kernel/linux.git/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.h, branch v6.18.22

drm/amdgpu: Remove volatile from CSB functions

2025-09-15T20:51:04+00:00

The CSB buffer manipulation occurs in memory where the BO is mapped during initialization, and some references to this buffer are handled with volatile, which is incorrect in this scenario. There are a few cases where the use of volatile is accepted, but none of them align with CSB operations. Therefore, this commit removes all the volatile variables associated with the CSB code. Reviewed-by: Christian König Signed-off-by: Rodrigo Siqueira Signed-off-by: Alex Deucher

drm/amdgpu: Add documentation associated with CSB

2025-04-30T22:05:41+00:00

Add a description for the get_csb_buffer callback, update the glossary, and add some extra information about RB, which is associated with CSB configuration. Signed-off-by: Rodrigo Siqueira Signed-off-by: Alex Deucher

drm/amdgpu/gfx: Introduce helpers handling CSB manipulation

2025-04-30T22:04:29+00:00

From GFX6 to GFX11, there is a function for getting the CSB buffer to be put into the hardware. Three common parts are duplicated in all of these GFX functions: 1. Prepare the CSB preamble. 2. Parser the CS data. 3. End the CSB preamble. This commit creates helpers to be used from GFX6 to GFX11. Signed-off-by: Rodrigo Siqueira Signed-off-by: Alex Deucher

drm/amdgpu: rename enforce isolation variables

2025-04-21T14:56:06+00:00

Since they will be used for both KFD and KGD user queues, rename them from kfd to userq. No intended functional change. Acked-by: Sunil Khatri Signed-off-by: Alex Deucher

drm/amdgpu/userq: rework driver parameter

2025-04-21T14:55:47+00:00

Replace disable_kq parameter with user_queue parameter. The parameter has the following logic: -1 = auto (ASIC specific default) 0 = user queues disabled 1 = user queues enabled and kernel queues enabled (if supported) 2 = user queues enabled and kernel queues disabled The default behavior (-1) is currently the same as 0 for current ASICs. To enable user queues (in addition to kernel queues) set user_queue=1. To enable user queues and disable kernel queues (to make all resources available to user queues), set user_queue=2. Reviewed-by: Sunil Khatri Signed-off-by: Alex Deucher

drm/amdgpu/gfx: add generic handling for disable_kq

2025-04-08T20:48:22+00:00

Add proper checks for disable_kq functionality in gfx helper functions. Add special logic for families that require the clear state setup. v2: use ring count as per Felix suggestion v3: fix num_gfx_rings handling in amdgpu_gfx_graphics_queue_acquire() v4: fix error code (Alex) Reviewed-by: Prike Liang Reviewed-by: Sunil Khatri Signed-off-by: Alex Deucher

drm/amdgpu: bypass SRIOV check for shadow size info

2025-04-08T20:48:17+00:00

Currently, the shadow FW space size and alignment information is protected under a flag (adev->gfx.cp_gfx_shadow) which gets set only in case of SRIOV setups. if (amdgpu_sriov_vf(adev)) adev->gfx.cp_gfx_shadow = true; But we need this information for GFX Userqueues, so that user can create these objects while creating userqueue. This patch series creates a method to get this information bypassing the dependency on this check. This patch: - adds a new input parameter flag to the gfx.funcs->get_gfx_shadow_info fptr definition, so that it can accommodate the information without the check (adev->gfx.cp_gfx_shadow) on request. - updates the existing definition of amdgpu_gfx_get_gfx_shadow_info to adjust with this new flag. Next patch in the series is adding a UAPI which will consume this info. V2: split this patch from the new UAPI patch Cc: Alex Deucher Cc: Christian Koenig Cc: Arvind Yadav Reviewed-by: Alex Deucher Signed-off-by: Shashank Sharma Signed-off-by: Alex Deucher

drm/amdgpu/gfx: make amdgpu_gfx_me_queue_to_bit() static

2025-04-07T19:18:34+00:00

It's not used outside of amdgpu_gfx.c. Reviewed-by: Sunil Khatri Signed-off-by: Alex Deucher

drm/amd/amdgpu: Revert "drm/amd/amdgpu: shorten the gfx idle worker timeout"

2025-03-21T16:15:08+00:00

This reverts commit 55ff973fe1c053de143969cfc8b34baff084084a. Reason for revert: this causes some tests fail with call trace. Signed-off-by: Kenneth Feng Acked-by: Yang Wang Signed-off-by: Alex Deucher

drm/amdgpu/gfx: fix ref counting for ring based profile handling

2025-03-19T19:52:56+00:00

We need to make sure the workload profile ref counts are balanced. This isn't currently the case because we can increment the count on submissions, but the decrement may be delayed as work comes in. Track when we enable the workload profile so the references are balanced. v2: switch to a mutex and active flag v3: fix mutex init Fixes: 8fdb3958e396 ("drm/amdgpu/gfx: add ring helpers for setting workload profile") Cc: Yang Wang Cc: Kenneth Feng Tested-by: Kenneth Feng Reviewed-by: Kenneth Feng Signed-off-by: Alex Deucher