diff options
Diffstat (limited to 'drivers/net/mlx4/mlx4_rxtx.h')
| -rw-r--r-- | drivers/net/mlx4/mlx4_rxtx.h | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/drivers/net/mlx4/mlx4_rxtx.h b/drivers/net/mlx4/mlx4_rxtx.h new file mode 100644 index 00000000..4acad801 --- /dev/null +++ b/drivers/net/mlx4/mlx4_rxtx.h @@ -0,0 +1,214 @@ +/*- + * BSD LICENSE + * + * Copyright 2017 6WIND S.A. + * Copyright 2017 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. + */ + +#ifndef MLX4_RXTX_H_ +#define MLX4_RXTX_H_ + +#include <stdint.h> +#include <sys/queue.h> + +/* Verbs headers do not support -pedantic. */ +#ifdef PEDANTIC +#pragma GCC diagnostic ignored "-Wpedantic" +#endif +#include <infiniband/mlx4dv.h> +#include <infiniband/verbs.h> +#ifdef PEDANTIC +#pragma GCC diagnostic error "-Wpedantic" +#endif + +#include <rte_ethdev.h> +#include <rte_mbuf.h> +#include <rte_mempool.h> + +#include "mlx4.h" +#include "mlx4_prm.h" + +/** Rx queue counters. */ +struct mlx4_rxq_stats { + unsigned int idx; /**< Mapping index. */ + uint64_t ipackets; /**< Total of successfully received packets. */ + uint64_t ibytes; /**< Total of successfully received bytes. */ + uint64_t idropped; /**< Total of packets dropped when Rx ring full. */ + uint64_t rx_nombuf; /**< Total of Rx mbuf allocation failures. */ +}; + +/** Rx queue descriptor. */ +struct rxq { + struct priv *priv; /**< Back pointer to private data. */ + struct rte_mempool *mp; /**< Memory pool for allocations. */ + struct mlx4_mr *mr; /**< Memory region. */ + struct ibv_cq *cq; /**< Completion queue. */ + struct ibv_wq *wq; /**< Work queue. */ + struct ibv_comp_channel *channel; /**< Rx completion channel. */ + uint16_t rq_ci; /**< Saved RQ consumer index. */ + uint16_t port_id; /**< Port ID for incoming packets. */ + uint16_t sges_n; /**< Number of segments per packet (log2 value). */ + uint16_t elts_n; /**< Mbuf queue size (log2 value). */ + struct rte_mbuf *(*elts)[]; /**< Rx elements. */ + volatile struct mlx4_wqe_data_seg (*wqes)[]; /**< HW queue entries. */ + volatile uint32_t *rq_db; /**< RQ doorbell record. */ + uint32_t csum:1; /**< Enable checksum offloading. */ + uint32_t csum_l2tun:1; /**< Same for L2 tunnels. */ + struct mlx4_cq mcq; /**< Info for directly manipulating the CQ. */ + struct mlx4_rxq_stats stats; /**< Rx queue counters. */ + unsigned int socket; /**< CPU socket ID for allocations. */ + uint32_t usecnt; /**< Number of users relying on queue resources. */ + uint8_t data[]; /**< Remaining queue resources. */ +}; + +/** Shared flow target for Rx queues. */ +struct mlx4_rss { + LIST_ENTRY(mlx4_rss) next; /**< Next entry in list. */ + struct priv *priv; /**< Back pointer to private data. */ + uint32_t refcnt; /**< Reference count for this object. */ + uint32_t usecnt; /**< Number of users relying on @p qp and @p ind. */ + struct ibv_qp *qp; /**< Queue pair. */ + struct ibv_rwq_ind_table *ind; /**< Indirection table. */ + uint64_t fields; /**< Fields for RSS processing (Verbs format). */ + uint8_t key[MLX4_RSS_HASH_KEY_SIZE]; /**< Hash key to use. */ + uint16_t queues; /**< Number of target queues. */ + uint16_t queue_id[]; /**< Target queues. */ +}; + +/** Tx element. */ +struct txq_elt { + struct rte_mbuf *buf; /**< Buffer. */ +}; + +/** Rx queue counters. */ +struct mlx4_txq_stats { + unsigned int idx; /**< Mapping index. */ + uint64_t opackets; /**< Total of successfully sent packets. */ + uint64_t obytes; /**< Total of successfully sent bytes. */ + uint64_t odropped; /**< Total of packets not sent when Tx ring full. */ +}; + +/** Tx queue descriptor. */ +struct txq { + struct mlx4_sq msq; /**< Info for directly manipulating the SQ. */ + struct mlx4_cq mcq; /**< Info for directly manipulating the CQ. */ + unsigned int elts_head; /**< Current index in (*elts)[]. */ + unsigned int elts_tail; /**< First element awaiting completion. */ + unsigned int elts_comp; /**< Number of packets awaiting completion. */ + int elts_comp_cd; /**< Countdown for next completion. */ + unsigned int elts_comp_cd_init; /**< Initial value for countdown. */ + unsigned int elts_n; /**< (*elts)[] length. */ + struct txq_elt (*elts)[]; /**< Tx elements. */ + struct mlx4_txq_stats stats; /**< Tx queue counters. */ + uint32_t max_inline; /**< Max inline send size. */ + uint32_t csum:1; /**< Enable checksum offloading. */ + uint32_t csum_l2tun:1; /**< Same for L2 tunnels. */ + uint32_t lb:1; /**< Whether packets should be looped back by eSwitch. */ + uint8_t *bounce_buf; + /**< Memory used for storing the first DWORD of data TXBBs. */ + struct { + const struct rte_mempool *mp; /**< Cached memory pool. */ + struct mlx4_mr *mr; /**< Memory region (for mp). */ + uint32_t lkey; /**< mr->lkey copy. */ + } mp2mr[MLX4_PMD_TX_MP_CACHE]; /**< MP to MR translation table. */ + struct priv *priv; /**< Back pointer to private data. */ + unsigned int socket; /**< CPU socket ID for allocations. */ + struct ibv_cq *cq; /**< Completion queue. */ + struct ibv_qp *qp; /**< Queue pair. */ + uint8_t data[]; /**< Remaining queue resources. */ +}; + +/* mlx4_rxq.c */ + +uint8_t mlx4_rss_hash_key_default[MLX4_RSS_HASH_KEY_SIZE]; +int mlx4_rss_init(struct priv *priv); +void mlx4_rss_deinit(struct priv *priv); +struct mlx4_rss *mlx4_rss_get(struct priv *priv, uint64_t fields, + uint8_t key[MLX4_RSS_HASH_KEY_SIZE], + uint16_t queues, const uint16_t queue_id[]); +void mlx4_rss_put(struct mlx4_rss *rss); +int mlx4_rss_attach(struct mlx4_rss *rss); +void mlx4_rss_detach(struct mlx4_rss *rss); +int mlx4_rxq_attach(struct rxq *rxq); +void mlx4_rxq_detach(struct rxq *rxq); +int mlx4_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); +void mlx4_rx_queue_release(void *dpdk_rxq); + +/* mlx4_rxtx.c */ + +uint16_t mlx4_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts, + uint16_t pkts_n); +uint16_t mlx4_rx_burst(void *dpdk_rxq, struct rte_mbuf **pkts, + uint16_t pkts_n); +uint16_t mlx4_tx_burst_removed(void *dpdk_txq, struct rte_mbuf **pkts, + uint16_t pkts_n); +uint16_t mlx4_rx_burst_removed(void *dpdk_rxq, struct rte_mbuf **pkts, + uint16_t pkts_n); + +/* mlx4_txq.c */ + +int mlx4_tx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, + uint16_t desc, unsigned int socket, + const struct rte_eth_txconf *conf); +void mlx4_tx_queue_release(void *dpdk_txq); + +/** + * Get memory region (MR) <-> memory pool (MP) association from txq->mp2mr[]. + * Call mlx4_txq_add_mr() if MP is not registered yet. + * + * @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 inline uint32_t +mlx4_txq_mp2mr(struct txq *txq, struct rte_mempool *mp) +{ + unsigned int i; + + for (i = 0; (i != RTE_DIM(txq->mp2mr)); ++i) { + if (unlikely(txq->mp2mr[i].mp == NULL)) { + /* Unknown MP, add a new MR for it. */ + break; + } + if (txq->mp2mr[i].mp == mp) { + /* MP found MP. */ + return txq->mp2mr[i].lkey; + } + } + return mlx4_txq_add_mr(txq, mp, i); +} + +#endif /* MLX4_RXTX_H_ */ |