[dpdk-dev] [PATCH v4 0/6] vmxnet3 TSO, tx cksum offload and cleanups

[dpdk-dev] [PATCH v4 0/6] vmxnet3 TSO, tx cksum offload and cleanups

[Yong Wang]

v4:
* moved cleanups to separate patches
* correctly handled multi-seg pkts with data ring used

v3:
* fixed comments from Stephen
* added performance number for tx data ring

v2:
* fixed some logging issues when debug option turned on
* updated the txq_flags check in vmxnet3_dev_tx_queue_setup()

This patchset adds TCP/UDP checksum offload and TSO to vmxnet3 PMD.
One of the use cases is to support STT.  It also restores the tx
data ring feature that was removed from a previous patch.

Yong Wang (6):
  vmxnet3: fix typos and remove unused struct
  vmxnet3: restore tx data ring support
  vmxnet3: cleanup txNumDeferred usage
  vmxnet3: add tx l4 cksum offload
  vmxnet3: add TSO support
  vmxnet3: announce device offload capability

 doc/guides/rel_notes/release_2_3.rst    |  11 +++
 drivers/net/vmxnet3/base/includeCheck.h |  39 --------
 drivers/net/vmxnet3/base/vmxnet3_defs.h |   9 +-
 drivers/net/vmxnet3/vmxnet3_ethdev.c    |  16 +++-
 drivers/net/vmxnet3/vmxnet3_ring.h      |  13 ---
 drivers/net/vmxnet3/vmxnet3_rxtx.c      | 160 +++++++++++++++++++++++++-------
 6 files changed, 151 insertions(+), 97 deletions(-)
 delete mode 100644 drivers/net/vmxnet3/base/includeCheck.h

-- 
1.9.1

[dpdk-dev] [PATCH v4 1/6] vmxnet3: fix typos and remove unused struct

[Yong Wang]

Signed-off-by: Yong Wang <yongwang@vmware.com>
---
 drivers/net/vmxnet3/base/includeCheck.h | 39 ---------------------------------
 drivers/net/vmxnet3/base/vmxnet3_defs.h |  9 +-------
 drivers/net/vmxnet3/vmxnet3_ethdev.c    |  2 +-
 drivers/net/vmxnet3/vmxnet3_ring.h      | 13 -----------
 drivers/net/vmxnet3/vmxnet3_rxtx.c      |  2 +-
 5 files changed, 3 insertions(+), 62 deletions(-)
 delete mode 100644 drivers/net/vmxnet3/base/includeCheck.h

diff --git a/drivers/net/vmxnet3/base/includeCheck.h b/drivers/net/vmxnet3/base/includeCheck.h
deleted file mode 100644
index 310cebe..0000000
--- a/drivers/net/vmxnet3/base/includeCheck.h
+++ /dev/null
@@ -1,39 +0,0 @@
-/*-
- *   BSD LICENSE
- *
- *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
- *   All rights reserved.
- *
- *   Redistribution and use in source and binary forms, with or without
- *   modification, are permitted provided that the following conditions
- *   are met:
- *
- *     * Redistributions of source code must retain the above copyright
- *       notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above copyright
- *       notice, this list of conditions and the following disclaimer in
- *       the documentation and/or other materials provided with the
- *       distribution.
- *     * Neither the name of Intel Corporation nor the names of its
- *       contributors may be used to endorse or promote products derived
- *       from this software without specific prior written permission.
- *
- *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef _INCLUDECHECK_H
-#define _INCLUDECHECK_H
-
-#include "vmxnet3_osdep.h"
-
-#endif /* _INCLUDECHECK_H */
diff --git a/drivers/net/vmxnet3/base/vmxnet3_defs.h b/drivers/net/vmxnet3/base/vmxnet3_defs.h
index 2b56574..68ae8b6 100644
--- a/drivers/net/vmxnet3/base/vmxnet3_defs.h
+++ b/drivers/net/vmxnet3/base/vmxnet3_defs.h
@@ -35,14 +35,7 @@
 #ifndef _VMXNET3_DEFS_H_
 #define _VMXNET3_DEFS_H_
 
-#define INCLUDE_ALLOW_USERLEVEL
-#define INCLUDE_ALLOW_VMKERNEL
-#define INCLUDE_ALLOW_DISTRIBUTE
-#define INCLUDE_ALLOW_VMKDRIVERS
-#define INCLUDE_ALLOW_VMCORE
-#define INCLUDE_ALLOW_MODULE
-#include "includeCheck.h"
-
+#include "vmxnet3_osdep.h"
 #include "upt1_defs.h"
 
 /* all registers are 32 bit wide */
diff --git a/drivers/net/vmxnet3/vmxnet3_ethdev.c b/drivers/net/vmxnet3/vmxnet3_ethdev.c
index c363bf6..d90e62f 100644
--- a/drivers/net/vmxnet3/vmxnet3_ethdev.c
+++ b/drivers/net/vmxnet3/vmxnet3_ethdev.c
@@ -819,7 +819,7 @@ vmxnet3_dev_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vid, int on)
 	else
 		VMXNET3_CLEAR_VFTABLE_ENTRY(hw->shadow_vfta, vid);
 
-	/* don't change active filter if in promiscious mode */
+	/* don't change active filter if in promiscuous mode */
 	if (rxConf->rxMode & VMXNET3_RXM_PROMISC)
 		return 0;
 
diff --git a/drivers/net/vmxnet3/vmxnet3_ring.h b/drivers/net/vmxnet3/vmxnet3_ring.h
index 612487e..15b19e1 100644
--- a/drivers/net/vmxnet3/vmxnet3_ring.h
+++ b/drivers/net/vmxnet3/vmxnet3_ring.h
@@ -130,18 +130,6 @@ struct vmxnet3_txq_stats {
 	uint64_t	tx_ring_full;
 };
 
-typedef struct vmxnet3_tx_ctx {
-	int      ip_type;
-	bool     is_vlan;
-	bool     is_cso;
-
-	uint16_t evl_tag;		/* only valid when is_vlan == TRUE */
-	uint32_t eth_hdr_size;  /* only valid for pkts requesting tso or csum
-							 * offloading */
-	uint32_t ip_hdr_size;
-	uint32_t l4_hdr_size;
-} vmxnet3_tx_ctx_t;
-
 typedef struct vmxnet3_tx_queue {
 	struct vmxnet3_hw            *hw;
 	struct vmxnet3_cmd_ring      cmd_ring;
@@ -155,7 +143,6 @@ typedef struct vmxnet3_tx_queue {
 	uint8_t                      port_id;       /**< Device port identifier. */
 } vmxnet3_tx_queue_t;
 
-
 struct vmxnet3_rxq_stats {
 	uint64_t                     drop_total;
 	uint64_t                     drop_err;
diff --git a/drivers/net/vmxnet3/vmxnet3_rxtx.c b/drivers/net/vmxnet3/vmxnet3_rxtx.c
index 4de5d89..a3154bc 100644
--- a/drivers/net/vmxnet3/vmxnet3_rxtx.c
+++ b/drivers/net/vmxnet3/vmxnet3_rxtx.c
@@ -598,7 +598,7 @@ vmxnet3_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
 		if (unlikely(rxd->btype != VMXNET3_RXD_BTYPE_HEAD)) {
 			PMD_RX_LOG(DEBUG,
 				   "Alert : Misbehaving device, incorrect "
-				   " buffer type used. iPacket dropped.");
+				   " buffer type used. Packet dropped.");
 			rte_pktmbuf_free_seg(rbi->m);
 			goto rcd_done;
 		}
-- 
1.9.1

[dpdk-dev] [PATCH v4 2/6] vmxnet3: restore tx data ring support

[Yong Wang]

Tx data ring support was removed in a previous change that
added multi-seg transmit.  This change adds it back.

According to the original commit (2e849373), 64B pkt
rate with l2fwd improved by ~20% on an Ivy Bridge
server at which point we start to hit some bottleneck
on the rx side.

I also re-did the same test on a different setup (Haswell
processor, ~2.3GHz clock rate) on top of the master
and still observed ~17% performance gains.

Fixes: 7ba5de417e3c ("vmxnet3: support multi-segment transmit")

Signed-off-by: Yong Wang <yongwang@vmware.com>
---
 doc/guides/rel_notes/release_2_3.rst |  5 +++++
 drivers/net/vmxnet3/vmxnet3_rxtx.c   | 17 ++++++++++++++++-
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/doc/guides/rel_notes/release_2_3.rst b/doc/guides/rel_notes/release_2_3.rst
index 99de186..a23c8ac 100644
--- a/doc/guides/rel_notes/release_2_3.rst
+++ b/doc/guides/rel_notes/release_2_3.rst
@@ -15,6 +15,11 @@ EAL
 Drivers
 ~~~~~~~
 
+* **vmxnet3: restore tx data ring.**
+
+  Tx data ring has been shown to improve small pkt forwarding performance
+  on vSphere environment.
+
 
 Libraries
 ~~~~~~~~~
diff --git a/drivers/net/vmxnet3/vmxnet3_rxtx.c b/drivers/net/vmxnet3/vmxnet3_rxtx.c
index a3154bc..4ccab0e 100644
--- a/drivers/net/vmxnet3/vmxnet3_rxtx.c
+++ b/drivers/net/vmxnet3/vmxnet3_rxtx.c
@@ -348,6 +348,7 @@ vmxnet3_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
 		uint32_t first2fill, avail, dw2;
 		struct rte_mbuf *txm = tx_pkts[nb_tx];
 		struct rte_mbuf *m_seg = txm;
+		int copy_size = 0;
 
 		/* Is this packet execessively fragmented, then drop */
 		if (unlikely(txm->nb_segs > VMXNET3_MAX_TXD_PER_PKT)) {
@@ -365,6 +366,14 @@ vmxnet3_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
 			break;
 		}
 
+		if (txm->nb_segs == 1 && rte_pktmbuf_pkt_len(txm) <= VMXNET3_HDR_COPY_SIZE) {
+			struct Vmxnet3_TxDataDesc *tdd;
+
+			tdd = txq->data_ring.base + txq->cmd_ring.next2fill;
+			copy_size = rte_pktmbuf_pkt_len(txm);
+			rte_memcpy(tdd->data, rte_pktmbuf_mtod(txm, char *), copy_size);
+		}
+
 		/* use the previous gen bit for the SOP desc */
 		dw2 = (txq->cmd_ring.gen ^ 0x1) << VMXNET3_TXD_GEN_SHIFT;
 		first2fill = txq->cmd_ring.next2fill;
@@ -377,7 +386,13 @@ vmxnet3_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
 			   transmit buffer size (16K) is greater than
 			   maximum sizeof mbuf segment size. */
 			gdesc = txq->cmd_ring.base + txq->cmd_ring.next2fill;
-			gdesc->txd.addr = RTE_MBUF_DATA_DMA_ADDR(m_seg);
+			if (copy_size)
+				gdesc->txd.addr = rte_cpu_to_le_64(txq->data_ring.basePA +
+								txq->cmd_ring.next2fill *
+								sizeof(struct Vmxnet3_TxDataDesc));
+			else
+				gdesc->txd.addr = RTE_MBUF_DATA_DMA_ADDR(m_seg);
+
 			gdesc->dword[2] = dw2 | m_seg->data_len;
 			gdesc->dword[3] = 0;
 
-- 
1.9.1

[dpdk-dev] [PATCH v4 3/6] vmxnet3: cleanup txNumDeferred usage

[Yong Wang]

Signed-off-by: Yong Wang <yongwang@vmware.com>
---
 drivers/net/vmxnet3/vmxnet3_rxtx.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/net/vmxnet3/vmxnet3_rxtx.c b/drivers/net/vmxnet3/vmxnet3_rxtx.c
index 4ccab0e..f3af2f2 100644
--- a/drivers/net/vmxnet3/vmxnet3_rxtx.c
+++ b/drivers/net/vmxnet3/vmxnet3_rxtx.c
@@ -332,6 +332,8 @@ vmxnet3_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
 	uint16_t nb_tx;
 	vmxnet3_tx_queue_t *txq = tx_queue;
 	struct vmxnet3_hw *hw = txq->hw;
+	Vmxnet3_TxQueueCtrl *txq_ctrl = &txq->shared->ctrl;
+	uint32_t deferred = rte_le_to_cpu_32(txq_ctrl->txNumDeferred);
 
 	if (unlikely(txq->stopped)) {
 		PMD_TX_LOG(DEBUG, "Tx queue is stopped.");
@@ -419,15 +421,14 @@ vmxnet3_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
 		rte_compiler_barrier();
 		gdesc->dword[2] ^= VMXNET3_TXD_GEN;
 
