#include <linux/blkpg.h>
#include <linux/delay.h>
#include <linux/mutex.h>
+#include <linux/string_helpers.h>
+#include <linux/async.h>
+#include <linux/slab.h>
#include <asm/uaccess.h>
+#include <asm/unaligned.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD);
MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC);
+#if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT)
+#define SD_MINORS 16
+#else
+#define SD_MINORS 0
+#endif
+
static int sd_revalidate_disk(struct gendisk *);
static int sd_probe(struct device *);
static int sd_remove(struct device *);
static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *);
static void sd_print_result(struct scsi_disk *, int);
-static DEFINE_IDR(sd_index_idr);
static DEFINE_SPINLOCK(sd_index_lock);
+static DEFINE_IDA(sd_index_ida);
/* 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 DEFINE_MUTEX(sd_ref_mutex);
+struct kmem_cache *sd_cdb_cache;
+mempool_t *sd_cdb_pool;
+
static const char *sd_cache_types[] = {
"write through", "none", "write back",
"write back, no read (daft)"
sd_print_sense_hdr(sdkp, &sshdr);
return -EINVAL;
}
- sd_revalidate_disk(sdkp->disk);
+ revalidate_disk(sdkp->disk);
return count;
}
return snprintf(buf, 40, "%d\n", sdkp->device->allow_restart);
}
+static ssize_t
+sd_show_protection_type(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct scsi_disk *sdkp = to_scsi_disk(dev);
+
+ return snprintf(buf, 20, "%u\n", sdkp->protection_type);
+}
+
+static ssize_t
+sd_show_app_tag_own(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct scsi_disk *sdkp = to_scsi_disk(dev);
+
+ return snprintf(buf, 20, "%u\n", sdkp->ATO);
+}
+
+static ssize_t
+sd_show_thin_provisioning(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct scsi_disk *sdkp = to_scsi_disk(dev);
+
+ return snprintf(buf, 20, "%u\n", sdkp->thin_provisioning);
+}
+
static struct device_attribute sd_disk_attrs[] = {
__ATTR(cache_type, S_IRUGO|S_IWUSR, sd_show_cache_type,
sd_store_cache_type),
sd_store_allow_restart),
__ATTR(manage_start_stop, S_IRUGO|S_IWUSR, sd_show_manage_start_stop,
sd_store_manage_start_stop),
+ __ATTR(protection_type, S_IRUGO, sd_show_protection_type, NULL),
+ __ATTR(app_tag_own, S_IRUGO, sd_show_app_tag_own, NULL),
+ __ATTR(thin_provisioning, S_IRUGO, sd_show_thin_provisioning, NULL),
__ATTR_NULL,
};
mutex_unlock(&sd_ref_mutex);
}
+static void sd_prot_op(struct scsi_cmnd *scmd, unsigned int dif)
+{
+ unsigned int prot_op = SCSI_PROT_NORMAL;
+ unsigned int dix = scsi_prot_sg_count(scmd);
+
+ if (scmd->sc_data_direction == DMA_FROM_DEVICE) {
+ if (dif && dix)
+ prot_op = SCSI_PROT_READ_PASS;
+ else if (dif && !dix)
+ prot_op = SCSI_PROT_READ_STRIP;
+ else if (!dif && dix)
+ prot_op = SCSI_PROT_READ_INSERT;
+ } else {
+ if (dif && dix)
+ prot_op = SCSI_PROT_WRITE_PASS;
+ else if (dif && !dix)
+ prot_op = SCSI_PROT_WRITE_INSERT;
+ else if (!dif && dix)
+ prot_op = SCSI_PROT_WRITE_STRIP;
+ }
+
+ scsi_set_prot_op(scmd, prot_op);
+ scsi_set_prot_type(scmd, dif);
+}
+
+/**
+ * sd_prepare_discard - unmap blocks on thinly provisioned device
+ * @rq: Request to prepare
+ *
+ * Will issue either UNMAP or WRITE SAME(16) depending on preference
+ * indicated by target device.
+ **/
+static int sd_prepare_discard(struct request *rq)
+{
+ struct scsi_disk *sdkp = scsi_disk(rq->rq_disk);
+ struct bio *bio = rq->bio;
+ sector_t sector = bio->bi_sector;
+ unsigned int num = bio_sectors(bio);
+
+ if (sdkp->device->sector_size == 4096) {
+ sector >>= 3;
+ num >>= 3;
+ }
+
+ rq->cmd_type = REQ_TYPE_BLOCK_PC;
+ rq->timeout = SD_TIMEOUT;
+
+ memset(rq->cmd, 0, rq->cmd_len);
+
+ if (sdkp->unmap) {
+ char *buf = kmap_atomic(bio_page(bio), KM_USER0);
+
+ rq->cmd[0] = UNMAP;
+ rq->cmd[8] = 24;
+ rq->cmd_len = 10;
+
+ /* Ensure that data length matches payload */
+ rq->__data_len = bio->bi_size = bio->bi_io_vec->bv_len = 24;
+
+ put_unaligned_be16(6 + 16, &buf[0]);
+ put_unaligned_be16(16, &buf[2]);
+ put_unaligned_be64(sector, &buf[8]);
+ put_unaligned_be32(num, &buf[16]);
+
+ kunmap_atomic(buf, KM_USER0);
+ } else {
+ rq->cmd[0] = WRITE_SAME_16;
+ rq->cmd[1] = 0x8; /* UNMAP */
+ put_unaligned_be64(sector, &rq->cmd[2]);
+ put_unaligned_be32(num, &rq->cmd[10]);
+ rq->cmd_len = 16;
+ }
+
+ return BLKPREP_OK;
+}
+
/**
* sd_init_command - build a scsi (read or write) command from
* information in the request structure.
struct scsi_cmnd *SCpnt;
struct scsi_device *sdp = q->queuedata;
struct gendisk *disk = rq->rq_disk;
- sector_t block = rq->sector;
- unsigned int this_count = rq->nr_sectors;
- unsigned int timeout = sdp->timeout;
- int ret;
+ struct scsi_disk *sdkp;
+ sector_t block = blk_rq_pos(rq);
+ sector_t threshold;
+ unsigned int this_count = blk_rq_sectors(rq);
+ int ret, host_dif;
+ unsigned char protect;
+
+ /*
+ * Discard request come in as REQ_TYPE_FS but we turn them into
+ * block PC requests to make life easier.
+ */
+ if (blk_discard_rq(rq))
+ ret = sd_prepare_discard(rq);
if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
ret = scsi_setup_blk_pc_cmnd(sdp, rq);
if (ret != BLKPREP_OK)
goto out;
SCpnt = rq->special;
+ sdkp = scsi_disk(disk);
/* from here on until we're complete, any goto out
* is used for a killable error condition */
this_count));
if (!sdp || !scsi_device_online(sdp) ||
- block + rq->nr_sectors > get_capacity(disk)) {
+ block + blk_rq_sectors(rq) > get_capacity(disk)) {
SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt,
- "Finishing %ld sectors\n",
- rq->nr_sectors));
+ "Finishing %u sectors\n",
+ blk_rq_sectors(rq)));
SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt,
"Retry with 0x%p\n", SCpnt));
goto out;
}
/*
- * Some devices (some sdcards for one) don't like it if the
- * last sector gets read in a larger then 1 sector read.
+ * Some SD card readers can't handle multi-sector accesses which touch
+ * the last one or two hardware sectors. Split accesses as needed.
*/
- if (unlikely(sdp->last_sector_bug &&
- rq->nr_sectors > sdp->sector_size / 512 &&
- block + this_count == get_capacity(disk)))
- this_count -= sdp->sector_size / 512;
+ threshold = get_capacity(disk) - SD_LAST_BUGGY_SECTORS *
+ (sdp->sector_size / 512);
+
+ if (unlikely(sdp->last_sector_bug && block + this_count > threshold)) {
+ if (block < threshold) {
+ /* Access up to the threshold but not beyond */
+ this_count = threshold - block;
+ } else {
+ /* Access only a single hardware sector */
+ this_count = sdp->sector_size / 512;
+ }
+ }
SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, "block=%llu\n",
(unsigned long long)block));
* for this.
*/
if (sdp->sector_size == 1024) {
- if ((block & 1) || (rq->nr_sectors & 1)) {
+ if ((block & 1) || (blk_rq_sectors(rq) & 1)) {
scmd_printk(KERN_ERR, SCpnt,
"Bad block number requested\n");
goto out;
}
}
if (sdp->sector_size == 2048) {
- if ((block & 3) || (rq->nr_sectors & 3)) {
+ if ((block & 3) || (blk_rq_sectors(rq) & 3)) {
scmd_printk(KERN_ERR, SCpnt,
"Bad block number requested\n");
goto out;
}
}
if (sdp->sector_size == 4096) {
- if ((block & 7) || (rq->nr_sectors & 7)) {
+ if ((block & 7) || (blk_rq_sectors(rq) & 7)) {
scmd_printk(KERN_ERR, SCpnt,
"Bad block number requested\n");
goto out;
}
SCpnt->cmnd[0] = WRITE_6;
SCpnt->sc_data_direction = DMA_TO_DEVICE;
+
+ if (blk_integrity_rq(rq) &&
+ sd_dif_prepare(rq, block, sdp->sector_size) == -EIO)
+ goto out;
+
} else if (rq_data_dir(rq) == READ) {
SCpnt->cmnd[0] = READ_6;
SCpnt->sc_data_direction = DMA_FROM_DEVICE;
}
SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt,
- "%s %d/%ld 512 byte blocks.\n",
+ "%s %d/%u 512 byte blocks.\n",
(rq_data_dir(rq) == WRITE) ?
"writing" : "reading", this_count,
- rq->nr_sectors));
+ blk_rq_sectors(rq)));
- SCpnt->cmnd[1] = 0;
-
- if (block > 0xffffffff) {
+ /* Set RDPROTECT/WRPROTECT if disk is formatted with DIF */
+ host_dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type);
+ if (host_dif)
+ protect = 1 << 5;
+ else
+ protect = 0;
+
+ if (host_dif == SD_DIF_TYPE2_PROTECTION) {
+ SCpnt->cmnd = mempool_alloc(sd_cdb_pool, GFP_ATOMIC);
+
+ if (unlikely(SCpnt->cmnd == NULL)) {
+ ret = BLKPREP_DEFER;
+ goto out;
+ }
+
+ SCpnt->cmd_len = SD_EXT_CDB_SIZE;
+ memset(SCpnt->cmnd, 0, SCpnt->cmd_len);
+ SCpnt->cmnd[0] = VARIABLE_LENGTH_CMD;
+ SCpnt->cmnd[7] = 0x18;
+ SCpnt->cmnd[9] = (rq_data_dir(rq) == READ) ? READ_32 : WRITE_32;
+ SCpnt->cmnd[10] = protect | (blk_fua_rq(rq) ? 0x8 : 0);
+
+ /* LBA */
+ SCpnt->cmnd[12] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0;
+ SCpnt->cmnd[13] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0;
+ SCpnt->cmnd[14] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0;
+ SCpnt->cmnd[15] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0;
+ SCpnt->cmnd[16] = (unsigned char) (block >> 24) & 0xff;
+ SCpnt->cmnd[17] = (unsigned char) (block >> 16) & 0xff;
+ SCpnt->cmnd[18] = (unsigned char) (block >> 8) & 0xff;
+ SCpnt->cmnd[19] = (unsigned char) block & 0xff;
+
+ /* Expected Indirect LBA */
+ SCpnt->cmnd[20] = (unsigned char) (block >> 24) & 0xff;
+ SCpnt->cmnd[21] = (unsigned char) (block >> 16) & 0xff;
+ SCpnt->cmnd[22] = (unsigned char) (block >> 8) & 0xff;
+ SCpnt->cmnd[23] = (unsigned char) block & 0xff;
+
+ /* Transfer length */
+ SCpnt->cmnd[28] = (unsigned char) (this_count >> 24) & 0xff;
+ SCpnt->cmnd[29] = (unsigned char) (this_count >> 16) & 0xff;
+ SCpnt->cmnd[30] = (unsigned char) (this_count >> 8) & 0xff;
+ SCpnt->cmnd[31] = (unsigned char) this_count & 0xff;
+ } else if (block > 0xffffffff) {
SCpnt->cmnd[0] += READ_16 - READ_6;
- SCpnt->cmnd[1] |= blk_fua_rq(rq) ? 0x8 : 0;
+ SCpnt->cmnd[1] = protect | (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;
SCpnt->cmnd[13] = (unsigned char) this_count & 0xff;
SCpnt->cmnd[14] = SCpnt->cmnd[15] = 0;
} else if ((this_count > 0xff) || (block > 0x1fffff) ||
+ scsi_device_protection(SCpnt->device) ||
SCpnt->device->use_10_for_rw) {
if (this_count > 0xffff)
this_count = 0xffff;
SCpnt->cmnd[0] += READ_10 - READ_6;
- SCpnt->cmnd[1] |= blk_fua_rq(rq) ? 0x8 : 0;
+ SCpnt->cmnd[1] = protect | (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->sdb.length = this_count * sdp->sector_size;
+ /* If DIF or DIX is enabled, tell HBA how to handle request */
+ if (host_dif || scsi_prot_sg_count(SCpnt))
+ sd_prot_op(SCpnt, host_dif);
+
/*
* We shouldn't disconnect in the middle of a sector, so with a dumb
* host adapter, it's safe to assume that we can at least transfer
SCpnt->transfersize = sdp->sector_size;
SCpnt->underflow = this_count << 9;
SCpnt->allowed = SD_MAX_RETRIES;
- SCpnt->timeout_per_command = timeout;
/*
* This indicates that the command is ready from our end to be
* In the latter case @inode and @filp carry an abridged amount
* of information as noted above.
