/*
* Copyright (c) 2015-2016, Mellanox Technologies. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* 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.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <linux/tcp.h>
#include <linux/if_vlan.h>
#include <net/geneve.h>
#include <net/dsfield.h>
#include "en.h"
#include "en/txrx.h"
#include "ipoib/ipoib.h"
#include "en_accel/en_accel.h"
#include "en_accel/ktls.h"
#include "lib/clock.h"
static void mlx5e_dma_unmap_wqe_err(struct mlx5e_txqsq *sq, u8 num_dma)
{
int i;
for (i = 0; i < num_dma; i++) {
struct mlx5e_sq_dma *last_pushed_dma =
mlx5e_dma_get(sq, --sq->dma_fifo_pc);
mlx5e_tx_dma_unmap(sq->pdev, last_pushed_dma);
}
}
#ifdef CONFIG_MLX5_CORE_EN_DCB
static inline int mlx5e_get_dscp_up(struct mlx5e_priv *priv, struct sk_buff *skb)
{
int dscp_cp = 0;
if (skb->protocol == htons(ETH_P_IP))
dscp_cp = ipv4_get_dsfield(ip_hdr(skb)) >> 2;
else if (skb->protocol == htons(ETH_P_IPV6))
dscp_cp = ipv6_get_dsfield(ipv6_hdr(skb)) >> 2;
return priv->dcbx_dp.dscp2prio[dscp_cp];
}
#endif
u16 mlx5e_select_queue(struct net_device *dev, struct sk_buff *skb,
struct net_device *sb_dev)
{
int txq_ix = netdev_pick_tx(dev, skb, NULL);
struct mlx5e_priv *priv = netdev_priv(dev);
u16 num_channels;
int up = 0;
if (!netdev_get_num_tc(dev))
return txq_ix;
#ifdef CONFIG_MLX5_CORE_EN_DCB
if (priv->dcbx_dp.trust_state == MLX5_QPTS_TRUST_DSCP)
up = mlx5e_get_dscp_up(priv, skb);
else
#endif
if (skb_vlan_tag_present(skb))
up = skb_vlan_tag_get_prio(skb);
/* txq_ix can be larger than num_channels since
* dev->num_real_tx_queues = num_channels * num_tc
*/
num_channels = priv->channels.params.num_channels;
if (txq_ix >= num_channels)
txq_ix = priv->txq2sq[txq_ix]->ch_ix;
return priv->channel_tc2txq[txq_ix][up];
}
static inline int mlx5e_skb_l2_header_offset(struct sk_buff *skb)
{
#define MLX5E_MIN_INLINE (ETH_HLEN + VLAN_HLEN)
return max(skb_network_offset(skb), MLX5E_MIN_INLINE);
}
static inline int mlx5e_skb_l3_header_offset(struct sk_buff *skb)
{
if (skb_transport_header_was_set(skb))
return skb_transport_offset(skb);
else
return mlx5e_skb_l2_header_offset(skb);
}
static inline u16 mlx5e_calc_min_inline(enum mlx5_inline_modes mode,
struct sk_buff *skb)
{
u16 hlen;
switch (mode) {
case MLX5_INLINE_MODE_NONE:
return 0;
case MLX5_INLINE_MODE_TCP_UDP:
hlen = eth_get_headlen(skb->dev, skb->data, skb_headlen(skb));
if (hlen == ETH_HLEN && !skb_vlan_tag_present(skb))
hlen += VLAN_HLEN;
break;
case MLX5_INLINE_MODE_IP:
hlen = mlx5e_skb_l3_header_offset(skb);
break;
case MLX5_INLINE_MODE_L2:
default:
