When userspace mmaps dma-buf's fd, the dma-buf reservation lock must be
held. Add locking sanity checks to the dma-buf mmaping callbacks to ensure
that the locking assumptions won't regress in the future.
Suggested-by: Daniel Vetter
Signed-off-by: Dmitry Osipenko
---
drivers/dma-buf/heaps
When userspace mmaps dma-buf's fd, the dma-buf reservation lock must be
held. Add locking sanity check to the dma-buf mmaping callback to ensure
that the locking assumption won't regress in the future.
Suggested-by: Daniel Vetter
Signed-off-by: Dmitry Osipenko
---
drivers/misc/fastrpc.c | 3
When userspace mmaps dma-buf's fd, the dma-buf reservation lock must be
held. Add locking sanity checks to the dma-buf mmaping callbacks of DRM
drivers to ensure that the locking assumptions won't regress in future.
Suggested-by: Daniel Vetter
Signed-off-by: Dmitry Osipenko
---
drivers/gpu/drm
When userspace mmaps dma-buf's fd, the dma-buf reservation lock must be
held. Add locking sanity check to the dma-buf mmaping callback to ensure
that the locking assumption won't regress in the future.
Suggested-by: Daniel Vetter
Signed-off-by: Dmitry Osipenko
---
drivers/dma-buf/udmabuf.c | 3
specification and updates drivers that support mmaping of
dma-bufs to use the debug-assert of the lock.
Thanks to Daniel Vetter for spotting the missed function!
Dmitry Osipenko (6):
dma-buf: Move dma_buf_mmap_internal() to dynamic locking specification
drm: Assert held reservation lock for dma-buf
Hello Thomas,
On 11/9/22 13:28, Thomas Zimmermann wrote:
>> +int drm_gem_shmem_set_evictable(struct drm_gem_shmem_object *shmem)
>> +{
>> + dma_resv_lock(shmem->base.resv, NULL);
>> +
>> + if (shmem->madv < 0) {
>> + dma_resv_unlock(shmem->base.resv);
>> + return -ENOMEM;
>
>
t: Update io-pgtable API")
> Reported-by: Dmitry Osipenko
> Signed-off-by: Robin Murphy
> ---
> The previous diff turned out to be not quite right, so I've not
> included Dmitry's Tested-by given for that.
> ---
> drivers/gpu/drm/panfrost/panfrost_mmu.c | 11
On 11/7/22 19:50, Robin Murphy wrote:
> On 2022-11-04 20:48, Dmitry Osipenko wrote:
>> On 11/4/22 23:37, Robin Murphy wrote:
>>> On 2022-11-04 20:11, Dmitry Osipenko wrote:
>>>> On 8/23/22 01:01, Robin Murphy wrote:
>>>>> Convert to io-pgtable's b
g.
>>
>> Acked-by: Sumit Semwal
>> Acked-by: Christian König
>> Signed-off-by: Dmitry Osipenko
> Just noticed this while reading code ... this patch seems to have
> missed dma_buf_mmap_internal()?
>
> Might be good if at least some drivers gain a dma_resv_asse
Replace Panfrost's custom memory shrinker with a common drm-shmem
memory shrinker.
Signed-off-by: Dmitry Osipenko
---
drivers/gpu/drm/panfrost/Makefile | 1 -
drivers/gpu/drm/panfrost/panfrost_device.h| 4 -
drivers/gpu/drm/panfrost/panfrost_drv.c | 19 +--
drivers
Add unlocked variants of drm_gem_un/pin() functions. These new helpers
will take care of GEM dma-reservation locking for DRM drivers.
VirtIO-GPU driver will use these helpers to pin shmem framebuffers,
preventing them from eviction during scanout.
Signed-off-by: Dmitry Osipenko
---
drivers/gpu
y if
guest supports SWAP file or partition.
