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