078b8b452e
This patch dissociates single-queue indirection tables and hash QP objects from Rx queue structures to relinquish their control to users through the RSS flow rule action, while simultaneously allowing multiple queues to be associated with RSS contexts. Flow rules share identical RSS contexts (hashed fields, hash key, target queues) to save on memory and other resources. The trade-off is some added complexity due to reference counters management on RSS contexts. The QUEUE action is re-implemented on top of an automatically-generated single-queue RSS context. The following hardware limitations apply to RSS contexts: - The number of queues in a group must be a power of two. - Queue indices must be consecutive, for instance the [0 1 2 3] set is allowed, however [3 2 1 0], [0 2 1 3] and [0 0 1 1 2 3 3 3] are not. - The first queue of a group must be aligned to a multiple of the context size, e.g. if queues [0 1 2 3 4] are defined globally, allowed group combinations are [0 1] and [2 3]; groups [1 2] and [3 4] are not supported. - RSS hash key, while configurable per context, must be exactly 40 bytes long. - The only supported hash algorithm is Toeplitz. Signed-off-by: Adrien Mazarguil <adrien.mazarguil@6wind.com> Acked-by: Nelio Laranjeiro <nelio.laranjeiro@6wind.com>
86 lines
3.3 KiB
C
86 lines
3.3 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright 2017 6WIND S.A.
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* Copyright 2017 Mellanox
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of 6WIND S.A. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef RTE_PMD_MLX4_FLOW_H_
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#define RTE_PMD_MLX4_FLOW_H_
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#include <stdint.h>
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#include <sys/queue.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/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_eth_ctrl.h>
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#include <rte_ethdev.h>
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#include <rte_flow.h>
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#include <rte_flow_driver.h>
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#include <rte_byteorder.h>
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/** Last and lowest priority level for a flow rule. */
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#define MLX4_FLOW_PRIORITY_LAST UINT32_C(0xfff)
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/** Meta pattern item used to distinguish internal rules. */
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#define MLX4_FLOW_ITEM_TYPE_INTERNAL ((enum rte_flow_item_type)-1)
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/** PMD-specific (mlx4) definition of a flow rule handle. */
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struct rte_flow {
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LIST_ENTRY(rte_flow) next; /**< Pointer to the next flow structure. */
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struct ibv_flow *ibv_flow; /**< Verbs flow. */
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struct ibv_flow_attr *ibv_attr; /**< Pointer to Verbs attributes. */
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uint32_t ibv_attr_size; /**< Size of Verbs attributes. */
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uint32_t select:1; /**< Used by operations on the linked list. */
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uint32_t internal:1; /**< Internal flow rule outside isolated mode. */
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uint32_t mac:1; /**< Rule associated with a configured MAC address. */
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uint32_t promisc:1; /**< This rule matches everything. */
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uint32_t allmulti:1; /**< This rule matches all multicast traffic. */
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uint32_t drop:1; /**< This rule drops packets. */
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struct mlx4_rss *rss; /**< Rx target. */
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};
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/* mlx4_flow.c */
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int mlx4_flow_sync(struct priv *priv, struct rte_flow_error *error);
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void mlx4_flow_clean(struct priv *priv);
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int mlx4_filter_ctrl(struct rte_eth_dev *dev,
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enum rte_filter_type filter_type,
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enum rte_filter_op filter_op,
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void *arg);
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#endif /* RTE_PMD_MLX4_FLOW_H_ */
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