diff options
Diffstat (limited to 'kernel/include/uapi/scsi/cxlflash_ioctl.h')
| -rw-r--r-- | kernel/include/uapi/scsi/cxlflash_ioctl.h | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/kernel/include/uapi/scsi/cxlflash_ioctl.h b/kernel/include/uapi/scsi/cxlflash_ioctl.h new file mode 100644 index 000000000..831351b2e --- /dev/null +++ b/kernel/include/uapi/scsi/cxlflash_ioctl.h @@ -0,0 +1,174 @@ +/* + * 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 */ +}; + +/* + * 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 */ |