drm/amdgpu: HW setup of 2-level vmid0 page table

Set up HW for 2-level vmid0 page table: 1. Set up
PAGE_TABLE_START/END registers. Currently only plan
to do 2-level page table for ALDEBARAN, so only gfxhub1.0
and mmhub1.7 is changed. 2. Set page table base register.
For 2-level page table, the page table base should point
to PDB0. 3. Disable AGP and FB aperture as they are not
used.
Signed-off-by: Oak Zeng <Oak.Zeng@amd.com>
Reviewed-by: Christian Konig <christian.koenig@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gfxhub_v1_0.c

@@ -53,19 +53,39 @@ static void gfxhub_v1_0_setup_vm_pt_regs(struct amdgpu_device *adev,
 
 static void gfxhub_v1_0_init_gart_aperture_regs(struct amdgpu_device *adev)
 {
-	uint64_t pt_base = amdgpu_gmc_pd_addr(adev->gart.bo);
+	uint64_t pt_base;
 
-	gfxhub_v1_0_setup_vm_pt_regs(adev, 0, pt_base);
+	if (adev->gmc.pdb0_bo)
+		pt_base = amdgpu_gmc_pd_addr(adev->gmc.pdb0_bo);
+	else
+		pt_base = amdgpu_gmc_pd_addr(adev->gart.bo);
 
-	WREG32_SOC15(GC, 0, mmVM_CONTEXT0_PAGE_TABLE_START_ADDR_LO32,
-		     (u32)(adev->gmc.gart_start >> 12));
-	WREG32_SOC15(GC, 0, mmVM_CONTEXT0_PAGE_TABLE_START_ADDR_HI32,
-		     (u32)(adev->gmc.gart_start >> 44));
+	gfxhub_v1_0_setup_vm_pt_regs(adev, 0, pt_base);
 
-	WREG32_SOC15(GC, 0, mmVM_CONTEXT0_PAGE_TABLE_END_ADDR_LO32,
-		     (u32)(adev->gmc.gart_end >> 12));
-	WREG32_SOC15(GC, 0, mmVM_CONTEXT0_PAGE_TABLE_END_ADDR_HI32,
-		     (u32)(adev->gmc.gart_end >> 44));
+	/* If use GART for FB translation, vmid0 page table covers both
+	 * vram and system memory (gart)
+	 */
+	if (adev->gmc.pdb0_bo) {
+		WREG32_SOC15(GC, 0, mmVM_CONTEXT0_PAGE_TABLE_START_ADDR_LO32,
+				(u32)(adev->gmc.fb_start >> 12));
+		WREG32_SOC15(GC, 0, mmVM_CONTEXT0_PAGE_TABLE_START_ADDR_HI32,
+				(u32)(adev->gmc.fb_start >> 44));
+
+		WREG32_SOC15(GC, 0, mmVM_CONTEXT0_PAGE_TABLE_END_ADDR_LO32,
+				(u32)(adev->gmc.gart_end >> 12));
+		WREG32_SOC15(GC, 0, mmVM_CONTEXT0_PAGE_TABLE_END_ADDR_HI32,
+				(u32)(adev->gmc.gart_end >> 44));
+	} else {
+		WREG32_SOC15(GC, 0, mmVM_CONTEXT0_PAGE_TABLE_START_ADDR_LO32,
+				(u32)(adev->gmc.gart_start >> 12));
+		WREG32_SOC15(GC, 0, mmVM_CONTEXT0_PAGE_TABLE_START_ADDR_HI32,
+				(u32)(adev->gmc.gart_start >> 44));
+
+		WREG32_SOC15(GC, 0, mmVM_CONTEXT0_PAGE_TABLE_END_ADDR_LO32,
+				(u32)(adev->gmc.gart_end >> 12));
+		WREG32_SOC15(GC, 0, mmVM_CONTEXT0_PAGE_TABLE_END_ADDR_HI32,
+				(u32)(adev->gmc.gart_end >> 44));
+	}
 }
 
 static void gfxhub_v1_0_init_system_aperture_regs(struct amdgpu_device *adev)
@@ -116,6 +136,18 @@ static void gfxhub_v1_0_init_system_aperture_regs(struct amdgpu_device *adev)
 		WREG32_FIELD15(GC, 0, VM_L2_PROTECTION_FAULT_CNTL2,
 			       ACTIVE_PAGE_MIGRATION_PTE_READ_RETRY, 1);
 	}
+
+	/* In the case squeezing vram into GART aperture, we don't use
+	 * FB aperture and AGP aperture. Disable them.
+	 */
+	if (adev->gmc.pdb0_bo) {
+		WREG32_SOC15(GC, 0, mmMC_VM_FB_LOCATION_TOP, 0);
+		WREG32_SOC15(GC, 0, mmMC_VM_FB_LOCATION_BASE, 0x00FFFFFF);
+		WREG32_SOC15(GC, 0, mmMC_VM_AGP_TOP, 0);
+		WREG32_SOC15(GC, 0, mmMC_VM_AGP_BOT, 0xFFFFFF);
+		WREG32_SOC15(GC, 0, mmMC_VM_SYSTEM_APERTURE_LOW_ADDR, 0x3FFFFFFF);
+		WREG32_SOC15(GC, 0, mmMC_VM_SYSTEM_APERTURE_HIGH_ADDR, 0);
+	}
 }
 
