52 static void vfio_platform_get_reset(struct vfio_platform_device *vdev)  in vfio_platform_get_reset()  argument
54 	vdev->reset = vfio_platform_lookup_reset(vdev->compat,  in vfio_platform_get_reset()
55 						&vdev->reset_module);  in vfio_platform_get_reset()
56 	if (!vdev->reset) {  in vfio_platform_get_reset()
57 		request_module("vfio-reset:%s", vdev->compat);  in vfio_platform_get_reset()
58 		vdev->reset = vfio_platform_lookup_reset(vdev->compat,  in vfio_platform_get_reset()
59 							 &vdev->reset_module);  in vfio_platform_get_reset()
63 static void vfio_platform_put_reset(struct vfio_platform_device *vdev)  in vfio_platform_put_reset()  argument
65 	if (vdev->reset)  in vfio_platform_put_reset()
66 		module_put(vdev->reset_module);  in vfio_platform_put_reset()
69 static int vfio_platform_regions_init(struct vfio_platform_device *vdev)  in vfio_platform_regions_init()  argument
73 	while (vdev->get_resource(vdev, cnt))  in vfio_platform_regions_init()
76 	vdev->regions = kcalloc(cnt, sizeof(struct vfio_platform_region),  in vfio_platform_regions_init()
78 	if (!vdev->regions)  in vfio_platform_regions_init()
83 			vdev->get_resource(vdev, i);  in vfio_platform_regions_init()
88 		vdev->regions[i].addr = res->start;  in vfio_platform_regions_init()
89 		vdev->regions[i].size = resource_size(res);  in vfio_platform_regions_init()
90 		vdev->regions[i].flags = 0;  in vfio_platform_regions_init()
94 			vdev->regions[i].type = VFIO_PLATFORM_REGION_TYPE_MMIO;  in vfio_platform_regions_init()
95 			vdev->regions[i].flags |= VFIO_REGION_INFO_FLAG_READ;  in vfio_platform_regions_init()
97 				vdev->regions[i].flags |=  in vfio_platform_regions_init()
104 			if (!(vdev->regions[i].addr & ~PAGE_MASK) &&  in vfio_platform_regions_init()
105 					!(vdev->regions[i].size & ~PAGE_MASK))  in vfio_platform_regions_init()
106 				vdev->regions[i].flags |=  in vfio_platform_regions_init()
111 			vdev->regions[i].type = VFIO_PLATFORM_REGION_TYPE_PIO;  in vfio_platform_regions_init()
118 	vdev->num_regions = cnt;  in vfio_platform_regions_init()
122 	kfree(vdev->regions);  in vfio_platform_regions_init()
126 static void vfio_platform_regions_cleanup(struct vfio_platform_device *vdev)  in vfio_platform_regions_cleanup()  argument
130 	for (i = 0; i < vdev->num_regions; i++)  in vfio_platform_regions_cleanup()
131 		iounmap(vdev->regions[i].ioaddr);  in vfio_platform_regions_cleanup()
133 	vdev->num_regions = 0;  in vfio_platform_regions_cleanup()
134 	kfree(vdev->regions);  in vfio_platform_regions_cleanup()
139 	struct vfio_platform_device *vdev = device_data;  in vfio_platform_release()  local
143 	if (!(--vdev->refcnt)) {  in vfio_platform_release()
144 		if (vdev->reset) {  in vfio_platform_release()
145 			dev_info(vdev->device, "reset\n");  in vfio_platform_release()
146 			vdev->reset(vdev);  in vfio_platform_release()
148 			dev_warn(vdev->device, "no reset function found!\n");  in vfio_platform_release()
150 		vfio_platform_regions_cleanup(vdev);  in vfio_platform_release()
151 		vfio_platform_irq_cleanup(vdev);  in vfio_platform_release()
156 	module_put(vdev->parent_module);  in vfio_platform_release()
161 	struct vfio_platform_device *vdev = device_data;  in vfio_platform_open()  local
164 	if (!try_module_get(vdev->parent_module))  in vfio_platform_open()
169 	if (!vdev->refcnt) {  in vfio_platform_open()
170 		ret = vfio_platform_regions_init(vdev);  in vfio_platform_open()
174 		ret = vfio_platform_irq_init(vdev);  in vfio_platform_open()
178 		if (vdev->reset) {  in vfio_platform_open()
179 			dev_info(vdev->device, "reset\n");  in vfio_platform_open()
180 			vdev->reset(vdev);  in vfio_platform_open()
182 			dev_warn(vdev->device, "no reset function found!\n");  in vfio_platform_open()
186 	vdev->refcnt++;  in vfio_platform_open()
192 	vfio_platform_regions_cleanup(vdev);  in vfio_platform_open()
202 	struct vfio_platform_device *vdev = device_data;  in vfio_platform_ioctl()  local
216 		if (vdev->reset)  in vfio_platform_ioctl()
