drivers/gpu/drm/amd/amdgpu/gfxhub_v2_0.c - linux/torvalds/linux - Git at Google

 /*
  * Copyright 2019 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_v2_0.h"

 #include "gc/gc_10_1_0_offset.h"
 #include "gc/gc_10_1_0_sh_mask.h"
 #include "gc/gc_10_1_0_default.h"
 #include "navi10_enum.h"

 #include "soc15_common.h"

 u64 gfxhub_v2_0_get_fb_location(struct amdgpu_device *adev)
 {
 	u64 base = RREG32_SOC15(GC, 0, mmGCMC_VM_FB_LOCATION_BASE);

 	base &= GCMC_VM_FB_LOCATION_BASE__FB_BASE_MASK;
 	base <<= 24;

 	return base;
 }

 u64 gfxhub_v2_0_get_mc_fb_offset(struct amdgpu_device *adev)
 {
 	return (u64)RREG32_SOC15(GC, 0, mmGCMC_VM_FB_OFFSET) << 24;
 }

 static void gfxhub_v2_0_init_gart_pt_regs(struct amdgpu_device *adev)
 {
 	uint64_t value = amdgpu_gmc_pd_addr(adev->gart.bo);


 	WREG32_SOC15(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_LO32,
 		     lower_32_bits(value));

 	WREG32_SOC15(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_HI32,
 		     upper_32_bits(value));
 }

 static void gfxhub_v2_0_init_gart_aperture_regs(struct amdgpu_device *adev)
 {
 	gfxhub_v2_0_init_gart_pt_regs(adev);

 	WREG32_SOC15(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_START_ADDR_LO32,
 		     (u32)(adev->gmc.gart_start >> 12));
 	WREG32_SOC15(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_START_ADDR_HI32,
 		     (u32)(adev->gmc.gart_start >> 44));

 	WREG32_SOC15(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_END_ADDR_LO32,
 		     (u32)(adev->gmc.gart_end >> 12));
 	WREG32_SOC15(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_END_ADDR_HI32,
 		     (u32)(adev->gmc.gart_end >> 44));
 }

 static void gfxhub_v2_0_init_system_aperture_regs(struct amdgpu_device *adev)
 {
 	uint64_t value;

 	/* Disable AGP. */
 	WREG32_SOC15(GC, 0, mmGCMC_VM_AGP_BASE, 0);
 	WREG32_SOC15(GC, 0, mmGCMC_VM_AGP_TOP, 0);
 	WREG32_SOC15(GC, 0, mmGCMC_VM_AGP_BOT, 0x00FFFFFF);

 	/* Program the system aperture low logical page number. */
 	WREG32_SOC15(GC, 0, mmGCMC_VM_SYSTEM_APERTURE_LOW_ADDR,
 		     adev->gmc.vram_start >> 18);
 	WREG32_SOC15(GC, 0, mmGCMC_VM_SYSTEM_APERTURE_HIGH_ADDR,
 		     adev->gmc.vram_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, mmGCMC_VM_SYSTEM_APERTURE_DEFAULT_ADDR_LSB,
 		     (u32)(value >> 12));
 	WREG32_SOC15(GC, 0, mmGCMC_VM_SYSTEM_APERTURE_DEFAULT_ADDR_MSB,
 		     (u32)(value >> 44));

 	/* Program "protection fault". */
 	WREG32_SOC15(GC, 0, mmGCVM_L2_PROTECTION_FAULT_DEFAULT_ADDR_LO32,
 		     (u32)(adev->dummy_page_addr >> 12));
 	WREG32_SOC15(GC, 0, mmGCVM_L2_PROTECTION_FAULT_DEFAULT_ADDR_HI32,
 		     (u32)((u64)adev->dummy_page_addr >> 44));

 	WREG32_FIELD15(GC, 0, GCVM_L2_PROTECTION_FAULT_CNTL2,
 		       ACTIVE_PAGE_MIGRATION_PTE_READ_RETRY, 1);
 }


 static void gfxhub_v2_0_init_tlb_regs(struct amdgpu_device *adev)
 {
 	uint32_t tmp;

