Merge tag 'amd-drm-next-6.3-2023-01-27' of https://gitlab.freedesktop.org/agd5f/linux...

[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 <linux/iommu.h>
#include <linux/pci.h>
#include <linux/devcoredump.h>
#include <generated/utsrelease.h>
#include <linux/pci-p2pdma.h>

#include <drm/drm_aperture.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fb_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/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 "amdgpu_reset.h"

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

#include <drm/drm_drv.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/navi12_gpu_info.bin");

#define AMDGPU_RESUME_MS                2000
#define AMDGPU_MAX_RETRY_LIMIT          2
#define AMDGPU_RETRY_SRIOV_RESET(r) ((r) == -EBUSY || (r) == -ETIMEDOUT || (r) == -EINVAL)

static const struct drm_driver amdgpu_kms_driver;

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",
        "ALDEBARAN",
        "NAVI10",
        "CYAN_SKILLFISH",
        "NAVI14",
        "NAVI12",
        "SIENNA_CICHLID",
        "NAVY_FLOUNDER",
        "VANGOGH",
        "DIMGREY_CAVEFISH",
        "BEIGE_GOBY",
        "YELLOW_CARP",
        "IP DISCOVERY",
        "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 sysfs_emit(buf, "%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 sysfs_emit(buf, "%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 sysfs_emit(buf, "%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 sysfs_emit(buf, "%s\n", adev->serial);
}

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

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

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

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

        if (adev->has_pr3 ||
            ((adev->flags & AMD_IS_PX) && amdgpu_is_atpx_hybrid()))
                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);
}

/**
 * amdgpu_device_supports_smart_shift - Is the device dGPU with
 * smart shift support
 *
 * @dev: drm_device pointer
 *
 * Returns true if the device is a dGPU with Smart Shift support,
 * otherwise returns false.
 */
bool amdgpu_device_supports_smart_shift(struct drm_device *dev)
{
        return (amdgpu_device_supports_boco(dev) &&
                amdgpu_acpi_is_power_shift_control_supported());
}

/*
 * VRAM access helper functions
 */

/**
 * amdgpu_device_mm_access - access vram by MM_INDEX/MM_DATA
 *
 * @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_mm_access(struct amdgpu_device *adev, loff_t pos,
                             void *buf, size_t size, bool write)
{
        unsigned long flags;
        uint32_t hi = ~0, tmp = 0;
        uint32_t *data = buf;
        uint64_t last;
        int idx;

        if (!drm_dev_enter(adev_to_drm(adev), &idx))
                return;

        BUG_ON(!IS_ALIGNED(pos, 4) || !IS_ALIGNED(size, 4));

        spin_lock_irqsave(&adev->mmio_idx_lock, flags);
        for (last = pos + size; pos < last; pos += 4) {
                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, *data++);
                else
                        *data++ = RREG32_NO_KIQ(mmMM_DATA);
        }

        spin_unlock_irqrestore(&adev->mmio_idx_lock, flags);
        drm_dev_exit(idx);
}

/**
 * amdgpu_device_aper_access - access vram by vram aperature
 *
 * @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
 *
 * The return value means how many bytes have been transferred.
 */
size_t amdgpu_device_aper_access(struct amdgpu_device *adev, loff_t pos,
                                 void *buf, size_t size, bool write)
{
#ifdef CONFIG_64BIT
        void __iomem *addr;
        size_t count = 0;
        uint64_t last;

        if (!adev->mman.aper_base_kaddr)
                return 0;

        last = min(pos + size, adev->gmc.visible_vram_size);
        if (last > pos) {
                addr = adev->mman.aper_base_kaddr + pos;
                count = last - pos;

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

        }

        return count;
#else
        return 0;
#endif
}

/**
 * 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,
                               void *buf, size_t size, bool write)
{
        size_t count;

        /* try to using vram apreature to access vram first */
        count = amdgpu_device_aper_access(adev, pos, buf, size, write);
        size -= count;
        if (size) {
                /* using MM to access rest vram */
                pos += count;
                buf += count;
                amdgpu_device_mm_access(adev, pos, buf, size, write);
        }
}

/*
 * register access helper functions.
 */

/* Check if hw access should be skipped because of hotplug or device error */
bool amdgpu_device_skip_hw_access(struct amdgpu_device *adev)
{
        if (adev->no_hw_access)
                return true;

#ifdef CONFIG_LOCKDEP
        /*
         * This is a bit complicated to understand, so worth a comment. What we assert
         * here is that the GPU reset is not running on another thread in parallel.
         *
         * For this we trylock the read side of the reset semaphore, if that succeeds
         * we know that the reset is not running in paralell.
         *
         * If the trylock fails we assert that we are either already holding the read
         * side of the lock or are the reset thread itself and hold the write side of
         * the lock.
         */
        if (in_task()) {
                if (down_read_trylock(&adev->reset_domain->sem))
                        up_read(&adev->reset_domain->sem);
                else
                        lockdep_assert_held(&adev->reset_domain->sem);
        }
#endif
        return false;
}

/**
 * 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 (amdgpu_device_skip_hw_access(adev))
                return 0;

        if ((reg * 4) < adev->rmmio_size) {
                if (!(acc_flags & AMDGPU_REGS_NO_KIQ) &&
                    amdgpu_sriov_runtime(adev) &&
                    down_read_trylock(&adev->reset_domain->sem)) {
                        ret = amdgpu_kiq_rreg(adev, reg);
                        up_read(&adev->reset_domain->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 (amdgpu_device_skip_hw_access(adev))
                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 (amdgpu_device_skip_hw_access(adev))
                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 (amdgpu_device_skip_hw_access(adev))
                return;

        if ((reg * 4) < adev->rmmio_size) {
                if (!(acc_flags & AMDGPU_REGS_NO_KIQ) &&
                    amdgpu_sriov_runtime(adev) &&
                    down_read_trylock(&adev->reset_domain->sem)) {
                        amdgpu_kiq_wreg(adev, reg, v);
                        up_read(&adev->reset_domain->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 direct/indirect mmio or with RLC path if in range
 *
 * @adev: amdgpu_device pointer
 * @reg: mmio/rlc register
 * @v: value to write
 *
 * this function is invoked only for the debugfs register access
 */
void amdgpu_mm_wreg_mmio_rlc(struct amdgpu_device *adev,
                             uint32_t reg, uint32_t v)
{
        if (amdgpu_device_skip_hw_access(adev))
                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 amdgpu_sriov_wreg(adev, reg, v, 0, 0);
        } else if ((reg * 4) >= adev->rmmio_size) {
                adev->pcie_wreg(adev, reg * 4, v);
        } else {
                writel(v, ((void __iomem *)adev->rmmio) + (reg * 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 (amdgpu_device_skip_hw_access(adev))
                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 (amdgpu_device_skip_hw_access(adev))
                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 (amdgpu_device_skip_hw_access(adev))
                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 (amdgpu_device_skip_hw_access(adev))
                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
 * @reg_addr: indirect register address to read from
 *
 * 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
 * @reg_addr: indirect register address to read from
 *
 * 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);

        if (adev->ip_versions[GC_HWIP][0] >= IP_VERSION(11, 0, 0))
                return amdgpu_atomfirmware_asic_init(adev, true);
        else
                return amdgpu_atom_asic_init(adev->mode_info.atom_context);
}

/**
 * amdgpu_device_mem_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_mem_scratch_init(struct amdgpu_device *adev)
{
        return amdgpu_bo_create_kernel(adev, AMDGPU_GPU_PAGE_SIZE, PAGE_SIZE,
                                       AMDGPU_GEM_DOMAIN_VRAM |
                                       AMDGPU_GEM_DOMAIN_GTT,
                                       &adev->mem_scratch.robj,
                                       &adev->mem_scratch.gpu_addr,
                                       (void **)&adev->mem_scratch.ptr);
}

