From: Michael Baum <michaelba@nvidia.com>
To: dev@dpdk.org
Cc: Matan Azrad <matan@nvidia.com>,
Raslan Darawsheh <rasland@nvidia.com>,
Viacheslav Ovsiienko <viacheslavo@nvidia.com>
Subject: [dpdk-dev] [PATCH v2 4/6] net/mlx5: separate Tx burst template to header file
Date: Mon, 12 Apr 2021 06:32:23 +0000 [thread overview]
Message-ID: <1618209145-3055-5-git-send-email-michaelba@nvidia.com> (raw)
In-Reply-To: <1618209145-3055-1-git-send-email-michaelba@nvidia.com>
This patch moves Tx burst and its inline functions declarations to
header file to allow its use from several separate source files and as a
possible preparation for Tx cleanup.
Signed-off-by: Michael Baum <michaelba@nvidia.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>
---
drivers/net/mlx5/mlx5_rxtx.c | 3331 +-----------------------------------------
drivers/net/mlx5/mlx5_tx.h | 3304 +++++++++++++++++++++++++++++++++++++++++
2 files changed, 3305 insertions(+), 3330 deletions(-)
diff --git a/drivers/net/mlx5/mlx5_rxtx.c b/drivers/net/mlx5/mlx5_rxtx.c
index 57ff407..2f36754 100644
--- a/drivers/net/mlx5/mlx5_rxtx.c
+++ b/drivers/net/mlx5/mlx5_rxtx.c
@@ -28,57 +28,6 @@
#include "mlx5_rx.h"
#include "mlx5_tx.h"
-/* TX burst subroutines return codes. */
-enum mlx5_txcmp_code {
- MLX5_TXCMP_CODE_EXIT = 0,
- MLX5_TXCMP_CODE_ERROR,
- MLX5_TXCMP_CODE_SINGLE,
- MLX5_TXCMP_CODE_MULTI,
- MLX5_TXCMP_CODE_TSO,
- MLX5_TXCMP_CODE_EMPW,
-};
-
-/*
- * These defines are used to configure Tx burst routine option set
- * supported at compile time. The not specified options are optimized out
- * out due to if conditions can be explicitly calculated at compile time.
- * The offloads with bigger runtime check (require more CPU cycles to
- * skip) overhead should have the bigger index - this is needed to
- * select the better matching routine function if no exact match and
- * some offloads are not actually requested.
- */
-#define MLX5_TXOFF_CONFIG_MULTI (1u << 0) /* Multi-segment packets.*/
-#define MLX5_TXOFF_CONFIG_TSO (1u << 1) /* TCP send offload supported.*/
-#define MLX5_TXOFF_CONFIG_SWP (1u << 2) /* Tunnels/SW Parser offloads.*/
-#define MLX5_TXOFF_CONFIG_CSUM (1u << 3) /* Check Sums offloaded. */
-#define MLX5_TXOFF_CONFIG_INLINE (1u << 4) /* Data inlining supported. */
-#define MLX5_TXOFF_CONFIG_VLAN (1u << 5) /* VLAN insertion supported.*/
-#define MLX5_TXOFF_CONFIG_METADATA (1u << 6) /* Flow metadata. */
-#define MLX5_TXOFF_CONFIG_EMPW (1u << 8) /* Enhanced MPW supported.*/
-#define MLX5_TXOFF_CONFIG_MPW (1u << 9) /* Legacy MPW supported.*/
-#define MLX5_TXOFF_CONFIG_TXPP (1u << 10) /* Scheduling on timestamp.*/
-
-/* The most common offloads groups. */
-#define MLX5_TXOFF_CONFIG_NONE 0
-#define MLX5_TXOFF_CONFIG_FULL (MLX5_TXOFF_CONFIG_MULTI | \
- MLX5_TXOFF_CONFIG_TSO | \
- MLX5_TXOFF_CONFIG_SWP | \
- MLX5_TXOFF_CONFIG_CSUM | \
- MLX5_TXOFF_CONFIG_INLINE | \
- MLX5_TXOFF_CONFIG_VLAN | \
- MLX5_TXOFF_CONFIG_METADATA)
-
-#define MLX5_TXOFF_CONFIG(mask) (olx & MLX5_TXOFF_CONFIG_##mask)
-
-#define MLX5_TXOFF_DECL(func, olx) \
-static uint16_t mlx5_tx_burst_##func(void *txq, \
- struct rte_mbuf **pkts, \
- uint16_t pkts_n) \
-{ \
- return mlx5_tx_burst_tmpl((struct mlx5_txq_data *)txq, \
- pkts, pkts_n, (olx)); \
-}
-
#define MLX5_TXOFF_INFO(func, olx) {mlx5_tx_burst_##func, olx},
/* static asserts */
@@ -139,7 +88,6 @@ enum mlx5_txcmp_code {
uint8_t mlx5_swp_types_table[1 << 10] __rte_cache_aligned;
uint64_t rte_net_mlx5_dynf_inline_mask;
-#define PKT_TX_DYNF_NOINLINE rte_net_mlx5_dynf_inline_mask
/**
* Build a table to translate Rx completion flags to packet type.
@@ -366,109 +314,6 @@ enum mlx5_txcmp_code {
}
}
-/**
- * Set Software Parser flags and offsets in Ethernet Segment of WQE.
- * Flags must be preliminary initialized to zero.
- *
- * @param loc
- * Pointer to burst routine local context.
- * @param swp_flags
- * Pointer to store Software Parser flags
- * @param olx
- * Configured Tx offloads mask. It is fully defined at
- * compile time and may be used for optimization.
- *
- * @return
- * Software Parser offsets packed in dword.
- * Software Parser flags are set by pointer.
- */
-static __rte_always_inline uint32_t
-txq_mbuf_to_swp(struct mlx5_txq_local *__rte_restrict loc,
- uint8_t *swp_flags,
- unsigned int olx)
-{
- uint64_t ol, tunnel;
- unsigned int idx, off;
- uint32_t set;
-
- if (!MLX5_TXOFF_CONFIG(SWP))
- return 0;
- ol = loc->mbuf->ol_flags;
- tunnel = ol & PKT_TX_TUNNEL_MASK;
- /*
- * Check whether Software Parser is required.
- * Only customized tunnels may ask for.
- */
- if (likely(tunnel != PKT_TX_TUNNEL_UDP && tunnel != PKT_TX_TUNNEL_IP))
- return 0;
- /*
- * The index should have:
- * bit[0:1] = PKT_TX_L4_MASK
- * bit[4] = PKT_TX_IPV6
- * bit[8] = PKT_TX_OUTER_IPV6
- * bit[9] = PKT_TX_OUTER_UDP
- */
- idx = (ol & (PKT_TX_L4_MASK | PKT_TX_IPV6 | PKT_TX_OUTER_IPV6)) >> 52;
- idx |= (tunnel == PKT_TX_TUNNEL_UDP) ? (1 << 9) : 0;
- *swp_flags = mlx5_swp_types_table[idx];
- /*
- * Set offsets for SW parser. Since ConnectX-5, SW parser just
- * complements HW parser. SW parser starts to engage only if HW parser
- * can't reach a header. For the older devices, HW parser will not kick
- * in if any of SWP offsets is set. Therefore, all of the L3 offsets
- * should be set regardless of HW offload.
- */
- off = loc->mbuf->outer_l2_len;
- if (MLX5_TXOFF_CONFIG(VLAN) && ol & PKT_TX_VLAN_PKT)
- off += sizeof(struct rte_vlan_hdr);
- set = (off >> 1) << 8; /* Outer L3 offset. */
- off += loc->mbuf->outer_l3_len;
- if (tunnel == PKT_TX_TUNNEL_UDP)
- set |= off >> 1; /* Outer L4 offset. */
- if (ol & (PKT_TX_IPV4 | PKT_TX_IPV6)) { /* Inner IP. */
- const uint64_t csum = ol & PKT_TX_L4_MASK;
- off += loc->mbuf->l2_len;
- set |= (off >> 1) << 24; /* Inner L3 offset. */
- if (csum == PKT_TX_TCP_CKSUM ||
- csum == PKT_TX_UDP_CKSUM ||
- (MLX5_TXOFF_CONFIG(TSO) && ol & PKT_TX_TCP_SEG)) {
- off += loc->mbuf->l3_len;
- set |= (off >> 1) << 16; /* Inner L4 offset. */
- }
- }
- set = rte_cpu_to_le_32(set);
- return set;
-}
-
-/**
- * Convert the Checksum offloads to Verbs.
- *
- * @param buf
- * Pointer to the mbuf.
- *
- * @return
- * Converted checksum flags.
- */
-static __rte_always_inline uint8_t
-txq_ol_cksum_to_cs(struct rte_mbuf *buf)
-{
- uint32_t idx;
- uint8_t is_tunnel = !!(buf->ol_flags & PKT_TX_TUNNEL_MASK);
- const uint64_t ol_flags_mask = PKT_TX_TCP_SEG | PKT_TX_L4_MASK |
- PKT_TX_IP_CKSUM | PKT_TX_OUTER_IP_CKSUM;
-
- /*
- * The index should have:
- * bit[0] = PKT_TX_TCP_SEG
- * bit[2:3] = PKT_TX_UDP_CKSUM, PKT_TX_TCP_CKSUM
- * bit[4] = PKT_TX_IP_CKSUM
- * bit[8] = PKT_TX_OUTER_IP_CKSUM
- * bit[9] = tunnel
- */
- idx = ((buf->ol_flags & ol_flags_mask) >> 50) | (!!is_tunnel << 9);
- return mlx5_cksum_table[idx];
-}
-
#define MLX5_SYSTEM_LOG_DIR "/var/log"
/**
* Dump debug information to log file.
@@ -720,214 +565,6 @@ enum mlx5_txcmp_code {
}
/**
- * Free the mbufs from the linear array of pointers.
- *
- * @param txq
- * Pointer to Tx queue structure.
- * @param pkts
- * Pointer to array of packets to be free.
- * @param pkts_n
- * Number of packets to be freed.
- * @param olx
- * Configured Tx offloads mask. It is fully defined at
- * compile time and may be used for optimization.
- */
-static __rte_always_inline void
-mlx5_tx_free_mbuf(struct mlx5_txq_data *__rte_restrict txq,
- struct rte_mbuf **__rte_restrict pkts,
- unsigned int pkts_n,
- unsigned int olx __rte_unused)
-{
- struct rte_mempool *pool = NULL;
- struct rte_mbuf **p_free = NULL;
- struct rte_mbuf *mbuf;
- unsigned int n_free = 0;
-
- /*
- * The implemented algorithm eliminates
- * copying pointers to temporary array
- * for rte_mempool_put_bulk() calls.
- */
- MLX5_ASSERT(pkts);
- MLX5_ASSERT(pkts_n);
- /*
- * Free mbufs directly to the pool in bulk
- * if fast free offload is engaged
- */
- if (!MLX5_TXOFF_CONFIG(MULTI) && txq->fast_free) {
- mbuf = *pkts;
- pool = mbuf->pool;
- rte_mempool_put_bulk(pool, (void *)pkts, pkts_n);
- return;
- }
- for (;;) {
- for (;;) {
- /*
- * Decrement mbuf reference counter, detach
- * indirect and external buffers if needed.
- */
- mbuf = rte_pktmbuf_prefree_seg(*pkts);
- if (likely(mbuf != NULL)) {
- MLX5_ASSERT(mbuf == *pkts);
- if (likely(n_free != 0)) {
- if (unlikely(pool != mbuf->pool))
- /* From different pool. */
- break;
- } else {
- /* Start new scan array. */
- pool = mbuf->pool;
- p_free = pkts;
- }
- ++n_free;
- ++pkts;
- --pkts_n;
- if (unlikely(pkts_n == 0)) {
- mbuf = NULL;
- break;
- }
- } else {
- /*
- * This happens if mbuf is still referenced.
- * We can't put it back to the pool, skip.
- */
- ++pkts;
- --pkts_n;
- if (unlikely(n_free != 0))
- /* There is some array to free.*/
- break;
- if (unlikely(pkts_n == 0))
- /* Last mbuf, nothing to free. */
- return;
- }
- }
- for (;;) {
- /*
- * This loop is implemented to avoid multiple
- * inlining of rte_mempool_put_bulk().
- */
- MLX5_ASSERT(pool);
- MLX5_ASSERT(p_free);
- MLX5_ASSERT(n_free);
- /*
- * Free the array of pre-freed mbufs
- * belonging to the same memory pool.
- */
- rte_mempool_put_bulk(pool, (void *)p_free, n_free);
- if (unlikely(mbuf != NULL)) {
- /* There is the request to start new scan. */
- pool = mbuf->pool;
- p_free = pkts++;
- n_free = 1;
- --pkts_n;
- if (likely(pkts_n != 0))
- break;
- /*
- * This is the last mbuf to be freed.
- * Do one more loop iteration to complete.
- * This is rare case of the last unique mbuf.
- */
- mbuf = NULL;
- continue;
- }
- if (likely(pkts_n == 0))
- return;
- n_free = 0;
- break;
- }
- }
-}
-/*
- * No inline version to free buffers for optimal call
- * on the tx_burst completion.
- */
-static __rte_noinline void
-__mlx5_tx_free_mbuf(struct mlx5_txq_data *__rte_restrict txq,
- struct rte_mbuf **__rte_restrict pkts,
- unsigned int pkts_n,
- unsigned int olx __rte_unused)
-{
- mlx5_tx_free_mbuf(txq, pkts, pkts_n, olx);
-}
-
-/**
- * Free the mbuf from the elts ring buffer till new tail.
- *
- * @param txq
- * Pointer to Tx queue structure.
- * @param tail
- * Index in elts to free up to, becomes new elts tail.
- * @param olx
- * Configured Tx offloads mask. It is fully defined at
- * compile time and may be used for optimization.
- */
-static __rte_always_inline void
-mlx5_tx_free_elts(struct mlx5_txq_data *__rte_restrict txq,
- uint16_t tail,
- unsigned int olx __rte_unused)
-{
- uint16_t n_elts = tail - txq->elts_tail;
-
- MLX5_ASSERT(n_elts);
- MLX5_ASSERT(n_elts <= txq->elts_s);
- /*
- * Implement a loop to support ring buffer wraparound
- * with single inlining of mlx5_tx_free_mbuf().
- */
- do {
- unsigned int part;
-
- part = txq->elts_s - (txq->elts_tail & txq->elts_m);
- part = RTE_MIN(part, n_elts);
- MLX5_ASSERT(part);
- MLX5_ASSERT(part <= txq->elts_s);
- mlx5_tx_free_mbuf(txq,
- &txq->elts[txq->elts_tail & txq->elts_m],
- part, olx);
- txq->elts_tail += part;
- n_elts -= part;
- } while (n_elts);
-}
-
-/**
- * Store the mbuf being sent into elts ring buffer.
- * On Tx completion these mbufs will be freed.
- *
- * @param txq
- * Pointer to Tx queue structure.
- * @param pkts
- * Pointer to array of packets to be stored.
- * @param pkts_n
- * Number of packets to be stored.
- * @param olx
- * Configured Tx offloads mask. It is fully defined at
- * compile time and may be used for optimization.
- */
-static __rte_always_inline void
-mlx5_tx_copy_elts(struct mlx5_txq_data *__rte_restrict txq,
- struct rte_mbuf **__rte_restrict pkts,
- unsigned int pkts_n,
- unsigned int olx __rte_unused)
-{
- unsigned int part;
- struct rte_mbuf **elts = (struct rte_mbuf **)txq->elts;
-
- MLX5_ASSERT(pkts);
- MLX5_ASSERT(pkts_n);
- part = txq->elts_s - (txq->elts_head & txq->elts_m);
- MLX5_ASSERT(part);
- MLX5_ASSERT(part <= txq->elts_s);
- /* This code is a good candidate for vectorizing with SIMD. */
- rte_memcpy((void *)(elts + (txq->elts_head & txq->elts_m)),
- (void *)pkts,
- RTE_MIN(part, pkts_n) * sizeof(struct rte_mbuf *));
- txq->elts_head += pkts_n;
- if (unlikely(part < pkts_n))
- /* The copy is wrapping around the elts array. */
- rte_memcpy((void *)elts, (void *)(pkts + part),
- (pkts_n - part) * sizeof(struct rte_mbuf *));
-}
-
-/**
* Update completion queue consuming index via doorbell
* and flush the completed data buffers.
*
@@ -970,7 +607,7 @@ enum mlx5_txcmp_code {
* NOTE: not inlined intentionally, it makes tx_burst
* routine smaller, simple and faster - from experiments.
*/
-static void
+void
mlx5_tx_handle_completion(struct mlx5_txq_data *__rte_restrict txq,
unsigned int olx __rte_unused)
{
@@ -1047,54 +684,6 @@ enum mlx5_txcmp_code {
}
/**
- * Check if the completion request flag should be set in the last WQE.
- * Both pushed mbufs and WQEs are monitored and the completion request
- * flag is set if any of thresholds is reached.
- *
- * @param txq
- * Pointer to TX queue structure.
- * @param loc
- * Pointer to burst routine local context.
- * @param olx
- * Configured Tx offloads mask. It is fully defined at
- * compile time and may be used for optimization.
- */
-static __rte_always_inline void
-mlx5_tx_request_completion(struct mlx5_txq_data *__rte_restrict txq,
- struct mlx5_txq_local *__rte_restrict loc,
- unsigned int olx)
-{
- uint16_t head = txq->elts_head;
- unsigned int part;
-
- part = MLX5_TXOFF_CONFIG(INLINE) ?
- 0 : loc->pkts_sent - loc->pkts_copy;
- head += part;
- if ((uint16_t)(head - txq->elts_comp) >= MLX5_TX_COMP_THRESH ||
- (MLX5_TXOFF_CONFIG(INLINE) &&
- (uint16_t)(txq->wqe_ci - txq->wqe_comp) >= txq->wqe_thres)) {
- volatile struct mlx5_wqe *last = loc->wqe_last;
-
- MLX5_ASSERT(last);
- txq->elts_comp = head;
- if (MLX5_TXOFF_CONFIG(INLINE))
- txq->wqe_comp = txq->wqe_ci;
- /* Request unconditional completion on last WQE. */
- last->cseg.flags = RTE_BE32(MLX5_COMP_ALWAYS <<
- MLX5_COMP_MODE_OFFSET);
- /* Save elts_head in dedicated free on completion queue. */
-#ifdef RTE_LIBRTE_MLX5_DEBUG
- txq->fcqs[txq->cq_pi++ & txq->cqe_m] = head |
- (last->cseg.opcode >> 8) << 16;
-#else
- txq->fcqs[txq->cq_pi++ & txq->cqe_m] = head;
-#endif
- /* A CQE slot must always be available. */
- MLX5_ASSERT((txq->cq_pi - txq->cq_ci) <= txq->cqe_s);
- }
-}
-
-/**
* DPDK callback to check the status of a tx descriptor.
*
* @param tx_queue
@@ -1118,2924 +707,6 @@ enum mlx5_txcmp_code {
return RTE_ETH_TX_DESC_DONE;
}
-/**
- * Build the Control Segment with specified opcode:
- * - MLX5_OPCODE_SEND
- * - MLX5_OPCODE_ENHANCED_MPSW
- * - MLX5_OPCODE_TSO
- *
- * @param txq
- * Pointer to TX queue structure.
- * @param loc
- * Pointer to burst routine local context.
- * @param wqe
- * Pointer to WQE to fill with built Control Segment.
- * @param ds
- * Supposed length of WQE in segments.
- * @param opcode
- * SQ WQE opcode to put into Control Segment.
- * @param olx
- * Configured Tx offloads mask. It is fully defined at
- * compile time and may be used for optimization.
- */
-static __rte_always_inline void
-mlx5_tx_cseg_init(struct mlx5_txq_data *__rte_restrict txq,
- struct mlx5_txq_local *__rte_restrict loc __rte_unused,
- struct mlx5_wqe *__rte_restrict wqe,
- unsigned int ds,
- unsigned int opcode,
- unsigned int olx __rte_unused)
-{
- struct mlx5_wqe_cseg *__rte_restrict cs = &wqe->cseg;
-
- /* For legacy MPW replace the EMPW by TSO with modifier. */
- if (MLX5_TXOFF_CONFIG(MPW) && opcode == MLX5_OPCODE_ENHANCED_MPSW)
- opcode = MLX5_OPCODE_TSO | MLX5_OPC_MOD_MPW << 24;
- cs->opcode = rte_cpu_to_be_32((txq->wqe_ci << 8) | opcode);
- cs->sq_ds = rte_cpu_to_be_32(txq->qp_num_8s | ds);
- cs->flags = RTE_BE32(MLX5_COMP_ONLY_FIRST_ERR <<
- MLX5_COMP_MODE_OFFSET);
- cs->misc = RTE_BE32(0);
-}
-
-/**
- * Build the Synchronize Queue Segment with specified completion index.
- *
- * @param txq
- * Pointer to TX queue structure.
- * @param loc
- * Pointer to burst routine local context.
- * @param wqe
- * Pointer to WQE to fill with built Control Segment.
- * @param wci
- * Completion index in Clock Queue to wait.
- * @param olx
- * Configured Tx offloads mask. It is fully defined at
- * compile time and may be used for optimization.
- */
-static __rte_always_inline void
-mlx5_tx_wseg_init(struct mlx5_txq_data *restrict txq,
- struct mlx5_txq_local *restrict loc __rte_unused,
- struct mlx5_wqe *restrict wqe,
- unsigned int wci,
- unsigned int olx __rte_unused)
-{
- struct mlx5_wqe_qseg *qs;
-
- qs = RTE_PTR_ADD(wqe, MLX5_WSEG_SIZE);
- qs->max_index = rte_cpu_to_be_32(wci);
- qs->qpn_cqn = rte_cpu_to_be_32(txq->sh->txpp.clock_queue.cq_obj.cq->id);
- qs->reserved0 = RTE_BE32(0);
- qs->reserved1 = RTE_BE32(0);
-}
-
-/**
- * Build the Ethernet Segment without inlined data.
- * Supports Software Parser, Checksums and VLAN
- * insertion Tx offload features.
- *
- * @param txq
- * Pointer to TX queue structure.
- * @param loc
- * Pointer to burst routine local context.
- * @param wqe
- * Pointer to WQE to fill with built Ethernet Segment.
- * @param olx
- * Configured Tx offloads mask. It is fully defined at
- * compile time and may be used for optimization.
- */
-static __rte_always_inline void
-mlx5_tx_eseg_none(struct mlx5_txq_data *__rte_restrict txq __rte_unused,
- struct mlx5_txq_local *__rte_restrict loc,
- struct mlx5_wqe *__rte_restrict wqe,
- unsigned int olx)
-{
- struct mlx5_wqe_eseg *__rte_restrict es = &wqe->eseg;
- uint32_t csum;
-
- /*
- * Calculate and set check sum flags first, dword field
- * in segment may be shared with Software Parser flags.
- */
- csum = MLX5_TXOFF_CONFIG(CSUM) ? txq_ol_cksum_to_cs(loc->mbuf) : 0;
- es->flags = rte_cpu_to_le_32(csum);
- /*
- * Calculate and set Software Parser offsets and flags.
- * These flags a set for custom UDP and IP tunnel packets.
- */
- es->swp_offs = txq_mbuf_to_swp(loc, &es->swp_flags, olx);
- /* Fill metadata field if needed. */
- es->metadata = MLX5_TXOFF_CONFIG(METADATA) ?
- loc->mbuf->ol_flags & PKT_TX_DYNF_METADATA ?
- *RTE_FLOW_DYNF_METADATA(loc->mbuf) : 0 : 0;
- /* Engage VLAN tag insertion feature if requested. */
- if (MLX5_TXOFF_CONFIG(VLAN) &&
- loc->mbuf->ol_flags & PKT_TX_VLAN_PKT) {
- /*
- * We should get here only if device support
- * this feature correctly.
- */
- MLX5_ASSERT(txq->vlan_en);
- es->inline_hdr = rte_cpu_to_be_32(MLX5_ETH_WQE_VLAN_INSERT |
- loc->mbuf->vlan_tci);
- } else {
- es->inline_hdr = RTE_BE32(0);
- }
-}
-
-/**
- * Build the Ethernet Segment with minimal inlined data
- * of MLX5_ESEG_MIN_INLINE_SIZE bytes length. This is
- * used to fill the gap in single WQEBB WQEs.
- * Supports Software Parser, Checksums and VLAN
- * insertion Tx offload features.
- *
- * @param txq
- * Pointer to TX queue structure.
- * @param loc
- * Pointer to burst routine local context.
- * @param wqe
- * Pointer to WQE to fill with built Ethernet Segment.
- * @param vlan
- * Length of VLAN tag insertion if any.
- * @param olx
- * Configured Tx offloads mask. It is fully defined at
- * compile time and may be used for optimization.
- */
-static __rte_always_inline void
-mlx5_tx_eseg_dmin(struct mlx5_txq_data *__rte_restrict txq __rte_unused,
- struct mlx5_txq_local *__rte_restrict loc,
- struct mlx5_wqe *__rte_restrict wqe,
- unsigned int vlan,
- unsigned int olx)
-{
- struct mlx5_wqe_eseg *__rte_restrict es = &wqe->eseg;
- uint32_t csum;
- uint8_t *psrc, *pdst;
-
- /*
- * Calculate and set check sum flags first, dword field
- * in segment may be shared with Software Parser flags.
- */
- csum = MLX5_TXOFF_CONFIG(CSUM) ? txq_ol_cksum_to_cs(loc->mbuf) : 0;
- es->flags = rte_cpu_to_le_32(csum);
- /*
- * Calculate and set Software Parser offsets and flags.
- * These flags a set for custom UDP and IP tunnel packets.
- */
- es->swp_offs = txq_mbuf_to_swp(loc, &es->swp_flags, olx);
- /* Fill metadata field if needed. */
- es->metadata = MLX5_TXOFF_CONFIG(METADATA) ?
- loc->mbuf->ol_flags & PKT_TX_DYNF_METADATA ?
- *RTE_FLOW_DYNF_METADATA(loc->mbuf) : 0 : 0;
- psrc = rte_pktmbuf_mtod(loc->mbuf, uint8_t *);
- es->inline_hdr_sz = RTE_BE16(MLX5_ESEG_MIN_INLINE_SIZE);
- es->inline_data = *(unaligned_uint16_t *)psrc;
- psrc += sizeof(uint16_t);
- pdst = (uint8_t *)(es + 1);
- if (MLX5_TXOFF_CONFIG(VLAN) && vlan) {
- /* Implement VLAN tag insertion as part inline data. */
- memcpy(pdst, psrc, 2 * RTE_ETHER_ADDR_LEN - sizeof(uint16_t));
- pdst += 2 * RTE_ETHER_ADDR_LEN - sizeof(uint16_t);
- psrc += 2 * RTE_ETHER_ADDR_LEN - sizeof(uint16_t);
- /* Insert VLAN ethertype + VLAN tag. */
- *(unaligned_uint32_t *)pdst = rte_cpu_to_be_32
- ((RTE_ETHER_TYPE_VLAN << 16) |
- loc->mbuf->vlan_tci);
- pdst += sizeof(struct rte_vlan_hdr);
- /* Copy the rest two bytes from packet data. */
- MLX5_ASSERT(pdst == RTE_PTR_ALIGN(pdst, sizeof(uint16_t)));
- *(uint16_t *)pdst = *(unaligned_uint16_t *)psrc;
- } else {
- /* Fill the gap in the title WQEBB with inline data. */
- rte_mov16(pdst, psrc);
- }
-}
-
-/**
- * Build the Ethernet Segment with entire packet
- * data inlining. Checks the boundary of WQEBB and
- * ring buffer wrapping, supports Software Parser,
- * Checksums and VLAN insertion Tx offload features.
- *
- * @param txq
- * Pointer to TX queue structure.
- * @param loc
- * Pointer to burst routine local context.
- * @param wqe
- * Pointer to WQE to fill with built Ethernet Segment.
- * @param vlan
- * Length of VLAN tag insertion if any.
- * @param inlen
- * Length of data to inline (VLAN included, if any).
- * @param tso
- * TSO flag, set mss field from the packet.
- * @param olx
- * Configured Tx offloads mask. It is fully defined at
- * compile time and may be used for optimization.
- *
- * @return
- * Pointer to the next Data Segment (aligned and wrapped around).
- */
-static __rte_always_inline struct mlx5_wqe_dseg *
-mlx5_tx_eseg_data(struct mlx5_txq_data *__rte_restrict txq,
- struct mlx5_txq_local *__rte_restrict loc,
- struct mlx5_wqe *__rte_restrict wqe,
- unsigned int vlan,
- unsigned int inlen,
- unsigned int tso,
- unsigned int olx)
-{
- struct mlx5_wqe_eseg *__rte_restrict es = &wqe->eseg;
- uint32_t csum;
- uint8_t *psrc, *pdst;
- unsigned int part;
-
- /*
- * Calculate and set check sum flags first, dword field
- * in segment may be shared with Software Parser flags.
- */
- csum = MLX5_TXOFF_CONFIG(CSUM) ? txq_ol_cksum_to_cs(loc->mbuf) : 0;
- if (tso) {
- csum <<= 24;
- csum |= loc->mbuf->tso_segsz;
- es->flags = rte_cpu_to_be_32(csum);
- } else {
- es->flags = rte_cpu_to_le_32(csum);
- }
- /*
- * Calculate and set Software Parser offsets and flags.
- * These flags a set for custom UDP and IP tunnel packets.
- */
- es->swp_offs = txq_mbuf_to_swp(loc, &es->swp_flags, olx);
- /* Fill metadata field if needed. */
- es->metadata = MLX5_TXOFF_CONFIG(METADATA) ?
- loc->mbuf->ol_flags & PKT_TX_DYNF_METADATA ?
- *RTE_FLOW_DYNF_METADATA(loc->mbuf) : 0 : 0;
- psrc = rte_pktmbuf_mtod(loc->mbuf, uint8_t *);
- es->inline_hdr_sz = rte_cpu_to_be_16(inlen);
- es->inline_data = *(unaligned_uint16_t *)psrc;
- psrc += sizeof(uint16_t);
- pdst = (uint8_t *)(es + 1);
- if (MLX5_TXOFF_CONFIG(VLAN) && vlan) {
- /* Implement VLAN tag insertion as part inline data. */
- memcpy(pdst, psrc, 2 * RTE_ETHER_ADDR_LEN - sizeof(uint16_t));
- pdst += 2 * RTE_ETHER_ADDR_LEN - sizeof(uint16_t);
- psrc += 2 * RTE_ETHER_ADDR_LEN - sizeof(uint16_t);
- /* Insert VLAN ethertype + VLAN tag. */
- *(unaligned_uint32_t *)pdst = rte_cpu_to_be_32
- ((RTE_ETHER_TYPE_VLAN << 16) |
- loc->mbuf->vlan_tci);
- pdst += sizeof(struct rte_vlan_hdr);
- /* Copy the rest two bytes from packet data. */
- MLX5_ASSERT(pdst == RTE_PTR_ALIGN(pdst, sizeof(uint16_t)));
- *(uint16_t *)pdst = *(unaligned_uint16_t *)psrc;
- psrc += sizeof(uint16_t);
- } else {
- /* Fill the gap in the title WQEBB with inline data. */
- rte_mov16(pdst, psrc);
- psrc += sizeof(rte_v128u32_t);
- }
- pdst = (uint8_t *)(es + 2);
- MLX5_ASSERT(inlen >= MLX5_ESEG_MIN_INLINE_SIZE);
- MLX5_ASSERT(pdst < (uint8_t *)txq->wqes_end);
- inlen -= MLX5_ESEG_MIN_INLINE_SIZE;
- if (!inlen) {
- MLX5_ASSERT(pdst == RTE_PTR_ALIGN(pdst, MLX5_WSEG_SIZE));
- return (struct mlx5_wqe_dseg *)pdst;
- }
- /*
- * The WQEBB space availability is checked by caller.
- * Here we should be aware of WQE ring buffer wraparound only.
- */
- part = (uint8_t *)txq->wqes_end - pdst;
- part = RTE_MIN(part, inlen);
- do {
- rte_memcpy(pdst, psrc, part);
- inlen -= part;
- if (likely(!inlen)) {
- /*
- * If return value is not used by the caller
- * the code below will be optimized out.
- */
- pdst += part;
- pdst = RTE_PTR_ALIGN(pdst, MLX5_WSEG_SIZE);
- if (unlikely(pdst >= (uint8_t *)txq->wqes_end))
- pdst = (uint8_t *)txq->wqes;
- return (struct mlx5_wqe_dseg *)pdst;
- }
- pdst = (uint8_t *)txq->wqes;
- psrc += part;
- part = inlen;
- } while (true);
-}
-
-/**
- * Copy data from chain of mbuf to the specified linear buffer.
- * Checksums and VLAN insertion Tx offload features. If data
- * from some mbuf copied completely this mbuf is freed. Local
- * structure is used to keep the byte stream state.
- *
- * @param pdst
- * Pointer to the destination linear buffer.
- * @param loc
- * Pointer to burst routine local context.
- * @param len
- * Length of data to be copied.
- * @param must
- * Length of data to be copied ignoring no inline hint.
- * @param olx
- * Configured Tx offloads mask. It is fully defined at
- * compile time and may be used for optimization.
- *
- * @return
- * Number of actual copied data bytes. This is always greater than or
- * equal to must parameter and might be lesser than len in no inline
- * hint flag is encountered.
- */
-static __rte_always_inline unsigned int
-mlx5_tx_mseg_memcpy(uint8_t *pdst,
- struct mlx5_txq_local *__rte_restrict loc,
- unsigned int len,
- unsigned int must,
- unsigned int olx __rte_unused)
-{
- struct rte_mbuf *mbuf;
- unsigned int part, dlen, copy = 0;
- uint8_t *psrc;
-
- MLX5_ASSERT(len);
- MLX5_ASSERT(must <= len);
- do {
- /* Allow zero length packets, must check first. */
- dlen = rte_pktmbuf_data_len(loc->mbuf);
- if (dlen <= loc->mbuf_off) {
- /* Exhausted packet, just free. */
- mbuf = loc->mbuf;
- loc->mbuf = mbuf->next;
- rte_pktmbuf_free_seg(mbuf);
- loc->mbuf_off = 0;
- MLX5_ASSERT(loc->mbuf_nseg > 1);
- MLX5_ASSERT(loc->mbuf);
- --loc->mbuf_nseg;
- if (loc->mbuf->ol_flags & PKT_TX_DYNF_NOINLINE) {
- unsigned int diff;
-
- if (copy >= must) {
- /*
- * We already copied the minimal
- * requested amount of data.
- */
- return copy;
- }
- diff = must - copy;
- if (diff <= rte_pktmbuf_data_len(loc->mbuf)) {
- /*
- * Copy only the minimal required
- * part of the data buffer.
- */
- len = diff;
- }
- }
- continue;
- }
- dlen -= loc->mbuf_off;
- psrc = rte_pktmbuf_mtod_offset(loc->mbuf, uint8_t *,
- loc->mbuf_off);
- part = RTE_MIN(len, dlen);
- rte_memcpy(pdst, psrc, part);
- copy += part;
- loc->mbuf_off += part;
- len -= part;
- if (!len) {
- if (loc->mbuf_off >= rte_pktmbuf_data_len(loc->mbuf)) {
- loc->mbuf_off = 0;
- /* Exhausted packet, just free. */
- mbuf = loc->mbuf;
- loc->mbuf = mbuf->next;
- rte_pktmbuf_free_seg(mbuf);
- loc->mbuf_off = 0;
- MLX5_ASSERT(loc->mbuf_nseg >= 1);
- --loc->mbuf_nseg;
- }
- return copy;
- }
- pdst += part;
- } while (true);
-}
-
-/**
- * Build the Ethernet Segment with inlined data from
- * multi-segment packet. Checks the boundary of WQEBB
- * and ring buffer wrapping, supports Software Parser,
- * Checksums and VLAN insertion Tx offload features.
