1 /* SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0)
3 * Copyright 2013-2016 Freescale Semiconductor Inc.
11 struct process_interrupt {
13 irqreturn_t (*isr)(int irq, void *arg);
17 struct list_head node;
20 static COMPAT_LIST_HEAD(process_irq_list);
21 static pthread_mutex_t process_irq_lock = PTHREAD_MUTEX_INITIALIZER;
23 static void process_interrupt_install(struct process_interrupt *irq)
26 /* Add the irq to the end of the list */
27 ret = pthread_mutex_lock(&process_irq_lock);
29 list_add_tail(&irq->node, &process_irq_list);
30 ret = pthread_mutex_unlock(&process_irq_lock);
34 static void process_interrupt_remove(struct process_interrupt *irq)
38 ret = pthread_mutex_lock(&process_irq_lock);
41 ret = pthread_mutex_unlock(&process_irq_lock);
45 static struct process_interrupt *process_interrupt_find(int irq_num)
48 struct process_interrupt *i = NULL;
50 ret = pthread_mutex_lock(&process_irq_lock);
52 list_for_each_entry(i, &process_irq_list, node) {
53 if (i->irq == irq_num)
57 ret = pthread_mutex_unlock(&process_irq_lock);
62 /* This is the interface from the platform-agnostic driver code to (de)register
63 * interrupt handlers. We simply create/destroy corresponding structs.
65 int qbman_request_irq(int irq, irqreturn_t (*isr)(int irq, void *arg),
66 unsigned long flags, const char *name,
67 void *arg __maybe_unused)
69 struct process_interrupt *irq_node =
70 kmalloc(sizeof(*irq_node), GFP_KERNEL);
76 irq_node->flags = flags;
77 irq_node->name = name;
79 process_interrupt_install(irq_node);
83 int qbman_free_irq(int irq, __maybe_unused void *arg)
85 struct process_interrupt *irq_node = process_interrupt_find(irq);
89 process_interrupt_remove(irq_node);
94 /* This is the interface from the platform-specific driver code to obtain
95 * interrupt handlers that have been registered.
97 void qbman_invoke_irq(int irq)
99 struct process_interrupt *irq_node = process_interrupt_find(irq);
102 irq_node->isr(irq, irq_node->arg);