-/*-
- * BSD LICENSE
- *
- * Copyright 2015 6WIND S.A.
- * Copyright 2015 Mellanox.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of 6WIND S.A. nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright 2015 6WIND S.A.
+ * Copyright 2015-2019 Mellanox Technologies, Ltd
*/
#include <assert.h>
#include <rte_common.h>
#include <rte_branch_prediction.h>
#include <rte_ether.h>
+#include <rte_cycles.h>
#include "mlx5.h"
#include "mlx5_utils.h"
#include "mlx5_defs.h"
#include "mlx5_prm.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.*/
+
+/* 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 __rte_always_inline uint32_t
-rxq_cq_to_pkt_type(volatile struct mlx5_cqe *cqe);
+rxq_cq_to_pkt_type(struct mlx5_rxq_data *rxq, volatile struct mlx5_cqe *cqe);
static __rte_always_inline int
mlx5_rx_poll_len(struct mlx5_rxq_data *rxq, volatile struct mlx5_cqe *cqe,
- uint16_t cqe_cnt, uint32_t *rss_hash);
+ uint16_t cqe_cnt, volatile struct mlx5_mini_cqe8 **mcqe);
static __rte_always_inline uint32_t
-rxq_cq_to_ol_flags(struct mlx5_rxq_data *rxq, volatile struct mlx5_cqe *cqe);
+rxq_cq_to_ol_flags(volatile struct mlx5_cqe *cqe);
+
+static __rte_always_inline void
+rxq_cq_to_mbuf(struct mlx5_rxq_data *rxq, struct rte_mbuf *pkt,
+ volatile struct mlx5_cqe *cqe, uint32_t rss_hash_res);
+
+static __rte_always_inline void
+mprq_buf_replace(struct mlx5_rxq_data *rxq, uint16_t rq_idx,
+ const unsigned int strd_n);
+
+static int
+mlx5_queue_state_modify(struct rte_eth_dev *dev,
+ struct mlx5_mp_arg_queue_state_modify *sm);
+
+static inline void
+mlx5_lro_update_tcp_hdr(struct rte_tcp_hdr *restrict tcp,
+ volatile struct mlx5_cqe *restrict cqe,
+ uint32_t phcsum);
+
+static inline void
+mlx5_lro_update_hdr(uint8_t *restrict padd,
+ volatile struct mlx5_cqe *restrict cqe,
+ uint32_t len);
uint32_t mlx5_ptype_table[] __rte_cache_aligned = {
[0xff] = RTE_PTYPE_ALL_MASK, /* Last entry for errored packet. */
};
+uint8_t mlx5_cksum_table[1 << 10] __rte_cache_aligned;
+uint8_t mlx5_swp_types_table[1 << 10] __rte_cache_aligned;
+
/**
* Build a table to translate Rx completion flags to packet type.
*
* bit[6] = tunneled
* bit[7] = outer_l3_type
*/
+ /* L2 */
+ (*p)[0x00] = RTE_PTYPE_L2_ETHER;
/* L3 */
(*p)[0x01] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6_EXT_UNKNOWN |
RTE_PTYPE_L4_NONFRAG;
RTE_PTYPE_L4_TCP;
(*p)[0x06] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4_EXT_UNKNOWN |
RTE_PTYPE_L4_TCP;
+ (*p)[0x0d] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6_EXT_UNKNOWN |
+ RTE_PTYPE_L4_TCP;
+ (*p)[0x0e] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4_EXT_UNKNOWN |
+ RTE_PTYPE_L4_TCP;
+ (*p)[0x11] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6_EXT_UNKNOWN |
+ RTE_PTYPE_L4_TCP;
+ (*p)[0x12] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4_EXT_UNKNOWN |
+ RTE_PTYPE_L4_TCP;
/* UDP */
(*p)[0x09] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6_EXT_UNKNOWN |
RTE_PTYPE_L4_UDP;
RTE_PTYPE_L4_TCP;
(*p)[0x86] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4_EXT_UNKNOWN |
RTE_PTYPE_L4_TCP;
+ (*p)[0x8d] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6_EXT_UNKNOWN |
+ RTE_PTYPE_L4_TCP;
+ (*p)[0x8e] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4_EXT_UNKNOWN |
+ RTE_PTYPE_L4_TCP;
+ (*p)[0x91] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6_EXT_UNKNOWN |
+ RTE_PTYPE_L4_TCP;
+ (*p)[0x92] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4_EXT_UNKNOWN |
+ RTE_PTYPE_L4_TCP;
(*p)[0x89] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6_EXT_UNKNOWN |
RTE_PTYPE_L4_UDP;
(*p)[0x8a] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4_EXT_UNKNOWN |
RTE_PTYPE_L4_UDP;
/* Tunneled - L3 */
+ (*p)[0x40] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4_EXT_UNKNOWN;
(*p)[0x41] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4_EXT_UNKNOWN |
RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN |
RTE_PTYPE_INNER_L4_NONFRAG;
(*p)[0x42] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4_EXT_UNKNOWN |
RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN |
RTE_PTYPE_INNER_L4_NONFRAG;
+ (*p)[0xc0] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6_EXT_UNKNOWN;
(*p)[0xc1] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6_EXT_UNKNOWN |
RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN |
RTE_PTYPE_INNER_L4_NONFRAG;
/* Tunneled - TCP */
(*p)[0x45] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4_EXT_UNKNOWN |
RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN |
- RTE_PTYPE_L4_TCP;
+ RTE_PTYPE_INNER_L4_TCP;
(*p)[0x46] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4_EXT_UNKNOWN |
RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN |
- RTE_PTYPE_L4_TCP;
+ RTE_PTYPE_INNER_L4_TCP;
+ (*p)[0x4d] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4_EXT_UNKNOWN |
+ RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN |
+ RTE_PTYPE_INNER_L4_TCP;
+ (*p)[0x4e] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4_EXT_UNKNOWN |
+ RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN |
+ RTE_PTYPE_INNER_L4_TCP;
+ (*p)[0x51] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4_EXT_UNKNOWN |
+ RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN |
+ RTE_PTYPE_INNER_L4_TCP;
+ (*p)[0x52] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4_EXT_UNKNOWN |
+ RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN |
+ RTE_PTYPE_INNER_L4_TCP;
(*p)[0xc5] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6_EXT_UNKNOWN |
RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN |
- RTE_PTYPE_L4_TCP;
+ RTE_PTYPE_INNER_L4_TCP;
(*p)[0xc6] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6_EXT_UNKNOWN |
RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN |
- RTE_PTYPE_L4_TCP;
+ RTE_PTYPE_INNER_L4_TCP;
+ (*p)[0xcd] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6_EXT_UNKNOWN |
+ RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN |
+ RTE_PTYPE_INNER_L4_TCP;
+ (*p)[0xce] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6_EXT_UNKNOWN |
+ RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN |
+ RTE_PTYPE_INNER_L4_TCP;
+ (*p)[0xd1] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6_EXT_UNKNOWN |
+ RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN |
+ RTE_PTYPE_INNER_L4_TCP;
+ (*p)[0xd2] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6_EXT_UNKNOWN |
+ RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN |
+ RTE_PTYPE_INNER_L4_TCP;
/* Tunneled - UDP */
(*p)[0x49] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4_EXT_UNKNOWN |
RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN |
- RTE_PTYPE_L4_UDP;
+ RTE_PTYPE_INNER_L4_UDP;
(*p)[0x4a] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4_EXT_UNKNOWN |
RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN |
- RTE_PTYPE_L4_UDP;
+ RTE_PTYPE_INNER_L4_UDP;
(*p)[0xc9] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6_EXT_UNKNOWN |
RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN |
- RTE_PTYPE_L4_UDP;
+ RTE_PTYPE_INNER_L4_UDP;
(*p)[0xca] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6_EXT_UNKNOWN |
RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN |
- RTE_PTYPE_L4_UDP;
+ RTE_PTYPE_INNER_L4_UDP;
}
/**
- * Return the size of tailroom of WQ.
- *
- * @param txq
- * Pointer to TX queue structure.
- * @param addr
- * Pointer to tail of WQ.
- *
- * @return
- * Size of tailroom.
+ * Build a table to translate packet to checksum type of Verbs.
+ */
+void
+mlx5_set_cksum_table(void)
+{
+ unsigned int i;
+ uint8_t v;
+
+ /*
+ * 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
+ */
+ for (i = 0; i < RTE_DIM(mlx5_cksum_table); ++i) {
+ v = 0;
+ if (i & (1 << 9)) {
+ /* Tunneled packet. */
+ if (i & (1 << 8)) /* Outer IP. */
+ v |= MLX5_ETH_WQE_L3_CSUM;
+ if (i & (1 << 4)) /* Inner IP. */
+ v |= MLX5_ETH_WQE_L3_INNER_CSUM;
+ if (i & (3 << 2 | 1 << 0)) /* L4 or TSO. */
+ v |= MLX5_ETH_WQE_L4_INNER_CSUM;
+ } else {
+ /* No tunnel. */
+ if (i & (1 << 4)) /* IP. */
+ v |= MLX5_ETH_WQE_L3_CSUM;
+ if (i & (3 << 2 | 1 << 0)) /* L4 or TSO. */
+ v |= MLX5_ETH_WQE_L4_CSUM;
+ }
+ mlx5_cksum_table[i] = v;
+ }
+}
+
+/**
+ * Build a table to translate packet type of mbuf to SWP type of Verbs.
*/
-static inline size_t
-tx_mlx5_wq_tailroom(struct mlx5_txq_data *txq, void *addr)
+void
+mlx5_set_swp_types_table(void)
{
- size_t tailroom;
- tailroom = (uintptr_t)(txq->wqes) +
- (1 << txq->wqe_n) * MLX5_WQE_SIZE -
- (uintptr_t)addr;
- return tailroom;
+ unsigned int i;
+ uint8_t v;
+
+ /*
+ * 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
+ */
+ for (i = 0; i < RTE_DIM(mlx5_swp_types_table); ++i) {
+ v = 0;
+ if (i & (1 << 8))
+ v |= MLX5_ETH_WQE_L3_OUTER_IPV6;
+ if (i & (1 << 9))
+ v |= MLX5_ETH_WQE_L4_OUTER_UDP;
+ if (i & (1 << 4))
+ v |= MLX5_ETH_WQE_L3_INNER_IPV6;
+ if ((i & 3) == (PKT_TX_UDP_CKSUM >> 52))
+ v |= MLX5_ETH_WQE_L4_INNER_UDP;
+ mlx5_swp_types_table[i] = v;
+ }
}
/**
- * Copy data to tailroom of circular queue.
- *
- * @param dst
- * Pointer to destination.
- * @param src
- * Pointer to source.
- * @param n
- * Number of bytes to copy.
- * @param base
- * Pointer to head of queue.
- * @param tailroom
- * Size of tailroom from dst.
+ * 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
- * Pointer after copied data.
+ * Software Parser offsets packed in dword.
+ * Software Parser flags are set by pointer.
*/
-static inline void *
-mlx5_copy_to_wq(void *dst, const void *src, size_t n,
- void *base, size_t tailroom)
+static __rte_always_inline uint32_t
+txq_mbuf_to_swp(struct mlx5_txq_local *restrict loc,
+ uint8_t *swp_flags,
+ unsigned int olx)
{
- void *ret;
+ uint64_t ol, tunnel;
+ unsigned int idx, off;
+ uint32_t set;
- if (n > tailroom) {
- rte_memcpy(dst, src, tailroom);
- rte_memcpy(base, (void *)((uintptr_t)src + tailroom),
- n - tailroom);
- ret = (uint8_t *)base + n - tailroom;
- } else {
- rte_memcpy(dst, src, n);
- ret = (n == tailroom) ? base : (uint8_t *)dst + n;
+ 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. */
+ }
}
- return ret;
+ set = rte_cpu_to_le_32(set);
+ return set;
}
/**
- * DPDK callback to check the status of a tx descriptor.
+ * Convert the Checksum offloads to Verbs.
*
- * @param tx_queue
- * The tx queue.
- * @param[in] offset
- * The index of the descriptor in the ring.
+ * @param buf
+ * Pointer to the mbuf.
*
* @return
- * The status of the tx descriptor.
+ * Converted checksum flags.
*/
-int
-mlx5_tx_descriptor_status(void *tx_queue, uint16_t offset)
+static __rte_always_inline uint8_t
+txq_ol_cksum_to_cs(struct rte_mbuf *buf)
{
- struct mlx5_txq_data *txq = tx_queue;
- uint16_t used;
+ 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;
- mlx5_tx_complete(txq);
- used = txq->elts_head - txq->elts_tail;
- if (offset < used)
- return RTE_ETH_TX_DESC_FULL;
- return RTE_ETH_TX_DESC_DONE;
+ /*
+ * 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];
}
/**
- * DPDK callback to check the status of a rx descriptor.
+ * Internal function to compute the number of used descriptors in an RX queue
*
- * @param rx_queue
- * The rx queue.
- * @param[in] offset
- * The index of the descriptor in the ring.
+ * @param rxq
+ * The Rx queue.
*
* @return
- * The status of the tx descriptor.
+ * The number of used rx descriptor.
*/
-int
-mlx5_rx_descriptor_status(void *rx_queue, uint16_t offset)
+static uint32_t
+rx_queue_count(struct mlx5_rxq_data *rxq)
{
- struct mlx5_rxq_data *rxq = rx_queue;
struct rxq_zip *zip = &rxq->zip;
volatile struct mlx5_cqe *cqe;
const unsigned int cqe_n = (1 << rxq->cqe_n);
cq_ci = rxq->cq_ci;
}
cqe = &(*rxq->cqes)[cq_ci & cqe_cnt];
- while (check_cqe(cqe, cqe_n, cq_ci) == 0) {
+ while (check_cqe(cqe, cqe_n, cq_ci) != MLX5_CQE_STATUS_HW_OWN) {
int8_t op_own;
unsigned int n;
cqe = &(*rxq->cqes)[cq_ci & cqe_cnt];
}
used = RTE_MIN(used, (1U << rxq->elts_n) - 1);
- if (offset < used)
- return RTE_ETH_RX_DESC_DONE;
- return RTE_ETH_RX_DESC_AVAIL;
+ return used;
}
/**
- * DPDK callback for TX.
+ * DPDK callback to check the status of a rx descriptor.
*
- * @param dpdk_txq
- * Generic pointer to TX queue structure.
- * @param[in] pkts
- * Packets to transmit.
- * @param pkts_n
- * Number of packets in array.
+ * @param rx_queue
+ * The Rx queue.
+ * @param[in] offset
+ * The index of the descriptor in the ring.
*
* @return
- * Number of packets successfully transmitted (<= pkts_n).
+ * The status of the tx descriptor.
*/
-uint16_t
-mlx5_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n)
+int
+mlx5_rx_descriptor_status(void *rx_queue, uint16_t offset)
{
- struct mlx5_txq_data *txq = (struct mlx5_txq_data *)dpdk_txq;
- uint16_t elts_head = txq->elts_head;
- const uint16_t elts_n = 1 << txq->elts_n;
- const uint16_t elts_m = elts_n - 1;
- unsigned int i = 0;
- unsigned int j = 0;
- unsigned int k = 0;
- uint16_t max_elts;
- unsigned int max_inline = txq->max_inline;
- const unsigned int inline_en = !!max_inline && txq->inline_en;
- uint16_t max_wqe;
- unsigned int comp;
- volatile struct mlx5_wqe_v *wqe = NULL;
- volatile struct mlx5_wqe_ctrl *last_wqe = NULL;
- unsigned int segs_n = 0;
- struct rte_mbuf *buf = NULL;
- uint8_t *raw;
-
- if (unlikely(!pkts_n))
- return 0;
- /* Prefetch first packet cacheline. */
- rte_prefetch0(*pkts);
- /* Start processing. */
- mlx5_tx_complete(txq);
- max_elts = (elts_n - (elts_head - txq->elts_tail));
- max_wqe = (1u << txq->wqe_n) - (txq->wqe_ci - txq->wqe_pi);
- if (unlikely(!max_wqe))
- return 0;
- do {
- volatile rte_v128u32_t *dseg = NULL;
- uint32_t length;
- unsigned int ds = 0;
- unsigned int sg = 0; /* counter of additional segs attached. */
- uintptr_t addr;
- uint64_t naddr;
- uint16_t pkt_inline_sz = MLX5_WQE_DWORD_SIZE + 2;
- uint16_t tso_header_sz = 0;
- uint16_t ehdr;
- uint8_t cs_flags = 0;
- uint64_t tso = 0;
- uint16_t tso_segsz = 0;
-#ifdef MLX5_PMD_SOFT_COUNTERS
- uint32_t total_length = 0;
-#endif
-
- /* first_seg */
- buf = *pkts;
- segs_n = buf->nb_segs;
- /*
- * Make sure there is enough room to store this packet and
- * that one ring entry remains unused.
- */
- assert(segs_n);
- if (max_elts < segs_n)
- break;
- max_elts -= segs_n;
- --segs_n;
- if (unlikely(--max_wqe == 0))
- break;
- wqe = (volatile struct mlx5_wqe_v *)
- tx_mlx5_wqe(txq, txq->wqe_ci);
- rte_prefetch0(tx_mlx5_wqe(txq, txq->wqe_ci + 1));
- if (pkts_n - i > 1)
- rte_prefetch0(*(pkts + 1));
- addr = rte_pktmbuf_mtod(buf, uintptr_t);
- length = DATA_LEN(buf);
- ehdr = (((uint8_t *)addr)[1] << 8) |
- ((uint8_t *)addr)[0];
-#ifdef MLX5_PMD_SOFT_COUNTERS
- total_length = length;
-#endif
- if (length < (MLX5_WQE_DWORD_SIZE + 2)) {
- txq->stats.oerrors++;
- break;
- }
- /* Update element. */
- (*txq->elts)[elts_head & elts_m] = buf;
- /* Prefetch next buffer data. */
- if (pkts_n - i > 1)
- rte_prefetch0(
- rte_pktmbuf_mtod(*(pkts + 1), volatile void *));
- /* Should we enable HW CKSUM offload */
- if (buf->ol_flags &
- (PKT_TX_IP_CKSUM | PKT_TX_TCP_CKSUM | PKT_TX_UDP_CKSUM)) {
- const uint64_t is_tunneled = buf->ol_flags &
- (PKT_TX_TUNNEL_GRE |
- PKT_TX_TUNNEL_VXLAN);
-
- if (is_tunneled && txq->tunnel_en) {
- cs_flags = MLX5_ETH_WQE_L3_INNER_CSUM |
- MLX5_ETH_WQE_L4_INNER_CSUM;
- if (buf->ol_flags & PKT_TX_OUTER_IP_CKSUM)
- cs_flags |= MLX5_ETH_WQE_L3_CSUM;
- } else {
- cs_flags = MLX5_ETH_WQE_L3_CSUM |
- MLX5_ETH_WQE_L4_CSUM;
- }
- }
- raw = ((uint8_t *)(uintptr_t)wqe) + 2 * MLX5_WQE_DWORD_SIZE;
- /* Replace the Ethernet type by the VLAN if necessary. */
- if (buf->ol_flags & PKT_TX_VLAN_PKT) {
- uint32_t vlan = rte_cpu_to_be_32(0x81000000 |
- buf->vlan_tci);
- unsigned int len = 2 * ETHER_ADDR_LEN - 2;
-
- addr += 2;
- length -= 2;
- /* Copy Destination and source mac address. */
- memcpy((uint8_t *)raw, ((uint8_t *)addr), len);
- /* Copy VLAN. */
- memcpy((uint8_t *)raw + len, &vlan, sizeof(vlan));
- /* Copy missing two bytes to end the DSeg. */
- memcpy((uint8_t *)raw + len + sizeof(vlan),
- ((uint8_t *)addr) + len, 2);
- addr += len + 2;
- length -= (len + 2);
- } else {
- memcpy((uint8_t *)raw, ((uint8_t *)addr) + 2,
- MLX5_WQE_DWORD_SIZE);
- length -= pkt_inline_sz;
- addr += pkt_inline_sz;
- }
- raw += MLX5_WQE_DWORD_SIZE;
- if (txq->tso_en) {
- tso = buf->ol_flags & PKT_TX_TCP_SEG;
- if (tso) {
- uintptr_t end = (uintptr_t)
- (((uintptr_t)txq->wqes) +
- (1 << txq->wqe_n) *
- MLX5_WQE_SIZE);
- unsigned int copy_b;
- uint8_t vlan_sz = (buf->ol_flags &
- PKT_TX_VLAN_PKT) ? 4 : 0;
- const uint64_t is_tunneled =
- buf->ol_flags &
- (PKT_TX_TUNNEL_GRE |
- PKT_TX_TUNNEL_VXLAN);
-
- tso_header_sz = buf->l2_len + vlan_sz +
- buf->l3_len + buf->l4_len;
- tso_segsz = buf->tso_segsz;
- if (unlikely(tso_segsz == 0)) {
- txq->stats.oerrors++;
- break;
- }
- if (is_tunneled && txq->tunnel_en) {
- tso_header_sz += buf->outer_l2_len +
- buf->outer_l3_len;
- cs_flags |= MLX5_ETH_WQE_L4_INNER_CSUM;
- } else {
- cs_flags |= MLX5_ETH_WQE_L4_CSUM;
- }
- if (unlikely(tso_header_sz >
- MLX5_MAX_TSO_HEADER)) {
- txq->stats.oerrors++;
- break;
- }
- copy_b = tso_header_sz - pkt_inline_sz;
- /* First seg must contain all headers. */
- assert(copy_b <= length);
- if (copy_b &&
- ((end - (uintptr_t)raw) > copy_b)) {
- uint16_t n = (MLX5_WQE_DS(copy_b) -
- 1 + 3) / 4;
-
- if (unlikely(max_wqe < n))
- break;
- max_wqe -= n;
- rte_memcpy((void *)raw,
- (void *)addr, copy_b);
- addr += copy_b;
- length -= copy_b;
- /* Include padding for TSO header. */
- copy_b = MLX5_WQE_DS(copy_b) *
- MLX5_WQE_DWORD_SIZE;
- pkt_inline_sz += copy_b;
- raw += copy_b;
- } else {
- /* NOP WQE. */
- wqe->ctrl = (rte_v128u32_t){
- rte_cpu_to_be_32(
- txq->wqe_ci << 8),
- rte_cpu_to_be_32(
- txq->qp_num_8s | 1),
- 0,
- 0,
- };
- ds = 1;
- total_length = 0;
- k++;
- goto next_wqe;
- }
- }
- }
- /* Inline if enough room. */
- if (inline_en || tso) {
- uint32_t inl;
- uintptr_t end = (uintptr_t)
- (((uintptr_t)txq->wqes) +
- (1 << txq->wqe_n) * MLX5_WQE_SIZE);
- unsigned int inline_room = max_inline *
- RTE_CACHE_LINE_SIZE -
- (pkt_inline_sz - 2) -
- !!tso * sizeof(inl);
- uintptr_t addr_end = (addr + inline_room) &
- ~(RTE_CACHE_LINE_SIZE - 1);
- unsigned int copy_b = (addr_end > addr) ?
