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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: ev7X5/tb61tf7XdxPTjLd1+gS5H+jc7Q93AuTQw+fj8aQSp509xmrsTuLRujln+pRFTC0ViopSZPI7tb+XhhLEZiOH3QcRAnxoqTHzvv7leVdtEuYRXM5kp9DtpNlHuOgGo5FOLCPrphWqHsGYY8mnTP7Sb9hv7tO1hqEFQcQV4Z4XOWuUfjcfG493p3P4AQxNqGKGnN42z51h/O7+MjZd31JRGCX5OoZQrCSJ5JfrWjyqZpGrfvHtz15KJ9zsp5SWQHlhUckQjODXlUwcC2eXgBm1AGGdKKr+slnUWcsQv6If3S4U8SbaoM5mzFw9SVVLIRs4sP9uvqhDLWj2ShD+IR2qgO9Ob7luG95nXcnnlQje/vyyD7vdLMSYUvgD3vMwk1CsauVv0IyIAjyQIY88VNUQNbSODiM7EP43TCSvMSciZ5auHKchHVX06TvvL+ X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Sep 2026 20:46:28.3534 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 5fe78540-3985-49ca-afe3-08df18ea9372 X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[4.158.2.129];Helo=[outbound-uk1.az.dlp.m.darktrace.com] X-MS-Exchange-CrossTenant-AuthSource: CPH1EPF00000527.eurprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI3PR08MB984667 This series adds HW-assisted para-virtualization support for Mali v15 GPUs. v15 GPUs provide 16 register sets for job submission known as access windows (AWs). The GPU hardware itself is then time-sliced across each requesting access window. Patches 1-6 make panthor less dependent on fixed register layouts by caching decoded GPU_ID fields and moving register offsets into the HW description. Patches 7-9 update dt-bindings and add basic support for v15 GPUs. Patches 10-11 introduce the GPU-wide configuration driver. Patches 12-21 implement the time-slicing driver with a simple interrupt-driven round robin scheduler. Patches 22-27 update panthor to be time-slice aware as well as being resilient against the GPU being yielded at any time. v1: - Rebased on drm-misc-next. - Added device-tree bindings for the GPU and virtualization components. - Improved GPU identification and register handling. - Updated AM messaging to protocol v2. - Improved GPU scheduling and recovery from timeouts and failed commands. - Added access-window assignments through device tree and earlier GPU release when another window is waiting. - Improved power management, driver setup and cleanup. - Fixed races involving GPU resets, loss of access and late grants. - Kept frequency reporting available without devfreq and documented scheduler timeout settings. - Link to RFC: https://lore.kernel.org/all/20260528150546.3168527-1-karunika.choo@arm.com/ Kind regards, Karunika Choo Karunika Choo (27): drm/panthor: Ignore -EOPNOTSUPP for shader-present nvmem lookup drm/panthor: Move register access helpers out of panthor_device.h drm/panthor: Parse and store GPU_ID fields drm/panthor: Add 64-bit GPU_ID decoding for v15 GPUs drm/panthor: Move register base offsets to the HW description drm/panthor: Derive MMU AS register addresses from base and stride dt-bindings: gpu: mali-valhall-csf: Add Mali Gen5 AM compatible drm/panthor: Add Mali v15 hardware support drm/panthor: Skip devfreq when no OPP table is present dt-bindings: gpu: panthor: Document panthor-system bindings drm/panthor: Add AM_SYSTEM platform driver dt-bindings: gpu: panthor: Document panthor-arbitration bindings drm/panthor: Add AM_PARTITION_CONTROL support drm/panthor: Add AM message helpers drm/panthor: Add AM_RESOURCE_GROUP support drm/panthor: Add arbitration scheduler drm/panthor: Route arbitration events dt-bindings: gpu: panthor: Document AW assignment DT property drm/panthor: Add AW assignment tracking drm/panthor: Handle partition control INVALID_COMMAND interrupt drm/panthor: Request AW to yield GPU access on idle drm/panthor: Add access-window support drm/panthor: Synchronize HW component PM transitions drm/panthor: Route HW