diff options
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core/lib/eq.h')
-rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/lib/eq.h | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/eq.h b/drivers/net/ethernet/mellanox/mlx5/core/lib/eq.h new file mode 100644 index 000000000000..c0fb6d72b695 --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/eq.h @@ -0,0 +1,98 @@ +/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */ +/* Copyright (c) 2018 Mellanox Technologies */ + +#ifndef __LIB_MLX5_EQ_H__ +#define __LIB_MLX5_EQ_H__ +#include <linux/mlx5/driver.h> +#include <linux/mlx5/eq.h> +#include <linux/mlx5/cq.h> + +#define MLX5_MAX_IRQ_NAME (32) +#define MLX5_EQE_SIZE (sizeof(struct mlx5_eqe)) + +struct mlx5_eq_tasklet { + struct list_head list; + struct list_head process_list; + struct tasklet_struct task; + spinlock_t lock; /* lock completion tasklet list */ +}; + +struct mlx5_cq_table { + spinlock_t lock; /* protect radix tree */ + struct radix_tree_root tree; +}; + +struct mlx5_eq { + struct mlx5_core_dev *dev; + struct mlx5_cq_table cq_table; + __be32 __iomem *doorbell; + u32 cons_index; + struct mlx5_frag_buf buf; + int size; + unsigned int vecidx; + unsigned int irqn; + u8 eqn; + int nent; + struct mlx5_rsc_debug *dbg; +}; + +struct mlx5_eq_comp { + struct mlx5_eq core; /* Must be first */ + struct mlx5_eq_tasklet tasklet_ctx; + struct list_head list; +}; + +static inline struct mlx5_eqe *get_eqe(struct mlx5_eq *eq, u32 entry) +{ + return mlx5_buf_offset(&eq->buf, entry * MLX5_EQE_SIZE); +} + +static inline struct mlx5_eqe *next_eqe_sw(struct mlx5_eq *eq) +{ + struct mlx5_eqe *eqe = get_eqe(eq, eq->cons_index & (eq->nent - 1)); + + return ((eqe->owner & 1) ^ !!(eq->cons_index & eq->nent)) ? NULL : eqe; +} + +static inline void eq_update_ci(struct mlx5_eq *eq, int arm) +{ + __be32 __iomem *addr = eq->doorbell + (arm ? 0 : 2); + u32 val = (eq->cons_index & 0xffffff) | (eq->eqn << 24); + + __raw_writel((__force u32)cpu_to_be32(val), addr); + /* We still want ordering, just not swabbing, so add a barrier */ + mb(); +} + +int mlx5_eq_table_init(struct mlx5_core_dev *dev); +void mlx5_eq_table_cleanup(struct mlx5_core_dev *dev); +int mlx5_eq_table_create(struct mlx5_core_dev *dev); +void mlx5_eq_table_destroy(struct mlx5_core_dev *dev); + +int mlx5_eq_add_cq(struct mlx5_eq *eq, struct mlx5_core_cq *cq); +int mlx5_eq_del_cq(struct mlx5_eq *eq, struct mlx5_core_cq *cq); +struct mlx5_eq_comp *mlx5_eqn2comp_eq(struct mlx5_core_dev *dev, int eqn); +struct mlx5_eq *mlx5_get_async_eq(struct mlx5_core_dev *dev); +void mlx5_cq_tasklet_cb(unsigned long data); +struct cpumask *mlx5_eq_comp_cpumask(struct mlx5_core_dev *dev, int ix); + +u32 mlx5_eq_poll_irq_disabled(struct mlx5_eq_comp *eq); +void mlx5_eq_synchronize_async_irq(struct mlx5_core_dev *dev); +void mlx5_eq_synchronize_cmd_irq(struct mlx5_core_dev *dev); + +int mlx5_debug_eq_add(struct mlx5_core_dev *dev, struct mlx5_eq *eq); +void mlx5_debug_eq_remove(struct mlx5_core_dev *dev, struct mlx5_eq *eq); +int mlx5_eq_debugfs_init(struct mlx5_core_dev *dev); +void mlx5_eq_debugfs_cleanup(struct mlx5_core_dev *dev); + +/* This function should only be called after mlx5_cmd_force_teardown_hca */ +void mlx5_core_eq_free_irqs(struct mlx5_core_dev *dev); + +#ifdef CONFIG_RFS_ACCEL +struct cpu_rmap *mlx5_eq_table_get_rmap(struct mlx5_core_dev *dev); +#endif + +int mlx5_eq_notifier_register(struct mlx5_core_dev *dev, struct mlx5_nb *nb); +int mlx5_eq_notifier_unregister(struct mlx5_core_dev *dev, struct mlx5_nb *nb); + +#endif |