**/
-static int sd_open(struct inode *inode, struct file *filp)
+static int sd_open(struct block_device *bdev, fmode_t mode)
{
- struct gendisk *disk = inode->i_bdev->bd_disk;
- struct scsi_disk *sdkp;
+ struct scsi_disk *sdkp = scsi_disk_get(bdev->bd_disk);
struct scsi_device *sdev;
int retval;
- if (!(sdkp = scsi_disk_get(disk)))
+ if (!sdkp)
return -ENXIO;
-
SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n"));
sdev = sdkp->device;
goto error_out;
if (sdev->removable || sdkp->write_prot)
- check_disk_change(inode->i_bdev);
+ check_disk_change(bdev);
/*
* If the drive is empty, just let the open fail.
*/
retval = -ENOMEDIUM;
- if (sdev->removable && !sdkp->media_present &&
- !(filp->f_flags & O_NDELAY))
+ if (sdev->removable && !sdkp->media_present && !(mode & FMODE_NDELAY))
goto error_out;
/*
* if the user expects to be able to write to the thing.
*/
retval = -EROFS;
- if (sdkp->write_prot && (filp->f_mode & FMODE_WRITE))
+ if (sdkp->write_prot && (mode & FMODE_WRITE))
goto error_out;
/*
* Note: may block (uninterruptible) if error recovery is underway
* on this disk.
**/
-static int sd_release(struct inode *inode, struct file *filp)
+static int sd_release(struct gendisk *disk, fmode_t mode)
{
- struct gendisk *disk = inode->i_bdev->bd_disk;
struct scsi_disk *sdkp = scsi_disk(disk);
struct scsi_device *sdev = sdkp->device;
* Note: most ioctls are forward onto the block subsystem or further
* down in the scsi subsystem.
**/
-static int sd_ioctl(struct inode * inode, struct file * filp,
+static int sd_ioctl(struct block_device *bdev, fmode_t mode,
unsigned int cmd, unsigned long arg)
{
- struct block_device *bdev = inode->i_bdev;
struct gendisk *disk = bdev->bd_disk;
struct scsi_device *sdp = scsi_disk(disk)->device;
void __user *p = (void __user *)arg;
* may try and take the device offline, in which case all further
* access to the device is prohibited.
*/
- error = scsi_nonblockable_ioctl(sdp, cmd, p, filp);
+ error = scsi_nonblockable_ioctl(sdp, cmd, p,
+ (mode & FMODE_NDELAY) != 0);
if (!scsi_block_when_processing_errors(sdp) || !error)
return error;
case SCSI_IOCTL_GET_BUS_NUMBER:
return scsi_ioctl(sdp, cmd, p);
default:
- error = scsi_cmd_ioctl(filp, disk->queue, disk, cmd, p);
+ error = scsi_cmd_ioctl(disk->queue, disk, mode, cmd, p);
if (error != -ENOTTY)
return error;
}
* flush everything.
*/
res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr,
- SD_TIMEOUT, SD_MAX_RETRIES);
+ SD_TIMEOUT, SD_MAX_RETRIES, NULL);
if (res == 0)
break;
}
{
rq->cmd_type = REQ_TYPE_BLOCK_PC;
rq->timeout = SD_TIMEOUT;
+ rq->retries = SD_MAX_RETRIES;
rq->cmd[0] = SYNCHRONIZE_CACHE;
rq->cmd_len = 10;
}
struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev);
if (sdkp) {
- sd_revalidate_disk(sdkp->disk);
+ revalidate_disk(sdkp->disk);
scsi_disk_put(sdkp);
}
}
* 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)
+static int sd_compat_ioctl(struct block_device *bdev, fmode_t mode,
+ 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;
+ struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device;
/*
* If we are in the middle of error recovery, don't let anyone
}
#endif
-static struct block_device_operations sd_fops = {
+static const struct block_device_operations sd_fops = {
.owner = THIS_MODULE,
.open = sd_open,
.release = sd_release,
- .ioctl = sd_ioctl,
+ .locked_ioctl = sd_ioctl,
.getgeo = sd_getgeo,
#ifdef CONFIG_COMPAT
.compat_ioctl = sd_compat_ioctl,
.revalidate_disk = sd_revalidate_disk,
};
+static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd)
+{
+ u64 start_lba = blk_rq_pos(scmd->request);
+ u64 end_lba = blk_rq_pos(scmd->request) + (scsi_bufflen(scmd) / 512);
+ u64 bad_lba;
+ int info_valid;
+
+ if (!blk_fs_request(scmd->request))
+ return 0;
+
+ info_valid = scsi_get_sense_info_fld(scmd->sense_buffer,
+ SCSI_SENSE_BUFFERSIZE,
+ &bad_lba);
+ if (!info_valid)
+ return 0;
+
+ if (scsi_bufflen(scmd) <= scmd->device->sector_size)
+ return 0;
+
+ if (scmd->device->sector_size < 512) {
+ /* only legitimate sector_size here is 256 */
+ start_lba <<= 1;
+ end_lba <<= 1;
+ } else {
+ /* be careful ... don't want any overflows */
+ u64 factor = scmd->device->sector_size / 512;
+ do_div(start_lba, factor);
+ do_div(end_lba, factor);
+ }
+
+ /* The bad lba was reported incorrectly, we have no idea where
+ * the error is.
+ */
+ if (bad_lba < start_lba || bad_lba >= end_lba)
+ return 0;
+
+ /* This computation should always be done in terms of
+ * the resolution of the device's medium.
+ */
+ return (bad_lba - start_lba) * scmd->device->sector_size;
+}
+
/**
* sd_done - bottom half handler: called when the lower level
* driver has completed (successfully or otherwise) a scsi command.
static int sd_done(struct scsi_cmnd *SCpnt)
{
int result = SCpnt->result;
- unsigned int xfer_size = scsi_bufflen(SCpnt);
- unsigned int good_bytes = result ? 0 : xfer_size;
- u64 start_lba = SCpnt->request->sector;
- u64 end_lba = SCpnt->request->sector + (xfer_size / 512);
- u64 bad_lba;
+ unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt);
struct scsi_sense_hdr sshdr;
+ struct scsi_disk *sdkp = scsi_disk(SCpnt->request->rq_disk);
int sense_valid = 0;
int sense_deferred = 0;
- int info_valid;
if (result) {
sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr);
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;
- if (SCpnt->device->sector_size < 512) {
- /* only legitimate sector_size here is 256 */
- start_lba <<= 1;
- end_lba <<= 1;
- } else {
- /* be careful ... don't want any overflows */
- u64 factor = SCpnt->device->sector_size / 512;
- do_div(start_lba, factor);
- do_div(end_lba, factor);
- }
-
- if (bad_lba < start_lba || bad_lba >= end_lba)
- /* the bad lba was reported incorrectly, we have
- * no idea where the error is
- */
- goto out;
-
- /* 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;
+ good_bytes = sd_completed_bytes(SCpnt);
break;
case RECOVERED_ERROR:
+ good_bytes = scsi_bufflen(SCpnt);
+ break;
case NO_SENSE:
- /* Inform the user, but make sure that it's not treated
- * as a hard error.