- RTE_MIN((addr_end - addr), length) :
- 0;
-
- if (copy_b && ((end - (uintptr_t)raw) > copy_b)) {
- /*
- * One Dseg remains in the current WQE. To
- * keep the computation positive, it is
- * removed after the bytes to Dseg conversion.
- */
- uint16_t n = (MLX5_WQE_DS(copy_b) - 1 + 3) / 4;
+ struct mlx5_rxq_data *rxq = rx_queue;
+ struct mlx5_rxq_ctrl *rxq_ctrl =
+ container_of(rxq, struct mlx5_rxq_ctrl, rxq);
+ struct rte_eth_dev *dev = ETH_DEV(rxq_ctrl->priv);
- if (unlikely(max_wqe < n))
- break;
- max_wqe -= n;
- if (tso) {
- uint32_t inl =
- rte_cpu_to_be_32(copy_b |
- MLX5_INLINE_SEG);
-
- pkt_inline_sz =
- MLX5_WQE_DS(tso_header_sz) *
- MLX5_WQE_DWORD_SIZE;
-
- rte_memcpy((void *)raw,
- (void *)&inl, sizeof(inl));
- raw += sizeof(inl);
- pkt_inline_sz += sizeof(inl);
- }
- rte_memcpy((void *)raw, (void *)addr, copy_b);
- addr += copy_b;
- length -= copy_b;
- pkt_inline_sz += copy_b;
- }
- /*
- * 2 DWORDs consumed by the WQE header + ETH segment +
- * the size of the inline part of the packet.
- */
- ds = 2 + MLX5_WQE_DS(pkt_inline_sz - 2);
- if (length > 0) {
- if (ds % (MLX5_WQE_SIZE /
- MLX5_WQE_DWORD_SIZE) == 0) {
- if (unlikely(--max_wqe == 0))
- break;
- dseg = (volatile rte_v128u32_t *)
- tx_mlx5_wqe(txq, txq->wqe_ci +
- ds / 4);
- } else {
- dseg = (volatile rte_v128u32_t *)
- ((uintptr_t)wqe +
- (ds * MLX5_WQE_DWORD_SIZE));
- }
- goto use_dseg;
- } else if (!segs_n) {
- goto next_pkt;
- } else {
- /* dseg will be advance as part of next_seg */
- dseg = (volatile rte_v128u32_t *)
- ((uintptr_t)wqe +
- ((ds - 1) * MLX5_WQE_DWORD_SIZE));
- goto next_seg;
- }
- } else {
- /*
- * No inline has been done in the packet, only the
- * Ethernet Header as been stored.
- */
- dseg = (volatile rte_v128u32_t *)
- ((uintptr_t)wqe + (3 * MLX5_WQE_DWORD_SIZE));
- ds = 3;
-use_dseg:
- /* Add the remaining packet as a simple ds. */
- naddr = rte_cpu_to_be_64(addr);
- *dseg = (rte_v128u32_t){
- rte_cpu_to_be_32(length),
- mlx5_tx_mb2mr(txq, buf),
- naddr,
- naddr >> 32,
- };
- ++ds;
- if (!segs_n)
- goto next_pkt;
- }
-next_seg:
- assert(buf);
- assert(ds);
- assert(wqe);
- /*
- * Spill on next WQE when the current one does not have
- * enough room left. Size of WQE must a be a multiple
- * of data segment size.
- */
- assert(!(MLX5_WQE_SIZE % MLX5_WQE_DWORD_SIZE));
- if (!(ds % (MLX5_WQE_SIZE / MLX5_WQE_DWORD_SIZE))) {
- if (unlikely(--max_wqe == 0))
- break;
- dseg = (volatile rte_v128u32_t *)
- tx_mlx5_wqe(txq, txq->wqe_ci + ds / 4);
- rte_prefetch0(tx_mlx5_wqe(txq,
- txq->wqe_ci + ds / 4 + 1));
- } else {
- ++dseg;
- }
- ++ds;
- buf = buf->next;
- assert(buf);
- length = DATA_LEN(buf);
-#ifdef MLX5_PMD_SOFT_COUNTERS
- total_length += length;
-#endif
- /* Store segment information. */
- naddr = rte_cpu_to_be_64(rte_pktmbuf_mtod(buf, uintptr_t));
- *dseg = (rte_v128u32_t){
- rte_cpu_to_be_32(length),
- mlx5_tx_mb2mr(txq, buf),
- naddr,
- naddr >> 32,
- };
- (*txq->elts)[++elts_head & elts_m] = buf;
- ++sg;
- /* Advance counter only if all segs are successfully posted. */
- if (sg < segs_n)
- goto next_seg;
- else
- j += sg;
-next_pkt:
- if (ds > MLX5_DSEG_MAX) {
- txq->stats.oerrors++;
- break;
- }
- ++elts_head;
- ++pkts;
- ++i;
- /* Initialize known and common part of the WQE structure. */
- if (tso) {
- wqe->ctrl = (rte_v128u32_t){
- rte_cpu_to_be_32((txq->wqe_ci << 8) |
- MLX5_OPCODE_TSO),
- rte_cpu_to_be_32(txq->qp_num_8s | ds),
- 0,
- 0,
- };
- wqe->eseg = (rte_v128u32_t){
- 0,
- cs_flags | (rte_cpu_to_be_16(tso_segsz) << 16),
- 0,
- (ehdr << 16) | rte_cpu_to_be_16(tso_header_sz),
- };
- } else {
- wqe->ctrl = (rte_v128u32_t){
- rte_cpu_to_be_32((txq->wqe_ci << 8) |
- MLX5_OPCODE_SEND),
- rte_cpu_to_be_32(txq->qp_num_8s | ds),
- 0,
- 0,
- };
- wqe->eseg = (rte_v128u32_t){
- 0,
- cs_flags,
- 0,
- (ehdr << 16) | rte_cpu_to_be_16(pkt_inline_sz),
- };
- }
-next_wqe:
- txq->wqe_ci += (ds + 3) / 4;
- /* Save the last successful WQE for completion request */
- last_wqe = (volatile struct mlx5_wqe_ctrl *)wqe;
-#ifdef MLX5_PMD_SOFT_COUNTERS
- /* Increment sent bytes counter. */
- txq->stats.obytes += total_length;
-#endif
- } while (i < pkts_n);
- /* Take a shortcut if nothing must be sent. */
- if (unlikely((i + k) == 0))
- return 0;
- txq->elts_head += (i + j);
- /* Check whether completion threshold has been reached. */
- comp = txq->elts_comp + i + j + k;
- if (comp >= MLX5_TX_COMP_THRESH) {
- /* Request completion on last WQE. */
- last_wqe->ctrl2 = rte_cpu_to_be_32(8);
- /* Save elts_head in unused "immediate" field of WQE. */
- last_wqe->ctrl3 = txq->elts_head;
- txq->elts_comp = 0;
- } else {
- txq->elts_comp = comp;
+ if (dev->rx_pkt_burst != mlx5_rx_burst) {
+ rte_errno = ENOTSUP;
+ return -rte_errno;
}
-#ifdef MLX5_PMD_SOFT_COUNTERS
- /* Increment sent packets counter. */
- txq->stats.opackets += i;
-#endif
- /* Ring QP doorbell. */
- mlx5_tx_dbrec(txq, (volatile struct mlx5_wqe *)last_wqe);
- return i;
+ if (offset >= (1 << rxq->elts_n)) {
+ rte_errno = EINVAL;
+ return -rte_errno;
+ }
+ if (offset < rx_queue_count(rxq))
+ return RTE_ETH_RX_DESC_DONE;
+ return RTE_ETH_RX_DESC_AVAIL;
}
/**
- * Open a MPW session.
+ * DPDK callback to get the number of used descriptors in a RX queue
*
- * @param txq
- * Pointer to TX queue structure.
- * @param mpw
- * Pointer to MPW session structure.
- * @param length
- * Packet length.
+ * @param dev
+ * Pointer to the device structure.
+ *
+ * @param rx_queue_id
+ * The Rx queue.
+ *
+ * @return
+ * The number of used rx descriptor.
+ * -EINVAL if the queue is invalid
*/
-static inline void
-mlx5_mpw_new(struct mlx5_txq_data *txq, struct mlx5_mpw *mpw, uint32_t length)
-{
- uint16_t idx = txq->wqe_ci & ((1 << txq->wqe_n) - 1);
- volatile struct mlx5_wqe_data_seg (*dseg)[MLX5_MPW_DSEG_MAX] =
- (volatile struct mlx5_wqe_data_seg (*)[])
- tx_mlx5_wqe(txq, idx + 1);
-
- mpw->state = MLX5_MPW_STATE_OPENED;
- mpw->pkts_n = 0;
- mpw->len = length;
- mpw->total_len = 0;
- mpw->wqe = (volatile struct mlx5_wqe *)tx_mlx5_wqe(txq, idx);
- mpw->wqe->eseg.mss = rte_cpu_to_be_16(length);
- mpw->wqe->eseg.inline_hdr_sz = 0;
- mpw->wqe->eseg.rsvd0 = 0;
- mpw->wqe->eseg.rsvd1 = 0;
- mpw->wqe->eseg.rsvd2 = 0;
- mpw->wqe->ctrl[0] = rte_cpu_to_be_32((MLX5_OPC_MOD_MPW << 24) |
- (txq->wqe_ci << 8) |
- MLX5_OPCODE_TSO);
- mpw->wqe->ctrl[2] = 0;
- mpw->wqe->ctrl[3] = 0;
- mpw->data.dseg[0] = (volatile struct mlx5_wqe_data_seg *)
- (((uintptr_t)mpw->wqe) + (2 * MLX5_WQE_DWORD_SIZE));
- mpw->data.dseg[1] = (volatile struct mlx5_wqe_data_seg *)
- (((uintptr_t)mpw->wqe) + (3 * MLX5_WQE_DWORD_SIZE));
- mpw->data.dseg[2] = &(*dseg)[0];
- mpw->data.dseg[3] = &(*dseg)[1];
- mpw->data.dseg[4] = &(*dseg)[2];
+uint32_t
+mlx5_rx_queue_count(struct rte_eth_dev *dev, uint16_t rx_queue_id)
+{
+ struct mlx5_priv *priv = dev->data->dev_private;
+ struct mlx5_rxq_data *rxq;
+
+ if (dev->rx_pkt_burst != mlx5_rx_burst) {
+ rte_errno = ENOTSUP;
+ return -rte_errno;
+ }
+ rxq = (*priv->rxqs)[rx_queue_id];
+ if (!rxq) {
+ rte_errno = EINVAL;
+ return -rte_errno;
+ }
+ return rx_queue_count(rxq);
}
+#define MLX5_SYSTEM_LOG_DIR "/var/log"
/**
- * Close a MPW session.
+ * Dump debug information to log file.
*
- * @param txq
- * Pointer to TX queue structure.
- * @param mpw
- * Pointer to MPW session structure.
+ * @param fname
+ * The file name.
+ * @param hex_title
+ * If not NULL this string is printed as a header to the output
+ * and the output will be in hexadecimal view.
+ * @param buf
+ * This is the buffer address to print out.
+ * @param len
+ * The number of bytes to dump out.
*/
-static inline void
-mlx5_mpw_close(struct mlx5_txq_data *txq, struct mlx5_mpw *mpw)
+void
+mlx5_dump_debug_information(const char *fname, const char *hex_title,
+ const void *buf, unsigned int hex_len)
{
- unsigned int num = mpw->pkts_n;
+ FILE *fd;
- /*
- * Store size in multiple of 16 bytes. Control and Ethernet segments
- * count as 2.
- */
- mpw->wqe->ctrl[1] = rte_cpu_to_be_32(txq->qp_num_8s | (2 + num));
- mpw->state = MLX5_MPW_STATE_CLOSED;
- if (num < 3)
- ++txq->wqe_ci;
+ MKSTR(path, "%s/%s", MLX5_SYSTEM_LOG_DIR, fname);
+ fd = fopen(path, "a+");
+ if (!fd) {
+ DRV_LOG(WARNING, "cannot open %s for debug dump", path);
+ MKSTR(path2, "./%s", fname);
+ fd = fopen(path2, "a+");
+ if (!fd) {
+ DRV_LOG(ERR, "cannot open %s for debug dump", path2);
+ return;
+ }
+ DRV_LOG(INFO, "New debug dump in file %s", path2);
+ } else {
+ DRV_LOG(INFO, "New debug dump in file %s", path);
+ }
+ if (hex_title)
+ rte_hexdump(fd, hex_title, buf, hex_len);
else
- txq->wqe_ci += 2;
- rte_prefetch0(tx_mlx5_wqe(txq, txq->wqe_ci));
- rte_prefetch0(tx_mlx5_wqe(txq, txq->wqe_ci + 1));
+ fprintf(fd, "%s", (const char *)buf);
+ fprintf(fd, "\n\n\n");
+ fclose(fd);
}
/**
- * DPDK callback for TX with MPW support.
+ * Move QP from error state to running state and initialize indexes.
*
- * @param dpdk_txq
- * Generic pointer to TX queue structure.
- * @param[in] pkts
- * Packets to transmit.
- * @param pkts_n
- * Number of packets in array.
+ * @param txq_ctrl
+ * Pointer to TX queue control structure.
*
* @return
- * Number of packets successfully transmitted (<= pkts_n).
+ * 0 on success, else -1.
*/
-uint16_t
-mlx5_tx_burst_mpw(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n)
+static int
+tx_recover_qp(struct mlx5_txq_ctrl *txq_ctrl)
{
- struct mlx5_txq_data *txq = (struct mlx5_txq_data *)dpdk_txq;
- uint16_t elts_head = txq->elts_head;
- const uint16_t elts_n = 1 << txq->elts_n;
- const uint16_t elts_m = elts_n - 1;
- unsigned int i = 0;
- unsigned int j = 0;
- uint16_t max_elts;
- uint16_t max_wqe;
- unsigned int comp;
- struct mlx5_mpw mpw = {
- .state = MLX5_MPW_STATE_CLOSED,
+ struct mlx5_mp_arg_queue_state_modify sm = {
+ .is_wq = 0,
+ .queue_id = txq_ctrl->txq.idx,
};
- if (unlikely(!pkts_n))
- return 0;
- /* Prefetch first packet cacheline. */
- rte_prefetch0(tx_mlx5_wqe(txq, txq->wqe_ci));
- rte_prefetch0(tx_mlx5_wqe(txq, txq->wqe_ci + 1));
- /* Start processing. */
- mlx5_tx_complete(txq);
- max_elts = (elts_n - (elts_head - txq->elts_tail));
- max_wqe = (1u << txq->wqe_n) - (txq->wqe_ci - txq->wqe_pi);
- if (unlikely(!max_wqe))
- return 0;
- do {
- struct rte_mbuf *buf = *(pkts++);
- uint32_t length;
- unsigned int segs_n = buf->nb_segs;
- uint32_t cs_flags = 0;
+ if (mlx5_queue_state_modify(ETH_DEV(txq_ctrl->priv), &sm))
+ return -1;
+ txq_ctrl->txq.wqe_ci = 0;
+ txq_ctrl->txq.wqe_pi = 0;
+ txq_ctrl->txq.elts_comp = 0;
+ return 0;
+}
- /*
- * Make sure there is enough room to store this packet and
- * that one ring entry remains unused.
- */
- assert(segs_n);
- if (max_elts < segs_n)
- break;
- /* Do not bother with large packets MPW cannot handle. */
- if (segs_n > MLX5_MPW_DSEG_MAX) {
- txq->stats.oerrors++;
- break;
- }
- max_elts -= segs_n;
- --pkts_n;
- /* Should we enable HW CKSUM offload */
- if (buf->ol_flags &
- (PKT_TX_IP_CKSUM | PKT_TX_TCP_CKSUM | PKT_TX_UDP_CKSUM))
- cs_flags = MLX5_ETH_WQE_L3_CSUM | MLX5_ETH_WQE_L4_CSUM;
- /* Retrieve packet information. */
- length = PKT_LEN(buf);
- assert(length);
- /* Start new session if packet differs. */
- if ((mpw.state == MLX5_MPW_STATE_OPENED) &&
- ((mpw.len != length) ||
- (segs_n != 1) ||
- (mpw.wqe->eseg.cs_flags != cs_flags)))
- mlx5_mpw_close(txq, &mpw);
- if (mpw.state == MLX5_MPW_STATE_CLOSED) {
- /*
- * Multi-Packet WQE consumes at most two WQE.
- * mlx5_mpw_new() expects to be able to use such
- * resources.
- */
- if (unlikely(max_wqe < 2))
- break;
- max_wqe -= 2;
- mlx5_mpw_new(txq, &mpw, length);
- mpw.wqe->eseg.cs_flags = cs_flags;
- }
- /* Multi-segment packets must be alone in their MPW. */
- assert((segs_n == 1) || (mpw.pkts_n == 0));
-#if defined(MLX5_PMD_SOFT_COUNTERS) || !defined(NDEBUG)
- length = 0;
-#endif
- do {
- volatile struct mlx5_wqe_data_seg *dseg;
- uintptr_t addr;
+/* Return 1 if the error CQE is signed otherwise, sign it and return 0. */
+static int
+check_err_cqe_seen(volatile struct mlx5_err_cqe *err_cqe)
+{
+ static const uint8_t magic[] = "seen";
+ int ret = 1;
+ unsigned int i;
- assert(buf);
- (*txq->elts)[elts_head++ & elts_m] = buf;
- dseg = mpw.data.dseg[mpw.pkts_n];
- addr = rte_pktmbuf_mtod(buf, uintptr_t);
- *dseg = (struct mlx5_wqe_data_seg){
- .byte_count = rte_cpu_to_be_32(DATA_LEN(buf)),
- .lkey = mlx5_tx_mb2mr(txq, buf),
- .addr = rte_cpu_to_be_64(addr),
- };
-#if defined(MLX5_PMD_SOFT_COUNTERS) || !defined(NDEBUG)
- length += DATA_LEN(buf);
-#endif
- buf = buf->next;
- ++mpw.pkts_n;
- ++j;
- } while (--segs_n);
- assert(length == mpw.len);
- if (mpw.pkts_n == MLX5_MPW_DSEG_MAX)
- mlx5_mpw_close(txq, &mpw);
-#ifdef MLX5_PMD_SOFT_COUNTERS
- /* Increment sent bytes counter. */
- txq->stats.obytes += length;
-#endif
- ++i;
- } while (pkts_n);
- /* Take a shortcut if nothing must be sent. */
- if (unlikely(i == 0))
- return 0;
- /* Check whether completion threshold has been reached. */
- /* "j" includes both packets and segments. */
- comp = txq->elts_comp + j;
- if (comp >= MLX5_TX_COMP_THRESH) {
- volatile struct mlx5_wqe *wqe = mpw.wqe;
-
- /* Request completion on last WQE. */
- wqe->ctrl[2] = rte_cpu_to_be_32(8);
- /* Save elts_head in unused "immediate" field of WQE. */
- wqe->ctrl[3] = elts_head;
- txq->elts_comp = 0;
- } else {
- txq->elts_comp = comp;
- }
-#ifdef MLX5_PMD_SOFT_COUNTERS
- /* Increment sent packets counter. */
- txq->stats.opackets += i;
-#endif
- /* Ring QP doorbell. */
- if (mpw.state == MLX5_MPW_STATE_OPENED)
- mlx5_mpw_close(txq, &mpw);
- mlx5_tx_dbrec(txq, mpw.wqe);
- txq->elts_head = elts_head;
- return i;
+ for (i = 0; i < sizeof(magic); ++i)
+ if (!ret || err_cqe->rsvd1[i] != magic[i]) {
+ ret = 0;
+ err_cqe->rsvd1[i] = magic[i];
+ }
+ return ret;
}
/**
- * Open a MPW inline session.
+ * Handle error CQE.
*
* @param txq
* Pointer to TX queue structure.
- * @param mpw
- * Pointer to MPW session structure.
- * @param length
- * Packet length.
