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Date: Thu, 3 Sep 2020 14:00:14 -0700
From: Saeed Mahameed <saeedm@...dia.com>
To: "David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>
CC: <netdev@...r.kernel.org>,
Maxim Mikityanskiy <maximmi@...lanox.com>,
"Saeed Mahameed" <saeedm@...dia.com>
Subject: [net-next 02/10] net/mlx5e: Refactor xmit functions
From: Maxim Mikityanskiy <maximmi@...lanox.com>
A huge function mlx5e_sq_xmit was split into several to achieve multiple
goals:
1. Reuse the code in IPoIB.
2. Better intergrate with TLS, IPSEC, GENEVE and checksum offloads. Now
it's possible to reserve space in the WQ before running eseg-based
offloads, so:
2.1. It's not needed to copy cseg and eseg after mlx5e_fill_sq_frag_edge
anymore.
2.2. mlx5e_txqsq_get_next_pi will be used instead of the legacy
mlx5e_fill_sq_frag_edge for better code maintainability and reuse.
3. Prepare for the upcoming TX MPWQE for SKBs. It will intervene after
mlx5e_sq_calc_wqe_attr to check if it's possible to use MPWQE, and the
code flow will split into two paths: MPWQE and non-MPWQE.
Two high-level functions are provided to send packets:
* mlx5e_xmit is called by the networking stack, runs offloads and sends
the packet. In one of the following patches, MPWQE support will be added
to this flow.
* mlx5e_sq_xmit_simple is called by the TLS offload, runs only the
checksum offload and sends the packet.
This change has no performance impact in TCP single stream test and
XDP_TX single stream test.
UDP pktgen (burst 32), single stream:
Packet rate: 17.55 Mpps -> 19.23 Mpps
Instructions per packet: 420 -> 360
Cycles per packet: 165 -> 142
CPU: Intel(R) Xeon(R) CPU E5-2680 v3 @ 2.50GHz (x86_64)
NIC: Mellanox ConnectX-6 Dx
To get this performance gain, manual optimizations of function inlining
were performed. It's important to have mlx5e_sq_xmit_wqe inline,
otherwise the packet rate will be 1 Mpps less in UDP pktgen test.
__always_inline is required, because gcc uninlines it when it's called
from two places (mlx5e_xmit and mlx5e_sq_xmit_simple).
Signed-off-by: Maxim Mikityanskiy <maximmi@...lanox.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
.../net/ethernet/mellanox/mlx5/core/en/txrx.h | 63 +--
.../mellanox/mlx5/core/en_accel/en_accel.h | 5 +
.../mellanox/mlx5/core/en_accel/tls_rxtx.c | 6 +-
.../net/ethernet/mellanox/mlx5/core/en_tx.c | 391 ++++++++++--------
4 files changed, 243 insertions(+), 222 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h b/drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h
index 9334c9c3e208..d4ee22789ab0 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h
@@ -41,8 +41,6 @@ void mlx5e_free_rx_in_progress_descs(struct mlx5e_rq *rq);
u16 mlx5e_select_queue(struct net_device *dev, struct sk_buff *skb,
struct net_device *sb_dev);
netdev_tx_t mlx5e_xmit(struct sk_buff *skb, struct net_device *dev);
-void mlx5e_sq_xmit(struct mlx5e_txqsq *sq, struct sk_buff *skb,
- struct mlx5e_tx_wqe *wqe, u16 pi, bool xmit_more);
bool mlx5e_poll_tx_cq(struct mlx5e_cq *cq, int napi_budget);
