unsigned int max_blocks = 0;
q->limits.discard_zeroes_data = 0;
- q->limits.discard_alignment = sdkp->unmap_alignment *
- logical_block_size;
- q->limits.discard_granularity =
- max(sdkp->physical_block_size,
- sdkp->unmap_granularity * logical_block_size);
+
+ /*
+ * When LBPRZ is reported, discard alignment and granularity
+ * must be fixed to the logical block size. Otherwise the block
+ * layer will drop misaligned portions of the request which can
+ * lead to data corruption. If LBPRZ is not set, we honor the
+ * device preference.
+ */
+ if (sdkp->lbprz) {
+ q->limits.discard_alignment = 0;
+ q->limits.discard_granularity = logical_block_size;
+ } else {
+ q->limits.discard_alignment = sdkp->unmap_alignment *
+ logical_block_size;
+ q->limits.discard_granularity =
+ max(sdkp->physical_block_size,
+ sdkp->unmap_granularity * logical_block_size);
+ }
sdkp->provisioning_mode = mode;
struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk);
struct scsi_device *sdp = sdkp->device;
struct Scsi_Host *host = sdp->host;
+ sector_t capacity = logical_to_sectors(sdp, sdkp->capacity);
int diskinfo[4];
/* default to most commonly used values */
- diskinfo[0] = 0x40; /* 1 << 6 */
- diskinfo[1] = 0x20; /* 1 << 5 */
- diskinfo[2] = sdkp->capacity >> 11;
-
+ diskinfo[0] = 0x40; /* 1 << 6 */
+ diskinfo[1] = 0x20; /* 1 << 5 */
+ diskinfo[2] = capacity >> 11;
+
/* override with calculated, extended default, or driver values */
if (host->hostt->bios_param)
- host->hostt->bios_param(sdp, bdev, sdkp->capacity, diskinfo);
+ host->hostt->bios_param(sdp, bdev, capacity, diskinfo);
else
- scsicam_bios_param(bdev, sdkp->capacity, diskinfo);
+ scsicam_bios_param(bdev, capacity, diskinfo);
geo->heads = diskinfo[0];
geo->sectors = diskinfo[1];
**/
static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing)
{
- struct scsi_disk *sdkp = scsi_disk(disk);
- struct scsi_device *sdp = sdkp->device;
+ struct scsi_disk *sdkp = scsi_disk_get(disk);
+ struct scsi_device *sdp;
struct scsi_sense_hdr *sshdr = NULL;
int retval;
+ if (!sdkp)
+ return 0;
+
+ sdp = sdkp->device;
SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n"));
/*
kfree(sshdr);
retval = sdp->changed ? DISK_EVENT_MEDIA_CHANGE : 0;
sdp->changed = 0;
+ scsi_disk_put(sdkp);
return retval;
}
}
}
- if (sdkp->capacity > 0xffffffff) {
+ if (sdkp->capacity > 0xffffffff)
sdp->use_16_for_rw = 1;
- sdkp->max_xfer_blocks = SD_MAX_XFER_BLOCKS;
- } else
- sdkp->max_xfer_blocks = SD_DEF_XFER_BLOCKS;
-
- /* Rescale capacity to 512-byte units */
- if (sector_size == 4096)
- sdkp->capacity <<= 3;
- else if (sector_size == 2048)
- sdkp->capacity <<= 2;
- else if (sector_size == 1024)
- sdkp->capacity <<= 1;
blk_queue_physical_block_size(sdp->request_queue,
sdkp->physical_block_size);
{
unsigned int sector_sz = sdkp->device->sector_size;
const int vpd_len = 64;
- u32 max_xfer_length;
unsigned char *buffer = kmalloc(vpd_len, GFP_KERNEL);
if (!buffer ||
scsi_get_vpd_page(sdkp->device, 0xb0, buffer, vpd_len))
goto out;
- max_xfer_length = get_unaligned_be32(&buffer[8]);
- if (max_xfer_length)
- sdkp->max_xfer_blocks = max_xfer_length;
-
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);
+
+ sdkp->max_xfer_blocks = get_unaligned_be32(&buffer[8]);
+ sdkp->opt_xfer_blocks = get_unaligned_be32(&buffer[12]);
if (buffer[3] == 0x3c) {
unsigned int lba_count, desc_count;
{
struct scsi_disk *sdkp = scsi_disk(disk);
struct scsi_device *sdp = sdkp->device;
+ struct request_queue *q = sdkp->disk->queue;
unsigned char *buffer;
- unsigned int max_xfer;
+ unsigned int dev_max, rw_max;
SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp,
"sd_revalidate_disk\n"));
*/
sd_set_flush_flag(sdkp);
- max_xfer = sdkp->max_xfer_blocks;
- max_xfer <<= ilog2(sdp->sector_size) - 9;
+ /* Initial block count limit based on CDB TRANSFER LENGTH field size. */
+ dev_max = sdp->use_16_for_rw ? SD_MAX_XFER_BLOCKS : SD_DEF_XFER_BLOCKS;
+
+ /* Some devices report a maximum block count for READ/WRITE requests. */
+ dev_max = min_not_zero(dev_max, sdkp->max_xfer_blocks);
+ q->limits.max_dev_sectors = logical_to_sectors(sdp, dev_max);
+
+ /*
+ * Use the device's preferred I/O size for reads and writes
+ * unless the reported value is unreasonably small, large, or
+ * garbage.
+ */
+ if (sdkp->opt_xfer_blocks &&
+ sdkp->opt_xfer_blocks <= dev_max &&
+ sdkp->opt_xfer_blocks <= SD_DEF_XFER_BLOCKS &&
+ logical_to_bytes(sdp, sdkp->opt_xfer_blocks) >= PAGE_CACHE_SIZE) {
+ q->limits.io_opt = logical_to_bytes(sdp, sdkp->opt_xfer_blocks);
+ rw_max = logical_to_sectors(sdp, sdkp->opt_xfer_blocks);
+ } else
+ rw_max = BLK_DEF_MAX_SECTORS;
- sdkp->disk->queue->limits.max_sectors =
- min_not_zero(queue_max_hw_sectors(sdkp->disk->queue), max_xfer);
+ /* Combine with controller limits */
+ q->limits.max_sectors = min(rw_max, queue_max_hw_sectors(q));
- set_capacity(disk, sdkp->capacity);
+ set_capacity(disk, logical_to_sectors(sdp, sdkp->capacity));
sd_config_write_same(sdkp);
kfree(buffer);
struct scsi_disk *sdkp = dev_get_drvdata(dev);
int ret = 0;
- if (!sdkp)
- return 0; /* this can happen */
+ if (!sdkp) /* E.g.: runtime suspend following sd_remove() */
+ return 0;
if (sdkp->WCE && sdkp->media_present) {
sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n");
{
struct scsi_disk *sdkp = dev_get_drvdata(dev);
+ if (!sdkp) /* E.g.: runtime resume at the start of sd_probe() */
+ return 0;
+
if (!sdkp->device->manage_start_stop)
return 0;
projects / firefly-linux-kernel-4.4.55.git / blobdiff