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1 | /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ |
2 | #ifndef _UAPI_LINUX_FSI_H | |
3 | #define _UAPI_LINUX_FSI_H | |
4 | ||
5 | #include <linux/types.h> | |
6 | #include <linux/ioctl.h> | |
7 | ||
8 | /* | |
9 | * /dev/scom "raw" ioctl interface | |
10 | * | |
11 | * The driver supports a high level "read/write" interface which | |
12 | * handles retries and converts the status to Linux error codes, | |
13 | * however low level tools an debugger need to access the "raw" | |
14 | * HW status information and interpret it themselves, so this | |
15 | * ioctl interface is also provided for their use case. | |
16 | */ | |
17 | ||
18 | /* Structure for SCOM read/write */ | |
19 | struct scom_access { | |
20 | __u64 addr; /* SCOM address, supports indirect */ | |
21 | __u64 data; /* SCOM data (in for write, out for read) */ | |
22 | __u64 mask; /* Data mask for writes */ | |
23 | __u32 intf_errors; /* Interface error flags */ | |
24 | #define SCOM_INTF_ERR_PARITY 0x00000001 /* Parity error */ | |
25 | #define SCOM_INTF_ERR_PROTECTION 0x00000002 /* Blocked by secure boot */ | |
26 | #define SCOM_INTF_ERR_ABORT 0x00000004 /* PIB reset during access */ | |
27 | #define SCOM_INTF_ERR_UNKNOWN 0x80000000 /* Unknown error */ | |
28 | /* | |
29 | * Note: Any other bit set in intf_errors need to be considered as an | |
30 | * error. Future implementations may define new error conditions. The | |
31 | * pib_status below is only valid if intf_errors is 0. | |
32 | */ | |
33 | __u8 pib_status; /* 3-bit PIB status */ | |
34 | #define SCOM_PIB_SUCCESS 0 /* Access successful */ | |
35 | #define SCOM_PIB_BLOCKED 1 /* PIB blocked, pls retry */ | |
36 | #define SCOM_PIB_OFFLINE 2 /* Chiplet offline */ | |
37 | #define SCOM_PIB_PARTIAL 3 /* Partial good */ | |
38 | #define SCOM_PIB_BAD_ADDR 4 /* Invalid address */ | |
39 | #define SCOM_PIB_CLK_ERR 5 /* Clock error */ | |
40 | #define SCOM_PIB_PARITY_ERR 6 /* Parity error on the PIB bus */ | |
41 | #define SCOM_PIB_TIMEOUT 7 /* Bus timeout */ | |
42 | __u8 pad; | |
43 | }; | |
44 | ||
45 | /* Flags for SCOM check */ | |
46 | #define SCOM_CHECK_SUPPORTED 0x00000001 /* Interface supported */ | |
47 | #define SCOM_CHECK_PROTECTED 0x00000002 /* Interface blocked by secure boot */ | |
48 | ||
49 | /* Flags for SCOM reset */ | |
50 | #define SCOM_RESET_INTF 0x00000001 /* Reset interface */ | |
51 | #define SCOM_RESET_PIB 0x00000002 /* Reset PIB */ | |
52 | ||
53 | #define FSI_SCOM_CHECK _IOR('s', 0x00, __u32) | |
54 | #define FSI_SCOM_READ _IOWR('s', 0x01, struct scom_access) | |
55 | #define FSI_SCOM_WRITE _IOWR('s', 0x02, struct scom_access) | |
56 | #define FSI_SCOM_RESET _IOW('s', 0x03, __u32) | |
57 | ||
58 | #endif /* _UAPI_LINUX_FSI_H */ |