diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-10-26 09:11:43 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-10-26 09:11:43 -0700 |
commit | 18d0eae30e6a4f8644d589243d7ac1d70d29203d (patch) | |
tree | fef5a78d54b8763cb17867018356cfe311b31036 /drivers/platform/goldfish/goldfish_pipe_qemu.h | |
parent | 26873acacbdbb4e4b444f5dd28dcc4853f0e8ba2 (diff) | |
parent | 14fdc2c5318ae420e68496975f48dc1dbef52649 (diff) |
Merge tag 'char-misc-4.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver updates from Greg KH:
"Here is the big set of char/misc patches for 4.20-rc1.
Loads of things here, we have new code in all of these driver
subsystems:
- fpga
- stm
- extcon
- nvmem
- eeprom
- hyper-v
- gsmi
- coresight
- thunderbolt
- vmw_balloon
- goldfish
- soundwire
along with lots of fixes and minor changes to other small drivers.
All of these have been in linux-next for a while with no reported
issues"
* tag 'char-misc-4.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (245 commits)
Documentation/security-bugs: Clarify treatment of embargoed information
lib: Fix ia64 bootloader linkage
MAINTAINERS: Clarify UIO vs UIOVEC maintainer
docs/uio: fix a grammar nitpick
docs: fpga: document programming fpgas using regions
fpga: add devm_fpga_region_create
fpga: bridge: add devm_fpga_bridge_create
fpga: mgr: add devm_fpga_mgr_create
hv_balloon: Replace spin_is_locked() with lockdep
sgi-xp: Replace spin_is_locked() with lockdep
eeprom: New ee1004 driver for DDR4 memory
eeprom: at25: remove unneeded 'at25_remove'
w1: IAD Register is yet readable trough iad sys file. Fix snprintf (%u for unsigned, count for max size).
misc: mic: scif: remove set but not used variables 'src_dma_addr, dst_dma_addr'
misc: mic: fix a DMA pool free failure
platform: goldfish: pipe: Add a blank line to separate varibles and code
platform: goldfish: pipe: Remove redundant casting
platform: goldfish: pipe: Call misc_deregister if init fails
platform: goldfish: pipe: Move the file-scope goldfish_pipe_dev variable into the driver state
platform: goldfish: pipe: Move the file-scope goldfish_pipe_miscdev variable into the driver state
...
Diffstat (limited to 'drivers/platform/goldfish/goldfish_pipe_qemu.h')
-rw-r--r-- | drivers/platform/goldfish/goldfish_pipe_qemu.h | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/drivers/platform/goldfish/goldfish_pipe_qemu.h b/drivers/platform/goldfish/goldfish_pipe_qemu.h new file mode 100644 index 000000000000..b4d78c108afd --- /dev/null +++ b/drivers/platform/goldfish/goldfish_pipe_qemu.h @@ -0,0 +1,98 @@ +/* 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 */ |