+ * @param error_cqe
+ * Pointer to the error CQE.
+ *
+ * @return
+ * Negative value if queue recovery failed,
+ * the last Tx buffer element to free otherwise.
*/
-static inline void
-mlx5_mpw_inline_new(struct mlx5_txq_data *txq, struct mlx5_mpw *mpw,
- uint32_t length)
-{
- uint16_t idx = txq->wqe_ci & ((1 << txq->wqe_n) - 1);
- struct mlx5_wqe_inl_small *inl;
-
- mpw->state = MLX5_MPW_INL_STATE_OPENED;
- mpw->pkts_n = 0;
- mpw->len = length;
- mpw->total_len = 0;
- mpw->wqe = (volatile struct mlx5_wqe *)tx_mlx5_wqe(txq, idx);
- mpw->wqe->ctrl[0] = rte_cpu_to_be_32((MLX5_OPC_MOD_MPW << 24) |
- (txq->wqe_ci << 8) |
- MLX5_OPCODE_TSO);
- mpw->wqe->ctrl[2] = 0;
- mpw->wqe->ctrl[3] = 0;
- mpw->wqe->eseg.mss = rte_cpu_to_be_16(length);
- mpw->wqe->eseg.inline_hdr_sz = 0;
- mpw->wqe->eseg.cs_flags = 0;
- mpw->wqe->eseg.rsvd0 = 0;
- mpw->wqe->eseg.rsvd1 = 0;
- mpw->wqe->eseg.rsvd2 = 0;
- inl = (struct mlx5_wqe_inl_small *)
- (((uintptr_t)mpw->wqe) + 2 * MLX5_WQE_DWORD_SIZE);
- mpw->data.raw = (uint8_t *)&inl->raw;
+int
+mlx5_tx_error_cqe_handle(struct mlx5_txq_data *restrict txq,
+ volatile struct mlx5_err_cqe *err_cqe)
+{
+ if (err_cqe->syndrome != MLX5_CQE_SYNDROME_WR_FLUSH_ERR) {
+ const uint16_t wqe_m = ((1 << txq->wqe_n) - 1);
+ struct mlx5_txq_ctrl *txq_ctrl =
+ container_of(txq, struct mlx5_txq_ctrl, txq);
+ uint16_t new_wqe_pi = rte_be_to_cpu_16(err_cqe->wqe_counter);
+ int seen = check_err_cqe_seen(err_cqe);
+
+ if (!seen && txq_ctrl->dump_file_n <
+ txq_ctrl->priv->config.max_dump_files_num) {
+ MKSTR(err_str, "Unexpected CQE error syndrome "
+ "0x%02x CQN = %u SQN = %u wqe_counter = %u "
+ "wq_ci = %u cq_ci = %u", err_cqe->syndrome,
+ txq->cqe_s, txq->qp_num_8s >> 8,
+ rte_be_to_cpu_16(err_cqe->wqe_counter),
+ txq->wqe_ci, txq->cq_ci);
+ MKSTR(name, "dpdk_mlx5_port_%u_txq_%u_index_%u_%u",
+ PORT_ID(txq_ctrl->priv), txq->idx,
+ txq_ctrl->dump_file_n, (uint32_t)rte_rdtsc());
+ mlx5_dump_debug_information(name, NULL, err_str, 0);
+ mlx5_dump_debug_information(name, "MLX5 Error CQ:",
+ (const void *)((uintptr_t)
+ txq->cqes),
+ sizeof(*err_cqe) *
+ (1 << txq->cqe_n));
+ mlx5_dump_debug_information(name, "MLX5 Error SQ:",
+ (const void *)((uintptr_t)
+ txq->wqes),
+ MLX5_WQE_SIZE *
+ (1 << txq->wqe_n));
+ txq_ctrl->dump_file_n++;
+ }
+ if (!seen)
+ /*
+ * Count errors in WQEs units.
+ * Later it can be improved to count error packets,
+ * for example, by SQ parsing to find how much packets
+ * should be counted for each WQE.
+ */
+ txq->stats.oerrors += ((txq->wqe_ci & wqe_m) -
+ new_wqe_pi) & wqe_m;
+ if (tx_recover_qp(txq_ctrl) == 0) {
+ txq->cq_ci++;
+ /* Release all the remaining buffers. */
+ return txq->elts_head;
+ }
+ /* Recovering failed - try again later on the same WQE. */
+ return -1;
+ } else {
+ txq->cq_ci++;
+ }
+ /* Do not release buffers. */
+ return txq->elts_tail;
}
/**
- * Close a MPW inline session.
+ * Translate RX completion flags to packet type.
*
- * @param txq
- * Pointer to TX queue structure.
- * @param mpw
- * Pointer to MPW session structure.
+ * @param[in] rxq
+ * Pointer to RX queue structure.
+ * @param[in] cqe
+ * Pointer to CQE.
+ *
+ * @note: fix mlx5_dev_supported_ptypes_get() if any change here.
+ *
+ * @return
+ * Packet type for struct rte_mbuf.
*/
-static inline void
-mlx5_mpw_inline_close(struct mlx5_txq_data *txq, struct mlx5_mpw *mpw)
+static inline uint32_t
+rxq_cq_to_pkt_type(struct mlx5_rxq_data *rxq, volatile struct mlx5_cqe *cqe)
{
- unsigned int size;
- struct mlx5_wqe_inl_small *inl = (struct mlx5_wqe_inl_small *)
- (((uintptr_t)mpw->wqe) + (2 * MLX5_WQE_DWORD_SIZE));
+ uint8_t idx;
+ uint8_t pinfo = cqe->pkt_info;
+ uint16_t ptype = cqe->hdr_type_etc;
- size = MLX5_WQE_SIZE - MLX5_MWQE64_INL_DATA + mpw->total_len;
/*
- * Store size in multiple of 16 bytes. Control and Ethernet segments
- * count as 2.
+ * The index to the array should have:
+ * bit[1:0] = l3_hdr_type
+ * bit[4:2] = l4_hdr_type
+ * bit[5] = ip_frag
+ * bit[6] = tunneled
+ * bit[7] = outer_l3_type
*/
- mpw->wqe->ctrl[1] = rte_cpu_to_be_32(txq->qp_num_8s |
- MLX5_WQE_DS(size));
- mpw->state = MLX5_MPW_STATE_CLOSED;
- inl->byte_cnt = rte_cpu_to_be_32(mpw->total_len | MLX5_INLINE_SEG);
- txq->wqe_ci += (size + (MLX5_WQE_SIZE - 1)) / MLX5_WQE_SIZE;
+ idx = ((pinfo & 0x3) << 6) | ((ptype & 0xfc00) >> 10);
+ return mlx5_ptype_table[idx] | rxq->tunnel * !!(idx & (1 << 6));
}
/**
- * DPDK callback for TX with MPW inline support.
- *
- * @param dpdk_txq
- * Generic pointer to TX queue structure.
- * @param[in] pkts
- * Packets to transmit.
- * @param pkts_n
- * Number of packets in array.
+ * Initialize Rx WQ and indexes.
*
- * @return
- * Number of packets successfully transmitted (<= pkts_n).
+ * @param[in] rxq
+ * Pointer to RX queue structure.
*/
-uint16_t
-mlx5_tx_burst_mpw_inline(void *dpdk_txq, struct rte_mbuf **pkts,
- uint16_t pkts_n)
+void
+mlx5_rxq_initialize(struct mlx5_rxq_data *rxq)
{
- struct mlx5_txq_data *txq = (struct mlx5_txq_data *)dpdk_txq;
- uint16_t elts_head = txq->elts_head;
- const uint16_t elts_n = 1 << txq->elts_n;
- const uint16_t elts_m = elts_n - 1;
- unsigned int i = 0;
- unsigned int j = 0;
- uint16_t max_elts;
- uint16_t max_wqe;
- unsigned int comp;
- unsigned int inline_room = txq->max_inline * RTE_CACHE_LINE_SIZE;
- struct mlx5_mpw mpw = {
- .state = MLX5_MPW_STATE_CLOSED,
- };
- /*
- * Compute the maximum number of WQE which can be consumed by inline
- * code.
- * - 2 DSEG for:
- * - 1 control segment,
- * - 1 Ethernet segment,
- * - N Dseg from the inline request.
- */
- const unsigned int wqe_inl_n =
- ((2 * MLX5_WQE_DWORD_SIZE +
- txq->max_inline * RTE_CACHE_LINE_SIZE) +
- RTE_CACHE_LINE_SIZE - 1) / RTE_CACHE_LINE_SIZE;
+ const unsigned int wqe_n = 1 << rxq->elts_n;
+ unsigned int i;
- if (unlikely(!pkts_n))
- return 0;
- /* Prefetch first packet cacheline. */
- rte_prefetch0(tx_mlx5_wqe(txq, txq->wqe_ci));
- rte_prefetch0(tx_mlx5_wqe(txq, txq->wqe_ci + 1));
- /* Start processing. */
- mlx5_tx_complete(txq);
- max_elts = (elts_n - (elts_head - txq->elts_tail));
- do {
- struct rte_mbuf *buf = *(pkts++);
+ for (i = 0; (i != wqe_n); ++i) {
+ volatile struct mlx5_wqe_data_seg *scat;
uintptr_t addr;
- uint32_t length;
- unsigned int segs_n = buf->nb_segs;
- uint32_t cs_flags = 0;
+ uint32_t byte_count;
- /*
- * Make sure there is enough room to store this packet and
- * that one ring entry remains unused.
- */
- assert(segs_n);
- if (max_elts < segs_n)
- break;
- /* Do not bother with large packets MPW cannot handle. */
- if (segs_n > MLX5_MPW_DSEG_MAX) {
- txq->stats.oerrors++;
- break;
- }
- max_elts -= segs_n;
- --pkts_n;
- /*
- * Compute max_wqe in case less WQE were consumed in previous
- * iteration.
- */
- max_wqe = (1u << txq->wqe_n) - (txq->wqe_ci - txq->wqe_pi);
- /* Should we enable HW CKSUM offload */
- if (buf->ol_flags &
- (PKT_TX_IP_CKSUM | PKT_TX_TCP_CKSUM | PKT_TX_UDP_CKSUM))
- cs_flags = MLX5_ETH_WQE_L3_CSUM | MLX5_ETH_WQE_L4_CSUM;
- /* Retrieve packet information. */
- length = PKT_LEN(buf);
- /* Start new session if packet differs. */
- if (mpw.state == MLX5_MPW_STATE_OPENED) {
- if ((mpw.len != length) ||
- (segs_n != 1) ||
- (mpw.wqe->eseg.cs_flags != cs_flags))
- mlx5_mpw_close(txq, &mpw);
- } else if (mpw.state == MLX5_MPW_INL_STATE_OPENED) {
- if ((mpw.len != length) ||
- (segs_n != 1) ||
- (length > inline_room) ||
- (mpw.wqe->eseg.cs_flags != cs_flags)) {
- mlx5_mpw_inline_close(txq, &mpw);
- inline_room =
- txq->max_inline * RTE_CACHE_LINE_SIZE;
- }
- }
- if (mpw.state == MLX5_MPW_STATE_CLOSED) {
- if ((segs_n != 1) ||
- (length > inline_room)) {
- /*
- * Multi-Packet WQE consumes at most two WQE.
- * mlx5_mpw_new() expects to be able to use
- * such resources.
- */
- if (unlikely(max_wqe < 2))
- break;
- max_wqe -= 2;
- mlx5_mpw_new(txq, &mpw, length);
- mpw.wqe->eseg.cs_flags = cs_flags;
- } else {
- if (unlikely(max_wqe < wqe_inl_n))
- break;
- max_wqe -= wqe_inl_n;
- mlx5_mpw_inline_new(txq, &mpw, length);
- mpw.wqe->eseg.cs_flags = cs_flags;
- }
- }
- /* Multi-segment packets must be alone in their MPW. */
- assert((segs_n == 1) || (mpw.pkts_n == 0));
- if (mpw.state == MLX5_MPW_STATE_OPENED) {
- assert(inline_room ==
- txq->max_inline * RTE_CACHE_LINE_SIZE);
-#if defined(MLX5_PMD_SOFT_COUNTERS) || !defined(NDEBUG)
- length = 0;
-#endif
- do {
- volatile struct mlx5_wqe_data_seg *dseg;
-
- assert(buf);
- (*txq->elts)[elts_head++ & elts_m] = buf;
- dseg = mpw.data.dseg[mpw.pkts_n];
- addr = rte_pktmbuf_mtod(buf, uintptr_t);
- *dseg = (struct mlx5_wqe_data_seg){
- .byte_count =
- rte_cpu_to_be_32(DATA_LEN(buf)),
- .lkey = mlx5_tx_mb2mr(txq, buf),
- .addr = rte_cpu_to_be_64(addr),
- };
-#if defined(MLX5_PMD_SOFT_COUNTERS) || !defined(NDEBUG)
- length += DATA_LEN(buf);
-#endif
- buf = buf->next;
- ++mpw.pkts_n;
- ++j;
- } while (--segs_n);
- assert(length == mpw.len);
- if (mpw.pkts_n == MLX5_MPW_DSEG_MAX)
- mlx5_mpw_close(txq, &mpw);
+ if (mlx5_rxq_mprq_enabled(rxq)) {
+ struct mlx5_mprq_buf *buf = (*rxq->mprq_bufs)[i];
+
+ scat = &((volatile struct mlx5_wqe_mprq *)
+ rxq->wqes)[i].dseg;
+ addr = (uintptr_t)mlx5_mprq_buf_addr(buf,
+ 1 << rxq->strd_num_n);
+ byte_count = (1 << rxq->strd_sz_n) *
+ (1 << rxq->strd_num_n);
} else {
- unsigned int max;
+ struct rte_mbuf *buf = (*rxq->elts)[i];
- assert(mpw.state == MLX5_MPW_INL_STATE_OPENED);
- assert(length <= inline_room);
- assert(length == DATA_LEN(buf));
+ scat = &((volatile struct mlx5_wqe_data_seg *)
+ rxq->wqes)[i];
addr = rte_pktmbuf_mtod(buf, uintptr_t);
- (*txq->elts)[elts_head++ & elts_m] = buf;
- /* Maximum number of bytes before wrapping. */
- max = ((((uintptr_t)(txq->wqes)) +
- (1 << txq->wqe_n) *
- MLX5_WQE_SIZE) -
- (uintptr_t)mpw.data.raw);
- if (length > max) {
- rte_memcpy((void *)(uintptr_t)mpw.data.raw,
- (void *)addr,
- max);
- mpw.data.raw = (volatile void *)txq->wqes;
- rte_memcpy((void *)(uintptr_t)mpw.data.raw,
- (void *)(addr + max),
- length - max);
- mpw.data.raw += length - max;
- } else {
- rte_memcpy((void *)(uintptr_t)mpw.data.raw,
- (void *)addr,
- length);
-
- if (length == max)
- mpw.data.raw =
- (volatile void *)txq->wqes;
- else
- mpw.data.raw += length;
- }
- ++mpw.pkts_n;
- mpw.total_len += length;
- ++j;
- if (mpw.pkts_n == MLX5_MPW_DSEG_MAX) {
- mlx5_mpw_inline_close(txq, &mpw);
- inline_room =
- txq->max_inline * RTE_CACHE_LINE_SIZE;
- } else {
- inline_room -= length;
- }
+ byte_count = DATA_LEN(buf);
}
-#ifdef MLX5_PMD_SOFT_COUNTERS
- /* Increment sent bytes counter. */
- txq->stats.obytes += length;
-#endif
- ++i;
- } while (pkts_n);
- /* Take a shortcut if nothing must be sent. */
- if (unlikely(i == 0))
- return 0;
- /* Check whether completion threshold has been reached. */
- /* "j" includes both packets and segments. */
- comp = txq->elts_comp + j;
- if (comp >= MLX5_TX_COMP_THRESH) {
- volatile struct mlx5_wqe *wqe = mpw.wqe;
-
- /* Request completion on last WQE. */
- wqe->ctrl[2] = rte_cpu_to_be_32(8);
- /* Save elts_head in unused "immediate" field of WQE. */
- wqe->ctrl[3] = elts_head;
- txq->elts_comp = 0;
- } else {
- txq->elts_comp = comp;
+ /* scat->addr must be able to store a pointer. */
+ assert(sizeof(scat->addr) >= sizeof(uintptr_t));
+ *scat = (struct mlx5_wqe_data_seg){
+ .addr = rte_cpu_to_be_64(addr),
+ .byte_count = rte_cpu_to_be_32(byte_count),
+ .lkey = mlx5_rx_addr2mr(rxq, addr),
+ };
}
-#ifdef MLX5_PMD_SOFT_COUNTERS
- /* Increment sent packets counter. */
- txq->stats.opackets += i;
-#endif
- /* Ring QP doorbell. */
- if (mpw.state == MLX5_MPW_INL_STATE_OPENED)
- mlx5_mpw_inline_close(txq, &mpw);
- else if (mpw.state == MLX5_MPW_STATE_OPENED)
- mlx5_mpw_close(txq, &mpw);
- mlx5_tx_dbrec(txq, mpw.wqe);
- txq->elts_head = elts_head;
- return i;
+ rxq->consumed_strd = 0;
+ rxq->decompressed = 0;
+ rxq->rq_pi = 0;
+ rxq->zip = (struct rxq_zip){
+ .ai = 0,
+ };
+ /* Update doorbell counter. */
+ rxq->rq_ci = wqe_n >> rxq->sges_n;
+ rte_cio_wmb();
+ *rxq->rq_db = rte_cpu_to_be_32(rxq->rq_ci);
}
/**
- * Open an Enhanced MPW session.
+ * Modify a Verbs/DevX queue state.
+ * This must be called from the primary process.
*
- * @param txq
- * Pointer to TX queue structure.
- * @param mpw
- * Pointer to MPW session structure.
- * @param length
- * Packet length.
+ * @param dev
+ * Pointer to Ethernet device.
+ * @param sm
+ * State modify request parameters.
+ *
+ * @return
+ * 0 in case of success else non-zero value and rte_errno is set.
*/
-static inline void
-mlx5_empw_new(struct mlx5_txq_data *txq, struct mlx5_mpw *mpw, int padding)
-{
- uint16_t idx = txq->wqe_ci & ((1 << txq->wqe_n) - 1);
-
- mpw->state = MLX5_MPW_ENHANCED_STATE_OPENED;
- mpw->pkts_n = 0;
- mpw->total_len = sizeof(struct mlx5_wqe);
- mpw->wqe = (volatile struct mlx5_wqe *)tx_mlx5_wqe(txq, idx);
- mpw->wqe->ctrl[0] =
- rte_cpu_to_be_32((MLX5_OPC_MOD_ENHANCED_MPSW << 24) |
- (txq->wqe_ci << 8) |
- MLX5_OPCODE_ENHANCED_MPSW);
- mpw->wqe->ctrl[2] = 0;
- mpw->wqe->ctrl[3] = 0;
- memset((void *)(uintptr_t)&mpw->wqe->eseg, 0, MLX5_WQE_DWORD_SIZE);
- if (unlikely(padding)) {
- uintptr_t addr = (uintptr_t)(mpw->wqe + 1);
-
- /* Pad the first 2 DWORDs with zero-length inline header. */
- *(volatile uint32_t *)addr = rte_cpu_to_be_32(MLX5_INLINE_SEG);
- *(volatile uint32_t *)(addr + MLX5_WQE_DWORD_SIZE) =
- rte_cpu_to_be_32(MLX5_INLINE_SEG);
- mpw->total_len += 2 * MLX5_WQE_DWORD_SIZE;
- /* Start from the next WQEBB. */
- mpw->data.raw = (volatile void *)(tx_mlx5_wqe(txq, idx + 1));
+int
+mlx5_queue_state_modify_primary(struct rte_eth_dev *dev,
+ const struct mlx5_mp_arg_queue_state_modify *sm)
+{
+ int ret;
+ struct mlx5_priv *priv = dev->data->dev_private;
+
+ if (sm->is_wq) {
+ struct mlx5_rxq_data *rxq = (*priv->rxqs)[sm->queue_id];
+ struct mlx5_rxq_ctrl *rxq_ctrl =
+ container_of(rxq, struct mlx5_rxq_ctrl, rxq);
+
+ if (rxq_ctrl->obj->type == MLX5_RXQ_OBJ_TYPE_IBV) {
+ struct ibv_wq_attr mod = {
+ .attr_mask = IBV_WQ_ATTR_STATE,
+ .wq_state = sm->state,
+ };
+
+ ret = mlx5_glue->modify_wq(rxq_ctrl->obj->wq, &mod);
+ } else { /* rxq_ctrl->obj->type == MLX5_RXQ_OBJ_TYPE_DEVX_RQ. */
+ struct mlx5_devx_modify_rq_attr rq_attr;
+
+ memset(&rq_attr, 0, sizeof(rq_attr));
+ if (sm->state == IBV_WQS_RESET) {
+ rq_attr.rq_state = MLX5_RQC_STATE_ERR;
+ rq_attr.state = MLX5_RQC_STATE_RST;
+ } else if (sm->state == IBV_WQS_RDY) {
+ rq_attr.rq_state = MLX5_RQC_STATE_RST;
+ rq_attr.state = MLX5_RQC_STATE_RDY;
+ } else if (sm->state == IBV_WQS_ERR) {
+ rq_attr.rq_state = MLX5_RQC_STATE_RDY;
+ rq_attr.state = MLX5_RQC_STATE_ERR;
+ }
+ ret = mlx5_devx_cmd_modify_rq(rxq_ctrl->obj->rq,
+ &rq_attr);
+ }
+ if (ret) {
+ DRV_LOG(ERR, "Cannot change Rx WQ state to %u - %s",
+ sm->state, strerror(errno));
+ rte_errno = errno;
+ return ret;
+ }
} else {
- mpw->data.raw = (volatile void *)(mpw->wqe + 1);
+ struct mlx5_txq_data *txq = (*priv->txqs)[sm->queue_id];
+ struct mlx5_txq_ctrl *txq_ctrl =
+ container_of(txq, struct mlx5_txq_ctrl, txq);
+ struct ibv_qp_attr mod = {
+ .qp_state = IBV_QPS_RESET,
+ .port_num = (uint8_t)priv->ibv_port,
+ };
+ struct ibv_qp *qp = txq_ctrl->obj->qp;
+
+ ret = mlx5_glue->modify_qp(qp, &mod, IBV_QP_STATE);
+ if (ret) {
+ DRV_LOG(ERR, "Cannot change the Tx QP state to RESET "
+ "%s", strerror(errno));
+ rte_errno = errno;
+ return ret;
+ }
+ mod.qp_state = IBV_QPS_INIT;
+ ret = mlx5_glue->modify_qp(qp, &mod,
+ (IBV_QP_STATE | IBV_QP_PORT));
+ if (ret) {
+ DRV_LOG(ERR, "Cannot change Tx QP state to INIT %s",
+ strerror(errno));
+ rte_errno = errno;
+ return ret;
+ }
+ mod.qp_state = IBV_QPS_RTR;
+ ret = mlx5_glue->modify_qp(qp, &mod, IBV_QP_STATE);
+ if (ret) {
+ DRV_LOG(ERR, "Cannot change Tx QP state to RTR %s",
+ strerror(errno));
+ rte_errno = errno;
+ return ret;
+ }
+ mod.qp_state = IBV_QPS_RTS;
+ ret = mlx5_glue->modify_qp(qp, &mod, IBV_QP_STATE);
+ if (ret) {
+ DRV_LOG(ERR, "Cannot change Tx QP state to RTS %s",
+ strerror(errno));
+ rte_errno = errno;
+ return ret;
+ }
}
+ return 0;
}
/**
- * Close an Enhanced MPW session.
+ * Modify a Verbs queue state.
*
- * @param txq
- * Pointer to TX queue structure.
- * @param mpw
- * Pointer to MPW session structure.
+ * @param dev
+ * Pointer to Ethernet device.
+ * @param sm
+ * State modify request parameters.
*
* @return
- * Number of consumed WQEs.
+ * 0 in case of success else non-zero value.
*/
-static inline uint16_t
-mlx5_empw_close(struct mlx5_txq_data *txq, struct mlx5_mpw *mpw)
+static int
+mlx5_queue_state_modify(struct rte_eth_dev *dev,
+ struct mlx5_mp_arg_queue_state_modify *sm)
{
- uint16_t ret;
+ int ret = 0;
- /* Store size in multiple of 16 bytes. Control and Ethernet segments
- * count as 2.
- */
- mpw->wqe->ctrl[1] = rte_cpu_to_be_32(txq->qp_num_8s |
- MLX5_WQE_DS(mpw->total_len));
- mpw->state = MLX5_MPW_STATE_CLOSED;
- ret = (mpw->total_len + (MLX5_WQE_SIZE - 1)) / MLX5_WQE_SIZE;
- txq->wqe_ci += ret;
+ switch (rte_eal_process_type()) {
+ case RTE_PROC_PRIMARY:
+ ret = mlx5_queue_state_modify_primary(dev, sm);
+ break;
+ case RTE_PROC_SECONDARY:
+ ret = mlx5_mp_req_queue_state_modify(dev, sm);
+ break;
+ default:
+ break;
+ }
return ret;
}
/**
- * DPDK callback for TX with Enhanced MPW support.
+ * Handle a Rx error.
+ * The function inserts the RQ state to reset when the first error CQE is
+ * shown, then drains the CQ by the caller function loop. When the CQ is empty,
+ * it moves the RQ state to ready and initializes the RQ.
+ * Next CQE identification and error counting are in the caller responsibility.
*
- * @param dpdk_txq
- * Generic pointer to TX queue structure.
- * @param[in] pkts
- * Packets to transmit.
- * @param pkts_n
- * Number of packets in array.
+ * @param[in] rxq
+ * Pointer to RX queue structure.
+ * @param[in] vec
+ * 1 when called from vectorized Rx burst, need to prepare mbufs for the RQ.
+ * 0 when called from non-vectorized Rx burst.
*
* @return
- * Number of packets successfully transmitted (<= pkts_n).
+ * -1 in case of recovery error, otherwise the CQE status.
*/
-uint16_t
-mlx5_tx_burst_empw(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n)
+int
+mlx5_rx_err_handle(struct mlx5_rxq_data *rxq, uint8_t vec)
{
- struct mlx5_txq_data *txq = (struct mlx5_txq_data *)dpdk_txq;
- uint16_t elts_head = txq->elts_head;
- const uint16_t elts_n = 1 << txq->elts_n;
- const uint16_t elts_m = elts_n - 1;
- unsigned int i = 0;
- unsigned int j = 0;
- uint16_t max_elts;
- uint16_t max_wqe;
- unsigned int max_inline = txq->max_inline * RTE_CACHE_LINE_SIZE;
- unsigned int mpw_room = 0;
- unsigned int inl_pad = 0;
- uint32_t inl_hdr;
- struct mlx5_mpw mpw = {
- .state = MLX5_MPW_STATE_CLOSED,
+ const uint16_t cqe_n = 1 << rxq->cqe_n;
+ const uint16_t cqe_mask = cqe_n - 1;
+ const unsigned int wqe_n = 1 << rxq->elts_n;
+ struct mlx5_rxq_ctrl *rxq_ctrl =
+ container_of(rxq, struct mlx5_rxq_ctrl, rxq);
+ union {
+ volatile struct mlx5_cqe *cqe;
+ volatile struct mlx5_err_cqe *err_cqe;
+ } u = {
+ .cqe = &(*rxq->cqes)[rxq->cq_ci & cqe_mask],
};
+ struct mlx5_mp_arg_queue_state_modify sm;
+ int ret;
- if (unlikely(!pkts_n))
- return 0;
- /* Start processing. */
- mlx5_tx_complete(txq);
- max_elts = (elts_n - (elts_head - txq->elts_tail));
- /* A CQE slot must always be available. */
- assert((1u << txq->cqe_n) - (txq->cq_pi - txq->cq_ci));
- max_wqe = (1u << txq->wqe_n) - (txq->wqe_ci - txq->wqe_pi);
- if (unlikely(!max_wqe))
- return 0;
- do {
- struct rte_mbuf *buf = *(pkts++);
- uintptr_t addr;
- uint64_t naddr;
- unsigned int n;
- unsigned int do_inline = 0; /* Whether inline is possible. */
- uint32_t length;
- unsigned int segs_n = buf->nb_segs;
- uint32_t cs_flags = 0;
-
- /*
- * Make sure there is enough room to store this packet and
- * that one ring entry remains unused.
- */
- assert(segs_n);
- if (max_elts - j < segs_n)
- break;
- /* Do not bother with large packets MPW cannot handle. */
- if (segs_n > MLX5_MPW_DSEG_MAX) {
- txq->stats.oerrors++;
- break;
- }
- /* Should we enable HW CKSUM offload. */
- if (buf->ol_flags &
- (PKT_TX_IP_CKSUM | PKT_TX_TCP_CKSUM | PKT_TX_UDP_CKSUM))
- cs_flags = MLX5_ETH_WQE_L3_CSUM | MLX5_ETH_WQE_L4_CSUM;
- /* Retrieve packet information. */
- length = PKT_LEN(buf);
- /* Start new session if:
- * - multi-segment packet
- * - no space left even for a dseg
- * - next packet can be inlined with a new WQE
- * - cs_flag differs
- * It can't be MLX5_MPW_STATE_OPENED as always have a single
- * segmented packet.
- */
- if (mpw.state == MLX5_MPW_ENHANCED_STATE_OPENED) {
- if ((segs_n != 1) ||
- (inl_pad + sizeof(struct mlx5_wqe_data_seg) >
- mpw_room) ||
- (length <= txq->inline_max_packet_sz &&
- inl_pad + sizeof(inl_hdr) + length >
- mpw_room) ||
- (mpw.wqe->eseg.cs_flags != cs_flags))
- max_wqe -= mlx5_empw_close(txq, &mpw);
- }
- if (unlikely(mpw.state == MLX5_MPW_STATE_CLOSED)) {
- if (unlikely(segs_n != 1)) {
- /* Fall back to legacy MPW.
- * A MPW session consumes 2 WQEs at most to
- * include MLX5_MPW_DSEG_MAX pointers.
- */
- if (unlikely(max_wqe < 2))
- break;
- mlx5_mpw_new(txq, &mpw, length);
- } else {
- /* In Enhanced MPW, inline as much as the budget
- * is allowed. The remaining space is to be
- * filled with dsegs. If the title WQEBB isn't
- * padded, it will have 2 dsegs there.
- */
- mpw_room = RTE_MIN(MLX5_WQE_SIZE_MAX,
- (max_inline ? max_inline :
- pkts_n * MLX5_WQE_DWORD_SIZE) +
- MLX5_WQE_SIZE);
- if (unlikely(max_wqe * MLX5_WQE_SIZE <
- mpw_room))
- break;
- /* Don't pad the title WQEBB to not waste WQ. */
- mlx5_empw_new(txq, &mpw, 0);
- mpw_room -= mpw.total_len;
- inl_pad = 0;
- do_inline =
- length <= txq->inline_max_packet_sz &&
- sizeof(inl_hdr) + length <= mpw_room &&
- !txq->mpw_hdr_dseg;
- }
- mpw.wqe->eseg.cs_flags = cs_flags;
- } else {
- /* Evaluate whether the next packet can be inlined.
- * Inlininig is possible when:
- * - length is less than configured value
- * - length fits for remaining space
- * - not required to fill the title WQEBB with dsegs
- */
- do_inline =
- length <= txq->inline_max_packet_sz &&
- inl_pad + sizeof(inl_hdr) + length <=
- mpw_room &&
- (!txq->mpw_hdr_dseg ||
- mpw.total_len >= MLX5_WQE_SIZE);
+ switch (rxq->err_state) {
+ case MLX5_RXQ_ERR_STATE_NO_ERROR:
+ rxq->err_state = MLX5_RXQ_ERR_STATE_NEED_RESET;
+ /* Fall-through */
+ case MLX5_RXQ_ERR_STATE_NEED_RESET:
+ sm.is_wq = 1;
+ sm.queue_id = rxq->idx;
+ sm.state = IBV_WQS_RESET;
+ if (mlx5_queue_state_modify(ETH_DEV(rxq_ctrl->priv), &sm))
+ return -1;
+ if (rxq_ctrl->dump_file_n <
+ rxq_ctrl->priv->config.max_dump_files_num) {
+ MKSTR(err_str, "Unexpected CQE error syndrome "
+ "0x%02x CQN = %u RQN = %u wqe_counter = %u"
+ " rq_ci = %u cq_ci = %u", u.err_cqe->syndrome,
+ rxq->cqn, rxq_ctrl->wqn,
+ rte_be_to_cpu_16(u.err_cqe->wqe_counter),
+ rxq->rq_ci << rxq->sges_n, rxq->cq_ci);
+ MKSTR(name, "dpdk_mlx5_port_%u_rxq_%u_%u",
+ rxq->port_id, rxq->idx, (uint32_t)rte_rdtsc());
+ mlx5_dump_debug_information(name, NULL, err_str, 0);
+ mlx5_dump_debug_information(name, "MLX5 Error CQ:",
+ (const void *)((uintptr_t)
+ rxq->cqes),
+ sizeof(*u.cqe) * cqe_n);
+ mlx5_dump_debug_information(name, "MLX5 Error RQ:",
+ (const void *)((uintptr_t)
+ rxq->wqes),
+ 16 * wqe_n);
+ rxq_ctrl->dump_file_n++;
}
- /* Multi-segment packets must be alone in their MPW. */
- assert((segs_n == 1) || (mpw.pkts_n == 0));
- if (unlikely(mpw.state == MLX5_MPW_STATE_OPENED)) {
-#if defined(MLX5_PMD_SOFT_COUNTERS) || !defined(NDEBUG)
- length = 0;
-#endif
- do {
- volatile struct mlx5_wqe_data_seg *dseg;
-
- assert(buf);
- (*txq->elts)[elts_head++ & elts_m] = buf;
- dseg = mpw.data.dseg[mpw.pkts_n];
- addr = rte_pktmbuf_mtod(buf, uintptr_t);
- *dseg = (struct mlx5_wqe_data_seg){
- .byte_count = rte_cpu_to_be_32(
- DATA_LEN(buf)),
- .lkey = mlx5_tx_mb2mr(txq, buf),
- .addr = rte_cpu_to_be_64(addr),
- };
-#if defined(MLX5_PMD_SOFT_COUNTERS) || !defined(NDEBUG)
- length += DATA_LEN(buf);
-#endif
- buf = buf->next;
- ++j;
- ++mpw.pkts_n;
- } while (--segs_n);
- /* A multi-segmented packet takes one MPW session.
- * TODO: Pack more multi-segmented packets if possible.
- */
- mlx5_mpw_close(txq, &mpw);
- if (mpw.pkts_n < 3)
- max_wqe--;
- else
- max_wqe -= 2;
- } else if (do_inline) {
- /* Inline packet into WQE. */
- unsigned int max;
-
- assert(mpw.state == MLX5_MPW_ENHANCED_STATE_OPENED);
- assert(length == DATA_LEN(buf));
- inl_hdr = rte_cpu_to_be_32(length | MLX5_INLINE_SEG);
- addr = rte_pktmbuf_mtod(buf, uintptr_t);
- mpw.data.raw = (volatile void *)
- ((uintptr_t)mpw.data.raw + inl_pad);
- max = tx_mlx5_wq_tailroom(txq,
- (void *)(uintptr_t)mpw.data.raw);
- /* Copy inline header. */
- mpw.data.raw = (volatile void *)
- mlx5_copy_to_wq(
- (void *)(uintptr_t)mpw.data.raw,
- &inl_hdr,
- sizeof(inl_hdr),
- (void *)(uintptr_t)txq->wqes,
- max);
- max = tx_mlx5_wq_tailroom(txq,
- (void *)(uintptr_t)mpw.data.raw);
- /* Copy packet data. */
- mpw.data.raw = (volatile void *)
- mlx5_copy_to_wq(
- (void *)(uintptr_t)mpw.data.raw,
- (void *)addr,
- length,
- (void *)(uintptr_t)txq->wqes,
- max);
- ++mpw.pkts_n;
- mpw.total_len += (inl_pad + sizeof(inl_hdr) + length);
- /* No need to get completion as the entire packet is
- * copied to WQ. Free the buf right away.
+ rxq->err_state = MLX5_RXQ_ERR_STATE_NEED_READY;
+ /* Fall-through */
+ case MLX5_RXQ_ERR_STATE_NEED_READY:
+ ret = check_cqe(u.cqe, cqe_n, rxq->cq_ci);
+ if (ret == MLX5_CQE_STATUS_HW_OWN) {
+ rte_cio_wmb();
+ *rxq->cq_db = rte_cpu_to_be_32(rxq->cq_ci);
+ rte_cio_wmb();
+ /*
+ * The RQ consumer index must be zeroed while moving
+ * from RESET state to RDY state.
*/
- rte_pktmbuf_free_seg(buf);
- mpw_room -= (inl_pad + sizeof(inl_hdr) + length);
- /* Add pad in the next packet if any. */
- inl_pad = (((uintptr_t)mpw.data.raw +
- (MLX5_WQE_DWORD_SIZE - 1)) &
- ~(MLX5_WQE_DWORD_SIZE - 1)) -
- (uintptr_t)mpw.data.raw;
- } else {
- /* No inline. Load a dseg of packet pointer. */
- volatile rte_v128u32_t *dseg;
-
- assert(mpw.state == MLX5_MPW_ENHANCED_STATE_OPENED);
- assert((inl_pad + sizeof(*dseg)) <= mpw_room);
- assert(length == DATA_LEN(buf));
- if (!tx_mlx5_wq_tailroom(txq,
- (void *)((uintptr_t)mpw.data.raw
- + inl_pad)))
- dseg = (volatile void *)txq->wqes;
- else
- dseg = (volatile void *)
- ((uintptr_t)mpw.data.raw +
- inl_pad);
- (*txq->elts)[elts_head++ & elts_m] = buf;
- addr = rte_pktmbuf_mtod(buf, uintptr_t);
- for (n = 0; n * RTE_CACHE_LINE_SIZE < length; n++)
- rte_prefetch2((void *)(addr +
- n * RTE_CACHE_LINE_SIZE));
- naddr = rte_cpu_to_be_64(addr);
- *dseg = (rte_v128u32_t) {
- rte_cpu_to_be_32(length),
- mlx5_tx_mb2mr(txq, buf),
- naddr,
- naddr >> 32,
- };
- mpw.data.raw = (volatile void *)(dseg + 1);
- mpw.total_len += (inl_pad + sizeof(*dseg));
- ++j;
- ++mpw.pkts_n;
- mpw_room -= (inl_pad + sizeof(*dseg));
- inl_pad = 0;
+ *rxq->rq_db = rte_cpu_to_be_32(0);
+ rte_cio_wmb();
+ sm.is_wq = 1;
+ sm.queue_id = rxq->idx;
+ sm.state = IBV_WQS_RDY;
+ if (mlx5_queue_state_modify(ETH_DEV(rxq_ctrl->priv),
+ &sm))
+ return -1;
+ if (vec) {
+ const uint16_t q_mask = wqe_n - 1;
+ uint16_t elt_idx;
+ struct rte_mbuf **elt;
+ int i;
+ unsigned int n = wqe_n - (rxq->rq_ci -
+ rxq->rq_pi);
+
+ for (i = 0; i < (int)n; ++i) {
+ elt_idx = (rxq->rq_ci + i) & q_mask;
+ elt = &(*rxq->elts)[elt_idx];
+ *elt = rte_mbuf_raw_alloc(rxq->mp);
+ if (!*elt) {
+ for (i--; i >= 0; --i) {
+ elt_idx = (rxq->rq_ci +
+ i) & q_mask;
+ elt = &(*rxq->elts)
+ [elt_idx];
+ rte_pktmbuf_free_seg
+ (*elt);
+ }
+ return -1;
+ }
+ }
+ for (i = 0; i < (int)wqe_n; ++i) {
+ elt = &(*rxq->elts)[i];
+ DATA_LEN(*elt) =
+ (uint16_t)((*elt)->buf_len -
+ rte_pktmbuf_headroom(*elt));
+ }
+ /* Padding with a fake mbuf for vec Rx. */
+ for (i = 0; i < MLX5_VPMD_DESCS_PER_LOOP; ++i)
+ (*rxq->elts)[wqe_n + i] =
+ &rxq->fake_mbuf;
+ }
+ mlx5_rxq_initialize(rxq);
+ rxq->err_state = MLX5_RXQ_ERR_STATE_NO_ERROR;
}
-#ifdef MLX5_PMD_SOFT_COUNTERS
- /* Increment sent bytes counter. */
- txq->stats.obytes += length;
-#endif
- ++i;
- } while (i < pkts_n);
- /* Take a shortcut if nothing must be sent. */
- if (unlikely(i == 0))
- return 0;
- /* Check whether completion threshold has been reached. */
- if (txq->elts_comp + j >= MLX5_TX_COMP_THRESH ||
- (uint16_t)(txq->wqe_ci - txq->mpw_comp) >=
- (1 << txq->wqe_n) / MLX5_TX_COMP_THRESH_INLINE_DIV) {
- volatile struct mlx5_wqe *wqe = mpw.wqe;
-
- /* Request completion on last WQE. */
- wqe->ctrl[2] = rte_cpu_to_be_32(8);
- /* Save elts_head in unused "immediate" field of WQE. */
- wqe->ctrl[3] = elts_head;
- txq->elts_comp = 0;
- txq->mpw_comp = txq->wqe_ci;
- txq->cq_pi++;
- } else {
- txq->elts_comp += j;
+ return ret;
+ default:
+ return -1;
}
-#ifdef MLX5_PMD_SOFT_COUNTERS
- /* Increment sent packets counter. */
- txq->stats.opackets += i;
-#endif
- if (mpw.state == MLX5_MPW_ENHANCED_STATE_OPENED)
- mlx5_empw_close(txq, &mpw);
- else if (mpw.state == MLX5_MPW_STATE_OPENED)
- mlx5_mpw_close(txq, &mpw);
- /* Ring QP doorbell. */
- mlx5_tx_dbrec(txq, mpw.wqe);
- txq->elts_head = elts_head;
- return i;
-}
-
-/**
- * Translate RX completion flags to packet type.
- *
- * @param[in] cqe
- * Pointer to CQE.
- *
- * @note: fix mlx5_dev_supported_ptypes_get() if any change here.
- *
- * @return
- * Packet type for struct rte_mbuf.
- */
-static inline uint32_t
-rxq_cq_to_pkt_type(volatile struct mlx5_cqe *cqe)
-{
- uint8_t idx;
- uint8_t pinfo = cqe->pkt_info;
- uint16_t ptype = cqe->hdr_type_etc;
-
- /*
- * The index to the array should have:
- * bit[1:0] = l3_hdr_type
- * bit[4:2] = l4_hdr_type
- * bit[5] = ip_frag
- * bit[6] = tunneled
- * bit[7] = outer_l3_type
- */
- idx = ((pinfo & 0x3) << 6) | ((ptype & 0xfc00) >> 10);
- return mlx5_ptype_table[idx];
}
/**
* Pointer to RX queue.
