#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"
#define SD_MAX_RETRIES 5
#define SD_PASSTHROUGH_RETRIES 1
+/*
+ * Size of the initial data buffer for mode and read capacity data
+ */
+#define SD_BUF_SIZE 512
+
static void scsi_disk_release(struct kref *kref);
struct scsi_disk {
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 */
};
static DEFINE_IDR(sd_index_idr);
/* 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_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 struct scsi_driver sd_template = {
.owner = THIS_MODULE,
return container_of(disk->private_data, struct scsi_disk, driver);
}
-static struct scsi_disk *scsi_disk_get(struct gendisk *disk)
+static struct scsi_disk *__scsi_disk_get(struct gendisk *disk)
{
struct scsi_disk *sdkp = NULL;
- down(&sd_ref_sem);
- if (disk->private_data == NULL)
- goto out;
- sdkp = scsi_disk(disk);
- kref_get(&sdkp->kref);
- if (scsi_device_get(sdkp->device))
- goto out_put;
- up(&sd_ref_sem);
+ if (disk->private_data) {
+ sdkp = scsi_disk(disk);
+ if (scsi_device_get(sdkp->device) == 0)
+ kref_get(&sdkp->kref);
+ else
+ sdkp = NULL;
+ }
+ return sdkp;
+}
+
+static struct scsi_disk *scsi_disk_get(struct gendisk *disk)
+{
+ struct scsi_disk *sdkp;
+
+ mutex_lock(&sd_ref_mutex);
+ sdkp = __scsi_disk_get(disk);
+ mutex_unlock(&sd_ref_mutex);
return sdkp;
+}
- out_put:
- kref_put(&sdkp->kref, scsi_disk_release);
- 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;
}
{
struct scsi_device *sdev = sdkp->device;
- down(&sd_ref_sem);
+ mutex_lock(&sd_ref_mutex);
kref_put(&sdkp->kref, scsi_disk_release);
scsi_device_put(sdev);
- up(&sd_ref_sem);
+ 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;
struct request *rq = SCpnt->request;
-
- timeout = sdp->timeout;
-
- /*
- * SG_IO from block layer already setup, just copy cdb basically
- */
- if (blk_pc_request(rq)) {
- 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;
- SCpnt->allowed = SD_PASSTHROUGH_RETRIES;
- goto queue;
- }
-
- /*
- * we only do REQ_CMD and REQ_BLOCK_PC
- */
- if (!blk_fs_request(rq))
- return 0;
-
- disk = rq->rq_disk;
- block = rq->sector;
- this_count = SCpnt->request_bufflen >> 9;
+ 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,
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->transfersize = sdp->sector_size;
SCpnt->underflow = this_count << 9;
SCpnt->allowed = SD_MAX_RETRIES;
-
-queue:
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;
}
if (!scsi_block_when_processing_errors(sdp) || !error)
return error;
- if (cmd == HDIO_GETGEO) {
- if (!arg)
- return -EINVAL;
- return sd_hdio_getgeo(bdev, p);
- }
-
/*
* Send SCSI addressing ioctls directly to mid level, send other
* ioctls to block level and then onto mid level if they can't be
static int sd_sync_cache(struct scsi_device *sdp)
{
- struct scsi_request *sreq;
int retries, res;
+ struct scsi_sense_hdr sshdr;
if (!scsi_device_online(sdp))
return -ENODEV;
- sreq = scsi_allocate_request(sdp, GFP_KERNEL);
- if (!sreq) {
- printk("FAILED\n No memory for request\n");
- return -ENOMEM;
- }
- sreq->sr_data_direction = DMA_NONE;
for (retries = 3; retries > 0; --retries) {
unsigned char cmd[10] = { 0 };
* 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)
+ res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr,
+ SD_TIMEOUT, SD_MAX_RETRIES);
+ if (res == 0)
break;
}
- res = sreq->sr_result;
- if (res) {
- printk(KERN_WARNING "FAILED\n status = %x, message = %02x, "
+ 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_print_sense_hdr("sd", &sshdr);
}
- scsi_release_request(sreq);
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 = dev_get_drvdata(dev);
+ struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev);
if (!sdkp)
return -ENODEV;
- if (!sdkp->WCE)
- return 0;
+ if (sdkp->WCE)
+ ret = sd_sync_cache(sdp);
+ scsi_disk_put(sdkp);
+ return ret;
+}
- return sd_sync_cache(sdp);
+static void sd_prepare_flush(request_queue_t *q, struct request *rq)
+{
+ memset(rq->cmd, 0, sizeof(rq->cmd));
+ rq->flags |= REQ_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_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,
};
relatively rare error condition, no care is taken to avoid
unnecessary additional work such as memcpy's that could be avoided.
*/
-
- /*
- * If SG_IO from block layer then set good_bytes to stop retries;
- * else if errors, check them, and if necessary prepare for
- * (partial) retries.
