/* Verbs header. */
/* ISO C doesn't support unnamed structs/unions, disabling -pedantic. */
#ifdef PEDANTIC
-#pragma GCC diagnostic ignored "-pedantic"
+#pragma GCC diagnostic ignored "-Wpedantic"
#endif
#include <infiniband/verbs.h>
+#include <infiniband/mlx5_hw.h>
#ifdef PEDANTIC
-#pragma GCC diagnostic error "-pedantic"
+#pragma GCC diagnostic error "-Wpedantic"
#endif
-/* DPDK headers don't like -pedantic. */
-#ifdef PEDANTIC
-#pragma GCC diagnostic ignored "-pedantic"
-#endif
#include <rte_mbuf.h>
#include <rte_mempool.h>
-#ifdef PEDANTIC
-#pragma GCC diagnostic error "-pedantic"
-#endif
+#include <rte_common.h>
+#include <rte_hexdump.h>
#include "mlx5_utils.h"
#include "mlx5.h"
#include "mlx5_autoconf.h"
#include "mlx5_defs.h"
+#include "mlx5_prm.h"
struct mlx5_rxq_stats {
unsigned int idx; /**< Mapping index. */
uint64_t odropped; /**< Total of packets not sent when TX ring full. */
};
-/* RX element (scattered packets). */
-struct rxq_elt_sp {
- struct ibv_sge sges[MLX5_PMD_SGE_WR_N]; /* Scatter/Gather Elements. */
- struct rte_mbuf *bufs[MLX5_PMD_SGE_WR_N]; /* SGEs buffers. */
-};
-
-/* RX element. */
-struct rxq_elt {
- struct ibv_sge sge; /* Scatter/Gather Element. */
- struct rte_mbuf *buf; /* SGE buffer. */
-};
-
/* Flow director queue structure. */
struct fdir_queue {
struct ibv_qp *qp; /* Associated RX QP. */
struct ibv_exp_rwq_ind_table *ind_table; /* Indirection table. */
+ struct ibv_exp_wq *wq; /* Work queue. */
+ struct ibv_cq *cq; /* Completion queue. */
};
struct priv;
+/* Compressed CQE context. */
+struct rxq_zip {
+ uint16_t ai; /* Array index. */
+ uint16_t ca; /* Current array index. */
+ uint16_t na; /* Next array index. */
+ uint16_t cq_ci; /* The next CQE. */
+ uint32_t cqe_cnt; /* Number of CQEs. */
+};
+
/* RX queue descriptor. */
struct rxq {
- struct priv *priv; /* Back pointer to private data. */
- struct rte_mempool *mp; /* Memory Pool for allocations. */
- struct ibv_cq *cq; /* Completion Queue. */
- struct ibv_exp_wq *wq; /* Work Queue. */
- int32_t (*poll)(); /* Verbs poll function. */
- int32_t (*recv)(); /* Verbs receive function. */
- unsigned int port_id; /* Port ID for incoming packets. */
- unsigned int elts_n; /* (*elts)[] length. */
- unsigned int elts_head; /* Current index in (*elts)[]. */
- unsigned int sp:1; /* Use scattered RX elements. */
unsigned int csum:1; /* Enable checksum offloading. */
unsigned int csum_l2tun:1; /* Same for L2 tunnels. */
unsigned int vlan_strip:1; /* Enable VLAN stripping. */
unsigned int crc_present:1; /* CRC must be subtracted. */
- union {
- struct rxq_elt_sp (*sp)[]; /* Scattered RX elements. */
- struct rxq_elt (*no_sp)[]; /* RX elements. */
- } elts;
- unsigned int socket; /* CPU socket ID for allocations. */
- struct mlx5_rxq_stats stats; /* RX queue counters. */
- struct ibv_exp_res_domain *rd; /* Resource Domain. */