* @param cqe
* CQE to process.
- * @param[out] rss_hash
- * Packet RSS Hash result.
+ * @param[out] mcqe
+ * Store pointer to mini-CQE if compressed. Otherwise, the pointer is not
+ * written.
*
* @return
- * Packet size in bytes (0 if there is none), -1 in case of completion
- * with error.
+ * 0 in case of empty CQE, otherwise the packet size in bytes.
*/
static inline int
mlx5_rx_poll_len(struct mlx5_rxq_data *rxq, volatile struct mlx5_cqe *cqe,
- uint16_t cqe_cnt, uint32_t *rss_hash)
+ uint16_t cqe_cnt, volatile struct mlx5_mini_cqe8 **mcqe)
{
struct rxq_zip *zip = &rxq->zip;
uint16_t cqe_n = cqe_cnt + 1;
- int len = 0;
+ int len;
uint16_t idx, end;
- /* Process compressed data in the CQE and mini arrays. */
- if (zip->ai) {
- volatile struct mlx5_mini_cqe8 (*mc)[8] =
- (volatile struct mlx5_mini_cqe8 (*)[8])
- (uintptr_t)(&(*rxq->cqes)[zip->ca & cqe_cnt].pkt_info);
-
- len = rte_be_to_cpu_32((*mc)[zip->ai & 7].byte_cnt);
- *rss_hash = rte_be_to_cpu_32((*mc)[zip->ai & 7].rx_hash_result);
- if ((++zip->ai & 7) == 0) {
- /* Invalidate consumed CQEs */
- idx = zip->ca;
- end = zip->na;
- while (idx != end) {
- (*rxq->cqes)[idx & cqe_cnt].op_own =
- MLX5_CQE_INVALIDATE;
- ++idx;
- }
- /*
- * Increment consumer index to skip the number of
- * CQEs consumed. Hardware leaves holes in the CQ
- * ring for software use.
- */
- zip->ca = zip->na;
- zip->na += 8;
- }
- if (unlikely(rxq->zip.ai == rxq->zip.cqe_cnt)) {
- /* Invalidate the rest */
- idx = zip->ca;
- end = zip->cq_ci;
-
- while (idx != end) {
- (*rxq->cqes)[idx & cqe_cnt].op_own =
- MLX5_CQE_INVALIDATE;
- ++idx;
- }
- rxq->cq_ci = zip->cq_ci;
- zip->ai = 0;
- }
- /* No compressed data, get next CQE and verify if it is compressed. */
- } else {
- int ret;
- int8_t op_own;
-
- ret = check_cqe(cqe, cqe_n, rxq->cq_ci);
- if (unlikely(ret == 1))
- return 0;
- ++rxq->cq_ci;
- op_own = cqe->op_own;
- if (MLX5_CQE_FORMAT(op_own) == MLX5_COMPRESSED) {
+ do {
+ len = 0;
+ /* Process compressed data in the CQE and mini arrays. */
+ if (zip->ai) {
volatile struct mlx5_mini_cqe8 (*mc)[8] =
(volatile struct mlx5_mini_cqe8 (*)[8])
- (uintptr_t)(&(*rxq->cqes)[rxq->cq_ci &
+ (uintptr_t)(&(*rxq->cqes)[zip->ca &
cqe_cnt].pkt_info);
- /* Fix endianness. */
- zip->cqe_cnt = rte_be_to_cpu_32(cqe->byte_cnt);
- /*
- * Current mini array position is the one returned by
- * check_cqe64().
- *
- * If completion comprises several mini arrays, as a
- * special case the second one is located 7 CQEs after
- * the initial CQE instead of 8 for subsequent ones.
- */
- zip->ca = rxq->cq_ci;
- zip->na = zip->ca + 7;
- /* Compute the next non compressed CQE. */
- --rxq->cq_ci;
- zip->cq_ci = rxq->cq_ci + zip->cqe_cnt;
- /* Get packet size to return. */
- len = rte_be_to_cpu_32((*mc)[0].byte_cnt);
- *rss_hash = rte_be_to_cpu_32((*mc)[0].rx_hash_result);
- zip->ai = 1;
- /* Prefetch all the entries to be invalidated */
- idx = zip->ca;
- end = zip->cq_ci;
- while (idx != end) {
- rte_prefetch0(&(*rxq->cqes)[(idx) & cqe_cnt]);
- ++idx;
+ len = rte_be_to_cpu_32((*mc)[zip->ai & 7].byte_cnt);
+ *mcqe = &(*mc)[zip->ai & 7];
+ if ((++zip->ai & 7) == 0) {
+ /* Invalidate consumed CQEs */
+ idx = zip->ca;
+ end = zip->na;
+ while (idx != end) {
+ (*rxq->cqes)[idx & cqe_cnt].op_own =
+ MLX5_CQE_INVALIDATE;
+ ++idx;
+ }
+ /*
+ * Increment consumer index to skip the number
+ * of CQEs consumed. Hardware leaves holes in
+ * the CQ ring for software use.
+ */
+ zip->ca = zip->na;
+ zip->na += 8;
}
+ if (unlikely(rxq->zip.ai == rxq->zip.cqe_cnt)) {
+ /* Invalidate the rest */
+ idx = zip->ca;
+ end = zip->cq_ci;
+
+ while (idx != end) {
+ (*rxq->cqes)[idx & cqe_cnt].op_own =
+ MLX5_CQE_INVALIDATE;
+ ++idx;
+ }
+ rxq->cq_ci = zip->cq_ci;
+ zip->ai = 0;
+ }
+ /*
+ * No compressed data, get next CQE and verify if it is
+ * compressed.
+ */
} else {
- len = rte_be_to_cpu_32(cqe->byte_cnt);
- *rss_hash = rte_be_to_cpu_32(cqe->rx_hash_res);
- }
- /* Error while receiving packet. */
- if (unlikely(MLX5_CQE_OPCODE(op_own) == MLX5_CQE_RESP_ERR))
- return -1;
- }
- return len;
-}
+ int ret;
+ int8_t op_own;
-/**
- * Translate RX completion flags to offload flags.
- *
- * @param[in] rxq
- * Pointer to RX queue structure.
+ ret = check_cqe(cqe, cqe_n, rxq->cq_ci);
+ if (unlikely(ret != MLX5_CQE_STATUS_SW_OWN)) {
+ if (unlikely(ret == MLX5_CQE_STATUS_ERR ||
+ rxq->err_state)) {
+ ret = mlx5_rx_err_handle(rxq, 0);
+ if (ret == MLX5_CQE_STATUS_HW_OWN ||
+ ret == -1)
+ return 0;
+ } else {
+ return 0;
+ }
+ }
+ ++rxq->cq_ci;
+ op_own = cqe->op_own;
+ if (MLX5_CQE_FORMAT(op_own) == MLX5_COMPRESSED) {
+ volatile struct mlx5_mini_cqe8 (*mc)[8] =
+ (volatile struct mlx5_mini_cqe8 (*)[8])
+ (uintptr_t)(&(*rxq->cqes)
+ [rxq->cq_ci &
+ cqe_cnt].pkt_info);
+
+ /* Fix endianness. */
+ zip->cqe_cnt = rte_be_to_cpu_32(cqe->byte_cnt);
+ /*
+ * Current mini array position is the one
+ * returned by check_cqe64().
+ *
+ * If completion comprises several mini arrays,
+ * as a special case the second one is located
+ * 7 CQEs after the initial CQE instead of 8
+ * for subsequent ones.
+ */
+ zip->ca = rxq->cq_ci;
+ zip->na = zip->ca + 7;
+ /* Compute the next non compressed CQE. */
+ --rxq->cq_ci;
+ zip->cq_ci = rxq->cq_ci + zip->cqe_cnt;
+ /* Get packet size to return. */
+ len = rte_be_to_cpu_32((*mc)[0].byte_cnt);
+ *mcqe = &(*mc)[0];
+ zip->ai = 1;
+ /* Prefetch all to be invalidated */
+ idx = zip->ca;
+ end = zip->cq_ci;
+ while (idx != end) {
+ rte_prefetch0(&(*rxq->cqes)[(idx) &
+ cqe_cnt]);
+ ++idx;
+ }
+ } else {
+ len = rte_be_to_cpu_32(cqe->byte_cnt);
+ }
+ }
+ if (unlikely(rxq->err_state)) {
+ cqe = &(*rxq->cqes)[rxq->cq_ci & cqe_cnt];
+ ++rxq->stats.idropped;
+ } else {
+ return len;
+ }
+ } while (1);
+}
+
+/**
+ * Translate RX completion flags to offload flags.
+ *
* @param[in] cqe
* Pointer to CQE.
*
* Offload flags (ol_flags) for struct rte_mbuf.
*/
static inline uint32_t
-rxq_cq_to_ol_flags(struct mlx5_rxq_data *rxq, volatile struct mlx5_cqe *cqe)
+rxq_cq_to_ol_flags(volatile struct mlx5_cqe *cqe)
{
uint32_t ol_flags = 0;
uint16_t flags = rte_be_to_cpu_16(cqe->hdr_type_etc);
TRANSPOSE(flags,
MLX5_CQE_RX_L4_HDR_VALID,
PKT_RX_L4_CKSUM_GOOD);
- if ((cqe->pkt_info & MLX5_CQE_RX_TUNNEL_PACKET) && (rxq->csum_l2tun))
- ol_flags |=
- TRANSPOSE(flags,
- MLX5_CQE_RX_L3_HDR_VALID,
- PKT_RX_IP_CKSUM_GOOD) |
- TRANSPOSE(flags,
- MLX5_CQE_RX_L4_HDR_VALID,
- PKT_RX_L4_CKSUM_GOOD);
return ol_flags;
}
+/**
+ * Fill in mbuf fields from RX completion flags.
+ * Note that pkt->ol_flags should be initialized outside of this function.
+ *
+ * @param rxq
+ * Pointer to RX queue.
+ * @param pkt
+ * mbuf to fill.
+ * @param cqe
+ * CQE to process.
+ * @param rss_hash_res
+ * Packet RSS Hash result.
+ */
+static inline void
+rxq_cq_to_mbuf(struct mlx5_rxq_data *rxq, struct rte_mbuf *pkt,
+ volatile struct mlx5_cqe *cqe, uint32_t rss_hash_res)
+{
+ /* Update packet information. */
+ pkt->packet_type = rxq_cq_to_pkt_type(rxq, cqe);
+ if (rss_hash_res && rxq->rss_hash) {
+ pkt->hash.rss = rss_hash_res;
+ pkt->ol_flags |= PKT_RX_RSS_HASH;
+ }
+ if (rxq->mark && MLX5_FLOW_MARK_IS_VALID(cqe->sop_drop_qpn)) {
+ pkt->ol_flags |= PKT_RX_FDIR;
+ if (cqe->sop_drop_qpn !=
+ rte_cpu_to_be_32(MLX5_FLOW_MARK_DEFAULT)) {
+ uint32_t mark = cqe->sop_drop_qpn;
+
+ pkt->ol_flags |= PKT_RX_FDIR_ID;
+ pkt->hash.fdir.hi = mlx5_flow_mark_get(mark);
+ }
+ }
+ if (rxq->csum)
+ pkt->ol_flags |= rxq_cq_to_ol_flags(cqe);
+ if (rxq->vlan_strip &&
+ (cqe->hdr_type_etc & rte_cpu_to_be_16(MLX5_CQE_VLAN_STRIPPED))) {
+ pkt->ol_flags |= PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED;
+ pkt->vlan_tci = rte_be_to_cpu_16(cqe->vlan_info);
+ }
+ if (rxq->hw_timestamp) {
+ pkt->timestamp = rte_be_to_cpu_64(cqe->timestamp);
+ pkt->ol_flags |= PKT_RX_TIMESTAMP;
+ }
+}
+
/**
* DPDK callback for RX.
*
while (pkts_n) {
unsigned int idx = rq_ci & wqe_cnt;
- volatile struct mlx5_wqe_data_seg *wqe = &(*rxq->wqes)[idx];
+ volatile struct mlx5_wqe_data_seg *wqe =
+ &((volatile struct mlx5_wqe_data_seg *)rxq->wqes)[idx];
struct rte_mbuf *rep = (*rxq->elts)[idx];
- uint32_t rss_hash_res = 0;
+ volatile struct mlx5_mini_cqe8 *mcqe = NULL;
+ uint32_t rss_hash_res;
if (pkt)
NEXT(seg) = rep;
}
if (!pkt) {
cqe = &(*rxq->cqes)[rxq->cq_ci & cqe_cnt];
- len = mlx5_rx_poll_len(rxq, cqe, cqe_cnt,
- &rss_hash_res);
+ len = mlx5_rx_poll_len(rxq, cqe, cqe_cnt, &mcqe);
if (!len) {
rte_mbuf_raw_free(rep);
break;
}
- if (unlikely(len == -1)) {
- /* RX error, packet is likely too large. */
- rte_mbuf_raw_free(rep);
- ++rxq->stats.idropped;
- goto skip;
- }
pkt = seg;
assert(len >= (rxq->crc_present << 2));
- /* Update packet information. */
- pkt->packet_type = rxq_cq_to_pkt_type(cqe);
pkt->ol_flags = 0;
- if (rss_hash_res && rxq->rss_hash) {
- pkt->hash.rss = rss_hash_res;
- pkt->ol_flags = PKT_RX_RSS_HASH;
- }
- if (rxq->mark &&
- MLX5_FLOW_MARK_IS_VALID(cqe->sop_drop_qpn)) {
- pkt->ol_flags |= PKT_RX_FDIR;
- if (cqe->sop_drop_qpn !=
- rte_cpu_to_be_32(MLX5_FLOW_MARK_DEFAULT)) {
- uint32_t mark = cqe->sop_drop_qpn;
-
- pkt->ol_flags |= PKT_RX_FDIR_ID;
- pkt->hash.fdir.hi =
- mlx5_flow_mark_get(mark);
- }
- }
- if (rxq->csum | rxq->csum_l2tun)
- pkt->ol_flags |= rxq_cq_to_ol_flags(rxq, cqe);
- if (rxq->vlan_strip &&
- (cqe->hdr_type_etc &
- rte_cpu_to_be_16(MLX5_CQE_VLAN_STRIPPED))) {
- pkt->ol_flags |= PKT_RX_VLAN_PKT |
- PKT_RX_VLAN_STRIPPED;
- pkt->vlan_tci =
- rte_be_to_cpu_16(cqe->vlan_info);
- }
+ /* If compressed, take hash result from mini-CQE. */
+ rss_hash_res = rte_be_to_cpu_32(mcqe == NULL ?
+ cqe->rx_hash_res :
+ mcqe->rx_hash_result);
+ rxq_cq_to_mbuf(rxq, pkt, cqe, rss_hash_res);
if (rxq->crc_present)
- len -= ETHER_CRC_LEN;
+ len -= RTE_ETHER_CRC_LEN;
PKT_LEN(pkt) = len;
+ if (cqe->lro_num_seg > 1) {
+ mlx5_lro_update_hdr
+ (rte_pktmbuf_mtod(pkt, uint8_t *), cqe,
+ len);
+ pkt->ol_flags |= PKT_RX_LRO;
+ pkt->tso_segsz = len / cqe->lro_num_seg;
+ }
}
DATA_LEN(rep) = DATA_LEN(seg);
PKT_LEN(rep) = PKT_LEN(seg);
* changes.
*/
wqe->addr = rte_cpu_to_be_64(rte_pktmbuf_mtod(rep, uintptr_t));
+ /* If there's only one MR, no need to replace LKey in WQE. */
+ if (unlikely(mlx5_mr_btree_len(&rxq->mr_ctrl.cache_bh) > 1))
+ wqe->lkey = mlx5_rx_mb2mr(rxq, rep);
if (len > DATA_LEN(seg)) {
len -= DATA_LEN(seg);
++NB_SEGS(pkt);
pkt = NULL;
--pkts_n;
++i;
-skip:
/* Align consumer index to the next stride. */
rq_ci >>= sges_n;
++rq_ci;
return 0;
/* Update the consumer index. */
rxq->rq_ci = rq_ci >> sges_n;
- rte_io_wmb();
+ rte_cio_wmb();
*rxq->cq_db = rte_cpu_to_be_32(rxq->cq_ci);
- rte_io_wmb();
+ rte_cio_wmb();
*rxq->rq_db = rte_cpu_to_be_32(rxq->rq_ci);
#ifdef MLX5_PMD_SOFT_COUNTERS
/* Increment packets counter. */
return i;
}
+/**
+ * Update LRO packet TCP header.
+ * The HW LRO feature doesn't update the TCP header after coalescing the
+ * TCP segments but supplies information in CQE to fill it by SW.
+ *
+ * @param tcp
+ * Pointer to the TCP header.
+ * @param cqe
+ * Pointer to the completion entry..
+ * @param phcsum
+ * The L3 pseudo-header checksum.
+ */
+static inline void
+mlx5_lro_update_tcp_hdr(struct rte_tcp_hdr *restrict tcp,
+ volatile struct mlx5_cqe *restrict cqe,
+ uint32_t phcsum)
+{
+ uint8_t l4_type = (rte_be_to_cpu_16(cqe->hdr_type_etc) &
+ MLX5_CQE_L4_TYPE_MASK) >> MLX5_CQE_L4_TYPE_SHIFT;
+ /*
+ * The HW calculates only the TCP payload checksum, need to complete
+ * the TCP header checksum and the L3 pseudo-header checksum.
+ */
+ uint32_t csum = phcsum + cqe->csum;
+
+ if (l4_type == MLX5_L4_HDR_TYPE_TCP_EMPTY_ACK ||
+ l4_type == MLX5_L4_HDR_TYPE_TCP_WITH_ACL) {
+ tcp->tcp_flags |= RTE_TCP_ACK_FLAG;
+ tcp->recv_ack = cqe->lro_ack_seq_num;
+ tcp->rx_win = cqe->lro_tcp_win;
+ }
+ if (cqe->lro_tcppsh_abort_dupack & MLX5_CQE_LRO_PUSH_MASK)
+ tcp->tcp_flags |= RTE_TCP_PSH_FLAG;
+ tcp->cksum = 0;
+ csum += rte_raw_cksum(tcp, (tcp->data_off & 0xF) * 4);
+ csum = ((csum & 0xffff0000) >> 16) + (csum & 0xffff);
+ csum = (~csum) & 0xffff;
+ if (csum == 0)
+ csum = 0xffff;
+ tcp->cksum = csum;
+}
+
+/**
+ * Update LRO packet headers.
+ * The HW LRO feature doesn't update the L3/TCP headers after coalescing the
+ * TCP segments but supply information in CQE to fill it by SW.
+ *
+ * @param padd
+ * The packet address.
+ * @param cqe
+ * Pointer to the completion entry..
+ * @param len
+ * The packet length.
+ */
+static inline void
+mlx5_lro_update_hdr(uint8_t *restrict padd,
+ volatile struct mlx5_cqe *restrict cqe,
+ uint32_t len)
+{
+ union {
+ struct rte_ether_hdr *eth;
+ struct rte_vlan_hdr *vlan;
+ struct rte_ipv4_hdr *ipv4;
+ struct rte_ipv6_hdr *ipv6;
+ struct rte_tcp_hdr *tcp;
+ uint8_t *hdr;
+ } h = {
+ .hdr = padd,
+ };
+ uint16_t proto = h.eth->ether_type;
+ uint32_t phcsum;
+
+ h.eth++;
+ while (proto == RTE_BE16(RTE_ETHER_TYPE_VLAN) ||
+ proto == RTE_BE16(RTE_ETHER_TYPE_QINQ)) {
+ proto = h.vlan->eth_proto;
+ h.vlan++;
+ }
+ if (proto == RTE_BE16(RTE_ETHER_TYPE_IPV4)) {
+ h.ipv4->time_to_live = cqe->lro_min_ttl;
+ h.ipv4->total_length = rte_cpu_to_be_16(len - (h.hdr - padd));
+ h.ipv4->hdr_checksum = 0;
+ h.ipv4->hdr_checksum = rte_ipv4_cksum(h.ipv4);
+ phcsum = rte_ipv4_phdr_cksum(h.ipv4, 0);
+ h.ipv4++;
+ } else {
+ h.ipv6->hop_limits = cqe->lro_min_ttl;
+ h.ipv6->payload_len = rte_cpu_to_be_16(len - (h.hdr - padd) -
+ sizeof(*h.ipv6));
+ phcsum = rte_ipv6_phdr_cksum(h.ipv6, 0);
+ h.ipv6++;
+ }
+ mlx5_lro_update_tcp_hdr(h.tcp, cqe, phcsum);
+}
+
+void
+mlx5_mprq_buf_free_cb(void *addr __rte_unused, void *opaque)
+{
+ struct mlx5_mprq_buf *buf = opaque;
+
+ if (rte_atomic16_read(&buf->refcnt) == 1) {
+ rte_mempool_put(buf->mp, buf);
+ } else if (rte_atomic16_add_return(&buf->refcnt, -1) == 0) {
+ rte_atomic16_set(&buf->refcnt, 1);
+ rte_mempool_put(buf->mp, buf);
+ }
+}
+
+void
+mlx5_mprq_buf_free(struct mlx5_mprq_buf *buf)
+{
+ mlx5_mprq_buf_free_cb(NULL, buf);
+}
+
+static inline void
+mprq_buf_replace(struct mlx5_rxq_data *rxq, uint16_t rq_idx,
+ const unsigned int strd_n)
+{
+ struct mlx5_mprq_buf *rep = rxq->mprq_repl;
+ volatile struct mlx5_wqe_data_seg *wqe =
+ &((volatile struct mlx5_wqe_mprq *)rxq->wqes)[rq_idx].dseg;
+ void *addr;
+
+ assert(rep != NULL);
+ /* Replace MPRQ buf. */
+ (*rxq->mprq_bufs)[rq_idx] = rep;
+ /* Replace WQE. */
+ addr = mlx5_mprq_buf_addr(rep, strd_n);
+ wqe->addr = rte_cpu_to_be_64((uintptr_t)addr);
+ /* If there's only one MR, no need to replace LKey in WQE. */
+ if (unlikely(mlx5_mr_btree_len(&rxq->mr_ctrl.cache_bh) > 1))
+ wqe->lkey = mlx5_rx_addr2mr(rxq, (uintptr_t)addr);
+ /* Stash a mbuf for next replacement. */
+ if (likely(!rte_mempool_get(rxq->mprq_mp, (void **)&rep)))
+ rxq->mprq_repl = rep;
+ else
+ rxq->mprq_repl = NULL;
+}
+
+/**
+ * DPDK callback for RX with Multi-Packet RQ support.
