TTY: serial, remove dead code from 68328
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / scsi / sd.h
blob6ad798bfd52a05b0c45de905756e0898c324e3f0
1 #ifndef _SCSI_DISK_H
2 #define _SCSI_DISK_H
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
12 * This is limited by the naming scheme enforced in sd_probe,
13 * add another character to it if you really need more disks.
15 #define SD_MAX_DISKS (((26 * 26) + 26 + 1) * 26)
18 * Time out in seconds for disks and Magneto-opticals (which are slower).
20 #define SD_TIMEOUT (30 * HZ)
21 #define SD_MOD_TIMEOUT (75 * HZ)
22 #define SD_FLUSH_TIMEOUT (60 * HZ)
25 * Number of allowed retries
27 #define SD_MAX_RETRIES 5
28 #define SD_PASSTHROUGH_RETRIES 1
31 * Size of the initial data buffer for mode and read capacity data
33 #define SD_BUF_SIZE 512
36 * Number of sectors at the end of the device to avoid multi-sector
37 * accesses to in the case of last_sector_bug
39 #define SD_LAST_BUGGY_SECTORS 8
41 enum {
42 SD_EXT_CDB_SIZE = 32, /* Extended CDB size */
43 SD_MEMPOOL_SIZE = 2, /* CDB pool size */
46 enum {
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 */
55 struct 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;
84 #define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev)
86 static inline struct scsi_disk *scsi_disk(struct gendisk *disk)
88 return container_of(disk->private_data, struct scsi_disk, driver);
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)
98 * A DIF-capable target device can be formatted with different
99 * protection schemes. Currently 0 through 3 are defined:
101 * Type 0 is regular (unprotected) I/O
103 * Type 1 defines the contents of the guard and reference tags
105 * Type 2 defines the contents of the guard and reference tags and
106 * uses 32-byte commands to seed the latter
108 * Type 3 defines the contents of the guard tag only
111 enum 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,
119 * Data Integrity Field tuple.
121 struct sd_dif_tuple {
122 __be16 guard_tag; /* Checksum */
123 __be16 app_tag; /* Opaque storage */
124 __be32 ref_tag; /* Target LBA or indirect LBA */
127 #ifdef CONFIG_BLK_DEV_INTEGRITY
129 extern void sd_dif_config_host(struct scsi_disk *);
130 extern int sd_dif_prepare(struct request *rq, sector_t, unsigned int);
131 extern void sd_dif_complete(struct scsi_cmnd *, unsigned int);
133 #else /* CONFIG_BLK_DEV_INTEGRITY */
135 static inline void sd_dif_config_host(struct scsi_disk *disk)
138 static inline int sd_dif_prepare(struct request *rq, sector_t s, unsigned int a)
140 return 0;
142 static inline void sd_dif_complete(struct scsi_cmnd *cmd, unsigned int a)
146 #endif /* CONFIG_BLK_DEV_INTEGRITY */
148 #endif /* _SCSI_DISK_H */