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authorSricharan R <sricharan@codeaurora.org>2017-08-24 12:51:42 +0530
committerBjorn Andersson <bjorn.andersson@linaro.org>2017-08-29 20:34:16 -0700
commit88c6060f5a7f3fc1530b2722d5964945e5174358 (patch)
treec3f363e91b264e156b3f42d0f43f2ce2fdad198c /drivers/rpmsg/qcom_glink_native.c
parent27b9c5b66b23edd4daaf9f455b0b3e54bcc2ae4e (diff)
downloadlinux-88c6060f5a7f3fc1530b2722d5964945e5174358.tar.gz
rpmsg: glink: Handle remote rx done command
Once the remote side sends a rx done ack, check for the intent reuse information from it and suitably discard or reuse the remote passed intent buffers. Acked-by: Arun Kumar Neelakantam <aneela@codeaurora.org> Signed-off-by: Sricharan R <sricharan@codeaurora.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Diffstat (limited to 'drivers/rpmsg/qcom_glink_native.c')
-rw-r--r--drivers/rpmsg/qcom_glink_native.c42
1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c
index 14c53fe5bb94..4faee2d17728 100644
--- a/drivers/rpmsg/qcom_glink_native.c
+++ b/drivers/rpmsg/qcom_glink_native.c
@@ -658,6 +658,40 @@ qcom_glink_alloc_intent(struct qcom_glink *glink,
return intent;
}
+static void qcom_glink_handle_rx_done(struct qcom_glink *glink,
+ u32 cid, uint32_t iid,
+ bool reuse)
+{
+ struct glink_core_rx_intent *intent;
+ struct glink_channel *channel;
+ unsigned long flags;
+
+ spin_lock_irqsave(&glink->idr_lock, flags);
+ channel = idr_find(&glink->rcids, cid);
+ spin_unlock_irqrestore(&glink->idr_lock, flags);
+ if (!channel) {
+ dev_err(glink->dev, "invalid channel id received\n");
+ return;
+ }
+
+ spin_lock_irqsave(&channel->intent_lock, flags);
+ intent = idr_find(&channel->riids, iid);
+
+ if (!intent) {
+ spin_unlock_irqrestore(&channel->intent_lock, flags);
+ dev_err(glink->dev, "invalid intent id received\n");
+ return;
+ }
+
+ intent->in_use = false;
+
+ if (!reuse) {
+ idr_remove(&channel->riids, intent->id);
+ kfree(intent);
+ }
+ spin_unlock_irqrestore(&channel->intent_lock, flags);
+}
+
/**
* qcom_glink_handle_intent_req() - Receive a request for rx_intent
* from remote side
@@ -966,6 +1000,14 @@ static irqreturn_t qcom_glink_native_intr(int irq, void *data)
case RPM_CMD_INTENT:
qcom_glink_handle_intent(glink, param1, param2, avail);
break;
+ case RPM_CMD_RX_DONE:
+ qcom_glink_handle_rx_done(glink, param1, param2, false);
+ qcom_glink_rx_advance(glink, ALIGN(sizeof(msg), 8));
+ break;
+ case RPM_CMD_RX_DONE_W_REUSE:
+ qcom_glink_handle_rx_done(glink, param1, param2, true);
+ qcom_glink_rx_advance(glink, ALIGN(sizeof(msg), 8));
+ break;
case RPM_CMD_RX_INTENT_REQ_ACK:
qcom_glink_handle_intent_req_ack(glink, param1, param2);
qcom_glink_rx_advance(glink, ALIGN(sizeof(msg), 8));