[PATCH 1/2 v2] drm/amdgpu: fix vm size and block size for Vega10 VMPT

[Junwei Zhang]

From: "Zhang, Jerry" <Jerry.Zhang at amd.com>

Signed-off-by: Junwei Zhang <Jerry.Zhang at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c |  8 --------
 drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c      | 15 ++++++++-------
 2 files changed, 8 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 363d73c..98555fd 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1041,14 +1041,6 @@ static bool amdgpu_check_pot_argument(int arg)
 
 static void amdgpu_get_block_size(struct amdgpu_device *adev)
 {
-	/* from AI, asic starts to support multiple level VMPT */
-	if (adev->asic_type >= CHIP_VEGA10) {
-		if (amdgpu_vm_block_size != 9)
-			dev_warn(adev->dev,
-				 "Multi-VMPT limits block size to one page!\n");
-		amdgpu_vm_block_size = 9;
-		return;
-	}
 	/* defines number of bits in page table versus page directory,
 	 * a page is 4KB so we have 12 bits offset, minimum 9 bits in the
 	 * page table and the remaining bits are in the page directory */
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
index df69aae..081a676 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -546,6 +546,14 @@ static int gmc_v9_0_sw_init(void *handle)
 	} else {
 		/* XXX Don't know how to get VRAM type yet. */
 		adev->mc.vram_type = AMDGPU_VRAM_TYPE_HBM;
+
+		/*
+		 * To fulfill 4-level page support,
+		 * vm size is 256TB (48bit), maximum size of Vega10,
+		 * block size 512 (9bit)
+		 */
+		amdgpu_vm_size = 1U << 18;
+		amdgpu_vm_block_size = 9;
 	}
 
 	/* This interrupt is VMC page fault.*/
@@ -557,13 +565,6 @@ static int gmc_v9_0_sw_init(void *handle)
 	if (r)
 		return r;
 
-	/* Because of four level VMPTs, vm size is at least 512GB.
-	 * The maximum size is 256TB (48bit).
-	 */
-	if (amdgpu_vm_size < 512) {
-		DRM_WARN("VM size is at least 512GB!\n");
-		amdgpu_vm_size = 512;
-	}
 	adev->vm_manager.max_pfn = (uint64_t)amdgpu_vm_size << 18;
 
 	/* Set the internal MC address mask
-- 
1.9.1