[PATCH] drm/amd/amdgpu: Only reserve vram for firmware with vega10 Hyper-V host.

[Yongqiang Sun]

driver loading failed on VEGA10 SRIOV VF with linux host due to a wide
range of stolen reserved vram.
Since VEGA10 SRIOV VF need to reserve vram for firmware with windows
Hyper_V host specifically, check high part of FB address
to only reserve memory for it, and the range of the reserved vram
can be limited to between 5M-7M area.

Signed-off-by: Yongqiang Sun <yongqiang.sun at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c | 9 +++++----
 drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h | 3 +++
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
index a66a0881a934..324b43c1bc4c 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
@@ -647,11 +647,12 @@ void amdgpu_gmc_get_vbios_allocations(struct amdgpu_device *adev)
 	case CHIP_VEGA10:
 		adev->mman.keep_stolen_vga_memory = true;
 		/*
-		 * VEGA10 SRIOV VF needs some firmware reserved area.
+		 * VEGA10 SRIOV VF with hyper-v host needs some firmware reserved area.
 		 */
-		if (amdgpu_sriov_vf(adev)) {
-			adev->mman.stolen_reserved_offset = 0x100000;
-			adev->mman.stolen_reserved_size = 0x600000;
+		if (amdgpu_sriov_vf(adev) &&
+		    (adev->gmc.vram_start & AMDGPU_GMC_HYPERV_FB_BASE_MASK)) {
+			adev->mman.stolen_reserved_offset = 0x500000;
+			adev->mman.stolen_reserved_size = 0x200000;
 		}
 		break;
 	case CHIP_RAVEN:
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h
index 032b0313f277..906ec15e8dac 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h
@@ -61,6 +61,9 @@
  */
 #define AMDGPU_GMC_FAULT_TIMEOUT	5000ULL
 
+/* High part (33 - 47bit) FB address for VEGA10 HYPERV Host*/
+#define AMDGPU_GMC_HYPERV_FB_BASE_MASK 0xF400000000ULL
+
 struct firmware;
 
 /*
-- 
2.25.1