gpu/drm: ring_mirror_list --> pending_list

[linux.git] / drivers / gpu / drm / amd / amdgpu / amdgpu_device.c

/*
 * Copyright 2008 Advanced Micro Devices, Inc.
 * Copyright 2008 Red Hat Inc.
 * Copyright 2009 Jerome Glisse.
 *
 * 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.
 *
 * Authors: Dave Airlie
 *          Alex Deucher
 *          Jerome Glisse
 */
#include <linux/power_supply.h>
#include <linux/kthread.h>
#include <linux/module.h>
#include <linux/console.h>
#include <linux/slab.h>

#include <drm/drm_atomic_helper.h>
#include <drm/drm_probe_helper.h>
#include <drm/amdgpu_drm.h>
#include <linux/vgaarb.h>
#include <linux/vga_switcheroo.h>
#include <linux/efi.h>
#include "amdgpu.h"
#include "amdgpu_trace.h"
#include "amdgpu_i2c.h"
#include "atom.h"
#include "amdgpu_atombios.h"
#include "amdgpu_atomfirmware.h"
#include "amd_pcie.h"
#ifdef CONFIG_DRM_AMDGPU_SI
#include "si.h"
#endif
#ifdef CONFIG_DRM_AMDGPU_CIK
#include "cik.h"
#endif
#include "vi.h"
#include "soc15.h"
#include "nv.h"
#include "bif/bif_4_1_d.h"
#include <linux/pci.h>
#include <linux/firmware.h>
#include "amdgpu_vf_error.h"

#include "amdgpu_amdkfd.h"
#include "amdgpu_pm.h"

#include "amdgpu_xgmi.h"
#include "amdgpu_ras.h"
#include "amdgpu_pmu.h"
#include "amdgpu_fru_eeprom.h"

#include <linux/suspend.h>
#include <drm/task_barrier.h>
#include <linux/pm_runtime.h>

MODULE_FIRMWARE("amdgpu/vega10_gpu_info.bin");
MODULE_FIRMWARE("amdgpu/vega12_gpu_info.bin");
MODULE_FIRMWARE("amdgpu/raven_gpu_info.bin");
MODULE_FIRMWARE("amdgpu/picasso_gpu_info.bin");
MODULE_FIRMWARE("amdgpu/raven2_gpu_info.bin");
MODULE_FIRMWARE("amdgpu/arcturus_gpu_info.bin");
MODULE_FIRMWARE("amdgpu/renoir_gpu_info.bin");
MODULE_FIRMWARE("amdgpu/navi10_gpu_info.bin");
MODULE_FIRMWARE("amdgpu/navi14_gpu_info.bin");
MODULE_FIRMWARE("amdgpu/navi12_gpu_info.bin");
MODULE_FIRMWARE("amdgpu/vangogh_gpu_info.bin");
MODULE_FIRMWARE("amdgpu/green_sardine_gpu_info.bin");

#define AMDGPU_RESUME_MS                2000

const char *amdgpu_asic_name[] = {
        "TAHITI",
        "PITCAIRN",
        "VERDE",
        "OLAND",
        "HAINAN",
        "BONAIRE",
        "KAVERI",
        "KABINI",
        "HAWAII",
        "MULLINS",
        "TOPAZ",
        "TONGA",
        "FIJI",
        "CARRIZO",
        "STONEY",
        "POLARIS10",
        "POLARIS11",
        "POLARIS12",
        "VEGAM",
        "VEGA10",
        "VEGA12",
        "VEGA20",
        "RAVEN",
        "ARCTURUS",
        "RENOIR",
        "NAVI10",
        "NAVI14",
        "NAVI12",
        "SIENNA_CICHLID",
        "NAVY_FLOUNDER",
        "VANGOGH",
        "DIMGREY_CAVEFISH",
        "LAST",
};

/**
 * DOC: pcie_replay_count
 *
 * The amdgpu driver provides a sysfs API for reporting the total number
 * of PCIe replays (NAKs)
 * The file pcie_replay_count is used for this and returns the total
 * number of replays as a sum of the NAKs generated and NAKs received
 */

static ssize_t amdgpu_device_get_pcie_replay_count(struct device *dev,
                struct device_attribute *attr, char *buf)
{
        struct drm_device *ddev = dev_get_drvdata(dev);
        struct amdgpu_device *adev = drm_to_adev(ddev);
        uint64_t cnt = amdgpu_asic_get_pcie_replay_count(adev);

        return snprintf(buf, PAGE_SIZE, "%llu\n", cnt);
}

static DEVICE_ATTR(pcie_replay_count, S_IRUGO,
                amdgpu_device_get_pcie_replay_count, NULL);

static void amdgpu_device_get_pcie_info(struct amdgpu_device *adev);

/**
 * DOC: product_name
 *
 * The amdgpu driver provides a sysfs API for reporting the product name
 * for the device
 * The file serial_number is used for this and returns the product name
 * as returned from the FRU.
 * NOTE: This is only available for certain server cards
 */

static ssize_t amdgpu_device_get_product_name(struct device *dev,
                struct device_attribute *attr, char *buf)
{
        struct drm_device *ddev = dev_get_drvdata(dev);
        struct amdgpu_device *adev = drm_to_adev(ddev);

        return snprintf(buf, PAGE_SIZE, "%s\n", adev->product_name);
}

static DEVICE_ATTR(product_name, S_IRUGO,
                amdgpu_device_get_product_name, NULL);

/**
 * DOC: product_number
 *
 * The amdgpu driver provides a sysfs API for reporting the part number
 * for the device
 * The file serial_number is used for this and returns the part number
 * as returned from the FRU.
 * NOTE: This is only available for certain server cards
 */

static ssize_t amdgpu_device_get_product_number(struct device *dev,
                struct device_attribute *attr, char *buf)
{
        struct drm_device *ddev = dev_get_drvdata(dev);
        struct amdgpu_device *adev = drm_to_adev(ddev);

        return snprintf(buf, PAGE_SIZE, "%s\n", adev->product_number);
}

static DEVICE_ATTR(product_number, S_IRUGO,
                amdgpu_device_get_product_number, NULL);

/**
 * DOC: serial_number
 *
 * The amdgpu driver provides a sysfs API for reporting the serial number
 * for the device
 * The file serial_number is used for this and returns the serial number
 * as returned from the FRU.
 * NOTE: This is only available for certain server cards
 */

static ssize_t amdgpu_device_get_serial_number(struct device *dev,
                struct device_attribute *attr, char *buf)
{
        struct drm_device *ddev = dev_get_drvdata(dev);
        struct amdgpu_device *adev = drm_to_adev(ddev);

        return snprintf(buf, PAGE_SIZE, "%s\n", adev->serial);
}

static DEVICE_ATTR(serial_number, S_IRUGO,
                amdgpu_device_get_serial_number, NULL);

/**
 * amdgpu_device_supports_boco - Is the device a dGPU with HG/PX power control
 *
 * @dev: drm_device pointer
 *
 * Returns true if the device is a dGPU with HG/PX power control,
 * otherwise return false.
 */
bool amdgpu_device_supports_boco(struct drm_device *dev)
{
        struct amdgpu_device *adev = drm_to_adev(dev);

        if (adev->flags & AMD_IS_PX)
                return true;
        return false;
}

/**
 * amdgpu_device_supports_baco - Does the device support BACO
 *
 * @dev: drm_device pointer
 *
 * Returns true if the device supporte BACO,
 * otherwise return false.
 */
bool amdgpu_device_supports_baco(struct drm_device *dev)
{
        struct amdgpu_device *adev = drm_to_adev(dev);

        return amdgpu_asic_supports_baco(adev);
}

/*
 * VRAM access helper functions
 */

/**
 * amdgpu_device_vram_access - read/write a buffer in vram
 *
 * @adev: amdgpu_device pointer
 * @pos: offset of the buffer in vram
 * @buf: virtual address of the buffer in system memory
 * @size: read/write size, sizeof(@buf) must > @size
 * @write: true - write to vram, otherwise - read from vram
 */
void amdgpu_device_vram_access(struct amdgpu_device *adev, loff_t pos,
                               uint32_t *buf, size_t size, bool write)
{
        unsigned long flags;
        uint32_t hi = ~0;
        uint64_t last;


#ifdef CONFIG_64BIT
        last = min(pos + size, adev->gmc.visible_vram_size);
        if (last > pos) {
                void __iomem *addr = adev->mman.aper_base_kaddr + pos;
                size_t count = last - pos;

                if (write) {
                        memcpy_toio(addr, buf, count);
                        mb();
                        amdgpu_asic_flush_hdp(adev, NULL);
                } else {
                        amdgpu_asic_invalidate_hdp(adev, NULL);
                        mb();
                        memcpy_fromio(buf, addr, count);
                }

                if (count == size)
                        return;

                pos += count;
                buf += count / 4;
                size -= count;
        }
#endif

        spin_lock_irqsave(&adev->mmio_idx_lock, flags);
        for (last = pos + size; pos < last; pos += 4) {
                uint32_t tmp = pos >> 31;

                WREG32_NO_KIQ(mmMM_INDEX, ((uint32_t)pos) | 0x80000000);
                if (tmp != hi) {
                        WREG32_NO_KIQ(mmMM_INDEX_HI, tmp);
                        hi = tmp;
                }
                if (write)
                        WREG32_NO_KIQ(mmMM_DATA, *buf++);
                else
                        *buf++ = RREG32_NO_KIQ(mmMM_DATA);
        }
        spin_unlock_irqrestore(&adev->mmio_idx_lock, flags);
}

/*
 * register access helper functions.
 */
/**
 * amdgpu_device_rreg - read a memory mapped IO or indirect register
 *
 * @adev: amdgpu_device pointer
 * @reg: dword aligned register offset
 * @acc_flags: access flags which require special behavior
 *
 * Returns the 32 bit value from the offset specified.
 */
uint32_t amdgpu_device_rreg(struct amdgpu_device *adev,
                            uint32_t reg, uint32_t acc_flags)
{
        uint32_t ret;

        if (adev->in_pci_err_recovery)
                return 0;

        if ((reg * 4) < adev->rmmio_size) {
                if (!(acc_flags & AMDGPU_REGS_NO_KIQ) &&
                    amdgpu_sriov_runtime(adev) &&
                    down_read_trylock(&adev->reset_sem)) {
                        ret = amdgpu_kiq_rreg(adev, reg);
                        up_read(&adev->reset_sem);
                } else {
                        ret = readl(((void __iomem *)adev->rmmio) + (reg * 4));
                }
        } else {
                ret = adev->pcie_rreg(adev, reg * 4);
        }

        trace_amdgpu_device_rreg(adev->pdev->device, reg, ret);

        return ret;
}

/*
 * MMIO register read with bytes helper functions
 * @offset:bytes offset from MMIO start
 *
*/

/**
 * amdgpu_mm_rreg8 - read a memory mapped IO register
 *
 * @adev: amdgpu_device pointer
 * @offset: byte aligned register offset
 *
 * Returns the 8 bit value from the offset specified.
 */
uint8_t amdgpu_mm_rreg8(struct amdgpu_device *adev, uint32_t offset)
{
        if (adev->in_pci_err_recovery)
                return 0;

        if (offset < adev->rmmio_size)
                return (readb(adev->rmmio + offset));
        BUG();
}

/*
 * MMIO register write with bytes helper functions
 * @offset:bytes offset from MMIO start
 * @value: the value want to be written to the register
 *
*/
/**
 * amdgpu_mm_wreg8 - read a memory mapped IO register
 *
 * @adev: amdgpu_device pointer
 * @offset: byte aligned register offset
 * @value: 8 bit value to write
 *
 * Writes the value specified to the offset specified.
 */
void amdgpu_mm_wreg8(struct amdgpu_device *adev, uint32_t offset, uint8_t value)
{
        if (adev->in_pci_err_recovery)
                return;

        if (offset < adev->rmmio_size)
                writeb(value, adev->rmmio + offset);
        else
                BUG();
}

/**
 * amdgpu_device_wreg - write to a memory mapped IO or indirect register
 *
 * @adev: amdgpu_device pointer
 * @reg: dword aligned register offset
 * @v: 32 bit value to write to the register
 * @acc_flags: access flags which require special behavior
 *
 * Writes the value specified to the offset specified.
 */
void amdgpu_device_wreg(struct amdgpu_device *adev,
                        uint32_t reg, uint32_t v,
                        uint32_t acc_flags)
{
        if (adev->in_pci_err_recovery)
                return;

        if ((reg * 4) < adev->rmmio_size) {
                if (!(acc_flags & AMDGPU_REGS_NO_KIQ) &&
                    amdgpu_sriov_runtime(adev) &&
                    down_read_trylock(&adev->reset_sem)) {
                        amdgpu_kiq_wreg(adev, reg, v);
                        up_read(&adev->reset_sem);
                } else {
                        writel(v, ((void __iomem *)adev->rmmio) + (reg * 4));
                }
        } else {
                adev->pcie_wreg(adev, reg * 4, v);
        }

        trace_amdgpu_device_wreg(adev->pdev->device, reg, v);
}

/*
 * amdgpu_mm_wreg_mmio_rlc -  write register either with mmio or with RLC path if in range
 *
 * this function is invoked only the debugfs register access
 * */
void amdgpu_mm_wreg_mmio_rlc(struct amdgpu_device *adev,
                             uint32_t reg, uint32_t v)
{
        if (adev->in_pci_err_recovery)
                return;

        if (amdgpu_sriov_fullaccess(adev) &&
            adev->gfx.rlc.funcs &&
            adev->gfx.rlc.funcs->is_rlcg_access_range) {
                if (adev->gfx.rlc.funcs->is_rlcg_access_range(adev, reg))
                        return adev->gfx.rlc.funcs->rlcg_wreg(adev, reg, v);
        } else {
                writel(v, ((void __iomem *)adev->rmmio) + (reg * 4));
        }
}

/**
 * amdgpu_io_rreg - read an IO register
 *
 * @adev: amdgpu_device pointer
 * @reg: dword aligned register offset
 *
 * Returns the 32 bit value from the offset specified.
 */
u32 amdgpu_io_rreg(struct amdgpu_device *adev, u32 reg)
{
        if (adev->in_pci_err_recovery)
                return 0;

        if ((reg * 4) < adev->rio_mem_size)
                return ioread32(adev->rio_mem + (reg * 4));
        else {
                iowrite32((reg * 4), adev->rio_mem + (mmMM_INDEX * 4));
                return ioread32(adev->rio_mem + (mmMM_DATA * 4));
        }
}

/**
 * amdgpu_io_wreg - write to an IO register
 *
 * @adev: amdgpu_device pointer
 * @reg: dword aligned register offset
 * @v: 32 bit value to write to the register
 *
 * Writes the value specified to the offset specified.
 */
void amdgpu_io_wreg(struct amdgpu_device *adev, u32 reg, u32 v)
{
        if (adev->in_pci_err_recovery)
                return;

        if ((reg * 4) < adev->rio_mem_size)
                iowrite32(v, adev->rio_mem + (reg * 4));
        else {
                iowrite32((reg * 4), adev->rio_mem + (mmMM_INDEX * 4));
                iowrite32(v, adev->rio_mem + (mmMM_DATA * 4));
        }
}

/**
 * amdgpu_mm_rdoorbell - read a doorbell dword
 *
 * @adev: amdgpu_device pointer
 * @index: doorbell index
 *
 * Returns the value in the doorbell aperture at the
 * requested doorbell index (CIK).
 */
u32 amdgpu_mm_rdoorbell(struct amdgpu_device *adev, u32 index)
{
        if (adev->in_pci_err_recovery)
                return 0;

        if (index < adev->doorbell.num_doorbells) {
                return readl(adev->doorbell.ptr + index);
        } else {
                DRM_ERROR("reading beyond doorbell aperture: 0x%08x!\n", index);
                return 0;
        }
}

/**
 * amdgpu_mm_wdoorbell - write a doorbell dword
 *
 * @adev: amdgpu_device pointer
 * @index: doorbell index
 * @v: value to write
 *
 * Writes @v to the doorbell aperture at the
 * requested doorbell index (CIK).
 */
void amdgpu_mm_wdoorbell(struct amdgpu_device *adev, u32 index, u32 v)
{
        if (adev->in_pci_err_recovery)
                return;

        if (index < adev->doorbell.num_doorbells) {
                writel(v, adev->doorbell.ptr + index);
        } else {
                DRM_ERROR("writing beyond doorbell aperture: 0x%08x!\n", index);
        }
}

/**
 * amdgpu_mm_rdoorbell64 - read a doorbell Qword
 *
 * @adev: amdgpu_device pointer
 * @index: doorbell index
 *
 * Returns the value in the doorbell aperture at the
 * requested doorbell index (VEGA10+).
 */
u64 amdgpu_mm_rdoorbell64(struct amdgpu_device *adev, u32 index)
{
        if (adev->in_pci_err_recovery)
                return 0;

        if (index < adev->doorbell.num_doorbells) {
                return atomic64_read((atomic64_t *)(adev->doorbell.ptr + index));
        } else {
                DRM_ERROR("reading beyond doorbell aperture: 0x%08x!\n", index);
                return 0;
        }
}

/**
 * amdgpu_mm_wdoorbell64 - write a doorbell Qword
 *
 * @adev: amdgpu_device pointer
 * @index: doorbell index
 * @v: value to write
 *
 * Writes @v to the doorbell aperture at the
 * requested doorbell index (VEGA10+).
 */
void amdgpu_mm_wdoorbell64(struct amdgpu_device *adev, u32 index, u64 v)
{
        if (adev->in_pci_err_recovery)
                return;

        if (index < adev->doorbell.num_doorbells) {
                atomic64_set((atomic64_t *)(adev->doorbell.ptr + index), v);
        } else {
                DRM_ERROR("writing beyond doorbell aperture: 0x%08x!\n", index);
        }
}

/**
 * amdgpu_device_indirect_rreg - read an indirect register
 *
 * @adev: amdgpu_device pointer
 * @pcie_index: mmio register offset
 * @pcie_data: mmio register offset
 *
 * Returns the value of indirect register @reg_addr
 */
u32 amdgpu_device_indirect_rreg(struct amdgpu_device *adev,
                                u32 pcie_index, u32 pcie_data,
                                u32 reg_addr)
{
        unsigned long flags;
        u32 r;
        void __iomem *pcie_index_offset;
        void __iomem *pcie_data_offset;

        spin_lock_irqsave(&adev->pcie_idx_lock, flags);
        pcie_index_offset = (void __iomem *)adev->rmmio + pcie_index * 4;
        pcie_data_offset = (void __iomem *)adev->rmmio + pcie_data * 4;

        writel(reg_addr, pcie_index_offset);
        readl(pcie_index_offset);
        r = readl(pcie_data_offset);
        spin_unlock_irqrestore(&adev->pcie_idx_lock, flags);

        return r;
}

/**
 * amdgpu_device_indirect_rreg64 - read a 64bits indirect register
 *
 * @adev: amdgpu_device pointer
 * @pcie_index: mmio register offset
 * @pcie_data: mmio register offset
 *
 * Returns the value of indirect register @reg_addr
 */
u64 amdgpu_device_indirect_rreg64(struct amdgpu_device *adev,
                                  u32 pcie_index, u32 pcie_data,
                                  u32 reg_addr)
{
        unsigned long flags;
        u64 r;
        void __iomem *pcie_index_offset;
        void __iomem *pcie_data_offset;

        spin_lock_irqsave(&adev->pcie_idx_lock, flags);
        pcie_index_offset = (void __iomem *)adev->rmmio + pcie_index * 4;
        pcie_data_offset = (void __iomem *)adev->rmmio + pcie_data * 4;

        /* read low 32 bits */
        writel(reg_addr, pcie_index_offset);
        readl(pcie_index_offset);
        r = readl(pcie_data_offset);
        /* read high 32 bits */
        writel(reg_addr + 4, pcie_index_offset);
        readl(pcie_index_offset);
        r |= ((u64)readl(pcie_data_offset) << 32);
        spin_unlock_irqrestore(&adev->pcie_idx_lock, flags);

        return r;
}

/**
 * amdgpu_device_indirect_wreg - write an indirect register address
 *
 * @adev: amdgpu_device pointer
 * @pcie_index: mmio register offset
 * @pcie_data: mmio register offset
 * @reg_addr: indirect register offset
 * @reg_data: indirect register data
 *
 */
void amdgpu_device_indirect_wreg(struct amdgpu_device *adev,
                                 u32 pcie_index, u32 pcie_data,
                                 u32 reg_addr, u32 reg_data)
{
        unsigned long flags;
        void __iomem *pcie_index_offset;
        void __iomem *pcie_data_offset;

        spin_lock_irqsave(&adev->pcie_idx_lock, flags);
        pcie_index_offset = (void __iomem *)adev->rmmio + pcie_index * 4;
        pcie_data_offset = (void __iomem *)adev->rmmio + pcie_data * 4;

        writel(reg_addr, pcie_index_offset);
        readl(pcie_index_offset);
        writel(reg_data, pcie_data_offset);
        readl(pcie_data_offset);
        spin_unlock_irqrestore(&adev->pcie_idx_lock, flags);
}

/**
 * amdgpu_device_indirect_wreg64 - write a 64bits indirect register address
 *
 * @adev: amdgpu_device pointer
 * @pcie_index: mmio register offset
 * @pcie_data: mmio register offset
 * @reg_addr: indirect register offset
 * @reg_data: indirect register data
 *
 */
void amdgpu_device_indirect_wreg64(struct amdgpu_device *adev,
                                   u32 pcie_index, u32 pcie_data,
                                   u32 reg_addr, u64 reg_data)
{
        unsigned long flags;
        void __iomem *pcie_index_offset;
        void __iomem *pcie_data_offset;

        spin_lock_irqsave(&adev->pcie_idx_lock, flags);
        pcie_index_offset = (void __iomem *)adev->rmmio + pcie_index * 4;
        pcie_data_offset = (void __iomem *)adev->rmmio + pcie_data * 4;

        /* write low 32 bits */
        writel(reg_addr, pcie_index_offset);
        readl(pcie_index_offset);
        writel((u32)(reg_data & 0xffffffffULL), pcie_data_offset);
        readl(pcie_data_offset);
        /* write high 32 bits */
        writel(reg_addr + 4, pcie_index_offset);
        readl(pcie_index_offset);
        writel((u32)(reg_data >> 32), pcie_data_offset);
        readl(pcie_data_offset);
        spin_unlock_irqrestore(&adev->pcie_idx_lock, flags);
}

/**
 * amdgpu_invalid_rreg - dummy reg read function
 *
 * @adev: amdgpu_device pointer
 * @reg: offset of register
 *
 * Dummy register read function.  Used for register blocks
 * that certain asics don't have (all asics).
 * Returns the value in the register.
 */
static uint32_t amdgpu_invalid_rreg(struct amdgpu_device *adev, uint32_t reg)
{
        DRM_ERROR("Invalid callback to read register 0x%04X\n", reg);
        BUG();
        return 0;
}

/**
 * amdgpu_invalid_wreg - dummy reg write function
 *
 * @adev: amdgpu_device pointer
 * @reg: offset of register
 * @v: value to write to the register
 *
 * Dummy register read function.  Used for register blocks
 * that certain asics don't have (all asics).
 */
static void amdgpu_invalid_wreg(struct amdgpu_device *adev, uint32_t reg, uint32_t v)
{
        DRM_ERROR("Invalid callback to write register 0x%04X with 0x%08X\n",
                  reg, v);
        BUG();
}

/**
 * amdgpu_invalid_rreg64 - dummy 64 bit reg read function
 *
 * @adev: amdgpu_device pointer
 * @reg: offset of register
 *
 * Dummy register read function.  Used for register blocks
 * that certain asics don't have (all asics).
 * Returns the value in the register.
 */
static uint64_t amdgpu_invalid_rreg64(struct amdgpu_device *adev, uint32_t reg)
{
        DRM_ERROR("Invalid callback to read 64 bit register 0x%04X\n", reg);
        BUG();
        return 0;
}

/**
 * amdgpu_invalid_wreg64 - dummy reg write function
 *
 * @adev: amdgpu_device pointer
 * @reg: offset of register
 * @v: value to write to the register
 *
 * Dummy register read function.  Used for register blocks
 * that certain asics don't have (all asics).
 */
static void amdgpu_invalid_wreg64(struct amdgpu_device *adev, uint32_t reg, uint64_t v)
{
        DRM_ERROR("Invalid callback to write 64 bit register 0x%04X with 0x%08llX\n",
                  reg, v);
        BUG();
}

/**
 * amdgpu_block_invalid_rreg - dummy reg read function
 *
 * @adev: amdgpu_device pointer
 * @block: offset of instance
 * @reg: offset of register
 *
 * Dummy register read function.  Used for register blocks
 * that certain asics don't have (all asics).
 * Returns the value in the register.
 */
static uint32_t amdgpu_block_invalid_rreg(struct amdgpu_device *adev,
                                          uint32_t block, uint32_t reg)
{
        DRM_ERROR("Invalid callback to read register 0x%04X in block 0x%04X\n",
                  reg, block);
        BUG();
        return 0;
}

/**
 * amdgpu_block_invalid_wreg - dummy reg write function
 *
 * @adev: amdgpu_device pointer
 * @block: offset of instance
 * @reg: offset of register
 * @v: value to write to the register
 *
 * Dummy register read function.  Used for register blocks
 * that certain asics don't have (all asics).
 */
static void amdgpu_block_invalid_wreg(struct amdgpu_device *adev,
                                      uint32_t block,
                                      uint32_t reg, uint32_t v)
{
        DRM_ERROR("Invalid block callback to write register 0x%04X in block 0x%04X with 0x%08X\n",
                  reg, block, v);
        BUG();
}

/**
 * amdgpu_device_asic_init - Wrapper for atom asic_init
 *
 * @adev: amdgpu_device pointer
 *
 * Does any asic specific work and then calls atom asic init.
 */
static int amdgpu_device_asic_init(struct amdgpu_device *adev)
{
        amdgpu_asic_pre_asic_init(adev);

        return amdgpu_atom_asic_init(adev->mode_info.atom_context);
}

/**
 * amdgpu_device_vram_scratch_init - allocate the VRAM scratch page
 *
 * @adev: amdgpu_device pointer
 *
 * Allocates a scratch page of VRAM for use by various things in the
 * driver.
 */
static int amdgpu_device_vram_scratch_init(struct amdgpu_device *adev)
{
        return amdgpu_bo_create_kernel(adev, AMDGPU_GPU_PAGE_SIZE,
                                       PAGE_SIZE, AMDGPU_GEM_DOMAIN_VRAM,
                                       &adev->vram_scratch.robj,
                                       &adev->vram_scratch.gpu_addr,
                                       (void **)&adev->vram_scratch.ptr);
}

/**
 * amdgpu_device_vram_scratch_fini - Free the VRAM scratch page
 *
 * @adev: amdgpu_device pointer
 *
 * Frees the VRAM scratch page.
 */
static void amdgpu_device_vram_scratch_fini(struct amdgpu_device *adev)
{
        amdgpu_bo_free_kernel(&adev->vram_scratch.robj, NULL, NULL);
}

/**
 * amdgpu_device_program_register_sequence - program an array of registers.
 *
 * @adev: amdgpu_device pointer
 * @registers: pointer to the register array
 * @array_size: size of the register array
 *
 * Programs an array or registers with and and or masks.
 * This is a helper for setting golden registers.
 */
void amdgpu_device_program_register_sequence(struct amdgpu_device *adev,
                                             const u32 *registers,
                                             const u32 array_size)
{
        u32 tmp, reg, and_mask, or_mask;
        int i;

        if (array_size % 3)
                return;

        for (i = 0; i < array_size; i +=3) {
                reg = registers[i + 0];
                and_mask = registers[i + 1];
                or_mask = registers[i + 2];

                if (and_mask == 0xffffffff) {
                        tmp = or_mask;
                } else {
                        tmp = RREG32(reg);
                        tmp &= ~and_mask;
                        if (adev->family >= AMDGPU_FAMILY_AI)
                                tmp |= (or_mask & and_mask);
                        else
                                tmp |= or_mask;
                }
                WREG32(reg, tmp);
        }
}

/**
 * amdgpu_device_pci_config_reset - reset the GPU
 *
 * @adev: amdgpu_device pointer
 *
 * Resets the GPU using the pci config reset sequence.
 * Only applicable to asics prior to vega10.
 */
void amdgpu_device_pci_config_reset(struct amdgpu_device *adev)
{
        pci_write_config_dword(adev->pdev, 0x7c, AMDGPU_ASIC_RESET_DATA);
}

/*
 * GPU doorbell aperture helpers function.
 */
/**
 * amdgpu_device_doorbell_init - Init doorbell driver information.
 *
 * @adev: amdgpu_device pointer
 *
 * Init doorbell driver information (CIK)
 * Returns 0 on success, error on failure.
 */
static int amdgpu_device_doorbell_init(struct amdgpu_device *adev)
{

        /* No doorbell on SI hardware generation */
        if (adev->asic_type < CHIP_BONAIRE) {
                adev->doorbell.base = 0;
                adev->doorbell.size = 0;
                adev->doorbell.num_doorbells = 0;
                adev->doorbell.ptr = NULL;
                return 0;
        }

        if (pci_resource_flags(adev->pdev, 2) & IORESOURCE_UNSET)
                return -EINVAL;

        amdgpu_asic_init_doorbell_index(adev);

        /* doorbell bar mapping */
        adev->doorbell.base = pci_resource_start(adev->pdev, 2);
        adev->doorbell.size = pci_resource_len(adev->pdev, 2);

        adev->doorbell.num_doorbells = min_t(u32, adev->doorbell.size / sizeof(u32),
                                             adev->doorbell_index.max_assignment+1);
        if (adev->doorbell.num_doorbells == 0)
                return -EINVAL;

        /* For Vega, reserve and map two pages on doorbell BAR since SDMA
         * paging queue doorbell use the second page. The
         * AMDGPU_DOORBELL64_MAX_ASSIGNMENT definition assumes all the
         * doorbells are in the first page. So with paging queue enabled,
         * the max num_doorbells should + 1 page (0x400 in dword)
         */
        if (adev->asic_type >= CHIP_VEGA10)
                adev->doorbell.num_doorbells += 0x400;

        adev->doorbell.ptr = ioremap(adev->doorbell.base,
                                     adev->doorbell.num_doorbells *
                                     sizeof(u32));
        if (adev->doorbell.ptr == NULL)
                return -ENOMEM;

        return 0;
}

/**
 * amdgpu_device_doorbell_fini - Tear down doorbell driver information.
 *
 * @adev: amdgpu_device pointer
 *
 * Tear down doorbell driver information (CIK)
 */
static void amdgpu_device_doorbell_fini(struct amdgpu_device *adev)
{
        iounmap(adev->doorbell.ptr);
        adev->doorbell.ptr = NULL;
}



/*
 * amdgpu_device_wb_*()
 * Writeback is the method by which the GPU updates special pages in memory
 * with the status of certain GPU events (fences, ring pointers,etc.).
 */

/**
 * amdgpu_device_wb_fini - Disable Writeback and free memory
 *
 * @adev: amdgpu_device pointer
 *
 * Disables Writeback and frees the Writeback memory (all asics).
 * Used at driver shutdown.
 */
static void amdgpu_device_wb_fini(struct amdgpu_device *adev)
{
        if (adev->wb.wb_obj) {
                amdgpu_bo_free_kernel(&adev->wb.wb_obj,
                                      &adev->wb.gpu_addr,
                                      (void **)&adev->wb.wb);
                adev->wb.wb_obj = NULL;
        }
}

/**
 * amdgpu_device_wb_init- Init Writeback driver info and allocate memory
 *
 * @adev: amdgpu_device pointer
 *
 * Initializes writeback and allocates writeback memory (all asics).
 * Used at driver startup.
 * Returns 0 on success or an -error on failure.
 */
static int amdgpu_device_wb_init(struct amdgpu_device *adev)
{
        int r;

        if (adev->wb.wb_obj == NULL) {
                /* AMDGPU_MAX_WB * sizeof(uint32_t) * 8 = AMDGPU_MAX_WB 256bit slots */
                r = amdgpu_bo_create_kernel(adev, AMDGPU_MAX_WB * sizeof(uint32_t) * 8,
                                            PAGE_SIZE, AMDGPU_GEM_DOMAIN_GTT,
                                            &adev->wb.wb_obj, &adev->wb.gpu_addr,
                                            (void **)&adev->wb.wb);
                if (r) {
                        dev_warn(adev->dev, "(%d) create WB bo failed\n", r);
                        return r;
                }

                adev->wb.num_wb = AMDGPU_MAX_WB;
                memset(&adev->wb.used, 0, sizeof(adev->wb.used));

                /* clear wb memory */
                memset((char *)adev->wb.wb, 0, AMDGPU_MAX_WB * sizeof(uint32_t) * 8);
        }

        return 0;
}

/**
 * amdgpu_device_wb_get - Allocate a wb entry
 *
 * @adev: amdgpu_device pointer
 * @wb: wb index
 *
 * Allocate a wb slot for use by the driver (all asics).
 * Returns 0 on success or -EINVAL on failure.
 */
int amdgpu_device_wb_get(struct amdgpu_device *adev, u32 *wb)
{
        unsigned long offset = find_first_zero_bit(adev->wb.used, adev->wb.num_wb);

        if (offset < adev->wb.num_wb) {
                __set_bit(offset, adev->wb.used);
                *wb = offset << 3; /* convert to dw offset */
                return 0;
        } else {
                return -EINVAL;
        }
}

/**
 * amdgpu_device_wb_free - Free a wb entry
 *
 * @adev: amdgpu_device pointer
 * @wb: wb index
 *
 * Free a wb slot allocated for use by the driver (all asics)
 */
void amdgpu_device_wb_free(struct amdgpu_device *adev, u32 wb)
{
        wb >>= 3;
        if (wb < adev->wb.num_wb)
                __clear_bit(wb, adev->wb.used);
}

/**
 * amdgpu_device_resize_fb_bar - try to resize FB BAR
 *
 * @adev: amdgpu_device pointer
 *
 * Try to resize FB BAR to make all VRAM CPU accessible. We try very hard not
 * to fail, but if any of the BARs is not accessible after the size we abort
 * driver loading by returning -ENODEV.
 */
int amdgpu_device_resize_fb_bar(struct amdgpu_device *adev)
{
        u64 space_needed = roundup_pow_of_two(adev->gmc.real_vram_size);
        u32 rbar_size = order_base_2(((space_needed >> 20) | 1)) - 1;
        struct pci_bus *root;
        struct resource *res;
        unsigned i;
        u16 cmd;
        int r;

        /* Bypass for VF */
        if (amdgpu_sriov_vf(adev))
                return 0;

        /* skip if the bios has already enabled large BAR */
        if (adev->gmc.real_vram_size &&
            (pci_resource_len(adev->pdev, 0) >= adev->gmc.real_vram_size))
                return 0;

        /* Check if the root BUS has 64bit memory resources */
        root = adev->pdev->bus;
        while (root->parent)
                root = root->parent;

        pci_bus_for_each_resource(root, res, i) {
                if (res && res->flags & (IORESOURCE_MEM | IORESOURCE_MEM_64) &&
                    res->start > 0x100000000ull)
                        break;
        }

        /* Trying to resize is pointless without a root hub window above 4GB */
        if (!res)
                return 0;

        /* Disable memory decoding while we change the BAR addresses and size */
        pci_read_config_word(adev->pdev, PCI_COMMAND, &cmd);
        pci_write_config_word(adev->pdev, PCI_COMMAND,
                              cmd & ~PCI_COMMAND_MEMORY);

        /* Free the VRAM and doorbell BAR, we most likely need to move both. */
        amdgpu_device_doorbell_fini(adev);
        if (adev->asic_type >= CHIP_BONAIRE)
                pci_release_resource(adev->pdev, 2);

        pci_release_resource(adev->pdev, 0);

        r = pci_resize_resource(adev->pdev, 0, rbar_size);
        if (r == -ENOSPC)
                DRM_INFO("Not enough PCI address space for a large BAR.");
        else if (r && r != -ENOTSUPP)
                DRM_ERROR("Problem resizing BAR0 (%d).", r);

        pci_assign_unassigned_bus_resources(adev->pdev->bus);

        /* When the doorbell or fb BAR isn't available we have no chance of
         * using the device.
         */
        r = amdgpu_device_doorbell_init(adev);
        if (r || (pci_resource_flags(adev->pdev, 0) & IORESOURCE_UNSET))
                return -ENODEV;

        pci_write_config_word(adev->pdev, PCI_COMMAND, cmd);

        return 0;
}

/*
 * GPU helpers function.
 */
/**
 * amdgpu_device_need_post - check if the hw need post or not
 *
 * @adev: amdgpu_device pointer
 *
 * Check if the asic has been initialized (all asics) at driver startup
 * or post is needed if  hw reset is performed.
 * Returns true if need or false if not.
 */
bool amdgpu_device_need_post(struct amdgpu_device *adev)
{
        uint32_t reg;

        if (amdgpu_sriov_vf(adev))
                return false;

        if (amdgpu_passthrough(adev)) {
                /* for FIJI: In whole GPU pass-through virtualization case, after VM reboot
                 * some old smc fw still need driver do vPost otherwise gpu hang, while
                 * those smc fw version above 22.15 doesn't have this flaw, so we force
                 * vpost executed for smc version below 22.15
                 */
                if (adev->asic_type == CHIP_FIJI) {
                        int err;
                        uint32_t fw_ver;
                        err = request_firmware(&adev->pm.fw, "amdgpu/fiji_smc.bin", adev->dev);
                        /* force vPost if error occured */
                        if (err)
                                return true;

                        fw_ver = *((uint32_t *)adev->pm.fw->data + 69);
                        if (fw_ver < 0x00160e00)
                                return true;
                }
        }

        if (adev->has_hw_reset) {
                adev->has_hw_reset = false;
                return true;
        }

        /* bios scratch used on CIK+ */
        if (adev->asic_type >= CHIP_BONAIRE)
                return amdgpu_atombios_scratch_need_asic_init(adev);

        /* check MEM_SIZE for older asics */
        reg = amdgpu_asic_get_config_memsize(adev);

        if ((reg != 0) && (reg != 0xffffffff))
                return false;

        return true;
}

/* if we get transitioned to only one device, take VGA back */
/**
 * amdgpu_device_vga_set_decode - enable/disable vga decode
 *
 * @cookie: amdgpu_device pointer
 * @state: enable/disable vga decode
 *
 * Enable/disable vga decode (all asics).
 * Returns VGA resource flags.
 */
static unsigned int amdgpu_device_vga_set_decode(void *cookie, bool state)
{
        struct amdgpu_device *adev = cookie;
        amdgpu_asic_set_vga_state(adev, state);
        if (state)
                return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
                       VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
        else
                return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
}

/**
 * amdgpu_device_check_block_size - validate the vm block size
 *
 * @adev: amdgpu_device pointer
 *
 * Validates the vm block size specified via module parameter.
 * The vm block size defines number of bits in page table versus page directory,
 * a page is 4KB so we have 12 bits offset, minimum 9 bits in the
 * page table and the remaining bits are in the page directory.
 */
static void amdgpu_device_check_block_size(struct amdgpu_device *adev)
{
        /* defines number of bits in page table versus page directory,
         * a page is 4KB so we have 12 bits offset, minimum 9 bits in the
         * page table and the remaining bits are in the page directory */
        if (amdgpu_vm_block_size == -1)
                return;

        if (amdgpu_vm_block_size < 9) {
                dev_warn(adev->dev, "VM page table size (%d) too small\n",
                         amdgpu_vm_block_size);
                amdgpu_vm_block_size = -1;
        }
}

/**
 * amdgpu_device_check_vm_size - validate the vm size
 *
 * @adev: amdgpu_device pointer
 *
 * Validates the vm size in GB specified via module parameter.
 * The VM size is the size of the GPU virtual memory space in GB.
 */
static void amdgpu_device_check_vm_size(struct amdgpu_device *adev)
{
        /* no need to check the default value */
        if (amdgpu_vm_size == -1)
                return;

        if (amdgpu_vm_size < 1) {
                dev_warn(adev->dev, "VM size (%d) too small, min is 1GB\n",
                         amdgpu_vm_size);
                amdgpu_vm_size = -1;
        }
}

static void amdgpu_device_check_smu_prv_buffer_size(struct amdgpu_device *adev)
{
        struct sysinfo si;
        bool is_os_64 = (sizeof(void *) == 8);
        uint64_t total_memory;
        uint64_t dram_size_seven_GB = 0x1B8000000;
        uint64_t dram_size_three_GB = 0xB8000000;

        if (amdgpu_smu_memory_pool_size == 0)
                return;

        if (!is_os_64) {
                DRM_WARN("Not 64-bit OS, feature not supported\n");
                goto def_value;
        }
        si_meminfo(&si);
        total_memory = (uint64_t)si.totalram * si.mem_unit;

        if ((amdgpu_smu_memory_pool_size == 1) ||
                (amdgpu_smu_memory_pool_size == 2)) {
                if (total_memory < dram_size_three_GB)
                        goto def_value1;
        } else if ((amdgpu_smu_memory_pool_size == 4) ||
                (amdgpu_smu_memory_pool_size == 8)) {
                if (total_memory < dram_size_seven_GB)
                        goto def_value1;
        } else {
                DRM_WARN("Smu memory pool size not supported\n");
                goto def_value;
        }
        adev->pm.smu_prv_buffer_size = amdgpu_smu_memory_pool_size << 28;

        return;

def_value1:
        DRM_WARN("No enough system memory\n");
def_value:
        adev->pm.smu_prv_buffer_size = 0;
}

/**
 * amdgpu_device_check_arguments - validate module params
 *
 * @adev: amdgpu_device pointer
 *
 * Validates certain module parameters and updates
 * the associated values used by the driver (all asics).
 */
static int amdgpu_device_check_arguments(struct amdgpu_device *adev)
{
        if (amdgpu_sched_jobs < 4) {
                dev_warn(adev->dev, "sched jobs (%d) must be at least 4\n",
                         amdgpu_sched_jobs);
                amdgpu_sched_jobs = 4;
        } else if (!is_power_of_2(amdgpu_sched_jobs)){
                dev_warn(adev->dev, "sched jobs (%d) must be a power of 2\n",
                         amdgpu_sched_jobs);
                amdgpu_sched_jobs = roundup_pow_of_two(amdgpu_sched_jobs);
        }

        if (amdgpu_gart_size != -1 && amdgpu_gart_size < 32) {
                /* gart size must be greater or equal to 32M */
                dev_warn(adev->dev, "gart size (%d) too small\n",
                         amdgpu_gart_size);
                amdgpu_gart_size = -1;
        }

        if (amdgpu_gtt_size != -1 && amdgpu_gtt_size < 32) {
                /* gtt size must be greater or equal to 32M */
                dev_warn(adev->dev, "gtt size (%d) too small\n",
                                 amdgpu_gtt_size);
                amdgpu_gtt_size = -1;
        }

