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
 11/*
 12 * This is limited by the naming scheme enforced in sd_probe,
 13 * add another character to it if you really need more disks.
 14 */
 15#define SD_MAX_DISKS	(((26 * 26) + 26 + 1) * 26)
 16
 17/*
 18 * Time out in seconds for disks and Magneto-opticals (which are slower).
 19 */
 20#define SD_TIMEOUT		(30 * HZ)
 21#define SD_MOD_TIMEOUT		(75 * HZ)
 22#define SD_FLUSH_TIMEOUT	(60 * HZ)
 
 
 
 
 
 23
 24/*
 25 * Number of allowed retries
 26 */
 27#define SD_MAX_RETRIES		5
 28#define SD_PASSTHROUGH_RETRIES	1
 
 29
 30/*
 31 * Size of the initial data buffer for mode and read capacity data
 32 */
 33#define SD_BUF_SIZE		512
 34
 35/*
 36 * Number of sectors at the end of the device to avoid multi-sector
 37 * accesses to in the case of last_sector_bug
 38 */
 39#define SD_LAST_BUGGY_SECTORS	8
 40
 41enum {
 42	SD_EXT_CDB_SIZE = 32,	/* Extended CDB size */
 43	SD_MEMPOOL_SIZE = 2,	/* CDB pool size */
 44};
 45
 46enum {
 
 
 
 
 
 47	SD_LBP_FULL = 0,	/* Full logical block provisioning */
 48	SD_LBP_UNMAP,		/* Use UNMAP command */
 49	SD_LBP_WS16,		/* Use WRITE SAME(16) with UNMAP bit */
 50	SD_LBP_WS10,		/* Use WRITE SAME(10) with UNMAP bit */
 51	SD_LBP_ZERO,		/* Use WRITE SAME(10) with zero payload */
 52	SD_LBP_DISABLE,		/* Discard disabled due to failed cmd */
 53};
 54
 55struct scsi_disk {
 56	struct scsi_driver *driver;	/* always &sd_template */
 57	struct scsi_device *device;
 58	struct device	dev;
 59	struct gendisk	*disk;
 60	atomic_t	openers;
 61	sector_t	capacity;	/* size in 512-byte sectors */
 62	u32		max_ws_blocks;
 63	u32		max_unmap_blocks;
 64	u32		unmap_granularity;
 65	u32		unmap_alignment;
 66	u32		index;
 67	unsigned int	physical_block_size;
 
 
 68	u8		media_present;
 69	u8		write_prot;
 70	u8		protection_type;/* Data Integrity Field */
 71	u8		provisioning_mode;
 72	unsigned	ATO : 1;	/* state of disk ATO bit */
 
 73	unsigned	WCE : 1;	/* state of disk WCE bit */
 74	unsigned	RCD : 1;	/* state of disk RCD bit, unused */
 75	unsigned	DPOFUA : 1;	/* state of disk DPOFUA bit */
 76	unsigned	first_scan : 1;
 77	unsigned	lbpme : 1;
 78	unsigned	lbprz : 1;
 79	unsigned	lbpu : 1;
 80	unsigned	lbpws : 1;
 81	unsigned	lbpws10 : 1;
 82	unsigned	lbpvpd : 1;
 
