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cxlflash_ioctl.h
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/* * CXL Flash Device Driver * * Written by: Manoj N. Kumar <manoj@linux.vnet.ibm.com>, IBM Corporation * Matthew R. Ochs <mrochs@linux.vnet.ibm.com>, IBM Corporation * * Copyright (C) 2015 IBM Corporation * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #ifndef _CXLFLASH_IOCTL_H #define _CXLFLASH_IOCTL_H #include <linux/types.h> /* * Structure and flag definitions CXL Flash superpipe ioctls */ #define DK_CXLFLASH_VERSION_0 0 struct dk_cxlflash_hdr { __u16 version; /* Version data */ __u16 rsvd[3]; /* Reserved for future use */ __u64 flags; /* Input flags */ __u64 return_flags; /* Returned flags */ }; /* * Return flag definitions available to all ioctls * * Similar to the input flags, these are grown from the bottom-up with the * intention that ioctl-specific return flag definitions would grow from the * top-down, allowing the two sets to co-exist. While not required/enforced * at this time, this provides future flexibility. */ #define DK_CXLFLASH_ALL_PORTS_ACTIVE 0x0000000000000001ULL /* * Notes: * ----- * The 'context_id' field of all ioctl structures contains the context * identifier for a context in the lower 32-bits (upper 32-bits are not * to be used when identifying a context to the AFU). That said, the value * in its entirety (all 64-bits) is to be treated as an opaque cookie and * should be presented as such when issuing ioctls. * * For DK_CXLFLASH_ATTACH ioctl, user specifies read/write access * permissions via the O_RDONLY, O_WRONLY, and O_RDWR flags defined in * the fcntl.h header file. */ #define DK_CXLFLASH_ATTACH_REUSE_CONTEXT 0x8000000000000000ULL struct dk_cxlflash_attach { struct dk_cxlflash_hdr hdr; /* Common fields */ __u64 num_interrupts; /* Requested number of interrupts */ __u64 context_id; /* Returned context */ __u64 mmio_size; /* Returned size of MMIO area */ __u64 block_size; /* Returned block size, in bytes */ __u64 adap_fd; /* Returned adapter file descriptor */ __u64 last_lba; /* Returned last LBA on the device */ __u64 max_xfer; /* Returned max transfer size, blocks */ __u64 reserved[8]; /* Reserved for future use */ }; struct dk_cxlflash_detach { struct dk_cxlflash_hdr hdr; /* Common fields */ __u64 context_id; /* Context to detach */ __u64 reserved[8]; /* Reserved for future use */ }; struct dk_cxlflash_udirect { struct dk_cxlflash_hdr hdr; /* Common fields */ __u64 context_id; /* Context to own physical resources */ __u64 rsrc_handle; /* Returned resource handle */ __u64 last_lba; /* Returned last LBA on the device */ __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 */ __u64 rsrc_handle; /* Resource handle to 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 struct dk_cxlflash_verify { struct dk_cxlflash_hdr hdr; /* Common fields */ __u64 context_id; /* Context owning resources to verify */ __u64 rsrc_handle; /* Resource handle of LUN */ __u64 hint; /* Reasons for verify */ __u64 last_lba; /* Returned last LBA of device */ __u8 sense_data[DK_CXLFLASH_VERIFY_SENSE_LEN]; /* SCSI sense data */ __u8 pad[6]; /* Pad to next 8-byte boundary */ __u64 reserved[8]; /* Reserved for future use */ }; #define DK_CXLFLASH_RECOVER_AFU_CONTEXT_RESET 0x8000000000000000ULL struct dk_cxlflash_recover_afu { struct dk_cxlflash_hdr hdr; /* Common fields */ __u64 reason; /* Reason for recovery request */ __u64 context_id; /* Context to recover / updated ID */ __u64 mmio_size; /* Returned size of MMIO area */ __u64 adap_fd; /* Returned adapter file descriptor */ __u64 reserved[8]; /* Reserved for future use */ }; #define DK_CXLFLASH_MANAGE_LUN_WWID_LEN 16 #define DK_CXLFLASH_MANAGE_LUN_ENABLE_SUPERPIPE 0x8000000000000000ULL #define DK_CXLFLASH_MANAGE_LUN_DISABLE_SUPERPIPE 0x4000000000000000ULL #define DK_CXLFLASH_MANAGE_LUN_ALL_PORTS_ACCESSIBLE 0x2000000000000000ULL struct dk_cxlflash_manage_lun { struct dk_cxlflash_hdr hdr; /* Common fields */ __u8 wwid[DK_CXLFLASH_MANAGE_LUN_WWID_LEN]; /* Page83 WWID, NAA-6 */ __u64 reserved[8]; /* Rsvd, future use */ }; 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; }; #define MAX_CXLFLASH_IOCTL_SZ (sizeof(union cxlflash_ioctls)) #define CXL_MAGIC 0xCA #define CXL_IOWR(_n, _s) _IOWR(CXL_MAGIC, _n, struct _s) #define DK_CXLFLASH_ATTACH CXL_IOWR(0x80, dk_cxlflash_attach) #define DK_CXLFLASH_USER_DIRECT CXL_IOWR(0x81, dk_cxlflash_udirect) #define DK_CXLFLASH_RELEASE CXL_IOWR(0x82, dk_cxlflash_release) #define DK_CXLFLASH_DETACH CXL_IOWR(0x83, dk_cxlflash_detach) #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 */