[mirror_ubuntu-hirsute-kernel.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>
#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, u8 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 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);
}

#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>
4b673793	37	#include <linux/mlx5/cq.h>
3f2b7edd	38	#include <linux/mlx5/qp.h>
e586b3b0 AV	39
e586b3b0 AV	40	struct mlx5_wq_param {
311c7c71 SM	41	int buf_numa_node;
311c7c71 SM	42	int db_numa_node;
e586b3b0 AV	43	};
	44
	45	struct mlx5_wq_ctrl {
	46	struct mlx5_core_dev *mdev;
388ca8be	47	struct mlx5_frag_buf buf;
e586b3b0 AV	48	struct mlx5_db db;
	49	};
	50
	51	struct mlx5_wq_cyc {
3a2f7033	52	struct mlx5_frag_buf_ctrl fbc;
e586b3b0	53	__be32 *db;
99cbfa93 TT	54	u16 sz;
	55	u16 wqe_ctr;
	56	u16 cur_sz;
e586b3b0 AV	57	};
e586b3b0 AV	58
3f2b7edd IT	59	struct mlx5_wq_qp {
	60	struct mlx5_wq_cyc rq;
	61	struct mlx5_wq_cyc sq;
	62	};
	63
e586b3b0	64	struct mlx5_cqwq {
388ca8be YC	65	struct mlx5_frag_buf_ctrl fbc;
	66	__be32 *db;
	67	u32 cc; /* consumer counter */
e586b3b0 AV	68	};
	69
	70	struct mlx5_wq_ll {
3a2f7033	71	struct mlx5_frag_buf_ctrl fbc;
e586b3b0 AV	72	__be32 *db;
e586b3b0 AV	73	__be16 *tail_next;
e586b3b0 AV	74	u16 head;
	75	u16 wqe_ctr;
	76	u16 cur_sz;
e586b3b0 AV	77	};
	78
	79	int mlx5_wq_cyc_create(struct mlx5_core_dev mdev, struct mlx5_wq_param param,
	80	void wqc, struct mlx5_wq_cyc wq,
	81	struct mlx5_wq_ctrl *wq_ctrl);
130c7b46	82	void mlx5_wq_cyc_wqe_dump(struct mlx5_wq_cyc *wq, u16 ix, u8 nstrides);
5ee090ed	83	void mlx5_wq_cyc_reset(struct mlx5_wq_cyc *wq);
e586b3b0	84
3f2b7edd IT	85	int mlx5_wq_qp_create(struct mlx5_core_dev mdev, struct mlx5_wq_param param,
	86	void qpc, struct mlx5_wq_qp wq,
	87	struct mlx5_wq_ctrl *wq_ctrl);
	88
e586b3b0 AV	89	int mlx5_cqwq_create(struct mlx5_core_dev mdev, struct mlx5_wq_param param,
e586b3b0 AV	90	void cqc, struct mlx5_cqwq wq,
3a2f7033	91	struct mlx5_wq_ctrl *wq_ctrl);
e586b3b0 AV	92
	93	int mlx5_wq_ll_create(struct mlx5_core_dev mdev, struct mlx5_wq_param param,
	94	void wqc, struct mlx5_wq_ll wq,
	95	struct mlx5_wq_ctrl *wq_ctrl);
5ee090ed	96	void mlx5_wq_ll_reset(struct mlx5_wq_ll *wq);
e586b3b0 AV	97
	98	void mlx5_wq_destroy(struct mlx5_wq_ctrl *wq_ctrl);
	99
769619ee TT	100	static inline u32 mlx5_wq_cyc_get_size(struct mlx5_wq_cyc *wq)
	101	{
	102	return (u32)wq->fbc.sz_m1 + 1;
	103	}
	104
99cbfa93 TT	105	static inline int mlx5_wq_cyc_is_full(struct mlx5_wq_cyc *wq)
	106	{
	107	return wq->cur_sz == wq->sz;
	108	}
	109
	110	static inline int mlx5_wq_cyc_missing(struct mlx5_wq_cyc *wq)
