8688b2f8a8
Rework Work Queue Element (aka WQE) structures to fit PMD needs. A WQE is an aggregation of 16 bytes elements known as "data segments" (aka dseg). The only common part is the first two elements i.e. the control one to define the job type, and the Ethernet segment which embed offload requests with other information, after that, it can have: - a raw data packet, - a data pointer to the packet itself, - both. Signed-off-by: Nelio Laranjeiro <nelio.laranjeiro@6wind.com>
138 lines
3.9 KiB
C
138 lines
3.9 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright 2016 6WIND S.A.
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* Copyright 2016 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_MLX5_PRM_H_
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#define RTE_PMD_MLX5_PRM_H_
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/* Verbs header. */
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/* ISO C doesn't support unnamed structs/unions, disabling -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/mlx5_hw.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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/* Get CQE owner bit. */
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#define MLX5_CQE_OWNER(op_own) ((op_own) & MLX5_CQE_OWNER_MASK)
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/* Get CQE format. */
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#define MLX5_CQE_FORMAT(op_own) (((op_own) & MLX5E_CQE_FORMAT_MASK) >> 2)
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/* Get CQE opcode. */
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#define MLX5_CQE_OPCODE(op_own) (((op_own) & 0xf0) >> 4)
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/* Get CQE solicited event. */
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#define MLX5_CQE_SE(op_own) (((op_own) >> 1) & 1)
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/* Invalidate a CQE. */
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#define MLX5_CQE_INVALIDATE (MLX5_CQE_INVALID << 4)
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/* CQE value to inform that VLAN is stripped. */
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#define MLX5_CQE_VLAN_STRIPPED 0x1
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/* Maximum number of packets a multi-packet WQE can handle. */
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#define MLX5_MPW_DSEG_MAX 5
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/* WQE DWORD size */
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#define MLX5_WQE_DWORD_SIZE 16
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/* WQE size */
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#define MLX5_WQE_SIZE (4 * MLX5_WQE_DWORD_SIZE)
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/* Compute the number of DS. */
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#define MLX5_WQE_DS(n) \
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(((n) + MLX5_WQE_DWORD_SIZE - 1) / MLX5_WQE_DWORD_SIZE)
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/* Room for inline data in multi-packet WQE. */
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#define MLX5_MWQE64_INL_DATA 28
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/* Subset of struct mlx5_wqe_eth_seg. */
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struct mlx5_wqe_eth_seg_small {
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uint32_t rsvd0;
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uint8_t cs_flags;
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uint8_t rsvd1;
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uint16_t mss;
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uint32_t rsvd2;
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uint16_t inline_hdr_sz;
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uint8_t inline_hdr[2];
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};
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struct mlx5_wqe_inl_small {
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uint32_t byte_cnt;
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uint8_t raw;
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};
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/* Small common part of the WQE. */
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struct mlx5_wqe {
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uint32_t ctrl[4];
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struct mlx5_wqe_eth_seg_small eseg;
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};
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/* WQE. */
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struct mlx5_wqe64 {
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struct mlx5_wqe hdr;
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uint8_t raw[32];
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} __rte_aligned(64);
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/* MPW session status. */
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enum mlx5_mpw_state {
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MLX5_MPW_STATE_OPENED,
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MLX5_MPW_INL_STATE_OPENED,
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MLX5_MPW_STATE_CLOSED,
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};
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/* MPW session descriptor. */
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struct mlx5_mpw {
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enum mlx5_mpw_state state;
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unsigned int pkts_n;
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unsigned int len;
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unsigned int total_len;
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volatile struct mlx5_wqe *wqe;
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union {
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volatile struct mlx5_wqe_data_seg *dseg[MLX5_MPW_DSEG_MAX];
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volatile uint8_t *raw;
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} data;
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};
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/* CQ element structure - should be equal to the cache line size */
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struct mlx5_cqe {
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#if (RTE_CACHE_LINE_SIZE == 128)
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uint8_t padding[64];
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#endif
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struct mlx5_cqe64 cqe64;
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};
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#endif /* RTE_PMD_MLX5_PRM_H_ */
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