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f891b7cdbd
Prior to this patch the driver requires two IRQs to function properly, one required IRQ for control and at least one required IRQ for IO. This requirement can be relaxed to one as the driver now allows sharing of IRQs, so control and IO EQs can share the same irq. This is needed for high scale amount of VFs. Signed-off-by: Shay Drory <shayd@nvidia.com> Reviewed-by: Moshe Shemesh <moshe@nvidia.com> Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
64 lines
1.7 KiB
C
64 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
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/* Copyright (c) 2018 Mellanox Technologies. */
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#ifndef MLX5_CORE_EQ_H
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#define MLX5_CORE_EQ_H
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#define MLX5_NUM_CMD_EQE (32)
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#define MLX5_NUM_ASYNC_EQE (0x1000)
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#define MLX5_NUM_SPARE_EQE (0x80)
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struct mlx5_eq;
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struct mlx5_core_dev;
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struct mlx5_eq_param {
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u8 irq_index;
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int nent;
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u64 mask[4];
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cpumask_var_t affinity;
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};
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struct mlx5_eq *
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mlx5_eq_create_generic(struct mlx5_core_dev *dev, struct mlx5_eq_param *param);
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int
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mlx5_eq_destroy_generic(struct mlx5_core_dev *dev, struct mlx5_eq *eq);
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int mlx5_eq_enable(struct mlx5_core_dev *dev, struct mlx5_eq *eq,
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struct notifier_block *nb);
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void mlx5_eq_disable(struct mlx5_core_dev *dev, struct mlx5_eq *eq,
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struct notifier_block *nb);
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struct mlx5_eqe *mlx5_eq_get_eqe(struct mlx5_eq *eq, u32 cc);
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void mlx5_eq_update_ci(struct mlx5_eq *eq, u32 cc, bool arm);
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/* The HCA will think the queue has overflowed if we
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* don't tell it we've been processing events. We
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* create EQs with MLX5_NUM_SPARE_EQE extra entries,
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* so we must update our consumer index at
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* least that often.
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*
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* mlx5_eq_update_cc must be called on every EQE @EQ irq handler
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*/
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static inline u32 mlx5_eq_update_cc(struct mlx5_eq *eq, u32 cc)
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{
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if (unlikely(cc >= MLX5_NUM_SPARE_EQE)) {
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mlx5_eq_update_ci(eq, cc, 0);
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cc = 0;
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}
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return cc;
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}
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struct mlx5_nb {
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struct notifier_block nb;
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u8 event_type;
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};
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#define mlx5_nb_cof(ptr, type, member) \
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(container_of(container_of(ptr, struct mlx5_nb, nb), type, member))
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#define MLX5_NB_INIT(name, handler, event) do { \
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(name)->nb.notifier_call = handler; \
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(name)->event_type = MLX5_EVENT_TYPE_##event; \
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} while (0)
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#endif /* MLX5_CORE_EQ_H */
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