- struct fdir_queue fdir_queue; /* Flow director queue. */
+ unsigned int sges_n:2; /* Log 2 of SGEs (max buffers per packet). */
+ unsigned int cqe_n:4; /* Log 2 of CQ elements. */
+ unsigned int elts_n:4; /* Log 2 of Mbufs. */
+ unsigned int port_id:8;
+ unsigned int rss_hash:1; /* RSS hash result is enabled. */
+ unsigned int mark:1; /* Marked flow available on the queue. */
+ unsigned int pending_err:1; /* CQE error needs to be handled. */
+ unsigned int :7; /* Remaining bits. */
+ volatile uint32_t *rq_db;
+ volatile uint32_t *cq_db;
+ uint16_t rq_ci;
+ uint16_t rq_pi;
+ uint16_t cq_ci;
+ volatile struct mlx5_wqe_data_seg(*wqes)[];
+ volatile struct mlx5_cqe(*cqes)[];
+ struct rxq_zip zip; /* Compressed context. */
+ struct rte_mbuf *(*elts)[];
+ struct rte_mempool *mp;
+ struct mlx5_rxq_stats stats;
+ uint64_t mbuf_initializer; /* Default rearm_data for vectorized Rx. */
+ struct rte_mbuf fake_mbuf; /* elts padding for vectorized Rx. */
+} __rte_cache_aligned;
+
+/* RX queue control descriptor. */
+struct rxq_ctrl {
+ struct priv *priv; /* Back pointer to private data. */
+ struct ibv_cq *cq; /* Completion Queue. */
+ struct ibv_exp_wq *wq; /* Work Queue. */
+ struct fdir_queue *fdir_queue; /* Flow director queue. */
struct ibv_mr *mr; /* Memory Region (for mp). */
- struct ibv_exp_wq_family *if_wq; /* WQ burst interface. */
-#ifdef HAVE_EXP_DEVICE_ATTR_VLAN_OFFLOADS
- struct ibv_exp_cq_family_v1 *if_cq; /* CQ interface. */
-#else /* HAVE_EXP_DEVICE_ATTR_VLAN_OFFLOADS */
- struct ibv_exp_cq_family *if_cq; /* CQ interface. */
-#endif /* HAVE_EXP_DEVICE_ATTR_VLAN_OFFLOADS */
+ struct ibv_comp_channel *channel;
+ unsigned int socket; /* CPU socket ID for allocations. */
+ struct rxq rxq; /* Data path structure. */
};
/* Hash RX queue types. */
HASH_RXQ_TCPV4,
HASH_RXQ_UDPV4,
HASH_RXQ_IPV4,
-#ifdef HAVE_FLOW_SPEC_IPV6
HASH_RXQ_TCPV6,
HASH_RXQ_UDPV6,
HASH_RXQ_IPV6,
-#endif /* HAVE_FLOW_SPEC_IPV6 */
HASH_RXQ_ETH,
};
} hdr;
struct ibv_exp_flow_spec_tcp_udp tcp_udp;
struct ibv_exp_flow_spec_ipv4 ipv4;
-#ifdef HAVE_FLOW_SPEC_IPV6
struct ibv_exp_flow_spec_ipv6 ipv6;
-#endif /* HAVE_FLOW_SPEC_IPV6 */
struct ibv_exp_flow_spec_eth eth;
} flow_spec; /* Flow specification template. */
const struct hash_rxq_init *underlayer; /* Pointer to underlayer. */
struct ibv_qp *qp; /* Hash RX QP. */
enum hash_rxq_type type; /* Hash RX queue type. */
/* MAC flow steering rules, one per VLAN ID. */
- struct ibv_exp_flow *mac_flow[MLX5_MAX_MAC_ADDRESSES][MLX5_MAX_VLAN_IDS];
+ struct ibv_exp_flow *mac_flow
+ [MLX5_MAX_MAC_ADDRESSES][MLX5_MAX_VLAN_IDS];
struct ibv_exp_flow *special_flow
[MLX5_MAX_SPECIAL_FLOWS][MLX5_MAX_VLAN_IDS];
};
-/* TX element. */
-struct txq_elt {
- struct rte_mbuf *buf;
-};
-
-/* Linear buffer type. It is used when transmitting buffers with too many
- * segments that do not fit the hardware queue (see max_send_sge).
- * Extra segments are copied (linearized) in such buffers, replacing the
- * last SGE during TX.
- * The size is arbitrary but large enough to hold a jumbo frame with
- * 8 segments considering mbuf.buf_len is about 2048 bytes. */
-typedef uint8_t linear_t[16384];
-
/* TX queue descriptor. */
+__extension__
struct txq {
- struct priv *priv; /* Back pointer to private data. */
- int32_t (*poll_cnt)(struct ibv_cq *cq, uint32_t max);
- int (*send_pending)();
-#ifdef HAVE_VERBS_VLAN_INSERTION
- int (*send_pending_vlan)();
-#endif
-#if MLX5_PMD_MAX_INLINE > 0
- int (*send_pending_inline)();
-#ifdef HAVE_VERBS_VLAN_INSERTION
- int (*send_pending_inline_vlan)();
-#endif
-#endif
-#if MLX5_PMD_SGE_WR_N > 1
- int (*send_pending_sg_list)();
-#ifdef HAVE_VERBS_VLAN_INSERTION
- int (*send_pending_sg_list_vlan)();
-#endif
-#endif
- int (*send_flush)(struct ibv_qp *qp);
- struct ibv_cq *cq; /* Completion Queue. */
- struct ibv_qp *qp; /* Queue Pair. */
- struct txq_elt (*elts)[]; /* TX elements. */
-#if MLX5_PMD_MAX_INLINE > 0
- uint32_t max_inline; /* Max inline send size <= MLX5_PMD_MAX_INLINE. */
-#endif
- unsigned int elts_n; /* (*elts)[] length. */
- unsigned int elts_head; /* Current index in (*elts)[]. */
- unsigned int elts_tail; /* First element awaiting completion. */
- unsigned int elts_comp; /* Number of completion requests. */
- unsigned int elts_comp_cd; /* Countdown for next completion request. */
- unsigned int elts_comp_cd_init; /* Initial value for countdown. */
+ uint16_t elts_head; /* Current counter in (*elts)[]. */
+ uint16_t elts_tail; /* Counter of first element awaiting completion. */
+ uint16_t elts_comp; /* Counter since last completion request. */
+ uint16_t mpw_comp; /* WQ index since last completion request. */
+ uint16_t cq_ci; /* Consumer index for completion queue. */
+ uint16_t cq_pi; /* Producer index for completion queue. */
+ uint16_t wqe_ci; /* Consumer index for work queue. */
+ uint16_t wqe_pi; /* Producer index for work queue. */
+ uint16_t elts_n:4; /* (*elts)[] length (in log2). */
+ uint16_t cqe_n:4; /* Number of CQ elements (in log2). */
+ uint16_t wqe_n:4; /* Number of of WQ elements (in log2). */
+ uint16_t inline_en:1; /* When set inline is enabled. */
+ uint16_t tso_en:1; /* When set hardware TSO is enabled. */
+ uint16_t tunnel_en:1;
+ /* When set TX offload for tunneled packets are supported. */
+ uint16_t mpw_hdr_dseg:1; /* Enable DSEGs in the title WQEBB. */
+ uint16_t max_inline; /* Multiple of RTE_CACHE_LINE_SIZE to inline. */
+ uint16_t inline_max_packet_sz; /* Max packet size for inlining. */
+ uint32_t qp_num_8s; /* QP number shifted by 8. */
+ uint32_t flags; /* Flags for Tx Queue. */
+ volatile struct mlx5_cqe (*cqes)[]; /* Completion queue. */
+ volatile void *wqes; /* Work queue (use volatile to write into). */
+ volatile uint32_t *qp_db; /* Work queue doorbell. */
+ volatile uint32_t *cq_db; /* Completion queue doorbell. */
+ volatile void *bf_reg; /* Blueflame register. */
struct {
- const struct rte_mempool *mp; /* Cached Memory Pool. */
+ uintptr_t start; /* Start address of MR */
+ uintptr_t end; /* End address of MR */