 
 83};
 84#define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev)
 85
 86static inline struct scsi_disk *scsi_disk(struct gendisk *disk)
 87{
 88	return container_of(disk->private_data, struct scsi_disk, driver);
 89}
 90
 91#define sd_printk(prefix, sdsk, fmt, a...)				\
 92        (sdsk)->disk ?							\
 93	sdev_printk(prefix, (sdsk)->device, "[%s] " fmt,		\
 94		    (sdsk)->disk->disk_name, ##a) :			\
 95	sdev_printk(prefix, (sdsk)->device, fmt, ##a)
 96
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 97/*
 98 * A DIF-capable target device can be formatted with different
 99 * protection schemes.  Currently 0 through 3 are defined:
100 *
101 * Type 0 is regular (unprotected) I/O
102 *
103 * Type 1 defines the contents of the guard and reference tags
104 *
105 * Type 2 defines the contents of the guard and reference tags and
106 * uses 32-byte commands to seed the latter
107 *
108 * Type 3 defines the contents of the guard tag only
109 */
110
111enum sd_dif_target_protection_types {
112	SD_DIF_TYPE0_PROTECTION = 0x0,
113	SD_DIF_TYPE1_PROTECTION = 0x1,
114	SD_DIF_TYPE2_PROTECTION = 0x2,
115	SD_DIF_TYPE3_PROTECTION = 0x3,
116};
117
118/*
119 * Data Integrity Field tuple.
120 */
121struct sd_dif_tuple {
122       __be16 guard_tag;	/* Checksum */
123       __be16 app_tag;		/* Opaque storage */
124       __be32 ref_tag;		/* Target LBA or indirect LBA */
125};
126
127#ifdef CONFIG_BLK_DEV_INTEGRITY
128
129extern void sd_dif_config_host(struct scsi_disk *);
130extern int sd_dif_prepare(struct request *rq, sector_t, unsigned int);
131extern void sd_dif_complete(struct scsi_cmnd *, unsigned int);
132
133#else /* CONFIG_BLK_DEV_INTEGRITY */
134
135static inline void sd_dif_config_host(struct scsi_disk *disk)
136{
137}
138static inline int sd_dif_prepare(struct request *rq, sector_t s, unsigned int a)
139{
140	return 0;
141}
142static inline void sd_dif_complete(struct scsi_cmnd *cmd, unsigned int a)
143{
144}
145
146#endif /* CONFIG_BLK_DEV_INTEGRITY */
147
148#endif /* _SCSI_DISK_H */

