mirror of https://github.com/F-Stack/f-stack.git
104 lines
2.4 KiB
C
104 lines
2.4 KiB
C
/* SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0)
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*
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* Copyright 2013-2016 Freescale Semiconductor Inc.
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* Copyright 2017 NXP
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*
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*/
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#include <process.h>
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#include "dpaa_sys.h"
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struct process_interrupt {
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int irq;
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irqreturn_t (*isr)(int irq, void *arg);
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unsigned long flags;
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const char *name;
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void *arg;
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struct list_head node;
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};
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static COMPAT_LIST_HEAD(process_irq_list);
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static pthread_mutex_t process_irq_lock = PTHREAD_MUTEX_INITIALIZER;
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static void process_interrupt_install(struct process_interrupt *irq)
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{
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int ret;
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/* Add the irq to the end of the list */
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ret = pthread_mutex_lock(&process_irq_lock);
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assert(!ret);
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list_add_tail(&irq->node, &process_irq_list);
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ret = pthread_mutex_unlock(&process_irq_lock);
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assert(!ret);
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}
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static void process_interrupt_remove(struct process_interrupt *irq)
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{
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int ret;
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ret = pthread_mutex_lock(&process_irq_lock);
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assert(!ret);
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list_del(&irq->node);
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ret = pthread_mutex_unlock(&process_irq_lock);
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assert(!ret);
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}
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static struct process_interrupt *process_interrupt_find(int irq_num)
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{
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int ret;
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struct process_interrupt *i = NULL;
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ret = pthread_mutex_lock(&process_irq_lock);
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assert(!ret);
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list_for_each_entry(i, &process_irq_list, node) {
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if (i->irq == irq_num)
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goto done;
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}
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done:
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ret = pthread_mutex_unlock(&process_irq_lock);
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assert(!ret);
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return i;
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}
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/* This is the interface from the platform-agnostic driver code to (de)register
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* interrupt handlers. We simply create/destroy corresponding structs.
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*/
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int qbman_request_irq(int irq, irqreturn_t (*isr)(int irq, void *arg),
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unsigned long flags, const char *name,
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void *arg __maybe_unused)
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{
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struct process_interrupt *irq_node =
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kmalloc(sizeof(*irq_node), GFP_KERNEL);
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if (!irq_node)
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return -ENOMEM;
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irq_node->irq = irq;
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irq_node->isr = isr;
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irq_node->flags = flags;
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irq_node->name = name;
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irq_node->arg = arg;
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process_interrupt_install(irq_node);
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return 0;
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}
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int qbman_free_irq(int irq, __maybe_unused void *arg)
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{
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struct process_interrupt *irq_node = process_interrupt_find(irq);
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if (!irq_node)
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return -EINVAL;
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process_interrupt_remove(irq_node);
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kfree(irq_node);
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return 0;
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}
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/* This is the interface from the platform-specific driver code to obtain
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* interrupt handlers that have been registered.
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*/
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void qbman_invoke_irq(int irq)
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{
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struct process_interrupt *irq_node = process_interrupt_find(irq);
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if (irq_node)
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irq_node->isr(irq, irq_node->arg);
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}
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