hlen = mlx5e_skb_l2_header_offset(skb);
}
return min_t(u16, hlen, skb_headlen(skb));
}
static inline void mlx5e_insert_vlan(void *start, struct sk_buff *skb, u16 ihs)
{
struct vlan_ethhdr *vhdr = (struct vlan_ethhdr *)start;
int cpy1_sz = 2 * ETH_ALEN;
int cpy2_sz = ihs - cpy1_sz;
memcpy(vhdr, skb->data, cpy1_sz);
vhdr->h_vlan_proto = skb->vlan_proto;
vhdr->h_vlan_TCI = cpu_to_be16(skb_vlan_tag_get(skb));
memcpy(&vhdr->h_vlan_encapsulated_proto, skb->data + cpy1_sz, cpy2_sz);
}
static inline void
mlx5e_txwqe_build_eseg_csum(struct mlx5e_txqsq *sq, struct sk_buff *skb, struct mlx5_wqe_eth_seg *eseg)
{
if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
eseg->cs_flags = MLX5_ETH_WQE_L3_CSUM;
if (skb->encapsulation) {
eseg->cs_flags |= MLX5_ETH_WQE_L3_INNER_CSUM |
MLX5_ETH_WQE_L4_INNER_CSUM;
sq->stats->csum_partial_inner++;
} else {
eseg->cs_flags |= MLX5_ETH_WQE_L4_CSUM;
sq->stats->csum_partial++;
}
} else
sq->stats->csum_none++;
}
static inline u16
mlx5e_tx_get_gso_ihs(struct mlx5e_txqsq *sq, struct sk_buff *skb)
{
struct mlx5e_sq_stats *stats = sq->stats;
u16 ihs;
if (skb->encapsulation) {
ihs = skb_inner_transport_offset(skb) + inner_tcp_hdrlen(skb);
stats->tso_inner_packets++;
stats->tso_inner_bytes += skb->len - ihs;
} else {
if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4)
ihs = skb_transport_offset(skb) + sizeof(struct udphdr);
else
ihs = skb_transport_offset(skb) + tcp_hdrlen(skb);
stats->tso_packets++;
stats->tso_bytes += skb->len - ihs;
}
return ihs;
}
static inline int
mlx5e_txwqe_build_dsegs(struct mlx5e_txqsq *sq, struct sk_buff *skb,
unsigned char *skb_data, u16 headlen,
struct mlx5_wqe_data_seg *dseg)
{
dma_addr_t dma_addr = 0;
u8 num_dma = 0;
int i;
if (headlen) {
dma_addr = dma_map_single(sq->pdev, skb_data, headlen,
DMA_TO_DEVICE);
if (unlikely(dma_mapping_error(sq->pdev, dma_addr)))
goto dma_unmap_wqe_err;
dseg->addr = cpu_to_be64(dma_addr);
dseg->lkey = sq->mkey_be;
dseg->byte_count = cpu_to_be32(headlen);
mlx5e_dma_push(sq, dma_addr, headlen, MLX5E_DMA_MAP_SINGLE);
num_dma++;
dseg++;
}
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
int fsz = skb_frag_size(frag);
dma_addr = skb_frag_dma_map(sq->pdev, frag, 0, fsz,
DMA_TO_DEVICE);
if (unlikely(dma_mapping_error(sq->pdev, dma_addr)))
goto dma_unmap_wqe_err;
dseg->addr = cpu_to_be64(dma_addr);
dseg->lkey = sq->mkey_be;
dseg->byte_count = cpu_to_be32(fsz);
mlx5e_dma_push(sq, dma_addr, fsz, MLX5E_DMA_MAP_PAGE);
num_dma++;
dseg++;
}
return num_dma;
dma_unmap_wqe_err:
mlx5e_dma_unmap_wqe_err(sq, num_dma);
return -ENOMEM;
}
static inline void
