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 #include <linux/types.h> 15 16 /* Window types */ 17 #define ASPEED_LPC_CTRL_WINDOW_FLASH 1 18 #define ASPEED_LPC_CTRL_WINDOW_MEMORY 2 19 20 /* 21 * This driver provides a window for the host to access a BMC resource 22 * across the BMC <-> Host LPC bus. 23 * 24 * window_type: The BMC resource that the host will access through the 25 * window. BMC flash and BMC RAM. 26 * 27 * window_id: For each window type there may be multiple windows, 28 * these are referenced by ID. 29 * 30 * flags: Reserved for future use, this field is expected to be 31 * zeroed. 32 * 33 * addr: Address on the host LPC bus that the specified window should 34 * be mapped. This address must be power of two aligned. 35 * 36 * offset: Offset into the BMC window that should be mapped to the 37 * host (at addr). This must be a multiple of size. 38 * 39 * size: The size of the mapping. The smallest possible size is 64K. 40 * This must be power of two aligned. 41 * 42 */ 43 44 struct aspeed_lpc_ctrl_mapping { 45 __u8 window_type; 46 __u8 window_id; 47 __u16 flags; 48 __u32 addr; 49 __u32 offset; 50 __u32 size; 51 }; 52 53 #define __ASPEED_LPC_CTRL_IOCTL_MAGIC 0xb2 54 55 #define ASPEED_LPC_CTRL_IOCTL_GET_SIZE _IOWR(__ASPEED_LPC_CTRL_IOCTL_MAGIC, \ 56 0x00, struct aspeed_lpc_ctrl_mapping) 57 58 #define ASPEED_LPC_CTRL_IOCTL_MAP _IOW(__ASPEED_LPC_CTRL_IOCTL_MAGIC, \ 59 0x01, struct aspeed_lpc_ctrl_mapping) 60 61 #endif /* _UAPI_LINUX_ASPEED_LPC_CTRL_H */ 62