include/linux/mlx5/eq.h

Source file repositories/reference/linux-study-clean/include/linux/mlx5/eq.h

File Facts

System
Linux kernel
Corpus path
include/linux/mlx5/eq.h
Extension
.h
Size
1761 bytes
Lines
64
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

struct mlx5_eq_param {
	int            nent;
	u64            mask[4];
	struct mlx5_irq *irq;
};

struct mlx5_eq *
mlx5_eq_create_generic(struct mlx5_core_dev *dev, struct mlx5_eq_param *param);
int
mlx5_eq_destroy_generic(struct mlx5_core_dev *dev, struct mlx5_eq *eq);
int mlx5_eq_enable(struct mlx5_core_dev *dev, struct mlx5_eq *eq,
		   struct notifier_block *nb);
void mlx5_eq_disable(struct mlx5_core_dev *dev, struct mlx5_eq *eq,
		     struct notifier_block *nb);

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 */

Annotation

Implementation Notes