linux-kernel - Re: [PATCH v5 RESEND 3/3] drm/udl: use DRM_GEM_SHMEM_DRIVER_OPS_NO_MAP

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Message-ID: <ee9ca879-4bb7-4339-b827-78eb2d46a97f@suse.de>
Date: Mon, 26 May 2025 15:57:31 +0200
From: Thomas Zimmermann <tzimmermann@...e.de>
To: oushixiong1025@....com, Christian König
 <christian.koenig@....com>
Cc: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
 Maxime Ripard <mripard@...nel.org>, David Airlie <airlied@...il.com>,
 Simona Vetter <simona@...ll.ch>, Sean Paul <sean@...rly.run>,
 Jocelyn Falempe <jfalempe@...hat.com>, dri-devel@...ts.freedesktop.org,
 linux-kernel@...r.kernel.org, Shixiong Ou <oushixiong@...inos.cn>
Subject: Re: [PATCH v5 RESEND 3/3] drm/udl: use
 DRM_GEM_SHMEM_DRIVER_OPS_NO_MAP_SGT



Am 22.05.25 um 09:07 schrieb oushixiong1025@....com:
> From: Shixiong Ou <oushixiong@...inos.cn>
>
> Import dmabuf without mapping its sg_table to avoid issues likes:
>     udl 2-1.4:1.0: swiotlb buffer is full (sz: 2097152 bytes), total 65536 (slots), used 1 (slots)
>
> Signed-off-by: Shixiong Ou <oushixiong@...inos.cn>

Reviewed-by: Thomas Zimmermann <tzimmermann@...e.de>

> ---
>   drivers/gpu/drm/udl/udl_drv.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/udl/udl_drv.c b/drivers/gpu/drm/udl/udl_drv.c
> index 1922988625eb..ce5ae7cacb90 100644
> --- a/drivers/gpu/drm/udl/udl_drv.c
> +++ b/drivers/gpu/drm/udl/udl_drv.c
> @@ -57,7 +57,7 @@ static const struct drm_driver driver = {
>   
>   	/* GEM hooks */
>   	.fops = &udl_driver_fops,
> -	DRM_GEM_SHMEM_DRIVER_OPS,
> +	DRM_GEM_SHMEM_DRIVER_OPS_NO_MAP_SGT,
>   	DRM_FBDEV_SHMEM_DRIVER_OPS,
>   
>   	.name = DRIVER_NAME,

-- 
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstrasse 146, 90461 Nuernberg, Germany
GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman
HRB 36809 (AG Nuernberg)