diff options
author | José Pekkarinen <jose.pekkarinen@nokia.com> | 2016-04-11 10:41:07 +0300 |
---|---|---|
committer | José Pekkarinen <jose.pekkarinen@nokia.com> | 2016-04-13 08:17:18 +0300 |
commit | e09b41010ba33a20a87472ee821fa407a5b8da36 (patch) | |
tree | d10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/drivers/net/ethernet/mellanox/mlx5/core/wq.h | |
parent | f93b97fd65072de626c074dbe099a1fff05ce060 (diff) |
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page.
During the rebasing, the following patch collided:
Force tick interrupt and get rid of softirq magic(I70131fb85).
Collisions have been removed because its logic was found on the
source already.
Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/drivers/net/ethernet/mellanox/mlx5/core/wq.h')
-rw-r--r-- | kernel/drivers/net/ethernet/mellanox/mlx5/core/wq.h | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/kernel/drivers/net/ethernet/mellanox/mlx5/core/wq.h b/kernel/drivers/net/ethernet/mellanox/mlx5/core/wq.h new file mode 100644 index 000000000..6c2a8f950 --- /dev/null +++ b/kernel/drivers/net/ethernet/mellanox/mlx5/core/wq.h @@ -0,0 +1,172 @@ +/* + * 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> + +struct mlx5_wq_param { + int linear; + int buf_numa_node; + int db_numa_node; +}; + +struct mlx5_wq_ctrl { + struct mlx5_core_dev *mdev; + struct mlx5_buf buf; + struct mlx5_db db; +}; + +struct mlx5_wq_cyc { + void *buf; + __be32 *db; + u16 sz_m1; + u8 log_stride; +}; + +struct mlx5_cqwq { + void *buf; + __be32 *db; + u32 sz_m1; + u32 cc; /* consumer counter */ + u8 log_sz; + u8 log_stride; +}; + +struct mlx5_wq_ll { + void *buf; + __be32 *db; + __be16 *tail_next; + u16 sz_m1; + u16 head; + u16 wqe_ctr; + u16 cur_sz; + u8 log_stride; +}; + +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); +u32 mlx5_wq_cyc_get_size(struct mlx5_wq_cyc *wq); + +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); +u32 mlx5_cqwq_get_size(struct mlx5_cqwq *wq); + +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); +u32 mlx5_wq_ll_get_size(struct mlx5_wq_ll *wq); + +void mlx5_wq_destroy(struct mlx5_wq_ctrl *wq_ctrl); + +static inline u16 mlx5_wq_cyc_ctr2ix(struct mlx5_wq_cyc *wq, u16 ctr) +{ + return ctr & wq->sz_m1; +} + +static inline void *mlx5_wq_cyc_get_wqe(struct mlx5_wq_cyc *wq, u16 ix) +{ + return wq->buf + (ix << wq->log_stride); +} + +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 u32 mlx5_cqwq_get_ci(struct mlx5_cqwq *wq) +{ + return wq->cc & wq->sz_m1; +} + +static inline void *mlx5_cqwq_get_wqe(struct mlx5_cqwq *wq, u32 ix) +{ + return wq->buf + (ix << wq->log_stride); +} + +static inline u32 mlx5_cqwq_get_wrap_cnt(struct mlx5_cqwq *wq) +{ + return wq->cc >> wq->log_sz; +} + +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 int mlx5_wq_ll_is_full(struct mlx5_wq_ll *wq) +{ + return wq->cur_sz == wq->sz_m1; +} + +static inline int mlx5_wq_ll_is_empty(struct mlx5_wq_ll *wq) +{ + return !wq->cur_sz; +} + +static inline void *mlx5_wq_ll_get_wqe(struct mlx5_wq_ll *wq, u16 ix) +{ + return wq->buf + (ix << wq->log_stride); +} + +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); +} + +#endif /* __MLX5_WQ_H__ */ |