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-rw-r--r--drivers/scsi/sd.h35
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/scsi/sd.h b/drivers/scsi/sd.h
index 4163f2910e3d..f703f4827b6f 100644
--- a/drivers/scsi/sd.h
+++ b/drivers/scsi/sd.h
@@ -20,6 +20,7 @@
*/
#define SD_MAX_RETRIES 5
#define SD_PASSTHROUGH_RETRIES 1
+#define SD_MAX_MEDIUM_TIMEOUTS 2
/*
* Size of the initial data buffer for mode and read capacity data
@@ -59,6 +60,8 @@ struct scsi_disk {
u32 unmap_alignment;
u32 index;
unsigned int physical_block_size;
+ unsigned int max_medium_access_timeouts;
+ unsigned int medium_access_timed_out;
u8 media_present;
u8 write_prot;
u8 protection_type;/* Data Integrity Field */
@@ -88,6 +91,38 @@ static inline struct scsi_disk *scsi_disk(struct gendisk *disk)
(sdsk)->disk->disk_name, ##a) : \
sdev_printk(prefix, (sdsk)->device, fmt, ##a)
+static inline int scsi_medium_access_command(struct scsi_cmnd *scmd)
+{
+ switch (scmd->cmnd[0]) {
+ case READ_6:
+ case READ_10:
+ case READ_12:
+ case READ_16:
+ case SYNCHRONIZE_CACHE:
+ case VERIFY:
+ case VERIFY_12:
+ case VERIFY_16:
+ case WRITE_6:
+ case WRITE_10:
+ case WRITE_12:
+ case WRITE_16:
+ case WRITE_SAME:
+ case WRITE_SAME_16:
+ case UNMAP:
+ return 1;
+ case VARIABLE_LENGTH_CMD:
+ switch (scmd->cmnd[9]) {
+ case READ_32:
+ case VERIFY_32:
+ case WRITE_32:
+ case WRITE_SAME_32:
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
/*
* A DIF-capable target device can be formatted with different
* protection schemes. Currently 0 through 3 are defined: