xref: /openbmc/linux/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c (revision 53b3f8f4)

/*
 * 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 <linux/firmware.h>
#include <linux/pci.h>

#include <drm/drm_cache.h>

#include "amdgpu.h"
#include "gmc_v9_0.h"
#include "amdgpu_atomfirmware.h"
#include "amdgpu_gem.h"

#include "hdp/hdp_4_0_offset.h"
#include "hdp/hdp_4_0_sh_mask.h"
#include "gc/gc_9_0_sh_mask.h"
#include "dce/dce_12_0_offset.h"
#include "dce/dce_12_0_sh_mask.h"
#include "vega10_enum.h"
#include "mmhub/mmhub_1_0_offset.h"
#include "athub/athub_1_0_sh_mask.h"
#include "athub/athub_1_0_offset.h"
#include "oss/osssys_4_0_offset.h"

#include "soc15.h"
#include "soc15d.h"
#include "soc15_common.h"
#include "umc/umc_6_0_sh_mask.h"

#include "gfxhub_v1_0.h"
#include "mmhub_v1_0.h"
#include "athub_v1_0.h"
#include "gfxhub_v1_1.h"
#include "mmhub_v9_4.h"
#include "umc_v6_1.h"
#include "umc_v6_0.h"

#include "ivsrcid/vmc/irqsrcs_vmc_1_0.h"

#include "amdgpu_ras.h"
#include "amdgpu_xgmi.h"

/* add these here since we already include dce12 headers and these are for DCN */
#define mmHUBP0_DCSURF_PRI_VIEWPORT_DIMENSION                                                          0x055d
#define mmHUBP0_DCSURF_PRI_VIEWPORT_DIMENSION_BASE_IDX                                                 2
#define HUBP0_DCSURF_PRI_VIEWPORT_DIMENSION__PRI_VIEWPORT_WIDTH__SHIFT                                        0x0
#define HUBP0_DCSURF_PRI_VIEWPORT_DIMENSION__PRI_VIEWPORT_HEIGHT__SHIFT                                       0x10
#define HUBP0_DCSURF_PRI_VIEWPORT_DIMENSION__PRI_VIEWPORT_WIDTH_MASK                                          0x00003FFFL
#define HUBP0_DCSURF_PRI_VIEWPORT_DIMENSION__PRI_VIEWPORT_HEIGHT_MASK                                         0x3FFF0000L

static const u32 golden_settings_vega10_hdp[] =
{
	0xf64, 0x0fffffff, 0x00000000,
	0xf65, 0x0fffffff, 0x00000000,
	0xf66, 0x0fffffff, 0x00000000,
	0xf67, 0x0fffffff, 0x00000000,
	0xf68, 0x0fffffff, 0x00000000,
	0xf6a, 0x0fffffff, 0x00000000,
	0xf6b, 0x0fffffff, 0x00000000,
	0xf6c, 0x0fffffff, 0x00000000,
	0xf6d, 0x0fffffff, 0x00000000,
	0xf6e, 0x0fffffff, 0x00000000,
};

static const struct soc15_reg_golden golden_settings_mmhub_1_0_0[] =
{
	SOC15_REG_GOLDEN_VALUE(MMHUB, 0, mmDAGB1_WRCLI2, 0x00000007, 0xfe5fe0fa),
	SOC15_REG_GOLDEN_VALUE(MMHUB, 0, mmMMEA1_DRAM_WR_CLI2GRP_MAP0, 0x00000030, 0x55555565)
};

static const struct soc15_reg_golden golden_settings_athub_1_0_0[] =
{
	SOC15_REG_GOLDEN_VALUE(ATHUB, 0, mmRPB_ARB_CNTL, 0x0000ff00, 0x00000800),
	SOC15_REG_GOLDEN_VALUE(ATHUB, 0, mmRPB_ARB_CNTL2, 0x00ff00ff, 0x00080008)
};

static const uint32_t ecc_umc_mcumc_ctrl_addrs[] = {
	(0x000143c0 + 0x00000000),
	(0x000143c0 + 0x00000800),
	(0x000143c0 + 0x00001000),
	(0x000143c0 + 0x00001800),
	(0x000543c0 + 0x00000000),
	(0x000543c0 + 0x00000800),
	(0x000543c0 + 0x00001000),
	(0x000543c0 + 0x00001800),
	(0x000943c0 + 0x00000000),
	(0x000943c0 + 0x00000800),
	(0x000943c0 + 0x00001000),
	(0x000943c0 + 0x00001800),
	(0x000d43c0 + 0x00000000),
	(0x000d43c0 + 0x00000800),
	(0x000d43c0 + 0x00001000),
	(0x000d43c0 + 0x00001800),
	(0x001143c0 + 0x00000000),
	(0x001143c0 + 0x00000800),
	(0x001143c0 + 0x00001000),
	(0x001143c0 + 0x00001800),
	(0x001543c0 + 0x00000000),
	(0x001543c0 + 0x00000800),
	(0x001543c0 + 0x00001000),
	(0x001543c0 + 0x00001800),
	(0x001943c0 + 0x00000000),
	(0x001943c0 + 0x00000800),
	(0x001943c0 + 0x00001000),
	(0x001943c0 + 0x00001800),
	(0x001d43c0 + 0x00000000),
	(0x001d43c0 + 0x00000800),
	(0x001d43c0 + 0x00001000),
	(0x001d43c0 + 0x00001800),
};

static const uint32_t ecc_umc_mcumc_ctrl_mask_addrs[] = {
	(0x000143e0 + 0x00000000),
	(0x000143e0 + 0x00000800),
	(0x000143e0 + 0x00001000),
	(0x000143e0 + 0x00001800),
	(0x000543e0 + 0x00000000),
	(0x000543e0 + 0x00000800),
	(0x000543e0 + 0x00001000),
	(0x000543e0 + 0x00001800),
	(0x000943e0 + 0x00000000),
	(0x000943e0 + 0x00000800),
	(0x000943e0 + 0x00001000),
	(0x000943e0 + 0x00001800),
	(0x000d43e0 + 0x00000000),
	(0x000d43e0 + 0x00000800),
	(0x000d43e0 + 0x00001000),
	(0x000d43e0 + 0x00001800),
	(0x001143e0 + 0x00000000),
	(0x001143e0 + 0x00000800),
	(0x001143e0 + 0x00001000),
	(0x001143e0 + 0x00001800),
	(0x001543e0 + 0x00000000),
	(0x001543e0 + 0x00000800),
	(0x001543e0 + 0x00001000),
	(0x001543e0 + 0x00001800),
	(0x001943e0 + 0x00000000),
	(0x001943e0 + 0x00000800),
	(0x001943e0 + 0x00001000),
	(0x001943e0 + 0x00001800),
	(0x001d43e0 + 0x00000000),
	(0x001d43e0 + 0x00000800),
	(0x001d43e0 + 0x00001000),
	(0x001d43e0 + 0x00001800),
};

