#include <linux/blkpg.h>
#include <linux/delay.h>
#include <linux/mutex.h>
+#include <linux/string_helpers.h>
#include <asm/uaccess.h>
#include <scsi/scsi.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 *);
sd_print_sense_hdr(sdkp, &sshdr);
return -EINVAL;
}
- sd_revalidate_disk(sdkp->disk);
+ revalidate_disk(sdkp->disk);
return count;
}
struct scsi_cmnd *SCpnt;
struct scsi_device *sdp = q->queuedata;
struct gendisk *disk = rq->rq_disk;
+ struct scsi_disk *sdkp;
sector_t block = rq->sector;
+ sector_t threshold;
unsigned int this_count = rq->nr_sectors;
- unsigned int timeout = sdp->timeout;
- int ret;
+ int ret, host_dif;
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 */
}
/*
- * 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));
}
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;
"writing" : "reading", this_count,
rq->nr_sectors));
- SCpnt->cmnd[1] = 0;
-
+ /* Set RDPROTECT/WRPROTECT if disk is formatted with DIF */
+ host_dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type);
+ if (host_dif)
+ SCpnt->cmnd[1] = 1 << 5;
+ else
+ 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[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->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_dif_op(SCpnt, host_dif, scsi_prot_sg_count(SCpnt),
+ sdkp->protection_type);
+
/*
* 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;
}
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
.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 = scmd->request->sector;
+ u64 end_lba = scmd->request->sector + (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;
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:
- 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;
+ good_bytes = scsi_bufflen(SCpnt);
+ break;
+ case NO_SENSE:
+ /* 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);
+ break;
+ case ABORTED_COMMAND:
+ if (sshdr.asc == 0x10) { /* DIF: Disk detected corruption */
+ scsi_print_result(SCpnt);
+ scsi_print_sense("sd", SCpnt);
+ good_bytes = sd_completed_bytes(SCpnt);
+ }
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;
+ if (sshdr.asc == 0x10) { /* DIX: HBA detected corruption */
+ scsi_print_result(SCpnt);
+ scsi_print_sense("sd", SCpnt);
+ 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);
+
return good_bytes;
}
else
type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */
+ sdkp->protection_type = type;
+
switch (type) {
case SD_DIF_TYPE0_PROTECTION:
- sdkp->protection_type = 0;
- break;
-
case SD_DIF_TYPE1_PROTECTION:
case SD_DIF_TYPE3_PROTECTION:
- sdkp->protection_type = type;
break;
case SD_DIF_TYPE2_PROTECTION:
return;
disable:
- sdkp->protection_type = 0;
sdkp->capacity = 0;
}
*/
sector_size = 512;
}
+ blk_queue_hardsect_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",
+ "%llu %d-byte hardware sectors: (%s/%s)\n",
(unsigned long long)sdkp->capacity,
- hard_sector, (unsigned long long)mb);
+ sector_size, cap_str_10, cap_str_2);
}
/* Rescale capacity to 512-byte units */
}
/**
+ * 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 beggining 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;
+}
+
+/**
* 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 (error)
goto out_put;
- error = -EBUSY;
- if (index >= SD_MAX_DISKS)
+ error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN);
+ if (error)
goto out_free_index;
sdkp->device = sdp;
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);
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);
+ 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;
blk_queue_prep_rq(sdp->request_queue, sd_prep_fn);
gd->driverfs_dev = &sdp->sdev_gendev;
- gd->flags = GENHD_FL_DRIVERFS;
+ gd->flags = GENHD_FL_EXT_DEVT | GENHD_FL_DRIVERFS;
if (sdp->removable)
gd->flags |= GENHD_FL_REMOVABLE;
dev_set_drvdata(dev, sdkp);
add_disk(gd);
+ sd_dif_config_host(sdkp);
sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n",
sdp->removable ? "removable " : "");
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff