1/*-
2 * Copyright (c) 2013-2015, Mellanox Technologies, Ltd.  All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS `AS IS' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 *
25 * $FreeBSD: releng/11.0/sys/dev/mlx5/cq.h 290650 2015-11-10 12:20:22Z hselasky $
26 */
27
28#ifndef MLX5_CORE_CQ_H
29#define MLX5_CORE_CQ_H
30
31#include <rdma/ib_verbs.h>
32#include <dev/mlx5/driver.h>
33#include <dev/mlx5/mlx5_ifc.h>
34
35
36struct mlx5_core_cq {
37	u32			cqn;
38	int			cqe_sz;
39	__be32		       *set_ci_db;
40	__be32		       *arm_db;
41	atomic_t		refcount;
42	struct completion	free;
43	unsigned		vector;
44	int			irqn;
45	void (*comp)		(struct mlx5_core_cq *);
46	void (*event)		(struct mlx5_core_cq *, int);
47	struct mlx5_uar	       *uar;
48	u32			cons_index;
49	unsigned		arm_sn;
50	struct mlx5_rsc_debug	*dbg;
51	int			pid;
52};
53
54
55enum {
56	MLX5_CQE_SYNDROME_LOCAL_LENGTH_ERR		= 0x01,
57	MLX5_CQE_SYNDROME_LOCAL_QP_OP_ERR		= 0x02,
58	MLX5_CQE_SYNDROME_LOCAL_PROT_ERR		= 0x04,
59	MLX5_CQE_SYNDROME_WR_FLUSH_ERR			= 0x05,
60	MLX5_CQE_SYNDROME_MW_BIND_ERR			= 0x06,
61	MLX5_CQE_SYNDROME_BAD_RESP_ERR			= 0x10,
62	MLX5_CQE_SYNDROME_LOCAL_ACCESS_ERR		= 0x11,
63	MLX5_CQE_SYNDROME_REMOTE_INVAL_REQ_ERR		= 0x12,
64	MLX5_CQE_SYNDROME_REMOTE_ACCESS_ERR		= 0x13,
65	MLX5_CQE_SYNDROME_REMOTE_OP_ERR			= 0x14,
66	MLX5_CQE_SYNDROME_TRANSPORT_RETRY_EXC_ERR	= 0x15,
67	MLX5_CQE_SYNDROME_RNR_RETRY_EXC_ERR		= 0x16,
68	MLX5_CQE_SYNDROME_REMOTE_ABORTED_ERR		= 0x22,
69};
70
71enum {
72	MLX5_CQE_OWNER_MASK	= 1,
73	MLX5_CQE_REQ		= 0,
74	MLX5_CQE_RESP_WR_IMM	= 1,
75	MLX5_CQE_RESP_SEND	= 2,
76	MLX5_CQE_RESP_SEND_IMM	= 3,
77	MLX5_CQE_RESP_SEND_INV	= 4,
78	MLX5_CQE_RESIZE_CQ	= 5,
79	MLX5_CQE_SIG_ERR	= 12,
80	MLX5_CQE_REQ_ERR	= 13,
81	MLX5_CQE_RESP_ERR	= 14,
82	MLX5_CQE_INVALID	= 15,
83};
84
85enum {
86	MLX5_CQ_MODIFY_PERIOD	= 1 << 0,
87	MLX5_CQ_MODIFY_COUNT	= 1 << 1,
88	MLX5_CQ_MODIFY_OVERRUN	= 1 << 2,
89};
90
91enum {
92	MLX5_CQ_OPMOD_RESIZE		= 1,
93	MLX5_MODIFY_CQ_MASK_LOG_SIZE	= 1 << 0,
94	MLX5_MODIFY_CQ_MASK_PG_OFFSET	= 1 << 1,
95	MLX5_MODIFY_CQ_MASK_PG_SIZE	= 1 << 2,
96};
97
98struct mlx5_cq_modify_params {
99	int	type;
100	union {
101		struct {
102			u32	page_offset;
103			u8	log_cq_size;
104		} resize;
105
106		struct {
107		} moder;
108
109		struct {
110		} mapping;
111	} params;
112};
113
114static inline int cqe_sz_to_mlx_sz(u8 size)
115{
116	return size == 64 ? CQE_SIZE_64 : CQE_SIZE_128;
117}
118
119static inline void mlx5_cq_set_ci(struct mlx5_core_cq *cq)
120{
121	*cq->set_ci_db = cpu_to_be32(cq->cons_index & 0xffffff);
122}
123
124enum {
125	MLX5_CQ_DB_REQ_NOT_SOL		= 1 << 24,
126	MLX5_CQ_DB_REQ_NOT		= 0 << 24
127};
128
129static inline void mlx5_cq_arm(struct mlx5_core_cq *cq, u32 cmd,
130			       void __iomem *uar_page,
131			       spinlock_t *doorbell_lock,
132			       u32 cons_index)
133{
134	__be32 doorbell[2];
135	u32 sn;
136	u32 ci;
137
138	sn = cq->arm_sn & 3;
139	ci = cons_index & 0xffffff;
140
141	*cq->arm_db = cpu_to_be32(sn << 28 | cmd | ci);
142
143	/* Make sure that the doorbell record in host memory is
144	 * written before ringing the doorbell via PCI MMIO.
145	 */
146	wmb();
147
148	doorbell[0] = cpu_to_be32(sn << 28 | cmd | ci);
149	doorbell[1] = cpu_to_be32(cq->cqn);
150
151	mlx5_write64(doorbell, uar_page + MLX5_CQ_DOORBELL, doorbell_lock);
152}
153
154int mlx5_init_cq_table(struct mlx5_core_dev *dev);
155void mlx5_cleanup_cq_table(struct mlx5_core_dev *dev);
156int mlx5_core_create_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq,
157			struct mlx5_create_cq_mbox_in *in, int inlen);
158int mlx5_core_destroy_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq);
159int mlx5_core_query_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq,
160		       struct mlx5_query_cq_mbox_out *out);
161int mlx5_core_modify_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq,
162			struct mlx5_modify_cq_mbox_in *in, int in_sz);
163int mlx5_core_modify_cq_moderation(struct mlx5_core_dev *dev,
164				   struct mlx5_core_cq *cq, u16 cq_period,
165				   u16 cq_max_count);
166int mlx5_debug_cq_add(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq);
167void mlx5_debug_cq_remove(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq);
168
169#endif /* MLX5_CORE_CQ_H */
170