From: Tomasz Figa <tfiga@chromium.org>
To: Benjamin Gaignard <benjamin.gaignard@collabora.com>
Cc: mchehab@kernel.org, m.szyprowski@samsung.com, ming.qian@nxp.com,
ezequiel@vanguardiasur.com.ar, p.zabel@pengutronix.de,
gregkh@linuxfoundation.org, hverkuil-cisco@xs4all.nl,
nicolas.dufresne@collabora.com, linux-media@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org,
linux-arm-msm@vger.kernel.org,
linux-rockchip@lists.infradead.org,
linux-staging@lists.linux.dev, kernel@collabora.com
Subject: Re: [PATCH v14 53/56] media: core: Free range of buffers
Date: Thu, 9 Nov 2023 09:10:18 +0000 [thread overview]
Message-ID: <20231109091018.tzodchqp44tmwq3k@chromium.org> (raw)
In-Reply-To: <20231031163104.112469-54-benjamin.gaignard@collabora.com>
On Tue, Oct 31, 2023 at 05:31:01PM +0100, Benjamin Gaignard wrote:
> Improve __vb2_queue_free() and __vb2_free_mem() to free
> range of buffers and not only the last few buffers.
> Intoduce starting index to be flexible on range and change the loops
> according to this parameters.
>
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
> ---
> .../media/common/videobuf2/videobuf2-core.c | 59 +++++++++----------
> 1 file changed, 28 insertions(+), 31 deletions(-)
>
> diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c
> index 6e88406fcae9..010a8bca0240 100644
> --- a/drivers/media/common/videobuf2/videobuf2-core.c
> +++ b/drivers/media/common/videobuf2/videobuf2-core.c
> @@ -519,15 +519,13 @@ static int __vb2_queue_alloc(struct vb2_queue *q, enum vb2_memory memory,
> /*
> * __vb2_free_mem() - release all video buffer memory for a given queue
This comment is kind of outdated. Maybe we should replace it with
release video buffer memory for a given range of buffers in a given
queue
?
> */
> -static void __vb2_free_mem(struct vb2_queue *q, unsigned int buffers)
> +static void __vb2_free_mem(struct vb2_queue *q, unsigned int start, unsigned int count)
> {
> - unsigned int buffer;
> + unsigned int i;
> struct vb2_buffer *vb;
> - unsigned int q_num_buffers = vb2_get_num_buffers(q);
>
> - for (buffer = q_num_buffers - buffers; buffer < q_num_buffers;
> - ++buffer) {
> - vb = vb2_get_buffer(q, buffer);
> + for (i = start; i < q->max_num_buffers && i < start + count; i++) {
We could make this (and all those numerous simialr iterations) more
efficient by using bitmap helpers (probably wrapped in some vb2 helpers),
e.g. for_each_set_bit_from() (vb2_for_each_buffer_from()?). It can be done
in a follow up patch separately from this series though.
> + vb = vb2_get_buffer(q, i);
> if (!vb)
> continue;
>
> @@ -542,35 +540,35 @@ static void __vb2_free_mem(struct vb2_queue *q, unsigned int buffers)
> }
>
> /*
> - * __vb2_queue_free() - free buffers at the end of the queue - video memory and
> + * __vb2_queue_free() - free count buffers from start index of the queue - video memory and
nit: How about using the @count and @start notation to refer the argument
names? (Can be done with a follow up patch outside of this series later.)
> * related information, if no buffers are left return the queue to an
> * uninitialized state. Might be called even if the queue has already been freed.
> */
> -static void __vb2_queue_free(struct vb2_queue *q, unsigned int buffers)
> +static void __vb2_queue_free(struct vb2_queue *q, unsigned int start, unsigned int count)
> {
> - unsigned int buffer;
> - unsigned int q_num_buffers = vb2_get_num_buffers(q);
> + unsigned int i;
>
> lockdep_assert_held(&q->mmap_lock);
>
> /* Call driver-provided cleanup function for each buffer, if provided */
> - for (buffer = q_num_buffers - buffers; buffer < q_num_buffers;
> - ++buffer) {
> - struct vb2_buffer *vb = vb2_get_buffer(q, buffer);
> + for (i = start; i < q->max_num_buffers && i < start + count; i++) {
> + struct vb2_buffer *vb = vb2_get_buffer(q, i);
>
> - if (vb && vb->planes[0].mem_priv)
> + if (!vb)
> + continue;
> + if (vb->planes[0].mem_priv)
nit: Not sure if we really had to change this, but I'm fine with either.
Best regards,
Tomasz
next prev parent reply other threads:[~2023-11-09 9:10 UTC|newest]
Thread overview: 133+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-31 16:30 [PATCH v14 00/56] Add DELETE_BUF ioctl Benjamin Gaignard
2023-10-31 16:30 ` [PATCH v14 01/56] media: videobuf2: Rename offset parameter Benjamin Gaignard
2023-11-08 15:11 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 02/56] media: videobuf2: Rework offset 'cookie' encoding pattern Benjamin Gaignard
2023-11-08 6:23 ` Tomasz Figa
2023-11-08 10:14 ` Benjamin Gaignard
2023-11-08 10:31 ` Hans Verkuil
2023-10-31 16:30 ` [PATCH v14 03/56] media: videobuf2: Stop spamming kernel log with all queue counter Benjamin Gaignard
2023-11-08 15:26 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 04/56] media: videobuf2: Use vb2_buffer instead of index Benjamin Gaignard
2023-11-08 8:08 ` Tomasz Figa
2023-11-08 15:52 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 05/56] media: videobuf2: Access vb2_queue bufs array through helper functions Benjamin Gaignard
2023-11-08 8:50 ` Tomasz Figa
2023-11-08 10:24 ` Benjamin Gaignard
2023-11-09 4:27 ` Tomasz Figa
2023-10-31 16:30 ` [PATCH v14 06/56] media: videobuf2: Remove duplicated index vs q->num_buffers check Benjamin Gaignard
2023-11-08 16:46 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 07/56] media: videobuf2: Add helper to get queue number of buffers Benjamin Gaignard
2023-11-08 16:50 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 08/56] media: videobuf2: Use vb2_get_num_buffers() helper Benjamin Gaignard
2023-11-08 9:42 ` Tomasz Figa
2023-11-08 13:22 ` Benjamin Gaignard
2023-11-09 4:36 ` Tomasz Figa
2023-10-31 16:30 ` [PATCH v14 09/56] media: amphion: Use vb2_get_buffer() instead of directly access to buffers array Benjamin Gaignard
2023-11-08 16:55 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 10/56] media: amphion: Stop direct calls to queue num_buffers field Benjamin Gaignard
2023-11-08 16:56 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 11/56] media: mediatek: jpeg: Use vb2_get_buffer() instead of directly access to buffers array Benjamin Gaignard
2023-11-08 17:00 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 12/56] media: mediatek: vdec: Remove useless loop Benjamin Gaignard
2023-11-09 9:15 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 13/56] media: mediatek: vcodec: Stop direct calls to queue num_buffers field Benjamin Gaignard
2023-11-09 9:21 ` Andrzej Pietrasiewicz
2023-11-09 9:23 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 14/56] media: sti: hva: Use vb2_get_buffer() instead of directly access to buffers array Benjamin Gaignard
2023-11-09 9:29 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 15/56] media: visl: " Benjamin Gaignard
2023-11-09 9:38 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 16/56] media: atomisp: " Benjamin Gaignard
2023-10-31 16:30 ` [PATCH v14 17/56] media: atomisp: Stop direct calls to queue num_buffers field Benjamin Gaignard
2023-10-31 16:30 ` [PATCH v14 18/56] media: dvb-core: Use vb2_get_buffer() instead of directly access to buffers array Benjamin Gaignard
2023-11-09 9:46 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 19/56] media: dvb-core: Do not initialize twice queue num_buffer field Benjamin Gaignard
2023-11-09 9:50 ` Andrzej Pietrasiewicz
2023-11-09 10:14 ` Benjamin Gaignard
2023-10-31 16:30 ` [PATCH v14 20/56] media: dvb-frontends: rtl2832: Stop direct calls to queue num_buffers field Benjamin Gaignard
2023-11-09 9:56 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 21/56] media: pci: dt3155: Remove useless check Benjamin Gaignard
2023-11-09 10:03 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 22/56] media: pci: tw686x: Stop direct calls to queue num_buffers field Benjamin Gaignard
2023-11-09 10:05 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 23/56] media: pci: cx18: " Benjamin Gaignard
2023-11-09 10:07 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 24/56] media: pci: netup_unidvb: " Benjamin Gaignard
2023-11-09 10:09 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 25/56] media: pci: tw68: " Benjamin Gaignard
2023-11-09 10:13 ` Andrzej Pietrasiewicz
2023-11-09 10:23 ` Benjamin Gaignard
2023-10-31 16:30 ` [PATCH v14 26/56] media: i2c: video-i2c: " Benjamin Gaignard
2023-11-09 10:18 ` Andrzej Pietrasiewicz
2023-11-09 10:26 ` Benjamin Gaignard
