Re: [PATCH v2 16/21] drm/vgem: Introduce GEM object functions

Melissa Wen
2020-09-17T19:42:49Z

Hi Thomas,

On 09/15, Thomas Zimmermann wrote:
> GEM object functions deprecate several similar callback interfaces in
> struct drm_driver. This patch replaces the per-driver callbacks with
> per-instance callbacks in vgem. The only exception is gem_prime_mmap,
> which is non-trivial to convert.
>
> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>

Thanks here again.

This drv file is little tumultuous to me.
I mean, I took a while to sort functions in my head.

However, finally, I got it, and the change looks good.

Reviewed-by: Melissa Wen <melissa.srw@gmail.com>

> ---
> drivers/gpu/drm/vgem/vgem_drv.c | 21 ++++++++++++++-------
> 1 file changed, 14 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/vgem/vgem_drv.c b/drivers/gpu/drm/vgem/vgem_drv.c
> index cb884c890065..fa54a6d1403d 100644
> --- a/drivers/gpu/drm/vgem/vgem_drv.c
> +++ b/drivers/gpu/drm/vgem/vgem_drv.c
> @@ -50,6 +50,8 @@
> #define DRIVER_MAJOR 1
> #define DRIVER_MINOR 0
>
> +static const struct drm_gem_object_funcs vgem_gem_object_funcs;
> +
> static struct vgem_device {
> struct drm_device drm;
> struct platform_device *platform;
> @@ -167,6 +169,8 @@ static struct drm_vgem_gem_object *__vgem_gem_create(struct drm_device *dev,
> if (!obj)
> return ERR_PTR(-ENOMEM);
>
> + obj->base.funcs = &vgem_gem_object_funcs;
> +
> ret = drm_gem_object_init(dev, &obj->base, roundup(size, PAGE_SIZE));
> if (ret) {
> kfree(obj);
> @@ -401,12 +405,20 @@ static int vgem_prime_mmap(struct drm_gem_object *obj,
> return 0;
> }
>
> +static const struct drm_gem_object_funcs vgem_gem_object_funcs = {
> + .free = vgem_gem_free_object,
> + .pin = vgem_prime_pin,
> + .unpin = vgem_prime_unpin,
> + .get_sg_table = vgem_prime_get_sg_table,
> + .vmap = vgem_prime_vmap,
> + .vunmap = vgem_prime_vunmap,
> + .vm_ops = &vgem_gem_vm_ops,
> +};
> +
> static struct drm_driver vgem_driver = {
> .driver_features = DRIVER_GEM | DRIVER_RENDER,
> .open = vgem_open,
> .postclose = vgem_postclose,
> - .gem_free_object_unlocked = vgem_gem_free_object,
> - .gem_vm_ops = &vgem_gem_vm_ops,
> .ioctls = vgem_ioctls,
> .num_ioctls = ARRAY_SIZE(vgem_ioctls),
> .fops = &vgem_driver_fops,
> @@ -415,13 +427,8 @@ static struct drm_driver vgem_driver = {
>
> .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
> .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
> - .gem_prime_pin = vgem_prime_pin,
> - .gem_prime_unpin = vgem_prime_unpin,
> .gem_prime_import = vgem_prime_import,
> .gem_prime_import_sg_table = vgem_prime_import_sg_table,
> - .gem_prime_get_sg_table = vgem_prime_get_sg_table,
> - .gem_prime_vmap = vgem_prime_vmap,
> - .gem_prime_vunmap = vgem_prime_vunmap,
> .gem_prime_mmap = vgem_prime_mmap,
>
> .name = DRIVER_NAME,
> --
> 2.28.0
>
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