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TOMOYO Linux Cross Reference
Linux/include/uapi/linux/fsi.h

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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 */
 59 

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