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98 lines
2.2 KiB
98 lines
2.2 KiB
/* 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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