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commit 4ba2abe154ef68f9612eee9d6fbfe53a1736b064 upstream.
For paired jobs, have the fragment job take a reference on the
geometry job, so that the geometry job cannot be freed until
the fragment job has finished with it.
The geometry job structure is accessed when the fragment job is being
prepared by the GPU scheduler. Taking the reference prevents the
geometry job being freed until the fragment job no longer requires it.
Fixes a use after free bug detected by KASAN:
[ 124.256386] BUG: KASAN: slab-use-after-free in pvr_queue_prepare_job+0x108/0x868 [powervr]
[ 124.264893] Read of size 1 at addr ffff0000084cb960 by task kworker/u16:4/63
Cc: stable@vger.kernel.org
Fixes: eaf01ee5ba28 ("drm/imagination: Implement job submission and scheduling")
Signed-off-by: Brendan King <brendan.king@imgtec.com>
Reviewed-by: Matt Coster <matt.coster@imgtec.com>
Link: https://lore.kernel.org/r/20250318-ddkopsrc-1337-use-after-free-in-pvr_queue_prepare_job-v1-1-80fb30d044a6@imgtec.com
Signed-off-by: Matt Coster <matt.coster@imgtec.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 68c3de7f707e8a70e0a6d8087cf0fe4a3d5dbfb0 upstream.
Ensure job done fences are only initialised once.
This fixes a memory manager not clean warning from drm_mm_takedown
on module unload.
Cc: stable@vger.kernel.org
Fixes: eaf01ee5ba28 ("drm/imagination: Implement job submission and scheduling")
Signed-off-by: Brendan King <brendan.king@imgtec.com>
Reviewed-by: Matt Coster <matt.coster@imgtec.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250226-init-done-fences-once-v2-1-c1b2f556b329@imgtec.com
Signed-off-by: Matt Coster <matt.coster@imgtec.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit df1a1ed5e1bdd9cc13148e0e5549f5ebcf76cf13 upstream.
Do scheduler queue fence release processing on a workqueue, rather
than in the release function itself.
Fixes deadlock issues such as the following:
[ 607.400437] ============================================
[ 607.405755] WARNING: possible recursive locking detected
[ 607.415500] --------------------------------------------
[ 607.420817] weston:zfq0/24149 is trying to acquire lock:
[ 607.426131] ffff000017d041a0 (reservation_ww_class_mutex){+.+.}-{3:3}, at: pvr_gem_object_vunmap+0x40/0xc0 [powervr]
[ 607.436728]
but task is already holding lock:
[ 607.442554] ffff000017d105a0 (reservation_ww_class_mutex){+.+.}-{3:3}, at: dma_buf_ioctl+0x250/0x554
[ 607.451727]
other info that might help us debug this:
[ 607.458245] Possible unsafe locking scenario:
[ 607.464155] CPU0
[ 607.466601] ----
[ 607.469044] lock(reservation_ww_class_mutex);
[ 607.473584] lock(reservation_ww_class_mutex);
[ 607.478114]
*** DEADLOCK ***
Cc: stable@vger.kernel.org
Fixes: eaf01ee5ba28 ("drm/imagination: Implement job submission and scheduling")
Signed-off-by: Brendan King <brendan.king@imgtec.com>
Reviewed-by: Matt Coster <matt.coster@imgtec.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250226-fence-release-deadlock-v2-1-6fed2fc1fe88@imgtec.com
Signed-off-by: Matt Coster <matt.coster@imgtec.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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This was basically just another one of amdgpus hacks. The parameter
allowed to restart the scheduler without turning fence signaling on
again.
That this is absolutely not a good idea should be obvious by now since
the fences will then just sit there and never signal.
While at it cleanup the code a bit.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240722083816.99685-1-christian.koenig@amd.com
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Fix compilation issues with DRM scheduler priority rename MIN to LOW.
Signed-off-by: Luben Tuikov <ltuikov89@gmail.com>
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202311252109.WgbJsSkG-lkp@intel.com/
Cc: Danilo Krummrich <dakr@redhat.com>
Cc: Frank Binns <frank.binns@imgtec.com>
Cc: Donald Robson <donald.robson@imgtec.com>
Cc: Matt Coster <matt.coster@imgtec.com>
Cc: Direct Rendering Infrastructure - Development <dri-devel@lists.freedesktop.org>
Fixes: fe375c74806dbd ("drm/sched: Rename priority MIN to LOW")
Fixes: 38f922a563aac3 ("drm/sched: Reverse run-queue priority enumeration")
Fixes: 5f03a507b29e44 ("drm/nouveau: implement 1:1 scheduler - entity relationship")
Link: https://patchwork.freedesktop.org/patch/msgid/20231125192246.87268-2-ltuikov89@gmail.com
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://lore.kernel.org/r/7429262c-6dea-4dcc-bf7e-54d2277dabf1@amd.com
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Implement job submission ioctl. Job scheduling is implemented using
drm_sched.
Jobs are submitted in a stream format. This is intended to allow the UAPI
data format to be independent of the actual FWIF structures in use, which
vary depending on the GPU in use.
The stream formats are documented at:
https://gitlab.freedesktop.org/mesa/mesa/-/blob/f8d2b42ae65c2f16f36a43e0ae39d288431e4263/src/imagination/csbgen/rogue_kmd_stream.xml
Changes since v8:
- Updated for upstreamed DRM scheduler changes
- Removed workaround code for the pending_list previously being updated
after run_job() returned
- Fixed null deref in pvr_queue_cleanup_fw_context() for bad stream ptr
given to create_context ioctl
- Corrected license identifiers
Changes since v7:
- Updated for v8 "DRM scheduler changes for XE" patchset
Changes since v6:
- Fix fence handling in pvr_sync_signal_array_add()
- Add handling for SUBMIT_JOB_FRAG_CMD_DISABLE_PIXELMERGE flag
- Fix missing dma_resv locking in job submit path
Changes since v5:
- Fix leak in job creation error path
Changes since v4:
- Use a regular workqueue for job scheduling
Changes since v3:
- Support partial render jobs
- Add job timeout handler
- Split sync handling out of job code
- Use drm_dev_{enter,exit}
Changes since v2:
- Use drm_sched for job scheduling
Co-developed-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Co-developed-by: Donald Robson <donald.robson@imgtec.com>
Signed-off-by: Donald Robson <donald.robson@imgtec.com>
Signed-off-by: Sarah Walker <sarah.walker@imgtec.com>
Link: https://lore.kernel.org/r/c98dab7a5f5fb891fbed7e4990d19b5d13964365.1700668843.git.donald.robson@imgtec.com
Signed-off-by: Maxime Ripard <mripard@kernel.org>
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