/* SPDX-License-Identifier: BSD-3-Clause * Copyright 2015 6WIND S.A. * Copyright 2015 Mellanox Technologies, Ltd */ #include #include #include #include #include #include #include /* Verbs header. */ /* ISO C doesn't support unnamed structs/unions, disabling -pedantic. */ #ifdef PEDANTIC #pragma GCC diagnostic ignored "-Wpedantic" #endif #include #include #ifdef PEDANTIC #pragma GCC diagnostic error "-Wpedantic" #endif #include #include #include #include #include #include #include #include "mlx5.h" #include "mlx5_rxtx.h" #include "mlx5_utils.h" #include "mlx5_autoconf.h" #include "mlx5_defs.h" #include "mlx5_glue.h" /* Default RSS hash key also used for ConnectX-3. */ uint8_t rss_hash_default_key[] = { 0x2c, 0xc6, 0x81, 0xd1, 0x5b, 0xdb, 0xf4, 0xf7, 0xfc, 0xa2, 0x83, 0x19, 0xdb, 0x1a, 0x3e, 0x94, 0x6b, 0x9e, 0x38, 0xd9, 0x2c, 0x9c, 0x03, 0xd1, 0xad, 0x99, 0x44, 0xa7, 0xd9, 0x56, 0x3d, 0x59, 0x06, 0x3c, 0x25, 0xf3, 0xfc, 0x1f, 0xdc, 0x2a, }; /* Length of the default RSS hash key. */ static_assert(MLX5_RSS_HASH_KEY_LEN == (unsigned int)sizeof(rss_hash_default_key), "wrong RSS default key size."); /** * 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. */ inline int mlx5_check_mprq_support(struct rte_eth_dev *dev) { struct 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. */ inline int mlx5_rxq_mprq_enabled(struct mlx5_rxq_data *rxq) { return rxq->strd_num_n > 0; } /** * Check whether Multi-Packet RQ is enabled for the device. * * @param dev * Pointer to Ethernet device. * * @return * 0 if disabled, otherwise enabled. */ inline int mlx5_mprq_enabled(struct rte_eth_dev *dev) { struct priv *priv = dev->data->dev_private; uint16_t i; uint16_t n = 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_data *rxq = (*priv->rxqs)[i]; if (!rxq) continue; if (mlx5_rxq_mprq_enabled(rxq)) ++n; } /* Multi-Packet RQ can't be partially configured. */ assert(n == 0 || n == priv->rxqs_n); return n == priv->rxqs_n; } /** * Allocate RX queue elements for Multi-Packet RQ. * * @param rxq_ctrl * Pointer to RX queue structure. * * @return * 0 on success, a negative errno value otherwise and rte_errno is set. */ static int rxq_alloc_elts_mprq(struct mlx5_rxq_ctrl *rxq_ctrl) { struct mlx5_rxq_data *rxq = &rxq_ctrl->rxq; unsigned int wqe_n = 1 << rxq->elts_n; unsigned int i; int err; /* Iterate on segments. */ for (i = 0; i <= wqe_n; ++i) { struct mlx5_mprq_buf *buf; if (rte_mempool_get(rxq->mprq_mp, (void **)&buf) < 0) { DRV_LOG(ERR, "port %u empty mbuf pool", rxq->port_id); rte_errno = ENOMEM; goto error; } if (i < wqe_n) (*rxq->mprq_bufs)[i] = buf; else rxq->mprq_repl = buf; } DRV_LOG(DEBUG, "port %u Rx queue %u allocated and configured %u segments", rxq->port_id, rxq_ctrl->idx, wqe_n); return 0; error: err = rte_errno; /* Save rte_errno before cleanup. */ wqe_n = i; for (i = 0; (i != wqe_n); ++i) { if ((*rxq->mprq_bufs)[i] != NULL) rte_mempool_put(rxq->mprq_mp, (*rxq->mprq_bufs)[i]); (*rxq->mprq_bufs)[i] = NULL; } DRV_LOG(DEBUG, "port %u Rx queue %u failed, freed everything", rxq->port_id, rxq_ctrl->idx); rte_errno = err; /* Restore rte_errno. */ return -rte_errno; } /** * Allocate RX queue elements for Single-Packet RQ. * * @param rxq_ctrl * Pointer to RX queue structure. * * @return * 0 on success, errno value on failure. */ static int rxq_alloc_elts_sprq(struct mlx5_rxq_ctrl *rxq_ctrl) { const unsigned int sges_n = 1 << rxq_ctrl->rxq.sges_n; unsigned int elts_n = 1 << rxq_ctrl->rxq.elts_n; unsigned int i; int err; /* Iterate on segments. */ for (i = 0; (i != elts_n); ++i) { struct rte_mbuf *buf; buf = rte_pktmbuf_alloc(rxq_ctrl->rxq.mp); if (buf == NULL) { DRV_LOG(ERR, "port %u empty mbuf pool", PORT_ID(rxq_ctrl->priv)); rte_errno = ENOMEM; goto error; } /* Headroom is reserved by rte_pktmbuf_alloc(). */ assert(DATA_OFF(buf) == RTE_PKTMBUF_HEADROOM); /* Buffer is supposed to be empty. */ assert(rte_pktmbuf_data_len(buf) == 0); assert(rte_pktmbuf_pkt_len(buf) == 0); assert(!buf->next); /* Only the first segment keeps headroom. */ if (i % sges_n) SET_DATA_OFF(buf, 0); PORT(buf) = rxq_ctrl->rxq.port_id; DATA_LEN(buf) = rte_pktmbuf_tailroom(buf); PKT_LEN(buf) = DATA_LEN(buf); NB_SEGS(buf) = 1; (*rxq_ctrl->rxq.elts)[i] = buf; } /* If Rx vector is activated. */ if (mlx5_rxq_check_vec_support(&rxq_ctrl->rxq) > 0) { struct mlx5_rxq_data *rxq = &rxq_ctrl->rxq; struct rte_mbuf *mbuf_init = &rxq->fake_mbuf; int j; /* Initialize default rearm_data for vPMD. */ mbuf_init->data_off = RTE_PKTMBUF_HEADROOM; rte_mbuf_refcnt_set(mbuf_init, 1); mbuf_init->nb_segs = 1; mbuf_init->port = rxq->port_id; /* * prevent compiler reordering: * rearm_data covers previous fields. */ rte_compiler_barrier(); rxq->mbuf_initializer = *(uint64_t *)&mbuf_init->rearm_data; /* Padding with a fake mbuf for vectorized Rx. */ for (j = 0; j < MLX5_VPMD_DESCS_PER_LOOP; ++j) (*rxq->elts)[elts_n + j] = &rxq->fake_mbuf; } DRV_LOG(DEBUG, "port %u Rx queue %u allocated and configured %u segments" " (max %u packets)", PORT_ID(rxq_ctrl->priv), rxq_ctrl->idx, elts_n, elts_n / (1 << rxq_ctrl->rxq.sges_n)); return 0; error: err = rte_errno; /* Save rte_errno before cleanup. */ elts_n = i; for (i = 0; (i != elts_n); ++i) { if ((*rxq_ctrl->rxq.elts)[i] != NULL) rte_pktmbuf_free_seg((*rxq_ctrl->rxq.elts)[i]); (*rxq_ctrl->rxq.elts)[i] = NULL; } DRV_LOG(DEBUG, "port %u Rx queue %u failed, freed everything", PORT_ID(rxq_ctrl->priv), rxq_ctrl->idx); rte_errno = err; /* Restore rte_errno. */ return -rte_errno; } /** * Allocate RX queue elements. * * @param rxq_ctrl * Pointer to RX queue structure. * * @return * 0 on success, errno value on failure. */ int rxq_alloc_elts(struct mlx5_rxq_ctrl *rxq_ctrl) { return mlx5_rxq_mprq_enabled(&rxq_ctrl->rxq) ? rxq_alloc_elts_mprq(rxq_ctrl) : rxq_alloc_elts_sprq(rxq_ctrl); } /** * Free RX queue elements for Multi-Packet RQ. * * @param rxq_ctrl * Pointer to RX queue structure. */ static void rxq_free_elts_mprq(struct mlx5_rxq_ctrl *rxq_ctrl) { struct mlx5_rxq_data *rxq = &rxq_ctrl->rxq; uint16_t i; DRV_LOG(DEBUG, "port %u Multi-Packet Rx queue %u freeing WRs", rxq->port_id, rxq_ctrl->idx); if (rxq->mprq_bufs == NULL) return; assert(mlx5_rxq_check_vec_support(rxq) < 0); for (i = 0; (i != (1u << rxq->elts_n)); ++i) { if ((*rxq->mprq_bufs)[i] != NULL) mlx5_mprq_buf_free((*rxq->mprq_bufs)[i]); (*rxq->mprq_bufs)[i] = NULL; } if (rxq->mprq_repl != NULL) { mlx5_mprq_buf_free(rxq->mprq_repl); rxq->mprq_repl = NULL; } } /** * Free RX queue elements for Single-Packet RQ. * * @param rxq_ctrl * Pointer to RX queue structure. */ static void rxq_free_elts_sprq(struct mlx5_rxq_ctrl *rxq_ctrl) { struct mlx5_rxq_data *rxq = &rxq_ctrl->rxq; const uint16_t q_n = (1 << rxq->elts_n); const uint16_t q_mask = q_n - 1; uint16_t used = q_n - (rxq->rq_ci - rxq->rq_pi); uint16_t i; DRV_LOG(DEBUG, "port %u Rx queue %u freeing WRs", PORT_ID(rxq_ctrl->priv), rxq_ctrl->idx); if (rxq->elts == NULL) return; /** * Some mbuf in the Ring belongs to the application. They cannot be * freed. */ if (mlx5_rxq_check_vec_support(rxq) > 0) { for (i = 0; i < used; ++i) (*rxq->elts)[(rxq->rq_ci + i) & q_mask] = NULL; rxq->rq_pi = rxq->rq_ci; } for (i = 0; (i != (1u << rxq->elts_n)); ++i) { if ((*rxq->elts)[i] != NULL) rte_pktmbuf_free_seg((*rxq->elts)[i]); (*rxq->elts)[i] = NULL; } } /** * Free RX queue elements. * * @param rxq_ctrl * Pointer to RX queue structure. */ static void rxq_free_elts(struct mlx5_rxq_ctrl *rxq_ctrl) { if (mlx5_rxq_mprq_enabled(&rxq_ctrl->rxq)) rxq_free_elts_mprq(rxq_ctrl); else rxq_free_elts_sprq(rxq_ctrl); } /** * Clean up a RX queue. * * Destroy objects, free allocated memory and reset the structure for reuse. * * @param rxq_ctrl * Pointer to RX queue structure. */ void mlx5_rxq_cleanup(struct mlx5_rxq_ctrl *rxq_ctrl) { DRV_LOG(DEBUG, "port %u cleaning up Rx queue %u", PORT_ID(rxq_ctrl->priv), rxq_ctrl->idx); if (rxq_ctrl->ibv) mlx5_rxq_ibv_release(rxq_ctrl->ibv); memset(rxq_ctrl, 0, sizeof(*rxq_ctrl)); } /** * Returns the per-queue supported offloads. * * @param dev * Pointer to Ethernet device. * * @return * Supported Rx offloads. */ uint64_t mlx5_get_rx_queue_offloads(struct rte_eth_dev *dev) { struct priv *priv = dev->data->dev_private; struct mlx5_dev_config *config = &priv->config; uint64_t offloads = (DEV_RX_OFFLOAD_SCATTER | DEV_RX_OFFLOAD_TIMESTAMP | DEV_RX_OFFLOAD_JUMBO_FRAME); if (config->hw_fcs_strip) offloads |= DEV_RX_OFFLOAD_KEEP_CRC; if (config->hw_csum) offloads |= (DEV_RX_OFFLOAD_IPV4_CKSUM | DEV_RX_OFFLOAD_UDP_CKSUM | DEV_RX_OFFLOAD_TCP_CKSUM); if (config->hw_vlan_strip) offloads |= DEV_RX_OFFLOAD_VLAN_STRIP; return offloads; } /** * Returns the per-port supported offloads. * * @return * Supported Rx offloads. */ uint64_t mlx5_get_rx_port_offloads(void) { uint64_t offloads = DEV_RX_OFFLOAD_VLAN_FILTER; return offloads; } /** * * @param dev * Pointer to Ethernet device structure. * @param idx * RX queue index. * @param desc * Number of descriptors to configure in queue. * @param socket * NUMA socket on which memory must be allocated. * @param[in] conf * Thresholds parameters. * @param mp * Memory pool for buffer allocations. * * @return * 0 on success, a negative errno value otherwise and rte_errno is set. */ 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) { struct priv *priv = dev->data->dev_private; struct mlx5_rxq_data *rxq = (*priv->rxqs)[idx]; struct mlx5_rxq_ctrl *rxq_ctrl = container_of(rxq, struct mlx5_rxq_ctrl, rxq); if (!rte_is_power_of_2(desc)) { desc = 1 << log2above(desc); DRV_LOG(WARNING, "port %u increased number of descriptors in Rx queue %u" " to the next power of two (%d)", dev->data->port_id, idx, desc); } DRV_LOG(DEBUG, "port %u configuring Rx queue %u for %u descriptors", dev->data->port_id, idx, desc); if (idx >= priv->rxqs_n) { DRV_LOG(ERR, "port %u Rx queue index out of range (%u >= %u)", dev->data->port_id, idx, priv->rxqs_n); rte_errno = EOVERFLOW; return -rte_errno; } if (!mlx5_rxq_releasable(dev, idx)) { DRV_LOG(ERR, "port %u unable to release queue index %u", dev->data->port_id, idx); rte_errno = EBUSY; return -rte_errno; } mlx5_rxq_release(dev, idx); rxq_ctrl = mlx5_rxq_new(dev, idx, desc, socket, conf, mp); if (!rxq_ctrl) { DRV_LOG(ERR, "port %u unable to allocate queue index %u", dev->data->port_id, idx); rte_errno = ENOMEM; return -rte_errno; } DRV_LOG(DEBUG, "port %u adding Rx queue %u to list", dev->data->port_id, idx); (*priv->rxqs)[idx] = &rxq_ctrl->rxq; return 0; } /** * DPDK callback to release a RX queue. * * @param dpdk_rxq * Generic RX queue pointer. */ void mlx5_rx_queue_release(void *dpdk_rxq) { struct mlx5_rxq_data *rxq = (struct mlx5_rxq_data *)dpdk_rxq; struct mlx5_rxq_ctrl *rxq_ctrl; struct priv *priv; if (rxq == NULL) return; rxq_ctrl = container_of(rxq, struct mlx5_rxq_ctrl, rxq); priv = rxq_ctrl->priv; if (!mlx5_rxq_releasable(ETH_DEV(priv), rxq_ctrl->rxq.stats.idx)) rte_panic("port %u Rx queue %u is still used by a flow and" " cannot be removed\n", PORT_ID(priv), rxq_ctrl->idx); mlx5_rxq_release(ETH_DEV(priv), rxq_ctrl->rxq.stats.idx); } /** * Allocate queue vector and fill epoll fd list for Rx interrupts. * * @param dev * Pointer to Ethernet device. * * @return * 0 on success, a negative errno value otherwise and rte_errno is set. */ int mlx5_rx_intr_vec_enable(struct rte_eth_dev *dev) { struct priv *priv = dev->data->dev_private; unsigned int i; unsigned int rxqs_n = priv->rxqs_n; unsigned int n = RTE_MIN(rxqs_n, (uint32_t)RTE_MAX_RXTX_INTR_VEC_ID); unsigned int count = 0; struct rte_intr_handle *intr_handle = dev->intr_handle; if (!dev->data->dev_conf.intr_conf.rxq) return 0; mlx5_rx_intr_vec_disable(dev); intr_handle->intr_vec = malloc(n * sizeof(intr_handle->intr_vec[0])); if (intr_handle->intr_vec == NULL) { DRV_LOG(ERR, "port %u failed to allocate memory for interrupt" " vector, Rx interrupts will not be supported", dev->data->port_id); rte_errno = ENOMEM; return -rte_errno; } intr_handle->type = RTE_INTR_HANDLE_EXT; for (i = 0; i != n; ++i) { /* This rxq ibv must not be released in this function. */ struct mlx5_rxq_ibv *rxq_ibv = mlx5_rxq_ibv_get(dev, i); int fd; int flags; int rc; /* Skip queues that cannot request interrupts. */ if (!rxq_ibv || !rxq_ibv->channel) { /* Use invalid intr_vec[] index to disable entry. */ intr_handle->intr_vec[i] = RTE_INTR_VEC_RXTX_OFFSET + RTE_MAX_RXTX_INTR_VEC_ID; continue; } if (count >= RTE_MAX_RXTX_INTR_VEC_ID) { DRV_LOG(ERR, "port %u too many Rx queues for interrupt" " vector size (%d), Rx interrupts cannot be" " enabled", dev->data->port_id, RTE_MAX_RXTX_INTR_VEC_ID); mlx5_rx_intr_vec_disable(dev); rte_errno = ENOMEM; return -rte_errno; } fd = rxq_ibv->channel->fd; flags = fcntl(fd, F_GETFL); rc = fcntl(fd, F_SETFL, flags | O_NONBLOCK); if (rc < 0) { rte_errno = errno; DRV_LOG(ERR, "port %u failed to make Rx interrupt file" " descriptor %d non-blocking for queue index" " %d", dev->data->port_id, fd, i); mlx5_rx_intr_vec_disable(dev); return -rte_errno; } intr_handle->intr_vec[i] = RTE_INTR_VEC_RXTX_OFFSET + count; intr_handle->efds[count] = fd; count++; } if (!count) mlx5_rx_intr_vec_disable(dev); else intr_handle->nb_efd = count; return 0; } /** * Clean up Rx interrupts handler. * * @param dev * Pointer to Ethernet device. */ void mlx5_rx_intr_vec_disable(struct rte_eth_dev *dev) { struct priv *priv = dev->data->dev_private; struct rte_intr_handle *intr_handle = dev->intr_handle; unsigned int i; unsigned int rxqs_n = priv->rxqs_n; unsigned int n = RTE_MIN(rxqs_n, (uint32_t)RTE_MAX_RXTX_INTR_VEC_ID); if (!dev->data->dev_conf.intr_conf.rxq) return; if (!intr_handle->intr_vec) goto free; for (i = 0; i != n; ++i) { struct mlx5_rxq_ctrl *rxq_ctrl; struct mlx5_rxq_data *rxq_data; if (intr_handle->intr_vec[i] == RTE_INTR_VEC_RXTX_OFFSET + RTE_MAX_RXTX_INTR_VEC_ID) continue; /** * Need to access directly the queue to release the reference * kept in priv_rx_intr_vec_enable(). */ rxq_data = (*priv->rxqs)[i]; rxq_ctrl = container_of(rxq_data, struct mlx5_rxq_ctrl, rxq); mlx5_rxq_ibv_release(rxq_ctrl->ibv); } free: rte_intr_free_epoll_fd(intr_handle); if (intr_handle->intr_vec) free(intr_handle->intr_vec); intr_handle->nb_efd = 0; intr_handle->intr_vec = NULL; } /** * MLX5 CQ notification . * * @param rxq * Pointer to receive queue structure. * @param sq_n_rxq * Sequence number per receive queue . */ static inline void mlx5_arm_cq(struct mlx5_rxq_data *rxq, int sq_n_rxq) { int sq_n = 0; uint32_t doorbell_hi; uint64_t doorbell; void *cq_db_reg = (char *)rxq->cq_uar + MLX5_CQ_DOORBELL; sq_n = sq_n_rxq & MLX5_CQ_SQN_MASK; doorbell_hi = sq_n << MLX5_CQ_SQN_OFFSET | (rxq->cq_ci & MLX5_CI_MASK); doorbell = (uint64_t)doorbell_hi << 32; doorbell |= rxq->cqn; rxq->cq_db[MLX5_CQ_ARM_DB] = rte_cpu_to_be_32(doorbell_hi); mlx5_uar_write64(rte_cpu_to_be_64(doorbell), cq_db_reg, rxq->uar_lock_cq); } /** * DPDK callback for Rx queue interrupt enable. * * @param dev * Pointer to Ethernet device structure. * @param rx_queue_id * Rx queue number. * * @return * 0 on success, a negative errno value otherwise and rte_errno is set. */ int mlx5_rx_intr_enable(struct rte_eth_dev *dev, uint16_t rx_queue_id) { struct priv *priv = dev->data->dev_private; struct mlx5_rxq_data *rxq_data; struct mlx5_rxq_ctrl *rxq_ctrl; rxq_data = (*priv->rxqs)[rx_queue_id]; if (!rxq_data) { rte_errno = EINVAL; return -rte_errno; } rxq_ctrl = container_of(rxq_data, struct mlx5_rxq_ctrl, rxq); if (rxq_ctrl->irq) { struct mlx5_rxq_ibv *rxq_ibv; rxq_ibv = mlx5_rxq_ibv_get(dev, rx_queue_id); if (!rxq_ibv) { rte_errno = EINVAL; return -rte_errno; } mlx5_arm_cq(rxq_data, rxq_data->cq_arm_sn); mlx5_rxq_ibv_release(rxq_ibv); } return 0; } /** * DPDK callback for Rx queue interrupt disable. * * @param dev * Pointer to Ethernet device structure. * @param rx_queue_id * Rx queue number. * * @return * 0 on success, a negative errno value otherwise and rte_errno is set. */ int mlx5_rx_intr_disable(struct rte_eth_dev *dev, uint16_t rx_queue_id) { struct priv *priv = dev->data->dev_private; struct mlx5_rxq_data *rxq_data; struct mlx5_rxq_ctrl *rxq_ctrl; struct mlx5_rxq_ibv *rxq_ibv = NULL; struct ibv_cq *ev_cq; void *ev_ctx; int ret; rxq_data = (*priv->rxqs)[rx_queue_id]; if (!rxq_data) { rte_errno = EINVAL; return -rte_errno; } rxq_ctrl = container_of(rxq_data, struct mlx5_rxq_ctrl, rxq); if (!rxq_ctrl->irq) return 0; rxq_ibv = mlx5_rxq_ibv_get(dev, rx_queue_id); if (!rxq_ibv) { rte_errno = EINVAL; return -rte_errno; } ret = mlx5_glue->get_cq_event(rxq_ibv->channel, &ev_cq, &ev_ctx); if (ret || ev_cq != rxq_ibv->cq) { rte_errno = EINVAL; goto exit; } rxq_data->cq_arm_sn++; mlx5_glue->ack_cq_events(rxq_ibv->cq, 1); return 0; exit: ret = rte_errno; /* Save rte_errno before cleanup. */ if (rxq_ibv) mlx5_rxq_ibv_release(rxq_ibv); DRV_LOG(WARNING, "port %u unable to disable interrupt on Rx queue %d", dev->data->port_id, rx_queue_id); rte_errno = ret; /* Restore rte_errno. */ return -rte_errno; } /** * Create the Rx queue Verbs object. * * @param dev * Pointer to Ethernet device. * @param idx * Queue index in DPDK Rx queue array * * @return * The Verbs object initialised, NULL otherwise and rte_errno is set. */ struct mlx5_rxq_ibv * mlx5_rxq_ibv_new(struct rte_eth_dev *dev, uint16_t idx) { struct priv *priv = dev->data->dev_private; struct mlx5_rxq_data *rxq_data = (*priv->rxqs)[idx]; struct mlx5_rxq_ctrl *rxq_ctrl = container_of(rxq_data, struct mlx5_rxq_ctrl, rxq); struct ibv_wq_attr mod; union { struct { struct ibv_cq_init_attr_ex ibv; struct mlx5dv_cq_init_attr mlx5; } cq; struct { struct ibv_wq_init_attr ibv; #ifdef HAVE_IBV_DEVICE_STRIDING_RQ_SUPPORT struct mlx5dv_wq_init_attr mlx5; #endif } wq; struct ibv_cq_ex cq_attr; } attr; unsigned int cqe_n; unsigned int wqe_n = 1 << rxq_data->elts_n; struct mlx5_rxq_ibv *tmpl; struct mlx5dv_cq cq_info; struct mlx5dv_rwq rwq; unsigned int i; int ret = 0; struct mlx5dv_obj obj; struct mlx5_dev_config *config = &priv->config; const int mprq_en = mlx5_rxq_mprq_enabled(rxq_data); assert(rxq_data); assert(!rxq_ctrl->ibv); priv->verbs_alloc_ctx.type = MLX5_VERBS_ALLOC_TYPE_RX_QUEUE; priv->verbs_alloc_ctx.obj = rxq_ctrl; tmpl = rte_calloc_socket(__func__, 1, sizeof(*tmpl), 0, rxq_ctrl->socket); if (!tmpl) { DRV_LOG(ERR, "port %u Rx queue %u cannot allocate verbs resources", dev->data->port_id, rxq_ctrl->idx); rte_errno = ENOMEM; goto error; } tmpl->rxq_ctrl = rxq_ctrl; if (rxq_ctrl->irq) { tmpl->channel = mlx5_glue->create_comp_channel(priv->ctx); if (!tmpl->channel) { DRV_LOG(ERR, "port %u: comp channel creation failure", dev->data->port_id); rte_errno = ENOMEM; goto error; } } if (mprq_en) cqe_n = wqe_n * (1 << rxq_data->strd_num_n) - 1; else cqe_n = wqe_n - 1; attr.cq.ibv = (struct ibv_cq_init_attr_ex){ .cqe = cqe_n, .channel = tmpl->channel, .comp_mask = 0, }; attr.cq.mlx5 = (struct mlx5dv_cq_init_attr){ .comp_mask = 0, }; if (config->cqe_comp && !rxq_data->hw_timestamp) { attr.cq.mlx5.comp_mask |= MLX5DV_CQ_INIT_ATTR_MASK_COMPRESSED_CQE; #ifdef HAVE_IBV_DEVICE_STRIDING_RQ_SUPPORT attr.cq.mlx5.cqe_comp_res_format = mprq_en ? MLX5DV_CQE_RES_FORMAT_CSUM_STRIDX : MLX5DV_CQE_RES_FORMAT_HASH; #else attr.cq.mlx5.cqe_comp_res_format = MLX5DV_CQE_RES_FORMAT_HASH; #endif /* * For vectorized Rx, it must not be doubled in order to * make cq_ci and rq_ci aligned. */ if (mlx5_rxq_check_vec_support(rxq_data) < 0) attr.cq.ibv.cqe *= 2; } else if (config->cqe_comp && rxq_data->hw_timestamp) { DRV_LOG(DEBUG, "port %u Rx CQE compression is disabled for HW" " timestamp", dev->data->port_id); } #ifdef HAVE_IBV_MLX5_MOD_CQE_128B_PAD if (config->cqe_pad) { attr.cq.mlx5.comp_mask |= MLX5DV_CQ_INIT_ATTR_MASK_FLAGS; attr.cq.mlx5.flags |= MLX5DV_CQ_INIT_ATTR_FLAGS_CQE_PAD; } #endif tmpl->cq = mlx5_glue->cq_ex_to_cq (mlx5_glue->dv_create_cq(priv->ctx, &attr.cq.ibv, &attr.cq.mlx5)); if (tmpl->cq == NULL) { DRV_LOG(ERR, "port %u Rx queue %u CQ creation failure", dev->data->port_id, idx); rte_errno = ENOMEM; goto error; } DRV_LOG(DEBUG, "port %u priv->device_attr.max_qp_wr is %d", dev->data->port_id, priv->device_attr.orig_attr.max_qp_wr); DRV_LOG(DEBUG, "port %u priv->device_attr.max_sge is %d", dev->data->port_id, priv->device_attr.orig_attr.max_sge); attr.wq.ibv = (struct ibv_wq_init_attr){ .wq_context = NULL, /* Could be useful in the future. */ .wq_type = IBV_WQT_RQ, /* Max number of outstanding WRs. */ .max_wr = wqe_n >> rxq_data->sges_n, /* Max number of scatter/gather elements in a WR. */ .max_sge = 1 << rxq_data->sges_n, .pd = priv->pd, .cq = tmpl->cq, .comp_mask = IBV_WQ_FLAGS_CVLAN_STRIPPING | 0, .create_flags = (rxq_data->vlan_strip ? IBV_WQ_FLAGS_CVLAN_STRIPPING : 0), }; /* By default, FCS (CRC) is stripped by hardware. */ if (rxq_data->crc_present) { attr.wq.ibv.create_flags |= IBV_WQ_FLAGS_SCATTER_FCS; attr.wq.ibv.comp_mask |= IBV_WQ_INIT_ATTR_FLAGS; } #ifdef HAVE_IBV_WQ_FLAG_RX_END_PADDING if (config->hw_padding) { attr.wq.ibv.create_flags |= IBV_WQ_FLAG_RX_END_PADDING; attr.wq.ibv.comp_mask |= IBV_WQ_INIT_ATTR_FLAGS; } #endif #ifdef HAVE_IBV_DEVICE_STRIDING_RQ_SUPPORT attr.wq.mlx5 = (struct mlx5dv_wq_init_attr){ .comp_mask = 0, }; if (mprq_en) { struct mlx5dv_striding_rq_init_attr *mprq_attr = &attr.wq.mlx5.striding_rq_attrs; attr.wq.mlx5.comp_mask |= MLX5DV_WQ_INIT_ATTR_MASK_STRIDING_RQ; *mprq_attr = (struct mlx5dv_striding_rq_init_attr){ .single_stride_log_num_of_bytes = rxq_data->strd_sz_n, .single_wqe_log_num_of_strides = rxq_data->strd_num_n, .two_byte_shift_en = MLX5_MPRQ_TWO_BYTE_SHIFT, }; } tmpl->wq = mlx5_glue->dv_create_wq(priv->ctx, &attr.wq.ibv, &attr.wq.mlx5); #else tmpl->wq = mlx5_glue->create_wq(priv->ctx, &attr.wq.ibv); #endif if (tmpl->wq == NULL) { DRV_LOG(ERR, "port %u Rx queue %u WQ creation failure", dev->data->port_id, idx); rte_errno = ENOMEM; goto error; } /* * Make sure number of WRs*SGEs match expectations since a queue * cannot allocate more than "desc" buffers. */ if (attr.wq.ibv.max_wr != (wqe_n >> rxq_data->sges_n) || attr.wq.ibv.max_sge != (1u << rxq_data->sges_n)) { DRV_LOG(ERR, "port %u Rx queue %u requested %u*%u but got %u*%u" " WRs*SGEs", dev->data->port_id, idx, wqe_n >> rxq_data->sges_n, (1 << rxq_data->sges_n), attr.wq.ibv.max_wr, attr.wq.ibv.max_sge); rte_errno = EINVAL; goto error; } /* Change queue state to ready. */ mod = (struct ibv_wq_attr){ .attr_mask = IBV_WQ_ATTR_STATE, .wq_state = IBV_WQS_RDY, }; ret = mlx5_glue->modify_wq(tmpl->wq, &mod); if (ret) { DRV_LOG(ERR, "port %u Rx queue %u WQ state to IBV_WQS_RDY failed", dev->data->port_id, idx); rte_errno = ret; goto error; } obj.cq.in = tmpl->cq; obj.cq.out = &cq_info; obj.rwq.in = tmpl->wq; obj.rwq.out = &rwq; ret = mlx5_glue->dv_init_obj(&obj, MLX5DV_OBJ_CQ | MLX5DV_OBJ_RWQ); if (ret) { rte_errno = ret; goto error; } if (cq_info.cqe_size != RTE_CACHE_LINE_SIZE) { DRV_LOG(ERR, "port %u wrong MLX5_CQE_SIZE environment variable" " value: it should be set to %u", dev->data->port_id, RTE_CACHE_LINE_SIZE); rte_errno = EINVAL; goto error; } /* Fill the rings. */ rxq_data->wqes = rwq.buf; for (i = 0; (i != wqe_n); ++i) { volatile struct mlx5_wqe_data_seg *scat; uintptr_t addr; uint32_t byte_count; if (mprq_en) { struct mlx5_mprq_buf *buf = (*rxq_data->mprq_bufs)[i]; scat = &((volatile struct mlx5_wqe_mprq *) rxq_data->wqes)[i].dseg; addr = (uintptr_t)mlx5_mprq_buf_addr(buf); byte_count = (1 << rxq_data->strd_sz_n) * (1 << rxq_data->strd_num_n); } else { struct rte_mbuf *buf = (*rxq_data->elts)[i]; scat = &((volatile struct mlx5_wqe_data_seg *) rxq_data->wqes)[i]; addr = rte_pktmbuf_mtod(buf, uintptr_t); byte_count = DATA_LEN(buf); } /* 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_data, addr), }; } rxq_data->rq_db = rwq.dbrec; rxq_data->cqe_n = log2above(cq_info.cqe_cnt); rxq_data->cq_ci = 0; rxq_data->consumed_strd = 0; rxq_data->rq_pi = 0; rxq_data->zip = (struct rxq_zip){ .ai = 0, }; rxq_data->cq_db = cq_info.dbrec; rxq_data->cqes = (volatile struct mlx5_cqe (*)[])(uintptr_t)cq_info.buf; rxq_data->cq_uar = cq_info.cq_uar; rxq_data->cqn = cq_info.cqn; rxq_data->cq_arm_sn = 0; /* Update doorbell counter. */ rxq_data->rq_ci = wqe_n >> rxq_data->sges_n; rte_wmb(); *rxq_data->rq_db = rte_cpu_to_be_32(rxq_data->rq_ci); DRV_LOG(DEBUG, "port %u rxq %u updated with %p", dev->data->port_id, idx, (void *)&tmpl); rte_atomic32_inc(&tmpl->refcnt); LIST_INSERT_HEAD(&priv->rxqsibv, tmpl, next); priv->verbs_alloc_ctx.type = MLX5_VERBS_ALLOC_TYPE_NONE; return tmpl; error: ret = rte_errno; /* Save rte_errno before cleanup. */ if (tmpl->wq) claim_zero(mlx5_glue->destroy_wq(tmpl->wq)); if (tmpl->cq) claim_zero(mlx5_glue->destroy_cq(tmpl->cq)); if (tmpl->channel) claim_zero(mlx5_glue->destroy_comp_channel(tmpl->channel)); priv->verbs_alloc_ctx.type = MLX5_VERBS_ALLOC_TYPE_NONE; rte_errno = ret; /* Restore rte_errno. */ return NULL; } /** * Get an Rx queue Verbs object. * * @param dev * Pointer to Ethernet device. * @param idx * Queue index in DPDK Rx queue array * * @return * The Verbs object if it exists. */ struct mlx5_rxq_ibv * mlx5_rxq_ibv_get(struct rte_eth_dev *dev, uint16_t idx) { struct priv *priv = dev->data->dev_private; struct mlx5_rxq_data *rxq_data = (*priv->rxqs)[idx]; struct mlx5_rxq_ctrl *rxq_ctrl; if (idx >= priv->rxqs_n) return NULL; if (!rxq_data) return NULL; rxq_ctrl = container_of(rxq_data, struct mlx5_rxq_ctrl, rxq); if (rxq_ctrl->ibv) { rte_atomic32_inc(&rxq_ctrl->ibv->refcnt); } return rxq_ctrl->ibv; } /** * Release an Rx verbs queue object. * * @param rxq_ibv * Verbs Rx queue object. * * @return * 1 while a reference on it exists, 0 when freed. */ int mlx5_rxq_ibv_release(struct mlx5_rxq_ibv *rxq_ibv) { assert(rxq_ibv); assert(rxq_ibv->wq); assert(rxq_ibv->cq); if (rte_atomic32_dec_and_test(&rxq_ibv->refcnt)) { rxq_free_elts(rxq_ibv->rxq_ctrl); claim_zero(mlx5_glue->destroy_wq(rxq_ibv->wq)); claim_zero(mlx5_glue->destroy_cq(rxq_ibv->cq)); if (rxq_ibv->channel) claim_zero(mlx5_glue->destroy_comp_channel (rxq_ibv->channel)); LIST_REMOVE(rxq_ibv, next); rte_free(rxq_ibv); return 0; } return 1; } /** * Verify the Verbs Rx queue list is empty * * @param dev * Pointer to Ethernet device. * * @return * The number of object not released. */ int mlx5_rxq_ibv_verify(struct rte_eth_dev *dev) { struct priv *priv = dev->data->dev_private; int ret = 0; struct mlx5_rxq_ibv *rxq_ibv; LIST_FOREACH(rxq_ibv, &priv->rxqsibv, next) { DRV_LOG(DEBUG, "port %u Verbs Rx queue %u still referenced", dev->data->port_id, rxq_ibv->rxq_ctrl->idx); ++ret; } return ret; } /** * Return true if a single reference exists on the object. * * @param rxq_ibv * Verbs Rx queue object. */ int mlx5_rxq_ibv_releasable(struct mlx5_rxq_ibv *rxq_ibv) { assert(rxq_ibv); return (rte_atomic32_read(&rxq_ibv->refcnt) == 1); } /** * Callback function to initialize mbufs