1 files changed, 63 insertions, 0 deletions
diff --git a/include/linux/mlx5/eq.h b/include/linux/mlx5/eq.h
new file mode 100644
index 000000000..3705a3822
--- /dev/null
+++ b/include/linux/mlx5/eq.h
@@ -0,0 +1,63 @@
+/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
+/* Copyright (c) 2018 Mellanox Technologies. */
+
+#ifndef MLX5_CORE_EQ_H
+#define MLX5_CORE_EQ_H
+
+#define MLX5_NUM_CMD_EQE   (32)
+#define MLX5_NUM_ASYNC_EQE (0x1000)
+#define MLX5_NUM_SPARE_EQE (0x80)
+
+struct mlx5_eq;
+struct mlx5_irq;
+struct mlx5_core_dev;
+
+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 */