mlx5e_txwqe_complete(struct mlx5e_txqsq *sq, struct sk_buff *skb,
u8 opcode, u16 ds_cnt, u8 num_wqebbs, u32 num_bytes, u8 num_dma,
struct mlx5e_tx_wqe_info *wi, struct mlx5_wqe_ctrl_seg *cseg,
bool xmit_more)
{
struct mlx5_wq_cyc *wq = &sq->wq;
bool send_doorbell;
wi->num_bytes = num_bytes;
wi->num_dma = num_dma;
wi->num_wqebbs = num_wqebbs;
wi->skb = skb;
cseg->opmod_idx_opcode = cpu_to_be32((sq->pc << 8) | opcode);
cseg->qpn_ds = cpu_to_be32((sq->sqn << 8) | ds_cnt);
if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP))
skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
sq->pc += wi->num_wqebbs;
if (unlikely(!mlx5e_wqc_has_room_for(wq, sq->cc, sq->pc, sq->stop_room))) {
netif_tx_stop_queue(sq->txq);
sq->stats->stopped++;
}
send_doorbell = __netdev_tx_sent_queue(sq->txq, num_bytes,
xmit_more);
if (send_doorbell)
mlx5e_notify_hw(wq, sq->pc, sq->uar_map, cseg);
}
netdev_tx_t mlx5e_sq_xmit(struct mlx5e_txqsq *sq, struct sk_buff *skb,
struct mlx5e_tx_wqe *wqe, u16 pi, bool xmit_more)
{
struct mlx5_wq_cyc *wq = &sq->wq;
struct mlx5_wqe_ctrl_seg *cseg;
struct mlx5_wqe_eth_seg *eseg;
struct mlx5_wqe_data_seg *dseg;
struct mlx5e_tx_wqe_info *wi;
struct mlx5e_sq_stats *stats = sq->stats;
u16 headlen, ihs, contig_wqebbs_room;
u16 ds_cnt, ds_cnt_inl = 0;
u8 num_wqebbs, opcode;
u32 num_bytes;
int num_dma;
__be16 mss;
/* Calc ihs and ds cnt, no writes to wqe yet */
ds_cnt = sizeof(*wqe) / MLX5_SEND_WQE_DS;
if (skb_is_gso(skb)) {
opcode = MLX5_OPCODE_LSO;
mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
ihs = mlx5e_tx_get_gso_ihs(sq, skb);
num_bytes = skb->len + (skb_shinfo(skb)->gso_segs - 1) * ihs;
stats->packets += skb_shinfo(skb)->gso_segs;
} else {
u8 mode = mlx5e_transport_inline_tx_wqe(wqe) ?
MLX5_INLINE_MODE_TCP_UDP : sq->min_inline_mode;
opcode = MLX5_OPCODE_SEND;
mss = 0;
ihs = mlx5e_calc_min_inline(mode, skb);
num_bytes = max_t(unsigned int, skb->len, ETH_ZLEN);
stats->packets++;
}
stats->bytes += num_bytes;
stats->xmit_more += xmit_more;
headlen = skb->len - ihs - skb->data_len;
ds_cnt += !!headlen;
ds_cnt += skb_shinfo(skb)->nr_frags;
if (ihs) {
ihs += !!skb_vlan_tag_present(skb) * VLAN_HLEN;
ds_cnt_inl = DIV_ROUND_UP(ihs - INL_HDR_START_SZ, MLX5_SEND_WQE_DS);
ds_cnt += ds_cnt_inl;
}
num_wqebbs = DIV_ROUND_UP(ds_cnt, MLX5_SEND_WQEBB_NUM_DS);
contig_wqebbs_room = mlx5_wq_cyc_get_contig_wqebbs(wq, pi);
if (unlikely(contig_wqebbs_room < num_wqebbs)) {
#ifdef CONFIG_MLX5_EN_IPSEC
struct mlx5_wqe_eth_seg cur_eth = wqe->eth;
#endif
#ifdef CONFIG_MLX5_EN_TLS
struct mlx5_wqe_ctrl_seg cur_ctrl = wqe->ctrl;
#endif