/**
 * amdgpu_device_mem_scratch_fini - Free the VRAM scratch page
 *
 * @adev: amdgpu_device pointer
 *
 * Frees the VRAM scratch page.
 */
static void amdgpu_device_mem_scratch_fini(struct amdgpu_device *adev)
{
        amdgpu_bo_free_kernel(&adev->mem_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);
}

/**
 * amdgpu_device_pci_reset - reset the GPU using generic PCI means
 *
 * @adev: amdgpu_device pointer
 *
 * Resets the GPU using generic pci reset interfaces (FLR, SBR, etc.).
 */
int amdgpu_device_pci_reset(struct amdgpu_device *adev)
{
        return pci_reset_function(adev->pdev);
}

/*
 * 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);

        if (adev->enable_mes) {
                adev->doorbell.num_doorbells =
                        adev->doorbell.size / sizeof(u32);
        } else {
                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)
{
        int rbar_size = pci_rebar_bytes_to_size(adev->gmc.real_vram_size);
        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;

        /* Limit the BAR size to what is available */
        rbar_size = min(fls(pci_rebar_get_possible_sizes(adev->pdev, 0)) - 1,
                        rbar_size);

        /* 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;
                }
        }

        /* Don't post if we need to reset whole hive on init */
        if (adev->gmc.xgmi.pending_reset)
                return false;

        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;
}

/**
 * amdgpu_device_should_use_aspm - check if the device should program ASPM
 *
 * @adev: amdgpu_device pointer
 *
 * Confirm whether the module parameter and pcie bridge agree that ASPM should
 * be set for this device.
 *
 * Returns true if it should be used or false if not.
 */
bool amdgpu_device_should_use_aspm(struct amdgpu_device *adev)
{
        switch (amdgpu_aspm) {
        case -1:
                break;
        case 0:
                return false;
        case 1:
                return true;
        default:
                return false;
        }
        return pcie_aspm_enabled(adev->pdev);
}

/* if we get transitioned to only one device, take VGA back */
/**
 * amdgpu_device_vga_set_decode - enable/disable vga decode
 *
 * @pdev: PCI 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(struct pci_dev *pdev,
                bool state)
{
        struct amdgpu_device *adev = drm_to_adev(pci_get_drvdata(pdev));
        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;
}

static int amdgpu_device_init_apu_flags(struct amdgpu_device *adev)
{
        if (!(adev->flags & AMD_IS_APU) ||
            adev->asic_type < CHIP_RAVEN)
                return 0;

        switch (adev->asic_type) {
        case CHIP_RAVEN:
                if (adev->pdev->device == 0x15dd)
                        adev->apu_flags |= AMD_APU_IS_RAVEN;
                if (adev->pdev->device == 0x15d8)
                        adev->apu_flags |= AMD_APU_IS_PICASSO;
                break;
        case CHIP_RENOIR:
                if ((adev->pdev->device == 0x1636) ||
                    (adev->pdev->device == 0x164c))
                        adev->apu_flags |= AMD_APU_IS_RENOIR;
                else
                        adev->apu_flags |= AMD_APU_IS_GREEN_SARDINE;
                break;
        case CHIP_VANGOGH:
                adev->apu_flags |= AMD_APU_IS_VANGOGH;
                break;
        case CHIP_YELLOW_CARP:
                break;
        case CHIP_CYAN_SKILLFISH:
                if ((adev->pdev->device == 0x13FE) ||
                    (adev->pdev->device == 0x143F))
                        adev->apu_flags |= AMD_APU_IS_CYAN_SKILLFISH2;
                break;
        default:
                break;
        }

        return 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);
        }

        if (amdgpu_reset_method < -1 || amdgpu_reset_method > 4) {
                dev_warn(adev->dev, "invalid option for reset method, reverting to default\n");
                amdgpu_reset_method = -1;
        }

        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);

        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 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_px(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(pdev, PCI_D0);
                amdgpu_device_load_pci_state(pdev);
                r = pci_enable_device(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;
        } else {
                pr_info("switched off\n");
                dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
                amdgpu_device_suspend(dev, true);
                amdgpu_device_cache_pci_state(pdev);
                /* Shut down the device */
                pci_disable_device(pdev);
                pci_set_power_state(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,
                                            u64 *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;

        switch (ip_block_version->type) {
        case AMD_IP_BLOCK_TYPE_VCN:
                if (adev->harvest_ip_mask & AMD_HARVEST_IP_VCN_MASK)
                        return 0;
                break;
        case AMD_IP_BLOCK_TYPE_JPEG:
                if (adev->harvest_ip_mask & AMD_HARVEST_IP_JPEG_MASK)
                        return 0;
                break;
        default:
                break;
        }

        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) {
                const char *pci_address_name = pci_name(adev->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);
        }
}

void amdgpu_device_set_sriov_virtual_display(struct amdgpu_device *adev)
{
        if (amdgpu_sriov_vf(adev) && !adev->enable_virtual_display) {
                adev->mode_info.num_crtc = 1;
                adev->enable_virtual_display = true;
                DRM_INFO("virtual_display:%d, num_crtc:%d\n",
                         adev->enable_virtual_display, adev->mode_info.num_crtc);
        }
}

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

        switch (adev->asic_type) {
        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_NAVI12:
                chip_name = "navi12";
                break;
        }

        snprintf(fw_name, sizeof(fw_name), "amdgpu/%s_gpu_info.bin", chip_name);
        err = amdgpu_ucode_request(adev, &adev->firmware.gpu_info_fw, fw_name);
        if (err) {
                dev_err(adev->dev,
                        "Failed to get 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)
{
        struct drm_device *dev = adev_to_drm(adev);
        struct pci_dev *parent;
        int i, r;
        bool total;

        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;
        default:
                r = amdgpu_discovery_set_ip_blocks(adev);
                if (r)
                        return r;
                break;
        }

        if (amdgpu_has_atpx() &&
            (amdgpu_is_atpx_hybrid() ||
             amdgpu_has_atpx_dgpu_power_cntl()) &&
            ((adev->flags & AMD_IS_APU) == 0) &&
            !pci_is_thunderbolt_attached(to_pci_dev(dev->dev)))
                adev->flags |= AMD_IS_PX;

        if (!(adev->flags & AMD_IS_APU)) {
                parent = pci_upstream_bridge(adev->pdev);
                adev->has_pr3 = parent ? pci_pr3_present(parent) : false;
        }

        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;
        if (amdgpu_sriov_vf(adev) && adev->asic_type == CHIP_SIENNA_CICHLID)
                adev->pm.pp_feature &= ~PP_OVERDRIVE_MASK;

        total = true;
        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);
                                        total = false;
                                } 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;
                        }

                        /*get pf2vf msg info at it's earliest time*/
                        if (amdgpu_sriov_vf(adev))
                                amdgpu_virt_init_data_exchange(adev);

                }
        }
        if (!total)
                return -ENODEV;

        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;

                        if (!adev->ip_blocks[i].status.sw)
                                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;
}

static int amdgpu_device_init_schedulers(struct amdgpu_device *adev)
{
        long timeout;
        int r, i;

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

                /* No need to setup the GPU scheduler for rings that don't need it */
                if (!ring || ring->no_scheduler)
                        continue;

                switch (ring->funcs->type) {
                case AMDGPU_RING_TYPE_GFX:
                        timeout = adev->gfx_timeout;
                        break;
                case AMDGPU_RING_TYPE_COMPUTE:
                        timeout = adev->compute_timeout;
                        break;
                case AMDGPU_RING_TYPE_SDMA:
                        timeout = adev->sdma_timeout;
                        break;
                default:
                        timeout = adev->video_timeout;
                        break;
                }

