drivers/gpu/drm/amd/amdgpu/gfxhub_v1_0.c - linux - Git at Google

 /*
  * Copyright 2016 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 "gfxhub_v1_0.h"

 #include "gc/gc_9_0_offset.h"
 #include "gc/gc_9_0_sh_mask.h"
 #include "gc/gc_9_0_default.h"
 #include "vega10_enum.h"

 #include "soc15_common.h"

 u64 gfxhub_v1_0_get_mc_fb_offset(struct amdgpu_device *adev)
 {
 	return (u64)RREG32_SOC15(GC, 0, mmMC_VM_FB_OFFSET) << 24;
 }

 void gfxhub_v1_0_setup_vm_pt_regs(struct amdgpu_device *adev, uint32_t vmid,
 				uint64_t page_table_base)
 {
 	struct amdgpu_vmhub *hub = &adev->vmhub[AMDGPU_GFXHUB_0];

 	WREG32_SOC15_OFFSET(GC, 0, mmVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_LO32,
 			    hub->ctx_addr_distance * vmid,
 			    lower_32_bits(page_table_base));

 	WREG32_SOC15_OFFSET(GC, 0, mmVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_HI32,
 			    hub->ctx_addr_distance * vmid,
 			    upper_32_bits(page_table_base));
 }

 static void gfxhub_v1_0_init_gart_aperture_regs(struct amdgpu_device *adev)
 {
 	uint64_t pt_base = amdgpu_gmc_pd_addr(adev->gart.bo);

 	gfxhub_v1_0_setup_vm_pt_regs(adev, 0, pt_base);

 	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)
 {
 	uint64_t value;

 	/* Program the AGP BAR */
 	WREG32_SOC15_RLC(GC, 0, mmMC_VM_AGP_BASE, 0);
 	WREG32_SOC15_RLC(GC, 0, mmMC_VM_AGP_BOT, adev->gmc.agp_start >> 24);
 	WREG32_SOC15_RLC(GC, 0, mmMC_VM_AGP_TOP, adev->gmc.agp_end >> 24);

 	if (!amdgpu_sriov_vf(adev) || adev->asic_type <= CHIP_VEGA10) {
 		/* Program the system aperture low logical page number. */
 		WREG32_SOC15_RLC(GC, 0, mmMC_VM_SYSTEM_APERTURE_LOW_ADDR,
 			min(adev->gmc.fb_start, adev->gmc.agp_start) >> 18);

 		if (adev->apu_flags & AMD_APU_IS_RAVEN2)
 			/*
 			* Raven2 has a HW issue that it is unable to use the
 			* vram which is out of MC_VM_SYSTEM_APERTURE_HIGH_ADDR.
 			* So here is the workaround that increase system
 			* aperture high address (add 1) to get rid of the VM
 			* fault and hardware hang.
 			*/
 			WREG32_SOC15_RLC(GC, 0,
 					 mmMC_VM_SYSTEM_APERTURE_HIGH_ADDR,
 					 max((adev->gmc.fb_end >> 18) + 0x1,
 					     adev->gmc.agp_end >> 18));
 		else
 			WREG32_SOC15_RLC(
 				GC, 0, mmMC_VM_SYSTEM_APERTURE_HIGH_ADDR,
 				max(adev->gmc.fb_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(GC, 0, mmMC_VM_SYSTEM_APERTURE_DEFAULT_ADDR_LSB,
 			     (u32)(value >> 12));
 		WREG32_SOC15(GC, 0, mmMC_VM_SYSTEM_APERTURE_DEFAULT_ADDR_MSB,
 			     (u32)(value >> 44));

 		/* Program "protection fault". */
 		WREG32_SOC15(GC, 0, mmVM_L2_PROTECTION_FAULT_DEFAULT_ADDR_LO32,
 			     (u32)(adev->dummy_page_addr >> 12));
 		WREG32_SOC15(GC, 0, mmVM_L2_PROTECTION_FAULT_DEFAULT_ADDR_HI32,
 			     (u32)((u64)adev->dummy_page_addr >> 44));

 		WREG32_FIELD15(GC, 0, VM_L2_PROTECTION_FAULT_CNTL2,
 			       ACTIVE_PAGE_MIGRATION_PTE_READ_RETRY, 1);
 	}
 }

 static void gfxhub_v1_0_init_tlb_regs(struct amdgpu_device *adev)
 {
 	uint32_t tmp;

 	/* Setup TLB control */
 	tmp = RREG32_SOC15(GC, 0, mmMC_VM_MX_L1_TLB_CNTL);

 	tmp = REG_SET_FIELD(tmp, MC_VM_MX_L1_TLB_CNTL, ENABLE_L1_TLB, 1);
 	tmp = REG_SET_FIELD(tmp, MC_VM_MX_L1_TLB_CNTL, SYSTEM_ACCESS_MODE, 3);
 	tmp = REG_SET_FIELD(tmp, MC_VM_MX_L1_TLB_CNTL,
 			    ENABLE_ADVANCED_DRIVER_MODEL, 1);
 	tmp = REG_SET_FIELD(tmp, MC_VM_MX_L1_TLB_CNTL,
 			    SYSTEM_APERTURE_UNMAPPED_ACCESS, 0);
 	tmp = REG_SET_FIELD(tmp, MC_VM_MX_L1_TLB_CNTL, ECO_BITS, 0);
 	tmp = REG_SET_FIELD(tmp, MC_VM_MX_L1_TLB_CNTL,
 			    MTYPE, MTYPE_UC);/* XXX for emulation. */
 	tmp = REG_SET_FIELD(tmp, MC_VM_MX_L1_TLB_CNTL, ATC_EN, 1);

