10_for_rw.
+ */
+ printk(KERN_ERR "sd: FUA write on READ/WRITE(6) drive\n");
+ return 0;
+ }
SCpnt->cmnd[1] |= (unsigned char) ((block >> 16) & 0x1f);
SCpnt->cmnd[2] = (unsigned char) ((block >> 8) & 0xff);
SCpnt->cmnd[4] = (unsigned char) this_count;
SCpnt->cmnd[5] = 0;
}
- SCpnt->request_bufflen = SCpnt->bufflen =
- this_count * sdp->sector_size;
+ SCpnt->request_bufflen = this_count * sdp->sector_size;
/*
* We shouldn't disconnect in the middle of a sector, so with a dumb
*/
SCpnt->transfersize = sdp->sector_size;
SCpnt->underflow = this_count << 9;
-
-queue:
SCpnt->allowed = SD_MAX_RETRIES;
SCpnt->timeout_per_command = timeout;
return 0;
}
-static int sd_hdio_getgeo(struct block_device *bdev, struct hd_geometry __user *loc)
+static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
{
struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk);
struct scsi_device *sdp = sdkp->device;
else
scsicam_bios_param(bdev, sdkp->capacity, diskinfo);
- if (put_user(diskinfo[0], &loc->heads))
- return -EFAULT;
- if (put_user(diskinfo[1], &loc->sectors))
- return -EFAULT;
- if (put_user(diskinfo[2], &loc->cylinders))
- return -EFAULT;
- if (put_user((unsigned)get_start_sect(bdev),
- (unsigned long __user *)&loc->start))
- return -EFAULT;
+ geo->heads = diskinfo[0];
+ geo->sectors = diskinfo[1];
+ geo->cylinders = diskinfo[2];
return 0;
}
* may try and take the device offline, in which case all further
* access to the device is prohibited.
*/
- if (!scsi_block_when_processing_errors(sdp))
- return -ENODEV;
-
- if (cmd == HDIO_GETGEO) {
- if (!arg)
- return -EINVAL;
- return sd_hdio_getgeo(bdev, p);
- }
+ error = scsi_nonblockable_ioctl(sdp, cmd, p, filp);
+ if (!scsi_block_when_processing_errors(sdp) || !error)
+ return error;
/*
* Send SCSI addressing ioctls directly to mid level, send other
*/
retval = -ENODEV;
if (scsi_block_when_processing_errors(sdp))
- retval = scsi_ioctl(sdp, SCSI_IOCTL_TEST_UNIT_READY, NULL);
+ retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES);
/*
* Unable to test, unit probably not ready. This usually
return 1;
}
+static int sd_sync_cache(struct scsi_device *sdp)
+{
+ int retries, res;
+ struct scsi_sense_hdr sshdr;
+
+ if (!scsi_device_online(sdp))
+ return -ENODEV;
+
+
+ for (retries = 3; retries > 0; --retries) {
+ unsigned char cmd[10] = { 0 };
+
+ cmd[0] = SYNCHRONIZE_CACHE;
+ /*
+ * Leave the rest of the command zero to indicate
+ * flush everything.
+ */
+ res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr,
+ SD_TIMEOUT, SD_MAX_RETRIES);
+ if (res == 0)
+ break;
+ }
+
+ if (res) { printk(KERN_WARNING "FAILED\n status = %x, message = %02x, "
+ "host = %d, driver = %02x\n ",
+ status_byte(res), msg_byte(res),
+ host_byte(res), driver_byte(res));
+ if (driver_byte(res) & DRIVER_SENSE)
+ scsi_print_sense_hdr("sd", &sshdr);
+ }
+
+ return res;
+}
+
+static int sd_issue_flush(struct device *dev, sector_t *error_sector)
+{
+ int ret = 0;
+ struct scsi_device *sdp = to_scsi_device(dev);
+ struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev);
+
+ if (!sdkp)
+ return -ENODEV;
+
+ if (sdkp->WCE)
+ ret = sd_sync_cache(sdp);
+ scsi_disk_put(sdkp);
+ return ret;
+}
+
+static void sd_prepare_flush(request_queue_t *q, struct request *rq)
+{
+ memset(rq->cmd, 0, sizeof(rq->cmd));
+ rq->cmd_type = REQ_TYPE_BLOCK_PC;
+ rq->timeout = SD_TIMEOUT;
+ rq->cmd[0] = SYNCHRONIZE_CACHE;
+ rq->cmd_len = 10;
+}
+
static void sd_rescan(struct device *dev)
{
- struct scsi_disk *sdkp = dev_get_drvdata(dev);
- sd_revalidate_disk(sdkp->disk);
+ struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev);
+
+ if (sdkp) {
+ sd_revalidate_disk(sdkp->disk);
+ scsi_disk_put(sdkp);
+ }
}
+
+#ifdef CONFIG_COMPAT
+/*
+ * This gets directly called from VFS. When the ioctl
+ * is not recognized we go back to the other translation paths.
+ */
+static long sd_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ struct block_device *bdev = file->f_path.dentry->d_inode->i_bdev;
+ struct gendisk *disk = bdev->bd_disk;
+ struct scsi_device *sdev = scsi_disk(disk)->device;
+
+ /*
+ * If we are in the middle of error recovery, don't let anyone
+ * else try and use this device. Also, if error recovery fails, it
+ * may try and take the device offline, in which case all further
+ * access to the device is prohibited.