  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
 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)
 16/*
 17 * Flush timeout is a multiplier over the standard device timeout which is
 18 * user modifiable via sysfs but initially set to SD_TIMEOUT
 19 */
 20#define SD_FLUSH_TIMEOUT_MULTIPLIER	2
 21#define SD_WRITE_SAME_TIMEOUT	(120 * HZ)
 22
 23/*
 24 * Number of allowed retries
 25 */
 26#define SD_MAX_RETRIES		5
 27#define SD_PASSTHROUGH_RETRIES	1
 28#define SD_MAX_MEDIUM_TIMEOUTS	2
 29
 30/*
 31 * Size of the initial data buffer for mode and read capacity data
 32 */
 33#define SD_BUF_SIZE		512
 34
 35/*
 36 * Number of sectors at the end of the device to avoid multi-sector
 37 * accesses to in the case of last_sector_bug
 38 */
 39#define SD_LAST_BUGGY_SECTORS	8
 40
 41enum {
 42	SD_EXT_CDB_SIZE = 32,	/* Extended CDB size */
 43	SD_MEMPOOL_SIZE = 2,	/* CDB pool size */
 44};
 45
 46enum {
 47	SD_MAX_WS10_BLOCKS = 0xffff,
 48	SD_MAX_WS16_BLOCKS = 0x7fffff,
 49};
 50
 51enum {
 52	SD_LBP_FULL = 0,	/* Full logical block provisioning */
 53	SD_LBP_UNMAP,		/* Use UNMAP command */
 54	SD_LBP_WS16,		/* Use WRITE SAME(16) with UNMAP bit */
 55	SD_LBP_WS10,		/* Use WRITE SAME(10) with UNMAP bit */
 56	SD_LBP_ZERO,		/* Use WRITE SAME(10) with zero payload */
 57	SD_LBP_DISABLE,		/* Discard disabled due to failed cmd */
 58};
 59
 60struct scsi_disk {
 61	struct scsi_driver *driver;	/* always &sd_template */
 62	struct scsi_device *device;
 63	struct device	dev;
 64	struct gendisk	*disk;
 65	atomic_t	openers;
 66	sector_t	capacity;	/* size in 512-byte sectors */
 67	u32		max_ws_blocks;
 68	u32		max_unmap_blocks;
 69	u32		unmap_granularity;
 70	u32		unmap_alignment;
 71	u32		index;
 72	unsigned int	physical_block_size;
 73	unsigned int	max_medium_access_timeouts;
 74	unsigned int	medium_access_timed_out;
 75	u8		media_present;
 76	u8		write_prot;
 77	u8		protection_type;/* Data Integrity Field */
 78	u8		provisioning_mode;
 79	unsigned	ATO : 1;	/* state of disk ATO bit */
 80	unsigned	cache_override : 1; /* temp override of WCE,RCD */
 81	unsigned	WCE : 1;	/* state of disk WCE bit */
 82	unsigned	RCD : 1;	/* state of disk RCD bit, unused */
 83	unsigned	DPOFUA : 1;	/* state of disk DPOFUA bit */
 84	unsigned	first_scan : 1;
 85	unsigned	lbpme : 1;
 86	unsigned	lbprz : 1;
 87	unsigned	lbpu : 1;
 88	unsigned	lbpws : 1;
 89	unsigned	lbpws10 : 1;
 90	unsigned	lbpvpd : 1;
 91	unsigned	ws10 : 1;
 92	unsigned	ws16 : 1;
 93};
 94#define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev)
 95
 96static inline struct scsi_disk *scsi_disk(struct gendisk *disk)
 97{
 98	return container_of(disk->private_data, struct scsi_disk, driver);
 99}
100
101#define sd_printk(prefix, sdsk, fmt, a...)				\
102        (sdsk)->disk ?							\
103	sdev_printk(prefix, (sdsk)->device, "[%s] " fmt,		\
104		    (sdsk)->disk->disk_name, ##a) :			\
105	sdev_printk(prefix, (sdsk)->device, fmt, ##a)
106
107#define sd_first_printk(prefix, sdsk, fmt, a...)			\
108	do {								\
109		if ((sdkp)->first_scan)					\
110			sd_printk(prefix, sdsk, fmt, ##a);		\
111	} while (0)
112
113static inline int scsi_medium_access_command(struct scsi_cmnd *scmd)
114{
115	switch (scmd->cmnd[0]) {
116	case READ_6:
117	case READ_10:
118	case READ_12:
119	case READ_16:
120	case SYNCHRONIZE_CACHE:
121	case VERIFY:
122	case VERIFY_12:
123	case VERIFY_16:
124	case WRITE_6:
125	case WRITE_10:
126	case WRITE_12:
127	case WRITE_16:
128	case WRITE_SAME:
129	case WRITE_SAME_16:
130	case UNMAP:
131		return 1;
132	case VARIABLE_LENGTH_CMD:
133		switch (scmd->cmnd[9]) {
134		case READ_32:
135		case VERIFY_32:
136		case WRITE_32:
137		case WRITE_SAME_32:
138			return 1;
139		}
140	}
141
142	return 0;
143}
144
145/*
146 * A DIF-capable target device can be formatted with different
147 * protection schemes.  Currently 0 through 3 are defined:
148 *
149 * Type 0 is regular (unprotected) I/O
150 *
151 * Type 1 defines the contents of the guard and reference tags
152 *
153 * Type 2 defines the contents of the guard and reference tags and
154 * uses 32-byte commands to seed the latter
155 *
156 * Type 3 defines the contents of the guard tag only
157 */
158
159enum sd_dif_target_protection_types {
160	SD_DIF_TYPE0_PROTECTION = 0x0,
161	SD_DIF_TYPE1_PROTECTION = 0x1,
162	SD_DIF_TYPE2_PROTECTION = 0x2,
163	SD_DIF_TYPE3_PROTECTION = 0x3,
164};
165
166/*
167 * Data Integrity Field tuple.
168 */
169struct sd_dif_tuple {
170       __be16 guard_tag;	/* Checksum */
171       __be16 app_tag;		/* Opaque storage */
172       __be32 ref_tag;		/* Target LBA or indirect LBA */
173};
174
175#ifdef CONFIG_BLK_DEV_INTEGRITY
176
177extern void sd_dif_config_host(struct scsi_disk *);
178extern void sd_dif_prepare(struct request *rq, sector_t, unsigned int);
179extern void sd_dif_complete(struct scsi_cmnd *, unsigned int);
180
181#else /* CONFIG_BLK_DEV_INTEGRITY */
182
183static inline void sd_dif_config_host(struct scsi_disk *disk)
184{
185}
186static inline int sd_dif_prepare(struct request *rq, sector_t s, unsigned int a)
187{
188	return 0;
189}
190static inline void sd_dif_complete(struct scsi_cmnd *cmd, unsigned int a)
191{
192}
193
194#endif /* CONFIG_BLK_DEV_INTEGRITY */
195
196#endif /* _SCSI_DISK_H */