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drivers/scsi/sd.h
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#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 /* |
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* Time out in seconds for disks and Magneto-opticals (which are slower). */ #define SD_TIMEOUT (30 * HZ) #define SD_MOD_TIMEOUT (75 * HZ) |
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#define SD_FLUSH_TIMEOUT (60 * HZ) |
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/* * Number of allowed retries */ #define SD_MAX_RETRIES 5 #define SD_PASSTHROUGH_RETRIES 1 /* * Size of the initial data buffer for mode and read capacity data */ #define SD_BUF_SIZE 512 |
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/* * 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 |
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enum { SD_EXT_CDB_SIZE = 32, /* Extended CDB size */ SD_MEMPOOL_SIZE = 2, /* CDB pool size */ }; |
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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 */ }; |
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struct scsi_disk { struct scsi_driver *driver; /* always &sd_template */ struct scsi_device *device; |
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struct device dev; |
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struct gendisk *disk; |
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atomic_t openers; |
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sector_t capacity; /* size in 512-byte sectors */ |
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u32 max_ws_blocks; u32 max_unmap_blocks; u32 unmap_granularity; u32 unmap_alignment; |
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u32 index; |
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unsigned int physical_block_size; |
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u8 media_present; u8 write_prot; |
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u8 protection_type;/* Data Integrity Field */ |
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u8 provisioning_mode; |
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unsigned ATO : 1; /* state of disk ATO bit */ |
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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 */ |
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unsigned first_scan : 1; |
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unsigned lbpme : 1; unsigned lbprz : 1; unsigned lbpu : 1; unsigned lbpws : 1; unsigned lbpws10 : 1; unsigned lbpvpd : 1; |
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}; |
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#define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev) |
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static inline struct scsi_disk *scsi_disk(struct gendisk *disk) { return container_of(disk->private_data, struct scsi_disk, driver); } |
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#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) |
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/* * 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, }; |
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/* * 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 */ }; |
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#ifdef CONFIG_BLK_DEV_INTEGRITY |
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extern void sd_dif_config_host(struct scsi_disk *); extern int 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 */ |
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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) { } |
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#endif /* CONFIG_BLK_DEV_INTEGRITY */ |
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#endif /* _SCSI_DISK_H */ |