- *
- * @param txq
- * Pointer to TX queue structure.
- * @param loc
- * Pointer to burst routine local context.
- * @param wqe
- * Pointer to WQE to fill with built Ethernet Segment.
- * @param vlan
- * Length of VLAN tag insertion if any.
- * @param inlen
- * Length of data to inline (VLAN included, if any).
- * @param tso
- * TSO flag, set mss field from the packet.
- * @param olx
- * Configured Tx offloads mask. It is fully defined at
- * compile time and may be used for optimization.
- *
- * @return
- * Pointer to the next Data Segment (aligned and
- * possible NOT wrapped around - caller should do
- * wrapping check on its own).
- */
-static __rte_always_inline struct mlx5_wqe_dseg *
-mlx5_tx_eseg_mdat(struct mlx5_txq_data *__rte_restrict txq,
- struct mlx5_txq_local *__rte_restrict loc,
- struct mlx5_wqe *__rte_restrict wqe,
- unsigned int vlan,
- unsigned int inlen,
- unsigned int tso,
- unsigned int olx)
-{
- struct mlx5_wqe_eseg *__rte_restrict es = &wqe->eseg;
- uint32_t csum;
- uint8_t *pdst;
- unsigned int part, tlen = 0;
-
- /*
- * Calculate and set check sum flags first, uint32_t field
- * in segment may be shared with Software Parser flags.
- */
- csum = MLX5_TXOFF_CONFIG(CSUM) ? txq_ol_cksum_to_cs(loc->mbuf) : 0;
- if (tso) {
- csum <<= 24;
- csum |= loc->mbuf->tso_segsz;
- es->flags = rte_cpu_to_be_32(csum);
- } else {
- es->flags = rte_cpu_to_le_32(csum);
- }
- /*
- * Calculate and set Software Parser offsets and flags.
- * These flags a set for custom UDP and IP tunnel packets.
- */
- es->swp_offs = txq_mbuf_to_swp(loc, &es->swp_flags, olx);
- /* Fill metadata field if needed. */
- es->metadata = MLX5_TXOFF_CONFIG(METADATA) ?
- loc->mbuf->ol_flags & PKT_TX_DYNF_METADATA ?
- *RTE_FLOW_DYNF_METADATA(loc->mbuf) : 0 : 0;
- MLX5_ASSERT(inlen >= MLX5_ESEG_MIN_INLINE_SIZE);
- pdst = (uint8_t *)&es->inline_data;
- if (MLX5_TXOFF_CONFIG(VLAN) && vlan) {
- /* Implement VLAN tag insertion as part inline data. */
- mlx5_tx_mseg_memcpy(pdst, loc,
- 2 * RTE_ETHER_ADDR_LEN,
- 2 * RTE_ETHER_ADDR_LEN, olx);
- pdst += 2 * RTE_ETHER_ADDR_LEN;
- *(unaligned_uint32_t *)pdst = rte_cpu_to_be_32
- ((RTE_ETHER_TYPE_VLAN << 16) |
- loc->mbuf->vlan_tci);
- pdst += sizeof(struct rte_vlan_hdr);
- tlen += 2 * RTE_ETHER_ADDR_LEN + sizeof(struct rte_vlan_hdr);
- }
- MLX5_ASSERT(pdst < (uint8_t *)txq->wqes_end);
- /*
- * The WQEBB space availability is checked by caller.
- * Here we should be aware of WQE ring buffer wraparound only.
- */
- part = (uint8_t *)txq->wqes_end - pdst;
- part = RTE_MIN(part, inlen - tlen);
- MLX5_ASSERT(part);
- do {
- unsigned int copy;
-
- /*
- * Copying may be interrupted inside the routine
- * if run into no inline hint flag.
- */
- copy = tlen >= txq->inlen_mode ? 0 : (txq->inlen_mode - tlen);
- copy = mlx5_tx_mseg_memcpy(pdst, loc, part, copy, olx);
- tlen += copy;
- if (likely(inlen <= tlen) || copy < part) {
- es->inline_hdr_sz = rte_cpu_to_be_16(tlen);
- pdst += copy;
- pdst = RTE_PTR_ALIGN(pdst, MLX5_WSEG_SIZE);
- return (struct mlx5_wqe_dseg *)pdst;
- }
- pdst = (uint8_t *)txq->wqes;
- part = inlen - tlen;
- } while (true);
-}
-
-/**
- * Build the Data Segment of pointer type.
- *
- * @param txq
- * Pointer to TX queue structure.
- * @param loc
- * Pointer to burst routine local context.
- * @param dseg
- * Pointer to WQE to fill with built Data Segment.
- * @param buf
- * Data buffer to point.
- * @param len
- * Data buffer length.
- * @param olx
- * Configured Tx offloads mask. It is fully defined at
- * compile time and may be used for optimization.
- */
-static __rte_always_inline void
-mlx5_tx_dseg_ptr(struct mlx5_txq_data *__rte_restrict txq,
- struct mlx5_txq_local *__rte_restrict loc,
- struct mlx5_wqe_dseg *__rte_restrict dseg,
- uint8_t *buf,
- unsigned int len,
- unsigned int olx __rte_unused)
-
-{
- MLX5_ASSERT(len);
- dseg->bcount = rte_cpu_to_be_32(len);
- dseg->lkey = mlx5_tx_mb2mr(txq, loc->mbuf);
- dseg->pbuf = rte_cpu_to_be_64((uintptr_t)buf);
-}
-
-/**
- * Build the Data Segment of pointer type or inline
- * if data length is less than buffer in minimal
- * Data Segment size.
- *
- * @param txq
- * Pointer to TX queue structure.
- * @param loc
- * Pointer to burst routine local context.
- * @param dseg
- * Pointer to WQE to fill with built Data Segment.
- * @param buf
- * Data buffer to point.
- * @param len
- * Data buffer length.
- * @param olx
- * Configured Tx offloads mask. It is fully defined at
- * compile time and may be used for optimization.
- */
-static __rte_always_inline void
-mlx5_tx_dseg_iptr(struct mlx5_txq_data *__rte_restrict txq,
- struct mlx5_txq_local *__rte_restrict loc,
- struct mlx5_wqe_dseg *__rte_restrict dseg,
- uint8_t *buf,
- unsigned int len,
- unsigned int olx __rte_unused)
-
-{
- uintptr_t dst, src;
-
- MLX5_ASSERT(len);
- if (len > MLX5_DSEG_MIN_INLINE_SIZE) {
- dseg->bcount = rte_cpu_to_be_32(len);
- dseg->lkey = mlx5_tx_mb2mr(txq, loc->mbuf);
- dseg->pbuf = rte_cpu_to_be_64((uintptr_t)buf);
-
- return;
- }
- dseg->bcount = rte_cpu_to_be_32(len | MLX5_ETH_WQE_DATA_INLINE);
- /* Unrolled implementation of generic rte_memcpy. */
- dst = (uintptr_t)&dseg->inline_data[0];
- src = (uintptr_t)buf;
- if (len & 0x08) {
-#ifdef RTE_ARCH_STRICT_ALIGN
- MLX5_ASSERT(dst == RTE_PTR_ALIGN(dst, sizeof(uint32_t)));
- *(uint32_t *)dst = *(unaligned_uint32_t *)src;
- dst += sizeof(uint32_t);
- src += sizeof(uint32_t);
- *(uint32_t *)dst = *(unaligned_uint32_t *)src;
- dst += sizeof(uint32_t);
- src += sizeof(uint32_t);
-#else
- *(uint64_t *)dst = *(unaligned_uint64_t *)src;
- dst += sizeof(uint64_t);
- src += sizeof(uint64_t);
-#endif
- }
- if (len & 0x04) {
- *(uint32_t *)dst = *(unaligned_uint32_t *)src;
- dst += sizeof(uint32_t);
- src += sizeof(uint32_t);
- }
- if (len & 0x02) {
- *(uint16_t *)dst = *(unaligned_uint16_t *)src;
- dst += sizeof(uint16_t);
- src += sizeof(uint16_t);
- }
- if (len & 0x01)
- *(uint8_t *)dst = *(uint8_t *)src;
-}
-
-/**
- * Build the Data Segment of inlined data from single
- * segment packet, no VLAN insertion.
- *
- * @param txq
- * Pointer to TX queue structure.
- * @param loc
- * Pointer to burst routine local context.
- * @param dseg
- * Pointer to WQE to fill with built Data Segment.
- * @param buf
- * Data buffer to point.
- * @param len
- * Data buffer length.
- * @param olx
- * Configured Tx offloads mask. It is fully defined at
- * compile time and may be used for optimization.
- *
- * @return
- * Pointer to the next Data Segment after inlined data.
- * Ring buffer wraparound check is needed. We do not
- * do it here because it may not be needed for the
- * last packet in the eMPW session.
- */
-static __rte_always_inline struct mlx5_wqe_dseg *
-mlx5_tx_dseg_empw(struct mlx5_txq_data *__rte_restrict txq,
- struct mlx5_txq_local *__rte_restrict loc __rte_unused,
- struct mlx5_wqe_dseg *__rte_restrict dseg,
- uint8_t *buf,
- unsigned int len,
- unsigned int olx __rte_unused)
-{
- unsigned int part;
- uint8_t *pdst;
-
- if (!MLX5_TXOFF_CONFIG(MPW)) {
- /* Store the descriptor byte counter for eMPW sessions. */
- dseg->bcount = rte_cpu_to_be_32(len | MLX5_ETH_WQE_DATA_INLINE);
- pdst = &dseg->inline_data[0];
- } else {
- /* The entire legacy MPW session counter is stored on close. */
- pdst = (uint8_t *)dseg;
- }
- /*
- * The WQEBB space availability is checked by caller.
- * Here we should be aware of WQE ring buffer wraparound only.
- */
- part = (uint8_t *)txq->wqes_end - pdst;
- part = RTE_MIN(part, len);
- do {
- rte_memcpy(pdst, buf, part);
- len -= part;
- if (likely(!len)) {
- pdst += part;
- if (!MLX5_TXOFF_CONFIG(MPW))
- pdst = RTE_PTR_ALIGN(pdst, MLX5_WSEG_SIZE);
- /* Note: no final wraparound check here. */
- return (struct mlx5_wqe_dseg *)pdst;
- }
- pdst = (uint8_t *)txq->wqes;
- buf += part;
- part = len;
- } while (true);
-}
-
-/**
- * Build the Data Segment of inlined data from single
- * segment packet with VLAN insertion.
- *
- * @param txq
- * Pointer to TX queue structure.
- * @param loc
- * Pointer to burst routine local context.
- * @param dseg
- * Pointer to the dseg fill with built Data Segment.
- * @param buf
- * Data buffer to point.
- * @param len
- * Data buffer length.
- * @param olx
- * Configured Tx offloads mask. It is fully defined at
- * compile time and may be used for optimization.
- *
- * @return
- * Pointer to the next Data Segment after inlined data.
- * Ring buffer wraparound check is needed.
- */
-static __rte_always_inline struct mlx5_wqe_dseg *
-mlx5_tx_dseg_vlan(struct mlx5_txq_data *__rte_restrict txq,
- struct mlx5_txq_local *__rte_restrict loc __rte_unused,
- struct mlx5_wqe_dseg *__rte_restrict dseg,
- uint8_t *buf,
- unsigned int len,
- unsigned int olx __rte_unused)
-
-{
- unsigned int part;
- uint8_t *pdst;
-
- MLX5_ASSERT(len > MLX5_ESEG_MIN_INLINE_SIZE);
- if (!MLX5_TXOFF_CONFIG(MPW)) {
- /* Store the descriptor byte counter for eMPW sessions. */
- dseg->bcount = rte_cpu_to_be_32
- ((len + sizeof(struct rte_vlan_hdr)) |
- MLX5_ETH_WQE_DATA_INLINE);
- pdst = &dseg->inline_data[0];
- } else {
- /* The entire legacy MPW session counter is stored on close. */
- pdst = (uint8_t *)dseg;
- }
- memcpy(pdst, buf, MLX5_DSEG_MIN_INLINE_SIZE);
- buf += MLX5_DSEG_MIN_INLINE_SIZE;
- pdst += MLX5_DSEG_MIN_INLINE_SIZE;
- len -= MLX5_DSEG_MIN_INLINE_SIZE;
- /* Insert VLAN ethertype + VLAN tag. Pointer is aligned. */
- MLX5_ASSERT(pdst == RTE_PTR_ALIGN(pdst, MLX5_WSEG_SIZE));
- if (unlikely(pdst >= (uint8_t *)txq->wqes_end))
- pdst = (uint8_t *)txq->wqes;
- *(uint32_t *)pdst = rte_cpu_to_be_32((RTE_ETHER_TYPE_VLAN << 16) |
- loc->mbuf->vlan_tci);
- pdst += sizeof(struct rte_vlan_hdr);
- /*
- * The WQEBB space availability is checked by caller.
- * Here we should be aware of WQE ring buffer wraparound only.
- */
- part = (uint8_t *)txq->wqes_end - pdst;
- part = RTE_MIN(part, len);
- do {
- rte_memcpy(pdst, buf, part);
- len -= part;
- if (likely(!len)) {
- pdst += part;
- if (!MLX5_TXOFF_CONFIG(MPW))
- pdst = RTE_PTR_ALIGN(pdst, MLX5_WSEG_SIZE);
- /* Note: no final wraparound check here. */
- return (struct mlx5_wqe_dseg *)pdst;
- }
- pdst = (uint8_t *)txq->wqes;
- buf += part;
- part = len;
- } while (true);
-}
-
-/**
- * Build the Ethernet Segment with optionally inlined data with
- * VLAN insertion and following Data Segments (if any) from
- * multi-segment packet. Used by ordinary send and TSO.
- *
- * @param txq
- * Pointer to TX queue structure.
- * @param loc
- * Pointer to burst routine local context.
- * @param wqe
- * Pointer to WQE to fill with built Ethernet/Data Segments.
- * @param vlan
- * Length of VLAN header to insert, 0 means no VLAN insertion.
- * @param inlen
- * Data length to inline. For TSO this parameter specifies
- * exact value, for ordinary send routine can be aligned by
- * caller to provide better WQE space saving and data buffer
- * start address alignment. This length includes VLAN header
- * being inserted.
- * @param tso
- * Zero means ordinary send, inlined data can be extended,
- * otherwise this is TSO, inlined data length is fixed.
- * @param olx
- * Configured Tx offloads mask. It is fully defined at
- * compile time and may be used for optimization.
- *
- * @return
- * Actual size of built WQE in segments.
- */
-static __rte_always_inline unsigned int
-mlx5_tx_mseg_build(struct mlx5_txq_data *__rte_restrict txq,
- struct mlx5_txq_local *__rte_restrict loc,
- struct mlx5_wqe *__rte_restrict wqe,
- unsigned int vlan,
- unsigned int inlen,
- unsigned int tso,
- unsigned int olx __rte_unused)
-{
- struct mlx5_wqe_dseg *__rte_restrict dseg;
- unsigned int ds;
-
- MLX5_ASSERT((rte_pktmbuf_pkt_len(loc->mbuf) + vlan) >= inlen);
- loc->mbuf_nseg = NB_SEGS(loc->mbuf);
- loc->mbuf_off = 0;
-
- dseg = mlx5_tx_eseg_mdat(txq, loc, wqe, vlan, inlen, tso, olx);
- if (!loc->mbuf_nseg)
- goto dseg_done;
- /*
- * There are still some mbuf remaining, not inlined.
- * The first mbuf may be partially inlined and we
- * must process the possible non-zero data offset.
- */
- if (loc->mbuf_off) {
- unsigned int dlen;
- uint8_t *dptr;
-
- /*
- * Exhausted packets must be dropped before.
- * Non-zero offset means there are some data
- * remained in the packet.
- */
- MLX5_ASSERT(loc->mbuf_off < rte_pktmbuf_data_len(loc->mbuf));
- MLX5_ASSERT(rte_pktmbuf_data_len(loc->mbuf));
- dptr = rte_pktmbuf_mtod_offset(loc->mbuf, uint8_t *,
- loc->mbuf_off);
- dlen = rte_pktmbuf_data_len(loc->mbuf) - loc->mbuf_off;
- /*
- * Build the pointer/minimal data Data Segment.
- * Do ring buffer wrapping check in advance.
- */
- if ((uintptr_t)dseg >= (uintptr_t)txq->wqes_end)
- dseg = (struct mlx5_wqe_dseg *)txq->wqes;
- mlx5_tx_dseg_iptr(txq, loc, dseg, dptr, dlen, olx);
- /* Store the mbuf to be freed on completion. */
- MLX5_ASSERT(loc->elts_free);
- txq->elts[txq->elts_head++ & txq->elts_m] = loc->mbuf;
- --loc->elts_free;
- ++dseg;
- if (--loc->mbuf_nseg == 0)
- goto dseg_done;
- loc->mbuf = loc->mbuf->next;
- loc->mbuf_off = 0;
- }
- do {
- if (unlikely(!rte_pktmbuf_data_len(loc->mbuf))) {
- struct rte_mbuf *mbuf;
-
- /* Zero length segment found, just skip. */
- mbuf = loc->mbuf;
- loc->mbuf = loc->mbuf->next;
- rte_pktmbuf_free_seg(mbuf);
- if (--loc->mbuf_nseg == 0)
- break;
- } else {
- if ((uintptr_t)dseg >= (uintptr_t)txq->wqes_end)
- dseg = (struct mlx5_wqe_dseg *)txq->wqes;
- mlx5_tx_dseg_iptr
- (txq, loc, dseg,
- rte_pktmbuf_mtod(loc->mbuf, uint8_t *),
- rte_pktmbuf_data_len(loc->mbuf), olx);
- MLX5_ASSERT(loc->elts_free);
- txq->elts[txq->elts_head++ & txq->elts_m] = loc->mbuf;
- --loc->elts_free;
- ++dseg;
- if (--loc->mbuf_nseg == 0)
- break;
- loc->mbuf = loc->mbuf->next;
- }
- } while (true);
-
-dseg_done:
- /* Calculate actual segments used from the dseg pointer. */
- if ((uintptr_t)wqe < (uintptr_t)dseg)
- ds = ((uintptr_t)dseg - (uintptr_t)wqe) / MLX5_WSEG_SIZE;
- else
- ds = (((uintptr_t)dseg - (uintptr_t)wqe) +
- txq->wqe_s * MLX5_WQE_SIZE) / MLX5_WSEG_SIZE;
- return ds;
-}
-
-/**
- * The routine checks timestamp flag in the current packet,
- * and push WAIT WQE into the queue if scheduling is required.
- *
- * @param txq
- * Pointer to TX queue structure.
- * @param loc
- * Pointer to burst routine local context.
- * @param olx
- * Configured Tx offloads mask. It is fully defined at
- * compile time and may be used for optimization.
- *
- * @return
- * MLX5_TXCMP_CODE_EXIT - sending is done or impossible.
- * MLX5_TXCMP_CODE_SINGLE - continue processing with the packet.
- * MLX5_TXCMP_CODE_MULTI - the WAIT inserted, continue processing.
- * Local context variables partially updated.
- */
-static __rte_always_inline enum mlx5_txcmp_code
-mlx5_tx_schedule_send(struct mlx5_txq_data *restrict txq,
- struct mlx5_txq_local *restrict loc,
- unsigned int olx)
-{
- if (MLX5_TXOFF_CONFIG(TXPP) &&
- loc->mbuf->ol_flags & txq->ts_mask) {
- struct mlx5_wqe *wqe;
- uint64_t ts;
- int32_t wci;
-
- /*
- * Estimate the required space quickly and roughly.
- * We would like to ensure the packet can be pushed
- * to the queue and we won't get the orphan WAIT WQE.
- */
- if (loc->wqe_free <= MLX5_WQE_SIZE_MAX / MLX5_WQE_SIZE ||
- loc->elts_free < NB_SEGS(loc->mbuf))
- return MLX5_TXCMP_CODE_EXIT;
- /* Convert the timestamp into completion to wait. */
- ts = *RTE_MBUF_DYNFIELD(loc->mbuf, txq->ts_offset, uint64_t *);
- wci = mlx5_txpp_convert_tx_ts(txq->sh, ts);
- if (unlikely(wci < 0))
- return MLX5_TXCMP_CODE_SINGLE;
- /* Build the WAIT WQE with specified completion. */
- wqe = txq->wqes + (txq->wqe_ci & txq->wqe_m);
- mlx5_tx_cseg_init(txq, loc, wqe, 2, MLX5_OPCODE_WAIT, olx);
- mlx5_tx_wseg_init(txq, loc, wqe, wci, olx);
- ++txq->wqe_ci;
- --loc->wqe_free;
- return MLX5_TXCMP_CODE_MULTI;
- }
- return MLX5_TXCMP_CODE_SINGLE;
-}
-
-/**
- * Tx one packet function for multi-segment TSO. Supports all
- * types of Tx offloads, uses MLX5_OPCODE_TSO to build WQEs,
- * sends one packet per WQE.
- *
- * This routine is responsible for storing processed mbuf
- * into elts ring buffer and update elts_head.
- *
- * @param txq
- * Pointer to TX queue structure.
- * @param loc
- * Pointer to burst routine local context.
- * @param olx
- * Configured Tx offloads mask. It is fully defined at
- * compile time and may be used for optimization.
- *
- * @return
- * MLX5_TXCMP_CODE_EXIT - sending is done or impossible.
- * MLX5_TXCMP_CODE_ERROR - some unrecoverable error occurred.
- * Local context variables partially updated.
- */
-static __rte_always_inline enum mlx5_txcmp_code
-mlx5_tx_packet_multi_tso(struct mlx5_txq_data *__rte_restrict txq,
- struct mlx5_txq_local *__rte_restrict loc,
- unsigned int olx)
-{
- struct mlx5_wqe *__rte_restrict wqe;
- unsigned int ds, dlen, inlen, ntcp, vlan = 0;
-
- if (MLX5_TXOFF_CONFIG(TXPP)) {
- enum mlx5_txcmp_code wret;
-
- /* Generate WAIT for scheduling if requested. */
- wret = mlx5_tx_schedule_send(txq, loc, olx);
- if (wret == MLX5_TXCMP_CODE_EXIT)
- return MLX5_TXCMP_CODE_EXIT;
- if (wret == MLX5_TXCMP_CODE_ERROR)
- return MLX5_TXCMP_CODE_ERROR;
- }
- /*
- * Calculate data length to be inlined to estimate
- * the required space in WQE ring buffer.
- */
- dlen = rte_pktmbuf_pkt_len(loc->mbuf);
- if (MLX5_TXOFF_CONFIG(VLAN) && loc->mbuf->ol_flags & PKT_TX_VLAN_PKT)
- vlan = sizeof(struct rte_vlan_hdr);
- inlen = loc->mbuf->l2_len + vlan +
- loc->mbuf->l3_len + loc->mbuf->l4_len;
- if (unlikely((!inlen || !loc->mbuf->tso_segsz)))
- return MLX5_TXCMP_CODE_ERROR;
- if (loc->mbuf->ol_flags & PKT_TX_TUNNEL_MASK)
- inlen += loc->mbuf->outer_l2_len + loc->mbuf->outer_l3_len;
- /* Packet must contain all TSO headers. */
- if (unlikely(inlen > MLX5_MAX_TSO_HEADER ||
- inlen <= MLX5_ESEG_MIN_INLINE_SIZE ||
- inlen > (dlen + vlan)))
- return MLX5_TXCMP_CODE_ERROR;
- MLX5_ASSERT(inlen >= txq->inlen_mode);
- /*
- * Check whether there are enough free WQEBBs:
- * - Control Segment
- * - Ethernet Segment
- * - First Segment of inlined Ethernet data
- * - ... data continued ...
- * - Data Segments of pointer/min inline type
- */
- ds = NB_SEGS(loc->mbuf) + 2 + (inlen -
- MLX5_ESEG_MIN_INLINE_SIZE +
- MLX5_WSEG_SIZE +
- MLX5_WSEG_SIZE - 1) / MLX5_WSEG_SIZE;
- if (unlikely(loc->wqe_free < ((ds + 3) / 4)))
- return MLX5_TXCMP_CODE_EXIT;
- /* Check for maximal WQE size. */
- if (unlikely((MLX5_WQE_SIZE_MAX / MLX5_WSEG_SIZE) < ((ds + 3) / 4)))
- return MLX5_TXCMP_CODE_ERROR;
-#ifdef MLX5_PMD_SOFT_COUNTERS
- /* Update sent data bytes/packets counters. */
- ntcp = (dlen - (inlen - vlan) + loc->mbuf->tso_segsz - 1) /
- loc->mbuf->tso_segsz;
- /*
- * One will be added for mbuf itself
- * at the end of the mlx5_tx_burst from
- * loc->pkts_sent field.
- */
- --ntcp;
- txq->stats.opackets += ntcp;
- txq->stats.obytes += dlen + vlan + ntcp * inlen;
-#endif
- wqe = txq->wqes + (txq->wqe_ci & txq->wqe_m);
- loc->wqe_last = wqe;
- mlx5_tx_cseg_init(txq, loc, wqe, 0, MLX5_OPCODE_TSO, olx);
- ds = mlx5_tx_mseg_build(txq, loc, wqe, vlan, inlen, 1, olx);
- wqe->cseg.sq_ds = rte_cpu_to_be_32(txq->qp_num_8s | ds);
- txq->wqe_ci += (ds + 3) / 4;
- loc->wqe_free -= (ds + 3) / 4;
- return MLX5_TXCMP_CODE_MULTI;
-}
-
-/**
- * Tx one packet function for multi-segment SEND. Supports all
- * types of Tx offloads, uses MLX5_OPCODE_SEND to build WQEs,
- * sends one packet per WQE, without any data inlining in
- * Ethernet Segment.
- *
- * This routine is responsible for storing processed mbuf
- * into elts ring buffer and update elts_head.
- *
- * @param txq
- * Pointer to TX queue structure.
- * @param loc
- * Pointer to burst routine local context.
- * @param olx
- * Configured Tx offloads mask. It is fully defined at
- * compile time and may be used for optimization.
- *
- * @return
- * MLX5_TXCMP_CODE_EXIT - sending is done or impossible.
- * MLX5_TXCMP_CODE_ERROR - some unrecoverable error occurred.
- * Local context variables partially updated.
- */
-static __rte_always_inline enum mlx5_txcmp_code
-mlx5_tx_packet_multi_send(struct mlx5_txq_data *__rte_restrict txq,
- struct mlx5_txq_local *__rte_restrict loc,
- unsigned int olx)
-{
- struct mlx5_wqe_dseg *__rte_restrict dseg;
- struct mlx5_wqe *__rte_restrict wqe;
- unsigned int ds, nseg;
-
- MLX5_ASSERT(NB_SEGS(loc->mbuf) > 1);
- if (MLX5_TXOFF_CONFIG(TXPP)) {
- enum mlx5_txcmp_code wret;
-
- /* Generate WAIT for scheduling if requested. */
- wret = mlx5_tx_schedule_send(txq, loc, olx);
- if (wret == MLX5_TXCMP_CODE_EXIT)
- return MLX5_TXCMP_CODE_EXIT;
- if (wret == MLX5_TXCMP_CODE_ERROR)
- return MLX5_TXCMP_CODE_ERROR;
- }
- /*
- * No inline at all, it means the CPU cycles saving
- * is prioritized at configuration, we should not
- * copy any packet data to WQE.
- */
- nseg = NB_SEGS(loc->mbuf);
- ds = 2 + nseg;
- if (unlikely(loc->wqe_free < ((ds + 3) / 4)))
- return MLX5_TXCMP_CODE_EXIT;
- /* Check for maximal WQE size. */
- if (unlikely((MLX5_WQE_SIZE_MAX / MLX5_WSEG_SIZE) < ((ds + 3) / 4)))
- return MLX5_TXCMP_CODE_ERROR;
- /*
- * Some Tx offloads may cause an error if
- * packet is not long enough, check against
- * assumed minimal length.
- */
- if (rte_pktmbuf_pkt_len(loc->mbuf) <= MLX5_ESEG_MIN_INLINE_SIZE)
- return MLX5_TXCMP_CODE_ERROR;
-#ifdef MLX5_PMD_SOFT_COUNTERS
- /* Update sent data bytes counter. */
- txq->stats.obytes += rte_pktmbuf_pkt_len(loc->mbuf);
- if (MLX5_TXOFF_CONFIG(VLAN) &&
- loc->mbuf->ol_flags & PKT_TX_VLAN_PKT)
- txq->stats.obytes += sizeof(struct rte_vlan_hdr);
-#endif
- /*
- * SEND WQE, one WQEBB:
- * - Control Segment, SEND opcode
- * - Ethernet Segment, optional VLAN, no inline
- * - Data Segments, pointer only type
- */
- wqe = txq->wqes + (txq->wqe_ci & txq->wqe_m);
- loc->wqe_last = wqe;
- mlx5_tx_cseg_init(txq, loc, wqe, ds, MLX5_OPCODE_SEND, olx);
- mlx5_tx_eseg_none(txq, loc, wqe, olx);
- dseg = &wqe->dseg[0];
- do {
- if (unlikely(!rte_pktmbuf_data_len(loc->mbuf))) {
- struct rte_mbuf *mbuf;
-
- /*
- * Zero length segment found, have to
- * correct total size of WQE in segments.
- * It is supposed to be rare occasion, so
- * in normal case (no zero length segments)
- * we avoid extra writing to the Control
- * Segment.
- */
- --ds;
- wqe->cseg.sq_ds -= RTE_BE32(1);
- mbuf = loc->mbuf;
- loc->mbuf = mbuf->next;
- rte_pktmbuf_free_seg(mbuf);
- if (--nseg == 0)
- break;
- } else {
- mlx5_tx_dseg_ptr
- (txq, loc, dseg,
- rte_pktmbuf_mtod(loc->mbuf, uint8_t *),
- rte_pktmbuf_data_len(loc->mbuf), olx);
- txq->elts[txq->elts_head++ & txq->elts_m] = loc->mbuf;
- --loc->elts_free;
- if (--nseg == 0)
- break;
- ++dseg;
- if ((uintptr_t)dseg >= (uintptr_t)txq->wqes_end)
- dseg = (struct mlx5_wqe_dseg *)txq->wqes;
- loc->mbuf = loc->mbuf->next;
- }
- } while (true);
- txq->wqe_ci += (ds + 3) / 4;
- loc->wqe_free -= (ds + 3) / 4;
- return MLX5_TXCMP_CODE_MULTI;
-}
-
-/**
- * Tx one packet function for multi-segment SEND. Supports all
- * types of Tx offloads, uses MLX5_OPCODE_SEND to build WQEs,
- * sends one packet per WQE, with data inlining in
- * Ethernet Segment and minimal Data Segments.
- *
- * This routine is responsible for storing processed mbuf
- * into elts ring buffer and update elts_head.
- *
- * @param txq
- * Pointer to TX queue structure.
- * @param loc
- * Pointer to burst routine local context.
- * @param olx
- * Configured Tx offloads mask. It is fully defined at
- * compile time and may be used for optimization.
- *
- * @return
- * MLX5_TXCMP_CODE_EXIT - sending is done or impossible.
- * MLX5_TXCMP_CODE_ERROR - some unrecoverable error occurred.
- * Local context variables partially updated.
- */
-static __rte_always_inline enum mlx5_txcmp_code
-mlx5_tx_packet_multi_inline(struct mlx5_txq_data *__rte_restrict txq,
- struct mlx5_txq_local *__rte_restrict loc,
- unsigned int olx)
-{
- struct mlx5_wqe *__rte_restrict wqe;
- unsigned int ds, inlen, dlen, vlan = 0;
-
- MLX5_ASSERT(MLX5_TXOFF_CONFIG(INLINE));
- MLX5_ASSERT(NB_SEGS(loc->mbuf) > 1);
- if (MLX5_TXOFF_CONFIG(TXPP)) {
- enum mlx5_txcmp_code wret;
-
- /* Generate WAIT for scheduling if requested. */
- wret = mlx5_tx_schedule_send(txq, loc, olx);
- if (wret == MLX5_TXCMP_CODE_EXIT)
- return MLX5_TXCMP_CODE_EXIT;
- if (wret == MLX5_TXCMP_CODE_ERROR)
- return MLX5_TXCMP_CODE_ERROR;
- }
- /*
- * First calculate data length to be inlined
- * to estimate the required space for WQE.
- */
- dlen = rte_pktmbuf_pkt_len(loc->mbuf);
- if (MLX5_TXOFF_CONFIG(VLAN) && loc->mbuf->ol_flags & PKT_TX_VLAN_PKT)
- vlan = sizeof(struct rte_vlan_hdr);
- inlen = dlen + vlan;
- /* Check against minimal length. */
- if (inlen <= MLX5_ESEG_MIN_INLINE_SIZE)
- return MLX5_TXCMP_CODE_ERROR;
- MLX5_ASSERT(txq->inlen_send >= MLX5_ESEG_MIN_INLINE_SIZE);
- if (inlen > txq->inlen_send ||
- loc->mbuf->ol_flags & PKT_TX_DYNF_NOINLINE) {
- struct rte_mbuf *mbuf;
- unsigned int nxlen;
- uintptr_t start;
-
- /*
- * Packet length exceeds the allowed inline
- * data length, check whether the minimal
- * inlining is required.
- */
- if (txq->inlen_mode) {
- MLX5_ASSERT(txq->inlen_mode >=
- MLX5_ESEG_MIN_INLINE_SIZE);
- MLX5_ASSERT(txq->inlen_mode <= txq->inlen_send);
- inlen = txq->inlen_mode;
- } else {
- if (loc->mbuf->ol_flags & PKT_TX_DYNF_NOINLINE ||
- !vlan || txq->vlan_en) {
- /*
- * VLAN insertion will be done inside by HW.
- * It is not utmost effective - VLAN flag is
- * checked twice, but we should proceed the
- * inlining length correctly and take into
- * account the VLAN header being inserted.
- */
- return mlx5_tx_packet_multi_send
- (txq, loc, olx);
- }
- inlen = MLX5_ESEG_MIN_INLINE_SIZE;
- }
- /*
- * Now we know the minimal amount of data is requested
- * to inline. Check whether we should inline the buffers
- * from the chain beginning to eliminate some mbufs.
- */
- mbuf = loc->mbuf;
- nxlen = rte_pktmbuf_data_len(mbuf);
- if (unlikely(nxlen <= txq->inlen_send)) {
- /* We can inline first mbuf at least. */
- if (nxlen < inlen) {
- unsigned int smlen;
-
- /* Scan mbufs till inlen filled. */
- do {
- smlen = nxlen;
- mbuf = NEXT(mbuf);
- MLX5_ASSERT(mbuf);
- nxlen = rte_pktmbuf_data_len(mbuf);
- nxlen += smlen;
- } while (unlikely(nxlen < inlen));
- if (unlikely(nxlen > txq->inlen_send)) {
- /* We cannot inline entire mbuf. */
- smlen = inlen - smlen;
- start = rte_pktmbuf_mtod_offset
- (mbuf, uintptr_t, smlen);
- goto do_align;
- }
- }
- do {
- inlen = nxlen;
- mbuf = NEXT(mbuf);
- /* There should be not end of packet. */
- MLX5_ASSERT(mbuf);
- nxlen = inlen + rte_pktmbuf_data_len(mbuf);
- } while (unlikely(nxlen < txq->inlen_send));
- }
- start = rte_pktmbuf_mtod(mbuf, uintptr_t);
- /*
- * Check whether we can do inline to align start
- * address of data buffer to cacheline.
- */
-do_align:
- start = (~start + 1) & (RTE_CACHE_LINE_SIZE - 1);
- if (unlikely(start)) {
- start += inlen;
- if (start <= txq->inlen_send)
- inlen = start;
- }
- }
- /*
- * Check whether there are enough free WQEBBs:
- * - Control Segment
- * - Ethernet Segment
- * - First Segment of inlined Ethernet data
- * - ... data continued ...