void mlx5e_free_txqsq_descs(struct mlx5e_txqsq *sq);
@@ -188,23 +186,6 @@ static inline u16 mlx5e_icosq_get_next_pi(struct mlx5e_icosq *sq, u16 size)
return pi;
}
-static inline void
-mlx5e_fill_sq_frag_edge(struct mlx5e_txqsq *sq, struct mlx5_wq_cyc *wq,
- u16 pi, u16 nnops)
-{
- struct mlx5e_tx_wqe_info *edge_wi, *wi = &sq->db.wqe_info[pi];
-
- edge_wi = wi + nnops;
-
- /* fill sq frag edge with nops to avoid wqe wrapping two pages */
- for (; wi < edge_wi; wi++) {
- memset(wi, 0, sizeof(*wi));
- wi->num_wqebbs = 1;
- mlx5e_post_nop(wq, sq->sqn, &sq->pc);
- }
- sq->stats->nop += nnops;
-}
-
static inline void
mlx5e_notify_hw(struct mlx5_wq_cyc *wq, u16 pc, void __iomem *uar_map,
struct mlx5_wqe_ctrl_seg *ctrl)
@@ -223,29 +204,6 @@ mlx5e_notify_hw(struct mlx5_wq_cyc *wq, u16 pc, void __iomem *uar_map,
mlx5_write64((__be32 *)ctrl, uar_map);
}
-static inline bool mlx5e_transport_inline_tx_wqe(struct mlx5_wqe_ctrl_seg *cseg)
-{
- return cseg && !!cseg->tis_tir_num;
-}
-
-static inline u8
-mlx5e_tx_wqe_inline_mode(struct mlx5e_txqsq *sq, struct mlx5_wqe_ctrl_seg *cseg,
- struct sk_buff *skb)
-{
- u8 mode;
-
- if (mlx5e_transport_inline_tx_wqe(cseg))
- return MLX5_INLINE_MODE_TCP_UDP;
-
- mode = sq->min_inline_mode;
-
- if (skb_vlan_tag_present(skb) &&
- test_bit(MLX5E_SQ_STATE_VLAN_NEED_L2_INLINE, &sq->state))
- mode = max_t(u8, MLX5_INLINE_MODE_L2, mode);
-
- return mode;
-}
-
static inline void mlx5e_cq_arm(struct mlx5e_cq *cq)
{
struct mlx5_core_cq *mcq;
@@ -286,6 +244,27 @@ mlx5e_tx_dma_unmap(struct device *pdev, struct mlx5e_sq_dma *dma)
}
}
+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++;
+ }
+}
+
+void mlx5e_sq_xmit_simple(struct mlx5e_txqsq *sq, struct sk_buff *skb, bool xmit_more);
+
static inline void mlx5e_rqwq_reset(struct mlx5e_rq *rq)
{
if (rq->wq_type == MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ) {
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/en_accel.h b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/en_accel.h
index 110476bdeffb..23d4ef5ab9c5 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/en_accel.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/en_accel.h
@@ -145,6 +145,11 @@ static inline bool mlx5e_accel_tx_finish(struct mlx5e_priv *priv,
}
#endif
+#if IS_ENABLED(CONFIG_GENEVE)
+ if (skb->encapsulation)
+ mlx5e_tx_tunnel_accel(skb, &wqe->eth);
+#endif
+
return true;
}
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/tls_rxtx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/tls_rxtx.c
index b0c31d49ff8d..c36560b3e93d 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/tls_rxtx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/tls_rxtx.c
@@ -189,12 +189,10 @@ static bool mlx5e_tls_handle_ooo(struct mlx5e_tls_offload_context_tx *context,
struct mlx5e_tls *tls)
{
u32 tcp_seq = ntohl(tcp_hdr(skb)->seq);
- struct mlx5e_tx_wqe *wqe;
struct sync_info info;
struct sk_buff *nskb;
int linear_len = 0;
int headln;
- u16 pi;
int i;
sq->stats->tls_ooo++;
@@ -246,9 +244,7 @@ static bool mlx5e_tls_handle_ooo(struct mlx5e_tls_offload_context_tx *context,