        /* valid range is between 4 and 9 inclusive */
        if (amdgpu_vm_fragment_size != -1 &&
            (amdgpu_vm_fragment_size > 9 || amdgpu_vm_fragment_size < 4)) {
                dev_warn(adev->dev, "valid range is between 4 and 9\n");
                amdgpu_vm_fragment_size = -1;
        }

        if (amdgpu_sched_hw_submission < 2) {
                dev_warn(adev->dev, "sched hw submission jobs (%d) must be at least 2\n",
                         amdgpu_sched_hw_submission);
                amdgpu_sched_hw_submission = 2;
        } else if (!is_power_of_2(amdgpu_sched_hw_submission)) {
                dev_warn(adev->dev, "sched hw submission jobs (%d) must be a power of 2\n",
                         amdgpu_sched_hw_submission);
                amdgpu_sched_hw_submission = roundup_pow_of_two(amdgpu_sched_hw_submission);
        }

        amdgpu_device_check_smu_prv_buffer_size(adev);

        amdgpu_device_check_vm_size(adev);

        amdgpu_device_check_block_size(adev);

        adev->firmware.load_type = amdgpu_ucode_get_load_type(adev, amdgpu_fw_load_type);

        amdgpu_gmc_tmz_set(adev);

        amdgpu_gmc_noretry_set(adev);

        return 0;
}

/**
 * amdgpu_switcheroo_set_state - set switcheroo state
 *
 * @pdev: pci dev pointer
 * @state: vga_switcheroo state
 *
 * Callback for the switcheroo driver.  Suspends or resumes the
 * the asics before or after it is powered up using ACPI methods.
 */
static void amdgpu_switcheroo_set_state(struct pci_dev *pdev,
                                        enum vga_switcheroo_state state)
{
        struct drm_device *dev = pci_get_drvdata(pdev);
        int r;

        if (amdgpu_device_supports_boco(dev) && state == VGA_SWITCHEROO_OFF)
                return;

        if (state == VGA_SWITCHEROO_ON) {
                pr_info("switched on\n");
                /* don't suspend or resume card normally */
                dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;

                pci_set_power_state(dev->pdev, PCI_D0);
                amdgpu_device_load_pci_state(dev->pdev);
                r = pci_enable_device(dev->pdev);
                if (r)
                        DRM_WARN("pci_enable_device failed (%d)\n", r);
                amdgpu_device_resume(dev, true);

                dev->switch_power_state = DRM_SWITCH_POWER_ON;
                drm_kms_helper_poll_enable(dev);
        } else {
                pr_info("switched off\n");
                drm_kms_helper_poll_disable(dev);
                dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
                amdgpu_device_suspend(dev, true);
                amdgpu_device_cache_pci_state(dev->pdev);
                /* Shut down the device */
                pci_disable_device(dev->pdev);
                pci_set_power_state(dev->pdev, PCI_D3cold);
                dev->switch_power_state = DRM_SWITCH_POWER_OFF;
        }
}

/**
 * amdgpu_switcheroo_can_switch - see if switcheroo state can change
 *
 * @pdev: pci dev pointer
 *
 * Callback for the switcheroo driver.  Check of the switcheroo
 * state can be changed.
 * Returns true if the state can be changed, false if not.
 */
static bool amdgpu_switcheroo_can_switch(struct pci_dev *pdev)
{
        struct drm_device *dev = pci_get_drvdata(pdev);

        /*
        * FIXME: open_count is protected by drm_global_mutex but that would lead to
        * locking inversion with the driver load path. And the access here is
        * completely racy anyway. So don't bother with locking for now.
        */
        return atomic_read(&dev->open_count) == 0;
}

static const struct vga_switcheroo_client_ops amdgpu_switcheroo_ops = {
        .set_gpu_state = amdgpu_switcheroo_set_state,
        .reprobe = NULL,
        .can_switch = amdgpu_switcheroo_can_switch,
};

/**
 * amdgpu_device_ip_set_clockgating_state - set the CG state
 *
 * @dev: amdgpu_device pointer
 * @block_type: Type of hardware IP (SMU, GFX, UVD, etc.)
 * @state: clockgating state (gate or ungate)
 *
 * Sets the requested clockgating state for all instances of
 * the hardware IP specified.
 * Returns the error code from the last instance.
 */
int amdgpu_device_ip_set_clockgating_state(void *dev,
                                           enum amd_ip_block_type block_type,
                                           enum amd_clockgating_state state)
{
        struct amdgpu_device *adev = dev;
        int i, r = 0;

        for (i = 0; i < adev->num_ip_blocks; i++) {
                if (!adev->ip_blocks[i].status.valid)
                        continue;
                if (adev->ip_blocks[i].version->type != block_type)
                        continue;
                if (!adev->ip_blocks[i].version->funcs->set_clockgating_state)
                        continue;
                r = adev->ip_blocks[i].version->funcs->set_clockgating_state(
                        (void *)adev, state);
                if (r)
                        DRM_ERROR("set_clockgating_state of IP block <%s> failed %d\n",
                                  adev->ip_blocks[i].version->funcs->name, r);
        }
        return r;
}

/**
 * amdgpu_device_ip_set_powergating_state - set the PG state
 *
 * @dev: amdgpu_device pointer
 * @block_type: Type of hardware IP (SMU, GFX, UVD, etc.)
 * @state: powergating state (gate or ungate)
 *
 * Sets the requested powergating state for all instances of
 * the hardware IP specified.
 * Returns the error code from the last instance.
 */
int amdgpu_device_ip_set_powergating_state(void *dev,
                                           enum amd_ip_block_type block_type,
                                           enum amd_powergating_state state)
{
        struct amdgpu_device *adev = dev;
        int i, r = 0;

        for (i = 0; i < adev->num_ip_blocks; i++) {
                if (!adev->ip_blocks[i].status.valid)
                        continue;
                if (adev->ip_blocks[i].version->type != block_type)
                        continue;
                if (!adev->ip_blocks[i].version->funcs->set_powergating_state)
                        continue;
                r = adev->ip_blocks[i].version->funcs->set_powergating_state(
                        (void *)adev, state);
                if (r)
                        DRM_ERROR("set_powergating_state of IP block <%s> failed %d\n",
                                  adev->ip_blocks[i].version->funcs->name, r);
        }
        return r;
}

/**
 * amdgpu_device_ip_get_clockgating_state - get the CG state
 *
 * @adev: amdgpu_device pointer
 * @flags: clockgating feature flags
 *
 * Walks the list of IPs on the device and updates the clockgating
 * flags for each IP.
 * Updates @flags with the feature flags for each hardware IP where
 * clockgating is enabled.
 */
void amdgpu_device_ip_get_clockgating_state(struct amdgpu_device *adev,
                                            u32 *flags)
{
        int i;

        for (i = 0; i < adev->num_ip_blocks; i++) {
                if (!adev->ip_blocks[i].status.valid)
                        continue;
                if (adev->ip_blocks[i].version->funcs->get_clockgating_state)
                        adev->ip_blocks[i].version->funcs->get_clockgating_state((void *)adev, flags);
        }
}

/**
 * amdgpu_device_ip_wait_for_idle - wait for idle
 *
 * @adev: amdgpu_device pointer
 * @block_type: Type of hardware IP (SMU, GFX, UVD, etc.)
 *
 * Waits for the request hardware IP to be idle.
 * Returns 0 for success or a negative error code on failure.
 */
int amdgpu_device_ip_wait_for_idle(struct amdgpu_device *adev,
                                   enum amd_ip_block_type block_type)
{
        int i, r;

        for (i = 0; i < adev->num_ip_blocks; i++) {
                if (!adev->ip_blocks[i].status.valid)
                        continue;
                if (adev->ip_blocks[i].version->type == block_type) {
                        r = adev->ip_blocks[i].version->funcs->wait_for_idle((void *)adev);
                        if (r)
                                return r;
                        break;
                }
        }
        return 0;

}

/**
 * amdgpu_device_ip_is_idle - is the hardware IP idle
 *
 * @adev: amdgpu_device pointer
 * @block_type: Type of hardware IP (SMU, GFX, UVD, etc.)
 *
 * Check if the hardware IP is idle or not.
 * Returns true if it the IP is idle, false if not.
 */
bool amdgpu_device_ip_is_idle(struct amdgpu_device *adev,
                              enum amd_ip_block_type block_type)
{
        int i;

        for (i = 0; i < adev->num_ip_blocks; i++) {
                if (!adev->ip_blocks[i].status.valid)
                        continue;
                if (adev->ip_blocks[i].version->type == block_type)
                        return adev->ip_blocks[i].version->funcs->is_idle((void *)adev);
        }
        return true;

}

/**
 * amdgpu_device_ip_get_ip_block - get a hw IP pointer
 *
 * @adev: amdgpu_device pointer
 * @type: Type of hardware IP (SMU, GFX, UVD, etc.)
 *
 * Returns a pointer to the hardware IP block structure
 * if it exists for the asic, otherwise NULL.
 */
struct amdgpu_ip_block *
amdgpu_device_ip_get_ip_block(struct amdgpu_device *adev,
                              enum amd_ip_block_type type)
{
        int i;

        for (i = 0; i < adev->num_ip_blocks; i++)
                if (adev->ip_blocks[i].version->type == type)
                        return &adev->ip_blocks[i];

        return NULL;
}

/**
 * amdgpu_device_ip_block_version_cmp
 *
 * @adev: amdgpu_device pointer
 * @type: enum amd_ip_block_type
 * @major: major version
 * @minor: minor version
 *
 * return 0 if equal or greater
 * return 1 if smaller or the ip_block doesn't exist
 */
int amdgpu_device_ip_block_version_cmp(struct amdgpu_device *adev,
                                       enum amd_ip_block_type type,
                                       u32 major, u32 minor)
{
        struct amdgpu_ip_block *ip_block = amdgpu_device_ip_get_ip_block(adev, type);

        if (ip_block && ((ip_block->version->major > major) ||
                        ((ip_block->version->major == major) &&
                        (ip_block->version->minor >= minor))))
                return 0;

        return 1;
}

/**
 * amdgpu_device_ip_block_add
 *
 * @adev: amdgpu_device pointer
 * @ip_block_version: pointer to the IP to add
 *
 * Adds the IP block driver information to the collection of IPs
 * on the asic.
 */
int amdgpu_device_ip_block_add(struct amdgpu_device *adev,
                               const struct amdgpu_ip_block_version *ip_block_version)
{
        if (!ip_block_version)
                return -EINVAL;

        DRM_INFO("add ip block number %d <%s>\n", adev->num_ip_blocks,
                  ip_block_version->funcs->name);

        adev->ip_blocks[adev->num_ip_blocks++].version = ip_block_version;

        return 0;
}

/**
 * amdgpu_device_enable_virtual_display - enable virtual display feature
 *
 * @adev: amdgpu_device pointer
 *
 * Enabled the virtual display feature if the user has enabled it via
 * the module parameter virtual_display.  This feature provides a virtual
 * display hardware on headless boards or in virtualized environments.
 * This function parses and validates the configuration string specified by
 * the user and configues the virtual display configuration (number of
 * virtual connectors, crtcs, etc.) specified.
 */
static void amdgpu_device_enable_virtual_display(struct amdgpu_device *adev)
{
        adev->enable_virtual_display = false;

        if (amdgpu_virtual_display) {
                struct drm_device *ddev = adev_to_drm(adev);
                const char *pci_address_name = pci_name(ddev->pdev);
                char *pciaddstr, *pciaddstr_tmp, *pciaddname_tmp, *pciaddname;

                pciaddstr = kstrdup(amdgpu_virtual_display, GFP_KERNEL);
                pciaddstr_tmp = pciaddstr;
                while ((pciaddname_tmp = strsep(&pciaddstr_tmp, ";"))) {
                        pciaddname = strsep(&pciaddname_tmp, ",");
                        if (!strcmp("all", pciaddname)
                            || !strcmp(pci_address_name, pciaddname)) {
                                long num_crtc;
                                int res = -1;

                                adev->enable_virtual_display = true;

                                if (pciaddname_tmp)
                                        res = kstrtol(pciaddname_tmp, 10,
                                                      &num_crtc);

                                if (!res) {
                                        if (num_crtc < 1)
                                                num_crtc = 1;
                                        if (num_crtc > 6)
                                                num_crtc = 6;
                                        adev->mode_info.num_crtc = num_crtc;
                                } else {
                                        adev->mode_info.num_crtc = 1;
                                }
                                break;
                        }
                }

                DRM_INFO("virtual display string:%s, %s:virtual_display:%d, num_crtc:%d\n",
                         amdgpu_virtual_display, pci_address_name,
                         adev->enable_virtual_display, adev->mode_info.num_crtc);

                kfree(pciaddstr);
        }
}

/**
 * amdgpu_device_parse_gpu_info_fw - parse gpu info firmware
 *
 * @adev: amdgpu_device pointer
 *
 * Parses the asic configuration parameters specified in the gpu info
 * firmware and makes them availale to the driver for use in configuring
 * the asic.
 * Returns 0 on success, -EINVAL on failure.
 */
static int amdgpu_device_parse_gpu_info_fw(struct amdgpu_device *adev)
{
        const char *chip_name;
        char fw_name[40];
        int err;
        const struct gpu_info_firmware_header_v1_0 *hdr;

        adev->firmware.gpu_info_fw = NULL;

        if (adev->mman.discovery_bin) {
                amdgpu_discovery_get_gfx_info(adev);

                /*
                 * FIXME: The bounding box is still needed by Navi12, so
                 * temporarily read it from gpu_info firmware. Should be droped
                 * when DAL no longer needs it.
                 */
                if (adev->asic_type != CHIP_NAVI12)
                        return 0;
        }

        switch (adev->asic_type) {
#ifdef CONFIG_DRM_AMDGPU_SI
        case CHIP_VERDE:
        case CHIP_TAHITI:
        case CHIP_PITCAIRN:
        case CHIP_OLAND:
        case CHIP_HAINAN:
#endif
#ifdef CONFIG_DRM_AMDGPU_CIK
        case CHIP_BONAIRE:
        case CHIP_HAWAII:
        case CHIP_KAVERI:
        case CHIP_KABINI:
        case CHIP_MULLINS:
#endif
        case CHIP_TOPAZ:
        case CHIP_TONGA:
        case CHIP_FIJI:
        case CHIP_POLARIS10:
        case CHIP_POLARIS11:
        case CHIP_POLARIS12:
        case CHIP_VEGAM:
        case CHIP_CARRIZO:
        case CHIP_STONEY:
        case CHIP_VEGA20:
        case CHIP_SIENNA_CICHLID:
        case CHIP_NAVY_FLOUNDER:
        case CHIP_DIMGREY_CAVEFISH:
        default:
                return 0;
        case CHIP_VEGA10:
                chip_name = "vega10";
                break;
        case CHIP_VEGA12:
                chip_name = "vega12";
                break;
        case CHIP_RAVEN:
                if (adev->apu_flags & AMD_APU_IS_RAVEN2)
                        chip_name = "raven2";
                else if (adev->apu_flags & AMD_APU_IS_PICASSO)
                        chip_name = "picasso";
                else
                        chip_name = "raven";
                break;
        case CHIP_ARCTURUS:
                chip_name = "arcturus";
                break;
        case CHIP_RENOIR:
                if (adev->apu_flags & AMD_APU_IS_RENOIR)
                        chip_name = "renoir";
                else
                        chip_name = "green_sardine";
                break;
        case CHIP_NAVI10:
                chip_name = "navi10";
                break;
        case CHIP_NAVI14:
                chip_name = "navi14";
                break;
        case CHIP_NAVI12:
                chip_name = "navi12";
                break;
        case CHIP_VANGOGH:
                chip_name = "vangogh";
                break;
        }

        snprintf(fw_name, sizeof(fw_name), "amdgpu/%s_gpu_info.bin", chip_name);
        err = request_firmware(&adev->firmware.gpu_info_fw, fw_name, adev->dev);
        if (err) {
                dev_err(adev->dev,
                        "Failed to load gpu_info firmware \"%s\"\n",
                        fw_name);
                goto out;
        }
        err = amdgpu_ucode_validate(adev->firmware.gpu_info_fw);
        if (err) {
                dev_err(adev->dev,
                        "Failed to validate gpu_info firmware \"%s\"\n",
                        fw_name);
                goto out;
        }

        hdr = (const struct gpu_info_firmware_header_v1_0 *)adev->firmware.gpu_info_fw->data;
        amdgpu_ucode_print_gpu_info_hdr(&hdr->header);

        switch (hdr->version_major) {
        case 1:
        {
                const struct gpu_info_firmware_v1_0 *gpu_info_fw =
                        (const struct gpu_info_firmware_v1_0 *)(adev->firmware.gpu_info_fw->data +
                                                                le32_to_cpu(hdr->header.ucode_array_offset_bytes));

                /*
                 * Should be droped when DAL no longer needs it.
                 */
                if (adev->asic_type == CHIP_NAVI12)
                        goto parse_soc_bounding_box;

                adev->gfx.config.max_shader_engines = le32_to_cpu(gpu_info_fw->gc_num_se);
                adev->gfx.config.max_cu_per_sh = le32_to_cpu(gpu_info_fw->gc_num_cu_per_sh);
                adev->gfx.config.max_sh_per_se = le32_to_cpu(gpu_info_fw->gc_num_sh_per_se);
                adev->gfx.config.max_backends_per_se = le32_to_cpu(gpu_info_fw->gc_num_rb_per_se);
                adev->gfx.config.max_texture_channel_caches =
                        le32_to_cpu(gpu_info_fw->gc_num_tccs);
                adev->gfx.config.max_gprs = le32_to_cpu(gpu_info_fw->gc_num_gprs);
                adev->gfx.config.max_gs_threads = le32_to_cpu(gpu_info_fw->gc_num_max_gs_thds);
                adev->gfx.config.gs_vgt_table_depth = le32_to_cpu(gpu_info_fw->gc_gs_table_depth);
                adev->gfx.config.gs_prim_buffer_depth = le32_to_cpu(gpu_info_fw->gc_gsprim_buff_depth);
                adev->gfx.config.double_offchip_lds_buf =
                        le32_to_cpu(gpu_info_fw->gc_double_offchip_lds_buffer);
                adev->gfx.cu_info.wave_front_size = le32_to_cpu(gpu_info_fw->gc_wave_size);
                adev->gfx.cu_info.max_waves_per_simd =
                        le32_to_cpu(gpu_info_fw->gc_max_waves_per_simd);
                adev->gfx.cu_info.max_scratch_slots_per_cu =
                        le32_to_cpu(gpu_info_fw->gc_max_scratch_slots_per_cu);
                adev->gfx.cu_info.lds_size = le32_to_cpu(gpu_info_fw->gc_lds_size);
                if (hdr->version_minor >= 1) {
                        const struct gpu_info_firmware_v1_1 *gpu_info_fw =
                                (const struct gpu_info_firmware_v1_1 *)(adev->firmware.gpu_info_fw->data +
                                                                        le32_to_cpu(hdr->header.ucode_array_offset_bytes));
                        adev->gfx.config.num_sc_per_sh =
                                le32_to_cpu(gpu_info_fw->num_sc_per_sh);
                        adev->gfx.config.num_packer_per_sc =
                                le32_to_cpu(gpu_info_fw->num_packer_per_sc);
                }

parse_soc_bounding_box:
                /*
                 * soc bounding box info is not integrated in disocovery table,
                 * we always need to parse it from gpu info firmware if needed.
                 */
                if (hdr->version_minor == 2) {
                        const struct gpu_info_firmware_v1_2 *gpu_info_fw =
                                (const struct gpu_info_firmware_v1_2 *)(adev->firmware.gpu_info_fw->data +
                                                                        le32_to_cpu(hdr->header.ucode_array_offset_bytes));
                        adev->dm.soc_bounding_box = &gpu_info_fw->soc_bounding_box;
                }
                break;
        }
        default:
                dev_err(adev->dev,
                        "Unsupported gpu_info table %d\n", hdr->header.ucode_version);
                err = -EINVAL;
                goto out;
        }
out:
        return err;
}

/**
 * amdgpu_device_ip_early_init - run early init for hardware IPs
 *
 * @adev: amdgpu_device pointer
 *
 * Early initialization pass for hardware IPs.  The hardware IPs that make
 * up each asic are discovered each IP's early_init callback is run.  This
 * is the first stage in initializing the asic.
 * Returns 0 on success, negative error code on failure.
 */
static int amdgpu_device_ip_early_init(struct amdgpu_device *adev)
{
        int i, r;

        amdgpu_device_enable_virtual_display(adev);

        if (amdgpu_sriov_vf(adev)) {
                r = amdgpu_virt_request_full_gpu(adev, true);
                if (r)
                        return r;
        }

        switch (adev->asic_type) {
#ifdef CONFIG_DRM_AMDGPU_SI
        case CHIP_VERDE:
        case CHIP_TAHITI:
        case CHIP_PITCAIRN:
        case CHIP_OLAND:
        case CHIP_HAINAN:
                adev->family = AMDGPU_FAMILY_SI;
                r = si_set_ip_blocks(adev);
                if (r)
                        return r;
                break;
#endif
#ifdef CONFIG_DRM_AMDGPU_CIK
        case CHIP_BONAIRE:
        case CHIP_HAWAII:
        case CHIP_KAVERI:
        case CHIP_KABINI:
        case CHIP_MULLINS:
                if (adev->flags & AMD_IS_APU)
                        adev->family = AMDGPU_FAMILY_KV;
                else
                        adev->family = AMDGPU_FAMILY_CI;

                r = cik_set_ip_blocks(adev);
                if (r)
                        return r;
                break;
#endif
        case CHIP_TOPAZ:
        case CHIP_TONGA:
        case CHIP_FIJI:
        case CHIP_POLARIS10:
        case CHIP_POLARIS11:
        case CHIP_POLARIS12:
        case CHIP_VEGAM:
        case CHIP_CARRIZO:
        case CHIP_STONEY:
                if (adev->flags & AMD_IS_APU)
                        adev->family = AMDGPU_FAMILY_CZ;
                else
                        adev->family = AMDGPU_FAMILY_VI;

                r = vi_set_ip_blocks(adev);
                if (r)
                        return r;
                break;
        case CHIP_VEGA10:
        case CHIP_VEGA12:
        case CHIP_VEGA20:
        case CHIP_RAVEN:
        case CHIP_ARCTURUS:
        case CHIP_RENOIR:
                if (adev->flags & AMD_IS_APU)
                        adev->family = AMDGPU_FAMILY_RV;
                else
                        adev->family = AMDGPU_FAMILY_AI;

                r = soc15_set_ip_blocks(adev);
                if (r)
                        return r;
                break;
        case  CHIP_NAVI10:
        case  CHIP_NAVI14:
        case  CHIP_NAVI12:
        case  CHIP_SIENNA_CICHLID:
        case  CHIP_NAVY_FLOUNDER:
        case  CHIP_DIMGREY_CAVEFISH:
        case CHIP_VANGOGH:
                if (adev->asic_type == CHIP_VANGOGH)
                        adev->family = AMDGPU_FAMILY_VGH;
                else
                        adev->family = AMDGPU_FAMILY_NV;

                r = nv_set_ip_blocks(adev);
                if (r)
                        return r;
                break;
        default:
                /* FIXME: not supported yet */
                return -EINVAL;
        }

        amdgpu_amdkfd_device_probe(adev);

        adev->pm.pp_feature = amdgpu_pp_feature_mask;
        if (amdgpu_sriov_vf(adev) || sched_policy == KFD_SCHED_POLICY_NO_HWS)
                adev->pm.pp_feature &= ~PP_GFXOFF_MASK;

        for (i = 0; i < adev->num_ip_blocks; i++) {
                if ((amdgpu_ip_block_mask & (1 << i)) == 0) {
                        DRM_ERROR("disabled ip block: %d <%s>\n",
                                  i, adev->ip_blocks[i].version->funcs->name);
                        adev->ip_blocks[i].status.valid = false;
                } else {
                        if (adev->ip_blocks[i].version->funcs->early_init) {
                                r = adev->ip_blocks[i].version->funcs->early_init((void *)adev);
                                if (r == -ENOENT) {
                                        adev->ip_blocks[i].status.valid = false;
                                } else if (r) {
                                        DRM_ERROR("early_init of IP block <%s> failed %d\n",
                                                  adev->ip_blocks[i].version->funcs->name, r);
                                        return r;
                                } else {
                                        adev->ip_blocks[i].status.valid = true;
                                }
                        } else {
                                adev->ip_blocks[i].status.valid = true;
                        }
                }
                /* get the vbios after the asic_funcs are set up */
                if (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_COMMON) {
                        r = amdgpu_device_parse_gpu_info_fw(adev);
                        if (r)
                                return r;