component PM through access windows drm/panthor: Tolerate access-window loss during HW waits drm/panthor: Prevent missed post-yield cleanup due to reset drm/panthor: Release GPU access immediately for out-of-band grants .../testing/sysfs-driver-panthor-arbitration | 18 + .../gpu/arm,mali-gen5-am-arbitration.yaml | 135 ++++ .../bindings/gpu/arm,mali-gen5-am-system.yaml | 76 ++ .../bindings/gpu/arm,mali-valhall-csf.yaml | 26 +- MAINTAINERS | 2 + drivers/gpu/drm/panthor/Kconfig | 20 + drivers/gpu/drm/panthor/Makefile | 3 + drivers/gpu/drm/panthor/arbitration/Makefile | 15 + .../panthor/arbitration/panthor_arbitration.h | 81 ++ .../arbitration/panthor_arbitration_drv.c | 451 +++++++++++ .../arbitration/panthor_arbitration_sched.c | 755 ++++++++++++++++++ .../arbitration/panthor_arbitration_sched.h | 46 ++ .../arbitration/panthor_partition_control.c | 428 ++++++++++ .../arbitration/panthor_partition_control.h | 29 + .../arbitration/panthor_resource_group.c | 323 ++++++++ .../arbitration/panthor_resource_group.h | 22 + drivers/gpu/drm/panthor/panthor_am_msg.h | 159 ++++ drivers/gpu/drm/panthor/panthor_aw.c | 628 +++++++++++++++ drivers/gpu/drm/panthor/panthor_aw.h | 53 ++ drivers/gpu/drm/panthor/panthor_devfreq.c | 31 +- drivers/gpu/drm/panthor/panthor_device.c | 82 +- drivers/gpu/drm/panthor/panthor_device.h | 131 ++- drivers/gpu/drm/panthor/panthor_device_io.h | 83 ++ drivers/gpu/drm/panthor/panthor_drv.c | 1 + drivers/gpu/drm/panthor/panthor_fw.c | 12 +- drivers/gpu/drm/panthor/panthor_fw_regs.h | 2 - drivers/gpu/drm/panthor/panthor_gpu.c | 13 +- .../drm/panthor/panthor_gpu_discover_regs.h | 44 + drivers/gpu/drm/panthor/panthor_gpu_regs.h | 3 +- drivers/gpu/drm/panthor/panthor_heap.c | 3 +- drivers/gpu/drm/panthor/panthor_hw.c | 193 ++++- drivers/gpu/drm/panthor/panthor_hw.h | 56 +- drivers/gpu/drm/panthor/panthor_mmu.c | 45 +- drivers/gpu/drm/panthor/panthor_mmu_regs.h | 23 +- drivers/gpu/drm/panthor/panthor_pwr.c | 29 +- drivers/gpu/drm/panthor/panthor_pwr_regs.h | 2 - drivers/gpu/drm/panthor/panthor_sched.c | 5 + drivers/gpu/drm/panthor/system/Makefile | 13 + .../drm/panthor/system/panthor_system_drv.c | 304 +++++++ include/uapi/drm/panthor_drm.h | 23 +- 40 files changed, 4193 insertions(+), 175 deletions(-) create mode 100644 Documentation/ABI/testing/sysfs-driver-panthor-arbitration create mode 100644 Documentation/devicetree/bindings/gpu/arm,mali-gen5-am-arbitration.yaml create mode 100644 Documentation/devicetree/bindings/gpu/arm,mali-gen5-am-system.yaml create mode 100644 drivers/gpu/drm/panthor/arbitration/Makefile create mode 100644 drivers/gpu/drm/panthor/arbitration/panthor_arbitration.h create mode 100644 drivers/gpu/drm/panthor/arbitration/panthor_arbitration_drv.c create mode 100644 drivers/gpu/drm/panthor/arbitration/panthor_arbitration_sched.c create mode 100644 drivers/gpu/drm/panthor/arbitration/panthor_arbitration_sched.h create mode 100644 drivers/gpu/drm/panthor/arbitration/panthor_partition_control.c create mode 100644 drivers/gpu/drm/panthor/arbitration/panthor_partition_control.h create mode 100644 drivers/gpu/drm/panthor/arbitration/panthor_resource_group.c create mode 100644 drivers/gpu/drm/panthor/arbitration/panthor_resource_group.h create mode 100644 drivers/gpu/drm/panthor/panthor_am_msg.h create mode 100644 drivers/gpu/drm/panthor/panthor_aw.c create mode 100644 drivers/gpu/drm/panthor/panthor_aw.h create mode 100644 drivers/gpu/drm/panthor/panthor_device_io.h create mode 100644 drivers/gpu/drm/panthor/panthor_gpu_discover_regs.h create mode 100644 drivers/gpu/drm/panthor/system/Makefile create mode 100644 drivers/gpu/drm/panthor/system/panthor_system_drv.c -- 2.43.0