-		txq->shared->ctrl.txNumDeferred++;
+		txq_ctrl->txNumDeferred = rte_cpu_to_le_32(++deferred);
 		nb_tx++;
 	}
 
-	PMD_TX_LOG(DEBUG, "vmxnet3 txThreshold: %u", txq->shared->ctrl.txThreshold);
+	PMD_TX_LOG(DEBUG, "vmxnet3 txThreshold: %u", rte_le_to_cpu_32(txq_ctrl->txThreshold));
 
-	if (txq->shared->ctrl.txNumDeferred >= txq->shared->ctrl.txThreshold) {
-
-		txq->shared->ctrl.txNumDeferred = 0;
+	if (deferred >= rte_le_to_cpu_32(txq_ctrl->txThreshold)) {
+		txq_ctrl->txNumDeferred = 0;
 		/* Notify vSwitch that packets are available. */
 		VMXNET3_WRITE_BAR0_REG(hw, (VMXNET3_REG_TXPROD + txq->queue_id * VMXNET3_REG_ALIGN),
 				       txq->cmd_ring.next2fill);
-- 
1.9.1

[dpdk-dev] [PATCH v4 4/6] vmxnet3: add tx l4 cksum offload

[Yong Wang]

Support TCP/UDP checksum offload.

Signed-off-by: Yong Wang <yongwang@vmware.com>
---
 doc/guides/rel_notes/release_2_3.rst |  3 +++
 drivers/net/vmxnet3/vmxnet3_rxtx.c   | 26 +++++++++++++++++++++++---
 2 files changed, 26 insertions(+), 3 deletions(-)

diff --git a/doc/guides/rel_notes/release_2_3.rst b/doc/guides/rel_notes/release_2_3.rst
index a23c8ac..58205fe 100644
--- a/doc/guides/rel_notes/release_2_3.rst
+++ b/doc/guides/rel_notes/release_2_3.rst
@@ -20,6 +20,9 @@ Drivers
   Tx data ring has been shown to improve small pkt forwarding performance
   on vSphere environment.
 
+* **vmxnet3: add tx l4 cksum offload.**
+
+  Support TCP/UDP checksum offload.
 
 Libraries
 ~~~~~~~~~
diff --git a/drivers/net/vmxnet3/vmxnet3_rxtx.c b/drivers/net/vmxnet3/vmxnet3_rxtx.c
index f3af2f2..2c1bc3c 100644
--- a/drivers/net/vmxnet3/vmxnet3_rxtx.c
+++ b/drivers/net/vmxnet3/vmxnet3_rxtx.c
@@ -415,7 +415,27 @@ vmxnet3_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
 			gdesc->txd.tci = txm->vlan_tci;
 		}
 
-		/* TODO: Add transmit checksum offload here */
+		if (txm->ol_flags & PKT_TX_L4_MASK) {
+			gdesc->txd.om = VMXNET3_OM_CSUM;
+			gdesc->txd.hlen = txm->l2_len + txm->l3_len;
+
+			switch (txm->ol_flags & PKT_TX_L4_MASK) {
+			case PKT_TX_TCP_CKSUM:
+				gdesc->txd.msscof = gdesc->txd.hlen + offsetof(struct tcp_hdr, cksum);
+				break;
+			case PKT_TX_UDP_CKSUM:
+				gdesc->txd.msscof = gdesc->txd.hlen + offsetof(struct udp_hdr, dgram_cksum);
+				break;
+			default:
+				PMD_TX_LOG(WARNING, "requested cksum offload not supported %#llx",
+					   txm->ol_flags & PKT_TX_L4_MASK);
+				abort();
+			}
+		} else {
+			gdesc->txd.hlen = 0;
+			gdesc->txd.om = VMXNET3_OM_NONE;
+			gdesc->txd.msscof = 0;
+		}
 
 		/* flip the GEN bit on the SOP */
 		rte_compiler_barrier();
@@ -729,8 +749,8 @@ vmxnet3_dev_tx_queue_setup(struct rte_eth_dev *dev,
 	PMD_INIT_FUNC_TRACE();
 
 	if ((tx_conf->txq_flags & ETH_TXQ_FLAGS_NOXSUMS) !=
-	    ETH_TXQ_FLAGS_NOXSUMS) {
-		PMD_INIT_LOG(ERR, "TX no support for checksum offload yet");
+	    ETH_TXQ_FLAGS_NOXSUMSCTP) {
+		PMD_INIT_LOG(ERR, "SCTP checksum offload not supported");
 		return -EINVAL;
 	}
 
-- 
1.9.1

[dpdk-dev] [PATCH v4 5/6] vmxnet3: add TSO support

[Yong Wang]

This commit adds vmxnet3 TSO support.

Verified with test-pmd (set fwd csum) that both tso and
non-tso pkts can be successfully transmitted and all
segmentes for a tso pkt are correct on the receiver side.

Signed-off-by: Yong Wang <yongwang@vmware.com>
---
 doc/guides/rel_notes/release_2_3.rst |   3 +
 drivers/net/vmxnet3/vmxnet3_rxtx.c   | 108 ++++++++++++++++++++++++++---------
 2 files changed, 84 insertions(+), 27 deletions(-)

diff --git a/doc/guides/rel_notes/release_2_3.rst b/doc/guides/rel_notes/release_2_3.rst
index 58205fe..ae487bb 100644
--- a/doc/guides/rel_notes/release_2_3.rst
+++ b/doc/guides/rel_notes/release_2_3.rst
@@ -24,6 +24,9 @@ Drivers
 
   Support TCP/UDP checksum offload.
 
+* **vmxnet3: add TSO support.**
+
+
 Libraries
 ~~~~~~~~~
 
diff --git a/drivers/net/vmxnet3/vmxnet3_rxtx.c b/drivers/net/vmxnet3/vmxnet3_rxtx.c
index 2c1bc3c..103294a 100644
--- a/drivers/net/vmxnet3/vmxnet3_rxtx.c
+++ b/drivers/net/vmxnet3/vmxnet3_rxtx.c
@@ -295,27 +295,45 @@ vmxnet3_dev_clear_queues(struct rte_eth_dev *dev)
 	}
 }
 
+static int
+vmxnet3_unmap_pkt(uint16_t eop_idx, vmxnet3_tx_queue_t *txq)
+{
+	int completed = 0;
+	struct rte_mbuf *mbuf;
+
+	/* Release cmd_ring descriptor and free mbuf */
+	VMXNET3_ASSERT(txq->cmd_ring.base[eop_idx].txd.eop == 1);
+
+	mbuf = txq->cmd_ring.buf_info[eop_idx].m;
+	if (mbuf == NULL)
+		rte_panic("EOP desc does not point to a valid mbuf");
+	rte_pktmbuf_free(mbuf);
+
+	txq->cmd_ring.buf_info[eop_idx].m = NULL;
+
+	while (txq->cmd_ring.next2comp != eop_idx) {
+		/* no out-of-order completion */
+		VMXNET3_ASSERT(txq->cmd_ring.base[txq->cmd_ring.next2comp].txd.cq == 0);
+		vmxnet3_cmd_ring_adv_next2comp(&txq->cmd_ring);
+		completed++;
+	}
+
+	/* Mark the txd for which tcd was generated as completed */
+	vmxnet3_cmd_ring_adv_next2comp(&txq->cmd_ring);
+
+	return completed + 1;
+}
+
 static void
 vmxnet3_tq_tx_complete(vmxnet3_tx_queue_t *txq)
 {
 	int completed = 0;
-	struct rte_mbuf *mbuf;
 	vmxnet3_comp_ring_t *comp_ring = &txq->comp_ring;
 	struct Vmxnet3_TxCompDesc *tcd = (struct Vmxnet3_TxCompDesc *)
 		(comp_ring->base + comp_ring->next2proc);
 
 	while (tcd->gen == comp_ring->gen) {
-		/* Release cmd_ring descriptor and free mbuf */
-		VMXNET3_ASSERT(txq->cmd_ring.base[tcd->txdIdx].txd.eop == 1);
-		while (txq->cmd_ring.next2comp != tcd->txdIdx) {
-			mbuf = txq->cmd_ring.buf_info[txq->cmd_ring.next2comp].m;
-			txq->cmd_ring.buf_info[txq->cmd_ring.next2comp].m = NULL;
-			rte_pktmbuf_free_seg(mbuf);
-
-			/* Mark the txd for which tcd was generated as completed */
-			vmxnet3_cmd_ring_adv_next2comp(&txq->cmd_ring);
-			completed++;
-		}
+		completed += vmxnet3_unmap_pkt(tcd->txdIdx, txq);
 
 		vmxnet3_comp_ring_adv_next2proc(comp_ring);
 		tcd = (struct Vmxnet3_TxCompDesc *)(comp_ring->base +
@@ -351,21 +369,43 @@ vmxnet3_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
 		struct rte_mbuf *txm = tx_pkts[nb_tx];
 		struct rte_mbuf *m_seg = txm;
 		int copy_size = 0;
+		bool tso = (txm->ol_flags & PKT_TX_TCP_SEG) != 0;
+		/* # of descriptors needed for a packet. */
+		unsigned count = txm->nb_segs;
 
-		/* Is this packet execessively fragmented, then drop */
-		if (unlikely(txm->nb_segs > VMXNET3_MAX_TXD_PER_PKT)) {
-			++txq->stats.drop_too_many_segs;
-			++txq->stats.drop_total;
+		avail = vmxnet3_cmd_ring_desc_avail(&txq->cmd_ring);
+		if (count > avail) {
+			/* Is command ring full? */
+			if (unlikely(avail == 0)) {
+				PMD_TX_LOG(DEBUG, "No free ring descriptors");
+				txq->stats.tx_ring_full++;
+				txq->stats.drop_total += (nb_pkts - nb_tx);
+				break;
+			}
+
+			/* Command ring is not full but cannot handle the
+			 * multi-segmented packet. Let's try the next packet
+			 * in this case.
+			 */
+			PMD_TX_LOG(DEBUG, "Running out of ring descriptors "
+				   "(avail %d needed %d)", avail, count);
+			txq->stats.drop_total++;
+			if (tso)
+				txq->stats.drop_tso++;
 			rte_pktmbuf_free(txm);
-			++nb_tx;
+			nb_tx++;
 			continue;
 		}
 
-		/* Is command ring full? */
-		avail = vmxnet3_cmd_ring_desc_avail(&txq->cmd_ring);
-		if (txm->nb_segs > avail) {
-			++txq->stats.tx_ring_full;
-			break;
+		/* Drop non-TSO packet that is excessively fragmented */
+		if (unlikely(!tso && count > VMXNET3_MAX_TXD_PER_PKT)) {
+			PMD_TX_LOG(ERROR, "Non-TSO packet cannot occupy more than %d tx "
+				   "descriptors. Packet dropped.", VMXNET3_MAX_TXD_PER_PKT);
+			txq->stats.drop_too_many_segs++;
+			txq->stats.drop_total++;
+			rte_pktmbuf_free(txm);
+			nb_tx++;
+			continue;
 		}
 
 		if (txm->nb_segs == 1 && rte_pktmbuf_pkt_len(txm) <= VMXNET3_HDR_COPY_SIZE) {
@@ -382,11 +422,11 @@ vmxnet3_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
 		do {
 			/* Remember the transmit buffer for cleanup */
 			tbi = txq->cmd_ring.buf_info + txq->cmd_ring.next2fill;
-			tbi->m = m_seg;
 
 			/* NB: the following assumes that VMXNET3 maximum
-			   transmit buffer size (16K) is greater than
-			   maximum sizeof mbuf segment size. */
+			 * transmit buffer size (16K) is greater than
+			 * maximum size of mbuf segment size.
+			 */
 			gdesc = txq->cmd_ring.base + txq->cmd_ring.next2fill;
 			if (copy_size)
 				gdesc->txd.addr = rte_cpu_to_le_64(txq->data_ring.basePA +
@@ -405,6 +445,8 @@ vmxnet3_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
 			dw2 = txq->cmd_ring.gen << VMXNET3_TXD_GEN_SHIFT;
 		} while ((m_seg = m_seg->next) != NULL);
 
+		/* set the last buf_info for the pkt */
+		tbi->m = txm;
 		/* Update the EOP descriptor */
 		gdesc->dword[3] |= VMXNET3_TXD_EOP | VMXNET3_TXD_CQ;
 
@@ -415,7 +457,17 @@ vmxnet3_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
 			gdesc->txd.tci = txm->vlan_tci;
 		}
 
-		if (txm->ol_flags & PKT_TX_L4_MASK) {
+		if (tso) {
+			uint16_t mss = txm->tso_segsz;
+
+			VMXNET3_ASSERT(mss > 0);
+
+			gdesc->txd.hlen = txm->l2_len + txm->l3_len + txm->l4_len;
+			gdesc->txd.om = VMXNET3_OM_TSO;
+			gdesc->txd.msscof = mss;
+
+			deferred += (rte_pktmbuf_pkt_len(txm) - gdesc->txd.hlen + mss - 1) / mss;
+		} else if (txm->ol_flags & PKT_TX_L4_MASK) {
 			gdesc->txd.om = VMXNET3_OM_CSUM;
 			gdesc->txd.hlen = txm->l2_len + txm->l3_len;
 
@@ -431,17 +483,19 @@ vmxnet3_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
 					   txm->ol_flags & PKT_TX_L4_MASK);
 				abort();
 			}
+			deferred++;
 		} else {
 			gdesc->txd.hlen = 0;
 			gdesc->txd.om = VMXNET3_OM_NONE;
 			gdesc->txd.msscof = 0;
+			deferred++;
 		}
 
 		/* flip the GEN bit on the SOP */
 		rte_compiler_barrier();
 		gdesc->dword[2] ^= VMXNET3_TXD_GEN;
 
-		txq_ctrl->txNumDeferred = rte_cpu_to_le_32(++deferred);
+		txq_ctrl->txNumDeferred = rte_cpu_to_le_32(deferred);
 		nb_tx++;
 	}
 
-- 
1.9.1

[dpdk-dev] [PATCH v4 6/6] vmxnet3: announce device offload capability

[Yong Wang]

Signed-off-by: Yong Wang <yongwang@vmware.com>
---
 drivers/net/vmxnet3/vmxnet3_ethdev.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/net/vmxnet3/vmxnet3_ethdev.c b/drivers/net/vmxnet3/vmxnet3_ethdev.c
index d90e62f..8a40127 100644
--- a/drivers/net/vmxnet3/vmxnet3_ethdev.c
+++ b/drivers/net/vmxnet3/vmxnet3_ethdev.c
@@ -693,7 +693,8 @@ vmxnet3_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 }
 
 static void
-vmxnet3_dev_info_get(__attribute__((unused))struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
+vmxnet3_dev_info_get(__attribute__((unused))struct rte_eth_dev *dev,
+		     struct rte_eth_dev_info *dev_info)
 {
 	dev_info->max_rx_queues = VMXNET3_MAX_RX_QUEUES;
 	dev_info->max_tx_queues = VMXNET3_MAX_TX_QUEUES;
@@ -716,6 +717,17 @@ vmxnet3_dev_info_get(__attribute__((unused))struct rte_eth_dev *dev, struct rte_
 		.nb_min = VMXNET3_DEF_TX_RING_SIZE,
 		.nb_align = 1,
 	};
+
+	dev_info->rx_offload_capa =
+		DEV_RX_OFFLOAD_VLAN_STRIP |
+		DEV_RX_OFFLOAD_UDP_CKSUM |
+		DEV_RX_OFFLOAD_TCP_CKSUM;
+
+	dev_info->tx_offload_capa =
+		DEV_TX_OFFLOAD_VLAN_INSERT |
+		DEV_TX_OFFLOAD_TCP_CKSUM |
+		DEV_TX_OFFLOAD_UDP_CKSUM |
+		DEV_TX_OFFLOAD_TCP_TSO;
 }
 
 /* return 0 means link status changed, -1 means not changed */
-- 
1.9.1

Re: [dpdk-dev] [PATCH v4 0/6] vmxnet3 TSO, tx cksum offload and cleanups

[Stephen Hemminger]

On Tue, 12 Jan 2016 18:08:31 -0800
Yong Wang <yongwang@vmware.com> wrote:

> v4:
> * moved cleanups to separate patches
> * correctly handled multi-seg pkts with data ring used
> 
> v3:
> * fixed comments from Stephen
> * added performance number for tx data ring
> 
> v2:
> * fixed some logging issues when debug option turned on
> * updated the txq_flags check in vmxnet3_dev_tx_queue_setup()
> 
> This patchset adds TCP/UDP checksum offload and TSO to vmxnet3 PMD.
> One of the use cases is to support STT.  It also restores the tx
> data ring feature that was removed from a previous patch.
> 
> Yong Wang (6):
>   vmxnet3: fix typos and remove unused struct
>   vmxnet3: restore tx data ring support
>   vmxnet3: cleanup txNumDeferred usage
>   vmxnet3: add tx l4 cksum offload
>   vmxnet3: add TSO support
>   vmxnet3: announce device offload capability
> 
>  doc/guides/rel_notes/release_2_3.rst    |  11 +++
>  drivers/net/vmxnet3/base/includeCheck.h |  39 --------
>  drivers/net/vmxnet3/base/vmxnet3_defs.h |   9 +-
>  drivers/net/vmxnet3/vmxnet3_ethdev.c    |  16 +++-
>  drivers/net/vmxnet3/vmxnet3_ring.h      |  13 ---
>  drivers/net/vmxnet3/vmxnet3_rxtx.c      | 160 +++++++++++++++++++++++++-------
>  6 files changed, 151 insertions(+), 97 deletions(-)
>  delete mode 100644 drivers/net/vmxnet3/base/includeCheck.h
> 

Looks good. The only thing maybe worth adding would be some more checks
int the vmxnet3_dev_configure for unsupported offload bits, etc.

Acked-by: Stephen Hemminger <stephen@networkplumber.org>

Re: [dpdk-dev] [PATCH v4 0/6] vmxnet3 TSO, tx cksum offload and cleanups

[Bruce Richardson]

On Tue, Jan 12, 2016 at 08:56:34PM -0800, Stephen Hemminger wrote:
> On Tue, 12 Jan 2016 18:08:31 -0800
> Yong Wang <yongwang@vmware.com> wrote:
> 
> > v4:
> > * moved cleanups to separate patches
> > * correctly handled multi-seg pkts with data ring used
> > 
> > v3:
> > * fixed comments from Stephen
> > * added performance number for tx data ring
> > 
> > v2:
> > * fixed some logging issues when debug option turned on
> > * updated the txq_flags check in vmxnet3_dev_tx_queue_setup()
> > 
> > This patchset adds TCP/UDP checksum offload and TSO to vmxnet3 PMD.
> > One of the use cases is to support STT.  It also restores the tx
> > data ring feature that was removed from a previous patch.
> > 
> > Yong Wang (6):
> >   vmxnet3: fix typos and remove unused struct
> >   vmxnet3: restore tx data ring support
> >   vmxnet3: cleanup txNumDeferred usage
> >   vmxnet3: add tx l4 cksum offload
> >   vmxnet3: add TSO support
> >   vmxnet3: announce device offload capability
> > 
> >  doc/guides/rel_notes/release_2_3.rst    |  11 +++
> >  drivers/net/vmxnet3/base/includeCheck.h |  39 --------
> >  drivers/net/vmxnet3/base/vmxnet3_defs.h |   9 +-
> >  drivers/net/vmxnet3/vmxnet3_ethdev.c    |  16 +++-
> >  drivers/net/vmxnet3/vmxnet3_ring.h      |  13 ---
> >  drivers/net/vmxnet3/vmxnet3_rxtx.c      | 160 +++++++++++++++++++++++++-------
> >  6 files changed, 151 insertions(+), 97 deletions(-)
> >  delete mode 100644 drivers/net/vmxnet3/base/includeCheck.h
> > 
> 
> Looks good. The only thing maybe worth adding would be some more checks
> int the vmxnet3_dev_configure for unsupported offload bits, etc.
> 
> Acked-by: Stephen Hemminger <stephen@networkplumber.org>

Applied to dpdk-next-net/rel_16_04

Thanks,
Bruce

Re: [dpdk-dev] [PATCH v4 5/6] vmxnet3: add TSO support

[Thomas Monjalon]

2016-01-12 18:08, Yong Wang:
> +               /* Drop non-TSO packet that is excessively fragmented */
> +               if (unlikely(!tso && count > VMXNET3_MAX_TXD_PER_PKT)) {
> +                       PMD_TX_LOG(ERROR, "Non-TSO packet cannot occupy more than %d tx "
> +                                  "descriptors. Packet dropped.", VMXNET3_MAX_TXD_PER_PKT);
> 

It cannot compile because rte_log.h defines RTE_LOG_ERR not RTE_LOG_ERROR.
Will be fixed when rebased on master branch.