26  * struct panthor_gpu - GPU block management data.
29 	/** @irq: GPU irq. */
35 	/** @pending_reqs: Pending GPU requests. */
38 	/** @reqs_acked: GPU request wait queue. */
87 		drm_warn(&ptdev->base, "GPU Fault 0x%08x (%s) at 0x%016llx\n",  in panthor_gpu_irq_handler()
92 		drm_warn(&ptdev->base, "GPU Fault in protected mode\n");  in panthor_gpu_irq_handler()
94 	spin_lock(&ptdev->gpu->reqs_lock);  in panthor_gpu_irq_handler()
95 	if (status & ptdev->gpu->pending_reqs) {  in panthor_gpu_irq_handler()
96 		ptdev->gpu->pending_reqs &= ~status;  in panthor_gpu_irq_handler()
97 		wake_up_all(&ptdev->gpu->reqs_acked);  in panthor_gpu_irq_handler()
99 	spin_unlock(&ptdev->gpu->reqs_lock);  in panthor_gpu_irq_handler()
101 PANTHOR_IRQ_HANDLER(gpu, GPU, panthor_gpu_irq_handler);
104  * panthor_gpu_unplug() - Called when the GPU is unplugged.
113 		panthor_gpu_irq_suspend(&ptdev->gpu->irq);  in panthor_gpu_unplug()
116 	spin_lock_irqsave(&ptdev->gpu->reqs_lock, flags);  in panthor_gpu_unplug()
117 	ptdev->gpu->pending_reqs = 0;  in panthor_gpu_unplug()
118 	wake_up_all(&ptdev->gpu->reqs_acked);  in panthor_gpu_unplug()
119 	spin_unlock_irqrestore(&ptdev->gpu->reqs_lock, flags);  in panthor_gpu_unplug()
123  * panthor_gpu_init() - Initialize the GPU block
130 	struct panthor_gpu *gpu;  in panthor_gpu_init()  local
134 	gpu = drmm_kzalloc(&ptdev->base, sizeof(*gpu), GFP_KERNEL);  in panthor_gpu_init()
135 	if (!gpu)  in panthor_gpu_init()
138 	spin_lock_init(&gpu->reqs_lock);  in panthor_gpu_init()
139 	init_waitqueue_head(&gpu->reqs_acked);  in panthor_gpu_init()
140 	mutex_init(&gpu->cache_flush_lock);  in panthor_gpu_init()
141 	ptdev->gpu = gpu;  in panthor_gpu_init()
149 	irq = platform_get_irq_byname(to_platform_device(ptdev->base.dev), "gpu");  in panthor_gpu_init()
153 	ret = panthor_request_gpu_irq(ptdev, &ptdev->gpu->irq, irq, GPU_INTERRUPTS_MASK);  in panthor_gpu_init()
161  * panthor_gpu_block_power_off() - Power-off a specific block of the GPU
203  * panthor_gpu_block_power_on() - Power-on a specific block of the GPU
296 	guard(mutex)(&ptdev->gpu->cache_flush_lock);  in panthor_gpu_flush_caches()
298 	spin_lock_irqsave(&ptdev->gpu->reqs_lock, flags);  in panthor_gpu_flush_caches()
300 			 ptdev->gpu->pending_reqs & GPU_IRQ_CLEAN_CACHES_COMPLETED)) {  in panthor_gpu_flush_caches()
301 		ptdev->gpu->pending_reqs |= GPU_IRQ_CLEAN_CACHES_COMPLETED;  in panthor_gpu_flush_caches()
304 	spin_unlock_irqrestore(&ptdev->gpu->reqs_lock, flags);  in panthor_gpu_flush_caches()
306 	if (!wait_event_timeout(ptdev->gpu->reqs_acked,  in panthor_gpu_flush_caches()
307 				!(ptdev->gpu->pending_reqs & GPU_IRQ_CLEAN_CACHES_COMPLETED),  in panthor_gpu_flush_caches()
309 		spin_lock_irqsave(&ptdev->gpu->reqs_lock, flags);  in panthor_gpu_flush_caches()
310 		if ((ptdev->gpu->pending_reqs & GPU_IRQ_CLEAN_CACHES_COMPLETED) != 0 &&  in panthor_gpu_flush_caches()
314 			ptdev->gpu->pending_reqs &= ~GPU_IRQ_CLEAN_CACHES_COMPLETED;  in panthor_gpu_flush_caches()
315 		spin_unlock_irqrestore(&ptdev->gpu->reqs_lock, flags);  in panthor_gpu_flush_caches()
337 	spin_lock_irqsave(&ptdev->gpu->reqs_lock, flags);  in panthor_gpu_soft_reset()
339 			 ptdev->gpu->pending_reqs & GPU_IRQ_RESET_COMPLETED)) {  in panthor_gpu_soft_reset()
340 		ptdev->gpu->pending_reqs |= GPU_IRQ_RESET_COMPLETED;  in panthor_gpu_soft_reset()
344 	spin_unlock_irqrestore(&ptdev->gpu->reqs_lock, flags);  in panthor_gpu_soft_reset()
346 	if (!wait_event_timeout(ptdev->gpu->reqs_acked,  in panthor_gpu_soft_reset()
347 				!(ptdev->gpu->pending_reqs & GPU_IRQ_RESET_COMPLETED),  in panthor_gpu_soft_reset()
349 		spin_lock_irqsave(&ptdev->gpu->reqs_lock, flags);  in panthor_gpu_soft_reset()
350 		if ((ptdev->gpu->pending_reqs & GPU_IRQ_RESET_COMPLETED) != 0 &&  in panthor_gpu_soft_reset()
354 			ptdev->gpu->pending_reqs &= ~GPU_IRQ_RESET_COMPLETED;  in panthor_gpu_soft_reset()
355 		spin_unlock_irqrestore(&ptdev->gpu->reqs_lock, flags);  in panthor_gpu_soft_reset()
367  * panthor_gpu_suspend() - Suspend the GPU block.
370  * Suspend the GPU irq. This should be called last in the suspend procedure,
381 	panthor_gpu_irq_suspend(&ptdev->gpu->irq);  in panthor_gpu_suspend()
385  * panthor_gpu_resume() - Resume the GPU block.
393 	panthor_gpu_irq_resume(&ptdev->gpu->irq, GPU_INTERRUPTS_MASK);  in panthor_gpu_resume()