+ /* This indicates a false check condition, so ignore it. An
+ * unknown amount of data was transferred so treat it as an
+ * 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;
+ case ABORTED_COMMAND: /* DIF: Target detected corruption */
+ case ILLEGAL_REQUEST: /* DIX: Host detected corruption */
+ if (sshdr.asc == 0x10)
+ good_bytes = sd_completed_bytes(SCpnt);
break;
default:
break;
}
out:
+ if (rq_data_dir(SCpnt->request) == READ && scsi_prot_sg_count(SCpnt))
+ sd_dif_complete(SCpnt, good_bytes);
+
+ if (scsi_host_dif_capable(sdkp->device->host, sdkp->protection_type)
+ == SD_DIF_TYPE2_PROTECTION && SCpnt->cmnd != SCpnt->request->cmd) {
+
+ /* We have to print a failed command here as the
+ * extended CDB gets freed before scsi_io_completion()
+ * is called.
+ */
+ if (result)
+ scsi_print_command(SCpnt);
+
+ mempool_free(SCpnt->cmnd, sd_cdb_pool);
+ SCpnt->cmnd = NULL;
+ SCpnt->cmd_len = 0;
+ }
+
return good_bytes;
}
the_result = scsi_execute_req(sdkp->device, cmd,
DMA_NONE, NULL, 0,
&sshdr, SD_TIMEOUT,
- SD_MAX_RETRIES);
+ SD_MAX_RETRIES, NULL);
/*
* If the drive has indicated to us that it
/*
* The device does not want the automatic start to be issued.
*/
- if (sdkp->device->no_start_on_add) {
+ if (sdkp->device->no_start_on_add)
break;
- }
- /*
- * If manual intervention is required, or this is an
- * absent USB storage device, a spinup is meaningless.
- */
- 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 (sense_valid && sshdr.sense_key == NOT_READY) {
+ if (sense_valid && sshdr.sense_key == NOT_READY) {
+ if (sshdr.asc == 4 && sshdr.ascq == 3)
+ break; /* manual intervention required */
+ if (sshdr.asc == 4 && sshdr.ascq == 0xb)
+ break; /* standby */
+ if (sshdr.asc == 4 && sshdr.ascq == 0xc)
+ break; /* unavailable */
+ /*
+ * Issue command to spin up drive when not ready
+ */
if (!spintime) {
sd_printk(KERN_NOTICE, sdkp, "Spinning up disk...");
cmd[0] = START_STOP;
cmd[1] = 1; /* Return immediately */
memset((void *) &cmd[2], 0, 8);
cmd[4] = 1; /* Start spin cycle */
+ if (sdkp->device->start_stop_pwr_cond)
+ cmd[4] |= 1 << 4;
scsi_execute_req(sdkp->device, cmd, DMA_NONE,
NULL, 0, &sshdr,
- SD_TIMEOUT, SD_MAX_RETRIES);
+ SD_TIMEOUT, SD_MAX_RETRIES,
+ NULL);
spintime_expire = jiffies + 100 * HZ;
spintime = 1;
}
}
}
+
/*
- * read disk capacity
+ * Determine whether disk supports Data Integrity Field.
*/
-static void
-sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer)
+void sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer)
+{
+ struct scsi_device *sdp = sdkp->device;
+ u8 type;
+
+ if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0)
+ return;
+
+ type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */
+
+ if (type == sdkp->protection_type || !sdkp->first_scan)
+ return;
+
+ sdkp->protection_type = type;
+
+ if (type > SD_DIF_TYPE3_PROTECTION) {
+ sd_printk(KERN_ERR, sdkp, "formatted with unsupported " \
+ "protection type %u. Disabling disk!\n", type);
+ sdkp->capacity = 0;
+ return;
+ }
+
+ if (scsi_host_dif_capable(sdp->host, type))
+ sd_printk(KERN_NOTICE, sdkp,
+ "Enabling DIF Type %u protection\n", type);
+ else
+ sd_printk(KERN_NOTICE, sdkp,
+ "Disabling DIF Type %u protection\n", type);
+}
+
+static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp,
+ struct scsi_sense_hdr *sshdr, int sense_valid,
+ int the_result)
+{
+ sd_print_result(sdkp, the_result);
+ if (driver_byte(the_result) & DRIVER_SENSE)
+ sd_print_sense_hdr(sdkp, sshdr);
+ else
+ sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n");
+
+ /*
+ * Set dirty bit for removable devices if not ready -
+ * sometimes drives will not report this properly.
+ */
+ if (sdp->removable &&
+ sense_valid && sshdr->sense_key == NOT_READY)
+ sdp->changed = 1;
+
+ /*
+ * We used to set media_present to 0 here to indicate no media
+ * in the drive, but some drives fail read capacity even with
+ * media present, so we can't do that.
