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From: Gaetan Rivet <gaetan.rivet@6wind.com>
To: dev@dpdk.org
Cc: Gaetan Rivet <gaetan.rivet@6wind.com>
Date: Mon, 29 May 2017 15:42:21 +0200
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Subject: [dpdk-dev] [PATCH v4 09/12] net/failsafe: add fast burst functions
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Signed-off-by: Gaetan Rivet <gaetan.rivet@6wind.com>
Acked-by: Olga Shern <olgas@mellanox.com>
---
drivers/net/failsafe/failsafe_private.h | 8 +++
drivers/net/failsafe/failsafe_rxtx.c | 124 ++++++++++++++++++++++++++------
2 files changed, 112 insertions(+), 20 deletions(-)
diff --git a/drivers/net/failsafe/failsafe_private.h b/drivers/net/failsafe/failsafe_private.h
index f40ea2f..25a4dac 100644
--- a/drivers/net/failsafe/failsafe_private.h
+++ b/drivers/net/failsafe/failsafe_private.h
@@ -141,11 +141,18 @@ int failsafe_hotplug_alarm_cancel(struct rte_eth_dev *dev);
/* RX / TX */
+void set_burst_fn(struct rte_eth_dev *dev, int force_safe);
+
uint16_t failsafe_rx_burst(void *rxq,
struct rte_mbuf **rx_pkts, uint16_t nb_pkts);
uint16_t failsafe_tx_burst(void *txq,
struct rte_mbuf **tx_pkts, uint16_t nb_pkts);
+uint16_t failsafe_rx_burst_fast(void *rxq,
+ struct rte_mbuf **rx_pkts, uint16_t nb_pkts);
+uint16_t failsafe_tx_burst_fast(void *txq,
+ struct rte_mbuf **tx_pkts, uint16_t nb_pkts);
+
/* ARGS */
int failsafe_args_parse(struct rte_eth_dev *dev, const char *params);
@@ -299,6 +306,7 @@ fs_switch_dev(struct rte_eth_dev *dev)
} else {
return;
}
+ set_burst_fn(dev, 0);
rte_wmb();
}
diff --git a/drivers/net/failsafe/failsafe_rxtx.c b/drivers/net/failsafe/failsafe_rxtx.c
index a45b4e5..c15025f 100644
--- a/drivers/net/failsafe/failsafe_rxtx.c
+++ b/drivers/net/failsafe/failsafe_rxtx.c
@@ -31,16 +31,63 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
+#include <assert.h>
+
#include <rte_mbuf.h>
#include <rte_ethdev.h>
#include "failsafe_private.h"
-/*
- * TODO: write fast version,
- * without additional checks, to be activated once
- * everything has been verified to comply.
- */
+static inline int
+fs_rx_unsafe(struct sub_device *sdev)
+{
+ return (ETH(sdev) == NULL) ||
+ (ETH(sdev)->rx_pkt_burst == NULL) ||
+ (sdev->state != DEV_STARTED);
+}
+
+static inline int
+fs_tx_unsafe(struct sub_device *sdev)
+{
+ return (sdev == NULL) ||
+ (ETH(sdev) == NULL) ||
+ (ETH(sdev)->tx_pkt_burst == NULL) ||
+ (sdev->state != DEV_STARTED);
+}
+
+void
+set_burst_fn(struct rte_eth_dev *dev, int force_safe)
+{
+ struct sub_device *sdev;
+ uint8_t i;
+ int need_safe;
+ int safe_set;
+
+ need_safe = force_safe;
+ FOREACH_SUBDEV(sdev, i, dev)
+ need_safe |= fs_rx_unsafe(sdev);
+ safe_set = (dev->rx_pkt_burst == &failsafe_rx_burst);
+ if (need_safe && !safe_set) {
+ DEBUG("Using safe RX bursts%s",