                r = drm_sched_init(&ring->sched, &amdgpu_sched_ops,
                                   ring->num_hw_submission, amdgpu_job_hang_limit,
                                   timeout, adev->reset_domain->wq,
                                   ring->sched_score, ring->name,
                                   adev->dev);
                if (r) {
                        DRM_ERROR("Failed to create scheduler on ring %s.\n",
                                  ring->name);
                        return r;
                }
        }

        return 0;
}


/**
 * 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;

                if (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_COMMON) {
                        /* need to do common hw init early so everything is set up for gmc */
                        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;
                        }
                        adev->ip_blocks[i].status.hw = true;
                } else if (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_GMC) {
                        /* need to do gmc hw init early so we can allocate gpu mem */
                        /* Try to reserve bad pages early */
                        if (amdgpu_sriov_vf(adev))
                                amdgpu_virt_exchange_data(adev);

                        r = amdgpu_device_mem_scratch_init(adev);
                        if (r) {
                                DRM_ERROR("amdgpu_mem_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) {
                                r = amdgpu_allocate_static_csa(adev, &adev->virt.csa_obj,
                                                               AMDGPU_GEM_DOMAIN_VRAM |
                                                               AMDGPU_GEM_DOMAIN_GTT,
                                                               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;

        /**
         * In case of XGMI grab extra reference for reset domain for this device
         */
        if (adev->gmc.xgmi.num_physical_nodes > 1) {
                if (amdgpu_xgmi_add_device(adev) == 0) {
                        if (!amdgpu_sriov_vf(adev)) {
                                struct amdgpu_hive_info *hive = amdgpu_get_xgmi_hive(adev);

                                if (WARN_ON(!hive)) {
                                        r = -ENOENT;
                                        goto init_failed;
                                }

                                if (!hive->reset_domain ||
                                    !amdgpu_reset_get_reset_domain(hive->reset_domain)) {
                                        r = -ENOENT;
                                        amdgpu_put_xgmi_hive(hive);
                                        goto init_failed;
                                }

                                /* Drop the early temporary reset domain we created for device */
                                amdgpu_reset_put_reset_domain(adev->reset_domain);
                                adev->reset_domain = hive->reset_domain;
                                amdgpu_put_xgmi_hive(hive);
                        }
                }
        }

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

        /* Don't init kfd if whole hive need to be reset during init */
        if (!adev->gmc.xgmi.pending_reset)
                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.
 */

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 GFX, SDMA on S0ix */
                if (adev->in_s0ix &&
                    (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_GFX ||
                     adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_SDMA))
                        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;
}

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 PG for GFX, SDMA on S0ix */
                if (adev->in_s0ix &&
                    (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_GFX ||
                     adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_SDMA))
                        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;
        }

        r = amdgpu_ras_late_init(adev);
        if (r) {
                DRM_ERROR("amdgpu_ras_late_init failed %d", r);
                return r;
        }

        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);

        /* For passthrough configuration on arcturus and aldebaran, enable special handling SBR */
        if (amdgpu_passthrough(adev) && ((adev->asic_type == CHIP_ARCTURUS && adev->gmc.xgmi.num_physical_nodes > 1)||
                               adev->asic_type == CHIP_ALDEBARAN ))
                amdgpu_dpm_handle_passthrough_sbr(adev, true);

        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_smu_fini_early - smu hw_fini wrapper
 *
 * @adev: amdgpu_device pointer
 *
 * For ASICs need to disable SMC first
 */
static void amdgpu_device_smu_fini_early(struct amdgpu_device *adev)
{
        int i, r;

        if (adev->ip_versions[GC_HWIP][0] > IP_VERSION(9, 0, 0))
                return;

        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;
                }
        }
}

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

        for (i = 0; i < adev->num_ip_blocks; i++) {
                if (!adev->ip_blocks[i].version->funcs->early_fini)
                        continue;

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

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

        amdgpu_amdkfd_suspend(adev, false);

        /* Workaroud for ASICs need to disable SMC first */
        amdgpu_device_smu_fini_early(adev);