static const uint32_t ecc_umc_mcumc_status_addrs[] = {
	(0x000143c2 + 0x00000000),
	(0x000143c2 + 0x00000800),
	(0x000143c2 + 0x00001000),
	(0x000143c2 + 0x00001800),
	(0x000543c2 + 0x00000000),
	(0x000543c2 + 0x00000800),
	(0x000543c2 + 0x00001000),
	(0x000543c2 + 0x00001800),
	(0x000943c2 + 0x00000000),
	(0x000943c2 + 0x00000800),
	(0x000943c2 + 0x00001000),
	(0x000943c2 + 0x00001800),
	(0x000d43c2 + 0x00000000),
	(0x000d43c2 + 0x00000800),
	(0x000d43c2 + 0x00001000),
	(0x000d43c2 + 0x00001800),
	(0x001143c2 + 0x00000000),
	(0x001143c2 + 0x00000800),
	(0x001143c2 + 0x00001000),
	(0x001143c2 + 0x00001800),
	(0x001543c2 + 0x00000000),
	(0x001543c2 + 0x00000800),
	(0x001543c2 + 0x00001000),
	(0x001543c2 + 0x00001800),
	(0x001943c2 + 0x00000000),
	(0x001943c2 + 0x00000800),
	(0x001943c2 + 0x00001000),
	(0x001943c2 + 0x00001800),
	(0x001d43c2 + 0x00000000),
	(0x001d43c2 + 0x00000800),
	(0x001d43c2 + 0x00001000),
	(0x001d43c2 + 0x00001800),
};

static int gmc_v9_0_ecc_interrupt_state(struct amdgpu_device *adev,
		struct amdgpu_irq_src *src,
		unsigned type,
		enum amdgpu_interrupt_state state)
{
	u32 bits, i, tmp, reg;

	/* Devices newer then VEGA10/12 shall have these programming
	     sequences performed by PSP BL */
	if (adev->asic_type >= CHIP_VEGA20)
		return 0;

	bits = 0x7f;

	switch (state) {
	case AMDGPU_IRQ_STATE_DISABLE:
		for (i = 0; i < ARRAY_SIZE(ecc_umc_mcumc_ctrl_addrs); i++) {
			reg = ecc_umc_mcumc_ctrl_addrs[i];
			tmp = RREG32(reg);
			tmp &= ~bits;
			WREG32(reg, tmp);
		}
		for (i = 0; i < ARRAY_SIZE(ecc_umc_mcumc_ctrl_mask_addrs); i++) {
			reg = ecc_umc_mcumc_ctrl_mask_addrs[i];
			tmp = RREG32(reg);
			tmp &= ~bits;
			WREG32(reg, tmp);
		}
		break;
	case AMDGPU_IRQ_STATE_ENABLE:
		for (i = 0; i < ARRAY_SIZE(ecc_umc_mcumc_ctrl_addrs); i++) {
			reg = ecc_umc_mcumc_ctrl_addrs[i];
			tmp = RREG32(reg);
			tmp |= bits;
			WREG32(reg, tmp);
		}
		for (i = 0; i < ARRAY_SIZE(ecc_umc_mcumc_ctrl_mask_addrs); i++) {
			reg = ecc_umc_mcumc_ctrl_mask_addrs[i];
			tmp = RREG32(reg);
			tmp |= bits;
			WREG32(reg, tmp);
		}
		break;
	default:
		break;
	}

	return 0;
}

static int gmc_v9_0_vm_fault_interrupt_state(struct amdgpu_device *adev,
					struct amdgpu_irq_src *src,
					unsigned type,
					enum amdgpu_interrupt_state state)
{
	struct amdgpu_vmhub *hub;
	u32 tmp, reg, bits, i, j;

	bits = VM_CONTEXT1_CNTL__RANGE_PROTECTION_FAULT_ENABLE_INTERRUPT_MASK |
		VM_CONTEXT1_CNTL__DUMMY_PAGE_PROTECTION_FAULT_ENABLE_INTERRUPT_MASK |
		VM_CONTEXT1_CNTL__PDE0_PROTECTION_FAULT_ENABLE_INTERRUPT_MASK |
		VM_CONTEXT1_CNTL__VALID_PROTECTION_FAULT_ENABLE_INTERRUPT_MASK |
		VM_CONTEXT1_CNTL__READ_PROTECTION_FAULT_ENABLE_INTERRUPT_MASK |
		VM_CONTEXT1_CNTL__WRITE_PROTECTION_FAULT_ENABLE_INTERRUPT_MASK |
		VM_CONTEXT1_CNTL__EXECUTE_PROTECTION_FAULT_ENABLE_INTERRUPT_MASK;

	switch (state) {
	case AMDGPU_IRQ_STATE_DISABLE:
		for (j = 0; j < adev->num_vmhubs; j++) {
			hub = &adev->vmhub[j];
			for (i = 0; i < 16; i++) {
				reg = hub->vm_context0_cntl + i;
				tmp = RREG32(reg);
				tmp &= ~bits;
				WREG32(reg, tmp);
			}
		}
		break;
	case AMDGPU_IRQ_STATE_ENABLE:
		for (j = 0; j < adev->num_vmhubs; j++) {
			hub = &adev->vmhub[j];
			for (i = 0; i < 16; i++) {
				reg = hub->vm_context0_cntl + i;
				tmp = RREG32(reg);
				tmp |= bits;
				WREG32(reg, tmp);
			}
		}
	default:
		break;
	}

	return 0;
}

static int gmc_v9_0_process_interrupt(struct amdgpu_device *adev,
				struct amdgpu_irq_src *source,
				struct amdgpu_iv_entry *entry)
{
	struct amdgpu_vmhub *hub;
	bool retry_fault = !!(entry->src_data[1] & 0x80);
	uint32_t status = 0;
	u64 addr;
	char hub_name[10];

	addr = (u64)entry->src_data[0] << 12;
	addr |= ((u64)entry->src_data[1] & 0xf) << 44;

	if (retry_fault && amdgpu_gmc_filter_faults(adev, addr, entry->pasid,
						    entry->timestamp))
		return 1; /* This also prevents sending it to KFD */

	if (entry->client_id == SOC15_IH_CLIENTID_VMC) {
		snprintf(hub_name, sizeof(hub_name), "mmhub0");
		hub = &adev->vmhub[AMDGPU_MMHUB_0];
	} else if (entry->client_id == SOC15_IH_CLIENTID_VMC1) {
		snprintf(hub_name, sizeof(hub_name), "mmhub1");
		hub = &adev->vmhub[AMDGPU_MMHUB_1];
	} else {
		snprintf(hub_name, sizeof(hub_name), "gfxhub0");
		hub = &adev->vmhub[AMDGPU_GFXHUB_0];
	}

	/* If it's the first fault for this address, process it normally */
	if (retry_fault && !in_interrupt() &&
	    amdgpu_vm_handle_fault(adev, entry->pasid, addr))
		return 1; /* This also prevents sending it to KFD */

	if (!amdgpu_sriov_vf(adev)) {
		/*
		 * Issue a dummy read to wait for the status register to
		 * be updated to avoid reading an incorrect value due to
		 * the new fast GRBM interface.
		 */
		if (entry->vmid_src == AMDGPU_GFXHUB_0)
			RREG32(hub->vm_l2_pro_fault_status);

		status = RREG32(hub->vm_l2_pro_fault_status);
		WREG32_P(hub->vm_l2_pro_fault_cntl, 1, ~1);
	}

	if (printk_ratelimit()) {
		struct amdgpu_task_info task_info;

		memset(&task_info, 0, sizeof(struct amdgpu_task_info));
		amdgpu_vm_get_task_info(adev, entry->pasid, &task_info);

		dev_err(adev->dev,
			"[%s] %s page fault (src_id:%u ring:%u vmid:%u "
			"pasid:%u, for process %s pid %d thread %s pid %d)\n",
			hub_name, retry_fault ? "retry" : "no-retry",
			entry->src_id, entry->ring_id, entry->vmid,
			entry->pasid, task_info.process_name, task_info.tgid,
			task_info.task_name, task_info.pid);
		dev_err(adev->dev, "  in page starting at address 0x%016llx from client %d\n",
			addr, entry->client_id);
		if (!amdgpu_sriov_vf(adev)) {
			dev_err(adev->dev,
				"VM_L2_PROTECTION_FAULT_STATUS:0x%08X\n",
				status);
			dev_err(adev->dev, "\t Faulty UTCL2 client ID: 0x%lx\n",
				REG_GET_FIELD(status,
				VM_L2_PROTECTION_FAULT_STATUS, CID));
			dev_err(adev->dev, "\t MORE_FAULTS: 0x%lx\n",
				REG_GET_FIELD(status,
				VM_L2_PROTECTION_FAULT_STATUS, MORE_FAULTS));
			dev_err(adev->dev, "\t WALKER_ERROR: 0x%lx\n",
				REG_GET_FIELD(status,
				VM_L2_PROTECTION_FAULT_STATUS, WALKER_ERROR));
			dev_err(adev->dev, "\t PERMISSION_FAULTS: 0x%lx\n",
				REG_GET_FIELD(status,
				VM_L2_PROTECTION_FAULT_STATUS, PERMISSION_FAULTS));
			dev_err(adev->dev, "\t MAPPING_ERROR: 0x%lx\n",
				REG_GET_FIELD(status,
				VM_L2_PROTECTION_FAULT_STATUS, MAPPING_ERROR));
			dev_err(adev->dev, "\t RW: 0x%lx\n",
				REG_GET_FIELD(status,
				VM_L2_PROTECTION_FAULT_STATUS, RW));

		}
	}

	return 0;
}

static const struct amdgpu_irq_src_funcs gmc_v9_0_irq_funcs = {
	.set = gmc_v9_0_vm_fault_interrupt_state,
	.process = gmc_v9_0_process_interrupt,
};


static const struct amdgpu_irq_src_funcs gmc_v9_0_ecc_funcs = {
	.set = gmc_v9_0_ecc_interrupt_state,
	.process = amdgpu_umc_process_ecc_irq,
};

static void gmc_v9_0_set_irq_funcs(struct amdgpu_device *adev)
{
	adev->gmc.vm_fault.num_types = 1;
	adev->gmc.vm_fault.funcs = &gmc_v9_0_irq_funcs;

	if (!amdgpu_sriov_vf(adev)) {
		adev->gmc.ecc_irq.num_types = 1;
		adev->gmc.ecc_irq.funcs = &gmc_v9_0_ecc_funcs;
	}
}

static uint32_t gmc_v9_0_get_invalidate_req(unsigned int vmid,
					uint32_t flush_type)
{
	u32 req = 0;

	req = REG_SET_FIELD(req, VM_INVALIDATE_ENG0_REQ,
			    PER_VMID_INVALIDATE_REQ, 1 << vmid);
	req = REG_SET_FIELD(req, VM_INVALIDATE_ENG0_REQ, FLUSH_TYPE, flush_type);
	req = REG_SET_FIELD(req, VM_INVALIDATE_ENG0_REQ, INVALIDATE_L2_PTES, 1);
	req = REG_SET_FIELD(req, VM_INVALIDATE_ENG0_REQ, INVALIDATE_L2_PDE0, 1);
	req = REG_SET_FIELD(req, VM_INVALIDATE_ENG0_REQ, INVALIDATE_L2_PDE1, 1);
	req = REG_SET_FIELD(req, VM_INVALIDATE_ENG0_REQ, INVALIDATE_L2_PDE2, 1);
	req = REG_SET_FIELD(req, VM_INVALIDATE_ENG0_REQ, INVALIDATE_L1_PTES, 1);
	req = REG_SET_FIELD(req, VM_INVALIDATE_ENG0_REQ,
			    CLEAR_PROTECTION_FAULT_STATUS_ADDR,	0);

	return req;
}

/**
 * gmc_v9_0_use_invalidate_semaphore - judge whether to use semaphore
 *
 * @adev: amdgpu_device pointer
 * @vmhub: vmhub type
 *
 */
static bool gmc_v9_0_use_invalidate_semaphore(struct amdgpu_device *adev,
				       uint32_t vmhub)
{
	return ((vmhub == AMDGPU_MMHUB_0 ||
		 vmhub == AMDGPU_MMHUB_1) &&
		(!amdgpu_sriov_vf(adev)) &&
		(!(!(adev->apu_flags & AMD_APU_IS_RAVEN2) &&
		   (adev->apu_flags & AMD_APU_IS_PICASSO))));
}

static bool gmc_v9_0_get_atc_vmid_pasid_mapping_info(struct amdgpu_device *adev,
					uint8_t vmid, uint16_t *p_pasid)
{
	uint32_t value;

	value = RREG32(SOC15_REG_OFFSET(ATHUB, 0, mmATC_VMID0_PASID_MAPPING)
		     + vmid);
	*p_pasid = value & ATC_VMID0_PASID_MAPPING__PASID_MASK;

	return !!(value & ATC_VMID0_PASID_MAPPING__VALID_MASK);
}

/*
 * GART
 * VMID 0 is the physical GPU addresses as used by the kernel.
 * VMIDs 1-15 are used for userspace clients and are handled
 * by the amdgpu vm/hsa code.
 */

/**
 * gmc_v9_0_flush_gpu_tlb - tlb flush with certain type
 *
 * @adev: amdgpu_device pointer
 * @vmid: vm instance to flush
 * @flush_type: the flush type
 *
 * Flush the TLB for the requested page table using certain type.
 */
static void gmc_v9_0_flush_gpu_tlb(struct amdgpu_device *adev, uint32_t vmid,
					uint32_t vmhub, uint32_t flush_type)
{
	bool use_semaphore = gmc_v9_0_use_invalidate_semaphore(adev, vmhub);
	const unsigned eng = 17;
	u32 j, inv_req, inv_req2, tmp;
	struct amdgpu_vmhub *hub;

	BUG_ON(vmhub >= adev->num_vmhubs);

	hub = &adev->vmhub[vmhub];
	if (adev->gmc.xgmi.num_physical_nodes &&
	    adev->asic_type == CHIP_VEGA20) {
		/* Vega20+XGMI caches PTEs in TC and TLB. Add a
		 * heavy-weight TLB flush (type 2), which flushes
		 * both. Due to a race condition with concurrent
		 * memory accesses using the same TLB cache line, we
		 * still need a second TLB flush after this.
		 */
		inv_req = gmc_v9_0_get_invalidate_req(vmid, 2);
		inv_req2 = gmc_v9_0_get_invalidate_req(vmid, flush_type);
	} else {
		inv_req = gmc_v9_0_get_invalidate_req(vmid, flush_type);
		inv_req2 = 0;
	}

	/* This is necessary for a HW workaround under SRIOV as well
	 * as GFXOFF under bare metal
	 */
	if (adev->gfx.kiq.ring.sched.ready &&
			(amdgpu_sriov_runtime(adev) || !amdgpu_sriov_vf(adev)) &&
			!amdgpu_in_reset(adev)) {
		uint32_t req = hub->vm_inv_eng0_req + hub->eng_distance * eng;
		uint32_t ack = hub->vm_inv_eng0_ack + hub->eng_distance * eng;

		amdgpu_virt_kiq_reg_write_reg_wait(adev, req, ack, inv_req,
						   1 << vmid);
		return;
	}

	spin_lock(&adev->gmc.invalidate_lock);

