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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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28a0bc4120
SBC-4 states: "A MAXIMUM UNMAP LBA COUNT field set to a non-zero value indicates the maximum number of LBAs that may be unmapped by an UNMAP command" "A MAXIMUM WRITE SAME LENGTH field set to a non-zero value indicates the maximum number of contiguous logical blocks that the device server allows to be unmapped or written in a single WRITE SAME command." Despite the spec being clear on the topic, some devices incorrectly expect WRITE SAME commands with the UNMAP bit set to be limited to the value reported in MAXIMUM UNMAP LBA COUNT in the Block Limits VPD. Implement a blacklist option that can be used to accommodate devices with this behavior. Cc: <stable@vger.kernel.org> Reported-by: Bill Kuzeja <William.Kuzeja@stratus.com> Reported-by: Ewan D. Milne <emilne@redhat.com> Reviewed-by: Ewan D. Milne <emilne@redhat.com> Tested-by: Laurence Oberman <loberman@redhat.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
35 lines
1.8 KiB
C
35 lines
1.8 KiB
C
#ifndef _SCSI_SCSI_DEVINFO_H
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#define _SCSI_SCSI_DEVINFO_H
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/*
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* Flags for SCSI devices that need special treatment
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*/
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#define BLIST_NOLUN 0x001 /* Only scan LUN 0 */
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#define BLIST_FORCELUN 0x002 /* Known to have LUNs, force scanning,
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deprecated: Use max_luns=N */
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#define BLIST_BORKEN 0x004 /* Flag for broken handshaking */
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#define BLIST_KEY 0x008 /* unlock by special command */
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#define BLIST_SINGLELUN 0x010 /* Do not use LUNs in parallel */
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#define BLIST_NOTQ 0x020 /* Buggy Tagged Command Queuing */
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#define BLIST_SPARSELUN 0x040 /* Non consecutive LUN numbering */
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#define BLIST_MAX5LUN 0x080 /* Avoid LUNS >= 5 */
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#define BLIST_ISROM 0x100 /* Treat as (removable) CD-ROM */
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#define BLIST_LARGELUN 0x200 /* LUNs past 7 on a SCSI-2 device */
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#define BLIST_INQUIRY_36 0x400 /* override additional length field */
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#define BLIST_NOSTARTONADD 0x1000 /* do not do automatic start on add */
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#define BLIST_REPORTLUN2 0x20000 /* try REPORT_LUNS even for SCSI-2 devs
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(if HBA supports more than 8 LUNs) */
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#define BLIST_NOREPORTLUN 0x40000 /* don't try REPORT_LUNS scan (SCSI-3 devs) */
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#define BLIST_NOT_LOCKABLE 0x80000 /* don't use PREVENT-ALLOW commands */
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#define BLIST_NO_ULD_ATTACH 0x100000 /* device is actually for RAID config */
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#define BLIST_SELECT_NO_ATN 0x200000 /* select without ATN */
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#define BLIST_RETRY_HWERROR 0x400000 /* retry HARDWARE_ERROR */
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#define BLIST_MAX_512 0x800000 /* maximum 512 sector cdb length */
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#define BLIST_NO_DIF 0x2000000 /* Disable T10 PI (DIF) */
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#define BLIST_SKIP_VPD_PAGES 0x4000000 /* Ignore SBC-3 VPD pages */
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#define BLIST_TRY_VPD_PAGES 0x10000000 /* Attempt to read VPD pages */
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#define BLIST_NO_RSOC 0x20000000 /* don't try to issue RSOC */
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#define BLIST_MAX_1024 0x40000000 /* maximum 1024 sector cdb length */
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#define BLIST_UNMAP_LIMIT_WS 0x80000000 /* Use UNMAP limit for WRITE SAME */
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#endif
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