[deliverable/linux.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		numa;
};

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;
	40	int numa;
	41	};
	42
	43	struct mlx5_wq_ctrl {
	44	struct mlx5_core_dev *mdev;
	45	struct mlx5_buf buf;
	46	struct mlx5_db db;
	47	};
	48
	49	struct mlx5_wq_cyc {
	50	void *buf;
	51	__be32 *db;
	52	u16 sz_m1;
	53	u8 log_stride;
	54	};
	55
	56	struct mlx5_cqwq {
	57	void *buf;
	58	__be32 *db;
	59	u32 sz_m1;
	60	u32 cc; /* consumer counter */
	61	u8 log_sz;
	62	u8 log_stride;
	63	};
	64
65	struct mlx5_wq_ll {
66	void *buf;
67	__be32 *db;
68	__be16 *tail_next;
69	u16 sz_m1;
70	u16 head;
71	u16 wqe_ctr;
72	u16 cur_sz;
73	u8 log_stride;
74	};
75
76	int mlx5_wq_cyc_create(struct mlx5_core_dev mdev, struct mlx5_wq_param param,
77	void wqc, struct mlx5_wq_cyc wq,
78	struct mlx5_wq_ctrl *wq_ctrl);
79	u32 mlx5_wq_cyc_get_size(struct mlx5_wq_cyc *wq);
80
81	int mlx5_cqwq_create(struct mlx5_core_dev mdev, struct mlx5_wq_param param,
82	void cqc, struct mlx5_cqwq wq,
83	struct mlx5_wq_ctrl *wq_ctrl);
84	u32 mlx5_cqwq_get_size(struct mlx5_cqwq *wq);
85
86	int mlx5_wq_ll_create(struct mlx5_core_dev mdev, struct mlx5_wq_param param,
87	void wqc, struct mlx5_wq_ll wq,
88	struct mlx5_wq_ctrl *wq_ctrl);
89	u32 mlx5_wq_ll_get_size(struct mlx5_wq_ll *wq);
90
91	void mlx5_wq_destroy(struct mlx5_wq_ctrl *wq_ctrl);
92
93	static inline u16 mlx5_wq_cyc_ctr2ix(struct mlx5_wq_cyc *wq, u16 ctr)
94	{
95	return ctr & wq->sz_m1;
96	}
97
98	static inline void mlx5_wq_cyc_get_wqe(struct mlx5_wq_cyc wq, u16 ix)
99	{
100	return wq->buf + (ix << wq->log_stride);
101	}
102
103	static inline int mlx5_wq_cyc_cc_bigger(u16 cc1, u16 cc2)
104	{
105	int equal = (cc1 == cc2);
106	int smaller = 0x8000 & (cc1 - cc2);
107
108	return !equal && !smaller;
109	}
110
111	static inline u32 mlx5_cqwq_get_ci(struct mlx5_cqwq *wq)
112	{
113	return wq->cc & wq->sz_m1;
114	}
115
116	static inline void mlx5_cqwq_get_wqe(struct mlx5_cqwq wq, u32 ix)
117	{
118	return wq->buf + (ix << wq->log_stride);
119	}
120
121	static inline u32 mlx5_cqwq_get_wrap_cnt(struct mlx5_cqwq *wq)
122	{
123	return wq->cc >> wq->log_sz;
124	}
125
126	static inline void mlx5_cqwq_pop(struct mlx5_cqwq *wq)
127	{
128	wq->cc++;
129	}
130
131	static inline void mlx5_cqwq_update_db_record(struct mlx5_cqwq *wq)
132	{
133	*wq->db = cpu_to_be32(wq->cc & 0xffffff);
134	}
135
136	static inline int mlx5_wq_ll_is_full(struct mlx5_wq_ll *wq)
137	{
138	return wq->cur_sz == wq->sz_m1;
139	}
140
141	static inline int mlx5_wq_ll_is_empty(struct mlx5_wq_ll *wq)
142	{
143	return !wq->cur_sz;
144	}
145
146	static inline void mlx5_wq_ll_get_wqe(struct mlx5_wq_ll wq, u16 ix)
147	{
148	return wq->buf + (ix << wq->log_stride);
149	}
150
151	static inline void mlx5_wq_ll_push(struct mlx5_wq_ll *wq, u16 head_next)
152	{
153	wq->head = head_next;
154	wq->wqe_ctr++;
155	wq->cur_sz++;
156	}
157
158	static inline void mlx5_wq_ll_pop(struct mlx5_wq_ll *wq, __be16 ix,
159	__be16 *next_tail_next)
160	{
161	*wq->tail_next = ix;
162	wq->tail_next = next_tail_next;
163	wq->cur_sz--;
164	}
165
166	static inline void mlx5_wq_ll_update_db_record(struct mlx5_wq_ll *wq)
167	{
168	*wq->db = cpu_to_be32(wq->wqe_ctr);
169	}
170
171	#endif /* __MLX5_WQ_H__ */