	/*
	 * It may lose gpuvm invalidate acknowldege state across power-gating
	 * off cycle, add semaphore acquire before invalidation and semaphore
	 * release after invalidation to avoid entering power gated state
	 * to WA the Issue
	 */

	/* TODO: It needs to continue working on debugging with semaphore for GFXHUB as well. */
	if (use_semaphore) {
		for (j = 0; j < adev->usec_timeout; j++) {
			/* a read return value of 1 means semaphore acuqire */
			tmp = RREG32_NO_KIQ(hub->vm_inv_eng0_sem +
					    hub->eng_distance * eng);
			if (tmp & 0x1)
				break;
			udelay(1);
		}

		if (j >= adev->usec_timeout)
			DRM_ERROR("Timeout waiting for sem acquire in VM flush!\n");
	}

	do {
		WREG32_NO_KIQ(hub->vm_inv_eng0_req +
			      hub->eng_distance * eng, inv_req);

		/*
		 * Issue a dummy read to wait for the ACK register to
		 * be cleared to avoid a false ACK due to the new fast
		 * GRBM interface.
		 */
		if (vmhub == AMDGPU_GFXHUB_0)
			RREG32_NO_KIQ(hub->vm_inv_eng0_req +
				      hub->eng_distance * eng);

		for (j = 0; j < adev->usec_timeout; j++) {
			tmp = RREG32_NO_KIQ(hub->vm_inv_eng0_ack +
					    hub->eng_distance * eng);
			if (tmp & (1 << vmid))
				break;
			udelay(1);
		}

		inv_req = inv_req2;
		inv_req2 = 0;
	} while (inv_req);

	/* TODO: It needs to continue working on debugging with semaphore for GFXHUB as well. */
	if (use_semaphore)
		/*
		 * add semaphore release after invalidation,
		 * write with 0 means semaphore release
		 */
		WREG32_NO_KIQ(hub->vm_inv_eng0_sem +
			      hub->eng_distance * eng, 0);

	spin_unlock(&adev->gmc.invalidate_lock);

	if (j < adev->usec_timeout)
		return;

	DRM_ERROR("Timeout waiting for VM flush ACK!\n");
}

/**
 * gmc_v9_0_flush_gpu_tlb_pasid - tlb flush via pasid
 *
 * @adev: amdgpu_device pointer
 * @pasid: pasid to be flush
 *
 * Flush the TLB for the requested pasid.
 */
static int gmc_v9_0_flush_gpu_tlb_pasid(struct amdgpu_device *adev,
					uint16_t pasid, uint32_t flush_type,
					bool all_hub)
{
	int vmid, i;
	signed long r;
	uint32_t seq;
	uint16_t queried_pasid;
	bool ret;
	struct amdgpu_ring *ring = &adev->gfx.kiq.ring;
	struct amdgpu_kiq *kiq = &adev->gfx.kiq;

	if (amdgpu_in_reset(adev))
		return -EIO;

	if (ring->sched.ready) {
		/* Vega20+XGMI caches PTEs in TC and TLB. Add a
		 * heavy-weight TLB flush (type 2), which flushes
		 * both. Due to a race condition with concurrent
		 * memory accesses using the same TLB cache line, we
		 * still need a second TLB flush after this.
		 */
		bool vega20_xgmi_wa = (adev->gmc.xgmi.num_physical_nodes &&
				       adev->asic_type == CHIP_VEGA20);
		/* 2 dwords flush + 8 dwords fence */
		unsigned int ndw = kiq->pmf->invalidate_tlbs_size + 8;

		if (vega20_xgmi_wa)
			ndw += kiq->pmf->invalidate_tlbs_size;

		spin_lock(&adev->gfx.kiq.ring_lock);
		/* 2 dwords flush + 8 dwords fence */
		amdgpu_ring_alloc(ring, ndw);
		if (vega20_xgmi_wa)
			kiq->pmf->kiq_invalidate_tlbs(ring,
						      pasid, 2, all_hub);
		kiq->pmf->kiq_invalidate_tlbs(ring,
					pasid, flush_type, all_hub);
		r = amdgpu_fence_emit_polling(ring, &seq, MAX_KIQ_REG_WAIT);
		if (r) {
			amdgpu_ring_undo(ring);
			spin_unlock(&adev->gfx.kiq.ring_lock);
			return -ETIME;
		}

		amdgpu_ring_commit(ring);
		spin_unlock(&adev->gfx.kiq.ring_lock);
		r = amdgpu_fence_wait_polling(ring, seq, adev->usec_timeout);
		if (r < 1) {
			DRM_ERROR("wait for kiq fence error: %ld.\n", r);
			return -ETIME;
		}

		return 0;
	}

	for (vmid = 1; vmid < 16; vmid++) {

		ret = gmc_v9_0_get_atc_vmid_pasid_mapping_info(adev, vmid,
				&queried_pasid);
		if (ret && queried_pasid == pasid) {
			if (all_hub) {
				for (i = 0; i < adev->num_vmhubs; i++)
					gmc_v9_0_flush_gpu_tlb(adev, vmid,
							i, flush_type);
			} else {
				gmc_v9_0_flush_gpu_tlb(adev, vmid,
						AMDGPU_GFXHUB_0, flush_type);
			}
			break;
		}
	}

	return 0;

}

static uint64_t gmc_v9_0_emit_flush_gpu_tlb(struct amdgpu_ring *ring,
					    unsigned vmid, uint64_t pd_addr)
{
	bool use_semaphore = gmc_v9_0_use_invalidate_semaphore(ring->adev, ring->funcs->vmhub);
	struct amdgpu_device *adev = ring->adev;
	struct amdgpu_vmhub *hub = &adev->vmhub[ring->funcs->vmhub];
	uint32_t req = gmc_v9_0_get_invalidate_req(vmid, 0);
	unsigned eng = ring->vm_inv_eng;

	/*
	 * It may lose gpuvm invalidate acknowldege state across power-gating
	 * off cycle, add semaphore acquire before invalidation and semaphore
	 * release after invalidation to avoid entering power gated state
	 * to WA the Issue
	 */

	/* TODO: It needs to continue working on debugging with semaphore for GFXHUB as well. */
	if (use_semaphore)
		/* a read return value of 1 means semaphore acuqire */
		amdgpu_ring_emit_reg_wait(ring,
					  hub->vm_inv_eng0_sem +
					  hub->eng_distance * eng, 0x1, 0x1);

	amdgpu_ring_emit_wreg(ring, hub->ctx0_ptb_addr_lo32 +
			      (hub->ctx_addr_distance * vmid),
			      lower_32_bits(pd_addr));

	amdgpu_ring_emit_wreg(ring, hub->ctx0_ptb_addr_hi32 +
			      (hub->ctx_addr_distance * vmid),
			      upper_32_bits(pd_addr));

	amdgpu_ring_emit_reg_write_reg_wait(ring, hub->vm_inv_eng0_req +
					    hub->eng_distance * eng,
					    hub->vm_inv_eng0_ack +
					    hub->eng_distance * eng,
					    req, 1 << vmid);

