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274 lines
6.9 KiB
274 lines
6.9 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _SCSI_DISK_H |
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#define _SCSI_DISK_H |
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/* |
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* More than enough for everybody ;) The huge number of majors |
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* is a leftover from 16bit dev_t days, we don't really need that |
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* much numberspace. |
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*/ |
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#define SD_MAJORS 16 |
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/* |
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* Time out in seconds for disks and Magneto-opticals (which are slower). |
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*/ |
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#define SD_TIMEOUT (30 * HZ) |
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#define SD_MOD_TIMEOUT (75 * HZ) |
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/* |
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* Flush timeout is a multiplier over the standard device timeout which is |
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* user modifiable via sysfs but initially set to SD_TIMEOUT |
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*/ |
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#define SD_FLUSH_TIMEOUT_MULTIPLIER 2 |
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#define SD_WRITE_SAME_TIMEOUT (120 * HZ) |
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/* |
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* Number of allowed retries |
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*/ |
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#define SD_MAX_RETRIES 5 |
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#define SD_PASSTHROUGH_RETRIES 1 |
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#define SD_MAX_MEDIUM_TIMEOUTS 2 |
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/* |
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* Size of the initial data buffer for mode and read capacity data |
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*/ |
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#define SD_BUF_SIZE 512 |
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/* |
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* Number of sectors at the end of the device to avoid multi-sector |
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* accesses to in the case of last_sector_bug |
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*/ |
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#define SD_LAST_BUGGY_SECTORS 8 |
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enum { |
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SD_EXT_CDB_SIZE = 32, /* Extended CDB size */ |
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SD_MEMPOOL_SIZE = 2, /* CDB pool size */ |
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}; |
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enum { |
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SD_DEF_XFER_BLOCKS = 0xffff, |
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SD_MAX_XFER_BLOCKS = 0xffffffff, |
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SD_MAX_WS10_BLOCKS = 0xffff, |
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SD_MAX_WS16_BLOCKS = 0x7fffff, |
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}; |
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enum { |
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SD_LBP_FULL = 0, /* Full logical block provisioning */ |
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SD_LBP_UNMAP, /* Use UNMAP command */ |
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SD_LBP_WS16, /* Use WRITE SAME(16) with UNMAP bit */ |
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SD_LBP_WS10, /* Use WRITE SAME(10) with UNMAP bit */ |
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SD_LBP_ZERO, /* Use WRITE SAME(10) with zero payload */ |
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SD_LBP_DISABLE, /* Discard disabled due to failed cmd */ |
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}; |
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enum { |
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SD_ZERO_WRITE = 0, /* Use WRITE(10/16) command */ |
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SD_ZERO_WS, /* Use WRITE SAME(10/16) command */ |
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SD_ZERO_WS16_UNMAP, /* Use WRITE SAME(16) with UNMAP */ |
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SD_ZERO_WS10_UNMAP, /* Use WRITE SAME(10) with UNMAP */ |
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}; |
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struct scsi_disk { |
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struct scsi_driver *driver; /* always &sd_template */ |
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struct scsi_device *device; |
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struct device dev; |
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struct gendisk *disk; |
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struct opal_dev *opal_dev; |
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#ifdef CONFIG_BLK_DEV_ZONED |
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u32 nr_zones; |
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u32 rev_nr_zones; |
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u32 zone_blocks; |
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u32 rev_zone_blocks; |
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u32 zones_optimal_open; |
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u32 zones_optimal_nonseq; |
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u32 zones_max_open; |
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u32 *zones_wp_offset; |
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spinlock_t zones_wp_offset_lock; |
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u32 *rev_wp_offset; |
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struct mutex rev_mutex; |
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struct work_struct zone_wp_offset_work; |
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char *zone_wp_update_buf; |
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#endif |
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atomic_t openers; |
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sector_t capacity; /* size in logical blocks */ |
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int max_retries; |
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u32 max_xfer_blocks; |
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u32 opt_xfer_blocks; |
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u32 max_ws_blocks; |
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u32 max_unmap_blocks; |
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u32 unmap_granularity; |
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u32 unmap_alignment; |
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u32 index; |
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unsigned int physical_block_size; |
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unsigned int max_medium_access_timeouts; |
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unsigned int medium_access_timed_out; |
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u8 media_present; |
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u8 write_prot; |
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u8 protection_type;/* Data Integrity Field */ |
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u8 provisioning_mode; |
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u8 zeroing_mode; |
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unsigned ATO : 1; /* state of disk ATO bit */ |
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unsigned cache_override : 1; /* temp override of WCE,RCD */ |
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unsigned WCE : 1; /* state of disk WCE bit */ |
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unsigned RCD : 1; /* state of disk RCD bit, unused */ |
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unsigned DPOFUA : 1; /* state of disk DPOFUA bit */ |
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unsigned first_scan : 1; |
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unsigned lbpme : 1; |
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unsigned lbprz : 1; |
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unsigned lbpu : 1; |
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unsigned lbpws : 1; |
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unsigned lbpws10 : 1; |
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unsigned lbpvpd : 1; |
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unsigned ws10 : 1; |
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unsigned ws16 : 1; |
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unsigned rc_basis: 2; |
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unsigned zoned: 2; |
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unsigned urswrz : 1; |
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unsigned security : 1; |
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unsigned ignore_medium_access_errors : 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) |