sq->stats->tls_resync_bytes += nskb->len;
mlx5e_tls_complete_sync_skb(skb, nskb, tcp_seq, headln,
cpu_to_be64(info.rcd_sn));
- pi = mlx5_wq_cyc_ctr2ix(&sq->wq, sq->pc);
- wqe = MLX5E_TX_FETCH_WQE(sq, pi);
- mlx5e_sq_xmit(sq, nskb, wqe, pi, true);
+ mlx5e_sq_xmit_simple(sq, nskb, true);
return true;
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c
index e15aa53ff83e..f967bc0573c0 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c
@@ -144,23 +144,6 @@ static inline void mlx5e_insert_vlan(void *start, struct sk_buff *skb, u16 ihs)
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)
{
@@ -232,22 +215,121 @@ mlx5e_txwqe_build_dsegs(struct mlx5e_txqsq *sq, struct sk_buff *skb,
return -ENOMEM;
}
+struct mlx5e_tx_attr {
+ u32 num_bytes;
+ u16 headlen;
+ u16 ihs;
+ __be16 mss;
+ u8 opcode;
+};
+
+struct mlx5e_tx_wqe_attr {
+ u16 ds_cnt;
+ u16 ds_cnt_inl;
+ u8 num_wqebbs;
+};
+
+static inline u8
+mlx5e_tx_wqe_inline_mode(struct mlx5e_txqsq *sq, struct sk_buff *skb,
+ struct mlx5e_accel_tx_state *accel)
+{
+ u8 mode;
+
+#ifdef CONFIG_MLX5_EN_TLS
+ if (accel && accel->tls.tls_tisn)
+ return MLX5_INLINE_MODE_TCP_UDP;
+#endif
+
+ mode = sq->min_inline_mode;
+
+ if (skb_vlan_tag_present(skb) &&
+ test_bit(MLX5E_SQ_STATE_VLAN_NEED_L2_INLINE, &sq->state))
+ mode = max_t(u8, MLX5_INLINE_MODE_L2, mode);
+
+ return mode;
+}
+
+static inline void mlx5e_sq_xmit_prepare(struct mlx5e_txqsq *sq, struct sk_buff *skb,
+ struct mlx5e_accel_tx_state *accel,
+ struct mlx5e_tx_attr *attr)
+{
+ struct mlx5e_sq_stats *stats = sq->stats;
+
+ if (skb_is_gso(skb)) {
+ u16 ihs = mlx5e_tx_get_gso_ihs(sq, skb);
+
+ *attr = (struct mlx5e_tx_attr) {
+ .opcode = MLX5_OPCODE_LSO,
+ .mss = cpu_to_be16(skb_shinfo(skb)->gso_size),
+ .ihs = ihs,
+ .num_bytes = skb->len + (skb_shinfo(skb)->gso_segs - 1) * ihs,
+ .headlen = skb_headlen(skb) - ihs,
+ };
+
+ stats->packets += skb_shinfo(skb)->gso_segs;
+ } else {
+ u8 mode = mlx5e_tx_wqe_inline_mode(sq, skb, accel);
+ u16 ihs = mlx5e_calc_min_inline(mode, skb);
+
+ *attr = (struct mlx5e_tx_attr) {
+ .opcode = MLX5_OPCODE_SEND,
+ .mss = cpu_to_be16(0),
+ .ihs = ihs,
+ .num_bytes = max_t(unsigned int, skb->len, ETH_ZLEN),
+ .headlen = skb_headlen(skb) - ihs,
+ };
+
+ stats->packets++;
+ }
+
+ stats->bytes += attr->num_bytes;
+}
+
+static inline void mlx5e_sq_calc_wqe_attr(struct sk_buff *skb,
+ const struct mlx5e_tx_attr *attr,
+ struct mlx5e_tx_wqe_attr *wqe_attr)
+{
+ u16 ds_cnt = sizeof(struct mlx5e_tx_wqe) / MLX5_SEND_WQE_DS;
+ u16 ds_cnt_inl = 0;
+
+ ds_cnt += !!attr->headlen + skb_shinfo(skb)->nr_frags;
+
+ if (attr->ihs) {
+ u16 inl = attr->ihs - INL_HDR_START_SZ;
+
+ if (skb_vlan_tag_present(skb))
+ inl += VLAN_HLEN;
+
+ ds_cnt_inl = DIV_ROUND_UP(inl, MLX5_SEND_WQE_DS);
+ ds_cnt += ds_cnt_inl;
+ }
+
+ *wqe_attr = (struct mlx5e_tx_wqe_attr) {
+ .ds_cnt = ds_cnt,
+ .ds_cnt_inl = ds_cnt_inl,
+ .num_wqebbs = DIV_ROUND_UP(ds_cnt, MLX5_SEND_WQEBB_NUM_DS),
+ };
+}
+
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,
+ const struct mlx5e_tx_attr *attr,
+ const struct mlx5e_tx_wqe_attr *wqe_attr, 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;
+ *wi = (struct mlx5e_tx_wqe_info) {
+ .skb = skb,
+ .num_bytes = attr->num_bytes,
+ .num_dma = num_dma,
+ .num_wqebbs = wqe_attr->num_wqebbs,
+ };
- cseg->opmod_idx_opcode = cpu_to_be32((sq->pc << 8) | opcode);
- cseg->qpn_ds = cpu_to_be32((sq->sqn << 8) | ds_cnt);
+ cseg->opmod_idx_opcode = cpu_to_be32((sq->pc << 8) | attr->opcode);
+ cseg->qpn_ds = cpu_to_be32((sq->sqn << 8) | wqe_attr->ds_cnt);
if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP))
skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
@@ -258,105 +340,44 @@ mlx5e_txwqe_complete(struct mlx5e_txqsq *sq, struct sk_buff *skb,
sq->stats->stopped++;
}
- send_doorbell = __netdev_tx_sent_queue(sq->txq, num_bytes,
- xmit_more);
+ send_doorbell = __netdev_tx_sent_queue(sq->txq, attr->num_bytes, xmit_more);
if (send_doorbell)
mlx5e_notify_hw(wq, sq->pc, sq->uar_map, cseg);
}
-void mlx5e_sq_xmit(struct mlx5e_txqsq *sq, struct sk_buff *skb,
- struct mlx5e_tx_wqe *wqe, u16 pi, bool xmit_more)
+static __always_inline void
+mlx5e_sq_xmit_wqe(struct mlx5e_txqsq *sq, struct sk_buff *skb,
+ const struct mlx5e_tx_attr *attr, const struct mlx5e_tx_wqe_attr *wqe_attr,
+ 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_tx_wqe_inline_mode(sq, &wqe->ctrl, skb);
-
- 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) {
- u16 inl = ihs + !!skb_vlan_tag_present(skb) * VLAN_HLEN - INL_HDR_START_SZ;
-
- ds_cnt_inl = DIV_ROUND_UP(inl, 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);
- pi = mlx5_wq_cyc_ctr2ix(wq, sq->pc);
- wqe = MLX5E_TX_FETCH_WQE(sq, 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;
+ eseg->mss = attr->mss;
- if (ihs) {
+ if (attr->ihs) {
if (skb_vlan_tag_present(skb)) {
- eseg->inline_hdr.sz = cpu_to_be16(ihs + VLAN_HLEN);
- mlx5e_insert_vlan(eseg->inline_hdr.start, skb, ihs);
+ eseg->inline_hdr.sz = cpu_to_be16(attr->ihs + VLAN_HLEN);
+ mlx5e_insert_vlan(eseg->inline_hdr.start, skb, attr->ihs);
stats->added_vlan_packets++;
} else {
- eseg->inline_hdr.sz = cpu_to_be16(ihs);
- memcpy(eseg->inline_hdr.start, skb->data, ihs);
+ eseg->inline_hdr.sz = cpu_to_be16(attr->ihs);
+ memcpy(eseg->inline_hdr.start, skb->data, attr->ihs);
}
- dseg += ds_cnt_inl;
+ dseg += wqe_attr->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))
@@ -365,12 +386,12 @@ void mlx5e_sq_xmit(struct mlx5e_txqsq *sq, struct sk_buff *skb,
stats->added_vlan_packets++;
}
- num_dma = mlx5e_txwqe_build_dsegs(sq, skb, skb->data + ihs, headlen, dseg);
+ num_dma = mlx5e_txwqe_build_dsegs(sq, skb, skb->data + attr->ihs,
+ attr->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);
+ mlx5e_txwqe_complete(sq, skb, attr, wqe_attr, num_dma, wi, cseg, xmit_more);
return;
@@ -383,6 +404,8 @@ netdev_tx_t mlx5e_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct mlx5e_priv *priv = netdev_priv(dev);
struct mlx5e_accel_tx_state accel = {};
+ struct mlx5e_tx_wqe_attr wqe_attr;
+ struct mlx5e_tx_attr attr;
struct mlx5e_tx_wqe *wqe;
struct mlx5e_txqsq *sq;
u16 pi;
