kernel/linux.git/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c, branch v6.6.131

drm/amdgpu: Allow P2P access through XGMI

2025-06-04T12:41:53+00:00

[ Upstream commit a92741e72f91b904c1d8c3d409ed8dbe9c1f2b26 ] If peer memory is accessible through XGMI, allow leaving it in VRAM rather than forcing its migration to GTT on DMABuf attachment. Signed-off-by: Felix Kuehling Tested-by: Hao (Claire) Zhou Reviewed-by: Christian König Signed-off-by: Alex Deucher (cherry picked from commit 372c8d72c3680fdea3fbb2d6b089f76b4a6d596a) Signed-off-by: Sasha Levin

drm/amdgpu/dma_buf: fix page_link check

2025-04-25T08:45:53+00:00

commit c0dd8a9253fadfb8e5357217d085f1989da4ef0a upstream. The page_link lower bits of the first sg could contain something like SG_END, if we are mapping a single VRAM page or contiguous blob which fits into one sg entry. Rather pull out the struct page, and use that in our check to know if we mapped struct pages vs VRAM. Fixes: f44ffd677fb3 ("drm/amdgpu: add support for exporting VRAM using DMA-buf v3") Signed-off-by: Matthew Auld Cc: Christian König Cc: amd-gfx@lists.freedesktop.org Cc: # v5.8+ Reviewed-by: Christian König Signed-off-by: Alex Deucher Signed-off-by: Greg Kroah-Hartman

drm/amdgpu: Reserve fences for VM update

2023-10-19T22:56:57+00:00

In amdgpu_dma_buf_move_notify reserve fences for the page table updates in amdgpu_vm_clear_freed and amdgpu_vm_handle_moved. This fixes a BUG_ON in dma_resv_add_fence when using SDMA for page table updates. Signed-off-by: Felix Kuehling Reviewed-by: Christian König Signed-off-by: Alex Deucher

drm/amdgpu: Add memory partition mem_id to amdgpu_bo

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

Add mem_id_plus1 parameter to amdgpu_gem_object_create and pass it to amdgpu_bo_create. For dGPU mode allocation, mem_id is used by VRAM manager to get the memory partition fpfn, lpfn from xcp manager. For APU native mode allocation, mem_id is used to get NUMA node id from xcp manager, then pass to TTM as numa pool id to alloc memory from the specific NUMA node. mem_id -1 means for entire VRAM or any NUMA nodes. Signed-off-by: Philip Yang Reviewed-by: Felix Kuehling Signed-off-by: Alex Deucher

drm/amd/amdgpu: Fix errors & warnings in amdgpu _bios, _cs, _dma_buf, _fence.c

2023-06-09T13:29:51+00:00

The following checkpatch errors & warning is removed. ERROR: else should follow close brace '}' ERROR: trailing statements should be on next line WARNING: Prefer 'unsigned int' to bare use of 'unsigned' WARNING: Possible repeated word: 'Fences' WARNING: Missing a blank line after declarations WARNING: braces {} are not necessary for single statement blocks WARNING: Comparisons should place the constant on the right side of the test WARNING: printk() should include KERN_ facility level Cc: Christian König Cc: Alex Deucher Signed-off-by: Srinivasan Shanmugam Reviewed-by: Christian König Signed-off-by: Alex Deucher

drm/ttm: merge ttm_bo_api.h and ttm_bo_driver.h v2

2022-12-06T11:54:14+00:00

Merge and cleanup the two headers into a single description of the object API. Also move all the documentation to the implementation and drop unnecessary includes from the header. No functional change. v2: minimal checkpatch.pl cleanup Signed-off-by: Christian König Reviewed-by: Arunpravin Paneer Selvam Link: https://patchwork.freedesktop.org/patch/msgid/20221125102137.1801-4-christian.koenig@amd.com

drm/amdgpu: Set MTYPE in PTE based on BO flags

2022-11-09T22:41:42+00:00

The same BO may need different MTYPEs and SNOOP flags in PTEs depending on its current location relative to the mapping GPU. Setting MTYPEs from clients ahead of time is not practical for coherent memory sharing. Instead determine the correct MTYPE for the desired coherence model and current BO location when updating the page tables. To maintain backwards compatibility with MTYPE-selection in AMDGPU_VA_OP_MAP, the coherence-model-based MTYPE selection is only applied if it chooses an MTYPE other than MTYPE_NC (the default). Add two AMDGPU_GEM_CREATE_... flags to indicate the coherence model. The default if no flag is specified is non-coherent (i.e. coarse-grained coherent at dispatch boundaries). Update amdgpu_amdkfd_gpuvm.c to use this new method to choose the correct MTYPE depending on the current memory location. v2: * check that bo is not NULL (e.g. PRT mappings) * Fix missing ~ bitmask in gmc_v11_0.c v3: * squash in "drm/amdgpu: Inherit coherence flags on dmabuf import" Suggested-by: Christian König Signed-off-by: Felix Kuehling Acked-by: Christian König Signed-off-by: Alex Deucher

drm/amdgpu: Use simplified API for p2p dist calc

2022-09-29T13:41:42+00:00

Use the simpified API that calculates distance between two devices. Signed-off-by: Lijo Lazar Reviewed-by: Christian König Reviewed-by: Guchun Chen Signed-off-by: Alex Deucher

drm/amdgpu: Disable verbose for p2p dist calc

2022-09-29T13:41:42+00:00

Disable verbose while getting p2p distance. With verbose, it shows warning if ACS redirect is set between the devices. Adds noise to dmesg logs when a few GPU devices are on the same platform. Example log: amdgpu 0000:34:00.0: ACS redirect is set between the client and provider (0000:31:00.0) amdgpu 0000:34:00.0: to disable ACS redirect for this path, add the kernel parameter: pci=disable_acs_redir=0000:30:00.0;0000:2e:00.0;0000:33:00.0;0000:2e:10.0 Signed-off-by: Lijo Lazar Reviewed-by: Christian König Reviewed-by: Guchun Chen Signed-off-by: Alex Deucher

dma-buf: wait for map to complete for static attachments

2022-04-07T10:53:54+00:00

We have previously done that in the individual drivers but it is more defensive to move that into the common code. Dynamic attachments should wait for map operations to complete by themselves. Signed-off-by: Christian König Reviewed-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20220407085946.744568-12-christian.koenig@amd.com