91 lines
2.1 KiB
C
91 lines
2.1 KiB
C
/*
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* Copyright (C) 2018 Intel Corporation. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef COMMON_IRQ_H
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#define COMMON_IRQ_H
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enum irq_mode {
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IRQ_PULSE,
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IRQ_ASSERT,
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IRQ_DEASSERT,
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};
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enum irq_state {
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IRQ_NOT_ASSIGNED = 0,
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IRQ_ASSIGNED_SHARED,
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IRQ_ASSIGNED_NOSHARE,
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};
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enum irq_desc_state {
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IRQ_DESC_PENDING,
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IRQ_DESC_IN_PROCESS,
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};
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typedef int (*dev_handler_t)(int irq, void*);
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struct irq_request_info {
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/* vector set to 0xE0 ~ 0xFF for pri_register_handler
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* and set to VECTOR_INVALID for normal_register_handler
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*/
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uint32_t vector;
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dev_handler_t func;
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void *dev_data;
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bool share;
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bool lowpri;
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char *name;
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};
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/* any field change in below required irq_lock protection with irqsave */
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struct irq_desc {
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uint32_t irq; /* index to irq_desc_base */
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enum irq_state used; /* this irq have assigned to device */
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enum irq_desc_state state; /* irq_desc status */
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uint32_t vector; /* assigned vector */
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void *handler_data; /* irq_handler private data */
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int (*irq_handler)(struct irq_desc *irq_desc, void *handler_data);
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struct dev_handler_node *dev_list;
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spinlock_t irq_lock;
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uint64_t *irq_cnt; /* this irq cnt happened on CPUs */
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uint64_t irq_lost_cnt;
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};
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struct dev_handler_node {
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char name[32];
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void *dev_data;
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dev_handler_t dev_handler;
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struct dev_handler_node *next;
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struct irq_desc *desc;
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};
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uint32_t irq_mark_used(uint32_t irq);
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uint32_t irq_desc_alloc_vector(uint32_t irq, bool lowpri);
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void irq_desc_try_free_vector(uint32_t irq);
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uint32_t irq_to_vector(uint32_t irq);
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uint32_t dev_to_irq(struct dev_handler_node *node);
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uint32_t dev_to_vector(struct dev_handler_node *node);
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struct dev_handler_node*
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pri_register_handler(uint32_t irq,
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uint32_t vector,
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dev_handler_t func,
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void *dev_data,
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const char *name);
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struct dev_handler_node*
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normal_register_handler(uint32_t irq,
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dev_handler_t func,
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void *dev_data,
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bool share,
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bool lowpri,
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const char *name);
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void unregister_handler_common(struct dev_handler_node *node);
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typedef int (*irq_handler_t)(struct irq_desc*, void*);
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void update_irq_handler(uint32_t irq, irq_handler_t func);
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#endif /* COMMON_IRQ_H */
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