 	WREG32_SOC15_RLC(GC, 0, mmMC_VM_MX_L1_TLB_CNTL, tmp);
 }

 static void gfxhub_v1_0_init_cache_regs(struct amdgpu_device *adev)
 {
 	uint32_t tmp;

 	/* Setup L2 cache */
 	tmp = RREG32_SOC15(GC, 0, mmVM_L2_CNTL);
 	tmp = REG_SET_FIELD(tmp, VM_L2_CNTL, ENABLE_L2_CACHE, 1);
 	tmp = REG_SET_FIELD(tmp, VM_L2_CNTL, ENABLE_L2_FRAGMENT_PROCESSING, 1);
 	/* XXX for emulation, Refer to closed source code.*/
 	tmp = REG_SET_FIELD(tmp, VM_L2_CNTL, L2_PDE0_CACHE_TAG_GENERATION_MODE,
 			    0);
 	tmp = REG_SET_FIELD(tmp, VM_L2_CNTL, PDE_FAULT_CLASSIFICATION, 0);
 	tmp = REG_SET_FIELD(tmp, VM_L2_CNTL, CONTEXT1_IDENTITY_ACCESS_MODE, 1);
 	tmp = REG_SET_FIELD(tmp, VM_L2_CNTL, IDENTITY_MODE_FRAGMENT_SIZE, 0);
 	WREG32_SOC15_RLC(GC, 0, mmVM_L2_CNTL, tmp);

 	tmp = RREG32_SOC15(GC, 0, mmVM_L2_CNTL2);
 	tmp = REG_SET_FIELD(tmp, VM_L2_CNTL2, INVALIDATE_ALL_L1_TLBS, 1);
 	tmp = REG_SET_FIELD(tmp, VM_L2_CNTL2, INVALIDATE_L2_CACHE, 1);
 	WREG32_SOC15_RLC(GC, 0, mmVM_L2_CNTL2, tmp);

 	tmp = mmVM_L2_CNTL3_DEFAULT;
 	if (adev->gmc.translate_further) {
 		tmp = REG_SET_FIELD(tmp, VM_L2_CNTL3, BANK_SELECT, 12);
 		tmp = REG_SET_FIELD(tmp, VM_L2_CNTL3,
 				    L2_CACHE_BIGK_FRAGMENT_SIZE, 9);
 	} else {
 		tmp = REG_SET_FIELD(tmp, VM_L2_CNTL3, BANK_SELECT, 9);
 		tmp = REG_SET_FIELD(tmp, VM_L2_CNTL3,
 				    L2_CACHE_BIGK_FRAGMENT_SIZE, 6);
 	}
 	WREG32_SOC15_RLC(GC, 0, mmVM_L2_CNTL3, tmp);

 	tmp = mmVM_L2_CNTL4_DEFAULT;
 	tmp = REG_SET_FIELD(tmp, VM_L2_CNTL4, VMC_TAP_PDE_REQUEST_PHYSICAL, 0);
 	tmp = REG_SET_FIELD(tmp, VM_L2_CNTL4, VMC_TAP_PTE_REQUEST_PHYSICAL, 0);
 	WREG32_SOC15_RLC(GC, 0, mmVM_L2_CNTL4, tmp);
 }

 static void gfxhub_v1_0_enable_system_domain(struct amdgpu_device *adev)
 {
 	uint32_t tmp;

 	tmp = RREG32_SOC15(GC, 0, mmVM_CONTEXT0_CNTL);
 	tmp = REG_SET_FIELD(tmp, VM_CONTEXT0_CNTL, ENABLE_CONTEXT, 1);
 	tmp = REG_SET_FIELD(tmp, VM_CONTEXT0_CNTL, PAGE_TABLE_DEPTH, 0);
 	tmp = REG_SET_FIELD(tmp, VM_CONTEXT0_CNTL,
 			    RETRY_PERMISSION_OR_INVALID_PAGE_FAULT, 0);
 	WREG32_SOC15(GC, 0, mmVM_CONTEXT0_CNTL, tmp);
 }

 static void gfxhub_v1_0_disable_identity_aperture(struct amdgpu_device *adev)
 {
 	WREG32_SOC15(GC, 0, mmVM_L2_CONTEXT1_IDENTITY_APERTURE_LOW_ADDR_LO32,
 		     0XFFFFFFFF);
 	WREG32_SOC15(GC, 0, mmVM_L2_CONTEXT1_IDENTITY_APERTURE_LOW_ADDR_HI32,
 		     0x0000000F);

 	WREG32_SOC15(GC, 0, mmVM_L2_CONTEXT1_IDENTITY_APERTURE_HIGH_ADDR_LO32,
 		     0);
 	WREG32_SOC15(GC, 0, mmVM_L2_CONTEXT1_IDENTITY_APERTURE_HIGH_ADDR_HI32,
 		     0);

 	WREG32_SOC15(GC, 0, mmVM_L2_CONTEXT_IDENTITY_PHYSICAL_OFFSET_LO32, 0);
 	WREG32_SOC15(GC, 0, mmVM_L2_CONTEXT_IDENTITY_PHYSICAL_OFFSET_HI32, 0);

