323e7b667f
Removed DEV_RX_OFFLOAD_CRC_STRIP offload flag. Without any specific Rx offload flag, default behavior by PMDs is to strip CRC. PMDs that support keeping CRC should advertise DEV_RX_OFFLOAD_KEEP_CRC Rx offload capability. Applications that require keeping CRC should check PMD capability first and if it is supported can enable this feature by setting DEV_RX_OFFLOAD_KEEP_CRC in Rx offload flag in rte_eth_dev_configure() Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com> Acked-by: Tomasz Duszynski <tdu@semihalf.com> Acked-by: Shahaf Shuler <shahafs@mellanox.com> Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com> Acked-by: Jan Remes <remes@netcope.com> Acked-by: Jerin Jacob <jerin.jacob@caviumnetworks.com> Acked-by: Hyong Youb Kim <hyonkim@cisco.com>
936 lines
23 KiB
C
936 lines
23 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright 2017 6WIND S.A.
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* Copyright 2017 Mellanox Technologies, Ltd
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*/
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/**
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* @file
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* Rx queues configuration for mlx4 driver.
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*/
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#include <assert.h>
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#include <errno.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <string.h>
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/* Verbs headers do not support -pedantic. */
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#ifdef PEDANTIC
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#pragma GCC diagnostic ignored "-Wpedantic"
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#endif
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#include <infiniband/mlx4dv.h>
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#include <infiniband/verbs.h>
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#ifdef PEDANTIC
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#pragma GCC diagnostic error "-Wpedantic"
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#endif
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#include <rte_byteorder.h>
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#include <rte_common.h>
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#include <rte_errno.h>
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#include <rte_ethdev_driver.h>
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#include <rte_flow.h>
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#include <rte_malloc.h>
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#include <rte_mbuf.h>
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#include <rte_mempool.h>
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#include "mlx4.h"
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#include "mlx4_glue.h"
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#include "mlx4_flow.h"
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#include "mlx4_rxtx.h"
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#include "mlx4_utils.h"
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/**
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* Historical RSS hash key.
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*
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* This used to be the default for mlx4 in Linux before v3.19 switched to
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* generating random hash keys through netdev_rss_key_fill().
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*
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* It is used in this PMD for consistency with past DPDK releases but can
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* now be overridden through user configuration.
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*
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* Note: this is not const to work around API quirks.
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*/
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uint8_t
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mlx4_rss_hash_key_default[MLX4_RSS_HASH_KEY_SIZE] = {
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0x2c, 0xc6, 0x81, 0xd1,
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0x5b, 0xdb, 0xf4, 0xf7,
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0xfc, 0xa2, 0x83, 0x19,
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0xdb, 0x1a, 0x3e, 0x94,
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0x6b, 0x9e, 0x38, 0xd9,
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0x2c, 0x9c, 0x03, 0xd1,
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0xad, 0x99, 0x44, 0xa7,
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0xd9, 0x56, 0x3d, 0x59,
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0x06, 0x3c, 0x25, 0xf3,
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0xfc, 0x1f, 0xdc, 0x2a,
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};
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/**
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* Obtain a RSS context with specified properties.
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*
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* Used when creating a flow rule targeting one or several Rx queues.
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*
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* If a matching RSS context already exists, it is returned with its
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* reference count incremented.
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*
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* @param priv
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* Pointer to private structure.
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* @param fields
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* Fields for RSS processing (Verbs format).
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* @param[in] key
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* Hash key to use (whose size is exactly MLX4_RSS_HASH_KEY_SIZE).
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* @param queues
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* Number of target queues.
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* @param[in] queue_id
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* Target queues.
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*
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* @return
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* Pointer to RSS context on success, NULL otherwise and rte_errno is set.
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*/
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struct mlx4_rss *
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mlx4_rss_get(struct priv *priv, uint64_t fields,
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const uint8_t key[MLX4_RSS_HASH_KEY_SIZE],
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uint16_t queues, const uint16_t queue_id[])
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{
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struct mlx4_rss *rss;
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size_t queue_id_size = sizeof(queue_id[0]) * queues;
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LIST_FOREACH(rss, &priv->rss, next)
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if (fields == rss->fields &&
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queues == rss->queues &&
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!memcmp(key, rss->key, MLX4_RSS_HASH_KEY_SIZE) &&
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!memcmp(queue_id, rss->queue_id, queue_id_size)) {
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++rss->refcnt;
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return rss;
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}
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rss = rte_malloc(__func__, offsetof(struct mlx4_rss, queue_id) +
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queue_id_size, 0);
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if (!rss)
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goto error;
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*rss = (struct mlx4_rss){
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.priv = priv,
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.refcnt = 1,
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.usecnt = 0,
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.qp = NULL,
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.ind = NULL,
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.fields = fields,
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.queues = queues,
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};
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memcpy(rss->key, key, MLX4_RSS_HASH_KEY_SIZE);
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memcpy(rss->queue_id, queue_id, queue_id_size);
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LIST_INSERT_HEAD(&priv->rss, rss, next);
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return rss;
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error:
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rte_errno = ENOMEM;
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return NULL;
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}
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/**
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* Release a RSS context instance.
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*
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* Used when destroying a flow rule targeting one or several Rx queues.
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*
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* This function decrements the reference count of the context and destroys
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* it after reaching 0. The context must have no users at this point; all
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* prior calls to mlx4_rss_attach() must have been followed by matching
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* calls to mlx4_rss_detach().
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*
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* @param rss
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* RSS context to release.
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*/
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void
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mlx4_rss_put(struct mlx4_rss *rss)
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{
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assert(rss->refcnt);
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if (--rss->refcnt)
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return;
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assert(!rss->usecnt);
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assert(!rss->qp);
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assert(!rss->ind);
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LIST_REMOVE(rss, next);
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rte_free(rss);
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}
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/**
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* Attach a user to a RSS context instance.
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*
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* Used when the RSS QP and indirection table objects must be instantiated,
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* that is, when a flow rule must be enabled.
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*
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* This function increments the usage count of the context.
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*
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* @param rss
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* RSS context to attach to.
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*
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* @return
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* 0 on success, a negative errno value otherwise and rte_errno is set.
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*/
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int
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mlx4_rss_attach(struct mlx4_rss *rss)
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{
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assert(rss->refcnt);
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if (rss->usecnt++) {
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assert(rss->qp);
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assert(rss->ind);
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return 0;
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}
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struct ibv_wq *ind_tbl[rss->queues];
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struct priv *priv = rss->priv;
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const char *msg;
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unsigned int i = 0;
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int ret;
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if (!rte_is_power_of_2(RTE_DIM(ind_tbl))) {
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ret = EINVAL;
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msg = "number of RSS queues must be a power of two";
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goto error;
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}
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for (i = 0; i != RTE_DIM(ind_tbl); ++i) {
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uint16_t id = rss->queue_id[i];
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struct rxq *rxq = NULL;
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if (id < priv->dev->data->nb_rx_queues)
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rxq = priv->dev->data->rx_queues[id];
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if (!rxq) {
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ret = EINVAL;
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msg = "RSS target queue is not configured";
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goto error;
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}
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ret = mlx4_rxq_attach(rxq);
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if (ret) {
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ret = -ret;
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msg = "unable to attach RSS target queue";
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goto error;
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}
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ind_tbl[i] = rxq->wq;
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}
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rss->ind = mlx4_glue->create_rwq_ind_table
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(priv->ctx,
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&(struct ibv_rwq_ind_table_init_attr){
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.log_ind_tbl_size = rte_log2_u32(RTE_DIM(ind_tbl)),
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.ind_tbl = ind_tbl,
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.comp_mask = 0,
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});
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if (!rss->ind) {
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ret = errno ? errno : EINVAL;
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msg = "RSS indirection table creation failure";
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goto error;
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}
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rss->qp = mlx4_glue->create_qp_ex
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(priv->ctx,
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&(struct ibv_qp_init_attr_ex){
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.comp_mask = (IBV_QP_INIT_ATTR_PD |
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IBV_QP_INIT_ATTR_RX_HASH |
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IBV_QP_INIT_ATTR_IND_TABLE),
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.qp_type = IBV_QPT_RAW_PACKET,
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.pd = priv->pd,
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.rwq_ind_tbl = rss->ind,
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.rx_hash_conf = {
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.rx_hash_function = IBV_RX_HASH_FUNC_TOEPLITZ,
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.rx_hash_key_len = MLX4_RSS_HASH_KEY_SIZE,
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.rx_hash_key = rss->key,
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.rx_hash_fields_mask = rss->fields,
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},
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});
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if (!rss->qp) {
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ret = errno ? errno : EINVAL;
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msg = "RSS hash QP creation failure";
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goto error;
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}
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ret = mlx4_glue->modify_qp
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(rss->qp,
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&(struct ibv_qp_attr){
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.qp_state = IBV_QPS_INIT,
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.port_num = priv->port,
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},
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IBV_QP_STATE | IBV_QP_PORT);
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if (ret) {
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msg = "failed to switch RSS hash QP to INIT state";
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goto error;
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}
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ret = mlx4_glue->modify_qp
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(rss->qp,
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&(struct ibv_qp_attr){
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.qp_state = IBV_QPS_RTR,
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},
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IBV_QP_STATE);
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if (ret) {
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msg = "failed to switch RSS hash QP to RTR state";
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goto error;
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}
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return 0;
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error:
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if (rss->qp) {
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claim_zero(mlx4_glue->destroy_qp(rss->qp));
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rss->qp = NULL;
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}
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if (rss->ind) {
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claim_zero(mlx4_glue->destroy_rwq_ind_table(rss->ind));
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rss->ind = NULL;
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}
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while (i--)
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mlx4_rxq_detach(priv->dev->data->rx_queues[rss->queue_id[i]]);
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ERROR("mlx4: %s", msg);
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--rss->usecnt;
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rte_errno = ret;
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return -ret;
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}
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/**
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* Detach a user from a RSS context instance.