Signed-off-by: Daniel Almeida
Signed-off-by: Dmitry Osipenko
---
drivers/gpu/drm/virtio/virtgpu_drv.h| 18 +++-
drivers/gpu/drm/virtio/virtgpu_gem.c| 55 ++
drivers/gpu/drm/virtio/virtgpu_ioctl.c | 37 +++
drivers/gpu/drm/virtio/vir
-by: Daniel Vetter
Signed-off-by: Dmitry Osipenko
---
drivers/gpu/drm/drm_gem_shmem_helper.c| 184 +++---
drivers/gpu/drm/lima/lima_gem.c | 8 +-
drivers/gpu/drm/panfrost/panfrost_drv.c | 7 +-
.../gpu/drm/panfrost/panfrost_gem_shrinker.c | 6 +-
drivers
drm_gem_shmem_shrinker_register(drm_device)
3. Use drm_gem_shmem_set_purgeable(shmem) and alike API functions to
activate shrinking of shmem GEMs
Signed-off-by: Daniel Almeida
Signed-off-by: Dmitry Osipenko
---
drivers/gpu/drm/drm_gem_shmem_helper.c| 493 --
.../gpu/drm
DMA-buf core has its own refcounting of vmaps, use it instead of drm-shmem
counting. This change prepares drm-shmem for addition of memory shrinker
support where drm-shmem will use a single dma-buf reservation lock for
all operations performed over dma-bufs.
Signed-off-by: Dmitry Osipenko
. If
there are no remaining pages left to shrink, then there is no need to
free up more pages and shrinker may break out from the loop.
This problem was uncovered during shrinker/madvise IOCTL testing of
virtio-gpu driver. The MSM driver is affected in the same way.
Signed-off-by: Dmitry Osipenko
-devel/20220526235040.678984-1-dmitry.osipe...@collabora.com/
Dmitry Osipenko (7):
drm/msm/gem: Prevent blocking within shrinker loop
drm/shmem-helper: Don't use vmap_use_count for dma-bufs
drm/shmem-helper: Switch to reservation lock
drm/shmem-helper: Add memory shrinker
drm/gem: Add
On 11/4/22 23:37, Robin Murphy wrote:
> On 2022-11-04 20:11, Dmitry Osipenko wrote:
>> On 8/23/22 01:01, Robin Murphy wrote:
>>> Convert to io-pgtable's bulk {map,unmap}_pages() APIs, to help the old
>>> single-page interfaces eventually go away. Unmapping heap BOs
On 8/23/22 01:01, Robin Murphy wrote:
> Convert to io-pgtable's bulk {map,unmap}_pages() APIs, to help the old
> single-page interfaces eventually go away. Unmapping heap BOs still
> wants to be done a page at a time, but everything else can get the full
> benefit of the more efficient interface.
On 11/2/22 12:15, Christian König wrote:
> Am 30.10.22 um 16:44 schrieb Dmitry Osipenko:
>> The drm_gem_vunmap() will crash with a NULL dereference if the passed
>> object pointer is NULL. It wasn't a problem before we added the locking
>> support to drm_gem_vunmap functio
d-by: Dan Carpenter
Reviewed-by: Christian König
Link: https://lore.kernel.org/dri-devel/Y1fLfsccW3AS%2Fo+%2F@kili/
Fixes: 809d9c72c2f8 ("dma-buf: Move dma_buf_attach() to dynamic locking
specification")
Signed-off-by: Dmitry Osipenko
---
drivers/dma-buf/dma-buf.c | 4 ++--
1 file changed,
GEM is NULL before trying to unmap the GEM, it will happen on
framebuffer creation error.
Reported-by: Dan Carpenter
Link: https://lore.kernel.org/dri-devel/Y1kFEGxT8MVlf32V@kili/
Fixes: 79e2cf2e7a19 ("drm/gem: Take reservation lock for vmap/vunmap
operations")
Signed-off-by: Dmitr
the dma-buf/attachment pointer check.
- Dropped v1 patch that added GEM NULL-checking to
drm_gem_vunmap_unlocked() and replaced it with the NULL-checking
in drm_client_buffer_delete(), like was suggested by Christian König.
Dmitry Osipenko (2):
dma-buf: Make locking
On 10/27/22 09:13, Christian König wrote:
> Am 27.10.22 um 00:46 schrieb Dmitry Osipenko:
>> The dma_buf_detach() locks attach->dmabuf->resv and then unlocks
>> dmabuf->resv, which could be a two different locks from a static
>> code checker perspective. In p
d-by: Dan Carpenter
Link: https://lore.kernel.org/dri-devel/Y1fLfsccW3AS%2Fo+%2F@kili/
Fixes: 809d9c72c2f8 ("dma-buf: Move dma_buf_attach() to dynamic locking
specification")
Signed-off-by: Dmitry Osipenko
---
drivers/dma-buf/dma-buf.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion
pointers better.