- * - Data Segments of pointer/min inline type
- *
- * Estimate the number of Data Segments conservatively,
- * supposing no any mbufs is being freed during inlining.
- */
- MLX5_ASSERT(inlen <= txq->inlen_send);
- ds = NB_SEGS(loc->mbuf) + 2 + (inlen -
- MLX5_ESEG_MIN_INLINE_SIZE +
- MLX5_WSEG_SIZE +
- MLX5_WSEG_SIZE - 1) / MLX5_WSEG_SIZE;
- if (unlikely(loc->wqe_free < ((ds + 3) / 4)))
- return MLX5_TXCMP_CODE_EXIT;
- /* Check for maximal WQE size. */
- if (unlikely((MLX5_WQE_SIZE_MAX / MLX5_WSEG_SIZE) < ((ds + 3) / 4)))
- return MLX5_TXCMP_CODE_ERROR;
-#ifdef MLX5_PMD_SOFT_COUNTERS
- /* Update sent data bytes/packets counters. */
- txq->stats.obytes += dlen + vlan;
-#endif
- wqe = txq->wqes + (txq->wqe_ci & txq->wqe_m);
- loc->wqe_last = wqe;
- mlx5_tx_cseg_init(txq, loc, wqe, 0, MLX5_OPCODE_SEND, olx);
- ds = mlx5_tx_mseg_build(txq, loc, wqe, vlan, inlen, 0, olx);
- wqe->cseg.sq_ds = rte_cpu_to_be_32(txq->qp_num_8s | ds);
- txq->wqe_ci += (ds + 3) / 4;
- loc->wqe_free -= (ds + 3) / 4;
- return MLX5_TXCMP_CODE_MULTI;
-}
-
-/**
- * Tx burst function for multi-segment packets. Supports all
- * types of Tx offloads, uses MLX5_OPCODE_SEND/TSO to build WQEs,
- * sends one packet per WQE. Function stops sending if it
- * encounters the single-segment packet.
- *
- * This routine is responsible for storing processed mbuf
- * into elts ring buffer and update elts_head.
- *
- * @param txq
- * Pointer to TX queue structure.
- * @param[in] pkts
- * Packets to transmit.
- * @param pkts_n
- * Number of packets in array.
- * @param loc
- * Pointer to burst routine local context.
- * @param olx
- * Configured Tx offloads mask. It is fully defined at
- * compile time and may be used for optimization.
- *
- * @return
- * MLX5_TXCMP_CODE_EXIT - sending is done or impossible.
- * MLX5_TXCMP_CODE_ERROR - some unrecoverable error occurred.
- * MLX5_TXCMP_CODE_SINGLE - single-segment packet encountered.
- * MLX5_TXCMP_CODE_TSO - TSO single-segment packet encountered.
- * Local context variables updated.
- */
-static __rte_always_inline enum mlx5_txcmp_code
-mlx5_tx_burst_mseg(struct mlx5_txq_data *__rte_restrict txq,
- struct rte_mbuf **__rte_restrict pkts,
- unsigned int pkts_n,
- struct mlx5_txq_local *__rte_restrict loc,
- unsigned int olx)
-{
- MLX5_ASSERT(loc->elts_free && loc->wqe_free);
- MLX5_ASSERT(pkts_n > loc->pkts_sent);
- pkts += loc->pkts_sent + 1;
- pkts_n -= loc->pkts_sent;
- for (;;) {
- enum mlx5_txcmp_code ret;
-
- MLX5_ASSERT(NB_SEGS(loc->mbuf) > 1);
- /*
- * Estimate the number of free elts quickly but
- * conservatively. Some segment may be fully inlined
- * and freed, ignore this here - precise estimation
- * is costly.
- */
- if (loc->elts_free < NB_SEGS(loc->mbuf))
- return MLX5_TXCMP_CODE_EXIT;
- if (MLX5_TXOFF_CONFIG(TSO) &&
- unlikely(loc->mbuf->ol_flags & PKT_TX_TCP_SEG)) {
- /* Proceed with multi-segment TSO. */
- ret = mlx5_tx_packet_multi_tso(txq, loc, olx);
- } else if (MLX5_TXOFF_CONFIG(INLINE)) {
- /* Proceed with multi-segment SEND with inlining. */
- ret = mlx5_tx_packet_multi_inline(txq, loc, olx);
- } else {
- /* Proceed with multi-segment SEND w/o inlining. */
- ret = mlx5_tx_packet_multi_send(txq, loc, olx);
- }
- if (ret == MLX5_TXCMP_CODE_EXIT)
- return MLX5_TXCMP_CODE_EXIT;
- if (ret == MLX5_TXCMP_CODE_ERROR)
- return MLX5_TXCMP_CODE_ERROR;
- /* WQE is built, go to the next packet. */
- ++loc->pkts_sent;
- --pkts_n;
- if (unlikely(!pkts_n || !loc->elts_free || !loc->wqe_free))
- return MLX5_TXCMP_CODE_EXIT;
- loc->mbuf = *pkts++;
- if (pkts_n > 1)
- rte_prefetch0(*pkts);
- if (likely(NB_SEGS(loc->mbuf) > 1))
- continue;
- /* Here ends the series of multi-segment packets. */
- if (MLX5_TXOFF_CONFIG(TSO) &&
- unlikely(loc->mbuf->ol_flags & PKT_TX_TCP_SEG))
- return MLX5_TXCMP_CODE_TSO;
- return MLX5_TXCMP_CODE_SINGLE;
- }
- MLX5_ASSERT(false);
-}
-
-/**
- * Tx burst function for single-segment packets with TSO.
- * Supports all types of Tx offloads, except multi-packets.
- * Uses MLX5_OPCODE_TSO to build WQEs, sends one packet per WQE.
- * Function stops sending if it encounters the multi-segment
- * packet or packet without TSO requested.
- *
- * The routine is responsible for storing processed mbuf
- * into elts ring buffer and update elts_head if inline
- * offloads is requested due to possible early freeing
- * of the inlined mbufs (can not store pkts array in elts
- * as a batch).
- *
- * @param txq
- * Pointer to TX queue structure.
- * @param[in] pkts
- * Packets to transmit.
- * @param pkts_n
- * Number of packets in array.
- * @param loc
- * Pointer to burst routine local context.
- * @param olx
- * Configured Tx offloads mask. It is fully defined at
- * compile time and may be used for optimization.
- *
- * @return
- * MLX5_TXCMP_CODE_EXIT - sending is done or impossible.
- * MLX5_TXCMP_CODE_ERROR - some unrecoverable error occurred.
- * MLX5_TXCMP_CODE_SINGLE - single-segment packet encountered.
- * MLX5_TXCMP_CODE_MULTI - multi-segment packet encountered.
- * Local context variables updated.
- */
-static __rte_always_inline enum mlx5_txcmp_code
-mlx5_tx_burst_tso(struct mlx5_txq_data *__rte_restrict txq,
- struct rte_mbuf **__rte_restrict pkts,
- unsigned int pkts_n,
- struct mlx5_txq_local *__rte_restrict loc,
- unsigned int olx)
-{
- MLX5_ASSERT(loc->elts_free && loc->wqe_free);
- MLX5_ASSERT(pkts_n > loc->pkts_sent);
- pkts += loc->pkts_sent + 1;
- pkts_n -= loc->pkts_sent;
- for (;;) {
- struct mlx5_wqe_dseg *__rte_restrict dseg;
- struct mlx5_wqe *__rte_restrict wqe;
- unsigned int ds, dlen, hlen, ntcp, vlan = 0;
- uint8_t *dptr;
-
- MLX5_ASSERT(NB_SEGS(loc->mbuf) == 1);
- if (MLX5_TXOFF_CONFIG(TXPP)) {
- enum mlx5_txcmp_code wret;
-
- /* Generate WAIT for scheduling if requested. */
- wret = mlx5_tx_schedule_send(txq, loc, olx);
- if (wret == MLX5_TXCMP_CODE_EXIT)
- return MLX5_TXCMP_CODE_EXIT;
- if (wret == MLX5_TXCMP_CODE_ERROR)
- return MLX5_TXCMP_CODE_ERROR;
- }
- dlen = rte_pktmbuf_data_len(loc->mbuf);
- if (MLX5_TXOFF_CONFIG(VLAN) &&
- loc->mbuf->ol_flags & PKT_TX_VLAN_PKT) {
- vlan = sizeof(struct rte_vlan_hdr);
- }
- /*
- * First calculate the WQE size to check
- * whether we have enough space in ring buffer.
- */
- hlen = loc->mbuf->l2_len + vlan +
- loc->mbuf->l3_len + loc->mbuf->l4_len;
- if (unlikely((!hlen || !loc->mbuf->tso_segsz)))
- return MLX5_TXCMP_CODE_ERROR;
- if (loc->mbuf->ol_flags & PKT_TX_TUNNEL_MASK)
- hlen += loc->mbuf->outer_l2_len +
- loc->mbuf->outer_l3_len;
- /* Segment must contain all TSO headers. */
- if (unlikely(hlen > MLX5_MAX_TSO_HEADER ||
- hlen <= MLX5_ESEG_MIN_INLINE_SIZE ||
- hlen > (dlen + vlan)))
- return MLX5_TXCMP_CODE_ERROR;
- /*
- * Check whether there are enough free WQEBBs:
- * - Control Segment
- * - Ethernet Segment
- * - First Segment of inlined Ethernet data
- * - ... data continued ...
- * - Finishing Data Segment of pointer type
- */
- ds = 4 + (hlen - MLX5_ESEG_MIN_INLINE_SIZE +
- MLX5_WSEG_SIZE - 1) / MLX5_WSEG_SIZE;
- if (loc->wqe_free < ((ds + 3) / 4))
- return MLX5_TXCMP_CODE_EXIT;
-#ifdef MLX5_PMD_SOFT_COUNTERS
- /* Update sent data bytes/packets counters. */
- ntcp = (dlen + vlan - hlen +
- loc->mbuf->tso_segsz - 1) /
- loc->mbuf->tso_segsz;
- /*
- * One will be added for mbuf itself at the end
- * of the mlx5_tx_burst from loc->pkts_sent field.
- */
- --ntcp;
- txq->stats.opackets += ntcp;
- txq->stats.obytes += dlen + vlan + ntcp * hlen;
-#endif
- /*
- * Build the TSO WQE:
- * - Control Segment
- * - Ethernet Segment with hlen bytes inlined
- * - Data Segment of pointer type
- */
- wqe = txq->wqes + (txq->wqe_ci & txq->wqe_m);
- loc->wqe_last = wqe;
- mlx5_tx_cseg_init(txq, loc, wqe, ds,
- MLX5_OPCODE_TSO, olx);
- dseg = mlx5_tx_eseg_data(txq, loc, wqe, vlan, hlen, 1, olx);
- dptr = rte_pktmbuf_mtod(loc->mbuf, uint8_t *) + hlen - vlan;
- dlen -= hlen - vlan;
- mlx5_tx_dseg_ptr(txq, loc, dseg, dptr, dlen, olx);
- /*
- * WQE is built, update the loop parameters
- * and go to the next packet.
- */
- txq->wqe_ci += (ds + 3) / 4;
- loc->wqe_free -= (ds + 3) / 4;
- if (MLX5_TXOFF_CONFIG(INLINE))
- txq->elts[txq->elts_head++ & txq->elts_m] = loc->mbuf;
- --loc->elts_free;
- ++loc->pkts_sent;
- --pkts_n;
- if (unlikely(!pkts_n || !loc->elts_free || !loc->wqe_free))
- return MLX5_TXCMP_CODE_EXIT;
- loc->mbuf = *pkts++;
- if (pkts_n > 1)
- rte_prefetch0(*pkts);
- if (MLX5_TXOFF_CONFIG(MULTI) &&
- unlikely(NB_SEGS(loc->mbuf) > 1))
- return MLX5_TXCMP_CODE_MULTI;
- if (likely(!(loc->mbuf->ol_flags & PKT_TX_TCP_SEG)))
- return MLX5_TXCMP_CODE_SINGLE;
- /* Continue with the next TSO packet. */
- }
- MLX5_ASSERT(false);
-}
-
-/**
- * Analyze the packet and select the best method to send.
- *
- * @param txq
- * Pointer to TX queue structure.
- * @param loc
- * Pointer to burst routine local context.
- * @param olx
- * Configured Tx offloads mask. It is fully defined at
- * compile time and may be used for optimization.
- * @param newp
- * The predefined flag whether do complete check for
- * multi-segment packets and TSO.
- *
- * @return
- * MLX5_TXCMP_CODE_MULTI - multi-segment packet encountered.
- * MLX5_TXCMP_CODE_TSO - TSO required, use TSO/LSO.
- * MLX5_TXCMP_CODE_SINGLE - single-segment packet, use SEND.
- * MLX5_TXCMP_CODE_EMPW - single-segment packet, use MPW.
- */
-static __rte_always_inline enum mlx5_txcmp_code
-mlx5_tx_able_to_empw(struct mlx5_txq_data *__rte_restrict txq,
- struct mlx5_txq_local *__rte_restrict loc,
- unsigned int olx,
- bool newp)
-{
- /* Check for multi-segment packet. */
- if (newp &&
- MLX5_TXOFF_CONFIG(MULTI) &&
- unlikely(NB_SEGS(loc->mbuf) > 1))
- return MLX5_TXCMP_CODE_MULTI;
- /* Check for TSO packet. */
- if (newp &&
- MLX5_TXOFF_CONFIG(TSO) &&
- unlikely(loc->mbuf->ol_flags & PKT_TX_TCP_SEG))
- return MLX5_TXCMP_CODE_TSO;
- /* Check if eMPW is enabled at all. */
- if (!MLX5_TXOFF_CONFIG(EMPW))
- return MLX5_TXCMP_CODE_SINGLE;
- /* Check if eMPW can be engaged. */
- if (MLX5_TXOFF_CONFIG(VLAN) &&
- unlikely(loc->mbuf->ol_flags & PKT_TX_VLAN_PKT) &&
- (!MLX5_TXOFF_CONFIG(INLINE) ||
- unlikely((rte_pktmbuf_data_len(loc->mbuf) +
- sizeof(struct rte_vlan_hdr)) > txq->inlen_empw))) {
- /*
- * eMPW does not support VLAN insertion offload,
- * we have to inline the entire packet but
- * packet is too long for inlining.
- */
- return MLX5_TXCMP_CODE_SINGLE;
- }
- return MLX5_TXCMP_CODE_EMPW;
-}
-
-/**
- * Check the next packet attributes to match with the eMPW batch ones.
- * In addition, for legacy MPW the packet length is checked either.
- *
- * @param txq
- * Pointer to TX queue structure.
- * @param es
- * Pointer to Ethernet Segment of eMPW batch.
- * @param loc
- * Pointer to burst routine local context.
- * @param dlen
- * Length of previous packet in MPW descriptor.
- * @param olx
- * Configured Tx offloads mask. It is fully defined at
- * compile time and may be used for optimization.
- *
- * @return
- * true - packet match with eMPW batch attributes.
- * false - no match, eMPW should be restarted.
- */
-static __rte_always_inline bool
-mlx5_tx_match_empw(struct mlx5_txq_data *__rte_restrict txq,
- struct mlx5_wqe_eseg *__rte_restrict es,
- struct mlx5_txq_local *__rte_restrict loc,
- uint32_t dlen,
- unsigned int olx)
-{
- uint8_t swp_flags = 0;
-
- /* Compare the checksum flags, if any. */
- if (MLX5_TXOFF_CONFIG(CSUM) &&
- txq_ol_cksum_to_cs(loc->mbuf) != es->cs_flags)
- return false;
- /* Compare the Software Parser offsets and flags. */
- if (MLX5_TXOFF_CONFIG(SWP) &&
- (es->swp_offs != txq_mbuf_to_swp(loc, &swp_flags, olx) ||
- es->swp_flags != swp_flags))
- return false;
- /* Fill metadata field if needed. */
- if (MLX5_TXOFF_CONFIG(METADATA) &&
- es->metadata != (loc->mbuf->ol_flags & PKT_TX_DYNF_METADATA ?
- *RTE_FLOW_DYNF_METADATA(loc->mbuf) : 0))
- return false;
- /* Legacy MPW can send packets with the same lengt only. */
- if (MLX5_TXOFF_CONFIG(MPW) &&
- dlen != rte_pktmbuf_data_len(loc->mbuf))
- return false;
- /* There must be no VLAN packets in eMPW loop. */
- if (MLX5_TXOFF_CONFIG(VLAN))
- MLX5_ASSERT(!(loc->mbuf->ol_flags & PKT_TX_VLAN_PKT));
- /* Check if the scheduling is requested. */
- if (MLX5_TXOFF_CONFIG(TXPP) &&
- loc->mbuf->ol_flags & txq->ts_mask)
- return false;
- return true;
-}
-
-/*
- * Update send loop variables and WQE for eMPW loop
- * without data inlining. Number of Data Segments is
- * equal to the number of sent packets.
- *
- * @param txq
- * Pointer to TX queue structure.
- * @param loc
- * Pointer to burst routine local context.
- * @param ds
- * Number of packets/Data Segments/Packets.
- * @param slen
- * Accumulated statistics, bytes sent
- * @param olx
- * Configured Tx offloads mask. It is fully defined at
- * compile time and may be used for optimization.
- *
- * @return
- * true - packet match with eMPW batch attributes.
- * false - no match, eMPW should be restarted.
- */
-static __rte_always_inline void
-mlx5_tx_sdone_empw(struct mlx5_txq_data *__rte_restrict txq,
- struct mlx5_txq_local *__rte_restrict loc,
- unsigned int ds,
- unsigned int slen,
- unsigned int olx __rte_unused)
-{
- MLX5_ASSERT(!MLX5_TXOFF_CONFIG(INLINE));
-#ifdef MLX5_PMD_SOFT_COUNTERS
- /* Update sent data bytes counter. */
- txq->stats.obytes += slen;
-#else
- (void)slen;
-#endif
- loc->elts_free -= ds;
- loc->pkts_sent += ds;
- ds += 2;
- loc->wqe_last->cseg.sq_ds = rte_cpu_to_be_32(txq->qp_num_8s | ds);
- txq->wqe_ci += (ds + 3) / 4;
- loc->wqe_free -= (ds + 3) / 4;
-}
-
-/*
- * Update send loop variables and WQE for eMPW loop
- * with data inlining. Gets the size of pushed descriptors
- * and data to the WQE.
- *
- * @param txq
- * Pointer to TX queue structure.
- * @param loc
- * Pointer to burst routine local context.
- * @param len
- * Total size of descriptor/data in bytes.
- * @param slen
- * Accumulated statistics, data bytes sent.
- * @param wqem
- * The base WQE for the eMPW/MPW descriptor.
- * @param olx
- * Configured Tx offloads mask. It is fully defined at
- * compile time and may be used for optimization.
- *
- * @return
- * true - packet match with eMPW batch attributes.
- * false - no match, eMPW should be restarted.
- */
-static __rte_always_inline void
-mlx5_tx_idone_empw(struct mlx5_txq_data *__rte_restrict txq,
- struct mlx5_txq_local *__rte_restrict loc,
- unsigned int len,
- unsigned int slen,
- struct mlx5_wqe *__rte_restrict wqem,
- unsigned int olx __rte_unused)
-{
- struct mlx5_wqe_dseg *dseg = &wqem->dseg[0];
-
- MLX5_ASSERT(MLX5_TXOFF_CONFIG(INLINE));
-#ifdef MLX5_PMD_SOFT_COUNTERS
- /* Update sent data bytes counter. */
- txq->stats.obytes += slen;
-#else
- (void)slen;
-#endif
- if (MLX5_TXOFF_CONFIG(MPW) && dseg->bcount == RTE_BE32(0)) {
- /*
- * If the legacy MPW session contains the inline packets
- * we should set the only inline data segment length
- * and align the total length to the segment size.
- */
- MLX5_ASSERT(len > sizeof(dseg->bcount));
- dseg->bcount = rte_cpu_to_be_32((len - sizeof(dseg->bcount)) |
- MLX5_ETH_WQE_DATA_INLINE);
- len = (len + MLX5_WSEG_SIZE - 1) / MLX5_WSEG_SIZE + 2;
- } else {
- /*
- * The session is not legacy MPW or contains the
- * data buffer pointer segments.
- */
- MLX5_ASSERT((len % MLX5_WSEG_SIZE) == 0);
- len = len / MLX5_WSEG_SIZE + 2;
- }
- wqem->cseg.sq_ds = rte_cpu_to_be_32(txq->qp_num_8s | len);
- txq->wqe_ci += (len + 3) / 4;
- loc->wqe_free -= (len + 3) / 4;
- loc->wqe_last = wqem;
-}
-
-/**
- * The set of Tx burst functions for single-segment packets
- * without TSO and with Multi-Packet Writing feature support.
- * Supports all types of Tx offloads, except multi-packets
- * and TSO.
- *
- * Uses MLX5_OPCODE_EMPW to build WQEs if possible and sends
- * as many packet per WQE as it can. If eMPW is not configured
- * or packet can not be sent with eMPW (VLAN insertion) the
- * ordinary SEND opcode is used and only one packet placed
- * in WQE.
- *
- * Functions stop sending if it encounters the multi-segment
- * packet or packet with TSO requested.
- *
- * The routines are responsible for storing processed mbuf
- * into elts ring buffer and update elts_head if inlining
- * offload is requested. Otherwise the copying mbufs to elts
- * can be postponed and completed at the end of burst routine.
- *
- * @param txq
- * Pointer to TX queue structure.
- * @param[in] pkts
- * Packets to transmit.
- * @param pkts_n
- * Number of packets in array.
- * @param loc
- * Pointer to burst routine local context.
- * @param olx
- * Configured Tx offloads mask. It is fully defined at
- * compile time and may be used for optimization.
- *
- * @return
- * MLX5_TXCMP_CODE_EXIT - sending is done or impossible.
- * MLX5_TXCMP_CODE_ERROR - some unrecoverable error occurred.
- * MLX5_TXCMP_CODE_MULTI - multi-segment packet encountered.
- * MLX5_TXCMP_CODE_TSO - TSO packet encountered.
- * MLX5_TXCMP_CODE_SINGLE - used inside functions set.
- * MLX5_TXCMP_CODE_EMPW - used inside functions set.
- *
- * Local context variables updated.
- *
- *
- * The routine sends packets with MLX5_OPCODE_EMPW
- * without inlining, this is dedicated optimized branch.
- * No VLAN insertion is supported.
- */
-static __rte_always_inline enum mlx5_txcmp_code
-mlx5_tx_burst_empw_simple(struct mlx5_txq_data *__rte_restrict txq,
- struct rte_mbuf **__rte_restrict pkts,
- unsigned int pkts_n,
- struct mlx5_txq_local *__rte_restrict loc,
- unsigned int olx)
-{
- /*
- * Subroutine is the part of mlx5_tx_burst_single()
- * and sends single-segment packet with eMPW opcode
- * without data inlining.
- */
- MLX5_ASSERT(!MLX5_TXOFF_CONFIG(INLINE));
- MLX5_ASSERT(MLX5_TXOFF_CONFIG(EMPW));
- MLX5_ASSERT(loc->elts_free && loc->wqe_free);
- MLX5_ASSERT(pkts_n > loc->pkts_sent);
- pkts += loc->pkts_sent + 1;
- pkts_n -= loc->pkts_sent;
- for (;;) {
- struct mlx5_wqe_dseg *__rte_restrict dseg;
- struct mlx5_wqe_eseg *__rte_restrict eseg;
- enum mlx5_txcmp_code ret;
- unsigned int part, loop;
- unsigned int slen = 0;
-
-next_empw:
- MLX5_ASSERT(NB_SEGS(loc->mbuf) == 1);
- if (MLX5_TXOFF_CONFIG(TXPP)) {
- enum mlx5_txcmp_code wret;
-
- /* Generate WAIT for scheduling if requested. */
- wret = mlx5_tx_schedule_send(txq, loc, olx);
- if (wret == MLX5_TXCMP_CODE_EXIT)
- return MLX5_TXCMP_CODE_EXIT;
- if (wret == MLX5_TXCMP_CODE_ERROR)
- return MLX5_TXCMP_CODE_ERROR;
- }
- part = RTE_MIN(pkts_n, MLX5_TXOFF_CONFIG(MPW) ?
- MLX5_MPW_MAX_PACKETS :
- MLX5_EMPW_MAX_PACKETS);
- if (unlikely(loc->elts_free < part)) {
- /* We have no enough elts to save all mbufs. */
- if (unlikely(loc->elts_free < MLX5_EMPW_MIN_PACKETS))
- return MLX5_TXCMP_CODE_EXIT;
- /* But we still able to send at least minimal eMPW. */
- part = loc->elts_free;
- }
- /* Check whether we have enough WQEs */
- if (unlikely(loc->wqe_free < ((2 + part + 3) / 4))) {
- if (unlikely(loc->wqe_free <
- ((2 + MLX5_EMPW_MIN_PACKETS + 3) / 4)))
- return MLX5_TXCMP_CODE_EXIT;
- part = (loc->wqe_free * 4) - 2;
- }
- if (likely(part > 1))
- rte_prefetch0(*pkts);
- loc->wqe_last = txq->wqes + (txq->wqe_ci & txq->wqe_m);
- /*
- * Build eMPW title WQEBB:
- * - Control Segment, eMPW opcode
- * - Ethernet Segment, no inline
- */
- mlx5_tx_cseg_init(txq, loc, loc->wqe_last, part + 2,
- MLX5_OPCODE_ENHANCED_MPSW, olx);
- mlx5_tx_eseg_none(txq, loc, loc->wqe_last,
- olx & ~MLX5_TXOFF_CONFIG_VLAN);
- eseg = &loc->wqe_last->eseg;
- dseg = &loc->wqe_last->dseg[0];
- loop = part;
- /* Store the packet length for legacy MPW. */
- if (MLX5_TXOFF_CONFIG(MPW))
- eseg->mss = rte_cpu_to_be_16
- (rte_pktmbuf_data_len(loc->mbuf));
- for (;;) {
- uint32_t dlen = rte_pktmbuf_data_len(loc->mbuf);
-#ifdef MLX5_PMD_SOFT_COUNTERS
- /* Update sent data bytes counter. */
- slen += dlen;
-#endif
- mlx5_tx_dseg_ptr
- (txq, loc, dseg,
- rte_pktmbuf_mtod(loc->mbuf, uint8_t *),
- dlen, olx);
- if (unlikely(--loop == 0))
- break;
- loc->mbuf = *pkts++;
- if (likely(loop > 1))
- rte_prefetch0(*pkts);
- ret = mlx5_tx_able_to_empw(txq, loc, olx, true);
- /*
- * Unroll the completion code to avoid
- * returning variable value - it results in
- * unoptimized sequent checking in caller.
- */
- if (ret == MLX5_TXCMP_CODE_MULTI) {
- part -= loop;
- mlx5_tx_sdone_empw(txq, loc, part, slen, olx);
- if (unlikely(!loc->elts_free ||
- !loc->wqe_free))
- return MLX5_TXCMP_CODE_EXIT;
- return MLX5_TXCMP_CODE_MULTI;
- }
- MLX5_ASSERT(NB_SEGS(loc->mbuf) == 1);
- if (ret == MLX5_TXCMP_CODE_TSO) {
- part -= loop;
- mlx5_tx_sdone_empw(txq, loc, part, slen, olx);
- if (unlikely(!loc->elts_free ||
- !loc->wqe_free))
- return MLX5_TXCMP_CODE_EXIT;
- return MLX5_TXCMP_CODE_TSO;
- }
- if (ret == MLX5_TXCMP_CODE_SINGLE) {
- part -= loop;
- mlx5_tx_sdone_empw(txq, loc, part, slen, olx);
- if (unlikely(!loc->elts_free ||
- !loc->wqe_free))
- return MLX5_TXCMP_CODE_EXIT;
- return MLX5_TXCMP_CODE_SINGLE;
- }
- if (ret != MLX5_TXCMP_CODE_EMPW) {
- MLX5_ASSERT(false);
- part -= loop;
- mlx5_tx_sdone_empw(txq, loc, part, slen, olx);
- return MLX5_TXCMP_CODE_ERROR;
- }
- /*
- * Check whether packet parameters coincide
- * within assumed eMPW batch:
- * - check sum settings
- * - metadata value
- * - software parser settings
- * - packets length (legacy MPW only)
- * - scheduling is not required
- */
- if (!mlx5_tx_match_empw(txq, eseg, loc, dlen, olx)) {
- MLX5_ASSERT(loop);
- part -= loop;
- mlx5_tx_sdone_empw(txq, loc, part, slen, olx);
- if (unlikely(!loc->elts_free ||
- !loc->wqe_free))
- return MLX5_TXCMP_CODE_EXIT;
- pkts_n -= part;
- goto next_empw;
- }
- /* Packet attributes match, continue the same eMPW. */
- ++dseg;
- if ((uintptr_t)dseg >= (uintptr_t)txq->wqes_end)
- dseg = (struct mlx5_wqe_dseg *)txq->wqes;
- }
- /* eMPW is built successfully, update loop parameters. */
- MLX5_ASSERT(!loop);
- MLX5_ASSERT(pkts_n >= part);
-#ifdef MLX5_PMD_SOFT_COUNTERS
- /* Update sent data bytes counter. */
- txq->stats.obytes += slen;
-#endif
- loc->elts_free -= part;
- loc->pkts_sent += part;
- txq->wqe_ci += (2 + part + 3) / 4;
- loc->wqe_free -= (2 + part + 3) / 4;
- pkts_n -= part;
- if (unlikely(!pkts_n || !loc->elts_free || !loc->wqe_free))
- return MLX5_TXCMP_CODE_EXIT;
- loc->mbuf = *pkts++;
- ret = mlx5_tx_able_to_empw(txq, loc, olx, true);
- if (unlikely(ret != MLX5_TXCMP_CODE_EMPW))
- return ret;
- /* Continue sending eMPW batches. */
- }
- MLX5_ASSERT(false);
-}
-
-/**
- * The routine sends packets with MLX5_OPCODE_EMPW
- * with inlining, optionally supports VLAN insertion.
- */
-static __rte_always_inline enum mlx5_txcmp_code
-mlx5_tx_burst_empw_inline(struct mlx5_txq_data *__rte_restrict txq,
- struct rte_mbuf **__rte_restrict pkts,
- unsigned int pkts_n,
- struct mlx5_txq_local *__rte_restrict loc,
- unsigned int olx)
-{
- /*
- * Subroutine is the part of mlx5_tx_burst_single()
- * and sends single-segment packet with eMPW opcode
- * with data inlining.
- */
- MLX5_ASSERT(MLX5_TXOFF_CONFIG(INLINE));
- MLX5_ASSERT(MLX5_TXOFF_CONFIG(EMPW));
- MLX5_ASSERT(loc->elts_free && loc->wqe_free);
- MLX5_ASSERT(pkts_n > loc->pkts_sent);
- pkts += loc->pkts_sent + 1;
- pkts_n -= loc->pkts_sent;
- for (;;) {
- struct mlx5_wqe_dseg *__rte_restrict dseg;
- struct mlx5_wqe *__rte_restrict wqem;
- enum mlx5_txcmp_code ret;
- unsigned int room, part, nlim;
- unsigned int slen = 0;
-
- MLX5_ASSERT(NB_SEGS(loc->mbuf) == 1);
- if (MLX5_TXOFF_CONFIG(TXPP)) {
- enum mlx5_txcmp_code wret;
-
- /* Generate WAIT for scheduling if requested. */
- wret = mlx5_tx_schedule_send(txq, loc, olx);
- if (wret == MLX5_TXCMP_CODE_EXIT)
- return MLX5_TXCMP_CODE_EXIT;
- if (wret == MLX5_TXCMP_CODE_ERROR)
- return MLX5_TXCMP_CODE_ERROR;
- }
- /*
- * Limits the amount of packets in one WQE
- * to improve CQE latency generation.
- */
- nlim = RTE_MIN(pkts_n, MLX5_TXOFF_CONFIG(MPW) ?
- MLX5_MPW_INLINE_MAX_PACKETS :
- MLX5_EMPW_MAX_PACKETS);
- /* Check whether we have minimal amount WQEs */
- if (unlikely(loc->wqe_free <
- ((2 + MLX5_EMPW_MIN_PACKETS + 3) / 4)))
- return MLX5_TXCMP_CODE_EXIT;
- if (likely(pkts_n > 1))
- rte_prefetch0(*pkts);
- wqem = txq->wqes + (txq->wqe_ci & txq->wqe_m);
- /*
- * Build eMPW title WQEBB:
- * - Control Segment, eMPW opcode, zero DS
- * - Ethernet Segment, no inline
- */
- mlx5_tx_cseg_init(txq, loc, wqem, 0,
- MLX5_OPCODE_ENHANCED_MPSW, olx);
- mlx5_tx_eseg_none(txq, loc, wqem,
- olx & ~MLX5_TXOFF_CONFIG_VLAN);
- dseg = &wqem->dseg[0];
- /* Store the packet length for legacy MPW. */
- if (MLX5_TXOFF_CONFIG(MPW))
- wqem->eseg.mss = rte_cpu_to_be_16
- (rte_pktmbuf_data_len(loc->mbuf));
- room = RTE_MIN(MLX5_WQE_SIZE_MAX / MLX5_WQE_SIZE,
- loc->wqe_free) * MLX5_WQE_SIZE -
- MLX5_WQE_CSEG_SIZE -
- MLX5_WQE_ESEG_SIZE;
- /* Limit the room for legacy MPW sessions for performance. */
- if (MLX5_TXOFF_CONFIG(MPW))
- room = RTE_MIN(room,
- RTE_MAX(txq->inlen_empw +
- sizeof(dseg->bcount) +
- (MLX5_TXOFF_CONFIG(VLAN) ?
- sizeof(struct rte_vlan_hdr) : 0),
- MLX5_MPW_INLINE_MAX_PACKETS *
- MLX5_WQE_DSEG_SIZE));
- /* Build WQE till we have space, packets and resources. */
- part = room;
- for (;;) {
- uint32_t dlen = rte_pktmbuf_data_len(loc->mbuf);
- uint8_t *dptr = rte_pktmbuf_mtod(loc->mbuf, uint8_t *);
- unsigned int tlen;
-
- MLX5_ASSERT(room >= MLX5_WQE_DSEG_SIZE);
- MLX5_ASSERT((room % MLX5_WQE_DSEG_SIZE) == 0);
- MLX5_ASSERT((uintptr_t)dseg < (uintptr_t)txq->wqes_end);
- /*
- * Some Tx offloads may cause an error if
- * packet is not long enough, check against
- * assumed minimal length.
- */
- if (unlikely(dlen <= MLX5_ESEG_MIN_INLINE_SIZE)) {
- part -= room;
- if (unlikely(!part))
- return MLX5_TXCMP_CODE_ERROR;
- /*
- * We have some successfully built
- * packet Data Segments to send.
- */
- mlx5_tx_idone_empw(txq, loc, part,
- slen, wqem, olx);
- return MLX5_TXCMP_CODE_ERROR;
- }
- /* Inline or not inline - that's the Question. */
- if (dlen > txq->inlen_empw ||
- loc->mbuf->ol_flags & PKT_TX_DYNF_NOINLINE)
- goto pointer_empw;
- if (MLX5_TXOFF_CONFIG(MPW)) {
- if (dlen > txq->inlen_send)
- goto pointer_empw;
- tlen = dlen;
- if (part == room) {
- /* Open new inline MPW session. */
- tlen += sizeof(dseg->bcount);
- dseg->bcount = RTE_BE32(0);
- dseg = RTE_PTR_ADD
- (dseg, sizeof(dseg->bcount));
- } else {
- /*
- * No pointer and inline descriptor
- * intermix for legacy MPW sessions.