for Multi-Packet RQ. */ static inline void mlx5_mprq_buf_init(struct rte_mempool *mp, void *opaque_arg __rte_unused, void *_m, unsigned int i __rte_unused) { struct mlx5_mprq_buf *buf = _m; memset(_m, 0, sizeof(*buf)); buf->mp = mp; rte_atomic16_set(&buf->refcnt, 1); } /** * Free mempool of Multi-Packet RQ. * * @param dev * Pointer to Ethernet device. * * @return * 0 on success, negative errno value on failure. */ int mlx5_mprq_free_mp(struct rte_eth_dev *dev) { struct priv *priv = dev->data->dev_private; struct rte_mempool *mp = priv->mprq_mp; unsigned int i; if (mp == NULL) return 0; DRV_LOG(DEBUG, "port %u freeing mempool (%s) for Multi-Packet RQ", dev->data->port_id, mp->name); /* * If a buffer in the pool has been externally attached to a mbuf and it * is still in use by application, destroying the Rx qeueue can spoil * the packet. It is unlikely to happen but if application dynamically * creates and destroys with holding Rx packets, this can happen. * * TODO: It is unavoidable for now because the mempool for Multi-Packet * RQ isn't provided by application but managed by PMD. */ if (!rte_mempool_full(mp)) { DRV_LOG(ERR, "port %u mempool for Multi-Packet RQ is still in use", dev->data->port_id); rte_errno = EBUSY; return -rte_errno; } rte_mempool_free(mp); /* Unset mempool for each Rx queue. */ for (i = 0; i != priv->rxqs_n; ++i) { struct mlx5_rxq_data *rxq = (*priv->rxqs)[i]; if (rxq == NULL) continue; rxq->mprq_mp = NULL; } priv->mprq_mp = NULL; return 0; } /** * Allocate a mempool for Multi-Packet RQ. All configured Rx queues share the * mempool. If already allocated, reuse it if there're enough elements. * Otherwise, resize it. * * @param dev * Pointer to Ethernet device. * * @return * 0 on success, negative errno value on failure. */ int mlx5_mprq_alloc_mp(struct rte_eth_dev *dev) { struct priv *priv = dev->data->dev_private; struct rte_mempool *mp = priv->mprq_mp; char name[RTE_MEMPOOL_NAMESIZE]; unsigned int desc = 0; unsigned int buf_len; unsigned int obj_num; unsigned int obj_size; unsigned int strd_num_n = 0; unsigned int strd_sz_n = 0; unsigned int i; if (!mlx5_mprq_enabled(dev)) return 0; /* Count the total number of descriptors configured. */ for (i = 0; i != priv->rxqs_n; ++i) { struct mlx5_rxq_data *rxq = (*priv->rxqs)[i]; if (rxq == NULL) continue; desc += 1 << rxq->elts_n; /* Get the max number of strides. */ if (strd_num_n < rxq->strd_num_n) strd_num_n = rxq->strd_num_n; /* Get the max size of a stride. */ if (strd_sz_n < rxq->strd_sz_n) strd_sz_n = rxq->strd_sz_n; } assert(strd_num_n && strd_sz_n); buf_len = (1 << strd_num_n) * (1 << strd_sz_n); obj_size = buf_len + sizeof(struct mlx5_mprq_buf); /* * Received packets can be either memcpy'd or externally referenced. In * case that the packet is attached to an mbuf as an external buffer, as * it isn't possible to predict how the buffers will be queued by * application, there's no option to exactly pre-allocate needed buffers * in advance but to speculatively prepares enough buffers. * * In the data path, if this Mempool is depleted, PMD will try to memcpy * received packets to buffers provided by application (rxq->mp) until * this Mempool gets available again. */ desc *= 4; obj_num = desc + MLX5_MPRQ_MP_CACHE_SZ * priv->rxqs_n; /* * rte_mempool_create_empty() has sanity check to refuse large cache * size compared to the number of elements. * CACHE_FLUSHTHRESH_MULTIPLIER is defined in a C file, so using a * constant number 2 instead. */ obj_num = RTE_MAX(obj_num, MLX5_MPRQ_MP_CACHE_SZ * 2); /* Check a mempool is already allocated and if it can be resued. */ if (mp != NULL && mp->elt_size >= obj_size && mp->size >= obj_num) { DRV_LOG(DEBUG, "port %u mempool %s is being reused", dev->data->port_id, mp->name); /* Reuse. */ goto exit; } else if (mp != NULL) { DRV_LOG(DEBUG, "port %u mempool %s should be resized, freeing it", dev->data->port_id, mp->name); /* * If failed to free, which means it may be still in use, no way * but to keep using the existing one. On buffer underrun, * packets will be memcpy'd instead of external buffer * attachment. */ if (mlx5_mprq_free_mp(dev)) { if (mp->elt_size >= obj_size) goto exit; else return -rte_errno; } } snprintf(name, sizeof(name), "%s-mprq", dev->device->name); mp = rte_mempool_create(name, obj_num, obj_size, MLX5_MPRQ_MP_CACHE_SZ, 0, NULL, NULL, mlx5_mprq_buf_init, NULL, dev->device->numa_node, 0); if (mp == NULL) { DRV_LOG(ERR, "port %u failed to allocate a mempool for" " Multi-Packet RQ, count=%u, size=%u", dev->data->port_id, obj_num, obj_size); rte_errno = ENOMEM; return -rte_errno; } priv->mprq_mp = mp; exit: /* Set mempool for each Rx queue. */ for (i = 0; i != priv->rxqs_n; ++i) { struct mlx5_rxq_data *rxq = (*priv->rxqs)[i]; if (rxq == NULL) continue; rxq->mprq_mp = mp; } DRV_LOG(INFO, "port %u Multi-Packet RQ is configured", dev->data->port_id); return 0; } /** * Create a DPDK Rx queue. * * @param dev * Pointer to Ethernet device. * @param idx * RX queue index. * @param desc * Number of descriptors to configure in queue. * @param socket * NUMA socket on which memory must be allocated. * * @return * A DPDK queue object on success, NULL otherwise and rte_errno is set. */ struct mlx5_rxq_ctrl * mlx5_rxq_new(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc, unsigned int socket, const struct rte_eth_rxconf *conf, struct rte_mempool *mp) { struct priv *priv = dev->data->dev_private; struct mlx5_rxq_ctrl *tmpl; unsigned int mb_len = rte_pktmbuf_data_room_size(mp); unsigned int mprq_stride_size; struct mlx5_dev_config *config = &priv->config; /* * Always allocate extra slots, even if eventually * the vector Rx will not be used. */ uint16_t desc_n = desc + config->rx_vec_en * MLX5_VPMD_DESCS_PER_LOOP; uint64_t offloads = conf->offloads | dev->data->dev_conf.rxmode.offloads; const int mprq_en = mlx5_check_mprq_support(dev) > 0; tmpl = rte_calloc_socket("RXQ", 1, sizeof(*tmpl) + desc_n * sizeof(struct rte_mbuf *), 0, socket); if (!tmpl) { rte_errno = ENOMEM; return NULL; } if (mlx5_mr_btree_init(&tmpl->rxq.mr_ctrl.cache_bh, MLX5_MR_BTREE_CACHE_N, socket)) { /* rte_errno is already set. */ goto error; } tmpl->socket = socket; if (dev->data->dev_conf.intr_conf.rxq) tmpl->irq = 1; /* * This Rx queue can be configured as a Multi-Packet RQ if all of the * following conditions are met: * - MPRQ is enabled. * - The number of descs is more than the number of strides. * - max_rx_pkt_len plus overhead is less than the max size of a * stride. * Otherwise, enable Rx scatter if necessary. */ assert(mb_len >= RTE_PKTMBUF_HEADROOM); mprq_stride_size = dev->data->dev_conf.rxmode.max_rx_pkt_len + sizeof(struct