linux/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h, branch v6.15

drm/amd/amdgpu: Increase max rings to enable SDMA page ring

2025-03-21T16:16:35Z

Increase the maximum number of rings supported by the AMDGPU driver from 133 to 149. This change is necessary to enable support for the SDMA page ring. Signed-off-by: Jesse Zhang Reviewed-by: Lijo Lazar Signed-off-by: Alex Deucher

drm/amdgpu: increase AMDGPU_MAX_RINGS

2025-02-25T16:45:13Z

Increase it since a cper ring is introduced. Signed-off-by: Tao Zhou Reviewed-by: Hawking Zhang Signed-off-by: Alex Deucher

drm/amdgpu: Introduce cached_rptr and is_guilty callback in amdgpu_ring

2025-02-25T16:43:59Z

This patch introduces the following changes: - Add `cached_rptr` to the `amdgpu_ring` structure to store the read pointer before a reset. - Add `is_guilty` callback to the `amdgpu_ring_funcs` structure to check if a ring is guilty of causing a timeout. Suggested-by: Alex Deucher Signed-off-by: Jesse Zhang Reviewed-by: Alex Deucher Signed-off-by: Alex Deucher

drm/amdgpu: add RAS CPER ring buffer

2025-02-17T19:09:29Z

And initialize it, this is a pure software ring to store RAS CPER data. v2: change ring size to 0x100000 v2: update the initialization of count_dw of cper ring, it's dword variable v3: skip VM inv eng for cper v3: init/fini when aca enabled Signed-off-by: Tao Zhou Signed-off-by: Xiang Liu Reviewed-by: Hawking Zhang Signed-off-by: Alex Deucher

drm/amdgpu: increase amdgpu max rings limit

2025-02-13T02:02:54Z

increase max rings to 132 to support all JPEG5_0_1 cores, else ring_init fails due to ring count exceeding maximum limit. Signed-off-by: Sathishkumar S Reviewed-by: Leo Liu Signed-off-by: Alex Deucher

drm/amdgpu: drop the amdgpu_device argument from amdgpu_ib_free

2024-12-18T17:17:32Z

It's unused. Signed-off-by: Pierre-Eric Pelloux-Prayer Reviewed-by: Alex Deucher Reviewed-by: Christian König Signed-off-by: Alex Deucher

drm/amdgpu: drop volatile from ring buffer

2024-10-28T20:32:03Z

Volatile only prevents the compiler from re-ordering reads and writes. Since we always only modify the ring buffer from one CPU thread and have an explicit barrier before signaling the HW this should have no effect at all and just prevents compiler optimisations. While at it drop the local variables as well. Signed-off-by: Christian König Reviewed-by: Sunil Khatri Signed-off-by: Alex Deucher

drm/amdgpu: no need to log error in multi ring write

2024-10-08T13:46:23Z

No need to log error in multi ring write as its taken care during ring commit. This is inline with change done in amdgpu_ring_write. Signed-off-by: Sunil Khatri Suggested-by: Christian König Reviewed-by: Christian König Signed-off-by: Alex Deucher

drm/amdgpu: move error log from ring write to commit

2024-10-08T13:46:15Z

Move the error message from ring write as an optimization to avoid printing that message on every write instead print once during commit if it exceeds write the allocated size i.e ring->count_dw. Also we do not want to log the error message in between a ring write and complete the write as its mostly not harmful as it will overwrite stale data only as GPU read from ring is faster than CPU write to ring. This reduces the size of amdgpu.ko module by around 600 Kb as write is very often used function and hence the print. Signed-off-by: Sunil Khatri Suggested-by: Christian König Reviewed-by: Christian König Signed-off-by: Alex Deucher

drm/amdgpu: Emit cleaner shader at end of IB submission

2024-08-16T18:27:42Z

This commit introduces the emission of a cleaner shader at the end of the IB submission process. This is achieved by adding a new function pointer, `emit_cleaner_shader`, to the `amdgpu_ring_funcs` structure. If the `emit_cleaner_shader` function is set in the ring functions, it is called during the VM flush process. The cleaner shader is only emitted if the `enable_cleaner_shader` flag is set in the `amdgpu_device` structure. This allows the cleaner shader emission to be controlled on a per-device basis. By emitting a cleaner shader at the end of the IB submission, we can ensure that the VM state is properly cleaned up after each submission. Cc: Christian König Cc: Alex Deucher Signed-off-by: Alex Deucher Signed-off-by: Srinivasan Shanmugam Suggested-by: Christian König