+ *
+ * @param dpdk_rxq
+ * Generic pointer to RX queue structure.
+ * @param[out] pkts
+ * Array to store received packets.
+ * @param pkts_n
+ * Maximum number of packets in array.
+ *
+ * @return
+ * Number of packets successfully received (<= pkts_n).
+ */
+uint16_t
+mlx5_rx_burst_mprq(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n)
+{
+ struct mlx5_rxq_data *rxq = dpdk_rxq;
+ const unsigned int strd_n = 1 << rxq->strd_num_n;
+ const unsigned int strd_sz = 1 << rxq->strd_sz_n;
+ const unsigned int strd_shift =
+ MLX5_MPRQ_STRIDE_SHIFT_BYTE * rxq->strd_shift_en;
+ const unsigned int cq_mask = (1 << rxq->cqe_n) - 1;
+ const unsigned int wq_mask = (1 << rxq->elts_n) - 1;
+ volatile struct mlx5_cqe *cqe = &(*rxq->cqes)[rxq->cq_ci & cq_mask];
+ unsigned int i = 0;
+ uint32_t rq_ci = rxq->rq_ci;
+ uint16_t consumed_strd = rxq->consumed_strd;
+ uint16_t headroom_sz = rxq->strd_headroom_en * RTE_PKTMBUF_HEADROOM;
+ struct mlx5_mprq_buf *buf = (*rxq->mprq_bufs)[rq_ci & wq_mask];
+
+ while (i < pkts_n) {
+ struct rte_mbuf *pkt;
+ void *addr;
+ int ret;
+ unsigned int len;
+ uint16_t strd_cnt;
+ uint16_t strd_idx;
+ uint32_t offset;
+ uint32_t byte_cnt;
+ volatile struct mlx5_mini_cqe8 *mcqe = NULL;
+ uint32_t rss_hash_res = 0;
+ uint8_t lro_num_seg;
+
+ if (consumed_strd == strd_n) {
+ /* Replace WQE only if the buffer is still in use. */
+ if (rte_atomic16_read(&buf->refcnt) > 1) {
+ mprq_buf_replace(rxq, rq_ci & wq_mask, strd_n);
+ /* Release the old buffer. */
+ mlx5_mprq_buf_free(buf);
+ } else if (unlikely(rxq->mprq_repl == NULL)) {
+ struct mlx5_mprq_buf *rep;
+
+ /*
+ * Currently, the MPRQ mempool is out of buffer
+ * and doing memcpy regardless of the size of Rx
+ * packet. Retry allocation to get back to
+ * normal.
+ */
+ if (!rte_mempool_get(rxq->mprq_mp,
+ (void **)&rep))
+ rxq->mprq_repl = rep;
+ }
+ /* Advance to the next WQE. */
+ consumed_strd = 0;
+ ++rq_ci;
+ buf = (*rxq->mprq_bufs)[rq_ci & wq_mask];
+ }
+ cqe = &(*rxq->cqes)[rxq->cq_ci & cq_mask];
+ ret = mlx5_rx_poll_len(rxq, cqe, cq_mask, &mcqe);
+ if (!ret)
+ break;
+ byte_cnt = ret;
+ strd_cnt = (byte_cnt & MLX5_MPRQ_STRIDE_NUM_MASK) >>
+ MLX5_MPRQ_STRIDE_NUM_SHIFT;
+ assert(strd_cnt);
+ consumed_strd += strd_cnt;
+ if (byte_cnt & MLX5_MPRQ_FILLER_MASK)
+ continue;
+ if (mcqe == NULL) {
+ rss_hash_res = rte_be_to_cpu_32(cqe->rx_hash_res);
+ strd_idx = rte_be_to_cpu_16(cqe->wqe_counter);
+ } else {
+ /* mini-CQE for MPRQ doesn't have hash result. */
+ strd_idx = rte_be_to_cpu_16(mcqe->stride_idx);
+ }
+ assert(strd_idx < strd_n);
+ assert(!((rte_be_to_cpu_16(cqe->wqe_id) ^ rq_ci) & wq_mask));
+ lro_num_seg = cqe->lro_num_seg;
+ /*
+ * Currently configured to receive a packet per a stride. But if
+ * MTU is adjusted through kernel interface, device could
+ * consume multiple strides without raising an error. In this
+ * case, the packet should be dropped because it is bigger than
+ * the max_rx_pkt_len.
+ */
+ if (unlikely(!lro_num_seg && strd_cnt > 1)) {
+ ++rxq->stats.idropped;
+ continue;
+ }
+ pkt = rte_pktmbuf_alloc(rxq->mp);
+ if (unlikely(pkt == NULL)) {
+ ++rxq->stats.rx_nombuf;
+ break;
+ }
+ len = (byte_cnt & MLX5_MPRQ_LEN_MASK) >> MLX5_MPRQ_LEN_SHIFT;
+ assert((int)len >= (rxq->crc_present << 2));
+ if (rxq->crc_present)
+ len -= RTE_ETHER_CRC_LEN;
+ offset = strd_idx * strd_sz + strd_shift;
+ addr = RTE_PTR_ADD(mlx5_mprq_buf_addr(buf, strd_n), offset);
+ /*
+ * Memcpy packets to the target mbuf if:
+ * - The size of packet is smaller than mprq_max_memcpy_len.
+ * - Out of buffer in the Mempool for Multi-Packet RQ.
+ */
+ if (len <= rxq->mprq_max_memcpy_len || rxq->mprq_repl == NULL) {
+ /*
+ * When memcpy'ing packet due to out-of-buffer, the
+ * packet must be smaller than the target mbuf.
+ */
+ if (unlikely(rte_pktmbuf_tailroom(pkt) < len)) {
+ rte_pktmbuf_free_seg(pkt);
+ ++rxq->stats.idropped;
+ continue;
+ }
+ rte_memcpy(rte_pktmbuf_mtod(pkt, void *), addr, len);
+ DATA_LEN(pkt) = len;
+ } else {
+ rte_iova_t buf_iova;
+ struct rte_mbuf_ext_shared_info *shinfo;
+ uint16_t buf_len = strd_cnt * strd_sz;
+ void *buf_addr;
+
+ /* Increment the refcnt of the whole chunk. */
+ rte_atomic16_add_return(&buf->refcnt, 1);
+ assert((uint16_t)rte_atomic16_read(&buf->refcnt) <=
+ strd_n + 1);
+ buf_addr = RTE_PTR_SUB(addr, headroom_sz);
+ /*
+ * MLX5 device doesn't use iova but it is necessary in a
+ * case where the Rx packet is transmitted via a
+ * different PMD.
+ */
+ buf_iova = rte_mempool_virt2iova(buf) +
+ RTE_PTR_DIFF(buf_addr, buf);
+ shinfo = &buf->shinfos[strd_idx];
+ rte_mbuf_ext_refcnt_set(shinfo, 1);
+ /*
+ * EXT_ATTACHED_MBUF will be set to pkt->ol_flags when
+ * attaching the stride to mbuf and more offload flags
+ * will be added below by calling rxq_cq_to_mbuf().
+ * Other fields will be overwritten.
+ */
+ rte_pktmbuf_attach_extbuf(pkt, buf_addr, buf_iova,
+ buf_len, shinfo);
+ /* Set mbuf head-room. */
+ pkt->data_off = headroom_sz;
+ assert(pkt->ol_flags == EXT_ATTACHED_MBUF);
+ /*
+ * Prevent potential overflow due to MTU change through
+ * kernel interface.
+ */
+ if (unlikely(rte_pktmbuf_tailroom(pkt) < len)) {
+ rte_pktmbuf_free_seg(pkt);
+ ++rxq->stats.idropped;
+ continue;
+ }
+ DATA_LEN(pkt) = len;
+ /*
+ * LRO packet may consume all the stride memory, in this
+ * case packet head-room space is not guaranteed so must
+ * to add an empty mbuf for the head-room.
+ */
+ if (!rxq->strd_headroom_en) {
+ struct rte_mbuf *headroom_mbuf =
+ rte_pktmbuf_alloc(rxq->mp);
+
+ if (unlikely(headroom_mbuf == NULL)) {
+ rte_pktmbuf_free_seg(pkt);
+ ++rxq->stats.rx_nombuf;
+ break;
+ }
+ PORT(pkt) = rxq->port_id;
+ NEXT(headroom_mbuf) = pkt;
+ pkt = headroom_mbuf;
+ NB_SEGS(pkt) = 2;
+ }
+ }
+ rxq_cq_to_mbuf(rxq, pkt, cqe, rss_hash_res);
+ if (lro_num_seg > 1) {
+ mlx5_lro_update_hdr(addr, cqe, len);
+ pkt->ol_flags |= PKT_RX_LRO;
+ pkt->tso_segsz = strd_sz;
+ }
+ PKT_LEN(pkt) = len;
+ PORT(pkt) = rxq->port_id;
+#ifdef MLX5_PMD_SOFT_COUNTERS
+ /* Increment bytes counter. */
+ rxq->stats.ibytes += PKT_LEN(pkt);
+#endif
+ /* Return packet. */
+ *(pkts++) = pkt;
+ ++i;
+ }
+ /* Update the consumer indexes. */
+ rxq->consumed_strd = consumed_strd;
+ rte_cio_wmb();
+ *rxq->cq_db = rte_cpu_to_be_32(rxq->cq_ci);
+ if (rq_ci != rxq->rq_ci) {
+ rxq->rq_ci = rq_ci;
+ rte_cio_wmb();
+ *rxq->rq_db = rte_cpu_to_be_32(rxq->rq_ci);
+ }
+#ifdef MLX5_PMD_SOFT_COUNTERS
+ /* Increment packets counter. */
+ rxq->stats.ipackets += i;
+#endif
+ return i;
+}
+
/**
* Dummy DPDK callback for TX.
*
* Number of packets successfully transmitted (<= pkts_n).
*/
uint16_t
-removed_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n)
+removed_tx_burst(void *dpdk_txq __rte_unused,
+ struct rte_mbuf **pkts __rte_unused,
+ uint16_t pkts_n __rte_unused)
{
- (void)dpdk_txq;
- (void)pkts;
- (void)pkts_n;
+ rte_mb();
return 0;
}
* Number of packets successfully received (<= pkts_n).
*/
uint16_t
-removed_rx_burst(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n)
+removed_rx_burst(void *dpdk_txq __rte_unused,
+ struct rte_mbuf **pkts __rte_unused,
+ uint16_t pkts_n __rte_unused)
{
- (void)dpdk_rxq;
- (void)pkts;
- (void)pkts_n;
+ rte_mb();
return 0;
}
* (e.g. mlx5_rxtx_vec_sse.c for x86).
*/
-uint16_t __attribute__((weak))
-mlx5_tx_burst_raw_vec(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n)
+__rte_weak uint16_t
+mlx5_rx_burst_vec(void *dpdk_txq __rte_unused,
+ struct rte_mbuf **pkts __rte_unused,
+ uint16_t pkts_n __rte_unused)
{
- (void)dpdk_txq;
- (void)pkts;
- (void)pkts_n;
return 0;
}
-uint16_t __attribute__((weak))
-mlx5_tx_burst_vec(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n)
+__rte_weak int
+mlx5_rxq_check_vec_support(struct mlx5_rxq_data *rxq __rte_unused)
{
- (void)dpdk_txq;
- (void)pkts;
- (void)pkts_n;
- return 0;
+ return -ENOTSUP;
}
-uint16_t __attribute__((weak))
-mlx5_rx_burst_vec(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n)
+__rte_weak int
+mlx5_check_vec_rx_support(struct rte_eth_dev *dev __rte_unused)
{
- (void)dpdk_rxq;
- (void)pkts;
- (void)pkts_n;
- return 0;
+ return -ENOTSUP;
}
-int __attribute__((weak))
-priv_check_raw_vec_tx_support(struct priv *priv)
+/**
+ * Free the mbufs from the linear array of pointers.
+ *
+ * @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 rte_mbuf **restrict pkts,
+ unsigned int pkts_n,
+ unsigned int olx __rte_unused)
{
- (void)priv;
- return -ENOTSUP;
+ 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.
+ */
+ assert(pkts);
+ assert(pkts_n);
+ for (;;) {
+ for (;;) {
+ /*
+ * Decrement mbuf reference counter, detach
+ * indirect and external buffers if needed.
+ */
+ mbuf = rte_pktmbuf_prefree_seg(*pkts);
+ if (likely(mbuf != NULL)) {
+ 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().
+ */
+ assert(pool);
+ assert(p_free);
+ 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;
+ }
+ }
}
-int __attribute__((weak))
-priv_check_vec_tx_support(struct priv *priv)
+/**
+ * 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 *restrict txq,
+ uint16_t tail,
+ unsigned int olx __rte_unused)
{
- (void)priv;
- return -ENOTSUP;
+ uint16_t n_elts = tail - txq->elts_tail;
+
+ assert(n_elts);
+ 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);
+ assert(part);
+ assert(part <= txq->elts_s);
+ mlx5_tx_free_mbuf(&txq->elts[txq->elts_tail & txq->elts_m],
+ part, olx);
+ txq->elts_tail += part;
+ n_elts -= part;
+ } while (n_elts);
}
-int __attribute__((weak))
-rxq_check_vec_support(struct mlx5_rxq_data *rxq)
+/**
+ * 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 *restrict txq,
+ struct rte_mbuf **restrict pkts,
+ unsigned int pkts_n,
+ unsigned int olx __rte_unused)
{
- (void)rxq;
- return -ENOTSUP;
+ unsigned int part;
+ struct rte_mbuf **elts = (struct rte_mbuf **)txq->elts;
+
+ assert(pkts);
+ assert(pkts_n);
+ part = txq->elts_s - (txq->elts_head & txq->elts_m);
+ assert(part);
+ 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.
+ *
+ * @param txq
+ * Pointer to TX queue structure.
+ * @param valid CQE pointer
+ * if not NULL update txq->wqe_pi and flush the buffers
+ * @param itail
+ * if not negative - flush the buffers till this index.
+ * @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_comp_flush(struct mlx5_txq_data *restrict txq,
+ volatile struct mlx5_cqe *last_cqe,
+ int itail,
+ unsigned int olx __rte_unused)
+{
+ uint16_t tail;
+
+ if (likely(last_cqe != NULL)) {
+ txq->wqe_pi = rte_be_to_cpu_16(last_cqe->wqe_counter);
+ tail = ((volatile struct mlx5_wqe_cseg *)
+ (txq->wqes + (txq->wqe_pi & txq->wqe_m)))->misc;
+ } else if (itail >= 0) {
+ tail = (uint16_t)itail;
+ } else {
+ return;
+ }
+ rte_compiler_barrier();
+ *txq->cq_db = rte_cpu_to_be_32(txq->cq_ci);
+ if (likely(tail != txq->elts_tail)) {
+ mlx5_tx_free_elts(txq, tail, olx);
+ assert(tail == txq->elts_tail);
+ }
}
-int __attribute__((weak))
-priv_check_vec_rx_support(struct priv *priv)
+/**
+ * Manage TX completions. This routine checks the CQ for
+ * arrived CQEs, deduces the last accomplished WQE in SQ,
+ * updates SQ producing index and frees all completed mbufs.
+ *
+ * @param txq
+ * Pointer to TX queue structure.
+ * @param olx
+ * Configured Tx offloads mask. It is fully defined at
+ * compile time and may be used for optimization.
+ *
+ * NOTE: not inlined intentionally, it makes tx_burst
+ * routine smaller, simple and faster - from experiments.
+ */
+static void
+mlx5_tx_handle_completion(struct mlx5_txq_data *restrict txq,
+ unsigned int olx __rte_unused)
{
- (void)priv;
- return -ENOTSUP;
+ unsigned int count = MLX5_TX_COMP_MAX_CQE;
+ volatile struct mlx5_cqe *last_cqe = NULL;
+ int ret;
+
+ static_assert(MLX5_CQE_STATUS_HW_OWN < 0, "Must be negative value");
+ static_assert(MLX5_CQE_STATUS_SW_OWN < 0, "Must be negative value");
+ do {
+ volatile struct mlx5_cqe *cqe;
+
+ cqe = &txq->cqes[txq->cq_ci & txq->cqe_m];
+ ret = check_cqe(cqe, txq->cqe_s, txq->cq_ci);
+ if (unlikely(ret != MLX5_CQE_STATUS_SW_OWN)) {
+ if (likely(ret != MLX5_CQE_STATUS_ERR)) {
+ /* No new CQEs in completion queue. */
+ assert(ret == MLX5_CQE_STATUS_HW_OWN);
+ break;
+ }
+ /*
+ * Some error occurred, try to restart.
+ * We have no barrier after WQE related Doorbell
+ * written, make sure all writes are completed
+ * here, before we might perform SQ reset.
+ */
+ rte_wmb();
+ ret = mlx5_tx_error_cqe_handle
+ (txq, (volatile struct mlx5_err_cqe *)cqe);
+ /*
+ * Flush buffers, update consuming index
+ * if recovery succeeded. Otherwise
+ * just try to recover later.
+ */
+ last_cqe = NULL;
+ break;
+ }
+ /* Normal transmit completion. */
+ ++txq->cq_ci;
+ last_cqe = cqe;
+#ifndef NDEBUG
+ if (txq->cq_pi)
+ --txq->cq_pi;
+#endif
+ /*
+ * We have to restrict the amount of processed CQEs
+ * in one tx_burst routine call. The CQ may be large
+ * and many CQEs may be updated by the NIC in one
+ * transaction. Buffers freeing is time consuming,
+ * multiple iterations may introduce significant
+ * latency.
+ */
+ } while (--count);
+ mlx5_tx_comp_flush(txq, last_cqe, ret, olx);
+}
+
+/**
+ * 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 multi,
+ * Routine is called from multi-segment sending loop,
+ * do not correct the elts_head according to the pkts_copy.
+ * @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 *restrict txq,
+ struct mlx5_txq_local *restrict loc,
+ bool multi,
+ unsigned int olx)
+{
+ uint16_t head = txq->elts_head;
+ unsigned int part;
+
+ part = (MLX5_TXOFF_CONFIG(INLINE) || multi) ?
+ 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;
+
+ 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 unused "immediate" field of WQE. */
+ last->cseg.misc = head;
+ /*
+ * A CQE slot must always be available. Count the
+ * issued CEQ "always" request instead of production
+ * index due to here can be CQE with errors and
+ * difference with ci may become inconsistent.
+ */
+ assert(txq->cqe_s > ++txq->cq_pi);
+ }
+}
+
+/**
+ * DPDK callback to check the status of a tx descriptor.
+ *
+ * @param tx_queue
+ * The tx queue.
+ * @param[in] offset
+ * The index of the descriptor in the ring.
+ *
+ * @return
+ * The status of the tx descriptor.
+ */
+int
+mlx5_tx_descriptor_status(void *tx_queue, uint16_t offset)
+{
+ struct mlx5_txq_data *restrict txq = tx_queue;
+ uint16_t used;
+
+ mlx5_tx_handle_completion(txq, 0);
+ used = txq->elts_head - txq->elts_tail;
+ if (offset < used)
+ return RTE_ETH_TX_DESC_FULL;
+ 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 *restrict txq,
+ struct mlx5_txq_local *restrict loc __rte_unused,
+ struct mlx5_wqe *restrict wqe,
+ unsigned int ds,
+ unsigned int opcode,
+ unsigned int olx __rte_unused)
+{
+ struct mlx5_wqe_cseg *restrict cs = &wqe->cseg;
+
+ 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 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 *restrict txq __rte_unused,
+ struct mlx5_txq_local *restrict loc,
+ struct mlx5_wqe *restrict wqe,
+ unsigned int olx)
+{
+ struct mlx5_wqe_eseg *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.
