1 /* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
2 /* Copyright (c) 2018 Mellanox Technologies. */
3
4 #ifndef MLX5_CORE_EQ_H
5 #define MLX5_CORE_EQ_H
6
7 #define MLX5_NUM_CMD_EQE (32)
8 #define MLX5_NUM_ASYNC_EQE (0x1000)
9 #define MLX5_NUM_SPARE_EQE (0x80)
10
11 struct mlx5_eq;
12 struct mlx5_irq;
13 struct mlx5_core_dev;
14
15 struct mlx5_eq_param {
16 int nent;
17 u64 mask[4];
18 struct mlx5_irq *irq;
19 };
20
21 struct mlx5_eq *
22 mlx5_eq_create_generic(struct mlx5_core_dev *dev, struct mlx5_eq_param *param);
23 int
24 mlx5_eq_destroy_generic(struct mlx5_core_dev *dev, struct mlx5_eq *eq);
25 int mlx5_eq_enable(struct mlx5_core_dev *dev, struct mlx5_eq *eq,
26 struct notifier_block *nb);
27 void mlx5_eq_disable(struct mlx5_core_dev *dev, struct mlx5_eq *eq,
28 struct notifier_block *nb);
29
30 struct mlx5_eqe *mlx5_eq_get_eqe(struct mlx5_eq *eq, u32 cc);
31 void mlx5_eq_update_ci(struct mlx5_eq *eq, u32 cc, bool arm);
32
33 /* The HCA will think the queue has overflowed if we
34 * don't tell it we've been processing events. We
35 * create EQs with MLX5_NUM_SPARE_EQE extra entries,
36 * so we must update our consumer index at
37 * least that often.
38 *
39 * mlx5_eq_update_cc must be called on every EQE @EQ irq handler
40 */
41 static inline u32 mlx5_eq_update_cc(struct mlx5_eq *eq, u32 cc)
42 {
43 if (unlikely(cc >= MLX5_NUM_SPARE_EQE)) {
44 mlx5_eq_update_ci(eq, cc, 0);
45 cc = 0;
46 }
47 return cc;
48 }
49
50 struct mlx5_nb {
51 struct notifier_block nb;
52 u8 event_type;
53 };
54
55 #define mlx5_nb_cof(ptr, type, member) \
56 (container_of(container_of(ptr, struct mlx5_nb, nb), type, member))
57
58 #define MLX5_NB_INIT(name, handler, event) do { \
59 (name)->nb.notifier_call = handler; \
60 (name)->event_type = MLX5_EVENT_TYPE_##event; \
61 } while (0)
62
63 #endif /* MLX5_CORE_EQ_H */
64
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