- */
- if (wqem->dseg[0].bcount)
- break;
- }
- } else {
- tlen = sizeof(dseg->bcount) + dlen;
- }
- /* Inline entire packet, optional VLAN insertion. */
- if (MLX5_TXOFF_CONFIG(VLAN) &&
- loc->mbuf->ol_flags & PKT_TX_VLAN_PKT) {
- /*
- * The packet length must be checked in
- * mlx5_tx_able_to_empw() and packet
- * fits into inline length guaranteed.
- */
- MLX5_ASSERT((dlen +
- sizeof(struct rte_vlan_hdr)) <=
- txq->inlen_empw);
- tlen += sizeof(struct rte_vlan_hdr);
- if (room < tlen)
- break;
- dseg = mlx5_tx_dseg_vlan(txq, loc, dseg,
- dptr, dlen, olx);
-#ifdef MLX5_PMD_SOFT_COUNTERS
- /* Update sent data bytes counter. */
- slen += sizeof(struct rte_vlan_hdr);
-#endif
- } else {
- if (room < tlen)
- break;
- dseg = mlx5_tx_dseg_empw(txq, loc, dseg,
- dptr, dlen, olx);
- }
- if (!MLX5_TXOFF_CONFIG(MPW))
- tlen = RTE_ALIGN(tlen, MLX5_WSEG_SIZE);
- MLX5_ASSERT(room >= tlen);
- room -= tlen;
- /*
- * Packet data are completely inline,
- * we can try to free the packet.
- */
- if (likely(loc->pkts_sent == loc->mbuf_free)) {
- /*
- * All the packets from the burst beginning
- * are inline, we can free mbufs directly
- * from the origin array on tx_burst exit().
- */
- loc->mbuf_free++;
- goto next_mbuf;
- }
- /*
- * In order no to call rte_pktmbuf_free_seg() here,
- * in the most inner loop (that might be very
- * expensive) we just save the mbuf in elts.
- */
- txq->elts[txq->elts_head++ & txq->elts_m] = loc->mbuf;
- loc->elts_free--;
- goto next_mbuf;
-pointer_empw:
- /*
- * No pointer and inline descriptor
- * intermix for legacy MPW sessions.
- */
- if (MLX5_TXOFF_CONFIG(MPW) &&
- part != room &&
- wqem->dseg[0].bcount == RTE_BE32(0))
- break;
- /*
- * Not inlinable VLAN packets are
- * proceeded outside of this routine.
- */
- MLX5_ASSERT(room >= MLX5_WQE_DSEG_SIZE);
- if (MLX5_TXOFF_CONFIG(VLAN))
- MLX5_ASSERT(!(loc->mbuf->ol_flags &
- PKT_TX_VLAN_PKT));
- mlx5_tx_dseg_ptr(txq, loc, dseg, dptr, dlen, olx);
- /* We have to store mbuf in elts.*/
- txq->elts[txq->elts_head++ & txq->elts_m] = loc->mbuf;
- loc->elts_free--;
- room -= MLX5_WQE_DSEG_SIZE;
- /* Ring buffer wraparound is checked at the loop end.*/
- ++dseg;
-next_mbuf:
-#ifdef MLX5_PMD_SOFT_COUNTERS
- /* Update sent data bytes counter. */
- slen += dlen;
-#endif
- loc->pkts_sent++;
- pkts_n--;
- if (unlikely(!pkts_n || !loc->elts_free)) {
- /*
- * We have no resources/packets to
- * continue build descriptors.
- */
- part -= room;
- mlx5_tx_idone_empw(txq, loc, part,
- slen, wqem, olx);
- return MLX5_TXCMP_CODE_EXIT;
- }
- loc->mbuf = *pkts++;
- if (likely(pkts_n > 1))
- rte_prefetch0(*pkts);
- ret = mlx5_tx_able_to_empw(txq, loc, olx, true);
- /*
- * Unroll the completion code to avoid
- * returning variable value - it results in
- * unoptimized sequent checking in caller.
- */
- if (ret == MLX5_TXCMP_CODE_MULTI) {
- part -= room;
- mlx5_tx_idone_empw(txq, loc, part,
- slen, wqem, olx);
- if (unlikely(!loc->elts_free ||
- !loc->wqe_free))
- return MLX5_TXCMP_CODE_EXIT;
- return MLX5_TXCMP_CODE_MULTI;
- }
- MLX5_ASSERT(NB_SEGS(loc->mbuf) == 1);
- if (ret == MLX5_TXCMP_CODE_TSO) {
- part -= room;
- mlx5_tx_idone_empw(txq, loc, part,
- slen, wqem, olx);
- if (unlikely(!loc->elts_free ||
- !loc->wqe_free))
- return MLX5_TXCMP_CODE_EXIT;
- return MLX5_TXCMP_CODE_TSO;
- }
- if (ret == MLX5_TXCMP_CODE_SINGLE) {
- part -= room;
- mlx5_tx_idone_empw(txq, loc, part,
- slen, wqem, olx);
- if (unlikely(!loc->elts_free ||
- !loc->wqe_free))
- return MLX5_TXCMP_CODE_EXIT;
- return MLX5_TXCMP_CODE_SINGLE;
- }
- if (ret != MLX5_TXCMP_CODE_EMPW) {
- MLX5_ASSERT(false);
- part -= room;
- mlx5_tx_idone_empw(txq, loc, part,
- slen, wqem, olx);
- return MLX5_TXCMP_CODE_ERROR;
- }
- /* Check if we have minimal room left. */
- nlim--;
- if (unlikely(!nlim || room < MLX5_WQE_DSEG_SIZE))
- break;
- /*
- * Check whether packet parameters coincide
- * within assumed eMPW batch:
- * - check sum settings
- * - metadata value
- * - software parser settings
- * - packets length (legacy MPW only)
- * - scheduling is not required
- */
- if (!mlx5_tx_match_empw(txq, &wqem->eseg,
- loc, dlen, olx))
- break;
- /* Packet attributes match, continue the same eMPW. */
- if ((uintptr_t)dseg >= (uintptr_t)txq->wqes_end)
- dseg = (struct mlx5_wqe_dseg *)txq->wqes;
- }
- /*
- * We get here to close an existing eMPW
- * session and start the new one.
- */
- MLX5_ASSERT(pkts_n);
- part -= room;
- if (unlikely(!part))
- return MLX5_TXCMP_CODE_EXIT;
- mlx5_tx_idone_empw(txq, loc, part, slen, wqem, olx);
- if (unlikely(!loc->elts_free ||
- !loc->wqe_free))
- return MLX5_TXCMP_CODE_EXIT;
- /* Continue the loop with new eMPW session. */
- }
- MLX5_ASSERT(false);
-}
-
-/**
- * The routine sends packets with ordinary MLX5_OPCODE_SEND.
- * Data inlining and VLAN insertion are supported.
- */
-static __rte_always_inline enum mlx5_txcmp_code
-mlx5_tx_burst_single_send(struct mlx5_txq_data *__rte_restrict txq,
- struct rte_mbuf **__rte_restrict pkts,
- unsigned int pkts_n,
- struct mlx5_txq_local *__rte_restrict loc,
- unsigned int olx)
-{
- /*
- * Subroutine is the part of mlx5_tx_burst_single()
- * and sends single-segment packet with SEND opcode.
- */
- MLX5_ASSERT(loc->elts_free && loc->wqe_free);
- MLX5_ASSERT(pkts_n > loc->pkts_sent);
- pkts += loc->pkts_sent + 1;
- pkts_n -= loc->pkts_sent;
- for (;;) {
- struct mlx5_wqe *__rte_restrict wqe;
- enum mlx5_txcmp_code ret;
-
- MLX5_ASSERT(NB_SEGS(loc->mbuf) == 1);
- if (MLX5_TXOFF_CONFIG(TXPP)) {
- enum mlx5_txcmp_code wret;
-
- /* Generate WAIT for scheduling if requested. */
- wret = mlx5_tx_schedule_send(txq, loc, olx);
- if (wret == MLX5_TXCMP_CODE_EXIT)
- return MLX5_TXCMP_CODE_EXIT;
- if (wret == MLX5_TXCMP_CODE_ERROR)
- return MLX5_TXCMP_CODE_ERROR;
- }
- if (MLX5_TXOFF_CONFIG(INLINE)) {
- unsigned int inlen, vlan = 0;
-
- inlen = rte_pktmbuf_data_len(loc->mbuf);
- if (MLX5_TXOFF_CONFIG(VLAN) &&
- loc->mbuf->ol_flags & PKT_TX_VLAN_PKT) {
- vlan = sizeof(struct rte_vlan_hdr);
- inlen += vlan;
- }
- /*
- * If inlining is enabled at configuration time
- * the limit must be not less than minimal size.
- * Otherwise we would do extra check for data
- * size to avoid crashes due to length overflow.
- */
- MLX5_ASSERT(txq->inlen_send >=
- MLX5_ESEG_MIN_INLINE_SIZE);
- if (inlen <= txq->inlen_send) {
- unsigned int seg_n, wqe_n;
-
- rte_prefetch0(rte_pktmbuf_mtod
- (loc->mbuf, uint8_t *));
- /* Check against minimal length. */
- if (inlen <= MLX5_ESEG_MIN_INLINE_SIZE)
- return MLX5_TXCMP_CODE_ERROR;
- if (loc->mbuf->ol_flags &
- PKT_TX_DYNF_NOINLINE) {
- /*
- * The hint flag not to inline packet
- * data is set. Check whether we can
- * follow the hint.
- */
- if ((!MLX5_TXOFF_CONFIG(EMPW) &&
- txq->inlen_mode) ||
- (MLX5_TXOFF_CONFIG(MPW) &&
- txq->inlen_mode)) {
- if (inlen <= txq->inlen_send)
- goto single_inline;
- /*
- * The hardware requires the
- * minimal inline data header.
- */
- goto single_min_inline;
- }
- if (MLX5_TXOFF_CONFIG(VLAN) &&
- vlan && !txq->vlan_en) {
- /*
- * We must insert VLAN tag
- * by software means.
- */
- goto single_part_inline;
- }
- goto single_no_inline;
- }
-single_inline:
- /*
- * Completely inlined packet data WQE:
- * - Control Segment, SEND opcode
- * - Ethernet Segment, no VLAN insertion
- * - Data inlined, VLAN optionally inserted
- * - Alignment to MLX5_WSEG_SIZE
- * Have to estimate amount of WQEBBs
- */
- seg_n = (inlen + 3 * MLX5_WSEG_SIZE -
- MLX5_ESEG_MIN_INLINE_SIZE +
- MLX5_WSEG_SIZE - 1) / MLX5_WSEG_SIZE;
- /* Check if there are enough WQEBBs. */
- wqe_n = (seg_n + 3) / 4;
- if (wqe_n > loc->wqe_free)
- return MLX5_TXCMP_CODE_EXIT;
- wqe = txq->wqes + (txq->wqe_ci & txq->wqe_m);
- loc->wqe_last = wqe;
- mlx5_tx_cseg_init(txq, loc, wqe, seg_n,
- MLX5_OPCODE_SEND, olx);
- mlx5_tx_eseg_data(txq, loc, wqe,
- vlan, inlen, 0, olx);
- txq->wqe_ci += wqe_n;
- loc->wqe_free -= wqe_n;
- /*
- * Packet data are completely inlined,
- * free the packet immediately.
- */
- rte_pktmbuf_free_seg(loc->mbuf);
- } else if ((!MLX5_TXOFF_CONFIG(EMPW) ||
- MLX5_TXOFF_CONFIG(MPW)) &&
- txq->inlen_mode) {
- /*
- * If minimal inlining is requested the eMPW
- * feature should be disabled due to data is
- * inlined into Ethernet Segment, which can
- * not contain inlined data for eMPW due to
- * segment shared for all packets.
- */
- struct mlx5_wqe_dseg *__rte_restrict dseg;
- unsigned int ds;
- uint8_t *dptr;
-
- /*
- * The inline-mode settings require
- * to inline the specified amount of
- * data bytes to the Ethernet Segment.
- * We should check the free space in
- * WQE ring buffer to inline partially.
- */
-single_min_inline:
- MLX5_ASSERT(txq->inlen_send >= txq->inlen_mode);
- MLX5_ASSERT(inlen > txq->inlen_mode);
- MLX5_ASSERT(txq->inlen_mode >=
- MLX5_ESEG_MIN_INLINE_SIZE);
- /*
- * Check whether there are enough free WQEBBs:
- * - Control Segment
- * - Ethernet Segment
- * - First Segment of inlined Ethernet data
- * - ... data continued ...
- * - Finishing Data Segment of pointer type
- */
- ds = (MLX5_WQE_CSEG_SIZE +
- MLX5_WQE_ESEG_SIZE +
- MLX5_WQE_DSEG_SIZE +
- txq->inlen_mode -
- MLX5_ESEG_MIN_INLINE_SIZE +
- MLX5_WQE_DSEG_SIZE +
- MLX5_WSEG_SIZE - 1) / MLX5_WSEG_SIZE;
- if (loc->wqe_free < ((ds + 3) / 4))
- return MLX5_TXCMP_CODE_EXIT;
- /*
- * Build the ordinary SEND WQE:
- * - Control Segment
- * - Ethernet Segment, inline inlen_mode bytes
- * - Data Segment of pointer type
- */
- wqe = txq->wqes + (txq->wqe_ci & txq->wqe_m);
- loc->wqe_last = wqe;
- mlx5_tx_cseg_init(txq, loc, wqe, ds,
- MLX5_OPCODE_SEND, olx);
- dseg = mlx5_tx_eseg_data(txq, loc, wqe, vlan,
- txq->inlen_mode,
- 0, olx);
- dptr = rte_pktmbuf_mtod(loc->mbuf, uint8_t *) +
- txq->inlen_mode - vlan;
- inlen -= txq->inlen_mode;
- mlx5_tx_dseg_ptr(txq, loc, dseg,
- dptr, inlen, olx);
- /*
- * WQE is built, update the loop parameters
- * and got to the next packet.
- */
- txq->wqe_ci += (ds + 3) / 4;
- loc->wqe_free -= (ds + 3) / 4;
- /* We have to store mbuf in elts.*/
- MLX5_ASSERT(MLX5_TXOFF_CONFIG(INLINE));
- txq->elts[txq->elts_head++ & txq->elts_m] =
- loc->mbuf;
- --loc->elts_free;
- } else {
- uint8_t *dptr;
- unsigned int dlen;
-
- /*
- * Partially inlined packet data WQE, we have
- * some space in title WQEBB, we can fill it
- * with some packet data. It takes one WQEBB,
- * it is available, no extra space check:
- * - Control Segment, SEND opcode
- * - Ethernet Segment, no VLAN insertion
- * - MLX5_ESEG_MIN_INLINE_SIZE bytes of Data
- * - Data Segment, pointer type
- *
- * We also get here if VLAN insertion is not
- * supported by HW, the inline is enabled.
- */
-single_part_inline:
- wqe = txq->wqes + (txq->wqe_ci & txq->wqe_m);
- loc->wqe_last = wqe;
- mlx5_tx_cseg_init(txq, loc, wqe, 4,
- MLX5_OPCODE_SEND, olx);
- mlx5_tx_eseg_dmin(txq, loc, wqe, vlan, olx);
- dptr = rte_pktmbuf_mtod(loc->mbuf, uint8_t *) +
- MLX5_ESEG_MIN_INLINE_SIZE - vlan;
- /*
- * The length check is performed above, by
- * comparing with txq->inlen_send. We should
- * not get overflow here.
- */
- MLX5_ASSERT(inlen > MLX5_ESEG_MIN_INLINE_SIZE);
- dlen = inlen - MLX5_ESEG_MIN_INLINE_SIZE;
- mlx5_tx_dseg_ptr(txq, loc, &wqe->dseg[1],
- dptr, dlen, olx);
- ++txq->wqe_ci;
- --loc->wqe_free;
- /* We have to store mbuf in elts.*/
- MLX5_ASSERT(MLX5_TXOFF_CONFIG(INLINE));
- txq->elts[txq->elts_head++ & txq->elts_m] =
- loc->mbuf;
- --loc->elts_free;
- }
-#ifdef MLX5_PMD_SOFT_COUNTERS
- /* Update sent data bytes counter. */
- txq->stats.obytes += vlan +
- rte_pktmbuf_data_len(loc->mbuf);
-#endif
- } else {
- /*
- * No inline at all, it means the CPU cycles saving
- * is prioritized at configuration, we should not
- * copy any packet data to WQE.
- *
- * SEND WQE, one WQEBB:
- * - Control Segment, SEND opcode
- * - Ethernet Segment, optional VLAN, no inline
- * - Data Segment, pointer type
- */
-single_no_inline:
- wqe = txq->wqes + (txq->wqe_ci & txq->wqe_m);
- loc->wqe_last = wqe;
- mlx5_tx_cseg_init(txq, loc, wqe, 3,
- MLX5_OPCODE_SEND, olx);
- mlx5_tx_eseg_none(txq, loc, wqe, olx);
- mlx5_tx_dseg_ptr
- (txq, loc, &wqe->dseg[0],
- rte_pktmbuf_mtod(loc->mbuf, uint8_t *),
- rte_pktmbuf_data_len(loc->mbuf), olx);
- ++txq->wqe_ci;
- --loc->wqe_free;
- /*
- * We should not store mbuf pointer in elts
- * if no inlining is configured, this is done
- * by calling routine in a batch copy.
- */
- MLX5_ASSERT(!MLX5_TXOFF_CONFIG(INLINE));
- --loc->elts_free;
-#ifdef MLX5_PMD_SOFT_COUNTERS
- /* Update sent data bytes counter. */
- txq->stats.obytes += rte_pktmbuf_data_len(loc->mbuf);
- if (MLX5_TXOFF_CONFIG(VLAN) &&
- loc->mbuf->ol_flags & PKT_TX_VLAN_PKT)
- txq->stats.obytes +=
- sizeof(struct rte_vlan_hdr);
-#endif
- }
- ++loc->pkts_sent;
- --pkts_n;
- if (unlikely(!pkts_n || !loc->elts_free || !loc->wqe_free))
- return MLX5_TXCMP_CODE_EXIT;
- loc->mbuf = *pkts++;
- if (pkts_n > 1)
- rte_prefetch0(*pkts);
- ret = mlx5_tx_able_to_empw(txq, loc, olx, true);
- if (unlikely(ret != MLX5_TXCMP_CODE_SINGLE))
- return ret;
- }
- MLX5_ASSERT(false);
-}
-
-static __rte_always_inline enum mlx5_txcmp_code
-mlx5_tx_burst_single(struct mlx5_txq_data *__rte_restrict txq,
- struct rte_mbuf **__rte_restrict pkts,
- unsigned int pkts_n,
- struct mlx5_txq_local *__rte_restrict loc,
- unsigned int olx)
-{
- enum mlx5_txcmp_code ret;
-
- ret = mlx5_tx_able_to_empw(txq, loc, olx, false);
- if (ret == MLX5_TXCMP_CODE_SINGLE)
- goto ordinary_send;
- MLX5_ASSERT(ret == MLX5_TXCMP_CODE_EMPW);
- for (;;) {
- /* Optimize for inline/no inline eMPW send. */
- ret = (MLX5_TXOFF_CONFIG(INLINE)) ?
- mlx5_tx_burst_empw_inline
- (txq, pkts, pkts_n, loc, olx) :
- mlx5_tx_burst_empw_simple
- (txq, pkts, pkts_n, loc, olx);
- if (ret != MLX5_TXCMP_CODE_SINGLE)
- return ret;
- /* The resources to send one packet should remain. */
- MLX5_ASSERT(loc->elts_free && loc->wqe_free);
-ordinary_send:
- ret = mlx5_tx_burst_single_send(txq, pkts, pkts_n, loc, olx);
- MLX5_ASSERT(ret != MLX5_TXCMP_CODE_SINGLE);
- if (ret != MLX5_TXCMP_CODE_EMPW)
- return ret;
- /* The resources to send one packet should remain. */
- MLX5_ASSERT(loc->elts_free && loc->wqe_free);
- }
-}
-
-/**
- * DPDK Tx callback template. This is configured template
- * used to generate routines optimized for specified offload setup.
- * One of this generated functions is chosen at SQ configuration
- * time.
- *
- * @param txq
- * Generic pointer to TX queue structure.
- * @param[in] pkts
- * Packets to transmit.
- * @param pkts_n
- * Number of packets in array.
- * @param olx
- * Configured offloads mask, presents the bits of MLX5_TXOFF_CONFIG_xxx
- * values. Should be static to take compile time static configuration
- * advantages.
- *
- * @return
- * Number of packets successfully transmitted (<= pkts_n).
- */
-static __rte_always_inline uint16_t
-mlx5_tx_burst_tmpl(struct mlx5_txq_data *__rte_restrict txq,
- struct rte_mbuf **__rte_restrict pkts,
- uint16_t pkts_n,
- unsigned int olx)
-{
- struct mlx5_txq_local loc;
- enum mlx5_txcmp_code ret;
- unsigned int part;
-
- MLX5_ASSERT(txq->elts_s >= (uint16_t)(txq->elts_head - txq->elts_tail));
- MLX5_ASSERT(txq->wqe_s >= (uint16_t)(txq->wqe_ci - txq->wqe_pi));
- if (unlikely(!pkts_n))
- return 0;
- if (MLX5_TXOFF_CONFIG(INLINE))
- loc.mbuf_free = 0;
- loc.pkts_sent = 0;
- loc.pkts_copy = 0;
- loc.wqe_last = NULL;
-
-send_loop:
- loc.pkts_loop = loc.pkts_sent;
- /*
- * Check if there are some CQEs, if any:
- * - process an encountered errors
- * - process the completed WQEs
- * - free related mbufs
- * - doorbell the NIC about processed CQEs
- */
- rte_prefetch0(*(pkts + loc.pkts_sent));
- mlx5_tx_handle_completion(txq, olx);
- /*
- * Calculate the number of available resources - elts and WQEs.
- * There are two possible different scenarios:
- * - no data inlining into WQEs, one WQEBB may contains up to
- * four packets, in this case elts become scarce resource
- * - data inlining into WQEs, one packet may require multiple
- * WQEBBs, the WQEs become the limiting factor.
- */
- MLX5_ASSERT(txq->elts_s >= (uint16_t)(txq->elts_head - txq->elts_tail));
- loc.elts_free = txq->elts_s -
- (uint16_t)(txq->elts_head - txq->elts_tail);
- MLX5_ASSERT(txq->wqe_s >= (uint16_t)(txq->wqe_ci - txq->wqe_pi));
- loc.wqe_free = txq->wqe_s -
- (uint16_t)(txq->wqe_ci - txq->wqe_pi);
- if (unlikely(!loc.elts_free || !loc.wqe_free))
- goto burst_exit;
- for (;;) {
- /*
- * Fetch the packet from array. Usually this is
- * the first packet in series of multi/single
- * segment packets.
- */
- loc.mbuf = *(pkts + loc.pkts_sent);
- /* Dedicated branch for multi-segment packets. */
- if (MLX5_TXOFF_CONFIG(MULTI) &&
- unlikely(NB_SEGS(loc.mbuf) > 1)) {
- /*
- * Multi-segment packet encountered.
- * Hardware is able to process it only
- * with SEND/TSO opcodes, one packet
- * per WQE, do it in dedicated routine.
- */
-enter_send_multi:
- MLX5_ASSERT(loc.pkts_sent >= loc.pkts_copy);
- part = loc.pkts_sent - loc.pkts_copy;
- if (!MLX5_TXOFF_CONFIG(INLINE) && part) {
- /*
- * There are some single-segment mbufs not
- * stored in elts. The mbufs must be in the
- * same order as WQEs, so we must copy the
- * mbufs to elts here, before the coming
- * multi-segment packet mbufs is appended.
- */
- mlx5_tx_copy_elts(txq, pkts + loc.pkts_copy,
- part, olx);
- loc.pkts_copy = loc.pkts_sent;
- }
- MLX5_ASSERT(pkts_n > loc.pkts_sent);
- ret = mlx5_tx_burst_mseg(txq, pkts, pkts_n, &loc, olx);
- if (!MLX5_TXOFF_CONFIG(INLINE))
- loc.pkts_copy = loc.pkts_sent;
- /*
- * These returned code checks are supposed
- * to be optimized out due to routine inlining.
- */
- if (ret == MLX5_TXCMP_CODE_EXIT) {
- /*
- * The routine returns this code when
- * all packets are sent or there is no
- * enough resources to complete request.
- */
- break;
- }
- if (ret == MLX5_TXCMP_CODE_ERROR) {
- /*
- * The routine returns this code when
- * some error in the incoming packets
- * format occurred.
- */
- txq->stats.oerrors++;
- break;
- }
- if (ret == MLX5_TXCMP_CODE_SINGLE) {
- /*
- * The single-segment packet was encountered
- * in the array, try to send it with the
- * best optimized way, possible engaging eMPW.
- */
- goto enter_send_single;
- }
- if (MLX5_TXOFF_CONFIG(TSO) &&
- ret == MLX5_TXCMP_CODE_TSO) {
- /*
- * The single-segment TSO packet was
- * encountered in the array.
- */
- goto enter_send_tso;
- }
- /* We must not get here. Something is going wrong. */
- MLX5_ASSERT(false);
- txq->stats.oerrors++;
- break;
- }
- /* Dedicated branch for single-segment TSO packets. */
- if (MLX5_TXOFF_CONFIG(TSO) &&
- unlikely(loc.mbuf->ol_flags & PKT_TX_TCP_SEG)) {
- /*
- * TSO might require special way for inlining
- * (dedicated parameters) and is sent with
- * MLX5_OPCODE_TSO opcode only, provide this
- * in dedicated branch.
- */
-enter_send_tso:
- MLX5_ASSERT(NB_SEGS(loc.mbuf) == 1);
- MLX5_ASSERT(pkts_n > loc.pkts_sent);
- ret = mlx5_tx_burst_tso(txq, pkts, pkts_n, &loc, olx);
- /*
- * These returned code checks are supposed
- * to be optimized out due to routine inlining.
- */
- if (ret == MLX5_TXCMP_CODE_EXIT)
- break;
- if (ret == MLX5_TXCMP_CODE_ERROR) {
- txq->stats.oerrors++;
- break;
- }
- if (ret == MLX5_TXCMP_CODE_SINGLE)
- goto enter_send_single;
- if (MLX5_TXOFF_CONFIG(MULTI) &&
- ret == MLX5_TXCMP_CODE_MULTI) {
- /*
- * The multi-segment packet was
- * encountered in the array.
- */
- goto enter_send_multi;
- }
- /* We must not get here. Something is going wrong. */
- MLX5_ASSERT(false);
- txq->stats.oerrors++;
- break;
- }
- /*
- * The dedicated branch for the single-segment packets
- * without TSO. Often these ones can be sent using
- * MLX5_OPCODE_EMPW with multiple packets in one WQE.
- * The routine builds the WQEs till it encounters
- * the TSO or multi-segment packet (in case if these
- * offloads are requested at SQ configuration time).
- */
-enter_send_single:
- MLX5_ASSERT(pkts_n > loc.pkts_sent);
- ret = mlx5_tx_burst_single(txq, pkts, pkts_n, &loc, olx);
- /*
- * These returned code checks are supposed
- * to be optimized out due to routine inlining.
- */
- if (ret == MLX5_TXCMP_CODE_EXIT)
- break;
- if (ret == MLX5_TXCMP_CODE_ERROR) {
- txq->stats.oerrors++;
- break;
- }
- if (MLX5_TXOFF_CONFIG(MULTI) &&
- ret == MLX5_TXCMP_CODE_MULTI) {
- /*
- * The multi-segment packet was
- * encountered in the array.
- */
- goto enter_send_multi;
- }
- if (MLX5_TXOFF_CONFIG(TSO) &&
- ret == MLX5_TXCMP_CODE_TSO) {
- /*
- * The single-segment TSO packet was
- * encountered in the array.
- */
- goto enter_send_tso;
- }
- /* We must not get here. Something is going wrong. */
- MLX5_ASSERT(false);
- txq->stats.oerrors++;
- break;
- }
- /*
- * Main Tx loop is completed, do the rest:
- * - set completion request if thresholds are reached
- * - doorbell the hardware
- * - copy the rest of mbufs to elts (if any)
- */
- MLX5_ASSERT(MLX5_TXOFF_CONFIG(INLINE) ||
- loc.pkts_sent >= loc.pkts_copy);
- /* Take a shortcut if nothing is sent. */
- if (unlikely(loc.pkts_sent == loc.pkts_loop))
- goto burst_exit;
- /* Request CQE generation if limits are reached. */
- mlx5_tx_request_completion(txq, &loc, olx);
- /*
- * Ring QP doorbell immediately after WQE building completion
- * to improve latencies. The pure software related data treatment
- * can be completed after doorbell. Tx CQEs for this SQ are
- * processed in this thread only by the polling.
- *
- * The rdma core library can map doorbell register in two ways,
- * depending on the environment variable "MLX5_SHUT_UP_BF":
- *
- * - as regular cached memory, the variable is either missing or
- * set to zero. This type of mapping may cause the significant
- * doorbell register writing latency and requires explicit
- * memory write barrier to mitigate this issue and prevent
- * write combining.
- *
- * - as non-cached memory, the variable is present and set to
- * not "0" value. This type of mapping may cause performance
- * impact under heavy loading conditions but the explicit write
- * memory barrier is not required and it may improve core
- * performance.
- *
- * - the legacy behaviour (prior 19.08 release) was to use some
- * heuristics to decide whether write memory barrier should
- * be performed. This behavior is supported with specifying
- * tx_db_nc=2, write barrier is skipped if application
- * provides the full recommended burst of packets, it
- * supposes the next packets are coming and the write barrier
- * will be issued on the next burst (after descriptor writing,
- * at least).
- */
- mlx5_tx_dbrec_cond_wmb(txq, loc.wqe_last, !txq->db_nc &&
- (!txq->db_heu || pkts_n % MLX5_TX_DEFAULT_BURST));
- /* Not all of the mbufs may be stored into elts yet. */
- part = MLX5_TXOFF_CONFIG(INLINE) ? 0 : loc.pkts_sent - loc.pkts_copy;
- if (!MLX5_TXOFF_CONFIG(INLINE) && part) {
- /*
- * There are some single-segment mbufs not stored in elts.
- * It can be only if the last packet was single-segment.
- * The copying is gathered into one place due to it is
- * a good opportunity to optimize that with SIMD.
- * Unfortunately if inlining is enabled the gaps in
- * pointer array may happen due to early freeing of the
- * inlined mbufs.
- */
- mlx5_tx_copy_elts(txq, pkts + loc.pkts_copy, part, olx);
- loc.pkts_copy = loc.pkts_sent;
- }
- MLX5_ASSERT(txq->elts_s >= (uint16_t)(txq->elts_head - txq->elts_tail));
- MLX5_ASSERT(txq->wqe_s >= (uint16_t)(txq->wqe_ci - txq->wqe_pi));
- if (pkts_n > loc.pkts_sent) {
- /*
- * If burst size is large there might be no enough CQE
- * fetched from completion queue and no enough resources
- * freed to send all the packets.
- */
- goto send_loop;
- }
-burst_exit:
-#ifdef MLX5_PMD_SOFT_COUNTERS
- /* Increment sent packets counter. */
- txq->stats.opackets += loc.pkts_sent;
-#endif
- if (MLX5_TXOFF_CONFIG(INLINE) && loc.mbuf_free)
- __mlx5_tx_free_mbuf(txq, pkts, loc.mbuf_free, olx);
- return loc.pkts_sent;
-}
-
/* Generate routines with Enhanced Multi-Packet Write support. */
MLX5_TXOFF_DECL(full_empw,
MLX5_TXOFF_CONFIG_FULL | MLX5_TXOFF_CONFIG_EMPW)
diff --git a/drivers/net/mlx5/mlx5_tx.h b/drivers/net/mlx5/mlx5_tx.h
index 7f91d04..34843d4 100644
--- a/drivers/net/mlx5/mlx5_tx.h
+++ b/drivers/net/mlx5/mlx5_tx.h
@@ -20,8 +20,64 @@
#include "mlx5_autoconf.h"
#include "mlx5_mr.h"
+/* TX burst subroutines return codes. */
+enum mlx5_txcmp_code {
+ MLX5_TXCMP_CODE_EXIT = 0,
+ MLX5_TXCMP_CODE_ERROR,
+ MLX5_TXCMP_CODE_SINGLE,
+ MLX5_TXCMP_CODE_MULTI,
+ MLX5_TXCMP_CODE_TSO,
+ MLX5_TXCMP_CODE_EMPW,
+};
+
+/*
+ * These defines are used to configure Tx burst routine option set supported
+ * at compile time. The not specified options are optimized out due to if
+ * conditions can be explicitly calculated at compile time.
+ * The offloads with bigger runtime check (require more CPU cycles toskip)
+ * overhead should have the bigger index - this is needed to select the better
+ * matching routine function if no exact match and some offloads are not
+ * actually requested.
+ */
+#define MLX5_TXOFF_CONFIG_MULTI (1u << 0) /* Multi-segment packets.*/
+#define MLX5_TXOFF_CONFIG_TSO (1u << 1) /* TCP send offload supported.*/
+#define MLX5_TXOFF_CONFIG_SWP (1u << 2) /* Tunnels/SW Parser offloads.*/
+#define MLX5_TXOFF_CONFIG_CSUM (1u << 3) /* Check Sums offloaded. */
+#define MLX5_TXOFF_CONFIG_INLINE (1u << 4) /* Data inlining supported. */
+#define MLX5_TXOFF_CONFIG_VLAN (1u << 5) /* VLAN insertion supported.*/
+#define MLX5_TXOFF_CONFIG_METADATA (1u << 6) /* Flow metadata. */
+#define MLX5_TXOFF_CONFIG_EMPW (1u << 8) /* Enhanced MPW supported.*/
+#define MLX5_TXOFF_CONFIG_MPW (1u << 9) /* Legacy MPW supported.*/
+#define MLX5_TXOFF_CONFIG_TXPP (1u << 10) /* Scheduling on timestamp.*/
+
+/* The most common offloads groups. */
+#define MLX5_TXOFF_CONFIG_NONE 0
+#define MLX5_TXOFF_CONFIG_FULL (MLX5_TXOFF_CONFIG_MULTI | \
+ MLX5_TXOFF_CONFIG_TSO | \
+ MLX5_TXOFF_CONFIG_SWP | \
+ MLX5_TXOFF_CONFIG_CSUM | \
+ MLX5_TXOFF_CONFIG_INLINE | \
+ MLX5_TXOFF_CONFIG_VLAN | \
+ MLX5_TXOFF_CONFIG_METADATA)
+
+#define MLX5_TXOFF_CONFIG(mask) (olx & MLX5_TXOFF_CONFIG_##mask)
+
+#define MLX5_TXOFF_DECL(func, olx) \
+static uint16_t mlx5_tx_burst_##func(void *txq, \
+ struct rte_mbuf **pkts, \
+ uint16_t pkts_n) \
+{ \
+ return mlx5_tx_burst_tmpl((struct mlx5_txq_data *)txq, \
+ pkts, pkts_n, (olx)); \
+}
+
/* Mbuf dynamic flag offset for inline. */
extern uint64_t rte_net_mlx5_dynf_inline_mask;
+#define PKT_TX_DYNF_NOINLINE rte_net_mlx5_dynf_inline_mask
+
+extern uint32_t mlx5_ptype_table[] __rte_cache_aligned;
+extern uint8_t mlx5_cksum_table[1 << 10] __rte_cache_aligned;
+extern uint8_t mlx5_swp_types_table[1 << 10] __rte_cache_aligned;
struct mlx5_txq_stats {
#ifdef MLX5_PMD_SOFT_COUNTERS
@@ -167,6 +223,8 @@ struct mlx5_txq_ctrl *mlx5_txq_hairpin_new
uint16_t removed_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts,
uint16_t pkts_n);
+void mlx5_tx_handle_completion(struct mlx5_txq_data *__rte_restrict txq,
+ unsigned int olx __rte_unused);
int mlx5_tx_descriptor_status(void *tx_queue, uint16_t offset);
void mlx5_txq_info_get(struct rte_eth_dev *dev, uint16_t queue_id,
struct rte_eth_txq_info *qinfo);
@@ -368,4 +426,3250 @@ uint32_t mlx5_tx_update_ext_mp(struct mlx5_txq_data *txq, uintptr_t addr,
return ci;
}
+/**
+ * Set Software Parser flags and offsets in Ethernet Segment of WQE.
