LXR linux/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
  11struct mlx5_eq;
  12struct mlx5_core_dev;
  13
  14struct mlx5_eq_param {
  15        u8             irq_index;
  16        int            nent;
  17        u64            mask[4];
  18        cpumask_var_t  affinity;
  19};
  20
  21struct mlx5_eq *
  22mlx5_eq_create_generic(struct mlx5_core_dev *dev, struct mlx5_eq_param *param);
  23int
  24mlx5_eq_destroy_generic(struct mlx5_core_dev *dev, struct mlx5_eq *eq);
  25int mlx5_eq_enable(struct mlx5_core_dev *dev, struct mlx5_eq *eq,
  26                   struct notifier_block *nb);
  27void mlx5_eq_disable(struct mlx5_core_dev *dev, struct mlx5_eq *eq,
  28                     struct notifier_block *nb);
  29
  30struct mlx5_eqe *mlx5_eq_get_eqe(struct mlx5_eq *eq, u32 cc);
  31void 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 */
  41static 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
  50struct 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