Implement the get_mtu ops to return the maximum size of the message that can be sent.
Signed-off-by: Arnaud Pouliquen <[email protected]> --- drivers/rpmsg/qcom_glink_native.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c index 621f1afd4d6b..8a477416a38a 100644 --- a/drivers/rpmsg/qcom_glink_native.c +++ b/drivers/rpmsg/qcom_glink_native.c @@ -1312,6 +1312,29 @@ static int qcom_glink_trysend(struct rpmsg_endpoint *ept, void *data, int len) return __qcom_glink_send(channel, data, len, false); } +static ssize_t qcom_glink_get_mtu(struct rpmsg_endpoint *ept) +{ + struct glink_channel *channel = to_glink_channel(ept); + size_t mtu_size = 0; + struct qcom_glink *glink = channel->glink; + struct glink_core_rx_intent *tmp; + unsigned long flags; + int iid = 0; + + if (!glink->intentless) { + spin_lock_irqsave(&channel->intent_lock, flags); + idr_for_each_entry(&channel->riids, tmp, iid) { + if (tmp->size > mtu_size && !tmp->in_use) + mtu_size = tmp->size; + } + spin_unlock_irqrestore(&channel->intent_lock, flags); + + return mtu_size; + } else { + return qcom_glink_tx_avail(glink); + } +} + /* * Finds the device_node for the glink child interested in this channel. */ @@ -1345,6 +1368,7 @@ static const struct rpmsg_endpoint_ops glink_endpoint_ops = { .destroy_ept = qcom_glink_destroy_ept, .send = qcom_glink_send, .trysend = qcom_glink_trysend, + .get_mtu = qcom_glink_get_mtu, }; static void qcom_glink_rpdev_release(struct device *dev) -- 2.7.4