 }

 static void gfxhub_v1_0_setup_vmid_config(struct amdgpu_device *adev)
 {
 	struct amdgpu_vmhub *hub = &adev->vmhub[AMDGPU_GFXHUB_0];
 	unsigned num_level, block_size;
 	uint32_t tmp;
 	int i;

 	num_level = adev->vm_manager.num_level;
 	block_size = adev->vm_manager.block_size;
 	if (adev->gmc.translate_further)
 		num_level -= 1;
 	else
 		block_size -= 9;

 	for (i = 0; i <= 14; i++) {
 		tmp = RREG32_SOC15_OFFSET(GC, 0, mmVM_CONTEXT1_CNTL, i);
 		tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL, ENABLE_CONTEXT, 1);
 		tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL, PAGE_TABLE_DEPTH,
 				    num_level);
 		tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL,
 				    RANGE_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
 		tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL,
 				    DUMMY_PAGE_PROTECTION_FAULT_ENABLE_DEFAULT,
 				    1);
 		tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL,
 				    PDE0_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
 		tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL,
 				    VALID_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
 		tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL,
 				    READ_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
 		tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL,
 				    WRITE_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
 		tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL,
 				    EXECUTE_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
 		tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL,
 				    PAGE_TABLE_BLOCK_SIZE,
 				    block_size);
 		/* Send no-retry XNACK on fault to suppress VM fault storm. */
 		tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL,
 				    RETRY_PERMISSION_OR_INVALID_PAGE_FAULT,
 				    !adev->gmc.noretry);
 		WREG32_SOC15_OFFSET(GC, 0, mmVM_CONTEXT1_CNTL,
 				    i * hub->ctx_distance, tmp);
 		WREG32_SOC15_OFFSET(GC, 0, mmVM_CONTEXT1_PAGE_TABLE_START_ADDR_LO32,
 				    i * hub->ctx_addr_distance, 0);
 		WREG32_SOC15_OFFSET(GC, 0, mmVM_CONTEXT1_PAGE_TABLE_START_ADDR_HI32,
 				    i * hub->ctx_addr_distance, 0);
 		WREG32_SOC15_OFFSET(GC, 0, mmVM_CONTEXT1_PAGE_TABLE_END_ADDR_LO32,
 				    i * hub->ctx_addr_distance,
 				    lower_32_bits(adev->vm_manager.max_pfn - 1));
 		WREG32_SOC15_OFFSET(GC, 0, mmVM_CONTEXT1_PAGE_TABLE_END_ADDR_HI32,
 				    i * hub->ctx_addr_distance,
 				    upper_32_bits(adev->vm_manager.max_pfn - 1));
 	}
 }

 static void gfxhub_v1_0_program_invalidation(struct amdgpu_device *adev)
 {
 	struct amdgpu_vmhub *hub = &adev->vmhub[AMDGPU_GFXHUB_0];
 	unsigned i;

 	for (i = 0 ; i < 18; ++i) {
 		WREG32_SOC15_OFFSET(GC, 0, mmVM_INVALIDATE_ENG0_ADDR_RANGE_LO32,
 				    i * hub->eng_addr_distance, 0xffffffff);
 		WREG32_SOC15_OFFSET(GC, 0, mmVM_INVALIDATE_ENG0_ADDR_RANGE_HI32,
 				    i * hub->eng_addr_distance, 0x1f);
 	}
 }

 int gfxhub_v1_0_gart_enable(struct amdgpu_device *adev)
 {
 	if (amdgpu_sriov_vf(adev) && adev->asic_type != CHIP_ARCTURUS) {
 		/*
 		 * 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_RLC(GC, 0, mmMC_VM_FB_LOCATION_BASE,
 			     adev->gmc.vram_start >> 24);
 		WREG32_SOC15_RLC(GC, 0, mmMC_VM_FB_LOCATION_TOP,
 			     adev->gmc.vram_end >> 24);
 	}

 	/* GART Enable. */
 	gfxhub_v1_0_init_gart_aperture_regs(adev);
 	gfxhub_v1_0_init_system_aperture_regs(adev);
 	gfxhub_v1_0_init_tlb_regs(adev);
 	if (!amdgpu_sriov_vf(adev))
 		gfxhub_v1_0_init_cache_regs(adev);

 	gfxhub_v1_0_enable_system_domain(adev);
 	if (!amdgpu_sriov_vf(adev))
 		gfxhub_v1_0_disable_identity_aperture(adev);
 	gfxhub_v1_0_setup_vmid_config(adev);
 	gfxhub_v1_0_program_invalidation(adev);

 	return 0;
 }

 void gfxhub_v1_0_gart_disable(struct amdgpu_device *adev)
 {
 	struct amdgpu_vmhub *hub = &adev->vmhub[AMDGPU_GFXHUB_0];
 	u32 tmp;
 	u32 i;

 	/* Disable all tables */
 	for (i = 0; i < 16; i++)
 		WREG32_SOC15_OFFSET(GC, 0, mmVM_CONTEXT0_CNTL,
 				    i * hub->ctx_distance, 0);

 	/* Setup TLB control */
 	tmp = RREG32_SOC15(GC, 0, mmMC_VM_MX_L1_TLB_CNTL);
 	tmp = REG_SET_FIELD(tmp, MC_VM_MX_L1_TLB_CNTL, ENABLE_L1_TLB, 0);
 	tmp = REG_SET_FIELD(tmp,
 				MC_VM_MX_L1_TLB_CNTL,
 				ENABLE_ADVANCED_DRIVER_MODEL,
 				0);
 	WREG32_SOC15_RLC(GC, 0, mmMC_VM_MX_L1_TLB_CNTL, tmp);

