diff options
Diffstat (limited to 'drivers/infiniband/hw/mlx5/wr.h')
| -rw-r--r-- | drivers/infiniband/hw/mlx5/wr.h | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/mlx5/wr.h b/drivers/infiniband/hw/mlx5/wr.h new file mode 100644 index 000000000000..2dc89438000d --- /dev/null +++ b/drivers/infiniband/hw/mlx5/wr.h @@ -0,0 +1,136 @@ +/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */ +/* + * Copyright (c) 2020, Mellanox Technologies inc. All rights reserved. + */ + +#ifndef _MLX5_IB_WR_H +#define _MLX5_IB_WR_H + +#include "mlx5_ib.h" + +enum { + MLX5_IB_SQ_UMR_INLINE_THRESHOLD = 64, +}; + +struct mlx5_wqe_eth_pad { + u8 rsvd0[16]; +}; + + +/* get_sq_edge - Get the next nearby edge. + * + * An 'edge' is defined as the first following address after the end + * of the fragment or the SQ. Accordingly, during the WQE construction + * which repetitively increases the pointer to write the next data, it + * simply should check if it gets to an edge. + * + * @sq - SQ buffer. + * @idx - Stride index in the SQ buffer. + * + * Return: + * The new edge. + */ +static inline void *get_sq_edge(struct mlx5_ib_wq *sq, u32 idx) +{ + void *fragment_end; + + fragment_end = mlx5_frag_buf_get_wqe + (&sq->fbc, + mlx5_frag_buf_get_idx_last_contig_stride(&sq->fbc, idx)); + + return fragment_end + MLX5_SEND_WQE_BB; +} + +/* handle_post_send_edge - Check if we get to SQ edge. If yes, update to the + * next nearby edge and get new address translation for current WQE position. + * @sq: SQ buffer. + * @seg: Current WQE position (16B aligned). + * @wqe_sz: Total current WQE size [16B]. + * @cur_edge: Updated current edge. + */ +static inline void handle_post_send_edge(struct mlx5_ib_wq *sq, void **seg, + u32 wqe_sz, void **cur_edge) +{ + u32 idx; + + if (likely(*seg != *cur_edge)) + return; + + idx = (sq->cur_post + (wqe_sz >> 2)) & (sq->wqe_cnt - 1); + *cur_edge = get_sq_edge(sq, idx); + + *seg = mlx5_frag_buf_get_wqe(&sq->fbc, idx); +} + +/* mlx5r_memcpy_send_wqe - copy data from src to WQE and update the relevant + * WQ's pointers. At the end @seg is aligned to 16B regardless the copied size. + * @sq: SQ buffer. + * @cur_edge: Updated current edge. + * @seg: Current WQE position (16B aligned). + * @wqe_sz: Total current WQE size [16B]. + * @src: Pointer to copy from. + * @n: Number of bytes to copy. + */ +static inline void mlx5r_memcpy_send_wqe(struct mlx5_ib_wq *sq, void **cur_edge, + void **seg, u32 *wqe_sz, + const void *src, size_t n) +{ + while (likely(n)) { + size_t leftlen = *cur_edge - *seg; + size_t copysz = min_t(size_t, leftlen, n); + size_t stride; + + memcpy(*seg, src, copysz); + + n -= copysz; + src += copysz; + stride = !n ? ALIGN(copysz, 16) : copysz; + *seg += stride; + *wqe_sz += stride >> 4; + handle_post_send_edge(sq, seg, *wqe_sz, cur_edge); + } +} + +int mlx5r_wq_overflow(struct mlx5_ib_wq *wq, int nreq, struct ib_cq *ib_cq); +int mlx5r_begin_wqe(struct mlx5_ib_qp *qp, void **seg, + struct mlx5_wqe_ctrl_seg **ctrl, unsigned int *idx, + int *size, void **cur_edge, int nreq, __be32 general_id, + bool send_signaled, bool solicited); +void mlx5r_finish_wqe(struct mlx5_ib_qp *qp, struct mlx5_wqe_ctrl_seg *ctrl, + void *seg, u8 size, void *cur_edge, unsigned int idx, + u64 wr_id, int nreq, u8 fence, u32 mlx5_opcode); +void mlx5r_ring_db(struct mlx5_ib_qp *qp, unsigned int nreq, + struct mlx5_wqe_ctrl_seg *ctrl); +int mlx5_ib_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr, + const struct ib_send_wr **bad_wr, bool drain); +int mlx5_ib_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr, + const struct ib_recv_wr **bad_wr, bool drain); + +static inline int mlx5_ib_post_send_nodrain(struct ib_qp *ibqp, + const struct ib_send_wr *wr, + const struct ib_send_wr **bad_wr) +{ + return mlx5_ib_post_send(ibqp, wr, bad_wr, false); +} + +static inline int mlx5_ib_post_send_drain(struct ib_qp *ibqp, + const struct ib_send_wr *wr, + const struct ib_send_wr **bad_wr) +{ + return mlx5_ib_post_send(ibqp, wr, bad_wr, true); +} + +static inline int mlx5_ib_post_recv_nodrain(struct ib_qp *ibqp, + const struct ib_recv_wr *wr, + const struct ib_recv_wr **bad_wr) +{ + return mlx5_ib_post_recv(ibqp, wr, bad_wr, false); +} + +static inline int mlx5_ib_post_recv_drain(struct ib_qp *ibqp, + const struct ib_recv_wr *wr, + const struct ib_recv_wr **bad_wr) +{ + return mlx5_ib_post_recv(ibqp, wr, bad_wr, true); +} +#endif /* _MLX5_IB_WR_H */ |