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| author | Hawking Zhang <Hawking.Zhang@amd.com> | 2026-01-17 15:25:36 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2026-03-17 17:32:34 +0300 |
| commit | 20fe5d020fe5a68d640828af7a42a1ee1a030db6 (patch) | |
| tree | 446ea13e9d85f606a89f4d8e20ac88a3c5391ffb | |
| parent | 5aff5c6831da26425255461c7a227d6e165fde02 (diff) | |
| download | linux-20fe5d020fe5a68d640828af7a42a1ee1a030db6.tar.xz | |
drm/amdgpu: Implement get_xgmi_info callback for mmhub_v4_2
Query memory region assignment and address via mmhub
Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Le Ma <le.ma@amd.com>
Reviewed-by: Feifei Xu <Feifei.Xu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_mmhub.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/mmhub_v4_2_0.c | 40 |
2 files changed, 41 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mmhub.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_mmhub.h index 1ca9d4ed8063..92918101a95d 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mmhub.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mmhub.h @@ -63,6 +63,7 @@ struct amdgpu_mmhub_funcs { uint64_t page_table_base); void (*update_power_gating)(struct amdgpu_device *adev, bool enable); + int (*get_xgmi_info)(struct amdgpu_device *adev); }; struct amdgpu_mmhub { diff --git a/drivers/gpu/drm/amd/amdgpu/mmhub_v4_2_0.c b/drivers/gpu/drm/amd/amdgpu/mmhub_v4_2_0.c index 60bba87e42a0..b025c1fdc52c 100644 --- a/drivers/gpu/drm/amd/amdgpu/mmhub_v4_2_0.c +++ b/drivers/gpu/drm/amd/amdgpu/mmhub_v4_2_0.c @@ -72,6 +72,45 @@ static const char *mmhub_client_ids_v4_2_0[][2] = { [23][1] = "VCN1", }; +static int mmhub_v4_2_0_get_xgmi_info(struct amdgpu_device *adev) +{ + u32 max_num_physical_nodes; + u32 max_physical_node_id; + u32 xgmi_lfb_cntl; + u32 max_region; + u64 seg_size; + + /* limit this callback to A + A configuration only */ + if (!adev->gmc.xgmi.connected_to_cpu) + return 0; + + xgmi_lfb_cntl = RREG32_SOC15(MMHUB, GET_INST(MMHUB, 0), + regMMMC_VM_XGMI_LFB_CNTL); + seg_size = REG_GET_FIELD( + RREG32_SOC15(MMHUB, GET_INST(MMHUB, 0), regMMMC_VM_XGMI_LFB_SIZE), + MMMC_VM_XGMI_LFB_SIZE, PF_LFB_SIZE) << 24; + max_region = + REG_GET_FIELD(xgmi_lfb_cntl, MMMC_VM_XGMI_LFB_CNTL, PF_MAX_REGION); + + max_num_physical_nodes = 4; + max_physical_node_id = 3; + + adev->gmc.xgmi.num_physical_nodes = max_region + 1; + + if (adev->gmc.xgmi.num_physical_nodes > max_num_physical_nodes) + return -EINVAL; + + adev->gmc.xgmi.physical_node_id = + REG_GET_FIELD(xgmi_lfb_cntl, MMMC_VM_XGMI_LFB_CNTL, PF_LFB_REGION); + + if (adev->gmc.xgmi.physical_node_id > max_physical_node_id) + return -EINVAL; + + adev->gmc.xgmi.node_segment_size = seg_size; + + return 0; +} + static u64 mmhub_v4_2_0_get_fb_location(struct amdgpu_device *adev) { u64 base; @@ -884,6 +923,7 @@ const struct amdgpu_mmhub_funcs mmhub_v4_2_0_funcs = { .set_fault_enable_default = mmhub_v4_2_0_set_fault_enable_default, .set_clockgating = mmhub_v4_2_0_set_clockgating, .get_clockgating = mmhub_v4_2_0_get_clockgating, + .get_xgmi_info = mmhub_v4_2_0_get_xgmi_info, }; static int mmhub_v4_2_0_xcp_resume(void *handle, uint32_t inst_mask) |