diff options
| author | Bjorn Andersson <bjorn.andersson@linaro.org> | 2017-01-11 06:35:10 -0800 |
|---|---|---|
| committer | Bjorn Andersson <bjorn.andersson@linaro.org> | 2017-01-18 10:43:15 -0800 |
| commit | 84d58132d285b2edef951d6633c1e5224e8b5283 (patch) | |
| tree | f3894b00cce8e1c351ac1636cc756562e80991fc /drivers/rpmsg | |
| parent | 5e53c42c33bbde53a2650c6aa7201ec63bbfdc49 (diff) | |
| download | linux-84d58132d285b2edef951d6633c1e5224e8b5283.tar.bz2 | |
rpmsg: Introduce "poll" to endpoint ops
This allows rpmsg backends to implement polling of the outgoing buffer,
which provides poll support to user space when using the rpmsg character
device.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Diffstat (limited to 'drivers/rpmsg')
| -rw-r--r-- | drivers/rpmsg/rpmsg_core.c | 20 | ||||
| -rw-r--r-- | drivers/rpmsg/rpmsg_internal.h | 3 |
2 files changed, 23 insertions, 0 deletions
diff --git a/drivers/rpmsg/rpmsg_core.c b/drivers/rpmsg/rpmsg_core.c index 1cfb775e8e82..3bf1418683b1 100644 --- a/drivers/rpmsg/rpmsg_core.c +++ b/drivers/rpmsg/rpmsg_core.c @@ -240,6 +240,26 @@ int rpmsg_trysendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dst) EXPORT_SYMBOL(rpmsg_trysendto); /** + * rpmsg_poll() - poll the endpoint's send buffers + * @ept: the rpmsg endpoint + * @filp: file for poll_wait() + * @wait: poll_table for poll_wait() + * + * Returns mask representing the current state of the endpoint's send buffers + */ +unsigned int rpmsg_poll(struct rpmsg_endpoint *ept, struct file *filp, + poll_table *wait) +{ + if (WARN_ON(!ept)) + return 0; + if (!ept->ops->poll) + return 0; + + return ept->ops->poll(ept, filp, wait); +} +EXPORT_SYMBOL(rpmsg_poll); + +/** * rpmsg_send_offchannel() - send a message using explicit src/dst addresses * @ept: the rpmsg endpoint * @src: source address diff --git a/drivers/rpmsg/rpmsg_internal.h b/drivers/rpmsg/rpmsg_internal.h index 8075a20f919b..6176f2457b6b 100644 --- a/drivers/rpmsg/rpmsg_internal.h +++ b/drivers/rpmsg/rpmsg_internal.h @@ -21,6 +21,7 @@ #define __RPMSG_INTERNAL_H__ #include <linux/rpmsg.h> +#include <linux/poll.h> #define to_rpmsg_device(d) container_of(d, struct rpmsg_device, dev) #define to_rpmsg_driver(d) container_of(d, struct rpmsg_driver, drv) @@ -70,6 +71,8 @@ struct rpmsg_endpoint_ops { int (*trysendto)(struct rpmsg_endpoint *ept, void *data, int len, u32 dst); int (*trysend_offchannel)(struct rpmsg_endpoint *ept, u32 src, u32 dst, void *data, int len); + unsigned int (*poll)(struct rpmsg_endpoint *ept, struct file *filp, + poll_table *wait); }; int rpmsg_register_device(struct rpmsg_device *rpdev); |