 static void gfxhub_v1_0_init_tlb_regs(struct amdgpu_device *adev)

drivers/gpu/drm/amd/amdgpu/mmhub_v1_7.c

@@ -65,19 +65,40 @@ void mmhub_v1_7_setup_vm_pt_regs(struct amdgpu_device *adev, uint32_t vmid,
 
 static void mmhub_v1_7_init_gart_aperture_regs(struct amdgpu_device *adev)
 {
-	uint64_t pt_base = amdgpu_gmc_pd_addr(adev->gart.bo);
+	uint64_t pt_base;
+
+	if (adev->gmc.pdb0_bo)
+		pt_base = amdgpu_gmc_pd_addr(adev->gmc.pdb0_bo);
+	else
+		pt_base = amdgpu_gmc_pd_addr(adev->gart.bo);
 
 	mmhub_v1_7_setup_vm_pt_regs(adev, 0, pt_base);
 
-	WREG32_SOC15(MMHUB, 0, regVM_CONTEXT0_PAGE_TABLE_START_ADDR_LO32,
-		     (u32)(adev->gmc.gart_start >> 12));
-	WREG32_SOC15(MMHUB, 0, regVM_CONTEXT0_PAGE_TABLE_START_ADDR_HI32,
-		     (u32)(adev->gmc.gart_start >> 44));
+	/* If use GART for FB translation, vmid0 page table covers both
+	 * vram and system memory (gart)
+	 */
+	if (adev->gmc.pdb0_bo) {
+		WREG32_SOC15(MMHUB, 0, regVM_CONTEXT0_PAGE_TABLE_START_ADDR_LO32,
+				(u32)(adev->gmc.fb_start >> 12));
+		WREG32_SOC15(MMHUB, 0, regVM_CONTEXT0_PAGE_TABLE_START_ADDR_HI32,
+				(u32)(adev->gmc.fb_start >> 44));
+
+		WREG32_SOC15(MMHUB, 0, regVM_CONTEXT0_PAGE_TABLE_END_ADDR_LO32,
+				(u32)(adev->gmc.gart_end >> 12));
+		WREG32_SOC15(MMHUB, 0, regVM_CONTEXT0_PAGE_TABLE_END_ADDR_HI32,
+				(u32)(adev->gmc.gart_end >> 44));
 
-	WREG32_SOC15(MMHUB, 0, regVM_CONTEXT0_PAGE_TABLE_END_ADDR_LO32,
-		     (u32)(adev->gmc.gart_end >> 12));
-	WREG32_SOC15(MMHUB, 0, regVM_CONTEXT0_PAGE_TABLE_END_ADDR_HI32,
-		     (u32)(adev->gmc.gart_end >> 44));
+	} else {
+		WREG32_SOC15(MMHUB, 0, regVM_CONTEXT0_PAGE_TABLE_START_ADDR_LO32,
+				(u32)(adev->gmc.gart_start >> 12));
+		WREG32_SOC15(MMHUB, 0, regVM_CONTEXT0_PAGE_TABLE_START_ADDR_HI32,
+				(u32)(adev->gmc.gart_start >> 44));
+
+		WREG32_SOC15(MMHUB, 0, regVM_CONTEXT0_PAGE_TABLE_END_ADDR_LO32,
+				(u32)(adev->gmc.gart_end >> 12));
+		WREG32_SOC15(MMHUB, 0, regVM_CONTEXT0_PAGE_TABLE_END_ADDR_HI32,
+				(u32)(adev->gmc.gart_end >> 44));
+	}
 }
 
 static void mmhub_v1_7_init_system_aperture_regs(struct amdgpu_device *adev)
@@ -97,6 +118,17 @@ static void mmhub_v1_7_init_system_aperture_regs(struct amdgpu_device *adev)
 	WREG32_SOC15(MMHUB, 0, regMC_VM_SYSTEM_APERTURE_HIGH_ADDR,
 		     max(adev->gmc.fb_end, adev->gmc.agp_end) >> 18);
 
+	/* In the case squeezing vram into GART aperture, we don't use
+	 * FB aperture and AGP aperture. Disable them.
+	 */
+	if (adev->gmc.pdb0_bo) {
+		WREG32_SOC15(MMHUB, 0, regMC_VM_AGP_BOT, 0xFFFFFF);
+		WREG32_SOC15(MMHUB, 0, regMC_VM_AGP_TOP, 0);
+		WREG32_SOC15(MMHUB, 0, regMC_VM_FB_LOCATION_TOP, 0);
+		WREG32_SOC15(MMHUB, 0, regMC_VM_FB_LOCATION_BASE, 0x00FFFFFF);
+		WREG32_SOC15(MMHUB, 0, regMC_VM_SYSTEM_APERTURE_LOW_ADDR, 0x3FFFFFFF);
+		WREG32_SOC15(MMHUB, 0, regMC_VM_SYSTEM_APERTURE_HIGH_ADDR, 0);
+	}
 	if (amdgpu_sriov_vf(adev))
 		return;