                        /* Read BIOS */
                        if (!amdgpu_get_bios(adev))
                                return -EINVAL;

                        r = amdgpu_atombios_init(adev);
                        if (r) {
                                dev_err(adev->dev, "amdgpu_atombios_init failed\n");
                                amdgpu_vf_error_put(adev, AMDGIM_ERROR_VF_ATOMBIOS_INIT_FAIL, 0, 0);
                                return r;
                        }
                }
        }

        adev->cg_flags &= amdgpu_cg_mask;
        adev->pg_flags &= amdgpu_pg_mask;

        return 0;
}

static int amdgpu_device_ip_hw_init_phase1(struct amdgpu_device *adev)
{
        int i, r;

        for (i = 0; i < adev->num_ip_blocks; i++) {
                if (!adev->ip_blocks[i].status.sw)
                        continue;
                if (adev->ip_blocks[i].status.hw)
                        continue;
                if (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_COMMON ||
                    (amdgpu_sriov_vf(adev) && (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_PSP)) ||
                    adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_IH) {
                        r = adev->ip_blocks[i].version->funcs->hw_init(adev);
                        if (r) {
                                DRM_ERROR("hw_init of IP block <%s> failed %d\n",
                                          adev->ip_blocks[i].version->funcs->name, r);
                                return r;
                        }
                        adev->ip_blocks[i].status.hw = true;
                }
        }

        return 0;
}

static int amdgpu_device_ip_hw_init_phase2(struct amdgpu_device *adev)
{
        int i, r;

        for (i = 0; i < adev->num_ip_blocks; i++) {
                if (!adev->ip_blocks[i].status.sw)
                        continue;
                if (adev->ip_blocks[i].status.hw)
                        continue;
                r = adev->ip_blocks[i].version->funcs->hw_init(adev);
                if (r) {
                        DRM_ERROR("hw_init of IP block <%s> failed %d\n",
                                  adev->ip_blocks[i].version->funcs->name, r);
                        return r;
                }
                adev->ip_blocks[i].status.hw = true;
        }

        return 0;
}

static int amdgpu_device_fw_loading(struct amdgpu_device *adev)
{
        int r = 0;
        int i;
        uint32_t smu_version;

        if (adev->asic_type >= CHIP_VEGA10) {
                for (i = 0; i < adev->num_ip_blocks; i++) {
                        if (adev->ip_blocks[i].version->type != AMD_IP_BLOCK_TYPE_PSP)
                                continue;

                        /* no need to do the fw loading again if already done*/
                        if (adev->ip_blocks[i].status.hw == true)
                                break;

                        if (amdgpu_in_reset(adev) || adev->in_suspend) {
                                r = adev->ip_blocks[i].version->funcs->resume(adev);
                                if (r) {
                                        DRM_ERROR("resume of IP block <%s> failed %d\n",
                                                          adev->ip_blocks[i].version->funcs->name, r);
                                        return r;
                                }
                        } else {
                                r = adev->ip_blocks[i].version->funcs->hw_init(adev);
                                if (r) {
                                        DRM_ERROR("hw_init of IP block <%s> failed %d\n",
                                                          adev->ip_blocks[i].version->funcs->name, r);
                                        return r;
                                }
                        }

                        adev->ip_blocks[i].status.hw = true;
                        break;
                }
        }

        if (!amdgpu_sriov_vf(adev) || adev->asic_type == CHIP_TONGA)
                r = amdgpu_pm_load_smu_firmware(adev, &smu_version);

        return r;
}

/**
 * amdgpu_device_ip_init - run init for hardware IPs
 *
 * @adev: amdgpu_device pointer
 *
 * Main initialization pass for hardware IPs.  The list of all the hardware
 * IPs that make up the asic is walked and the sw_init and hw_init callbacks
 * are run.  sw_init initializes the software state associated with each IP
 * and hw_init initializes the hardware associated with each IP.
 * Returns 0 on success, negative error code on failure.
 */
static int amdgpu_device_ip_init(struct amdgpu_device *adev)
{
        int i, r;

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

        for (i = 0; i < adev->num_ip_blocks; i++) {
                if (!adev->ip_blocks[i].status.valid)
                        continue;
                r = adev->ip_blocks[i].version->funcs->sw_init((void *)adev);
                if (r) {
                        DRM_ERROR("sw_init of IP block <%s> failed %d\n",
                                  adev->ip_blocks[i].version->funcs->name, r);
                        goto init_failed;
                }
                adev->ip_blocks[i].status.sw = true;

                /* need to do gmc hw init early so we can allocate gpu mem */
                if (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_GMC) {
                        r = amdgpu_device_vram_scratch_init(adev);
                        if (r) {
                                DRM_ERROR("amdgpu_vram_scratch_init failed %d\n", r);
                                goto init_failed;
                        }
                        r = adev->ip_blocks[i].version->funcs->hw_init((void *)adev);
                        if (r) {
                                DRM_ERROR("hw_init %d failed %d\n", i, r);
                                goto init_failed;
                        }
                        r = amdgpu_device_wb_init(adev);
                        if (r) {
                                DRM_ERROR("amdgpu_device_wb_init failed %d\n", r);
                                goto init_failed;
                        }
                        adev->ip_blocks[i].status.hw = true;

                        /* right after GMC hw init, we create CSA */
                        if (amdgpu_mcbp || amdgpu_sriov_vf(adev)) {
                                r = amdgpu_allocate_static_csa(adev, &adev->virt.csa_obj,
                                                                AMDGPU_GEM_DOMAIN_VRAM,
                                                                AMDGPU_CSA_SIZE);
                                if (r) {
                                        DRM_ERROR("allocate CSA failed %d\n", r);
                                        goto init_failed;
                                }
                        }
                }
        }

        if (amdgpu_sriov_vf(adev))
                amdgpu_virt_init_data_exchange(adev);

        r = amdgpu_ib_pool_init(adev);
        if (r) {
                dev_err(adev->dev, "IB initialization failed (%d).\n", r);
                amdgpu_vf_error_put(adev, AMDGIM_ERROR_VF_IB_INIT_FAIL, 0, r);
                goto init_failed;
        }

        r = amdgpu_ucode_create_bo(adev); /* create ucode bo when sw_init complete*/
        if (r)
                goto init_failed;

        r = amdgpu_device_ip_hw_init_phase1(adev);
        if (r)
                goto init_failed;

        r = amdgpu_device_fw_loading(adev);
        if (r)
                goto init_failed;

        r = amdgpu_device_ip_hw_init_phase2(adev);
        if (r)
                goto init_failed;

        /*
         * retired pages will be loaded from eeprom and reserved here,
         * it should be called after amdgpu_device_ip_hw_init_phase2  since
         * for some ASICs the RAS EEPROM code relies on SMU fully functioning
         * for I2C communication which only true at this point.
         *
         * amdgpu_ras_recovery_init may fail, but the upper only cares the
         * failure from bad gpu situation and stop amdgpu init process
         * accordingly. For other failed cases, it will still release all
         * the resource and print error message, rather than returning one
         * negative value to upper level.
         *
         * Note: theoretically, this should be called before all vram allocations
         * to protect retired page from abusing
         */
        r = amdgpu_ras_recovery_init(adev);
        if (r)
                goto init_failed;

        if (adev->gmc.xgmi.num_physical_nodes > 1)
                amdgpu_xgmi_add_device(adev);
        amdgpu_amdkfd_device_init(adev);

        amdgpu_fru_get_product_info(adev);

init_failed:
        if (amdgpu_sriov_vf(adev))
                amdgpu_virt_release_full_gpu(adev, true);

        return r;
}

/**
 * amdgpu_device_fill_reset_magic - writes reset magic to gart pointer
 *
 * @adev: amdgpu_device pointer
 *
 * Writes a reset magic value to the gart pointer in VRAM.  The driver calls
 * this function before a GPU reset.  If the value is retained after a
 * GPU reset, VRAM has not been lost.  Some GPU resets may destry VRAM contents.
 */
static void amdgpu_device_fill_reset_magic(struct amdgpu_device *adev)
{
        memcpy(adev->reset_magic, adev->gart.ptr, AMDGPU_RESET_MAGIC_NUM);
}

/**
 * amdgpu_device_check_vram_lost - check if vram is valid
 *
 * @adev: amdgpu_device pointer
 *
 * Checks the reset magic value written to the gart pointer in VRAM.
 * The driver calls this after a GPU reset to see if the contents of
 * VRAM is lost or now.
 * returns true if vram is lost, false if not.
 */
static bool amdgpu_device_check_vram_lost(struct amdgpu_device *adev)
{
        if (memcmp(adev->gart.ptr, adev->reset_magic,
                        AMDGPU_RESET_MAGIC_NUM))
                return true;

        if (!amdgpu_in_reset(adev))
                return false;

        /*
         * For all ASICs with baco/mode1 reset, the VRAM is
         * always assumed to be lost.
         */
        switch (amdgpu_asic_reset_method(adev)) {
        case AMD_RESET_METHOD_BACO:
        case AMD_RESET_METHOD_MODE1:
                return true;
        default:
                return false;
        }
}

/**
 * amdgpu_device_set_cg_state - set clockgating for amdgpu device
 *
 * @adev: amdgpu_device pointer
 * @state: clockgating state (gate or ungate)
 *
 * The list of all the hardware IPs that make up the asic is walked and the
 * set_clockgating_state callbacks are run.
 * Late initialization pass enabling clockgating for hardware IPs.
 * Fini or suspend, pass disabling clockgating for hardware IPs.
 * Returns 0 on success, negative error code on failure.
 */

static int amdgpu_device_set_cg_state(struct amdgpu_device *adev,
                                                enum amd_clockgating_state state)
{
        int i, j, r;

        if (amdgpu_emu_mode == 1)
                return 0;

        for (j = 0; j < adev->num_ip_blocks; j++) {
                i = state == AMD_CG_STATE_GATE ? j : adev->num_ip_blocks - j - 1;
                if (!adev->ip_blocks[i].status.late_initialized)
                        continue;
                /* skip CG for VCE/UVD, it's handled specially */
                if (adev->ip_blocks[i].version->type != AMD_IP_BLOCK_TYPE_UVD &&
                    adev->ip_blocks[i].version->type != AMD_IP_BLOCK_TYPE_VCE &&
                    adev->ip_blocks[i].version->type != AMD_IP_BLOCK_TYPE_VCN &&
                    adev->ip_blocks[i].version->type != AMD_IP_BLOCK_TYPE_JPEG &&
                    adev->ip_blocks[i].version->funcs->set_clockgating_state) {
                        /* enable clockgating to save power */
                        r = adev->ip_blocks[i].version->funcs->set_clockgating_state((void *)adev,
                                                                                     state);
                        if (r) {
                                DRM_ERROR("set_clockgating_state(gate) of IP block <%s> failed %d\n",
                                          adev->ip_blocks[i].version->funcs->name, r);
                                return r;
                        }
                }
        }

        return 0;
}

static int amdgpu_device_set_pg_state(struct amdgpu_device *adev, enum amd_powergating_state state)
{
        int i, j, r;

        if (amdgpu_emu_mode == 1)
                return 0;

        for (j = 0; j < adev->num_ip_blocks; j++) {
                i = state == AMD_PG_STATE_GATE ? j : adev->num_ip_blocks - j - 1;
                if (!adev->ip_blocks[i].status.late_initialized)
                        continue;
                /* skip CG for VCE/UVD, it's handled specially */
                if (adev->ip_blocks[i].version->type != AMD_IP_BLOCK_TYPE_UVD &&
                    adev->ip_blocks[i].version->type != AMD_IP_BLOCK_TYPE_VCE &&
                    adev->ip_blocks[i].version->type != AMD_IP_BLOCK_TYPE_VCN &&
                    adev->ip_blocks[i].version->type != AMD_IP_BLOCK_TYPE_JPEG &&
                    adev->ip_blocks[i].version->funcs->set_powergating_state) {
                        /* enable powergating to save power */
                        r = adev->ip_blocks[i].version->funcs->set_powergating_state((void *)adev,
                                                                                        state);
                        if (r) {
                                DRM_ERROR("set_powergating_state(gate) of IP block <%s> failed %d\n",
                                          adev->ip_blocks[i].version->funcs->name, r);
                                return r;
                        }
                }
        }
        return 0;
}

static int amdgpu_device_enable_mgpu_fan_boost(void)
{
        struct amdgpu_gpu_instance *gpu_ins;
        struct amdgpu_device *adev;
        int i, ret = 0;

        mutex_lock(&mgpu_info.mutex);

        /*
         * MGPU fan boost feature should be enabled
         * only when there are two or more dGPUs in
         * the system
         */
        if (mgpu_info.num_dgpu < 2)
                goto out;

        for (i = 0; i < mgpu_info.num_dgpu; i++) {
                gpu_ins = &(mgpu_info.gpu_ins[i]);
                adev = gpu_ins->adev;
                if (!(adev->flags & AMD_IS_APU) &&
                    !gpu_ins->mgpu_fan_enabled) {
                        ret = amdgpu_dpm_enable_mgpu_fan_boost(adev);
                        if (ret)
                                break;

                        gpu_ins->mgpu_fan_enabled = 1;
                }
        }

out:
        mutex_unlock(&mgpu_info.mutex);

        return ret;
}

/**
 * amdgpu_device_ip_late_init - run late init for hardware IPs
 *
 * @adev: amdgpu_device pointer
 *
 * Late initialization pass for hardware IPs.  The list of all the hardware
 * IPs that make up the asic is walked and the late_init callbacks are run.
 * late_init covers any special initialization that an IP requires
 * after all of the have been initialized or something that needs to happen
 * late in the init process.
 * Returns 0 on success, negative error code on failure.
 */
static int amdgpu_device_ip_late_init(struct amdgpu_device *adev)
{
        struct amdgpu_gpu_instance *gpu_instance;
        int i = 0, r;

        for (i = 0; i < adev->num_ip_blocks; i++) {
                if (!adev->ip_blocks[i].status.hw)
                        continue;
                if (adev->ip_blocks[i].version->funcs->late_init) {
                        r = adev->ip_blocks[i].version->funcs->late_init((void *)adev);
                        if (r) {
                                DRM_ERROR("late_init of IP block <%s> failed %d\n",
                                          adev->ip_blocks[i].version->funcs->name, r);
                                return r;
                        }
                }
                adev->ip_blocks[i].status.late_initialized = true;
        }

        amdgpu_ras_set_error_query_ready(adev, true);

        amdgpu_device_set_cg_state(adev, AMD_CG_STATE_GATE);
        amdgpu_device_set_pg_state(adev, AMD_PG_STATE_GATE);

        amdgpu_device_fill_reset_magic(adev);

        r = amdgpu_device_enable_mgpu_fan_boost();
        if (r)
                DRM_ERROR("enable mgpu fan boost failed (%d).\n", r);


        if (adev->gmc.xgmi.num_physical_nodes > 1) {
                mutex_lock(&mgpu_info.mutex);

                /*
                 * Reset device p-state to low as this was booted with high.
                 *
                 * This should be performed only after all devices from the same
                 * hive get initialized.
                 *
                 * However, it's unknown how many device in the hive in advance.
                 * As this is counted one by one during devices initializations.
                 *
                 * So, we wait for all XGMI interlinked devices initialized.
                 * This may bring some delays as those devices may come from
                 * different hives. But that should be OK.
                 */
                if (mgpu_info.num_dgpu == adev->gmc.xgmi.num_physical_nodes) {
                        for (i = 0; i < mgpu_info.num_gpu; i++) {
                                gpu_instance = &(mgpu_info.gpu_ins[i]);
                                if (gpu_instance->adev->flags & AMD_IS_APU)
                                        continue;

                                r = amdgpu_xgmi_set_pstate(gpu_instance->adev,
                                                AMDGPU_XGMI_PSTATE_MIN);
                                if (r) {
                                        DRM_ERROR("pstate setting failed (%d).\n", r);
                                        break;
                                }
                        }
                }

                mutex_unlock(&mgpu_info.mutex);
        }

        return 0;
}

/**
 * amdgpu_device_ip_fini - run fini for hardware IPs
 *
 * @adev: amdgpu_device pointer
 *
 * Main teardown pass for hardware IPs.  The list of all the hardware
 * IPs that make up the asic is walked and the hw_fini and sw_fini callbacks
 * are run.  hw_fini tears down the hardware associated with each IP
 * and sw_fini tears down any software state associated with each IP.
 * Returns 0 on success, negative error code on failure.
 */
static int amdgpu_device_ip_fini(struct amdgpu_device *adev)
{
        int i, r;

        if (amdgpu_sriov_vf(adev) && adev->virt.ras_init_done)
                amdgpu_virt_release_ras_err_handler_data(adev);

        amdgpu_ras_pre_fini(adev);

        if (adev->gmc.xgmi.num_physical_nodes > 1)
                amdgpu_xgmi_remove_device(adev);

        amdgpu_amdkfd_device_fini(adev);

        amdgpu_device_set_pg_state(adev, AMD_PG_STATE_UNGATE);
        amdgpu_device_set_cg_state(adev, AMD_CG_STATE_UNGATE);

        /* need to disable SMC first */
        for (i = 0; i < adev->num_ip_blocks; i++) {
                if (!adev->ip_blocks[i].status.hw)
                        continue;
                if (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_SMC) {
                        r = adev->ip_blocks[i].version->funcs->hw_fini((void *)adev);
                        /* XXX handle errors */
                        if (r) {
                                DRM_DEBUG("hw_fini of IP block <%s> failed %d\n",
                                          adev->ip_blocks[i].version->funcs->name, r);
                        }
                        adev->ip_blocks[i].status.hw = false;
                        break;
                }
        }

        for (i = adev->num_ip_blocks - 1; i >= 0; i--) {
                if (!adev->ip_blocks[i].status.hw)
                        continue;

                r = adev->ip_blocks[i].version->funcs->hw_fini((void *)adev);
                /* XXX handle errors */
                if (r) {
                        DRM_DEBUG("hw_fini of IP block <%s> failed %d\n",
                                  adev->ip_blocks[i].version->funcs->name, r);
                }

                adev->ip_blocks[i].status.hw = false;
        }


        for (i = adev->num_ip_blocks - 1; i >= 0; i--) {
                if (!adev->ip_blocks[i].status.sw)
                        continue;

                if (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_GMC) {
                        amdgpu_ucode_free_bo(adev);
                        amdgpu_free_static_csa(&adev->virt.csa_obj);
                        amdgpu_device_wb_fini(adev);
                        amdgpu_device_vram_scratch_fini(adev);
                        amdgpu_ib_pool_fini(adev);
                }

                r = adev->ip_blocks[i].version->funcs->sw_fini((void *)adev);
                /* XXX handle errors */
                if (r) {
                        DRM_DEBUG("sw_fini of IP block <%s> failed %d\n",
                                  adev->ip_blocks[i].version->funcs->name, r);
                }
                adev->ip_blocks[i].status.sw = false;
                adev->ip_blocks[i].status.valid = false;
        }

        for (i = adev->num_ip_blocks - 1; i >= 0; i--) {
                if (!adev->ip_blocks[i].status.late_initialized)
                        continue;
                if (adev->ip_blocks[i].version->funcs->late_fini)
                        adev->ip_blocks[i].version->funcs->late_fini((void *)adev);
                adev->ip_blocks[i].status.late_initialized = false;
        }

        amdgpu_ras_fini(adev);

        if (amdgpu_sriov_vf(adev))
                if (amdgpu_virt_release_full_gpu(adev, false))
                        DRM_ERROR("failed to release exclusive mode on fini\n");

        return 0;
}

/**
 * amdgpu_device_delayed_init_work_handler - work handler for IB tests
 *
 * @work: work_struct.
 */
static void amdgpu_device_delayed_init_work_handler(struct work_struct *work)
{
        struct amdgpu_device *adev =
                container_of(work, struct amdgpu_device, delayed_init_work.work);
        int r;

        r = amdgpu_ib_ring_tests(adev);
        if (r)
                DRM_ERROR("ib ring test failed (%d).\n", r);
}

static void amdgpu_device_delay_enable_gfx_off(struct work_struct *work)
{
        struct amdgpu_device *adev =
                container_of(work, struct amdgpu_device, gfx.gfx_off_delay_work.work);

        mutex_lock(&adev->gfx.gfx_off_mutex);
        if (!adev->gfx.gfx_off_state && !adev->gfx.gfx_off_req_count) {
                if (!amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_GFX, true))
                        adev->gfx.gfx_off_state = true;
        }
        mutex_unlock(&adev->gfx.gfx_off_mutex);
}

