From: Benjamin Gaignard <benjamin.gaignard@collabora.com>
To: tfiga@chromium.org, m.szyprowski@samsung.com, mchehab@kernel.org,
ming.qian@nxp.com, shijie.qin@nxp.com, eagle.zhou@nxp.com,
bin.liu@mediatek.com, matthias.bgg@gmail.com,
angelogioacchino.delregno@collabora.com,
tiffany.lin@mediatek.com, andrew-ct.chen@mediatek.com,
yunfei.dong@mediatek.com, stanimir.k.varbanov@gmail.com,
quic_vgarodia@quicinc.com, agross@kernel.org,
andersson@kernel.org, konrad.dybcio@linaro.org,
ezequiel@vanguardiasur.com.ar, p.zabel@pengutronix.de,
daniel.almeida@collabora.com, hverkuil-cisco@xs4all.nl,
laurent.pinchart@ideasonboard.com, jernel@kernel.org
Cc: 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, kernel@collabora.com,
Benjamin Gaignard <benjamin.gaignard@collabora.com>
Subject: [PATCH v2 3/8] media: videobuf2: Add a module param to limit vb2 queue buffer storage
Date: Tue, 21 Mar 2023 11:28:50 +0100 [thread overview]
Message-ID: <20230321102855.346732-4-benjamin.gaignard@collabora.com> (raw)
In-Reply-To: <20230321102855.346732-1-benjamin.gaignard@collabora.com>
Add module parameter "max_vb_buffer_per_queue" to be able to limit
the number of vb2 buffers store in queue.
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
---
drivers/media/common/videobuf2/videobuf2-core.c | 15 +++------------
include/media/videobuf2-core.h | 11 +++++++++--
2 files changed, 12 insertions(+), 14 deletions(-)
diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c
index ae9d72f4d181..f4da917ccf3f 100644
--- a/drivers/media/common/videobuf2/videobuf2-core.c
+++ b/drivers/media/common/videobuf2/videobuf2-core.c
@@ -34,6 +34,8 @@
static int debug;
module_param(debug, int, 0644);
+module_param(max_vb_buffer_per_queue, ulong, 0644);
+
#define dprintk(q, level, fmt, arg...) \
do { \
if (debug >= level) \
@@ -412,10 +414,6 @@ static int __vb2_queue_alloc(struct vb2_queue *q, enum vb2_memory memory,
struct vb2_buffer *vb;
int ret;
- /* Ensure that q->num_buffers+num_buffers is below VB2_MAX_FRAME */
- num_buffers = min_t(unsigned int, num_buffers,
- VB2_MAX_FRAME - q->num_buffers);
-
for (buffer = 0; buffer < num_buffers; ++buffer) {
/* Allocate vb2 buffer structures */
vb = kzalloc(q->buf_struct_size, GFP_KERNEL);
@@ -801,9 +799,7 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory,
/*
* Make sure the requested values and current defaults are sane.
*/
- WARN_ON(q->min_buffers_needed > VB2_MAX_FRAME);
num_buffers = max_t(unsigned int, *count, q->min_buffers_needed);
- num_buffers = min_t(unsigned int, num_buffers, VB2_MAX_FRAME);
memset(q->alloc_devs, 0, sizeof(q->alloc_devs));
/*
* Set this now to ensure that drivers see the correct q->memory value
@@ -919,11 +915,6 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory,
bool no_previous_buffers = !q->num_buffers;
int ret;
- if (q->num_buffers == VB2_MAX_FRAME) {
- dprintk(q, 1, "maximum number of buffers already allocated\n");
- return -ENOBUFS;
- }
-
if (no_previous_buffers) {
if (q->waiting_in_dqbuf && *count) {
dprintk(q, 1, "another dup()ped fd is waiting for a buffer\n");
@@ -948,7 +939,7 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory,
return -EINVAL;
}
- num_buffers = min(*count, VB2_MAX_FRAME - q->num_buffers);
+ num_buffers = *count;
if (requested_planes && requested_sizes) {
num_planes = requested_planes;
diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h
index 397dbf6e61e1..b8b34a993e04 100644
--- a/include/media/videobuf2-core.h
+++ b/include/media/videobuf2-core.h
@@ -12,6 +12,7 @@
#ifndef _MEDIA_VIDEOBUF2_CORE_H
#define _MEDIA_VIDEOBUF2_CORE_H
+#include <linux/minmax.h>
#include <linux/mm_types.h>
#include <linux/mutex.h>
#include <linux/poll.h>
@@ -48,6 +49,8 @@ struct vb2_fileio_data;
struct vb2_threadio_data;
struct vb2_buffer;
+static size_t max_vb_buffer_per_queue = 1024;
+
/**
* struct vb2_mem_ops - memory handling/memory allocator operations.