+ (force_safe ? " (forced)" : ""));
+ dev->rx_pkt_burst = &failsafe_rx_burst;
+ } else if (!need_safe && safe_set) {
+ DEBUG("Using fast RX bursts");
+ dev->rx_pkt_burst = &failsafe_rx_burst_fast;
+ }
+ need_safe = force_safe || fs_tx_unsafe(TX_SUBDEV(dev));
+ safe_set = (dev->tx_pkt_burst == &failsafe_tx_burst);
+ if (need_safe && !safe_set) {
+ DEBUG("Using safe TX bursts%s",
+ (force_safe ? " (forced)" : ""));
+ dev->tx_pkt_burst = &failsafe_tx_burst;
+ } else if (!need_safe && safe_set) {
+ DEBUG("Using fast TX bursts");
+ dev->tx_pkt_burst = &failsafe_tx_burst_fast;
+ }
+ rte_wmb();
+}
+
uint16_t
failsafe_rx_burst(void *queue,
struct rte_mbuf **rx_pkts,
@@ -63,11 +110,7 @@ failsafe_rx_burst(void *queue,
if (i == priv->subs_tail)
i = priv->subs_head;
sdev = &priv->subs[i];
- if (unlikely(ETH(sdev) == NULL))
- continue;
- if (unlikely(ETH(sdev)->rx_pkt_burst == NULL))
- continue;
- if (unlikely(sdev->state != DEV_STARTED))
+ if (unlikely(fs_rx_unsafe(sdev)))
continue;
sub_rxq = ETH(sdev)->data->rx_queues[rxq->qid];
nb_rx = ETH(sdev)->
@@ -80,11 +123,40 @@ failsafe_rx_burst(void *queue,
return 0;
}
-/*
- * TODO: write fast version,
- * without additional checks, to be activated once
- * everything has been verified to comply.
- */
+uint16_t
+failsafe_rx_burst_fast(void *queue,
+ struct rte_mbuf **rx_pkts,
+ uint16_t nb_pkts)
+{
+ struct fs_priv *priv;
+ struct sub_device *sdev;
+ struct rxq *rxq;
+ void *sub_rxq;
+ uint16_t nb_rx;
+ uint8_t nb_polled, nb_subs;
+ uint8_t i;
+
+ rxq = queue;
+ priv = rxq->priv;
+ nb_subs = priv->subs_tail - priv->subs_head;
+ nb_polled = 0;
+ for (i = rxq->last_polled; nb_polled < nb_subs; nb_polled++) {
+ i++;
+ if (i == priv->subs_tail)
+ i = priv->subs_head;
+ sdev = &priv->subs[i];
+ assert(!fs_rx_unsafe(sdev));
+ sub_rxq = ETH(sdev)->data->rx_queues[rxq->qid];
+ nb_rx = ETH(sdev)->
+ rx_pkt_burst(sub_rxq, rx_pkts, nb_pkts);
+ if (nb_rx) {
+ rxq->last_polled = i;
+ return nb_rx;
+ }
+ }
+ return 0;
+}
+
uint16_t
failsafe_tx_burst(void *queue,
struct rte_mbuf **tx_pkts,
@@ -96,12 +168,24 @@ failsafe_tx_burst(void *queue,
txq = queue;
sdev = TX_SUBDEV(txq->priv->dev);
- if (unlikely(sdev == NULL))
- return 0;
- if (unlikely(ETH(sdev) == NULL))
- return 0;
- if (unlikely(ETH(sdev)->tx_pkt_burst == NULL))
+ if (unlikely(fs_tx_unsafe(sdev)))
return 0;
sub_txq = ETH(sdev)->data->tx_queues[txq->qid];
return ETH(sdev)->tx_pkt_burst(sub_txq, tx_pkts, nb_pkts);
}
+
+uint16_t
+failsafe_tx_burst_fast(void *queue,
+ struct rte_mbuf **tx_pkts,
+ uint16_t nb_pkts)
+{
+ struct sub_device *sdev;
+ struct txq *txq;
+ void *sub_txq;
+
+ txq = queue;
+ sdev = TX_SUBDEV(txq->priv->dev);
+ assert(!fs_tx_unsafe(sdev));
+ sub_txq = ETH(sdev)->data->tx_queues[txq->qid];
+ return ETH(sdev)->tx_pkt_burst(sub_txq, tx_pkts, nb_pkts);
+}
--
2.1.4