[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / scsi / sd.h

#ifndef _SCSI_DISK_H
#define _SCSI_DISK_H

/*
 * More than enough for everybody ;)  The huge number of majors
 * is a leftover from 16bit dev_t days, we don't really need that
 * much numberspace.
 */
#define SD_MAJORS	16

/*
 * Time out in seconds for disks and Magneto-opticals (which are slower).
 */
#define SD_TIMEOUT		(30 * HZ)
#define SD_MOD_TIMEOUT		(75 * HZ)
#define SD_FLUSH_TIMEOUT	(60 * HZ)

/*
 * Number of allowed retries
 */
#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
 */
#define SD_BUF_SIZE		512

/*
 * Number of sectors at the end of the device to avoid multi-sector
 * accesses to in the case of last_sector_bug
 */
#define SD_LAST_BUGGY_SECTORS	8

enum {
	SD_EXT_CDB_SIZE = 32,	/* Extended CDB size */
	SD_MEMPOOL_SIZE = 2,	/* CDB pool size */
};

enum {
	SD_LBP_FULL = 0,	/* Full logical block provisioning */
	SD_LBP_UNMAP,		/* Use UNMAP command */
	SD_LBP_WS16,		/* Use WRITE SAME(16) with UNMAP bit */
	SD_LBP_WS10,		/* Use WRITE SAME(10) with UNMAP bit */
	SD_LBP_ZERO,		/* Use WRITE SAME(10) with zero payload */
	SD_LBP_DISABLE,		/* Discard disabled due to failed cmd */
};

struct scsi_disk {
	struct scsi_driver *driver;	/* always &sd_template */
	struct scsi_device *device;
	struct device	dev;
	struct gendisk	*disk;
	atomic_t	openers;
	sector_t	capacity;	/* size in 512-byte sectors */
	u32		max_ws_blocks;
	u32		max_unmap_blocks;
	u32		unmap_granularity;
	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 */
	u8		provisioning_mode;
	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 */
	unsigned	first_scan : 1;
	unsigned	lbpme : 1;
	unsigned	lbprz : 1;
	unsigned	lbpu : 1;
	unsigned	lbpws : 1;
	unsigned	lbpws10 : 1;
	unsigned	lbpvpd : 1;
};
#define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev)

static inline struct scsi_disk *scsi_disk(struct gendisk *disk)
{
	return container_of(disk->private_data, struct scsi_disk, driver);
}

#define sd_printk(prefix, sdsk, fmt, a...)				\
        (sdsk)->disk ?							\
	sdev_printk(prefix, (sdsk)->device, "[%s] " fmt,		\
		    (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:
 *
 * 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,
};

/*
 * Data Integrity Field tuple.
 */
struct sd_dif_tuple {
       __be16 guard_tag;	/* Checksum */
       __be16 app_tag;		/* Opaque storage */
       __be32 ref_tag;		/* Target LBA or indirect LBA */
};

#ifdef CONFIG_BLK_DEV_INTEGRITY

extern void sd_dif_config_host(struct scsi_disk *);
extern void sd_dif_prepare(struct request *rq, sector_t, unsigned int);
extern void sd_dif_complete(struct scsi_cmnd *, unsigned int);

#else /* CONFIG_BLK_DEV_INTEGRITY */

static inline void sd_dif_config_host(struct scsi_disk *disk)
{
}
static inline int sd_dif_prepare(struct request *rq, sector_t s, unsigned int a)
{
	return 0;
}
static inline void sd_dif_complete(struct scsi_cmnd *cmd, unsigned int a)
{
}