 	/* Setup TLB control */
 	tmp = RREG32_SOC15(GC, 0, mmGCMC_VM_MX_L1_TLB_CNTL);

 	tmp = REG_SET_FIELD(tmp, GCMC_VM_MX_L1_TLB_CNTL, ENABLE_L1_TLB, 1);
 	tmp = REG_SET_FIELD(tmp, GCMC_VM_MX_L1_TLB_CNTL, SYSTEM_ACCESS_MODE, 3);
 	tmp = REG_SET_FIELD(tmp, GCMC_VM_MX_L1_TLB_CNTL,
 			    ENABLE_ADVANCED_DRIVER_MODEL, 1);
 	tmp = REG_SET_FIELD(tmp, GCMC_VM_MX_L1_TLB_CNTL,
 			    SYSTEM_APERTURE_UNMAPPED_ACCESS, 0);
 	tmp = REG_SET_FIELD(tmp, GCMC_VM_MX_L1_TLB_CNTL, ECO_BITS, 0);
 	tmp = REG_SET_FIELD(tmp, GCMC_VM_MX_L1_TLB_CNTL,
 			    MTYPE, MTYPE_UC); /* UC, uncached */

 	WREG32_SOC15(GC, 0, mmGCMC_VM_MX_L1_TLB_CNTL, tmp);
 }

 static void gfxhub_v2_0_init_cache_regs(struct amdgpu_device *adev)
 {
 	uint32_t tmp;

 	/* Setup L2 cache */
 	tmp = RREG32_SOC15(GC, 0, mmGCVM_L2_CNTL);
 	tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL, ENABLE_L2_CACHE, 1);
 	tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL, ENABLE_L2_FRAGMENT_PROCESSING, 0);
 	tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL,
 			    ENABLE_DEFAULT_PAGE_OUT_TO_SYSTEM_MEMORY, 1);
 	/* XXX for emulation, Refer to closed source code.*/
 	tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL,
 			    L2_PDE0_CACHE_TAG_GENERATION_MODE, 0);
 	tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL, PDE_FAULT_CLASSIFICATION, 0);
 	tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL, CONTEXT1_IDENTITY_ACCESS_MODE, 1);
 	tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL, IDENTITY_MODE_FRAGMENT_SIZE, 0);
 	WREG32_SOC15(GC, 0, mmGCVM_L2_CNTL, tmp);

 	tmp = RREG32_SOC15(GC, 0, mmGCVM_L2_CNTL2);
 	tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL2, INVALIDATE_ALL_L1_TLBS, 1);
 	tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL2, INVALIDATE_L2_CACHE, 1);
 	WREG32_SOC15(GC, 0, mmGCVM_L2_CNTL2, tmp);

 	tmp = mmGCVM_L2_CNTL3_DEFAULT;
 	WREG32_SOC15(GC, 0, mmGCVM_L2_CNTL3, tmp);

 	tmp = mmGCVM_L2_CNTL4_DEFAULT;
 	tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL4, VMC_TAP_PDE_REQUEST_PHYSICAL, 0);
 	tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL4, VMC_TAP_PTE_REQUEST_PHYSICAL, 0);
 	WREG32_SOC15(GC, 0, mmGCVM_L2_CNTL4, tmp);
 }

 static void gfxhub_v2_0_enable_system_domain(struct amdgpu_device *adev)
 {
 	uint32_t tmp;

 	tmp = RREG32_SOC15(GC, 0, mmGCVM_CONTEXT0_CNTL);
 	tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT0_CNTL, ENABLE_CONTEXT, 1);
 	tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT0_CNTL, PAGE_TABLE_DEPTH, 0);
 	WREG32_SOC15(GC, 0, mmGCVM_CONTEXT0_CNTL, tmp);
 }

 static void gfxhub_v2_0_disable_identity_aperture(struct amdgpu_device *adev)
 {
 	WREG32_SOC15(GC, 0, mmGCVM_L2_CONTEXT1_IDENTITY_APERTURE_LOW_ADDR_LO32,
 		     0xFFFFFFFF);
 	WREG32_SOC15(GC, 0, mmGCVM_L2_CONTEXT1_IDENTITY_APERTURE_LOW_ADDR_HI32,
 		     0x0000000F);