	/* TODO: It needs to continue working on debugging with semaphore for GFXHUB as well. */
	if (use_semaphore)
		/*
		 * add semaphore release after invalidation,
		 * write with 0 means semaphore release
		 */
		amdgpu_ring_emit_wreg(ring, hub->vm_inv_eng0_sem +
				      hub->eng_distance * eng, 0);

	return pd_addr;
}

static void gmc_v9_0_emit_pasid_mapping(struct amdgpu_ring *ring, unsigned vmid,
					unsigned pasid)
{
	struct amdgpu_device *adev = ring->adev;
	uint32_t reg;

	/* Do nothing because there's no lut register for mmhub1. */
	if (ring->funcs->vmhub == AMDGPU_MMHUB_1)
		return;

	if (ring->funcs->vmhub == AMDGPU_GFXHUB_0)
		reg = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_VMID_0_LUT) + vmid;
	else
		reg = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_VMID_0_LUT_MM) + vmid;

	amdgpu_ring_emit_wreg(ring, reg, pasid);
}

/*
 * PTE format on VEGA 10:
 * 63:59 reserved
 * 58:57 mtype
 * 56 F
 * 55 L
 * 54 P
 * 53 SW
 * 52 T
 * 50:48 reserved
 * 47:12 4k physical page base address
 * 11:7 fragment
 * 6 write
 * 5 read
 * 4 exe
 * 3 Z
 * 2 snooped
 * 1 system
 * 0 valid
 *
 * PDE format on VEGA 10:
 * 63:59 block fragment size
 * 58:55 reserved
 * 54 P
 * 53:48 reserved
 * 47:6 physical base address of PD or PTE
 * 5:3 reserved
 * 2 C
 * 1 system
 * 0 valid
 */

static uint64_t gmc_v9_0_map_mtype(struct amdgpu_device *adev, uint32_t flags)

{
	switch (flags) {
	case AMDGPU_VM_MTYPE_DEFAULT:
		return AMDGPU_PTE_MTYPE_VG10(MTYPE_NC);
	case AMDGPU_VM_MTYPE_NC:
		return AMDGPU_PTE_MTYPE_VG10(MTYPE_NC);
	case AMDGPU_VM_MTYPE_WC:
		return AMDGPU_PTE_MTYPE_VG10(MTYPE_WC);
	case AMDGPU_VM_MTYPE_RW:
		return AMDGPU_PTE_MTYPE_VG10(MTYPE_RW);
	case AMDGPU_VM_MTYPE_CC:
		return AMDGPU_PTE_MTYPE_VG10(MTYPE_CC);
	case AMDGPU_VM_MTYPE_UC:
		return AMDGPU_PTE_MTYPE_VG10(MTYPE_UC);
	default:
		return AMDGPU_PTE_MTYPE_VG10(MTYPE_NC);
	}
}

static void gmc_v9_0_get_vm_pde(struct amdgpu_device *adev, int level,
				uint64_t *addr, uint64_t *flags)
{
	if (!(*flags & AMDGPU_PDE_PTE) && !(*flags & AMDGPU_PTE_SYSTEM))
		*addr = adev->vm_manager.vram_base_offset + *addr -
			adev->gmc.vram_start;
	BUG_ON(*addr & 0xFFFF00000000003FULL);

	if (!adev->gmc.translate_further)
		return;

	if (level == AMDGPU_VM_PDB1) {
		/* Set the block fragment size */
		if (!(*flags & AMDGPU_PDE_PTE))
			*flags |= AMDGPU_PDE_BFS(0x9);

	} else if (level == AMDGPU_VM_PDB0) {
		if (*flags & AMDGPU_PDE_PTE)
			*flags &= ~AMDGPU_PDE_PTE;
		else
			*flags |= AMDGPU_PTE_TF;
	}
}

static void gmc_v9_0_get_vm_pte(struct amdgpu_device *adev,
				struct amdgpu_bo_va_mapping *mapping,
				uint64_t *flags)
{
	*flags &= ~AMDGPU_PTE_EXECUTABLE;
	*flags |= mapping->flags & AMDGPU_PTE_EXECUTABLE;

	*flags &= ~AMDGPU_PTE_MTYPE_VG10_MASK;
	*flags |= mapping->flags & AMDGPU_PTE_MTYPE_VG10_MASK;

	if (mapping->flags & AMDGPU_PTE_PRT) {
		*flags |= AMDGPU_PTE_PRT;
		*flags &= ~AMDGPU_PTE_VALID;
	}

	if (adev->asic_type == CHIP_ARCTURUS &&
	    !(*flags & AMDGPU_PTE_SYSTEM) &&
	    mapping->bo_va->is_xgmi)
		*flags |= AMDGPU_PTE_SNOOPED;
}

static unsigned gmc_v9_0_get_vbios_fb_size(struct amdgpu_device *adev)
{
	u32 d1vga_control = RREG32_SOC15(DCE, 0, mmD1VGA_CONTROL);
	unsigned size;

	if (REG_GET_FIELD(d1vga_control, D1VGA_CONTROL, D1VGA_MODE_ENABLE)) {
		size = AMDGPU_VBIOS_VGA_ALLOCATION;
	} else {
		u32 viewport;

		switch (adev->asic_type) {
		case CHIP_RAVEN:
		case CHIP_RENOIR:
			viewport = RREG32_SOC15(DCE, 0, mmHUBP0_DCSURF_PRI_VIEWPORT_DIMENSION);
			size = (REG_GET_FIELD(viewport,
					      HUBP0_DCSURF_PRI_VIEWPORT_DIMENSION, PRI_VIEWPORT_HEIGHT) *
				REG_GET_FIELD(viewport,
					      HUBP0_DCSURF_PRI_VIEWPORT_DIMENSION, PRI_VIEWPORT_WIDTH) *
				4);
			break;
		case CHIP_VEGA10:
		case CHIP_VEGA12:
		case CHIP_VEGA20:
		default:
			viewport = RREG32_SOC15(DCE, 0, mmSCL0_VIEWPORT_SIZE);
			size = (REG_GET_FIELD(viewport, SCL0_VIEWPORT_SIZE, VIEWPORT_HEIGHT) *
				REG_GET_FIELD(viewport, SCL0_VIEWPORT_SIZE, VIEWPORT_WIDTH) *
				4);
			break;
		}
	}

	return size;
}

static const struct amdgpu_gmc_funcs gmc_v9_0_gmc_funcs = {
	.flush_gpu_tlb = gmc_v9_0_flush_gpu_tlb,
	.flush_gpu_tlb_pasid = gmc_v9_0_flush_gpu_tlb_pasid,
	.emit_flush_gpu_tlb = gmc_v9_0_emit_flush_gpu_tlb,
	.emit_pasid_mapping = gmc_v9_0_emit_pasid_mapping,
	.map_mtype = gmc_v9_0_map_mtype,
	.get_vm_pde = gmc_v9_0_get_vm_pde,
	.get_vm_pte = gmc_v9_0_get_vm_pte,
	.get_vbios_fb_size = gmc_v9_0_get_vbios_fb_size,
};

static void gmc_v9_0_set_gmc_funcs(struct amdgpu_device *adev)
{
	adev->gmc.gmc_funcs = &gmc_v9_0_gmc_funcs;
}

