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From: Jan Kara <jack@suse.cz>
To: linux-media@vger.kernel.org
Cc: Hans Verkuil <hans.verkuil@cisco.com>,
	Mauro Carvalho Chehab <mchehab@osg.samsung.com>,
	linux-mm@kvack.org, dri-devel@lists.freedesktop.org,
	David Airlie <airlied@linux.ie>, Jan Kara <jack@suse.cz>
Subject: [PATCH 0/9 v2] Helper to abstract vma handling in media layer
Date: Tue, 17 Mar 2015 12:56:30 +0100	[thread overview]
Message-ID: <1426593399-6549-1-git-send-email-jack@suse.cz> (raw)

  Hello,

  After a long pause I'm sending second version of my patch series to abstract
vma handling from the various media drivers. After this patch set drivers have
to know much less details about vmas, their types, and locking. My motivation
for the series is that I want to change get_user_pages() locking and I want to
handle subtle locking details in as few places as possible.

The core of the series is the new helper get_vaddr_pfns() which is given a
virtual address and it fills in PFNs into provided array. If PFNs correspond to
normal pages it also grabs references to these pages. The difference from
get_user_pages() is that this function can also deal with pfnmap, mixed, and io
mappings which is what the media drivers need.

I have tested the patches with vivid driver so at least vb2 code got some
exposure. Conversion of other drivers was just compile-tested so I'd like to
ask respective maintainers if they could have a look.  Also I'd like to ask mm
folks to check patch 2/9 implementing the helper. Thanks!

								Honza

WARNING: multiple messages have this Message-ID (diff)
From: Jan Kara <jack@suse.cz>
To: linux-media@vger.kernel.org
Cc: Hans Verkuil <hans.verkuil@cisco.com>,
	Mauro Carvalho Chehab <mchehab@osg.samsung.com>,
	linux-mm@kvack.org, dri-devel@lists.freedesktop.org,
	David Airlie <airlied@linux.ie>, Jan Kara <jack@suse.cz>
Subject: [PATCH 0/9 v2] Helper to abstract vma handling in media layer
Date: Tue, 17 Mar 2015 12:56:30 +0100	[thread overview]
Message-ID: <1426593399-6549-1-git-send-email-jack@suse.cz> (raw)

  Hello,

  After a long pause I'm sending second version of my patch series to abstract
vma handling from the various media drivers. After this patch set drivers have
to know much less details about vmas, their types, and locking. My motivation
for the series is that I want to change get_user_pages() locking and I want to
handle subtle locking details in as few places as possible.

The core of the series is the new helper get_vaddr_pfns() which is given a
virtual address and it fills in PFNs into provided array. If PFNs correspond to
normal pages it also grabs references to these pages. The difference from
get_user_pages() is that this function can also deal with pfnmap, mixed, and io
mappings which is what the media drivers need.

I have tested the patches with vivid driver so at least vb2 code got some
exposure. Conversion of other drivers was just compile-tested so I'd like to
ask respective maintainers if they could have a look.  Also I'd like to ask mm
folks to check patch 2/9 implementing the helper. Thanks!

								Honza

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             reply	other threads:[~2015-03-17 11:56 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-17 11:56 Jan Kara [this message]
2015-03-17 11:56 ` [PATCH 0/9 v2] Helper to abstract vma handling in media layer Jan Kara
2015-03-17 11:56 ` [PATCH 1/9] [media] vb2: Push mmap_sem down to memops Jan Kara
2015-03-17 11:56   ` Jan Kara
2015-03-17 11:56   ` Jan Kara
2015-03-17 11:56 ` [PATCH 2/9] mm: Provide new get_vaddr_pfns() helper Jan Kara
2015-03-17 11:56   ` Jan Kara
2015-04-30 15:55   ` Mel Gorman
2015-05-04 15:14     ` Jan Kara
2015-05-04 15:14       ` Jan Kara
2015-05-04 15:14       ` Jan Kara
2015-03-17 11:56 ` [PATCH 3/9] media: omap_vout: Convert omap_vout_uservirt_to_phys() to use get_vaddr_pfns() Jan Kara
2015-03-17 11:56   ` Jan Kara
2015-03-17 11:56   ` Jan Kara
2015-03-17 11:56 ` [PATCH 4/9] vb2: Provide helpers for mapping virtual addresses Jan Kara
2015-03-17 11:56   ` Jan Kara
2015-03-17 11:56   ` Jan Kara
2015-03-17 11:56 ` [PATCH 5/9] media: vb2: Convert vb2_dma_sg_get_userptr() to use pinned pfns Jan Kara
2015-03-17 11:56   ` Jan Kara
2015-03-17 11:56   ` Jan Kara
2015-03-17 11:56 ` [PATCH 6/9] media: vb2: Convert vb2_vmalloc_get_userptr() to use pfns vector Jan Kara
2015-03-17 11:56   ` Jan Kara
2015-03-17 11:56 ` [PATCH 7/9] media: vb2: Convert vb2_dc_get_userptr() " Jan Kara
2015-03-17 11:56   ` Jan Kara
2015-03-17 11:56   ` Jan Kara
2015-03-17 11:56 ` [PATCH 8/9] media: vb2: Remove unused functions Jan Kara
2015-03-17 11:56   ` Jan Kara
2015-03-17 11:56 ` [PATCH 9/9] drm/exynos: Convert g2d_userptr_get_dma_addr() to use get_vaddr_pfn() Jan Kara
2015-03-17 11:56   ` Jan Kara
2015-03-17 11:56   ` Jan Kara
2015-04-02 15:02 ` [PATCH 0/9 v2] Helper to abstract vma handling in media layer Jan Kara
2015-04-02 15:02   ` Jan Kara
2015-04-02 15:02   ` Jan Kara
2015-04-02 15:25   ` Hans Verkuil
2015-04-02 15:25     ` Hans Verkuil
2015-04-24 10:59     ` Marek Szyprowski
2015-04-24 10:59       ` Marek Szyprowski
2015-04-24 11:07       ` Hans Verkuil
2015-04-24 11:07         ` Hans Verkuil
2015-04-24 11:07         ` Hans Verkuil
2015-04-24 16:08         ` Jan Kara
2015-04-24 16:08           ` Jan Kara
2015-04-24 16:08           ` Jan Kara

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