@@ -393,19 +416,64 @@ netdev_tx_t mlx5e_xmit(struct sk_buff *skb, struct net_device *dev)
if (unlikely(!mlx5e_accel_tx_begin(dev, sq, skb, &accel)))
goto out;
- pi = mlx5_wq_cyc_ctr2ix(&sq->wq, sq->pc);
+ mlx5e_sq_xmit_prepare(sq, skb, &accel, &attr);
+ mlx5e_sq_calc_wqe_attr(skb, &attr, &wqe_attr);
+ pi = mlx5e_txqsq_get_next_pi(sq, wqe_attr.num_wqebbs);
wqe = MLX5E_TX_FETCH_WQE(sq, pi);
/* May update the WQE, but may not post other WQEs. */
if (unlikely(!mlx5e_accel_tx_finish(priv, sq, skb, wqe, &accel)))
goto out;
- mlx5e_sq_xmit(sq, skb, wqe, pi, netdev_xmit_more());
+ mlx5e_txwqe_build_eseg_csum(sq, skb, &wqe->eth);
+ mlx5e_sq_xmit_wqe(sq, skb, &attr, &wqe_attr, wqe, pi, netdev_xmit_more());
out:
return NETDEV_TX_OK;
}
+void mlx5e_sq_xmit_simple(struct mlx5e_txqsq *sq, struct sk_buff *skb, bool xmit_more)
+{
+ struct mlx5e_tx_wqe_attr wqe_attr;
+ struct mlx5e_tx_attr attr;
+ struct mlx5e_tx_wqe *wqe;
+ u16 pi;
+
+ mlx5e_sq_xmit_prepare(sq, skb, NULL, &attr);
+ mlx5e_sq_calc_wqe_attr(skb, &attr, &wqe_attr);
+ pi = mlx5e_txqsq_get_next_pi(sq, wqe_attr.num_wqebbs);
+ wqe = MLX5E_TX_FETCH_WQE(sq, pi);
+ mlx5e_txwqe_build_eseg_csum(sq, skb, &wqe->eth);
+ mlx5e_sq_xmit_wqe(sq, skb, &attr, &wqe_attr, wqe, pi, xmit_more);
+}
+
+static inline void mlx5e_tx_wi_dma_unmap(struct mlx5e_txqsq *sq,
+ struct mlx5e_tx_wqe_info *wi,
+ u32 *dma_fifo_cc)
+{
+ int i;
+
+ for (i = 0; i < wi->num_dma; i++) {
+ struct mlx5e_sq_dma *dma = mlx5e_dma_get(sq, (*dma_fifo_cc)++);
+
+ mlx5e_tx_dma_unmap(sq->pdev, dma);
+ }
+}
+
+static inline void mlx5e_consume_skb(struct mlx5e_txqsq *sq, struct sk_buff *skb,
+ struct mlx5_cqe64 *cqe, int napi_budget)
+{
+ if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) {
+ struct skb_shared_hwtstamps hwts = {};
+ u64 ts = get_cqe_ts(cqe);
+
+ hwts.hwtstamp = mlx5_timecounter_cyc2time(sq->clock, ts);
+ skb_tstamp_tx(skb, &hwts);
+ }
+
+ napi_consume_skb(skb, napi_budget);
+}
+
bool mlx5e_poll_tx_cq(struct mlx5e_cq *cq, int napi_budget)
{
struct mlx5e_sq_stats *stats;
@@ -452,7 +520,6 @@ bool mlx5e_poll_tx_cq(struct mlx5e_cq *cq, int napi_budget)
do {
struct sk_buff *skb;
- int j;
last_wqe = (sqcc == wqe_counter);
@@ -460,33 +527,18 @@ bool mlx5e_poll_tx_cq(struct mlx5e_cq *cq, int napi_budget)
wi = &sq->db.wqe_info[ci];
skb = wi->skb;
+ sqcc += wi->num_wqebbs;
+
if (unlikely(!skb)) {
mlx5e_ktls_tx_handle_resync_dump_comp(sq, wi, &dma_fifo_cc);
- 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);
- }
+ mlx5e_tx_wi_dma_unmap(sq, wi, &dma_fifo_cc);
+ mlx5e_consume_skb(sq, wi->skb, cqe, napi_budget);
npkts++;
nbytes += wi->num_bytes;
- sqcc += wi->num_wqebbs;
- napi_consume_skb(skb, napi_budget);
} while (!last_wqe);
if (unlikely(get_cqe_opcode(cqe) == MLX5_CQE_REQ_ERR)) {
@@ -531,7 +583,6 @@ void mlx5e_free_txqsq_descs(struct mlx5e_txqsq *sq)
u32 dma_fifo_cc, nbytes = 0;
u16 ci, sqcc, npkts = 0;
struct sk_buff *skb;
- int i;
sqcc = sq->cc;
dma_fifo_cc = sq->dma_fifo_cc;
@@ -541,23 +592,18 @@ void mlx5e_free_txqsq_descs(struct mlx5e_txqsq *sq)
wi = &sq->db.wqe_info[ci];
skb = wi->skb;
+ sqcc += wi->num_wqebbs;