/**
 * amdgpu_device_ip_suspend_phase1 - run suspend for hardware IPs (phase 1)
 *
 * @adev: amdgpu_device pointer
 *
 * Main suspend function for hardware IPs.  The list of all the hardware
 * IPs that make up the asic is walked, clockgating is disabled and the
 * suspend callbacks are run.  suspend puts the hardware and software state
 * in each IP into a state suitable for suspend.
 * Returns 0 on success, negative error code on failure.
 */
static int amdgpu_device_ip_suspend_phase1(struct amdgpu_device *adev)
{
        int i, r;

        amdgpu_device_set_pg_state(adev, AMD_PG_STATE_UNGATE);
        amdgpu_device_set_cg_state(adev, AMD_CG_STATE_UNGATE);

        for (i = adev->num_ip_blocks - 1; i >= 0; i--) {
                if (!adev->ip_blocks[i].status.valid)
                        continue;

                /* displays are handled separately */
                if (adev->ip_blocks[i].version->type != AMD_IP_BLOCK_TYPE_DCE)
                        continue;

                /* XXX handle errors */
                r = adev->ip_blocks[i].version->funcs->suspend(adev);
                /* XXX handle errors */
                if (r) {
                        DRM_ERROR("suspend of IP block <%s> failed %d\n",
                                  adev->ip_blocks[i].version->funcs->name, r);
                        return r;
                }

                adev->ip_blocks[i].status.hw = false;
        }

        return 0;
}

/**
 * amdgpu_device_ip_suspend_phase2 - run suspend for hardware IPs (phase 2)
 *
 * @adev: amdgpu_device pointer
 *
 * Main suspend function for hardware IPs.  The list of all the hardware
 * IPs that make up the asic is walked, clockgating is disabled and the
 * suspend callbacks are run.  suspend puts the hardware and software state
 * in each IP into a state suitable for suspend.
 * Returns 0 on success, negative error code on failure.
 */
static int amdgpu_device_ip_suspend_phase2(struct amdgpu_device *adev)
{
        int i, r;

        for (i = adev->num_ip_blocks - 1; i >= 0; i--) {
                if (!adev->ip_blocks[i].status.valid)
                        continue;
                /* displays are handled in phase1 */
                if (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_DCE)
                        continue;
                /* PSP lost connection when err_event_athub occurs */
                if (amdgpu_ras_intr_triggered() &&
                    adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_PSP) {
                        adev->ip_blocks[i].status.hw = false;
                        continue;
                }
                /* XXX handle errors */
                r = adev->ip_blocks[i].version->funcs->suspend(adev);
                /* XXX handle errors */
                if (r) {
                        DRM_ERROR("suspend of IP block <%s> failed %d\n",
                                  adev->ip_blocks[i].version->funcs->name, r);
                }
                adev->ip_blocks[i].status.hw = false;
                /* handle putting the SMC in the appropriate state */
                if(!amdgpu_sriov_vf(adev)){
                        if (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_SMC) {
                                r = amdgpu_dpm_set_mp1_state(adev, adev->mp1_state);
                                if (r) {
                                        DRM_ERROR("SMC failed to set mp1 state %d, %d\n",
                                                        adev->mp1_state, r);
                                        return r;
                                }
                        }
                }
                adev->ip_blocks[i].status.hw = false;
        }

        return 0;
}

/**
 * amdgpu_device_ip_suspend - run suspend for hardware IPs
 *
 * @adev: amdgpu_device pointer
 *
 * Main suspend function for hardware IPs.  The list of all the hardware
 * IPs that make up the asic is walked, clockgating is disabled and the
 * suspend callbacks are run.  suspend puts the hardware and software state
 * in each IP into a state suitable for suspend.
 * Returns 0 on success, negative error code on failure.
 */
int amdgpu_device_ip_suspend(struct amdgpu_device *adev)
{
        int r;

        if (amdgpu_sriov_vf(adev))
                amdgpu_virt_request_full_gpu(adev, false);

        r = amdgpu_device_ip_suspend_phase1(adev);
        if (r)
                return r;
        r = amdgpu_device_ip_suspend_phase2(adev);

        if (amdgpu_sriov_vf(adev))
                amdgpu_virt_release_full_gpu(adev, false);

        return r;
}

static int amdgpu_device_ip_reinit_early_sriov(struct amdgpu_device *adev)
{
        int i, r;

        static enum amd_ip_block_type ip_order[] = {
                AMD_IP_BLOCK_TYPE_GMC,
                AMD_IP_BLOCK_TYPE_COMMON,
                AMD_IP_BLOCK_TYPE_PSP,
                AMD_IP_BLOCK_TYPE_IH,
        };

        for (i = 0; i < ARRAY_SIZE(ip_order); i++) {
                int j;
                struct amdgpu_ip_block *block;

                block = &adev->ip_blocks[i];
                block->status.hw = false;

                for (j = 0; j < ARRAY_SIZE(ip_order); j++) {

                        if (block->version->type != ip_order[j] ||
                                !block->status.valid)
                                continue;

                        r = block->version->funcs->hw_init(adev);
                        DRM_INFO("RE-INIT-early: %s %s\n", block->version->funcs->name, r?"failed":"succeeded");
                        if (r)
                                return r;
                        block->status.hw = true;
                }
        }

        return 0;
}

static int amdgpu_device_ip_reinit_late_sriov(struct amdgpu_device *adev)
{
        int i, r;

        static enum amd_ip_block_type ip_order[] = {
                AMD_IP_BLOCK_TYPE_SMC,
                AMD_IP_BLOCK_TYPE_DCE,
                AMD_IP_BLOCK_TYPE_GFX,
                AMD_IP_BLOCK_TYPE_SDMA,
                AMD_IP_BLOCK_TYPE_UVD,
                AMD_IP_BLOCK_TYPE_VCE,
                AMD_IP_BLOCK_TYPE_VCN
        };

        for (i = 0; i < ARRAY_SIZE(ip_order); i++) {
                int j;
                struct amdgpu_ip_block *block;

                for (j = 0; j < adev->num_ip_blocks; j++) {
                        block = &adev->ip_blocks[j];

                        if (block->version->type != ip_order[i] ||
                                !block->status.valid ||
                                block->status.hw)
                                continue;

                        if (block->version->type == AMD_IP_BLOCK_TYPE_SMC)
                                r = block->version->funcs->resume(adev);
                        else
                                r = block->version->funcs->hw_init(adev);

                        DRM_INFO("RE-INIT-late: %s %s\n", block->version->funcs->name, r?"failed":"succeeded");
                        if (r)
                                return r;
                        block->status.hw = true;
                }
        }

        return 0;
}

/**
 * amdgpu_device_ip_resume_phase1 - run resume for hardware IPs
 *
 * @adev: amdgpu_device pointer
 *
 * First resume function for hardware IPs.  The list of all the hardware
 * IPs that make up the asic is walked and the resume callbacks are run for
 * COMMON, GMC, and IH.  resume puts the hardware into a functional state
 * after a suspend and updates the software state as necessary.  This
 * function is also used for restoring the GPU after a GPU reset.
 * Returns 0 on success, negative error code on failure.
 */
static int amdgpu_device_ip_resume_phase1(struct amdgpu_device *adev)
{
        int i, r;

        for (i = 0; i < adev->num_ip_blocks; i++) {
                if (!adev->ip_blocks[i].status.valid || adev->ip_blocks[i].status.hw)
                        continue;
                if (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_COMMON ||
                    adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_GMC ||
                    adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_IH) {

                        r = adev->ip_blocks[i].version->funcs->resume(adev);
                        if (r) {
                                DRM_ERROR("resume of IP block <%s> failed %d\n",
                                          adev->ip_blocks[i].version->funcs->name, r);
                                return r;
                        }
                        adev->ip_blocks[i].status.hw = true;
                }
        }

        return 0;
}

/**
 * amdgpu_device_ip_resume_phase2 - run resume for hardware IPs
 *
 * @adev: amdgpu_device pointer
 *
 * First resume function for hardware IPs.  The list of all the hardware
 * IPs that make up the asic is walked and the resume callbacks are run for
 * all blocks except COMMON, GMC, and IH.  resume puts the hardware into a
 * functional state after a suspend and updates the software state as
 * necessary.  This function is also used for restoring the GPU after a GPU
 * reset.
 * Returns 0 on success, negative error code on failure.
 */
static int amdgpu_device_ip_resume_phase2(struct amdgpu_device *adev)
{
        int i, r;

        for (i = 0; i < adev->num_ip_blocks; i++) {
                if (!adev->ip_blocks[i].status.valid || adev->ip_blocks[i].status.hw)
                        continue;
                if (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_COMMON ||
                    adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_GMC ||
                    adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_IH ||
                    adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_PSP)
                        continue;
                r = adev->ip_blocks[i].version->funcs->resume(adev);
                if (r) {
                        DRM_ERROR("resume of IP block <%s> failed %d\n",
                                  adev->ip_blocks[i].version->funcs->name, r);
                        return r;
                }
                adev->ip_blocks[i].status.hw = true;
        }

        return 0;
}

/**
 * amdgpu_device_ip_resume - run resume for hardware IPs
 *
 * @adev: amdgpu_device pointer
 *
 * Main resume function for hardware IPs.  The hardware IPs
 * are split into two resume functions because they are
 * are also used in in recovering from a GPU reset and some additional
 * steps need to be take between them.  In this case (S3/S4) they are
 * run sequentially.
 * Returns 0 on success, negative error code on failure.
 */
static int amdgpu_device_ip_resume(struct amdgpu_device *adev)
{
        int r;

        r = amdgpu_device_ip_resume_phase1(adev);
        if (r)
                return r;

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

        r = amdgpu_device_ip_resume_phase2(adev);

        return r;
}

/**
 * amdgpu_device_detect_sriov_bios - determine if the board supports SR-IOV
 *
 * @adev: amdgpu_device pointer
 *
 * Query the VBIOS data tables to determine if the board supports SR-IOV.
 */
static void amdgpu_device_detect_sriov_bios(struct amdgpu_device *adev)
{
        if (amdgpu_sriov_vf(adev)) {
                if (adev->is_atom_fw) {
                        if (amdgpu_atomfirmware_gpu_supports_virtualization(adev))
                                adev->virt.caps |= AMDGPU_SRIOV_CAPS_SRIOV_VBIOS;
                } else {
                        if (amdgpu_atombios_has_gpu_virtualization_table(adev))
                                adev->virt.caps |= AMDGPU_SRIOV_CAPS_SRIOV_VBIOS;
                }

                if (!(adev->virt.caps & AMDGPU_SRIOV_CAPS_SRIOV_VBIOS))
                        amdgpu_vf_error_put(adev, AMDGIM_ERROR_VF_NO_VBIOS, 0, 0);
        }
}

/**
 * amdgpu_device_asic_has_dc_support - determine if DC supports the asic
 *
 * @asic_type: AMD asic type
 *
 * Check if there is DC (new modesetting infrastructre) support for an asic.
 * returns true if DC has support, false if not.
 */
bool amdgpu_device_asic_has_dc_support(enum amd_asic_type asic_type)
{
        switch (asic_type) {
#if defined(CONFIG_DRM_AMD_DC)
#if defined(CONFIG_DRM_AMD_DC_SI)
        case CHIP_TAHITI:
        case CHIP_PITCAIRN:
        case CHIP_VERDE:
        case CHIP_OLAND:
#endif
        case CHIP_BONAIRE:
        case CHIP_KAVERI:
        case CHIP_KABINI:
        case CHIP_MULLINS:
                /*
                 * We have systems in the wild with these ASICs that require
                 * LVDS and VGA support which is not supported with DC.
                 *
                 * Fallback to the non-DC driver here by default so as not to
                 * cause regressions.
                 */
                return amdgpu_dc > 0;
        case CHIP_HAWAII:
        case CHIP_CARRIZO:
        case CHIP_STONEY:
        case CHIP_POLARIS10:
        case CHIP_POLARIS11:
        case CHIP_POLARIS12:
        case CHIP_VEGAM:
        case CHIP_TONGA:
        case CHIP_FIJI:
        case CHIP_VEGA10:
        case CHIP_VEGA12:
        case CHIP_VEGA20:
#if defined(CONFIG_DRM_AMD_DC_DCN)
        case CHIP_RAVEN:
        case CHIP_NAVI10:
        case CHIP_NAVI14:
        case CHIP_NAVI12:
        case CHIP_RENOIR:
        case CHIP_SIENNA_CICHLID:
        case CHIP_NAVY_FLOUNDER:
        case CHIP_DIMGREY_CAVEFISH:
        case CHIP_VANGOGH:
#endif
                return amdgpu_dc != 0;
#endif
        default:
                if (amdgpu_dc > 0)
                        DRM_INFO("Display Core has been requested via kernel parameter "
                                         "but isn't supported by ASIC, ignoring\n");
                return false;
        }
}

/**
 * amdgpu_device_has_dc_support - check if dc is supported
 *
 * @adev: amdgpu_device pointer
 *
 * Returns true for supported, false for not supported
 */
bool amdgpu_device_has_dc_support(struct amdgpu_device *adev)
{
        if (amdgpu_sriov_vf(adev) || adev->enable_virtual_display)
                return false;

        return amdgpu_device_asic_has_dc_support(adev->asic_type);
}


static void amdgpu_device_xgmi_reset_func(struct work_struct *__work)
{
        struct amdgpu_device *adev =
                container_of(__work, struct amdgpu_device, xgmi_reset_work);
        struct amdgpu_hive_info *hive = amdgpu_get_xgmi_hive(adev);

        /* It's a bug to not have a hive within this function */
        if (WARN_ON(!hive))
                return;

        /*
         * Use task barrier to synchronize all xgmi reset works across the
         * hive. task_barrier_enter and task_barrier_exit will block
         * until all the threads running the xgmi reset works reach
         * those points. task_barrier_full will do both blocks.
         */
        if (amdgpu_asic_reset_method(adev) == AMD_RESET_METHOD_BACO) {

                task_barrier_enter(&hive->tb);
                adev->asic_reset_res = amdgpu_device_baco_enter(adev_to_drm(adev));

                if (adev->asic_reset_res)
                        goto fail;

                task_barrier_exit(&hive->tb);
                adev->asic_reset_res = amdgpu_device_baco_exit(adev_to_drm(adev));

                if (adev->asic_reset_res)
                        goto fail;

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

                task_barrier_full(&hive->tb);
                adev->asic_reset_res =  amdgpu_asic_reset(adev);
        }

fail:
        if (adev->asic_reset_res)
                DRM_WARN("ASIC reset failed with error, %d for drm dev, %s",
                         adev->asic_reset_res, adev_to_drm(adev)->unique);
        amdgpu_put_xgmi_hive(hive);
}

static int amdgpu_device_get_job_timeout_settings(struct amdgpu_device *adev)
{
        char *input = amdgpu_lockup_timeout;
        char *timeout_setting = NULL;
        int index = 0;
        long timeout;
        int ret = 0;

        /*
         * By default timeout for non compute jobs is 10000.
         * And there is no timeout enforced on compute jobs.
         * In SR-IOV or passthrough mode, timeout for compute
         * jobs are 60000 by default.
         */
        adev->gfx_timeout = msecs_to_jiffies(10000);
        adev->sdma_timeout = adev->video_timeout = adev->gfx_timeout;
        if (amdgpu_sriov_vf(adev) || amdgpu_passthrough(adev))
                adev->compute_timeout =  msecs_to_jiffies(60000);
        else
                adev->compute_timeout = MAX_SCHEDULE_TIMEOUT;

        if (strnlen(input, AMDGPU_MAX_TIMEOUT_PARAM_LENGTH)) {
                while ((timeout_setting = strsep(&input, ",")) &&
                                strnlen(timeout_setting, AMDGPU_MAX_TIMEOUT_PARAM_LENGTH)) {
                        ret = kstrtol(timeout_setting, 0, &timeout);
                        if (ret)
                                return ret;

                        if (timeout == 0) {
                                index++;
                                continue;
                        } else if (timeout < 0) {
                                timeout = MAX_SCHEDULE_TIMEOUT;
                        } else {
                                timeout = msecs_to_jiffies(timeout);
                        }

                        switch (index++) {
                        case 0:
                                adev->gfx_timeout = timeout;
                                break;
                        case 1:
                                adev->compute_timeout = timeout;
                                break;
                        case 2:
                                adev->sdma_timeout = timeout;
                                break;
                        case 3:
                                adev->video_timeout = timeout;
                                break;
                        default:
                                break;
                        }
                }
                /*
                 * There is only one value specified and
                 * it should apply to all non-compute jobs.
                 */
                if (index == 1) {
                        adev->sdma_timeout = adev->video_timeout = adev->gfx_timeout;
                        if (amdgpu_sriov_vf(adev) || amdgpu_passthrough(adev))
                                adev->compute_timeout = adev->gfx_timeout;
                }
        }

        return ret;
}

static const struct attribute *amdgpu_dev_attributes[] = {
        &dev_attr_product_name.attr,
        &dev_attr_product_number.attr,
        &dev_attr_serial_number.attr,
        &dev_attr_pcie_replay_count.attr,
        NULL
};


/**
 * amdgpu_device_init - initialize the driver
 *
 * @adev: amdgpu_device pointer
 * @flags: driver flags
 *
 * Initializes the driver info and hw (all asics).
 * Returns 0 for success or an error on failure.
 * Called at driver startup.
 */
int amdgpu_device_init(struct amdgpu_device *adev,
                       uint32_t flags)
{
        struct drm_device *ddev = adev_to_drm(adev);
        struct pci_dev *pdev = adev->pdev;
        int r, i;
        bool boco = false;
        u32 max_MBps;

        adev->shutdown = false;
        adev->flags = flags;

        if (amdgpu_force_asic_type >= 0 && amdgpu_force_asic_type < CHIP_LAST)
                adev->asic_type = amdgpu_force_asic_type;
        else
                adev->asic_type = flags & AMD_ASIC_MASK;

        adev->usec_timeout = AMDGPU_MAX_USEC_TIMEOUT;
        if (amdgpu_emu_mode == 1)
                adev->usec_timeout *= 10;
        adev->gmc.gart_size = 512 * 1024 * 1024;
        adev->accel_working = false;
        adev->num_rings = 0;
        adev->mman.buffer_funcs = NULL;
        adev->mman.buffer_funcs_ring = NULL;
        adev->vm_manager.vm_pte_funcs = NULL;
        adev->vm_manager.vm_pte_num_scheds = 0;
        adev->gmc.gmc_funcs = NULL;
        adev->fence_context = dma_fence_context_alloc(AMDGPU_MAX_RINGS);
        bitmap_zero(adev->gfx.pipe_reserve_bitmap, AMDGPU_MAX_COMPUTE_QUEUES);

        adev->smc_rreg = &amdgpu_invalid_rreg;
        adev->smc_wreg = &amdgpu_invalid_wreg;
        adev->pcie_rreg = &amdgpu_invalid_rreg;
        adev->pcie_wreg = &amdgpu_invalid_wreg;
        adev->pciep_rreg = &amdgpu_invalid_rreg;
        adev->pciep_wreg = &amdgpu_invalid_wreg;
        adev->pcie_rreg64 = &amdgpu_invalid_rreg64;
        adev->pcie_wreg64 = &amdgpu_invalid_wreg64;
        adev->uvd_ctx_rreg = &amdgpu_invalid_rreg;
        adev->uvd_ctx_wreg = &amdgpu_invalid_wreg;
        adev->didt_rreg = &amdgpu_invalid_rreg;
        adev->didt_wreg = &amdgpu_invalid_wreg;
        adev->gc_cac_rreg = &amdgpu_invalid_rreg;
        adev->gc_cac_wreg = &amdgpu_invalid_wreg;
        adev->audio_endpt_rreg = &amdgpu_block_invalid_rreg;
        adev->audio_endpt_wreg = &amdgpu_block_invalid_wreg;

        DRM_INFO("initializing kernel modesetting (%s 0x%04X:0x%04X 0x%04X:0x%04X 0x%02X).\n",
                 amdgpu_asic_name[adev->asic_type], pdev->vendor, pdev->device,
                 pdev->subsystem_vendor, pdev->subsystem_device, pdev->revision);

        /* mutex initialization are all done here so we
         * can recall function without having locking issues */
        atomic_set(&adev->irq.ih.lock, 0);
        mutex_init(&adev->firmware.mutex);
        mutex_init(&adev->pm.mutex);
        mutex_init(&adev->gfx.gpu_clock_mutex);
        mutex_init(&adev->srbm_mutex);
        mutex_init(&adev->gfx.pipe_reserve_mutex);
        mutex_init(&adev->gfx.gfx_off_mutex);
        mutex_init(&adev->grbm_idx_mutex);
        mutex_init(&adev->mn_lock);
        mutex_init(&adev->virt.vf_errors.lock);
        hash_init(adev->mn_hash);
        atomic_set(&adev->in_gpu_reset, 0);
        init_rwsem(&adev->reset_sem);
        mutex_init(&adev->psp.mutex);
        mutex_init(&adev->notifier_lock);