217 			vdev->flags |= VFIO_DEVICE_FLAGS_RESET;  in vfio_platform_ioctl()
218 		info.flags = vdev->flags;  in vfio_platform_ioctl()
219 		info.num_regions = vdev->num_regions;  in vfio_platform_ioctl()
220 		info.num_irqs = vdev->num_irqs;  in vfio_platform_ioctl()
236 		if (info.index >= vdev->num_regions)  in vfio_platform_ioctl()
241 		info.size = vdev->regions[info.index].size;  in vfio_platform_ioctl()
242 		info.flags = vdev->regions[info.index].flags;  in vfio_platform_ioctl()
258 		if (info.index >= vdev->num_irqs)  in vfio_platform_ioctl()
261 		info.flags = vdev->irqs[info.index].flags;  in vfio_platform_ioctl()
262 		info.count = vdev->irqs[info.index].count;  in vfio_platform_ioctl()
280 		if (hdr.index >= vdev->num_irqs)  in vfio_platform_ioctl()
305 		mutex_lock(&vdev->igate);  in vfio_platform_ioctl()
307 		ret = vfio_platform_set_irqs_ioctl(vdev, hdr.flags, hdr.index,  in vfio_platform_ioctl()
309 		mutex_unlock(&vdev->igate);  in vfio_platform_ioctl()
315 		if (vdev->reset)  in vfio_platform_ioctl()
316 			return vdev->reset(vdev);  in vfio_platform_ioctl()
382 	struct vfio_platform_device *vdev = device_data;  in vfio_platform_read()  local
386 	if (index >= vdev->num_regions)  in vfio_platform_read()
389 	if (!(vdev->regions[index].flags & VFIO_REGION_INFO_FLAG_READ))  in vfio_platform_read()
392 	if (vdev->regions[index].type & VFIO_PLATFORM_REGION_TYPE_MMIO)  in vfio_platform_read()
393 		return vfio_platform_read_mmio(&vdev->regions[index],  in vfio_platform_read()
395 	else if (vdev->regions[index].type & VFIO_PLATFORM_REGION_TYPE_PIO)  in vfio_platform_read()
458 	struct vfio_platform_device *vdev = device_data;  in vfio_platform_write()  local
462 	if (index >= vdev->num_regions)  in vfio_platform_write()
465 	if (!(vdev->regions[index].flags & VFIO_REGION_INFO_FLAG_WRITE))  in vfio_platform_write()
468 	if (vdev->regions[index].type & VFIO_PLATFORM_REGION_TYPE_MMIO)  in vfio_platform_write()
469 		return vfio_platform_write_mmio(&vdev->regions[index],  in vfio_platform_write()
471 	else if (vdev->regions[index].type & VFIO_PLATFORM_REGION_TYPE_PIO)  in vfio_platform_write()
499 	struct vfio_platform_device *vdev = device_data;  in vfio_platform_mmap()  local
508 	if (index >= vdev->num_regions)  in vfio_platform_mmap()
515 	if (!(vdev->regions[index].flags & VFIO_REGION_INFO_FLAG_MMAP))  in vfio_platform_mmap()
518 	if (!(vdev->regions[index].flags & VFIO_REGION_INFO_FLAG_READ)  in vfio_platform_mmap()
522 	if (!(vdev->regions[index].flags & VFIO_REGION_INFO_FLAG_WRITE)  in vfio_platform_mmap()
526 	vma->vm_private_data = vdev;  in vfio_platform_mmap()
528 	if (vdev->regions[index].type & VFIO_PLATFORM_REGION_TYPE_MMIO)  in vfio_platform_mmap()
529 		return vfio_platform_mmap_mmio(vdev->regions[index], vma);  in vfio_platform_mmap()
531 	else if (vdev->regions[index].type & VFIO_PLATFORM_REGION_TYPE_PIO)  in vfio_platform_mmap()
547 int vfio_platform_probe_common(struct vfio_platform_device *vdev,  in vfio_platform_probe_common()  argument
553 	if (!vdev)  in vfio_platform_probe_common()
556 	ret = device_property_read_string(dev, "compatible", &vdev->compat);  in vfio_platform_probe_common()
558 		pr_err("VFIO: cannot retrieve compat for %s\n", vdev->name);  in vfio_platform_probe_common()
562 	vdev->device = dev;  in vfio_platform_probe_common()
566 		pr_err("VFIO: No IOMMU group for device %s\n", vdev->name);  in vfio_platform_probe_common()
570 	ret = vfio_add_group_dev(dev, &vfio_platform_ops, vdev);  in vfio_platform_probe_common()
576 	vfio_platform_get_reset(vdev);  in vfio_platform_probe_common()
578 	mutex_init(&vdev->igate);  in vfio_platform_probe_common()
586 	struct vfio_platform_device *vdev;  in vfio_platform_remove_common()  local
588 	vdev = vfio_del_group_dev(dev);  in vfio_platform_remove_common()
590 	if (vdev) {  in vfio_platform_remove_common()
591 		vfio_platform_put_reset(vdev);  in vfio_platform_remove_common()
595 	return vdev;  in vfio_platform_remove_common()