drm/amdgpu: add mmhub v9.4.1 block for Arcturus (v2)

Arcturus as an updated mmhub block. mmhub is the
memory controller hub used for sdma and multimedia.

v2: squash in AGP BAR programming (Alex)

Signed-off-by: Le Ma <le.ma@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

3 files changed, 538 insertions, 1 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/Makefile b/drivers/gpu/drm/amd/amdgpu/Makefile
index 3f5329906fce..7b6fb0e9ee76 100644
--- a/drivers/gpu/drm/amd/amdgpu/Makefile
+++ b/drivers/gpu/drm/amd/amdgpu/Makefile
@@ -77,7 +77,7 @@ amdgpu-y += \
 amdgpu-y += \
 	gmc_v7_0.o \
 	gmc_v8_0.o \
-	gfxhub_v1_0.o mmhub_v1_0.o gmc_v9_0.o gfxhub_v1_1.o \
+	gfxhub_v1_0.o mmhub_v1_0.o gmc_v9_0.o gfxhub_v1_1.o mmhub_v9_4.o \
 	gfxhub_v2_0.o mmhub_v2_0.o gmc_v10_0.o
 
 # add IH block
diff --git a/drivers/gpu/drm/amd/amdgpu/mmhub_v9_4.c b/drivers/gpu/drm/amd/amdgpu/mmhub_v9_4.c
new file mode 100644
index 000000000000..aa9b43b6ba6b
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/mmhub_v9_4.c
@@ -0,0 +1,504 @@
+/*
+ * Copyright 2018 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+#include "amdgpu.h"
+#include "mmhub_v9_4.h"
+
+#include "mmhub/mmhub_9_4_1_offset.h"
+#include "mmhub/mmhub_9_4_1_sh_mask.h"
+#include "mmhub/mmhub_9_4_1_default.h"
+#include "athub/athub_1_0_offset.h"
+#include "athub/athub_1_0_sh_mask.h"
+#include "vega10_enum.h"
+
+#include "soc15_common.h"
+
+#define MMHUB_NUM_INSTANCES			2
+#define MMHUB_INSTANCE_REGISTER_OFFSET		0x3000
+
+u64 mmhub_v9_4_get_fb_location(struct amdgpu_device *adev)
+{
+	/* The base should be same b/t 2 mmhubs on Acrturus. Read one here. */
+	u64 base = RREG32_SOC15(MMHUB, 0, mmVMSHAREDVC0_MC_VM_FB_LOCATION_BASE);
+
+	base &= VMSHAREDVC0_MC_VM_FB_LOCATION_BASE__FB_BASE_MASK;
+	base <<= 24;
+
+	return base;
+}
+
+static void mmhub_v9_4_init_gart_pt_regs(struct amdgpu_device *adev, int hubid)
+{
+	uint64_t value = amdgpu_gmc_pd_addr(adev->gart.bo);
+
+	WREG32_SOC15_OFFSET(MMHUB, 0,
+			    mmVML2VC0_VM_CONTEXT0_PAGE_TABLE_BASE_ADDR_LO32,
+			    hubid * MMHUB_INSTANCE_REGISTER_OFFSET,
+			    lower_32_bits(value));
+
+	WREG32_SOC15_OFFSET(MMHUB, 0,
+			    mmVML2VC0_VM_CONTEXT0_PAGE_TABLE_BASE_ADDR_HI32,
+			    hubid * MMHUB_INSTANCE_REGISTER_OFFSET,
+			    upper_32_bits(value));
+
+}
+
+static void mmhub_v9_4_init_gart_aperture_regs(struct amdgpu_device *adev,
+					       int hubid)
+{
+	mmhub_v9_4_init_gart_pt_regs(adev, hubid);
+
+	WREG32_SOC15_OFFSET(MMHUB, 0,
+			    mmVML2VC0_VM_CONTEXT0_PAGE_TABLE_START_ADDR_LO32,
+			    hubid * MMHUB_INSTANCE_REGISTER_OFFSET,
+			    (u32)(adev->gmc.gart_start >> 12));
+	WREG32_SOC15_OFFSET(MMHUB, 0,
+			    mmVML2VC0_VM_CONTEXT0_PAGE_TABLE_START_ADDR_HI32,
+			    hubid * MMHUB_INSTANCE_REGISTER_OFFSET,
+			    (u32)(adev->gmc.gart_start >> 44));
+
+	WREG32_SOC15_OFFSET(MMHUB, 0,
+			    mmVML2VC0_VM_CONTEXT0_PAGE_TABLE_END_ADDR_LO32,
+			    hubid * MMHUB_INSTANCE_REGISTER_OFFSET,
+			    (u32)(adev->gmc.gart_end >> 12));
+	WREG32_SOC15_OFFSET(MMHUB, 0,
+			    mmVML2VC0_VM_CONTEXT0_PAGE_TABLE_END_ADDR_HI32,
+			    hubid * MMHUB_INSTANCE_REGISTER_OFFSET,
+			    (u32)(adev->gmc.gart_end >> 44));
+}
+
+static void mmhub_v9_4_init_system_aperture_regs(struct amdgpu_device *adev,
+					         int hubid)
+{
+	uint64_t value;
+	uint32_t tmp;
+
+	/* Program the AGP BAR */
+	WREG32_SOC15_OFFSET(MMHUB, 0, mmVMSHAREDVC0_MC_VM_AGP_BASE,
+			    hubid * MMHUB_INSTANCE_REGISTER_OFFSET,
+			    0);
+	WREG32_SOC15_OFFSET(MMHUB, 0, mmVMSHAREDVC0_MC_VM_AGP_TOP,
+			    hubid * MMHUB_INSTANCE_REGISTER_OFFSET,
+			    adev->gmc.agp_end >> 24);
+	WREG32_SOC15_OFFSET(MMHUB, 0, mmVMSHAREDVC0_MC_VM_AGP_BOT,
+			    hubid * MMHUB_INSTANCE_REGISTER_OFFSET,
+			    adev->gmc.agp_start >> 24);
+
+	/* Program the system aperture low logical page number. */
+	WREG32_SOC15_OFFSET(MMHUB, 0,
+			    mmVMSHAREDVC0_MC_VM_SYSTEM_APERTURE_LOW_ADDR,
+			    hubid * MMHUB_INSTANCE_REGISTER_OFFSET,
+			    min(adev->gmc.vram_start, adev->gmc.agp_start)
+			    >> 18);
+	WREG32_SOC15_OFFSET(MMHUB, 0,
+			    mmVMSHAREDVC0_MC_VM_SYSTEM_APERTURE_HIGH_ADDR,
+			    hubid * MMHUB_INSTANCE_REGISTER_OFFSET,
+			    max(adev->gmc.vram_end, adev->gmc.agp_end) >> 18);
+
+	/* Set default page address. */
+	value = adev->vram_scratch.gpu_addr - adev->gmc.vram_start +
+		adev->vm_manager.vram_base_offset;
+	WREG32_SOC15_OFFSET(MMHUB, 0,
+			mmVMSHAREDPF0_MC_VM_SYSTEM_APERTURE_DEFAULT_ADDR_LSB,
+			hubid * MMHUB_INSTANCE_REGISTER_OFFSET,
+			(u32)(value >> 12));
+	WREG32_SOC15_OFFSET(MMHUB, 0,
+			mmVMSHAREDPF0_MC_VM_SYSTEM_APERTURE_DEFAULT_ADDR_MSB,
+			hubid * MMHUB_INSTANCE_REGISTER_OFFSET,
+			(u32)(value >> 44));
+
+	/* Program "protection fault". */
+	WREG32_SOC15_OFFSET(MMHUB, 0,
+			    mmVML2PF0_VM_L2_PROTECTION_FAULT_DEFAULT_ADDR_LO32,
+			    hubid * MMHUB_INSTANCE_REGISTER_OFFSET,
+			    (u32)(adev->dummy_page_addr >> 12));
+	WREG32_SOC15_OFFSET(MMHUB, 0,
+			    mmVML2PF0_VM_L2_PROTECTION_FAULT_DEFAULT_ADDR_HI32,
+			    hubid * MMHUB_INSTANCE_REGISTER_OFFSET,
+			    (u32)((u64)adev->dummy_page_addr >> 44));
+
+	tmp = RREG32_SOC15_OFFSET(MMHUB, 0,
+				  mmVML2PF0_VM_L2_PROTECTION_FAULT_CNTL2,
+				  hubid * MMHUB_INSTANCE_REGISTER_OFFSET);
+	tmp = REG_SET_FIELD(tmp, VML2PF0_VM_L2_PROTECTION_FAULT_CNTL2,
+			    ACTIVE_PAGE_MIGRATION_PTE_READ_RETRY, 1);
+	WREG32_SOC15_OFFSET(MMHUB, 0, mmVML2PF0_VM_L2_PROTECTION_FAULT_CNTL2,
+			    hubid * MMHUB_INSTANCE_REGISTER_OFFSET, tmp);
+}
+
+static void mmhub_v9_4_init_tlb_regs(struct amdgpu_device *adev, int hubid)
+{
+	uint32_t tmp;
+
+	/* Setup TLB control */
+	tmp = RREG32_SOC15_OFFSET(MMHUB, 0,
+			   mmVMSHAREDVC0_MC_VM_MX_L1_TLB_CNTL,
+			   hubid * MMHUB_INSTANCE_REGISTER_OFFSET);
+
+	tmp = REG_SET_FIELD(tmp, VMSHAREDVC0_MC_VM_MX_L1_TLB_CNTL,
+			    ENABLE_L1_TLB, 1);
+	tmp = REG_SET_FIELD(tmp, VMSHAREDVC0_MC_VM_MX_L1_TLB_CNTL,
+			    SYSTEM_ACCESS_MODE, 3);
+	tmp = REG_SET_FIELD(tmp, VMSHAREDVC0_MC_VM_MX_L1_TLB_CNTL,
+			    ENABLE_ADVANCED_DRIVER_MODEL, 1);
+	tmp = REG_SET_FIELD(tmp, VMSHAREDVC0_MC_VM_MX_L1_TLB_CNTL,
+			    SYSTEM_APERTURE_UNMAPPED_ACCESS, 0);
+	tmp = REG_SET_FIELD(tmp, VMSHAREDVC0_MC_VM_MX_L1_TLB_CNTL,
+			    ECO_BITS, 0);
+	tmp = REG_SET_FIELD(tmp, VMSHAREDVC0_MC_VM_MX_L1_TLB_CNTL,
+			    MTYPE, MTYPE_UC);/* XXX for emulation. */
+	tmp = REG_SET_FIELD(tmp, VMSHAREDVC0_MC_VM_MX_L1_TLB_CNTL,
+			    ATC_EN, 1);
+
+	WREG32_SOC15_OFFSET(MMHUB, 0, mmVMSHAREDVC0_MC_VM_MX_L1_TLB_CNTL,
+			    hubid * MMHUB_INSTANCE_REGISTER_OFFSET, tmp);
+}
+
+static void mmhub_v9_4_init_cache_regs(struct amdgpu_device *adev, int hubid)
+{
+	uint32_t tmp;
+
+	/* Setup L2 cache */
+	tmp = RREG32_SOC15_OFFSET(MMHUB, 0, mmVML2PF0_VM_L2_CNTL,
+				  hubid * MMHUB_INSTANCE_REGISTER_OFFSET);
+	tmp = REG_SET_FIELD(tmp, VML2PF0_VM_L2_CNTL,
+			    ENABLE_L2_CACHE, 1);
+	tmp = REG_SET_FIELD(tmp, VML2PF0_VM_L2_CNTL,
+			    ENABLE_L2_FRAGMENT_PROCESSING, 1);
+	/* XXX for emulation, Refer to closed source code.*/
+	tmp = REG_SET_FIELD(tmp, VML2PF0_VM_L2_CNTL,
+			    L2_PDE0_CACHE_TAG_GENERATION_MODE, 0);
+	tmp = REG_SET_FIELD(tmp, VML2PF0_VM_L2_CNTL,
+			    PDE_FAULT_CLASSIFICATION, 1);
+	tmp = REG_SET_FIELD(tmp, VML2PF0_VM_L2_CNTL,
+			    CONTEXT1_IDENTITY_ACCESS_MODE, 1);
+	tmp = REG_SET_FIELD(tmp, VML2PF0_VM_L2_CNTL,
+			    IDENTITY_MODE_FRAGMENT_SIZE, 0);
+	WREG32_SOC15_OFFSET(MMHUB, 0, mmVML2PF0_VM_L2_CNTL,
+		     hubid * MMHUB_INSTANCE_REGISTER_OFFSET, tmp);
+
+	tmp = RREG32_SOC15_OFFSET(MMHUB, 0, mmVML2PF0_VM_L2_CNTL2,
+				  hubid * MMHUB_INSTANCE_REGISTER_OFFSET);
+	tmp = REG_SET_FIELD(tmp, VML2PF0_VM_L2_CNTL2,
+			    INVALIDATE_ALL_L1_TLBS, 1);
+	tmp = REG_SET_FIELD(tmp, VML2PF0_VM_L2_CNTL2,
+			    INVALIDATE_L2_CACHE, 1);
+	WREG32_SOC15_OFFSET(MMHUB, 0, mmVML2PF0_VM_L2_CNTL2,
+			    hubid * MMHUB_INSTANCE_REGISTER_OFFSET, tmp);
+
+	tmp = mmVML2PF0_VM_L2_CNTL3_DEFAULT;
+	WREG32_SOC15_OFFSET(MMHUB, 0, mmVML2PF0_VM_L2_CNTL3,
+			    hubid * MMHUB_INSTANCE_REGISTER_OFFSET, tmp);
+
+	tmp = mmVML2PF0_VM_L2_CNTL4_DEFAULT;
+	tmp = REG_SET_FIELD(tmp, VML2PF0_VM_L2_CNTL4,
+			    VMC_TAP_PDE_REQUEST_PHYSICAL, 0);
+	tmp = REG_SET_FIELD(tmp, VML2PF0_VM_L2_CNTL4,
+			    VMC_TAP_PTE_REQUEST_PHYSICAL, 0);
+	WREG32_SOC15_OFFSET(MMHUB, 0, mmVML2PF0_VM_L2_CNTL4,
+			    hubid * MMHUB_INSTANCE_REGISTER_OFFSET, tmp);
+}
+
+static void mmhub_v9_4_enable_system_domain(struct amdgpu_device *adev,
+					    int hubid)
+{
+	uint32_t tmp;
+
+	tmp = RREG32_SOC15_OFFSET(MMHUB, 0, mmVML2VC0_VM_CONTEXT0_CNTL,
+				  hubid * MMHUB_INSTANCE_REGISTER_OFFSET);
+	tmp = REG_SET_FIELD(tmp, VML2VC0_VM_CONTEXT0_CNTL, ENABLE_CONTEXT, 1);
+	tmp = REG_SET_FIELD(tmp, VML2VC0_VM_CONTEXT0_CNTL, PAGE_TABLE_DEPTH, 0);
+	WREG32_SOC15_OFFSET(MMHUB, 0, mmVML2VC0_VM_CONTEXT0_CNTL,
+			    hubid * MMHUB_INSTANCE_REGISTER_OFFSET, tmp);
+}
+
+static void mmhub_v9_4_disable_identity_aperture(struct amdgpu_device *adev,
+						 int hubid)
+{
+	WREG32_SOC15_OFFSET(MMHUB, 0,
+		    mmVML2PF0_VM_L2_CONTEXT1_IDENTITY_APERTURE_LOW_ADDR_LO32,
+		    hubid * MMHUB_INSTANCE_REGISTER_OFFSET, 0XFFFFFFFF);
+	WREG32_SOC15_OFFSET(MMHUB, 0,
+		    mmVML2PF0_VM_L2_CONTEXT1_IDENTITY_APERTURE_LOW_ADDR_HI32,
+		    hubid * MMHUB_INSTANCE_REGISTER_OFFSET, 0x0000000F);
+
+	WREG32_SOC15_OFFSET(MMHUB, 0,
+		    mmVML2PF0_VM_L2_CONTEXT1_IDENTITY_APERTURE_HIGH_ADDR_LO32,
+		    hubid * MMHUB_INSTANCE_REGISTER_OFFSET, 0);
+	WREG32_SOC15_OFFSET(MMHUB, 0,
+		    mmVML2PF0_VM_L2_CONTEXT1_IDENTITY_APERTURE_HIGH_ADDR_HI32,
+		    hubid * MMHUB_INSTANCE_REGISTER_OFFSET, 0);
+
+	WREG32_SOC15_OFFSET(MMHUB, 0,
+		    mmVML2PF0_VM_L2_CONTEXT_IDENTITY_PHYSICAL_OFFSET_LO32,
+		    hubid * MMHUB_INSTANCE_REGISTER_OFFSET, 0);
+	WREG32_SOC15_OFFSET(MMHUB, 0,
+		    mmVML2PF0_VM_L2_CONTEXT_IDENTITY_PHYSICAL_OFFSET_HI32,
+		    hubid * MMHUB_INSTANCE_REGISTER_OFFSET, 0);
+}
+
+static void mmhub_v9_4_setup_vmid_config(struct amdgpu_device *adev, int hubid)
+{
+	uint32_t tmp;
+	int i;
+
+	for (i = 0; i <= 14; i++) {
+		tmp = RREG32_SOC15_OFFSET(MMHUB, 0, mmVML2VC0_VM_CONTEXT1_CNTL,
+				hubid * MMHUB_INSTANCE_REGISTER_OFFSET + i);
+		tmp = REG_SET_FIELD(tmp, VML2VC0_VM_CONTEXT1_CNTL,
+				    ENABLE_CONTEXT, 1);
+		tmp = REG_SET_FIELD(tmp, VML2VC0_VM_CONTEXT1_CNTL,
+				    PAGE_TABLE_DEPTH,
+				    adev->vm_manager.num_level);
+		tmp = REG_SET_FIELD(tmp, VML2VC0_VM_CONTEXT1_CNTL,
+				    RANGE_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
+		tmp = REG_SET_FIELD(tmp, VML2VC0_VM_CONTEXT1_CNTL,
+				    DUMMY_PAGE_PROTECTION_FAULT_ENABLE_DEFAULT,
+				    1);
+		tmp = REG_SET_FIELD(tmp, VML2VC0_VM_CONTEXT1_CNTL,
+				    PDE0_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
+		tmp = REG_SET_FIELD(tmp, VML2VC0_VM_CONTEXT1_CNTL,
+				    VALID_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
+		tmp = REG_SET_FIELD(tmp, VML2VC0_VM_CONTEXT1_CNTL,
+				    READ_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
+		tmp = REG_SET_FIELD(tmp, VML2VC0_VM_CONTEXT1_CNTL,
+				    WRITE_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
+		tmp = REG_SET_FIELD(tmp, VML2VC0_VM_CONTEXT1_CNTL,
+				    EXECUTE_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
+		tmp = REG_SET_FIELD(tmp, VML2VC0_VM_CONTEXT1_CNTL,
+				    PAGE_TABLE_BLOCK_SIZE,
+				    adev->vm_manager.block_size - 9);
+		/* Send no-retry XNACK on fault to suppress VM fault storm. */
+		tmp = REG_SET_FIELD(tmp, VML2VC0_VM_CONTEXT1_CNTL,
+				    RETRY_PERMISSION_OR_INVALID_PAGE_FAULT, 0);
+		WREG32_SOC15_OFFSET(MMHUB, 0, mmVML2VC0_VM_CONTEXT1_CNTL,
+				    hubid * MMHUB_INSTANCE_REGISTER_OFFSET + i,
+				    tmp);
+		WREG32_SOC15_OFFSET(MMHUB, 0,
+			    mmVML2VC0_VM_CONTEXT1_PAGE_TABLE_START_ADDR_LO32,
+			    hubid * MMHUB_INSTANCE_REGISTER_OFFSET + i*2, 0);
+		WREG32_SOC15_OFFSET(MMHUB, 0,
+			    mmVML2VC0_VM_CONTEXT1_PAGE_TABLE_START_ADDR_HI32,
+			    hubid * MMHUB_INSTANCE_REGISTER_OFFSET + i*2, 0);
+		WREG32_SOC15_OFFSET(MMHUB, 0,
+				mmVML2VC0_VM_CONTEXT1_PAGE_TABLE_END_ADDR_LO32,
+				hubid * MMHUB_INSTANCE_REGISTER_OFFSET + i*2,
+				lower_32_bits(adev->vm_manager.max_pfn - 1));
+		WREG32_SOC15_OFFSET(MMHUB, 0,
+				mmVML2VC0_VM_CONTEXT1_PAGE_TABLE_END_ADDR_HI32,
+				hubid * MMHUB_INSTANCE_REGISTER_OFFSET + i*2,
+				upper_32_bits(adev->vm_manager.max_pfn - 1));
+	}
+}
+
+static void mmhub_v9_4_program_invalidation(struct amdgpu_device *adev,
+					    int hubid)
+{
+	unsigned i;
+
+	for (i = 0; i < 18; ++i) {
+		WREG32_SOC15_OFFSET(MMHUB, 0,
+				mmVML2VC0_VM_INVALIDATE_ENG0_ADDR_RANGE_LO32,
+				hubid * MMHUB_INSTANCE_REGISTER_OFFSET + 2 * i,
+				0xffffffff);
+		WREG32_SOC15_OFFSET(MMHUB, 0,
+				mmVML2VC0_VM_INVALIDATE_ENG0_ADDR_RANGE_HI32,
+				hubid * MMHUB_INSTANCE_REGISTER_OFFSET + 2 * i,
+				0x1f);
+	}
+}
+
+int mmhub_v9_4_gart_enable(struct amdgpu_device *adev)
+{
+	int i;
+
+	for (i = 0; i < MMHUB_NUM_INSTANCES; i++) {
+		if (amdgpu_sriov_vf(adev)) {
+			/*
+			 * MC_VM_FB_LOCATION_BASE/TOP is NULL for VF, becuase
+			 * they are VF copy registers so vbios post doesn't
+			 * program them, for SRIOV driver need to program them
+			 */
+			WREG32_SOC15_OFFSET(MMHUB, 0,
+				     mmVMSHAREDVC0_MC_VM_FB_LOCATION_BASE,
+				     i * MMHUB_INSTANCE_REGISTER_OFFSET,
+				     adev->gmc.vram_start >> 24);
+			WREG32_SOC15_OFFSET(MMHUB, 0,
+				     mmVMSHAREDVC0_MC_VM_FB_LOCATION_TOP,
+				     i * MMHUB_INSTANCE_REGISTER_OFFSET,
+				     adev->gmc.vram_end >> 24);
+		}
+
+		/* GART Enable. */
+		mmhub_v9_4_init_gart_aperture_regs(adev, i);
+		mmhub_v9_4_init_system_aperture_regs(adev, i);
+		mmhub_v9_4_init_tlb_regs(adev, i);
+		mmhub_v9_4_init_cache_regs(adev, i);
+
+		mmhub_v9_4_enable_system_domain(adev, i);
+		mmhub_v9_4_disable_identity_aperture(adev, i);
+		mmhub_v9_4_setup_vmid_config(adev, i);
+		mmhub_v9_4_program_invalidation(adev, i);
+	}
+
+	return 0;
+}
+
+void mmhub_v9_4_gart_disable(struct amdgpu_device *adev)
+{
+	u32 tmp;
+	u32 i, j;
+
+	for (j = 0; j < MMHUB_NUM_INSTANCES; j++) {
+		/* Disable all tables */
+		for (i = 0; i < 16; i++)
+			WREG32_SOC15_OFFSET(MMHUB, 0,
+					    mmVML2VC0_VM_CONTEXT0_CNTL,
+					    j * MMHUB_INSTANCE_REGISTER_OFFSET +
+					    i, 0);
+
+		/* Setup TLB control */
+		tmp = RREG32_SOC15_OFFSET(MMHUB, 0,
+				   mmVMSHAREDVC0_MC_VM_MX_L1_TLB_CNTL,
+				   j * MMHUB_INSTANCE_REGISTER_OFFSET);
+		tmp = REG_SET_FIELD(tmp, VMSHAREDVC0_MC_VM_MX_L1_TLB_CNTL,
+				    ENABLE_L1_TLB, 0);
+		tmp = REG_SET_FIELD(tmp,
+				    VMSHAREDVC0_MC_VM_MX_L1_TLB_CNTL,
+				    ENABLE_ADVANCED_DRIVER_MODEL, 0);
+		WREG32_SOC15_OFFSET(MMHUB, 0,
+				    mmVMSHAREDVC0_MC_VM_MX_L1_TLB_CNTL,
+				    j * MMHUB_INSTANCE_REGISTER_OFFSET, tmp);
+
+		/* Setup L2 cache */
+		tmp = RREG32_SOC15_OFFSET(MMHUB, 0, mmVML2PF0_VM_L2_CNTL,
+					  j * MMHUB_INSTANCE_REGISTER_OFFSET);
+		tmp = REG_SET_FIELD(tmp, VML2PF0_VM_L2_CNTL,
+				    ENABLE_L2_CACHE, 0);
+		WREG32_SOC15_OFFSET(MMHUB, 0, mmVML2PF0_VM_L2_CNTL,
+				    j * MMHUB_INSTANCE_REGISTER_OFFSET, tmp);
+		WREG32_SOC15_OFFSET(MMHUB, 0, mmVML2PF0_VM_L2_CNTL3,
+				    j * MMHUB_INSTANCE_REGISTER_OFFSET, 0);
+	}
+}
+
+/**
+ * mmhub_v1_0_set_fault_enable_default - update GART/VM fault handling
+ *
+ * @adev: amdgpu_device pointer
+ * @value: true redirects VM faults to the default page
+ */
+void mmhub_v9_4_set_fault_enable_default(struct amdgpu_device *adev, bool value)
+{
+	u32 tmp;
+	int i;
+
+	for (i = 0; i < MMHUB_NUM_INSTANCES; i++) {
+		tmp = RREG32_SOC15_OFFSET(MMHUB, 0,
+					  mmVML2PF0_VM_L2_PROTECTION_FAULT_CNTL,
+					  i * MMHUB_INSTANCE_REGISTER_OFFSET);
+		tmp = REG_SET_FIELD(tmp, VML2PF0_VM_L2_PROTECTION_FAULT_CNTL,
+				    RANGE_PROTECTION_FAULT_ENABLE_DEFAULT,
+				    value);
+		tmp = REG_SET_FIELD(tmp, VML2PF0_VM_L2_PROTECTION_FAULT_CNTL,
+				    PDE0_PROTECTION_FAULT_ENABLE_DEFAULT,
+				    value);
+		tmp = REG_SET_FIELD(tmp, VML2PF0_VM_L2_PROTECTION_FAULT_CNTL,
+				    PDE1_PROTECTION_FAULT_ENABLE_DEFAULT,
+				    value);
+		tmp = REG_SET_FIELD(tmp, VML2PF0_VM_L2_PROTECTION_FAULT_CNTL,
+				    PDE2_PROTECTION_FAULT_ENABLE_DEFAULT,
+				    value);
+		tmp = REG_SET_FIELD(tmp,
+			    VML2PF0_VM_L2_PROTECTION_FAULT_CNTL,
+			    TRANSLATE_FURTHER_PROTECTION_FAULT_ENABLE_DEFAULT,
+			    value);
+		tmp = REG_SET_FIELD(tmp, VML2PF0_VM_L2_PROTECTION_FAULT_CNTL,
+				    NACK_PROTECTION_FAULT_ENABLE_DEFAULT,
+				    value);
+		tmp = REG_SET_FIELD(tmp, VML2PF0_VM_L2_PROTECTION_FAULT_CNTL,
+				    DUMMY_PAGE_PROTECTION_FAULT_ENABLE_DEFAULT,
+				    value);
+		tmp = REG_SET_FIELD(tmp, VML2PF0_VM_L2_PROTECTION_FAULT_CNTL,
+				    VALID_PROTECTION_FAULT_ENABLE_DEFAULT,
+				    value);
+		tmp = REG_SET_FIELD(tmp, VML2PF0_VM_L2_PROTECTION_FAULT_CNTL,
+				    READ_PROTECTION_FAULT_ENABLE_DEFAULT,
+				    value);
+		tmp = REG_SET_FIELD(tmp, VML2PF0_VM_L2_PROTECTION_FAULT_CNTL,
+				    WRITE_PROTECTION_FAULT_ENABLE_DEFAULT,
+				    value);
+		tmp = REG_SET_FIELD(tmp, VML2PF0_VM_L2_PROTECTION_FAULT_CNTL,
+				    EXECUTE_PROTECTION_FAULT_ENABLE_DEFAULT,
+				    value);
+		if (!value) {
+			tmp = REG_SET_FIELD(tmp,
+					    VML2PF0_VM_L2_PROTECTION_FAULT_CNTL,
+					    CRASH_ON_NO_RETRY_FAULT, 1);
+			tmp = REG_SET_FIELD(tmp,
+					    VML2PF0_VM_L2_PROTECTION_FAULT_CNTL,
+					    CRASH_ON_RETRY_FAULT, 1);
+		}
+
+		WREG32_SOC15_OFFSET(MMHUB, 0,
+				    mmVML2PF0_VM_L2_PROTECTION_FAULT_CNTL,
+				    i * MMHUB_INSTANCE_REGISTER_OFFSET, tmp);
+	}
+}
+
+void mmhub_v9_4_init(struct amdgpu_device *adev)
+{
+	struct amdgpu_vmhub *hub[MMHUB_NUM_INSTANCES] =
+		{&adev->vmhub[AMDGPU_MMHUB_0], &adev->vmhub[AMDGPU_MMHUB_1]};
+	int i;
+
+	for (i = 0; i < MMHUB_NUM_INSTANCES; i++) {
+		hub[i]->ctx0_ptb_addr_lo32 =
+			SOC15_REG_OFFSET(MMHUB, 0,
+			    mmVML2VC0_VM_CONTEXT0_PAGE_TABLE_BASE_ADDR_LO32) +
+			    i * MMHUB_INSTANCE_REGISTER_OFFSET;
+		hub[i]->ctx0_ptb_addr_hi32 =
+			SOC15_REG_OFFSET(MMHUB, 0,
+			    mmVML2VC0_VM_CONTEXT0_PAGE_TABLE_BASE_ADDR_HI32) +
+			    i * MMHUB_INSTANCE_REGISTER_OFFSET;
+		hub[i]->vm_inv_eng0_req =
+			SOC15_REG_OFFSET(MMHUB, 0,
+					 mmVML2VC0_VM_INVALIDATE_ENG0_REQ) +
+					 i * MMHUB_INSTANCE_REGISTER_OFFSET;
+		hub[i]->vm_inv_eng0_ack =
+			SOC15_REG_OFFSET(MMHUB, 0,
+					 mmVML2VC0_VM_INVALIDATE_ENG0_ACK) +
+					 i * MMHUB_INSTANCE_REGISTER_OFFSET;
+		hub[i]->vm_context0_cntl =
+			SOC15_REG_OFFSET(MMHUB, 0,
+					 mmVML2VC0_VM_CONTEXT0_CNTL) +
+					 i * MMHUB_INSTANCE_REGISTER_OFFSET;
+		hub[i]->vm_l2_pro_fault_status =
+			SOC15_REG_OFFSET(MMHUB, 0,
+				    mmVML2PF0_VM_L2_PROTECTION_FAULT_STATUS) +
+				    i * MMHUB_INSTANCE_REGISTER_OFFSET;
+		hub[i]->vm_l2_pro_fault_cntl =
+			SOC15_REG_OFFSET(MMHUB, 0,
+				    mmVML2PF0_VM_L2_PROTECTION_FAULT_CNTL) +
+				    i * MMHUB_INSTANCE_REGISTER_OFFSET;
+	}
+}
diff --git a/drivers/gpu/drm/amd/amdgpu/mmhub_v9_4.h b/drivers/gpu/drm/amd/amdgpu/mmhub_v9_4.h
new file mode 100644
index 000000000000..9ba3dd808826
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/mmhub_v9_4.h
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2018 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+#ifndef __MMHUB_V9_4_H__
+#define __MMHUB_V9_4_H__
+
+u64 mmhub_v9_4_get_fb_location(struct amdgpu_device *adev);
+int mmhub_v9_4_gart_enable(struct amdgpu_device *adev);
+void mmhub_v9_4_gart_disable(struct amdgpu_device *adev);
+void mmhub_v9_4_set_fault_enable_default(struct amdgpu_device *adev,
+					 bool value);
+void mmhub_v9_4_init(struct amdgpu_device *adev);
+
+#endif