 	WREG32_SOC15(GC, 0, mmGCVM_L2_CONTEXT1_IDENTITY_APERTURE_HIGH_ADDR_LO32,
 		     0);
 	WREG32_SOC15(GC, 0, mmGCVM_L2_CONTEXT1_IDENTITY_APERTURE_HIGH_ADDR_HI32,
 		     0);

 	WREG32_SOC15(GC, 0, mmGCVM_L2_CONTEXT_IDENTITY_PHYSICAL_OFFSET_LO32, 0);
 	WREG32_SOC15(GC, 0, mmGCVM_L2_CONTEXT_IDENTITY_PHYSICAL_OFFSET_HI32, 0);

 }

 static void gfxhub_v2_0_setup_vmid_config(struct amdgpu_device *adev)
 {
 	int i;
 	uint32_t tmp;

 	for (i = 0; i <= 14; i++) {
 		tmp = RREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT1_CNTL, i);
 		tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT1_CNTL, ENABLE_CONTEXT, 1);
 		tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT1_CNTL, PAGE_TABLE_DEPTH,
 				    adev->vm_manager.num_level);
 		tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT1_CNTL,
 				RANGE_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
 		tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT1_CNTL,
 				DUMMY_PAGE_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
 		tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT1_CNTL,
 				PDE0_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
 		tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT1_CNTL,
 				VALID_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
 		tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT1_CNTL,
 				READ_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
 		tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT1_CNTL,
 				WRITE_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
 		tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT1_CNTL,
 				EXECUTE_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
 		tmp = REG_SET_FIELD(tmp, GCVM_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, GCVM_CONTEXT1_CNTL,
 				    RETRY_PERMISSION_OR_INVALID_PAGE_FAULT,
 				    !amdgpu_noretry);
 		WREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT1_CNTL, i, tmp);
 		WREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT1_PAGE_TABLE_START_ADDR_LO32, i*2, 0);
 		WREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT1_PAGE_TABLE_START_ADDR_HI32, i*2, 0);
 		WREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT1_PAGE_TABLE_END_ADDR_LO32,  i*2,
 			lower_32_bits(adev->vm_manager.max_pfn - 1));
 		WREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT1_PAGE_TABLE_END_ADDR_HI32, i*2,
 			upper_32_bits(adev->vm_manager.max_pfn - 1));
 	}
 }

 static void gfxhub_v2_0_program_invalidation(struct amdgpu_device *adev)
 {
 	unsigned i;

 	for (i = 0 ; i < 18; ++i) {
 		WREG32_SOC15_OFFSET(GC, 0, mmGCVM_INVALIDATE_ENG0_ADDR_RANGE_LO32,
 				    2 * i, 0xffffffff);
 		WREG32_SOC15_OFFSET(GC, 0, mmGCVM_INVALIDATE_ENG0_ADDR_RANGE_HI32,
 				    2 * i, 0x1f);
 	}
 }

 int gfxhub_v2_0_gart_enable(struct amdgpu_device *adev)
 {
 	if (amdgpu_sriov_vf(adev)) {
 		/*
 		 * GCMC_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(GC, 0, mmGCMC_VM_FB_LOCATION_BASE,
 			     adev->gmc.vram_start >> 24);
 		WREG32_SOC15(GC, 0, mmGCMC_VM_FB_LOCATION_TOP,
 			     adev->gmc.vram_end >> 24);
 	}