- */
- if (blk_pc_request(SCpnt->request))
- good_bytes = this_count;
- else if (driver_byte(result) != 0 &&
+ if (driver_byte(result) != 0 &&
sense_valid && !sense_deferred) {
switch (sshdr.sense_key) {
case MEDIUM_ERROR:
scsi_io_completion(SCpnt, good_bytes, block_sectors << 9);
}
-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)
{
- struct scsi_sense_hdr sshdr;
- if (!srp->sr_result)
- return 0;
- if (!(driver_byte(srp->sr_result) & DRIVER_SENSE))
+ if (!scsi_sense_valid(sshdr))
return 0;
/* not invoked for commands that could return deferred errors */
- if (scsi_request_normalize_sense(srp, &sshdr)) {
- if (sshdr.sense_key != NOT_READY &&
- sshdr.sense_key != UNIT_ATTENTION)
- return 0;
- if (sshdr.asc != 0x3A) /* medium not present */
- return 0;
- }
+ if (sshdr->sense_key != NOT_READY &&
+ sshdr->sense_key != UNIT_ATTENTION)
+ return 0;
+ if (sshdr->asc != 0x3A) /* medium not present */
+ return 0;
+
set_media_not_present(sdkp);
return 1;
}
* 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;
cmd[0] = TEST_UNIT_READY;
memset((void *) &cmd[1], 0, 9);
- SRpnt->sr_cmd_len = 0;
- memset(SRpnt->sr_sense_buffer, 0,
- SCSI_SENSE_BUFFERSIZE);
- SRpnt->sr_data_direction = DMA_NONE;
-
- scsi_wait_req (SRpnt, (void *) cmd, (void *) buffer,
- 0/*512*/, SD_TIMEOUT, SD_MAX_RETRIES);
+ the_result = scsi_execute_req(sdkp->device, cmd,
+ DMA_NONE, NULL, 0,
+ &sshdr, SD_TIMEOUT,
+ SD_MAX_RETRIES);
- the_result = SRpnt->sr_result;
if (the_result)
- sense_valid = scsi_request_normalize_sense(
- SRpnt, &sshdr);
+ sense_valid = scsi_sense_valid(&sshdr);
retries++;
} while (retries < 3 &&
(!scsi_status_is_good(the_result) ||
* any media in it, don't bother with any of the rest of
* this crap.
*/
- if (media_not_present(sdkp, SRpnt))
+ if (media_not_present(sdkp, &sshdr))
return;
if ((driver_byte(the_result) & DRIVER_SENSE) == 0) {
cmd[1] = 1; /* Return immediately */
memset((void *) &cmd[2], 0, 8);
cmd[4] = 1; /* Start spin cycle */
- SRpnt->sr_cmd_len = 0;
- memset(SRpnt->sr_sense_buffer, 0,
- SCSI_SENSE_BUFFERSIZE);
-
- 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;
/* Wait 1 second for next try */
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);
+ 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;
- memset(SRpnt->sr_sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
- 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_request_normalize_sense(SRpnt,
- &sshdr);
+ 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);
* 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;
/* 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 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;
+
+ 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;
+ }
- sdkp->WCE = ((buffer[offset] & 0x04) != 0);
- sdkp->RCD = ((buffer[offset] & 0x01) != 0);
+ 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;
+ }
ct = sdkp->RCD + 2*sdkp->WCE;
- printk(KERN_NOTICE "SCSI device %s: drive cache: %s\n",
- diskname, types[ct]);
+ printk(KERN_NOTICE "SCSI device %s: drive cache: %s%s\n",
+ diskname, types[ct],
+ sdkp->DPOFUA ? " w/ FUA" : "");
return;
}
bad_sense:
- if (scsi_request_normalize_sense(SRpnt, &sshdr) &&
+ 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);
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;
}
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);
if (error)
goto out_put;
+ get_device(&sdp->sdev_gendev);
sdkp->device = sdp;
sdkp->driver = &sd_template;
sdkp->disk = gd;
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;
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;
del_gendisk(sdkp->disk);
sd_shutdown(dev);
- down(&sd_ref_sem);
+
+ mutex_lock(&sd_ref_mutex);
+ dev_set_drvdata(dev, NULL);
kref_put(&sdkp->kref, scsi_disk_release);
- up(&sd_ref_sem);
+ mutex_unlock(&sd_ref_mutex);
return 0;
}
* scsi_disk_release - Called to free the scsi_disk structure
* @kref: pointer to embedded kref
*
- * 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().
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 = dev_get_drvdata(dev);
+ struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev);
if (!sdkp)
return; /* this can happen */
- if (!sdkp->WCE)
- return;
-
- printk(KERN_NOTICE "Synchronizing SCSI cache for disk %s: \n",
- sdkp->disk->disk_name);
- sd_sync_cache(sdp);
-}
+ if (sdkp->WCE) {
+ printk(KERN_NOTICE "Synchronizing SCSI cache for disk %s: \n",
+ sdkp->disk->disk_name);
+ sd_sync_cache(sdp);
+ }
+ scsi_disk_put(sdkp);
+}
/**
* init_sd - entry point for this driver (both when built in or when