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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>
This commit is contained in:
Chris Lew 2017-10-26 15:28:55 -07:00 committed by Bjorn Andersson
parent eace566c34
commit 073893778d
1 changed files with 27 additions and 8 deletions
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35
drivers/rpmsg/qcom_glink_native.c
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@ -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;
/* 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;
if (glink->intentless)
return 0;
qcom_glink_advertise_intent(glink, channel, intent);
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_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);
}
}
return 0;
}