 	/* GART Enable. */
 	gfxhub_v2_0_init_gart_aperture_regs(adev);
 	gfxhub_v2_0_init_system_aperture_regs(adev);
 	gfxhub_v2_0_init_tlb_regs(adev);
 	gfxhub_v2_0_init_cache_regs(adev);

 	gfxhub_v2_0_enable_system_domain(adev);
 	gfxhub_v2_0_disable_identity_aperture(adev);
 	gfxhub_v2_0_setup_vmid_config(adev);
 	gfxhub_v2_0_program_invalidation(adev);

 	return 0;
 }

 void gfxhub_v2_0_gart_disable(struct amdgpu_device *adev)
 {
 	u32 tmp;
 	u32 i;

 	/* Disable all tables */
 	for (i = 0; i < 16; i++)
 		WREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT0_CNTL, i, 0);

 	/* Setup TLB control */
 	tmp = RREG32_SOC15(GC, 0, mmGCMC_VM_MX_L1_TLB_CNTL);
 	tmp = REG_SET_FIELD(tmp, GCMC_VM_MX_L1_TLB_CNTL, ENABLE_L1_TLB, 0);
 	tmp = REG_SET_FIELD(tmp, GCMC_VM_MX_L1_TLB_CNTL,
 			    ENABLE_ADVANCED_DRIVER_MODEL, 0);
 	WREG32_SOC15(GC, 0, mmGCMC_VM_MX_L1_TLB_CNTL, tmp);

 	/* Setup L2 cache */
 	WREG32_FIELD15(GC, 0, GCVM_L2_CNTL, ENABLE_L2_CACHE, 0);
 	WREG32_SOC15(GC, 0, mmGCVM_L2_CNTL3, 0);
 }

 /**
  * gfxhub_v2_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_v2_0_set_fault_enable_default(struct amdgpu_device *adev,
 					  bool value)
 {
 	u32 tmp;
 	tmp = RREG32_SOC15(GC, 0, mmGCVM_L2_PROTECTION_FAULT_CNTL);
 	tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
 			    RANGE_PROTECTION_FAULT_ENABLE_DEFAULT, value);
 	tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
 			    PDE0_PROTECTION_FAULT_ENABLE_DEFAULT, value);
 	tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
 			    PDE1_PROTECTION_FAULT_ENABLE_DEFAULT, value);
 	tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
 			    PDE2_PROTECTION_FAULT_ENABLE_DEFAULT, value);
 	tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
 			    TRANSLATE_FURTHER_PROTECTION_FAULT_ENABLE_DEFAULT,
 			    value);
 	tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
 			    NACK_PROTECTION_FAULT_ENABLE_DEFAULT, value);
 	tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
 			    DUMMY_PAGE_PROTECTION_FAULT_ENABLE_DEFAULT, value);
 	tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
 			    VALID_PROTECTION_FAULT_ENABLE_DEFAULT, value);
 	tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
 			    READ_PROTECTION_FAULT_ENABLE_DEFAULT, value);
 	tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
 			    WRITE_PROTECTION_FAULT_ENABLE_DEFAULT, value);
 	tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
 			    EXECUTE_PROTECTION_FAULT_ENABLE_DEFAULT, value);
 	if (!value) {
 		tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
 				CRASH_ON_NO_RETRY_FAULT, 1);
 		tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
 				CRASH_ON_RETRY_FAULT, 1);
 	}
 	WREG32_SOC15(GC, 0, mmGCVM_L2_PROTECTION_FAULT_CNTL, tmp);
 }

 void gfxhub_v2_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,
 				 mmGCVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_LO32);
 	hub->ctx0_ptb_addr_hi32 =
 		SOC15_REG_OFFSET(GC, 0,
 				 mmGCVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_HI32);
 	hub->vm_inv_eng0_req =
 		SOC15_REG_OFFSET(GC, 0, mmGCVM_INVALIDATE_ENG0_REQ);
 	hub->vm_inv_eng0_ack =
 		SOC15_REG_OFFSET(GC, 0, mmGCVM_INVALIDATE_ENG0_ACK);
 	hub->vm_context0_cntl =
 		SOC15_REG_OFFSET(GC, 0, mmGCVM_CONTEXT0_CNTL);
 	hub->vm_l2_pro_fault_status =
 		SOC15_REG_OFFSET(GC, 0, mmGCVM_L2_PROTECTION_FAULT_STATUS);
 	hub->vm_l2_pro_fault_cntl =
 		SOC15_REG_OFFSET(GC, 0, mmGCVM_L2_PROTECTION_FAULT_CNTL);
 }
	/*
	* Copyright 2019 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_v2_0.h"

