26 #define VFIO_PLATFORM_IS_ACPI(vdev) ((vdev)->acpihid != NULL)  argument
50 static int vfio_platform_acpi_probe(struct vfio_platform_device *vdev,  in vfio_platform_acpi_probe()  argument
61 			vdev->name);  in vfio_platform_acpi_probe()
66 	vdev->acpihid = acpi_device_hid(adev);  in vfio_platform_acpi_probe()
68 	return WARN_ON(!vdev->acpihid) ? -EINVAL : 0;  in vfio_platform_acpi_probe()
71 static int vfio_platform_acpi_call_reset(struct vfio_platform_device *vdev,  in vfio_platform_acpi_call_reset()  argument
75 	struct device *dev = vdev->device;  in vfio_platform_acpi_call_reset()
92 static bool vfio_platform_acpi_has_reset(struct vfio_platform_device *vdev)  in vfio_platform_acpi_has_reset()  argument
95 	struct device *dev = vdev->device;  in vfio_platform_acpi_has_reset()
104 static bool vfio_platform_has_reset(struct vfio_platform_device *vdev)  in vfio_platform_has_reset()  argument
106 	if (VFIO_PLATFORM_IS_ACPI(vdev))  in vfio_platform_has_reset()
107 		return vfio_platform_acpi_has_reset(vdev);  in vfio_platform_has_reset()
109 	return vdev->of_reset ? true : false;  in vfio_platform_has_reset()
112 static int vfio_platform_get_reset(struct vfio_platform_device *vdev)  in vfio_platform_get_reset()  argument
114 	if (VFIO_PLATFORM_IS_ACPI(vdev))  in vfio_platform_get_reset()
115 		return vfio_platform_acpi_has_reset(vdev) ? 0 : -ENOENT;  in vfio_platform_get_reset()
117 	vdev->of_reset = vfio_platform_lookup_reset(vdev->compat,  in vfio_platform_get_reset()
118 						    &vdev->reset_module);  in vfio_platform_get_reset()
119 	if (!vdev->of_reset) {  in vfio_platform_get_reset()
120 		request_module("vfio-reset:%s", vdev->compat);  in vfio_platform_get_reset()
121 		vdev->of_reset = vfio_platform_lookup_reset(vdev->compat,  in vfio_platform_get_reset()
122 							&vdev->reset_module);  in vfio_platform_get_reset()
125 	return vdev->of_reset ? 0 : -ENOENT;  in vfio_platform_get_reset()
128 static void vfio_platform_put_reset(struct vfio_platform_device *vdev)  in vfio_platform_put_reset()  argument
130 	if (VFIO_PLATFORM_IS_ACPI(vdev))  in vfio_platform_put_reset()
133 	if (vdev->of_reset)  in vfio_platform_put_reset()
134 		module_put(vdev->reset_module);  in vfio_platform_put_reset()
137 static int vfio_platform_regions_init(struct vfio_platform_device *vdev)  in vfio_platform_regions_init()  argument
141 	while (vdev->get_resource(vdev, cnt))  in vfio_platform_regions_init()
144 	vdev->regions = kcalloc(cnt, sizeof(struct vfio_platform_region),  in vfio_platform_regions_init()
146 	if (!vdev->regions)  in vfio_platform_regions_init()
151 			vdev->get_resource(vdev, i);  in vfio_platform_regions_init()
153 		vdev->regions[i].addr = res->start;  in vfio_platform_regions_init()
154 		vdev->regions[i].size = resource_size(res);  in vfio_platform_regions_init()
155 		vdev->regions[i].flags = 0;  in vfio_platform_regions_init()
159 			vdev->regions[i].type = VFIO_PLATFORM_REGION_TYPE_MMIO;  in vfio_platform_regions_init()
160 			vdev->regions[i].flags |= VFIO_REGION_INFO_FLAG_READ;  in vfio_platform_regions_init()
162 				vdev->regions[i].flags |=  in vfio_platform_regions_init()
169 			if (!(vdev->regions[i].addr & ~PAGE_MASK) &&  in vfio_platform_regions_init()
170 					!(vdev->regions[i].size & ~PAGE_MASK))  in vfio_platform_regions_init()
171 				vdev->regions[i].flags |=  in vfio_platform_regions_init()
176 			vdev->regions[i].type = VFIO_PLATFORM_REGION_TYPE_PIO;  in vfio_platform_regions_init()
183 	vdev->num_regions = cnt;  in vfio_platform_regions_init()
