diff options
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core/wq.h')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/wq.h | 308 |
1 files changed, 308 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/wq.h b/drivers/net/ethernet/mellanox/mlx5/core/wq.h new file mode 100644 index 000000000..4d629e5dd --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/wq.h @@ -0,0 +1,308 @@ +/* + * Copyright (c) 2013-2015, Mellanox Technologies, Ltd. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#ifndef __MLX5_WQ_H__ +#define __MLX5_WQ_H__ + +#include <linux/mlx5/mlx5_ifc.h> +#include <linux/mlx5/cq.h> +#include <linux/mlx5/qp.h> + +struct mlx5_wq_param { + int buf_numa_node; + int db_numa_node; +}; + +struct mlx5_wq_ctrl { + struct mlx5_core_dev *mdev; + struct mlx5_frag_buf buf; + struct mlx5_db db; +}; + +struct mlx5_wq_cyc { + struct mlx5_frag_buf_ctrl fbc; + __be32 *db; + u16 sz; + u16 wqe_ctr; + u16 cur_sz; +}; + +struct mlx5_wq_qp { + struct mlx5_wq_cyc rq; + struct mlx5_wq_cyc sq; +}; + +struct mlx5_cqwq { + struct mlx5_frag_buf_ctrl fbc; + __be32 *db; + u32 cc; /* consumer counter */ +}; + +struct mlx5_wq_ll { + struct mlx5_frag_buf_ctrl fbc; + __be32 *db; + __be16 *tail_next; + u16 head; + u16 wqe_ctr; + u16 cur_sz; +}; + +int mlx5_wq_cyc_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param, + void *wqc, struct mlx5_wq_cyc *wq, + struct mlx5_wq_ctrl *wq_ctrl); +void mlx5_wq_cyc_wqe_dump(struct mlx5_wq_cyc *wq, u16 ix, u8 nstrides); +void mlx5_wq_cyc_reset(struct mlx5_wq_cyc *wq); + +int mlx5_wq_qp_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param, + void *qpc, struct mlx5_wq_qp *wq, + struct mlx5_wq_ctrl *wq_ctrl); + +int mlx5_cqwq_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param, + void *cqc, struct mlx5_cqwq *wq, + struct mlx5_wq_ctrl *wq_ctrl); + +int mlx5_wq_ll_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param, + void *wqc, struct mlx5_wq_ll *wq, + struct mlx5_wq_ctrl *wq_ctrl); +void mlx5_wq_ll_reset(struct mlx5_wq_ll *wq); + +void mlx5_wq_destroy(struct mlx5_wq_ctrl *wq_ctrl); + +static inline u32 mlx5_wq_cyc_get_size(struct mlx5_wq_cyc *wq) +{ + return (u32)wq->fbc.sz_m1 + 1; +} + +static inline int mlx5_wq_cyc_is_full(struct mlx5_wq_cyc *wq) +{ + return wq->cur_sz == wq->sz; +} + +static inline int mlx5_wq_cyc_missing(struct mlx5_wq_cyc *wq) +{ + return wq->sz - wq->cur_sz; +} + +static inline int mlx5_wq_cyc_is_empty(struct mlx5_wq_cyc *wq) +{ + return !wq->cur_sz; +} + +static inline void mlx5_wq_cyc_push(struct mlx5_wq_cyc *wq) +{ + wq->wqe_ctr++; + wq->cur_sz++; +} + +static inline void mlx5_wq_cyc_push_n(struct mlx5_wq_cyc *wq, u16 n) +{ + wq->wqe_ctr += n; + wq->cur_sz += n; +} + +static inline void mlx5_wq_cyc_pop(struct mlx5_wq_cyc *wq) +{ + wq->cur_sz--; +} + +static inline void mlx5_wq_cyc_update_db_record(struct mlx5_wq_cyc *wq) +{ + *wq->db = cpu_to_be32(wq->wqe_ctr); +} + +static inline u16 mlx5_wq_cyc_ctr2ix(struct mlx5_wq_cyc *wq, u16 ctr) +{ + return ctr & wq->fbc.sz_m1; +} + +static inline u16 mlx5_wq_cyc_get_head(struct mlx5_wq_cyc *wq) +{ + return mlx5_wq_cyc_ctr2ix(wq, wq->wqe_ctr); +} + +static inline u16 mlx5_wq_cyc_get_tail(struct mlx5_wq_cyc *wq) +{ + return mlx5_wq_cyc_ctr2ix(wq, wq->wqe_ctr - wq->cur_sz); +} + +static inline void *mlx5_wq_cyc_get_wqe(struct mlx5_wq_cyc *wq, u16 ix) +{ + return mlx5_frag_buf_get_wqe(&wq->fbc, ix); +} + +static inline u16 mlx5_wq_cyc_get_contig_wqebbs(struct mlx5_wq_cyc *wq, u16 ix) +{ + return mlx5_frag_buf_get_idx_last_contig_stride(&wq->fbc, ix) - ix + 1; +} + +static inline int mlx5_wq_cyc_cc_bigger(u16 cc1, u16 cc2) +{ + int equal = (cc1 == cc2); + int smaller = 0x8000 & (cc1 - cc2); + + return !equal && !smaller; +} + +static inline u16 mlx5_wq_cyc_get_counter(struct mlx5_wq_cyc *wq) +{ + return wq->wqe_ctr; +} + +static inline u32 mlx5_cqwq_get_size(struct mlx5_cqwq *wq) +{ + return wq->fbc.sz_m1 + 1; +} + +static inline u8 mlx5_cqwq_get_log_stride_size(struct mlx5_cqwq *wq) +{ + return wq->fbc.log_stride; +} + +static inline u32 mlx5_cqwq_ctr2ix(struct mlx5_cqwq *wq, u32 ctr) +{ + return ctr & wq->fbc.sz_m1; +} + +static inline u32 mlx5_cqwq_get_ci(struct mlx5_cqwq *wq) +{ + return mlx5_cqwq_ctr2ix(wq, wq->cc); +} + +static inline struct mlx5_cqe64 *mlx5_cqwq_get_wqe(struct mlx5_cqwq *wq, u32 ix) +{ + struct mlx5_cqe64 *cqe = mlx5_frag_buf_get_wqe(&wq->fbc, ix); + + /* For 128B CQEs the data is in the last 64B */ + cqe += wq->fbc.log_stride == 7; + + return cqe; +} + +static inline u32 mlx5_cqwq_get_ctr_wrap_cnt(struct mlx5_cqwq *wq, u32 ctr) +{ + return ctr >> wq->fbc.log_sz; +} + +static inline u32 mlx5_cqwq_get_wrap_cnt(struct mlx5_cqwq *wq) +{ + return mlx5_cqwq_get_ctr_wrap_cnt(wq, wq->cc); +} + +static inline void mlx5_cqwq_pop(struct mlx5_cqwq *wq) +{ + wq->cc++; +} + +static inline void mlx5_cqwq_update_db_record(struct mlx5_cqwq *wq) +{ + *wq->db = cpu_to_be32(wq->cc & 0xffffff); +} + +static inline struct mlx5_cqe64 *mlx5_cqwq_get_cqe(struct mlx5_cqwq *wq) +{ + u32 ci = mlx5_cqwq_get_ci(wq); + struct mlx5_cqe64 *cqe = mlx5_cqwq_get_wqe(wq, ci); + u8 cqe_ownership_bit = cqe->op_own & MLX5_CQE_OWNER_MASK; + u8 sw_ownership_val = mlx5_cqwq_get_wrap_cnt(wq) & 1; + + if (cqe_ownership_bit != sw_ownership_val) + return NULL; + + /* ensure cqe content is read after cqe ownership bit */ + dma_rmb(); + + return cqe; +} + +static inline u32 mlx5_wq_ll_get_size(struct mlx5_wq_ll *wq) +{ + return (u32)wq->fbc.sz_m1 + 1; +} + +static inline int mlx5_wq_ll_is_full(struct mlx5_wq_ll *wq) +{ + return wq->cur_sz == wq->fbc.sz_m1; +} + +static inline int mlx5_wq_ll_is_empty(struct mlx5_wq_ll *wq) +{ + return !wq->cur_sz; +} + +static inline int mlx5_wq_ll_missing(struct mlx5_wq_ll *wq) +{ + return wq->fbc.sz_m1 - wq->cur_sz; +} + +static inline void *mlx5_wq_ll_get_wqe(struct mlx5_wq_ll *wq, u16 ix) +{ + return mlx5_frag_buf_get_wqe(&wq->fbc, ix); +} + +static inline u16 mlx5_wq_ll_get_wqe_next_ix(struct mlx5_wq_ll *wq, u16 ix) +{ + struct mlx5_wqe_srq_next_seg *wqe = mlx5_wq_ll_get_wqe(wq, ix); + + return be16_to_cpu(wqe->next_wqe_index); +} + +static inline void mlx5_wq_ll_push(struct mlx5_wq_ll *wq, u16 head_next) +{ + wq->head = head_next; + wq->wqe_ctr++; + wq->cur_sz++; +} + +static inline void mlx5_wq_ll_pop(struct mlx5_wq_ll *wq, __be16 ix, + __be16 *next_tail_next) +{ + *wq->tail_next = ix; + wq->tail_next = next_tail_next; + wq->cur_sz--; +} + +static inline void mlx5_wq_ll_update_db_record(struct mlx5_wq_ll *wq) +{ + *wq->db = cpu_to_be32(wq->wqe_ctr); +} + +static inline u16 mlx5_wq_ll_get_head(struct mlx5_wq_ll *wq) +{ + return wq->head; +} + +static inline u16 mlx5_wq_ll_get_counter(struct mlx5_wq_ll *wq) +{ + return wq->wqe_ctr; +} + +#endif /* __MLX5_WQ_H__ */ |