41 int amdgpu_ih_ring_init(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih,  in amdgpu_ih_ring_init()  argument
50 	ih->ring_size = ring_size;  in amdgpu_ih_ring_init()
51 	ih->ptr_mask = ih->ring_size - 1;  in amdgpu_ih_ring_init()
52 	ih->rptr = 0;  in amdgpu_ih_ring_init()
53 	ih->use_bus_addr = use_bus_addr;  in amdgpu_ih_ring_init()
58 		if (ih->ring)  in amdgpu_ih_ring_init()
64 		ih->ring = dma_alloc_coherent(adev->dev, ih->ring_size + 8,  in amdgpu_ih_ring_init()
66 		if (ih->ring == NULL)  in amdgpu_ih_ring_init()
69 		ih->gpu_addr = dma_addr;  in amdgpu_ih_ring_init()
70 		ih->wptr_addr = dma_addr + ih->ring_size;  in amdgpu_ih_ring_init()
71 		ih->wptr_cpu = &ih->ring[ih->ring_size / 4];  in amdgpu_ih_ring_init()
72 		ih->rptr_addr = dma_addr + ih->ring_size + 4;  in amdgpu_ih_ring_init()
73 		ih->rptr_cpu = &ih->ring[(ih->ring_size / 4) + 1];  in amdgpu_ih_ring_init()
87 		r = amdgpu_bo_create_kernel(adev, ih->ring_size, PAGE_SIZE,  in amdgpu_ih_ring_init()
89 					    &ih->ring_obj, &ih->gpu_addr,  in amdgpu_ih_ring_init()
90 					    (void **)&ih->ring);  in amdgpu_ih_ring_init()
97 		ih->wptr_addr = adev->wb.gpu_addr + wptr_offs * 4;  in amdgpu_ih_ring_init()
98 		ih->wptr_cpu = &adev->wb.wb[wptr_offs];  in amdgpu_ih_ring_init()
99 		ih->rptr_addr = adev->wb.gpu_addr + rptr_offs * 4;  in amdgpu_ih_ring_init()
100 		ih->rptr_cpu = &adev->wb.wb[rptr_offs];  in amdgpu_ih_ring_init()
114 void amdgpu_ih_ring_fini(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih)  in amdgpu_ih_ring_fini()  argument
116 	if (ih->use_bus_addr) {  in amdgpu_ih_ring_fini()
117 		if (!ih->ring)  in amdgpu_ih_ring_fini()
123 		dma_free_coherent(adev->dev, ih->ring_size + 8,  in amdgpu_ih_ring_fini()
124 				  (void *)ih->ring, ih->gpu_addr);  in amdgpu_ih_ring_fini()
125 		ih->ring = NULL;  in amdgpu_ih_ring_fini()
127 		amdgpu_bo_free_kernel(&ih->ring_obj, &ih->gpu_addr,  in amdgpu_ih_ring_fini()
128 				      (void **)&ih->ring);  in amdgpu_ih_ring_fini()
129 		amdgpu_device_wb_free(adev, (ih->wptr_addr - ih->gpu_addr) / 4);  in amdgpu_ih_ring_fini()
130 		amdgpu_device_wb_free(adev, (ih->rptr_addr - ih->gpu_addr) / 4);  in amdgpu_ih_ring_fini()
143 int amdgpu_ih_process(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih)  in amdgpu_ih_process()  argument
148 	if (!ih->enabled || adev->shutdown)  in amdgpu_ih_process()
151 	wptr = amdgpu_ih_get_wptr(adev, ih);  in amdgpu_ih_process()
155 	if (atomic_xchg(&ih->lock, 1))  in amdgpu_ih_process()
158 	DRM_DEBUG("%s: rptr %d, wptr %d\n", __func__, ih->rptr, wptr);  in amdgpu_ih_process()
163 	while (ih->rptr != wptr && --count) {  in amdgpu_ih_process()
164 		amdgpu_irq_dispatch(adev, ih);  in amdgpu_ih_process()
165 		ih->rptr &= ih->ptr_mask;  in amdgpu_ih_process()
168 	amdgpu_ih_set_rptr(adev, ih);  in amdgpu_ih_process()
169 	atomic_set(&ih->lock, 0);  in amdgpu_ih_process()
172 	wptr = amdgpu_ih_get_wptr(adev, ih);  in amdgpu_ih_process()
173 	if (wptr != ih->rptr)  in amdgpu_ih_process()