	#include "gc/gc_10_1_0_offset.h"
	#include "gc/gc_10_1_0_sh_mask.h"
	#include "gc/gc_10_1_0_default.h"
	#include "navi10_enum.h"

	#include "soc15_common.h"

	u64 gfxhub_v2_0_get_fb_location(struct amdgpu_device *adev)
	{
	u64 base = RREG32_SOC15(GC, 0, mmGCMC_VM_FB_LOCATION_BASE);

	base &= GCMC_VM_FB_LOCATION_BASE__FB_BASE_MASK;
	base <<= 24;

	return base;
	}

	u64 gfxhub_v2_0_get_mc_fb_offset(struct amdgpu_device *adev)
	{
	return (u64)RREG32_SOC15(GC, 0, mmGCMC_VM_FB_OFFSET) << 24;
	}

	static void gfxhub_v2_0_init_gart_pt_regs(struct amdgpu_device *adev)
	{
	uint64_t value = amdgpu_gmc_pd_addr(adev->gart.bo);


	WREG32_SOC15(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_LO32,
	lower_32_bits(value));

	WREG32_SOC15(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_HI32,
	upper_32_bits(value));
	}

	static void gfxhub_v2_0_init_gart_aperture_regs(struct amdgpu_device *adev)
	{
	gfxhub_v2_0_init_gart_pt_regs(adev);

	WREG32_SOC15(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_START_ADDR_LO32,
	(u32)(adev->gmc.gart_start >> 12));
	WREG32_SOC15(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_START_ADDR_HI32,
	(u32)(adev->gmc.gart_start >> 44));

	WREG32_SOC15(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_END_ADDR_LO32,
	(u32)(adev->gmc.gart_end >> 12));
	WREG32_SOC15(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_END_ADDR_HI32,
	(u32)(adev->gmc.gart_end >> 44));
	}

	static void gfxhub_v2_0_init_system_aperture_regs(struct amdgpu_device *adev)
	{
	uint64_t value;

	/* Disable AGP. */
	WREG32_SOC15(GC, 0, mmGCMC_VM_AGP_BASE, 0);
	WREG32_SOC15(GC, 0, mmGCMC_VM_AGP_TOP, 0);
	WREG32_SOC15(GC, 0, mmGCMC_VM_AGP_BOT, 0x00FFFFFF);

	/* Program the system aperture low logical page number. */
	WREG32_SOC15(GC, 0, mmGCMC_VM_SYSTEM_APERTURE_LOW_ADDR,
	adev->gmc.vram_start >> 18);
	WREG32_SOC15(GC, 0, mmGCMC_VM_SYSTEM_APERTURE_HIGH_ADDR,
	adev->gmc.vram_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, mmGCMC_VM_SYSTEM_APERTURE_DEFAULT_ADDR_LSB,
	(u32)(value >> 12));
	WREG32_SOC15(GC, 0, mmGCMC_VM_SYSTEM_APERTURE_DEFAULT_ADDR_MSB,
	(u32)(value >> 44));

	/* Program "protection fault". */
	WREG32_SOC15(GC, 0, mmGCVM_L2_PROTECTION_FAULT_DEFAULT_ADDR_LO32,
	(u32)(adev->dummy_page_addr >> 12));
	WREG32_SOC15(GC, 0, mmGCVM_L2_PROTECTION_FAULT_DEFAULT_ADDR_HI32,
	(u32)((u64)adev->dummy_page_addr >> 44));