+ */
+ if (!scsi_block_when_processing_errors(sdev))
+ return -ENODEV;
+
+ if (sdev->host->hostt->compat_ioctl) {
+ int ret;
+
+ ret = sdev->host->hostt->compat_ioctl(sdev, cmd, (void __user *)arg);
+
+ return ret;
+ }
+
+ /*
+ * Let the static ioctl translation table take care of it.
+ */
+ return -ENOIOCTLCMD;
+}
+#endif
+
static struct block_device_operations sd_fops = {
.owner = THIS_MODULE,
.open = sd_open,
.release = sd_release,
.ioctl = sd_ioctl,
+ .getgeo = sd_getgeo,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = sd_compat_ioctl,
+#endif
.media_changed = sd_media_changed,
.revalidate_disk = sd_revalidate_disk,
};
static void sd_rw_intr(struct scsi_cmnd * SCpnt)
{
int result = SCpnt->result;
- int this_count = SCpnt->bufflen;
- int good_bytes = (result == 0 ? this_count : 0);
- sector_t block_sectors = 1;
- sector_t error_sector;
+ unsigned int xfer_size = SCpnt->request_bufflen;
+ unsigned int good_bytes = result ? 0 : xfer_size;
+ u64 start_lba = SCpnt->request->sector;
+ u64 bad_lba;
+ struct scsi_sense_hdr sshdr;
+ int sense_valid = 0;
+ int sense_deferred = 0;
+ int info_valid;
+
+ if (result) {
+ sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr);
+ if (sense_valid)
+ sense_deferred = scsi_sense_is_deferred(&sshdr);
+ }
#ifdef CONFIG_SCSI_LOGGING
SCSI_LOG_HLCOMPLETE(1, printk("sd_rw_intr: %s: res=0x%x\n",
SCpnt->request->rq_disk->disk_name, result));
- if (0 != result) {
- SCSI_LOG_HLCOMPLETE(1, printk("sd_rw_intr: sb[0,2,asc,ascq]"
- "=%x,%x,%x,%x\n", SCpnt->sense_buffer[0],
- SCpnt->sense_buffer[2], SCpnt->sense_buffer[12],
- SCpnt->sense_buffer[13]));
+ if (sense_valid) {
+ SCSI_LOG_HLCOMPLETE(1, printk("sd_rw_intr: sb[respc,sk,asc,"
+ "ascq]=%x,%x,%x,%x\n", sshdr.response_code,
+ sshdr.sense_key, sshdr.asc, sshdr.ascq));
}
#endif
- /*
- Handle MEDIUM ERRORs that indicate partial success. Since this is a
- relatively rare error condition, no care is taken to avoid
- unnecessary additional work such as memcpy's that could be avoided.
- */
-
- /* An error occurred */
- if (driver_byte(result) != 0 && /* An error occurred */
- (SCpnt->sense_buffer[0] & 0x7f) == 0x70) { /* Sense current */
- switch (SCpnt->sense_buffer[2]) {
- case MEDIUM_ERROR:
- if (!(SCpnt->sense_buffer[0] & 0x80))
- 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) |
- SCpnt->sense_buffer[6];
- if (SCpnt->request->bio != NULL)
- block_sectors = bio_sectors(SCpnt->request->bio);
- switch (SCpnt->device->sector_size) {
- case 1024:
- error_sector <<= 1;
- if (block_sectors < 2)
- block_sectors = 2;
- break;
- case 2048:
- error_sector <<= 2;
- if (block_sectors < 4)
- block_sectors = 4;
- break;
- case 4096:
- error_sector <<=3;
- if (block_sectors < 8)
- block_sectors = 8;
- break;
- case 256:
- error_sector >>= 1;
- break;
- default:
- break;
- }
+ if (driver_byte(result) != DRIVER_SENSE &&
+ (!sense_valid || sense_deferred))
+ goto out;
- error_sector &= ~(block_sectors - 1);
- good_bytes = (error_sector - SCpnt->request->sector) << 9;
- if (good_bytes < 0 || good_bytes >= this_count)
- good_bytes = 0;
+ switch (sshdr.sense_key) {
+ case HARDWARE_ERROR:
+ case MEDIUM_ERROR:
+ if (!blk_fs_request(SCpnt->request))
+ goto out;
+ info_valid = scsi_get_sense_info_fld(SCpnt->sense_buffer,
+ SCSI_SENSE_BUFFERSIZE,
+ &bad_lba);
+ if (!info_valid)
+ goto out;
+ if (xfer_size <= SCpnt->device->sector_size)
+ goto out;
+ switch (SCpnt->device->sector_size) {
+ case 256:
+ start_lba <<= 1;
break;
-
- case RECOVERED_ERROR: /* an error occurred, but it recovered */
- case NO_SENSE: /* LLDD got sense data */
- /*
- * Inform the user, but make sure that it's not treated
- * as a hard error.
- */
- scsi_print_sense("sd", SCpnt);
- SCpnt->result = 0;
- SCpnt->sense_buffer[0] = 0x0;
- good_bytes = this_count;
+ case 512:
break;
-
- case ILLEGAL_REQUEST:
- if (SCpnt->device->use_10_for_rw &&
- (SCpnt->cmnd[0] == READ_10 ||
- SCpnt->cmnd[0] == WRITE_10))
- SCpnt->device->use_10_for_rw = 0;
- if (SCpnt->device->use_10_for_ms &&
- (SCpnt->cmnd[0] == MODE_SENSE_10 ||
- SCpnt->cmnd[0] == MODE_SELECT_10))
- SCpnt->device->use_10_for_ms = 0;
+ case 1024:
+ start_lba >>= 1;
+ break;
+ case 2048:
+ start_lba >>= 2;
+ break;
+ case 4096:
+ start_lba >>= 3;
break;
-
default:
+ /* Print something here with limiting frequency. */
+ goto out;
break;
}
+ /* This computation should always be done in terms of
+ * the resolution of the device's medium.
+ */
+ good_bytes = (bad_lba - start_lba)*SCpnt->device->sector_size;
+ break;
+ case RECOVERED_ERROR:
+ case NO_SENSE:
+ /* Inform the user, but make sure that it's not treated
+ * as a hard error.
+ */
+ scsi_print_sense("sd", SCpnt);
+ SCpnt->result = 0;
+ memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
+ good_bytes = xfer_size;
+ break;
+ case ILLEGAL_REQUEST:
+ if (SCpnt->device->use_10_for_rw &&
+ (SCpnt->cmnd[0] == READ_10 ||
+ SCpnt->cmnd[0] == WRITE_10))
+ SCpnt->device->use_10_for_rw = 0;
+ if (SCpnt->device->use_10_for_ms &&
+ (SCpnt->cmnd[0] == MODE_SENSE_10 ||
+ SCpnt->cmnd[0] == MODE_SELECT_10))
+ SCpnt->device->use_10_for_ms = 0;
+ break;
+ default:
+ break;
}
- /*
- * This calls the generic completion function, now that we know
- * how many actual sectors finished, and how many sectors we need
- * to say have failed.
- */
- scsi_io_completion(SCpnt, good_bytes, block_sectors << 9);
+ out:
+ scsi_io_completion(SCpnt, good_bytes);
}
-static int media_not_present(struct scsi_disk *sdkp, struct scsi_request *srp)
+static int media_not_present(struct scsi_disk *sdkp,
+ struct scsi_sense_hdr *sshdr)
{
- if (!srp->sr_result)
+
+ if (!scsi_sense_valid(sshdr))
return 0;
- if (!(driver_byte(srp->sr_result) & DRIVER_SENSE))
+ /* not invoked for commands that could return deferred errors */
+ if (sshdr->sense_key != NOT_READY &&
+ sshdr->sense_key != UNIT_ATTENTION)
return 0;
- if (srp->sr_sense_buffer[2] != NOT_READY &&
- srp->sr_sense_buffer[2] != UNIT_ATTENTION)
- return 0;
- if (srp->sr_sense_buffer[12] != 0x3A) /* medium not present */
+ if (sshdr->asc != 0x3A) /* medium not present */
return 0;
set_media_not_present(sdkp);
* spinup disk - called only in sd_revalidate_disk()
*/
static void
-sd_spinup_disk(struct scsi_disk *sdkp, char *diskname,
- struct scsi_request *SRpnt, unsigned char *buffer) {
+sd_spinup_disk(struct scsi_disk *sdkp, char *diskname)
+{
unsigned char cmd[10];
- unsigned long spintime_value = 0;
+ unsigned long spintime_expire = 0;
int retries, spintime;
unsigned int the_result;
+ struct scsi_sense_hdr sshdr;
+ int sense_valid = 0;
spintime = 0;
cmd[0] = TEST_UNIT_READY;
memset((void *) &cmd[1], 0, 9);
- SRpnt->sr_cmd_len = 0;
- SRpnt->sr_sense_buffer[0] = 0;
- SRpnt->sr_sense_buffer[2] = 0;
- SRpnt->sr_data_direction = DMA_NONE;
+ the_result = scsi_execute_req(sdkp->device, cmd,
+ DMA_NONE, NULL, 0,
+ &sshdr, SD_TIMEOUT,
+ SD_MAX_RETRIES);
- scsi_wait_req (SRpnt, (void *) cmd, (void *) buffer,
- 0/*512*/, SD_TIMEOUT, SD_MAX_RETRIES);
+ /*
+ * If the drive has indicated to us that it
+ * doesn't have any media in it, don't bother
+ * with any more polling.
+ */
+ if (media_not_present(sdkp, &sshdr))
+ return;
- the_result = SRpnt->sr_result;
+ if (the_result)
+ sense_valid = scsi_sense_valid(&sshdr);
retries++;
} while (retries < 3 &&
(!scsi_status_is_good(the_result) ||
((driver_byte(the_result) & DRIVER_SENSE) &&
- SRpnt->sr_sense_buffer[2] == UNIT_ATTENTION)));
-
- /*
- * If the drive has indicated to us that it doesn't have
- * any media in it, don't bother with any of the rest of
- * this crap.
- */
- if (media_not_present(sdkp, SRpnt))
- return;
+ sense_valid && sshdr.sense_key == UNIT_ATTENTION)));
if ((driver_byte(the_result) & DRIVER_SENSE) == 0) {
/* no sense, TUR either succeeded or failed
* with a status error */
if(!spintime && !scsi_status_is_good(the_result))
- printk(KERN_NOTICE "%s: Unit Not Ready, error = 0x%x\n", diskname, the_result);
+ printk(KERN_NOTICE "%s: Unit Not Ready, "
+ "error = 0x%x\n", diskname, the_result);
break;
}
* If manual intervention is required, or this is an
* absent USB storage device, a spinup is meaningless.
