/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ /* * Copyright (c) 2024-2025 Intel Corporation * * These are definitions for the mailbox command interface of CXL subsystem. */ #ifndef _UAPI_FWCTL_CXL_H_ #define _UAPI_FWCTL_CXL_H_ #include <linux/types.h> #include <linux/stddef.h> #include <cxl/features.h> /** * struct fwctl_rpc_cxl - ioctl(FWCTL_RPC) input for CXL * @opcode: CXL mailbox command opcode * @flags: Flags for the command (input). * @op_size: Size of input payload. * @reserved1: Reserved. Must be 0s. * @get_sup_feats_in: Get Supported Features input * @get_feat_in: Get Feature input * @set_feat_in: Set Feature input */ struct fwctl_rpc_cxl { __struct_group(fwctl_rpc_cxl_hdr, hdr, /* no attrs */, __u32 opcode; __u32 flags; __u32 op_size; __u32 reserved1; ); union { struct cxl_mbox_get_sup_feats_in get_sup_feats_in; struct cxl_mbox_get_feat_in get_feat_in; struct cxl_mbox_set_feat_in set_feat_in; }; }; /** * struct fwctl_rpc_cxl_out - ioctl(FWCTL_RPC) output for CXL * @size: Size of the output payload * @retval: Return value from device * @get_sup_feats_out: Get Supported Features output * @payload: raw byte stream of payload */ struct fwctl_rpc_cxl_out { __struct_group(fwctl_rpc_cxl_out_hdr, hdr, /* no attrs */, __u32 size; __u32 retval; ); union { struct cxl_mbox_get_sup_feats_out get_sup_feats_out; __DECLARE_FLEX_ARRAY(__u8, payload); }; }; #endif