linux/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c, branch v6.16

drm/amdgpu: Disallow partition query during reset

2025-04-30T22:03:02Z

Reject queries to get current partition modes during reset. Also, don't accept sysfs interface requests to switch compute partition mode while in reset. Signed-off-by: Lijo Lazar Reviewed-by: Hawking Zhang Reviewed-by: Asad Kamal Signed-off-by: Alex Deucher

drm/amdgpu: Increase KIQ invalidate_tlbs timeout

2025-04-07T19:18:30Z

KIQ invalidate_tlbs request has been seen to marginally exceed the configured 100 ms timeout on systems under load. All other KIQ requests in the driver use a 10 second timeout. Use a similar timeout implementation on the invalidate_tlbs path. v2: Poll once before msleep v3: Fix return value Signed-off-by: Jay Cornwall Cc: Kent Russell Reviewed-by: Harish Kasiviswanathan Signed-off-by: Alex Deucher

drm/amdgpu: Optimize VM invalidation engine allocation and synchronize GPU TLB flush

2025-03-21T16:16:35Z

- Modify the VM invalidation engine allocation logic to handle SDMA page rings. SDMA page rings now share the VM invalidation engine with SDMA gfx rings instead of allocating a separate engine. This change ensures efficient resource management and avoids the issue of insufficient VM invalidation engines. - Add synchronization for GPU TLB flush operations in gmc_v9_0.c. Use spin_lock and spin_unlock to ensure thread safety and prevent race conditions during TLB flush operations. This improves the stability and reliability of the driver, especially in multi-threaded environments. v2: replace the sdma ring check with a function `amdgpu_sdma_is_page_queue` to check if a ring is an SDMA page queue.(Lijo) v3: Add GC version check, only enabled on GC9.4.3/9.4.4/9.5.0 v4: Fix code style and add more detailed description (Christian) v5: Remove dependency on vm_inv_eng loop order, explicitly lookup shared inv_eng(Christian/Lijo) v6: Added search shared ring function amdgpu_sdma_get_shared_ring (Lijo) Suggested-by: Lijo Lazar Signed-off-by: Jesse Zhang Reviewed-by: Lijo Lazar Signed-off-by: Alex Deucher

drm/amdgpu: fix spelling typos

2025-03-05T15:37:13Z

Found some typos while exploring amdgpu code. Signed-off-by: Alexandre Demers 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: Set noretry default for GC 9.5.0

2025-02-13T02:02:56Z

Set GC 9.5.0 noretry default as 1 for better performance. It can be changed by the administrator using amdgpu.noretry=0 or by the user using HSA_XNACK=1 environment variable. Signed-off-by: Amber Lin Reviewed-by: Harish Kasiviswanathan Signed-off-by: Alex Deucher

drm/amdgpu: add support for GC IP version 11.5.3

2025-02-13T02:02:55Z

This initializes GC IP version 11.5.3. Signed-off-by: Tim Huang Reviewed-by: Yifan Zhang Signed-off-by: Alex Deucher

drm/amdgpu: Fix off by one in current_memory_partition_show()

2024-10-15T15:26:35Z

The >= ARRAY_SIZE() should be > ARRAY_SIZE() to prevent an out of bounds read. Fixes: 012be6f22c01 ("drm/amdgpu: Add sysfs interfaces for NPS mode") Reviewed-by: Lijo Lazar Signed-off-by: Dan Carpenter Signed-off-by: Alex Deucher

drm/amdgpu: Fetch NPS mode for GCv9.4.3 VFs

2024-10-15T15:19:46Z

Use the memory ranges published in discovery table to deduce NPS mode of GC v9.4.3 VFs. Signed-off-by: Lijo Lazar Reviewed-by: Vignesh Chander Tested-by: Vignesh Chander Signed-off-by: Alex Deucher

drm/amdgpu: Check gmc requirement for reset on init

2024-10-15T15:16:32Z

Add a callback to check if there is any condition detected by GMC block for reset on init. One case is if a pending NPS change request is detected. If reset is done because of NPS switch, refresh NPS info from discovery table. Signed-off-by: Lijo Lazar Reviewed-by: Feifei Xu Signed-off-by: Alex Deucher