From: Dmitry Osipenko <dmitry.osipenko@collabora.com>
To: "David Airlie" <airlied@linux.ie>,
"Gerd Hoffmann" <kraxel@redhat.com>,
"Gurchetan Singh" <gurchetansingh@chromium.org>,
"Chia-I Wu" <olvaffe@gmail.com>,
"Daniel Vetter" <daniel@ffwll.ch>,
"Daniel Almeida" <daniel.almeida@collabora.com>,
"Gert Wollny" <gert.wollny@collabora.com>,
"Gustavo Padovan" <gustavo.padovan@collabora.com>,
"Daniel Stone" <daniel@fooishbar.org>,
"Tomeu Vizoso" <tomeu.vizoso@collabora.com>,
"Maarten Lankhorst" <maarten.lankhorst@linux.intel.com>,
"Maxime Ripard" <mripard@kernel.org>,
"Thomas Zimmermann" <tzimmermann@suse.de>,
"Rob Clark" <robdclark@gmail.com>,
"Sumit Semwal" <sumit.semwal@linaro.org>,
"Christian König" <christian.koenig@amd.com>,
"Pan, Xinhui" <Xinhui.Pan@amd.com>,
"Thierry Reding" <thierry.reding@gmail.com>,
"Tomasz Figa" <tfiga@chromium.org>,
"Marek Szyprowski" <m.szyprowski@samsung.com>,
"Mauro Carvalho Chehab" <mchehab@kernel.org>,
"Alex Deucher" <alexander.deucher@amd.com>,
"Jani Nikula" <jani.nikula@linux.intel.com>,
"Joonas Lahtinen" <joonas.lahtinen@linux.intel.com>,
"Rodrigo Vivi" <rodrigo.vivi@intel.com>,
"Tvrtko Ursulin" <tvrtko.ursulin@linux.intel.com>,
"Thomas Hellström" <thomas_os@shipmail.org>,
"Qiang Yu" <yuq825@gmail.com>,
"Srinivas Kandagatla" <srinivas.kandagatla@linaro.org>,
"Amol Maheshwari" <amahesh@qti.qualcomm.com>,
"Jason Gunthorpe" <jgg@ziepe.ca>,
"Leon Romanovsky" <leon@kernel.org>,
"Juergen Gross" <jgross@suse.com>,
"Stefano Stabellini" <sstabellini@kernel.org>,
"Oleksandr Tyshchenko" <oleksandr_tyshchenko@epam.com>,
"Tomi Valkeinen" <tomba@kernel.org>,
"Russell King" <linux@armlinux.org.uk>,
"Lucas Stach" <l.stach@pengutronix.de>,
"Christian Gmeiner" <christian.gmeiner@gmail.com>,
"Ruhl Michael J" <michael.j.ruhl@intel.com>
Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
Dmitry Osipenko <digetx@gmail.com>,
linux-media@vger.kernel.org, linaro-mm-sig@lists.linaro.org,
amd-gfx@lists.freedesktop.org, intel-gfx@lists.freedesktop.org,
kernel@collabora.com, virtualization@lists.linux-foundation.org,
linux-rdma@vger.kernel.org, linux-arm-msm@vger.kernel.org
Subject: [PATCH v6 20/21] media: videobuf2: Stop using internal dma-buf lock
Date: Wed, 28 Sep 2022 22:15:59 +0300 [thread overview]
Message-ID: <20220928191600.5874-21-dmitry.osipenko@collabora.com> (raw)
In-Reply-To: <20220928191600.5874-1-dmitry.osipenko@collabora.com>
All drivers that use dma-bufs have been moved to the updated locking
specification and now dma-buf reservation is guaranteed to be locked
by importers during the mapping operations. There is no need to take
the internal dma-buf lock anymore. Remove locking from the videobuf2
memory allocators.