2023-10-31 16:30 ` [PATCH v14 27/56] media: coda: " Benjamin Gaignard
2023-11-09 10:22 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 28/56] media: nxp: " Benjamin Gaignard
2023-11-09 10:26 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 29/56] media: verisilicon: " Benjamin Gaignard
2023-11-09 10:28 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 30/56] media: test-drivers: " Benjamin Gaignard
2023-11-09 11:10 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 31/56] media: imx: " Benjamin Gaignard
2023-11-09 11:12 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 32/56] media: meson: vdec: " Benjamin Gaignard
2023-11-09 11:17 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 33/56] touchscreen: sur40: " Benjamin Gaignard
2023-11-09 11:19 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 34/56] sample: v4l: " Benjamin Gaignard
2023-11-09 11:19 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 35/56] media: cedrus: " Benjamin Gaignard
2023-11-09 11:27 ` Andrzej Pietrasiewicz
2023-11-09 14:14 ` Paul Kocialkowski
2023-11-09 15:48 ` Andrzej Pietrasiewicz
2023-11-09 15:54 ` Benjamin Gaignard
2023-11-09 16:29 ` Paul Kocialkowski
2023-10-31 16:30 ` [PATCH v14 36/56] media: nuvoton: " Benjamin Gaignard
2023-11-09 11:29 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 37/56] media: renesas: " Benjamin Gaignard
2023-11-09 11:30 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 38/56] media: ti: " Benjamin Gaignard
2023-11-09 11:32 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 39/56] media: usb: airspy: " Benjamin Gaignard
2023-11-09 11:33 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 40/56] media: usb: cx231xx: " Benjamin Gaignard
2023-11-09 11:35 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 41/56] media: usb: hackrf: " Benjamin Gaignard
2023-11-09 11:36 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 42/56] media: usb: usbtv: " Benjamin Gaignard
2023-11-09 11:37 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 43/56] media: videobuf2: Be more flexible on the number of queue stored buffers Benjamin Gaignard
2023-11-02 8:17 ` Hans Verkuil
2023-11-06 14:29 ` Benjamin Gaignard
2023-10-31 16:30 ` [PATCH v14 44/56] media: core: Report the maximum possible number of buffers for the queue Benjamin Gaignard
2023-11-09 12:28 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 45/56] media: test-drivers: vivid: Increase max supported buffers for capture queues Benjamin Gaignard
2023-11-09 12:31 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 46/56] media: test-drivers: vicodec: Increase max supported capture queue buffers Benjamin Gaignard
2023-11-09 12:32 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 47/56] media: verisilicon: Refactor postprocessor to store more buffers Benjamin Gaignard
2023-11-09 13:58 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 48/56] media: verisilicon: Store chroma and motion vectors offset Benjamin Gaignard
2023-11-09 14:12 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 49/56] media: verisilicon: g2: Use common helpers to compute chroma and mv offsets Benjamin Gaignard
2023-11-09 14:25 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 50/56] media: verisilicon: vp9: Allow to change resolution while streaming Benjamin Gaignard
2023-11-09 14:59 ` Andrzej Pietrasiewicz
2023-10-31 16:30 ` [PATCH v14 51/56] media: core: Rework how create_buf index returned value is computed Benjamin Gaignard
2023-10-31 16:31 ` [PATCH v14 52/56] media: core: Add bitmap manage bufs array entries Benjamin Gaignard
2023-11-08 10:44 ` Tomasz Figa
2023-11-08 15:30 ` Benjamin Gaignard
2023-11-09 7:28 ` Tomasz Figa
2023-10-31 16:31 ` [PATCH v14 53/56] media: core: Free range of buffers Benjamin Gaignard
2023-11-09 9:10 ` Tomasz Figa [this message]
2023-10-31 16:31 ` [PATCH v14 54/56] media: v4l2: Add DELETE_BUFS ioctl Benjamin Gaignard
2023-11-09 9:30 ` Tomasz Figa
2023-11-09 10:10 ` Benjamin Gaignard
2023-11-10 8:58 ` Tomasz Figa
2023-11-10 9:14 ` Hans Verkuil
2023-11-10 9:19 ` Tomasz Figa
2023-10-31 16:31 ` [PATCH v14 55/56] media: v4l2: Add mem2mem helpers for " Benjamin Gaignard
2023-10-31 16:31 ` [PATCH v14 56/56] media: test-drivers: Use helper " Benjamin Gaignard
2023-11-09 9:43 ` Tomasz Figa
2023-11-09 9:46 ` Benjamin Gaignard
2023-11-09 9:48 ` Tomasz Figa
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