+ */
+ sdkp->capacity = 0; /* unknown mapped to zero - as usual */
+}
+
+#define RC16_LEN 32
+#if RC16_LEN > SD_BUF_SIZE
+#error RC16_LEN must not be more than SD_BUF_SIZE
+#endif
+
+#define READ_CAPACITY_RETRIES_ON_RESET 10
+
+static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp,
+ unsigned char *buffer)
{
unsigned char cmd[16];
- 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;
+ int the_result;
+ int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET;
+ unsigned int alignment;
+ unsigned long long lba;
+ unsigned sector_size;
-repeat:
- retries = 3;
do {
- if (longrc) {
- memset((void *) cmd, 0, 16);
- cmd[0] = SERVICE_ACTION_IN;
- cmd[1] = SAI_READ_CAPACITY_16;
- cmd[13] = 12;
- memset((void *) buffer, 0, 12);
- } else {
- cmd[0] = READ_CAPACITY;
- memset((void *) &cmd[1], 0, 9);
- memset((void *) buffer, 0, 8);
+ memset(cmd, 0, 16);
+ cmd[0] = SERVICE_ACTION_IN;
+ cmd[1] = SAI_READ_CAPACITY_16;
+ cmd[13] = RC16_LEN;
+ memset(buffer, 0, RC16_LEN);
+
+ the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE,
+ buffer, RC16_LEN, &sshdr,
+ SD_TIMEOUT, SD_MAX_RETRIES, NULL);
+
+ if (media_not_present(sdkp, &sshdr))
+ return -ENODEV;
+
+ if (the_result) {
+ sense_valid = scsi_sense_valid(&sshdr);
+ if (sense_valid &&
+ sshdr.sense_key == ILLEGAL_REQUEST &&
+ (sshdr.asc == 0x20 || sshdr.asc == 0x24) &&
+ sshdr.ascq == 0x00)
+ /* Invalid Command Operation Code or
+ * Invalid Field in CDB, just retry
+ * silently with RC10 */
+ return -EINVAL;
+ if (sense_valid &&
+ sshdr.sense_key == UNIT_ATTENTION &&
+ sshdr.asc == 0x29 && sshdr.ascq == 0x00)
+ /* Device reset might occur several times,
+ * give it one more chance */
+ if (--reset_retries > 0)
+ continue;
}
-
+ retries--;
+
+ } while (the_result && retries);
+
+ if (the_result) {
+ sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY(16) failed\n");
+ read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result);
+ return -EINVAL;
+ }
+
+ sector_size = get_unaligned_be32(&buffer[8]);
+ lba = get_unaligned_be64(&buffer[0]);
+
+ sd_read_protection_type(sdkp, buffer);
+
+ if ((sizeof(sdkp->capacity) == 4) && (lba >= 0xffffffffULL)) {
+ sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a "
+ "kernel compiled with support for large block "
+ "devices.\n");
+ sdkp->capacity = 0;
+ return -EOVERFLOW;
+ }
+
+ /* Logical blocks per physical block exponent */
+ sdkp->hw_sector_size = (1 << (buffer[13] & 0xf)) * sector_size;
+
+ /* Lowest aligned logical block */
+ alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size;
+ blk_queue_alignment_offset(sdp->request_queue, alignment);
+ if (alignment && sdkp->first_scan)
+ sd_printk(KERN_NOTICE, sdkp,
+ "physical block alignment offset: %u\n", alignment);
+
+ if (buffer[14] & 0x80) { /* TPE */
+ struct request_queue *q = sdp->request_queue;
+
+ sdkp->thin_provisioning = 1;
+ q->limits.discard_granularity = sdkp->hw_sector_size;
+ q->limits.max_discard_sectors = 0xffffffff;
+
+ if (buffer[14] & 0x40) /* TPRZ */
+ q->limits.discard_zeroes_data = 1;
+
+ queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q);
+ }
+
+ sdkp->capacity = lba + 1;
+ return sector_size;
+}
+
+static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp,
+ unsigned char *buffer)
+{
+ unsigned char cmd[16];
+ struct scsi_sense_hdr sshdr;
+ int sense_valid = 0;
+ int the_result;
+ int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET;
+ sector_t lba;
+ unsigned sector_size;
+
+ do {
+ cmd[0] = READ_CAPACITY;
+ memset(&cmd[1], 0, 9);
+ memset(buffer, 0, 8);
+
the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE,
- buffer, longrc ? 12 : 8, &sshdr,
- SD_TIMEOUT, SD_MAX_RETRIES);
+ buffer, 8, &sshdr,
+ SD_TIMEOUT, SD_MAX_RETRIES, NULL);
if (media_not_present(sdkp, &sshdr))
- return;
+ return -ENODEV;
- if (the_result)
+ if (the_result) {
sense_valid = scsi_sense_valid(&sshdr);
+ if (sense_valid &&
+ sshdr.sense_key == UNIT_ATTENTION &&
+ sshdr.asc == 0x29 && sshdr.ascq == 0x00)
+ /* Device reset might occur several times,
+ * give it one more chance */
+ if (--reset_retries > 0)
+ continue;
+ }
retries--;
} while (the_result && retries);
- if (the_result && !longrc) {
+ if (the_result) {
sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY failed\n");
- sd_print_result(sdkp, the_result);
- if (driver_byte(the_result) & DRIVER_SENSE)
- sd_print_sense_hdr(sdkp, &sshdr);
- else
- sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n");
+ read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result);
+ return -EINVAL;
+ }
- /* Set dirty bit for removable devices if not ready -
- * sometimes drives will not report this properly. */
- if (sdp->removable &&
- sense_valid && sshdr.sense_key == NOT_READY)
- sdp->changed = 1;
+ sector_size = get_unaligned_be32(&buffer[4]);
+ lba = get_unaligned_be32(&buffer[0]);
- /* 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 = 0; /* unknown mapped to zero - as usual */
+ if ((sizeof(sdkp->capacity) == 4) && (lba == 0xffffffff)) {
+ sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a "
+ "kernel compiled with support for large block "
+ "devices.\n");
+ sdkp->capacity = 0;
+ return -EOVERFLOW;
+ }
- return;
- } else if (the_result && longrc) {
- /* READ CAPACITY(16) has been failed */
- sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY(16) failed\n");
- sd_print_result(sdkp, the_result);
- sd_printk(KERN_NOTICE, sdkp, "Use 0xffffffff as device size\n");
+ sdkp->capacity = lba + 1;
+ sdkp->hw_sector_size = sector_size;
+ return sector_size;
+}
- sdkp->capacity = 1 + (sector_t) 0xffffffff;
- goto got_data;
- }
-
- if (!longrc) {
- sector_size = (buffer[4] << 24) |
- (buffer[5] << 16) | (buffer[6] << 8) | buffer[7];
- if (buffer[0] == 0xff && buffer[1] == 0xff &&
- buffer[2] == 0xff && buffer[3] == 0xff) {
- if(sizeof(sdkp->capacity) > 4) {
- sd_printk(KERN_NOTICE, sdkp, "Very big device. "
- "Trying to use READ CAPACITY(16).\n");
- longrc = 1;
- goto repeat;
- }
- sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use "
- "a kernel compiled with support for large "
- "block devices.\n");
- sdkp->capacity = 0;
+static int sd_try_rc16_first(struct scsi_device *sdp)
+{
+ if (sdp->host->max_cmd_len < 16)
+ return 0;
+ if (sdp->scsi_level > SCSI_SPC_2)
+ return 1;
+ if (scsi_device_protection(sdp))
+ return 1;
+ return 0;
+}
+
+/*
+ * read disk capacity
+ */
+static void
+sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer)
+{
+ int sector_size;
+ struct scsi_device *sdp = sdkp->device;
+ sector_t old_capacity = sdkp->capacity;
+
+ if (sd_try_rc16_first(sdp)) {
+ sector_size = read_capacity_16(sdkp, sdp, buffer);
+ if (sector_size == -EOVERFLOW)
goto got_data;
- }
- sdkp->capacity = 1 + (((sector_t)buffer[0] << 24) |
- (buffer[1] << 16) |
- (buffer[2] << 8) |
- buffer[3]);
+ if (sector_size == -ENODEV)
+ return;
+ if (sector_size < 0)
+ sector_size = read_capacity_10(sdkp, sdp, buffer);
+ if (sector_size < 0)
+ return;
} else {
- sdkp->capacity = 1 + (((u64)buffer[0] << 56) |
- ((u64)buffer[1] << 48) |
- ((u64)buffer[2] << 40) |
- ((u64)buffer[3] << 32) |
- ((sector_t)buffer[4] << 24) |
- ((sector_t)buffer[5] << 16) |
- ((sector_t)buffer[6] << 8) |
- (sector_t)buffer[7]);
-
- sector_size = (buffer[8] << 24) |
- (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;
+ sector_size = read_capacity_10(sdkp, sdp, buffer);
+ if (sector_size == -EOVERFLOW)
+ goto got_data;
+ if (sector_size < 0)
+ return;
+ if ((sizeof(sdkp->capacity) > 4) &&
+ (sdkp->capacity > 0xffffffffULL)) {
+ int old_sector_size = sector_size;
+ sd_printk(KERN_NOTICE, sdkp, "Very big device. "
+ "Trying to use READ CAPACITY(16).\n");
+ sector_size = read_capacity_16(sdkp, sdp, buffer);
+ if (sector_size < 0) {
+ sd_printk(KERN_NOTICE, sdkp,
+ "Using 0xffffffff as device size\n");
+ sdkp->capacity = 1 + (sector_t) 0xffffffff;
+ sector_size = old_sector_size;
+ goto got_data;
+ }
+ }
+ }
- /* Some devices have version which report the correct sizes
- * and others which do not. We guess size according to a heuristic
- * and err on the side of lowering the capacity. */
- } else {
- if (sdp->guess_capacity)
- if (sdkp->capacity & 0x01) /* odd sizes are odd */
- --sdkp->capacity;
+ /* Some devices are known to return the total number of blocks,
+ * not the highest block number. Some devices have versions
+ * which do this and others which do not. Some devices we might
+ * suspect of doing this but we don't know for certain.