 	/* Setup L2 cache */
 	WREG32_FIELD15(GC, 0, VM_L2_CNTL, ENABLE_L2_CACHE, 0);
 	WREG32_SOC15(GC, 0, mmVM_L2_CNTL3, 0);
 }

 /**
  * gfxhub_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 gfxhub_v1_0_set_fault_enable_default(struct amdgpu_device *adev,
 					  bool value)
 {
 	u32 tmp;
 	tmp = RREG32_SOC15(GC, 0, mmVM_L2_PROTECTION_FAULT_CNTL);
 	tmp = REG_SET_FIELD(tmp, VM_L2_PROTECTION_FAULT_CNTL,
 			RANGE_PROTECTION_FAULT_ENABLE_DEFAULT, value);
 	tmp = REG_SET_FIELD(tmp, VM_L2_PROTECTION_FAULT_CNTL,
 			PDE0_PROTECTION_FAULT_ENABLE_DEFAULT, value);
 	tmp = REG_SET_FIELD(tmp, VM_L2_PROTECTION_FAULT_CNTL,
 			PDE1_PROTECTION_FAULT_ENABLE_DEFAULT, value);
 	tmp = REG_SET_FIELD(tmp, VM_L2_PROTECTION_FAULT_CNTL,
 			PDE2_PROTECTION_FAULT_ENABLE_DEFAULT, value);
 	tmp = REG_SET_FIELD(tmp,
 			VM_L2_PROTECTION_FAULT_CNTL,
 			TRANSLATE_FURTHER_PROTECTION_FAULT_ENABLE_DEFAULT,
 			value);
 	tmp = REG_SET_FIELD(tmp, VM_L2_PROTECTION_FAULT_CNTL,
 			NACK_PROTECTION_FAULT_ENABLE_DEFAULT, value);
 	tmp = REG_SET_FIELD(tmp, VM_L2_PROTECTION_FAULT_CNTL,
 			DUMMY_PAGE_PROTECTION_FAULT_ENABLE_DEFAULT, value);
 	tmp = REG_SET_FIELD(tmp, VM_L2_PROTECTION_FAULT_CNTL,
 			VALID_PROTECTION_FAULT_ENABLE_DEFAULT, value);
 	tmp = REG_SET_FIELD(tmp, VM_L2_PROTECTION_FAULT_CNTL,
 			READ_PROTECTION_FAULT_ENABLE_DEFAULT, value);
 	tmp = REG_SET_FIELD(tmp, VM_L2_PROTECTION_FAULT_CNTL,
 			WRITE_PROTECTION_FAULT_ENABLE_DEFAULT, value);
 	tmp = REG_SET_FIELD(tmp, VM_L2_PROTECTION_FAULT_CNTL,
 			EXECUTE_PROTECTION_FAULT_ENABLE_DEFAULT, value);
 	if (!value) {
 		tmp = REG_SET_FIELD(tmp, VM_L2_PROTECTION_FAULT_CNTL,
 				CRASH_ON_NO_RETRY_FAULT, 1);
 		tmp = REG_SET_FIELD(tmp, VM_L2_PROTECTION_FAULT_CNTL,
 				CRASH_ON_RETRY_FAULT, 1);
 	}
 	WREG32_SOC15(GC, 0, mmVM_L2_PROTECTION_FAULT_CNTL, tmp);
 }

 void gfxhub_v1_0_init(struct amdgpu_device *adev)
 {
 	struct amdgpu_vmhub *hub = &adev->vmhub[AMDGPU_GFXHUB_0];

 	hub->ctx0_ptb_addr_lo32 =
 		SOC15_REG_OFFSET(GC, 0,
 				 mmVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_LO32);
 	hub->ctx0_ptb_addr_hi32 =
 		SOC15_REG_OFFSET(GC, 0,
 				 mmVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_HI32);
 	hub->vm_inv_eng0_sem =
 		SOC15_REG_OFFSET(GC, 0, mmVM_INVALIDATE_ENG0_SEM);
 	hub->vm_inv_eng0_req =
 		SOC15_REG_OFFSET(GC, 0, mmVM_INVALIDATE_ENG0_REQ);
 	hub->vm_inv_eng0_ack =
 		SOC15_REG_OFFSET(GC, 0, mmVM_INVALIDATE_ENG0_ACK);
 	hub->vm_context0_cntl =
 		SOC15_REG_OFFSET(GC, 0, mmVM_CONTEXT0_CNTL);
 	hub->vm_l2_pro_fault_status =
 		SOC15_REG_OFFSET(GC, 0, mmVM_L2_PROTECTION_FAULT_STATUS);
 	hub->vm_l2_pro_fault_cntl =
 		SOC15_REG_OFFSET(GC, 0, mmVM_L2_PROTECTION_FAULT_CNTL);

 	hub->ctx_distance = mmVM_CONTEXT1_CNTL - mmVM_CONTEXT0_CNTL;
 	hub->ctx_addr_distance = mmVM_CONTEXT1_PAGE_TABLE_BASE_ADDR_LO32 -
 		mmVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_LO32;
 	hub->eng_distance = mmVM_INVALIDATE_ENG1_REQ - mmVM_INVALIDATE_ENG0_REQ;
 	hub->eng_addr_distance = mmVM_INVALIDATE_ENG1_ADDR_RANGE_LO32 -
 		mmVM_INVALIDATE_ENG0_ADDR_RANGE_LO32;
 }


 const struct amdgpu_gfxhub_funcs gfxhub_v1_0_funcs = {
 	.get_mc_fb_offset = gfxhub_v1_0_get_mc_fb_offset,
 	.setup_vm_pt_regs = gfxhub_v1_0_setup_vm_pt_regs,
 	.gart_enable = gfxhub_v1_0_gart_enable,
 	.gart_disable = gfxhub_v1_0_gart_disable,
 	.set_fault_enable_default = gfxhub_v1_0_set_fault_enable_default,
 	.init = gfxhub_v1_0_init,
 };
	/*
	* Copyright 2016 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 "gfxhub_v1_0.h"