        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;
        }

        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_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);

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

        amdgpu_amdkfd_device_fini_sw(adev);

        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_mem_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);

        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);

        WARN_ON_ONCE(adev->gfx.gfx_off_state);
        WARN_ON_ONCE(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;
}

/**
 * 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);

        /*
         * Per PMFW team's suggestion, driver needs to handle gfxoff
         * and df cstate features disablement for gpu reset(e.g. Mode1Reset)
         * scenario. Add the missing df cstate disablement here.
         */
        if (amdgpu_dpm_set_df_cstate(adev, DF_CSTATE_DISALLOW))
                dev_warn(adev->dev, "Failed to disallow df cstate");

        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;

        if (adev->in_s0ix)
                amdgpu_dpm_gfx_state_change(adev, sGpuChangeState_D3Entry);

        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;
                }

                /* skip unnecessary suspend if we do not initialize them yet */
                if (adev->gmc.xgmi.pending_reset &&
                    !(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_COMMON ||
                      adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_IH)) {
                        adev->ip_blocks[i].status.hw = false;
                        continue;
                }

                /* skip suspend of gfx/mes and psp for S0ix
                 * gfx is in gfxoff state, so on resume it will exit gfxoff just
                 * like at runtime. PSP is also part of the always on hardware
                 * so no need to suspend it.
                 */
                if (adev->in_s0ix &&
                    (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_PSP ||
                     adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_GFX ||
                     adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_MES))
                        continue;

                /* SDMA 5.x+ is part of GFX power domain so it's covered by GFXOFF */
                if (adev->in_s0ix &&
                    (adev->ip_versions[SDMA0_HWIP][0] >= IP_VERSION(5, 0, 0)) &&
                    (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_SDMA))
                        continue;

                /* Once swPSP provides the IMU, RLC FW binaries to TOS during cold-boot.
                 * These are in TMR, hence are expected to be reused by PSP-TOS to reload
                 * from this location and RLC Autoload automatically also gets loaded
                 * from here based on PMFW -> PSP message during re-init sequence.
                 * Therefore, the psp suspend & resume should be skipped to avoid destroy
                 * the TMR and reload FWs again for IMU enabled APU ASICs.
                 */
                if (amdgpu_in_reset(adev) &&
                    (adev->flags & AMD_IS_APU) && adev->gfx.imu.funcs &&
                    adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_PSP)
                        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;
                                }
                        }
                }
        }

        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_fini_data_exchange(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_COMMON,
                AMD_IP_BLOCK_TYPE_GMC,
                AMD_IP_BLOCK_TYPE_PSP,
                AMD_IP_BLOCK_TYPE_IH,
        };

        for (i = 0; i < adev->num_ip_blocks; 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 ||
                    (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_PSP && amdgpu_sriov_vf(adev))) {

                        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_amdkfd_resume_iommu(adev);
        if (r)
                return 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_virtualization_supported(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) {
#ifdef CONFIG_DRM_AMDGPU_SI
        case CHIP_HAINAN:
#endif
        case CHIP_TOPAZ:
                /* chips with no display hardware */
                return false;
#if defined(CONFIG_DRM_AMD_DC)
        case CHIP_TAHITI:
        case CHIP_PITCAIRN:
        case CHIP_VERDE:
        case CHIP_OLAND:
                /*
                 * 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.
                 */
#if defined(CONFIG_DRM_AMD_DC_SI)
                return amdgpu_dc > 0;
#else
                return false;
#endif
        case CHIP_BONAIRE:
        case CHIP_KAVERI:
        case CHIP_KABINI:
        case CHIP_MULLINS:
                /*
                 * We have systems in the wild with these ASICs that require
                 * 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;
        default:
                return amdgpu_dc != 0;
#else
        default:
                if (amdgpu_dc > 0)
                        DRM_INFO_ONCE("Display Core has been requested via kernel parameter "
                                         "but isn't supported by ASIC, ignoring\n");
                return false;
#endif
        }
}

