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From: Shaopeng He <shaopeng.he@intel.com>
To: dev@dpdk.org
Date: Fri, 5 Feb 2016 12:57:45 +0800
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Subject: [dpdk-dev] [PATCH v6 1/6] fm10k: implement rx_descriptor_done
function
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rx_descriptor_done is used by interrupt mode example application
(l3fwd-power) to check rxd DD bit to decide the RX trend,
then l3fwd-power will adjust the cpu frequency according to
the result.
Signed-off-by: Shaopeng He <shaopeng.he@intel.com>
Acked-by: Jing Chen <jing.d.chen@intel.com>
Acked-by: Michael Qiu <michael.qiu@intel.com>
---
v5 change:
- fix a wrong error message
---
drivers/net/fm10k/fm10k.h | 3 +++
drivers/net/fm10k/fm10k_ethdev.c | 1 +
drivers/net/fm10k/fm10k_rxtx.c | 25 +++++++++++++++++++++++++
3 files changed, 29 insertions(+)
diff --git a/drivers/net/fm10k/fm10k.h b/drivers/net/fm10k/fm10k.h
index cd38af2..e2f677a 100644
--- a/drivers/net/fm10k/fm10k.h
+++ b/drivers/net/fm10k/fm10k.h
@@ -345,6 +345,9 @@ uint16_t fm10k_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
uint16_t fm10k_recv_scattered_pkts(void *rx_queue,
struct rte_mbuf **rx_pkts, uint16_t nb_pkts);
+int
+fm10k_dev_rx_descriptor_done(void *rx_queue, uint16_t offset);
+
uint16_t fm10k_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
uint16_t nb_pkts);
diff --git a/drivers/net/fm10k/fm10k_ethdev.c b/drivers/net/fm10k/fm10k_ethdev.c
index e4aed94..d39c33b 100644
--- a/drivers/net/fm10k/fm10k_ethdev.c
+++ b/drivers/net/fm10k/fm10k_ethdev.c
@@ -2435,6 +2435,7 @@ static const struct eth_dev_ops fm10k_eth_dev_ops = {
.rx_queue_release = fm10k_rx_queue_release,
.tx_queue_setup = fm10k_tx_queue_setup,
.tx_queue_release = fm10k_tx_queue_release,
+ .rx_descriptor_done = fm10k_dev_rx_descriptor_done,
.reta_update = fm10k_reta_update,
.reta_query = fm10k_reta_query,
.rss_hash_update = fm10k_rss_hash_update,
diff --git a/drivers/net/fm10k/fm10k_rxtx.c b/drivers/net/fm10k/fm10k_rxtx.c
index e958865..0002f09 100644
--- a/drivers/net/fm10k/fm10k_rxtx.c
+++ b/drivers/net/fm10k/fm10k_rxtx.c
@@ -369,6 +369,31 @@ fm10k_recv_scattered_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
return nb_rcv;
}
+int
+fm10k_dev_rx_descriptor_done(void *rx_queue, uint16_t offset)
+{
+ volatile union fm10k_rx_desc *rxdp;
+ struct fm10k_rx_queue *rxq = rx_queue;
+ uint16_t desc;
+ int ret;
+
+ if (unlikely(offset >= rxq->nb_desc)) {
+ PMD_DRV_LOG(ERR, "Invalid RX descriptor offset %u", offset);
+ return 0;
+ }
+
+ desc = rxq->next_dd + offset;
+ if (desc >= rxq->nb_desc)
+ desc -= rxq->nb_desc;
+
+ rxdp = &rxq->hw_ring[desc];
+
+ ret = !!(rxdp->w.status &
+ rte_cpu_to_le_16(FM10K_RXD_STATUS_DD));
+
+ return ret;
+}
+
static inline void tx_free_descriptors(struct fm10k_tx_queue *q)
{
uint16_t next_rs, count = 0;
--
1.9.3