187 	kfree(vdev->regions);  in vfio_platform_regions_init()
191 static void vfio_platform_regions_cleanup(struct vfio_platform_device *vdev)  in vfio_platform_regions_cleanup()  argument
195 	for (i = 0; i < vdev->num_regions; i++)  in vfio_platform_regions_cleanup()
196 		iounmap(vdev->regions[i].ioaddr);  in vfio_platform_regions_cleanup()
198 	vdev->num_regions = 0;  in vfio_platform_regions_cleanup()
199 	kfree(vdev->regions);  in vfio_platform_regions_cleanup()
202 static int vfio_platform_call_reset(struct vfio_platform_device *vdev,  in vfio_platform_call_reset()  argument
205 	if (VFIO_PLATFORM_IS_ACPI(vdev)) {  in vfio_platform_call_reset()
206 		dev_info(vdev->device, "reset\n");  in vfio_platform_call_reset()
207 		return vfio_platform_acpi_call_reset(vdev, extra_dbg);  in vfio_platform_call_reset()
208 	} else if (vdev->of_reset) {  in vfio_platform_call_reset()
209 		dev_info(vdev->device, "reset\n");  in vfio_platform_call_reset()
210 		return vdev->of_reset(vdev);  in vfio_platform_call_reset()
213 	dev_warn(vdev->device, "no reset function found!\n");  in vfio_platform_call_reset()
219 	struct vfio_platform_device *vdev =  in vfio_platform_close_device()  local
220 		container_of(core_vdev, struct vfio_platform_device, vdev);  in vfio_platform_close_device()
224 	ret = vfio_platform_call_reset(vdev, &extra_dbg);  in vfio_platform_close_device()
225 	if (WARN_ON(ret && vdev->reset_required)) {  in vfio_platform_close_device()
227 			vdev->device,  in vfio_platform_close_device()
231 	pm_runtime_put(vdev->device);  in vfio_platform_close_device()
232 	vfio_platform_regions_cleanup(vdev);  in vfio_platform_close_device()
233 	vfio_platform_irq_cleanup(vdev);  in vfio_platform_close_device()
239 	struct vfio_platform_device *vdev =  in vfio_platform_open_device()  local
240 		container_of(core_vdev, struct vfio_platform_device, vdev);  in vfio_platform_open_device()
244 	ret = vfio_platform_regions_init(vdev);  in vfio_platform_open_device()
248 	ret = vfio_platform_irq_init(vdev);  in vfio_platform_open_device()
252 	ret = pm_runtime_get_sync(vdev->device);  in vfio_platform_open_device()
256 	ret = vfio_platform_call_reset(vdev, &extra_dbg);  in vfio_platform_open_device()
257 	if (ret && vdev->reset_required) {  in vfio_platform_open_device()
259 			vdev->device,  in vfio_platform_open_device()
267 	pm_runtime_put(vdev->device);  in vfio_platform_open_device()
268 	vfio_platform_irq_cleanup(vdev);  in vfio_platform_open_device()
270 	vfio_platform_regions_cleanup(vdev);  in vfio_platform_open_device()
278 	struct vfio_platform_device *vdev =  in vfio_platform_ioctl()  local
279 		container_of(core_vdev, struct vfio_platform_device, vdev);  in vfio_platform_ioctl()
294 		if (vfio_platform_has_reset(vdev))  in vfio_platform_ioctl()
295 			vdev->flags |= VFIO_DEVICE_FLAGS_RESET;  in vfio_platform_ioctl()
296 		info.flags = vdev->flags;  in vfio_platform_ioctl()
297 		info.num_regions = vdev->num_regions;  in vfio_platform_ioctl()
298 		info.num_irqs = vdev->num_irqs;  in vfio_platform_ioctl()
314 		if (info.index >= vdev->num_regions)  in vfio_platform_ioctl()
319 		info.size = vdev->regions[info.index].size;  in vfio_platform_ioctl()
320 		info.flags = vdev->regions[info.index].flags;  in vfio_platform_ioctl()
336 		if (info.index >= vdev->num_irqs)  in vfio_platform_ioctl()
339 		info.flags = vdev->irqs[info.index].flags;  in vfio_platform_ioctl()
340 		info.count = vdev->irqs[info.index].count;  in vfio_platform_ioctl()
356 		ret = vfio_set_irqs_validate_and_prepare(&hdr, vdev->num_irqs,  in vfio_platform_ioctl()
