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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>
zero-colors
Sricharan R 2017-08-24 12:51:42 +05:30 committed by Bjorn Andersson
parent 27b9c5b66b
commit 88c6060f5a
1 changed files with 42 additions and 0 deletions
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42
drivers/rpmsg/qcom_glink_native.c
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@ -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));