0 'ˆÁÄ „ãßÀ¿È'¸'/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ /* * CXL Flash Device Driver * * Written by: Manoj N. Kumar , IBM Corporation * Matthew R. Ochs , 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 /* * Structure and definitions for all CXL Flash ioctls */ #define CXLFLASH_WWID_LEN 16 /* * 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 superpipe 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 #define DK_CXLFLASH_APP_CLOSE_ADAP_FD 0x0000000000000002ULL #define DK_CXLFLASH_CONTEXT_SQ_CMD_MODE 0x0000000000000004ULL /* * General 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. */ /* * DK_CXLFLASH_ATTACH Notes: * ------------------------ * Read/write access permissions are specified via the O_RDONLY, O_WRONLY, * and O_RDWR flags defined in the fcntl.h header file. * * A valid adapter file descriptor (fd >= 0) is only returned on the initial * attach (successful) of a context. When a context is shared(reused), the user * is expected to already 'know' the adapter file descriptor associated with the * context. */ #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]; /*