	WREG32_FIELD15(GC, 0, GCVM_L2_PROTECTION_FAULT_CNTL2,
	ACTIVE_PAGE_MIGRATION_PTE_READ_RETRY, 1);
	}


	static void gfxhub_v2_0_init_tlb_regs(struct amdgpu_device *adev)
	{
	uint32_t tmp;

	/* Setup TLB control */
	tmp = RREG32_SOC15(GC, 0, mmGCMC_VM_MX_L1_TLB_CNTL);

	tmp = REG_SET_FIELD(tmp, GCMC_VM_MX_L1_TLB_CNTL, ENABLE_L1_TLB, 1);
	tmp = REG_SET_FIELD(tmp, GCMC_VM_MX_L1_TLB_CNTL, SYSTEM_ACCESS_MODE, 3);
	tmp = REG_SET_FIELD(tmp, GCMC_VM_MX_L1_TLB_CNTL,
	ENABLE_ADVANCED_DRIVER_MODEL, 1);
	tmp = REG_SET_FIELD(tmp, GCMC_VM_MX_L1_TLB_CNTL,
	SYSTEM_APERTURE_UNMAPPED_ACCESS, 0);
	tmp = REG_SET_FIELD(tmp, GCMC_VM_MX_L1_TLB_CNTL, ECO_BITS, 0);
	tmp = REG_SET_FIELD(tmp, GCMC_VM_MX_L1_TLB_CNTL,
	MTYPE, MTYPE_UC); /* UC, uncached */

	WREG32_SOC15(GC, 0, mmGCMC_VM_MX_L1_TLB_CNTL, tmp);
	}

	static void gfxhub_v2_0_init_cache_regs(struct amdgpu_device *adev)
	{
	uint32_t tmp;

	/* Setup L2 cache */
	tmp = RREG32_SOC15(GC, 0, mmGCVM_L2_CNTL);
	tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL, ENABLE_L2_CACHE, 1);
	tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL, ENABLE_L2_FRAGMENT_PROCESSING, 0);
	tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL,
	ENABLE_DEFAULT_PAGE_OUT_TO_SYSTEM_MEMORY, 1);
	/* XXX for emulation, Refer to closed source code.*/
	tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL,
	L2_PDE0_CACHE_TAG_GENERATION_MODE, 0);
	tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL, PDE_FAULT_CLASSIFICATION, 0);
	tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL, CONTEXT1_IDENTITY_ACCESS_MODE, 1);
	tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL, IDENTITY_MODE_FRAGMENT_SIZE, 0);
	WREG32_SOC15(GC, 0, mmGCVM_L2_CNTL, tmp);

	tmp = RREG32_SOC15(GC, 0, mmGCVM_L2_CNTL2);
	tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL2, INVALIDATE_ALL_L1_TLBS, 1);
	tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL2, INVALIDATE_L2_CACHE, 1);
	WREG32_SOC15(GC, 0, mmGCVM_L2_CNTL2, tmp);

	tmp = mmGCVM_L2_CNTL3_DEFAULT;
	WREG32_SOC15(GC, 0, mmGCVM_L2_CNTL3, tmp);

	tmp = mmGCVM_L2_CNTL4_DEFAULT;
	tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL4, VMC_TAP_PDE_REQUEST_PHYSICAL, 0);
	tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL4, VMC_TAP_PTE_REQUEST_PHYSICAL, 0);
	WREG32_SOC15(GC, 0, mmGCVM_L2_CNTL4, tmp);
	}

	static void gfxhub_v2_0_enable_system_domain(struct amdgpu_device *adev)
	{
	uint32_t tmp;

	tmp = RREG32_SOC15(GC, 0, mmGCVM_CONTEXT0_CNTL);
	tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT0_CNTL, ENABLE_CONTEXT, 1);
	tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT0_CNTL, PAGE_TABLE_DEPTH, 0);
	WREG32_SOC15(GC, 0, mmGCVM_CONTEXT0_CNTL, tmp);
	}

	static void gfxhub_v2_0_disable_identity_aperture(struct amdgpu_device *adev)
	{
	WREG32_SOC15(GC, 0, mmGCVM_L2_CONTEXT1_IDENTITY_APERTURE_LOW_ADDR_LO32,
	0xFFFFFFFF);
	WREG32_SOC15(GC, 0, mmGCVM_L2_CONTEXT1_IDENTITY_APERTURE_LOW_ADDR_HI32,
	0x0000000F);