Acked-by: Tomasz Figa <tfiga@chromium.org>
Acked-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
---
drivers/media/common/videobuf2/videobuf2-dma-contig.c | 11 +----------
drivers/media/common/videobuf2/videobuf2-dma-sg.c | 11 +----------
drivers/media/common/videobuf2/videobuf2-vmalloc.c | 11 +----------
3 files changed, 3 insertions(+), 30 deletions(-)
diff --git a/drivers/media/common/videobuf2/videobuf2-dma-contig.c b/drivers/media/common/videobuf2/videobuf2-dma-contig.c
index 79f4d8301fbb..555bd40fa472 100644
--- a/drivers/media/common/videobuf2/videobuf2-dma-contig.c
+++ b/drivers/media/common/videobuf2/videobuf2-dma-contig.c
@@ -382,18 +382,12 @@ static struct sg_table *vb2_dc_dmabuf_ops_map(
struct dma_buf_attachment *db_attach, enum dma_data_direction dma_dir)
{
struct vb2_dc_attachment *attach = db_attach->priv;
- /* stealing dmabuf mutex to serialize map/unmap operations */
- struct mutex *lock = &db_attach->dmabuf->lock;
struct sg_table *sgt;
- mutex_lock(lock);
-
sgt = &attach->sgt;
/* return previously mapped sg table */
- if (attach->dma_dir == dma_dir) {
- mutex_unlock(lock);
+ if (attach->dma_dir == dma_dir)
return sgt;
- }
/* release any previous cache */
if (attach->dma_dir != DMA_NONE) {
@@ -409,14 +403,11 @@ static struct sg_table *vb2_dc_dmabuf_ops_map(
if (dma_map_sgtable(db_attach->dev, sgt, dma_dir,
DMA_ATTR_SKIP_CPU_SYNC)) {
pr_err("failed to map scatterlist\n");
- mutex_unlock(lock);
return ERR_PTR(-EIO);
}
attach->dma_dir = dma_dir;
- mutex_unlock(lock);
-
return sgt;
}
diff --git a/drivers/media/common/videobuf2/videobuf2-dma-sg.c b/drivers/media/common/videobuf2/videobuf2-dma-sg.c
index 36ecdea8d707..36981a5b5c53 100644
--- a/drivers/media/common/videobuf2/videobuf2-dma-sg.c
+++ b/drivers/media/common/videobuf2/videobuf2-dma-sg.c
@@ -424,18 +424,12 @@ static struct sg_table *vb2_dma_sg_dmabuf_ops_map(
struct dma_buf_attachment *db_attach, enum dma_data_direction dma_dir)
{
struct vb2_dma_sg_attachment *attach = db_attach->priv;
- /* stealing dmabuf mutex to serialize map/unmap operations */
- struct mutex *lock = &db_attach->dmabuf->lock;
struct sg_table *sgt;
- mutex_lock(lock);
-
sgt = &attach->sgt;
/* return previously mapped sg table */
- if (attach->dma_dir == dma_dir) {
- mutex_unlock(lock);
+ if (attach->dma_dir == dma_dir)
return sgt;
- }
/* release any previous cache */
if (attach->dma_dir != DMA_NONE) {
@@ -446,14 +440,11 @@ static struct sg_table *vb2_dma_sg_dmabuf_ops_map(
/* mapping to the client with new direction */
if (dma_map_sgtable(db_attach->dev, sgt, dma_dir, 0)) {
pr_err("failed to map scatterlist\n");
- mutex_unlock(lock);
return ERR_PTR(-EIO);
}
attach->dma_dir = dma_dir;
- mutex_unlock(lock);
-
return sgt;
}
diff --git a/drivers/media/common/videobuf2/videobuf2-vmalloc.c b/drivers/media/common/videobuf2/videobuf2-vmalloc.c
index 7831bf545874..41db707e43a4 100644
--- a/drivers/media/common/videobuf2/videobuf2-vmalloc.c
+++ b/drivers/media/common/videobuf2/videobuf2-vmalloc.c
@@ -267,18 +267,12 @@ static struct sg_table *vb2_vmalloc_dmabuf_ops_map(