	#include "gc/gc_9_0_offset.h"
	#include "gc/gc_9_0_sh_mask.h"
	#include "gc/gc_9_0_default.h"
	#include "vega10_enum.h"

	#include "soc15_common.h"

	u64 gfxhub_v1_0_get_mc_fb_offset(struct amdgpu_device *adev)
	{
	return (u64)RREG32_SOC15(GC, 0, mmMC_VM_FB_OFFSET) << 24;
	}

	void gfxhub_v1_0_setup_vm_pt_regs(struct amdgpu_device *adev, uint32_t vmid,
	uint64_t page_table_base)
	{
	struct amdgpu_vmhub *hub = &adev->vmhub[AMDGPU_GFXHUB_0];

	WREG32_SOC15_OFFSET(GC, 0, mmVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_LO32,
	hub->ctx_addr_distance * vmid,
	lower_32_bits(page_table_base));

	WREG32_SOC15_OFFSET(GC, 0, mmVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_HI32,
	hub->ctx_addr_distance * vmid,
	upper_32_bits(page_table_base));
	}

	static void gfxhub_v1_0_init_gart_aperture_regs(struct amdgpu_device *adev)
	{
	uint64_t pt_base = amdgpu_gmc_pd_addr(adev->gart.bo);

	gfxhub_v1_0_setup_vm_pt_regs(adev, 0, pt_base);

	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)
	{
	uint64_t value;

	/* Program the AGP BAR */
	WREG32_SOC15_RLC(GC, 0, mmMC_VM_AGP_BASE, 0);
	WREG32_SOC15_RLC(GC, 0, mmMC_VM_AGP_BOT, adev->gmc.agp_start >> 24);
	WREG32_SOC15_RLC(GC, 0, mmMC_VM_AGP_TOP, adev->gmc.agp_end >> 24);

	if (!amdgpu_sriov_vf(adev) \|\| adev->asic_type <= CHIP_VEGA10) {
	/* Program the system aperture low logical page number. */
	WREG32_SOC15_RLC(GC, 0, mmMC_VM_SYSTEM_APERTURE_LOW_ADDR,
	min(adev->gmc.fb_start, adev->gmc.agp_start) >> 18);

	if (adev->apu_flags & AMD_APU_IS_RAVEN2)
	/*
	* Raven2 has a HW issue that it is unable to use the
	* vram which is out of MC_VM_SYSTEM_APERTURE_HIGH_ADDR.
	* So here is the workaround that increase system
	* aperture high address (add 1) to get rid of the VM
	* fault and hardware hang.
	*/
	WREG32_SOC15_RLC(GC, 0,
	mmMC_VM_SYSTEM_APERTURE_HIGH_ADDR,
	max((adev->gmc.fb_end >> 18) + 0x1,
	adev->gmc.agp_end >> 18));
	else
	WREG32_SOC15_RLC(
	GC, 0, mmMC_VM_SYSTEM_APERTURE_HIGH_ADDR,
	max(adev->gmc.fb_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(GC, 0, mmMC_VM_SYSTEM_APERTURE_DEFAULT_ADDR_LSB,
	(u32)(value >> 12));
	WREG32_SOC15(GC, 0, mmMC_VM_SYSTEM_APERTURE_DEFAULT_ADDR_MSB,
	(u32)(value >> 44));

	/* Program "protection fault". */
	WREG32_SOC15(GC, 0, mmVM_L2_PROTECTION_FAULT_DEFAULT_ADDR_LO32,
	(u32)(adev->dummy_page_addr >> 12));
	WREG32_SOC15(GC, 0, mmVM_L2_PROTECTION_FAULT_DEFAULT_ADDR_HI32,
	(u32)((u64)adev->dummy_page_addr >> 44));

	WREG32_FIELD15(GC, 0, VM_L2_PROTECTION_FAULT_CNTL2,
	ACTIVE_PAGE_MIGRATION_PTE_READ_RETRY, 1);
	}
	}

	static void gfxhub_v1_0_init_tlb_regs(struct amdgpu_device *adev)
	{
	uint32_t tmp;

	/* Setup TLB control */
	tmp = RREG32_SOC15(GC, 0, mmMC_VM_MX_L1_TLB_CNTL);

	tmp = REG_SET_FIELD(tmp, MC_VM_MX_L1_TLB_CNTL, ENABLE_L1_TLB, 1);
	tmp = REG_SET_FIELD(tmp, MC_VM_MX_L1_TLB_CNTL, SYSTEM_ACCESS_MODE, 3);
	tmp = REG_SET_FIELD(tmp, MC_VM_MX_L1_TLB_CNTL,
	ENABLE_ADVANCED_DRIVER_MODEL, 1);
	tmp = REG_SET_FIELD(tmp, MC_VM_MX_L1_TLB_CNTL,
	SYSTEM_APERTURE_UNMAPPED_ACCESS, 0);
	tmp = REG_SET_FIELD(tmp, MC_VM_MX_L1_TLB_CNTL, ECO_BITS, 0);
	tmp = REG_SET_FIELD(tmp, MC_VM_MX_L1_TLB_CNTL,
	MTYPE, MTYPE_UC);/* XXX for emulation. */
	tmp = REG_SET_FIELD(tmp, MC_VM_MX_L1_TLB_CNTL, ATC_EN, 1);

