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drm/amdgpu: Reuse fw_vram_usage_* for dynamic critical region in SRIOV

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- During guest driver init, asa VFs receive PF msg to
	init dynamic critical region(v2), VFs reuse fw_vram_usage_*
	 from ttm to store critical region tables in a 5MB chunk.

Signed-off-by: Ellen Pan <yunru.pan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Ellen Pan
2025-10-08 15:01:10 -05:00
committed by Alex Deucher
parent 07009df649
commit 13ccaa8443
3 changed files with 30 additions and 18 deletions
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9
drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
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@@ -1008,6 +1008,15 @@ int amdgpu_virt_init_critical_region(struct amdgpu_device *adev)
init_data_hdr->bad_page_size_in_kb;
}
/* reserved memory starts from crit region base offset with the size of 5MB */
adev->mman.fw_vram_usage_start_offset = adev->virt.crit_regn.offset;
adev->mman.fw_vram_usage_size = adev->virt.crit_regn.size_kb << 10;
dev_info(adev->dev,
"critical region v%d requested to reserve memory start at %08llx with %llu KB.\n",
init_data_hdr->version,
adev->mman.fw_vram_usage_start_offset,
adev->mman.fw_vram_usage_size >> 10);
adev->virt.is_dynamic_crit_regn_enabled = true;
out: