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Subject[PATCH v2 2/3] rpmsg: glink: Add support to preallocate intents
Date
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>
---

Changes since v1:
- Change intents property string to qcom,intents
- Use np local variable to fit of_find_property call on one line

drivers/rpmsg/qcom_glink_native.c | 37 +++++++++++++++++++++++++++++--------
1 file changed, 29 insertions(+), 8 deletions(-)

diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c
index 5a5e927ea50f..7155adad6ab6 100644
--- a/drivers/rpmsg/qcom_glink_native.c
+++ b/drivers/rpmsg/qcom_glink_native.c
@@ -1143,19 +1143,40 @@ 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;
+ int num_groups = 1;
+ int num_intents;
+ int size;
+ __be32 base[2];
+ int *val = base;
+
+ if (np)
+ prop = of_find_property(np, "qcom,intents", NULL);
+
+ if (prop && !glink->intentless) {
+ val = prop->value;
+ num_groups = prop->length / sizeof(u32) / 2;
+ } else {
+ base[0] = cpu_to_be32(SZ_1K);
+ base[1] = cpu_to_be32(glink->intentless ? 0 : 5);
+ }

/* 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;
}

--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
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