*/
- if (SRpnt->sr_sense_buffer[2] == NOT_READY &&
- SRpnt->sr_sense_buffer[12] == 4 /* not ready */ &&
- SRpnt->sr_sense_buffer[13] == 3) {
+ if (sense_valid &&
+ sshdr.sense_key == NOT_READY &&
+ sshdr.asc == 4 && sshdr.ascq == 3) {
break; /* manual intervention required */
/*
* Issue command to spin up drive when not ready
*/
- } else if (SRpnt->sr_sense_buffer[2] == NOT_READY) {
- unsigned long time1;
+ } else if (sense_valid && sshdr.sense_key == NOT_READY) {
if (!spintime) {
printk(KERN_NOTICE "%s: Spinning up disk...",
diskname);
cmd[1] = 1; /* Return immediately */
memset((void *) &cmd[2], 0, 8);
cmd[4] = 1; /* Start spin cycle */
- SRpnt->sr_cmd_len = 0;
- SRpnt->sr_sense_buffer[0] = 0;
- SRpnt->sr_sense_buffer[2] = 0;
-
- SRpnt->sr_data_direction = DMA_NONE;
- scsi_wait_req(SRpnt, (void *)cmd,
- (void *) buffer, 0/*512*/,
- SD_TIMEOUT, SD_MAX_RETRIES);
- spintime_value = jiffies;
+ scsi_execute_req(sdkp->device, cmd, DMA_NONE,
+ NULL, 0, &sshdr,
+ SD_TIMEOUT, SD_MAX_RETRIES);
+ spintime_expire = jiffies + 100 * HZ;
+ spintime = 1;
}
- spintime = 1;
- time1 = HZ;
/* Wait 1 second for next try */
- do {
- current->state = TASK_UNINTERRUPTIBLE;
- time1 = schedule_timeout(time1);
- } while(time1);
+ msleep(1000);
printk(".");
+
+ /*
+ * Wait for USB flash devices with slow firmware.
+ * Yes, this sense key/ASC combination shouldn't
+ * occur here. It's characteristic of these devices.
+ */
+ } else if (sense_valid &&
+ sshdr.sense_key == UNIT_ATTENTION &&
+ sshdr.asc == 0x28) {
+ if (!spintime) {
+ spintime_expire = jiffies + 5 * HZ;
+ spintime = 1;
+ }
+ /* Wait 1 second for next try */
+ msleep(1000);
} else {
/* we don't understand the sense code, so it's
* probably pointless to loop */
if(!spintime) {
- printk(KERN_NOTICE "%s: Unit Not Ready, sense:\n", diskname);
- scsi_print_req_sense("", SRpnt);
+ printk(KERN_NOTICE "%s: Unit Not Ready, "
+ "sense:\n", diskname);
+ scsi_print_sense_hdr("", &sshdr);
}
break;
}
- } while (spintime &&
- time_after(spintime_value + 100 * HZ, jiffies));
+ } while (spintime && time_before_eq(jiffies, spintime_expire));
if (spintime) {
if (scsi_status_is_good(the_result))
*/
static void
sd_read_capacity(struct scsi_disk *sdkp, char *diskname,
- struct scsi_request *SRpnt, unsigned char *buffer) {
+ unsigned char *buffer)
+{
unsigned char cmd[16];
- struct scsi_device *sdp = sdkp->device;
int the_result, retries;
int sector_size = 0;
int longrc = 0;
+ struct scsi_sense_hdr sshdr;
+ int sense_valid = 0;
+ struct scsi_device *sdp = sdkp->device;
repeat:
retries = 3;
memset((void *) buffer, 0, 8);
}
- SRpnt->sr_cmd_len = 0;
- SRpnt->sr_sense_buffer[0] = 0;
- SRpnt->sr_sense_buffer[2] = 0;
- SRpnt->sr_data_direction = DMA_FROM_DEVICE;
-
- scsi_wait_req(SRpnt, (void *) cmd, (void *) buffer,
- longrc ? 12 : 8, SD_TIMEOUT, SD_MAX_RETRIES);
+ the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE,
+ buffer, longrc ? 12 : 8, &sshdr,
+ SD_TIMEOUT, SD_MAX_RETRIES);
- if (media_not_present(sdkp, SRpnt))
+ if (media_not_present(sdkp, &sshdr))
return;
- the_result = SRpnt->sr_result;
+ if (the_result)
+ sense_valid = scsi_sense_valid(&sshdr);
retries--;
} while (the_result && retries);
driver_byte(the_result));
if (driver_byte(the_result) & DRIVER_SENSE)
- scsi_print_req_sense("sd", SRpnt);
+ scsi_print_sense_hdr("sd", &sshdr);
else
printk("%s : sense not available. \n", diskname);
/* Set dirty bit for removable devices if not ready -
* sometimes drives will not report this properly. */
if (sdp->removable &&
- SRpnt->sr_sense_buffer[2] == NOT_READY)
+ sense_valid && sshdr.sense_key == NOT_READY)
sdp->changed = 1;
/* Either no media are present but the drive didn't tell us,
or they are present but the read capacity command fails */
/* sdkp->media_present = 0; -- not always correct */
- sdkp->capacity = 0x200000; /* 1 GB - random */
+ sdkp->capacity = 0; /* unknown mapped to zero - as usual */
return;
} else if (the_result && longrc) {
" READ CAPACITY(16).\n", diskname);
longrc = 1;
goto repeat;
- } else {
- printk(KERN_ERR "%s: too big for kernel. Assuming maximum 2Tb\n", diskname);
}
+ printk(KERN_ERR "%s: too big for this kernel. Use a "
+ "kernel compiled with support for large block "
+ "devices.\n", diskname);
+ sdkp->capacity = 0;
+ goto got_data;
}
sdkp->capacity = 1 + (((sector_t)buffer[0] << 24) |
(buffer[1] << 16) |
(buffer[9] << 16) | (buffer[10] << 8) | buffer[11];
}
+ /* Some devices return the total number of sectors, not the
+ * highest sector number. Make the necessary adjustment. */
+ if (sdp->fix_capacity)
+ --sdkp->capacity;
+
got_data:
if (sector_size == 0) {
sector_size = 512;
* For this reason, we leave the thing in the table.
*/
sdkp->capacity = 0;
+ /*
+ * set a bogus sector size so the normal read/write
+ * logic in the block layer will eventually refuse any
+ * request on this device without tripping over power
+ * of two sector size assumptions
+ */
+ sector_size = 512;
}
{
/*
* Jacques Gelinas (Jacques@solucorp.qc.ca)
*/
int hard_sector = sector_size;
- sector_t sz = sdkp->capacity * (hard_sector/256);
+ sector_t sz = (sdkp->capacity/2) * (hard_sector/256);
request_queue_t *queue = sdp->request_queue;
- sector_t mb;
+ sector_t mb = sz;
blk_queue_hardsect_size(queue, hard_sector);
/* avoid 64-bit division on 32-bit platforms */
- mb = sz >> 1;
- sector_div(sz, 1250);
+ sector_div(sz, 625);
mb -= sz - 974;
sector_div(mb, 1950);
/* called with buffer of length 512 */
static inline int
-sd_do_mode_sense(struct scsi_request *SRpnt, int dbd, int modepage,
- unsigned char *buffer, int len, struct scsi_mode_data *data)
+sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage,
+ unsigned char *buffer, int len, struct scsi_mode_data *data,
+ struct scsi_sense_hdr *sshdr)
{
- return __scsi_mode_sense(SRpnt, dbd, modepage, buffer, len,
- SD_TIMEOUT, SD_MAX_RETRIES, data);
+ return scsi_mode_sense(sdp, dbd, modepage, buffer, len,
+ SD_TIMEOUT, SD_MAX_RETRIES, data,
+ sshdr);
}
/*
* read write protect setting, if possible - called only in sd_revalidate_disk()
- * called with buffer of length 512
+ * called with buffer of length SD_BUF_SIZE
*/
static void
sd_read_write_protect_flag(struct scsi_disk *sdkp, char *diskname,
- struct scsi_request *SRpnt, unsigned char *buffer) {
+ unsigned char *buffer)
+{
int res;
+ struct scsi_device *sdp = sdkp->device;
struct scsi_mode_data data;
set_disk_ro(sdkp->disk, 0);
- if (sdkp->device->skip_ms_page_3f) {
+ if (sdp->skip_ms_page_3f) {
printk(KERN_NOTICE "%s: assuming Write Enabled\n", diskname);
return;
}
- if (sdkp->device->use_192_bytes_for_3f) {
- res = sd_do_mode_sense(SRpnt, 0, 0x3F, buffer, 192, &data);
+ if (sdp->use_192_bytes_for_3f) {
+ res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 192, &data, NULL);
} else {
/*
* First attempt: ask for all pages (0x3F), but only 4 bytes.
* We have to start carefully: some devices hang if we ask
* for more than is available.
*/
- res = sd_do_mode_sense(SRpnt, 0, 0x3F, buffer, 4, &data);
+ res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 4, &data, NULL);
/*
* Second attempt: ask for page 0 When only page 0 is
* CDB.
*/
if (!scsi_status_is_good(res))
- res = sd_do_mode_sense(SRpnt, 0, 0, buffer, 4, &data);
+ res = sd_do_mode_sense(sdp, 0, 0, buffer, 4, &data, NULL);
/*
* Third attempt: ask 255 bytes, as we did earlier.
