wait_queue_head_t wait;
int vma_count;
struct uio_info *info;
- struct kset map_attr_kset;
+ struct kobject *map_dir;
};
static int uio_major;
static DEFINE_IDR(uio_idr);
-static struct file_operations uio_fops;
+static const struct file_operations uio_fops;
/* UIO class infrastructure */
static struct uio_class {
* attributes
*/
-static struct attribute attr_addr = {
- .name = "addr",
- .mode = S_IRUGO,
+struct uio_map {
+ struct kobject kobj;
+ struct uio_mem *mem;
};
+#define to_map(map) container_of(map, struct uio_map, kobj)
-static struct attribute attr_size = {
- .name = "size",
- .mode = S_IRUGO,
+static ssize_t map_addr_show(struct uio_mem *mem, char *buf)
+{
+ return sprintf(buf, "0x%lx\n", mem->addr);
+}
+
+static ssize_t map_size_show(struct uio_mem *mem, char *buf)
+{
+ return sprintf(buf, "0x%lx\n", mem->size);
+}
+
+struct uio_sysfs_entry {
+ struct attribute attr;
+ ssize_t (*show)(struct uio_mem *, char *);
+ ssize_t (*store)(struct uio_mem *, const char *, size_t);
};
-static struct attribute* map_attrs[] = {
- &attr_addr, &attr_size, NULL
+static struct uio_sysfs_entry addr_attribute =
+ __ATTR(addr, S_IRUGO, map_addr_show, NULL);
+static struct uio_sysfs_entry size_attribute =
+ __ATTR(size, S_IRUGO, map_size_show, NULL);
+
+static struct attribute *attrs[] = {
+ &addr_attribute.attr,
+ &size_attribute.attr,
+ NULL, /* need to NULL terminate the list of attributes */
};
-static ssize_t map_attr_show(struct kobject *kobj, struct attribute *attr,
- char *buf)
+static void map_release(struct kobject *kobj)
{
- struct uio_mem *mem = container_of(kobj, struct uio_mem, kobj);
+ struct uio_map *map = to_map(kobj);
+ kfree(map);
+}
- if (strncmp(attr->name,"addr",4) == 0)
- return sprintf(buf, "0x%lx\n", mem->addr);
+static ssize_t map_type_show(struct kobject *kobj, struct attribute *attr,
+ char *buf)
+{
+ struct uio_map *map = to_map(kobj);
+ struct uio_mem *mem = map->mem;
+ struct uio_sysfs_entry *entry;
- if (strncmp(attr->name,"size",4) == 0)
- return sprintf(buf, "0x%lx\n", mem->size);
+ entry = container_of(attr, struct uio_sysfs_entry, attr);
- return -ENODEV;
-}
+ if (!entry->show)
+ return -EIO;
-static void map_attr_release(struct kobject *kobj)
-{
- /* TODO ??? */
+ return entry->show(mem, buf);
}
-static struct sysfs_ops map_attr_ops = {
- .show = map_attr_show,
+static struct sysfs_ops uio_sysfs_ops = {
+ .show = map_type_show,
};
static struct kobj_type map_attr_type = {
- .release = map_attr_release,
- .sysfs_ops = &map_attr_ops,
- .default_attrs = map_attrs,
+ .release = map_release,
+ .sysfs_ops = &uio_sysfs_ops,
+ .default_attrs = attrs,
};
static ssize_t show_name(struct device *dev,
int mi;
int map_found = 0;
struct uio_mem *mem;
+ struct uio_map *map;
ret = sysfs_create_group(&idev->dev->kobj, &uio_attr_grp);
if (ret)
break;
if (!map_found) {
map_found = 1;
- kobject_set_name(&idev->map_attr_kset.kobj,"maps");
- idev->map_attr_kset.ktype = &map_attr_type;
- idev->map_attr_kset.kobj.parent = &idev->dev->kobj;
- ret = kset_register(&idev->map_attr_kset);
- if (ret)
- goto err_remove_group;
+ idev->map_dir = kobject_create_and_add("maps",
+ &idev->dev->kobj);
+ if (!idev->map_dir)
+ goto err;
}
- kobject_init(&mem->kobj);
- kobject_set_name(&mem->kobj,"map%d",mi);
- mem->kobj.parent = &idev->map_attr_kset.kobj;
- mem->kobj.kset = &idev->map_attr_kset;
- ret = kobject_add(&mem->kobj);
+ map = kzalloc(sizeof(*map), GFP_KERNEL);
+ if (!map)
+ goto err;
+ kobject_init(&map->kobj, &map_attr_type);
+ map->mem = mem;
+ mem->map = map;
+ ret = kobject_add(&map->kobj, idev->map_dir, "map%d", mi);
+ if (ret)
+ goto err;
+ ret = kobject_uevent(&map->kobj, KOBJ_ADD);
if (ret)
- goto err_remove_maps;
+ goto err;
}
return 0;
-err_remove_maps:
+err:
for (mi--; mi>=0; mi--) {
mem = &idev->info->mem[mi];
- kobject_unregister(&mem->kobj);
+ map = mem->map;
+ kobject_put(&map->kobj);
}
- kset_unregister(&idev->map_attr_kset); /* Needed ? */
-err_remove_group:
+ kobject_put(idev->map_dir);
sysfs_remove_group(&idev->dev->kobj, &uio_attr_grp);
err_group:
dev_err(idev->dev, "error creating sysfs files (%d)\n", ret);
mem = &idev->info->mem[mi];
if (mem->size == 0)
break;
- kobject_unregister(&mem->kobj);
+ kobject_put(&mem->map->kobj);
}
- kset_unregister(&idev->map_attr_kset);
+ kobject_put(idev->map_dir);
sysfs_remove_group(&idev->dev->kobj, &uio_attr_grp);
}
idev->vma_count--;
}
-static struct page *uio_vma_nopage(struct vm_area_struct *vma,
- unsigned long address, int *type)
+static int uio_vma_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
{
struct uio_device *idev = vma->vm_private_data;
- struct page* page = NOPAGE_SIGBUS;
+ struct page *page;
int mi = uio_find_mem_index(vma);
if (mi < 0)
- return page;
+ return VM_FAULT_SIGBUS;
if (idev->info->mem[mi].memtype == UIO_MEM_LOGICAL)
page = virt_to_page(idev->info->mem[mi].addr);
else
page = vmalloc_to_page((void*)idev->info->mem[mi].addr);
get_page(page);
- if (type)
- *type = VM_FAULT_MINOR;
- return page;
+ vmf->page = page;
+ return 0;
}
static struct vm_operations_struct uio_vm_ops = {
.open = uio_vma_open,
.close = uio_vma_close,
- .nopage = uio_vma_nopage,
+ .fault = uio_vma_fault,
};
static int uio_mmap_physical(struct vm_area_struct *vma)
vma->vm_flags |= VM_IO | VM_RESERVED;
+ vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+
return remap_pfn_range(vma,
vma->vm_start,
idev->info->mem[mi].addr >> PAGE_SHIFT,
}
}
-static struct file_operations uio_fops = {
+static const struct file_operations uio_fops = {
.owner = THIS_MODULE,
.open = uio_open,
.release = uio_release,