Reported-by: Dan Carpenter
Link: https://lore.kernel.org/dri-devel/Y1kFEGxT8MVlf32V@kili/
Fixes: 79e2cf2e7a19 ("drm/gem: Take reservation lock for vmap/vunmap
operations")
Signed-off-by: Dmitry Osipenko
---
drivers/gpu/drm/drm_gem.c | 9 ++---
1 file changed, 6
Hello,
Here are the two patches fixing minor problems introduced by my
"dma-buf locking convention" series. Thanks to Dan Carpenter who
checked linux-next with Smatch and reported the found issues!
Please review/ack, I'll apply the patches to misc-next afterwards.
Thanks!
Dmitry O
DEV_ERROR(hdmi->dev, "Unable to parse OF data\n");
> + if (ret != -EPROBE_DEFER)
> + DRM_DEV_ERROR(hdmi->dev, "Unable to parse OF data\n");
> return ret;
> }
>
Reviewed-by: Dmitry Osipenko
Nit: all th
On 10/26/22 12:59, Dan Carpenter wrote:
> Hello Noralf Trønnes,
>
> The patch b39b5394fabc: "drm/gem: Add drm_gem_object_funcs" from Nov
> 10, 2018, leads to the following Smatch static checker warning:
>
> drivers/gpu/drm/drm_client.c:240 drm_client_buffer_delete()
> warn: variable
On 10/25/22 14:41, Dan Carpenter wrote:
> Hello Dmitry Osipenko,
>
> The patch 809d9c72c2f8: "dma-buf: Move dma_buf_attach() to dynamic
> locking specification" from Oct 17, 2022, leads to the following
> Smatch static checker warning:
>
>
On 10/21/22 00:33, Dmitry Osipenko wrote:
> The drm_client_buffer_delete() wasn't switched to unlocked GEM vunmapping
> by accident when rest of drm_client code transitioned to the unlocked
> variants of the vmapping functions. Make drm_client_buffer_delete() use
> the unlocked variant
: Add acpi_video_backlight_use_native()
helper")
Signed-off-by: Dmitry Osipenko
---
Changelog:
v2: - Added explanatory comment to the code and added check for the
native backlight presence, like was requested by Hans de Goede.
drivers/acpi/video_detect.c | 12
1 file changed, 12 insertions(+)
On 10/24/22 16:46, Hans de Goede wrote:
> Hi,
>
> On 10/24/22 15:32, Dmitry Osipenko wrote:
>> Chromebooks don't have backlight in ACPI table, they suppose to use
>> native backlight in this case. Check presence of the CrOS embedded
>> controller ACPI device and prefer
when another backlight
should be used (v2)")
Signed-off-by: Dmitry Osipenko
---
drivers/acpi/video_detect.c | 8
1 file changed, 8 insertions(+)
diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
index 0d9064a9804c..8ed5021de6fb 100644
--- a/drivers/acpi/video_dete
Hello,
On 10/21/22 00:33, Dmitry Osipenko wrote:
> The drm_client_buffer_delete() wasn't switched to unlocked GEM vunmapping
> by accident when rest of drm_client code transitioned to the unlocked
> variants of the vmapping functions. Make drm_client_buffer_delete() use
> the unlo
lock when framebuffer is released.
Reported-by: kernel test robot
Link:
https://lore.kernel.org/dri-devel/890f70db-68b0-8456-ca3c-c5496ef90...@collabora.com/T/
Fixes: 79e2cf2e7a19 ("drm/gem: Take reservation lock for vmap/vunmap
operations")
Signed-off-by: Dmitry Osipenko
---
drive
On 10/20/22 06:38, Dmitry Osipenko wrote:
> On 10/20/22 06:23, kernel test robot wrote:
>> Greeting,
>>
>> FYI, we noticed WARNING:at_drivers/gpu/drm/drm_gem.c:#drm_gem_vunmap due to
>> commit (built with clang-14):
>>
>> commit: 79e2cf2e7a193473d
On 10/20/22 06:23, kernel test robot wrote:
> Greeting,
>
> FYI, we noticed WARNING:at_drivers/gpu/drm/drm_gem.c:#drm_gem_vunmap due to
> commit (built with clang-14):
>
> commit: 79e2cf2e7a193473dfb0da3b9b869682b43dc60f ("drm/gem: Take reservation
> lock for vmap/vunmap operations")
>
On 10/18/22 14:34, Christian König wrote:
> Am 18.10.22 um 01:07 schrieb Dmitry Osipenko:
>> On 10/17/22 20:22, Dmitry Osipenko wrote:
>>> Hello,
>>>
>>> This series moves all drivers to a dynamic dma-buf locking
>>> specification.
>>>
On 10/17/22 20:22, Dmitry Osipenko wrote:
> Hello,
>
> This series moves all drivers to a dynamic dma-buf locking specification.
> From now on all dma-buf importers are made responsible for holding
> dma-buf's reservation lock around all operations performed over dma-bufs
Move dma_buf_mmap() function to the dynamic locking specification by
taking the reservation lock. Neither of the today's drivers take the
reservation lock within the mmap() callback, hence it's safe to enforce
the locking.
Acked-by: Sumit Semwal
Acked-by: Christian König
Signed-off-by: Dmitry
Move dma_buf_vmap/vunmap() functions to the dynamic locking
specification by asserting that the reservation lock is held.
Acked-by: Sumit Semwal
Acked-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/dma-buf/dma-buf.c | 4
1 file changed, 4 insertions(+)
diff --git
-by: Christian König
Reviewed-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/dma-buf/dma-buf.c | 14 --
include/linux/dma-buf.h | 9 -
2 files changed, 4 insertions(+), 19 deletions(-)
diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c
index
Move dma-buf attachment mapping functions to the dynamic locking
specification by asserting that the reservation lock is held.
Acked-by: Sumit Semwal
Reviewed-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/dma-buf/dma-buf.c | 10 ++
1 file changed, 2 insertions(+), 8
-by: Dmitry Osipenko
---
drivers/dma-buf/dma-buf.c | 20
1 file changed, 8 insertions(+), 12 deletions(-)
diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c
index 2c4381bb9478..d685a5adb122 100644
--- a/drivers/dma-buf/dma-buf.c
+++ b/drivers/dma-buf/dma-buf.c
Add documentation for the dynamic locking convention. The documentation
tells dma-buf API users when they should take the reservation lock and
when not.
Acked-by: Sumit Semwal
Reviewed-by: Christian König
Signed-off-by: Dmitry Osipenko
---
Documentation/driver-api/dma-buf.rst | 6
.
Acked-by: Tomasz Figa
Acked-by: Hans Verkuil
Acked-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/media/common/videobuf2/videobuf2-dma-contig.c | 11 +--
drivers/media/common/videobuf2/videobuf2-dma-sg.c | 11 +--
drivers/media/common/videobuf2/videobuf2
Prepare V4L2 memory allocators to the common dynamic dma-buf locking
convention by starting to use the unlocked versions of dma-buf API
functions.
Acked-by: Tomasz Figa
Acked-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/media/common/videobuf2/videobuf2-dma-contig.c | 11
Prepare fastrpc to the common dynamic dma-buf locking convention by
starting to use the unlocked versions of dma-buf API functions.
Acked-by: Christian König
Acked-by: Srinivas Kandagatla
Signed-off-by: Dmitry Osipenko
---
drivers/misc/fastrpc.c | 6 +++---
1 file changed, 3 insertions(+), 3
Prepare InfiniBand drivers to the common dynamic dma-buf locking
convention by starting to use the unlocked versions of dma-buf API
functions.
Acked-by: Jason Gunthorpe
Acked-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/infiniband/core/umem_dmabuf.c | 7 ---
1 file
Prepare Tegra video decoder driver to the common dynamic dma-buf
locking convention by starting to use the unlocked versions of dma-buf
API functions.
Acked-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/media/platform/nvidia/tegra-vde/dmabuf-cache.c | 6 +++---
1 file changed
Prepare Tegra DRM driver to the common dynamic dma-buf locking convention
by starting to use the unlocked versions of dma-buf API functions.