static void gmc_v9_0_set_umc_funcs(struct amdgpu_device *adev)
{
	switch (adev->asic_type) {
	case CHIP_VEGA10:
		adev->umc.funcs = &umc_v6_0_funcs;
		break;
	case CHIP_VEGA20:
		adev->umc.max_ras_err_cnt_per_query = UMC_V6_1_TOTAL_CHANNEL_NUM;
		adev->umc.channel_inst_num = UMC_V6_1_CHANNEL_INSTANCE_NUM;
		adev->umc.umc_inst_num = UMC_V6_1_UMC_INSTANCE_NUM;
		adev->umc.channel_offs = UMC_V6_1_PER_CHANNEL_OFFSET_VG20;
		adev->umc.channel_idx_tbl = &umc_v6_1_channel_idx_tbl[0][0];
		adev->umc.funcs = &umc_v6_1_funcs;
		break;
	case CHIP_ARCTURUS:
		adev->umc.max_ras_err_cnt_per_query = UMC_V6_1_TOTAL_CHANNEL_NUM;
		adev->umc.channel_inst_num = UMC_V6_1_CHANNEL_INSTANCE_NUM;
		adev->umc.umc_inst_num = UMC_V6_1_UMC_INSTANCE_NUM;
		adev->umc.channel_offs = UMC_V6_1_PER_CHANNEL_OFFSET_ARCT;
		adev->umc.channel_idx_tbl = &umc_v6_1_channel_idx_tbl[0][0];
		adev->umc.funcs = &umc_v6_1_funcs;
		break;
	default:
		break;
	}
}

static void gmc_v9_0_set_mmhub_funcs(struct amdgpu_device *adev)
{
	switch (adev->asic_type) {
	case CHIP_ARCTURUS:
		adev->mmhub.funcs = &mmhub_v9_4_funcs;
		break;
	default:
		adev->mmhub.funcs = &mmhub_v1_0_funcs;
		break;
	}
}

static int gmc_v9_0_early_init(void *handle)
{
	struct amdgpu_device *adev = (struct amdgpu_device *)handle;

	gmc_v9_0_set_gmc_funcs(adev);
	gmc_v9_0_set_irq_funcs(adev);
	gmc_v9_0_set_umc_funcs(adev);
	gmc_v9_0_set_mmhub_funcs(adev);

	adev->gmc.shared_aperture_start = 0x2000000000000000ULL;
	adev->gmc.shared_aperture_end =
		adev->gmc.shared_aperture_start + (4ULL << 30) - 1;
	adev->gmc.private_aperture_start = 0x1000000000000000ULL;
	adev->gmc.private_aperture_end =
		adev->gmc.private_aperture_start + (4ULL << 30) - 1;

	return 0;
}

static int gmc_v9_0_late_init(void *handle)
{
	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
	int r;

	amdgpu_bo_late_init(adev);

	r = amdgpu_gmc_allocate_vm_inv_eng(adev);
	if (r)
		return r;
	/* Check if ecc is available */
	if (!amdgpu_sriov_vf(adev) && (adev->asic_type == CHIP_VEGA10)) {
		r = amdgpu_atomfirmware_mem_ecc_supported(adev);
		if (!r) {
			DRM_INFO("ECC is not present.\n");
			if (adev->df.funcs->enable_ecc_force_par_wr_rmw)
				adev->df.funcs->enable_ecc_force_par_wr_rmw(adev, false);
		} else
			DRM_INFO("ECC is active.\n");

		r = amdgpu_atomfirmware_sram_ecc_supported(adev);
		if (!r)
			DRM_INFO("SRAM ECC is not present.\n");
		else
			DRM_INFO("SRAM ECC is active.\n");
	}

	if (adev->mmhub.funcs && adev->mmhub.funcs->reset_ras_error_count)
		adev->mmhub.funcs->reset_ras_error_count(adev);

	r = amdgpu_gmc_ras_late_init(adev);
	if (r)
		return r;

	return amdgpu_irq_get(adev, &adev->gmc.vm_fault, 0);
}

static void gmc_v9_0_vram_gtt_location(struct amdgpu_device *adev,
					struct amdgpu_gmc *mc)
{
	u64 base = 0;

	if (!amdgpu_sriov_vf(adev))
		base = adev->mmhub.funcs->get_fb_location(adev);

	/* add the xgmi offset of the physical node */
	base += adev->gmc.xgmi.physical_node_id * adev->gmc.xgmi.node_segment_size;
	amdgpu_gmc_vram_location(adev, mc, base);
	amdgpu_gmc_gart_location(adev, mc);
	amdgpu_gmc_agp_location(adev, mc);
	/* base offset of vram pages */
	adev->vm_manager.vram_base_offset = gfxhub_v1_0_get_mc_fb_offset(adev);

	/* XXX: add the xgmi offset of the physical node? */
	adev->vm_manager.vram_base_offset +=
		adev->gmc.xgmi.physical_node_id * adev->gmc.xgmi.node_segment_size;
}

/**
 * gmc_v9_0_mc_init - initialize the memory controller driver params
 *
 * @adev: amdgpu_device pointer
 *
 * Look up the amount of vram, vram width, and decide how to place
 * vram and gart within the GPU's physical address space.
 * Returns 0 for success.
 */
static int gmc_v9_0_mc_init(struct amdgpu_device *adev)
{
	int r;

	/* size in MB on si */
	adev->gmc.mc_vram_size =
		adev->nbio.funcs->get_memsize(adev) * 1024ULL * 1024ULL;
	adev->gmc.real_vram_size = adev->gmc.mc_vram_size;

	if (!(adev->flags & AMD_IS_APU)) {
		r = amdgpu_device_resize_fb_bar(adev);
		if (r)
			return r;
	}
	adev->gmc.aper_base = pci_resource_start(adev->pdev, 0);
	adev->gmc.aper_size = pci_resource_len(adev->pdev, 0);

#ifdef CONFIG_X86_64
	if (adev->flags & AMD_IS_APU) {
		adev->gmc.aper_base = gfxhub_v1_0_get_mc_fb_offset(adev);
		adev->gmc.aper_size = adev->gmc.real_vram_size;
	}
#endif
	/* In case the PCI BAR is larger than the actual amount of vram */
	adev->gmc.visible_vram_size = adev->gmc.aper_size;
	if (adev->gmc.visible_vram_size > adev->gmc.real_vram_size)
		adev->gmc.visible_vram_size = adev->gmc.real_vram_size;

	/* set the gart size */
	if (amdgpu_gart_size == -1) {
		switch (adev->asic_type) {
		case CHIP_VEGA10:  /* all engines support GPUVM */
		case CHIP_VEGA12:  /* all engines support GPUVM */
		case CHIP_VEGA20:
		case CHIP_ARCTURUS:
		default:
			adev->gmc.gart_size = 512ULL << 20;
			break;
		case CHIP_RAVEN:   /* DCE SG support */
		case CHIP_RENOIR:
			adev->gmc.gart_size = 1024ULL << 20;
			break;
		}
	} else {
		adev->gmc.gart_size = (u64)amdgpu_gart_size << 20;
	}

	gmc_v9_0_vram_gtt_location(adev, &adev->gmc);

	return 0;
}

static int gmc_v9_0_gart_init(struct amdgpu_device *adev)
{
	int r;

	if (adev->gart.bo) {
		WARN(1, "VEGA10 PCIE GART already initialized\n");
		return 0;
	}
	/* Initialize common gart structure */
	r = amdgpu_gart_init(adev);
	if (r)
		return r;
	adev->gart.table_size = adev->gart.num_gpu_pages * 8;
	adev->gart.gart_pte_flags = AMDGPU_PTE_MTYPE_VG10(MTYPE_UC) |
				 AMDGPU_PTE_EXECUTABLE;
	return amdgpu_gart_table_vram_alloc(adev);
}

static int gmc_v9_0_sw_init(void *handle)
{
	int r, vram_width = 0, vram_type = 0, vram_vendor = 0;
	struct amdgpu_device *adev = (struct amdgpu_device *)handle;

	gfxhub_v1_0_init(adev);

	adev->mmhub.funcs->init(adev);

	spin_lock_init(&adev->gmc.invalidate_lock);

	r = amdgpu_atomfirmware_get_vram_info(adev,
		&vram_width, &vram_type, &vram_vendor);
	if (amdgpu_sriov_vf(adev))
		/* For Vega10 SR-IOV, vram_width can't be read from ATOM as RAVEN,
		 * and DF related registers is not readable, seems hardcord is the
		 * only way to set the correct vram_width
		 */
		adev->gmc.vram_width = 2048;
	else if (amdgpu_emu_mode != 1)
		adev->gmc.vram_width = vram_width;

	if (!adev->gmc.vram_width) {
		int chansize, numchan;

		/* hbm memory channel size */
		if (adev->flags & AMD_IS_APU)
			chansize = 64;
		else
			chansize = 128;

		numchan = adev->df.funcs->get_hbm_channel_number(adev);
		adev->gmc.vram_width = numchan * chansize;
	}

	adev->gmc.vram_type = vram_type;
	adev->gmc.vram_vendor = vram_vendor;
	switch (adev->asic_type) {
	case CHIP_RAVEN:
		adev->num_vmhubs = 2;

		if (adev->rev_id == 0x0 || adev->rev_id == 0x1) {
			amdgpu_vm_adjust_size(adev, 256 * 1024, 9, 3, 48);
		} else {
			/* vm_size is 128TB + 512GB for legacy 3-level page support */
			amdgpu_vm_adjust_size(adev, 128 * 1024 + 512, 9, 2, 48);
			adev->gmc.translate_further =
				adev->vm_manager.num_level > 1;
		}
		break;
	case CHIP_VEGA10:
	case CHIP_VEGA12:
	case CHIP_VEGA20:
	case CHIP_RENOIR:
		adev->num_vmhubs = 2;


		/*
		 * To fulfill 4-level page support,
		 * vm size is 256TB (48bit), maximum size of Vega10,
		 * block size 512 (9bit)
		 */
		/* sriov restrict max_pfn below AMDGPU_GMC_HOLE */
		if (amdgpu_sriov_vf(adev))
			amdgpu_vm_adjust_size(adev, 256 * 1024, 9, 3, 47);
		else
			amdgpu_vm_adjust_size(adev, 256 * 1024, 9, 3, 48);
		break;
	case CHIP_ARCTURUS:
		adev->num_vmhubs = 3;

		/* Keep the vm size same with Vega20 */
		amdgpu_vm_adjust_size(adev, 256 * 1024, 9, 3, 48);
		break;
	default:
		break;
	}

	/* This interrupt is VMC page fault.*/
	r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_VMC, VMC_1_0__SRCID__VM_FAULT,
				&adev->gmc.vm_fault);
	if (r)
		return r;

	if (adev->asic_type == CHIP_ARCTURUS) {
		r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_VMC1, VMC_1_0__SRCID__VM_FAULT,
					&adev->gmc.vm_fault);
		if (r)
			return r;
	}

	r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_UTCL2, UTCL2_1_0__SRCID__FAULT,
				&adev->gmc.vm_fault);

	if (r)
		return r;

	if (!amdgpu_sriov_vf(adev)) {
		/* interrupt sent to DF. */
		r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_DF, 0,
				      &adev->gmc.ecc_irq);
		if (r)
			return r;
	}

	/* Set the internal MC address mask
	 * This is the max address of the GPU's
	 * internal address space.
	 */
	adev->gmc.mc_mask = 0xffffffffffffULL; /* 48 bit MC */

	r = dma_set_mask_and_coherent(adev->dev, DMA_BIT_MASK(44));
	if (r) {
		printk(KERN_WARNING "amdgpu: No suitable DMA available.\n");
		return r;
	}
	adev->need_swiotlb = drm_need_swiotlb(44);

	if (adev->gmc.xgmi.supported) {
		r = gfxhub_v1_1_get_xgmi_info(adev);
		if (r)
			return r;
	}

	r = gmc_v9_0_mc_init(adev);
	if (r)
		return r;

	amdgpu_gmc_get_vbios_allocations(adev);

	/* Memory manager */
	r = amdgpu_bo_init(adev);
	if (r)
		return r;

	r = gmc_v9_0_gart_init(adev);
	if (r)
		return r;

	/*
	 * number of VMs
	 * VMID 0 is reserved for System
	 * amdgpu graphics/compute will use VMIDs 1..n-1
	 * amdkfd will use VMIDs n..15
	 *
	 * The first KFD VMID is 8 for GPUs with graphics, 3 for
	 * compute-only GPUs. On compute-only GPUs that leaves 2 VMIDs
	 * for video processing.
	 */
	adev->vm_manager.first_kfd_vmid =
		adev->asic_type == CHIP_ARCTURUS ? 3 : 8;

	amdgpu_vm_manager_init(adev);

	return 0;
}

static int gmc_v9_0_sw_fini(void *handle)
{
	struct amdgpu_device *adev = (struct amdgpu_device *)handle;

	amdgpu_gmc_ras_fini(adev);
	amdgpu_gem_force_release(adev);
	amdgpu_vm_manager_fini(adev);
	amdgpu_gart_table_vram_free(adev);
	amdgpu_bo_fini(adev);
	amdgpu_gart_fini(adev);

	return 0;
}

static void gmc_v9_0_init_golden_registers(struct amdgpu_device *adev)
{

	switch (adev->asic_type) {
	case CHIP_VEGA10:
		if (amdgpu_sriov_vf(adev))
			break;
		/* fall through */
	case CHIP_VEGA20:
		soc15_program_register_sequence(adev,
						golden_settings_mmhub_1_0_0,
						ARRAY_SIZE(golden_settings_mmhub_1_0_0));
		soc15_program_register_sequence(adev,
						golden_settings_athub_1_0_0,
						ARRAY_SIZE(golden_settings_athub_1_0_0));
		break;
	case CHIP_VEGA12:
		break;
	case CHIP_RAVEN:
		/* TODO for renoir */
		soc15_program_register_sequence(adev,
						golden_settings_athub_1_0_0,
						ARRAY_SIZE(golden_settings_athub_1_0_0));
		break;
	default:
		break;
	}
}

/**
 * gmc_v9_0_restore_registers - restores regs
 *
 * @adev: amdgpu_device pointer
 *
 * This restores register values, saved at suspend.
 */
static void gmc_v9_0_restore_registers(struct amdgpu_device *adev)
{
	if (adev->asic_type == CHIP_RAVEN)
		WREG32(mmDCHUBBUB_SDPIF_MMIO_CNTRL_0, adev->gmc.sdpif_register);
}

/**
 * gmc_v9_0_gart_enable - gart enable
 *
 * @adev: amdgpu_device pointer
 */
static int gmc_v9_0_gart_enable(struct amdgpu_device *adev)
{
	int r;

	if (adev->gart.bo == NULL) {
		dev_err(adev->dev, "No VRAM object for PCIE GART.\n");
		return -EINVAL;
	}
	r = amdgpu_gart_table_vram_pin(adev);
	if (r)
		return r;

	r = gfxhub_v1_0_gart_enable(adev);
	if (r)
		return r;

	r = adev->mmhub.funcs->gart_enable(adev);
	if (r)
		return r;

