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From: Chenxu Di <chenxux.di@intel.com>
To: dev@dpdk.org
Cc: Yang Qiming <qiming.yang@intel.com>, Chenxu Di <chenxux.di@intel.com>
Subject: [dpdk-dev] [PATCH v4 3/5] net/ice: cleanup Tx buffers
Date: Tue, 24 Dec 2019 02:39:04 +0000
Message-ID: <20191224023906.60789-4-chenxux.di@intel.com> (raw)
In-Reply-To: <20191224023906.60789-1-chenxux.di@intel.com>

Add support to the ice driver for the API rte_eth_tx_done_cleanup
to force free consumed buffers on Tx ring.

Signed-off-by: Chenxu Di <chenxux.di@intel.com>
---
 drivers/net/ice/ice_ethdev.c |   1 +
 drivers/net/ice/ice_rxtx.c   | 123 +++++++++++++++++++++++++++++++++++
 drivers/net/ice/ice_rxtx.h   |   1 +
 3 files changed, 125 insertions(+)

diff --git a/drivers/net/ice/ice_ethdev.c b/drivers/net/ice/ice_ethdev.c
index de189daba..b55cdbf74 100644
--- a/drivers/net/ice/ice_ethdev.c
+++ b/drivers/net/ice/ice_ethdev.c
@@ -220,6 +220,7 @@ static const struct eth_dev_ops ice_eth_dev_ops = {
 	.filter_ctrl                  = ice_dev_filter_ctrl,
 	.udp_tunnel_port_add          = ice_dev_udp_tunnel_port_add,
 	.udp_tunnel_port_del          = ice_dev_udp_tunnel_port_del,
+	.tx_done_cleanup              = ice_tx_done_cleanup,
 };
 
 /* store statistics names and its offset in stats structure */
diff --git a/drivers/net/ice/ice_rxtx.c b/drivers/net/ice/ice_rxtx.c
index 2db174456..4aead98fd 100644
--- a/drivers/net/ice/ice_rxtx.c
+++ b/drivers/net/ice/ice_rxtx.c
@@ -863,6 +863,129 @@ ice_fdir_tx_queue_stop(struct rte_eth_dev *dev, uint16_t tx_queue_id)
 	return 0;
 }
 
+
+int ice_tx_done_cleanup(void *q, uint32_t free_cnt)
+{
+	struct ice_tx_queue *txq = (struct ice_tx_queue *)q;
+	struct ice_tx_entry *sw_ring;
+	volatile struct ice_tx_desc *txr;
+	uint16_t tx_first; /* First segment analyzed. */
+	uint16_t tx_id;    /* Current segment being processed. */
+	uint16_t tx_last;  /* Last segment in the current packet. */
+	uint16_t tx_next;  /* First segment of the next packet. */
+	int count;
+
+	if (txq == NULL)
+		return -ENODEV;
+
+	count = 0;
+	sw_ring = txq->sw_ring;
+	txr = txq->tx_ring;
+
+	/*
+	 * tx_tail is the last sent packet on the sw_ring. Goto the end
+	 * of that packet (the last segment in the packet chain) and
+	 * then the next segment will be the start of the oldest segment
+	 * in the sw_ring. This is the first packet that will be
+	 * attempted to be freed.
+	 */
+
+	/* Get last segment in most recently added packet. */
+	tx_first = sw_ring[txq->tx_tail].last_id;
+
+	/* Get the next segment, which is the oldest segment in ring. */
+	tx_first = sw_ring[tx_first].next_id;
+
+	/* Set the current index to the first. */
+	tx_id = tx_first;
+
+	/*
+	 * Loop through each packet. For each packet, verify that an
+	 * mbuf exists and that the last segment is free. If so, free
+	 * it and move on.
+	 */
+	while (1) {
+		tx_last = sw_ring[tx_id].last_id;
+
+		if (sw_ring[tx_last].mbuf) {
+			if ((txr[tx_last].cmd_type_offset_bsz &
+				rte_cpu_to_le_64(ICE_TXD_QW1_DTYPE_M)) !=
+				rte_cpu_to_le_64(ICE_TX_DESC_DTYPE_DESC_DONE)) {
+				/*
+				 * Increment the number of packets
+				 * freed.
+				 */
+				count++;
+
+				/* Get the start of the next packet. */
+				tx_next = sw_ring[tx_last].next_id;
+
+				/*
+				 * Loop through all segments in a
+				 * packet.
+				 */
+				do {
+					rte_pktmbuf_free_seg(sw_ring[tx_id].mbuf);
+					sw_ring[tx_id].mbuf = NULL;
+					sw_ring[tx_id].last_id = tx_id;
+
+					/* Move to next segemnt. */
+					tx_id = sw_ring[tx_id].next_id;
+
+				} while (tx_id != tx_next);
+
+				if (unlikely(count == (int)free_cnt))
+					break;
+			} else {
+				/*
+				 * mbuf still in use, nothing left to
+				 * free.
+				 */
+				break;
+			}
+		} else {
+			/*
+			 * There are multiple reasons to be here:
+			 * 1) All the packets on the ring have been
+			 *    freed - tx_id is equal to tx_first
+			 *    and some packets have been freed.
+			 *    - Done, exit
+			 * 2) Interfaces has not sent a rings worth of
+			 *    packets yet, so the segment after tail is
+			 *    still empty. Or a previous call to this
+			 *    function freed some of the segments but
+			 *    not all so there is a hole in the list.
+			 *    Hopefully this is a rare case.
+			 *    - Walk the list and find the next mbuf. If
+			 *      there isn't one, then done.
+			 */
+			if (likely(tx_id == tx_first && count != 0))
+				break;
+
+			/*
+			 * Walk the list and find the next mbuf, if any.
+			 */
+			do {
+				/* Move to next segemnt. */
+				tx_id = sw_ring[tx_id].next_id;
+
+				if (sw_ring[tx_id].mbuf)
+					break;
+
+			} while (tx_id != tx_first);
+
+			/*
+			 * Determine why previous loop bailed. If there
+			 * is not an mbuf, done.
+			 */
+			if (sw_ring[tx_id].mbuf == NULL)
+				break;
+		}
+	}
+
+	return count;
+}
+
 int
 ice_rx_queue_setup(struct rte_eth_dev *dev,
 		   uint16_t queue_idx,
diff --git a/drivers/net/ice/ice_rxtx.h b/drivers/net/ice/ice_rxtx.h
index 9e3d2cd07..8d4232a61 100644
--- a/drivers/net/ice/ice_rxtx.h
+++ b/drivers/net/ice/ice_rxtx.h
@@ -183,6 +183,7 @@ int ice_rx_descriptor_status(void *rx_queue, uint16_t offset);
 int ice_tx_descriptor_status(void *tx_queue, uint16_t offset);
 void ice_set_default_ptype_table(struct rte_eth_dev *dev);
 const uint32_t *ice_dev_supported_ptypes_get(struct rte_eth_dev *dev);
+int ice_tx_done_cleanup(void *txq, uint32_t free_cnt);
 
