diff options
| author | Matthew R. Ochs <mrochs@linux.vnet.ibm.com> | 2015-08-13 21:47:53 -0500 |
|---|---|---|
| committer | James Bottomley <JBottomley@Odin.com> | 2015-08-26 18:05:39 -0700 |
| commit | 2cb79266d6b229dbebd31fe114af1bdab25c8076 (patch) | |
| tree | 1b90c42981d18836586209f618330d9617698eb2 /include/uapi/scsi | |
| parent | 65be2c79acc3aa0f9c0e8d4871f5a451d854465a (diff) | |
cxlflash: Virtual LUN support
Add support for physical LUN segmentation (virtual LUNs) to device
driver supporting the IBM CXL Flash adapter. This patch allows user
space applications to virtually segment a physical LUN into N virtual
LUNs, taking advantage of the translation features provided by this
adapter.
Signed-off-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Signed-off-by: Manoj N. Kumar <manoj@linux.vnet.ibm.com>
Reviewed-by: Michael Neuling <mikey@neuling.org>
Reviewed-by: Wen Xiong <wenxiong@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
Diffstat (limited to 'include/uapi/scsi')
| -rw-r--r-- | include/uapi/scsi/cxlflash_ioctl.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/include/uapi/scsi/cxlflash_ioctl.h b/include/uapi/scsi/cxlflash_ioctl.h index 570773406531..831351b2e660 100644 --- a/include/uapi/scsi/cxlflash_ioctl.h +++ b/include/uapi/scsi/cxlflash_ioctl.h @@ -71,6 +71,17 @@ struct dk_cxlflash_udirect { __u64 reserved[8]; /* Reserved for future use */ }; +#define DK_CXLFLASH_UVIRTUAL_NEED_WRITE_SAME 0x8000000000000000ULL + +struct dk_cxlflash_uvirtual { + struct dk_cxlflash_hdr hdr; /* Common fields */ + __u64 context_id; /* Context to own virtual resources */ + __u64 lun_size; /* Requested size, in 4K blocks */ + __u64 rsrc_handle; /* Returned resource handle */ + __u64 last_lba; /* Returned last LBA of LUN */ + __u64 reserved[8]; /* Reserved for future use */ +}; + struct dk_cxlflash_release { struct dk_cxlflash_hdr hdr; /* Common fields */ __u64 context_id; /* Context owning resources */ @@ -78,6 +89,23 @@ struct dk_cxlflash_release { __u64 reserved[8]; /* Reserved for future use */ }; +struct dk_cxlflash_resize { + struct dk_cxlflash_hdr hdr; /* Common fields */ + __u64 context_id; /* Context owning resources */ + __u64 rsrc_handle; /* Resource handle of LUN to resize */ + __u64 req_size; /* New requested size, in 4K blocks */ + __u64 last_lba; /* Returned last LBA of LUN */ + __u64 reserved[8]; /* Reserved for future use */ +}; + +struct dk_cxlflash_clone { + struct dk_cxlflash_hdr hdr; /* Common fields */ + __u64 context_id_src; /* Context to clone from */ + __u64 context_id_dst; /* Context to clone to */ + __u64 adap_fd_src; /* Source context adapter fd */ + __u64 reserved[8]; /* Reserved for future use */ +}; + #define DK_CXLFLASH_VERIFY_SENSE_LEN 18 #define DK_CXLFLASH_VERIFY_HINT_SENSE 0x8000000000000000ULL @@ -118,7 +146,10 @@ union cxlflash_ioctls { struct dk_cxlflash_attach attach; struct dk_cxlflash_detach detach; struct dk_cxlflash_udirect udirect; + struct dk_cxlflash_uvirtual uvirtual; struct dk_cxlflash_release release; + struct dk_cxlflash_resize resize; + struct dk_cxlflash_clone clone; struct dk_cxlflash_verify verify; struct dk_cxlflash_recover_afu recover_afu; struct dk_cxlflash_manage_lun manage_lun; @@ -136,5 +167,8 @@ union cxlflash_ioctls { #define DK_CXLFLASH_VERIFY CXL_IOWR(0x84, dk_cxlflash_verify) #define DK_CXLFLASH_RECOVER_AFU CXL_IOWR(0x85, dk_cxlflash_recover_afu) #define DK_CXLFLASH_MANAGE_LUN CXL_IOWR(0x86, dk_cxlflash_manage_lun) +#define DK_CXLFLASH_USER_VIRTUAL CXL_IOWR(0x87, dk_cxlflash_uvirtual) +#define DK_CXLFLASH_VLUN_RESIZE CXL_IOWR(0x88, dk_cxlflash_resize) +#define DK_CXLFLASH_VLUN_CLONE CXL_IOWR(0x89, dk_cxlflash_clone) #endif /* ifndef _CXLFLASH_IOCTL_H */ |