	WREG32_SOC15_RLC(GC, 0, mmMC_VM_MX_L1_TLB_CNTL, tmp);
	}

	static void gfxhub_v1_0_init_cache_regs(struct amdgpu_device *adev)
	{
	uint32_t tmp;

	/* Setup L2 cache */
	tmp = RREG32_SOC15(GC, 0, mmVM_L2_CNTL);
	tmp = REG_SET_FIELD(tmp, VM_L2_CNTL, ENABLE_L2_CACHE, 1);
	tmp = REG_SET_FIELD(tmp, VM_L2_CNTL, ENABLE_L2_FRAGMENT_PROCESSING, 1);
	/* XXX for emulation, Refer to closed source code.*/
	tmp = REG_SET_FIELD(tmp, VM_L2_CNTL, L2_PDE0_CACHE_TAG_GENERATION_MODE,
	0);
	tmp = REG_SET_FIELD(tmp, VM_L2_CNTL, PDE_FAULT_CLASSIFICATION, 0);
	tmp = REG_SET_FIELD(tmp, VM_L2_CNTL, CONTEXT1_IDENTITY_ACCESS_MODE, 1);
	tmp = REG_SET_FIELD(tmp, VM_L2_CNTL, IDENTITY_MODE_FRAGMENT_SIZE, 0);
	WREG32_SOC15_RLC(GC, 0, mmVM_L2_CNTL, tmp);

	tmp = RREG32_SOC15(GC, 0, mmVM_L2_CNTL2);
	tmp = REG_SET_FIELD(tmp, VM_L2_CNTL2, INVALIDATE_ALL_L1_TLBS, 1);
	tmp = REG_SET_FIELD(tmp, VM_L2_CNTL2, INVALIDATE_L2_CACHE, 1);
	WREG32_SOC15_RLC(GC, 0, mmVM_L2_CNTL2, tmp);

	tmp = mmVM_L2_CNTL3_DEFAULT;
	if (adev->gmc.translate_further) {
	tmp = REG_SET_FIELD(tmp, VM_L2_CNTL3, BANK_SELECT, 12);
	tmp = REG_SET_FIELD(tmp, VM_L2_CNTL3,
	L2_CACHE_BIGK_FRAGMENT_SIZE, 9);
	} else {
	tmp = REG_SET_FIELD(tmp, VM_L2_CNTL3, BANK_SELECT, 9);
	tmp = REG_SET_FIELD(tmp, VM_L2_CNTL3,
	L2_CACHE_BIGK_FRAGMENT_SIZE, 6);
	}
	WREG32_SOC15_RLC(GC, 0, mmVM_L2_CNTL3, tmp);

	tmp = mmVM_L2_CNTL4_DEFAULT;
	tmp = REG_SET_FIELD(tmp, VM_L2_CNTL4, VMC_TAP_PDE_REQUEST_PHYSICAL, 0);
	tmp = REG_SET_FIELD(tmp, VM_L2_CNTL4, VMC_TAP_PTE_REQUEST_PHYSICAL, 0);
	WREG32_SOC15_RLC(GC, 0, mmVM_L2_CNTL4, tmp);
	}

	static void gfxhub_v1_0_enable_system_domain(struct amdgpu_device *adev)
	{
	uint32_t tmp;

	tmp = RREG32_SOC15(GC, 0, mmVM_CONTEXT0_CNTL);
	tmp = REG_SET_FIELD(tmp, VM_CONTEXT0_CNTL, ENABLE_CONTEXT, 1);
	tmp = REG_SET_FIELD(tmp, VM_CONTEXT0_CNTL, PAGE_TABLE_DEPTH, 0);
	tmp = REG_SET_FIELD(tmp, VM_CONTEXT0_CNTL,
	RETRY_PERMISSION_OR_INVALID_PAGE_FAULT, 0);
	WREG32_SOC15(GC, 0, mmVM_CONTEXT0_CNTL, tmp);
	}

	static void gfxhub_v1_0_disable_identity_aperture(struct amdgpu_device *adev)
	{
	WREG32_SOC15(GC, 0, mmVM_L2_CONTEXT1_IDENTITY_APERTURE_LOW_ADDR_LO32,
	0XFFFFFFFF);
	WREG32_SOC15(GC, 0, mmVM_L2_CONTEXT1_IDENTITY_APERTURE_LOW_ADDR_HI32,
	0x0000000F);

	WREG32_SOC15(GC, 0, mmVM_L2_CONTEXT1_IDENTITY_APERTURE_HIGH_ADDR_LO32,
	0);
	WREG32_SOC15(GC, 0, mmVM_L2_CONTEXT1_IDENTITY_APERTURE_HIGH_ADDR_HI32,
	0);

	WREG32_SOC15(GC, 0, mmVM_L2_CONTEXT_IDENTITY_PHYSICAL_OFFSET_LO32, 0);
	WREG32_SOC15(GC, 0, mmVM_L2_CONTEXT_IDENTITY_PHYSICAL_OFFSET_HI32, 0);