+ * Flags must be preliminary initialized to zero.
+ *
+ * @param loc
+ * Pointer to burst routine local context.
+ * @param swp_flags
+ * Pointer to store Software Parser flags.
+ * @param olx
+ * Configured Tx offloads mask. It is fully defined at
+ * compile time and may be used for optimization.
+ *
+ * @return
+ * Software Parser offsets packed in dword.
+ * Software Parser flags are set by pointer.
+ */
+static __rte_always_inline uint32_t
+txq_mbuf_to_swp(struct mlx5_txq_local *__rte_restrict loc,
+ uint8_t *swp_flags,
+ unsigned int olx)
+{
+ uint64_t ol, tunnel;
+ unsigned int idx, off;
+ uint32_t set;
+
+ if (!MLX5_TXOFF_CONFIG(SWP))
+ return 0;
+ ol = loc->mbuf->ol_flags;
+ tunnel = ol & PKT_TX_TUNNEL_MASK;
+ /*
+ * Check whether Software Parser is required.
+ * Only customized tunnels may ask for.
+ */
+ if (likely(tunnel != PKT_TX_TUNNEL_UDP && tunnel != PKT_TX_TUNNEL_IP))
+ return 0;
+ /*
+ * The index should have:
+ * bit[0:1] = PKT_TX_L4_MASK
+ * bit[4] = PKT_TX_IPV6
+ * bit[8] = PKT_TX_OUTER_IPV6
+ * bit[9] = PKT_TX_OUTER_UDP
+ */
+ idx = (ol & (PKT_TX_L4_MASK | PKT_TX_IPV6 | PKT_TX_OUTER_IPV6)) >> 52;
+ idx |= (tunnel == PKT_TX_TUNNEL_UDP) ? (1 << 9) : 0;
+ *swp_flags = mlx5_swp_types_table[idx];
+ /*
+ * Set offsets for SW parser. Since ConnectX-5, SW parser just
+ * complements HW parser. SW parser starts to engage only if HW parser
+ * can't reach a header. For the older devices, HW parser will not kick
+ * in if any of SWP offsets is set. Therefore, all of the L3 offsets
+ * should be set regardless of HW offload.
+ */
+ off = loc->mbuf->outer_l2_len;
+ if (MLX5_TXOFF_CONFIG(VLAN) && ol & PKT_TX_VLAN_PKT)
+ off += sizeof(struct rte_vlan_hdr);
+ set = (off >> 1) << 8; /* Outer L3 offset. */
+ off += loc->mbuf->outer_l3_len;
+ if (tunnel == PKT_TX_TUNNEL_UDP)
+ set |= off >> 1; /* Outer L4 offset. */
+ if (ol & (PKT_TX_IPV4 | PKT_TX_IPV6)) { /* Inner IP. */
+ const uint64_t csum = ol & PKT_TX_L4_MASK;
+ off += loc->mbuf->l2_len;
+ set |= (off >> 1) << 24; /* Inner L3 offset. */
+ if (csum == PKT_TX_TCP_CKSUM ||
+ csum == PKT_TX_UDP_CKSUM ||
+ (MLX5_TXOFF_CONFIG(TSO) && ol & PKT_TX_TCP_SEG)) {
+ off += loc->mbuf->l3_len;
+ set |= (off >> 1) << 16; /* Inner L4 offset. */
+ }
+ }
+ set = rte_cpu_to_le_32(set);
+ return set;
+}
+
+/**
+ * Convert the Checksum offloads to Verbs.
+ *
+ * @param buf
+ * Pointer to the mbuf.
+ *
+ * @return
+ * Converted checksum flags.
+ */
+static __rte_always_inline uint8_t
+txq_ol_cksum_to_cs(struct rte_mbuf *buf)
+{
+ uint32_t idx;
+ uint8_t is_tunnel = !!(buf->ol_flags & PKT_TX_TUNNEL_MASK);
+ const uint64_t ol_flags_mask = PKT_TX_TCP_SEG | PKT_TX_L4_MASK |
+ PKT_TX_IP_CKSUM | PKT_TX_OUTER_IP_CKSUM;
+
+ /*
+ * The index should have:
+ * bit[0] = PKT_TX_TCP_SEG
+ * bit[2:3] = PKT_TX_UDP_CKSUM, PKT_TX_TCP_CKSUM
+ * bit[4] = PKT_TX_IP_CKSUM
+ * bit[8] = PKT_TX_OUTER_IP_CKSUM
+ * bit[9] = tunnel
+ */
+ idx = ((buf->ol_flags & ol_flags_mask) >> 50) | (!!is_tunnel << 9);
+ return mlx5_cksum_table[idx];
+}
+
+/**
+ * Free the mbufs from the linear array of pointers.
+ *
+ * @param txq
+ * Pointer to Tx queue structure.
+ * @param pkts
+ * Pointer to array of packets to be free.
+ * @param pkts_n
+ * Number of packets to be freed.
+ * @param olx
+ * Configured Tx offloads mask. It is fully defined at
+ * compile time and may be used for optimization.
+ */
+static __rte_always_inline void
+mlx5_tx_free_mbuf(struct mlx5_txq_data *__rte_restrict txq,
+ struct rte_mbuf **__rte_restrict pkts,
+ unsigned int pkts_n,
+ unsigned int olx __rte_unused)
+{
+ struct rte_mempool *pool = NULL;
+ struct rte_mbuf **p_free = NULL;
+ struct rte_mbuf *mbuf;
+ unsigned int n_free = 0;
+
+ /*
+ * The implemented algorithm eliminates
+ * copying pointers to temporary array
+ * for rte_mempool_put_bulk() calls.
+ */
+ MLX5_ASSERT(pkts);
+ MLX5_ASSERT(pkts_n);
+ /*
+ * Free mbufs directly to the pool in bulk
+ * if fast free offload is engaged
+ */
+ if (!MLX5_TXOFF_CONFIG(MULTI) && txq->fast_free) {
+ mbuf = *pkts;
+ pool = mbuf->pool;
+ rte_mempool_put_bulk(pool, (void *)pkts, pkts_n);
+ return;
+ }
+ for (;;) {
+ for (;;) {
+ /*
+ * Decrement mbuf reference counter, detach
+ * indirect and external buffers if needed.
+ */
+ mbuf = rte_pktmbuf_prefree_seg(*pkts);
+ if (likely(mbuf != NULL)) {
+ MLX5_ASSERT(mbuf == *pkts);
+ if (likely(n_free != 0)) {
+ if (unlikely(pool != mbuf->pool))
+ /* From different pool. */
+ break;
+ } else {
+ /* Start new scan array. */
+ pool = mbuf->pool;
+ p_free = pkts;
+ }
+ ++n_free;
+ ++pkts;
+ --pkts_n;
+ if (unlikely(pkts_n == 0)) {
+ mbuf = NULL;
+ break;
+ }
+ } else {
+ /*
+ * This happens if mbuf is still referenced.
+ * We can't put it back to the pool, skip.
+ */
+ ++pkts;
+ --pkts_n;
+ if (unlikely(n_free != 0))
+ /* There is some array to free.*/
+ break;
+ if (unlikely(pkts_n == 0))
+ /* Last mbuf, nothing to free. */
+ return;
+ }
+ }
+ for (;;) {
+ /*
+ * This loop is implemented to avoid multiple
+ * inlining of rte_mempool_put_bulk().
+ */
+ MLX5_ASSERT(pool);
+ MLX5_ASSERT(p_free);
+ MLX5_ASSERT(n_free);
+ /*
+ * Free the array of pre-freed mbufs
+ * belonging to the same memory pool.
+ */
+ rte_mempool_put_bulk(pool, (void *)p_free, n_free);
+ if (unlikely(mbuf != NULL)) {
+ /* There is the request to start new scan. */
+ pool = mbuf->pool;
+ p_free = pkts++;
+ n_free = 1;
+ --pkts_n;
+ if (likely(pkts_n != 0))
+ break;
+ /*
+ * This is the last mbuf to be freed.
+ * Do one more loop iteration to complete.
+ * This is rare case of the last unique mbuf.
+ */
+ mbuf = NULL;
+ continue;
+ }
+ if (likely(pkts_n == 0))
+ return;
+ n_free = 0;
+ break;
+ }
+ }
+}
+
+/**
+ * No inline version to free buffers for optimal call
+ * on the tx_burst completion.
+ */
+static __rte_noinline void
+__mlx5_tx_free_mbuf(struct mlx5_txq_data *__rte_restrict txq,
+ struct rte_mbuf **__rte_restrict pkts,
+ unsigned int pkts_n,
+ unsigned int olx __rte_unused)
+{
+ mlx5_tx_free_mbuf(txq, pkts, pkts_n, olx);
+}
+
+/**
+ * Free the mbuf from the elts ring buffer till new tail.
+ *
+ * @param txq
+ * Pointer to Tx queue structure.
+ * @param tail
+ * Index in elts to free up to, becomes new elts tail.
+ * @param olx
+ * Configured Tx offloads mask. It is fully defined at
+ * compile time and may be used for optimization.
+ */
+static __rte_always_inline void
+mlx5_tx_free_elts(struct mlx5_txq_data *__rte_restrict txq,
+ uint16_t tail,
+ unsigned int olx __rte_unused)
+{
+ uint16_t n_elts = tail - txq->elts_tail;
+
+ MLX5_ASSERT(n_elts);
+ MLX5_ASSERT(n_elts <= txq->elts_s);
+ /*
+ * Implement a loop to support ring buffer wraparound
+ * with single inlining of mlx5_tx_free_mbuf().
+ */
+ do {
+ unsigned int part;
+
+ part = txq->elts_s - (txq->elts_tail & txq->elts_m);
+ part = RTE_MIN(part, n_elts);
+ MLX5_ASSERT(part);
+ MLX5_ASSERT(part <= txq->elts_s);
+ mlx5_tx_free_mbuf(txq,
+ &txq->elts[txq->elts_tail & txq->elts_m],
+ part, olx);
+ txq->elts_tail += part;
+ n_elts -= part;
+ } while (n_elts);
+}
+
+/**
+ * Store the mbuf being sent into elts ring buffer.
+ * On Tx completion these mbufs will be freed.
+ *
+ * @param txq
+ * Pointer to Tx queue structure.
+ * @param pkts
+ * Pointer to array of packets to be stored.
+ * @param pkts_n
+ * Number of packets to be stored.
+ * @param olx
+ * Configured Tx offloads mask. It is fully defined at
+ * compile time and may be used for optimization.
+ */
+static __rte_always_inline void
+mlx5_tx_copy_elts(struct mlx5_txq_data *__rte_restrict txq,
+ struct rte_mbuf **__rte_restrict pkts,
+ unsigned int pkts_n,
+ unsigned int olx __rte_unused)
+{
+ unsigned int part;
+ struct rte_mbuf **elts = (struct rte_mbuf **)txq->elts;
+
+ MLX5_ASSERT(pkts);
+ MLX5_ASSERT(pkts_n);
+ part = txq->elts_s - (txq->elts_head & txq->elts_m);
+ MLX5_ASSERT(part);
+ MLX5_ASSERT(part <= txq->elts_s);
+ /* This code is a good candidate for vectorizing with SIMD. */
+ rte_memcpy((void *)(elts + (txq->elts_head & txq->elts_m)),
+ (void *)pkts,
+ RTE_MIN(part, pkts_n) * sizeof(struct rte_mbuf *));
+ txq->elts_head += pkts_n;
+ if (unlikely(part < pkts_n))
+ /* The copy is wrapping around the elts array. */
+ rte_memcpy((void *)elts, (void *)(pkts + part),
+ (pkts_n - part) * sizeof(struct rte_mbuf *));
+}
+
+/**
+ * Check if the completion request flag should be set in the last WQE.
+ * Both pushed mbufs and WQEs are monitored and the completion request
+ * flag is set if any of thresholds is reached.
+ *
+ * @param txq
+ * Pointer to TX queue structure.
+ * @param loc
+ * Pointer to burst routine local context.
+ * @param olx
+ * Configured Tx offloads mask. It is fully defined at
+ * compile time and may be used for optimization.
+ */
+static __rte_always_inline void
+mlx5_tx_request_completion(struct mlx5_txq_data *__rte_restrict txq,
+ struct mlx5_txq_local *__rte_restrict loc,
+ unsigned int olx)
+{
+ uint16_t head = txq->elts_head;
+ unsigned int part;
+
+ part = MLX5_TXOFF_CONFIG(INLINE) ?
+ 0 : loc->pkts_sent - loc->pkts_copy;
+ head += part;
+ if ((uint16_t)(head - txq->elts_comp) >= MLX5_TX_COMP_THRESH ||
+ (MLX5_TXOFF_CONFIG(INLINE) &&
+ (uint16_t)(txq->wqe_ci - txq->wqe_comp) >= txq->wqe_thres)) {
+ volatile struct mlx5_wqe *last = loc->wqe_last;
+
+ MLX5_ASSERT(last);
+ txq->elts_comp = head;
+ if (MLX5_TXOFF_CONFIG(INLINE))
+ txq->wqe_comp = txq->wqe_ci;
+ /* Request unconditional completion on last WQE. */
+ last->cseg.flags = RTE_BE32(MLX5_COMP_ALWAYS <<
+ MLX5_COMP_MODE_OFFSET);
+ /* Save elts_head in dedicated free on completion queue. */
+#ifdef RTE_LIBRTE_MLX5_DEBUG
+ txq->fcqs[txq->cq_pi++ & txq->cqe_m] = head |
+ (last->cseg.opcode >> 8) << 16;
+#else
+ txq->fcqs[txq->cq_pi++ & txq->cqe_m] = head;
+#endif
+ /* A CQE slot must always be available. */
+ MLX5_ASSERT((txq->cq_pi - txq->cq_ci) <= txq->cqe_s);
+ }
+}
+
+/**
+ * Build the Control Segment with specified opcode:
+ * - MLX5_OPCODE_SEND
+ * - MLX5_OPCODE_ENHANCED_MPSW
+ * - MLX5_OPCODE_TSO
+ *
+ * @param txq
+ * Pointer to TX queue structure.
+ * @param loc
+ * Pointer to burst routine local context.
+ * @param wqe
+ * Pointer to WQE to fill with built Control Segment.
+ * @param ds
+ * Supposed length of WQE in segments.
+ * @param opcode
+ * SQ WQE opcode to put into Control Segment.
+ * @param olx
+ * Configured Tx offloads mask. It is fully defined at
+ * compile time and may be used for optimization.
+ */
+static __rte_always_inline void
+mlx5_tx_cseg_init(struct mlx5_txq_data *__rte_restrict txq,
+ struct mlx5_txq_local *__rte_restrict loc __rte_unused,
+ struct mlx5_wqe *__rte_restrict wqe,
+ unsigned int ds,
+ unsigned int opcode,
+ unsigned int olx __rte_unused)
+{
+ struct mlx5_wqe_cseg *__rte_restrict cs = &wqe->cseg;
+
+ /* For legacy MPW replace the EMPW by TSO with modifier. */
+ if (MLX5_TXOFF_CONFIG(MPW) && opcode == MLX5_OPCODE_ENHANCED_MPSW)
+ opcode = MLX5_OPCODE_TSO | MLX5_OPC_MOD_MPW << 24;
+ cs->opcode = rte_cpu_to_be_32((txq->wqe_ci << 8) | opcode);
+ cs->sq_ds = rte_cpu_to_be_32(txq->qp_num_8s | ds);
+ cs->flags = RTE_BE32(MLX5_COMP_ONLY_FIRST_ERR <<
+ MLX5_COMP_MODE_OFFSET);
+ cs->misc = RTE_BE32(0);
+}
+
+/**
+ * Build the Synchronize Queue Segment with specified completion index.
+ *
+ * @param txq
+ * Pointer to TX queue structure.
+ * @param loc
+ * Pointer to burst routine local context.
+ * @param wqe
+ * Pointer to WQE to fill with built Control Segment.
+ * @param wci
+ * Completion index in Clock Queue to wait.
+ * @param olx
+ * Configured Tx offloads mask. It is fully defined at
+ * compile time and may be used for optimization.
+ */
+static __rte_always_inline void
+mlx5_tx_wseg_init(struct mlx5_txq_data *restrict txq,
+ struct mlx5_txq_local *restrict loc __rte_unused,
+ struct mlx5_wqe *restrict wqe,
+ unsigned int wci,
+ unsigned int olx __rte_unused)
+{
+ struct mlx5_wqe_qseg *qs;
+
+ qs = RTE_PTR_ADD(wqe, MLX5_WSEG_SIZE);
+ qs->max_index = rte_cpu_to_be_32(wci);
+ qs->qpn_cqn = rte_cpu_to_be_32(txq->sh->txpp.clock_queue.cq_obj.cq->id);
+ qs->reserved0 = RTE_BE32(0);
+ qs->reserved1 = RTE_BE32(0);
+}
+
+/**
+ * Build the Ethernet Segment without inlined data.
+ * Supports Software Parser, Checksums and VLAN insertion Tx offload features.
+ *
+ * @param txq
+ * Pointer to TX queue structure.
+ * @param loc
+ * Pointer to burst routine local context.
+ * @param wqe
+ * Pointer to WQE to fill with built Ethernet Segment.
+ * @param olx
+ * Configured Tx offloads mask. It is fully defined at
+ * compile time and may be used for optimization.
+ */
+static __rte_always_inline void
+mlx5_tx_eseg_none(struct mlx5_txq_data *__rte_restrict txq __rte_unused,
+ struct mlx5_txq_local *__rte_restrict loc,
+ struct mlx5_wqe *__rte_restrict wqe,
+ unsigned int olx)
+{
+ struct mlx5_wqe_eseg *__rte_restrict es = &wqe->eseg;
+ uint32_t csum;
+
+ /*
+ * Calculate and set check sum flags first, dword field
+ * in segment may be shared with Software Parser flags.
+ */
+ csum = MLX5_TXOFF_CONFIG(CSUM) ? txq_ol_cksum_to_cs(loc->mbuf) : 0;
+ es->flags = rte_cpu_to_le_32(csum);
+ /*
+ * Calculate and set Software Parser offsets and flags.
+ * These flags a set for custom UDP and IP tunnel packets.
+ */
+ es->swp_offs = txq_mbuf_to_swp(loc, &es->swp_flags, olx);
+ /* Fill metadata field if needed. */
+ es->metadata = MLX5_TXOFF_CONFIG(METADATA) ?
+ loc->mbuf->ol_flags & PKT_TX_DYNF_METADATA ?
+ *RTE_FLOW_DYNF_METADATA(loc->mbuf) : 0 : 0;
+ /* Engage VLAN tag insertion feature if requested. */
+ if (MLX5_TXOFF_CONFIG(VLAN) &&
+ loc->mbuf->ol_flags & PKT_TX_VLAN_PKT) {
+ /*
+ * We should get here only if device support
+ * this feature correctly.
+ */
+ MLX5_ASSERT(txq->vlan_en);
+ es->inline_hdr = rte_cpu_to_be_32(MLX5_ETH_WQE_VLAN_INSERT |
+ loc->mbuf->vlan_tci);
+ } else {
+ es->inline_hdr = RTE_BE32(0);
+ }
+}
+
+/**
+ * Build the Ethernet Segment with minimal inlined data
+ * of MLX5_ESEG_MIN_INLINE_SIZE bytes length. This is
+ * used to fill the gap in single WQEBB WQEs.
+ * Supports Software Parser, Checksums and VLAN
+ * insertion Tx offload features.
+ *
+ * @param txq
+ * Pointer to TX queue structure.
+ * @param loc
+ * Pointer to burst routine local context.
+ * @param wqe
+ * Pointer to WQE to fill with built Ethernet Segment.
+ * @param vlan
+ * Length of VLAN tag insertion if any.
+ * @param olx
+ * Configured Tx offloads mask. It is fully defined at
+ * compile time and may be used for optimization.
+ */
+static __rte_always_inline void
+mlx5_tx_eseg_dmin(struct mlx5_txq_data *__rte_restrict txq __rte_unused,
+ struct mlx5_txq_local *__rte_restrict loc,
+ struct mlx5_wqe *__rte_restrict wqe,
+ unsigned int vlan,
+ unsigned int olx)
+{
+ struct mlx5_wqe_eseg *__rte_restrict es = &wqe->eseg;
+ uint32_t csum;
+ uint8_t *psrc, *pdst;
+
+ /*
+ * Calculate and set check sum flags first, dword field
+ * in segment may be shared with Software Parser flags.
+ */
+ csum = MLX5_TXOFF_CONFIG(CSUM) ? txq_ol_cksum_to_cs(loc->mbuf) : 0;
+ es->flags = rte_cpu_to_le_32(csum);
+ /*
+ * Calculate and set Software Parser offsets and flags.
+ * These flags a set for custom UDP and IP tunnel packets.
+ */
+ es->swp_offs = txq_mbuf_to_swp(loc, &es->swp_flags, olx);
+ /* Fill metadata field if needed. */
+ es->metadata = MLX5_TXOFF_CONFIG(METADATA) ?
+ loc->mbuf->ol_flags & PKT_TX_DYNF_METADATA ?
+ *RTE_FLOW_DYNF_METADATA(loc->mbuf) : 0 : 0;
+ psrc = rte_pktmbuf_mtod(loc->mbuf, uint8_t *);
+ es->inline_hdr_sz = RTE_BE16(MLX5_ESEG_MIN_INLINE_SIZE);
+ es->inline_data = *(unaligned_uint16_t *)psrc;
+ psrc += sizeof(uint16_t);
+ pdst = (uint8_t *)(es + 1);
+ if (MLX5_TXOFF_CONFIG(VLAN) && vlan) {
+ /* Implement VLAN tag insertion as part inline data. */
+ memcpy(pdst, psrc, 2 * RTE_ETHER_ADDR_LEN - sizeof(uint16_t));
+ pdst += 2 * RTE_ETHER_ADDR_LEN - sizeof(uint16_t);
+ psrc += 2 * RTE_ETHER_ADDR_LEN - sizeof(uint16_t);
+ /* Insert VLAN ethertype + VLAN tag. */
+ *(unaligned_uint32_t *)pdst = rte_cpu_to_be_32
+ ((RTE_ETHER_TYPE_VLAN << 16) |
+ loc->mbuf->vlan_tci);
+ pdst += sizeof(struct rte_vlan_hdr);
+ /* Copy the rest two bytes from packet data. */
+ MLX5_ASSERT(pdst == RTE_PTR_ALIGN(pdst, sizeof(uint16_t)));
+ *(uint16_t *)pdst = *(unaligned_uint16_t *)psrc;
+ } else {
+ /* Fill the gap in the title WQEBB with inline data. */
+ rte_mov16(pdst, psrc);
+ }
+}
+
+/**
+ * Build the Ethernet Segment with entire packet data inlining. Checks the
+ * boundary of WQEBB and ring buffer wrapping, supports Software Parser,
+ * Checksums and VLAN insertion Tx offload features.
+ *
+ * @param txq
+ * Pointer to TX queue structure.
+ * @param loc
+ * Pointer to burst routine local context.
+ * @param wqe
+ * Pointer to WQE to fill with built Ethernet Segment.
+ * @param vlan
+ * Length of VLAN tag insertion if any.
+ * @param inlen
+ * Length of data to inline (VLAN included, if any).
+ * @param tso
+ * TSO flag, set mss field from the packet.
+ * @param olx
+ * Configured Tx offloads mask. It is fully defined at
+ * compile time and may be used for optimization.
+ *
+ * @return
+ * Pointer to the next Data Segment (aligned and wrapped around).
+ */
+static __rte_always_inline struct mlx5_wqe_dseg *
+mlx5_tx_eseg_data(struct mlx5_txq_data *__rte_restrict txq,
+ struct mlx5_txq_local *__rte_restrict loc,
+ struct mlx5_wqe *__rte_restrict wqe,
+ unsigned int vlan,
+ unsigned int inlen,
+ unsigned int tso,
+ unsigned int olx)
+{
+ struct mlx5_wqe_eseg *__rte_restrict es = &wqe->eseg;
+ uint32_t csum;
+ uint8_t *psrc, *pdst;
+ unsigned int part;
+
+ /*
+ * Calculate and set check sum flags first, dword field
+ * in segment may be shared with Software Parser flags.
+ */
+ csum = MLX5_TXOFF_CONFIG(CSUM) ? txq_ol_cksum_to_cs(loc->mbuf) : 0;
+ if (tso) {
+ csum <<= 24;
+ csum |= loc->mbuf->tso_segsz;
+ es->flags = rte_cpu_to_be_32(csum);
+ } else {
+ es->flags = rte_cpu_to_le_32(csum);
+ }
+ /*
+ * Calculate and set Software Parser offsets and flags.
+ * These flags a set for custom UDP and IP tunnel packets.
+ */
+ es->swp_offs = txq_mbuf_to_swp(loc, &es->swp_flags, olx);
+ /* Fill metadata field if needed. */
+ es->metadata = MLX5_TXOFF_CONFIG(METADATA) ?
+ loc->mbuf->ol_flags & PKT_TX_DYNF_METADATA ?
+ *RTE_FLOW_DYNF_METADATA(loc->mbuf) : 0 : 0;
+ psrc = rte_pktmbuf_mtod(loc->mbuf, uint8_t *);
+ es->inline_hdr_sz = rte_cpu_to_be_16(inlen);
+ es->inline_data = *(unaligned_uint16_t *)psrc;
+ psrc += sizeof(uint16_t);
+ pdst = (uint8_t *)(es + 1);
+ if (MLX5_TXOFF_CONFIG(VLAN) && vlan) {
+ /* Implement VLAN tag insertion as part inline data. */
+ memcpy(pdst, psrc, 2 * RTE_ETHER_ADDR_LEN - sizeof(uint16_t));
+ pdst += 2 * RTE_ETHER_ADDR_LEN - sizeof(uint16_t);
+ psrc += 2 * RTE_ETHER_ADDR_LEN - sizeof(uint16_t);
+ /* Insert VLAN ethertype + VLAN tag. */
+ *(unaligned_uint32_t *)pdst = rte_cpu_to_be_32
+ ((RTE_ETHER_TYPE_VLAN << 16) |
+ loc->mbuf->vlan_tci);
+ pdst += sizeof(struct rte_vlan_hdr);
+ /* Copy the rest two bytes from packet data. */
+ MLX5_ASSERT(pdst == RTE_PTR_ALIGN(pdst, sizeof(uint16_t)));
+ *(uint16_t *)pdst = *(unaligned_uint16_t *)psrc;
+ psrc += sizeof(uint16_t);
+ } else {
+ /* Fill the gap in the title WQEBB with inline data. */
+ rte_mov16(pdst, psrc);
+ psrc += sizeof(rte_v128u32_t);
+ }
+ pdst = (uint8_t *)(es + 2);
+ MLX5_ASSERT(inlen >= MLX5_ESEG_MIN_INLINE_SIZE);
+ MLX5_ASSERT(pdst < (uint8_t *)txq->wqes_end);
+ inlen -= MLX5_ESEG_MIN_INLINE_SIZE;
+ if (!inlen) {
+ MLX5_ASSERT(pdst == RTE_PTR_ALIGN(pdst, MLX5_WSEG_SIZE));
+ return (struct mlx5_wqe_dseg *)pdst;
+ }
+ /*
+ * The WQEBB space availability is checked by caller.
+ * Here we should be aware of WQE ring buffer wraparound only.
+ */
+ part = (uint8_t *)txq->wqes_end - pdst;
+ part = RTE_MIN(part, inlen);
+ do {
+ rte_memcpy(pdst, psrc, part);
+ inlen -= part;
+ if (likely(!inlen)) {
+ /*
+ * If return value is not used by the caller
+ * the code below will be optimized out.
+ */
+ pdst += part;
+ pdst = RTE_PTR_ALIGN(pdst, MLX5_WSEG_SIZE);
+ if (unlikely(pdst >= (uint8_t *)txq->wqes_end))
+ pdst = (uint8_t *)txq->wqes;
+ return (struct mlx5_wqe_dseg *)pdst;
+ }
+ pdst = (uint8_t *)txq->wqes;
+ psrc += part;
+ part = inlen;
+ } while (true);
+}
+
+/**
+ * Copy data from chain of mbuf to the specified linear buffer.
+ * Checksums and VLAN insertion Tx offload features. If data
+ * from some mbuf copied completely this mbuf is freed. Local
+ * structure is used to keep the byte stream state.
+ *
+ * @param pdst
+ * Pointer to the destination linear buffer.
+ * @param loc
+ * Pointer to burst routine local context.
+ * @param len
+ * Length of data to be copied.
+ * @param must
+ * Length of data to be copied ignoring no inline hint.
+ * @param olx
+ * Configured Tx offloads mask. It is fully defined at
+ * compile time and may be used for optimization.
+ *
+ * @return
+ * Number of actual copied data bytes. This is always greater than or
+ * equal to must parameter and might be lesser than len in no inline
+ * hint flag is encountered.
+ */
+static __rte_always_inline unsigned int
+mlx5_tx_mseg_memcpy(uint8_t *pdst,
+ struct mlx5_txq_local *__rte_restrict loc,
+ unsigned int len,
+ unsigned int must,
+ unsigned int olx __rte_unused)
+{
+ struct rte_mbuf *mbuf;
+ unsigned int part, dlen, copy = 0;
+ uint8_t *psrc;
+
+ MLX5_ASSERT(len);
+ MLX5_ASSERT(must <= len);
+ do {
+ /* Allow zero length packets, must check first. */
+ dlen = rte_pktmbuf_data_len(loc->mbuf);
+ if (dlen <= loc->mbuf_off) {
+ /* Exhausted packet, just free. */
+ mbuf = loc->mbuf;
+ loc->mbuf = mbuf->next;
+ rte_pktmbuf_free_seg(mbuf);
+ loc->mbuf_off = 0;
+ MLX5_ASSERT(loc->mbuf_nseg > 1);
+ MLX5_ASSERT(loc->mbuf);
+ --loc->mbuf_nseg;
+ if (loc->mbuf->ol_flags & PKT_TX_DYNF_NOINLINE) {
+ unsigned int diff;
+
+ if (copy >= must) {
+ /*
+ * We already copied the minimal
+ * requested amount of data.
+ */
+ return copy;
+ }
+ diff = must - copy;
+ if (diff <= rte_pktmbuf_data_len(loc->mbuf)) {
+ /*
+ * Copy only the minimal required
+ * part of the data buffer.
+ */
+ len = diff;
+ }
+ }
+ continue;
+ }
+ dlen -= loc->mbuf_off;
+ psrc = rte_pktmbuf_mtod_offset(loc->mbuf, uint8_t *,
+ loc->mbuf_off);
+ part = RTE_MIN(len, dlen);
+ rte_memcpy(pdst, psrc, part);
+ copy += part;
+ loc->mbuf_off += part;
+ len -= part;
+ if (!len) {
+ if (loc->mbuf_off >= rte_pktmbuf_data_len(loc->mbuf)) {
+ loc->mbuf_off = 0;
+ /* Exhausted packet, just free. */
+ mbuf = loc->mbuf;
+ loc->mbuf = mbuf->next;
+ rte_pktmbuf_free_seg(mbuf);
+ loc->mbuf_off = 0;
+ MLX5_ASSERT(loc->mbuf_nseg >= 1);
+ --loc->mbuf_nseg;
+ }
+ return copy;
+ }
+ pdst += part;
+ } while (true);
+}
+
+/**
+ * Build the Ethernet Segment with inlined data from multi-segment packet.
+ * Checks the boundary of WQEBB and ring buffer wrapping, supports Software
+ * Parser, Checksums and VLAN insertion Tx offload features.
+ *
+ * @param txq
+ * Pointer to TX queue structure.
+ * @param loc
+ * Pointer to burst routine local context.
+ * @param wqe
+ * Pointer to WQE to fill with built Ethernet Segment.
+ * @param vlan
+ * Length of VLAN tag insertion if any.
+ * @param inlen
+ * Length of data to inline (VLAN included, if any).
+ * @param tso
+ * TSO flag, set mss field from the packet.
+ * @param olx
+ * Configured Tx offloads mask. It is fully defined at
+ * compile time and may be used for optimization.
+ *
+ * @return
+ * Pointer to the next Data Segment (aligned and possible NOT wrapped
+ * around - caller should do wrapping check on its own).
+ */
+static __rte_always_inline struct mlx5_wqe_dseg *
+mlx5_tx_eseg_mdat(struct mlx5_txq_data *__rte_restrict txq,
+ struct mlx5_txq_local *__rte_restrict loc,
+ struct mlx5_wqe *__rte_restrict wqe,
+ unsigned int vlan,
+ unsigned int inlen,
+ unsigned int tso,
+ unsigned int olx)
+{
+ struct mlx5_wqe_eseg *__rte_restrict es = &wqe->eseg;
+ uint32_t csum;
+ uint8_t *pdst;
+ unsigned int part, tlen = 0;
+
+ /*
+ * Calculate and set check sum flags first, uint32_t field
+ * in segment may be shared with Software Parser flags.
+ */
+ csum = MLX5_TXOFF_CONFIG(CSUM) ? txq_ol_cksum_to_cs(loc->mbuf) : 0;
+ if (tso) {
+ csum <<= 24;
+ csum |= loc->mbuf->tso_segsz;
+ es->flags = rte_cpu_to_be_32(csum);
+ } else {
+ es->flags = rte_cpu_to_le_32(csum);
+ }
+ /*
+ * Calculate and set Software Parser offsets and flags.
+ * These flags a set for custom UDP and IP tunnel packets.
+ */
+ es->swp_offs = txq_mbuf_to_swp(loc, &es->swp_flags, olx);
+ /* Fill metadata field if needed. */
+ es->metadata = MLX5_TXOFF_CONFIG(METADATA) ?
+ loc->mbuf->ol_flags & PKT_TX_DYNF_METADATA ?
+ *RTE_FLOW_DYNF_METADATA(loc->mbuf) : 0 : 0;
+ MLX5_ASSERT(inlen >= MLX5_ESEG_MIN_INLINE_SIZE);
+ pdst = (uint8_t *)&es->inline_data;
+ if (MLX5_TXOFF_CONFIG(VLAN) && vlan) {
+ /* Implement VLAN tag insertion as part inline data. */
+ mlx5_tx_mseg_memcpy(pdst, loc,
+ 2 * RTE_ETHER_ADDR_LEN,
+ 2 * RTE_ETHER_ADDR_LEN, olx);
+ pdst += 2 * RTE_ETHER_ADDR_LEN;
+ *(unaligned_uint32_t *)pdst = rte_cpu_to_be_32
+ ((RTE_ETHER_TYPE_VLAN << 16) |
+ loc->mbuf->vlan_tci);
+ pdst += sizeof(struct rte_vlan_hdr);
+ tlen += 2 * RTE_ETHER_ADDR_LEN + sizeof(struct rte_vlan_hdr);
+ }
+ MLX5_ASSERT(pdst < (uint8_t *)txq->wqes_end);
+ /*
+ * The WQEBB space availability is checked by caller.
+ * Here we should be aware of WQE ring buffer wraparound only.
+ */
+ part = (uint8_t *)txq->wqes_end - pdst;
+ part = RTE_MIN(part, inlen - tlen);
+ MLX5_ASSERT(part);
+ do {
+ unsigned int copy;
+
+ /*
+ * Copying may be interrupted inside the routine
+ * if run into no inline hint flag.