* @alloc: allocate video memory and, optionally, allocator private data,
@@ -1268,12 +1271,16 @@ static inline bool vb2_queue_add_buffer(struct vb2_queue *q, struct vb2_buffer *
if (vb->index >= q->max_num_bufs) {
struct vb2_buffer **tmp;
+ int cnt = min(max_vb_buffer_per_queue, q->max_num_bufs * 2);
+
+ if (cnt >= q->max_num_bufs)
+ goto realloc_failed;
- tmp = krealloc_array(q->bufs, q->max_num_bufs * 2, sizeof(*q->bufs), GFP_KERNEL);
+ tmp = krealloc_array(q->bufs, cnt, sizeof(*q->bufs), GFP_KERNEL);
if (!tmp)
goto realloc_failed;
- q->max_num_bufs *= 2;
+ q->max_num_bufs = cnt;
q->bufs = tmp;
}
--
2.34.1
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next prev parent reply other threads:[~2023-03-21 10:29 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-21 10:28 [PATCH v2 0/8] Add DELETE_BUF ioctl Benjamin Gaignard
2023-03-21 10:28 ` [PATCH v2 1/8] media: videobuf2: Access vb2_queue bufs array through helper functions Benjamin Gaignard
2023-03-21 17:42 ` kernel test robot
2023-05-18 10:37 ` Tomasz Figa
2023-03-21 10:28 ` [PATCH v2 2/8] media: videobuf2: Make bufs array dynamic allocated Benjamin Gaignard
2023-03-21 18:16 ` Laurent Pinchart
2023-05-19 10:04 ` Tomasz Figa
2023-03-24 5:01 ` Dan Carpenter
2023-03-24 8:11 ` Benjamin Gaignard
2023-03-24 8:31 ` Hans Verkuil
2023-03-24 8:48 ` Laurent Pinchart
2023-03-24 8:52 ` Hans Verkuil
2023-03-24 8:56 ` Benjamin Gaignard
2023-05-19 10:00 ` Tomasz Figa
2023-03-24 13:02 ` Dmitry Osipenko
2023-03-21 10:28 ` Benjamin Gaignard [this message]
2023-03-21 17:01 ` [PATCH v2 3/8] media: videobuf2: Add a module param to limit vb2 queue buffer storage kernel test robot
2023-03-21 19:15 ` kernel test robot
2023-03-22 6:22 ` [EXT] " Ming Qian
2023-05-19 10:19 ` Tomasz Figa
2023-05-30 17:38 ` Laurent Pinchart
2023-05-31 6:36 ` Hans Verkuil
2023-05-31 8:03 ` Laurent Pinchart
2023-05-31 8:30 ` Hans Verkuil
2023-05-31 12:39 ` Laurent Pinchart
2023-06-01 8:03 ` Benjamin Gaignard
2023-06-01 8:34 ` Laurent Pinchart
2023-06-08 10:24 ` Tomasz Figa
2023-06-08 10:42 ` Laurent Pinchart
2023-03-21 10:28 ` [PATCH v2 4/8] media: videobuf2: Stop define VB2_MAX_FRAME as global Benjamin Gaignard
2023-05-23 7:14 ` Tomasz Figa
2023-03-21 10:28 ` [PATCH v2 5/8] media: v4l2: Add DELETE_BUF ioctl Benjamin Gaignard
2023-03-21 20:06 ` kernel test robot
2023-05-23 8:23 ` Tomasz Figa
2023-03-21 10:28 ` [PATCH v2 6/8] media: v4l2: Add mem2mem helpers for " Benjamin Gaignard
2023-03-21 10:28 ` [PATCH v2 7/8] media: vim2m: Use v4l2-mem2mem helpers for VIDIOC_DELETE_BUF ioctl Benjamin Gaignard
2023-03-21 10:28 ` [PATCH v2 8/8] media: verisilicon: " Benjamin Gaignard
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