include/uapi/linux/genwqe/genwqe_card.h

Source file repositories/reference/linux-study-clean/include/uapi/linux/genwqe/genwqe_card.h

File Facts

System
Linux kernel
Corpus path
include/uapi/linux/genwqe/genwqe_card.h
Extension
.h
Size
17802 bytes
Lines
503
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

struct genwqe_reg_io {
	__u64 num;		/* register offset/address */
	__u64 val64;
};

/*
 * All registers of our card will return values not equal this values.
 * If we see IO_ILLEGAL_VALUE on any of our MMIO register reads, the
 * card can be considered as unusable. It will need recovery.
 */
#define IO_ILLEGAL_VALUE		0xffffffffffffffffull

/*
 * Generic DDCB execution interface.
 *
 * This interface is a first prototype resulting from discussions we
 * had with other teams which wanted to use the Genwqe card. It allows
 * to issue a DDCB request in a generic way. The request will block
 * until it finishes or time out with error.
 *
 * Some DDCBs require DMA addresses to be specified in the ASIV
 * block. The interface provies the capability to let the kernel
 * driver know where those addresses are by specifying the ATS field,
 * such that it can replace the user-space addresses with appropriate
 * DMA addresses or DMA addresses of a scatter gather list which is
 * dynamically created.
 *
 * Our hardware will refuse DDCB execution if the ATS field is not as
 * expected. That means the DDCB execution engine in the chip knows
 * where it expects DMA addresses within the ASIV part of the DDCB and
 * will check that against the ATS field definition. Any invalid or
 * unknown ATS content will lead to DDCB refusal.
 */

/* Genwqe chip Units */
#define DDCB_ACFUNC_SLU			0x00  /* chip service layer unit */
#define DDCB_ACFUNC_APP			0x01  /* chip application */

/* DDCB return codes (RETC) */
#define DDCB_RETC_IDLE			0x0000 /* Unexecuted/DDCB created */
#define DDCB_RETC_PENDING		0x0101 /* Pending Execution */
#define DDCB_RETC_COMPLETE		0x0102 /* Cmd complete. No error */
#define DDCB_RETC_FAULT			0x0104 /* App Err, recoverable */
#define DDCB_RETC_ERROR			0x0108 /* App Err, non-recoverable */
#define DDCB_RETC_FORCED_ERROR		0x01ff /* overwritten by driver  */

#define DDCB_RETC_UNEXEC		0x0110 /* Unexe/Removed from queue */
#define DDCB_RETC_TERM			0x0120 /* Terminated */
#define DDCB_RETC_RES0			0x0140 /* Reserved */
#define DDCB_RETC_RES1			0x0180 /* Reserved */

/* DDCB Command Options (CMDOPT) */
#define DDCB_OPT_ECHO_FORCE_NO		0x0000 /* ECHO DDCB */
#define DDCB_OPT_ECHO_FORCE_102		0x0001 /* force return code */
#define DDCB_OPT_ECHO_FORCE_104		0x0002
#define DDCB_OPT_ECHO_FORCE_108		0x0003

#define DDCB_OPT_ECHO_FORCE_110		0x0004 /* only on PF ! */
#define DDCB_OPT_ECHO_FORCE_120		0x0005
#define DDCB_OPT_ECHO_FORCE_140		0x0006
#define DDCB_OPT_ECHO_FORCE_180		0x0007

#define DDCB_OPT_ECHO_COPY_NONE		(0 << 5)
#define DDCB_OPT_ECHO_COPY_ALL		(1 << 5)

/* Definitions of Service Layer Commands */
#define SLCMD_ECHO_SYNC			0x00 /* PF/VF */
#define SLCMD_MOVE_FLASH		0x06 /* PF only */
#define SLCMD_MOVE_FLASH_FLAGS_MODE	0x03 /* bit 0 and 1 used for mode */
#define SLCMD_MOVE_FLASH_FLAGS_DLOAD	0	/* mode: download  */
#define SLCMD_MOVE_FLASH_FLAGS_EMUL	1	/* mode: emulation */
#define SLCMD_MOVE_FLASH_FLAGS_UPLOAD	2	/* mode: upload	   */
#define SLCMD_MOVE_FLASH_FLAGS_VERIFY	3	/* mode: verify	   */
#define SLCMD_MOVE_FLASH_FLAG_NOTAP	(1 << 2)/* just dump DDCB and exit */
#define SLCMD_MOVE_FLASH_FLAG_POLL	(1 << 3)/* wait for RETC >= 0102   */
#define SLCMD_MOVE_FLASH_FLAG_PARTITION	(1 << 4)
#define SLCMD_MOVE_FLASH_FLAG_ERASE	(1 << 5)

enum genwqe_card_state {
	GENWQE_CARD_UNUSED = 0,
	GENWQE_CARD_USED = 1,
	GENWQE_CARD_FATAL_ERROR = 2,
	GENWQE_CARD_RELOAD_BITSTREAM = 3,
	GENWQE_CARD_STATE_MAX,
};

/* common struct for chip image exchange */
struct genwqe_bitstream {
	__u64 data_addr;		/* pointer to image data */
	__u32 size;			/* size of image file */

Annotation

Implementation Notes