1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Copyright 2017 IBM Corp. 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * This program is free software; you can redistribute it and/or 6*4882a593Smuzhiyun * modify it under the terms of the GNU General Public License 7*4882a593Smuzhiyun * as published by the Free Software Foundation; either version 8*4882a593Smuzhiyun * 2 of the License, or (at your option) any later version. 9*4882a593Smuzhiyun */ 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun #ifndef _UAPI_LINUX_ASPEED_LPC_CTRL_H 12*4882a593Smuzhiyun #define _UAPI_LINUX_ASPEED_LPC_CTRL_H 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun #include <linux/ioctl.h> 15*4882a593Smuzhiyun #include <linux/types.h> 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun /* Window types */ 18*4882a593Smuzhiyun #define ASPEED_LPC_CTRL_WINDOW_FLASH 1 19*4882a593Smuzhiyun #define ASPEED_LPC_CTRL_WINDOW_MEMORY 2 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun /* 22*4882a593Smuzhiyun * This driver provides a window for the host to access a BMC resource 23*4882a593Smuzhiyun * across the BMC <-> Host LPC bus. 24*4882a593Smuzhiyun * 25*4882a593Smuzhiyun * window_type: The BMC resource that the host will access through the 26*4882a593Smuzhiyun * window. BMC flash and BMC RAM. 27*4882a593Smuzhiyun * 28*4882a593Smuzhiyun * window_id: For each window type there may be multiple windows, 29*4882a593Smuzhiyun * these are referenced by ID. 30*4882a593Smuzhiyun * 31*4882a593Smuzhiyun * flags: Reserved for future use, this field is expected to be 32*4882a593Smuzhiyun * zeroed. 33*4882a593Smuzhiyun * 34*4882a593Smuzhiyun * addr: Address on the host LPC bus that the specified window should 35*4882a593Smuzhiyun * be mapped. This address must be power of two aligned. 36*4882a593Smuzhiyun * 37*4882a593Smuzhiyun * offset: Offset into the BMC window that should be mapped to the 38*4882a593Smuzhiyun * host (at addr). This must be a multiple of size. 39*4882a593Smuzhiyun * 40*4882a593Smuzhiyun * size: The size of the mapping. The smallest possible size is 64K. 41*4882a593Smuzhiyun * This must be power of two aligned. 42*4882a593Smuzhiyun * 43*4882a593Smuzhiyun */ 44*4882a593Smuzhiyun 45*4882a593Smuzhiyun struct aspeed_lpc_ctrl_mapping { 46*4882a593Smuzhiyun __u8 window_type; 47*4882a593Smuzhiyun __u8 window_id; 48*4882a593Smuzhiyun __u16 flags; 49*4882a593Smuzhiyun __u32 addr; 50*4882a593Smuzhiyun __u32 offset; 51*4882a593Smuzhiyun __u32 size; 52*4882a593Smuzhiyun }; 53*4882a593Smuzhiyun 54*4882a593Smuzhiyun #define __ASPEED_LPC_CTRL_IOCTL_MAGIC 0xb2 55*4882a593Smuzhiyun 56*4882a593Smuzhiyun #define ASPEED_LPC_CTRL_IOCTL_GET_SIZE _IOWR(__ASPEED_LPC_CTRL_IOCTL_MAGIC, \ 57*4882a593Smuzhiyun 0x00, struct aspeed_lpc_ctrl_mapping) 58*4882a593Smuzhiyun 59*4882a593Smuzhiyun #define ASPEED_LPC_CTRL_IOCTL_MAP _IOW(__ASPEED_LPC_CTRL_IOCTL_MAGIC, \ 60*4882a593Smuzhiyun 0x01, struct aspeed_lpc_ctrl_mapping) 61*4882a593Smuzhiyun 62*4882a593Smuzhiyun #endif /* _UAPI_LINUX_ASPEED_LPC_CTRL_H */ 63