	DRM_INFO("PCIE GART of %uM enabled (table at 0x%016llX).\n",
		 (unsigned)(adev->gmc.gart_size >> 20),
		 (unsigned long long)amdgpu_bo_gpu_offset(adev->gart.bo));
	adev->gart.ready = true;
	return 0;
}

static int gmc_v9_0_hw_init(void *handle)
{
	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
	bool value;
	int r, i;
	u32 tmp;

	/* The sequence of these two function calls matters.*/
	gmc_v9_0_init_golden_registers(adev);

	if (adev->mode_info.num_crtc) {
		if (adev->asic_type != CHIP_ARCTURUS) {
			/* Lockout access through VGA aperture*/
			WREG32_FIELD15(DCE, 0, VGA_HDP_CONTROL, VGA_MEMORY_DISABLE, 1);

			/* disable VGA render */
			WREG32_FIELD15(DCE, 0, VGA_RENDER_CONTROL, VGA_VSTATUS_CNTL, 0);
		}
	}

	amdgpu_device_program_register_sequence(adev,
						golden_settings_vega10_hdp,
						ARRAY_SIZE(golden_settings_vega10_hdp));

	if (adev->mmhub.funcs->update_power_gating)
		adev->mmhub.funcs->update_power_gating(adev, true);

	switch (adev->asic_type) {
	case CHIP_ARCTURUS:
		WREG32_FIELD15(HDP, 0, HDP_MMHUB_CNTL, HDP_MMHUB_GCC, 1);
		break;
	default:
		break;
	}

	WREG32_FIELD15(HDP, 0, HDP_MISC_CNTL, FLUSH_INVALIDATE_CACHE, 1);

	tmp = RREG32_SOC15(HDP, 0, mmHDP_HOST_PATH_CNTL);
	WREG32_SOC15(HDP, 0, mmHDP_HOST_PATH_CNTL, tmp);

	WREG32_SOC15(HDP, 0, mmHDP_NONSURFACE_BASE, (adev->gmc.vram_start >> 8));
	WREG32_SOC15(HDP, 0, mmHDP_NONSURFACE_BASE_HI, (adev->gmc.vram_start >> 40));

	/* After HDP is initialized, flush HDP.*/
	adev->nbio.funcs->hdp_flush(adev, NULL);

	if (amdgpu_vm_fault_stop == AMDGPU_VM_FAULT_STOP_ALWAYS)
		value = false;
	else
		value = true;

	if (!amdgpu_sriov_vf(adev)) {
		gfxhub_v1_0_set_fault_enable_default(adev, value);
		adev->mmhub.funcs->set_fault_enable_default(adev, value);
	}
	for (i = 0; i < adev->num_vmhubs; ++i)
		gmc_v9_0_flush_gpu_tlb(adev, 0, i, 0);

	if (adev->umc.funcs && adev->umc.funcs->init_registers)
		adev->umc.funcs->init_registers(adev);

	r = gmc_v9_0_gart_enable(adev);

	return r;
}

/**
 * gmc_v9_0_save_registers - saves regs
 *
 * @adev: amdgpu_device pointer
 *
 * This saves potential register values that should be
 * restored upon resume
 */
static void gmc_v9_0_save_registers(struct amdgpu_device *adev)
{
	if (adev->asic_type == CHIP_RAVEN)
		adev->gmc.sdpif_register = RREG32(mmDCHUBBUB_SDPIF_MMIO_CNTRL_0);
}

/**
 * gmc_v9_0_gart_disable - gart disable
 *
 * @adev: amdgpu_device pointer
 *
 * This disables all VM page table.
 */
static void gmc_v9_0_gart_disable(struct amdgpu_device *adev)
{
	gfxhub_v1_0_gart_disable(adev);
	adev->mmhub.funcs->gart_disable(adev);
	amdgpu_gart_table_vram_unpin(adev);
}

static int gmc_v9_0_hw_fini(void *handle)
{
	struct amdgpu_device *adev = (struct amdgpu_device *)handle;

	if (amdgpu_sriov_vf(adev)) {
		/* full access mode, so don't touch any GMC register */
		DRM_DEBUG("For SRIOV client, shouldn't do anything.\n");
		return 0;
	}

	amdgpu_irq_put(adev, &adev->gmc.ecc_irq, 0);
	amdgpu_irq_put(adev, &adev->gmc.vm_fault, 0);
	gmc_v9_0_gart_disable(adev);

	return 0;
}

static int gmc_v9_0_suspend(void *handle)
{
	int r;
	struct amdgpu_device *adev = (struct amdgpu_device *)handle;

	r = gmc_v9_0_hw_fini(adev);
	if (r)
		return r;

	gmc_v9_0_save_registers(adev);

	return 0;
}

static int gmc_v9_0_resume(void *handle)
{
	int r;
	struct amdgpu_device *adev = (struct amdgpu_device *)handle;

	gmc_v9_0_restore_registers(adev);
	r = gmc_v9_0_hw_init(adev);
	if (r)
		return r;

	amdgpu_vmid_reset_all(adev);

	return 0;
}

static bool gmc_v9_0_is_idle(void *handle)
{
	/* MC is always ready in GMC v9.*/
	return true;
}

static int gmc_v9_0_wait_for_idle(void *handle)
{
	/* There is no need to wait for MC idle in GMC v9.*/
	return 0;
}

static int gmc_v9_0_soft_reset(void *handle)
{
	/* XXX for emulation.*/
	return 0;
}

static int gmc_v9_0_set_clockgating_state(void *handle,
					enum amd_clockgating_state state)
{
	struct amdgpu_device *adev = (struct amdgpu_device *)handle;

	adev->mmhub.funcs->set_clockgating(adev, state);

	athub_v1_0_set_clockgating(adev, state);

	return 0;
}

static void gmc_v9_0_get_clockgating_state(void *handle, u32 *flags)
{
	struct amdgpu_device *adev = (struct amdgpu_device *)handle;

	adev->mmhub.funcs->get_clockgating(adev, flags);

	athub_v1_0_get_clockgating(adev, flags);
}

static int gmc_v9_0_set_powergating_state(void *handle,
					enum amd_powergating_state state)
{
	return 0;
}

const struct amd_ip_funcs gmc_v9_0_ip_funcs = {
	.name = "gmc_v9_0",
	.early_init = gmc_v9_0_early_init,
	.late_init = gmc_v9_0_late_init,
	.sw_init = gmc_v9_0_sw_init,
	.sw_fini = gmc_v9_0_sw_fini,
	.hw_init = gmc_v9_0_hw_init,
	.hw_fini = gmc_v9_0_hw_fini,
	.suspend = gmc_v9_0_suspend,
	.resume = gmc_v9_0_resume,
	.is_idle = gmc_v9_0_is_idle,
	.wait_for_idle = gmc_v9_0_wait_for_idle,
	.soft_reset = gmc_v9_0_soft_reset,
	.set_clockgating_state = gmc_v9_0_set_clockgating_state,
	.set_powergating_state = gmc_v9_0_set_powergating_state,
	.get_clockgating_state = gmc_v9_0_get_clockgating_state,
};

const struct amdgpu_ip_block_version gmc_v9_0_ip_block =
{
	.type = AMD_IP_BLOCK_TYPE_GMC,
	.major = 9,
	.minor = 0,
	.rev = 0,
	.funcs = &gmc_v9_0_ip_funcs,
};