struct dma_buf_attachment *db_attach, enum dma_data_direction dma_dir)
{
struct vb2_vmalloc_attachment *attach = db_attach->priv;
- /* stealing dmabuf mutex to serialize map/unmap operations */
- struct mutex *lock = &db_attach->dmabuf->lock;
struct sg_table *sgt;
- mutex_lock(lock);
-
sgt = &attach->sgt;
/* return previously mapped sg table */
- if (attach->dma_dir == dma_dir) {
- mutex_unlock(lock);
+ if (attach->dma_dir == dma_dir)
return sgt;
- }
/* release any previous cache */
if (attach->dma_dir != DMA_NONE) {
@@ -289,14 +283,11 @@ static struct sg_table *vb2_vmalloc_dmabuf_ops_map(
/* mapping to the client with new direction */
if (dma_map_sgtable(db_attach->dev, sgt, dma_dir, 0)) {
pr_err("failed to map scatterlist\n");
- mutex_unlock(lock);
return ERR_PTR(-EIO);
}
attach->dma_dir = dma_dir;
- mutex_unlock(lock);
-
return sgt;
}
--
2.37.3
next prev parent reply other threads:[~2022-09-28 19:20 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-28 19:15 [PATCH v6 00/21] Move all drivers to a common dma-buf locking convention Dmitry Osipenko
2022-09-28 19:15 ` [PATCH v6 01/21] dma-buf: Add unlocked variant of vmapping functions Dmitry Osipenko
2022-09-28 19:15 ` [PATCH v6 02/21] dma-buf: Add unlocked variant of attachment-mapping functions Dmitry Osipenko
2022-09-28 19:15 ` [PATCH v6 03/21] drm/gem: Take reservation lock for vmap/vunmap operations Dmitry Osipenko
2022-09-28 19:15 ` [PATCH v6 04/21] drm/prime: Prepare to dynamic dma-buf locking specification Dmitry Osipenko
2022-09-28 19:15 ` [PATCH v6 05/21] drm/armada: " Dmitry Osipenko
2022-09-28 19:15 ` [PATCH v6 06/21] drm/i915: " Dmitry Osipenko
2022-09-28 19:15 ` [PATCH v6 07/21] drm/omapdrm: " Dmitry Osipenko
2022-09-28 19:15 ` [PATCH v6 08/21] drm/tegra: " Dmitry Osipenko
2022-09-28 19:15 ` [PATCH v6 09/21] drm/etnaviv: " Dmitry Osipenko
2022-09-28 19:15 ` [PATCH v6 10/21] RDMA/umem: " Dmitry Osipenko
2022-10-09 0:08 ` Dmitry Osipenko
2022-10-10 18:56 ` Jason Gunthorpe
2022-09-28 19:15 ` [PATCH v6 11/21] misc: fastrpc: " Dmitry Osipenko
2022-09-28 19:15 ` [PATCH v6 12/21] xen/gntdev: " Dmitry Osipenko
2022-09-28 19:15 ` [PATCH v6 13/21] media: videobuf2: " Dmitry Osipenko
2022-09-28 19:15 ` [PATCH v6 14/21] media: tegra-vde: " Dmitry Osipenko
2022-09-28 19:15 ` [PATCH v6 15/21] dma-buf: Move dma_buf_vmap() to dynamic " Dmitry Osipenko
2022-09-28 19:15 ` [PATCH v6 16/21] dma-buf: Move dma_buf_attach() " Dmitry Osipenko
2022-09-28 19:15 ` [PATCH v6 17/21] dma-buf: Move dma_buf_map_attachment() " Dmitry Osipenko
2022-09-28 19:15 ` [PATCH v6 18/21] dma-buf: Move dma_buf_mmap() " Dmitry Osipenko
2022-09-28 19:15 ` [PATCH v6 19/21] dma-buf: Document dynamic locking convention Dmitry Osipenko
2022-09-28 19:15 ` Dmitry Osipenko [this message]
2022-09-28 19:16 ` [PATCH v6 21/21] dma-buf: Remove obsoleted internal lock Dmitry Osipenko
2022-10-11 17:31 ` [PATCH v6 00/21] Move all drivers to a common dma-buf locking convention Dmitry Osipenko
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