rte_mbuf_ext_shared_info) + RTE_PKTMBUF_HEADROOM; if (mprq_en && desc > (1U << config->mprq.stride_num_n) && mprq_stride_size <= (1U << config->mprq.max_stride_size_n)) { /* TODO: Rx scatter isn't supported yet. */ tmpl->rxq.sges_n = 0; /* Trim the number of descs needed. */ desc >>= config->mprq.stride_num_n; tmpl->rxq.strd_num_n = config->mprq.stride_num_n; tmpl->rxq.strd_sz_n = RTE_MAX(log2above(mprq_stride_size), config->mprq.min_stride_size_n); tmpl->rxq.strd_shift_en = MLX5_MPRQ_TWO_BYTE_SHIFT; tmpl->rxq.mprq_max_memcpy_len = RTE_MIN(mb_len - RTE_PKTMBUF_HEADROOM, config->mprq.max_memcpy_len); DRV_LOG(DEBUG, "port %u Rx queue %u: Multi-Packet RQ is enabled" " strd_num_n = %u, strd_sz_n = %u", dev->data->port_id, idx, tmpl->rxq.strd_num_n, tmpl->rxq.strd_sz_n); } else if (dev->data->dev_conf.rxmode.max_rx_pkt_len <= (mb_len - RTE_PKTMBUF_HEADROOM)) { tmpl->rxq.sges_n = 0; } else if (offloads & DEV_RX_OFFLOAD_SCATTER) { unsigned int size = RTE_PKTMBUF_HEADROOM + dev->data->dev_conf.rxmode.max_rx_pkt_len; unsigned int sges_n; /* * Determine the number of SGEs needed for a full packet * and round it to the next power of two. */ sges_n = log2above((size / mb_len) + !!(size % mb_len)); tmpl->rxq.sges_n = sges_n; /* Make sure rxq.sges_n did not overflow. */ size = mb_len * (1 << tmpl->rxq.sges_n); size -= RTE_PKTMBUF_HEADROOM; if (size < dev->data->dev_conf.rxmode.max_rx_pkt_len) { DRV_LOG(ERR, "port %u too many SGEs (%u) needed to handle" " requested maximum packet size %u", dev->data->port_id, 1 << sges_n, dev->data->dev_conf.rxmode.max_rx_pkt_len); rte_errno = EOVERFLOW; goto error; } } else { DRV_LOG(WARNING, "port %u the requested maximum Rx packet size (%u) is" " larger than a single mbuf (%u) and scattered mode has" " not been requested", dev->data->port_id, dev->data->dev_conf.rxmode.max_rx_pkt_len, mb_len - RTE_PKTMBUF_HEADROOM); } if (mprq_en && !mlx5_rxq_mprq_enabled(&tmpl->rxq)) DRV_LOG(WARNING, "port %u MPRQ is requested but cannot be enabled" " (requested: desc = %u, stride_sz = %u," " supported: min_stride_num = %u, max_stride_sz = %u).", dev->data->port_id, desc, mprq_stride_size, (1 << config->mprq.stride_num_n), (1 << config->mprq.max_stride_size_n)); DRV_LOG(DEBUG, "port %u maximum number of segments per packet: %u", dev->data->port_id, 1 << tmpl->rxq.sges_n); if (desc % (1 << tmpl->rxq.sges_n)) { DRV_LOG(ERR, "port %u number of Rx queue descriptors (%u) is not a" " multiple of SGEs per packet (%u)", dev->data->port_id, desc, 1 << tmpl->rxq.sges_n); rte_errno = EINVAL; goto error; } /* Toggle RX checksum offload if hardware supports it. */ tmpl->rxq.csum = !!(offloads & DEV_RX_OFFLOAD_CHECKSUM); tmpl->rxq.hw_timestamp = !!(offloads & DEV_RX_OFFLOAD_TIMESTAMP); /* Configure VLAN stripping. */ tmpl->rxq.vlan_strip = !!(offloads & DEV_RX_OFFLOAD_VLAN_STRIP); /* By default, FCS (CRC) is stripped by hardware. */ tmpl->rxq.crc_present = 0; if (offloads & DEV_RX_OFFLOAD_KEEP_CRC) { if (config->hw_fcs_strip) { tmpl->rxq.crc_present = 1; } else { DRV_LOG(WARNING, "port %u CRC stripping has been disabled but will" " still be performed by hardware, make sure MLNX_OFED" " and firmware are up to date", dev->data->port_id); } } DRV_LOG(DEBUG, "port %u CRC stripping is %s, %u bytes will be subtracted from" " incoming frames to hide it", dev->data->port_id, tmpl->rxq.crc_present ? "disabled" : "enabled", tmpl->rxq.crc_present << 2); /* Save port ID. */ tmpl->rxq.rss_hash = !!priv->rss_conf.rss_hf && (!!(dev->data->dev_conf.rxmode.mq_mode & ETH_MQ_RX_RSS)); tmpl->rxq.port_id = dev->data->port_id; tmpl->priv = priv; tmpl->rxq.mp = mp; tmpl->rxq.stats.idx = idx; tmpl->rxq.elts_n = log2above(desc); tmpl->rxq.rq_repl_thresh = MLX5_VPMD_RXQ_RPLNSH_THRESH(1 << tmpl->rxq.elts_n); tmpl->rxq.elts = (struct rte_mbuf *(*)[1 << tmpl->rxq.elts_n])(tmpl + 1); #ifndef RTE_ARCH_64 tmpl->rxq.uar_lock_cq = &priv->uar_lock_cq; #endif tmpl->idx = idx; rte_atomic32_inc(&tmpl->refcnt); LIST_INSERT_HEAD(&priv->rxqsctrl, tmpl, next); return tmpl; error: rte_free(tmpl); return NULL; } /** * Get a Rx queue. * * @param dev * Pointer to Ethernet device. * @param idx * TX queue index. * * @return * A pointer to the queue if it exists, NULL otherwise. */ struct mlx5_rxq_ctrl * mlx5_rxq_get(struct rte_eth_dev *dev, uint16_t idx) { struct priv *priv = dev->data->dev_private; struct mlx5_rxq_ctrl *rxq_ctrl = NULL; if ((*priv->rxqs)[idx]) { rxq_ctrl = container_of((*priv->rxqs)[idx], struct mlx5_rxq_ctrl, rxq); mlx5_rxq_ibv_get(dev, idx); rte_atomic32_inc(&rxq_ctrl->refcnt); } return rxq_ctrl; } /** * Release a Rx queue. * * @param dev * Pointer to Ethernet device. * @param idx * TX queue index. * * @return * 1 while a reference on it exists, 0 when freed. */ int mlx5_rxq_release(struct rte_eth_dev *dev, uint16_t idx) { struct priv *priv = dev->data->dev_private; struct mlx5_rxq_ctrl *rxq_ctrl; if (!(*priv->rxqs)[idx]) return 0; rxq_ctrl = container_of((*priv->rxqs)[idx], struct mlx5_rxq_ctrl, rxq); assert(rxq_ctrl->priv); if (rxq_ctrl->ibv && !mlx5_rxq_ibv_release(rxq_ctrl->ibv)) rxq_ctrl->ibv = NULL; if (rte_atomic32_dec_and_test(&rxq_ctrl->refcnt)) { mlx5_mr_btree_free(&rxq_ctrl->rxq.mr_ctrl.cache_bh); LIST_REMOVE(rxq_ctrl, next); rte_free(rxq_ctrl); (*priv->rxqs)[idx] = NULL; return 0; } return 1; } /** * Verify if the queue can be released. * * @param dev * Pointer to Ethernet device. * @param idx * TX queue index. * * @return * 1 if the queue can be released, negative errno otherwise and rte_errno is * set. */ int mlx5_rxq_releasable(struct rte_eth_dev *dev, uint16_t idx) { struct priv *priv = dev->data->dev_private; struct mlx5_rxq_ctrl *rxq_ctrl; if (!(*priv->rxqs)[idx]) { rte_errno = EINVAL; return -rte_errno; } rxq_ctrl = container_of((*priv->rxqs)[idx], struct mlx5_rxq_ctrl, rxq); return (rte_atomic32_read(&rxq_ctrl->refcnt) == 1); } /** * Verify the Rx Queue list is empty * * @param dev * Pointer to Ethernet device. * * @return * The number of object not released. */ int mlx5_rxq_verify(struct rte_eth_dev *dev) { struct priv *priv = dev->data->dev_private; struct mlx5_rxq_ctrl *rxq_ctrl; int ret = 0; LIST_FOREACH(rxq_ctrl, &priv->rxqsctrl, next) { DRV_LOG(DEBUG, "port %u Rx Queue %u still referenced", dev->data->port_id, rxq_ctrl->idx); ++ret; } return ret; } /** * Create an indirection table. * * @param dev * Pointer to Ethernet device. * @param queues * Queues entering in the indirection table. * @param queues_n * Number of queues in the array. * * @return * The Verbs object initialised, NULL otherwise and rte_errno is set. */ struct mlx5_ind_table_ibv * mlx5_ind_table_ibv_new(struct rte_eth_dev *dev, const uint16_t *queues, uint32_t queues_n) { struct priv *priv = dev->data->dev_private; struct mlx5_ind_table_ibv *ind_tbl; const unsigned int wq_n = rte_is_power_of_2(queues_n) ? log2above(queues_n) : log2above(priv->config.ind_table_max_size); struct ibv_wq *wq[1 << wq_n]; unsigned int i; unsigned int j; ind_tbl = rte_calloc(__func__, 1, sizeof(*ind_tbl) + queues_n * sizeof(uint16_t), 0); if (!ind_tbl) { rte_errno = ENOMEM; return NULL; } for (i = 0; i != queues_n; ++i) { struct mlx5_rxq_ctrl *rxq = mlx5_rxq_get(dev, queues[i]); if (!rxq) goto error; wq[i] = rxq->ibv->wq; ind_tbl->queues[i] = queues[i]; } ind_tbl->queues_n = queues_n; /* Finalise indirection table. */ for (j = 0; i != (unsigned int)(1 << wq_n); ++i, ++j) wq[i] = wq[j]; ind_tbl->ind_table = mlx5_glue->create_rwq_ind_table (priv->ctx, &(struct ibv_rwq_ind_table_init_attr){ .log_ind_tbl_size = wq_n, .ind_tbl = wq, .comp_mask = 0, }); if (!ind_tbl->ind_table) { rte_errno = errno; goto error; } rte_atomic32_inc(&ind_tbl->refcnt); LIST_INSERT_HEAD(&priv->ind_tbls, ind_tbl, next); return ind_tbl; error: rte_free(ind_tbl); DEBUG("port %u cannot create indirection table", dev->data->port_id); return NULL; } /** * Get an indirection table. * * @param dev * Pointer to Ethernet device. * @param queues * Queues entering in the indirection table. * @param queues_n * Number of queues in the array. * * @return * An indirection table if found. */ struct mlx5_ind_table_ibv * mlx5_ind_table_ibv_get(struct rte_eth_dev *dev, const uint16_t *queues, uint32_t queues_n) { struct priv *priv = dev->data->dev_private; struct mlx5_ind_table_ibv *ind_tbl; LIST_FOREACH(ind_tbl, &priv->ind_tbls, next) { if ((ind_tbl->queues_n == queues_n) && (memcmp(ind_tbl->queues, queues, ind_tbl->queues_n * sizeof(ind_tbl->queues[0])) == 0)) break; } if (ind_tbl) { unsigned int i; rte_atomic32_inc(&ind_tbl->refcnt); for (i = 0; i != ind_tbl->queues_n; ++i) mlx5_rxq_get(dev, ind_tbl->queues[i]); } return ind_tbl; } /** * Release an indirection table. * * @param dev * Pointer to Ethernet device. * @param ind_table * Indirection table to release. * * @return * 1 while a reference on it exists, 0 when freed. */ int mlx5_ind_table_ibv_release(struct rte_eth_dev *dev, struct mlx5_ind_table_ibv *ind_tbl) { unsigned int i; if (rte_atomic32_dec_and_test(&ind_tbl->refcnt)) claim_zero(mlx5_glue->destroy_rwq_ind_table (ind_tbl->ind_table)); for (i = 0; i != ind_tbl->queues_n; ++i) claim_nonzero(mlx5_rxq_release(dev, ind_tbl->queues[i])); if (!rte_atomic32_read(&ind_tbl->refcnt)) { LIST_REMOVE(ind_tbl, next); rte_free(ind_tbl); return 0; } return 1; } /** * Verify the Rx Queue list is empty * * @param dev * Pointer to Ethernet device. * * @return * The number of object not released. */ int mlx5_ind_table_ibv_verify(struct rte_eth_dev *dev) { struct priv *priv = dev->data->dev_private; struct mlx5_ind_table_ibv *ind_tbl; int ret = 0; LIST_FOREACH(ind_tbl, &priv->ind_tbls, next) { DRV_LOG(DEBUG, "port %u Verbs indirection table %p still referenced", dev->data->port_id, (void *)ind_tbl); ++ret; } return ret; } /** * Create an Rx Hash queue. * * @param dev * Pointer to Ethernet device. * @param rss_key * RSS key for the Rx hash queue. * @param rss_key_len * RSS key length. * @param hash_fields * Verbs protocol hash field to make the RSS on. * @param queues * Queues entering in hash queue. In case of empty hash_fields only the * first queue index will be taken for the indirection table. * @param queues_n * Number of queues. * @param tunnel * Tunnel type. * * @return * The Verbs object initialised, NULL otherwise and rte_errno is set. */ struct mlx5_hrxq * mlx5_hrxq_new(struct rte_eth_dev *dev, const uint8_t *rss_key, uint32_t rss_key_len, uint64_t hash_fields, const uint16_t *queues, uint32_t queues_n, int tunnel __rte_unused) { struct priv *priv = dev->data->dev_private; struct mlx5_hrxq *hrxq; struct mlx5_ind_table_ibv *ind_tbl; struct ibv_qp *qp; #ifdef HAVE_IBV_DEVICE_TUNNEL_SUPPORT struct mlx5dv_qp_init_attr qp_init_attr; #endif int err; queues_n = hash_fields ? queues_n : 1; ind_tbl = mlx5_ind_table_ibv_get(dev, queues, queues_n); if (!ind_tbl) ind_tbl = mlx5_ind_table_ibv_new(dev, queues, queues_n); if (!ind_tbl) { rte_errno = ENOMEM; return NULL; } #ifdef HAVE_IBV_DEVICE_TUNNEL_SUPPORT memset(&qp_init_attr, 0, sizeof(qp_init_attr)); if (tunnel) { qp_init_attr.comp_mask = MLX5DV_QP_INIT_ATTR_MASK_QP_CREATE_FLAGS; qp_init_attr.create_flags = MLX5DV_QP_CREATE_TUNNEL_OFFLOADS; } #ifdef HAVE_IBV_FLOW_DV_SUPPORT if (dev->data->dev_conf.lpbk_mode) { /* Allow packet sent from NIC loop back w/o source MAC check. */ qp_init_attr.comp_mask |= MLX5DV_QP_INIT_ATTR_MASK_QP_CREATE_FLAGS; qp_init_attr.create_flags |= MLX5DV_QP_CREATE_TIR_ALLOW_SELF_LOOPBACK_UC; } #endif qp = mlx5_glue->dv_create_qp (priv->ctx, &(struct ibv_qp_init_attr_ex){ .qp_type = IBV_QPT_RAW_PACKET, .comp_mask = IBV_QP_INIT_ATTR_PD | IBV_QP_INIT_ATTR_IND_TABLE | IBV_QP_INIT_ATTR_RX_HASH, .rx_hash_conf = (struct ibv_rx_hash_conf){ .rx_hash_function = IBV_RX_HASH_FUNC_TOEPLITZ, .rx_hash_key_len = rss_key_len, .rx_hash_key = (void *)(uintptr_t)rss_key, .rx_hash_fields_mask = hash_fields, }, .rwq_ind_tbl = ind_tbl->ind_table, .pd = priv->pd, }, &qp_init_attr); #else qp = mlx5_glue->create_qp_ex (priv->ctx, &(struct ibv_qp_init_attr_ex){ .qp_type = IBV_QPT_RAW_PACKET, .comp_mask = IBV_QP_INIT_ATTR_PD | IBV_QP_INIT_ATTR_IND_TABLE | IBV_QP_INIT_ATTR_RX_HASH, .rx_hash_conf = (struct ibv_rx_hash_conf){ .rx_hash_function = IBV_RX_HASH_FUNC_TOEPLITZ, .rx_hash_key_len = rss_key_len, .rx_hash_key = (void *)(uintptr_t)rss_key, .rx_hash_fields_mask = hash_fields, }, .rwq_ind_tbl = ind_tbl->ind_table, .pd = priv->pd, }); #endif if (!qp) { rte_errno = errno; goto error; } hrxq = rte_calloc(__func__, 1, sizeof(*hrxq) + rss_key_len, 0); if (!hrxq) goto error; hrxq->ind_table = ind_tbl; hrxq->qp = qp; hrxq->rss_key_len = rss_key_len; hrxq->hash_fields = hash_fields; memcpy(hrxq->rss_key, rss_key, rss_key_len); rte_atomic32_inc(&hrxq->refcnt); LIST_INSERT_HEAD(&priv->hrxqs, hrxq, next); return hrxq; error: err = rte_errno; /* Save rte_errno before cleanup. */ mlx5_ind_table_ibv_release(dev, ind_tbl); if (qp) claim_zero(mlx5_glue->destroy_qp(qp)); rte_errno = err; /* Restore rte_errno. */ return NULL; } /** * Get an Rx Hash queue. * * @param dev * Pointer to Ethernet device. * @param rss_conf * RSS configuration for the Rx hash queue. * @param queues * Queues entering in hash queue. In case of empty hash_fields only the * first queue index will be taken for the indirection table. * @param queues_n * Number of queues. * * @return * An hash Rx queue on success. */ struct mlx5_hrxq * mlx5_hrxq_get(struct rte_eth_dev *dev, const uint8_t *rss_key, uint32_t rss_key_len, uint64_t hash_fields, const uint16_t *queues, uint32_t queues_n) { struct priv *priv = dev->data->dev_private; struct mlx5_hrxq *hrxq; queues_n = hash_fields ? queues_n : 1; LIST_FOREACH(hrxq, &priv->hrxqs, next) { struct mlx5_ind_table_ibv *ind_tbl; if (hrxq->rss_key_len != rss_key_len) continue; if (memcmp(hrxq->rss_key, rss_key, rss_key_len)) continue; if (hrxq->hash_fields != hash_fields) continue; ind_tbl = mlx5_ind_table_ibv_get(dev, queues, queues_n); if (!ind_tbl) continue; if (ind_tbl != hrxq->ind_table) { mlx5_ind_table_ibv_release(dev, ind_tbl); continue; } rte_atomic32_inc(&hrxq->refcnt); return hrxq; } return NULL; } /** * Release the hash Rx queue. * * @param dev * Pointer to Ethernet device. * @param hrxq * Pointer to Hash Rx queue to release. * * @return * 1 while a reference on it exists, 0 when freed. */ int mlx5_hrxq_release(struct rte_eth_dev *dev, struct mlx5_hrxq *hrxq) { if (rte_atomic32_dec_and_test(&hrxq->refcnt)) { claim_zero(mlx5_glue->destroy_qp(hrxq->qp)); mlx5_ind_table_ibv_release(dev, hrxq->ind_table); LIST_REMOVE(hrxq, next); rte_free(hrxq); return 0; } claim_nonzero(mlx5_ind_table_ibv_release(dev, hrxq->ind_table)); return 1; } /** * Verify the Rx Queue list is empty * * @param dev * Pointer to Ethernet device. * * @return * The number of object not released. */ int mlx5_hrxq_ibv_verify(struct rte_eth_dev *dev) { struct priv *priv = dev->data->dev_private; struct mlx5_hrxq *hrxq; int ret = 0; LIST_FOREACH(hrxq, &priv->hrxqs, next) { DRV_LOG(DEBUG, "port %u Verbs hash Rx queue %p still referenced", dev->data->port_id, (void *)hrxq); ++ret; } return ret; } /** * Create a drop Rx queue Verbs object. * * @param dev * Pointer to Ethernet device. * * @return * The Verbs object initialised, NULL otherwise and rte_errno is set. */ struct mlx5_rxq_ibv * mlx5_rxq_ibv_drop_new(struct rte_eth_dev *dev) { struct priv *priv = dev->data->dev_private; struct ibv_cq *cq; struct ibv_wq *wq = NULL; struct mlx5_rxq_ibv *rxq; if (priv->drop_queue.rxq) return priv->drop_queue.rxq; cq = mlx5_glue->create_cq(priv->ctx, 1, NULL, NULL, 0); if (!cq) { DEBUG("port %u cannot allocate CQ for drop queue", dev->data->port_id); rte_errno = errno; goto error; } wq = mlx5_glue->create_wq(priv->ctx, &(struct ibv_wq_init_attr){ .wq_type = IBV_WQT_RQ, .max_wr = 1, .max_sge = 1, .pd = priv->pd, .cq = cq, }); if (!wq) { DEBUG("port %u cannot allocate WQ for drop queue", dev->data->port_id); rte_errno = errno; goto error; } rxq = rte_calloc(__func__, 1, sizeof(*rxq), 0); if (!rxq) { DEBUG("port %u cannot allocate drop Rx queue memory", dev->data->port_id); rte_errno = ENOMEM; goto error; } rxq->cq = cq; rxq->wq = wq; priv->drop_queue.rxq = rxq; return rxq; error: if (wq) claim_zero(mlx5_glue->destroy_wq(wq)); if (cq) claim_zero(mlx5_glue->destroy_cq(cq)); return NULL; } /** * Release a drop Rx queue Verbs object. * * @param dev * Pointer to Ethernet device. * * @return * The Verbs object initialised, NULL otherwise and rte_errno is set. */ void mlx5_rxq_ibv_drop_release(struct rte_eth_dev *dev) { struct priv *priv = dev->data->dev_private; struct mlx5_rxq_ibv *rxq = priv->drop_queue.rxq; if (rxq->wq) claim_zero(mlx5_glue->destroy_wq(rxq->wq)); if (rxq->cq) claim_zero(mlx5_glue->destroy_cq(rxq->cq)); rte_free(rxq); priv->drop_queue.rxq = NULL; } /** * Create a drop indirection table. * * @param dev * Pointer to Ethernet device. * * @return * The Verbs object initialised, NULL otherwise and rte_errno is set. */ struct mlx5_ind_table_ibv * mlx5_ind_table_ibv_drop_new(struct rte_eth_dev *dev) { struct priv *priv = dev->data->dev_private; struct mlx5_ind_table_ibv *ind_tbl; struct mlx5_rxq_ibv *rxq; struct mlx5_ind_table_ibv tmpl; rxq = mlx5_rxq_ibv_drop_new(dev); if (!rxq) return NULL; tmpl.ind_table = mlx5_glue->create_rwq_ind_table (priv->ctx, &(struct ibv_rwq_ind_table_init_attr){ .log_ind_tbl_size = 0, .ind_tbl = &rxq->wq, .comp_mask = 0, }); if (!tmpl.ind_table) { DEBUG("port %u cannot allocate indirection table for drop" " queue", dev->data->port_id); rte_errno = errno; goto error; } ind_tbl = rte_calloc(__func__, 1, sizeof(*ind_tbl), 0); if (!ind_tbl) { rte_errno = ENOMEM; goto error; } ind_tbl->ind_table = tmpl.ind_table; return ind_tbl; error: mlx5_rxq_ibv_drop_release(dev); return NULL; } /** * Release a drop indirection table. * * @param dev * Pointer to Ethernet device. */ void mlx5_ind_table_ibv_drop_release(struct rte_eth_dev *dev) { struct priv *priv = dev->data->dev_private; struct mlx5_ind_table_ibv *ind_tbl = priv->drop_queue.hrxq->ind_table; claim_zero(mlx5_glue->destroy_rwq_ind_table(ind_tbl->ind_table)); mlx5_rxq_ibv_drop_release(dev); rte_free(ind_tbl); priv->drop_queue.hrxq->ind_table = NULL; } /** * Create a drop Rx Hash queue. * * @param dev * Pointer to Ethernet device. * * @return * The Verbs object initialised, NULL otherwise and rte_errno is set. */ struct mlx5_hrxq * mlx5_hrxq_drop_new(struct rte_eth_dev *dev) { struct priv *priv = dev->data->dev_private; struct mlx5_ind_table_ibv *ind_tbl; struct ibv_qp *qp; struct mlx5_hrxq *hrxq; if (priv->drop_queue.hrxq) { rte_atomic32_inc(&priv->drop_queue.hrxq->refcnt); return priv->drop_queue.hrxq; } ind_tbl = mlx5_ind_table_ibv_drop_new(dev); if (!ind_tbl) return NULL; qp = mlx5_glue->create_qp_ex(priv->ctx, &(struct ibv_qp_init_attr_ex){ .qp_type = IBV_QPT_RAW_PACKET, .comp_mask = IBV_QP_INIT_ATTR_PD | IBV_QP_INIT_ATTR_IND_TABLE | IBV_QP_INIT_ATTR_RX_HASH, .rx_hash_conf = (struct ibv_rx_hash_conf){ .rx_hash_function = IBV_RX_HASH_FUNC_TOEPLITZ, .rx_hash_key_len = MLX5_RSS_HASH_KEY_LEN, .rx_hash_key = rss_hash_default_key, .rx_hash_fields_mask = 0, }, .rwq_ind_tbl = ind_tbl->ind_table, .pd = priv->pd }); if (!qp) { DEBUG("port %u cannot allocate QP for drop queue", dev->data->port_id); rte_errno = errno; goto error; } hrxq = rte_calloc(__func__, 1, sizeof(*hrxq), 0); if (!hrxq) { DRV_LOG(WARNING, "port %u cannot allocate memory for drop queue", dev->data->port_id); rte_errno = ENOMEM; goto error; } hrxq->ind_table = ind_tbl; hrxq->qp = qp; priv->drop_queue.hrxq = hrxq; rte_atomic32_set(&hrxq->refcnt, 1); return hrxq; error: if (ind_tbl) mlx5_ind_table_ibv_drop_release(dev); return NULL; } /** * Release a drop hash Rx queue. * * @param dev * Pointer to Ethernet device. */ void mlx5_hrxq_drop_release(struct rte_eth_dev *dev) { struct priv *priv = dev->data->dev_private; struct mlx5_hrxq *hrxq = priv->drop_queue.hrxq; if (rte_atomic32_dec_and_test(&hrxq->refcnt)) { claim_zero(mlx5_glue->destroy_qp(hrxq->qp)); mlx5_ind_table_ibv_drop_release(dev); rte_free(hrxq); priv->drop_queue.hrxq = NULL; } }