[18/20] drm/xen: Introduce GEM object functions

GEM object functions deprecate several similar callback interfaces in
struct drm_driver. This patch replaces the per-driver callbacks with
per-instance callbacks in xen. The only exception is gem_prime_mmap,
which is non-trivial to convert.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/xen/xen_drm_front.c     | 12 +-----------
 drivers/gpu/drm/xen/xen_drm_front.h     |  2 ++
 drivers/gpu/drm/xen/xen_drm_front_gem.c | 15 +++++++++++++++
 3 files changed, 18 insertions(+), 11 deletions(-)

Hi

Am 13.08.20 um 13:19 schrieb Oleksandr Andrushchenko:
> Hi,
> 
> On 8/13/20 11:36 AM, 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 xen. The only exception is gem_prime_mmap,
>> which is non-trivial to convert.
>>
>> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
>> ---
>>   drivers/gpu/drm/xen/xen_drm_front.c     | 12 +-----------
>>   drivers/gpu/drm/xen/xen_drm_front.h     |  2 ++
>>   drivers/gpu/drm/xen/xen_drm_front_gem.c | 15 +++++++++++++++
>>   3 files changed, 18 insertions(+), 11 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/xen/xen_drm_front.c b/drivers/gpu/drm/xen/xen_drm_front.c
>> index 3e660fb111b3..bd9af1875af1 100644
>> --- a/drivers/gpu/drm/xen/xen_drm_front.c
>> +++ b/drivers/gpu/drm/xen/xen_drm_front.c
>> @@ -433,7 +433,7 @@ static int xen_drm_drv_dumb_create(struct drm_file *filp,
>>   	return ret;
>>   }
>>   
>> -static void xen_drm_drv_free_object_unlocked(struct drm_gem_object *obj)
>> +void xen_drm_drv_free_object_unlocked(struct drm_gem_object *obj)
> 
> Can we please have naming consistent and name it as
> 
> xen_drm_front_drv_free_object_unlocked or any other name if this seems to be too long,
> 
> but starting with xen_drm_front_ as the rest of exported functions?

There already is a function with that name in drm_xen_front_gem.c. I'll
move the callback function next to the object-function structure and
rename it slightly.

Best regards
Thomas

> 
> With this,
> 
> Acked-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
> 
> Thank you,
> 
> Oleksandr
> 
>>   {
>>   	struct xen_drm_front_drm_info *drm_info = obj->dev->dev_private;
>>   	int idx;
>> @@ -481,22 +481,12 @@ static const struct file_operations xen_drm_dev_fops = {
>>   	.mmap           = xen_drm_front_gem_mmap,
>>   };
>>   
>> -static const struct vm_operations_struct xen_drm_drv_vm_ops = {
>> -	.open           = drm_gem_vm_open,
>> -	.close          = drm_gem_vm_close,
>> -};
>> -
>>   static struct drm_driver xen_drm_driver = {
>>   	.driver_features           = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
>>   	.release                   = xen_drm_drv_release,
>> -	.gem_vm_ops                = &xen_drm_drv_vm_ops,
>> -	.gem_free_object_unlocked  = xen_drm_drv_free_object_unlocked,
>>   	.prime_handle_to_fd        = drm_gem_prime_handle_to_fd,
>>   	.prime_fd_to_handle        = drm_gem_prime_fd_to_handle,
>>   	.gem_prime_import_sg_table = xen_drm_front_gem_import_sg_table,
>> -	.gem_prime_get_sg_table    = xen_drm_front_gem_get_sg_table,
>> -	.gem_prime_vmap            = xen_drm_front_gem_prime_vmap,
>> -	.gem_prime_vunmap          = xen_drm_front_gem_prime_vunmap,
>>   	.gem_prime_mmap            = xen_drm_front_gem_prime_mmap,
>>   	.dumb_create               = xen_drm_drv_dumb_create,
>>   	.fops                      = &xen_drm_dev_fops,
>> diff --git a/drivers/gpu/drm/xen/xen_drm_front.h b/drivers/gpu/drm/xen/xen_drm_front.h
>> index f92c258350ca..93e60c1db550 100644
>> --- a/drivers/gpu/drm/xen/xen_drm_front.h
>> +++ b/drivers/gpu/drm/xen/xen_drm_front.h
>> @@ -160,4 +160,6 @@ int xen_drm_front_page_flip(struct xen_drm_front_info *front_info,
>>   void xen_drm_front_on_frame_done(struct xen_drm_front_info *front_info,
>>   				 int conn_idx, u64 fb_cookie);
>>   
>> +void xen_drm_drv_free_object_unlocked(struct drm_gem_object *obj);
>> +
>>   #endif /* __XEN_DRM_FRONT_H_ */
>> diff --git a/drivers/gpu/drm/xen/xen_drm_front_gem.c b/drivers/gpu/drm/xen/xen_drm_front_gem.c
>> index f0b85e094111..7b315c08bcfc 100644
>> --- a/drivers/gpu/drm/xen/xen_drm_front_gem.c
>> +++ b/drivers/gpu/drm/xen/xen_drm_front_gem.c
>> @@ -56,6 +56,19 @@ static void gem_free_pages_array(struct xen_gem_object *xen_obj)
>>   	xen_obj->pages = NULL;
>>   }
>>   
>> +static const struct vm_operations_struct xen_drm_drv_vm_ops = {
>> +	.open           = drm_gem_vm_open,
>> +	.close          = drm_gem_vm_close,
>> +};
>> +
>> +static const struct drm_gem_object_funcs xen_drm_front_gem_object_funcs = {
>> +	.free = xen_drm_drv_free_object_unlocked,
>> +	.get_sg_table = xen_drm_front_gem_get_sg_table,
>> +	.vmap = xen_drm_front_gem_prime_vmap,
>> +	.vunmap = xen_drm_front_gem_prime_vunmap,
>> +	.vm_ops = &xen_drm_drv_vm_ops,
>> +};
>> +
>>   static struct xen_gem_object *gem_create_obj(struct drm_device *dev,
>>   					     size_t size)
>>   {
>> @@ -66,6 +79,8 @@ static struct xen_gem_object *gem_create_obj(struct drm_device *dev,
>>   	if (!xen_obj)
>>   		return ERR_PTR(-ENOMEM);
>>   
>> +	xen_obj->base.funcs = &xen_drm_front_gem_object_funcs;
>> +
>>   	ret = drm_gem_object_init(dev, &xen_obj->base, size);
>>   	if (ret < 0) {
>>   		kfree(xen_obj);