	}

	static void gfxhub_v1_0_setup_vmid_config(struct amdgpu_device *adev)
	{
	struct amdgpu_vmhub *hub = &adev->vmhub[AMDGPU_GFXHUB_0];
	unsigned num_level, block_size;
	uint32_t tmp;
	int i;

	num_level = adev->vm_manager.num_level;
	block_size = adev->vm_manager.block_size;
	if (adev->gmc.translate_further)
	num_level -= 1;
	else
	block_size -= 9;

	for (i = 0; i <= 14; i++) {
	tmp = RREG32_SOC15_OFFSET(GC, 0, mmVM_CONTEXT1_CNTL, i);
	tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL, ENABLE_CONTEXT, 1);
	tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL, PAGE_TABLE_DEPTH,
	num_level);
	tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL,
	RANGE_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
	tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL,
	DUMMY_PAGE_PROTECTION_FAULT_ENABLE_DEFAULT,
	1);
	tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL,
	PDE0_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
	tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL,
	VALID_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
	tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL,
	READ_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
	tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL,
	WRITE_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
	tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL,
	EXECUTE_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
	tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL,
	PAGE_TABLE_BLOCK_SIZE,
	block_size);
	/* Send no-retry XNACK on fault to suppress VM fault storm. */
	tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL,
	RETRY_PERMISSION_OR_INVALID_PAGE_FAULT,
	!adev->gmc.noretry);
	WREG32_SOC15_OFFSET(GC, 0, mmVM_CONTEXT1_CNTL,
	i * hub->ctx_distance, tmp);
	WREG32_SOC15_OFFSET(GC, 0, mmVM_CONTEXT1_PAGE_TABLE_START_ADDR_LO32,
	i * hub->ctx_addr_distance, 0);
	WREG32_SOC15_OFFSET(GC, 0, mmVM_CONTEXT1_PAGE_TABLE_START_ADDR_HI32,
	i * hub->ctx_addr_distance, 0);
	WREG32_SOC15_OFFSET(GC, 0, mmVM_CONTEXT1_PAGE_TABLE_END_ADDR_LO32,
	i * hub->ctx_addr_distance,
	lower_32_bits(adev->vm_manager.max_pfn - 1));
	WREG32_SOC15_OFFSET(GC, 0, mmVM_CONTEXT1_PAGE_TABLE_END_ADDR_HI32,
	i * hub->ctx_addr_distance,
	upper_32_bits(adev->vm_manager.max_pfn - 1));
	}
	}

	static void gfxhub_v1_0_program_invalidation(struct amdgpu_device *adev)
	{
	struct amdgpu_vmhub *hub = &adev->vmhub[AMDGPU_GFXHUB_0];
	unsigned i;

	for (i = 0 ; i < 18; ++i) {
	WREG32_SOC15_OFFSET(GC, 0, mmVM_INVALIDATE_ENG0_ADDR_RANGE_LO32,
	i * hub->eng_addr_distance, 0xffffffff);
	WREG32_SOC15_OFFSET(GC, 0, mmVM_INVALIDATE_ENG0_ADDR_RANGE_HI32,
	i * hub->eng_addr_distance, 0x1f);
	}
	}

	int gfxhub_v1_0_gart_enable(struct amdgpu_device *adev)
	{
	if (amdgpu_sriov_vf(adev) && adev->asic_type != CHIP_ARCTURUS) {
	/*
	* 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_RLC(GC, 0, mmMC_VM_FB_LOCATION_BASE,
	adev->gmc.vram_start >> 24);
	WREG32_SOC15_RLC(GC, 0, mmMC_VM_FB_LOCATION_TOP,
	adev->gmc.vram_end >> 24);
	}

	/* GART Enable. */
	gfxhub_v1_0_init_gart_aperture_regs(adev);
	gfxhub_v1_0_init_system_aperture_regs(adev);
	gfxhub_v1_0_init_tlb_regs(adev);
	if (!amdgpu_sriov_vf(adev))
	gfxhub_v1_0_init_cache_regs(adev);

	gfxhub_v1_0_enable_system_domain(adev);
	if (!amdgpu_sriov_vf(adev))
	gfxhub_v1_0_disable_identity_aperture(adev);
	gfxhub_v1_0_setup_vmid_config(adev);
	gfxhub_v1_0_program_invalidation(adev);

	return 0;
	}

	void gfxhub_v1_0_gart_disable(struct amdgpu_device *adev)
	{
	struct amdgpu_vmhub *hub = &adev->vmhub[AMDGPU_GFXHUB_0];
	u32 tmp;
	u32 i;

	/* Disable all tables */
	for (i = 0; i < 16; i++)
	WREG32_SOC15_OFFSET(GC, 0, mmVM_CONTEXT0_CNTL,
	i * hub->ctx_distance, 0);

	/* Setup TLB control */
	tmp = RREG32_SOC15(GC, 0, mmMC_VM_MX_L1_TLB_CNTL);
	tmp = REG_SET_FIELD(tmp, MC_VM_MX_L1_TLB_CNTL, ENABLE_L1_TLB, 0);
	tmp = REG_SET_FIELD(tmp,
	MC_VM_MX_L1_TLB_CNTL,
	ENABLE_ADVANCED_DRIVER_MODEL,
	0);
	WREG32_SOC15_RLC(GC, 0, mmMC_VM_MX_L1_TLB_CNTL, tmp);

