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/* 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 */
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