*/
if (!scsi_status_is_good(res))
- res = sd_do_mode_sense(SRpnt, 0, 0x3F, buffer, 255,
- &data);
+ res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 255,
+ &data, NULL);
}
if (!scsi_status_is_good(res)) {
/*
* sd_read_cache_type - called only from sd_revalidate_disk()
- * called with buffer of length 512
+ * called with buffer of length SD_BUF_SIZE
*/
static void
sd_read_cache_type(struct scsi_disk *sdkp, char *diskname,
- struct scsi_request *SRpnt, unsigned char *buffer) {
+ unsigned char *buffer)
+{
int len = 0, res;
+ struct scsi_device *sdp = sdkp->device;
- const int dbd = 0; /* DBD */
- const int modepage = 0x08; /* current values, cache page */
+ int dbd;
+ int modepage;
struct scsi_mode_data data;
+ struct scsi_sense_hdr sshdr;
- if (sdkp->device->skip_ms_page_8)
+ if (sdp->skip_ms_page_8)
goto defaults;
+ if (sdp->type == TYPE_RBC) {
+ modepage = 6;
+ dbd = 8;
+ } else {
+ modepage = 8;
+ dbd = 0;
+ }
+
/* cautiously ask */
- res = sd_do_mode_sense(SRpnt, dbd, modepage, buffer, 4, &data);
+ res = sd_do_mode_sense(sdp, dbd, modepage, buffer, 4, &data, &sshdr);
if (!scsi_status_is_good(res))
goto bad_sense;
+ if (!data.header_length) {
+ modepage = 6;
+ printk(KERN_ERR "%s: missing header in MODE_SENSE response\n",
+ diskname);
+ }
+
/* that went OK, now ask for the proper length */
len = data.length;
/* Take headers and block descriptors into account */
len += data.header_length + data.block_descriptor_length;
+ if (len > SD_BUF_SIZE)
+ goto bad_sense;
/* Get the data */
- res = sd_do_mode_sense(SRpnt, dbd, modepage, buffer, len, &data);
+ res = sd_do_mode_sense(sdp, dbd, modepage, buffer, len, &data, &sshdr);
if (scsi_status_is_good(res)) {
- const char *types[] = {
- "write through", "none", "write back",
- "write back, no read (daft)"
- };
- int ct = 0;
- int offset = data.header_length +
- data.block_descriptor_length + 2;
+ int offset = data.header_length + data.block_descriptor_length;
- sdkp->WCE = ((buffer[offset] & 0x04) != 0);
- sdkp->RCD = ((buffer[offset] & 0x01) != 0);
+ if (offset >= SD_BUF_SIZE - 2) {
+ printk(KERN_ERR "%s: malformed MODE SENSE response",
+ diskname);
+ goto defaults;
+ }
+
+ if ((buffer[offset] & 0x3f) != modepage) {
+ printk(KERN_ERR "%s: got wrong page\n", diskname);
+ goto defaults;
+ }
- ct = sdkp->RCD + 2*sdkp->WCE;
+ if (modepage == 8) {
+ sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0);
+ sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0);
+ } else {
+ sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0);
+ sdkp->RCD = 0;
+ }
+
+ sdkp->DPOFUA = (data.device_specific & 0x10) != 0;
+ if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw) {
+ printk(KERN_NOTICE "SCSI device %s: uses "
+ "READ/WRITE(6), disabling FUA\n", diskname);
+ sdkp->DPOFUA = 0;
+ }
- printk(KERN_NOTICE "SCSI device %s: drive cache: %s\n",
- diskname, types[ct]);
+ printk(KERN_NOTICE "SCSI device %s: "
+ "write cache: %s, read cache: %s, %s\n",
+ diskname,
+ sdkp->WCE ? "enabled" : "disabled",
+ sdkp->RCD ? "disabled" : "enabled",
+ sdkp->DPOFUA ? "supports DPO and FUA"
+ : "doesn't support DPO or FUA");
return;
}
bad_sense:
- if ((SRpnt->sr_sense_buffer[0] & 0x70) == 0x70
- && (SRpnt->sr_sense_buffer[2] & 0x0f) == ILLEGAL_REQUEST
- /* ASC 0x24 ASCQ 0x00: Invalid field in CDB */
- && SRpnt->sr_sense_buffer[12] == 0x24
- && SRpnt->sr_sense_buffer[13] == 0x00) {
+ if (scsi_sense_valid(&sshdr) &&
+ sshdr.sense_key == ILLEGAL_REQUEST &&
+ sshdr.asc == 0x24 && sshdr.ascq == 0x0)
printk(KERN_NOTICE "%s: cache data unavailable\n",
- diskname);
- } else {
+ diskname); /* Invalid field in CDB */
+ else
printk(KERN_ERR "%s: asking for cache data failed\n",
diskname);
- }
defaults:
printk(KERN_ERR "%s: assuming drive cache: write through\n",
diskname);
sdkp->WCE = 0;
sdkp->RCD = 0;
+ sdkp->DPOFUA = 0;
}
/**
{
struct scsi_disk *sdkp = scsi_disk(disk);
struct scsi_device *sdp = sdkp->device;
- struct scsi_request *sreq;
unsigned char *buffer;
+ unsigned ordered;
SCSI_LOG_HLQUEUE(3, printk("sd_revalidate_disk: disk=%s\n", disk->disk_name));
if (!scsi_device_online(sdp))
goto out;
- sreq = scsi_allocate_request(sdp, GFP_KERNEL);
- if (!sreq) {
- printk(KERN_WARNING "(sd_revalidate_disk:) Request allocation "
- "failure.\n");
- goto out;
- }
-
- buffer = kmalloc(512, GFP_KERNEL | __GFP_DMA);
+ buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL | __GFP_DMA);
if (!buffer) {
printk(KERN_WARNING "(sd_revalidate_disk:) Memory allocation "
"failure.\n");
- goto out_release_request;
+ goto out;
}
/* defaults, until the device tells us otherwise */
sdkp->WCE = 0;
sdkp->RCD = 0;
- sd_spinup_disk(sdkp, disk->disk_name, sreq, buffer);
+ sd_spinup_disk(sdkp, disk->disk_name);
/*
* Without media there is no reason to ask; moreover, some devices
* react badly if we do.