+ */
+ copy = tlen >= txq->inlen_mode ? 0 : (txq->inlen_mode - tlen);
+ copy = mlx5_tx_mseg_memcpy(pdst, loc, part, copy, olx);
+ tlen += copy;
+ if (likely(inlen <= tlen) || copy < part) {
+ es->inline_hdr_sz = rte_cpu_to_be_16(tlen);
+ pdst += copy;
+ pdst = RTE_PTR_ALIGN(pdst, MLX5_WSEG_SIZE);
+ return (struct mlx5_wqe_dseg *)pdst;
+ }
+ pdst = (uint8_t *)txq->wqes;
+ part = inlen - tlen;
+ } while (true);
+}
+
+/**
+ * Build the Data Segment of pointer type.
+ *
+ * @param txq
+ * Pointer to TX queue structure.
+ * @param loc
+ * Pointer to burst routine local context.
+ * @param dseg
+ * Pointer to WQE to fill with built Data Segment.
+ * @param buf
+ * Data buffer to point.
+ * @param len
+ * Data buffer length.
+ * @param olx
+ * Configured Tx offloads mask. It is fully defined at
+ * compile time and may be used for optimization.
+ */
+static __rte_always_inline void
+mlx5_tx_dseg_ptr(struct mlx5_txq_data *__rte_restrict txq,
+ struct mlx5_txq_local *__rte_restrict loc,
+ struct mlx5_wqe_dseg *__rte_restrict dseg,
+ uint8_t *buf,
+ unsigned int len,
+ unsigned int olx __rte_unused)
+
+{
+ MLX5_ASSERT(len);
+ dseg->bcount = rte_cpu_to_be_32(len);
+ dseg->lkey = mlx5_tx_mb2mr(txq, loc->mbuf);
+ dseg->pbuf = rte_cpu_to_be_64((uintptr_t)buf);
+}
+
+/**
+ * Build the Data Segment of pointer type or inline if data length is less than
+ * buffer in minimal Data Segment size.
+ *
+ * @param txq
+ * Pointer to TX queue structure.
+ * @param loc
+ * Pointer to burst routine local context.
+ * @param dseg
+ * Pointer to WQE to fill with built Data Segment.
+ * @param buf
+ * Data buffer to point.
+ * @param len
+ * Data buffer length.
+ * @param olx
+ * Configured Tx offloads mask. It is fully defined at
+ * compile time and may be used for optimization.
+ */
+static __rte_always_inline void
+mlx5_tx_dseg_iptr(struct mlx5_txq_data *__rte_restrict txq,
+ struct mlx5_txq_local *__rte_restrict loc,
+ struct mlx5_wqe_dseg *__rte_restrict dseg,
+ uint8_t *buf,
+ unsigned int len,
+ unsigned int olx __rte_unused)
+
+{
+ uintptr_t dst, src;
+
+ MLX5_ASSERT(len);
+ if (len > MLX5_DSEG_MIN_INLINE_SIZE) {
+ dseg->bcount = rte_cpu_to_be_32(len);
+ dseg->lkey = mlx5_tx_mb2mr(txq, loc->mbuf);
+ dseg->pbuf = rte_cpu_to_be_64((uintptr_t)buf);
+
+ return;
+ }
+ dseg->bcount = rte_cpu_to_be_32(len | MLX5_ETH_WQE_DATA_INLINE);
+ /* Unrolled implementation of generic rte_memcpy. */
+ dst = (uintptr_t)&dseg->inline_data[0];
+ src = (uintptr_t)buf;
+ if (len & 0x08) {
+#ifdef RTE_ARCH_STRICT_ALIGN
+ MLX5_ASSERT(dst == RTE_PTR_ALIGN(dst, sizeof(uint32_t)));
+ *(uint32_t *)dst = *(unaligned_uint32_t *)src;
+ dst += sizeof(uint32_t);
+ src += sizeof(uint32_t);
+ *(uint32_t *)dst = *(unaligned_uint32_t *)src;
+ dst += sizeof(uint32_t);
+ src += sizeof(uint32_t);
+#else
+ *(uint64_t *)dst = *(unaligned_uint64_t *)src;
+ dst += sizeof(uint64_t);
+ src += sizeof(uint64_t);
+#endif
+ }
+ if (len & 0x04) {
+ *(uint32_t *)dst = *(unaligned_uint32_t *)src;
+ dst += sizeof(uint32_t);
+ src += sizeof(uint32_t);
+ }
+ if (len & 0x02) {
+ *(uint16_t *)dst = *(unaligned_uint16_t *)src;
+ dst += sizeof(uint16_t);
+ src += sizeof(uint16_t);
+ }
+ if (len & 0x01)
+ *(uint8_t *)dst = *(uint8_t *)src;
+}
+
+/**
+ * Build the Data Segment of inlined data from single
+ * segment packet, no VLAN insertion.
+ *
+ * @param txq
+ * Pointer to TX queue structure.
+ * @param loc
+ * Pointer to burst routine local context.
+ * @param dseg
+ * Pointer to WQE to fill with built Data Segment.
+ * @param buf
+ * Data buffer to point.
+ * @param len
+ * Data buffer length.
+ * @param olx
+ * Configured Tx offloads mask. It is fully defined at
+ * compile time and may be used for optimization.
+ *
+ * @return
+ * Pointer to the next Data Segment after inlined data.
+ * Ring buffer wraparound check is needed. We do not do it here because it
+ * may not be needed for the last packet in the eMPW session.
+ */
+static __rte_always_inline struct mlx5_wqe_dseg *
+mlx5_tx_dseg_empw(struct mlx5_txq_data *__rte_restrict txq,
+ struct mlx5_txq_local *__rte_restrict loc __rte_unused,
+ struct mlx5_wqe_dseg *__rte_restrict dseg,
+ uint8_t *buf,
+ unsigned int len,
+ unsigned int olx __rte_unused)
+{
+ unsigned int part;
+ uint8_t *pdst;
+
+ if (!MLX5_TXOFF_CONFIG(MPW)) {
+ /* Store the descriptor byte counter for eMPW sessions. */
+ dseg->bcount = rte_cpu_to_be_32(len | MLX5_ETH_WQE_DATA_INLINE);
+ pdst = &dseg->inline_data[0];
+ } else {
+ /* The entire legacy MPW session counter is stored on close. */
+ pdst = (uint8_t *)dseg;
+ }
+ /*
+ * The WQEBB space availability is checked by caller.
+ * Here we should be aware of WQE ring buffer wraparound only.
+ */
+ part = (uint8_t *)txq->wqes_end - pdst;
+ part = RTE_MIN(part, len);
+ do {
+ rte_memcpy(pdst, buf, part);
+ len -= part;
+ if (likely(!len)) {
+ pdst += part;
+ if (!MLX5_TXOFF_CONFIG(MPW))
+ pdst = RTE_PTR_ALIGN(pdst, MLX5_WSEG_SIZE);
+ /* Note: no final wraparound check here. */
+ return (struct mlx5_wqe_dseg *)pdst;
+ }
+ pdst = (uint8_t *)txq->wqes;
+ buf += part;
+ part = len;
+ } while (true);
+}
+
+/**
+ * Build the Data Segment of inlined data from single
+ * segment packet with VLAN insertion.
+ *
+ * @param txq
+ * Pointer to TX queue structure.
+ * @param loc
+ * Pointer to burst routine local context.
+ * @param dseg
+ * Pointer to the dseg fill with built Data Segment.
+ * @param buf
+ * Data buffer to point.
+ * @param len
+ * Data buffer length.
+ * @param olx
+ * Configured Tx offloads mask. It is fully defined at
+ * compile time and may be used for optimization.
+ *
+ * @return
+ * Pointer to the next Data Segment after inlined data.
+ * Ring buffer wraparound check is needed.
+ */
+static __rte_always_inline struct mlx5_wqe_dseg *
+mlx5_tx_dseg_vlan(struct mlx5_txq_data *__rte_restrict txq,
+ struct mlx5_txq_local *__rte_restrict loc __rte_unused,
+ struct mlx5_wqe_dseg *__rte_restrict dseg,
+ uint8_t *buf,
+ unsigned int len,
+ unsigned int olx __rte_unused)
+
+{
+ unsigned int part;
+ uint8_t *pdst;
+
+ MLX5_ASSERT(len > MLX5_ESEG_MIN_INLINE_SIZE);
+ if (!MLX5_TXOFF_CONFIG(MPW)) {
+ /* Store the descriptor byte counter for eMPW sessions. */
+ dseg->bcount = rte_cpu_to_be_32
+ ((len + sizeof(struct rte_vlan_hdr)) |
+ MLX5_ETH_WQE_DATA_INLINE);
+ pdst = &dseg->inline_data[0];
+ } else {
+ /* The entire legacy MPW session counter is stored on close. */
+ pdst = (uint8_t *)dseg;
+ }
+ memcpy(pdst, buf, MLX5_DSEG_MIN_INLINE_SIZE);
+ buf += MLX5_DSEG_MIN_INLINE_SIZE;
+ pdst += MLX5_DSEG_MIN_INLINE_SIZE;
+ len -= MLX5_DSEG_MIN_INLINE_SIZE;
+ /* Insert VLAN ethertype + VLAN tag. Pointer is aligned. */
+ MLX5_ASSERT(pdst == RTE_PTR_ALIGN(pdst, MLX5_WSEG_SIZE));
+ if (unlikely(pdst >= (uint8_t *)txq->wqes_end))
+ pdst = (uint8_t *)txq->wqes;
+ *(uint32_t *)pdst = rte_cpu_to_be_32((RTE_ETHER_TYPE_VLAN << 16) |
+ loc->mbuf->vlan_tci);
+ pdst += sizeof(struct rte_vlan_hdr);
+ /*
+ * The WQEBB space availability is checked by caller.
+ * Here we should be aware of WQE ring buffer wraparound only.
+ */
+ part = (uint8_t *)txq->wqes_end - pdst;
+ part = RTE_MIN(part, len);
+ do {
+ rte_memcpy(pdst, buf, part);
+ len -= part;
+ if (likely(!len)) {
+ pdst += part;
+ if (!MLX5_TXOFF_CONFIG(MPW))
+ pdst = RTE_PTR_ALIGN(pdst, MLX5_WSEG_SIZE);
+ /* Note: no final wraparound check here. */
+ return (struct mlx5_wqe_dseg *)pdst;
+ }
+ pdst = (uint8_t *)txq->wqes;
+ buf += part;
+ part = len;
+ } while (true);
+}
+
+/**
+ * Build the Ethernet Segment with optionally inlined data with
+ * VLAN insertion and following Data Segments (if any) from
+ * multi-segment packet. Used by ordinary send and TSO.
+ *
+ * @param txq
+ * Pointer to TX queue structure.
+ * @param loc
+ * Pointer to burst routine local context.
+ * @param wqe
+ * Pointer to WQE to fill with built Ethernet/Data Segments.
+ * @param vlan
+ * Length of VLAN header to insert, 0 means no VLAN insertion.
+ * @param inlen
+ * Data length to inline. For TSO this parameter specifies exact value,
+ * for ordinary send routine can be aligned by caller to provide better WQE
+ * space saving and data buffer start address alignment.
+ * This length includes VLAN header being inserted.
+ * @param tso
+ * Zero means ordinary send, inlined data can be extended,
+ * otherwise this is TSO, inlined data length is fixed.
+ * @param olx
+ * Configured Tx offloads mask. It is fully defined at
+ * compile time and may be used for optimization.
+ *
+ * @return
+ * Actual size of built WQE in segments.
+ */
+static __rte_always_inline unsigned int
+mlx5_tx_mseg_build(struct mlx5_txq_data *__rte_restrict txq,
+ struct mlx5_txq_local *__rte_restrict loc,
+ struct mlx5_wqe *__rte_restrict wqe,
+ unsigned int vlan,
+ unsigned int inlen,
+ unsigned int tso,
+ unsigned int olx __rte_unused)
+{
+ struct mlx5_wqe_dseg *__rte_restrict dseg;
+ unsigned int ds;
+
+ MLX5_ASSERT((rte_pktmbuf_pkt_len(loc->mbuf) + vlan) >= inlen);
+ loc->mbuf_nseg = NB_SEGS(loc->mbuf);
+ loc->mbuf_off = 0;
+
+ dseg = mlx5_tx_eseg_mdat(txq, loc, wqe, vlan, inlen, tso, olx);
+ if (!loc->mbuf_nseg)
+ goto dseg_done;
+ /*
+ * There are still some mbuf remaining, not inlined.
+ * The first mbuf may be partially inlined and we
+ * must process the possible non-zero data offset.
+ */
+ if (loc->mbuf_off) {
+ unsigned int dlen;
+ uint8_t *dptr;
+
+ /*
+ * Exhausted packets must be dropped before.
+ * Non-zero offset means there are some data
+ * remained in the packet.
+ */
+ MLX5_ASSERT(loc->mbuf_off < rte_pktmbuf_data_len(loc->mbuf));
+ MLX5_ASSERT(rte_pktmbuf_data_len(loc->mbuf));
+ dptr = rte_pktmbuf_mtod_offset(loc->mbuf, uint8_t *,
+ loc->mbuf_off);
+ dlen = rte_pktmbuf_data_len(loc->mbuf) - loc->mbuf_off;
+ /*
+ * Build the pointer/minimal Data Segment.
+ * Do ring buffer wrapping check in advance.
+ */
+ if ((uintptr_t)dseg >= (uintptr_t)txq->wqes_end)
+ dseg = (struct mlx5_wqe_dseg *)txq->wqes;
+ mlx5_tx_dseg_iptr(txq, loc, dseg, dptr, dlen, olx);
+ /* Store the mbuf to be freed on completion. */
+ MLX5_ASSERT(loc->elts_free);
+ txq->elts[txq->elts_head++ & txq->elts_m] = loc->mbuf;
+ --loc->elts_free;
+ ++dseg;
+ if (--loc->mbuf_nseg == 0)
+ goto dseg_done;
+ loc->mbuf = loc->mbuf->next;
+ loc->mbuf_off = 0;
+ }
+ do {
+ if (unlikely(!rte_pktmbuf_data_len(loc->mbuf))) {
+ struct rte_mbuf *mbuf;
+
+ /* Zero length segment found, just skip. */
+ mbuf = loc->mbuf;
+ loc->mbuf = loc->mbuf->next;
+ rte_pktmbuf_free_seg(mbuf);
+ if (--loc->mbuf_nseg == 0)
+ break;
+ } else {
+ if ((uintptr_t)dseg >= (uintptr_t)txq->wqes_end)
+ dseg = (struct mlx5_wqe_dseg *)txq->wqes;
+ mlx5_tx_dseg_iptr
+ (txq, loc, dseg,
+ rte_pktmbuf_mtod(loc->mbuf, uint8_t *),
+ rte_pktmbuf_data_len(loc->mbuf), olx);
+ MLX5_ASSERT(loc->elts_free);
+ txq->elts[txq->elts_head++ & txq->elts_m] = loc->mbuf;
+ --loc->elts_free;
+ ++dseg;
+ if (--loc->mbuf_nseg == 0)
+ break;
+ loc->mbuf = loc->mbuf->next;
+ }
+ } while (true);
+
+dseg_done:
+ /* Calculate actual segments used from the dseg pointer. */
+ if ((uintptr_t)wqe < (uintptr_t)dseg)
+ ds = ((uintptr_t)dseg - (uintptr_t)wqe) / MLX5_WSEG_SIZE;
+ else
+ ds = (((uintptr_t)dseg - (uintptr_t)wqe) +
+ txq->wqe_s * MLX5_WQE_SIZE) / MLX5_WSEG_SIZE;
+ return ds;
+}
+
+/**
+ * The routine checks timestamp flag in the current packet,
+ * and push WAIT WQE into the queue if scheduling is required.
+ *
+ * @param txq
+ * Pointer to TX queue structure.
+ * @param loc
+ * Pointer to burst routine local context.
+ * @param olx
+ * Configured Tx offloads mask. It is fully defined at
+ * compile time and may be used for optimization.
+ *
+ * @return
+ * MLX5_TXCMP_CODE_EXIT - sending is done or impossible.
+ * MLX5_TXCMP_CODE_SINGLE - continue processing with the packet.
+ * MLX5_TXCMP_CODE_MULTI - the WAIT inserted, continue processing.
+ * Local context variables partially updated.
+ */
+static __rte_always_inline enum mlx5_txcmp_code
+mlx5_tx_schedule_send(struct mlx5_txq_data *restrict txq,
+ struct mlx5_txq_local *restrict loc,
+ unsigned int olx)
+{
+ if (MLX5_TXOFF_CONFIG(TXPP) &&
+ loc->mbuf->ol_flags & txq->ts_mask) {
+ struct mlx5_wqe *wqe;
+ uint64_t ts;
+ int32_t wci;
+
+ /*
+ * Estimate the required space quickly and roughly.
+ * We would like to ensure the packet can be pushed
+ * to the queue and we won't get the orphan WAIT WQE.
+ */
+ if (loc->wqe_free <= MLX5_WQE_SIZE_MAX / MLX5_WQE_SIZE ||
+ loc->elts_free < NB_SEGS(loc->mbuf))
+ return MLX5_TXCMP_CODE_EXIT;
+ /* Convert the timestamp into completion to wait. */
+ ts = *RTE_MBUF_DYNFIELD(loc->mbuf, txq->ts_offset, uint64_t *);
+ wci = mlx5_txpp_convert_tx_ts(txq->sh, ts);
+ if (unlikely(wci < 0))
+ return MLX5_TXCMP_CODE_SINGLE;
+ /* Build the WAIT WQE with specified completion. */
+ wqe = txq->wqes + (txq->wqe_ci & txq->wqe_m);
+ mlx5_tx_cseg_init(txq, loc, wqe, 2, MLX5_OPCODE_WAIT, olx);
+ mlx5_tx_wseg_init(txq, loc, wqe, wci, olx);
+ ++txq->wqe_ci;
+ --loc->wqe_free;
+ return MLX5_TXCMP_CODE_MULTI;
+ }
+ return MLX5_TXCMP_CODE_SINGLE;
+}
+
+/**
+ * Tx one packet function for multi-segment TSO. Supports all
+ * types of Tx offloads, uses MLX5_OPCODE_TSO to build WQEs,
+ * sends one packet per WQE.
+ *
+ * This routine is responsible for storing processed mbuf
+ * into elts ring buffer and update elts_head.
+ *
+ * @param txq
+ * Pointer to TX queue structure.
+ * @param loc
+ * Pointer to burst routine local context.
+ * @param olx
+ * Configured Tx offloads mask. It is fully defined at
+ * compile time and may be used for optimization.
+ *
+ * @return
+ * MLX5_TXCMP_CODE_EXIT - sending is done or impossible.
+ * MLX5_TXCMP_CODE_ERROR - some unrecoverable error occurred.
+ * Local context variables partially updated.
+ */
+static __rte_always_inline enum mlx5_txcmp_code
+mlx5_tx_packet_multi_tso(struct mlx5_txq_data *__rte_restrict txq,
+ struct mlx5_txq_local *__rte_restrict loc,
+ unsigned int olx)
+{
+ struct mlx5_wqe *__rte_restrict wqe;
+ unsigned int ds, dlen, inlen, ntcp, vlan = 0;
+
+ if (MLX5_TXOFF_CONFIG(TXPP)) {
+ enum mlx5_txcmp_code wret;
+
+ /* Generate WAIT for scheduling if requested. */
+ wret = mlx5_tx_schedule_send(txq, loc, olx);
+ if (wret == MLX5_TXCMP_CODE_EXIT)
+ return MLX5_TXCMP_CODE_EXIT;
+ if (wret == MLX5_TXCMP_CODE_ERROR)
+ return MLX5_TXCMP_CODE_ERROR;
+ }
+ /*
+ * Calculate data length to be inlined to estimate
+ * the required space in WQE ring buffer.
+ */
+ dlen = rte_pktmbuf_pkt_len(loc->mbuf);
+ if (MLX5_TXOFF_CONFIG(VLAN) && loc->mbuf->ol_flags & PKT_TX_VLAN_PKT)
+ vlan = sizeof(struct rte_vlan_hdr);
+ inlen = loc->mbuf->l2_len + vlan +
+ loc->mbuf->l3_len + loc->mbuf->l4_len;
+ if (unlikely((!inlen || !loc->mbuf->tso_segsz)))
+ return MLX5_TXCMP_CODE_ERROR;
+ if (loc->mbuf->ol_flags & PKT_TX_TUNNEL_MASK)
+ inlen += loc->mbuf->outer_l2_len + loc->mbuf->outer_l3_len;
+ /* Packet must contain all TSO headers. */
+ if (unlikely(inlen > MLX5_MAX_TSO_HEADER ||
+ inlen <= MLX5_ESEG_MIN_INLINE_SIZE ||
+ inlen > (dlen + vlan)))
+ return MLX5_TXCMP_CODE_ERROR;
+ MLX5_ASSERT(inlen >= txq->inlen_mode);
+ /*
+ * Check whether there are enough free WQEBBs:
+ * - Control Segment
+ * - Ethernet Segment
+ * - First Segment of inlined Ethernet data
+ * - ... data continued ...
+ * - Data Segments of pointer/min inline type
+ */
+ ds = NB_SEGS(loc->mbuf) + 2 + (inlen -
+ MLX5_ESEG_MIN_INLINE_SIZE +
+ MLX5_WSEG_SIZE +
+ MLX5_WSEG_SIZE - 1) / MLX5_WSEG_SIZE;
+ if (unlikely(loc->wqe_free < ((ds + 3) / 4)))
+ return MLX5_TXCMP_CODE_EXIT;
+ /* Check for maximal WQE size. */
+ if (unlikely((MLX5_WQE_SIZE_MAX / MLX5_WSEG_SIZE) < ((ds + 3) / 4)))
+ return MLX5_TXCMP_CODE_ERROR;
+#ifdef MLX5_PMD_SOFT_COUNTERS
+ /* Update sent data bytes/packets counters. */
+ ntcp = (dlen - (inlen - vlan) + loc->mbuf->tso_segsz - 1) /
+ loc->mbuf->tso_segsz;
+ /*
+ * One will be added for mbuf itself at the end of the mlx5_tx_burst
+ * from loc->pkts_sent field.
+ */
+ --ntcp;
+ txq->stats.opackets += ntcp;
+ txq->stats.obytes += dlen + vlan + ntcp * inlen;
+#endif
+ wqe = txq->wqes + (txq->wqe_ci & txq->wqe_m);
+ loc->wqe_last = wqe;
+ mlx5_tx_cseg_init(txq, loc, wqe, 0, MLX5_OPCODE_TSO, olx);
+ ds = mlx5_tx_mseg_build(txq, loc, wqe, vlan, inlen, 1, olx);
+ wqe->cseg.sq_ds = rte_cpu_to_be_32(txq->qp_num_8s | ds);
+ txq->wqe_ci += (ds + 3) / 4;
+ loc->wqe_free -= (ds + 3) / 4;
+ return MLX5_TXCMP_CODE_MULTI;
+}
+
+/**
+ * Tx one packet function for multi-segment SEND. Supports all types of Tx
+ * offloads, uses MLX5_OPCODE_SEND to build WQEs, sends one packet per WQE,
+ * without any data inlining in Ethernet Segment.
+ *
+ * This routine is responsible for storing processed mbuf
+ * into elts ring buffer and update elts_head.
+ *
+ * @param txq
+ * Pointer to TX queue structure.
+ * @param loc
+ * Pointer to burst routine local context.
+ * @param olx
+ * Configured Tx offloads mask. It is fully defined at
+ * compile time and may be used for optimization.
+ *
+ * @return
+ * MLX5_TXCMP_CODE_EXIT - sending is done or impossible.
+ * MLX5_TXCMP_CODE_ERROR - some unrecoverable error occurred.
+ * Local context variables partially updated.
+ */
+static __rte_always_inline enum mlx5_txcmp_code
+mlx5_tx_packet_multi_send(struct mlx5_txq_data *__rte_restrict txq,
+ struct mlx5_txq_local *__rte_restrict loc,
+ unsigned int olx)
+{
+ struct mlx5_wqe_dseg *__rte_restrict dseg;
+ struct mlx5_wqe *__rte_restrict wqe;
+ unsigned int ds, nseg;
+
+ MLX5_ASSERT(NB_SEGS(loc->mbuf) > 1);
+ if (MLX5_TXOFF_CONFIG(TXPP)) {
+ enum mlx5_txcmp_code wret;
+
+ /* Generate WAIT for scheduling if requested. */
+ wret = mlx5_tx_schedule_send(txq, loc, olx);
+ if (wret == MLX5_TXCMP_CODE_EXIT)
+ return MLX5_TXCMP_CODE_EXIT;
+ if (wret == MLX5_TXCMP_CODE_ERROR)
+ return MLX5_TXCMP_CODE_ERROR;
+ }
+ /*
+ * No inline at all, it means the CPU cycles saving is prioritized at
+ * configuration, we should not copy any packet data to WQE.
+ */
+ nseg = NB_SEGS(loc->mbuf);
+ ds = 2 + nseg;
+ if (unlikely(loc->wqe_free < ((ds + 3) / 4)))
+ return MLX5_TXCMP_CODE_EXIT;
+ /* Check for maximal WQE size. */
+ if (unlikely((MLX5_WQE_SIZE_MAX / MLX5_WSEG_SIZE) < ((ds + 3) / 4)))
+ return MLX5_TXCMP_CODE_ERROR;
+ /*
+ * Some Tx offloads may cause an error if packet is not long enough,
+ * check against assumed minimal length.
+ */
+ if (rte_pktmbuf_pkt_len(loc->mbuf) <= MLX5_ESEG_MIN_INLINE_SIZE)
+ return MLX5_TXCMP_CODE_ERROR;
+#ifdef MLX5_PMD_SOFT_COUNTERS
+ /* Update sent data bytes counter. */
+ txq->stats.obytes += rte_pktmbuf_pkt_len(loc->mbuf);
+ if (MLX5_TXOFF_CONFIG(VLAN) &&
+ loc->mbuf->ol_flags & PKT_TX_VLAN_PKT)
+ txq->stats.obytes += sizeof(struct rte_vlan_hdr);
+#endif
+ /*
+ * SEND WQE, one WQEBB:
+ * - Control Segment, SEND opcode
+ * - Ethernet Segment, optional VLAN, no inline
+ * - Data Segments, pointer only type
+ */
+ wqe = txq->wqes + (txq->wqe_ci & txq->wqe_m);
+ loc->wqe_last = wqe;
+ mlx5_tx_cseg_init(txq, loc, wqe, ds, MLX5_OPCODE_SEND, olx);
+ mlx5_tx_eseg_none(txq, loc, wqe, olx);
+ dseg = &wqe->dseg[0];
+ do {
+ if (unlikely(!rte_pktmbuf_data_len(loc->mbuf))) {
+ struct rte_mbuf *mbuf;
+
+ /*
+ * Zero length segment found, have to correct total
+ * size of WQE in segments.
+ * It is supposed to be rare occasion, so in normal
+ * case (no zero length segments) we avoid extra
+ * writing to the Control Segment.
+ */
+ --ds;
+ wqe->cseg.sq_ds -= RTE_BE32(1);
+ mbuf = loc->mbuf;
+ loc->mbuf = mbuf->next;
+ rte_pktmbuf_free_seg(mbuf);
+ if (--nseg == 0)
+ break;
+ } else {
+ mlx5_tx_dseg_ptr
+ (txq, loc, dseg,
+ rte_pktmbuf_mtod(loc->mbuf, uint8_t *),
+ rte_pktmbuf_data_len(loc->mbuf), olx);
+ txq->elts[txq->elts_head++ & txq->elts_m] = loc->mbuf;
+ --loc->elts_free;
+ if (--nseg == 0)
+ break;
+ ++dseg;
+ if ((uintptr_t)dseg >= (uintptr_t)txq->wqes_end)
+ dseg = (struct mlx5_wqe_dseg *)txq->wqes;
+ loc->mbuf = loc->mbuf->next;
+ }
+ } while (true);
+ txq->wqe_ci += (ds + 3) / 4;
+ loc->wqe_free -= (ds + 3) / 4;
+ return MLX5_TXCMP_CODE_MULTI;
+}
+
+/**
+ * Tx one packet function for multi-segment SEND. Supports all
+ * types of Tx offloads, uses MLX5_OPCODE_SEND to build WQEs,
+ * sends one packet per WQE, with data inlining in
+ * Ethernet Segment and minimal Data Segments.
+ *
+ * This routine is responsible for storing processed mbuf
+ * into elts ring buffer and update elts_head.
+ *
+ * @param txq
+ * Pointer to TX queue structure.
+ * @param loc
+ * Pointer to burst routine local context.
+ * @param olx
+ * Configured Tx offloads mask. It is fully defined at
+ * compile time and may be used for optimization.
+ *
+ * @return
+ * MLX5_TXCMP_CODE_EXIT - sending is done or impossible.
+ * MLX5_TXCMP_CODE_ERROR - some unrecoverable error occurred.
+ * Local context variables partially updated.
+ */
+static __rte_always_inline enum mlx5_txcmp_code
+mlx5_tx_packet_multi_inline(struct mlx5_txq_data *__rte_restrict txq,
+ struct mlx5_txq_local *__rte_restrict loc,
+ unsigned int olx)
+{
+ struct mlx5_wqe *__rte_restrict wqe;
+ unsigned int ds, inlen, dlen, vlan = 0;
+
+ MLX5_ASSERT(MLX5_TXOFF_CONFIG(INLINE));
+ MLX5_ASSERT(NB_SEGS(loc->mbuf) > 1);
+ if (MLX5_TXOFF_CONFIG(TXPP)) {
+ enum mlx5_txcmp_code wret;
+
+ /* Generate WAIT for scheduling if requested. */
+ wret = mlx5_tx_schedule_send(txq, loc, olx);
+ if (wret == MLX5_TXCMP_CODE_EXIT)
+ return MLX5_TXCMP_CODE_EXIT;
+ if (wret == MLX5_TXCMP_CODE_ERROR)
+ return MLX5_TXCMP_CODE_ERROR;
+ }
+ /*
+ * First calculate data length to be inlined
+ * to estimate the required space for WQE.
+ */
+ dlen = rte_pktmbuf_pkt_len(loc->mbuf);
+ if (MLX5_TXOFF_CONFIG(VLAN) && loc->mbuf->ol_flags & PKT_TX_VLAN_PKT)
+ vlan = sizeof(struct rte_vlan_hdr);
+ inlen = dlen + vlan;
+ /* Check against minimal length. */
+ if (inlen <= MLX5_ESEG_MIN_INLINE_SIZE)
+ return MLX5_TXCMP_CODE_ERROR;
+ MLX5_ASSERT(txq->inlen_send >= MLX5_ESEG_MIN_INLINE_SIZE);
+ if (inlen > txq->inlen_send ||
+ loc->mbuf->ol_flags & PKT_TX_DYNF_NOINLINE) {
+ struct rte_mbuf *mbuf;
+ unsigned int nxlen;
+ uintptr_t start;
+
+ /*
+ * Packet length exceeds the allowed inline data length,
+ * check whether the minimal inlining is required.
+ */
+ if (txq->inlen_mode) {
+ MLX5_ASSERT(txq->inlen_mode >=
+ MLX5_ESEG_MIN_INLINE_SIZE);
+ MLX5_ASSERT(txq->inlen_mode <= txq->inlen_send);
+ inlen = txq->inlen_mode;
+ } else {
+ if (loc->mbuf->ol_flags & PKT_TX_DYNF_NOINLINE ||
+ !vlan || txq->vlan_en) {
+ /*
+ * VLAN insertion will be done inside by HW.
+ * It is not utmost effective - VLAN flag is
+ * checked twice, but we should proceed the
+ * inlining length correctly and take into
+ * account the VLAN header being inserted.
+ */
+ return mlx5_tx_packet_multi_send
+ (txq, loc, olx);
+ }
+ inlen = MLX5_ESEG_MIN_INLINE_SIZE;
+ }
+ /*
+ * Now we know the minimal amount of data is requested
+ * to inline. Check whether we should inline the buffers
+ * from the chain beginning to eliminate some mbufs.
+ */
+ mbuf = loc->mbuf;
+ nxlen = rte_pktmbuf_data_len(mbuf);
+ if (unlikely(nxlen <= txq->inlen_send)) {
+ /* We can inline first mbuf at least. */
+ if (nxlen < inlen) {
+ unsigned int smlen;
+
+ /* Scan mbufs till inlen filled. */
+ do {
+ smlen = nxlen;
+ mbuf = NEXT(mbuf);
+ MLX5_ASSERT(mbuf);
+ nxlen = rte_pktmbuf_data_len(mbuf);
+ nxlen += smlen;
+ } while (unlikely(nxlen < inlen));
+ if (unlikely(nxlen > txq->inlen_send)) {
+ /* We cannot inline entire mbuf. */
+ smlen = inlen - smlen;
+ start = rte_pktmbuf_mtod_offset
+ (mbuf, uintptr_t, smlen);
+ goto do_align;
+ }
+ }
+ do {
+ inlen = nxlen;
+ mbuf = NEXT(mbuf);
+ /* There should be not end of packet. */
+ MLX5_ASSERT(mbuf);
+ nxlen = inlen + rte_pktmbuf_data_len(mbuf);
+ } while (unlikely(nxlen < txq->inlen_send));
+ }
+ start = rte_pktmbuf_mtod(mbuf, uintptr_t);
+ /*
+ * Check whether we can do inline to align start
+ * address of data buffer to cacheline.
+ */
+do_align:
+ start = (~start + 1) & (RTE_CACHE_LINE_SIZE - 1);
+ if (unlikely(start)) {
+ start += inlen;
+ if (start <= txq->inlen_send)
+ inlen = start;
+ }
+ }
+ /*
+ * Check whether there are enough free WQEBBs:
+ * - Control Segment
+ * - Ethernet Segment
+ * - First Segment of inlined Ethernet data
+ * - ... data continued ...
+ * - Data Segments of pointer/min inline type
+ *
+ * Estimate the number of Data Segments conservatively,
+ * supposing no any mbufs is being freed during inlining.
+ */
+ MLX5_ASSERT(inlen <= txq->inlen_send);
+ ds = NB_SEGS(loc->mbuf) + 2 + (inlen -
+ MLX5_ESEG_MIN_INLINE_SIZE +
+ MLX5_WSEG_SIZE +
+ MLX5_WSEG_SIZE - 1) / MLX5_WSEG_SIZE;
+ if (unlikely(loc->wqe_free < ((ds + 3) / 4)))
+ return MLX5_TXCMP_CODE_EXIT;
+ /* Check for maximal WQE size. */
+ if (unlikely((MLX5_WQE_SIZE_MAX / MLX5_WSEG_SIZE) < ((ds + 3) / 4)))
+ return MLX5_TXCMP_CODE_ERROR;
+#ifdef MLX5_PMD_SOFT_COUNTERS
+ /* Update sent data bytes/packets counters. */
+ txq->stats.obytes += dlen + vlan;
+#endif
+ wqe = txq->wqes + (txq->wqe_ci & txq->wqe_m);
+ loc->wqe_last = wqe;
+ mlx5_tx_cseg_init(txq, loc, wqe, 0, MLX5_OPCODE_SEND, olx);
+ ds = mlx5_tx_mseg_build(txq, loc, wqe, vlan, inlen, 0, olx);
+ wqe->cseg.sq_ds = rte_cpu_to_be_32(txq->qp_num_8s | ds);
+ txq->wqe_ci += (ds + 3) / 4;
+ loc->wqe_free -= (ds + 3) / 4;
+ return MLX5_TXCMP_CODE_MULTI;
+}
+
+/**
+ * Tx burst function for multi-segment packets. Supports all
+ * types of Tx offloads, uses MLX5_OPCODE_SEND/TSO to build WQEs,
+ * sends one packet per WQE. Function stops sending if it
+ * encounters the single-segment packet.
+ *
+ * This routine is responsible for storing processed mbuf
+ * into elts ring buffer and update elts_head.
+ *
+ * @param txq
+ * Pointer to TX queue structure.
+ * @param[in] pkts
+ * Packets to transmit.
+ * @param pkts_n
+ * Number of packets in array.
+ * @param loc
+ * Pointer to burst routine local context.
+ * @param olx
+ * Configured Tx offloads mask. It is fully defined at
+ * compile time and may be used for optimization.
+ *
+ * @return
+ * MLX5_TXCMP_CODE_EXIT - sending is done or impossible.
+ * MLX5_TXCMP_CODE_ERROR - some unrecoverable error occurred.
+ * MLX5_TXCMP_CODE_SINGLE - single-segment packet encountered.
+ * MLX5_TXCMP_CODE_TSO - TSO single-segment packet encountered.
+ * Local context variables updated.
+ */
+static __rte_always_inline enum mlx5_txcmp_code
+mlx5_tx_burst_mseg(struct mlx5_txq_data *__rte_restrict txq,
+ struct rte_mbuf **__rte_restrict pkts,
+ unsigned int pkts_n,
+ struct mlx5_txq_local *__rte_restrict loc,
+ unsigned int olx)
+{
+ MLX5_ASSERT(loc->elts_free && loc->wqe_free);
+ MLX5_ASSERT(pkts_n > loc->pkts_sent);
+ pkts += loc->pkts_sent + 1;
+ pkts_n -= loc->pkts_sent;
+ for (;;) {
+ enum mlx5_txcmp_code ret;
+
+ MLX5_ASSERT(NB_SEGS(loc->mbuf) > 1);
+ /*
+ * Estimate the number of free elts quickly but conservatively.
+ * Some segment may be fully inlined and freed,
+ * ignore this here - precise estimation is costly.
+ */
+ if (loc->elts_free < NB_SEGS(loc->mbuf))
+ return MLX5_TXCMP_CODE_EXIT;
+ if (MLX5_TXOFF_CONFIG(TSO) &&
+ unlikely(loc->mbuf->ol_flags & PKT_TX_TCP_SEG)) {
+ /* Proceed with multi-segment TSO. */
+ ret = mlx5_tx_packet_multi_tso(txq, loc, olx);
+ } else if (MLX5_TXOFF_CONFIG(INLINE)) {
+ /* Proceed with multi-segment SEND with inlining. */
+ ret = mlx5_tx_packet_multi_inline(txq, loc, olx);
+ } else {
+ /* Proceed with multi-segment SEND w/o inlining. */
+ ret = mlx5_tx_packet_multi_send(txq, loc, olx);
+ }
+ if (ret == MLX5_TXCMP_CODE_EXIT)
+ return MLX5_TXCMP_CODE_EXIT;
+ if (ret == MLX5_TXCMP_CODE_ERROR)
+ return MLX5_TXCMP_CODE_ERROR;
+ /* WQE is built, go to the next packet. */
+ ++loc->pkts_sent;
+ --pkts_n;
+ if (unlikely(!pkts_n || !loc->elts_free || !loc->wqe_free))
+ return MLX5_TXCMP_CODE_EXIT;
+ loc->mbuf = *pkts++;
+ if (pkts_n > 1)
+ rte_prefetch0(*pkts);
+ if (likely(NB_SEGS(loc->mbuf) > 1))
+ continue;
+ /* Here ends the series of multi-segment packets. */
+ if (MLX5_TXOFF_CONFIG(TSO) &&
+ unlikely(loc->mbuf->ol_flags & PKT_TX_TCP_SEG))
+ return MLX5_TXCMP_CODE_TSO;
+ return MLX5_TXCMP_CODE_SINGLE;
+ }
+ MLX5_ASSERT(false);
+}
+
+/**
+ * Tx burst function for single-segment packets with TSO.
+ * Supports all types of Tx offloads, except multi-packets.
+ * Uses MLX5_OPCODE_TSO to build WQEs, sends one packet per WQE.
+ * Function stops sending if it encounters the multi-segment
+ * packet or packet without TSO requested.
+ *
+ * The routine is responsible for storing processed mbuf into elts ring buffer
+ * and update elts_head if inline offloads is requested due to possible early
+ * freeing of the inlined mbufs (can not store pkts array in elts as a batch).
+ *
+ * @param txq
+ * Pointer to TX queue structure.
+ * @param[in] pkts
+ * Packets to transmit.
+ * @param pkts_n
+ * Number of packets in array.
+ * @param loc
+ * Pointer to burst routine local context.
+ * @param olx
+ * Configured Tx offloads mask. It is fully defined at
+ * compile time and may be used for optimization.
+ *
+ * @return
+ * MLX5_TXCMP_CODE_EXIT - sending is done or impossible.
+ * MLX5_TXCMP_CODE_ERROR - some unrecoverable error occurred.
+ * MLX5_TXCMP_CODE_SINGLE - single-segment packet encountered.
+ * MLX5_TXCMP_CODE_MULTI - multi-segment packet encountered.
+ * Local context variables updated.
+ */
+static __rte_always_inline enum mlx5_txcmp_code
+mlx5_tx_burst_tso(struct mlx5_txq_data *__rte_restrict txq,
+ struct rte_mbuf **__rte_restrict pkts,
+ unsigned int pkts_n,
+ struct mlx5_txq_local *__rte_restrict loc,
+ unsigned int olx)
+{
+ MLX5_ASSERT(loc->elts_free && loc->wqe_free);
+ MLX5_ASSERT(pkts_n > loc->pkts_sent);
+ pkts += loc->pkts_sent + 1;
+ pkts_n -= loc->pkts_sent;
+ for (;;) {
+ struct mlx5_wqe_dseg *__rte_restrict dseg;
+ struct mlx5_wqe *__rte_restrict wqe;
+ unsigned int ds, dlen, hlen, ntcp, vlan = 0;
+ uint8_t *dptr;
+
+ MLX5_ASSERT(NB_SEGS(loc->mbuf) == 1);
+ if (MLX5_TXOFF_CONFIG(TXPP)) {
+ enum mlx5_txcmp_code wret;
+
+ /* Generate WAIT for scheduling if requested. */
+ wret = mlx5_tx_schedule_send(txq, loc, olx);
+ if (wret == MLX5_TXCMP_CODE_EXIT)
+ return MLX5_TXCMP_CODE_EXIT;
+ if (wret == MLX5_TXCMP_CODE_ERROR)
+ return MLX5_TXCMP_CODE_ERROR;
+ }
+ dlen = rte_pktmbuf_data_len(loc->mbuf);
+ if (MLX5_TXOFF_CONFIG(VLAN) &&
+ loc->mbuf->ol_flags & PKT_TX_VLAN_PKT) {
+ vlan = sizeof(struct rte_vlan_hdr);
+ }
+ /*
+ * First calculate the WQE size to check
+ * whether we have enough space in ring buffer.
+ */
+ hlen = loc->mbuf->l2_len + vlan +
+ loc->mbuf->l3_len + loc->mbuf->l4_len;
+ if (unlikely((!hlen || !loc->mbuf->tso_segsz)))
+ return MLX5_TXCMP_CODE_ERROR;
+ if (loc->mbuf->ol_flags & PKT_TX_TUNNEL_MASK)
+ hlen += loc->mbuf->outer_l2_len +
+ loc->mbuf->outer_l3_len;
+ /* Segment must contain all TSO headers. */
+ if (unlikely(hlen > MLX5_MAX_TSO_HEADER ||
+ hlen <= MLX5_ESEG_MIN_INLINE_SIZE ||
+ hlen > (dlen + vlan)))
+ return MLX5_TXCMP_CODE_ERROR;
+ /*
+ * Check whether there are enough free WQEBBs:
+ * - Control Segment
+ * - Ethernet Segment
+ * - First Segment of inlined Ethernet data
+ * - ... data continued ...
+ * - Finishing Data Segment of pointer type
+ */
+ ds = 4 + (hlen - MLX5_ESEG_MIN_INLINE_SIZE +
+ MLX5_WSEG_SIZE - 1) / MLX5_WSEG_SIZE;
+ if (loc->wqe_free < ((ds + 3) / 4))
+ return MLX5_TXCMP_CODE_EXIT;
+#ifdef MLX5_PMD_SOFT_COUNTERS
+ /* Update sent data bytes/packets counters. */
+ ntcp = (dlen + vlan - hlen +
+ loc->mbuf->tso_segsz - 1) /
+ loc->mbuf->tso_segsz;
+ /*
+ * One will be added for mbuf itself at the end
+ * of the mlx5_tx_burst from loc->pkts_sent field.
+ */
+ --ntcp;
+ txq->stats.opackets += ntcp;
+ txq->stats.obytes += dlen + vlan + ntcp * hlen;
+#endif
+ /*
+ * Build the TSO WQE:
+ * - Control Segment
+ * - Ethernet Segment with hlen bytes inlined
+ * - Data Segment of pointer type
+ */
+ wqe = txq->wqes + (txq->wqe_ci & txq->wqe_m);
+ loc->wqe_last = wqe;
+ mlx5_tx_cseg_init(txq, loc, wqe, ds,
+ MLX5_OPCODE_TSO, olx);
+ dseg = mlx5_tx_eseg_data(txq, loc, wqe, vlan, hlen, 1, olx);
+ dptr = rte_pktmbuf_mtod(loc->mbuf, uint8_t *) + hlen - vlan;
+ dlen -= hlen - vlan;
+ mlx5_tx_dseg_ptr(txq, loc, dseg, dptr, dlen, olx);
+ /*
+ * WQE is built, update the loop parameters
+ * and go to the next packet.
+ */
+ txq->wqe_ci += (ds + 3) / 4;
+ loc->wqe_free -= (ds + 3) / 4;
+ if (MLX5_TXOFF_CONFIG(INLINE))
+ txq->elts[txq->elts_head++ & txq->elts_m] = loc->mbuf;
+ --loc->elts_free;
+ ++loc->pkts_sent;
+ --pkts_n;
+ if (unlikely(!pkts_n || !loc->elts_free || !loc->wqe_free))
+ return MLX5_TXCMP_CODE_EXIT;
+ loc->mbuf = *pkts++;
+ if (pkts_n > 1)
+ rte_prefetch0(*pkts);
+ if (MLX5_TXOFF_CONFIG(MULTI) &&
+ unlikely(NB_SEGS(loc->mbuf) > 1))
+ return MLX5_TXCMP_CODE_MULTI;
+ if (likely(!(loc->mbuf->ol_flags & PKT_TX_TCP_SEG)))
+ return MLX5_TXCMP_CODE_SINGLE;
+ /* Continue with the next TSO packet. */
+ }
+ MLX5_ASSERT(false);
+}
+
+/**
+ * Analyze the packet and select the best method to send.
+ *
+ * @param txq
+ * Pointer to TX queue structure.
+ * @param loc
+ * Pointer to burst routine local context.
+ * @param olx
+ * Configured Tx offloads mask. It is fully defined at
+ * compile time and may be used for optimization.
+ * @param newp
+ * The predefined flag whether do complete check for
+ * multi-segment packets and TSO.
+ *
+ * @return
+ * MLX5_TXCMP_CODE_MULTI - multi-segment packet encountered.
+ * MLX5_TXCMP_CODE_TSO - TSO required, use TSO/LSO.
+ * MLX5_TXCMP_CODE_SINGLE - single-segment packet, use SEND.
+ * MLX5_TXCMP_CODE_EMPW - single-segment packet, use MPW.
+ */
+static __rte_always_inline enum mlx5_txcmp_code
+mlx5_tx_able_to_empw(struct mlx5_txq_data *__rte_restrict txq,
+ struct mlx5_txq_local *__rte_restrict loc,
+ unsigned int olx,
+ bool newp)
+{
+ /* Check for multi-segment packet. */
+ if (newp &&
+ MLX5_TXOFF_CONFIG(MULTI) &&
+ unlikely(NB_SEGS(loc->mbuf) > 1))
+ return MLX5_TXCMP_CODE_MULTI;
+ /* Check for TSO packet. */
+ if (newp &&
+ MLX5_TXOFF_CONFIG(TSO) &&
+ unlikely(loc->mbuf->ol_flags & PKT_TX_TCP_SEG))
+ return MLX5_TXCMP_CODE_TSO;
+ /* Check if eMPW is enabled at all. */
+ if (!MLX5_TXOFF_CONFIG(EMPW))
+ return MLX5_TXCMP_CODE_SINGLE;
+ /* Check if eMPW can be engaged. */
+ if (MLX5_TXOFF_CONFIG(VLAN) &&
+ unlikely(loc->mbuf->ol_flags & PKT_TX_VLAN_PKT) &&
+ (!MLX5_TXOFF_CONFIG(INLINE) ||
+ unlikely((rte_pktmbuf_data_len(loc->mbuf) +
+ sizeof(struct rte_vlan_hdr)) > txq->inlen_empw))) {
+ /*
+ * eMPW does not support VLAN insertion offload, we have to
+ * inline the entire packet but packet is too long for inlining.
+ */
+ return MLX5_TXCMP_CODE_SINGLE;
+ }
+ return MLX5_TXCMP_CODE_EMPW;
+}
+
+/**
+ * Check the next packet attributes to match with the eMPW batch ones.
+ * In addition, for legacy MPW the packet length is checked either.
+ *
+ * @param txq
+ * Pointer to TX queue structure.
+ * @param es
+ * Pointer to Ethernet Segment of eMPW batch.
+ * @param loc
+ * Pointer to burst routine local context.
+ * @param dlen
+ * Length of previous packet in MPW descriptor.
+ * @param olx
+ * Configured Tx offloads mask. It is fully defined at
+ * compile time and may be used for optimization.
+ *
+ * @return
+ * true - packet match with eMPW batch attributes.
+ * false - no match, eMPW should be restarted.
+ */
+static __rte_always_inline bool
+mlx5_tx_match_empw(struct mlx5_txq_data *__rte_restrict txq,
+ struct mlx5_wqe_eseg *__rte_restrict es,
+ struct mlx5_txq_local *__rte_restrict loc,
+ uint32_t dlen,
+ unsigned int olx)
+{
+ uint8_t swp_flags = 0;
+
+ /* Compare the checksum flags, if any. */
+ if (MLX5_TXOFF_CONFIG(CSUM) &&
+ txq_ol_cksum_to_cs(loc->mbuf) != es->cs_flags)
+ return false;
+ /* Compare the Software Parser offsets and flags. */
+ if (MLX5_TXOFF_CONFIG(SWP) &&
+ (es->swp_offs != txq_mbuf_to_swp(loc, &swp_flags, olx) ||
+ es->swp_flags != swp_flags))
+ return false;
+ /* Fill metadata field if needed. */
+ if (MLX5_TXOFF_CONFIG(METADATA) &&
+ es->metadata != (loc->mbuf->ol_flags & PKT_TX_DYNF_METADATA ?
+ *RTE_FLOW_DYNF_METADATA(loc->mbuf) : 0))
+ return false;
+ /* Legacy MPW can send packets with the same length only. */
+ if (MLX5_TXOFF_CONFIG(MPW) &&
+ dlen != rte_pktmbuf_data_len(loc->mbuf))
+ return false;
+ /* There must be no VLAN packets in eMPW loop. */
+ if (MLX5_TXOFF_CONFIG(VLAN))
+ MLX5_ASSERT(!(loc->mbuf->ol_flags & PKT_TX_VLAN_PKT));
+ /* Check if the scheduling is requested. */
+ if (MLX5_TXOFF_CONFIG(TXPP) &&
+ loc->mbuf->ol_flags & txq->ts_mask)
+ return false;
+ return true;
+}
+
+/**
+ * Update send loop variables and WQE for eMPW loop without data inlining.
+ * Number of Data Segments is equal to the number of sent packets.
+ *
+ * @param txq
+ * Pointer to TX queue structure.
+ * @param loc
+ * Pointer to burst routine local context.
+ * @param ds
+ * Number of packets/Data Segments/Packets.
+ * @param slen
+ * Accumulated statistics, bytes sent.
+ * @param olx
+ * Configured Tx offloads mask. It is fully defined at
+ * compile time and may be used for optimization.
+ *
+ * @return
+ * true - packet match with eMPW batch attributes.
+ * false - no match, eMPW should be restarted.
+ */
+static __rte_always_inline void
+mlx5_tx_sdone_empw(struct mlx5_txq_data *__rte_restrict txq,
+ struct mlx5_txq_local *__rte_restrict loc,
+ unsigned int ds,
+ unsigned int slen,
+ unsigned int olx __rte_unused)
+{
+ MLX5_ASSERT(!MLX5_TXOFF_CONFIG(INLINE));
+#ifdef MLX5_PMD_SOFT_COUNTERS
+ /* Update sent data bytes counter. */
+ txq->stats.obytes += slen;
+#else
+ (void)slen;
+#endif
+ loc->elts_free -= ds;
+ loc->pkts_sent += ds;
+ ds += 2;
+ loc->wqe_last->cseg.sq_ds = rte_cpu_to_be_32(txq->qp_num_8s | ds);
+ txq->wqe_ci += (ds + 3) / 4;
+ loc->wqe_free -= (ds + 3) / 4;
+}
+
+/**
+ * Update send loop variables and WQE for eMPW loop with data inlining.
+ * Gets the size of pushed descriptors and data to the WQE.
+ *
+ * @param txq
+ * Pointer to TX queue structure.
+ * @param loc
+ * Pointer to burst routine local context.
+ * @param len
+ * Total size of descriptor/data in bytes.
+ * @param slen
+ * Accumulated statistics, data bytes sent.
+ * @param wqem
+ * The base WQE for the eMPW/MPW descriptor.
+ * @param olx
+ * Configured Tx offloads mask. It is fully defined at
+ * compile time and may be used for optimization.
+ *
+ * @return
+ * true - packet match with eMPW batch attributes.
+ * false - no match, eMPW should be restarted.
+ */
+static __rte_always_inline void
+mlx5_tx_idone_empw(struct mlx5_txq_data *__rte_restrict txq,
+ struct mlx5_txq_local *__rte_restrict loc,
+ unsigned int len,
+ unsigned int slen,
+ struct mlx5_wqe *__rte_restrict wqem,
+ unsigned int olx __rte_unused)
+{
+ struct mlx5_wqe_dseg *dseg = &wqem->dseg[0];
+
+ MLX5_ASSERT(MLX5_TXOFF_CONFIG(INLINE));
+#ifdef MLX5_PMD_SOFT_COUNTERS
+ /* Update sent data bytes counter. */
+ txq->stats.obytes += slen;
+#else
+ (void)slen;
+#endif
+ if (MLX5_TXOFF_CONFIG(MPW) && dseg->bcount == RTE_BE32(0)) {
+ /*
+ * If the legacy MPW session contains the inline packets
+ * we should set the only inline data segment length
+ * and align the total length to the segment size.
+ */
+ MLX5_ASSERT(len > sizeof(dseg->bcount));
+ dseg->bcount = rte_cpu_to_be_32((len - sizeof(dseg->bcount)) |
+ MLX5_ETH_WQE_DATA_INLINE);
+ len = (len + MLX5_WSEG_SIZE - 1) / MLX5_WSEG_SIZE + 2;
+ } else {
+ /*
+ * The session is not legacy MPW or contains the
+ * data buffer pointer segments.
+ */
+ MLX5_ASSERT((len % MLX5_WSEG_SIZE) == 0);
+ len = len / MLX5_WSEG_SIZE + 2;
+ }
+ wqem->cseg.sq_ds = rte_cpu_to_be_32(txq->qp_num_8s | len);
+ txq->wqe_ci += (len + 3) / 4;
+ loc->wqe_free -= (len + 3) / 4;
+ loc->wqe_last = wqem;
+}
+
+/**
+ * The set of Tx burst functions for single-segment packets without TSO
+ * and with Multi-Packet Writing feature support.
+ * Supports all types of Tx offloads, except multi-packets and TSO.
+ *
+ * Uses MLX5_OPCODE_EMPW to build WQEs if possible and sends as many packet
+ * per WQE as it can. If eMPW is not configured or packet can not be sent with
+ * eMPW (VLAN insertion) the ordinary SEND opcode is used and only one packet
+ * placed in WQE.
+ *
+ * Functions stop sending if it encounters the multi-segment packet or packet
+ * with TSO requested.
+ *
+ * The routines are responsible for storing processed mbuf into elts ring buffer
+ * and update elts_head if inlining offload is requested. Otherwise the copying
+ * mbufs to elts can be postponed and completed at the end of burst routine.
+ *
+ * @param txq
+ * Pointer to TX queue structure.
+ * @param[in] pkts
+ * Packets to transmit.
+ * @param pkts_n
+ * Number of packets in array.
+ * @param loc
+ * Pointer to burst routine local context.
+ * @param olx
+ * Configured Tx offloads mask. It is fully defined at
+ * compile time and may be used for optimization.
+ *
+ * @return
+ * MLX5_TXCMP_CODE_EXIT - sending is done or impossible.
+ * MLX5_TXCMP_CODE_ERROR - some unrecoverable error occurred.
+ * MLX5_TXCMP_CODE_MULTI - multi-segment packet encountered.
+ * MLX5_TXCMP_CODE_TSO - TSO packet encountered.
+ * MLX5_TXCMP_CODE_SINGLE - used inside functions set.
+ * MLX5_TXCMP_CODE_EMPW - used inside functions set.
+ *
+ * Local context variables updated.
+ *
+ *
+ * The routine sends packets with MLX5_OPCODE_EMPW
+ * without inlining, this is dedicated optimized branch.
+ * No VLAN insertion is supported.
+ */
+static __rte_always_inline enum mlx5_txcmp_code
+mlx5_tx_burst_empw_simple(struct mlx5_txq_data *__rte_restrict txq,
+ struct rte_mbuf **__rte_restrict pkts,
+ unsigned int pkts_n,
+ struct mlx5_txq_local *__rte_restrict loc,
+ unsigned int olx)
+{
+ /*
+ * Subroutine is the part of mlx5_tx_burst_single() and sends
+ * single-segment packet with eMPW opcode without data inlining.
+ */
+ MLX5_ASSERT(!MLX5_TXOFF_CONFIG(INLINE));
+ MLX5_ASSERT(MLX5_TXOFF_CONFIG(EMPW));
+ MLX5_ASSERT(loc->elts_free && loc->wqe_free);
+ MLX5_ASSERT(pkts_n > loc->pkts_sent);
+ pkts += loc->pkts_sent + 1;
+ pkts_n -= loc->pkts_sent;
+ for (;;) {
+ struct mlx5_wqe_dseg *__rte_restrict dseg;
+ struct mlx5_wqe_eseg *__rte_restrict eseg;
+ enum mlx5_txcmp_code ret;
+ unsigned int part, loop;
+ unsigned int slen = 0;
+
+next_empw:
+ MLX5_ASSERT(NB_SEGS(loc->mbuf) == 1);
+ if (MLX5_TXOFF_CONFIG(TXPP)) {
+ enum mlx5_txcmp_code wret;
+
+ /* Generate WAIT for scheduling if requested. */
+ wret = mlx5_tx_schedule_send(txq, loc, olx);
+ if (wret == MLX5_TXCMP_CODE_EXIT)
+ return MLX5_TXCMP_CODE_EXIT;
+ if (wret == MLX5_TXCMP_CODE_ERROR)
+ return MLX5_TXCMP_CODE_ERROR;
+ }
+ part = RTE_MIN(pkts_n, MLX5_TXOFF_CONFIG(MPW) ?
+ MLX5_MPW_MAX_PACKETS :
+ MLX5_EMPW_MAX_PACKETS);
+ if (unlikely(loc->elts_free < part)) {
+ /* We have no enough elts to save all mbufs. */
+ if (unlikely(loc->elts_free < MLX5_EMPW_MIN_PACKETS))
+ return MLX5_TXCMP_CODE_EXIT;
+ /* But we still able to send at least minimal eMPW. */
+ part = loc->elts_free;
+ }
+ /* Check whether we have enough WQEs */
+ if (unlikely(loc->wqe_free < ((2 + part + 3) / 4))) {
+ if (unlikely(loc->wqe_free <
+ ((2 + MLX5_EMPW_MIN_PACKETS + 3) / 4)))
+ return MLX5_TXCMP_CODE_EXIT;
+ part = (loc->wqe_free * 4) - 2;
+ }
+ if (likely(part > 1))
+ rte_prefetch0(*pkts);
+ loc->wqe_last = txq->wqes + (txq->wqe_ci & txq->wqe_m);
+ /*
+ * Build eMPW title WQEBB:
+ * - Control Segment, eMPW opcode
+ * - Ethernet Segment, no inline
+ */
+ mlx5_tx_cseg_init(txq, loc, loc->wqe_last, part + 2,
+ MLX5_OPCODE_ENHANCED_MPSW, olx);
+ mlx5_tx_eseg_none(txq, loc, loc->wqe_last,
+ olx & ~MLX5_TXOFF_CONFIG_VLAN);
+ eseg = &loc->wqe_last->eseg;
+ dseg = &loc->wqe_last->dseg[0];
+ loop = part;
+ /* Store the packet length for legacy MPW. */
+ if (MLX5_TXOFF_CONFIG(MPW))
+ eseg->mss = rte_cpu_to_be_16
+ (rte_pktmbuf_data_len(loc->mbuf));
+ for (;;) {
+ uint32_t dlen = rte_pktmbuf_data_len(loc->mbuf);
+#ifdef MLX5_PMD_SOFT_COUNTERS
+ /* Update sent data bytes counter. */
+ slen += dlen;
+#endif
+ mlx5_tx_dseg_ptr
+ (txq, loc, dseg,
+ rte_pktmbuf_mtod(loc->mbuf, uint8_t *),
+ dlen, olx);
+ if (unlikely(--loop == 0))
+ break;
+ loc->mbuf = *pkts++;
+ if (likely(loop > 1))
+ rte_prefetch0(*pkts);
+ ret = mlx5_tx_able_to_empw(txq, loc, olx, true);
+ /*
+ * Unroll the completion code to avoid
+ * returning variable value - it results in
+ * unoptimized sequent checking in caller.
+ */
+ if (ret == MLX5_TXCMP_CODE_MULTI) {
+ part -= loop;
+ mlx5_tx_sdone_empw(txq, loc, part, slen, olx);
+ if (unlikely(!loc->elts_free ||
+ !loc->wqe_free))
+ return MLX5_TXCMP_CODE_EXIT;
+ return MLX5_TXCMP_CODE_MULTI;
+ }
+ MLX5_ASSERT(NB_SEGS(loc->mbuf) == 1);
+ if (ret == MLX5_TXCMP_CODE_TSO) {
+ part -= loop;
+ mlx5_tx_sdone_empw(txq, loc, part, slen, olx);
+ if (unlikely(!loc->elts_free ||
+ !loc->wqe_free))
+ return MLX5_TXCMP_CODE_EXIT;
+ return MLX5_TXCMP_CODE_TSO;
+ }
+ if (ret == MLX5_TXCMP_CODE_SINGLE) {
+ part -= loop;
+ mlx5_tx_sdone_empw(txq, loc, part, slen, olx);
+ if (unlikely(!loc->elts_free ||
+ !loc->wqe_free))
+ return MLX5_TXCMP_CODE_EXIT;
+ return MLX5_TXCMP_CODE_SINGLE;
+ }
+ if (ret != MLX5_TXCMP_CODE_EMPW) {
+ MLX5_ASSERT(false);
+ part -= loop;
+ mlx5_tx_sdone_empw(txq, loc, part, slen, olx);
+ return MLX5_TXCMP_CODE_ERROR;
+ }
+ /*
+ * Check whether packet parameters coincide
+ * within assumed eMPW batch:
+ * - check sum settings
+ * - metadata value
+ * - software parser settings
+ * - packets length (legacy MPW only)
+ * - scheduling is not required
+ */
+ if (!mlx5_tx_match_empw(txq, eseg, loc, dlen, olx)) {
+ MLX5_ASSERT(loop);
+ part -= loop;
+ mlx5_tx_sdone_empw(txq, loc, part, slen, olx);
+ if (unlikely(!loc->elts_free ||
+ !loc->wqe_free))
+ return MLX5_TXCMP_CODE_EXIT;
+ pkts_n -= part;
+ goto next_empw;
+ }
+ /* Packet attributes match, continue the same eMPW. */
+ ++dseg;
+ if ((uintptr_t)dseg >= (uintptr_t)txq->wqes_end)
+ dseg = (struct mlx5_wqe_dseg *)txq->wqes;
+ }
+ /* eMPW is built successfully, update loop parameters. */
+ MLX5_ASSERT(!loop);
+ MLX5_ASSERT(pkts_n >= part);
+#ifdef MLX5_PMD_SOFT_COUNTERS
+ /* Update sent data bytes counter. */
+ txq->stats.obytes += slen;
+#endif
+ loc->elts_free -= part;
+ loc->pkts_sent += part;
+ txq->wqe_ci += (2 + part + 3) / 4;
+ loc->wqe_free -= (2 + part + 3) / 4;
+ pkts_n -= part;
+ if (unlikely(!pkts_n || !loc->elts_free || !loc->wqe_free))
+ return MLX5_TXCMP_CODE_EXIT;
+ loc->mbuf = *pkts++;
+ ret = mlx5_tx_able_to_empw(txq, loc, olx, true);
+ if (unlikely(ret != MLX5_TXCMP_CODE_EMPW))
+ return ret;
+ /* Continue sending eMPW batches. */
+ }
+ MLX5_ASSERT(false);
+}
+
+/**
+ * The routine sends packets with MLX5_OPCODE_EMPW
+ * with inlining, optionally supports VLAN insertion.
+ */
+static __rte_always_inline enum mlx5_txcmp_code
+mlx5_tx_burst_empw_inline(struct mlx5_txq_data *__rte_restrict txq,
+ struct rte_mbuf **__rte_restrict pkts,
+ unsigned int pkts_n,
+ struct mlx5_txq_local *__rte_restrict loc,
+ unsigned int olx)
+{
+ /*
+ * Subroutine is the part of mlx5_tx_burst_single() and sends
+ * single-segment packet with eMPW opcode with data inlining.
+ */
+ MLX5_ASSERT(MLX5_TXOFF_CONFIG(INLINE));
+ MLX5_ASSERT(MLX5_TXOFF_CONFIG(EMPW));
+ MLX5_ASSERT(loc->elts_free && loc->wqe_free);
+ MLX5_ASSERT(pkts_n > loc->pkts_sent);
+ pkts += loc->pkts_sent + 1;
+ pkts_n -= loc->pkts_sent;
+ for (;;) {
+ struct mlx5_wqe_dseg *__rte_restrict dseg;
+ struct mlx5_wqe *__rte_restrict wqem;
+ enum mlx5_txcmp_code ret;
+ unsigned int room, part, nlim;
+ unsigned int slen = 0;
+
+ MLX5_ASSERT(NB_SEGS(loc->mbuf) == 1);
+ if (MLX5_TXOFF_CONFIG(TXPP)) {
+ enum mlx5_txcmp_code wret;
+
+ /* Generate WAIT for scheduling if requested. */
+ wret = mlx5_tx_schedule_send(txq, loc, olx);
+ if (wret == MLX5_TXCMP_CODE_EXIT)
+ return MLX5_TXCMP_CODE_EXIT;
+ if (wret == MLX5_TXCMP_CODE_ERROR)
+ return MLX5_TXCMP_CODE_ERROR;
+ }
+ /*
+ * Limits the amount of packets in one WQE
+ * to improve CQE latency generation.
+ */
+ nlim = RTE_MIN(pkts_n, MLX5_TXOFF_CONFIG(MPW) ?
+ MLX5_MPW_INLINE_MAX_PACKETS :
+ MLX5_EMPW_MAX_PACKETS);
+ /* Check whether we have minimal amount WQEs */
+ if (unlikely(loc->wqe_free <
+ ((2 + MLX5_EMPW_MIN_PACKETS + 3) / 4)))
+ return MLX5_TXCMP_CODE_EXIT;
+ if (likely(pkts_n > 1))
+ rte_prefetch0(*pkts);
+ wqem = txq->wqes + (txq->wqe_ci & txq->wqe_m);
+ /*
+ * Build eMPW title WQEBB:
+ * - Control Segment, eMPW opcode, zero DS
+ * - Ethernet Segment, no inline
+ */
+ mlx5_tx_cseg_init(txq, loc, wqem, 0,
+ MLX5_OPCODE_ENHANCED_MPSW, olx);
+ mlx5_tx_eseg_none(txq, loc, wqem,
+ olx & ~MLX5_TXOFF_CONFIG_VLAN);
+ dseg = &wqem->dseg[0];
+ /* Store the packet length for legacy MPW. */
+ if (MLX5_TXOFF_CONFIG(MPW))
+ wqem->eseg.mss = rte_cpu_to_be_16
+ (rte_pktmbuf_data_len(loc->mbuf));
+ room = RTE_MIN(MLX5_WQE_SIZE_MAX / MLX5_WQE_SIZE,
+ loc->wqe_free) * MLX5_WQE_SIZE -
+ MLX5_WQE_CSEG_SIZE -
+ MLX5_WQE_ESEG_SIZE;
+ /* Limit the room for legacy MPW sessions for performance. */
+ if (MLX5_TXOFF_CONFIG(MPW))
+ room = RTE_MIN(room,
+ RTE_MAX(txq->inlen_empw +
+ sizeof(dseg->bcount) +
+ (MLX5_TXOFF_CONFIG(VLAN) ?
+ sizeof(struct rte_vlan_hdr) : 0),
+ MLX5_MPW_INLINE_MAX_PACKETS *
+ MLX5_WQE_DSEG_SIZE));
+ /* Build WQE till we have space, packets and resources. */
+ part = room;
+ for (;;) {
+ uint32_t dlen = rte_pktmbuf_data_len(loc->mbuf);
+ uint8_t *dptr = rte_pktmbuf_mtod(loc->mbuf, uint8_t *);
+ unsigned int tlen;
+
+ MLX5_ASSERT(room >= MLX5_WQE_DSEG_SIZE);
+ MLX5_ASSERT((room % MLX5_WQE_DSEG_SIZE) == 0);
+ MLX5_ASSERT((uintptr_t)dseg < (uintptr_t)txq->wqes_end);
+ /*
+ * Some Tx offloads may cause an error if packet is not
+ * long enough, check against assumed minimal length.
+ */
+ if (unlikely(dlen <= MLX5_ESEG_MIN_INLINE_SIZE)) {
+ part -= room;
+ if (unlikely(!part))
+ return MLX5_TXCMP_CODE_ERROR;
+ /*
+ * We have some successfully built
+ * packet Data Segments to send.
+ */
+ mlx5_tx_idone_empw(txq, loc, part,
+ slen, wqem, olx);
+ return MLX5_TXCMP_CODE_ERROR;
+ }
+ /* Inline or not inline - that's the Question. */
+ if (dlen > txq->inlen_empw ||
+ loc->mbuf->ol_flags & PKT_TX_DYNF_NOINLINE)
+ goto pointer_empw;
+ if (MLX5_TXOFF_CONFIG(MPW)) {
+ if (dlen > txq->inlen_send)
+ goto pointer_empw;
+ tlen = dlen;
+ if (part == room) {
+ /* Open new inline MPW session. */
+ tlen += sizeof(dseg->bcount);
+ dseg->bcount = RTE_BE32(0);
+ dseg = RTE_PTR_ADD
+ (dseg, sizeof(dseg->bcount));
+ } else {
+ /*
+ * No pointer and inline descriptor
+ * intermix for legacy MPW sessions.
+ */
+ if (wqem->dseg[0].bcount)
+ break;
+ }
+ } else {
+ tlen = sizeof(dseg->bcount) + dlen;
+ }
+ /* Inline entire packet, optional VLAN insertion. */
+ if (MLX5_TXOFF_CONFIG(VLAN) &&
+ loc->mbuf->ol_flags & PKT_TX_VLAN_PKT) {
+ /*
+ * The packet length must be checked in
+ * mlx5_tx_able_to_empw() and packet
+ * fits into inline length guaranteed.