struct ibv_mr *mr; /* Memory Region (for mp). */
- uint32_t lkey; /* mr->lkey */
+ uint32_t lkey; /* htonl(mr->lkey) */
} mp2mr[MLX5_PMD_TX_MP_CACHE]; /* MP to MR translation table. */
+ uint16_t mr_cache_idx; /* Index of last hit entry. */
+ struct rte_mbuf *(*elts)[]; /* TX elements. */
struct mlx5_txq_stats stats; /* TX queue counters. */
- /* Elements used only for init part are here. */
- linear_t (*elts_linear)[]; /* Linearized buffers. */
- struct ibv_mr *mr_linear; /* Memory Region for linearized buffers. */
-#ifdef HAVE_VERBS_VLAN_INSERTION
- struct ibv_exp_qp_burst_family_v1 *if_qp; /* QP burst interface. */
-#else
- struct ibv_exp_qp_burst_family *if_qp; /* QP burst interface. */
-#endif
- struct ibv_exp_cq_family *if_cq; /* CQ interface. */
- struct ibv_exp_res_domain *rd; /* Resource Domain. */
+} __rte_cache_aligned;
+
+/* TX queue control descriptor. */
+struct txq_ctrl {
+ struct priv *priv; /* Back pointer to private data. */
+ struct ibv_cq *cq; /* Completion Queue. */
+ struct ibv_qp *qp; /* Queue Pair. */
unsigned int socket; /* CPU socket ID for allocations. */
+ struct txq txq; /* Data path structure. */
};
/* mlx5_rxq.c */
void priv_destroy_hash_rxqs(struct priv *);
int priv_allow_flow_type(struct priv *, enum hash_rxq_flow_type);
int priv_rehash_flows(struct priv *);
-void rxq_cleanup(struct rxq *);
-int rxq_rehash(struct rte_eth_dev *, struct rxq *);
-int rxq_setup(struct rte_eth_dev *, struct rxq *, uint16_t, unsigned int,
- const struct rte_eth_rxconf *, struct rte_mempool *);
+void rxq_cleanup(struct rxq_ctrl *);
int mlx5_rx_queue_setup(struct rte_eth_dev *, uint16_t, uint16_t, unsigned int,
const struct rte_eth_rxconf *, struct rte_mempool *);
void mlx5_rx_queue_release(void *);
-uint16_t mlx5_rx_burst_secondary_setup(void *dpdk_rxq, struct rte_mbuf **pkts,
- uint16_t pkts_n);
-
+int priv_rx_intr_vec_enable(struct priv *priv);
+void priv_rx_intr_vec_disable(struct priv *priv);
+#ifdef HAVE_UPDATE_CQ_CI
+int mlx5_rx_intr_enable(struct rte_eth_dev *dev, uint16_t rx_queue_id);
+int mlx5_rx_intr_disable(struct rte_eth_dev *dev, uint16_t rx_queue_id);
+#endif /* HAVE_UPDATE_CQ_CI */
/* mlx5_txq.c */
-void txq_cleanup(struct txq *);
-int txq_setup(struct rte_eth_dev *dev, struct txq *txq, uint16_t desc,
- unsigned int socket, const struct rte_eth_txconf *conf);
-
+void txq_cleanup(struct txq_ctrl *);
+int txq_ctrl_setup(struct rte_eth_dev *, struct txq_ctrl *, uint16_t,
+ unsigned int, const struct rte_eth_txconf *);
int mlx5_tx_queue_setup(struct rte_eth_dev *, uint16_t, uint16_t, unsigned int,
const struct rte_eth_txconf *);
void mlx5_tx_queue_release(void *);
-uint16_t mlx5_tx_burst_secondary_setup(void *dpdk_txq, struct rte_mbuf **pkts,
- uint16_t pkts_n);
/* mlx5_rxtx.c */
-struct ibv_mr *mlx5_mp2mr(struct ibv_pd *, struct rte_mempool *);
-void txq_mp2mr_iter(struct rte_mempool *, void *);
+extern uint32_t mlx5_ptype_table[];
+
+void mlx5_set_ptype_table(void);
uint16_t mlx5_tx_burst(void *, struct rte_mbuf **, uint16_t);
-uint16_t mlx5_rx_burst_sp(void *, struct rte_mbuf **, uint16_t);
+uint16_t mlx5_tx_burst_mpw(void *, struct rte_mbuf **, uint16_t);
