Eric Lee / smarc-ti-linux-kernel

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Commit 4479855b6aadf3dc7ad69e68ed5e9b7ec1232989

Authored by Suman Anna
1 parent bb928e5074
Exists in smarc-ti-linux-3.14.y and in 1 other branch processor-sdk-linux-01.00.00

samples/rpmsg: add support for multiple instances 

The current rpmsg_client_sample is a very simple example and
is not designed to handle multiple instances. Add support for
multiple instances, so that the same number of pings are sent
to each instance. The instances can be on one or multiple
remote processors.

Signed-off-by: Suman Anna <s-anna@ti.com>

Showing 1 changed file with 16 additions and 3 deletions Side-by-side Diff

samples/rpmsg/rpmsg_client_sample.c
Diff comments   View file @ 4479855
... ... @@ -24,19 +24,24 @@
24 24 #define MSG "hello world!"
25 25 #define MSG_LIMIT 100
26 26  
  27 +struct instance_data {
  28 + int rx_count;
  29 +};
  30 +
27 31 static void rpmsg_sample_cb(struct rpmsg_channel *rpdev, void *data, int len,
28 32 void *priv, u32 src)
29 33 {
30 34 int ret;
31   - static int rx_count;
  35 + struct instance_data *idata = dev_get_drvdata(&rpdev->dev);
32 36  
33   - dev_info(&rpdev->dev, "incoming msg %d (src: 0x%x)\n", ++rx_count, src);
  37 + dev_info(&rpdev->dev, "incoming msg %d (src: 0x%x)\n",
  38 + ++idata->rx_count, src);
34 39  
35 40 print_hex_dump(KERN_DEBUG, __func__, DUMP_PREFIX_NONE, 16, 1,
36 41 data, len, true);
37 42  
38 43 /* samples should not live forever */
39   - if (rx_count >= MSG_LIMIT) {
  44 + if (idata->rx_count >= MSG_LIMIT) {
40 45 dev_info(&rpdev->dev, "goodbye!\n");
41 46 return;
42 47 }
43 48  
... ... @@ -50,9 +55,17 @@
50 55 static int rpmsg_sample_probe(struct rpmsg_channel *rpdev)
51 56 {
52 57 int ret;
  58 + struct instance_data *idata;
53 59  
54 60 dev_info(&rpdev->dev, "new channel: 0x%x -> 0x%x!\n",
55 61 rpdev->src, rpdev->dst);
  62 +
  63 + idata = devm_kzalloc(&rpdev->dev, sizeof(*idata), GFP_KERNEL);
  64 + if (!idata) {
  65 + dev_err(&rpdev->dev, "channel data memory allocation failed\n");
  66 + return -ENOMEM;
  67 + }
  68 + dev_set_drvdata(&rpdev->dev, idata);
56 69  
57 70 /* send a message to our remote processor */
58 71 ret = rpmsg_send(rpdev, MSG, strlen(MSG));