> On 12 Sep 2026, at 07:39, Onur Özkan <[email protected]> wrote: > > Add support for scheduling GPU resets on a dedicated workqueue. Track > the reset state to avoid queueing another reset while one is already > pending or in progress. > > Use an SRCU based gate with mutex-protected reader admission to block > hardware accesses while reset work runs and wait for current users > before resetting. > > Stop new reset requests during teardown and drain any queued or running > reset work before releasing the device resources. > > This is the initial reset infrastructure only. It is not wired to a reset > source yet as those will follow in separate work. > > Based on 'commit 53441a9cae3c ("drm/tyr: program CSF global interface")' > from tyr-for-upstream with the following patch series on the ML: > - rust: add SRCU abstraction [1] > - rust: workqueue: add cancel_sync support [2] > > TODOs: > - On reset failure, we don't do anything for now. We should unplug > the GPU. > - In schedule(), similar to panthor_device_schedule_reset(), we should > have a PM check but similar to the note above, we don't have the > infrastructure for that yet. > > Changes since v6: > - Acquire the hardware gate once per address-space operation and pass > the guarded iomem reference to helpers to avoid deadlocks. > - Clone the gate Arc before acquiring a guard so mutating address-space > helpers can retain their &mut self receivers as suggested by Daniel. > > Link: https://lore.kernel.org/all/[email protected] > [1] > Link: https://lore.kernel.org/all/[email protected] [2] > Link: https://lore.kernel.org/all/[email protected] > Link: https://gitlab.freedesktop.org/panfrost/linux/-/issues/28 > Signed-off-by: Onur Özkan <[email protected]> > --- > Onur Özkan (3): > drm/tyr: clear stale IRQ state before soft reset > drm/tyr: add GPU reset infrastructure > drm/tyr: put iomem behind the hardware gate > > drivers/gpu/drm/tyr/driver.rs | 65 ++++----- > drivers/gpu/drm/tyr/fw.rs | 16 +- > drivers/gpu/drm/tyr/mmu.rs | 9 +- > drivers/gpu/drm/tyr/mmu/address_space.rs | 90 +++++++----- > drivers/gpu/drm/tyr/reset.rs | 242 +++++++++++++++++++++++++++++++ > drivers/gpu/drm/tyr/reset/hw_gate.rs | 106 ++++++++++++++ > drivers/gpu/drm/tyr/tyr.rs | 1 + > 7 files changed, 436 insertions(+), 93 deletions(-) > --- > base-commit: 53441a9cae3c4be552fa8aefa6e61b0f1bceb8a5 > change-id: 20260813-tyr-reset-impl-93e951f996b4 > prerequisite-message-id: <[email protected]> > prerequisite-patch-id: 4275f7d6e3cf96d61221d47f2398ebfb896db0c7 > prerequisite-patch-id: f5e24f7b3717f2ab0445b5395c7f12b554861d78 > prerequisite-patch-id: 0bf6ae4abcef7090d0e48921d6ec627a59dc6a7a > prerequisite-patch-id: 8dc24064e858240a6bb5411a261a987a7eae3fad > prerequisite-patch-id: eefbd4a72ed6da0083e20811882738cc3b05604f > prerequisite-patch-id: 7502236d334b13c547a8b47f0be9bf7171b5ca6b > prerequisite-message-id: <[email protected]> > prerequisite-patch-id: 9e1efee190d212ba1b01cd0acb5a4357e0b4da42 > prerequisite-patch-id: 26aba035f4d1e212fa6ea7078095febefff5c5ba > prerequisite-patch-id: ffa25d5aadec4c04589af2bdd59a9c022f0fc9b0 > prerequisite-patch-id: c2e05a4ac9d665d331952b291a622df6be673e41 > prerequisite-patch-id: c14a4bd8a68b045356d61f7fa94690bd037ad08b > > -- > Alice, if you are ok with this series, feel free to merge. At least from my side it looks ok. — Daniel
