/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ #ifndef _LINUX_FSI_H #define _LINUX_FSI_H #include <linux/types.h> #include <linux/ioctl.h> /* * /dev/scom "raw" ioctl interface * * The driver supports a high level "read/write" interface which * handles retries and converts the status to Linux error codes, * however low level tools an debugger need to access the "raw" * HW status information and interpret it themselves, so this * ioctl interface is also provided for their use case. */ /* Structure for SCOM read/write */ struct scom_access { __u64 addr; /* SCOM address, supports indirect */ __u64 data; /* SCOM data (in for write, out for read) */ __u64 mask; /* Data mask for writes */ __u32 intf_errors; /* Interface error flags */ #define SCOM_INTF_ERR_PARITY 0x00000001 /* Parity error */ #define SCOM_INTF_ERR_PROTECTION 0x00000002 /* Blocked by secure boot */ #define SCOM_INTF_ERR_ABORT 0x00000004 /* PIB reset during access */ #define SCOM_INTF_ERR_UNKNOWN 0x80000000 /* Unknown error */ /* * Note: Any other bit set in intf_errors need to be considered as an * error. Future implementations may define new error conditions. The * pib_status below is only valid if intf_errors is 0. */ __u8 pib_status; /* 3-bit PIB status */ #define SCOM_PIB_SUCCESS 0 /* Access successful */ #define SCOM_PIB_BLOCKED 1 /* PIB blocked, pls retry */ #define SCOM_PIB_OFFLINE 2 /* Chiplet offline */ #define SCOM_PIB_PARTIAL 3 /* Partial good */ #define SCOM_PIB_BAD_ADDR 4 /* Invalid address */ #define SCOM_PIB_CLK_ERR 5 /* Clock error */ #define SCOM_PIB_PARITY_ERR 6 /* Parity error on the PIB bus */ #define SCOM_PIB_TIMEOUT 7 /* Bus timeout */ __u8 pad; }; /* Flags for SCOM check */ #define SCOM_CHECK_SUPPORTED 0x00000001 /* Interface supported */ #define SCOM_CHECK_PROTECTED 0x00000002 /* Interface blocked by secure boot */ /* Flags for SCOM reset */ #define SCOM_RESET_INTF 0x00000001 /* Reset interface */ #define SCOM_RESET_PIB 0x00000002 /* Reset PIB */ #define FSI_SCOM_CHECK _IOR('s', 0x00, __u32) #define FSI_SCOM_READ _IOWR('s', 0x01, struct scom_access) #define FSI_SCOM_WRITE _IOWR('s', 0x02, struct scom_access) #define FSI_SCOM_RESET _IOW('s', 0x03, __u32) #endif /* _LINUX_FSI_H */