From 40eaa8c0cbba4a27668c7e01373ccd5b38381e2f Mon Sep 17 00:00:00 2001 From: Hector Martin Date: Mon, 23 Jan 2023 15:53:54 +0900 Subject: soc: apple: rtkit: Add apple_rtkit_idle() function This is yet another low power mode, used by DCP. Reviewed-by: Eric Curtin Reviewed-by: Sven Peter Signed-off-by: Hector Martin --- include/linux/soc/apple/rtkit.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/linux/soc') diff --git a/include/linux/soc/apple/rtkit.h b/include/linux/soc/apple/rtkit.h index c9cabb679cd1..a2446b45ed7f 100644 --- a/include/linux/soc/apple/rtkit.h +++ b/include/linux/soc/apple/rtkit.h @@ -104,6 +104,11 @@ int apple_rtkit_wake(struct apple_rtkit *rtk); */ int apple_rtkit_shutdown(struct apple_rtkit *rtk); +/* + * Put the co-processor into idle mode + */ +int apple_rtkit_idle(struct apple_rtkit *rtk); + /* * Checks if RTKit is running and ready to handle messages. */ -- cgit v1.2.3 From 4435d63f172851b57a6a0943b73a6b8055a9356f Mon Sep 17 00:00:00 2001 From: Asahi Lina Date: Sat, 21 Jan 2023 16:42:53 +0900 Subject: soc: apple: rtkit: Add a private pointer to apple_rtkit_shmem This allows downstream consumers to keep track of private data for shmem mappings. In particular, the Rust abstraction will use this to safely drop data associated with a mapping when it is unmapped. Signed-off-by: Asahi Lina Reviewed-by: Sven Peter Reviewed-by: Eric Curtin Signed-off-by: Hector Martin --- include/linux/soc/apple/rtkit.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux/soc') diff --git a/include/linux/soc/apple/rtkit.h b/include/linux/soc/apple/rtkit.h index a2446b45ed7f..927b214ef1c6 100644 --- a/include/linux/soc/apple/rtkit.h +++ b/include/linux/soc/apple/rtkit.h @@ -22,6 +22,7 @@ * @size: Size of the shared memory buffer. * @iova: Device VA of shared memory buffer. * @is_mapped: Shared memory buffer is managed by the co-processor. + * @private: Private data pointer for the parent driver. */ struct apple_rtkit_shmem { @@ -30,6 +31,7 @@ struct apple_rtkit_shmem { size_t size; dma_addr_t iova; bool is_mapped; + void *private; }; /* -- cgit v1.2.3 From b3892860f50920ea46342d32bf51323877365082 Mon Sep 17 00:00:00 2001 From: Asahi Lina Date: Sat, 21 Jan 2023 16:41:35 +0900 Subject: soc: apple: rtkit: Export non-devm init/free functions While we normally encourage devm usage by drivers, some consumers (and in particular the upcoming Rust abstractions) might want to manually manage memory. Export the raw functions to make this possible. Signed-off-by: Asahi Lina Reviewed-by: Sven Peter Reviewed-by: Eric Curtin Signed-off-by: Hector Martin --- drivers/soc/apple/rtkit.c | 15 ++++++++++----- include/linux/soc/apple/rtkit.h | 19 +++++++++++++++++++ 2 files changed, 29 insertions(+), 5 deletions(-) (limited to 'include/linux/soc') diff --git a/drivers/soc/apple/rtkit.c b/drivers/soc/apple/rtkit.c index efb1fa77dff2..35ec35aa500d 100644 --- a/drivers/soc/apple/rtkit.c +++ b/drivers/soc/apple/rtkit.c @@ -699,7 +699,7 @@ static int apple_rtkit_request_mbox_chan(struct apple_rtkit *rtk) return 0; } -static struct apple_rtkit *apple_rtkit_init(struct device *dev, void *cookie, +struct apple_rtkit *apple_rtkit_init(struct device *dev, void *cookie, const char *mbox_name, int mbox_idx, const struct apple_rtkit_ops *ops) { @@ -751,6 +751,7 @@ free_rtk: kfree(rtk); return ERR_PTR(ret); } +EXPORT_SYMBOL_GPL(apple_rtkit_init); static int apple_rtkit_wait_for_completion(struct completion *c) { @@ -947,10 +948,8 @@ int apple_rtkit_wake(struct apple_rtkit *rtk) } EXPORT_SYMBOL_GPL(apple_rtkit_wake); -static void apple_rtkit_free(void *data) +void apple_rtkit_free(struct apple_rtkit *rtk) { - struct apple_rtkit *rtk = data; - mbox_free_channel(rtk->mbox_chan); destroy_workqueue(rtk->wq); @@ -961,6 +960,12 @@ static void apple_rtkit_free(void *data) kfree(rtk->syslog_msg_buffer); kfree(rtk); } +EXPORT_SYMBOL_GPL(apple_rtkit_free); + +static void apple_rtkit_free_wrapper(void *data) +{ + apple_rtkit_free(data); +} struct apple_rtkit *devm_apple_rtkit_init(struct device *dev, void *cookie, const char *mbox_name, int mbox_idx, @@ -973,7 +978,7 @@ struct apple_rtkit *devm_apple_rtkit_init(struct device *dev, void *cookie, if (IS_ERR(rtk)) return rtk; - ret = devm_add_action_or_reset(dev, apple_rtkit_free, rtk); + ret = devm_add_action_or_reset(dev, apple_rtkit_free_wrapper, rtk); if (ret) return ERR_PTR(ret); diff --git a/include/linux/soc/apple/rtkit.h b/include/linux/soc/apple/rtkit.h index 927b214ef1c6..fc456f75c131 100644 --- a/include/linux/soc/apple/rtkit.h +++ b/include/linux/soc/apple/rtkit.h @@ -79,6 +79,25 @@ struct apple_rtkit *devm_apple_rtkit_init(struct device *dev, void *cookie, const char *mbox_name, int mbox_idx, const struct apple_rtkit_ops *ops); +/* + * Non-devm version of devm_apple_rtkit_init. Must be freed with + * apple_rtkit_free. + * + * @dev: Pointer to the device node this coprocessor is assocated with + * @cookie: opaque cookie passed to all functions defined in rtkit_ops + * @mbox_name: mailbox name used to communicate with the co-processor + * @mbox_idx: mailbox index to be used if mbox_name is NULL + * @ops: pointer to rtkit_ops to be used for this co-processor + */ +struct apple_rtkit *apple_rtkit_init(struct device *dev, void *cookie, + const char *mbox_name, int mbox_idx, + const struct apple_rtkit_ops *ops); + +/* + * Free an instance of apple_rtkit. + */ +void apple_rtkit_free(struct apple_rtkit *rtk); + /* * Reinitialize internal structures. Must only be called with the co-processor * is held in reset. -- cgit v1.2.3