From: Daniel Vetter <daniel@ffwll.ch>
To: Thomas Zimmermann <tzimmermann@suse.de>
Cc: luben.tuikov@amd.com, heiko@sntech.de, airlied@linux.ie,
nouveau@lists.freedesktop.org, linus.walleij@linaro.org,
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christian.koenig@amd.com, l.stach@pengutronix.de
Subject: Re: [PATCH v3 7/7] drm/todo: Update entries around struct dma_buf_map
Date: Fri, 2 Oct 2020 20:45:54 +0200 [thread overview]
Message-ID: <20201002184554.GN438822@phenom.ffwll.local> (raw)
In-Reply-To: <20200929151437.19717-8-tzimmermann@suse.de>
On Tue, Sep 29, 2020 at 05:14:37PM +0200, Thomas Zimmermann wrote:
> Instances of struct dma_buf_map should be useful throughout DRM's
> memory management code. Furthermore, several drivers can now use
> generic fbdev emulation.
>
> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
> ---
> Documentation/gpu/todo.rst | 24 ++++++++++++++++++++++--
> 1 file changed, 22 insertions(+), 2 deletions(-)
>
> diff --git a/Documentation/gpu/todo.rst b/Documentation/gpu/todo.rst
> index 3751ac976c3e..023626c1837b 100644
> --- a/Documentation/gpu/todo.rst
> +++ b/Documentation/gpu/todo.rst
> @@ -197,8 +197,10 @@ Convert drivers to use drm_fbdev_generic_setup()
> ------------------------------------------------
>
> Most drivers can use drm_fbdev_generic_setup(). Driver have to implement
> -atomic modesetting and GEM vmap support. Current generic fbdev emulation
> -expects the framebuffer in system memory (or system-like memory).
> +atomic modesetting and GEM vmap support. Historically, generic fbdev emulation
> +expected the framebuffer in system memory or system-like memory. By employing
> +struct dma_buf_map, drivers with frambuffers in I/O memory can be supported
> +as well.
>
> Contact: Maintainer of the driver you plan to convert
>
> @@ -446,6 +448,24 @@ Contact: Ville Syrjälä, Daniel Vetter
>
> Level: Intermediate
>
> +Use struct dma_buf_map throughout codebase
> +------------------------------------------
> +
> +Pointers to shared device memory are stored in struct dma_buf_map. Each
> +instance knows whether it refers to system or I/O memory. Most of the DRM-wide
> +interface have been converted to use struct dma_buf_map, but implementations
> +often still use raw pointers.
> +
> +The task is to use struct dma_buf_map where it makes sense.
> +
> +* Memory managers should use struct dma_buf_map for dma-buf-imported buffers.
> +* TTM might benefit from using struct dma_buf_map internally.
> +* Framebuffer copying and blitting helpers should operate on struct dma_buf_map.
> +
> +Contact: Thomas Zimmermann <tzimmermann@suse.de>, Christian König, Daniel Vetter
> +
> +Level: Intermediate
> +
>
> Core refactorings
> =================
> --
> 2.28.0
>
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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prev parent reply other threads:[~2020-10-02 18:46 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-29 15:14 [PATCH v3 0/7] Support GEM object mappings from I/O memory Thomas Zimmermann
2020-09-29 15:14 ` [PATCH v3 1/7] drm/vram-helper: Remove invariant parameters from internal kmap function Thomas Zimmermann
2020-10-02 9:48 ` Daniel Vetter
2020-09-29 15:14 ` [PATCH v3 2/7] drm/ttm: Add ttm_kmap_obj_to_dma_buf_map() for type conversion Thomas Zimmermann
2020-09-29 15:35 ` Christian König
2020-09-29 15:44 ` Daniel Vetter
2020-09-29 17:49 ` Thomas Zimmermann
[not found] ` <8a84f62b-33f3-f44c-52af-c859a0e0d1fb@gmail.com>
2020-09-30 8:19 ` Thomas Zimmermann
[not found] ` <b569b7e3-68f0-edcc-c8f4-170e9042d348@gmail.com>
2020-09-30 9:47 ` Daniel Vetter
2020-09-30 12:34 ` Christian König
2020-09-30 12:51 ` Daniel Vetter
2020-10-02 9:58 ` Daniel Vetter
2020-10-02 11:30 ` Christian König
2020-10-02 12:21 ` Daniel Vetter
2020-10-07 12:57 ` Thomas Zimmermann
2020-10-07 13:10 ` Daniel Vetter
2020-10-07 13:20 ` Thomas Zimmermann
2020-10-07 13:24 ` Christian König
2020-10-07 14:30 ` Daniel Vetter
2020-10-08 9:00 ` Thomas Zimmermann
2020-09-29 15:14 ` [PATCH v3 3/7] drm/gem: Use struct dma_buf_map in GEM vmap ops and convert GEM backends Thomas Zimmermann
2020-10-02 13:02 ` Daniel Vetter
2020-09-29 15:14 ` [PATCH v3 4/7] drm/gem: Update internal GEM vmap/vunmap interfaces to use struct dma_buf_map Thomas Zimmermann
2020-10-02 13:04 ` Daniel Vetter
2020-09-29 15:14 ` [PATCH v3 5/7] drm/gem: Store client buffer mappings as " Thomas Zimmermann
2020-10-02 13:05 ` Daniel Vetter
2020-09-29 15:14 ` [PATCH v3 6/7] drm/fb_helper: Support framebuffers in I/O memory Thomas Zimmermann
2020-10-02 18:05 ` Daniel Vetter
2020-10-02 18:44 ` Daniel Vetter
2020-10-08 9:25 ` Thomas Zimmermann
2020-10-08 9:35 ` Daniel Vetter
2020-09-29 15:14 ` [PATCH v3 7/7] drm/todo: Update entries around struct dma_buf_map Thomas Zimmermann
2020-10-02 18:45 ` Daniel Vetter [this message]
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