	WREG32_SOC15(GC, 0, mmGCVM_L2_CONTEXT1_IDENTITY_APERTURE_HIGH_ADDR_LO32,
	0);
	WREG32_SOC15(GC, 0, mmGCVM_L2_CONTEXT1_IDENTITY_APERTURE_HIGH_ADDR_HI32,
	0);

	WREG32_SOC15(GC, 0, mmGCVM_L2_CONTEXT_IDENTITY_PHYSICAL_OFFSET_LO32, 0);
	WREG32_SOC15(GC, 0, mmGCVM_L2_CONTEXT_IDENTITY_PHYSICAL_OFFSET_HI32, 0);

	}

	static void gfxhub_v2_0_setup_vmid_config(struct amdgpu_device *adev)
	{
	int i;
	uint32_t tmp;

	for (i = 0; i <= 14; i++) {
	tmp = RREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT1_CNTL, i);
	tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT1_CNTL, ENABLE_CONTEXT, 1);
	tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT1_CNTL, PAGE_TABLE_DEPTH,
	adev->vm_manager.num_level);
	tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT1_CNTL,
	RANGE_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
	tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT1_CNTL,
	DUMMY_PAGE_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
	tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT1_CNTL,
	PDE0_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
	tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT1_CNTL,
	VALID_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
	tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT1_CNTL,
	READ_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
	tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT1_CNTL,
	WRITE_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
	tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT1_CNTL,
	EXECUTE_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
	tmp = REG_SET_FIELD(tmp, GCVM_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, GCVM_CONTEXT1_CNTL,
	RETRY_PERMISSION_OR_INVALID_PAGE_FAULT,
	!amdgpu_noretry);
	WREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT1_CNTL, i, tmp);
	WREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT1_PAGE_TABLE_START_ADDR_LO32, i*2, 0);
	WREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT1_PAGE_TABLE_START_ADDR_HI32, i*2, 0);
	WREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT1_PAGE_TABLE_END_ADDR_LO32, i*2,
	lower_32_bits(adev->vm_manager.max_pfn - 1));
	WREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT1_PAGE_TABLE_END_ADDR_HI32, i*2,
	upper_32_bits(adev->vm_manager.max_pfn - 1));
	}
	}

	static void gfxhub_v2_0_program_invalidation(struct amdgpu_device *adev)
	{
	unsigned i;

	for (i = 0 ; i < 18; ++i) {
	WREG32_SOC15_OFFSET(GC, 0, mmGCVM_INVALIDATE_ENG0_ADDR_RANGE_LO32,
	2 * i, 0xffffffff);
	WREG32_SOC15_OFFSET(GC, 0, mmGCVM_INVALIDATE_ENG0_ADDR_RANGE_HI32,
	2 * i, 0x1f);
	}
	}

	int gfxhub_v2_0_gart_enable(struct amdgpu_device *adev)
	{
	if (amdgpu_sriov_vf(adev)) {
	/*
	* GCMC_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(GC, 0, mmGCMC_VM_FB_LOCATION_BASE,
	adev->gmc.vram_start >> 24);
	WREG32_SOC15(GC, 0, mmGCMC_VM_FB_LOCATION_TOP,
	adev->gmc.vram_end >> 24);
	}

	/* GART Enable. */
	gfxhub_v2_0_init_gart_aperture_regs(adev);
	gfxhub_v2_0_init_system_aperture_regs(adev);
	gfxhub_v2_0_init_tlb_regs(adev);
	gfxhub_v2_0_init_cache_regs(adev);

	gfxhub_v2_0_enable_system_domain(adev);
	gfxhub_v2_0_disable_identity_aperture(adev);
	gfxhub_v2_0_setup_vmid_config(adev);
	gfxhub_v2_0_program_invalidation(adev);

	return 0;
	}

	void gfxhub_v2_0_gart_disable(struct amdgpu_device *adev)
	{
	u32 tmp;
	u32 i;