*/
if (sdkp->media_present) {
- sd_read_capacity(sdkp, disk->disk_name, sreq, buffer);
- if (sdp->removable)
- sd_read_write_protect_flag(sdkp, disk->disk_name,
- sreq, buffer);
- sd_read_cache_type(sdkp, disk->disk_name, sreq, buffer);
+ sd_read_capacity(sdkp, disk->disk_name, buffer);
+ sd_read_write_protect_flag(sdkp, disk->disk_name, buffer);
+ sd_read_cache_type(sdkp, disk->disk_name, buffer);
}
-
+
+ /*
+ * We now have all cache related info, determine how we deal
+ * with ordered requests. Note that as the current SCSI
+ * dispatch function can alter request order, we cannot use
+ * QUEUE_ORDERED_TAG_* even when ordered tag is supported.
+ */
+ if (sdkp->WCE)
+ ordered = sdkp->DPOFUA
+ ? QUEUE_ORDERED_DRAIN_FUA : QUEUE_ORDERED_DRAIN_FLUSH;
+ else
+ ordered = QUEUE_ORDERED_DRAIN;
+
+ blk_queue_ordered(sdkp->disk->queue, ordered, sd_prepare_flush);
+
set_capacity(disk, sdkp->capacity);
kfree(buffer);
- out_release_request:
- scsi_release_request(sreq);
out:
return 0;
}
struct scsi_disk *sdkp;
struct gendisk *gd;
u32 index;
- int error, devno;
+ int error;
error = -ENODEV;
- if ((sdp->type != TYPE_DISK) && (sdp->type != TYPE_MOD))
+ if (sdp->type != TYPE_DISK && sdp->type != TYPE_MOD && sdp->type != TYPE_RBC)
goto out;
- SCSI_LOG_HLQUEUE(3, printk("sd_attach: scsi device: <%d,%d,%d,%d>\n",
- sdp->host->host_no, sdp->channel, sdp->id, sdp->lun));
+ SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp,
+ "sd_attach\n"));
error = -ENOMEM;
- sdkp = kmalloc(sizeof(*sdkp), GFP_KERNEL);
+ sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL);
if (!sdkp)
goto out;
- memset (sdkp, 0, sizeof(*sdkp));
- kref_init(&sdkp->kref, scsi_disk_release);
-
- /* Note: We can accomodate 64 partitions, but the genhd code
- * assumes partitions allocate consecutive minors, which they don't.
- * So for now stay with max 16 partitions and leave two spare bits.
- * Later, we may change the genhd code and the alloc_disk() call
- * and the ->minors assignment here. KG, 2004-02-10
- */
gd = alloc_disk(16);
if (!gd)
goto out_free;
+ if (!idr_pre_get(&sd_index_idr, GFP_KERNEL))
+ goto out_put;
+
spin_lock(&sd_index_lock);
- index = find_first_zero_bit(sd_index_bits, SD_DISKS);
- if (index == SD_DISKS) {
- spin_unlock(&sd_index_lock);
+ error = idr_get_new(&sd_index_idr, NULL, &index);
+ spin_unlock(&sd_index_lock);
+
+ if (index >= SD_MAX_DISKS)
error = -EBUSY;
+ if (error)
goto out_put;
- }
- __set_bit(index, sd_index_bits);
- spin_unlock(&sd_index_lock);
sdkp->device = sdp;
sdkp->driver = &sd_template;
sdkp->openers = 0;
if (!sdp->timeout) {
- if (sdp->type == TYPE_DISK)
+ if (sdp->type != TYPE_MOD)
sdp->timeout = SD_TIMEOUT;
else
sdp->timeout = SD_MOD_TIMEOUT;
}
- devno = make_sd_dev(index, 0);
- gd->major = MAJOR(devno);
- gd->first_minor = MINOR(devno);
+ class_device_initialize(&sdkp->cdev);
+ sdkp->cdev.dev = &sdp->sdev_gendev;
+ sdkp->cdev.class = &sd_disk_class;
+ strncpy(sdkp->cdev.class_id, sdp->sdev_gendev.bus_id, BUS_ID_SIZE);
+
+ if (class_device_add(&sdkp->cdev))
+ goto out_put;
+
+ get_device(&sdp->sdev_gendev);
+
+ gd->major = sd_major((index & 0xf0) >> 4);
+ gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00);
gd->minors = 16;
gd->fops = &sd_fops;
if (index < 26) {
sprintf(gd->disk_name, "sd%c", 'a' + index % 26);
- } else if (index < (26*27)) {
+ } else if (index < (26 + 1) * 26) {
sprintf(gd->disk_name, "sd%c%c",
'a' + index / 26 - 1,'a' + index % 26);
} else {
'a' + m1, 'a' + m2, 'a' + m3);
}
- strcpy(gd->devfs_name, sdp->devfs_name);
-
gd->private_data = &sdkp->driver;
+ gd->queue = sdkp->device->request_queue;
sd_revalidate_disk(gd);
gd->flags = GENHD_FL_DRIVERFS;
if (sdp->removable)
gd->flags |= GENHD_FL_REMOVABLE;
- gd->queue = sdkp->device->request_queue;
dev_set_drvdata(dev, sdkp);
add_disk(gd);
- printk(KERN_NOTICE "Attached scsi %sdisk %s at scsi%d, channel %d, "
- "id %d, lun %d\n", sdp->removable ? "removable " : "",
- gd->disk_name, sdp->host->host_no, sdp->channel,
- sdp->id, sdp->lun);
+ sdev_printk(KERN_NOTICE, sdp, "Attached scsi %sdisk %s\n",
+ sdp->removable ? "removable " : "", gd->disk_name);
return 0;
-out_put:
+ out_put:
put_disk(gd);
-out_free:
+ out_free:
kfree(sdkp);
-out:
+ out:
return error;
}
{
struct scsi_disk *sdkp = dev_get_drvdata(dev);
+ class_device_del(&sdkp->cdev);
del_gendisk(sdkp->disk);
sd_shutdown(dev);
- down(&sd_ref_sem);
- kref_put(&sdkp->kref);
- up(&sd_ref_sem);
+
+ mutex_lock(&sd_ref_mutex);
+ dev_set_drvdata(dev, NULL);
+ class_device_put(&sdkp->cdev);
+ mutex_unlock(&sd_ref_mutex);
return 0;
}
/**
* scsi_disk_release - Called to free the scsi_disk structure
- * @kref: pointer to embedded kref
+ * @cdev: pointer to embedded class device
*
- * sd_ref_sem must be held entering this routine. Because it is
+ * sd_ref_mutex must be held entering this routine. Because it is
* called on last put, you should always use the scsi_disk_get()
* scsi_disk_put() helpers which manipulate the semaphore directly
- * and never do a direct kref_put().