+ *
+ * If we know the reported capacity is wrong, decrement it. If
+ * we can only guess, then assume the number of blocks is even
+ * (usually true but not always) and err on the side of lowering
+ * the capacity.
+ */
+ if (sdp->fix_capacity ||
+ (sdp->guess_capacity && (sdkp->capacity & 0x01))) {
+ sd_printk(KERN_INFO, sdkp, "Adjusting the sector count "
+ "from its reported value: %llu\n",
+ (unsigned long long) sdkp->capacity);
+ --sdkp->capacity;
}
got_data:
*/
sector_size = 512;
}
+ blk_queue_logical_block_size(sdp->request_queue, sector_size);
+
{
- /*
- * The msdos fs needs to know the hardware sector size
- * So I have created this table. See ll_rw_blk.c
- * Jacques Gelinas (Jacques@solucorp.qc.ca)
- */
- int hard_sector = sector_size;
- sector_t sz = (sdkp->capacity/2) * (hard_sector/256);
- struct request_queue *queue = sdp->request_queue;
- sector_t mb = sz;
+ char cap_str_2[10], cap_str_10[10];
+ u64 sz = (u64)sdkp->capacity << ilog2(sector_size);
- blk_queue_hardsect_size(queue, hard_sector);
- /* avoid 64-bit division on 32-bit platforms */
- sector_div(sz, 625);
- mb -= sz - 974;
- sector_div(mb, 1950);
+ string_get_size(sz, STRING_UNITS_2, cap_str_2,
+ sizeof(cap_str_2));
+ string_get_size(sz, STRING_UNITS_10, cap_str_10,
+ sizeof(cap_str_10));
- sd_printk(KERN_NOTICE, sdkp,
- "%llu %d-byte hardware sectors (%llu MB)\n",
- (unsigned long long)sdkp->capacity,
- hard_sector, (unsigned long long)mb);
+ if (sdkp->first_scan || old_capacity != sdkp->capacity) {
+ sd_printk(KERN_NOTICE, sdkp,
+ "%llu %d-byte logical blocks: (%s/%s)\n",
+ (unsigned long long)sdkp->capacity,
+ sector_size, cap_str_10, cap_str_2);
+
+ if (sdkp->hw_sector_size != sector_size)
+ sd_printk(KERN_NOTICE, sdkp,
+ "%u-byte physical blocks\n",
+ sdkp->hw_sector_size);
+ }
}
/* Rescale capacity to 512-byte units */
else if (sector_size == 256)
sdkp->capacity >>= 1;
+ blk_queue_physical_block_size(sdp->request_queue, sdkp->hw_sector_size);
sdkp->device->sector_size = sector_size;
}
int res;
struct scsi_device *sdp = sdkp->device;
struct scsi_mode_data data;
+ int old_wp = sdkp->write_prot;
set_disk_ro(sdkp->disk, 0);
if (sdp->skip_ms_page_3f) {
} else {
sdkp->write_prot = ((data.device_specific & 0x80) != 0);
set_disk_ro(sdkp->disk, sdkp->write_prot);
- sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n",
- sdkp->write_prot ? "on" : "off");
- sd_printk(KERN_DEBUG, sdkp,
- "Mode Sense: %02x %02x %02x %02x\n",
- buffer[0], buffer[1], buffer[2], buffer[3]);
+ if (sdkp->first_scan || old_wp != sdkp->write_prot) {
+ sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n",
+ sdkp->write_prot ? "on" : "off");
+ sd_printk(KERN_DEBUG, sdkp,
+ "Mode Sense: %02x %02x %02x %02x\n",
+ buffer[0], buffer[1], buffer[2], buffer[3]);
+ }
}
}
int modepage;
struct scsi_mode_data data;
struct scsi_sense_hdr sshdr;
+ int old_wce = sdkp->WCE;
+ int old_rcd = sdkp->RCD;
+ int old_dpofua = sdkp->DPOFUA;
if (sdp->skip_ms_page_8)
goto defaults;
sdkp->DPOFUA = 0;
}
- sd_printk(KERN_NOTICE, sdkp,
- "Write cache: %s, read cache: %s, %s\n",
- sdkp->WCE ? "enabled" : "disabled",
- sdkp->RCD ? "disabled" : "enabled",
- sdkp->DPOFUA ? "supports DPO and FUA"
- : "doesn't support DPO or FUA");
+ if (sdkp->first_scan || old_wce != sdkp->WCE ||
+ old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA)
+ sd_printk(KERN_NOTICE, sdkp,
+ "Write cache: %s, read cache: %s, %s\n",
+ sdkp->WCE ? "enabled" : "disabled",
+ sdkp->RCD ? "disabled" : "enabled",
+ sdkp->DPOFUA ? "supports DPO and FUA"
+ : "doesn't support DPO or FUA");
return;
}
sdkp->DPOFUA = 0;
}
+/*
+ * The ATO bit indicates whether the DIF application tag is available
+ * for use by the operating system.
