rpmsg: glink: Add support to preallocate intents

The base intents prequeued during channel creation may not satisfy a
channel's throughput requirement. Add support for intents dt-binding to
allow channels to specify the size and amount of intents to prequeue
during endpoint announcement.

Signed-off-by: Chris Lew <clew@codeaurora.org>
[bjorn: Altered how defaults are expressed]
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c
index fcd46ab090a7760629c58e51fbcbb5c73e90d8dd..2dff77882ced41ae6393ec5c227a12f5c89a56a0 100644 (file)
--- a/drivers/rpmsg/qcom_glink_native.c
+++ b/drivers/rpmsg/qcom_glink_native.c
@@ -1149,19 +1149,38 @@ static struct rpmsg_endpoint *qcom_glink_create_ept(struct rpmsg_device *rpdev,
 static int qcom_glink_announce_create(struct rpmsg_device *rpdev)
 {
        struct glink_channel *channel = to_glink_channel(rpdev->ept);
-       struct glink_core_rx_intent *intent;
+       struct device_node *np = rpdev->dev.of_node;
        struct qcom_glink *glink = channel->glink;
-       int num_intents = glink->intentless ? 0 : 5;
+       struct glink_core_rx_intent *intent;
+       const struct property *prop = NULL;
+       __be32 defaults[] = { cpu_to_be32(SZ_1K), cpu_to_be32(5) };
+       int num_intents;
+       int num_groups = 1;
+       __be32 *val = defaults;
+       int size;
+
+       if (glink->intentless)
+               return 0;
+
+       prop = of_find_property(np, "qcom,intents", NULL);
+       if (prop) {
+               val = prop->value;
+               num_groups = prop->length / sizeof(u32) / 2;
+       }
 
        /* Channel is now open, advertise base set of intents */
-       while (num_intents--) {
-               intent = qcom_glink_alloc_intent(glink, channel, SZ_1K, true);
-               if (!intent)
-                       break;
+       while (num_groups--) {
+               size = be32_to_cpup(val++);
+               num_intents = be32_to_cpup(val++);
+               while (num_intents--) {
+                       intent = qcom_glink_alloc_intent(glink, channel, size,
+                                                        true);
+                       if (!intent)
+                               break;
 
-               qcom_glink_advertise_intent(glink, channel, intent);
+                       qcom_glink_advertise_intent(glink, channel, intent);
+               }
        }
-
        return 0;
 }