99 lines
2.2 KiB
C
99 lines
2.2 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* IMPORTANT: The following constants must match the ones used and defined in
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* external/qemu/include/hw/misc/goldfish_pipe.h
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*/
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#ifndef GOLDFISH_PIPE_QEMU_H
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#define GOLDFISH_PIPE_QEMU_H
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/* List of bitflags returned in status of CMD_POLL command */
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enum PipePollFlags {
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PIPE_POLL_IN = 1 << 0,
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PIPE_POLL_OUT = 1 << 1,
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PIPE_POLL_HUP = 1 << 2
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};
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/* Possible status values used to signal errors */
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enum PipeErrors {
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PIPE_ERROR_INVAL = -1,
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PIPE_ERROR_AGAIN = -2,
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PIPE_ERROR_NOMEM = -3,
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PIPE_ERROR_IO = -4
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};
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/* Bit-flags used to signal events from the emulator */
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enum PipeWakeFlags {
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/* emulator closed pipe */
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PIPE_WAKE_CLOSED = 1 << 0,
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/* pipe can now be read from */
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PIPE_WAKE_READ = 1 << 1,
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/* pipe can now be written to */
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PIPE_WAKE_WRITE = 1 << 2,
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/* unlock this pipe's DMA buffer */
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PIPE_WAKE_UNLOCK_DMA = 1 << 3,
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/* unlock DMA buffer of the pipe shared to this pipe */
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PIPE_WAKE_UNLOCK_DMA_SHARED = 1 << 4,
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};
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/* Possible pipe closing reasons */
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enum PipeCloseReason {
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/* guest sent a close command */
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PIPE_CLOSE_GRACEFUL = 0,
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/* guest rebooted, we're closing the pipes */
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PIPE_CLOSE_REBOOT = 1,
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/* close old pipes on snapshot load */
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PIPE_CLOSE_LOAD_SNAPSHOT = 2,
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/* some unrecoverable error on the pipe */
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PIPE_CLOSE_ERROR = 3,
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};
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/* Bit flags for the 'flags' field */
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enum PipeFlagsBits {
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BIT_CLOSED_ON_HOST = 0, /* pipe closed by host */
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BIT_WAKE_ON_WRITE = 1, /* want to be woken on writes */
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BIT_WAKE_ON_READ = 2, /* want to be woken on reads */
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};
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enum PipeRegs {
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PIPE_REG_CMD = 0,
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PIPE_REG_SIGNAL_BUFFER_HIGH = 4,
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PIPE_REG_SIGNAL_BUFFER = 8,
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PIPE_REG_SIGNAL_BUFFER_COUNT = 12,
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PIPE_REG_OPEN_BUFFER_HIGH = 20,
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PIPE_REG_OPEN_BUFFER = 24,
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PIPE_REG_VERSION = 36,
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PIPE_REG_GET_SIGNALLED = 48,
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};
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enum PipeCmdCode {
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/* to be used by the pipe device itself */
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PIPE_CMD_OPEN = 1,
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PIPE_CMD_CLOSE,
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PIPE_CMD_POLL,
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PIPE_CMD_WRITE,
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PIPE_CMD_WAKE_ON_WRITE,
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PIPE_CMD_READ,
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PIPE_CMD_WAKE_ON_READ,
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/*
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* TODO(zyy): implement a deferred read/write execution to allow
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* parallel processing of pipe operations on the host.
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*/
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PIPE_CMD_WAKE_ON_DONE_IO,
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};
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#endif /* GOLDFISH_PIPE_QEMU_H */
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