	111	{
	112	return wq->sz - wq->cur_sz;
	113	}
	114
	115	static inline int mlx5_wq_cyc_is_empty(struct mlx5_wq_cyc *wq)
	116	{
	117	return !wq->cur_sz;
	118	}
	119
	120	static inline void mlx5_wq_cyc_push(struct mlx5_wq_cyc *wq)
	121	{
	122	wq->wqe_ctr++;
	123	wq->cur_sz++;
	124	}
	125
	126	static inline void mlx5_wq_cyc_push_n(struct mlx5_wq_cyc *wq, u8 n)
	127	{
	128	wq->wqe_ctr += n;
	129	wq->cur_sz += n;
	130	}
	131
	132	static inline void mlx5_wq_cyc_pop(struct mlx5_wq_cyc *wq)
	133	{
	134	wq->cur_sz--;
	135	}
	136
	137	static inline void mlx5_wq_cyc_update_db_record(struct mlx5_wq_cyc *wq)
	138	{
	139	*wq->db = cpu_to_be32(wq->wqe_ctr);
	140	}
	141
e586b3b0 AV	142	static inline u16 mlx5_wq_cyc_ctr2ix(struct mlx5_wq_cyc *wq, u16 ctr)
e586b3b0 AV	143	{
3a2f7033 TT	144	return ctr & wq->fbc.sz_m1;
	145	}
	146
99cbfa93 TT	147	static inline u16 mlx5_wq_cyc_get_head(struct mlx5_wq_cyc *wq)
	148	{
	149	return mlx5_wq_cyc_ctr2ix(wq, wq->wqe_ctr);
	150	}
	151
	152	static inline u16 mlx5_wq_cyc_get_tail(struct mlx5_wq_cyc *wq)
	153	{
	154	return mlx5_wq_cyc_ctr2ix(wq, wq->wqe_ctr - wq->cur_sz);
	155	}
	156
e586b3b0 AV	157	static inline void mlx5_wq_cyc_get_wqe(struct mlx5_wq_cyc wq, u16 ix)
e586b3b0 AV	158	{
3a2f7033	159	return mlx5_frag_buf_get_wqe(&wq->fbc, ix);
e586b3b0 AV	160	}
e586b3b0 AV	161
37fdffb2 TT	162	static inline u16 mlx5_wq_cyc_get_contig_wqebbs(struct mlx5_wq_cyc *wq, u16 ix)
	163	{
	164	return mlx5_frag_buf_get_idx_last_contig_stride(&wq->fbc, ix) - ix + 1;
	165	}
	166
e586b3b0 AV	167	static inline int mlx5_wq_cyc_cc_bigger(u16 cc1, u16 cc2)
	168	{
	169	int equal = (cc1 == cc2);
	170	int smaller = 0x8000 & (cc1 - cc2);
	171
	172	return !equal && !smaller;
	173	}
	174
769619ee TT	175	static inline u32 mlx5_cqwq_get_size(struct mlx5_cqwq *wq)
	176	{
	177	return wq->fbc.sz_m1 + 1;
	178	}
	179
	180	static inline u8 mlx5_cqwq_get_log_stride_size(struct mlx5_cqwq *wq)
	181	{
	182	return wq->fbc.log_stride;
	183	}
	184
ddf385e3 TT	185	static inline u32 mlx5_cqwq_ctr2ix(struct mlx5_cqwq *wq, u32 ctr)
	186	{
	187	return ctr & wq->fbc.sz_m1;
	188	}
	189
e586b3b0 AV	190	static inline u32 mlx5_cqwq_get_ci(struct mlx5_cqwq *wq)
e586b3b0 AV	191	{
ddf385e3	192	return mlx5_cqwq_ctr2ix(wq, wq->cc);
e586b3b0 AV	193	}
e586b3b0 AV	194
fe206c20	195	static inline struct mlx5_cqe64 mlx5_cqwq_get_wqe(struct mlx5_cqwq wq, u32 ix)
e586b3b0	196	{
939de57d DJ	197	struct mlx5_cqe64 *cqe = mlx5_frag_buf_get_wqe(&wq->fbc, ix);
	198
	199	/* For 128B CQEs the data is in the last 64B */
	200	cqe += wq->fbc.log_stride == 7;
	201
	202	return cqe;
e586b3b0 AV	203	}
e586b3b0 AV	204
ddf385e3 TT	205	static inline u32 mlx5_cqwq_get_ctr_wrap_cnt(struct mlx5_cqwq *wq, u32 ctr)
	206	{
	207	return ctr >> wq->fbc.log_sz;
	208	}
	209
e586b3b0 AV	210	static inline u32 mlx5_cqwq_get_wrap_cnt(struct mlx5_cqwq *wq)
e586b3b0 AV	211	{
ddf385e3	212	return mlx5_cqwq_get_ctr_wrap_cnt(wq, wq->cc);
e586b3b0 AV	213	}
	214
	215	static inline void mlx5_cqwq_pop(struct mlx5_cqwq *wq)
	216	{
	217	wq->cc++;
	218	}
	219
	220	static inline void mlx5_cqwq_update_db_record(struct mlx5_cqwq *wq)
	221	{
	222	*wq->db = cpu_to_be32(wq->cc & 0xffffff);
	223	}
	224
4b673793 IT	225	static inline struct mlx5_cqe64 mlx5_cqwq_get_cqe(struct mlx5_cqwq wq)
	226	{
	227	u32 ci = mlx5_cqwq_get_ci(wq);
	228	struct mlx5_cqe64 *cqe = mlx5_cqwq_get_wqe(wq, ci);
	229	u8 cqe_ownership_bit = cqe->op_own & MLX5_CQE_OWNER_MASK;
	230	u8 sw_ownership_val = mlx5_cqwq_get_wrap_cnt(wq) & 1;
	231
	232	if (cqe_ownership_bit != sw_ownership_val)
	233	return NULL;
	234
	235	/* ensure cqe content is read after cqe ownership bit */
	236	dma_rmb();
	237
	238	return cqe;
	239	}
	240
769619ee TT	241	static inline u32 mlx5_wq_ll_get_size(struct mlx5_wq_ll *wq)
	242	{
	243	return (u32)wq->fbc.sz_m1 + 1;
	244	}
	245
e586b3b0 AV	246	static inline int mlx5_wq_ll_is_full(struct mlx5_wq_ll *wq)
e586b3b0 AV	247	{
3a2f7033	248	return wq->cur_sz == wq->fbc.sz_m1;
e586b3b0 AV	249	}
	250
	251	static inline int mlx5_wq_ll_is_empty(struct mlx5_wq_ll *wq)
	252	{
	253	return !wq->cur_sz;
	254	}
	255
dc983f0e TT	256	static inline int mlx5_wq_ll_missing(struct mlx5_wq_ll *wq)
	257	{
	258	return wq->fbc.sz_m1 - wq->cur_sz;
	259	}
	260
e586b3b0 AV	261	static inline void mlx5_wq_ll_get_wqe(struct mlx5_wq_ll wq, u16 ix)
e586b3b0 AV	262	{
3a2f7033	263	return mlx5_frag_buf_get_wqe(&wq->fbc, ix);
e586b3b0 AV	264	}
e586b3b0 AV	265
fd9b4be8 TT	266	static inline u16 mlx5_wq_ll_get_wqe_next_ix(struct mlx5_wq_ll *wq, u16 ix)
	267	{
	268	struct mlx5_wqe_srq_next_seg *wqe = mlx5_wq_ll_get_wqe(wq, ix);
	269
	270	return be16_to_cpu(wqe->next_wqe_index);
	271	}
	272
e586b3b0 AV	273	static inline void mlx5_wq_ll_push(struct mlx5_wq_ll *wq, u16 head_next)
	274	{
	275	wq->head = head_next;
	276	wq->wqe_ctr++;
	277	wq->cur_sz++;
	278	}
	279
	280	static inline void mlx5_wq_ll_pop(struct mlx5_wq_ll *wq, __be16 ix,
	281	__be16 *next_tail_next)
	282	{
	283	*wq->tail_next = ix;
	284	wq->tail_next = next_tail_next;
	285	wq->cur_sz--;
	286	}
	287
	288	static inline void mlx5_wq_ll_update_db_record(struct mlx5_wq_ll *wq)
	289	{
	290	*wq->db = cpu_to_be32(wq->wqe_ctr);
	291	}
	292
	293	#endif /* __MLX5_WQ_H__ */