summaryrefslogtreecommitdiff
path: root/include/linux/mlx5/eq.h
blob: 00045cc4ea1118d9636c67d6f3acda1374326aa3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
/* Copyright (c) 2018 Mellanox Technologies. */

#ifndef MLX5_CORE_EQ_H
#define MLX5_CORE_EQ_H

enum {
	MLX5_EQ_PAGEREQ_IDX        = 0,
	MLX5_EQ_CMD_IDX            = 1,
	MLX5_EQ_ASYNC_IDX          = 2,
	/* reserved to be used by mlx5_core ulps (mlx5e/mlx5_ib) */
	MLX5_EQ_PFAULT_IDX         = 3,
	MLX5_EQ_MAX_ASYNC_EQS,
	/* completion eqs vector indices start here */
	MLX5_EQ_VEC_COMP_BASE = MLX5_EQ_MAX_ASYNC_EQS,
};

#define MLX5_NUM_CMD_EQE   (32)
#define MLX5_NUM_ASYNC_EQE (0x1000)
#define MLX5_NUM_SPARE_EQE (0x80)

struct mlx5_eq;
struct mlx5_core_dev;

struct mlx5_eq_param {
	u8             index;
	int            nent;
	u64            mask;
	void          *context;
	irq_handler_t  handler;
};

struct mlx5_eq *
mlx5_eq_create_generic(struct mlx5_core_dev *dev, const char *name,
		       struct mlx5_eq_param *param);
int
mlx5_eq_destroy_generic(struct mlx5_core_dev *dev, struct mlx5_eq *eq);

struct mlx5_eqe *mlx5_eq_get_eqe(struct mlx5_eq *eq, u32 cc);
void mlx5_eq_update_ci(struct mlx5_eq *eq, u32 cc, bool arm);

/* The HCA will think the queue has overflowed if we
 * don't tell it we've been processing events.  We
 * create EQs with MLX5_NUM_SPARE_EQE extra entries,
 * so we must update our consumer index at
 * least that often.
 *
 * mlx5_eq_update_cc must be called on every EQE @EQ irq handler
 */
static inline u32 mlx5_eq_update_cc(struct mlx5_eq *eq, u32 cc)
{
	if (unlikely(cc >= MLX5_NUM_SPARE_EQE)) {
		mlx5_eq_update_ci(eq, cc, 0);
		cc = 0;
	}
	return cc;
}

struct mlx5_nb {
	struct notifier_block nb;
	u8 event_type;
};

#define mlx5_nb_cof(ptr, type, member) \
	(container_of(container_of(ptr, struct mlx5_nb, nb), type, member))

#define MLX5_NB_INIT(name, handler, event) do {              \
	(name)->nb.notifier_call = handler;                  \
	(name)->event_type = MLX5_EVENT_TYPE_##event;        \
} while (0)

#endif /* MLX5_CORE_EQ_H */