kernel/linux.git/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c, branch v6.19.11

drm/amdgpu: Use correct address to setup gart page table for vram access

2026-01-14T19:57:34+00:00

Use dst input parameter to setup gart page table entries instead of using fixed location. Fixes: 237d623ae659 ("drm/amdgpu/gart: Add helper to bind VRAM pages (v2)") Signed-off-by: Xiaogang Chen Reviewed-by: Alex Deucher Signed-off-by: Alex Deucher (cherry picked from commit ca5d4db8db843be7ed35fc9334737490c2b58d32)

drm/amdgpu/gart: Add helper to bind VRAM pages (v2)

2025-11-12T02:54:17+00:00

Binds pages that located in VRAM to the GART page table. Useful when a kernel BO is located in VRAM but needs to be accessed from the GART address space, for example to give a kernel BO a 32-bit address when GART is placed in LOW address space. v2: - Refactor function to be more reusable Signed-off-by: Timur Kristóf Reviewed-by: Christian König Signed-off-by: Alex Deucher

drm/amd: Fix set but not used warnings

2025-10-20T22:25:58+00:00

There are many set but not used warnings under drivers/gpu/drm/amd when compiling with the latest upstream mainline GCC: drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c:305:18: warning: variable ‘p’ set but not used [-Wunused-but-set-variable=] drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.h:103:26: warning: variable ‘internal_reg_offset’ set but not used [-Wunused-but-set-variable=] ... drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.h:164:26: warning: variable ‘internal_reg_offset’ set but not used [-Wunused-but-set-variable=] ... drivers/gpu/drm/amd/amdgpu/../display/dc/dc_dmub_srv.c:445:13: warning: variable ‘pipe_idx’ set but not used [-Wunused-but-set-variable=] drivers/gpu/drm/amd/amdgpu/../display/dc/dc_dmub_srv.c:875:21: warning: variable ‘pipe_idx’ set but not used [-Wunused-but-set-variable=] Remove the variables actually not used or add __maybe_unused attribute for the variables actually used to fix them, compile tested only. Signed-off-by: Tiezhu Yang Signed-off-by: Alex Deucher

drm/amdgpu: Fix dummy_read_page overlapping mappings

2024-11-04T17:05:30+00:00

Use the dma_map_page_attrs() with DMA_ATTR_SKIP_CPU_SYNC attribute setting to handle the dummy page overlapping mappings. Signed-off-by: Prike Liang Suggested-by: Christian König Reviewed-by: Christian König Signed-off-by: Alex Deucher

drm/amdgpu: add lock in amdgpu_gart_invalidate_tlb

2024-06-14T20:15:59+00:00

We need to take the reset domain lock before flush hdp. We can't put the lock inside amdgpu_device_flush_hdp itself because it is used during reset where we already take the write side lock. Signed-off-by: Yunxiang Li Reviewed-by: Christian König Signed-off-by: Alex Deucher

drm/amdgpu: use helper in amdgpu_gart_unbind

2024-06-14T20:15:59+00:00

When amdgpu_gart_invalidate_tlb helper is introduced this part was left out of the conversion. Avoid the code duplication here. Signed-off-by: Yunxiang Li Reviewed-by: Christian König Signed-off-by: Alex Deucher

drm/amd/amdgpu: Assign GART pages to AMD device mapping

2024-01-25T20:47:36+00:00

This allows kernel mapped pages like the PDB and PTB to be read via the iomem debugfs when there is no vram in the system. Signed-off-by: Tom St Denis Reviewed-by: Christian König Signed-off-by: Alex Deucher Cc: stable@vger.kernel.org # 6.7.x

drm/amdgpu: use %pad format string for dma_addr_t

2023-06-09T14:50:55+00:00

DMA addresses can be shorter than u64, which results in a broken debug output: drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c: In function 'amdgpu_gart_table_ram_alloc': drivers/gpu/drm/amd/amdgpu/amdgpu.h:41:22: error: format '%llx' expects argument of type 'long long unsigned int', but argument 4 has type 'dma_addr_t' {aka 'unsigned int'} [-Werror=format=] drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c:146:9: note: in expansion of macro 'dev_info' 146 | dev_info(adev->dev, "%s dma_addr:%llx\n", __func__, dma_addr); Use the special %pad format string and pass the DMA address by reference. Fixes: c9a502e981a9 ("drm/amdgpu: Allocate GART table in RAM for AMD APU") Signed-off-by: Arnd Bergmann Signed-off-by: Alex Deucher

drm/amdgpu: Allocate GART table in RAM for AMD APU

2023-06-09T13:51:06+00:00

Some AMD APUs may not have a dedicated VRAM. On such platforms the GART table should be allocated on the system memory. When real vram size is zero, place the GART table in system memory and create an SG BO to make it GPU accessible. v2: fix includes Reviewed-by: Felix Kuehling (rajneesh: removed set_memory_wc workaround) Signed-off-by: Rajneesh Bhardwaj Signed-off-by: Harish Kasiviswanathan Signed-off-by: Felix Kuehling Signed-off-by: Alex Deucher

drm/amdgpu: add bitmask to iterate vmhubs

2023-06-09T13:40:17+00:00

As the layout of VMHUB definition has been changed to cover multiple XCD/AID case, the original num_vmhubs is not appropriate to do vmhub iteration any more. Drop num_vmhubs and introduce vmhubs_mask instead. v2: switch to the new VMHUB layout v3: use DECLARE_BITMAP to define vmhubs_mask Signed-off-by: Le Ma Reviewed-by: Christian König Reviewed-by: Hawking Zhang Signed-off-by: Alex Deucher