357 						 vdev->num_irqs, &data_size);  in vfio_platform_ioctl()
368 		mutex_lock(&vdev->igate);  in vfio_platform_ioctl()
370 		ret = vfio_platform_set_irqs_ioctl(vdev, hdr.flags, hdr.index,  in vfio_platform_ioctl()
372 		mutex_unlock(&vdev->igate);  in vfio_platform_ioctl()
378 		return vfio_platform_call_reset(vdev, NULL);  in vfio_platform_ioctl()
443 	struct vfio_platform_device *vdev =  in vfio_platform_read()  local
444 		container_of(core_vdev, struct vfio_platform_device, vdev);  in vfio_platform_read()
448 	if (index >= vdev->num_regions)  in vfio_platform_read()
451 	if (!(vdev->regions[index].flags & VFIO_REGION_INFO_FLAG_READ))  in vfio_platform_read()
454 	if (vdev->regions[index].type & VFIO_PLATFORM_REGION_TYPE_MMIO)  in vfio_platform_read()
455 		return vfio_platform_read_mmio(&vdev->regions[index],  in vfio_platform_read()
457 	else if (vdev->regions[index].type & VFIO_PLATFORM_REGION_TYPE_PIO)  in vfio_platform_read()
521 	struct vfio_platform_device *vdev =  in vfio_platform_write()  local
522 		container_of(core_vdev, struct vfio_platform_device, vdev);  in vfio_platform_write()
526 	if (index >= vdev->num_regions)  in vfio_platform_write()
529 	if (!(vdev->regions[index].flags & VFIO_REGION_INFO_FLAG_WRITE))  in vfio_platform_write()
532 	if (vdev->regions[index].type & VFIO_PLATFORM_REGION_TYPE_MMIO)  in vfio_platform_write()
533 		return vfio_platform_write_mmio(&vdev->regions[index],  in vfio_platform_write()
535 	else if (vdev->regions[index].type & VFIO_PLATFORM_REGION_TYPE_PIO)  in vfio_platform_write()
564 	struct vfio_platform_device *vdev =  in vfio_platform_mmap()  local
565 		container_of(core_vdev, struct vfio_platform_device, vdev);  in vfio_platform_mmap()
574 	if (index >= vdev->num_regions)  in vfio_platform_mmap()
581 	if (!(vdev->regions[index].flags & VFIO_REGION_INFO_FLAG_MMAP))  in vfio_platform_mmap()
584 	if (!(vdev->regions[index].flags & VFIO_REGION_INFO_FLAG_READ)  in vfio_platform_mmap()
588 	if (!(vdev->regions[index].flags & VFIO_REGION_INFO_FLAG_WRITE)  in vfio_platform_mmap()
592 	vma->vm_private_data = vdev;  in vfio_platform_mmap()
594 	if (vdev->regions[index].type & VFIO_PLATFORM_REGION_TYPE_MMIO)  in vfio_platform_mmap()
595 		return vfio_platform_mmap_mmio(vdev->regions[index], vma);  in vfio_platform_mmap()
597 	else if (vdev->regions[index].type & VFIO_PLATFORM_REGION_TYPE_PIO)  in vfio_platform_mmap()
604 static int vfio_platform_of_probe(struct vfio_platform_device *vdev,  in vfio_platform_of_probe()  argument
610 					  &vdev->compat);  in vfio_platform_of_probe()
612 		dev_err(dev, "Cannot retrieve compat for %s\n", vdev->name);  in vfio_platform_of_probe()
634 int vfio_platform_init_common(struct vfio_platform_device *vdev)  in vfio_platform_init_common()  argument
637 	struct device *dev = vdev->vdev.dev;  in vfio_platform_init_common()
639 	ret = vfio_platform_acpi_probe(vdev, dev);  in vfio_platform_init_common()
641 		ret = vfio_platform_of_probe(vdev, dev);  in vfio_platform_init_common()
646 	vdev->device = dev;  in vfio_platform_init_common()
647 	mutex_init(&vdev->igate);  in vfio_platform_init_common()
649 	ret = vfio_platform_get_reset(vdev);  in vfio_platform_init_common()
650 	if (ret && vdev->reset_required) {  in vfio_platform_init_common()
652 			vdev->name);  in vfio_platform_init_common()
660 void vfio_platform_release_common(struct vfio_platform_device *vdev)  in vfio_platform_release_common()  argument
662 	vfio_platform_put_reset(vdev);  in vfio_platform_release_common()