+ */
+ 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 *restrict txq __rte_unused,
+ struct mlx5_txq_local *restrict loc,
+ struct mlx5_wqe *restrict wqe,
+ unsigned int vlan,
+ unsigned int olx)
+{
+ struct mlx5_wqe_eseg *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;
+ static_assert(MLX5_ESEG_MIN_INLINE_SIZE ==
+ (sizeof(uint16_t) +
+ sizeof(rte_v128u32_t)),
+ "invalid Ethernet Segment data size");
+ static_assert(MLX5_ESEG_MIN_INLINE_SIZE ==
+ (sizeof(uint16_t) +
+ sizeof(struct rte_vlan_hdr) +
+ 2 * RTE_ETHER_ADDR_LEN),
+ "invalid Ethernet Segment data size");
+ 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. */
+ 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 *restrict txq,
+ struct mlx5_txq_local *restrict loc,
+ struct mlx5_wqe *restrict wqe,
+ unsigned int vlan,
+ unsigned int inlen,
+ unsigned int tso,
+ unsigned int olx)
+{
+ struct mlx5_wqe_eseg *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;
+ static_assert(MLX5_ESEG_MIN_INLINE_SIZE ==
+ (sizeof(uint16_t) +
+ sizeof(rte_v128u32_t)),
+ "invalid Ethernet Segment data size");
+ static_assert(MLX5_ESEG_MIN_INLINE_SIZE ==
+ (sizeof(uint16_t) +
+ sizeof(struct rte_vlan_hdr) +
+ 2 * RTE_ETHER_ADDR_LEN),
+ "invalid Ethernet Segment data size");
+ 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. */
+ 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);
+ assert(inlen >= MLX5_ESEG_MIN_INLINE_SIZE);
+ assert(pdst < (uint8_t *)txq->wqes_end);
+ inlen -= MLX5_ESEG_MIN_INLINE_SIZE;
+ if (!inlen) {
+ 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 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_mseg_memcpy(uint8_t *pdst,
+ struct mlx5_txq_local *restrict loc,
+ unsigned int len,
+ unsigned int olx __rte_unused)
+{
+ struct rte_mbuf *mbuf;
+ unsigned int part, dlen;
+ uint8_t *psrc;
+
+ assert(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;
+ assert(loc->mbuf_nseg > 1);
+ assert(loc->mbuf);
+ --loc->mbuf_nseg;
+ 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);
+ 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;
+ assert(loc->mbuf_nseg >= 1);
+ --loc->mbuf_nseg;
+ }
+ return;
+ }
+ 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 *restrict txq,
+ struct mlx5_txq_local *restrict loc,
+ struct mlx5_wqe *restrict wqe,
+ unsigned int vlan,
+ unsigned int inlen,
+ unsigned int tso,
+ unsigned int olx)
+{
+ struct mlx5_wqe_eseg *restrict es = &wqe->eseg;
+ uint32_t csum;
+ uint8_t *pdst;
+ unsigned int part;
+
+ /*
+ * 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;
+ static_assert(MLX5_ESEG_MIN_INLINE_SIZE ==
+ (sizeof(uint16_t) +
+ sizeof(rte_v128u32_t)),
+ "invalid Ethernet Segment data size");
+ static_assert(MLX5_ESEG_MIN_INLINE_SIZE ==
+ (sizeof(uint16_t) +
+ sizeof(struct rte_vlan_hdr) +
+ 2 * RTE_ETHER_ADDR_LEN),
+ "invalid Ethernet Segment data size");
+ assert(inlen >= MLX5_ESEG_MIN_INLINE_SIZE);
+ es->inline_hdr_sz = rte_cpu_to_be_16(inlen);
+ 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, 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);
+ inlen -= 2 * RTE_ETHER_ADDR_LEN + sizeof(struct rte_vlan_hdr);
+ }
+ 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);
+ assert(part);
+ do {
+ mlx5_tx_mseg_memcpy(pdst, loc, part, olx);
+ inlen -= part;
+ if (likely(!inlen)) {
+ pdst += part;
+ pdst = RTE_PTR_ALIGN(pdst, MLX5_WSEG_SIZE);
+ return (struct mlx5_wqe_dseg *)pdst;
+ }
+ pdst = (uint8_t *)txq->wqes;
+ part = inlen;
+ } 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 *restrict txq,
+ struct mlx5_txq_local *restrict loc,
+ struct mlx5_wqe_dseg *restrict dseg,
+ uint8_t *buf,
+ unsigned int len,
+ unsigned int olx __rte_unused)
+
+{
+ 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 *restrict txq,
+ struct mlx5_txq_local *restrict loc,
+ struct mlx5_wqe_dseg *restrict dseg,
+ uint8_t *buf,
+ unsigned int len,
+ unsigned int olx __rte_unused)
+
+{
+ uintptr_t dst, src;
+
+ 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
+ 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 *restrict txq,
+ struct mlx5_txq_local *restrict loc __rte_unused,
+ struct mlx5_wqe_dseg *restrict dseg,
+ uint8_t *buf,
+ unsigned int len,
+ unsigned int olx __rte_unused)
+{
+ unsigned int part;
+ uint8_t *pdst;
+
+ dseg->bcount = rte_cpu_to_be_32(len | MLX5_ETH_WQE_DATA_INLINE);
+ pdst = &dseg->inline_data[0];
+ /*
+ * 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;
+ 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 *restrict txq,
+ struct mlx5_txq_local *restrict loc __rte_unused,
+ struct mlx5_wqe_dseg *restrict dseg,
+ uint8_t *buf,
+ unsigned int len,
+ unsigned int olx __rte_unused)
+
+{
+ unsigned int part;
+ uint8_t *pdst;
+
+ assert(len > MLX5_ESEG_MIN_INLINE_SIZE);
+ static_assert(MLX5_DSEG_MIN_INLINE_SIZE ==
+ (2 * RTE_ETHER_ADDR_LEN),
+ "invalid Data Segment data size");
+ dseg->bcount = rte_cpu_to_be_32((len + sizeof(struct rte_vlan_hdr)) |
+ MLX5_ETH_WQE_DATA_INLINE);
+ pdst = &dseg->inline_data[0];
+ 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. */
+ 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;
+ 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 *restrict txq,
+ struct mlx5_txq_local *restrict loc,
+ struct mlx5_wqe *restrict wqe,
+ unsigned int vlan,
+ unsigned int inlen,
+ unsigned int tso,
+ unsigned int olx __rte_unused)
+{
+ struct mlx5_wqe_dseg *restrict dseg;
+ unsigned int ds;
+
+ 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.
+ */
+ assert(loc->mbuf_off < rte_pktmbuf_data_len(loc->mbuf));
+ 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. */
+ 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);
+ 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;
+}
+
+/**
+ * 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 *restrict txq,
+ struct mlx5_txq_local *restrict loc,
+ unsigned int olx)
+{
+ struct mlx5_wqe *restrict wqe;
+ unsigned int ds, dlen, inlen, ntcp, vlan = 0;
+
+ /*
+ * 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;
+ 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;
+ /* Request CQE generation if limits are reached. */
+ mlx5_tx_request_completion(txq, loc, true, olx);
+ 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 *restrict txq,
+ struct mlx5_txq_local *restrict loc,
+ unsigned int olx)
+{
+ struct mlx5_wqe_dseg *restrict dseg;
+ struct mlx5_wqe *restrict wqe;
+ unsigned int ds, nseg;
+
+ assert(NB_SEGS(loc->mbuf) > 1);
+ /*
+ * 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;
+ /* Request CQE generation if limits are reached. */
+ mlx5_tx_request_completion(txq, loc, true, olx);
+ 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 *restrict txq,
+ struct mlx5_txq_local *restrict loc,
+ unsigned int olx)
+{
+ struct mlx5_wqe *restrict wqe;
+ unsigned int ds, inlen, dlen, vlan = 0;
+
+ assert(MLX5_TXOFF_CONFIG(INLINE));
+ assert(NB_SEGS(loc->mbuf) > 1);
+ /*
+ * 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;
+ assert(txq->inlen_send >= MLX5_ESEG_MIN_INLINE_SIZE);
+ if (inlen > txq->inlen_send) {
+ 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) {
+ assert(txq->inlen_mode >= MLX5_ESEG_MIN_INLINE_SIZE);
+ assert(txq->inlen_mode <= txq->inlen_send);
+ inlen = txq->inlen_mode;
+ } else {
+ if (!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);
+ 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. */
+ 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.
+ */
+ 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;
+ /* Request CQE generation if limits are reached. */
+ mlx5_tx_request_completion(txq, loc, true, olx);
+ 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 *restrict txq,
+ struct rte_mbuf **restrict pkts,
+ unsigned int pkts_n,
+ struct mlx5_txq_local *restrict loc,
+ unsigned int olx)
+{
+ assert(loc->elts_free && loc->wqe_free);
+ assert(pkts_n > loc->pkts_sent);
+ pkts += loc->pkts_sent + 1;
+ pkts_n -= loc->pkts_sent;
+ for (;;) {
+ enum mlx5_txcmp_code ret;
+
+ 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;
+ }
+ 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 *restrict txq,
+ struct rte_mbuf **restrict pkts,
+ unsigned int pkts_n,
+ struct mlx5_txq_local *restrict loc,
+ unsigned int olx)
+{
+ assert(loc->elts_free && loc->wqe_free);
+ assert(pkts_n > loc->pkts_sent);
+ pkts += loc->pkts_sent + 1;
+ pkts_n -= loc->pkts_sent;
+ for (;;) {
+ struct mlx5_wqe_dseg *restrict dseg;
+ struct mlx5_wqe *restrict wqe;
+ unsigned int ds, dlen, hlen, ntcp, vlan = 0;
+ uint8_t *dptr;
+
+ assert(NB_SEGS(loc->mbuf) == 1);
+ 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;
+ /* Request CQE generation if limits are reached. */
+ mlx5_tx_request_completion(txq, loc, false, olx);
+ 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. */
+ }
+ 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 *restrict txq,
+ struct mlx5_txq_local *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.
+ *
+ * @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 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 *restrict txq __rte_unused,
+ struct mlx5_wqe_eseg *restrict es,
+ struct mlx5_txq_local *restrict loc,
+ 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;
+ /* There must be no VLAN packets in eMPW loop. */
+ if (MLX5_TXOFF_CONFIG(VLAN))
+ assert(!(loc->mbuf->ol_flags & PKT_TX_VLAN_PKT));
+ 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 *restrict txq,
+ struct mlx5_txq_local *restrict loc,
+ unsigned int ds,
+ unsigned int slen,
+ unsigned int olx)
+{
+ 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;
+ /* Request CQE generation if limits are reached. */
+ mlx5_tx_request_completion(txq, loc, false, olx);
+}
+
+/*
+ * 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 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 *restrict txq,
+ struct mlx5_txq_local *restrict loc,
+ unsigned int len,
+ unsigned int slen,
+ unsigned int olx __rte_unused)
+{
+ assert(MLX5_TXOFF_CONFIG(INLINE));
+ assert((len % MLX5_WSEG_SIZE) == 0);
+#ifdef MLX5_PMD_SOFT_COUNTERS
+ /* Update sent data bytes counter. */
+ txq->stats.obytes += slen;
+#else
+ (void)slen;
+#endif
+ len = len / MLX5_WSEG_SIZE + 2;
+ loc->wqe_last->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;
+ /* Request CQE generation if limits are reached. */
+ mlx5_tx_request_completion(txq, loc, false, olx);
+}
+
+/**
+ * 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 *restrict txq,
+ struct rte_mbuf **restrict pkts,
+ unsigned int pkts_n,
+ struct mlx5_txq_local *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.
+ */
+ assert(!MLX5_TXOFF_CONFIG(INLINE));
+ assert(MLX5_TXOFF_CONFIG(EMPW));
+ assert(loc->elts_free && loc->wqe_free);
+ assert(pkts_n > loc->pkts_sent);
+ static_assert(MLX5_EMPW_MIN_PACKETS >= 2, "invalid min size");
+ pkts += loc->pkts_sent + 1;
+ pkts_n -= loc->pkts_sent;
+ for (;;) {
+ struct mlx5_wqe_dseg *restrict dseg;
+ struct mlx5_wqe_eseg *restrict eseg;
+ enum mlx5_txcmp_code ret;
+ unsigned int part, loop;
+ unsigned int slen = 0;
+
+next_empw:
+ part = RTE_MIN(pkts_n, 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;
+ 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;
+ }
+ 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) {
+ 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
+ */
+ if (!mlx5_tx_match_empw(txq, eseg, loc, olx)) {
+ 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. */
+ assert(!loop);
+ 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;
+ /* Request CQE generation if limits are reached. */
+ mlx5_tx_request_completion(txq, loc, false, olx);
+ 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. */
+ }
+ 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 *restrict txq,
+ struct rte_mbuf **restrict pkts,
+ unsigned int pkts_n,
+ struct mlx5_txq_local *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.
+ */
+ assert(MLX5_TXOFF_CONFIG(INLINE));
+ assert(MLX5_TXOFF_CONFIG(EMPW));
+ assert(loc->elts_free && loc->wqe_free);
+ assert(pkts_n > loc->pkts_sent);
+ static_assert(MLX5_EMPW_MIN_PACKETS >= 2, "invalid min size");
+ pkts += loc->pkts_sent + 1;
+ pkts_n -= loc->pkts_sent;
+ for (;;) {
+ struct mlx5_wqe_dseg *restrict dseg;
+ struct mlx5_wqe_eseg *restrict eseg;
+ enum mlx5_txcmp_code ret;
+ unsigned int room, part, nlim;
+ unsigned int slen = 0;
+
+ /*
+ * Limits the amount of packets in one WQE
+ * to improve CQE latency generation.
+ */
+ nlim = RTE_MIN(pkts_n, 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);
+ loc->wqe_last = 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, loc->wqe_last, 0,
+ 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];
+ room = RTE_MIN(MLX5_WQE_SIZE_MAX / MLX5_WQE_SIZE,
+ loc->wqe_free) * MLX5_WQE_SIZE -
+ MLX5_WQE_CSEG_SIZE -
+ MLX5_WQE_ESEG_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;
+
+ assert(room >= MLX5_WQE_DSEG_SIZE);
+ assert((room % MLX5_WQE_DSEG_SIZE) == 0);
+ 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, olx);
+ return MLX5_TXCMP_CODE_ERROR;
+ }
+ /* Inline or not inline - that's the Question. */
+ if (dlen > txq->inlen_empw)
+ goto pointer_empw;
+ /* Inline entire packet, optional VLAN insertion. */
+ tlen = sizeof(dseg->bcount) + dlen;
+ 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.
+ */
+ 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);
+ }
+ tlen = RTE_ALIGN(tlen, MLX5_WSEG_SIZE);
+ assert(room >= tlen);
+ room -= tlen;
+ /*
+ * Packet data are completely inlined,
+ * free the packet immediately.
+ */
+ rte_pktmbuf_free_seg(loc->mbuf);
+ goto next_mbuf;
+pointer_empw:
+ /*
+ * Not inlinable VLAN packets are
+ * proceeded outside of this routine.
+ */
+ assert(room >= MLX5_WQE_DSEG_SIZE);
+ if (MLX5_TXOFF_CONFIG(VLAN))
+ 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;
+ 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++;
+ loc->elts_free--;
+ 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, 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, olx);
+ if (unlikely(!loc->elts_free ||
+ !loc->wqe_free))
+ return MLX5_TXCMP_CODE_EXIT;
+ return MLX5_TXCMP_CODE_MULTI;
+ }
+ if (ret == MLX5_TXCMP_CODE_TSO) {
+ part -= room;
+ mlx5_tx_idone_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 -= room;
+ mlx5_tx_idone_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) {
+ assert(false);
+ part -= room;
+ mlx5_tx_idone_empw(txq, loc, part, slen, 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
+ */
+ if (!mlx5_tx_match_empw(txq, eseg, loc, 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.
+ */
+ assert(pkts_n);
+ part -= room;
+ if (unlikely(!part))
+ return MLX5_TXCMP_CODE_EXIT;
+ mlx5_tx_idone_empw(txq, loc, part, slen, olx);
+ if (unlikely(!loc->elts_free ||
+ !loc->wqe_free))
+ return MLX5_TXCMP_CODE_EXIT;
+ /* Continue the loop with new eMPW session. */
+ }
+ 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 *restrict txq,
+ struct rte_mbuf **restrict pkts,
+ unsigned int pkts_n,
+ struct mlx5_txq_local *restrict loc,
+ unsigned int olx)
+{
+ /*
+ * Subroutine is the part of mlx5_tx_burst_single()
+ * and sends single-segment packet with SEND opcode.
+ */
+ assert(loc->elts_free && loc->wqe_free);
+ assert(pkts_n > loc->pkts_sent);
+ pkts += loc->pkts_sent + 1;
+ pkts_n -= loc->pkts_sent;
+ for (;;) {
+ struct mlx5_wqe *restrict wqe;
+ enum mlx5_txcmp_code ret;
+
+ assert(NB_SEGS(loc->mbuf) == 1);
+ 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;
+ static_assert((sizeof(struct rte_vlan_hdr) +
+ sizeof(struct rte_ether_hdr)) ==
+ MLX5_ESEG_MIN_INLINE_SIZE,
+ "invalid min inline data size");
+ }
+ /*
+ * 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.
+ */
+ 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;
+ /*
+ * 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) &&
+ 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 *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.
+ */
+ assert(txq->inlen_send >= txq->inlen_mode);
+ assert(inlen > txq->inlen_mode);
+ 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.*/
+ 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.
+ */
+ 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.
+ */
+ 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.*/
+ 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
+ */
+ 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.
+ */
+ 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;
+ /* Request CQE generation if limits are reached. */
+ mlx5_tx_request_completion(txq, loc, false, olx);
+ 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;
+ }
+ assert(false);
+}
+
+static __rte_always_inline enum mlx5_txcmp_code
+mlx5_tx_burst_single(struct mlx5_txq_data *restrict txq,
+ struct rte_mbuf **restrict pkts,
+ unsigned int pkts_n,
+ struct mlx5_txq_local *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;
+ 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. */
+ assert(loc->elts_free && loc->wqe_free);
+ordinary_send:
+ ret = mlx5_tx_burst_single_send(txq, pkts, pkts_n, loc, olx);
+ assert(ret != MLX5_TXCMP_CODE_SINGLE);
+ if (ret != MLX5_TXCMP_CODE_EMPW)
+ return ret;
+ /* The resources to send one packet should remain. */
+ 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 *restrict txq,
+ struct rte_mbuf **restrict pkts,
+ uint16_t pkts_n,
+ unsigned int olx)
+{
+ struct mlx5_txq_local loc;
+ enum mlx5_txcmp_code ret;
+ unsigned int part;
+
+ assert(txq->elts_s >= (uint16_t)(txq->elts_head - txq->elts_tail));
+ assert(txq->wqe_s >= (uint16_t)(txq->wqe_ci - txq->wqe_pi));
+ if (unlikely(!pkts_n))
+ return 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 upto
+ * 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.
+ */
+ 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);
+ 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:
+ 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;
+ }
+ 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. */
+ 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:
+ assert(NB_SEGS(loc.mbuf) == 1);
+ 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. */
+ 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:
+ 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. */
+ 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)
+ */
+ 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;
+ /*
+ * 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.