+ * and never do a direct class_device_put().
**/
-static void scsi_disk_release(struct kref *kref)
+static void scsi_disk_release(struct class_device *cdev)
{
- struct scsi_disk *sdkp = to_scsi_disk(kref);
+ struct scsi_disk *sdkp = to_scsi_disk(cdev);
struct gendisk *disk = sdkp->disk;
spin_lock(&sd_index_lock);
- clear_bit(sdkp->index, sd_index_bits);
+ idr_remove(&sd_index_idr, sdkp->index);
spin_unlock(&sd_index_lock);
disk->private_data = NULL;
-
put_disk(disk);
+ put_device(&sdkp->device->sdev_gendev);
kfree(sdkp);
}
static void sd_shutdown(struct device *dev)
{
struct scsi_device *sdp = to_scsi_device(dev);
- struct scsi_disk *sdkp;
- struct scsi_request *sreq;
- int retries, res;
+ struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev);
- sdkp = dev_get_drvdata(dev);
if (!sdkp)
- return; /* this can happen */
-
- if (!scsi_device_online(sdp) || !sdkp->WCE)
- return;
-
- printk(KERN_NOTICE "Synchronizing SCSI cache for disk %s: ",
- sdkp->disk->disk_name);
+ return; /* this can happen */
- sreq = scsi_allocate_request(sdp, GFP_KERNEL);
- if (!sreq) {
- printk("FAILED\n No memory for request\n");
- return;
+ if (sdkp->WCE) {
+ printk(KERN_NOTICE "Synchronizing SCSI cache for disk %s: \n",
+ sdkp->disk->disk_name);
+ sd_sync_cache(sdp);
}
-
- sreq->sr_data_direction = DMA_NONE;
- for (retries = 3; retries > 0; --retries) {
- unsigned char cmd[10] = { 0 };
-
- cmd[0] = SYNCHRONIZE_CACHE;
- /*
- * Leave the rest of the command zero to indicate
- * flush everything.
- */
- scsi_wait_req(sreq, cmd, NULL, 0, SD_TIMEOUT, SD_MAX_RETRIES);
- if (sreq->sr_result == 0)
- break;
- }
-
- res = sreq->sr_result;
- if (res) {
- printk(KERN_WARNING "FAILED\n status = %x, message = %02x, "
- "host = %d, driver = %02x\n ",
- status_byte(res), msg_byte(res),
- host_byte(res), driver_byte(res));
- if (driver_byte(res) & DRIVER_SENSE)
- scsi_print_req_sense("sd", sreq);
- }
-
- scsi_release_request(sreq);
- printk("\n");
-}
+ scsi_disk_put(sdkp);
+}
/**
* init_sd - entry point for this driver (both when built in or when
**/
static int __init init_sd(void)
{
- int majors = 0, i;
+ int majors = 0, i, err;
SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n"));
if (!majors)
return -ENODEV;
- return scsi_register_driver(&sd_template.gendrv);
+ err = class_register(&sd_disk_class);
+ if (err)
+ goto err_out;
+
+ err = scsi_register_driver(&sd_template.gendrv);
+ if (err)
+ goto err_out_class;
+
+ return 0;
+
+err_out_class:
+ class_unregister(&sd_disk_class);
+err_out:
+ for (i = 0; i < SD_MAJORS; i++)
+ unregister_blkdev(sd_major(i), "sd");
+ return err;
}
/**
SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n"));
scsi_unregister_driver(&sd_template.gendrv);
+ class_unregister(&sd_disk_class);
+
for (i = 0; i < SD_MAJORS; i++)
unregister_blkdev(sd_major(i), "sd");
}
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Eric Youngdale");
-MODULE_DESCRIPTION("SCSI disk (sd) driver");
-
module_init(init_sd);
module_exit(exit_sd);
git://git.onelab.eu / linux-2.6.git / blobdiff