Acked-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/gpu/drm/tegra/gem.c | 17 +
1 file changed, 9 insertions(+), 8
Prepare Etnaviv driver to the common dynamic dma-buf locking convention
by starting to use the unlocked versions of dma-buf API functions.
Acked-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion
Prepare OMAP DRM driver to the common dynamic dma-buf locking convention
by starting to use the unlocked versions of dma-buf API functions.
Acked-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c | 4 ++--
1 file changed, 2 insertions(+), 2
Prepare gntdev driver to the common dynamic dma-buf locking convention
by starting to use the unlocked versions of dma-buf API functions.
Acked-by: Juergen Gross
Acked-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/xen/gntdev-dmabuf.c | 8
1 file changed, 4 insertions
Prepare i915 driver to the common dynamic dma-buf locking convention
by starting to use the unlocked versions of dma-buf API functions
and handling cases where importer now holds the reservation lock.
Acked-by: Christian König
Reviewed-by: Michael J. Ruhl
Signed-off-by: Dmitry Osipenko
Prepare Armada driver to the common dynamic dma-buf locking convention
by starting to use the unlocked versions of dma-buf API functions.
Acked-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/gpu/drm/armada/armada_gem.c | 8
1 file changed, 4 insertions(+), 4 deletions
Prepare DRM prime core to the common dynamic dma-buf locking convention
by starting to use the unlocked versions of dma-buf API functions.
Reviewed-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/gpu/drm/drm_prime.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions
.
This patch prepares DRM core and drivers to the common dynamic dma-buf
locking convention.
Acked-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/gpu/drm/drm_client.c | 4 ++--
drivers/gpu/drm/drm_gem.c| 24
drivers/gpu/drm
Add unlocked variant of dma_buf_vmap/vunmap() that will be utilized
by drivers that don't take the reservation lock explicitly.
Acked-by: Sumit Semwal
Acked-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/dma-buf/dma-buf.c | 43 +++
include
Add unlocked variant of dma_buf_map/unmap_attachment() that will
be used by drivers that don't take the reservation lock explicitly.
Acked-by: Sumit Semwal
Acked-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/dma-buf/dma-buf.c | 53
quot;locking convention" documentation that explains which dma-buf
functions and callbacks are locked/unlocked for importers and exporters,
which was requested by Christian König.
- Added ack from Tomasz Figa to the V4L patches that he gave to v1.
Dmitry Osipenko (21):
dma-buf: Add
On 9/28/22 22:15, Dmitry Osipenko wrote:
> Hello,
>
> This series moves all drivers to a dynamic dma-buf locking specification.
> From now on all dma-buf importers are made responsible for holding
> dma-buf's reservation lock around all operations performed over dma-bufs
On 9/28/22 22:15, Dmitry Osipenko wrote:
> Prepare InfiniBand drivers to the common dynamic dma-buf locking
> convention by starting to use the unlocked versions of dma-buf API
> functions.
>
> Acked-by: Christian König
> Signed-off-by: Dmitry Osipenko
> ---
>
Prepare fastrpc to the common dynamic dma-buf locking convention by
starting to use the unlocked versions of dma-buf API functions.
Acked-by: Christian König
Acked-by: Srinivas Kandagatla
Signed-off-by: Dmitry Osipenko
---
drivers/misc/fastrpc.c | 6 +++---
1 file changed, 3 insertions(+), 3
Prepare InfiniBand drivers to the common dynamic dma-buf locking
convention by starting to use the unlocked versions of dma-buf API
functions.
Acked-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/infiniband/core/umem_dmabuf.c | 7 ---
1 file changed, 4 insertions(+), 3
Prepare Tegra DRM driver to the common dynamic dma-buf locking convention
by starting to use the unlocked versions of dma-buf API functions.
Acked-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/gpu/drm/tegra/gem.c | 17 +
1 file changed, 9 insertions(+), 8
Move dma_buf_mmap() function to the dynamic locking specification by
taking the reservation lock. Neither of the today's drivers take the
reservation lock within the mmap() callback, hence it's safe to enforce
the locking.
