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