+ */
+void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer)
+{
+ int res, offset;
+ struct scsi_device *sdp = sdkp->device;
+ struct scsi_mode_data data;
+ struct scsi_sense_hdr sshdr;
+
+ if (sdp->type != TYPE_DISK)
+ return;
+
+ if (sdkp->protection_type == 0)
+ return;
+
+ res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT,
+ SD_MAX_RETRIES, &data, &sshdr);
+
+ if (!scsi_status_is_good(res) || !data.header_length ||
+ data.length < 6) {
+ sd_printk(KERN_WARNING, sdkp,
+ "getting Control mode page failed, assume no ATO\n");
+
+ if (scsi_sense_valid(&sshdr))
+ sd_print_sense_hdr(sdkp, &sshdr);
+
+ return;
+ }
+
+ offset = data.header_length + data.block_descriptor_length;
+
+ if ((buffer[offset] & 0x3f) != 0x0a) {
+ sd_printk(KERN_ERR, sdkp, "ATO Got wrong page\n");
+ return;
+ }
+
+ if ((buffer[offset + 5] & 0x80) == 0)
+ return;
+
+ sdkp->ATO = 1;
+
+ return;
+}
+
+/**
+ * sd_read_block_limits - Query disk device for preferred I/O sizes.
+ * @disk: disk to query
+ */
+static void sd_read_block_limits(struct scsi_disk *sdkp)
+{
+ struct request_queue *q = sdkp->disk->queue;
+ unsigned int sector_sz = sdkp->device->sector_size;
+ const int vpd_len = 64;
+ unsigned char *buffer = kmalloc(vpd_len, GFP_KERNEL);
+
+ if (!buffer ||
+ /* Block Limits VPD */
+ scsi_get_vpd_page(sdkp->device, 0xb0, buffer, vpd_len))
+ goto out;
+
+ blk_queue_io_min(sdkp->disk->queue,
+ get_unaligned_be16(&buffer[6]) * sector_sz);
+ blk_queue_io_opt(sdkp->disk->queue,
+ get_unaligned_be32(&buffer[12]) * sector_sz);
+
+ /* Thin provisioning enabled and page length indicates TP support */
+ if (sdkp->thin_provisioning && buffer[3] == 0x3c) {
+ unsigned int lba_count, desc_count, granularity;
+
+ lba_count = get_unaligned_be32(&buffer[20]);
+ desc_count = get_unaligned_be32(&buffer[24]);
+
+ if (lba_count) {
+ q->limits.max_discard_sectors =
+ lba_count * sector_sz >> 9;
+
+ if (desc_count)
+ sdkp->unmap = 1;
+ }
+
+ granularity = get_unaligned_be32(&buffer[28]);
+
+ if (granularity)
+ q->limits.discard_granularity = granularity * sector_sz;
+
+ if (buffer[32] & 0x80)
+ q->limits.discard_alignment =
+ get_unaligned_be32(&buffer[32]) & ~(1 << 31);
+ }
+
+ out:
+ kfree(buffer);
+}
+
+/**
+ * sd_read_block_characteristics - Query block dev. characteristics
+ * @disk: disk to query
+ */
+static void sd_read_block_characteristics(struct scsi_disk *sdkp)
+{
+ unsigned char *buffer;
+ u16 rot;
+ const int vpd_len = 64;
+
+ buffer = kmalloc(vpd_len, GFP_KERNEL);
+
+ if (!buffer ||
+ /* Block Device Characteristics VPD */
+ scsi_get_vpd_page(sdkp->device, 0xb1, buffer, vpd_len))
+ goto out;
+
+ rot = get_unaligned_be16(&buffer[4]);
+
+ if (rot == 1)
+ queue_flag_set_unlocked(QUEUE_FLAG_NONROT, sdkp->disk->queue);
+
+ out:
+ kfree(buffer);
+}
+
+static int sd_try_extended_inquiry(struct scsi_device *sdp)
+{
+ /*
+ * Although VPD inquiries can go to SCSI-2 type devices,
+ * some USB ones crash on receiving them, and the pages
+ * we currently ask for are for SPC-3 and beyond
+ */
+ if (sdp->scsi_level > SCSI_SPC_2)
+ return 1;
+ return 0;
+}
+
/**
* sd_revalidate_disk - called the first time a new disk is seen,
* performs disk spin up, read_capacity, etc.
goto out;
}
- /* defaults, until the device tells us otherwise */
- sdp->sector_size = 512;
- sdkp->capacity = 0;
- sdkp->media_present = 1;
- sdkp->write_prot = 0;
- sdkp->WCE = 0;
- sdkp->RCD = 0;
-
sd_spinup_disk(sdkp);
/*
*/
if (sdkp->media_present) {
sd_read_capacity(sdkp, buffer);
+
+ if (sd_try_extended_inquiry(sdp)) {
+ sd_read_block_limits(sdkp);
+ sd_read_block_characteristics(sdkp);
+ }
+
sd_read_write_protect_flag(sdkp, buffer);
sd_read_cache_type(sdkp, buffer);
+ sd_read_app_tag_own(sdkp, buffer);
}
+ sdkp->first_scan = 0;
+
/*
* We now have all cache related info, determine how we deal
* with ordered requests. Note that as the current SCSI
}
/**
+ * sd_format_disk_name - format disk name
+ * @prefix: name prefix - ie. "sd" for SCSI disks
+ * @index: index of the disk to format name for
+ * @buf: output buffer
+ * @buflen: length of the output buffer
+ *
+ * SCSI disk names starts at sda. The 26th device is sdz and the
+ * 27th is sdaa. The last one for two lettered suffix is sdzz
+ * which is followed by sdaaa.
+ *
+ * This is basically 26 base counting with one extra 'nil' entry
+ * at the beginning from the second digit on and can be
+ * determined using similar method as 26 base conversion with the
+ * index shifted -1 after each digit is computed.
+ *
+ * CONTEXT:
+ * Don't care.
+ *
+ * RETURNS:
+ * 0 on success, -errno on failure.
