From: Thomas Zimmermann <tzimmermann@suse.de>
To: Gerd Hoffmann <kraxel@redhat.com>, dri-devel@lists.freedesktop.org
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>,
Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Maxime Ripard <maxime.ripard@bootlin.com>,
Sean Paul <sean@poorly.run>, David Airlie <airlied@linux.ie>,
Daniel Vetter <daniel@ffwll.ch>,
open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 5/8] drm/ttm: add drm_gem_ttm_mmap()
Date: Fri, 13 Sep 2019 15:02:25 +0200 [thread overview]
Message-ID: <5a79a05f-5763-201a-86e8-bb298d4fe856@suse.de> (raw)
In-Reply-To: <20190913122908.784-6-kraxel@redhat.com>
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Hi
Am 13.09.19 um 14:29 schrieb Gerd Hoffmann:
> Add helper function to mmap ttm bo's using &drm_gem_object_funcs.mmap().
>
> Note that with this code path access verification is done by
> drm_gem_mmap() (which calls drm_vma_node_is_allowed(()).
> The &ttm_bo_driver.verify_access() callback is is not used.
>
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
> ---
> include/drm/drm_gem_ttm_helper.h | 2 ++
> drivers/gpu/drm/drm_gem_ttm_helper.c | 19 +++++++++++++++++++
> 2 files changed, 21 insertions(+)
>
> diff --git a/include/drm/drm_gem_ttm_helper.h b/include/drm/drm_gem_ttm_helper.h
> index 6268f89c5a48..118cef76f84f 100644
> --- a/include/drm/drm_gem_ttm_helper.h
> +++ b/include/drm/drm_gem_ttm_helper.h
> @@ -15,5 +15,7 @@
>
> void drm_gem_ttm_print_info(struct drm_printer *p, unsigned int indent,
> const struct drm_gem_object *gem);
> +int drm_gem_ttm_mmap(struct drm_gem_object *gem,
> + struct vm_area_struct *vma);
>
> #endif
> diff --git a/drivers/gpu/drm/drm_gem_ttm_helper.c b/drivers/gpu/drm/drm_gem_ttm_helper.c
> index 9a4bafcf20df..34ce6cf78b35 100644
> --- a/drivers/gpu/drm/drm_gem_ttm_helper.c
> +++ b/drivers/gpu/drm/drm_gem_ttm_helper.c
> @@ -52,5 +52,24 @@ void drm_gem_ttm_print_info(struct drm_printer *p, unsigned int indent,
> }
> EXPORT_SYMBOL(drm_gem_ttm_print_info);
>
> +/**
> + * drm_gem_ttm_mmap() - mmap &ttm_buffer_object
> + * @gem: GEM object.
> + * @vma: vm area.
> + *
> + * This function can be used as &drm_gem_object_funcs.mmap
> + * callback.
> + */
> +int drm_gem_ttm_mmap(struct drm_gem_object *gem,
> + struct vm_area_struct *vma)
> +{
> + struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem);
> +
> + ttm_bo_get(bo);
> + ttm_bo_mmap_vma_setup(bo, vma);
> + return 0;
> +}
This function looks like ttm_fbdev_mmap(). Can you use that instead?
Best regards
Thomas
> +EXPORT_SYMBOL(drm_gem_ttm_mmap);
> +
> MODULE_DESCRIPTION("DRM gem ttm helpers");
> MODULE_LICENSE("GPL");
>
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Linux GmbH, Maxfeldstrasse 5, 90409 Nuernberg, Germany
GF: Felix Imendörffer, Mary Higgins, Sri Rasiah
HRB 21284 (AG Nürnberg)
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next prev parent reply other threads:[~2019-09-13 13:02 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20190913122908.784-1-kraxel@redhat.com>
2019-09-13 12:29 ` [PATCH 1/8] drm: add mmap() to drm_gem_object_funcs Gerd Hoffmann
2019-09-17 13:27 ` Daniel Vetter
2019-09-13 12:29 ` [PATCH 2/8] drm/shmem: switch shmem helper to &drm_gem_object_funcs.mmap Gerd Hoffmann
2019-09-13 14:03 ` Steven Price
2019-09-17 8:14 ` Gerd Hoffmann
2019-09-13 12:29 ` [PATCH 3/8] drm/shmem: drop DEFINE_DRM_GEM_SHMEM_FOPS Gerd Hoffmann
2019-09-16 22:07 ` Rob Herring
2019-09-17 8:18 ` Gerd Hoffmann
2019-09-13 12:29 ` [PATCH 4/8] drm/ttm: factor out ttm_bo_mmap_vma_setup Gerd Hoffmann
2019-09-13 12:56 ` Thomas Zimmermann
2019-09-17 8:26 ` Gerd Hoffmann
2019-09-13 13:05 ` Thomas Zimmermann
2019-09-17 8:34 ` Gerd Hoffmann
2019-09-17 9:38 ` Thomas Zimmermann
2019-09-17 9:54 ` Gerd Hoffmann
2019-09-13 12:29 ` [PATCH 5/8] drm/ttm: add drm_gem_ttm_mmap() Gerd Hoffmann
2019-09-13 13:02 ` Thomas Zimmermann [this message]
2019-09-13 12:29 ` [PATCH 6/8] drm/vram: switch vram helper to &drm_gem_object_funcs.mmap() Gerd Hoffmann
2019-09-13 13:10 ` Thomas Zimmermann
2019-09-13 12:29 ` [PATCH 7/8] drm/vram: drop verify_access Gerd Hoffmann
2019-09-13 13:11 ` Thomas Zimmermann
2019-09-13 12:29 ` [PATCH 8/8] drm/vram: drop DRM_VRAM_MM_FILE_OPERATIONS Gerd Hoffmann
2019-09-13 13:18 ` Thomas Zimmermann
2019-09-17 8:39 ` Gerd Hoffmann
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