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Message-ID: <20240720071606.27930-3-yunfei.dong@mediatek.com>
Date: Sat, 20 Jul 2024 15:15:40 +0800
From: Yunfei Dong <yunfei.dong@...iatek.com>
To: Jeffrey Kardatzke <jkardatzke@...gle.com>,
Nícolas F . R . A . Prado
<nfraprado@...labora.com>, Nathan Hebert <nhebert@...omium.org>, Nicolas
Dufresne <nicolas.dufresne@...labora.com>, Hans Verkuil
<hverkuil-cisco@...all.nl>, AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>, Benjamin Gaignard
<benjamin.gaignard@...labora.com>, Sebastian Fricke
<sebastian.fricke@...labora.com>, Tomasz Figa <tfiga@...omium.org>, Mauro
Carvalho Chehab <mchehab@...nel.org>, Marek Szyprowski
<m.szyprowski@...sung.com>
CC: Chen-Yu Tsai <wenst@...omium.org>, Yong Wu <yong.wu@...iatek.com>, Hsin-Yi
Wang <hsinyi@...omium.org>, Fritz Koenig <frkoenig@...omium.org>, Daniel
Vetter <daniel@...ll.ch>, Steve Cho <stevecho@...omium.org>, Yunfei Dong
<yunfei.dong@...iatek.com>, Sumit Semwal <sumit.semwal@...aro.org>, Brian
Starkey <Brian.Starkey@....com>, John Stultz <jstultz@...gle.com>, "T . J .
Mercier" <tjmercier@...gle.com>, Christian König
<christian.koenig@....com>, Matthias Brugger <matthias.bgg@...il.com>,
<linux-media@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>,
<linux-kernel@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
<linux-mediatek@...ts.infradead.org>,
<Project_Global_Chrome_Upstream_Group@...iatek.com>
Subject: [PATCH v7 02/28] v4l2: handle restricted memory flags in queue setup
From: Jeffrey Kardatzke <jkardatzke@...gle.com>
Validates the restricted memory flags when setting up a queue and
ensures the queue has the proper capability.
Signed-off-by: Jeffrey Kardatzke <jkardatzke@...gle.com>
Signed-off-by: Yunfei Dong <yunfei.dong@...iatek.com>
[Yunfei: Change reviewer's comments]
---
.../media/common/videobuf2/videobuf2-core.c | 29 +++++++++++++++++++
.../media/common/videobuf2/videobuf2-v4l2.c | 4 ++-
2 files changed, 32 insertions(+), 1 deletion(-)
diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c
index 0217392fcc0d..44080121f37e 100644
--- a/drivers/media/common/videobuf2/videobuf2-core.c
+++ b/drivers/media/common/videobuf2/videobuf2-core.c
@@ -830,6 +830,23 @@ static bool verify_coherency_flags(struct vb2_queue *q, bool non_coherent_mem)
return true;
}
+static bool verify_restricted_mem_flags(struct vb2_queue *q, bool restricted_mem)
+{
+ if (restricted_mem != q->restricted_mem) {
+ dprintk(q, 1, "restricted memory model mismatch\n");
+ return false;
+ }
+
+ return true;
+}
+
+static inline int restricted_mem_mismatch(bool restricted_mem, struct vb2_queue *q,
+ enum vb2_memory memory)
+{
+ return restricted_mem && (!q->allow_restricted_mem || memory != VB2_MEMORY_DMABUF) ?
+ -1 : 0;
+}
+
static int vb2_core_allocated_buffers_storage(struct vb2_queue *q)
{
if (!q->bufs)
@@ -863,6 +880,7 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory,
unsigned int q_num_bufs = vb2_get_num_buffers(q);
unsigned plane_sizes[VB2_MAX_PLANES] = { };
bool non_coherent_mem = flags & V4L2_MEMORY_FLAG_NON_COHERENT;
+ bool restricted_mem = flags & V4L2_MEMORY_FLAG_RESTRICTED;
unsigned int i, first_index;
int ret = 0;
@@ -906,6 +924,9 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory,
return 0;
}
+ if (restricted_mem_mismatch(restricted_mem, q, memory))
+ return -EINVAL;
+
/*
* Make sure the requested values and current defaults are sane.
*/
@@ -923,6 +944,7 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory,
if (ret)
return ret;
set_queue_coherency(q, non_coherent_mem);
+ q->restricted_mem = restricted_mem;
/*
* Ask the driver how many buffers and planes per buffer it requires.
@@ -1031,6 +1053,7 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory,
unsigned plane_sizes[VB2_MAX_PLANES] = { };
bool non_coherent_mem = flags & V4L2_MEMORY_FLAG_NON_COHERENT;
unsigned int q_num_bufs = vb2_get_num_buffers(q);
+ bool restricted_mem = flags & V4L2_MEMORY_FLAG_RESTRICTED;
bool no_previous_buffers = !q_num_bufs;
int ret = 0;
@@ -1039,6 +1062,9 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory,
return -ENOBUFS;
}
+ if (restricted_mem_mismatch(restricted_mem, q, memory))
+ return -EINVAL;
+
if (no_previous_buffers) {
if (q->waiting_in_dqbuf && *count) {
dprintk(q, 1, "another dup()ped fd is waiting for a buffer\n");
@@ -1057,6 +1083,7 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory,
return ret;
q->waiting_for_buffers = !q->is_output;
set_queue_coherency(q, non_coherent_mem);
+ q->restricted_mem = restricted_mem;
} else {
if (q->memory != memory) {
dprintk(q, 1, "memory model mismatch\n");
@@ -1064,6 +1091,8 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory,
}
if (!verify_coherency_flags(q, non_coherent_mem))
return -EINVAL;
+ if (!verify_restricted_mem_flags(q, restricted_mem))
+ return -EINVAL;
}
num_buffers = min(*count, q->max_num_buffers - q_num_bufs);
diff --git a/drivers/media/common/videobuf2/videobuf2-v4l2.c b/drivers/media/common/videobuf2/videobuf2-v4l2.c
index 293f3d5f1c4e..9ee24e537e0c 100644
--- a/drivers/media/common/videobuf2/videobuf2-v4l2.c
+++ b/drivers/media/common/videobuf2/videobuf2-v4l2.c
@@ -682,7 +682,7 @@ static void vb2_set_flags_and_caps(struct vb2_queue *q, u32 memory,
*flags = 0;
} else {
/* Clear all unknown flags. */
- *flags &= V4L2_MEMORY_FLAG_NON_COHERENT;
+ *flags &= V4L2_MEMORY_FLAG_NON_COHERENT | V4L2_MEMORY_FLAG_RESTRICTED;
}
*caps |= V4L2_BUF_CAP_SUPPORTS_ORPHANED_BUFS;
@@ -698,6 +698,8 @@ static void vb2_set_flags_and_caps(struct vb2_queue *q, u32 memory,
*caps |= V4L2_BUF_CAP_SUPPORTS_MMAP_CACHE_HINTS;
if (q->supports_requests)
*caps |= V4L2_BUF_CAP_SUPPORTS_REQUESTS;
+ if (q->allow_restricted_mem && q->io_modes & VB2_DMABUF)
+ *caps |= V4L2_BUF_CAP_SUPPORTS_RESTRICTED_MEM;
if (max_num_bufs) {
*max_num_bufs = q->max_num_buffers;
*caps |= V4L2_BUF_CAP_SUPPORTS_MAX_NUM_BUFFERS;
--
2.18.0
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