+ */
+ MLX5_ASSERT((dlen +
+ sizeof(struct rte_vlan_hdr)) <=
+ txq->inlen_empw);
+ tlen += sizeof(struct rte_vlan_hdr);
+ if (room < tlen)
+ break;
+ dseg = mlx5_tx_dseg_vlan(txq, loc, dseg,
+ dptr, dlen, olx);
+#ifdef MLX5_PMD_SOFT_COUNTERS
+ /* Update sent data bytes counter. */
+ slen += sizeof(struct rte_vlan_hdr);
+#endif
+ } else {
+ if (room < tlen)
+ break;
+ dseg = mlx5_tx_dseg_empw(txq, loc, dseg,
+ dptr, dlen, olx);
+ }
+ if (!MLX5_TXOFF_CONFIG(MPW))
+ tlen = RTE_ALIGN(tlen, MLX5_WSEG_SIZE);
+ MLX5_ASSERT(room >= tlen);
+ room -= tlen;
+ /*
+ * Packet data are completely inline,
+ * we can try to free the packet.
+ */
+ if (likely(loc->pkts_sent == loc->mbuf_free)) {
+ /*
+ * All the packets from the burst beginning
+ * are inline, we can free mbufs directly
+ * from the origin array on tx_burst exit().
+ */
+ loc->mbuf_free++;
+ goto next_mbuf;
+ }
+ /*
+ * In order no to call rte_pktmbuf_free_seg() here,
+ * in the most inner loop (that might be very
+ * expensive) we just save the mbuf in elts.
+ */
+ txq->elts[txq->elts_head++ & txq->elts_m] = loc->mbuf;
+ loc->elts_free--;
+ goto next_mbuf;
+pointer_empw:
+ /*
+ * No pointer and inline descriptor
+ * intermix for legacy MPW sessions.
+ */
+ if (MLX5_TXOFF_CONFIG(MPW) &&
+ part != room &&
+ wqem->dseg[0].bcount == RTE_BE32(0))
+ break;
+ /*
+ * Not inlinable VLAN packets are
+ * proceeded outside of this routine.
+ */
+ MLX5_ASSERT(room >= MLX5_WQE_DSEG_SIZE);
+ if (MLX5_TXOFF_CONFIG(VLAN))
+ MLX5_ASSERT(!(loc->mbuf->ol_flags &
+ PKT_TX_VLAN_PKT));
+ mlx5_tx_dseg_ptr(txq, loc, dseg, dptr, dlen, olx);
+ /* We have to store mbuf in elts.*/
+ txq->elts[txq->elts_head++ & txq->elts_m] = loc->mbuf;
+ loc->elts_free--;
+ room -= MLX5_WQE_DSEG_SIZE;
+ /* Ring buffer wraparound is checked at the loop end.*/
+ ++dseg;
+next_mbuf:
+#ifdef MLX5_PMD_SOFT_COUNTERS
+ /* Update sent data bytes counter. */
+ slen += dlen;
+#endif
+ loc->pkts_sent++;
+ pkts_n--;
+ if (unlikely(!pkts_n || !loc->elts_free)) {
+ /*
+ * We have no resources/packets to
+ * continue build descriptors.
+ */
+ part -= room;
+ mlx5_tx_idone_empw(txq, loc, part,
+ slen, wqem, olx);
+ return MLX5_TXCMP_CODE_EXIT;
+ }
+ loc->mbuf = *pkts++;
+ if (likely(pkts_n > 1))
+ rte_prefetch0(*pkts);
+ ret = mlx5_tx_able_to_empw(txq, loc, olx, true);
+ /*
+ * Unroll the completion code to avoid
+ * returning variable value - it results in
+ * unoptimized sequent checking in caller.
+ */
+ if (ret == MLX5_TXCMP_CODE_MULTI) {
+ part -= room;
+ mlx5_tx_idone_empw(txq, loc, part,
+ slen, wqem, olx);
+ if (unlikely(!loc->elts_free ||
+ !loc->wqe_free))
+ return MLX5_TXCMP_CODE_EXIT;
+ return MLX5_TXCMP_CODE_MULTI;
+ }
+ MLX5_ASSERT(NB_SEGS(loc->mbuf) == 1);
+ if (ret == MLX5_TXCMP_CODE_TSO) {
+ part -= room;
+ mlx5_tx_idone_empw(txq, loc, part,
+ slen, wqem, olx);
+ if (unlikely(!loc->elts_free ||
+ !loc->wqe_free))
+ return MLX5_TXCMP_CODE_EXIT;
+ return MLX5_TXCMP_CODE_TSO;
+ }
+ if (ret == MLX5_TXCMP_CODE_SINGLE) {
+ part -= room;
+ mlx5_tx_idone_empw(txq, loc, part,
+ slen, wqem, olx);
+ if (unlikely(!loc->elts_free ||
+ !loc->wqe_free))
+ return MLX5_TXCMP_CODE_EXIT;
+ return MLX5_TXCMP_CODE_SINGLE;
+ }
+ if (ret != MLX5_TXCMP_CODE_EMPW) {
+ MLX5_ASSERT(false);
+ part -= room;
+ mlx5_tx_idone_empw(txq, loc, part,
+ slen, wqem, olx);
+ return MLX5_TXCMP_CODE_ERROR;
+ }
+ /* Check if we have minimal room left. */
+ nlim--;
+ if (unlikely(!nlim || room < MLX5_WQE_DSEG_SIZE))
+ break;
+ /*
+ * Check whether packet parameters coincide
+ * within assumed eMPW batch:
+ * - check sum settings
+ * - metadata value
+ * - software parser settings
+ * - packets length (legacy MPW only)
+ * - scheduling is not required
+ */
+ if (!mlx5_tx_match_empw(txq, &wqem->eseg,
+ loc, dlen, olx))
+ break;
+ /* Packet attributes match, continue the same eMPW. */
+ if ((uintptr_t)dseg >= (uintptr_t)txq->wqes_end)
+ dseg = (struct mlx5_wqe_dseg *)txq->wqes;
+ }
+ /*
+ * We get here to close an existing eMPW
+ * session and start the new one.
+ */
+ MLX5_ASSERT(pkts_n);
+ part -= room;
+ if (unlikely(!part))
+ return MLX5_TXCMP_CODE_EXIT;
+ mlx5_tx_idone_empw(txq, loc, part, slen, wqem, olx);
+ if (unlikely(!loc->elts_free ||
+ !loc->wqe_free))
+ return MLX5_TXCMP_CODE_EXIT;
+ /* Continue the loop with new eMPW session. */
+ }
+ MLX5_ASSERT(false);
+}
+
+/**
+ * The routine sends packets with ordinary MLX5_OPCODE_SEND.
+ * Data inlining and VLAN insertion are supported.
+ */
+static __rte_always_inline enum mlx5_txcmp_code
+mlx5_tx_burst_single_send(struct mlx5_txq_data *__rte_restrict txq,
+ struct rte_mbuf **__rte_restrict pkts,
+ unsigned int pkts_n,
+ struct mlx5_txq_local *__rte_restrict loc,
+ unsigned int olx)
+{
+ /*
+ * Subroutine is the part of mlx5_tx_burst_single()
+ * and sends single-segment packet with SEND opcode.
+ */
+ MLX5_ASSERT(loc->elts_free && loc->wqe_free);
+ MLX5_ASSERT(pkts_n > loc->pkts_sent);
+ pkts += loc->pkts_sent + 1;
+ pkts_n -= loc->pkts_sent;
+ for (;;) {
+ struct mlx5_wqe *__rte_restrict wqe;
+ enum mlx5_txcmp_code ret;
+
+ MLX5_ASSERT(NB_SEGS(loc->mbuf) == 1);
+ if (MLX5_TXOFF_CONFIG(TXPP)) {
+ enum mlx5_txcmp_code wret;
+
+ /* Generate WAIT for scheduling if requested. */
+ wret = mlx5_tx_schedule_send(txq, loc, olx);
+ if (wret == MLX5_TXCMP_CODE_EXIT)
+ return MLX5_TXCMP_CODE_EXIT;
+ if (wret == MLX5_TXCMP_CODE_ERROR)
+ return MLX5_TXCMP_CODE_ERROR;
+ }
+ if (MLX5_TXOFF_CONFIG(INLINE)) {
+ unsigned int inlen, vlan = 0;
+
+ inlen = rte_pktmbuf_data_len(loc->mbuf);
+ if (MLX5_TXOFF_CONFIG(VLAN) &&
+ loc->mbuf->ol_flags & PKT_TX_VLAN_PKT) {
+ vlan = sizeof(struct rte_vlan_hdr);
+ inlen += vlan;
+ }
+ /*
+ * If inlining is enabled at configuration time
+ * the limit must be not less than minimal size.
+ * Otherwise we would do extra check for data
+ * size to avoid crashes due to length overflow.
+ */
+ MLX5_ASSERT(txq->inlen_send >=
+ MLX5_ESEG_MIN_INLINE_SIZE);
+ if (inlen <= txq->inlen_send) {
+ unsigned int seg_n, wqe_n;
+
+ rte_prefetch0(rte_pktmbuf_mtod
+ (loc->mbuf, uint8_t *));
+ /* Check against minimal length. */
+ if (inlen <= MLX5_ESEG_MIN_INLINE_SIZE)
+ return MLX5_TXCMP_CODE_ERROR;
+ if (loc->mbuf->ol_flags &
+ PKT_TX_DYNF_NOINLINE) {
+ /*
+ * The hint flag not to inline packet
+ * data is set. Check whether we can
+ * follow the hint.
+ */
+ if ((!MLX5_TXOFF_CONFIG(EMPW) &&
+ txq->inlen_mode) ||
+ (MLX5_TXOFF_CONFIG(MPW) &&
+ txq->inlen_mode)) {
+ if (inlen <= txq->inlen_send)
+ goto single_inline;
+ /*
+ * The hardware requires the
+ * minimal inline data header.
+ */
+ goto single_min_inline;
+ }
+ if (MLX5_TXOFF_CONFIG(VLAN) &&
+ vlan && !txq->vlan_en) {
+ /*
+ * We must insert VLAN tag
+ * by software means.
+ */
+ goto single_part_inline;
+ }
+ goto single_no_inline;
+ }
+single_inline:
+ /*
+ * Completely inlined packet data WQE:
+ * - Control Segment, SEND opcode
+ * - Ethernet Segment, no VLAN insertion
+ * - Data inlined, VLAN optionally inserted
+ * - Alignment to MLX5_WSEG_SIZE
+ * Have to estimate amount of WQEBBs
+ */
+ seg_n = (inlen + 3 * MLX5_WSEG_SIZE -
+ MLX5_ESEG_MIN_INLINE_SIZE +
+ MLX5_WSEG_SIZE - 1) / MLX5_WSEG_SIZE;
+ /* Check if there are enough WQEBBs. */
+ wqe_n = (seg_n + 3) / 4;
+ if (wqe_n > loc->wqe_free)
+ return MLX5_TXCMP_CODE_EXIT;
+ wqe = txq->wqes + (txq->wqe_ci & txq->wqe_m);
+ loc->wqe_last = wqe;
+ mlx5_tx_cseg_init(txq, loc, wqe, seg_n,
+ MLX5_OPCODE_SEND, olx);
+ mlx5_tx_eseg_data(txq, loc, wqe,
+ vlan, inlen, 0, olx);
+ txq->wqe_ci += wqe_n;
+ loc->wqe_free -= wqe_n;
+ /*
+ * Packet data are completely inlined,
+ * free the packet immediately.
+ */
+ rte_pktmbuf_free_seg(loc->mbuf);
+ } else if ((!MLX5_TXOFF_CONFIG(EMPW) ||
+ MLX5_TXOFF_CONFIG(MPW)) &&
+ txq->inlen_mode) {
+ /*
+ * If minimal inlining is requested the eMPW
+ * feature should be disabled due to data is
+ * inlined into Ethernet Segment, which can
+ * not contain inlined data for eMPW due to
+ * segment shared for all packets.
+ */
+ struct mlx5_wqe_dseg *__rte_restrict dseg;
+ unsigned int ds;
+ uint8_t *dptr;
+
+ /*
+ * The inline-mode settings require
+ * to inline the specified amount of
+ * data bytes to the Ethernet Segment.
+ * We should check the free space in
+ * WQE ring buffer to inline partially.
+ */
+single_min_inline:
+ MLX5_ASSERT(txq->inlen_send >= txq->inlen_mode);
+ MLX5_ASSERT(inlen > txq->inlen_mode);
+ MLX5_ASSERT(txq->inlen_mode >=
+ MLX5_ESEG_MIN_INLINE_SIZE);
+ /*
+ * Check whether there are enough free WQEBBs:
+ * - Control Segment
+ * - Ethernet Segment
+ * - First Segment of inlined Ethernet data
+ * - ... data continued ...
+ * - Finishing Data Segment of pointer type
+ */
+ ds = (MLX5_WQE_CSEG_SIZE +
+ MLX5_WQE_ESEG_SIZE +
+ MLX5_WQE_DSEG_SIZE +
+ txq->inlen_mode -
+ MLX5_ESEG_MIN_INLINE_SIZE +
+ MLX5_WQE_DSEG_SIZE +
+ MLX5_WSEG_SIZE - 1) / MLX5_WSEG_SIZE;
+ if (loc->wqe_free < ((ds + 3) / 4))
+ return MLX5_TXCMP_CODE_EXIT;
+ /*
+ * Build the ordinary SEND WQE:
+ * - Control Segment
+ * - Ethernet Segment, inline inlen_mode bytes
+ * - Data Segment of pointer type
+ */
+ wqe = txq->wqes + (txq->wqe_ci & txq->wqe_m);
+ loc->wqe_last = wqe;
+ mlx5_tx_cseg_init(txq, loc, wqe, ds,
+ MLX5_OPCODE_SEND, olx);
+ dseg = mlx5_tx_eseg_data(txq, loc, wqe, vlan,
+ txq->inlen_mode,
+ 0, olx);
+ dptr = rte_pktmbuf_mtod(loc->mbuf, uint8_t *) +
+ txq->inlen_mode - vlan;
+ inlen -= txq->inlen_mode;
+ mlx5_tx_dseg_ptr(txq, loc, dseg,
+ dptr, inlen, olx);
+ /*
+ * WQE is built, update the loop parameters
+ * and got to the next packet.
+ */
+ txq->wqe_ci += (ds + 3) / 4;
+ loc->wqe_free -= (ds + 3) / 4;
+ /* We have to store mbuf in elts.*/
+ MLX5_ASSERT(MLX5_TXOFF_CONFIG(INLINE));
+ txq->elts[txq->elts_head++ & txq->elts_m] =
+ loc->mbuf;
+ --loc->elts_free;
+ } else {
+ uint8_t *dptr;
+ unsigned int dlen;
+
+ /*
+ * Partially inlined packet data WQE, we have
+ * some space in title WQEBB, we can fill it
+ * with some packet data. It takes one WQEBB,
+ * it is available, no extra space check:
+ * - Control Segment, SEND opcode
+ * - Ethernet Segment, no VLAN insertion
+ * - MLX5_ESEG_MIN_INLINE_SIZE bytes of Data
+ * - Data Segment, pointer type
+ *
+ * We also get here if VLAN insertion is not
+ * supported by HW, the inline is enabled.
+ */
+single_part_inline:
+ wqe = txq->wqes + (txq->wqe_ci & txq->wqe_m);
+ loc->wqe_last = wqe;
+ mlx5_tx_cseg_init(txq, loc, wqe, 4,
+ MLX5_OPCODE_SEND, olx);
+ mlx5_tx_eseg_dmin(txq, loc, wqe, vlan, olx);
+ dptr = rte_pktmbuf_mtod(loc->mbuf, uint8_t *) +
+ MLX5_ESEG_MIN_INLINE_SIZE - vlan;
+ /*
+ * The length check is performed above, by
+ * comparing with txq->inlen_send. We should
+ * not get overflow here.
+ */
+ MLX5_ASSERT(inlen > MLX5_ESEG_MIN_INLINE_SIZE);
+ dlen = inlen - MLX5_ESEG_MIN_INLINE_SIZE;
+ mlx5_tx_dseg_ptr(txq, loc, &wqe->dseg[1],
+ dptr, dlen, olx);
+ ++txq->wqe_ci;
+ --loc->wqe_free;
+ /* We have to store mbuf in elts.*/
+ MLX5_ASSERT(MLX5_TXOFF_CONFIG(INLINE));
+ txq->elts[txq->elts_head++ & txq->elts_m] =
+ loc->mbuf;
+ --loc->elts_free;
+ }
+#ifdef MLX5_PMD_SOFT_COUNTERS
+ /* Update sent data bytes counter. */
+ txq->stats.obytes += vlan +
+ rte_pktmbuf_data_len(loc->mbuf);
+#endif
+ } else {
+ /*
+ * No inline at all, it means the CPU cycles saving
+ * is prioritized at configuration, we should not
+ * copy any packet data to WQE.
+ *
+ * SEND WQE, one WQEBB:
+ * - Control Segment, SEND opcode
+ * - Ethernet Segment, optional VLAN, no inline
+ * - Data Segment, pointer type
+ */
+single_no_inline:
+ wqe = txq->wqes + (txq->wqe_ci & txq->wqe_m);
+ loc->wqe_last = wqe;
+ mlx5_tx_cseg_init(txq, loc, wqe, 3,
+ MLX5_OPCODE_SEND, olx);
+ mlx5_tx_eseg_none(txq, loc, wqe, olx);
+ mlx5_tx_dseg_ptr
+ (txq, loc, &wqe->dseg[0],
+ rte_pktmbuf_mtod(loc->mbuf, uint8_t *),
+ rte_pktmbuf_data_len(loc->mbuf), olx);
+ ++txq->wqe_ci;
+ --loc->wqe_free;
+ /*
+ * We should not store mbuf pointer in elts
+ * if no inlining is configured, this is done
+ * by calling routine in a batch copy.
+ */
+ MLX5_ASSERT(!MLX5_TXOFF_CONFIG(INLINE));
+ --loc->elts_free;
+#ifdef MLX5_PMD_SOFT_COUNTERS
+ /* Update sent data bytes counter. */
+ txq->stats.obytes += rte_pktmbuf_data_len(loc->mbuf);
+ if (MLX5_TXOFF_CONFIG(VLAN) &&
+ loc->mbuf->ol_flags & PKT_TX_VLAN_PKT)
+ txq->stats.obytes +=
+ sizeof(struct rte_vlan_hdr);
+#endif
+ }
+ ++loc->pkts_sent;
+ --pkts_n;
+ if (unlikely(!pkts_n || !loc->elts_free || !loc->wqe_free))
+ return MLX5_TXCMP_CODE_EXIT;
+ loc->mbuf = *pkts++;
+ if (pkts_n > 1)
+ rte_prefetch0(*pkts);
+ ret = mlx5_tx_able_to_empw(txq, loc, olx, true);
+ if (unlikely(ret != MLX5_TXCMP_CODE_SINGLE))
+ return ret;
+ }
+ MLX5_ASSERT(false);
+}
+
+static __rte_always_inline enum mlx5_txcmp_code
+mlx5_tx_burst_single(struct mlx5_txq_data *__rte_restrict txq,
+ struct rte_mbuf **__rte_restrict pkts,
+ unsigned int pkts_n,
+ struct mlx5_txq_local *__rte_restrict loc,
+ unsigned int olx)
+{
+ enum mlx5_txcmp_code ret;
+
+ ret = mlx5_tx_able_to_empw(txq, loc, olx, false);
+ if (ret == MLX5_TXCMP_CODE_SINGLE)
+ goto ordinary_send;
+ MLX5_ASSERT(ret == MLX5_TXCMP_CODE_EMPW);
+ for (;;) {
+ /* Optimize for inline/no inline eMPW send. */
+ ret = (MLX5_TXOFF_CONFIG(INLINE)) ?
+ mlx5_tx_burst_empw_inline
+ (txq, pkts, pkts_n, loc, olx) :
+ mlx5_tx_burst_empw_simple
+ (txq, pkts, pkts_n, loc, olx);
+ if (ret != MLX5_TXCMP_CODE_SINGLE)
+ return ret;
+ /* The resources to send one packet should remain. */
+ MLX5_ASSERT(loc->elts_free && loc->wqe_free);
+ordinary_send:
+ ret = mlx5_tx_burst_single_send(txq, pkts, pkts_n, loc, olx);
+ MLX5_ASSERT(ret != MLX5_TXCMP_CODE_SINGLE);
+ if (ret != MLX5_TXCMP_CODE_EMPW)
+ return ret;
+ /* The resources to send one packet should remain. */
+ MLX5_ASSERT(loc->elts_free && loc->wqe_free);
+ }
+}
+
+/**
+ * DPDK Tx callback template. This is configured template used to generate
+ * routines optimized for specified offload setup.
+ * One of this generated functions is chosen at SQ configuration time.
+ *
+ * @param txq
+ * Generic pointer to TX queue structure.
+ * @param[in] pkts
+ * Packets to transmit.
+ * @param pkts_n
+ * Number of packets in array.
+ * @param olx
+ * Configured offloads mask, presents the bits of MLX5_TXOFF_CONFIG_xxx
+ * values. Should be static to take compile time static configuration
+ * advantages.
+ *
+ * @return
+ * Number of packets successfully transmitted (<= pkts_n).
+ */
+static __rte_always_inline uint16_t
+mlx5_tx_burst_tmpl(struct mlx5_txq_data *__rte_restrict txq,
+ struct rte_mbuf **__rte_restrict pkts,
+ uint16_t pkts_n,
+ unsigned int olx)
+{
+ struct mlx5_txq_local loc;
+ enum mlx5_txcmp_code ret;
+ unsigned int part;
+
+ MLX5_ASSERT(txq->elts_s >= (uint16_t)(txq->elts_head - txq->elts_tail));
+ MLX5_ASSERT(txq->wqe_s >= (uint16_t)(txq->wqe_ci - txq->wqe_pi));
+ if (unlikely(!pkts_n))
+ return 0;
+ if (MLX5_TXOFF_CONFIG(INLINE))
+ loc.mbuf_free = 0;
+ loc.pkts_sent = 0;
+ loc.pkts_copy = 0;
+ loc.wqe_last = NULL;
+
+send_loop:
+ loc.pkts_loop = loc.pkts_sent;
+ /*
+ * Check if there are some CQEs, if any:
+ * - process an encountered errors
+ * - process the completed WQEs
+ * - free related mbufs
+ * - doorbell the NIC about processed CQEs
+ */
+ rte_prefetch0(*(pkts + loc.pkts_sent));
+ mlx5_tx_handle_completion(txq, olx);
+ /*
+ * Calculate the number of available resources - elts and WQEs.
+ * There are two possible different scenarios:
+ * - no data inlining into WQEs, one WQEBB may contains up to
+ * four packets, in this case elts become scarce resource
+ * - data inlining into WQEs, one packet may require multiple
+ * WQEBBs, the WQEs become the limiting factor.
+ */
+ MLX5_ASSERT(txq->elts_s >= (uint16_t)(txq->elts_head - txq->elts_tail));
+ loc.elts_free = txq->elts_s -
+ (uint16_t)(txq->elts_head - txq->elts_tail);
+ MLX5_ASSERT(txq->wqe_s >= (uint16_t)(txq->wqe_ci - txq->wqe_pi));
+ loc.wqe_free = txq->wqe_s -
+ (uint16_t)(txq->wqe_ci - txq->wqe_pi);
+ if (unlikely(!loc.elts_free || !loc.wqe_free))
+ goto burst_exit;
+ for (;;) {
+ /*
+ * Fetch the packet from array. Usually this is the first
+ * packet in series of multi/single segment packets.
+ */
+ loc.mbuf = *(pkts + loc.pkts_sent);
+ /* Dedicated branch for multi-segment packets. */
+ if (MLX5_TXOFF_CONFIG(MULTI) &&
+ unlikely(NB_SEGS(loc.mbuf) > 1)) {
+ /*
+ * Multi-segment packet encountered.
+ * Hardware is able to process it only
+ * with SEND/TSO opcodes, one packet
+ * per WQE, do it in dedicated routine.
+ */
+enter_send_multi:
+ MLX5_ASSERT(loc.pkts_sent >= loc.pkts_copy);
+ part = loc.pkts_sent - loc.pkts_copy;
+ if (!MLX5_TXOFF_CONFIG(INLINE) && part) {
+ /*
+ * There are some single-segment mbufs not
+ * stored in elts. The mbufs must be in the
+ * same order as WQEs, so we must copy the
+ * mbufs to elts here, before the coming
+ * multi-segment packet mbufs is appended.
+ */
+ mlx5_tx_copy_elts(txq, pkts + loc.pkts_copy,
+ part, olx);
+ loc.pkts_copy = loc.pkts_sent;
+ }
+ MLX5_ASSERT(pkts_n > loc.pkts_sent);
+ ret = mlx5_tx_burst_mseg(txq, pkts, pkts_n, &loc, olx);
+ if (!MLX5_TXOFF_CONFIG(INLINE))
+ loc.pkts_copy = loc.pkts_sent;
+ /*
+ * These returned code checks are supposed
+ * to be optimized out due to routine inlining.
+ */
+ if (ret == MLX5_TXCMP_CODE_EXIT) {
+ /*
+ * The routine returns this code when
+ * all packets are sent or there is no
+ * enough resources to complete request.
+ */
+ break;
+ }
+ if (ret == MLX5_TXCMP_CODE_ERROR) {
+ /*
+ * The routine returns this code when some error
+ * in the incoming packets format occurred.
+ */
+ txq->stats.oerrors++;
+ break;
+ }
+ if (ret == MLX5_TXCMP_CODE_SINGLE) {
+ /*
+ * The single-segment packet was encountered
+ * in the array, try to send it with the
+ * best optimized way, possible engaging eMPW.
+ */
+ goto enter_send_single;
+ }
+ if (MLX5_TXOFF_CONFIG(TSO) &&
+ ret == MLX5_TXCMP_CODE_TSO) {
+ /*
+ * The single-segment TSO packet was
+ * encountered in the array.
+ */
+ goto enter_send_tso;
+ }
+ /* We must not get here. Something is going wrong. */
+ MLX5_ASSERT(false);
+ txq->stats.oerrors++;
+ break;
+ }
+ /* Dedicated branch for single-segment TSO packets. */
+ if (MLX5_TXOFF_CONFIG(TSO) &&
+ unlikely(loc.mbuf->ol_flags & PKT_TX_TCP_SEG)) {
+ /*
+ * TSO might require special way for inlining
+ * (dedicated parameters) and is sent with
+ * MLX5_OPCODE_TSO opcode only, provide this
+ * in dedicated branch.
+ */
+enter_send_tso:
+ MLX5_ASSERT(NB_SEGS(loc.mbuf) == 1);
+ MLX5_ASSERT(pkts_n > loc.pkts_sent);
+ ret = mlx5_tx_burst_tso(txq, pkts, pkts_n, &loc, olx);
+ /*
+ * These returned code checks are supposed
+ * to be optimized out due to routine inlining.
+ */
+ if (ret == MLX5_TXCMP_CODE_EXIT)
+ break;
+ if (ret == MLX5_TXCMP_CODE_ERROR) {
+ txq->stats.oerrors++;
+ break;
+ }
+ if (ret == MLX5_TXCMP_CODE_SINGLE)
+ goto enter_send_single;
+ if (MLX5_TXOFF_CONFIG(MULTI) &&
+ ret == MLX5_TXCMP_CODE_MULTI) {
+ /*
+ * The multi-segment packet was
+ * encountered in the array.
+ */
+ goto enter_send_multi;
+ }
+ /* We must not get here. Something is going wrong. */
+ MLX5_ASSERT(false);
+ txq->stats.oerrors++;
+ break;
+ }
+ /*
+ * The dedicated branch for the single-segment packets
+ * without TSO. Often these ones can be sent using
+ * MLX5_OPCODE_EMPW with multiple packets in one WQE.
+ * The routine builds the WQEs till it encounters
+ * the TSO or multi-segment packet (in case if these
+ * offloads are requested at SQ configuration time).
+ */
+enter_send_single:
+ MLX5_ASSERT(pkts_n > loc.pkts_sent);
+ ret = mlx5_tx_burst_single(txq, pkts, pkts_n, &loc, olx);
+ /*
+ * These returned code checks are supposed
+ * to be optimized out due to routine inlining.
+ */
+ if (ret == MLX5_TXCMP_CODE_EXIT)
+ break;
+ if (ret == MLX5_TXCMP_CODE_ERROR) {
+ txq->stats.oerrors++;
+ break;
+ }
+ if (MLX5_TXOFF_CONFIG(MULTI) &&
+ ret == MLX5_TXCMP_CODE_MULTI) {
+ /*
+ * The multi-segment packet was
+ * encountered in the array.
+ */
+ goto enter_send_multi;
+ }
+ if (MLX5_TXOFF_CONFIG(TSO) &&
+ ret == MLX5_TXCMP_CODE_TSO) {
+ /*
+ * The single-segment TSO packet was
+ * encountered in the array.
+ */
+ goto enter_send_tso;
+ }
+ /* We must not get here. Something is going wrong. */
+ MLX5_ASSERT(false);
+ txq->stats.oerrors++;
+ break;
+ }
+ /*
+ * Main Tx loop is completed, do the rest:
+ * - set completion request if thresholds are reached
+ * - doorbell the hardware
+ * - copy the rest of mbufs to elts (if any)
+ */
+ MLX5_ASSERT(MLX5_TXOFF_CONFIG(INLINE) ||
+ loc.pkts_sent >= loc.pkts_copy);
+ /* Take a shortcut if nothing is sent. */
+ if (unlikely(loc.pkts_sent == loc.pkts_loop))
+ goto burst_exit;
+ /* Request CQE generation if limits are reached. */
+ mlx5_tx_request_completion(txq, &loc, olx);
+ /*
+ * Ring QP doorbell immediately after WQE building completion
+ * to improve latencies. The pure software related data treatment
+ * can be completed after doorbell. Tx CQEs for this SQ are
+ * processed in this thread only by the polling.
+ *
+ * The rdma core library can map doorbell register in two ways,
+ * depending on the environment variable "MLX5_SHUT_UP_BF":
+ *
+ * - as regular cached memory, the variable is either missing or
+ * set to zero. This type of mapping may cause the significant
+ * doorbell register writing latency and requires explicit memory
+ * write barrier to mitigate this issue and prevent write combining.
+ *
+ * - as non-cached memory, the variable is present and set to not "0"
+ * value. This type of mapping may cause performance impact under
+ * heavy loading conditions but the explicit write memory barrier is
+ * not required and it may improve core performance.
+ *
+ * - the legacy behaviour (prior 19.08 release) was to use some
+ * heuristics to decide whether write memory barrier should
+ * be performed. This behavior is supported with specifying
+ * tx_db_nc=2, write barrier is skipped if application provides
+ * the full recommended burst of packets, it supposes the next
+ * packets are coming and the write barrier will be issued on
+ * the next burst (after descriptor writing, at least).
+ */
+ mlx5_tx_dbrec_cond_wmb(txq, loc.wqe_last, !txq->db_nc &&
+ (!txq->db_heu || pkts_n % MLX5_TX_DEFAULT_BURST));
+ /* Not all of the mbufs may be stored into elts yet. */
+ part = MLX5_TXOFF_CONFIG(INLINE) ? 0 : loc.pkts_sent - loc.pkts_copy;
+ if (!MLX5_TXOFF_CONFIG(INLINE) && part) {
+ /*
+ * There are some single-segment mbufs not stored in elts.
+ * It can be only if the last packet was single-segment.
+ * The copying is gathered into one place due to it is
+ * a good opportunity to optimize that with SIMD.
+ * Unfortunately if inlining is enabled the gaps in pointer
+ * array may happen due to early freeing of the inlined mbufs.
+ */
+ mlx5_tx_copy_elts(txq, pkts + loc.pkts_copy, part, olx);
+ loc.pkts_copy = loc.pkts_sent;
+ }
+ MLX5_ASSERT(txq->elts_s >= (uint16_t)(txq->elts_head - txq->elts_tail));
+ MLX5_ASSERT(txq->wqe_s >= (uint16_t)(txq->wqe_ci - txq->wqe_pi));
+ if (pkts_n > loc.pkts_sent) {
+ /*
+ * If burst size is large there might be no enough CQE
+ * fetched from completion queue and no enough resources
+ * freed to send all the packets.
+ */
+ goto send_loop;
+ }
+burst_exit:
+#ifdef MLX5_PMD_SOFT_COUNTERS
+ /* Increment sent packets counter. */
+ txq->stats.opackets += loc.pkts_sent;
+#endif
+ if (MLX5_TXOFF_CONFIG(INLINE) && loc.mbuf_free)
+ __mlx5_tx_free_mbuf(txq, pkts, loc.mbuf_free, olx);
+ return loc.pkts_sent;
+}
+
#endif /* RTE_PMD_MLX5_TX_H_ */
--
1.8.3.1
next prev parent reply other threads:[~2021-04-12 6:33 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-05 14:00 [dpdk-dev] [PATCH 0/6] net/mlx5: reduce Tx datapath compile time Michael Baum
2021-04-05 14:00 ` [dpdk-dev] [PATCH 1/6] net/mlx5: separate Rx function declarations to another file Michael Baum
2021-04-06 9:27 ` Slava Ovsiienko
2021-04-05 14:00 ` [dpdk-dev] [PATCH 2/6] net/mlx5: separate Rx function implementations to new file Michael Baum
2021-04-06 9:27 ` Slava Ovsiienko
2021-04-05 14:00 ` [dpdk-dev] [PATCH 3/6] net/mlx5: separate Tx function declarations to another file Michael Baum
2021-04-06 9:28 ` Slava Ovsiienko
2021-04-07 11:33 ` Raslan Darawsheh
2021-04-05 14:00 ` [dpdk-dev] [PATCH 4/6] net/mlx5: separate Tx burst template to header file Michael Baum
2021-04-06 9:28 ` Slava Ovsiienko
2021-04-05 14:00 ` [dpdk-dev] [PATCH 5/6] net/mlx5: separate Tx function implementations to new file Michael Baum
2021-04-06 9:29 ` Slava Ovsiienko
2021-04-05 14:00 ` [dpdk-dev] [PATCH 6/6] net/mlx5: separate Tx burst functions to different files Michael Baum
2021-04-06 9:30 ` Slava Ovsiienko
2021-04-06 9:33 ` [dpdk-dev] [PATCH 0/6] net/mlx5: reduce Tx datapath compile time David Marchand
2021-04-06 9:58 ` Slava Ovsiienko
2021-04-12 6:32 ` [dpdk-dev] [PATCH v2 " Michael Baum
2021-04-12 6:32 ` [dpdk-dev] [PATCH v2 1/6] net/mlx5: separate Rx function declarations to another file Michael Baum
2021-04-12 6:32 ` [dpdk-dev] [PATCH v2 2/6] net/mlx5: separate Rx function implementations to new file Michael Baum
2021-04-16 13:08 ` Ferruh Yigit
2021-04-12 6:32 ` [dpdk-dev] [PATCH v2 3/6] net/mlx5: separate Tx function declarations to another file Michael Baum
2021-04-12 6:32 ` Michael Baum [this message]
2021-04-12 6:32 ` [dpdk-dev] [PATCH v2 5/6] net/mlx5: separate Tx function implementations to new file Michael Baum
2021-04-12 6:32 ` [dpdk-dev] [PATCH v2 6/6] net/mlx5: separate Tx burst functions to different files Michael Baum
2021-04-15 6:27 ` [dpdk-dev] [PATCH v2 0/6] net/mlx5: reduce Tx datapath compile time Raslan Darawsheh
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