mlx5e_fill_sq_frag_edge(sq, wq, pi, contig_wqebbs_room);
wqe = mlx5e_sq_fetch_wqe(sq, sizeof(*wqe), &pi);
#ifdef CONFIG_MLX5_EN_IPSEC
wqe->eth = cur_eth;
#endif
#ifdef CONFIG_MLX5_EN_TLS
wqe->ctrl = cur_ctrl;
#endif
}
/* fill wqe */
wi = &sq->db.wqe_info[pi];
cseg = &wqe->ctrl;
eseg = &wqe->eth;
dseg = wqe->data;
#if IS_ENABLED(CONFIG_GENEVE)
if (skb->encapsulation)
mlx5e_tx_tunnel_accel(skb, eseg);
#endif
mlx5e_txwqe_build_eseg_csum(sq, skb, eseg);
eseg->mss = mss;
if (ihs) {
eseg->inline_hdr.sz = cpu_to_be16(ihs);
if (skb_vlan_tag_present(skb)) {
ihs -= VLAN_HLEN;
mlx5e_insert_vlan(eseg->inline_hdr.start, skb, ihs);
stats->added_vlan_packets++;
} else {
memcpy(eseg->inline_hdr.start, skb->data, ihs);
}
dseg += ds_cnt_inl;
} else if (skb_vlan_tag_present(skb)) {
eseg->insert.type = cpu_to_be16(MLX5_ETH_WQE_INSERT_VLAN);
if (skb->vlan_proto == cpu_to_be16(ETH_P_8021AD))
eseg->insert.type |= cpu_to_be16(MLX5_ETH_WQE_SVLAN);
eseg->insert.vlan_tci = cpu_to_be16(skb_vlan_tag_get(skb));
stats->added_vlan_packets++;
}
num_dma = mlx5e_txwqe_build_dsegs(sq, skb, skb->data + ihs, headlen, dseg);
if (unlikely(num_dma < 0))
goto err_drop;
mlx5e_txwqe_complete(sq, skb, opcode, ds_cnt, num_wqebbs, num_bytes,
num_dma, wi, cseg, xmit_more);
return NETDEV_TX_OK;
err_drop:
stats->dropped++;
dev_kfree_skb_any(skb);
return NETDEV_TX_OK;
}
netdev_tx_t mlx5e_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct mlx5e_priv *priv = netdev_priv(dev);
struct mlx5e_tx_wqe *wqe;
struct mlx5e_txqsq *sq;
u16 pi;
sq = priv->txq2sq[skb_get_queue_mapping(skb)];
wqe = mlx5e_sq_fetch_wqe(sq, sizeof(*wqe), &pi);
/* might send skbs and update wqe and pi */
skb = mlx5e_accel_handle_tx(skb, sq, dev, &wqe, &pi);
if (unlikely(!skb))
return NETDEV_TX_OK;
return mlx5e_sq_xmit(sq, skb, wqe, pi, netdev_xmit_more());
}
static void mlx5e_dump_error_cqe(struct mlx5e_txqsq *sq,
struct mlx5_err_cqe *err_cqe)
{
u32 ci = mlx5_cqwq_get_ci(&sq->cq.wq);
netdev_err(sq->channel->netdev,
"Error cqe on cqn 0x%x, ci 0x%x, sqn 0x%x, opcode 0x%x, syndrome 0x%x, vendor syndrome 0x%x\n",
sq->cq.mcq.cqn, ci, sq->sqn,
get_cqe_opcode((struct mlx5_cqe64 *)err_cqe),
err_cqe->syndrome, err_cqe->vendor_err_synd);
mlx5_dump_err_cqe(sq->cq.mdev, err_cqe);
}
bool mlx5e_poll_tx_cq(struct mlx5e_cq *cq, int napi_budget)
{
struct mlx5e_sq_stats *stats;
struct mlx5e_txqsq *sq;
struct mlx5_cqe64 *cqe;
u32 dma_fifo_cc;
u32 nbytes;
u16 npkts;
u16 sqcc;
int i;
sq = container_of(cq, struct mlx5e_txqsq, cq);
if (unlikely(!test_bit(MLX5E_SQ_STATE_ENABLED, &sq->state)))
return false;
cqe = mlx5_cqwq_get_cqe(&cq->wq);