	/* Disable all tables */
	for (i = 0; i < 16; i++)
	WREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT0_CNTL, i, 0);

	/* Setup TLB control */
	tmp = RREG32_SOC15(GC, 0, mmGCMC_VM_MX_L1_TLB_CNTL);
	tmp = REG_SET_FIELD(tmp, GCMC_VM_MX_L1_TLB_CNTL, ENABLE_L1_TLB, 0);
	tmp = REG_SET_FIELD(tmp, GCMC_VM_MX_L1_TLB_CNTL,
	ENABLE_ADVANCED_DRIVER_MODEL, 0);
	WREG32_SOC15(GC, 0, mmGCMC_VM_MX_L1_TLB_CNTL, tmp);

	/* Setup L2 cache */
	WREG32_FIELD15(GC, 0, GCVM_L2_CNTL, ENABLE_L2_CACHE, 0);
	WREG32_SOC15(GC, 0, mmGCVM_L2_CNTL3, 0);
	}

	/**
	* gfxhub_v2_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_v2_0_set_fault_enable_default(struct amdgpu_device *adev,
	bool value)
	{
	u32 tmp;
	tmp = RREG32_SOC15(GC, 0, mmGCVM_L2_PROTECTION_FAULT_CNTL);
	tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
	RANGE_PROTECTION_FAULT_ENABLE_DEFAULT, value);
	tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
	PDE0_PROTECTION_FAULT_ENABLE_DEFAULT, value);
	tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
	PDE1_PROTECTION_FAULT_ENABLE_DEFAULT, value);
	tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
	PDE2_PROTECTION_FAULT_ENABLE_DEFAULT, value);
	tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
	TRANSLATE_FURTHER_PROTECTION_FAULT_ENABLE_DEFAULT,
	value);
	tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
	NACK_PROTECTION_FAULT_ENABLE_DEFAULT, value);
	tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
	DUMMY_PAGE_PROTECTION_FAULT_ENABLE_DEFAULT, value);
	tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
	VALID_PROTECTION_FAULT_ENABLE_DEFAULT, value);
	tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
	READ_PROTECTION_FAULT_ENABLE_DEFAULT, value);
	tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
	WRITE_PROTECTION_FAULT_ENABLE_DEFAULT, value);
	tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
	EXECUTE_PROTECTION_FAULT_ENABLE_DEFAULT, value);
	if (!value) {
	tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
	CRASH_ON_NO_RETRY_FAULT, 1);
	tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
	CRASH_ON_RETRY_FAULT, 1);
	}
	WREG32_SOC15(GC, 0, mmGCVM_L2_PROTECTION_FAULT_CNTL, tmp);
	}

	void gfxhub_v2_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,
	mmGCVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_LO32);
	hub->ctx0_ptb_addr_hi32 =
	SOC15_REG_OFFSET(GC, 0,
	mmGCVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_HI32);
	hub->vm_inv_eng0_req =
	SOC15_REG_OFFSET(GC, 0, mmGCVM_INVALIDATE_ENG0_REQ);
	hub->vm_inv_eng0_ack =
	SOC15_REG_OFFSET(GC, 0, mmGCVM_INVALIDATE_ENG0_ACK);
	hub->vm_context0_cntl =
	SOC15_REG_OFFSET(GC, 0, mmGCVM_CONTEXT0_CNTL);
	hub->vm_l2_pro_fault_status =
	SOC15_REG_OFFSET(GC, 0, mmGCVM_L2_PROTECTION_FAULT_STATUS);
	hub->vm_l2_pro_fault_cntl =
	SOC15_REG_OFFSET(GC, 0, mmGCVM_L2_PROTECTION_FAULT_CNTL);
	}