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doc: rmpsg: Update with rpmsg_endpoint

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It seems the documentation was not updated when `rpmsg_sendto`
and related switched from `rpmsg_channel` to `rpmsg_endpoint`.
This change updates the proper calls, text, and the sample.

Signed-off-by: Adrien Leravat <adrien.leravat@gmail.com>
Link: https://lore.kernel.org/r/20231203200606.255302-1-adrien.leravat@gmail.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
This commit is contained in:
Adrien Leravat 2023-12-03 12:06:04 -08:00 committed by Mathieu Poirier
parent 98b1cc82c4
commit 75d6872907
1 changed files with 27 additions and 23 deletions
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50
Documentation/staging/rpmsg.rst
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@ -68,13 +68,14 @@ User API
::
int rpmsg_send(struct rpmsg_channel *rpdev, void *data, int len);
int rpmsg_send(struct rpmsg_endpoint *ept, void *data, int len);
sends a message across to the remote processor on a given channel.
The caller should specify the channel, the data it wants to send,
sends a message across to the remote processor from the given endpoint.
The caller should specify the endpoint, the data it wants to send,
and its length (in bytes). The message will be sent on the specified
channel, i.e. its source and destination address fields will be
set to the channel's src and dst addresses.
endpoint's channel, i.e. its source and destination address fields will be
respectively set to the endpoint's src address and its parent channel
dst addresses.
In case there are no TX buffers available, the function will block until
one becomes available (i.e. until the remote processor consumes
@ -87,17 +88,18 @@ Returns 0 on success and an appropriate error value on failure.
::
int rpmsg_sendto(struct rpmsg_channel *rpdev, void *data, int len, u32 dst);
int rpmsg_sendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dst);
sends a message across to the remote processor on a given channel,
sends a message across to the remote processor from a given endpoint,
to a destination address provided by the caller.
The caller should specify the channel, the data it wants to send,
The caller should specify the endpoint, the data it wants to send,
its length (in bytes), and an explicit destination address.
The message will then be sent to the remote processor to which the
channel belongs, using the channel's src address, and the user-provided
dst address (thus the channel's dst address will be ignored).
endpoints's channel belongs, using the endpoints's src address,
and the user-provided dst address (thus the channel's dst address
will be ignored).
In case there are no TX buffers available, the function will block until
one becomes available (i.e. until the remote processor consumes
@ -110,18 +112,19 @@ Returns 0 on success and an appropriate error value on failure.
::
int rpmsg_send_offchannel(struct rpmsg_channel *rpdev, u32 src, u32 dst,
int rpmsg_send_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst,
void *data, int len);
sends a message across to the remote processor, using the src and dst
addresses provided by the user.
The caller should specify the channel, the data it wants to send,
The caller should specify the endpoint, the data it wants to send,
its length (in bytes), and explicit source and destination addresses.
The message will then be sent to the remote processor to which the
channel belongs, but the channel's src and dst addresses will be
ignored (and the user-provided addresses will be used instead).
endpoint's channel belongs, but the endpoint's src and channel dst
addresses will be ignored (and the user-provided addresses will
be used instead).
In case there are no TX buffers available, the function will block until
one becomes available (i.e. until the remote processor consumes
@ -134,13 +137,14 @@ Returns 0 on success and an appropriate error value on failure.
::
int rpmsg_trysend(struct rpmsg_channel *rpdev, void *data, int len);
int rpmsg_trysend(struct rpmsg_endpoint *ept, void *data, int len);
sends a message across to the remote processor on a given channel.
The caller should specify the channel, the data it wants to send,
sends a message across to the remote processor from a given endpoint.
The caller should specify the endpoint, the data it wants to send,
and its length (in bytes). The message will be sent on the specified
channel, i.e. its source and destination address fields will be
set to the channel's src and dst addresses.
endpoint's channel, i.e. its source and destination address fields will be
respectively set to the endpoint's src address and its parent channel
dst addresses.
In case there are no TX buffers available, the function will immediately
return -ENOMEM without waiting until one becomes available.
@ -150,10 +154,10 @@ Returns 0 on success and an appropriate error value on failure.
::
int rpmsg_trysendto(struct rpmsg_channel *rpdev, void *data, int len, u32 dst)
int rpmsg_trysendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dst)
sends a message across to the remote processor on a given channel,
sends a message across to the remote processor from a given endoint,
to a destination address provided by the user.
The user should specify the channel, the data it wants to send,
@ -171,7 +175,7 @@ Returns 0 on success and an appropriate error value on failure.
::
int rpmsg_trysend_offchannel(struct rpmsg_channel *rpdev, u32 src, u32 dst,
int rpmsg_trysend_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst,
void *data, int len);
@ -284,7 +288,7 @@ content to the console.
dev_info(&rpdev->dev, "chnl: 0x%x -> 0x%x\n", rpdev->src, rpdev->dst);
/* send a message on our channel */
err = rpmsg_send(rpdev, "hello!", 6);
err = rpmsg_send(rpdev->ept, "hello!", 6);
if (err) {
pr_err("rpmsg_send failed: %d\n", err);
return err;