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| author | Hector Martin <marcan@marcan.st> | 2022-09-14 11:34:31 +0300 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2022-09-17 20:53:29 +0300 |
| commit | f5a5e83379b537f6252526bb4d285b771f6f0b89 (patch) | |
| tree | e77a4a4e75c28e77ce5134eaaf6ea78b59165148 | |
| parent | 387969b7ab014ca71582473a4950fa711efe204b (diff) | |
| download | linux-f5a5e83379b537f6252526bb4d285b771f6f0b89.tar.xz | |
soc: apple: rtkit: Add apple_rtkit_poll
This allows a client to receive messages in atomic context, by polling.
Signed-off-by: Hector Martin <marcan@marcan.st>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Sven Peter <sven@svenpeter.dev>
Reviewed-by: Eric Curtin <ecurtin@redhat.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
| -rw-r--r-- | drivers/soc/apple/rtkit.c | 6 | ||||
| -rw-r--r-- | include/linux/soc/apple/rtkit.h | 12 |
2 files changed, 18 insertions, 0 deletions
diff --git a/drivers/soc/apple/rtkit.c b/drivers/soc/apple/rtkit.c index cf1129e9f76b..031ec4aa06d5 100644 --- a/drivers/soc/apple/rtkit.c +++ b/drivers/soc/apple/rtkit.c @@ -660,6 +660,12 @@ int apple_rtkit_send_message_wait(struct apple_rtkit *rtk, u8 ep, u64 message, } EXPORT_SYMBOL_GPL(apple_rtkit_send_message_wait); +int apple_rtkit_poll(struct apple_rtkit *rtk) +{ + return mbox_client_peek_data(rtk->mbox_chan); +} +EXPORT_SYMBOL_GPL(apple_rtkit_poll); + int apple_rtkit_start_ep(struct apple_rtkit *rtk, u8 endpoint) { u64 msg; diff --git a/include/linux/soc/apple/rtkit.h b/include/linux/soc/apple/rtkit.h index 88eb832eac7b..c9cabb679cd1 100644 --- a/include/linux/soc/apple/rtkit.h +++ b/include/linux/soc/apple/rtkit.h @@ -152,4 +152,16 @@ int apple_rtkit_send_message(struct apple_rtkit *rtk, u8 ep, u64 message, int apple_rtkit_send_message_wait(struct apple_rtkit *rtk, u8 ep, u64 message, unsigned long timeout, bool atomic); +/* + * Process incoming messages in atomic context. + * This only guarantees that messages arrive as far as the recv_message_early + * callback; drivers expecting to handle incoming messages synchronously + * by calling this function must do it that way. + * Will return 1 if some data was processed, 0 if none was, or a + * negative error code on failure. + * + * @rtk: RTKit reference + */ +int apple_rtkit_poll(struct apple_rtkit *rtk); + #endif /* _LINUX_APPLE_RTKIT_H_ */ |