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

        spin_lock_init(&adev->mmio_idx_lock);
        spin_lock_init(&adev->smc_idx_lock);
        spin_lock_init(&adev->pcie_idx_lock);
        spin_lock_init(&adev->uvd_ctx_idx_lock);
        spin_lock_init(&adev->didt_idx_lock);
        spin_lock_init(&adev->gc_cac_idx_lock);
        spin_lock_init(&adev->se_cac_idx_lock);
        spin_lock_init(&adev->audio_endpt_idx_lock);
        spin_lock_init(&adev->mm_stats.lock);

        INIT_LIST_HEAD(&adev->shadow_list);
        mutex_init(&adev->shadow_list_lock);

        INIT_DELAYED_WORK(&adev->delayed_init_work,
                          amdgpu_device_delayed_init_work_handler);
        INIT_DELAYED_WORK(&adev->gfx.gfx_off_delay_work,
                          amdgpu_device_delay_enable_gfx_off);

        INIT_WORK(&adev->xgmi_reset_work, amdgpu_device_xgmi_reset_func);

        adev->gfx.gfx_off_req_count = 1;
        adev->pm.ac_power = power_supply_is_system_supplied() > 0;

        atomic_set(&adev->throttling_logging_enabled, 1);
        /*
         * If throttling continues, logging will be performed every minute
         * to avoid log flooding. "-1" is subtracted since the thermal
         * throttling interrupt comes every second. Thus, the total logging
         * interval is 59 seconds(retelimited printk interval) + 1(waiting
         * for throttling interrupt) = 60 seconds.
         */
        ratelimit_state_init(&adev->throttling_logging_rs, (60 - 1) * HZ, 1);
        ratelimit_set_flags(&adev->throttling_logging_rs, RATELIMIT_MSG_ON_RELEASE);

        /* Registers mapping */
        /* TODO: block userspace mapping of io register */
        if (adev->asic_type >= CHIP_BONAIRE) {
                adev->rmmio_base = pci_resource_start(adev->pdev, 5);
                adev->rmmio_size = pci_resource_len(adev->pdev, 5);
        } else {
                adev->rmmio_base = pci_resource_start(adev->pdev, 2);
                adev->rmmio_size = pci_resource_len(adev->pdev, 2);
        }

        adev->rmmio = ioremap(adev->rmmio_base, adev->rmmio_size);
        if (adev->rmmio == NULL) {
                return -ENOMEM;
        }
        DRM_INFO("register mmio base: 0x%08X\n", (uint32_t)adev->rmmio_base);
        DRM_INFO("register mmio size: %u\n", (unsigned)adev->rmmio_size);

        /* io port mapping */
        for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
                if (pci_resource_flags(adev->pdev, i) & IORESOURCE_IO) {
                        adev->rio_mem_size = pci_resource_len(adev->pdev, i);
                        adev->rio_mem = pci_iomap(adev->pdev, i, adev->rio_mem_size);
                        break;
                }
        }
        if (adev->rio_mem == NULL)
                DRM_INFO("PCI I/O BAR is not found.\n");

        /* enable PCIE atomic ops */
        r = pci_enable_atomic_ops_to_root(adev->pdev,
                                          PCI_EXP_DEVCAP2_ATOMIC_COMP32 |
                                          PCI_EXP_DEVCAP2_ATOMIC_COMP64);
        if (r) {
                adev->have_atomics_support = false;
                DRM_INFO("PCIE atomic ops is not supported\n");
        } else {
                adev->have_atomics_support = true;
        }

        amdgpu_device_get_pcie_info(adev);

        if (amdgpu_mcbp)
                DRM_INFO("MCBP is enabled\n");

        if (amdgpu_mes && adev->asic_type >= CHIP_NAVI10)
                adev->enable_mes = true;

        /* detect hw virtualization here */
        amdgpu_detect_virtualization(adev);

        r = amdgpu_device_get_job_timeout_settings(adev);
        if (r) {
                dev_err(adev->dev, "invalid lockup_timeout parameter syntax\n");
                goto failed_unmap;
        }

        /* early init functions */
        r = amdgpu_device_ip_early_init(adev);
        if (r)
                goto failed_unmap;

        /* doorbell bar mapping and doorbell index init*/
        amdgpu_device_doorbell_init(adev);

        /* if we have > 1 VGA cards, then disable the amdgpu VGA resources */
        /* this will fail for cards that aren't VGA class devices, just
         * ignore it */
        vga_client_register(adev->pdev, adev, NULL, amdgpu_device_vga_set_decode);

        if (amdgpu_device_supports_boco(ddev))
                boco = true;
        if (amdgpu_has_atpx() &&
            (amdgpu_is_atpx_hybrid() ||
             amdgpu_has_atpx_dgpu_power_cntl()) &&
            !pci_is_thunderbolt_attached(adev->pdev))
                vga_switcheroo_register_client(adev->pdev,
                                               &amdgpu_switcheroo_ops, boco);
        if (boco)
                vga_switcheroo_init_domain_pm_ops(adev->dev, &adev->vga_pm_domain);

        if (amdgpu_emu_mode == 1) {
                /* post the asic on emulation mode */
                emu_soc_asic_init(adev);
                goto fence_driver_init;
        }

        /* detect if we are with an SRIOV vbios */
        amdgpu_device_detect_sriov_bios(adev);

        /* check if we need to reset the asic
         *  E.g., driver was not cleanly unloaded previously, etc.
         */
        if (!amdgpu_sriov_vf(adev) && amdgpu_asic_need_reset_on_init(adev)) {
                r = amdgpu_asic_reset(adev);
                if (r) {
                        dev_err(adev->dev, "asic reset on init failed\n");
                        goto failed;
                }
        }

        pci_enable_pcie_error_reporting(adev->ddev.pdev);

        /* Post card if necessary */
        if (amdgpu_device_need_post(adev)) {
                if (!adev->bios) {
                        dev_err(adev->dev, "no vBIOS found\n");
                        r = -EINVAL;
                        goto failed;
                }
                DRM_INFO("GPU posting now...\n");
                r = amdgpu_device_asic_init(adev);
                if (r) {
                        dev_err(adev->dev, "gpu post error!\n");
                        goto failed;
                }
        }

        if (adev->is_atom_fw) {
                /* Initialize clocks */
                r = amdgpu_atomfirmware_get_clock_info(adev);
                if (r) {
                        dev_err(adev->dev, "amdgpu_atomfirmware_get_clock_info failed\n");
                        amdgpu_vf_error_put(adev, AMDGIM_ERROR_VF_ATOMBIOS_GET_CLOCK_FAIL, 0, 0);
                        goto failed;
                }
        } else {
                /* Initialize clocks */
                r = amdgpu_atombios_get_clock_info(adev);
                if (r) {
                        dev_err(adev->dev, "amdgpu_atombios_get_clock_info failed\n");
                        amdgpu_vf_error_put(adev, AMDGIM_ERROR_VF_ATOMBIOS_GET_CLOCK_FAIL, 0, 0);
                        goto failed;
                }
                /* init i2c buses */
                if (!amdgpu_device_has_dc_support(adev))
                        amdgpu_atombios_i2c_init(adev);
        }

fence_driver_init:
        /* Fence driver */
        r = amdgpu_fence_driver_init(adev);
        if (r) {
                dev_err(adev->dev, "amdgpu_fence_driver_init failed\n");
                amdgpu_vf_error_put(adev, AMDGIM_ERROR_VF_FENCE_INIT_FAIL, 0, 0);
                goto failed;
        }

        /* init the mode config */
        drm_mode_config_init(adev_to_drm(adev));

        r = amdgpu_device_ip_init(adev);
        if (r) {
                /* failed in exclusive mode due to timeout */
                if (amdgpu_sriov_vf(adev) &&
                    !amdgpu_sriov_runtime(adev) &&
                    amdgpu_virt_mmio_blocked(adev) &&
                    !amdgpu_virt_wait_reset(adev)) {
                        dev_err(adev->dev, "VF exclusive mode timeout\n");
                        /* Don't send request since VF is inactive. */
                        adev->virt.caps &= ~AMDGPU_SRIOV_CAPS_RUNTIME;
                        adev->virt.ops = NULL;
                        r = -EAGAIN;
                        goto failed;
                }
                dev_err(adev->dev, "amdgpu_device_ip_init failed\n");
                amdgpu_vf_error_put(adev, AMDGIM_ERROR_VF_AMDGPU_INIT_FAIL, 0, 0);
                goto failed;
        }

        dev_info(adev->dev,
                "SE %d, SH per SE %d, CU per SH %d, active_cu_number %d\n",
                        adev->gfx.config.max_shader_engines,
                        adev->gfx.config.max_sh_per_se,
                        adev->gfx.config.max_cu_per_sh,
                        adev->gfx.cu_info.number);

        adev->accel_working = true;

        amdgpu_vm_check_compute_bug(adev);

        /* Initialize the buffer migration limit. */
        if (amdgpu_moverate >= 0)
                max_MBps = amdgpu_moverate;
        else
                max_MBps = 8; /* Allow 8 MB/s. */
        /* Get a log2 for easy divisions. */
        adev->mm_stats.log2_max_MBps = ilog2(max(1u, max_MBps));

        amdgpu_fbdev_init(adev);

        r = amdgpu_pm_sysfs_init(adev);
        if (r) {
                adev->pm_sysfs_en = false;
                DRM_ERROR("registering pm debugfs failed (%d).\n", r);
        } else
                adev->pm_sysfs_en = true;

        r = amdgpu_ucode_sysfs_init(adev);
        if (r) {
                adev->ucode_sysfs_en = false;
                DRM_ERROR("Creating firmware sysfs failed (%d).\n", r);
        } else
                adev->ucode_sysfs_en = true;

        if ((amdgpu_testing & 1)) {
                if (adev->accel_working)
                        amdgpu_test_moves(adev);
                else
                        DRM_INFO("amdgpu: acceleration disabled, skipping move tests\n");
        }
        if (amdgpu_benchmarking) {
                if (adev->accel_working)
                        amdgpu_benchmark(adev, amdgpu_benchmarking);
                else
                        DRM_INFO("amdgpu: acceleration disabled, skipping benchmarks\n");
        }

        /*
         * Register gpu instance before amdgpu_device_enable_mgpu_fan_boost.
         * Otherwise the mgpu fan boost feature will be skipped due to the
         * gpu instance is counted less.
         */
        amdgpu_register_gpu_instance(adev);

        /* enable clockgating, etc. after ib tests, etc. since some blocks require
         * explicit gating rather than handling it automatically.
         */
        r = amdgpu_device_ip_late_init(adev);
        if (r) {
                dev_err(adev->dev, "amdgpu_device_ip_late_init failed\n");
                amdgpu_vf_error_put(adev, AMDGIM_ERROR_VF_AMDGPU_LATE_INIT_FAIL, 0, r);
                goto failed;
        }

        /* must succeed. */
        amdgpu_ras_resume(adev);

        queue_delayed_work(system_wq, &adev->delayed_init_work,
                           msecs_to_jiffies(AMDGPU_RESUME_MS));

        if (amdgpu_sriov_vf(adev))
                flush_delayed_work(&adev->delayed_init_work);

        r = sysfs_create_files(&adev->dev->kobj, amdgpu_dev_attributes);
        if (r)
                dev_err(adev->dev, "Could not create amdgpu device attr\n");

        if (IS_ENABLED(CONFIG_PERF_EVENTS))
                r = amdgpu_pmu_init(adev);
        if (r)
                dev_err(adev->dev, "amdgpu_pmu_init failed\n");

        /* Have stored pci confspace at hand for restore in sudden PCI error */
        if (amdgpu_device_cache_pci_state(adev->pdev))
                pci_restore_state(pdev);

        return 0;

failed:
        amdgpu_vf_error_trans_all(adev);
        if (boco)
                vga_switcheroo_fini_domain_pm_ops(adev->dev);

failed_unmap:
        iounmap(adev->rmmio);
        adev->rmmio = NULL;

        return r;
}

/**
 * amdgpu_device_fini - tear down the driver
 *
 * @adev: amdgpu_device pointer
 *
 * Tear down the driver info (all asics).
 * Called at driver shutdown.
 */
void amdgpu_device_fini(struct amdgpu_device *adev)
{
        dev_info(adev->dev, "amdgpu: finishing device.\n");
        flush_delayed_work(&adev->delayed_init_work);
        adev->shutdown = true;

        kfree(adev->pci_state);

        /* make sure IB test finished before entering exclusive mode
         * to avoid preemption on IB test
         * */
        if (amdgpu_sriov_vf(adev)) {
                amdgpu_virt_request_full_gpu(adev, false);
                amdgpu_virt_fini_data_exchange(adev);
        }

        /* disable all interrupts */
        amdgpu_irq_disable_all(adev);
        if (adev->mode_info.mode_config_initialized){
                if (!amdgpu_device_has_dc_support(adev))
                        drm_helper_force_disable_all(adev_to_drm(adev));
                else
                        drm_atomic_helper_shutdown(adev_to_drm(adev));
        }
        amdgpu_fence_driver_fini(adev);
        if (adev->pm_sysfs_en)
                amdgpu_pm_sysfs_fini(adev);
        amdgpu_fbdev_fini(adev);
        amdgpu_device_ip_fini(adev);
        release_firmware(adev->firmware.gpu_info_fw);
        adev->firmware.gpu_info_fw = NULL;
        adev->accel_working = false;
        /* free i2c buses */
        if (!amdgpu_device_has_dc_support(adev))
                amdgpu_i2c_fini(adev);

        if (amdgpu_emu_mode != 1)
                amdgpu_atombios_fini(adev);

        kfree(adev->bios);
        adev->bios = NULL;
        if (amdgpu_has_atpx() &&
            (amdgpu_is_atpx_hybrid() ||
             amdgpu_has_atpx_dgpu_power_cntl()) &&
            !pci_is_thunderbolt_attached(adev->pdev))
                vga_switcheroo_unregister_client(adev->pdev);
        if (amdgpu_device_supports_boco(adev_to_drm(adev)))
                vga_switcheroo_fini_domain_pm_ops(adev->dev);
        vga_client_register(adev->pdev, NULL, NULL, NULL);
        if (adev->rio_mem)
                pci_iounmap(adev->pdev, adev->rio_mem);
        adev->rio_mem = NULL;
        iounmap(adev->rmmio);
        adev->rmmio = NULL;
        amdgpu_device_doorbell_fini(adev);

        if (adev->ucode_sysfs_en)
                amdgpu_ucode_sysfs_fini(adev);

        sysfs_remove_files(&adev->dev->kobj, amdgpu_dev_attributes);
        if (IS_ENABLED(CONFIG_PERF_EVENTS))
                amdgpu_pmu_fini(adev);
        if (adev->mman.discovery_bin)
                amdgpu_discovery_fini(adev);
}


/*
 * Suspend & resume.
 */
/**
 * amdgpu_device_suspend - initiate device suspend
 *
 * @dev: drm dev pointer
 * @fbcon : notify the fbdev of suspend
 *
 * Puts the hw in the suspend state (all asics).
 * Returns 0 for success or an error on failure.
 * Called at driver suspend.
 */
int amdgpu_device_suspend(struct drm_device *dev, bool fbcon)
{
        struct amdgpu_device *adev;
        struct drm_crtc *crtc;
        struct drm_connector *connector;
        struct drm_connector_list_iter iter;
        int r;

        adev = drm_to_adev(dev);

        if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
                return 0;

        adev->in_suspend = true;
        drm_kms_helper_poll_disable(dev);

        if (fbcon)
                amdgpu_fbdev_set_suspend(adev, 1);

        cancel_delayed_work_sync(&adev->delayed_init_work);

        if (!amdgpu_device_has_dc_support(adev)) {
                /* turn off display hw */
                drm_modeset_lock_all(dev);
                drm_connector_list_iter_begin(dev, &iter);
                drm_for_each_connector_iter(connector, &iter)
                        drm_helper_connector_dpms(connector,
                                                  DRM_MODE_DPMS_OFF);
                drm_connector_list_iter_end(&iter);
                drm_modeset_unlock_all(dev);
                        /* unpin the front buffers and cursors */
                list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
                        struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
                        struct drm_framebuffer *fb = crtc->primary->fb;
                        struct amdgpu_bo *robj;

                        if (amdgpu_crtc->cursor_bo && !adev->enable_virtual_display) {
                                struct amdgpu_bo *aobj = gem_to_amdgpu_bo(amdgpu_crtc->cursor_bo);
                                r = amdgpu_bo_reserve(aobj, true);
                                if (r == 0) {
                                        amdgpu_bo_unpin(aobj);
                                        amdgpu_bo_unreserve(aobj);
                                }
                        }

                        if (fb == NULL || fb->obj[0] == NULL) {
                                continue;
                        }
                        robj = gem_to_amdgpu_bo(fb->obj[0]);
                        /* don't unpin kernel fb objects */
                        if (!amdgpu_fbdev_robj_is_fb(adev, robj)) {
                                r = amdgpu_bo_reserve(robj, true);
                                if (r == 0) {
                                        amdgpu_bo_unpin(robj);
                                        amdgpu_bo_unreserve(robj);
                                }
                        }
                }
        }

        amdgpu_ras_suspend(adev);

        r = amdgpu_device_ip_suspend_phase1(adev);

        amdgpu_amdkfd_suspend(adev, !fbcon);

        /* evict vram memory */
        amdgpu_bo_evict_vram(adev);

        amdgpu_fence_driver_suspend(adev);

        r = amdgpu_device_ip_suspend_phase2(adev);

        /* evict remaining vram memory
         * This second call to evict vram is to evict the gart page table
         * using the CPU.
         */
        amdgpu_bo_evict_vram(adev);

        return 0;
}

/**
 * amdgpu_device_resume - initiate device resume
 *
 * @dev: drm dev pointer
 * @fbcon : notify the fbdev of resume
 *
 * Bring the hw back to operating state (all asics).
 * Returns 0 for success or an error on failure.
 * Called at driver resume.
 */
int amdgpu_device_resume(struct drm_device *dev, bool fbcon)
{
        struct drm_connector *connector;
        struct drm_connector_list_iter iter;
        struct amdgpu_device *adev = drm_to_adev(dev);
        struct drm_crtc *crtc;
        int r = 0;

        if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
                return 0;

        /* post card */
        if (amdgpu_device_need_post(adev)) {
                r = amdgpu_device_asic_init(adev);
                if (r)
                        dev_err(adev->dev, "amdgpu asic init failed\n");
        }

        r = amdgpu_device_ip_resume(adev);
        if (r) {
                dev_err(adev->dev, "amdgpu_device_ip_resume failed (%d).\n", r);
                return r;
        }
        amdgpu_fence_driver_resume(adev);


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

        queue_delayed_work(system_wq, &adev->delayed_init_work,
                           msecs_to_jiffies(AMDGPU_RESUME_MS));

        if (!amdgpu_device_has_dc_support(adev)) {
                /* pin cursors */
                list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
                        struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);

                        if (amdgpu_crtc->cursor_bo && !adev->enable_virtual_display) {
                                struct amdgpu_bo *aobj = gem_to_amdgpu_bo(amdgpu_crtc->cursor_bo);
                                r = amdgpu_bo_reserve(aobj, true);
                                if (r == 0) {
                                        r = amdgpu_bo_pin(aobj, AMDGPU_GEM_DOMAIN_VRAM);
                                        if (r != 0)
                                                dev_err(adev->dev, "Failed to pin cursor BO (%d)\n", r);
                                        amdgpu_crtc->cursor_addr = amdgpu_bo_gpu_offset(aobj);
                                        amdgpu_bo_unreserve(aobj);
                                }
                        }
                }
        }
        r = amdgpu_amdkfd_resume(adev, !fbcon);
        if (r)
                return r;

        /* Make sure IB tests flushed */
        flush_delayed_work(&adev->delayed_init_work);

        /* blat the mode back in */
        if (fbcon) {
                if (!amdgpu_device_has_dc_support(adev)) {
                        /* pre DCE11 */
                        drm_helper_resume_force_mode(dev);

                        /* turn on display hw */
                        drm_modeset_lock_all(dev);

                        drm_connector_list_iter_begin(dev, &iter);
                        drm_for_each_connector_iter(connector, &iter)
                                drm_helper_connector_dpms(connector,
                                                          DRM_MODE_DPMS_ON);
                        drm_connector_list_iter_end(&iter);

                        drm_modeset_unlock_all(dev);
                }
                amdgpu_fbdev_set_suspend(adev, 0);
        }

        drm_kms_helper_poll_enable(dev);

        amdgpu_ras_resume(adev);

        /*
         * Most of the connector probing functions try to acquire runtime pm
         * refs to ensure that the GPU is powered on when connector polling is
         * performed. Since we're calling this from a runtime PM callback,
         * trying to acquire rpm refs will cause us to deadlock.
         *
         * Since we're guaranteed to be holding the rpm lock, it's safe to
         * temporarily disable the rpm helpers so this doesn't deadlock us.
         */
#ifdef CONFIG_PM
        dev->dev->power.disable_depth++;
#endif
        if (!amdgpu_device_has_dc_support(adev))
                drm_helper_hpd_irq_event(dev);
        else
                drm_kms_helper_hotplug_event(dev);
#ifdef CONFIG_PM
        dev->dev->power.disable_depth--;
#endif
        adev->in_suspend = false;

        return 0;
}

/**
 * amdgpu_device_ip_check_soft_reset - did soft reset succeed
 *
 * @adev: amdgpu_device pointer
 *
 * The list of all the hardware IPs that make up the asic is walked and
 * the check_soft_reset callbacks are run.  check_soft_reset determines
 * if the asic is still hung or not.
 * Returns true if any of the IPs are still in a hung state, false if not.
 */
static bool amdgpu_device_ip_check_soft_reset(struct amdgpu_device *adev)
{
        int i;
        bool asic_hang = false;

        if (amdgpu_sriov_vf(adev))
                return true;

        if (amdgpu_asic_need_full_reset(adev))
                return true;

        for (i = 0; i < adev->num_ip_blocks; i++) {
                if (!adev->ip_blocks[i].status.valid)
                        continue;
                if (adev->ip_blocks[i].version->funcs->check_soft_reset)
                        adev->ip_blocks[i].status.hang =
                                adev->ip_blocks[i].version->funcs->check_soft_reset(adev);
                if (adev->ip_blocks[i].status.hang) {
                        dev_info(adev->dev, "IP block:%s is hung!\n", adev->ip_blocks[i].version->funcs->name);
                        asic_hang = true;
                }
        }
        return asic_hang;
}

