From: Alex Deucher <alexander.deucher@xxxxxxx>
On hives with xgmi enabled, the fb_location aperture is a size
which defines the total framebuffer size of all nodes in the
hive. Each GPU in the hive has the same view via the fb_location
aperture. GPU0 starts at offset (0 * segment size),
GPU1 starts at offset (1 * segment size), etc.
For access to local vram on each GPU, we need to take this offset into
account. This including on setting up GPUVM page table and GART table
Change-Id: I9efd510bed68fdb9afdfbdc76e1046792471ee78
Acked-by: Huang Rui <ray.huang at amd.com>
Acked-by: Slava Abramov <slava.abramov at amd.com>
Signed-off-by: Shaoyun Liu <Shaoyun.Liu at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling at amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c | 20 ++++++++++----------
drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h | 7 +++++++
drivers/gpu/drm/amd/amdgpu/gfxhub_v1_1.c | 3 +++
drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 6 ++++++
drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c | 7 +++++++
5 files changed, 33 insertions(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
index 6acdeeb..cf97c1c 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
@@ -147,8 +147,8 @@ void amdgpu_gmc_gart_location(struct amdgpu_device *adev, struct amdgpu_gmc *mc)
/* VCE doesn't like it when BOs cross a 4GB segment, so align
* the GART base on a 4GB boundary as well.
*/
- size_bf = mc->vram_start;
- size_af = adev->gmc.mc_mask + 1 - ALIGN(mc->vram_end + 1, four_gb);
+ size_bf = mc->fb_start;
+ size_af = adev->gmc.mc_mask + 1 - ALIGN(mc->fb_end + 1, four_gb);
if (mc->gart_size > max(size_bf, size_af)) {
dev_warn(adev->dev, "limiting GART\n");
@@ -184,23 +184,23 @@ void amdgpu_gmc_agp_location(struct amdgpu_device *adev, struct amdgpu_gmc *mc)
const uint64_t sixteen_gb_mask = ~(sixteen_gb - 1);
u64 size_af, size_bf;
- if (mc->vram_start > mc->gart_start) {
- size_bf = (mc->vram_start & sixteen_gb_mask) -
+ if (mc->fb_start > mc->gart_start) {
+ size_bf = (mc->fb_start & sixteen_gb_mask) -
ALIGN(mc->gart_end + 1, sixteen_gb);
- size_af = mc->mc_mask + 1 - ALIGN(mc->vram_end + 1, sixteen_gb);
+ size_af = mc->mc_mask + 1 - ALIGN(mc->fb_end + 1, sixteen_gb);
} else {
- size_bf = mc->vram_start & sixteen_gb_mask;
+ size_bf = mc->fb_start & sixteen_gb_mask;
size_af = (mc->gart_start & sixteen_gb_mask) -
- ALIGN(mc->vram_end + 1, sixteen_gb);
+ ALIGN(mc->fb_end + 1, sixteen_gb);
}
if (size_bf > size_af) {
- mc->agp_start = mc->vram_start > mc->gart_start ?
+ mc->agp_start = mc->fb_start > mc->gart_start ?
mc->gart_end + 1 : 0;
mc->agp_size = size_bf;
} else {
- mc->agp_start = (mc->vram_start > mc->gart_start ?
- mc->vram_end : mc->gart_end) + 1,
+ mc->agp_start = (mc->fb_start > mc->gart_start ?
+ mc->fb_end : mc->gart_end) + 1,
mc->agp_size = size_af;
}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h
index a929a55..df96dfe 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h
@@ -114,6 +114,13 @@ struct amdgpu_gmc {
u64 gart_end;
u64 vram_start;
u64 vram_end;
+ /* FB region , it's same as local vram region in single GPU, in XGMI
+ * configuration, this region covers all GPUs in the same hive ,
+ * each GPU in the hive has the same view of this FB region .
+ * GPU0's vram starts at offset (0 * segment size) ,
+ * GPU1 starts at offset (1 * segment size), etc. */
+ u64 fb_start;
+ u64 fb_end;
unsigned vram_width;
u64 real_vram_size;
int vram_mtrr;
diff --git a/drivers/gpu/drm/amd/amdgpu/gfxhub_v1_1.c b/drivers/gpu/drm/amd/amdgpu/gfxhub_v1_1.c
index d4170cb..5e9ab8e 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfxhub_v1_1.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfxhub_v1_1.c
@@ -44,6 +44,9 @@ int gfxhub_v1_1_get_xgmi_info(struct amdgpu_device *adev)
REG_GET_FIELD(xgmi_lfb_cntl, MC_VM_XGMI_LFB_CNTL, PF_LFB_REGION);
if (adev->gmc.xgmi.physical_node_id > 3)
return -EINVAL;
+ adev->gmc.xgmi.node_segment_size = REG_GET_FIELD(
+ RREG32_SOC15(GC, 0, mmMC_VM_XGMI_LFB_SIZE),
+ MC_VM_XGMI_LFB_SIZE, PF_LFB_SIZE) << 24;
}
return 0;
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
index e9b5a13..b1c8489 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -771,12 +771,18 @@ static void gmc_v9_0_vram_gtt_location(struct amdgpu_device *adev,
u64 base = 0;
if (!amdgpu_sriov_vf(adev))
base = mmhub_v1_0_get_fb_location(adev);
+ /* add the xgmi offset of the physical node */
+ base += adev->gmc.xgmi.physical_node_id * adev->gmc.xgmi.node_segment_size;
amdgpu_gmc_vram_location(adev, &adev->gmc, base);
amdgpu_gmc_gart_location(adev, mc);
if (!amdgpu_sriov_vf(adev))
amdgpu_gmc_agp_location(adev, mc);
/* base offset of vram pages */
adev->vm_manager.vram_base_offset = gfxhub_v1_0_get_mc_fb_offset(adev);
+
+ /* XXX: add the xgmi offset of the physical node? */
+ adev->vm_manager.vram_base_offset +=
+ adev->gmc.xgmi.physical_node_id * adev->gmc.xgmi.node_segment_size;
}
/**
diff --git a/drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c b/drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c
index 73d7c07..0e09549 100644
--- a/drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c
@@ -38,10 +38,17 @@
u64 mmhub_v1_0_get_fb_location(struct amdgpu_device *adev)
{
u64 base = RREG32_SOC15(MMHUB, 0, mmMC_VM_FB_LOCATION_BASE);
+ u64 top = RREG32_SOC15(MMHUB, 0, mmMC_VM_FB_LOCATION_TOP);
base &= MC_VM_FB_LOCATION_BASE__FB_BASE_MASK;
base <<= 24;
+ top &= MC_VM_FB_LOCATION_TOP__FB_TOP_MASK;
+ top <<= 24;
+
+ adev->gmc.fb_start = base;
+ adev->gmc.fb_end = top;
+
return base;
}
--
2.7.4
