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