+uint16_t mlx5_tx_burst_mpw_inline(void *, struct rte_mbuf **, uint16_t);
+uint16_t mlx5_tx_burst_empw(void *, struct rte_mbuf **, uint16_t);
uint16_t mlx5_rx_burst(void *, struct rte_mbuf **, uint16_t);
uint16_t removed_tx_burst(void *, struct rte_mbuf **, uint16_t);
uint16_t removed_rx_burst(void *, struct rte_mbuf **, uint16_t);
+int mlx5_rx_descriptor_status(void *, uint16_t);
+int mlx5_tx_descriptor_status(void *, uint16_t);
+
+/* Vectorized version of mlx5_rxtx.c */
+int priv_check_raw_vec_tx_support(struct priv *);
+int priv_check_vec_tx_support(struct priv *);
+int rxq_check_vec_support(struct rxq *);
+int priv_check_vec_rx_support(struct priv *);
+uint16_t mlx5_tx_burst_raw_vec(void *, struct rte_mbuf **, uint16_t);
+uint16_t mlx5_tx_burst_vec(void *, struct rte_mbuf **, uint16_t);
+uint16_t mlx5_rx_burst_vec(void *, struct rte_mbuf **, uint16_t);
+
+/* mlx5_mr.c */
+
+struct ibv_mr *mlx5_mp2mr(struct ibv_pd *, struct rte_mempool *);
+void txq_mp2mr_iter(struct rte_mempool *, void *);
+uint32_t txq_mp2mr_reg(struct txq *, struct rte_mempool *, unsigned int);
+
+#ifndef NDEBUG
+/**
+ * Verify or set magic value in CQE.
+ *
+ * @param cqe
+ * Pointer to CQE.
+ *
+ * @return
+ * 0 the first time.
+ */
+static inline int
+check_cqe_seen(volatile struct mlx5_cqe *cqe)
+{
+ static const uint8_t magic[] = "seen";
+ volatile uint8_t (*buf)[sizeof(cqe->rsvd0)] = &cqe->rsvd0;
+ int ret = 1;
+ unsigned int i;
+
+ for (i = 0; i < sizeof(magic) && i < sizeof(*buf); ++i)
+ if (!ret || (*buf)[i] != magic[i]) {
+ ret = 0;
+ (*buf)[i] = magic[i];
+ }
+ return ret;
+}
+#endif /* NDEBUG */
+
+/**
+ * Check whether CQE is valid.
+ *
+ * @param cqe
+ * Pointer to CQE.
+ * @param cqes_n
+ * Size of completion queue.
+ * @param ci
+ * Consumer index.
+ *
+ * @return
+ * 0 on success, 1 on failure.
+ */
+static __rte_always_inline int
+check_cqe(volatile struct mlx5_cqe *cqe,
+ unsigned int cqes_n, const uint16_t ci)
+{
+ uint16_t idx = ci & cqes_n;
+ uint8_t op_own = cqe->op_own;
+ uint8_t op_owner = MLX5_CQE_OWNER(op_own);
+ uint8_t op_code = MLX5_CQE_OPCODE(op_own);
+
+ if (unlikely((op_owner != (!!(idx))) || (op_code == MLX5_CQE_INVALID)))
+ return 1; /* No CQE. */
+#ifndef NDEBUG
+ if ((op_code == MLX5_CQE_RESP_ERR) ||
+ (op_code == MLX5_CQE_REQ_ERR)) {
+ volatile struct mlx5_err_cqe *err_cqe = (volatile void *)cqe;
+ uint8_t syndrome = err_cqe->syndrome;
+
+ if ((syndrome == MLX5_CQE_SYNDROME_LOCAL_LENGTH_ERR) ||
+ (syndrome == MLX5_CQE_SYNDROME_REMOTE_ABORTED_ERR))
+ return 0;
+ if (!check_cqe_seen(cqe)) {
+ ERROR("unexpected CQE error %u (0x%02x)"
+ " syndrome 0x%02x",
+ op_code, op_code, syndrome);
+ rte_hexdump(stderr, "MLX5 Error CQE:",
+ (const void *)((uintptr_t)err_cqe),
+ sizeof(*err_cqe));
+ }
+ return 1;
+ } else if ((op_code != MLX5_CQE_RESP_SEND) &&
+ (op_code != MLX5_CQE_REQ)) {
+ if (!check_cqe_seen(cqe)) {
+ ERROR("unexpected CQE opcode %u (0x%02x)",
+ op_code, op_code);
+ rte_hexdump(stderr, "MLX5 CQE:",
+ (const void *)((uintptr_t)cqe),
+ sizeof(*cqe));
+ }
+ return 1;
+ }
+#endif /* NDEBUG */
+ return 0;
+}
+
+/**
+ * Return the address of the WQE.
