Hi,
On 10/14/22 11:46, Christian König wrote:
> +/* Remove the entity from the scheduler and kill all pending jobs */
> +static void drm_sched_entity_kill(struct drm_sched_entity *entity)
> +{
> + struct drm_sched_job *job;
> + struct dma_fence *prev;
> +
> + if (!entity->rq)
> +
gt; +
> static struct sg_table *get_sg_table(struct device *dev, struct dma_buf *buf,
>enum dma_data_direction direction)
> {
> @@ -162,6 +188,8 @@ static const struct dma_buf_ops udmabuf_ops = {
> .unmap_dma_buf = unmap_udmabuf,
> .release = release_udmabuf,
> .mmap = mmap_udmabuf,
> + .vmap = vmap_udmabuf,
> + .vunmap= vunmap_udmabuf,
> .begin_cpu_access = begin_cpu_udmabuf,
> .end_cpu_access= end_cpu_udmabuf,
> };
Reviewed-by: Dmitry Osipenko
--
Best regards,
Dmitry
Hello Steve,
On 11/14/22 19:54, Steven Price wrote:
> On 05/11/2022 23:27, Dmitry Osipenko wrote:
>> Replace Panfrost's custom memory shrinker with a common drm-shmem
>> memory shrinker.
>>
>> Signed-off-by: Dmitry Osipenko
>
> Sadly this triggers GPU f
On 11/14/22 02:38, Dmitry Osipenko wrote:
> Recently DRM framebuffer core and all drivers were moved to unlocked
> vmapping functions that take the reservation lock. The drm_gem_vram_vmap()
> was missed out by accident and now deadlocks drivers that use drm_gem_vram
> helpers when fr
drm_gem_vram_v[un]map() functions to fix the deadlock.
Reported-by: Dmitry Vyukov
Fixes: 79e2cf2e7a19 ("drm/gem: Take reservation lock for vmap/vunmap
operations")
Signed-off-by: Dmitry Osipenko
---
drivers/gpu/drm/drm_gem_vram_helper.c | 18 +++---
1 file changed, 3
On 11/13/22 23:48, Dmitry Vyukov wrote:
>> Hi,
>>
>> I am getting the following deadlock on reservation_ww_class_mutex
>> while trying to boot next-2022 kernel:
> The code is recently added by this commit:
>
> commit 79e2cf2e7a193473dfb0da3b9b869682b43dc60f
On 11/13/22 18:05, Lukasz Wiecaszek wrote:
> +static int vmap_udmabuf(struct dma_buf *buf, struct iosys_map *map)
> +{
> + struct udmabuf *ubuf = buf->priv;
> +
> + if (!ubuf->vaddr) {
> + ubuf->vaddr = vm_map_ram(ubuf->pages, ubuf->pagecount, -1);
> + if (!ubuf->vad
On 11/13/22 18:05, Lukasz Wiecaszek wrote:
> The reason behind that patch is associated with videobuf2 subsystem
> (or more genrally with v4l2 framework) and user created
> dma buffers (udmabuf). In some circumstances
> when dealing with V4L2_MEMORY_DMABUF buffers videobuf2 subsystem
> wants to use
On 11/10/22 23:13, Dmitry Osipenko wrote:
> Hello,
>
> Recently, dma-buf got a common locking convention for importers and
> exporters. All the dma-buf functions were moved to the new locking
> convention, apart from the dma_buf_mmap_internal() that was missed out
> by accident.
obj(objs, &bo->base.base);
>
> ret = virtio_gpu_array_lock_resv(objs);
> @@ -239,6 +239,8 @@ int virtio_gpu_object_create(struct virtio_gpu_device
> *vgdev,
>
> err_put_objs:
> virtio_gpu_array_put_free(objs);
> +err_free_entry:
> + kvfree(ent
On 11/11/22 15:05, Christian König wrote:
> Adding Dmitry as well.
>
> Am 11.11.22 um 12:45 schrieb Lukasz Wiecaszek:
>> The reason behind that patch is associated with videobuf2 subsystem
>> (or more genrally with v4l2 framework) and user created
>> dma buffers (udmabuf). In some circumstances
>>
All dma-buf functions has been moved to dynamic locking specification
The dma_buf_mmap_internal() was missed out by accident. Take reservation
lock around file mapping operation to adhere the common locking convention.
Reported-by: Daniel Vetter
Signed-off-by: Dmitry Osipenko
---
drivers/dma
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/me
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
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/fas
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
---
drive
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/udm
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;
>
>
nfrost: 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_
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
the locking.
>>
>> 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
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 +--
dr
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
memory 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/virti
: 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
ntion. 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 Osi
g/dri-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
dr
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
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 fu
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,
ether 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:
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 con
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 part
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
NULL 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 change
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!
Dmi
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 d
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 va
video: 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 p
backlight 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/
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
ation 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
---
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")
> git://an
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.
>>> From
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
&g
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-
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 a
ed-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
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
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 +++
in
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
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 to the V4L patches that he gave to v1.
Dmitry Osipenko (21
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
&g
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 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 a
.
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
ed-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
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
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 +++
in
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
llbacks are invoked 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 a
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 devi
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