112 int gem_interrupts_init(struct gem_interrupts *irqs)  in gem_interrupts_init()  argument
114 	memset(irqs, 0, sizeof(*irqs));  in gem_interrupts_init()
116 	irqs->fd = perf_i915_open(I915_PMU_INTERRUPTS);  in gem_interrupts_init()
117 	if (irqs->fd < 0 && interrupts_read() < 0)  in gem_interrupts_init()
118 		irqs->error = ENODEV;  in gem_interrupts_init()
120 	return irqs->error;  in gem_interrupts_init()
123 int gem_interrupts_update(struct gem_interrupts *irqs)  in gem_interrupts_update()  argument
128 	if (irqs->error)  in gem_interrupts_update()
129 		return irqs->error;  in gem_interrupts_update()
131 	if (irqs->fd < 0) {  in gem_interrupts_update()
135 			return irqs->error = ENODEV;  in gem_interrupts_update()
141 		if (read(irqs->fd, data, sizeof(data)) < 0)  in gem_interrupts_update()
142 			return irqs->error = errno;  in gem_interrupts_update()
147 	update = irqs->last_count == 0;  in gem_interrupts_update()
148 	irqs->last_count = irqs->count;  in gem_interrupts_update()
149 	irqs->count = val;  in gem_interrupts_update()
150 	irqs->delta = irqs->count - irqs->last_count;  in gem_interrupts_update()