+ *
+ * @param txq
+ * Pointer to TX queue structure.
+ * @param wqe_ci
+ * WQE consumer index.
+ *
+ * @return
+ * WQE address.
+ */
+static inline uintptr_t *
+tx_mlx5_wqe(struct txq *txq, uint16_t ci)
+{
+ ci &= ((1 << txq->wqe_n) - 1);
+ return (uintptr_t *)((uintptr_t)txq->wqes + ci * MLX5_WQE_SIZE);
+}
+
+/**
+ * Manage TX completions.
+ *
+ * When sending a burst, mlx5_tx_burst() posts several WRs.
+ *
+ * @param txq
+ * Pointer to TX queue structure.
+ */
+static __rte_always_inline void
+mlx5_tx_complete(struct txq *txq)
+{
+ const uint16_t elts_n = 1 << txq->elts_n;
+ const uint16_t elts_m = elts_n - 1;
+ const unsigned int cqe_n = 1 << txq->cqe_n;
+ const unsigned int cqe_cnt = cqe_n - 1;
+ uint16_t elts_free = txq->elts_tail;
+ uint16_t elts_tail;
+ uint16_t cq_ci = txq->cq_ci;
+ volatile struct mlx5_cqe *cqe = NULL;
+ volatile struct mlx5_wqe_ctrl *ctrl;
+ struct rte_mbuf *m, *free[elts_n];
+ struct rte_mempool *pool = NULL;
+ unsigned int blk_n = 0;
+
+ cqe = &(*txq->cqes)[cq_ci & cqe_cnt];
+ if (unlikely(check_cqe(cqe, cqe_n, cq_ci)))
+ return;
+#ifndef NDEBUG
+ if ((MLX5_CQE_OPCODE(cqe->op_own) == MLX5_CQE_RESP_ERR) ||
+ (MLX5_CQE_OPCODE(cqe->op_own) == MLX5_CQE_REQ_ERR)) {
+ if (!check_cqe_seen(cqe)) {
+ ERROR("unexpected error CQE, TX stopped");
+ rte_hexdump(stderr, "MLX5 TXQ:",
+ (const void *)((uintptr_t)txq->wqes),
+ ((1 << txq->wqe_n) *
+ MLX5_WQE_SIZE));
+ }
+ return;
+ }
+#endif /* NDEBUG */
+ ++cq_ci;
+ txq->wqe_pi = ntohs(cqe->wqe_counter);
+ ctrl = (volatile struct mlx5_wqe_ctrl *)
+ tx_mlx5_wqe(txq, txq->wqe_pi);
+ elts_tail = ctrl->ctrl3;
+ assert((elts_tail & elts_m) < (1 << txq->wqe_n));
+ /* Free buffers. */
+ while (elts_free != elts_tail) {
+ m = rte_pktmbuf_prefree_seg((*txq->elts)[elts_free++ & elts_m]);
+ if (likely(m != NULL)) {
+ if (likely(m->pool == pool)) {
+ free[blk_n++] = m;
+ } else {
+ if (likely(pool != NULL))
+ rte_mempool_put_bulk(pool,
+ (void *)free,
+ blk_n);
+ free[0] = m;
+ pool = m->pool;
+ blk_n = 1;
+ }
+ }
+ }
+ if (blk_n)
+ rte_mempool_put_bulk(pool, (void *)free, blk_n);
+#ifndef NDEBUG
+ elts_free = txq->elts_tail;
+ /* Poisoning. */
+ while (elts_free != elts_tail) {
+ memset(&(*txq->elts)[elts_free & elts_m],
+ 0x66,
+ sizeof((*txq->elts)[elts_free & elts_m]));
+ ++elts_free;
+ }
+#endif
+ txq->cq_ci = cq_ci;
+ txq->elts_tail = elts_tail;
+ /* Update the consumer index. */
+ rte_wmb();
+ *txq->cq_db = htonl(cq_ci);
+}
+
+/**
+ * Get Memory Pool (MP) from mbuf. If mbuf is indirect, the pool from which
+ * the cloned mbuf is allocated is returned instead.
