| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <3a4f6fc1-6632-43f0-a5ab-55694c3de55f@collabora.com>
Date: Mon, 16 Oct 2023 14:03:52 +0200
From: Benjamin Gaignard <benjamin.gaignard@...labora.com>
To: Hans Verkuil <hverkuil-cisco@...all.nl>, mchehab@...nel.org,
tfiga@...omium.org, m.szyprowski@...sung.com, ming.qian@....com,
ezequiel@...guardiasur.com.ar, p.zabel@...gutronix.de,
gregkh@...uxfoundation.org, nicolas.dufresne@...labora.com
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org, linux-arm-msm@...r.kernel.org,
linux-rockchip@...ts.infradead.org, linux-staging@...ts.linux.dev,
kernel@...labora.com
Subject: Re: [PATCH v11 00/56] Add DELETE_BUF ioctl
Le 16/10/2023 à 12:39, Hans Verkuil a écrit :
> Hi Benjamin,
>
> On 12/10/2023 13:45, Benjamin Gaignard wrote:
>> Unlike when resolution change on keyframes, dynamic resolution change
>> on inter frames doesn't allow to do a stream off/on sequence because
>> it is need to keep all previous references alive to decode inter frames.
>> This constraint have two main problems:
>> - more memory consumption.
>> - more buffers in use.
>> To solve these issue this series introduce DELETE_BUFS ioctl and remove
>> the 32 buffers limit per queue.
>>
>> VP9 conformance tests using fluster give a score of 210/305.
>> The 20 resize inter tests (vp90-2-21-resize_inter_* files) are ok
>> but require to use postprocessor.
>>
>> Kernel branch is available here:
>> https://gitlab.collabora.com/benjamin.gaignard/for-upstream/-/commits/remove_vb2_queue_limit_v11
>>
>> GStreamer branch to use DELETE_BUF ioctl and testing dynamic resolution
>> change is here:
>> https://gitlab.freedesktop.org/benjamin.gaignard1/gstreamer/-/commits/VP9_drc
> I did another review. Mainly small stuff, but I realized in my review of 40/56 that
> the use of min_buffers_needed is a mess, and you will need to revisit any driver
> patches where you change that value, or where you drop the number of buffers check
> in queue_setup because you rely on min_buffers_needed.
Ok I will comeback to the version where I only use vb2_get_num_buffers() is these drivers.
Regards,
Benjamin
>
> I think it is likely that we need to take another very good look at this before we
> implement VIDIOC_DELETE_BUFS.
>
> I have also posted a PR where I ask Mauro to merge patch 07/56 for 6.7 to get
> the vb2_get_num_buffers helper in. We'll see if that will happen since it is a
> bit late for that.
>
> Regards,
>
> Hans
>
>> changes in version 11:
>> - Patches ordering:
>> 1 to 3: clean up
>> 3 to 42: use vb2_get_buffer() and vb2_get_num_buffers()
>> 43 to 46: allow to use more than 32 buffers per queue
>> 47 to 50: allow verisilicon driver to do VP9 dynamic resolution change
>> (which was the main purpose of this work)
>> 51 to 56: prepare and introduce delete buffers feature.
>> - Add a patch to rename 'off' to offset.
>> - Add maintainers CC to drivers patches
>>
>> changes in version 10:
>> - Make BUFFER_INDEX_MASK definition more readable
>> - Rebase on media_stage/master branch and add a patch for nuvoton
>> driver.
>> - Fix issue on patch 13
>>
>> changes in version 9:
>> - BUFFER_INDEX_MASK now depends on PAGE_SHIFT value to match
>> architectures requirements.
>> - Correctly initialize max_num_buffers in vb2_core_queue_init()
>> - run 'test-media -kmemleak mc' on top of the series and on patches 1 to 47 without failures.
>> - fix compilation issue in patch 50
>>
>> changes in version 8:
>> - Add V4L2_BUF_CAP_SUPPORTS_SET_MAX_BUFS and new 'max_buffers' field in v4l2_create_buffers
>> structure to report the maximum number of buffers that a queue could allocate.
>> - Add V4L2_BUF_CAP_SUPPORTS_DELETE_BUFS to indicate that a queue support
>> DELETE_BUFS ioctl.
>> - Make some test drivers use more than 32 buffers and DELETE_BUFS ioctl.
>> - Fix remarks done by Hans
>> - Move "media: core: Rework how create_buf index returned value is
>> computed" patch to the top of the serie.
>>
>> changes in version 7:
>> - Use a bitmap to know which entries are valid in queue bufs array.
>> The number of buffers in the queue could must calculated from the
>> bitmap so num_buffers becomes useless. This led to add quite few
>> patches to remove it from all the drivers.
>> Note: despiste my attention I may have miss some calls to
>> num_buffers...
>> - Split patches to make them more readable.
>> - Run v4l2-compliance with additional delete-bufs tests.
>> - Run ./test-media -kmemleak vivid and no more failures.
>> Note: I had to remove USERPTR streaming test because they to much
>> frequentely hit get_framevec bug. It is not related to my series
>> since this happens all the time on master branch.
>> - Fix Hans remarks on v6
>>
>> changes in version 6:
>> - Get a patch per driver to use vb2_get_buffer() instead of directly access
>> to queue buffers array.
>> - Add lock in vb2_core_delete_buf()
>> - Use vb2_buffer instead of index
>> - Fix various comments
>> - Change buffer index name to BUFFER_INDEX_MASK
>> - Stop spamming kernel log with unbalanced counters
>>
>> Benjamin Gaignard (56):
>> media: videobuf2: Rename offset parameter
>> media: videobuf2: Rework offset 'cookie' encoding pattern
>> media: videobuf2: Stop spamming kernel log with all queue counter
>> media: videobuf2: Use vb2_buffer instead of index
>> media: videobuf2: Access vb2_queue bufs array through helper functions
>> media: videobuf2: Remove duplicated index vs q->num_buffers check
>> media: videobuf2: Add helper to get queue number of buffers
>> media: videobuf2: Use vb2_get_num_buffers() helper
>> media: amphion: Use vb2_get_buffer() instead of directly access to
>> buffers array
>> media: amphion: Stop direct calls to queue num_buffers field
>> media: mediatek: jpeg: Use vb2_get_buffer() instead of directly access
>> to buffers array
>> media: mediatek: vdec: Remove useless loop
>> media: mediatek: vcodec: Stop direct calls to queue num_buffers field
>> media: sti: hva: Use vb2_get_buffer() instead of directly access to
>> buffers array
>> media: visl: Use vb2_get_buffer() instead of directly access to
>> buffers array
>> media: atomisp: Use vb2_get_buffer() instead of directly access to
>> buffers array
>> media: atomisp: Stop direct calls to queue num_buffers field
>> media: dvb-core: Use vb2_get_buffer() instead of directly access to
>> buffers array
>> media: dvb-core: Do not initialize twice queue num_buffer field
>> media: dvb-frontends: rtl2832_srd: Use queue min_buffers_needed field
>> media: video-i2c: Set min_buffers_needed to 2
>> media: pci: cx18: Set correct value to min_buffers_needed field
>> media: pci: dt3155: Remove useless check
>> media: pci: netup_unidvb: Remove useless number of buffers check
>> media: pci: tw68: Stop direct calls to queue num_buffers field
>> media: pci: tw686x: Set min_buffers_needed to 3
>> media: coda: Stop direct calls to queue num_buffers field
>> media: nxp: Stop direct calls to queue num_buffers field
>> media: renesas: Set min_buffers_needed to 16
>> media: ti: Use queue min_buffers_needed field to set the min number of
>> buffers
>> media: verisilicon: Stop direct calls to queue num_buffers field
>> media: test-drivers: Stop direct calls to queue num_buffers field
>> media: usb: airspy: Set min_buffers_needed to 8
>> media: usb: cx231xx: Set min_buffers_needed to CX231XX_MIN_BUF
>> media: usb: hackrf: Set min_buffers_needed to 8
>> media: usb: usbtv: Set min_buffers_needed to 2
>> media: imx: Stop direct calls to queue num_buffers field
>> media: meson: vdec: Stop direct calls to queue num_buffers field
>> touchscreen: sur40: Stop direct calls to queue num_buffers field
>> sample: v4l: Stop direct calls to queue num_buffers field
>> media: cedrus: Stop direct calls to queue num_buffers field
>> media: nuvoton: Stop direct calls to queue num_buffers field
>> media: videobuf2: Be more flexible on the number of queue stored
>> buffers
>> media: core: Report the maximum possible number of buffers for the
>> queue
>> media: test-drivers: vivid: Increase max supported buffers for capture
>> queues
>> media: test-drivers: vicodec: Increase max supported capture queue
>> buffers
>> media: verisilicon: Refactor postprocessor to store more buffers
>> media: verisilicon: Store chroma and motion vectors offset
>> media: verisilicon: g2: Use common helpers to compute chroma and mv
>> offsets
>> media: verisilicon: vp9: Allow to change resolution while streaming
>> media: core: Rework how create_buf index returned value is computed
>> media: core: Add bitmap manage bufs array entries
>> media: core: Free range of buffers
>> media: v4l2: Add DELETE_BUFS ioctl
>> media: v4l2: Add mem2mem helpers for DELETE_BUFS ioctl
>> media: test-drivers: Use helper for DELETE_BUFS ioctl
>>
>> .../userspace-api/media/v4l/user-func.rst | 1 +
>> .../media/v4l/vidioc-create-bufs.rst | 8 +-
>> .../media/v4l/vidioc-delete-bufs.rst | 80 +++
>> .../media/v4l/vidioc-reqbufs.rst | 2 +
>> drivers/input/touchscreen/sur40.c | 5 +-
>> .../media/common/videobuf2/videobuf2-core.c | 567 +++++++++++-------
>> .../media/common/videobuf2/videobuf2-v4l2.c | 116 +++-
>> drivers/media/dvb-core/dvb_vb2.c | 17 +-
>> drivers/media/dvb-frontends/rtl2832_sdr.c | 9 +-
>> drivers/media/i2c/video-i2c.c | 5 +-
>> drivers/media/pci/cx18/cx18-streams.c | 13 +-
>> drivers/media/pci/dt3155/dt3155.c | 2 -
>> .../pci/netup_unidvb/netup_unidvb_core.c | 4 +-
>> drivers/media/pci/tw68/tw68-video.c | 6 +-
>> drivers/media/pci/tw686x/tw686x-video.c | 13 +-
>> drivers/media/platform/amphion/vpu_dbg.c | 30 +-
>> drivers/media/platform/amphion/vpu_v4l2.c | 4 +-
>> .../media/platform/chips-media/coda-common.c | 2 +-
>> .../platform/mediatek/jpeg/mtk_jpeg_core.c | 7 +-
>> .../vcodec/decoder/vdec/vdec_vp9_req_lat_if.c | 9 +-
>> .../mediatek/vcodec/encoder/mtk_vcodec_enc.c | 2 +-
>> drivers/media/platform/nuvoton/npcm-video.c | 2 +-
>> drivers/media/platform/nxp/imx7-media-csi.c | 7 +-
>> drivers/media/platform/renesas/rcar_drif.c | 8 +-
>> drivers/media/platform/st/sti/hva/hva-v4l2.c | 9 +-
>> .../media/platform/ti/am437x/am437x-vpfe.c | 7 +-
>> drivers/media/platform/ti/cal/cal-video.c | 5 +-
>> .../media/platform/ti/davinci/vpif_capture.c | 5 +-
>> .../media/platform/ti/davinci/vpif_display.c | 5 +-
>> drivers/media/platform/ti/omap/omap_vout.c | 5 +-
>> drivers/media/platform/verisilicon/hantro.h | 9 +-
>> .../media/platform/verisilicon/hantro_drv.c | 5 +-
>> .../media/platform/verisilicon/hantro_g2.c | 14 +
>> .../platform/verisilicon/hantro_g2_hevc_dec.c | 18 +-
>> .../platform/verisilicon/hantro_g2_vp9_dec.c | 28 +-
>> .../media/platform/verisilicon/hantro_hw.h | 7 +-
>> .../platform/verisilicon/hantro_postproc.c | 93 ++-
>> .../media/platform/verisilicon/hantro_v4l2.c | 27 +-
>> .../media/test-drivers/vicodec/vicodec-core.c | 3 +
>> drivers/media/test-drivers/vim2m.c | 2 +
>> .../media/test-drivers/vimc/vimc-capture.c | 2 +
>> drivers/media/test-drivers/visl/visl-dec.c | 32 +-
>> drivers/media/test-drivers/visl/visl-video.c | 2 +
>> drivers/media/test-drivers/vivid/vivid-core.c | 14 +
>> .../media/test-drivers/vivid/vivid-meta-cap.c | 3 -
>> .../media/test-drivers/vivid/vivid-meta-out.c | 5 +-
>> .../test-drivers/vivid/vivid-touch-cap.c | 5 +-
>> .../media/test-drivers/vivid/vivid-vbi-cap.c | 5 +-
>> .../media/test-drivers/vivid/vivid-vbi-out.c | 5 +-
>> .../media/test-drivers/vivid/vivid-vid-cap.c | 5 +-
>> .../media/test-drivers/vivid/vivid-vid-out.c | 5 +-
>> drivers/media/usb/airspy/airspy.c | 9 +-
>> drivers/media/usb/cx231xx/cx231xx-417.c | 4 +-
>> drivers/media/usb/cx231xx/cx231xx-video.c | 4 +-
>> drivers/media/usb/hackrf/hackrf.c | 9 +-
>> drivers/media/usb/usbtv/usbtv-video.c | 3 +-
>> drivers/media/v4l2-core/v4l2-dev.c | 1 +
>> drivers/media/v4l2-core/v4l2-ioctl.c | 21 +-
>> drivers/media/v4l2-core/v4l2-mem2mem.c | 20 +
>> .../staging/media/atomisp/pci/atomisp_ioctl.c | 4 +-
>> drivers/staging/media/imx/imx-media-capture.c | 7 +-
>> drivers/staging/media/meson/vdec/vdec.c | 13 +-
>> .../staging/media/sunxi/cedrus/cedrus_h264.c | 8 +-
>> .../staging/media/sunxi/cedrus/cedrus_h265.c | 9 +-
>> include/media/v4l2-ioctl.h | 4 +
>> include/media/v4l2-mem2mem.h | 12 +
>> include/media/videobuf2-core.h | 65 +-
>> include/media/videobuf2-v4l2.h | 13 +
>> include/uapi/linux/videodev2.h | 24 +-
>> samples/v4l/v4l2-pci-skeleton.c | 5 +-
>> 70 files changed, 972 insertions(+), 507 deletions(-)
>> create mode 100644 Documentation/userspace-api/media/v4l/vidioc-delete-bufs.rst
>>
>
Powered by blists - more mailing lists