if (!cqe)
return false;
stats = sq->stats;
npkts = 0;
nbytes = 0;
/* sq->cc must be updated only after mlx5_cqwq_update_db_record(),
* otherwise a cq overrun may occur
*/
sqcc = sq->cc;
/* avoid dirtying sq cache line every cqe */
dma_fifo_cc = sq->dma_fifo_cc;
i = 0;
do {
u16 wqe_counter;
bool last_wqe;
mlx5_cqwq_pop(&cq->wq);
wqe_counter = be16_to_cpu(cqe->wqe_counter);
if (unlikely(get_cqe_opcode(cqe) == MLX5_CQE_REQ_ERR)) {
if (!test_and_set_bit(MLX5E_SQ_STATE_RECOVERING,
&sq->state)) {
mlx5e_dump_error_cqe(sq,
(struct mlx5_err_cqe *)cqe);
queue_work(cq->channel->priv->wq,
&sq->recover_work);
}
stats->cqe_err++;
}
do {
struct mlx5e_tx_wqe_info *wi;
struct sk_buff *skb;
u16 ci;
int j;
last_wqe = (sqcc == wqe_counter);
ci = mlx5_wq_cyc_ctr2ix(&sq->wq, sqcc);
wi = &sq->db.wqe_info[ci];
skb = wi->skb;
if (unlikely(!skb)) {
#ifdef CONFIG_MLX5_EN_TLS
if (wi->resync_dump_frag) {
struct mlx5e_sq_dma *dma =
mlx5e_dma_get(sq, dma_fifo_cc++);
mlx5e_ktls_tx_handle_resync_dump_comp(sq, wi, dma);
}
#endif
sqcc += wi->num_wqebbs;
continue;
}
if (unlikely(skb_shinfo(skb)->tx_flags &
SKBTX_HW_TSTAMP)) {
struct skb_shared_hwtstamps hwts = {};
hwts.hwtstamp =
mlx5_timecounter_cyc2time(sq->clock,
get_cqe_ts(cqe));
skb_tstamp_tx(skb, &hwts);
}
for (j = 0; j < wi->num_dma; j++) {
struct mlx5e_sq_dma *dma =
mlx5e_dma_get(sq, dma_fifo_cc++);
mlx5e_tx_dma_unmap(sq->pdev, dma);
}
npkts++;
nbytes += wi->num_bytes;
sqcc += wi->num_wqebbs;
napi_consume_skb(skb, napi_budget);
} while (!last_wqe);
} while ((++i < MLX5E_TX_CQ_POLL_BUDGET) && (cqe = mlx5_cqwq_get_cqe(&cq->wq)));
stats->cqes += i;
mlx5_cqwq_update_db_record(&cq->wq);
/* ensure cq space is freed before enabling more cqes */
wmb();
sq->dma_fifo_cc = dma_fifo_cc;
sq->cc = sqcc;
netdev_tx_completed_queue(sq->txq, npkts, nbytes);
if (netif_tx_queue_stopped(sq->txq) &&
mlx5e_wqc_has_room_for(&sq->wq, sq->cc, sq->pc, sq->stop_room) &&
!test_bit(MLX5E_SQ_STATE_RECOVERING, &sq->state)) {
netif_tx_wake_queue(sq->txq);
stats->wake++;
}
return (i == MLX5E_TX_CQ_POLL_BUDGET);
}
void mlx5e_free_txqsq_descs(struct mlx5e_txqsq *sq)
{
struct mlx5e_tx_wqe_info *wi;
struct sk_buff *skb;
u16 ci;
int i;
while (sq->cc != sq->pc) {
ci = mlx5_wq_cyc_ctr2ix(&sq->wq, sq->cc);
wi = &sq->db.wqe_info[ci];
skb = wi->skb;
if (!skb) { /* nop */
sq->cc++;
continue;
}
for (i = 0; i < wi->num_dma; i++) {
struct mlx5e_sq_dma *dma =
mlx5e_dma_get(sq, sq->dma_fifo_cc++);
mlx5e_tx_dma_unmap(sq->pdev, dma);
}
dev_kfree_skb_any(skb);
sq->cc += wi->num_wqebbs;
}
}
#ifdef CONFIG_MLX5_CORE_IPOIB
static inline void