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*
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* Used when disabling (not destroying) a flow rule.
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*
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* This function decrements the usage count of the context and destroys
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* usage resources after reaching 0.
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*
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* @param rss
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* RSS context to detach from.
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*/
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void
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mlx4_rss_detach(struct mlx4_rss *rss)
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{
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struct priv *priv = rss->priv;
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unsigned int i;
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assert(rss->refcnt);
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assert(rss->qp);
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assert(rss->ind);
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if (--rss->usecnt)
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return;
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claim_zero(mlx4_glue->destroy_qp(rss->qp));
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rss->qp = NULL;
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claim_zero(mlx4_glue->destroy_rwq_ind_table(rss->ind));
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rss->ind = NULL;
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for (i = 0; i != rss->queues; ++i)
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mlx4_rxq_detach(priv->dev->data->rx_queues[rss->queue_id[i]]);
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}
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/**
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* Initialize common RSS context resources.
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*
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* Because ConnectX-3 hardware limitations require a fixed order in the
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* indirection table, WQs must be allocated sequentially to be part of a
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* common RSS context.
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*
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* Since a newly created WQ cannot be moved to a different context, this
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* function allocates them all at once, one for each configured Rx queue,
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* as well as all related resources (CQs and mbufs).
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*
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* This must therefore be done before creating any Rx flow rules relying on
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* indirection tables.
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*
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* @param priv
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* Pointer to private structure.
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*
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* @return
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* 0 on success, a negative errno value otherwise and rte_errno is set.
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*/
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int
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mlx4_rss_init(struct priv *priv)
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{
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struct rte_eth_dev *dev = priv->dev;
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uint8_t log2_range = rte_log2_u32(dev->data->nb_rx_queues);
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uint32_t wq_num_prev = 0;
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const char *msg;
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unsigned int i;
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int ret;
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if (priv->rss_init)
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return 0;
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if (priv->dev->data->nb_rx_queues > priv->hw_rss_max_qps) {
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ERROR("RSS does not support more than %d queues",
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priv->hw_rss_max_qps);
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rte_errno = EINVAL;
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return -rte_errno;
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}
|
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/* Prepare range for RSS contexts before creating the first WQ. */
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ret = mlx4_glue->dv_set_context_attr
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(priv->ctx,
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MLX4DV_SET_CTX_ATTR_LOG_WQS_RANGE_SZ,
|
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&log2_range);
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if (ret) {
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ERROR("cannot set up range size for RSS context to %u"
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" (for %u Rx queues), error: %s",
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1 << log2_range, dev->data->nb_rx_queues, strerror(ret));
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rte_errno = ret;
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return -ret;
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}
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for (i = 0; i != priv->dev->data->nb_rx_queues; ++i) {
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struct rxq *rxq = priv->dev->data->rx_queues[i];
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struct ibv_cq *cq;
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struct ibv_wq *wq;
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uint32_t wq_num;
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/* Attach the configured Rx queues. */
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if (rxq) {
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assert(!rxq->usecnt);
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ret = mlx4_rxq_attach(rxq);
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if (!ret) {
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wq_num = rxq->wq->wq_num;
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goto wq_num_check;
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}
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ret = -ret;
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msg = "unable to create Rx queue resources";
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goto error;
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}
|
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/*
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* WQs are temporarily allocated for unconfigured Rx queues
|
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* to maintain proper index alignment in indirection table
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* by skipping unused WQ numbers.
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*
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* The reason this works at all even though these WQs are
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* immediately destroyed is that WQNs are allocated
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* sequentially and are guaranteed to never be reused in the
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* same context by the underlying implementation.
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*/
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cq = mlx4_glue->create_cq(priv->ctx, 1, NULL, NULL, 0);
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if (!cq) {
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ret = ENOMEM;
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msg = "placeholder CQ creation failure";
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goto error;
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}
|
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wq = mlx4_glue->create_wq
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(priv->ctx,
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&(struct ibv_wq_init_attr){
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.wq_type = IBV_WQT_RQ,
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.max_wr = 1,
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.max_sge = 1,
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.pd = priv->pd,
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.cq = cq,
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});
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if (wq) {
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wq_num = wq->wq_num;
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claim_zero(mlx4_glue->destroy_wq(wq));
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} else {
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wq_num = 0; /* Shut up GCC 4.8 warnings. */
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}
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claim_zero(mlx4_glue->destroy_cq(cq));
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if (!wq) {
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ret = ENOMEM;
|
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msg = "placeholder WQ creation failure";
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goto error;
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}
|
|
wq_num_check:
|
|
/*
|
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* While guaranteed by the implementation, make sure WQ
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* numbers are really sequential (as the saying goes,
|
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* trust, but verify).
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*/
|
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if (i && wq_num - wq_num_prev != 1) {
|
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if (rxq)
|
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mlx4_rxq_detach(rxq);
|
|
ret = ERANGE;
|
|
msg = "WQ numbers are not sequential";
|
|
goto error;
|
|
}
|
|
wq_num_prev = wq_num;
|
|
}
|
|
priv->rss_init = 1;
|
|
return 0;
|
|
error:
|
|
ERROR("cannot initialize common RSS resources (queue %u): %s: %s",
|
|
i, msg, strerror(ret));
|
|
while (i--) {
|
|
struct rxq *rxq = priv->dev->data->rx_queues[i];
|
|
|
|
if (rxq)
|
|
mlx4_rxq_detach(rxq);
|
|
}
|
|
rte_errno = ret;
|
|
return -ret;
|
|
}
|
|
|
|
/**
|
|
* Release common RSS context resources.
|
|
*
|
|
* As the reverse of mlx4_rss_init(), this must be done after removing all
|
|
* flow rules relying on indirection tables.
|
|
*
|
|
* @param priv
|
|
* Pointer to private structure.
|
|
*/
|
|
void
|
|
mlx4_rss_deinit(struct priv *priv)
|
|
{
|
|
unsigned int i;
|
|
|
|
if (!priv->rss_init)
|
|
return;
|
|
for (i = 0; i != priv->dev->data->nb_rx_queues; ++i) {
|
|
struct rxq *rxq = priv->dev->data->rx_queues[i];
|
|
|
|
if (rxq) {
|
|
assert(rxq->usecnt == 1);
|
|
mlx4_rxq_detach(rxq);
|
|
}
|
|
}
|
|
priv->rss_init = 0;
|
|
}
|
|
|
|
/**
|
|
* Attach a user to a Rx queue.
|
|
*
|
|
* Used when the resources of an Rx queue must be instantiated for it to
|
|
* become in a usable state.
|
|
*
|
|
* This function increments the usage count of the Rx queue.
|
|
*
|
|
* @param rxq
|
|
* Pointer to Rx queue structure.
|
|
*
|
|
* @return
|
|
* 0 on success, negative errno value otherwise and rte_errno is set.
|
|
*/
|
|
int
|
|
mlx4_rxq_attach(struct rxq *rxq)
|
|
{
|
|
if (rxq->usecnt++) {
|
|
assert(rxq->cq);
|
|
assert(rxq->wq);
|
|
assert(rxq->wqes);
|
|
assert(rxq->rq_db);
|
|
return 0;
|
|
}
|
|
|
|
struct priv *priv = rxq->priv;
|
|
struct rte_eth_dev *dev = priv->dev;
|
|
const uint32_t elts_n = 1 << rxq->elts_n;
|
|
const uint32_t sges_n = 1 << rxq->sges_n;
|
|
struct rte_mbuf *(*elts)[elts_n] = rxq->elts;
|
|
struct mlx4dv_obj mlxdv;
|
|
struct mlx4dv_rwq dv_rwq;
|
|
struct mlx4dv_cq dv_cq = { .comp_mask = MLX4DV_CQ_MASK_UAR, };
|
|
const char *msg;
|
|
struct ibv_cq *cq = NULL;
|
|
struct ibv_wq *wq = NULL;
|
|
uint32_t create_flags = 0;
|
|
uint32_t comp_mask = 0;
|
|
volatile struct mlx4_wqe_data_seg (*wqes)[];
|
|
unsigned int i;
|
|
int ret;
|
|
|
|
assert(rte_is_power_of_2(elts_n));
|
|
cq = mlx4_glue->create_cq(priv->ctx, elts_n / sges_n, NULL,
|
|
rxq->channel, 0);
|
|
if (!cq) {
|
|
ret = ENOMEM;
|
|
msg = "CQ creation failure";
|
|
goto error;
|
|
}
|
|
/* By default, FCS (CRC) is stripped by hardware. */
|
|
if (rxq->crc_present) {
|
|
create_flags |= IBV_WQ_FLAGS_SCATTER_FCS;
|
|
comp_mask |= IBV_WQ_INIT_ATTR_FLAGS;
|
|
}
|
|
wq = mlx4_glue->create_wq
|
|
(priv->ctx,
|
|
&(struct ibv_wq_init_attr){
|
|
.wq_type = IBV_WQT_RQ,
|
|
.max_wr = elts_n / sges_n,
|
|
.max_sge = sges_n,
|
|
.pd = priv->pd,
|
|
.cq = cq,
|
|
.comp_mask = comp_mask,
|
|
.create_flags = create_flags,
|
|
});
|
|
if (!wq) {
|
|
ret = errno ? errno : EINVAL;
|
|
msg = "WQ creation failure";
|
|
goto error;
|
|
}
|
|
ret = mlx4_glue->modify_wq
|
|
(wq,
|
|
&(struct ibv_wq_attr){
|
|
.attr_mask = IBV_WQ_ATTR_STATE,
|
|
.wq_state = IBV_WQS_RDY,
|
|
});
|
|
if (ret) {
|
|
msg = "WQ state change to IBV_WQS_RDY failed";
|
|
goto error;
|
|
}
|
|
/* Retrieve device queue information. */
|
|
mlxdv.cq.in = cq;
|
|
mlxdv.cq.out = &dv_cq;
|
|
mlxdv.rwq.in = wq;
|
|
mlxdv.rwq.out = &dv_rwq;
|
|
ret = mlx4_glue->dv_init_obj(&mlxdv, MLX4DV_OBJ_RWQ | MLX4DV_OBJ_CQ);
|
|
if (ret) {
|
|
msg = "failed to obtain device information from WQ/CQ objects";
|
|
goto error;
|
|
}
|
|
/* Pre-register Rx mempool. */
|
|
DEBUG("port %u Rx queue %u registering mp %s having %u chunks",
|
|
priv->dev->data->port_id, rxq->stats.idx,
|
|
rxq->mp->name, rxq->mp->nb_mem_chunks);
|
|
mlx4_mr_update_mp(dev, &rxq->mr_ctrl, rxq->mp);
|
|
wqes = (volatile struct mlx4_wqe_data_seg (*)[])
|
|
((uintptr_t)dv_rwq.buf.buf + dv_rwq.rq.offset);
|
|
for (i = 0; i != RTE_DIM(*elts); ++i) {
|
|
volatile struct mlx4_wqe_data_seg *scat = &(*wqes)[i];
|
|
struct rte_mbuf *buf = rte_pktmbuf_alloc(rxq->mp);
|
|
|
|
if (buf == NULL) {
|
|
while (i--) {
|
|
rte_pktmbuf_free_seg((*elts)[i]);
|
|
(*elts)[i] = NULL;
|
|
}
|
|
ret = ENOMEM;
|
|
msg = "cannot allocate mbuf";
|
|
goto error;
|
|
}
|
|
/* Headroom is reserved by rte_pktmbuf_alloc(). */
|
|
assert(buf->data_off == RTE_PKTMBUF_HEADROOM);
|
|
/* Buffer is supposed to be empty. */
|
|
assert(rte_pktmbuf_data_len(buf) == 0);
|
|
assert(rte_pktmbuf_pkt_len(buf) == 0);
|
|
/* Only the first segment keeps headroom. */
|
|
if (i % sges_n)
|
|
buf->data_off = 0;
|
|
buf->port = rxq->port_id;
|
|
buf->data_len = rte_pktmbuf_tailroom(buf);
|
|
buf->pkt_len = rte_pktmbuf_tailroom(buf);
|
|
buf->nb_segs = 1;
|
|
*scat = (struct mlx4_wqe_data_seg){
|
|
.addr = rte_cpu_to_be_64(rte_pktmbuf_mtod(buf,
|
|
uintptr_t)),
|
|
.byte_count = rte_cpu_to_be_32(buf->data_len),
|
|
.lkey = mlx4_rx_mb2mr(rxq, buf),
|
|
};
|
|
(*elts)[i] = buf;
|
|
}
|
|
DEBUG("%p: allocated and configured %u segments (max %u packets)",
|
|
(void *)rxq, elts_n, elts_n / sges_n);
|
|
rxq->cq = cq;
|
|
rxq->wq = wq;
|
|
rxq->wqes = wqes;
|
|
rxq->rq_db = dv_rwq.rdb;
|
|
rxq->mcq.buf = dv_cq.buf.buf;
|
|
rxq->mcq.cqe_cnt = dv_cq.cqe_cnt;
|
|
rxq->mcq.set_ci_db = dv_cq.set_ci_db;
|
|
rxq->mcq.cqe_64 = (dv_cq.cqe_size & 64) ? 1 : 0;
|
|
rxq->mcq.arm_db = dv_cq.arm_db;
|
|
rxq->mcq.arm_sn = dv_cq.arm_sn;
|
|
rxq->mcq.cqn = dv_cq.cqn;
|
|
rxq->mcq.cq_uar = dv_cq.cq_uar;
|
|
rxq->mcq.cq_db_reg = (uint8_t *)dv_cq.cq_uar + MLX4_CQ_DOORBELL;
|
|
/* Update doorbell counter. */
|
|
rxq->rq_ci = elts_n / sges_n;
|
|
rte_wmb();
|
|
*rxq->rq_db = rte_cpu_to_be_32(rxq->rq_ci);
|
|
return 0;
|
|
error:
|
|
if (wq)
|
|
claim_zero(mlx4_glue->destroy_wq(wq));
|
|
if (cq)
|
|
claim_zero(mlx4_glue->destroy_cq(cq));
|
|
--rxq->usecnt;
|
|
rte_errno = ret;
|
|
ERROR("error while attaching Rx queue %p: %s: %s",
|
|
(void *)rxq, msg, strerror(ret));
|
|
return -ret;
|
|
}
|
|
|
|
/**
|
|
* Detach a user from a Rx queue.
|
|
*
|
|
* This function decrements the usage count of the Rx queue and destroys
|
|
* usage resources after reaching 0.
|
|
*
|
|
* @param rxq
|
|
* Pointer to Rx queue structure.
|
|
*/
|
|
void
|
|
mlx4_rxq_detach(struct rxq *rxq)
|
|
{
|
|
unsigned int i;
|
|
struct rte_mbuf *(*elts)[1 << rxq->elts_n] = rxq->elts;
|
|
|
|
if (--rxq->usecnt)
|
|
return;
|
|
rxq->rq_ci = 0;
|
|
memset(&rxq->mcq, 0, sizeof(rxq->mcq));
|
|
rxq->rq_db = NULL;
|
|
rxq->wqes = NULL;
|
|
claim_zero(mlx4_glue->destroy_wq(rxq->wq));
|
|
rxq->wq = NULL;
|
|
claim_zero(mlx4_glue->destroy_cq(rxq->cq));
|
|
rxq->cq = NULL;
|
|
DEBUG("%p: freeing Rx queue elements", (void *)rxq);
|
|
for (i = 0; (i != RTE_DIM(*elts)); ++i) {
|
|
if (!(*elts)[i])
|
|
continue;
|
|
rte_pktmbuf_free_seg((*elts)[i]);
|
|
(*elts)[i] = NULL;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the per-queue supported offloads.
|
|
*
|
|
* @param priv
|
|
* Pointer to private structure.
|
|
*
|
|
* @return
|
|
* Supported Tx offloads.
|
|
*/
|
|
uint64_t
|
|
mlx4_get_rx_queue_offloads(struct priv *priv)
|
|
{
|
|
uint64_t offloads = DEV_RX_OFFLOAD_SCATTER |
|
|
DEV_RX_OFFLOAD_KEEP_CRC |
|
|
DEV_RX_OFFLOAD_JUMBO_FRAME;
|
|
|
|
if (priv->hw_csum)
|
|
offloads |= DEV_RX_OFFLOAD_CHECKSUM;
|
|
return offloads;
|
|
}
|
|
|
|
/**
|
|
* Returns the per-port supported offloads.
|
|
*
|
|
* @param priv
|
|
* Pointer to private structure.
|
|
*
|
|
* @return
|
|
* Supported Rx offloads.
|
|
*/
|
|
uint64_t
|
|
mlx4_get_rx_port_offloads(struct priv *priv)
|
|
{
|
|
uint64_t offloads = DEV_RX_OFFLOAD_VLAN_FILTER;
|
|
|
|
(void)priv;
|
|
return offloads;
|
|
}
|
|
|
|
/**
|
|
* DPDK callback to configure a Rx queue.
|
|
*
|
|
* @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, negative errno value otherwise and rte_errno is set.
|
|
*/
|
|
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)
|
|
{
|
|
struct priv *priv = dev->data->dev_private;
|
|
uint32_t mb_len = rte_pktmbuf_data_room_size(mp);
|
|
struct rte_mbuf *(*elts)[rte_align32pow2(desc)];
|
|
struct rxq *rxq;
|
|
struct mlx4_malloc_vec vec[] = {
|
|
{
|
|
.align = RTE_CACHE_LINE_SIZE,
|
|
.size = sizeof(*rxq),
|
|
.addr = (void **)&rxq,
|
|
},
|
|
{
|
|
.align = RTE_CACHE_LINE_SIZE,
|
|
.size = sizeof(*elts),
|
|
.addr = (void **)&elts,
|
|
},
|
|
};
|
|
int ret;
|
|
uint32_t crc_present;
|
|
uint64_t offloads;
|
|
|
|
offloads = conf->offloads | dev->data->dev_conf.rxmode.offloads;
|
|
|
|
DEBUG("%p: configuring queue %u for %u descriptors",
|
|
(void *)dev, idx, desc);
|
|
|
|
if (idx >= dev->data->nb_rx_queues) {
|
|
rte_errno = EOVERFLOW;
|
|
ERROR("%p: queue index out of range (%u >= %u)",
|
|
(void *)dev, idx, dev->data->nb_rx_queues);
|
|
return -rte_errno;
|
|
}
|
|
rxq = dev->data->rx_queues[idx];
|
|
if (rxq) {
|
|
rte_errno = EEXIST;
|
|
ERROR("%p: Rx queue %u already configured, release it first",
|
|
(void *)dev, idx);
|
|
return -rte_errno;
|
|
}
|
|
if (!desc) {
|
|
rte_errno = EINVAL;
|
|
ERROR("%p: invalid number of Rx descriptors", (void *)dev);
|
|
return -rte_errno;
|
|
}
|
|
if (desc != RTE_DIM(*elts)) {
|
|
desc = RTE_DIM(*elts);
|
|
WARN("%p: increased number of descriptors in Rx queue %u"
|
|
" to the next power of two (%u)",
|
|
(void *)dev, idx, desc);
|
|
}
|
|
/* By default, FCS (CRC) is stripped by hardware. */
|
|
crc_present = 0;
|
|
if (offloads & DEV_RX_OFFLOAD_KEEP_CRC) {
|
|
if (priv->hw_fcs_strip) {
|
|
crc_present = 1;
|
|
} else {
|
|
WARN("%p: CRC stripping has been disabled but will still"
|
|
" be performed by hardware, make sure MLNX_OFED and"
|
|
" firmware are up to date",
|
|
(void *)dev);
|
|
}
|
|
}
|
|
DEBUG("%p: CRC stripping is %s, %u bytes will be subtracted from"
|
|
" incoming frames to hide it",
|
|
(void *)dev,
|
|
crc_present ? "disabled" : "enabled",
|
|
crc_present << 2);
|
|
/* Allocate and initialize Rx queue. */
|
|
mlx4_zmallocv_socket("RXQ", vec, RTE_DIM(vec), socket);
|
|
if (!rxq) {
|
|
ERROR("%p: unable to allocate queue index %u",
|
|
(void *)dev, idx);
|
|
return -rte_errno;
|
|
}
|
|
*rxq = (struct rxq){
|
|
.priv = priv,
|
|
.mp = mp,
|
|
.port_id = dev->data->port_id,
|
|
.sges_n = 0,
|
|
.elts_n = rte_log2_u32(desc),
|
|
.elts = elts,
|
|
/* Toggle Rx checksum offload if hardware supports it. */
|
|
.csum = priv->hw_csum &&
|
|
(offloads & DEV_RX_OFFLOAD_CHECKSUM),
|
|
.csum_l2tun = priv->hw_csum_l2tun &&
|
|
(offloads & DEV_RX_OFFLOAD_CHECKSUM),
|
|
.crc_present = crc_present,
|
|
.l2tun_offload = priv->hw_csum_l2tun,
|
|
.stats = {
|
|
.idx = idx,
|
|
},
|
|
.socket = socket,
|
|
};
|
|
/* Enable scattered packets support for this queue if necessary. */
|
|
assert(mb_len >= RTE_PKTMBUF_HEADROOM);
|
|
if (dev->data->dev_conf.rxmode.max_rx_pkt_len <=
|
|
(mb_len - RTE_PKTMBUF_HEADROOM)) {
|
|
;
|
|
} else if (offloads & DEV_RX_OFFLOAD_SCATTER) {
|
|
uint32_t size =
|
|
RTE_PKTMBUF_HEADROOM +
|
|
dev->data->dev_conf.rxmode.max_rx_pkt_len;
|
|
uint32_t sges_n;
|
|
|
|
/*
|
|
* Determine the number of SGEs needed for a full packet
|
|
* and round it to the next power of two.
|
|
*/
|
|
sges_n = rte_log2_u32((size / mb_len) + !!(size % mb_len));
|
|
rxq->sges_n = sges_n;
|
|
/* Make sure sges_n did not overflow. */
|
|
size = mb_len * (1 << rxq->sges_n);
|
|
size -= RTE_PKTMBUF_HEADROOM;
|
|
if (size < dev->data->dev_conf.rxmode.max_rx_pkt_len) {
|
|
rte_errno = EOVERFLOW;
|
|
ERROR("%p: too many SGEs (%u) needed to handle"
|
|
" requested maximum packet size %u",
|
|
(void *)dev,
|
|
1 << sges_n,
|
|
dev->data->dev_conf.rxmode.max_rx_pkt_len);
|
|
goto error;
|
|
}
|
|
} else {
|
|
WARN("%p: the requested maximum Rx packet size (%u) is"
|
|
" larger than a single mbuf (%u) and scattered"
|
|
" mode has not been requested",
|
|
(void *)dev,
|
|
dev->data->dev_conf.rxmode.max_rx_pkt_len,
|
|
mb_len - RTE_PKTMBUF_HEADROOM);
|
|
}
|
|
DEBUG("%p: maximum number of segments per packet: %u",
|
|
(void *)dev, 1 << rxq->sges_n);
|
|
if (desc % (1 << rxq->sges_n)) {
|
|
rte_errno = EINVAL;
|
|
ERROR("%p: number of Rx queue descriptors (%u) is not a"
|
|
" multiple of maximum segments per packet (%u)",
|
|
(void *)dev,
|
|
desc,
|
|
1 << rxq->sges_n);
|
|
goto error;
|
|
}
|
|
if (mlx4_mr_btree_init(&rxq->mr_ctrl.cache_bh,
|
|
MLX4_MR_BTREE_CACHE_N, socket)) {
|
|
/* rte_errno is already set. */
|
|
goto error;
|
|
}
|
|
if (dev->data->dev_conf.intr_conf.rxq) {
|
|
rxq->channel = mlx4_glue->create_comp_channel(priv->ctx);
|
|
if (rxq->channel == NULL) {
|
|
rte_errno = ENOMEM;
|
|
ERROR("%p: Rx interrupt completion channel creation"
|
|
" failure: %s",
|
|
(void *)dev, strerror(rte_errno));
|
|
goto error;
|
|
}
|
|
if (mlx4_fd_set_non_blocking(rxq->channel->fd) < 0) {
|
|
ERROR("%p: unable to make Rx interrupt completion"
|
|
" channel non-blocking: %s",
|
|
(void *)dev, strerror(rte_errno));
|
|
goto error;
|
|
}
|
|
}
|
|
DEBUG("%p: adding Rx queue %p to list", (void *)dev, (void *)rxq);
|
|
dev->data->rx_queues[idx] = rxq;
|
|
return 0;
|
|
error:
|
|
dev->data->rx_queues[idx] = NULL;
|
|
ret = rte_errno;
|
|
mlx4_rx_queue_release(rxq);
|
|
rte_errno = ret;
|
|
assert(rte_errno > 0);
|
|
return -rte_errno;
|
|
}
|
|
|
|
/**
|
|
* DPDK callback to release a Rx queue.
|
|
*
|
|
* @param dpdk_rxq
|
|
* Generic Rx queue pointer.
|
|
*/
|
|
void
|
|
mlx4_rx_queue_release(void *dpdk_rxq)
|
|
{
|
|
struct rxq *rxq = (struct rxq *)dpdk_rxq;
|
|
struct priv *priv;
|
|
unsigned int i;
|
|
|
|
if (rxq == NULL)
|
|
return;
|
|
priv = rxq->priv;
|
|
for (i = 0; i != priv->dev->data->nb_rx_queues; ++i)
|
|
if (priv->dev->data->rx_queues[i] == rxq) {
|
|
DEBUG("%p: removing Rx queue %p from list",
|
|
(void *)priv->dev, (void *)rxq);
|
|
priv->dev->data->rx_queues[i] = NULL;
|
|
break;
|
|
}
|
|
assert(!rxq->cq);
|
|
assert(!rxq->wq);
|
|
assert(!rxq->wqes);
|
|
assert(!rxq->rq_db);
|
|
if (rxq->channel)
|
|
claim_zero(mlx4_glue->destroy_comp_channel(rxq->channel));
|
|
mlx4_mr_btree_free(&rxq->mr_ctrl.cache_bh);
|
|
rte_free(rxq);
|
|
}
|