Acked-by: Sumit Semwal
Acked-by: Christian König
Signed-off-by: Dmitry
-by: Dmitry Osipenko
---
drivers/dma-buf/dma-buf.c | 20
1 file changed, 8 insertions(+), 12 deletions(-)
diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c
index 23656f334735..d60585bbb529 100644
--- a/drivers/dma-buf/dma-buf.c
+++ b/drivers/dma-buf/dma-buf.c
Add documentation for the dynamic locking convention. The documentation
tells dma-buf API users when they should take the reservation lock and
when not.
Acked-by: Sumit Semwal
Reviewed-by: Christian König
Signed-off-by: Dmitry Osipenko
---
Documentation/driver-api/dma-buf.rst | 6
Prepare Tegra video decoder driver to the common dynamic dma-buf
locking convention by starting to use the unlocked versions of dma-buf
API functions.
Acked-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/media/platform/nvidia/tegra-vde/dmabuf-cache.c | 6 +++---
1 file changed
Move dma_buf_vmap/vunmap() functions to the dynamic locking
specification by asserting that the reservation lock is held.
Acked-by: Sumit Semwal
Acked-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/dma-buf/dma-buf.c | 4
1 file changed, 4 insertions(+)
diff --git
.
Acked-by: Tomasz Figa
Acked-by: Hans Verkuil
Acked-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/media/common/videobuf2/videobuf2-dma-contig.c | 11 +--
drivers/media/common/videobuf2/videobuf2-dma-sg.c | 11 +--
drivers/media/common/videobuf2/videobuf2
Move dma-buf attachment mapping functions to the dynamic locking
specification by asserting that the reservation lock is held.
Acked-by: Sumit Semwal
Reviewed-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/dma-buf/dma-buf.c | 10 ++
1 file changed, 2 insertions(+), 8
-by: Christian König
Reviewed-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/dma-buf/dma-buf.c | 14 --
include/linux/dma-buf.h | 9 -
2 files changed, 4 insertions(+), 19 deletions(-)
diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c
index
Prepare V4L2 memory allocators to the common dynamic dma-buf locking
convention by starting to use the unlocked versions of dma-buf API
functions.
Acked-by: Tomasz Figa
Acked-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/media/common/videobuf2/videobuf2-dma-contig.c | 11
Prepare Armada driver to the common dynamic dma-buf locking convention
by starting to use the unlocked versions of dma-buf API functions.
Acked-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/gpu/drm/armada/armada_gem.c | 8
1 file changed, 4 insertions(+), 4 deletions
Prepare gntdev driver to the common dynamic dma-buf locking convention
by starting to use the unlocked versions of dma-buf API functions.
Acked-by: Juergen Gross
Acked-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/xen/gntdev-dmabuf.c | 8
1 file changed, 4 insertions
Prepare Etnaviv driver to the common dynamic dma-buf locking convention
by starting to use the unlocked versions of dma-buf API functions.
Acked-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion
Prepare OMAP DRM driver to the common dynamic dma-buf locking convention
by starting to use the unlocked versions of dma-buf API functions.
Acked-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c | 4 ++--
1 file changed, 2 insertions(+), 2
.
This patch prepares DRM core and drivers to the common dynamic dma-buf
locking convention.
Acked-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/gpu/drm/drm_client.c | 4 ++--
drivers/gpu/drm/drm_gem.c| 24
drivers/gpu/drm
Prepare i915 driver to the common dynamic dma-buf locking convention
by starting to use the unlocked versions of dma-buf API functions
and handling cases where importer now holds the reservation lock.
Acked-by: Christian König
Reviewed-by: Michael J. Ruhl
Signed-off-by: Dmitry Osipenko
Add unlocked variant of dma_buf_vmap/vunmap() that will be utilized
by drivers that don't take the reservation lock explicitly.
Acked-by: Sumit Semwal
Acked-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/dma-buf/dma-buf.c | 41 +++
include
Prepare DRM prime core to the common dynamic dma-buf locking convention
by starting to use the unlocked versions of dma-buf API functions.
Reviewed-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/gpu/drm/drm_prime.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions
Add unlocked variant of dma_buf_map/unmap_attachment() that will
be used by drivers that don't take the reservation lock explicitly.
Acked-by: Sumit Semwal
Acked-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/dma-buf/dma-buf.c | 53
without the held lock and exporter should take the
lock.
- Added "locking convention" documentation that explains which dma-buf
functions and callbacks are locked/unlocked for importers and exporters,
which was requested by Christian König.
