diff options
Diffstat (limited to 'drivers/gpu/drm/exynos/exynos_drm_gem.c')
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_gem.c | 76 |
1 files changed, 14 insertions, 62 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c index 1ade191d84f4..42d2904d88c7 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_gem.c +++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c @@ -338,46 +338,22 @@ int exynos_drm_gem_map_offset_ioctl(struct drm_device *dev, void *data, &args->offset); } -static struct drm_file *exynos_drm_find_drm_file(struct drm_device *drm_dev, - struct file *filp) -{ - struct drm_file *file_priv; - - /* find current process's drm_file from filelist. */ - list_for_each_entry(file_priv, &drm_dev->filelist, lhead) - if (file_priv->filp == filp) - return file_priv; - - WARN_ON(1); - - return ERR_PTR(-EFAULT); -} - -static int exynos_drm_gem_mmap_buffer(struct file *filp, +int exynos_drm_gem_mmap_buffer(struct file *filp, struct vm_area_struct *vma) { struct drm_gem_object *obj = filp->private_data; struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj); struct drm_device *drm_dev = obj->dev; struct exynos_drm_gem_buf *buffer; - struct drm_file *file_priv; unsigned long vm_size; int ret; + WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); + vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP; vma->vm_private_data = obj; vma->vm_ops = drm_dev->driver->gem_vm_ops; - /* restore it to driver's fops. */ - filp->f_op = fops_get(drm_dev->driver->fops); - - file_priv = exynos_drm_find_drm_file(drm_dev, filp); - if (IS_ERR(file_priv)) - return PTR_ERR(file_priv); - - /* restore it to drm_file. */ - filp->private_data = file_priv; - update_vm_cache_attr(exynos_gem_obj, vma); vm_size = vma->vm_end - vma->vm_start; @@ -411,15 +387,13 @@ static int exynos_drm_gem_mmap_buffer(struct file *filp, return 0; } -static const struct file_operations exynos_drm_gem_fops = { - .mmap = exynos_drm_gem_mmap_buffer, -}; - int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { + struct drm_exynos_file_private *exynos_file_priv; struct drm_exynos_gem_mmap *args = data; struct drm_gem_object *obj; + struct file *anon_filp; unsigned long addr; if (!(dev->driver->driver_features & DRIVER_GEM)) { @@ -427,47 +401,25 @@ int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void *data, return -ENODEV; } + mutex_lock(&dev->struct_mutex); + obj = drm_gem_object_lookup(dev, file_priv, args->handle); if (!obj) { DRM_ERROR("failed to lookup gem object.\n"); + mutex_unlock(&dev->struct_mutex); return -EINVAL; } - /* - * We have to use gem object and its fops for specific mmaper, - * but vm_mmap() can deliver only filp. So we have to change - * filp->f_op and filp->private_data temporarily, then restore - * again. So it is important to keep lock until restoration the - * settings to prevent others from misuse of filp->f_op or - * filp->private_data. - */ - mutex_lock(&dev->struct_mutex); - - /* - * Set specific mmper's fops. And it will be restored by - * exynos_drm_gem_mmap_buffer to dev->driver->fops. - * This is used to call specific mapper temporarily. - */ - file_priv->filp->f_op = &exynos_drm_gem_fops; - - /* - * Set gem object to private_data so that specific mmaper - * can get the gem object. And it will be restored by - * exynos_drm_gem_mmap_buffer to drm_file. - */ - file_priv->filp->private_data = obj; + exynos_file_priv = file_priv->driver_priv; + anon_filp = exynos_file_priv->anon_filp; + anon_filp->private_data = obj; - addr = vm_mmap(file_priv->filp, 0, args->size, - PROT_READ | PROT_WRITE, MAP_SHARED, 0); + addr = vm_mmap(anon_filp, 0, args->size, PROT_READ | PROT_WRITE, + MAP_SHARED, 0); drm_gem_object_unreference(obj); if (IS_ERR_VALUE(addr)) { - /* check filp->f_op, filp->private_data are restored */ - if (file_priv->filp->f_op == &exynos_drm_gem_fops) { - file_priv->filp->f_op = fops_get(dev->driver->fops); - file_priv->filp->private_data = file_priv; - } mutex_unlock(&dev->struct_mutex); return (int)addr; } @@ -652,7 +604,7 @@ int exynos_drm_gem_dumb_create(struct drm_file *file_priv, int ret; /* - * alocate memory to be used for framebuffer. + * allocate memory to be used for framebuffer. * - this callback would be called by user application * with DRM_IOCTL_MODE_CREATE_DUMB command. */ |