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| author | Sricharan R <sricharan@codeaurora.org> | 2017-08-24 12:51:42 +0530 |
|---|---|---|
| committer | Bjorn Andersson <bjorn.andersson@linaro.org> | 2017-08-29 20:34:16 -0700 |
| commit | 88c6060f5a7f3fc1530b2722d5964945e5174358 (patch) | |
| tree | c3f363e91b264e156b3f42d0f43f2ce2fdad198c /drivers/rpmsg | |
| parent | 27b9c5b66b23edd4daaf9f455b0b3e54bcc2ae4e (diff) | |
| download | linux-exynos-88c6060f5a7f3fc1530b2722d5964945e5174358.tar.gz linux-exynos-88c6060f5a7f3fc1530b2722d5964945e5174358.tar.bz2 linux-exynos-88c6060f5a7f3fc1530b2722d5964945e5174358.zip | |
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')
| -rw-r--r-- | drivers/rpmsg/qcom_glink_native.c | 42 |
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)); |