forked from luck/tmp_suning_uos_patched
[SCSI] sd: Identify DIF protection type and application tag ownership
If a disk is formatted with protection information (Inquiry bit PROTECT=1) it is required to support Read Capacity(16). Force use of the 16-bit command in this case and extract the P_TYPE field which indicates whether the disk is formatted using DIF Type 1, 2 or 3. The ATO (App Tag Own) bit in the Control Mode Page indicates whether the storage device or the initiator own the contents of the DIF application tag. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Martin K. Petersen
James Bottomley
parent
511e44f42e
commit
e0597d7001
|
|
@ -233,6 +233,24 @@ sd_show_allow_restart(struct device *dev, struct device_attribute *attr,
|
|||
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 struct device_attribute sd_disk_attrs[] = {
|
||||
__ATTR(cache_type, S_IRUGO|S_IWUSR, sd_show_cache_type,
|
||||
sd_store_cache_type),
|
||||
|
|
@ -241,6 +259,8 @@ static struct device_attribute sd_disk_attrs[] = {
|
|||
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_NULL,
|
||||
};
|
||||
|
||||
|
|
@ -1164,6 +1184,49 @@ sd_spinup_disk(struct scsi_disk *sdkp)
|
|||
}
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Determine whether disk supports Data Integrity Field.
|
||||
*/
|
||||
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)
|
||||
type = 0;
|
||||
else
|
||||
type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */
|
||||
|
||||
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:
|
||||
sd_printk(KERN_ERR, sdkp, "formatted with DIF Type 2 " \
|
||||
"protection which is currently unsupported. " \
|
||||
"Disabling disk!\n");
|
||||
goto disable;
|
||||
|
||||
default:
|
||||
sd_printk(KERN_ERR, sdkp, "formatted with unknown " \
|
||||
"protection type %d. Disabling disk!\n", type);
|
||||
goto disable;
|
||||
}
|
||||
|
||||
return;
|
||||
|
||||
disable:
|
||||
sdkp->protection_type = 0;
|
||||
sdkp->capacity = 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* read disk capacity
|
||||
*/
|
||||
|
|
@ -1173,7 +1236,8 @@ sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer)
|
|||
unsigned char cmd[16];
|
||||
int the_result, retries;
|
||||
int sector_size = 0;
|
||||
int longrc = 0;
|
||||
/* Force READ CAPACITY(16) when PROTECT=1 */
|
||||
int longrc = scsi_device_protection(sdkp->device) ? 1 : 0;
|
||||
struct scsi_sense_hdr sshdr;
|
||||
int sense_valid = 0;
|
||||
struct scsi_device *sdp = sdkp->device;
|
||||
|
|
@ -1185,8 +1249,8 @@ sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer)
|
|||
memset((void *) cmd, 0, 16);
|
||||
cmd[0] = SERVICE_ACTION_IN;
|
||||
cmd[1] = SAI_READ_CAPACITY_16;
|
||||
cmd[13] = 12;
|
||||
memset((void *) buffer, 0, 12);
|
||||
cmd[13] = 13;
|
||||
memset((void *) buffer, 0, 13);
|
||||
} else {
|
||||
cmd[0] = READ_CAPACITY;
|
||||
memset((void *) &cmd[1], 0, 9);
|
||||
|
|
@ -1194,7 +1258,7 @@ sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer)
|
|||
}
|
||||
|
||||
the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE,
|
||||
buffer, longrc ? 12 : 8, &sshdr,
|
||||
buffer, longrc ? 13 : 8, &sshdr,
|
||||
SD_TIMEOUT, SD_MAX_RETRIES);
|
||||
|
||||
if (media_not_present(sdkp, &sshdr))
|
||||
|
|
@ -1269,6 +1333,8 @@ sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer)
|
|||
|
||||
sector_size = (buffer[8] << 24) |
|
||||
(buffer[9] << 16) | (buffer[10] << 8) | buffer[11];
|
||||
|
||||
sd_read_protection_type(sdkp, buffer);
|
||||
}
|
||||
|
||||
/* Some devices return the total number of sectors, not the
|
||||
|
|
@ -1530,6 +1596,52 @@ sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer)
|
|||
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_revalidate_disk - called the first time a new disk is seen,
|
||||
* performs disk spin up, read_capacity, etc.
|
||||
|
|
@ -1566,6 +1678,7 @@ static int sd_revalidate_disk(struct gendisk *disk)
|
|||
sdkp->write_prot = 0;
|
||||
sdkp->WCE = 0;
|
||||
sdkp->RCD = 0;
|
||||
sdkp->ATO = 0;
|
||||
|
||||
sd_spinup_disk(sdkp);
|
||||
|
||||
|
|
@ -1577,6 +1690,7 @@ static int sd_revalidate_disk(struct gendisk *disk)
|
|||
sd_read_capacity(sdkp, buffer);
|
||||
sd_read_write_protect_flag(sdkp, buffer);
|
||||
sd_read_cache_type(sdkp, buffer);
|
||||
sd_read_app_tag_own(sdkp, buffer);
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
|
|||
|
|
@ -41,7 +41,9 @@ struct scsi_disk {
|
|||
u32 index;
|
||||
u8 media_present;
|
||||
u8 write_prot;
|
||||
u8 protection_type;/* Data Integrity Field */
|
||||
unsigned previous_state : 1;
|
||||
unsigned ATO : 1; /* state of disk ATO bit */
|
||||
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 */
|
||||
|
|
@ -59,4 +61,25 @@ static inline struct scsi_disk *scsi_disk(struct gendisk *disk)
|
|||
(sdsk)->disk->disk_name, ##a) : \
|
||||
sdev_printk(prefix, (sdsk)->device, fmt, ##a)
|
||||
|
||||
/*
|
||||
* A DIF-capable target device can be formatted with different
|
||||
* protection schemes. Currently 0 through 3 are defined:
|
||||
*
|
||||
* Type 0 is regular (unprotected) I/O
|
||||
*
|
||||
* Type 1 defines the contents of the guard and reference tags
|
||||
*
|
||||
* Type 2 defines the contents of the guard and reference tags and
|
||||
* uses 32-byte commands to seed the latter
|
||||
*
|
||||
* Type 3 defines the contents of the guard tag only
|
||||
*/
|
||||
|
||||
enum sd_dif_target_protection_types {
|
||||
SD_DIF_TYPE0_PROTECTION = 0x0,
|
||||
SD_DIF_TYPE1_PROTECTION = 0x1,
|
||||
SD_DIF_TYPE2_PROTECTION = 0x2,
|
||||
SD_DIF_TYPE3_PROTECTION = 0x3,
|
||||
};
|
||||
|
||||
#endif /* _SCSI_DISK_H */
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user