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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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ca390799c2
Multiple EQs may share the same IRQ in subsequent patches. Instead of calling the IRQ handler directly, the EQ will register to an atomic chain notfier. The Linux built-in shared IRQ is not used because it forces the caller to disable the IRQ and clear affinity before free_irq() can be called. This patch is the first step in the separation of IRQ and EQ logic. Signed-off-by: Yuval Avnery <yuvalav@mellanox.com> Reviewed-by: Parav Pandit <parav@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
72 lines
1.9 KiB
C
72 lines
1.9 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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enum {
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MLX5_EQ_PAGEREQ_IDX = 0,
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MLX5_EQ_CMD_IDX = 1,
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MLX5_EQ_ASYNC_IDX = 2,
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/* reserved to be used by mlx5_core ulps (mlx5e/mlx5_ib) */
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MLX5_EQ_PFAULT_IDX = 3,
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MLX5_EQ_MAX_ASYNC_EQS,
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/* completion eqs vector indices start here */
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MLX5_EQ_VEC_COMP_BASE = MLX5_EQ_MAX_ASYNC_EQS,
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};
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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 index;
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int nent;
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u64 mask;
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struct notifier_block *nb;
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};
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struct mlx5_eq *
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mlx5_eq_create_generic(struct mlx5_core_dev *dev, const char *name,
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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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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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