#endif /* CONFIG_BLK_DEV_INTEGRITY */

#endif /* _SCSI_DISK_H */
Commit	Line	Data
e73aec82 MP	1	#ifndef _SCSI_DISK_H
	2	#define _SCSI_DISK_H
	3
	4	/*
	5	* More than enough for everybody ;) The huge number of majors
	6	* is a leftover from 16bit dev_t days, we don't really need that
	7	* much numberspace.
	8	*/
	9	#define SD_MAJORS 16
	10
e73aec82 MP	11	/*
	12	* Time out in seconds for disks and Magneto-opticals (which are slower).
	13	*/
	14	#define SD_TIMEOUT (30 * HZ)
	15	#define SD_MOD_TIMEOUT (75 * HZ)
e3b3e624	16	#define SD_FLUSH_TIMEOUT (60 * HZ)
e73aec82 MP	17
	18	/*
	19	* Number of allowed retries
	20	*/
	21	#define SD_MAX_RETRIES 5
	22	#define SD_PASSTHROUGH_RETRIES 1
18a4d0a2	23	#define SD_MAX_MEDIUM_TIMEOUTS 2
e73aec82 MP	24
	25	/*
	26	* Size of the initial data buffer for mode and read capacity data
	27	*/
	28	#define SD_BUF_SIZE 512
	29
18351070 LT	30	/*
	31	* Number of sectors at the end of the device to avoid multi-sector
	32	* accesses to in the case of last_sector_bug
	33	*/
	34	#define SD_LAST_BUGGY_SECTORS 8
	35
4e7392ec MP	36	enum {
	37	SD_EXT_CDB_SIZE = 32, /* Extended CDB size */
	38	SD_MEMPOOL_SIZE = 2, /* CDB pool size */
	39	};
	40
c98a0eb0 MP	41	enum {
	42	SD_LBP_FULL = 0, /* Full logical block provisioning */
	43	SD_LBP_UNMAP, /* Use UNMAP command */
	44	SD_LBP_WS16, /* Use WRITE SAME(16) with UNMAP bit */
	45	SD_LBP_WS10, /* Use WRITE SAME(10) with UNMAP bit */
	46	SD_LBP_ZERO, /* Use WRITE SAME(10) with zero payload */
	47	SD_LBP_DISABLE, /* Discard disabled due to failed cmd */
	48	};
	49
e73aec82 MP	50	struct scsi_disk {
	51	struct scsi_driver driver; / always &sd_template */
	52	struct scsi_device *device;
ee959b00	53	struct device dev;
e73aec82	54	struct gendisk *disk;
409f3499	55	atomic_t openers;
e73aec82	56	sector_t capacity; /* size in 512-byte sectors */
c98a0eb0 MP	57	u32 max_ws_blocks;
	58	u32 max_unmap_blocks;
	59	u32 unmap_granularity;
	60	u32 unmap_alignment;
e73aec82	61	u32 index;
526f7c79	62	unsigned int physical_block_size;
18a4d0a2 MP	63	unsigned int max_medium_access_timeouts;
18a4d0a2 MP	64	unsigned int medium_access_timed_out;
e73aec82 MP	65	u8 media_present;
e73aec82 MP	66	u8 write_prot;
e0597d70	67	u8 protection_type;/* Data Integrity Field */
c98a0eb0	68	u8 provisioning_mode;
e0597d70	69	unsigned ATO : 1; /* state of disk ATO bit */
e73aec82 MP	70	unsigned WCE : 1; /* state of disk WCE bit */
	71	unsigned RCD : 1; /* state of disk RCD bit, unused */
	72	unsigned DPOFUA : 1; /* state of disk DPOFUA bit */
70a9b873	73	unsigned first_scan : 1;
c98a0eb0 MP	74	unsigned lbpme : 1;
	75	unsigned lbprz : 1;
	76	unsigned lbpu : 1;
	77	unsigned lbpws : 1;
	78	unsigned lbpws10 : 1;
	79	unsigned lbpvpd : 1;
e73aec82	80	};
ee959b00	81	#define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev)
e73aec82	82
5b635da1 MP	83	static inline struct scsi_disk scsi_disk(struct gendisk disk)
	84	{
	85	return container_of(disk->private_data, struct scsi_disk, driver);
	86	}
	87
e73aec82 MP	88	#define sd_printk(prefix, sdsk, fmt, a...) \
	89	(sdsk)->disk ? \
	90	sdev_printk(prefix, (sdsk)->device, "[%s] " fmt, \
	91	(sdsk)->disk->disk_name, ##a) : \
	92	sdev_printk(prefix, (sdsk)->device, fmt, ##a)
	93
18a4d0a2 MP	94	static inline int scsi_medium_access_command(struct scsi_cmnd *scmd)
	95	{
	96	switch (scmd->cmnd[0]) {
	97	case READ_6:
	98	case READ_10:
	99	case READ_12:
	100	case READ_16:
	101	case SYNCHRONIZE_CACHE:
	102	case VERIFY:
	103	case VERIFY_12:
	104	case VERIFY_16:
	105	case WRITE_6:
	106	case WRITE_10:
	107	case WRITE_12:
	108	case WRITE_16:
	109	case WRITE_SAME:
	110	case WRITE_SAME_16:
	111	case UNMAP:
	112	return 1;
	113	case VARIABLE_LENGTH_CMD:
	114	switch (scmd->cmnd[9]) {
	115	case READ_32:
	116	case VERIFY_32:
	117	case WRITE_32:
	118	case WRITE_SAME_32:
	119	return 1;
	120	}
	121	}
	122
	123	return 0;
	124	}
	125
e0597d70 MP	126	/*
	127	* A DIF-capable target device can be formatted with different
	128	* protection schemes. Currently 0 through 3 are defined:
	129	*
	130	* Type 0 is regular (unprotected) I/O
	131	*
	132	* Type 1 defines the contents of the guard and reference tags
	133	*
	134	* Type 2 defines the contents of the guard and reference tags and
	135	* uses 32-byte commands to seed the latter
	136	*
	137	* Type 3 defines the contents of the guard tag only
	138	*/
	139
	140	enum sd_dif_target_protection_types {
	141	SD_DIF_TYPE0_PROTECTION = 0x0,
	142	SD_DIF_TYPE1_PROTECTION = 0x1,
	143	SD_DIF_TYPE2_PROTECTION = 0x2,
	144	SD_DIF_TYPE3_PROTECTION = 0x3,
	145	};
	146
af55ff67 MP	147	/*
	148	* Data Integrity Field tuple.
	149	*/
	150	struct sd_dif_tuple {
	151	__be16 guard_tag; /* Checksum */
	152	__be16 app_tag; /* Opaque storage */
	153	__be32 ref_tag; /* Target LBA or indirect LBA */
	154	};
	155
4c393e6e	156	#ifdef CONFIG_BLK_DEV_INTEGRITY
af55ff67	157
af55ff67	158	extern void sd_dif_config_host(struct scsi_disk *);
8c579ab6	159	extern void sd_dif_prepare(struct request *rq, sector_t, unsigned int);
af55ff67 MP	160	extern void sd_dif_complete(struct scsi_cmnd *, unsigned int);
	161
	162	#else /* CONFIG_BLK_DEV_INTEGRITY */
	163
4c393e6e JB	164	static inline void sd_dif_config_host(struct scsi_disk *disk)
	165	{
	166	}
	167	static inline int sd_dif_prepare(struct request *rq, sector_t s, unsigned int a)
	168	{
	169	return 0;
	170	}
	171	static inline void sd_dif_complete(struct scsi_cmnd *cmd, unsigned int a)
	172	{
	173	}
af55ff67 MP	174
	175	#endif /* CONFIG_BLK_DEV_INTEGRITY */
	176
e73aec82	177	#endif /* _SCSI_DISK_H */