mlx5i_txwqe_build_datagram(struct mlx5_av *av, u32 dqpn, u32 dqkey,
struct mlx5_wqe_datagram_seg *dseg)
{
memcpy(&dseg->av, av, sizeof(struct mlx5_av));
dseg->av.dqp_dct = cpu_to_be32(dqpn | MLX5_EXTENDED_UD_AV);
dseg->av.key.qkey.qkey = cpu_to_be32(dqkey);
}
netdev_tx_t mlx5i_sq_xmit(struct mlx5e_txqsq *sq, struct sk_buff *skb,
struct mlx5_av *av, u32 dqpn, u32 dqkey,
bool xmit_more)
{
struct mlx5_wq_cyc *wq = &sq->wq;
struct mlx5i_tx_wqe *wqe;
struct mlx5_wqe_datagram_seg *datagram;
struct mlx5_wqe_ctrl_seg *cseg;
struct mlx5_wqe_eth_seg *eseg;
struct mlx5_wqe_data_seg *dseg;
struct mlx5e_tx_wqe_info *wi;
struct mlx5e_sq_stats *stats = sq->stats;
u16 headlen, ihs, pi, contig_wqebbs_room;
u16 ds_cnt, ds_cnt_inl = 0;
u8 num_wqebbs, opcode;
u32 num_bytes;
int num_dma;
__be16 mss;
/* Calc ihs and ds cnt, no writes to wqe yet */
ds_cnt = sizeof(*wqe) / MLX5_SEND_WQE_DS;
if (skb_is_gso(skb)) {
opcode = MLX5_OPCODE_LSO;
mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
ihs = mlx5e_tx_get_gso_ihs(sq, skb);
num_bytes = skb->len + (skb_shinfo(skb)->gso_segs - 1) * ihs;
stats->packets += skb_shinfo(skb)->gso_segs;
} else {
opcode = MLX5_OPCODE_SEND;
mss = 0;
ihs = mlx5e_calc_min_inline(sq->min_inline_mode, skb);
num_bytes = max_t(unsigned int, skb->len, ETH_ZLEN);
stats->packets++;
}
stats->bytes += num_bytes;
stats->xmit_more += xmit_more;
headlen = skb->len - ihs - skb->data_len;
ds_cnt += !!headlen;
ds_cnt += skb_shinfo(skb)->nr_frags;
if (ihs) {
ds_cnt_inl = DIV_ROUND_UP(ihs - INL_HDR_START_SZ, MLX5_SEND_WQE_DS);
ds_cnt += ds_cnt_inl;
}
num_wqebbs = DIV_ROUND_UP(ds_cnt, MLX5_SEND_WQEBB_NUM_DS);
pi = mlx5_wq_cyc_ctr2ix(wq, sq->pc);
contig_wqebbs_room = mlx5_wq_cyc_get_contig_wqebbs(wq, pi);
if (unlikely(contig_wqebbs_room < num_wqebbs)) {
mlx5e_fill_sq_frag_edge(sq, wq, pi, contig_wqebbs_room);
pi = mlx5_wq_cyc_ctr2ix(wq, sq->pc);
}
mlx5i_sq_fetch_wqe(sq, &wqe, pi);
/* fill wqe */
wi = &sq->db.wqe_info[pi];
cseg = &wqe->ctrl;
datagram = &wqe->datagram;
eseg = &wqe->eth;
dseg = wqe->data;
mlx5i_txwqe_build_datagram(av, dqpn, dqkey, datagram);
mlx5e_txwqe_build_eseg_csum(sq, skb, eseg);
eseg->mss = mss;
if (ihs) {
memcpy(eseg->inline_hdr.start, skb->data, ihs);
eseg->inline_hdr.sz = cpu_to_be16(ihs);
dseg += ds_cnt_inl;
}
num_dma = mlx5e_txwqe_build_dsegs(sq, skb, skb->data + ihs, headlen, dseg);
if (unlikely(num_dma < 0))
goto err_drop;
mlx5e_txwqe_complete(sq, skb, opcode, ds_cnt, num_wqebbs, num_bytes,
num_dma, wi, cseg, xmit_more);
return NETDEV_TX_OK;
err_drop:
stats->dropped++;
dev_kfree_skb_any(skb);
return NETDEV_TX_OK;
}
#endif