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{ |
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return container_of(disk->private_data, struct scsi_disk, driver); |
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} |
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#define sd_printk(prefix, sdsk, fmt, a...) \ |
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(sdsk)->disk ? \ |
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sdev_prefix_printk(prefix, (sdsk)->device, \ |
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(sdsk)->disk->disk_name, fmt, ##a) : \ |
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sdev_printk(prefix, (sdsk)->device, fmt, ##a) |
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#define sd_first_printk(prefix, sdsk, fmt, a...) \ |
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do { \ |
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if ((sdsk)->first_scan) \ |
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sd_printk(prefix, sdsk, fmt, ##a); \ |
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} while (0) |
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static inline int scsi_medium_access_command(struct scsi_cmnd *scmd) |
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{ |
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switch (scmd->cmnd[0]) { |
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case READ_6: |
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case READ_10: |
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case READ_12: |
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case READ_16: |
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case SYNCHRONIZE_CACHE: |
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case VERIFY: |
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case VERIFY_12: |
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case VERIFY_16: |
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case WRITE_6: |
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case WRITE_10: |
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case WRITE_12: |
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case WRITE_16: |
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case WRITE_SAME: |
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case WRITE_SAME_16: |
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case UNMAP: |
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return 1; |
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case VARIABLE_LENGTH_CMD: |
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switch (scmd->cmnd[9]) { |
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case READ_32: |
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case VERIFY_32: |
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case WRITE_32: |
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case WRITE_SAME_32: |
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return 1; |
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} |
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} |
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return 0; |
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} |
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static inline sector_t logical_to_sectors(struct scsi_device *sdev, sector_t blocks) |
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{ |
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return blocks << (ilog2(sdev->sector_size) - 9); |
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} |
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static inline unsigned int logical_to_bytes(struct scsi_device *sdev, sector_t blocks) |
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{ |
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return blocks * sdev->sector_size; |
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} |
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static inline sector_t bytes_to_logical(struct scsi_device *sdev, unsigned int bytes) |
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{ |
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return bytes >> ilog2(sdev->sector_size); |
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} |
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static inline sector_t sectors_to_logical(struct scsi_device *sdev, sector_t sector) |
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{ |
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return sector >> (ilog2(sdev->sector_size) - 9); |
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} |
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#ifdef CONFIG_BLK_DEV_INTEGRITY |
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extern void sd_dif_config_host(struct scsi_disk *); |
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#else /* CONFIG_BLK_DEV_INTEGRITY */ |
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static inline void sd_dif_config_host(struct scsi_disk *disk) |
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{ |
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} |
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#endif /* CONFIG_BLK_DEV_INTEGRITY */ |
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static inline int sd_is_zoned(struct scsi_disk *sdkp) |
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{ |
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return sdkp->zoned == 1 || sdkp->device->type == TYPE_ZBC; |
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} |
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#ifdef CONFIG_BLK_DEV_ZONED |
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void sd_zbc_release_disk(struct scsi_disk *sdkp); |
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int sd_zbc_read_zones(struct scsi_disk *sdkp, unsigned char *buffer); |
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int sd_zbc_revalidate_zones(struct scsi_disk *sdkp); |
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blk_status_t sd_zbc_setup_zone_mgmt_cmnd(struct scsi_cmnd *cmd, |
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unsigned char op, bool all); |
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unsigned int sd_zbc_complete(struct scsi_cmnd *cmd, unsigned int good_bytes, |
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struct scsi_sense_hdr *sshdr); |
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int sd_zbc_report_zones(struct gendisk *disk, sector_t sector, |
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unsigned int nr_zones, report_zones_cb cb, void *data); |
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blk_status_t sd_zbc_prepare_zone_append(struct scsi_cmnd *cmd, sector_t *lba, |
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unsigned int nr_blocks); |
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#else /* CONFIG_BLK_DEV_ZONED */ |
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static inline void sd_zbc_release_disk(struct scsi_disk *sdkp) {} |
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static inline int sd_zbc_read_zones(struct scsi_disk *sdkp, |
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unsigned char *buf) |
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{ |
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return 0; |
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} |
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static inline int sd_zbc_revalidate_zones(struct scsi_disk *sdkp) |
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{ |
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return 0; |
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} |
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static inline blk_status_t sd_zbc_setup_zone_mgmt_cmnd(struct scsi_cmnd *cmd, |
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unsigned char op, |
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bool all) |
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{ |
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return BLK_STS_TARGET; |
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} |
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static inline unsigned int sd_zbc_complete(struct scsi_cmnd *cmd, |
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unsigned int good_bytes, struct scsi_sense_hdr *sshdr) |
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{ |
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return good_bytes; |
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} |
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static inline blk_status_t sd_zbc_prepare_zone_append(struct scsi_cmnd *cmd, |
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sector_t *lba, |
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unsigned int nr_blocks) |
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{ |
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return BLK_STS_TARGET; |
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} |
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#define sd_zbc_report_zones NULL |
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#endif /* CONFIG_BLK_DEV_ZONED */ |
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void sd_print_sense_hdr(struct scsi_disk *sdkp, struct scsi_sense_hdr *sshdr); |
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void sd_print_result(const struct scsi_disk *sdkp, const char *msg, int result); |
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#endif /* _SCSI_DISK_H */
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