 int ice_rx_vec_dev_check(struct rte_eth_dev *dev);
 int ice_tx_vec_dev_check(struct rte_eth_dev *dev);
-- 
2.17.1


  parent reply index

Thread overview: 74+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-03  5:51 [dpdk-dev] [PATCH 0/4] drivers/net: " Chenxu Di
2019-12-03  5:51 ` [dpdk-dev] [PATCH 1/4] net/fm10k: " Chenxu Di
2019-12-03  5:51 ` [dpdk-dev] [PATCH 2/4] net/i40e: " Chenxu Di
2019-12-03  5:51 ` [dpdk-dev] [PATCH 3/4] net/ice: " Chenxu Di
2019-12-03  5:51 ` [dpdk-dev] [PATCH 4/4] net/ixgbe: " Chenxu Di
2019-12-20  3:02 ` [dpdk-dev] [PATCH v2 0/5] drivers/net: " Chenxu Di
2019-12-20  3:02   ` [dpdk-dev] [PATCH v2 1/5] net/fm10k: " Chenxu Di
2019-12-20  3:02   ` [dpdk-dev] [PATCH v2 2/5] net/i40e: " Chenxu Di
2019-12-20  3:02   ` [dpdk-dev] [PATCH v2 3/5] net/ice: " Chenxu Di
2019-12-20  3:02   ` [dpdk-dev] [PATCH v2 4/5] net/ixgbe: " Chenxu Di
2019-12-20  3:02   ` [dpdk-dev] [PATCH v2 5/5] net/e1000: " Chenxu Di
2019-12-20  3:15 ` [dpdk-dev] [PATCH v3 0/5] drivers/net: " Chenxu Di
2019-12-20  3:15   ` [dpdk-dev] [PATCH v3 1/5] net/fm10k: " Chenxu Di
2019-12-20  3:15   ` [dpdk-dev] [PATCH v3 2/5] net/i40e: " Chenxu Di
2019-12-20  3:15   ` [dpdk-dev] [PATCH v3 3/5] net/ice: " Chenxu Di
2019-12-20  3:15   ` [dpdk-dev] [PATCH v3 4/5] net/ixgbe: " Chenxu Di
2019-12-20  3:15   ` [dpdk-dev] [PATCH v3 5/5] net/e1000: " Chenxu Di
2019-12-24  2:39 ` [dpdk-dev] [PATCH v4 0/5] drivers/net: " Chenxu Di
2019-12-24  2:39   ` [dpdk-dev] [PATCH v4 1/5] net/fm10k: " Chenxu Di
2019-12-24  2:39   ` [dpdk-dev] [PATCH v4 2/5] net/i40e: " Chenxu Di
2019-12-26  8:24     ` Xing, Beilei
2019-12-24  2:39   ` Chenxu Di [this message]
2019-12-24  2:39   ` [dpdk-dev] [PATCH v4 4/5] net/ixgbe: " Chenxu Di
2019-12-24  2:39   ` [dpdk-dev] [PATCH v4 5/5] net/e1000: " Chenxu Di
2019-12-30  9:38 ` [dpdk-dev] [PATCH v6 0/4] drivers/net: " Chenxu Di
2019-12-30  9:38   ` [dpdk-dev] [PATCH v6 1/4] net/i40e: " Chenxu Di
2019-12-30 13:01     ` Ananyev, Konstantin
2019-12-30  9:38   ` [dpdk-dev] [PATCH v6 2/4] net/ice: " Chenxu Di
2019-12-30  9:38   ` [dpdk-dev] [PATCH v6 3/4] net/ixgbe: " Chenxu Di
2019-12-30 12:53     ` Ananyev, Konstantin
2020-01-03  9:01       ` Di, ChenxuX
2020-01-05 23:36         ` Ananyev, Konstantin
2020-01-06  9:03           ` Di, ChenxuX
2020-01-06 13:26             ` Ananyev, Konstantin