+ *
+ * @param buf
+ * Pointer to mbuf.
+ *
+ * @return
+ * Memory pool where data is located for given mbuf.
+ */
+static struct rte_mempool *
+mlx5_tx_mb2mp(struct rte_mbuf *buf)
+{
+ if (unlikely(RTE_MBUF_INDIRECT(buf)))
+ return rte_mbuf_from_indirect(buf)->pool;
+ return buf->pool;
+}
+
+/**
+ * Get Memory Region (MR) <-> rte_mbuf association from txq->mp2mr[].
+ * Add MP to txq->mp2mr[] if it's not registered yet. If mp2mr[] is full,
+ * remove an entry first.
+ *
+ * @param txq
+ * Pointer to TX queue structure.
+ * @param[in] mp
+ * Memory Pool for which a Memory Region lkey must be returned.
+ *
+ * @return
+ * mr->lkey on success, (uint32_t)-1 on failure.
+ */
+static __rte_always_inline uint32_t
+mlx5_tx_mb2mr(struct txq *txq, struct rte_mbuf *mb)
+{
+ uint16_t i = txq->mr_cache_idx;
+ uintptr_t addr = rte_pktmbuf_mtod(mb, uintptr_t);
+
+ assert(i < RTE_DIM(txq->mp2mr));
+ if (likely(txq->mp2mr[i].start <= addr && txq->mp2mr[i].end >= addr))
+ return txq->mp2mr[i].lkey;
+ for (i = 0; (i != RTE_DIM(txq->mp2mr)); ++i) {
+ if (unlikely(txq->mp2mr[i].mr == NULL)) {
+ /* Unknown MP, add a new MR for it. */
+ break;
+ }
+ if (txq->mp2mr[i].start <= addr &&
+ txq->mp2mr[i].end >= addr) {
+ assert(txq->mp2mr[i].lkey != (uint32_t)-1);
+ assert(htonl(txq->mp2mr[i].mr->lkey) ==
+ txq->mp2mr[i].lkey);
+ txq->mr_cache_idx = i;
+ return txq->mp2mr[i].lkey;
+ }
+ }
+ txq->mr_cache_idx = 0;
+ return txq_mp2mr_reg(txq, mlx5_tx_mb2mp(mb), i);
+}
+
+/**
+ * Ring TX queue doorbell.
+ *
+ * @param txq
+ * Pointer to TX queue structure.
+ * @param wqe
+ * Pointer to the last WQE posted in the NIC.
+ */
+static __rte_always_inline void
+mlx5_tx_dbrec(struct txq *txq, volatile struct mlx5_wqe *wqe)
+{
+ uint64_t *dst = (uint64_t *)((uintptr_t)txq->bf_reg);
+ volatile uint64_t *src = ((volatile uint64_t *)wqe);
+
+ rte_io_wmb();
+ *txq->qp_db = htonl(txq->wqe_ci);
+ /* Ensure ordering between DB record and BF copy. */
+ rte_wmb();
+ *dst = *src;
+}
#endif /* RTE_PMD_MLX5_RXTX_H_ */