/**
 * amdgpu_device_ip_pre_soft_reset - prepare for soft reset
 *
 * @adev: amdgpu_device pointer
 *
 * The list of all the hardware IPs that make up the asic is walked and the
 * pre_soft_reset callbacks are run if the block is hung.  pre_soft_reset
 * handles any IP specific hardware or software state changes that are
 * necessary for a soft reset to succeed.
 * Returns 0 on success, negative error code on failure.
 */
static int amdgpu_device_ip_pre_soft_reset(struct amdgpu_device *adev)
{
        int i, r = 0;

        for (i = 0; i < adev->num_ip_blocks; i++) {
                if (!adev->ip_blocks[i].status.valid)
                        continue;
                if (adev->ip_blocks[i].status.hang &&
                    adev->ip_blocks[i].version->funcs->pre_soft_reset) {
                        r = adev->ip_blocks[i].version->funcs->pre_soft_reset(adev);
                        if (r)
                                return r;
                }
        }

        return 0;
}

/**
 * amdgpu_device_ip_need_full_reset - check if a full asic reset is needed
 *
 * @adev: amdgpu_device pointer
 *
 * Some hardware IPs cannot be soft reset.  If they are hung, a full gpu
 * reset is necessary to recover.
 * Returns true if a full asic reset is required, false if not.
 */
static bool amdgpu_device_ip_need_full_reset(struct amdgpu_device *adev)
{
        int i;

        if (amdgpu_asic_need_full_reset(adev))
                return true;

        for (i = 0; i < adev->num_ip_blocks; i++) {
                if (!adev->ip_blocks[i].status.valid)
                        continue;
                if ((adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_GMC) ||
                    (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_SMC) ||
                    (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_ACP) ||
                    (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_DCE) ||
                     adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_PSP) {
                        if (adev->ip_blocks[i].status.hang) {
                                dev_info(adev->dev, "Some block need full reset!\n");
                                return true;
                        }
                }
        }
        return false;
}

/**
 * amdgpu_device_ip_soft_reset - do a soft reset
 *
 * @adev: amdgpu_device pointer
 *
 * The list of all the hardware IPs that make up the asic is walked and the
 * soft_reset callbacks are run if the block is hung.  soft_reset handles any
 * IP specific hardware or software state changes that are necessary to soft
 * reset the IP.
 * Returns 0 on success, negative error code on failure.
 */
static int amdgpu_device_ip_soft_reset(struct amdgpu_device *adev)
{
        int i, r = 0;

        for (i = 0; i < adev->num_ip_blocks; i++) {
                if (!adev->ip_blocks[i].status.valid)
                        continue;
                if (adev->ip_blocks[i].status.hang &&
                    adev->ip_blocks[i].version->funcs->soft_reset) {
                        r = adev->ip_blocks[i].version->funcs->soft_reset(adev);
                        if (r)
                                return r;
                }
        }

        return 0;
}

/**
 * amdgpu_device_ip_post_soft_reset - clean up from soft reset
 *
 * @adev: amdgpu_device pointer
 *
 * The list of all the hardware IPs that make up the asic is walked and the
 * post_soft_reset callbacks are run if the asic was hung.  post_soft_reset
 * handles any IP specific hardware or software state changes that are
 * necessary after the IP has been soft reset.
 * Returns 0 on success, negative error code on failure.
 */
static int amdgpu_device_ip_post_soft_reset(struct amdgpu_device *adev)
{
        int i, r = 0;

        for (i = 0; i < adev->num_ip_blocks; i++) {
                if (!adev->ip_blocks[i].status.valid)
                        continue;
                if (adev->ip_blocks[i].status.hang &&
                    adev->ip_blocks[i].version->funcs->post_soft_reset)
                        r = adev->ip_blocks[i].version->funcs->post_soft_reset(adev);
                if (r)
                        return r;
        }

        return 0;
}

/**
 * amdgpu_device_recover_vram - Recover some VRAM contents
 *
 * @adev: amdgpu_device pointer
 *
 * Restores the contents of VRAM buffers from the shadows in GTT.  Used to
 * restore things like GPUVM page tables after a GPU reset where
 * the contents of VRAM might be lost.
 *
 * Returns:
 * 0 on success, negative error code on failure.
 */
static int amdgpu_device_recover_vram(struct amdgpu_device *adev)
{
        struct dma_fence *fence = NULL, *next = NULL;
        struct amdgpu_bo *shadow;
        long r = 1, tmo;

        if (amdgpu_sriov_runtime(adev))
                tmo = msecs_to_jiffies(8000);
        else
                tmo = msecs_to_jiffies(100);

        dev_info(adev->dev, "recover vram bo from shadow start\n");
        mutex_lock(&adev->shadow_list_lock);
        list_for_each_entry(shadow, &adev->shadow_list, shadow_list) {

                /* No need to recover an evicted BO */
                if (shadow->tbo.mem.mem_type != TTM_PL_TT ||
                    shadow->tbo.mem.start == AMDGPU_BO_INVALID_OFFSET ||
                    shadow->parent->tbo.mem.mem_type != TTM_PL_VRAM)
                        continue;

                r = amdgpu_bo_restore_shadow(shadow, &next);
                if (r)
                        break;

                if (fence) {
                        tmo = dma_fence_wait_timeout(fence, false, tmo);
                        dma_fence_put(fence);
                        fence = next;
                        if (tmo == 0) {
                                r = -ETIMEDOUT;
                                break;
                        } else if (tmo < 0) {
                                r = tmo;
                                break;
                        }
                } else {
                        fence = next;
                }
        }
        mutex_unlock(&adev->shadow_list_lock);

        if (fence)
                tmo = dma_fence_wait_timeout(fence, false, tmo);
        dma_fence_put(fence);

        if (r < 0 || tmo <= 0) {
                dev_err(adev->dev, "recover vram bo from shadow failed, r is %ld, tmo is %ld\n", r, tmo);
                return -EIO;
        }

        dev_info(adev->dev, "recover vram bo from shadow done\n");
        return 0;
}


/**
 * amdgpu_device_reset_sriov - reset ASIC for SR-IOV vf
 *
 * @adev: amdgpu_device pointer
 * @from_hypervisor: request from hypervisor
 *
 * do VF FLR and reinitialize Asic
 * return 0 means succeeded otherwise failed
 */
static int amdgpu_device_reset_sriov(struct amdgpu_device *adev,
                                     bool from_hypervisor)
{
        int r;

        if (from_hypervisor)
                r = amdgpu_virt_request_full_gpu(adev, true);
        else
                r = amdgpu_virt_reset_gpu(adev);
        if (r)
                return r;

        amdgpu_amdkfd_pre_reset(adev);

        /* Resume IP prior to SMC */
        r = amdgpu_device_ip_reinit_early_sriov(adev);
        if (r)
                goto error;

        amdgpu_virt_init_data_exchange(adev);
        /* we need recover gart prior to run SMC/CP/SDMA resume */
        amdgpu_gtt_mgr_recover(ttm_manager_type(&adev->mman.bdev, TTM_PL_TT));

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

        /* now we are okay to resume SMC/CP/SDMA */
        r = amdgpu_device_ip_reinit_late_sriov(adev);
        if (r)
                goto error;

        amdgpu_irq_gpu_reset_resume_helper(adev);
        r = amdgpu_ib_ring_tests(adev);
        amdgpu_amdkfd_post_reset(adev);

error:
        amdgpu_virt_release_full_gpu(adev, true);
        if (!r && adev->virt.gim_feature & AMDGIM_FEATURE_GIM_FLR_VRAMLOST) {
                amdgpu_inc_vram_lost(adev);
                r = amdgpu_device_recover_vram(adev);
        }

        return r;
}

/**
 * amdgpu_device_has_job_running - check if there is any job in mirror list
 *
 * @adev: amdgpu_device pointer
 *
 * check if there is any job in mirror list
 */
bool amdgpu_device_has_job_running(struct amdgpu_device *adev)
{
        int i;
        struct drm_sched_job *job;

        for (i = 0; i < AMDGPU_MAX_RINGS; ++i) {
                struct amdgpu_ring *ring = adev->rings[i];

                if (!ring || !ring->sched.thread)
                        continue;

                spin_lock(&ring->sched.job_list_lock);
                job = list_first_entry_or_null(&ring->sched.pending_list,
                                               struct drm_sched_job, list);
                spin_unlock(&ring->sched.job_list_lock);
                if (job)
                        return true;
        }
        return false;
}

/**
 * amdgpu_device_should_recover_gpu - check if we should try GPU recovery
 *
 * @adev: amdgpu_device pointer
 *
 * Check amdgpu_gpu_recovery and SRIOV status to see if we should try to recover
 * a hung GPU.
 */
bool amdgpu_device_should_recover_gpu(struct amdgpu_device *adev)
{
        if (!amdgpu_device_ip_check_soft_reset(adev)) {
                dev_info(adev->dev, "Timeout, but no hardware hang detected.\n");
                return false;
        }

        if (amdgpu_gpu_recovery == 0)
                goto disabled;

        if (amdgpu_sriov_vf(adev))
                return true;

        if (amdgpu_gpu_recovery == -1) {
                switch (adev->asic_type) {
                case CHIP_BONAIRE:
                case CHIP_HAWAII:
                case CHIP_TOPAZ:
                case CHIP_TONGA:
                case CHIP_FIJI:
                case CHIP_POLARIS10:
                case CHIP_POLARIS11:
                case CHIP_POLARIS12:
                case CHIP_VEGAM:
                case CHIP_VEGA20:
                case CHIP_VEGA10:
                case CHIP_VEGA12:
                case CHIP_RAVEN:
                case CHIP_ARCTURUS:
                case CHIP_RENOIR:
                case CHIP_NAVI10:
                case CHIP_NAVI14:
                case CHIP_NAVI12:
                case CHIP_SIENNA_CICHLID:
                        break;
                default:
                        goto disabled;
                }
        }

        return true;

disabled:
                dev_info(adev->dev, "GPU recovery disabled.\n");
                return false;
}


static int amdgpu_device_pre_asic_reset(struct amdgpu_device *adev,
                                        struct amdgpu_job *job,
                                        bool *need_full_reset_arg)
{
        int i, r = 0;
        bool need_full_reset  = *need_full_reset_arg;

        amdgpu_debugfs_wait_dump(adev);

        if (amdgpu_sriov_vf(adev)) {
                /* stop the data exchange thread */
                amdgpu_virt_fini_data_exchange(adev);
        }

        /* block all schedulers and reset given job's ring */
        for (i = 0; i < AMDGPU_MAX_RINGS; ++i) {
                struct amdgpu_ring *ring = adev->rings[i];

                if (!ring || !ring->sched.thread)
                        continue;

                /* after all hw jobs are reset, hw fence is meaningless, so force_completion */
                amdgpu_fence_driver_force_completion(ring);
        }

        if(job)
                drm_sched_increase_karma(&job->base);

        /* Don't suspend on bare metal if we are not going to HW reset the ASIC */
        if (!amdgpu_sriov_vf(adev)) {

                if (!need_full_reset)
                        need_full_reset = amdgpu_device_ip_need_full_reset(adev);

                if (!need_full_reset) {
                        amdgpu_device_ip_pre_soft_reset(adev);
                        r = amdgpu_device_ip_soft_reset(adev);
                        amdgpu_device_ip_post_soft_reset(adev);
                        if (r || amdgpu_device_ip_check_soft_reset(adev)) {
                                dev_info(adev->dev, "soft reset failed, will fallback to full reset!\n");
                                need_full_reset = true;
                        }
                }

                if (need_full_reset)
                        r = amdgpu_device_ip_suspend(adev);

                *need_full_reset_arg = need_full_reset;
        }

        return r;
}

static int amdgpu_do_asic_reset(struct amdgpu_hive_info *hive,
                               struct list_head *device_list_handle,
                               bool *need_full_reset_arg,
                               bool skip_hw_reset)
{
        struct amdgpu_device *tmp_adev = NULL;
        bool need_full_reset = *need_full_reset_arg, vram_lost = false;
        int r = 0;

        /*
         * ASIC reset has to be done on all HGMI hive nodes ASAP
         * to allow proper links negotiation in FW (within 1 sec)
         */
        if (!skip_hw_reset && need_full_reset) {
                list_for_each_entry(tmp_adev, device_list_handle, gmc.xgmi.head) {
                        /* For XGMI run all resets in parallel to speed up the process */
                        if (tmp_adev->gmc.xgmi.num_physical_nodes > 1) {
                                if (!queue_work(system_unbound_wq, &tmp_adev->xgmi_reset_work))
                                        r = -EALREADY;
                        } else
                                r = amdgpu_asic_reset(tmp_adev);

                        if (r) {
                                dev_err(tmp_adev->dev, "ASIC reset failed with error, %d for drm dev, %s",
                                         r, adev_to_drm(tmp_adev)->unique);
                                break;
                        }
                }

                /* For XGMI wait for all resets to complete before proceed */
                if (!r) {
                        list_for_each_entry(tmp_adev, device_list_handle,
                                            gmc.xgmi.head) {
                                if (tmp_adev->gmc.xgmi.num_physical_nodes > 1) {
                                        flush_work(&tmp_adev->xgmi_reset_work);
                                        r = tmp_adev->asic_reset_res;
                                        if (r)
                                                break;
                                }
                        }
                }
        }

        if (!r && amdgpu_ras_intr_triggered()) {
                list_for_each_entry(tmp_adev, device_list_handle, gmc.xgmi.head) {
                        if (tmp_adev->mmhub.funcs &&
                            tmp_adev->mmhub.funcs->reset_ras_error_count)
                                tmp_adev->mmhub.funcs->reset_ras_error_count(tmp_adev);
                }

                amdgpu_ras_intr_cleared();
        }

        list_for_each_entry(tmp_adev, device_list_handle, gmc.xgmi.head) {
                if (need_full_reset) {
                        /* post card */
                        if (amdgpu_device_asic_init(tmp_adev))
                                dev_warn(tmp_adev->dev, "asic atom init failed!");

                        if (!r) {
                                dev_info(tmp_adev->dev, "GPU reset succeeded, trying to resume\n");
                                r = amdgpu_device_ip_resume_phase1(tmp_adev);
                                if (r)
                                        goto out;

                                vram_lost = amdgpu_device_check_vram_lost(tmp_adev);
                                if (vram_lost) {
                                        DRM_INFO("VRAM is lost due to GPU reset!\n");
                                        amdgpu_inc_vram_lost(tmp_adev);
                                }

                                r = amdgpu_gtt_mgr_recover(ttm_manager_type(&tmp_adev->mman.bdev, TTM_PL_TT));
                                if (r)
                                        goto out;

                                r = amdgpu_device_fw_loading(tmp_adev);
                                if (r)
                                        return r;

                                r = amdgpu_device_ip_resume_phase2(tmp_adev);
                                if (r)
                                        goto out;

                                if (vram_lost)
                                        amdgpu_device_fill_reset_magic(tmp_adev);

                                /*
                                 * Add this ASIC as tracked as reset was already
                                 * complete successfully.
                                 */
                                amdgpu_register_gpu_instance(tmp_adev);

                                r = amdgpu_device_ip_late_init(tmp_adev);
                                if (r)
                                        goto out;

                                amdgpu_fbdev_set_suspend(tmp_adev, 0);

                                /*
                                 * The GPU enters bad state once faulty pages
                                 * by ECC has reached the threshold, and ras
                                 * recovery is scheduled next. So add one check
                                 * here to break recovery if it indeed exceeds
                                 * bad page threshold, and remind user to
                                 * retire this GPU or setting one bigger
                                 * bad_page_threshold value to fix this once
                                 * probing driver again.
                                 */
                                if (!amdgpu_ras_check_err_threshold(tmp_adev)) {
                                        /* must succeed. */
                                        amdgpu_ras_resume(tmp_adev);
                                } else {
                                        r = -EINVAL;
                                        goto out;
                                }

                                /* Update PSP FW topology after reset */
                                if (hive && tmp_adev->gmc.xgmi.num_physical_nodes > 1)
                                        r = amdgpu_xgmi_update_topology(hive, tmp_adev);
                        }
                }

out:
                if (!r) {
                        amdgpu_irq_gpu_reset_resume_helper(tmp_adev);
                        r = amdgpu_ib_ring_tests(tmp_adev);
                        if (r) {
                                dev_err(tmp_adev->dev, "ib ring test failed (%d).\n", r);
                                r = amdgpu_device_ip_suspend(tmp_adev);
                                need_full_reset = true;
                                r = -EAGAIN;
                                goto end;
                        }
                }

                if (!r)
                        r = amdgpu_device_recover_vram(tmp_adev);
                else
                        tmp_adev->asic_reset_res = r;
        }

end:
        *need_full_reset_arg = need_full_reset;
        return r;
}

static bool amdgpu_device_lock_adev(struct amdgpu_device *adev,
                                struct amdgpu_hive_info *hive)
{
        if (atomic_cmpxchg(&adev->in_gpu_reset, 0, 1) != 0)
                return false;

        if (hive) {
                down_write_nest_lock(&adev->reset_sem, &hive->hive_lock);
        } else {
                down_write(&adev->reset_sem);
        }

        atomic_inc(&adev->gpu_reset_counter);
        switch (amdgpu_asic_reset_method(adev)) {
        case AMD_RESET_METHOD_MODE1:
                adev->mp1_state = PP_MP1_STATE_SHUTDOWN;
                break;
        case AMD_RESET_METHOD_MODE2:
                adev->mp1_state = PP_MP1_STATE_RESET;
                break;
        default:
                adev->mp1_state = PP_MP1_STATE_NONE;
                break;
        }

        return true;
}

static void amdgpu_device_unlock_adev(struct amdgpu_device *adev)
{
        amdgpu_vf_error_trans_all(adev);
        adev->mp1_state = PP_MP1_STATE_NONE;
        atomic_set(&adev->in_gpu_reset, 0);
        up_write(&adev->reset_sem);
}

static void amdgpu_device_resume_display_audio(struct amdgpu_device *adev)
{
        struct pci_dev *p = NULL;

        p = pci_get_domain_bus_and_slot(pci_domain_nr(adev->pdev->bus),
                        adev->pdev->bus->number, 1);
        if (p) {
                pm_runtime_enable(&(p->dev));
                pm_runtime_resume(&(p->dev));
        }
}

static int amdgpu_device_suspend_display_audio(struct amdgpu_device *adev)
{
        enum amd_reset_method reset_method;
        struct pci_dev *p = NULL;
        u64 expires;

        /*
         * For now, only BACO and mode1 reset are confirmed
         * to suffer the audio issue without proper suspended.
         */
        reset_method = amdgpu_asic_reset_method(adev);
        if ((reset_method != AMD_RESET_METHOD_BACO) &&
             (reset_method != AMD_RESET_METHOD_MODE1))
                return -EINVAL;

        p = pci_get_domain_bus_and_slot(pci_domain_nr(adev->pdev->bus),
                        adev->pdev->bus->number, 1);
        if (!p)
                return -ENODEV;

        expires = pm_runtime_autosuspend_expiration(&(p->dev));
        if (!expires)
                /*
                 * If we cannot get the audio device autosuspend delay,
                 * a fixed 4S interval will be used. Considering 3S is
                 * the audio controller default autosuspend delay setting.
                 * 4S used here is guaranteed to cover that.
                 */
                expires = ktime_get_mono_fast_ns() + NSEC_PER_SEC * 4ULL;

        while (!pm_runtime_status_suspended(&(p->dev))) {
                if (!pm_runtime_suspend(&(p->dev)))
                        break;

                if (expires < ktime_get_mono_fast_ns()) {
                        dev_warn(adev->dev, "failed to suspend display audio\n");
                        /* TODO: abort the succeeding gpu reset? */
                        return -ETIMEDOUT;
                }
        }

        pm_runtime_disable(&(p->dev));

        return 0;
}

/**
 * amdgpu_device_gpu_recover - reset the asic and recover scheduler
 *
 * @adev: amdgpu_device pointer
 * @job: which job trigger hang
 *
 * Attempt to reset the GPU if it has hung (all asics).
 * Attempt to do soft-reset or full-reset and reinitialize Asic
 * Returns 0 for success or an error on failure.
 */

int amdgpu_device_gpu_recover(struct amdgpu_device *adev,
                              struct amdgpu_job *job)
{
        struct list_head device_list, *device_list_handle =  NULL;
        bool need_full_reset = false;
        bool job_signaled = false;
        struct amdgpu_hive_info *hive = NULL;
        struct amdgpu_device *tmp_adev = NULL;
        int i, r = 0;
        bool need_emergency_restart = false;
        bool audio_suspended = false;

        /*
         * Special case: RAS triggered and full reset isn't supported
         */
        need_emergency_restart = amdgpu_ras_need_emergency_restart(adev);

        /*
         * Flush RAM to disk so that after reboot
         * the user can read log and see why the system rebooted.
         */
        if (need_emergency_restart && amdgpu_ras_get_context(adev)->reboot) {
                DRM_WARN("Emergency reboot.");

                ksys_sync_helper();
                emergency_restart();
        }

        dev_info(adev->dev, "GPU %s begin!\n",
                need_emergency_restart ? "jobs stop":"reset");

        /*
         * Here we trylock to avoid chain of resets executing from
         * either trigger by jobs on different adevs in XGMI hive or jobs on
         * different schedulers for same device while this TO handler is running.
         * We always reset all schedulers for device and all devices for XGMI
         * hive so that should take care of them too.
         */
        hive = amdgpu_get_xgmi_hive(adev);
        if (hive) {
                if (atomic_cmpxchg(&hive->in_reset, 0, 1) != 0) {
                        DRM_INFO("Bailing on TDR for s_job:%llx, hive: %llx as another already in progress",
                                job ? job->base.id : -1, hive->hive_id);
                        amdgpu_put_xgmi_hive(hive);
                        return 0;
                }
                mutex_lock(&hive->hive_lock);
        }