- Added ack from Tomasz Figa
25.08.2022 17:36, Hans de Goede пишет:
> Before this commit when we want userspace to use the acpi_video backlight
> device we register both the GPU's native backlight device and acpi_video's
> firmware acpi_video# backlight device. This relies on userspace preferring
> firmware type backlight
On 9/20/22 17:13, Sumit Semwal wrote:
> Hi Dmitry,
>
> Thanks very much for the series.
>
> On Wed, 14 Sept 2022 at 00:59, Dmitry Osipenko
> wrote:
>>
>> Move dma_buf_vmap/vunmap_unlocked() functions to the dynamic locking
>> specification by asserti
Hello Chun-Kuang,
18.09.2022 06:17, Chun-Kuang Hu пишет:
> Hi, Dmitry:
>
> My tree has no mtk-dp driver yet. Would you like to pick this series?
>
> Regards,
> Chun-Kuang.
>
> Bo-Chen Chen 於 2022年9月16日 週五 晚上9:38寫道：
>>
>> For this series, we do some clean-up and fix a build warning.
>> This
Hello Chun-Kuang,
18.09.2022 06:56, Chun-Kuang Hu пишет:
> Hi, Dmitry:
>
> My tree has no mtk dp driver yet. Would you like to pick this patch?
>
> Acked-by: Chun-Kuang Hu
>
> Dmitry Osipenko 於 2022年9月15日 週四 下午5:04寫道：
Applied to drm-misc-next
@@ -2642,7 +2642,7 @@ static const struct of_device_id mtk_dp_of_match[] = {
> };
> MODULE_DEVICE_TABLE(of, mtk_dp_of_match);
>
> -struct platform_driver mtk_dp_driver = {
> +static struct platform_driver mtk_dp_driver = {
> .probe = mtk_dp_probe,
> .remove =
.
Acked-by: Tomasz Figa
Acked-by: Hans Verkuil
Acked-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/media/common/videobuf2/videobuf2-dma-contig.c | 11 +--
drivers/media/common/videobuf2/videobuf2-dma-sg.c | 11 +--
drivers/media/common/videobuf2/videobuf2
Prepare V4L2 memory allocators to the common dynamic dma-buf locking
convention by starting to use the unlocked versions of dma-buf API
functions.
Acked-by: Tomasz Figa
Acked-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/media/common/videobuf2/videobuf2-dma-contig.c | 11
-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/dma-buf/dma-buf.c | 14 --
include/linux/dma-buf.h | 9 -
2 files changed, 4 insertions(+), 19 deletions(-)
diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c
index c359bdbdf5be..45462b988aec
Move dma_buf_mmap() function to the dynamic locking specification by
taking the reservation lock. Neither of the today's drivers take the
reservation lock within the mmap() callback, hence it's safe to enforce
the locking.
Acked-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers
Move dma_buf_vmap/vunmap_unlocked() functions to the dynamic locking
specification by asserting that the reservation lock is held.
Acked-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/dma-buf/dma-buf.c | 4
1 file changed, 4 insertions(+)
diff --git a/drivers/dma-buf/dma
Add documentation for the dynamic locking convention. The documentation
tells dma-buf API users when they should take the reservation lock and
when not.
Reviewed-by: Christian König
Signed-off-by: Dmitry Osipenko
---
Documentation/driver-api/dma-buf.rst | 6 +++
drivers/dma-buf/dma-buf.c
Prepare Tegra video decoder driver to the common dynamic dma-buf
locking convention by starting to use the unlocked versions of dma-buf
API functions.
Acked-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/media/platform/nvidia/tegra-vde/dmabuf-cache.c | 6 +++---
1 file changed
Move dma-buf attachment API functions to the dynamic locking specification
by taking the reservation lock around the mapping operations. The strict
locking convention prevents deadlock situations for dma-buf importers and
exporters.
Reviewed-by: Christian König
Signed-off-by: Dmitry Osipenko
Prepare gntdev driver to the common dynamic dma-buf locking convention
by starting to use the unlocked versions of dma-buf API functions.
Acked-by: Juergen Gross
Acked-by: Christian König
Signed-off-by: Dmitry Osipenko
---
drivers/xen/gntdev-dmabuf.c | 8
1 file changed, 4 insertions
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