include/linux/mlx5/eq.h

   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 */