+ */
+ mlx5_tx_dbrec_cond_wmb(txq, loc.wqe_last, 0);
+ /* 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;
+ }
+ assert(txq->elts_s >= (uint16_t)(txq->elts_head - txq->elts_tail));
+ 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
+ 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)
+
+MLX5_TXOFF_DECL(none_empw,
+ MLX5_TXOFF_CONFIG_NONE | MLX5_TXOFF_CONFIG_EMPW)
+
+MLX5_TXOFF_DECL(md_empw,
+ MLX5_TXOFF_CONFIG_METADATA | MLX5_TXOFF_CONFIG_EMPW)
+
+MLX5_TXOFF_DECL(mt_empw,
+ MLX5_TXOFF_CONFIG_MULTI | MLX5_TXOFF_CONFIG_TSO |
+ MLX5_TXOFF_CONFIG_METADATA | MLX5_TXOFF_CONFIG_EMPW)
+
+MLX5_TXOFF_DECL(mtsc_empw,
+ MLX5_TXOFF_CONFIG_MULTI | MLX5_TXOFF_CONFIG_TSO |
+ MLX5_TXOFF_CONFIG_SWP | MLX5_TXOFF_CONFIG_CSUM |
+ MLX5_TXOFF_CONFIG_METADATA | MLX5_TXOFF_CONFIG_EMPW)
+
+MLX5_TXOFF_DECL(mti_empw,
+ MLX5_TXOFF_CONFIG_MULTI | MLX5_TXOFF_CONFIG_TSO |
+ MLX5_TXOFF_CONFIG_INLINE |
+ MLX5_TXOFF_CONFIG_METADATA | MLX5_TXOFF_CONFIG_EMPW)
+
+MLX5_TXOFF_DECL(mtv_empw,
+ MLX5_TXOFF_CONFIG_MULTI | MLX5_TXOFF_CONFIG_TSO |
+ MLX5_TXOFF_CONFIG_VLAN |
+ MLX5_TXOFF_CONFIG_METADATA | MLX5_TXOFF_CONFIG_EMPW)
+
+MLX5_TXOFF_DECL(mtiv_empw,
+ MLX5_TXOFF_CONFIG_MULTI | MLX5_TXOFF_CONFIG_TSO |
+ MLX5_TXOFF_CONFIG_INLINE | MLX5_TXOFF_CONFIG_VLAN |
+ MLX5_TXOFF_CONFIG_METADATA | MLX5_TXOFF_CONFIG_EMPW)
+
+MLX5_TXOFF_DECL(sc_empw,
+ MLX5_TXOFF_CONFIG_SWP | MLX5_TXOFF_CONFIG_CSUM |
+ MLX5_TXOFF_CONFIG_METADATA | MLX5_TXOFF_CONFIG_EMPW)
+
+MLX5_TXOFF_DECL(sci_empw,
+ MLX5_TXOFF_CONFIG_SWP | MLX5_TXOFF_CONFIG_CSUM |
+ MLX5_TXOFF_CONFIG_INLINE |
+ MLX5_TXOFF_CONFIG_METADATA | MLX5_TXOFF_CONFIG_EMPW)
+
+MLX5_TXOFF_DECL(scv_empw,
+ MLX5_TXOFF_CONFIG_SWP | MLX5_TXOFF_CONFIG_CSUM |
+ MLX5_TXOFF_CONFIG_VLAN |
+ MLX5_TXOFF_CONFIG_METADATA | MLX5_TXOFF_CONFIG_EMPW)
+
+MLX5_TXOFF_DECL(sciv_empw,
+ MLX5_TXOFF_CONFIG_SWP | MLX5_TXOFF_CONFIG_CSUM |
+ MLX5_TXOFF_CONFIG_INLINE | MLX5_TXOFF_CONFIG_VLAN |
+ MLX5_TXOFF_CONFIG_METADATA | MLX5_TXOFF_CONFIG_EMPW)
+
+MLX5_TXOFF_DECL(i_empw,
+ MLX5_TXOFF_CONFIG_INLINE |
+ MLX5_TXOFF_CONFIG_METADATA | MLX5_TXOFF_CONFIG_EMPW)
+
+MLX5_TXOFF_DECL(v_empw,
+ MLX5_TXOFF_CONFIG_VLAN |
+ MLX5_TXOFF_CONFIG_METADATA | MLX5_TXOFF_CONFIG_EMPW)
+
+MLX5_TXOFF_DECL(iv_empw,
+ MLX5_TXOFF_CONFIG_INLINE | MLX5_TXOFF_CONFIG_VLAN |
+ MLX5_TXOFF_CONFIG_METADATA | MLX5_TXOFF_CONFIG_EMPW)
+
+/* Generate routines without Enhanced Multi-Packet Write support. */
+MLX5_TXOFF_DECL(full,
+ MLX5_TXOFF_CONFIG_FULL)
+
+MLX5_TXOFF_DECL(none,
+ MLX5_TXOFF_CONFIG_NONE)
+
+MLX5_TXOFF_DECL(md,
+ MLX5_TXOFF_CONFIG_METADATA)
+
+MLX5_TXOFF_DECL(mt,
+ MLX5_TXOFF_CONFIG_MULTI | MLX5_TXOFF_CONFIG_TSO |
+ MLX5_TXOFF_CONFIG_METADATA)
+
+MLX5_TXOFF_DECL(mtsc,
+ MLX5_TXOFF_CONFIG_MULTI | MLX5_TXOFF_CONFIG_TSO |
+ MLX5_TXOFF_CONFIG_SWP | MLX5_TXOFF_CONFIG_CSUM |
+ MLX5_TXOFF_CONFIG_METADATA)
+
+MLX5_TXOFF_DECL(mti,
+ MLX5_TXOFF_CONFIG_MULTI | MLX5_TXOFF_CONFIG_TSO |
+ MLX5_TXOFF_CONFIG_INLINE |
+ MLX5_TXOFF_CONFIG_METADATA)
+
+
+MLX5_TXOFF_DECL(mtv,
+ MLX5_TXOFF_CONFIG_MULTI | MLX5_TXOFF_CONFIG_TSO |
+ MLX5_TXOFF_CONFIG_VLAN |
+ MLX5_TXOFF_CONFIG_METADATA)
+
+
+MLX5_TXOFF_DECL(mtiv,
+ MLX5_TXOFF_CONFIG_MULTI | MLX5_TXOFF_CONFIG_TSO |
+ MLX5_TXOFF_CONFIG_INLINE | MLX5_TXOFF_CONFIG_VLAN |
+ MLX5_TXOFF_CONFIG_METADATA)
+
+MLX5_TXOFF_DECL(sc,
+ MLX5_TXOFF_CONFIG_SWP | MLX5_TXOFF_CONFIG_CSUM |
+ MLX5_TXOFF_CONFIG_METADATA)
+
+MLX5_TXOFF_DECL(sci,
+ MLX5_TXOFF_CONFIG_SWP | MLX5_TXOFF_CONFIG_CSUM |
+ MLX5_TXOFF_CONFIG_INLINE |
+ MLX5_TXOFF_CONFIG_METADATA)
+
+
+MLX5_TXOFF_DECL(scv,
+ MLX5_TXOFF_CONFIG_SWP | MLX5_TXOFF_CONFIG_CSUM |
+ MLX5_TXOFF_CONFIG_VLAN |
+ MLX5_TXOFF_CONFIG_METADATA)
+
+
+MLX5_TXOFF_DECL(sciv,
+ MLX5_TXOFF_CONFIG_SWP | MLX5_TXOFF_CONFIG_CSUM |
+ MLX5_TXOFF_CONFIG_INLINE | MLX5_TXOFF_CONFIG_VLAN |
+ MLX5_TXOFF_CONFIG_METADATA)
+
+MLX5_TXOFF_DECL(i,
+ MLX5_TXOFF_CONFIG_INLINE |
+ MLX5_TXOFF_CONFIG_METADATA)
+
+MLX5_TXOFF_DECL(v,
+ MLX5_TXOFF_CONFIG_VLAN |
+ MLX5_TXOFF_CONFIG_METADATA)
+
+MLX5_TXOFF_DECL(iv,
+ MLX5_TXOFF_CONFIG_INLINE | MLX5_TXOFF_CONFIG_VLAN |
+ MLX5_TXOFF_CONFIG_METADATA)
+
+/*
+ * Array of declared and compiled Tx burst function and corresponding
+ * supported offloads set. The array is used to select the Tx burst
+ * function for specified offloads set at Tx queue configuration time.
+ */
+const struct {
+ eth_tx_burst_t func;
+ unsigned int olx;
+} txoff_func[] = {
+MLX5_TXOFF_INFO(full_empw,
+ 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 | MLX5_TXOFF_CONFIG_EMPW)
+
+MLX5_TXOFF_INFO(none_empw,
+ MLX5_TXOFF_CONFIG_NONE | MLX5_TXOFF_CONFIG_EMPW)
+
+MLX5_TXOFF_INFO(md_empw,
+ MLX5_TXOFF_CONFIG_METADATA | MLX5_TXOFF_CONFIG_EMPW)
+
+MLX5_TXOFF_INFO(mt_empw,
+ MLX5_TXOFF_CONFIG_MULTI | MLX5_TXOFF_CONFIG_TSO |
+ MLX5_TXOFF_CONFIG_METADATA | MLX5_TXOFF_CONFIG_EMPW)
+
+MLX5_TXOFF_INFO(mtsc_empw,
+ MLX5_TXOFF_CONFIG_MULTI | MLX5_TXOFF_CONFIG_TSO |
+ MLX5_TXOFF_CONFIG_SWP | MLX5_TXOFF_CONFIG_CSUM |
+ MLX5_TXOFF_CONFIG_METADATA | MLX5_TXOFF_CONFIG_EMPW)
+
+MLX5_TXOFF_INFO(mti_empw,
+ MLX5_TXOFF_CONFIG_MULTI | MLX5_TXOFF_CONFIG_TSO |
+ MLX5_TXOFF_CONFIG_INLINE |
+ MLX5_TXOFF_CONFIG_METADATA | MLX5_TXOFF_CONFIG_EMPW)
+
+MLX5_TXOFF_INFO(mtv_empw,
+ MLX5_TXOFF_CONFIG_MULTI | MLX5_TXOFF_CONFIG_TSO |
+ MLX5_TXOFF_CONFIG_VLAN |
+ MLX5_TXOFF_CONFIG_METADATA | MLX5_TXOFF_CONFIG_EMPW)
+
+MLX5_TXOFF_INFO(mtiv_empw,
+ MLX5_TXOFF_CONFIG_MULTI | MLX5_TXOFF_CONFIG_TSO |
+ MLX5_TXOFF_CONFIG_INLINE | MLX5_TXOFF_CONFIG_VLAN |
+ MLX5_TXOFF_CONFIG_METADATA | MLX5_TXOFF_CONFIG_EMPW)
+
+MLX5_TXOFF_INFO(sc_empw,
+ MLX5_TXOFF_CONFIG_SWP | MLX5_TXOFF_CONFIG_CSUM |
+ MLX5_TXOFF_CONFIG_METADATA | MLX5_TXOFF_CONFIG_EMPW)
+
+MLX5_TXOFF_INFO(sci_empw,
+ MLX5_TXOFF_CONFIG_SWP | MLX5_TXOFF_CONFIG_CSUM |
+ MLX5_TXOFF_CONFIG_INLINE |
+ MLX5_TXOFF_CONFIG_METADATA | MLX5_TXOFF_CONFIG_EMPW)
+
+MLX5_TXOFF_INFO(scv_empw,
+ MLX5_TXOFF_CONFIG_SWP | MLX5_TXOFF_CONFIG_CSUM |
+ MLX5_TXOFF_CONFIG_VLAN |
+ MLX5_TXOFF_CONFIG_METADATA | MLX5_TXOFF_CONFIG_EMPW)
+
+MLX5_TXOFF_INFO(sciv_empw,
+ MLX5_TXOFF_CONFIG_SWP | MLX5_TXOFF_CONFIG_CSUM |
+ MLX5_TXOFF_CONFIG_INLINE | MLX5_TXOFF_CONFIG_VLAN |
+ MLX5_TXOFF_CONFIG_METADATA | MLX5_TXOFF_CONFIG_EMPW)
+
+MLX5_TXOFF_INFO(i_empw,
+ MLX5_TXOFF_CONFIG_INLINE |
+ MLX5_TXOFF_CONFIG_METADATA | MLX5_TXOFF_CONFIG_EMPW)
+
+MLX5_TXOFF_INFO(v_empw,
+ MLX5_TXOFF_CONFIG_VLAN |
+ MLX5_TXOFF_CONFIG_METADATA | MLX5_TXOFF_CONFIG_EMPW)
+
+MLX5_TXOFF_INFO(iv_empw,
+ MLX5_TXOFF_CONFIG_INLINE | MLX5_TXOFF_CONFIG_VLAN |
+ MLX5_TXOFF_CONFIG_METADATA | MLX5_TXOFF_CONFIG_EMPW)
+
+MLX5_TXOFF_INFO(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)
+
+MLX5_TXOFF_INFO(none,
+ MLX5_TXOFF_CONFIG_NONE)
+
+MLX5_TXOFF_INFO(md,
+ MLX5_TXOFF_CONFIG_METADATA)
+
+MLX5_TXOFF_INFO(mt,
+ MLX5_TXOFF_CONFIG_MULTI | MLX5_TXOFF_CONFIG_TSO |
+ MLX5_TXOFF_CONFIG_METADATA)
+
+MLX5_TXOFF_INFO(mtsc,
+ MLX5_TXOFF_CONFIG_MULTI | MLX5_TXOFF_CONFIG_TSO |
+ MLX5_TXOFF_CONFIG_SWP | MLX5_TXOFF_CONFIG_CSUM |
+ MLX5_TXOFF_CONFIG_METADATA)
+
+MLX5_TXOFF_INFO(mti,
+ MLX5_TXOFF_CONFIG_MULTI | MLX5_TXOFF_CONFIG_TSO |
+ MLX5_TXOFF_CONFIG_INLINE |
+ MLX5_TXOFF_CONFIG_METADATA)
+
+
+MLX5_TXOFF_INFO(mtv,
+ MLX5_TXOFF_CONFIG_MULTI | MLX5_TXOFF_CONFIG_TSO |
+ MLX5_TXOFF_CONFIG_VLAN |
+ MLX5_TXOFF_CONFIG_METADATA)
+
+MLX5_TXOFF_INFO(mtiv,
+ MLX5_TXOFF_CONFIG_MULTI | MLX5_TXOFF_CONFIG_TSO |
+ MLX5_TXOFF_CONFIG_INLINE | MLX5_TXOFF_CONFIG_VLAN |
+ MLX5_TXOFF_CONFIG_METADATA)
+
+MLX5_TXOFF_INFO(sc,
+ MLX5_TXOFF_CONFIG_SWP | MLX5_TXOFF_CONFIG_CSUM |
+ MLX5_TXOFF_CONFIG_METADATA)
+
+MLX5_TXOFF_INFO(sci,
+ MLX5_TXOFF_CONFIG_SWP | MLX5_TXOFF_CONFIG_CSUM |
+ MLX5_TXOFF_CONFIG_INLINE |
+ MLX5_TXOFF_CONFIG_METADATA)
+
+MLX5_TXOFF_INFO(scv,
+ MLX5_TXOFF_CONFIG_SWP | MLX5_TXOFF_CONFIG_CSUM |
+ MLX5_TXOFF_CONFIG_VLAN |
+ MLX5_TXOFF_CONFIG_METADATA)
+
+MLX5_TXOFF_INFO(sciv,
+ MLX5_TXOFF_CONFIG_SWP | MLX5_TXOFF_CONFIG_CSUM |
+ MLX5_TXOFF_CONFIG_INLINE | MLX5_TXOFF_CONFIG_VLAN |
+ MLX5_TXOFF_CONFIG_METADATA)
+
+MLX5_TXOFF_INFO(i,
+ MLX5_TXOFF_CONFIG_INLINE |
+ MLX5_TXOFF_CONFIG_METADATA)
+
+MLX5_TXOFF_INFO(v,
+ MLX5_TXOFF_CONFIG_VLAN |
+ MLX5_TXOFF_CONFIG_METADATA)
+
+MLX5_TXOFF_INFO(iv,
+ MLX5_TXOFF_CONFIG_INLINE | MLX5_TXOFF_CONFIG_VLAN |
+ MLX5_TXOFF_CONFIG_METADATA)
+};
+
+/**
+ * Configure the Tx function to use. The routine checks configured
+ * Tx offloads for the device and selects appropriate Tx burst
+ * routine. There are multiple Tx burst routines compiled from
+ * the same template in the most optimal way for the dedicated
+ * Tx offloads set.
+ *
+ * @param dev
+ * Pointer to private data structure.
+ *
+ * @return
+ * Pointer to selected Tx burst function.
+ */
+eth_tx_burst_t
+mlx5_select_tx_function(struct rte_eth_dev *dev)
+{
+ struct mlx5_priv *priv = dev->data->dev_private;
+ struct mlx5_dev_config *config = &priv->config;
+ uint64_t tx_offloads = dev->data->dev_conf.txmode.offloads;
+ unsigned int diff = 0, olx = 0, i, m;
+
+ static_assert(MLX5_WQE_SIZE_MAX / MLX5_WSEG_SIZE <=
+ MLX5_DSEG_MAX, "invalid WQE max size");
+ static_assert(MLX5_WQE_CSEG_SIZE == MLX5_WSEG_SIZE,
+ "invalid WQE Control Segment size");
+ static_assert(MLX5_WQE_ESEG_SIZE == MLX5_WSEG_SIZE,
+ "invalid WQE Ethernet Segment size");
+ static_assert(MLX5_WQE_DSEG_SIZE == MLX5_WSEG_SIZE,
+ "invalid WQE Data Segment size");
+ static_assert(MLX5_WQE_SIZE == 4 * MLX5_WSEG_SIZE,
+ "invalid WQE size");
+ assert(priv);
+ if (tx_offloads & DEV_TX_OFFLOAD_MULTI_SEGS) {
+ /* We should support Multi-Segment Packets. */
+ olx |= MLX5_TXOFF_CONFIG_MULTI;
+ }
+ if (tx_offloads & (DEV_TX_OFFLOAD_TCP_TSO |
+ DEV_TX_OFFLOAD_VXLAN_TNL_TSO |
+ DEV_TX_OFFLOAD_GRE_TNL_TSO |
+ DEV_TX_OFFLOAD_IP_TNL_TSO |
+ DEV_TX_OFFLOAD_UDP_TNL_TSO)) {
+ /* We should support TCP Send Offload. */
+ olx |= MLX5_TXOFF_CONFIG_TSO;
+ }
+ if (tx_offloads & (DEV_TX_OFFLOAD_IP_TNL_TSO |
+ DEV_TX_OFFLOAD_UDP_TNL_TSO |
+ DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM)) {
+ /* We should support Software Parser for Tunnels. */
+ olx |= MLX5_TXOFF_CONFIG_SWP;
+ }
+ if (tx_offloads & (DEV_TX_OFFLOAD_IPV4_CKSUM |
+ DEV_TX_OFFLOAD_UDP_CKSUM |
+ DEV_TX_OFFLOAD_TCP_CKSUM |
+ DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM)) {
+ /* We should support IP/TCP/UDP Checksums. */
+ olx |= MLX5_TXOFF_CONFIG_CSUM;
+ }
+ if (tx_offloads & DEV_TX_OFFLOAD_VLAN_INSERT) {
+ /* We should support VLAN insertion. */
+ olx |= MLX5_TXOFF_CONFIG_VLAN;
+ }
+ if (priv->txqs_n && (*priv->txqs)[0]) {
+ struct mlx5_txq_data *txd = (*priv->txqs)[0];
+
+ if (txd->inlen_send) {
+ /*
+ * Check the data inline requirements. Data inline
+ * is enabled on per device basis, we can check
+ * the first Tx queue only.
+ *
+ * If device does not support VLAN insertion in WQE
+ * and some queues are requested to perform VLAN
+ * insertion offload than inline must be enabled.
+ */
+ olx |= MLX5_TXOFF_CONFIG_INLINE;
+ }
+ }
+ if (config->mps == MLX5_MPW_ENHANCED &&
+ config->txq_inline_min <= 0) {
+ /*
+ * The NIC supports Enhanced Multi-Packet Write.
+ * We do not support legacy MPW due to its
+ * hardware related problems, so we just ignore
+ * legacy MLX5_MPW settings. There should be no
+ * minimal required inline data.
+ */
+ olx |= MLX5_TXOFF_CONFIG_EMPW;
+ }
+ if (rte_flow_dynf_metadata_avail()) {
+ /* We should support Flow metadata. */
+ olx |= MLX5_TXOFF_CONFIG_METADATA;
+ }
+ /*
+ * Scan the routines table to find the minimal
+ * satisfying routine with requested offloads.
+ */
+ m = RTE_DIM(txoff_func);
+ for (i = 0; i < RTE_DIM(txoff_func); i++) {
+ unsigned int tmp;
+
+ tmp = txoff_func[i].olx;
+ if (tmp == olx) {
+ /* Meets requested offloads exactly.*/
+ m = i;
+ break;
+ }
+ if ((tmp & olx) != olx) {
+ /* Does not meet requested offloads at all. */
+ continue;
+ }
+ if ((olx ^ tmp) & MLX5_TXOFF_CONFIG_EMPW)
+ /* Do not enable eMPW if not configured. */
+ continue;
+ if ((olx ^ tmp) & MLX5_TXOFF_CONFIG_INLINE)
+ /* Do not enable inlining if not configured. */
+ continue;
+ /*
+ * Some routine meets the requirements.
+ * Check whether it has minimal amount
+ * of not requested offloads.
+ */
+ tmp = __builtin_popcountl(tmp & ~olx);
+ if (m >= RTE_DIM(txoff_func) || tmp < diff) {
+ /* First or better match, save and continue. */
+ m = i;
+ diff = tmp;
+ continue;
+ }
+ if (tmp == diff) {
+ tmp = txoff_func[i].olx ^ txoff_func[m].olx;
+ if (__builtin_ffsl(txoff_func[i].olx & ~tmp) <
+ __builtin_ffsl(txoff_func[m].olx & ~tmp)) {
+ /* Lighter not requested offload. */
+ m = i;
+ }
+ }
+ }
+ if (m >= RTE_DIM(txoff_func)) {
+ DRV_LOG(DEBUG, "port %u has no selected Tx function"
+ " for requested offloads %04X",
+ dev->data->port_id, olx);
+ return NULL;
+ }
+ DRV_LOG(DEBUG, "port %u has selected Tx function"
+ " supporting offloads %04X/%04X",
+ dev->data->port_id, olx, txoff_func[m].olx);
+ if (txoff_func[m].olx & MLX5_TXOFF_CONFIG_MULTI)
+ DRV_LOG(DEBUG, "\tMULTI (multi segment)");
+ if (txoff_func[m].olx & MLX5_TXOFF_CONFIG_TSO)
+ DRV_LOG(DEBUG, "\tTSO (TCP send offload)");
+ if (txoff_func[m].olx & MLX5_TXOFF_CONFIG_SWP)
+ DRV_LOG(DEBUG, "\tSWP (software parser)");
+ if (txoff_func[m].olx & MLX5_TXOFF_CONFIG_CSUM)
+ DRV_LOG(DEBUG, "\tCSUM (checksum offload)");
+ if (txoff_func[m].olx & MLX5_TXOFF_CONFIG_INLINE)
+ DRV_LOG(DEBUG, "\tINLIN (inline data)");
+ if (txoff_func[m].olx & MLX5_TXOFF_CONFIG_VLAN)
+ DRV_LOG(DEBUG, "\tVLANI (VLAN insertion)");
+ if (txoff_func[m].olx & MLX5_TXOFF_CONFIG_METADATA)
+ DRV_LOG(DEBUG, "\tMETAD (tx Flow metadata)");
+ if (txoff_func[m].olx & MLX5_TXOFF_CONFIG_EMPW)
+ DRV_LOG(DEBUG, "\tEMPW (Enhanced MPW)");
+ return txoff_func[m].func;
}
git.droids-corp.org / dpdk.git / blobdiff