+ */
+static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen)
+{
+ const int base = 'z' - 'a' + 1;
+ char *begin = buf + strlen(prefix);
+ char *end = buf + buflen;
+ char *p;
+ int unit;
+
+ p = end - 1;
+ *p = '\0';
+ unit = base;
+ do {
+ if (p == begin)
+ return -EINVAL;
+ *--p = 'a' + (index % unit);
+ index = (index / unit) - 1;
+ } while (index >= 0);
+
+ memmove(begin, p, end - p);
+ memcpy(buf, prefix, strlen(prefix));
+
+ return 0;
+}
+
+/*
+ * The asynchronous part of sd_probe
+ */
+static void sd_probe_async(void *data, async_cookie_t cookie)
+{
+ struct scsi_disk *sdkp = data;
+ struct scsi_device *sdp;
+ struct gendisk *gd;
+ u32 index;
+ struct device *dev;
+
+ sdp = sdkp->device;
+ gd = sdkp->disk;
+ index = sdkp->index;
+ dev = &sdp->sdev_gendev;
+
+ if (index < SD_MAX_DISKS) {
+ gd->major = sd_major((index & 0xf0) >> 4);
+ gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00);
+ gd->minors = SD_MINORS;
+ }
+ gd->fops = &sd_fops;
+ gd->private_data = &sdkp->driver;
+ gd->queue = sdkp->device->request_queue;
+
+ /* defaults, until the device tells us otherwise */
+ sdp->sector_size = 512;
+ sdkp->capacity = 0;
+ sdkp->media_present = 1;
+ sdkp->write_prot = 0;
+ sdkp->WCE = 0;
+ sdkp->RCD = 0;
+ sdkp->ATO = 0;
+ sdkp->first_scan = 1;
+
+ sd_revalidate_disk(gd);
+
+ blk_queue_prep_rq(sdp->request_queue, sd_prep_fn);
+
+ gd->driverfs_dev = &sdp->sdev_gendev;
+ gd->flags = GENHD_FL_EXT_DEVT;
+ if (sdp->removable)
+ gd->flags |= GENHD_FL_REMOVABLE;
+
+ dev_set_drvdata(dev, sdkp);
+ add_disk(gd);
+ sd_dif_config_host(sdkp);
+
+ sd_revalidate_disk(gd);
+
+ sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n",
+ sdp->removable ? "removable " : "");
+ put_device(&sdkp->dev);
+}
+
+/**
* sd_probe - called during driver initialization and whenever a
* new scsi device is attached to the system. It is called once
* for each scsi device (not just disks) present.
if (!sdkp)
goto out;
- gd = alloc_disk(16);
+ gd = alloc_disk(SD_MINORS);
if (!gd)
goto out_free;
- if (!idr_pre_get(&sd_index_idr, GFP_KERNEL))
- goto out_put;
+ do {
+ if (!ida_pre_get(&sd_index_ida, GFP_KERNEL))
+ goto out_put;
- spin_lock(&sd_index_lock);
- error = idr_get_new(&sd_index_idr, NULL, &index);
- spin_unlock(&sd_index_lock);
+ spin_lock(&sd_index_lock);
+ error = ida_get_new(&sd_index_ida, &index);
+ spin_unlock(&sd_index_lock);
+ } while (error == -EAGAIN);
- if (index >= SD_MAX_DISKS)
- error = -EBUSY;
if (error)
goto out_put;
+ error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN);
+ if (error)
+ goto out_free_index;
+
sdkp->device = sdp;
sdkp->driver = &sd_template;
sdkp->disk = gd;
sdkp->openers = 0;
sdkp->previous_state = 1;
- if (!sdp->timeout) {
+ if (!sdp->request_queue->rq_timeout) {
if (sdp->type != TYPE_MOD)
- sdp->timeout = SD_TIMEOUT;
+ blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT);
else
- sdp->timeout = SD_MOD_TIMEOUT;
+ blk_queue_rq_timeout(sdp->request_queue,
+ SD_MOD_TIMEOUT);
}
device_initialize(&sdkp->dev);
sdkp->dev.parent = &sdp->sdev_gendev;
sdkp->dev.class = &sd_disk_class;
- strncpy(sdkp->dev.bus_id, sdp->sdev_gendev.bus_id, BUS_ID_SIZE);
+ dev_set_name(&sdkp->dev, dev_name(&sdp->sdev_gendev));
if (device_add(&sdkp->dev))
- goto out_put;
+ goto out_free_index;
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 + 1) * 26) {
- sprintf(gd->disk_name, "sd%c%c",
- 'a' + index / 26 - 1,'a' + index % 26);
- } else {
- const unsigned int m1 = (index / 26 - 1) / 26 - 1;
- const unsigned int m2 = (index / 26 - 1) % 26;
- const unsigned int m3 = index % 26;
- sprintf(gd->disk_name, "sd%c%c%c",
- 'a' + m1, 'a' + m2, 'a' + m3);
- }
-
- gd->private_data = &sdkp->driver;
- gd->queue = sdkp->device->request_queue;
-
- sd_revalidate_disk(gd);
-
- blk_queue_prep_rq(sdp->request_queue, sd_prep_fn);
-
- gd->driverfs_dev = &sdp->sdev_gendev;
- gd->flags = GENHD_FL_DRIVERFS;
- if (sdp->removable)
- gd->flags |= GENHD_FL_REMOVABLE;
-
- dev_set_drvdata(dev, sdkp);
- add_disk(gd);
-
- sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n",
- sdp->removable ? "removable " : "");
+ get_device(&sdkp->dev); /* prevent release before async_schedule */
+ async_schedule(sd_probe_async, sdkp);
return 0;
+ out_free_index:
+ spin_lock(&sd_index_lock);
+ ida_remove(&sd_index_ida, index);
+ spin_unlock(&sd_index_lock);
out_put:
put_disk(gd);
out_free:
**/
static int sd_remove(struct device *dev)
{
- struct scsi_disk *sdkp = dev_get_drvdata(dev);
+ struct scsi_disk *sdkp;
+ async_synchronize_full();
+ sdkp = dev_get_drvdata(dev);
+ blk_queue_prep_rq(sdkp->device->request_queue, scsi_prep_fn);
device_del(&sdkp->dev);
del_gendisk(sdkp->disk);
sd_shutdown(dev);
struct gendisk *disk = sdkp->disk;
spin_lock(&sd_index_lock);
- idr_remove(&sd_index_idr, sdkp->index);
+ ida_remove(&sd_index_ida, sdkp->index);
spin_unlock(&sd_index_lock);
disk->private_data = NULL;
if (start)
cmd[4] |= 1; /* START */
+ if (sdp->start_stop_pwr_cond)
+ cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */
+
if (!scsi_device_online(sdp))
return -ENODEV;
res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr,
- SD_TIMEOUT, SD_MAX_RETRIES);
+ SD_TIMEOUT, SD_MAX_RETRIES, NULL);
if (res) {
sd_printk(KERN_WARNING, sdkp, "START_STOP FAILED\n");
sd_print_result(sdkp, res);
if (err)
goto err_out_class;
+ sd_cdb_cache = kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE,
+ 0, 0, NULL);
+ if (!sd_cdb_cache) {
+ printk(KERN_ERR "sd: can't init extended cdb cache\n");
+ goto err_out_class;
+ }
+
+ sd_cdb_pool = mempool_create_slab_pool(SD_MEMPOOL_SIZE, sd_cdb_cache);
+ if (!sd_cdb_pool) {
+ printk(KERN_ERR "sd: can't init extended cdb pool\n");
+ goto err_out_cache;
+ }
+
return 0;
+err_out_cache:
+ kmem_cache_destroy(sd_cdb_cache);
+
err_out_class:
class_unregister(&sd_disk_class);
err_out:
SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n"));
+ mempool_destroy(sd_cdb_pool);
+ kmem_cache_destroy(sd_cdb_cache);
+
scsi_unregister_driver(&sd_template.gendrv);
class_unregister(&sd_disk_class);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff