[linux-2.6-block.git] / drivers / net / ethernet / mellanox / mlx5 / core / wq.h

/*
 * 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__ */
Commit	Line	Data
e586b3b0 AV	1	/*
	2	* Copyright (c) 2013-2015, Mellanox Technologies, Ltd. All rights reserved.
	3	*
	4	* This software is available to you under a choice of one of two
	5	* licenses. You may choose to be licensed under the terms of the GNU
	6	* General Public License (GPL) Version 2, available from the file
	7	* COPYING in the main directory of this source tree, or the
	8	* OpenIB.org BSD license below:
	9	*
	10	* Redistribution and use in source and binary forms, with or
	11	* without modification, are permitted provided that the following
	12	* conditions are met:
	13	*
	14	* - Redistributions of source code must retain the above
	15	* copyright notice, this list of conditions and the following
	16	* disclaimer.
	17	*
	18	* - Redistributions in binary form must reproduce the above
	19	* copyright notice, this list of conditions and the following
	20	* disclaimer in the documentation and/or other materials
	21	* provided with the distribution.
	22	*
	23	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	24	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	25	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	26	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
	27	* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
	28	* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
	29	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	30	* SOFTWARE.
	31	*/
	32
	33	#ifndef __MLX5_WQ_H__
	34	#define __MLX5_WQ_H__
	35
	36	#include <linux/mlx5/mlx5_ifc.h>
	37
	38	struct mlx5_wq_param {
	39	int linear;
311c7c71 SM	40	int buf_numa_node;
311c7c71 SM	41	int db_numa_node;
e586b3b0 AV	42	};
	43
	44	struct mlx5_wq_ctrl {
	45	struct mlx5_core_dev *mdev;
	46	struct mlx5_buf buf;
	47	struct mlx5_db db;
	48	};
	49
	50	struct mlx5_wq_cyc {
	51	void *buf;
	52	__be32 *db;
	53	u16 sz_m1;
	54	u8 log_stride;
	55	};
	56
	57	struct mlx5_cqwq {
	58	void *buf;
	59	__be32 *db;
	60	u32 sz_m1;
	61	u32 cc; /* consumer counter */
	62	u8 log_sz;
	63	u8 log_stride;
	64	};
	65
	66	struct mlx5_wq_ll {
	67	void *buf;
	68	__be32 *db;
	69	__be16 *tail_next;
	70	u16 sz_m1;
	71	u16 head;
	72	u16 wqe_ctr;
	73	u16 cur_sz;
	74	u8 log_stride;
	75	};
	76
	77	int mlx5_wq_cyc_create(struct mlx5_core_dev mdev, struct mlx5_wq_param param,
	78	void wqc, struct mlx5_wq_cyc wq,
	79	struct mlx5_wq_ctrl *wq_ctrl);
	80	u32 mlx5_wq_cyc_get_size(struct mlx5_wq_cyc *wq);
	81
	82	int mlx5_cqwq_create(struct mlx5_core_dev mdev, struct mlx5_wq_param param,
	83	void cqc, struct mlx5_cqwq wq,
	84	struct mlx5_wq_ctrl *wq_ctrl);
	85	u32 mlx5_cqwq_get_size(struct mlx5_cqwq *wq);
	86
	87	int mlx5_wq_ll_create(struct mlx5_core_dev mdev, struct mlx5_wq_param param,
	88	void wqc, struct mlx5_wq_ll wq,
	89	struct mlx5_wq_ctrl *wq_ctrl);
	90	u32 mlx5_wq_ll_get_size(struct mlx5_wq_ll *wq);
	91
	92	void mlx5_wq_destroy(struct mlx5_wq_ctrl *wq_ctrl);
	93
	94	static inline u16 mlx5_wq_cyc_ctr2ix(struct mlx5_wq_cyc *wq, u16 ctr)
	95	{
	96	return ctr & wq->sz_m1;
	97	}
	98
	99	static inline void mlx5_wq_cyc_get_wqe(struct mlx5_wq_cyc wq, u16 ix)
	100	{
	101	return wq->buf + (ix << wq->log_stride);
	102	}
	103
	104	static inline int mlx5_wq_cyc_cc_bigger(u16 cc1, u16 cc2)
	105	{
106	int equal = (cc1 == cc2);
107	int smaller = 0x8000 & (cc1 - cc2);
108
109	return !equal && !smaller;
110	}
111
112	static inline u32 mlx5_cqwq_get_ci(struct mlx5_cqwq *wq)
113	{
114	return wq->cc & wq->sz_m1;
115	}
116
117	static inline void mlx5_cqwq_get_wqe(struct mlx5_cqwq wq, u32 ix)
118	{
119	return wq->buf + (ix << wq->log_stride);
120	}
121
122	static inline u32 mlx5_cqwq_get_wrap_cnt(struct mlx5_cqwq *wq)
123	{
124	return wq->cc >> wq->log_sz;
125	}
126
127	static inline void mlx5_cqwq_pop(struct mlx5_cqwq *wq)
128	{
129	wq->cc++;
130	}
131
132	static inline void mlx5_cqwq_update_db_record(struct mlx5_cqwq *wq)
133	{
134	*wq->db = cpu_to_be32(wq->cc & 0xffffff);
135	}
136
137	static inline int mlx5_wq_ll_is_full(struct mlx5_wq_ll *wq)
138	{
139	return wq->cur_sz == wq->sz_m1;
140	}
141
142	static inline int mlx5_wq_ll_is_empty(struct mlx5_wq_ll *wq)
143	{
144	return !wq->cur_sz;
145	}
146
147	static inline void mlx5_wq_ll_get_wqe(struct mlx5_wq_ll wq, u16 ix)
148	{
149	return wq->buf + (ix << wq->log_stride);
150	}
151
152	static inline void mlx5_wq_ll_push(struct mlx5_wq_ll *wq, u16 head_next)
153	{
154	wq->head = head_next;
155	wq->wqe_ctr++;
156	wq->cur_sz++;
157	}
158
159	static inline void mlx5_wq_ll_pop(struct mlx5_wq_ll *wq, __be16 ix,
160	__be16 *next_tail_next)
161	{
162	*wq->tail_next = ix;
163	wq->tail_next = next_tail_next;
164	wq->cur_sz--;
165	}
166
167	static inline void mlx5_wq_ll_update_db_record(struct mlx5_wq_ll *wq)
168	{
169	*wq->db = cpu_to_be32(wq->wqe_ctr);
170	}
171
172	#endif /* __MLX5_WQ_H__ */