        /*
         * Build list of devices to reset.
         * In case we are in XGMI hive mode, resort the device list
         * to put adev in the 1st position.
         */
        INIT_LIST_HEAD(&device_list);
        if (adev->gmc.xgmi.num_physical_nodes > 1) {
                if (!hive)
                        return -ENODEV;
                if (!list_is_first(&adev->gmc.xgmi.head, &hive->device_list))
                        list_rotate_to_front(&adev->gmc.xgmi.head, &hive->device_list);
                device_list_handle = &hive->device_list;
        } else {
                list_add_tail(&adev->gmc.xgmi.head, &device_list);
                device_list_handle = &device_list;
        }

        /* block all schedulers and reset given job's ring */
        list_for_each_entry(tmp_adev, device_list_handle, gmc.xgmi.head) {
                if (!amdgpu_device_lock_adev(tmp_adev, hive)) {
                        dev_info(tmp_adev->dev, "Bailing on TDR for s_job:%llx, as another already in progress",
                                  job ? job->base.id : -1);
                        r = 0;
                        goto skip_recovery;
                }

                /*
                 * Try to put the audio codec into suspend state
                 * before gpu reset started.
                 *
                 * Due to the power domain of the graphics device
                 * is shared with AZ power domain. Without this,
                 * we may change the audio hardware from behind
                 * the audio driver's back. That will trigger
                 * some audio codec errors.
                 */
                if (!amdgpu_device_suspend_display_audio(tmp_adev))
                        audio_suspended = true;

                amdgpu_ras_set_error_query_ready(tmp_adev, false);

                cancel_delayed_work_sync(&tmp_adev->delayed_init_work);

                if (!amdgpu_sriov_vf(tmp_adev))
                        amdgpu_amdkfd_pre_reset(tmp_adev);

                /*
                 * Mark these ASICs to be reseted as untracked first
                 * And add them back after reset completed
                 */
                amdgpu_unregister_gpu_instance(tmp_adev);

                amdgpu_fbdev_set_suspend(tmp_adev, 1);

                /* disable ras on ALL IPs */
                if (!need_emergency_restart &&
                      amdgpu_device_ip_need_full_reset(tmp_adev))
                        amdgpu_ras_suspend(tmp_adev);

                for (i = 0; i < AMDGPU_MAX_RINGS; ++i) {
                        struct amdgpu_ring *ring = tmp_adev->rings[i];

                        if (!ring || !ring->sched.thread)
                                continue;

                        drm_sched_stop(&ring->sched, job ? &job->base : NULL);

                        if (need_emergency_restart)
                                amdgpu_job_stop_all_jobs_on_sched(&ring->sched);
                }
        }

        if (need_emergency_restart)
                goto skip_sched_resume;

        /*
         * Must check guilty signal here since after this point all old
         * HW fences are force signaled.
         *
         * job->base holds a reference to parent fence
         */
        if (job && job->base.s_fence->parent &&
            dma_fence_is_signaled(job->base.s_fence->parent)) {
                job_signaled = true;
                dev_info(adev->dev, "Guilty job already signaled, skipping HW reset");
                goto skip_hw_reset;
        }

retry:  /* Rest of adevs pre asic reset from XGMI hive. */
        list_for_each_entry(tmp_adev, device_list_handle, gmc.xgmi.head) {
                r = amdgpu_device_pre_asic_reset(tmp_adev,
                                                 (tmp_adev == adev) ? job : NULL,
                                                 &need_full_reset);
                /*TODO Should we stop ?*/
                if (r) {
                        dev_err(tmp_adev->dev, "GPU pre asic reset failed with err, %d for drm dev, %s ",
                                  r, adev_to_drm(tmp_adev)->unique);
                        tmp_adev->asic_reset_res = r;
                }
        }

        /* Actual ASIC resets if needed.*/
        /* TODO Implement XGMI hive reset logic for SRIOV */
        if (amdgpu_sriov_vf(adev)) {
                r = amdgpu_device_reset_sriov(adev, job ? false : true);
                if (r)
                        adev->asic_reset_res = r;
        } else {
                r  = amdgpu_do_asic_reset(hive, device_list_handle, &need_full_reset, false);
                if (r && r == -EAGAIN)
                        goto retry;
        }

skip_hw_reset:

        /* Post ASIC reset for all devs .*/
        list_for_each_entry(tmp_adev, device_list_handle, gmc.xgmi.head) {

                for (i = 0; i < AMDGPU_MAX_RINGS; ++i) {
                        struct amdgpu_ring *ring = tmp_adev->rings[i];

                        if (!ring || !ring->sched.thread)
                                continue;

                        /* No point to resubmit jobs if we didn't HW reset*/
                        if (!tmp_adev->asic_reset_res && !job_signaled)
                                drm_sched_resubmit_jobs(&ring->sched);

                        drm_sched_start(&ring->sched, !tmp_adev->asic_reset_res);
                }

                if (!amdgpu_device_has_dc_support(tmp_adev) && !job_signaled) {
                        drm_helper_resume_force_mode(adev_to_drm(tmp_adev));
                }

                tmp_adev->asic_reset_res = 0;

                if (r) {
                        /* bad news, how to tell it to userspace ? */
                        dev_info(tmp_adev->dev, "GPU reset(%d) failed\n", atomic_read(&tmp_adev->gpu_reset_counter));
                        amdgpu_vf_error_put(tmp_adev, AMDGIM_ERROR_VF_GPU_RESET_FAIL, 0, r);
                } else {
                        dev_info(tmp_adev->dev, "GPU reset(%d) succeeded!\n", atomic_read(&tmp_adev->gpu_reset_counter));
                }
        }

skip_sched_resume:
        list_for_each_entry(tmp_adev, device_list_handle, gmc.xgmi.head) {
                /*unlock kfd: SRIOV would do it separately */
                if (!need_emergency_restart && !amdgpu_sriov_vf(tmp_adev))
                        amdgpu_amdkfd_post_reset(tmp_adev);
                if (audio_suspended)
                        amdgpu_device_resume_display_audio(tmp_adev);
                amdgpu_device_unlock_adev(tmp_adev);
        }

skip_recovery:
        if (hive) {
                atomic_set(&hive->in_reset, 0);
                mutex_unlock(&hive->hive_lock);
                amdgpu_put_xgmi_hive(hive);
        }

        if (r)
                dev_info(adev->dev, "GPU reset end with ret = %d\n", r);
        return r;
}

/**
 * amdgpu_device_get_pcie_info - fence pcie info about the PCIE slot
 *
 * @adev: amdgpu_device pointer
 *
 * Fetchs and stores in the driver the PCIE capabilities (gen speed
 * and lanes) of the slot the device is in. Handles APUs and
 * virtualized environments where PCIE config space may not be available.
 */
static void amdgpu_device_get_pcie_info(struct amdgpu_device *adev)
{
        struct pci_dev *pdev;
        enum pci_bus_speed speed_cap, platform_speed_cap;
        enum pcie_link_width platform_link_width;

        if (amdgpu_pcie_gen_cap)
                adev->pm.pcie_gen_mask = amdgpu_pcie_gen_cap;

        if (amdgpu_pcie_lane_cap)
                adev->pm.pcie_mlw_mask = amdgpu_pcie_lane_cap;

        /* covers APUs as well */
        if (pci_is_root_bus(adev->pdev->bus)) {
                if (adev->pm.pcie_gen_mask == 0)
                        adev->pm.pcie_gen_mask = AMDGPU_DEFAULT_PCIE_GEN_MASK;
                if (adev->pm.pcie_mlw_mask == 0)
                        adev->pm.pcie_mlw_mask = AMDGPU_DEFAULT_PCIE_MLW_MASK;
                return;
        }

        if (adev->pm.pcie_gen_mask && adev->pm.pcie_mlw_mask)
                return;

        pcie_bandwidth_available(adev->pdev, NULL,
                                 &platform_speed_cap, &platform_link_width);

        if (adev->pm.pcie_gen_mask == 0) {
                /* asic caps */
                pdev = adev->pdev;
                speed_cap = pcie_get_speed_cap(pdev);
                if (speed_cap == PCI_SPEED_UNKNOWN) {
                        adev->pm.pcie_gen_mask |= (CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN1 |
                                                  CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN2 |
                                                  CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN3);
                } else {
                        if (speed_cap == PCIE_SPEED_16_0GT)
                                adev->pm.pcie_gen_mask |= (CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN1 |
                                                          CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN2 |
                                                          CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN3 |
                                                          CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN4);
                        else if (speed_cap == PCIE_SPEED_8_0GT)
                                adev->pm.pcie_gen_mask |= (CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN1 |
                                                          CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN2 |
                                                          CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN3);
                        else if (speed_cap == PCIE_SPEED_5_0GT)
                                adev->pm.pcie_gen_mask |= (CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN1 |
                                                          CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN2);
                        else
                                adev->pm.pcie_gen_mask |= CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN1;
                }
                /* platform caps */
                if (platform_speed_cap == PCI_SPEED_UNKNOWN) {
                        adev->pm.pcie_gen_mask |= (CAIL_PCIE_LINK_SPEED_SUPPORT_GEN1 |
                                                   CAIL_PCIE_LINK_SPEED_SUPPORT_GEN2);
                } else {
                        if (platform_speed_cap == PCIE_SPEED_16_0GT)
                                adev->pm.pcie_gen_mask |= (CAIL_PCIE_LINK_SPEED_SUPPORT_GEN1 |
                                                           CAIL_PCIE_LINK_SPEED_SUPPORT_GEN2 |
                                                           CAIL_PCIE_LINK_SPEED_SUPPORT_GEN3 |
                                                           CAIL_PCIE_LINK_SPEED_SUPPORT_GEN4);
                        else if (platform_speed_cap == PCIE_SPEED_8_0GT)
                                adev->pm.pcie_gen_mask |= (CAIL_PCIE_LINK_SPEED_SUPPORT_GEN1 |
                                                           CAIL_PCIE_LINK_SPEED_SUPPORT_GEN2 |
                                                           CAIL_PCIE_LINK_SPEED_SUPPORT_GEN3);
                        else if (platform_speed_cap == PCIE_SPEED_5_0GT)
                                adev->pm.pcie_gen_mask |= (CAIL_PCIE_LINK_SPEED_SUPPORT_GEN1 |
                                                           CAIL_PCIE_LINK_SPEED_SUPPORT_GEN2);
                        else
                                adev->pm.pcie_gen_mask |= CAIL_PCIE_LINK_SPEED_SUPPORT_GEN1;

                }
        }
        if (adev->pm.pcie_mlw_mask == 0) {
                if (platform_link_width == PCIE_LNK_WIDTH_UNKNOWN) {
                        adev->pm.pcie_mlw_mask |= AMDGPU_DEFAULT_PCIE_MLW_MASK;
                } else {
                        switch (platform_link_width) {
                        case PCIE_LNK_X32:
                                adev->pm.pcie_mlw_mask = (CAIL_PCIE_LINK_WIDTH_SUPPORT_X32 |
                                                          CAIL_PCIE_LINK_WIDTH_SUPPORT_X16 |
                                                          CAIL_PCIE_LINK_WIDTH_SUPPORT_X12 |
                                                          CAIL_PCIE_LINK_WIDTH_SUPPORT_X8 |
                                                          CAIL_PCIE_LINK_WIDTH_SUPPORT_X4 |
                                                          CAIL_PCIE_LINK_WIDTH_SUPPORT_X2 |
                                                          CAIL_PCIE_LINK_WIDTH_SUPPORT_X1);
                                break;
                        case PCIE_LNK_X16:
                                adev->pm.pcie_mlw_mask = (CAIL_PCIE_LINK_WIDTH_SUPPORT_X16 |
                                                          CAIL_PCIE_LINK_WIDTH_SUPPORT_X12 |
                                                          CAIL_PCIE_LINK_WIDTH_SUPPORT_X8 |
                                                          CAIL_PCIE_LINK_WIDTH_SUPPORT_X4 |
                                                          CAIL_PCIE_LINK_WIDTH_SUPPORT_X2 |
                                                          CAIL_PCIE_LINK_WIDTH_SUPPORT_X1);
                                break;
                        case PCIE_LNK_X12:
                                adev->pm.pcie_mlw_mask = (CAIL_PCIE_LINK_WIDTH_SUPPORT_X12 |
                                                          CAIL_PCIE_LINK_WIDTH_SUPPORT_X8 |
                                                          CAIL_PCIE_LINK_WIDTH_SUPPORT_X4 |
                                                          CAIL_PCIE_LINK_WIDTH_SUPPORT_X2 |
                                                          CAIL_PCIE_LINK_WIDTH_SUPPORT_X1);
                                break;
                        case PCIE_LNK_X8:
                                adev->pm.pcie_mlw_mask = (CAIL_PCIE_LINK_WIDTH_SUPPORT_X8 |
                                                          CAIL_PCIE_LINK_WIDTH_SUPPORT_X4 |
                                                          CAIL_PCIE_LINK_WIDTH_SUPPORT_X2 |
                                                          CAIL_PCIE_LINK_WIDTH_SUPPORT_X1);
                                break;
                        case PCIE_LNK_X4:
                                adev->pm.pcie_mlw_mask = (CAIL_PCIE_LINK_WIDTH_SUPPORT_X4 |
                                                          CAIL_PCIE_LINK_WIDTH_SUPPORT_X2 |
                                                          CAIL_PCIE_LINK_WIDTH_SUPPORT_X1);
                                break;
                        case PCIE_LNK_X2:
                                adev->pm.pcie_mlw_mask = (CAIL_PCIE_LINK_WIDTH_SUPPORT_X2 |
                                                          CAIL_PCIE_LINK_WIDTH_SUPPORT_X1);
                                break;
                        case PCIE_LNK_X1:
                                adev->pm.pcie_mlw_mask = CAIL_PCIE_LINK_WIDTH_SUPPORT_X1;
                                break;
                        default:
                                break;
                        }
                }
        }
}

int amdgpu_device_baco_enter(struct drm_device *dev)
{
        struct amdgpu_device *adev = drm_to_adev(dev);
        struct amdgpu_ras *ras = amdgpu_ras_get_context(adev);

        if (!amdgpu_device_supports_baco(adev_to_drm(adev)))
                return -ENOTSUPP;

        if (ras && ras->supported)
                adev->nbio.funcs->enable_doorbell_interrupt(adev, false);

        return amdgpu_dpm_baco_enter(adev);
}

int amdgpu_device_baco_exit(struct drm_device *dev)
{
        struct amdgpu_device *adev = drm_to_adev(dev);
        struct amdgpu_ras *ras = amdgpu_ras_get_context(adev);
        int ret = 0;

        if (!amdgpu_device_supports_baco(adev_to_drm(adev)))
                return -ENOTSUPP;

        ret = amdgpu_dpm_baco_exit(adev);
        if (ret)
                return ret;

        if (ras && ras->supported)
                adev->nbio.funcs->enable_doorbell_interrupt(adev, true);

        return 0;
}

static void amdgpu_cancel_all_tdr(struct amdgpu_device *adev)
{
        int i;

        for (i = 0; i < AMDGPU_MAX_RINGS; ++i) {
                struct amdgpu_ring *ring = adev->rings[i];

                if (!ring || !ring->sched.thread)
                        continue;

                cancel_delayed_work_sync(&ring->sched.work_tdr);
        }
}

/**
 * amdgpu_pci_error_detected - Called when a PCI error is detected.
 * @pdev: PCI device struct
 * @state: PCI channel state
 *
 * Description: Called when a PCI error is detected.
 *
 * Return: PCI_ERS_RESULT_NEED_RESET or PCI_ERS_RESULT_DISCONNECT.
 */
pci_ers_result_t amdgpu_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
{
        struct drm_device *dev = pci_get_drvdata(pdev);
        struct amdgpu_device *adev = drm_to_adev(dev);
        int i;

        DRM_INFO("PCI error: detected callback, state(%d)!!\n", state);

        if (adev->gmc.xgmi.num_physical_nodes > 1) {
                DRM_WARN("No support for XGMI hive yet...");
                return PCI_ERS_RESULT_DISCONNECT;
        }

        switch (state) {
        case pci_channel_io_normal:
                return PCI_ERS_RESULT_CAN_RECOVER;
        /* Fatal error, prepare for slot reset */
        case pci_channel_io_frozen:             
                /*              
                 * Cancel and wait for all TDRs in progress if failing to
                 * set  adev->in_gpu_reset in amdgpu_device_lock_adev
                 *
                 * Locking adev->reset_sem will prevent any external access
                 * to GPU during PCI error recovery
                 */
                while (!amdgpu_device_lock_adev(adev, NULL))
                        amdgpu_cancel_all_tdr(adev);

                /*
                 * Block any work scheduling as we do for regular GPU reset
                 * for the duration of the recovery
                 */
                for (i = 0; i < AMDGPU_MAX_RINGS; ++i) {
                        struct amdgpu_ring *ring = adev->rings[i];

                        if (!ring || !ring->sched.thread)
                                continue;

                        drm_sched_stop(&ring->sched, NULL);
                }
                return PCI_ERS_RESULT_NEED_RESET;
        case pci_channel_io_perm_failure:
                /* Permanent error, prepare for device removal */
                return PCI_ERS_RESULT_DISCONNECT;
        }

        return PCI_ERS_RESULT_NEED_RESET;
}

/**
 * amdgpu_pci_mmio_enabled - Enable MMIO and dump debug registers
 * @pdev: pointer to PCI device
 */
pci_ers_result_t amdgpu_pci_mmio_enabled(struct pci_dev *pdev)
{

        DRM_INFO("PCI error: mmio enabled callback!!\n");

        /* TODO - dump whatever for debugging purposes */

        /* This called only if amdgpu_pci_error_detected returns
         * PCI_ERS_RESULT_CAN_RECOVER. Read/write to the device still
         * works, no need to reset slot.
         */

        return PCI_ERS_RESULT_RECOVERED;
}

/**
 * amdgpu_pci_slot_reset - Called when PCI slot has been reset.
 * @pdev: PCI device struct
 *
 * Description: This routine is called by the pci error recovery
 * code after the PCI slot has been reset, just before we
 * should resume normal operations.
 */
pci_ers_result_t amdgpu_pci_slot_reset(struct pci_dev *pdev)
{
        struct drm_device *dev = pci_get_drvdata(pdev);
        struct amdgpu_device *adev = drm_to_adev(dev);
        int r, i;
        bool need_full_reset = true;
        u32 memsize;
        struct list_head device_list;

        DRM_INFO("PCI error: slot reset callback!!\n");

        INIT_LIST_HEAD(&device_list);
        list_add_tail(&adev->gmc.xgmi.head, &device_list);

        /* wait for asic to come out of reset */
        msleep(500);

        /* Restore PCI confspace */
        amdgpu_device_load_pci_state(pdev);

        /* confirm  ASIC came out of reset */
        for (i = 0; i < adev->usec_timeout; i++) {
                memsize = amdgpu_asic_get_config_memsize(adev);

                if (memsize != 0xffffffff)
                        break;
                udelay(1);
        }
        if (memsize == 0xffffffff) {
                r = -ETIME;
                goto out;
        }

        adev->in_pci_err_recovery = true;       
        r = amdgpu_device_pre_asic_reset(adev, NULL, &need_full_reset);
        adev->in_pci_err_recovery = false;
        if (r)
                goto out;

        r = amdgpu_do_asic_reset(NULL, &device_list, &need_full_reset, true);

out:
        if (!r) {
                if (amdgpu_device_cache_pci_state(adev->pdev))
                        pci_restore_state(adev->pdev);

                DRM_INFO("PCIe error recovery succeeded\n");
        } else {
                DRM_ERROR("PCIe error recovery failed, err:%d", r);
                amdgpu_device_unlock_adev(adev);
        }

        return r ? PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_RECOVERED;
}

/**
 * amdgpu_pci_resume() - resume normal ops after PCI reset
 * @pdev: pointer to PCI device
 *
 * Called when the error recovery driver tells us that its
 * OK to resume normal operation. Use completion to allow
 * halted scsi ops to resume.
 */
void amdgpu_pci_resume(struct pci_dev *pdev)
{
        struct drm_device *dev = pci_get_drvdata(pdev);
        struct amdgpu_device *adev = drm_to_adev(dev);
        int i;


        DRM_INFO("PCI error: resume callback!!\n");

        for (i = 0; i < AMDGPU_MAX_RINGS; ++i) {
                struct amdgpu_ring *ring = adev->rings[i];

                if (!ring || !ring->sched.thread)
                        continue;


                drm_sched_resubmit_jobs(&ring->sched);
                drm_sched_start(&ring->sched, true);
        }

        amdgpu_device_unlock_adev(adev);
}

bool amdgpu_device_cache_pci_state(struct pci_dev *pdev)
{
        struct drm_device *dev = pci_get_drvdata(pdev);
        struct amdgpu_device *adev = drm_to_adev(dev);
        int r;

        r = pci_save_state(pdev);
        if (!r) {
                kfree(adev->pci_state);

                adev->pci_state = pci_store_saved_state(pdev);

                if (!adev->pci_state) {
                        DRM_ERROR("Failed to store PCI saved state");
                        return false;
                }
        } else {
                DRM_WARN("Failed to save PCI state, err:%d\n", r);
                return false;
        }

        return true;
}

bool amdgpu_device_load_pci_state(struct pci_dev *pdev)
{
        struct drm_device *dev = pci_get_drvdata(pdev);
        struct amdgpu_device *adev = drm_to_adev(dev);
        int r;

        if (!adev->pci_state)
                return false;

        r = pci_load_saved_state(pdev, adev->pci_state);

        if (!r) {
                pci_restore_state(pdev);
        } else {
                DRM_WARN("Failed to load PCI state, err:%d\n", r);
                return false;
        }

        return true;
}