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44 struct process_interrupt {
46 irqreturn_t (*isr)(int irq, void *arg);
50 struct list_head node;
53 static COMPAT_LIST_HEAD(process_irq_list);
54 static pthread_mutex_t process_irq_lock = PTHREAD_MUTEX_INITIALIZER;
56 static void process_interrupt_install(struct process_interrupt *irq)
59 /* Add the irq to the end of the list */
60 ret = pthread_mutex_lock(&process_irq_lock);
62 list_add_tail(&irq->node, &process_irq_list);
63 ret = pthread_mutex_unlock(&process_irq_lock);
67 static void process_interrupt_remove(struct process_interrupt *irq)
71 ret = pthread_mutex_lock(&process_irq_lock);
74 ret = pthread_mutex_unlock(&process_irq_lock);
78 static struct process_interrupt *process_interrupt_find(int irq_num)
81 struct process_interrupt *i = NULL;
83 ret = pthread_mutex_lock(&process_irq_lock);
85 list_for_each_entry(i, &process_irq_list, node) {
86 if (i->irq == irq_num)
90 ret = pthread_mutex_unlock(&process_irq_lock);
95 /* This is the interface from the platform-agnostic driver code to (de)register
96 * interrupt handlers. We simply create/destroy corresponding structs.
98 int qbman_request_irq(int irq, irqreturn_t (*isr)(int irq, void *arg),
99 unsigned long flags, const char *name,
100 void *arg __maybe_unused)
102 struct process_interrupt *irq_node =
103 kmalloc(sizeof(*irq_node), GFP_KERNEL);
109 irq_node->flags = flags;
110 irq_node->name = name;
112 process_interrupt_install(irq_node);
116 int qbman_free_irq(int irq, __maybe_unused void *arg)
118 struct process_interrupt *irq_node = process_interrupt_find(irq);
122 process_interrupt_remove(irq_node);
127 /* This is the interface from the platform-specific driver code to obtain
128 * interrupt handlers that have been registered.
130 void qbman_invoke_irq(int irq)
132 struct process_interrupt *irq_node = process_interrupt_find(irq);
135 irq_node->isr(irq, irq_node->arg);