2020-01-07 10:46               ` Di, ChenxuX
2020-01-07 14:09                 ` Ananyev, Konstantin
2020-01-08 10:15                   ` Di, ChenxuX
2020-01-08 15:12                     ` Ananyev, Konstantin
2019-12-30  9:38   ` [dpdk-dev] [PATCH v6 4/4] net/e1000: " Chenxu Di
2020-01-09 10:38 ` [dpdk-dev] [PATCH v7 0/4] drivers/net: " Chenxu Di
2020-01-09 10:38   ` [dpdk-dev] [PATCH v7 1/4] net/i40e: " Chenxu Di
2020-01-09 10:38   ` [dpdk-dev] [PATCH v7 2/4] net/ice: " Chenxu Di
2020-01-09 10:38   ` [dpdk-dev] [PATCH v7 3/4] net/ixgbe: " Chenxu Di
2020-01-09 14:01     ` Ananyev, Konstantin
2020-01-10 10:08       ` Di, ChenxuX
2020-01-10 12:46         ` Ananyev, Konstantin
2020-01-09 10:38   ` [dpdk-dev] [PATCH v7 4/4] net/e1000: " Chenxu Di
2020-01-10  9:58 ` [dpdk-dev] [PATCH v8 0/4] drivers/net: " Chenxu Di
2020-01-10  9:58   ` [dpdk-dev] [PATCH v8 1/4] net/i40e: " Chenxu Di
2020-01-10  9:58   ` [dpdk-dev] [PATCH v8 2/4] net/ice: " Chenxu Di
2020-01-10  9:58   ` [dpdk-dev] [PATCH v8 3/4] net/ixgbe: " Chenxu Di
2020-01-10 13:49     ` Ananyev, Konstantin
2020-01-10  9:59   ` [dpdk-dev] [PATCH v8 4/4] net/e1000: " Chenxu Di
2020-01-13  9:57 ` [dpdk-dev] [PATCH v9 0/4] drivers/net: " Chenxu Di
2020-01-13  9:57   ` [dpdk-dev] [PATCH v9 1/4] net/i40e: " Chenxu Di
2020-01-13 11:08     ` Ananyev, Konstantin
2020-01-13  9:57   ` [dpdk-dev] [PATCH v9 2/4] net/ice: " Chenxu Di
2020-01-14  1:55     ` Yang, Qiming
2020-01-14 12:40     ` Ferruh Yigit
2020-01-15 14:34       ` Ferruh Yigit
2020-01-16  1:40         ` Di, ChenxuX
2020-01-16  7:09           ` [dpdk-dev] [PATCH] net/ice: cleanup for vec path check Xiaolong Ye
2020-01-16 10:19             ` Ferruh Yigit
2020-01-17  2:21             ` Yang, Qiming
2020-01-16  8:43     ` [dpdk-dev] [PATCH v9 2/4] net/ice: cleanup Tx buffers Ferruh Yigit
2020-01-13  9:57   ` [dpdk-dev] [PATCH v9 3/4] net/ixgbe: " Chenxu Di
2020-01-13 11:07     ` Ananyev, Konstantin
2020-01-16  8:44     ` Ferruh Yigit
2020-01-16 14:47     ` Ferruh Yigit
2020-01-16 15:23       ` Ferruh Yigit
2020-01-13  9:57   ` [dpdk-dev] [PATCH v9 4/4] net/e1000: " Chenxu Di
2020-01-13 11:08     ` Ananyev, Konstantin
2020-01-14  2:49     ` Ye Xiaolong
2020-01-14  2:22 ` [dpdk-dev] [PATCH 0/4] drivers/net: " Ye Xiaolong

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