/* SPDX-License-Identifier: BSD-3-Clause * Copyright 2021 6WIND S.A. * Copyright 2021 Mellanox Technologies, Ltd */ #ifndef RTE_PMD_MLX5_RX_H_ #define RTE_PMD_MLX5_RX_H_ #include #include #include #include #include #include #include #include "mlx5.h" #include "mlx5_autoconf.h" /* Support tunnel matching. */ #define MLX5_FLOW_TUNNEL 10 #define RXQ_PORT(rxq_ctrl) LIST_FIRST(&(rxq_ctrl)->owners)->priv #define RXQ_DEV(rxq_ctrl) ETH_DEV(RXQ_PORT(rxq_ctrl)) #define RXQ_PORT_ID(rxq_ctrl) PORT_ID(RXQ_PORT(rxq_ctrl)) /* First entry must be NULL for comparison. */ #define mlx5_mr_btree_len(bt) ((bt)->len - 1) struct mlx5_rxq_stats { #ifdef MLX5_PMD_SOFT_COUNTERS uint64_t ipackets; /**< Total of successfully received packets. */ uint64_t ibytes; /**< Total of successfully received bytes. */ #endif uint64_t idropped; /**< Total of packets dropped when RX ring full. */ uint64_t rx_nombuf; /**< Total of RX mbuf allocation failures. */ }; /* 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. */ }; /* Get pointer to the first stride. */ #define mlx5_mprq_buf_addr(ptr, strd_n) (RTE_PTR_ADD((ptr), \ sizeof(struct mlx5_mprq_buf) + \ (strd_n) * \ sizeof(struct rte_mbuf_ext_shared_info) + \ RTE_PKTMBUF_HEADROOM)) #define MLX5_MIN_SINGLE_STRIDE_LOG_NUM_BYTES 6 #define MLX5_MIN_SINGLE_WQE_LOG_NUM_STRIDES 9 enum mlx5_rxq_err_state { MLX5_RXQ_ERR_STATE_NO_ERROR = 0, MLX5_RXQ_ERR_STATE_NEED_RESET, MLX5_RXQ_ERR_STATE_NEED_READY, }; enum mlx5_rqx_code { MLX5_RXQ_CODE_EXIT = 0, MLX5_RXQ_CODE_NOMBUF, MLX5_RXQ_CODE_DROPPED, }; struct mlx5_eth_rxseg { struct rte_mempool *mp; /**< Memory pool to allocate segment from. */ uint16_t length; /**< Segment data length, configures split point. */ uint16_t offset; /**< Data offset from beginning of mbuf data buffer. */ uint32_t reserved; /**< Reserved field. */ }; /* RX queue descriptor. */ struct mlx5_rxq_data { unsigned int csum:1; /* Enable checksum offloading. */ unsigned int hw_timestamp:1; /* Enable HW timestamp. */ unsigned int rt_timestamp:1; /* Realtime timestamp format. */ unsigned int vlan_strip:1; /* Enable VLAN stripping. */ unsigned int crc_present:1; /* CRC must be subtracted. */ unsigned int sges_n:3; /* 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 rss_hash:1; /* RSS hash result is enabled. */ unsigned int mark:1; /* Marked flow available on the queue. */ unsigned int log_strd_num:5; /* Log 2 of the number of stride. */ unsigned int log_strd_sz:4; /* Log 2 of stride size. */ unsigned int strd_shift_en:1; /* Enable 2bytes shift on a stride. */ unsigned int err_state:2; /* enum mlx5_rxq_err_state. */ unsigned int strd_scatter_en:1; /* Scattered packets from a stride. */ unsigned int lro:1; /* Enable LRO. */ unsigned int dynf_meta:1; /* Dynamic metadata is configured. */ unsigned int mcqe_format:3; /* CQE compression format. */ unsigned int shared:1; /* Shared RXQ. */ unsigned int delay_drop:1; /* Enable delay drop. */ volatile uint32_t *rq_db; volatile uint32_t *cq_db; uint16_t port_id; uint32_t elts_ci; uint32_t rq_ci; uint16_t consumed_strd; /* Number of consumed strides in WQE. */ uint32_t rq_pi; uint32_t cq_ci; uint16_t rq_repl_thresh; /* Threshold for buffer replenishment. */ uint32_t byte_mask; union { struct rxq_zip zip; /* Compressed context. */ uint16_t decompressed; /* Number of ready mbufs decompressed from the CQ. */ }; struct mlx5_mr_ctrl mr_ctrl; /* MR control descriptor. */ uint16_t mprq_max_memcpy_len; /* Maximum size of packet to memcpy. */ volatile void *wqes; volatile struct mlx5_cqe(*cqes)[]; struct rte_mbuf *(*elts)[]; struct mlx5_mprq_buf *(*mprq_bufs)[]; struct rte_mempool *mp; struct rte_mempool *mprq_mp; /* Mempool for Multi-Packet RQ. */ struct mlx5_mprq_buf *mprq_repl; /* Stashed mbuf for replenish. */ struct mlx5_dev_ctx_shared *sh; /* Shared context. */ uint16_t idx; /* Queue index. */ struct mlx5_rxq_stats stats; rte_xmm_t mbuf_initializer; /* Default rearm/flags for vectorized Rx. */ struct rte_mbuf fake_mbuf; /* elts padding for vectorized Rx. */ struct mlx5_uar_data uar_data; /* CQ doorbell. */ uint32_t cqn; /* CQ number. */ uint8_t cq_arm_sn; /* CQ arm seq number. */ uint32_t tunnel; /* Tunnel information. */ int timestamp_offset; /* Dynamic mbuf field for timestamp. */ uint64_t timestamp_rx_flag; /* Dynamic mbuf flag for timestamp. */ uint64_t flow_meta_mask; int32_t flow_meta_offset; uint32_t flow_meta_port_mask; uint32_t rxseg_n; /* Number of split segment descriptions. */ struct mlx5_eth_rxseg rxseg[MLX5_MAX_RXQ_NSEG]; /* Buffer split segment descriptions - sizes, offsets, pools. */ } __rte_cache_aligned; enum mlx5_rxq_type { MLX5_RXQ_TYPE_STANDARD, /* Standard Rx queue. */ MLX5_RXQ_TYPE_HAIRPIN, /* Hairpin Rx queue. */ MLX5_RXQ_TYPE_UNDEFINED, }; /* RX queue control descriptor. */ struct mlx5_rxq_ctrl { struct mlx5_rxq_data rxq; /* Data path structure. */ LIST_ENTRY(mlx5_rxq_ctrl) next; /* Pointer to the next element. */ LIST_HEAD(priv, mlx5_rxq_priv) owners; /* Owner rxq list. */ struct mlx5_rxq_obj *obj; /* Verbs/DevX elements. */ struct mlx5_dev_ctx_shared *sh; /* Shared context. */ enum mlx5_rxq_type type; /* Rxq type. */ unsigned int socket; /* CPU socket ID for allocations. */ LIST_ENTRY(mlx5_rxq_ctrl) share_entry; /* Entry in shared RXQ list. */ uint32_t share_group; /* Group ID of shared RXQ. */ uint16_t share_qid; /* Shared RxQ ID in group. */ unsigned int started:1; /* Whether (shared) RXQ has been started. */ unsigned int irq:1; /* Whether IRQ is enabled. */ uint32_t flow_tunnels_n[MLX5_FLOW_TUNNEL]; /* Tunnels counters. */ uint32_t wqn; /* WQ number. */ uint32_t rxseg_n; /* Number of split segment descriptions. */ struct rte_eth_rxseg_split rxseg[MLX5_MAX_RXQ_NSEG]; /* Saved original buffer split segment configuration. */ uint16_t dump_file_n; /* Number of dump files. */ }; /* RX queue private data. */ struct mlx5_rxq_priv { uint16_t idx; /* Queue index. */ uint32_t refcnt; /* Reference counter. */ struct mlx5_rxq_ctrl *ctrl; /* Shared Rx Queue. */ LIST_ENTRY(mlx5_rxq_priv) owner_entry; /* Entry in shared rxq_ctrl. */ struct mlx5_priv *priv; /* Back pointer to private data. */ struct mlx5_devx_rq devx_rq; struct rte_eth_hairpin_conf hairpin_conf; /* Hairpin configuration. */ uint32_t hairpin_status; /* Hairpin binding status. */ }; /* mlx5_rxq.c */ extern uint8_t rss_hash_default_key[]; unsigned int mlx5_rxq_cqe_num(struct mlx5_rxq_data *rxq_data); int mlx5_mprq_free_mp(struct rte_eth_dev *dev); int mlx5_mprq_alloc_mp(struct rte_eth_dev *dev); int mlx5_rx_queue_start(struct rte_eth_dev *dev, uint16_t queue_id); int mlx5_rx_queue_stop(struct rte_eth_dev *dev, uint16_t queue_id); int mlx5_rx_queue_start_primary(struct rte_eth_dev *dev, uint16_t queue_id); int mlx5_rx_queue_stop_primary(struct rte_eth_dev *dev, uint16_t queue_id); int mlx5_rx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc, unsigned int socket, const struct rte_eth_rxconf *conf, struct rte_mempool *mp); int mlx5_rx_hairpin_queue_setup (struct rte_eth_dev *dev, uint16_t idx, uint16_t desc, const struct rte_eth_hairpin_conf *hairpin_conf); void mlx5_rx_queue_release(struct rte_eth_dev *dev, uint16_t qid); int mlx5_rx_intr_vec_enable(struct rte_eth_dev *dev); void mlx5_rx_intr_vec_disable(struct rte_eth_dev *dev); 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); int mlx5_rxq_obj_verify(struct rte_eth_dev *dev); struct mlx5_rxq_ctrl *mlx5_rxq_new(struct rte_eth_dev *dev, struct mlx5_rxq_priv *rxq, uint16_t desc, unsigned int socket, const struct rte_eth_rxconf *conf, const struct rte_eth_rxseg_split *rx_seg, uint16_t n_seg); struct mlx5_rxq_ctrl *mlx5_rxq_hairpin_new (struct rte_eth_dev *dev, struct mlx5_rxq_priv *rxq, uint16_t desc, const struct rte_eth_hairpin_conf *hairpin_conf); struct mlx5_rxq_priv *mlx5_rxq_ref(struct rte_eth_dev *dev, uint16_t idx); uint32_t mlx5_rxq_deref(struct rte_eth_dev *dev, uint16_t idx); struct mlx5_rxq_priv *mlx5_rxq_get(struct rte_eth_dev *dev, uint16_t idx); struct mlx5_rxq_ctrl *mlx5_rxq_ctrl_get(struct rte_eth_dev *dev, uint16_t idx); struct mlx5_rxq_data *mlx5_rxq_data_get(struct rte_eth_dev *dev, uint16_t idx); int mlx5_rxq_release(struct rte_eth_dev *dev, uint16_t idx); int mlx5_rxq_verify(struct rte_eth_dev *dev); int rxq_alloc_elts(struct mlx5_rxq_ctrl *rxq_ctrl); int mlx5_ind_table_obj_verify(struct rte_eth_dev *dev); struct mlx5_ind_table_obj *mlx5_ind_table_obj_get(struct rte_eth_dev *dev, const uint16_t *queues, uint32_t queues_n); int mlx5_ind_table_obj_release(struct rte_eth_dev *dev, struct mlx5_ind_table_obj *ind_tbl, bool standalone, bool deref_rxqs); int mlx5_ind_table_obj_setup(struct rte_eth_dev *dev, struct mlx5_ind_table_obj *ind_tbl, bool ref_qs); int mlx5_ind_table_obj_modify(struct rte_eth_dev *dev, struct mlx5_ind_table_obj *ind_tbl, uint16_t *queues, const uint32_t queues_n, bool standalone, bool ref_new_qs, bool deref_old_qs); int mlx5_ind_table_obj_attach(struct rte_eth_dev *dev, struct mlx5_ind_table_obj *ind_tbl); int mlx5_ind_table_obj_detach(struct rte_eth_dev *dev, struct mlx5_ind_table_obj *ind_tbl); struct mlx5_list_entry *mlx5_hrxq_create_cb(void *tool_ctx, void *cb_ctx); int mlx5_hrxq_match_cb(void *tool_ctx, struct mlx5_list_entry *entry, void *cb_ctx); void mlx5_hrxq_remove_cb(void *tool_ctx, struct mlx5_list_entry *entry); struct mlx5_list_entry *mlx5_hrxq_clone_cb(void *tool_ctx, struct mlx5_list_entry *entry, void *cb_ctx __rte_unused); void mlx5_hrxq_clone_free_cb(void *tool_ctx __rte_unused, struct mlx5_list_entry *entry); uint32_t mlx5_hrxq_get(struct rte_eth_dev *dev, struct mlx5_flow_rss_desc *rss_desc); int mlx5_hrxq_release(struct rte_eth_dev *dev, uint32_t hxrq_idx); uint32_t mlx5_hrxq_verify(struct rte_eth_dev *dev); enum mlx5_rxq_type mlx5_rxq_get_type(struct rte_eth_dev *dev, uint16_t idx); const struct rte_eth_hairpin_conf *mlx5_rxq_get_hairpin_conf (struct rte_eth_dev *dev, uint16_t idx); struct mlx5_hrxq *mlx5_drop_action_create(struct rte_eth_dev *dev); void mlx5_drop_action_destroy(struct rte_eth_dev *dev); uint64_t mlx5_get_rx_port_offloads(void); uint64_t mlx5_get_rx_queue_offloads(struct rte_eth_dev *dev); void mlx5_rxq_timestamp_set(struct rte_eth_dev *dev); int mlx5_hrxq_modify(struct rte_eth_dev *dev, uint32_t hxrq_idx, const uint8_t *rss_key, uint32_t rss_key_len, uint64_t hash_fields, const uint16_t *queues, uint32_t queues_n); /* mlx5_rx.c */ uint16_t mlx5_rx_burst(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n); void mlx5_rxq_initialize(struct mlx5_rxq_data *rxq); __rte_noinline int mlx5_rx_err_handle(struct mlx5_rxq_data *rxq, uint8_t vec); void mlx5_mprq_buf_free(struct mlx5_mprq_buf *buf); uint16_t mlx5_rx_burst_mprq(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n); int mlx5_rx_descriptor_status(void *rx_queue, uint16_t offset); uint32_t mlx5_rx_queue_count(void *rx_queue); void mlx5_rxq_info_get(struct rte_eth_dev *dev, uint16_t queue_id, struct rte_eth_rxq_info *qinfo); int mlx5_rx_burst_mode_get(struct rte_eth_dev *dev, uint16_t rx_queue_id, struct rte_eth_burst_mode *mode); int mlx5_get_monitor_addr(void *rx_queue, struct rte_power_monitor_cond *pmc); /* Vectorized version of mlx5_rx.c */ int mlx5_rxq_check_vec_support(struct mlx5_rxq_data *rxq_data); int mlx5_check_vec_rx_support(struct rte_eth_dev *dev); uint16_t mlx5_rx_burst_vec(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n); uint16_t mlx5_rx_burst_mprq_vec(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n); static int mlx5_rxq_mprq_enabled(struct mlx5_rxq_data *rxq); /** * Query LKey for an address on Rx. No need to flush local caches * as the Rx mempool database entries are valid for the lifetime of the queue. * * @param rxq * Pointer to Rx queue structure. * @param addr * Address to search. * * @return * Searched LKey on success, UINT32_MAX on no match. * This function always succeeds on valid input. */ static __rte_always_inline uint32_t mlx5_rx_addr2mr(struct mlx5_rxq_data *rxq, uintptr_t addr) { struct mlx5_mr_ctrl *mr_ctrl = &rxq->mr_ctrl; struct rte_mempool *mp; uint32_t lkey; /* Linear search on MR cache array. */ lkey = mlx5_mr_lookup_lkey(mr_ctrl->cache, &mr_ctrl->mru, MLX5_MR_CACHE_N, addr); if (likely(lkey != UINT32_MAX)) return lkey; mp = mlx5_rxq_mprq_enabled(rxq) ? rxq->mprq_mp : rxq->mp; return mlx5_mr_mempool2mr_bh(mr_ctrl, mp, addr); } /** * Query LKey from a packet buffer for Rx. No need to flush local caches * as the Rx mempool database entries are valid for the lifetime of the queue. * * @param rxq * Pointer to Rx queue structure. * @param mb * Buffer to search the address of. * * @return * Searched LKey on success, UINT32_MAX on no match. * This function always succeeds on valid input. */ static __rte_always_inline uint32_t mlx5_rx_mb2mr(struct mlx5_rxq_data *rxq, struct rte_mbuf *mb) { struct mlx5_mr_ctrl *mr_ctrl = &rxq->mr_ctrl; uintptr_t addr = (uintptr_t)mb->buf_addr; uint32_t lkey; /* Linear search on MR cache array. */ lkey = mlx5_mr_lookup_lkey(mr_ctrl->cache, &mr_ctrl->mru, MLX5_MR_CACHE_N, addr); if (likely(lkey != UINT32_MAX)) return lkey; /* Slower search in the mempool database on miss. */ return mlx5_mr_mempool2mr_bh(mr_ctrl, mb->pool, addr); } /** * Convert timestamp from HW format to linear counter * from Packet Pacing Clock Queue CQE timestamp format. * * @param sh * Pointer to the device shared context. Might be needed * to convert according current device configuration. * @param ts * Timestamp from CQE to convert. * @return * UTC in nanoseconds */ static __rte_always_inline uint64_t mlx5_txpp_convert_rx_ts(struct mlx5_dev_ctx_shared *sh, uint64_t ts) { RTE_SET_USED(sh); return (ts & UINT32_MAX) + (ts >> 32) * NS_PER_S; } /** * Set timestamp in mbuf dynamic field. * * @param mbuf * Structure to write into. * @param offset * Dynamic field offset in mbuf structure. * @param timestamp * Value to write. */ static __rte_always_inline void mlx5_timestamp_set(struct rte_mbuf *mbuf, int offset, rte_mbuf_timestamp_t timestamp) { *RTE_MBUF_DYNFIELD(mbuf, offset, rte_mbuf_timestamp_t *) = timestamp; } /** * Replace MPRQ buffer. * * @param rxq * Pointer to Rx queue structure. * @param rq_idx * RQ index to replace. */ static __rte_always_inline void mprq_buf_replace(struct mlx5_rxq_data *rxq, uint16_t rq_idx) { const uint32_t strd_n = RTE_BIT32(rxq->log_strd_num); 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; struct mlx5_mprq_buf *buf = (*rxq->mprq_bufs)[rq_idx]; void *addr; if (__atomic_load_n(&buf->refcnt, __ATOMIC_RELAXED) > 1) { MLX5_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; /* 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; } } /** * Attach or copy MPRQ buffer content to a packet. * * @param rxq * Pointer to Rx queue structure. * @param pkt * Pointer to a packet to fill. * @param len * Packet length. * @param buf * Pointer to a MPRQ buffer to take the data from. * @param strd_idx * Stride index to start from. * @param strd_cnt * Number of strides to consume. */ static __rte_always_inline enum mlx5_rqx_code mprq_buf_to_pkt(struct mlx5_rxq_data *rxq, struct rte_mbuf *pkt, uint32_t len, struct mlx5_mprq_buf *buf, uint16_t strd_idx, uint16_t strd_cnt) { const uint32_t strd_n = RTE_BIT32(rxq->log_strd_num); const uint16_t strd_sz = RTE_BIT32(rxq->log_strd_sz); const uint16_t strd_shift = MLX5_MPRQ_STRIDE_SHIFT_BYTE * rxq->strd_shift_en; const int32_t hdrm_overlap = len + RTE_PKTMBUF_HEADROOM - strd_cnt * strd_sz; const uint32_t offset = strd_idx * strd_sz + strd_shift; void *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. * - The packet's stride overlaps a headroom and scatter is off. */ if (len <= rxq->mprq_max_memcpy_len || rxq->mprq_repl == NULL || (hdrm_overlap > 0 && !rxq->strd_scatter_en)) { if (likely(len <= (uint32_t)(pkt->buf_len - RTE_PKTMBUF_HEADROOM))) { rte_memcpy(rte_pktmbuf_mtod(pkt, void *), addr, len); DATA_LEN(pkt) = len; } else if (rxq->strd_scatter_en) { struct rte_mbuf *prev = pkt; uint32_t seg_len = RTE_MIN(len, (uint32_t) (pkt->buf_len - RTE_PKTMBUF_HEADROOM)); uint32_t rem_len = len - seg_len; rte_memcpy(rte_pktmbuf_mtod(pkt, void *), addr, seg_len); DATA_LEN(pkt) = seg_len; while (rem_len) { struct rte_mbuf *next = rte_pktmbuf_alloc(rxq->mp); if (unlikely(next == NULL)) return MLX5_RXQ_CODE_NOMBUF; NEXT(prev) = next; SET_DATA_OFF(next, 0); addr = RTE_PTR_ADD(addr, seg_len); seg_len = RTE_MIN(rem_len, (uint32_t) (next->buf_len - RTE_PKTMBUF_HEADROOM)); rte_memcpy (rte_pktmbuf_mtod(next, void *), addr, seg_len); DATA_LEN(next) = seg_len; rem_len -= seg_len; prev = next; ++NB_SEGS(pkt); } } else { return MLX5_RXQ_CODE_DROPPED; } } 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. */ __atomic_add_fetch(&buf->refcnt, 1, __ATOMIC_RELAXED); MLX5_ASSERT(__atomic_load_n(&buf->refcnt, __ATOMIC_RELAXED) <= strd_n + 1); buf_addr = RTE_PTR_SUB(addr, RTE_PKTMBUF_HEADROOM); /* * 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); /* * RTE_MBUF_F_EXTERNAL 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. */ SET_DATA_OFF(pkt, RTE_PKTMBUF_HEADROOM); MLX5_ASSERT(pkt->ol_flags & RTE_MBUF_F_EXTERNAL); MLX5_ASSERT(rte_pktmbuf_tailroom(pkt) >= len - (hdrm_overlap > 0 ? hdrm_overlap : 0)); DATA_LEN(pkt) = len; /* * Copy the last fragment of a packet (up to headroom * size bytes) in case there is a stride overlap with * a next packet's headroom. Allocate a separate mbuf * to store this fragment and link it. Scatter is on. */ if (hdrm_overlap > 0) { MLX5_ASSERT(rxq->strd_scatter_en); struct rte_mbuf *seg = rte_pktmbuf_alloc(rxq->mp); if (unlikely(seg == NULL)) return MLX5_RXQ_CODE_NOMBUF; SET_DATA_OFF(seg, 0); rte_memcpy(rte_pktmbuf_mtod(seg, void *), RTE_PTR_ADD(addr, len - hdrm_overlap), hdrm_overlap); DATA_LEN(seg) = hdrm_overlap; DATA_LEN(pkt) = len - hdrm_overlap; NEXT(pkt) = seg; NB_SEGS(pkt) = 2; } } return MLX5_RXQ_CODE_EXIT; } /** * Check whether Multi-Packet RQ can be enabled for the device. * * @param dev * Pointer to Ethernet device. * * @return * 1 if supported, negative errno value if not. */ static __rte_always_inline int mlx5_check_mprq_support(struct rte_eth_dev *dev) { struct mlx5_priv *priv = dev->data->dev_private; if (priv->config.mprq.enabled && priv->rxqs_n >= priv->config.mprq.min_rxqs_num) return 1; return -ENOTSUP; } /** * Check whether Multi-Packet RQ is enabled for the Rx queue. * * @param rxq * Pointer to receive queue structure. * * @return * 0 if disabled, otherwise enabled. */ static __rte_always_inline int mlx5_rxq_mprq_enabled(struct mlx5_rxq_data *rxq) { return rxq->log_strd_num > 0; } /** * Check whether Multi-Packet RQ is enabled for the device. * * @param dev * Pointer to Ethernet device. * * @return * 0 if disabled, otherwise enabled. */ static __rte_always_inline int mlx5_mprq_enabled(struct rte_eth_dev *dev) { struct mlx5_priv *priv = dev->data->dev_private; uint32_t i; uint16_t n = 0; uint16_t n_ibv = 0; if (mlx5_check_mprq_support(dev) < 0) return 0; /* All the configured queues should be enabled. */ for (i = 0; i < priv->rxqs_n; ++i) { struct mlx5_rxq_ctrl *rxq_ctrl = mlx5_rxq_ctrl_get(dev, i); if (rxq_ctrl == NULL || rxq_ctrl->type != MLX5_RXQ_TYPE_STANDARD) continue; n_ibv++; if (mlx5_rxq_mprq_enabled(&rxq_ctrl->rxq)) ++n; } /* Multi-Packet RQ can't be partially configured. */ MLX5_ASSERT(n == 0 || n == n_ibv); return n == n_ibv; } #endif /* RTE_PMD_MLX5_RX_H_ */