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- /* 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 */
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