+
if (!skb) {
mlx5e_ktls_tx_handle_resync_dump_comp(sq, wi, &dma_fifo_cc);
- sqcc += wi->num_wqebbs;
continue;
}
- for (i = 0; i < wi->num_dma; i++) {
- struct mlx5e_sq_dma *dma =
- mlx5e_dma_get(sq, dma_fifo_cc++);
-
- mlx5e_tx_dma_unmap(sq->pdev, dma);
- }
-
+ mlx5e_tx_wi_dma_unmap(sq, wi, &dma_fifo_cc);
dev_kfree_skb_any(skb);
+
npkts++;
nbytes += wi->num_bytes;
- sqcc += wi->num_wqebbs;
}
sq->dma_fifo_cc = dma_fifo_cc;
@@ -576,9 +622,34 @@ mlx5i_txwqe_build_datagram(struct mlx5_av *av, u32 dqpn, u32 dqkey,
dseg->av.key.qkey.qkey = cpu_to_be32(dqkey);
}
+static void mlx5i_sq_calc_wqe_attr(struct sk_buff *skb,
+ const struct mlx5e_tx_attr *attr,
+ struct mlx5e_tx_wqe_attr *wqe_attr)
+{
+ u16 ds_cnt = sizeof(struct mlx5i_tx_wqe) / MLX5_SEND_WQE_DS;
+ u16 ds_cnt_inl = 0;
+
+ ds_cnt += !!attr->headlen + skb_shinfo(skb)->nr_frags;
+
+ if (attr->ihs) {
+ u16 inl = attr->ihs - INL_HDR_START_SZ;
+
+ ds_cnt_inl = DIV_ROUND_UP(inl, MLX5_SEND_WQE_DS);
+ ds_cnt += ds_cnt_inl;
+ }
+
+ *wqe_attr = (struct mlx5e_tx_wqe_attr) {
+ .ds_cnt = ds_cnt,
+ .ds_cnt_inl = ds_cnt_inl,
+ .num_wqebbs = DIV_ROUND_UP(ds_cnt, MLX5_SEND_WQEBB_NUM_DS),
+ };
+}
+
void mlx5i_sq_xmit(struct mlx5e_txqsq *sq, struct sk_buff *skb,
struct mlx5_av *av, u32 dqpn, u32 dqkey, bool xmit_more)
{
+ struct mlx5e_tx_wqe_attr wqe_attr;
+ struct mlx5e_tx_attr attr;
struct mlx5i_tx_wqe *wqe;
struct mlx5_wqe_datagram_seg *datagram;
@@ -588,47 +659,17 @@ void mlx5i_sq_xmit(struct mlx5e_txqsq *sq, struct sk_buff *skb,
struct mlx5e_tx_wqe_info *wi;
struct mlx5e_sq_stats *stats = sq->stats;
- u16 ds_cnt, ds_cnt_inl = 0;
- u8 num_wqebbs, opcode;
- u16 headlen, ihs, pi;
- u32 num_bytes;
int num_dma;
- __be16 mss;
+ u16 pi;
- /* 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_tx_wqe_inline_mode(sq, NULL, skb);
+ mlx5e_sq_xmit_prepare(sq, skb, NULL, &attr);
+ mlx5i_sq_calc_wqe_attr(skb, &attr, &wqe_attr);
- 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++;
- }
+ pi = mlx5e_txqsq_get_next_pi(sq, wqe_attr.num_wqebbs);
+ wqe = MLX5I_SQ_FETCH_WQE(sq, pi);
- 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 = mlx5e_txqsq_get_next_pi(sq, num_wqebbs);
- wqe = MLX5I_SQ_FETCH_WQE(sq, pi);
-
/* fill wqe */
wi = &sq->db.wqe_info[pi];
cseg = &wqe->ctrl;
@@ -640,20 +681,20 @@ void mlx5i_sq_xmit(struct mlx5e_txqsq *sq, struct sk_buff *skb,
mlx5e_txwqe_build_eseg_csum(sq, skb, eseg);
- eseg->mss = mss;
+ eseg->mss = attr.mss;
- if (ihs) {
- memcpy(eseg->inline_hdr.start, skb->data, ihs);
- eseg->inline_hdr.sz = cpu_to_be16(ihs);
- dseg += ds_cnt_inl;
+ if (attr.ihs) {
+ memcpy(eseg->inline_hdr.start, skb->data, attr.ihs);
+ eseg->inline_hdr.sz = cpu_to_be16(attr.ihs);
+ dseg += wqe_attr.ds_cnt_inl;
}
- num_dma = mlx5e_txwqe_build_dsegs(sq, skb, skb->data + ihs, headlen, dseg);
+ num_dma = mlx5e_txwqe_build_dsegs(sq, skb, skb->data + attr.ihs,
+ attr.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);
+ mlx5e_txwqe_complete(sq, skb, &attr, &wqe_attr, num_dma, wi, cseg, xmit_more);
return;
--
2.26.2
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