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https://github.com/projectacrn/acrn-hypervisor.git
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a8cd6925fc
There are several similar irq handlers with confusing function names and it's not friendly to call update_irq_handler() to update a proper handler after request_irq(). With this commit, a single generic irq handler is being used, in which, no lock need to be acquired because our design could guarantee there is no concurrent irq handling and irq handler request/free. A flags field is added to irq_desc struct to select the proper processing flow for an irq. Irqflags is defined as follows: IRQF_NONE (0U) IRQF_LEVEL (1U << 1U) /* 1: level trigger; 0: edge trigger */ IRQF_PT (1U << 2U) /* 1: for passthrough dev */ Because we have only one irq handler, update_irq_handler() should be replace by set_irq_trigger_mode(), whichs set trigger mode flag of a certian irq. Accordingly, the code where called update_irq_handler() need to be updated. Signed-off-by: Yan, Like <like.yan@intel.com> Acked-by: Anthony Xu <anthony.xu@intel.com>
49 lines
1.1 KiB
C
49 lines
1.1 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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#define IRQF_NONE (0U)
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#define IRQF_LEVEL (1U << 1U) /* 1: level trigger; 0: edge trigger */
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#define IRQF_PT (1U << 2U) /* 1: for passthrough dev */
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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_use_state {
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IRQ_NOT_ASSIGNED = 0,
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IRQ_ASSIGNED,
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};
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typedef int (*irq_action_t)(uint32_t irq, void *priv_data);
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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_use_state used; /* this irq have assigned to device */
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uint32_t vector; /* assigned vector */
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irq_action_t action; /* callback registered from component */
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void *priv_data; /* irq_action private data */
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uint32_t flags; /* flags for trigger mode/ptdev */
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spinlock_t lock;
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};
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int32_t request_irq(uint32_t irq,
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irq_action_t action_fn,
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void *priv_data,
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uint32_t flags);
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void free_irq(uint32_t irq);
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void set_irq_trigger_mode(uint32_t irq, bool is_level_trigger);
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#endif /* COMMON_IRQ_H */
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