From: Christoph Hellwig <hch@infradead.org>
To: Paul Cercueil <paul@crapouillou.net>
Cc: Christoph Hellwig <hch@infradead.org>,
Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Maxime Ripard <mripard@kernel.org>,
Thomas Zimmermann <tzimmermann@suse.de>,
David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
Sam Ravnborg <sam@ravnborg.org>,
od@zcrc.me, dri-devel@lists.freedesktop.org,
linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org
Subject: Re: [PATCH v2 3/5] drm: Add and export function drm_gem_cma_mmap_noncoherent
Date: Thu, 11 Mar 2021 12:36:42 +0000 [thread overview]
Message-ID: <20210311123642.GA1741910@infradead.org> (raw)
In-Reply-To: <3I1TPQ.E55GRWWDYVRG@crapouillou.net>
On Thu, Mar 11, 2021 at 12:32:27PM +0000, Paul Cercueil wrote:
> > dma_to_phys must not be used by drivers.
> >
> > I have a proper helper for this waiting for users:
> >
> > http://git.infradead.org/users/hch/misc.git/commitdiff/96a546e7229ec53aadbdb7936d1e5e6cb5958952
> >
> > If you can confirm the helpers works for you I can try to still sneak
> > it to Linus for 5.12 to ease the merge pain.
>
> I can try. How do I get a page pointer from a dma_addr_t?
You don't - you get it from using virt_to_page on the pointer returned
from dma_alloc_noncoherent. That beind said to keep the API sane I
should probably add a wrapper that does that for you.
next prev parent reply other threads:[~2021-03-11 12:38 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-07 20:28 [PATCH v2 0/5] Add option to mmap GEM buffers cached Paul Cercueil
2021-03-07 20:28 ` [PATCH v2 1/5] drm: Add and export function drm_gem_cma_create_noncoherent Paul Cercueil
2021-03-11 12:23 ` Christoph Hellwig
2021-03-07 20:28 ` [PATCH v2 2/5] drm: Add and export function drm_gem_cma_dumb_create_noncoherent Paul Cercueil
2021-03-07 20:28 ` [PATCH v2 3/5] drm: Add and export function drm_gem_cma_mmap_noncoherent Paul Cercueil
2021-03-11 12:26 ` Christoph Hellwig
2021-03-11 12:32 ` Paul Cercueil
2021-03-11 12:36 ` Christoph Hellwig [this message]
2021-03-11 16:12 ` Paul Cercueil
2021-03-12 16:36 ` Christoph Hellwig
2021-03-07 20:28 ` [PATCH v2 4/5] drm: Add and export function drm_gem_cma_sync_data Paul Cercueil
2021-03-11 12:28 ` Christoph Hellwig
2021-03-11 12:33 ` Paul Cercueil
2021-03-15 7:43 ` Thomas Zimmermann
2021-03-15 11:59 ` Paul Cercueil
2021-03-07 20:28 ` [PATCH v2 5/5] drm/ingenic: Add option to alloc cached GEM buffers Paul Cercueil
[not found] ` <20210308034727.1951-1-hdanton@sina.com>
2021-03-10 19:01 ` Paul Cercueil
[not found] ` <20210311022743.2542-1-hdanton@sina.com>
2021-03-11 12:10 ` Paul Cercueil
2021-03-11 12:30 ` Christoph Hellwig
2021-03-11 13:40 ` Paul Cercueil
2021-03-08 8:41 ` [PATCH v2 0/5] Add option to mmap GEM buffers cached Thomas Zimmermann
2021-03-10 19:02 ` Paul Cercueil
2021-03-11 7:52 ` Thomas Zimmermann
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210311123642.GA1741910@infradead.org \
--to=hch@infradead.org \
--cc=airlied@linux.ie \
--cc=daniel@ffwll.ch \
--cc=dri-devel@lists.freedesktop.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mips@vger.kernel.org \
--cc=maarten.lankhorst@linux.intel.com \
--cc=mripard@kernel.org \
--cc=od@zcrc.me \
--cc=paul@crapouillou.net \
--cc=sam@ravnborg.org \
--cc=tzimmermann@suse.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox