mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-25 08:47:24 +07:00
9b9a4a3f14
The boilerplate license is not necessary when the SPDX line is present. Signed-off-by: Roman Kiryanov <rkir@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
99 lines
2.2 KiB
C
99 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* IMPORTANT: The following constants must match the ones used and defined in
|
|
* external/qemu/include/hw/misc/goldfish_pipe.h
|
|
*/
|
|
|
|
#ifndef GOLDFISH_PIPE_QEMU_H
|
|
#define GOLDFISH_PIPE_QEMU_H
|
|
|
|
/* List of bitflags returned in status of CMD_POLL command */
|
|
enum PipePollFlags {
|
|
PIPE_POLL_IN = 1 << 0,
|
|
PIPE_POLL_OUT = 1 << 1,
|
|
PIPE_POLL_HUP = 1 << 2
|
|
};
|
|
|
|
/* Possible status values used to signal errors */
|
|
enum PipeErrors {
|
|
PIPE_ERROR_INVAL = -1,
|
|
PIPE_ERROR_AGAIN = -2,
|
|
PIPE_ERROR_NOMEM = -3,
|
|
PIPE_ERROR_IO = -4
|
|
};
|
|
|
|
/* Bit-flags used to signal events from the emulator */
|
|
enum PipeWakeFlags {
|
|
/* emulator closed pipe */
|
|
PIPE_WAKE_CLOSED = 1 << 0,
|
|
|
|
/* pipe can now be read from */
|
|
PIPE_WAKE_READ = 1 << 1,
|
|
|
|
/* pipe can now be written to */
|
|
PIPE_WAKE_WRITE = 1 << 2,
|
|
|
|
/* unlock this pipe's DMA buffer */
|
|
PIPE_WAKE_UNLOCK_DMA = 1 << 3,
|
|
|
|
/* unlock DMA buffer of the pipe shared to this pipe */
|
|
PIPE_WAKE_UNLOCK_DMA_SHARED = 1 << 4,
|
|
};
|
|
|
|
/* Possible pipe closing reasons */
|
|
enum PipeCloseReason {
|
|
/* guest sent a close command */
|
|
PIPE_CLOSE_GRACEFUL = 0,
|
|
|
|
/* guest rebooted, we're closing the pipes */
|
|
PIPE_CLOSE_REBOOT = 1,
|
|
|
|
/* close old pipes on snapshot load */
|
|
PIPE_CLOSE_LOAD_SNAPSHOT = 2,
|
|
|
|
/* some unrecoverable error on the pipe */
|
|
PIPE_CLOSE_ERROR = 3,
|
|
};
|
|
|
|
/* Bit flags for the 'flags' field */
|
|
enum PipeFlagsBits {
|
|
BIT_CLOSED_ON_HOST = 0, /* pipe closed by host */
|
|
BIT_WAKE_ON_WRITE = 1, /* want to be woken on writes */
|
|
BIT_WAKE_ON_READ = 2, /* want to be woken on reads */
|
|
};
|
|
|
|
enum PipeRegs {
|
|
PIPE_REG_CMD = 0,
|
|
|
|
PIPE_REG_SIGNAL_BUFFER_HIGH = 4,
|
|
PIPE_REG_SIGNAL_BUFFER = 8,
|
|
PIPE_REG_SIGNAL_BUFFER_COUNT = 12,
|
|
|
|
PIPE_REG_OPEN_BUFFER_HIGH = 20,
|
|
PIPE_REG_OPEN_BUFFER = 24,
|
|
|
|
PIPE_REG_VERSION = 36,
|
|
|
|
PIPE_REG_GET_SIGNALLED = 48,
|
|
};
|
|
|
|
enum PipeCmdCode {
|
|
/* to be used by the pipe device itself */
|
|
PIPE_CMD_OPEN = 1,
|
|
|
|
PIPE_CMD_CLOSE,
|
|
PIPE_CMD_POLL,
|
|
PIPE_CMD_WRITE,
|
|
PIPE_CMD_WAKE_ON_WRITE,
|
|
PIPE_CMD_READ,
|
|
PIPE_CMD_WAKE_ON_READ,
|
|
|
|
/*
|
|
* TODO(zyy): implement a deferred read/write execution to allow
|
|
* parallel processing of pipe operations on the host.
|
|
*/
|
|
PIPE_CMD_WAKE_ON_DONE_IO,
|
|
};
|
|
|
|
#endif /* GOLDFISH_PIPE_QEMU_H */
|