	/* Setup L2 cache */
	WREG32_FIELD15(GC, 0, VM_L2_CNTL, ENABLE_L2_CACHE, 0);
	WREG32_SOC15(GC, 0, mmVM_L2_CNTL3, 0);
	}

	/**
	* gfxhub_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 gfxhub_v1_0_set_fault_enable_default(struct amdgpu_device *adev,
	bool value)
	{
	u32 tmp;
	tmp = RREG32_SOC15(GC, 0, mmVM_L2_PROTECTION_FAULT_CNTL);
	tmp = REG_SET_FIELD(tmp, VM_L2_PROTECTION_FAULT_CNTL,
	RANGE_PROTECTION_FAULT_ENABLE_DEFAULT, value);
	tmp = REG_SET_FIELD(tmp, VM_L2_PROTECTION_FAULT_CNTL,
	PDE0_PROTECTION_FAULT_ENABLE_DEFAULT, value);
	tmp = REG_SET_FIELD(tmp, VM_L2_PROTECTION_FAULT_CNTL,
	PDE1_PROTECTION_FAULT_ENABLE_DEFAULT, value);
	tmp = REG_SET_FIELD(tmp, VM_L2_PROTECTION_FAULT_CNTL,
	PDE2_PROTECTION_FAULT_ENABLE_DEFAULT, value);
	tmp = REG_SET_FIELD(tmp,
	VM_L2_PROTECTION_FAULT_CNTL,
	TRANSLATE_FURTHER_PROTECTION_FAULT_ENABLE_DEFAULT,
	value);
	tmp = REG_SET_FIELD(tmp, VM_L2_PROTECTION_FAULT_CNTL,
	NACK_PROTECTION_FAULT_ENABLE_DEFAULT, value);
	tmp = REG_SET_FIELD(tmp, VM_L2_PROTECTION_FAULT_CNTL,
	DUMMY_PAGE_PROTECTION_FAULT_ENABLE_DEFAULT, value);
	tmp = REG_SET_FIELD(tmp, VM_L2_PROTECTION_FAULT_CNTL,
	VALID_PROTECTION_FAULT_ENABLE_DEFAULT, value);
	tmp = REG_SET_FIELD(tmp, VM_L2_PROTECTION_FAULT_CNTL,
	READ_PROTECTION_FAULT_ENABLE_DEFAULT, value);
	tmp = REG_SET_FIELD(tmp, VM_L2_PROTECTION_FAULT_CNTL,
	WRITE_PROTECTION_FAULT_ENABLE_DEFAULT, value);
	tmp = REG_SET_FIELD(tmp, VM_L2_PROTECTION_FAULT_CNTL,
	EXECUTE_PROTECTION_FAULT_ENABLE_DEFAULT, value);
	if (!value) {
	tmp = REG_SET_FIELD(tmp, VM_L2_PROTECTION_FAULT_CNTL,
	CRASH_ON_NO_RETRY_FAULT, 1);
	tmp = REG_SET_FIELD(tmp, VM_L2_PROTECTION_FAULT_CNTL,
	CRASH_ON_RETRY_FAULT, 1);
	}
	WREG32_SOC15(GC, 0, mmVM_L2_PROTECTION_FAULT_CNTL, tmp);
	}

	void gfxhub_v1_0_init(struct amdgpu_device *adev)
	{
	struct amdgpu_vmhub *hub = &adev->vmhub[AMDGPU_GFXHUB_0];

	hub->ctx0_ptb_addr_lo32 =
	SOC15_REG_OFFSET(GC, 0,
	mmVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_LO32);
	hub->ctx0_ptb_addr_hi32 =
	SOC15_REG_OFFSET(GC, 0,
	mmVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_HI32);
	hub->vm_inv_eng0_sem =
	SOC15_REG_OFFSET(GC, 0, mmVM_INVALIDATE_ENG0_SEM);
	hub->vm_inv_eng0_req =
	SOC15_REG_OFFSET(GC, 0, mmVM_INVALIDATE_ENG0_REQ);
	hub->vm_inv_eng0_ack =
	SOC15_REG_OFFSET(GC, 0, mmVM_INVALIDATE_ENG0_ACK);
	hub->vm_context0_cntl =
	SOC15_REG_OFFSET(GC, 0, mmVM_CONTEXT0_CNTL);
	hub->vm_l2_pro_fault_status =
	SOC15_REG_OFFSET(GC, 0, mmVM_L2_PROTECTION_FAULT_STATUS);
	hub->vm_l2_pro_fault_cntl =
	SOC15_REG_OFFSET(GC, 0, mmVM_L2_PROTECTION_FAULT_CNTL);

	hub->ctx_distance = mmVM_CONTEXT1_CNTL - mmVM_CONTEXT0_CNTL;
	hub->ctx_addr_distance = mmVM_CONTEXT1_PAGE_TABLE_BASE_ADDR_LO32 -
	mmVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_LO32;
	hub->eng_distance = mmVM_INVALIDATE_ENG1_REQ - mmVM_INVALIDATE_ENG0_REQ;
	hub->eng_addr_distance = mmVM_INVALIDATE_ENG1_ADDR_RANGE_LO32 -
	mmVM_INVALIDATE_ENG0_ADDR_RANGE_LO32;
	}


	const struct amdgpu_gfxhub_funcs gfxhub_v1_0_funcs = {
	.get_mc_fb_offset = gfxhub_v1_0_get_mc_fb_offset,
	.setup_vm_pt_regs = gfxhub_v1_0_setup_vm_pt_regs,
	.gart_enable = gfxhub_v1_0_gart_enable,
	.gart_disable = gfxhub_v1_0_gart_disable,
	.set_fault_enable_default = gfxhub_v1_0_set_fault_enable_default,
	.init = gfxhub_v1_0_init,
	};