/**
 * 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 (adev->enable_virtual_display ||
            (adev->harvest_ip_mask & AMD_HARVEST_IP_DMU_MASK))
                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.ras && adev->mmhub.ras->ras_block.hw_ops &&
                    adev->mmhub.ras->ras_block.hw_ops->reset_ras_error_count)
                        adev->mmhub.ras->ras_block.hw_ops->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 60000 for 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))
                adev->compute_timeout = amdgpu_sriov_is_pp_one_vf(adev) ?
                                        msecs_to_jiffies(60000) : msecs_to_jiffies(10000);
        else
                adev->compute_timeout =  msecs_to_jiffies(60000);

        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;
                                dev_warn(adev->dev, "lockup timeout disabled");
                                add_taint(TAINT_SOFTLOCKUP, LOCKDEP_STILL_OK);
                        } 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;
}

/**
 * amdgpu_device_check_iommu_direct_map - check if RAM direct mapped to GPU
 *
 * @adev: amdgpu_device pointer
 *
 * RAM direct mapped to GPU if IOMMU is not enabled or is pass through mode
 */
static void amdgpu_device_check_iommu_direct_map(struct amdgpu_device *adev)
{
        struct iommu_domain *domain;

        domain = iommu_get_domain_for_dev(adev->dev);
        if (!domain || domain->type == IOMMU_DOMAIN_IDENTITY)
                adev->ram_is_direct_mapped = true;
}

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 px = 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;
        RCU_INIT_POINTER(adev->gang_submit, dma_fence_get_stub());
        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->harvest_ip_mask = 0x0;
        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 */
        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);
        mutex_init(&adev->psp.mutex);
        mutex_init(&adev->notifier_lock);
        mutex_init(&adev->pm.stable_pstate_ctx_lock);
        mutex_init(&adev->benchmark_mutex);

        amdgpu_device_init_apu_flags(adev);

        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_LIST_HEAD(&adev->reset_list);

        INIT_LIST_HEAD(&adev->ras_list);

        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->gfx.gfx_off_residency = 0;
        adev->gfx.gfx_off_entrycount = 0;
        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);
        }

        for (i = 0; i < AMD_IP_BLOCK_TYPE_NUM; i++)
                atomic_set(&adev->pm.pwr_state[i], POWER_STATE_UNKNOWN);

        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);

        amdgpu_device_get_pcie_info(adev);

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

        /*
         * Reset domain needs to be present early, before XGMI hive discovered
         * (if any) and intitialized to use reset sem and in_gpu reset flag
         * early on during init and before calling to RREG32.
         */
        adev->reset_domain = amdgpu_reset_create_reset_domain(SINGLE_DEVICE, "amdgpu-reset-dev");
        if (!adev->reset_domain)
                return -ENOMEM;

        /* 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");
                return r;
        }

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

        /* Get rid of things like offb */
        r = drm_aperture_remove_conflicting_pci_framebuffers(adev->pdev, &amdgpu_kms_driver);
        if (r)
                return r;

        /* Enable TMZ based on IP_VERSION */
        amdgpu_gmc_tmz_set(adev);

        amdgpu_gmc_noretry_set(adev);
        /* Need to get xgmi info early to decide the reset behavior*/
        if (adev->gmc.xgmi.supported) {
                r = adev->gfxhub.funcs->get_xgmi_info(adev);
                if (r)
                        return r;
        }

        /* enable PCIE atomic ops */
        if (amdgpu_sriov_vf(adev))
                adev->have_atomics_support = ((struct amd_sriov_msg_pf2vf_info *)
                        adev->virt.fw_reserve.p_pf2vf)->pcie_atomic_ops_support_flags ==
                        (PCI_EXP_DEVCAP2_ATOMIC_COMP32 | PCI_EXP_DEVCAP2_ATOMIC_COMP64);
        else
                adev->have_atomics_support =
                        !pci_enable_atomic_ops_to_root(adev->pdev,
                                          PCI_EXP_DEVCAP2_ATOMIC_COMP32 |
                                          PCI_EXP_DEVCAP2_ATOMIC_COMP64);
        if (!adev->have_atomics_support)
                dev_info(adev->dev, "PCIE atomic ops is not supported\n");

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

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

        amdgpu_reset_init(adev);

        /* 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)) {
                if (adev->gmc.xgmi.num_physical_nodes) {
                        dev_info(adev->dev, "Pending hive reset.\n");
                        adev->gmc.xgmi.pending_reset = true;
                        /* Only need to init necessary block for SMU to handle the reset */
                        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_COMMON ||
                                      adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_IH ||
                                      adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_SMC)) {
                                        DRM_DEBUG("IP %s disabled for hw_init.\n",
                                                adev->ip_blocks[i].version->funcs->name);
                                        adev->ip_blocks[i].status.hw = true;
                                }
                        }
                } else {
                        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->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_sw_init(adev);
        if (r) {
                dev_err(adev->dev, "amdgpu_fence_driver_sw_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 release_ras_con;
                }
                dev_err(adev->dev, "amdgpu_device_ip_init failed\n");
                amdgpu_vf_error_put(adev, AMDGIM_ERROR_VF_AMDGPU_INIT_FAIL, 0, 0);
                goto release_ras_con;
        }

        amdgpu_fence_driver_hw_init(adev);

        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));

        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;

        r = amdgpu_psp_sysfs_init(adev);
        if (r) {
                adev->psp_sysfs_en = false;
                if (!amdgpu_sriov_vf(adev))
                        DRM_ERROR("Creating psp sysfs failed\n");
        } else
                adev->psp_sysfs_en = true;

        /*
         * 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.
         */
        if (!adev->gmc.xgmi.pending_reset) {
                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 release_ras_con;
                }
                /* 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);

        /* 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 */
        if ((adev->pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA)
                vga_client_register(adev->pdev, amdgpu_device_vga_set_decode);

        if (amdgpu_device_supports_px(ddev)) {
                px = true;
                vga_switcheroo_register_client(adev->pdev,
                                               &amdgpu_switcheroo_ops, px);
                vga_switcheroo_init_domain_pm_ops(adev->dev, &adev->vga_pm_domain);
        }

        if (adev->gmc.xgmi.pending_reset)
                queue_delayed_work(system_wq, &mgpu_info.delayed_reset_work,
                                   msecs_to_jiffies(AMDGPU_RESUME_MS));

        amdgpu_device_check_iommu_direct_map(adev);

        return 0;

release_ras_con:
        amdgpu_release_ras_context(adev);

failed:
        amdgpu_vf_error_trans_all(adev);

        return r;
}

static void amdgpu_device_unmap_mmio(struct amdgpu_device *adev)
{

        /* Clear all CPU mappings pointing to this device */
        unmap_mapping_range(adev->ddev.anon_inode->i_mapping, 0, 0, 1);

        /* Unmap all mapped bars - Doorbell, registers and VRAM */
        amdgpu_device_doorbell_fini(adev);

        iounmap(adev->rmmio);
        adev->rmmio = NULL;
        if (adev->mman.aper_base_kaddr)
                iounmap(adev->mman.aper_base_kaddr);
        adev->mman.aper_base_kaddr = NULL;

        /* Memory manager related */
        if (!adev->gmc.xgmi.connected_to_cpu) {
                arch_phys_wc_del(adev->gmc.vram_mtrr);
                arch_io_free_memtype_wc(adev->gmc.aper_base, adev->gmc.aper_size);
        }
}

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

        /* 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 (!drm_drv_uses_atomic_modeset(adev_to_drm(adev)))
                        drm_helper_force_disable_all(adev_to_drm(adev));
                else
                        drm_atomic_helper_shutdown(adev_to_drm(adev));
        }
        amdgpu_fence_driver_hw_fini(adev);

        if (adev->mman.initialized)
                drain_workqueue(adev->mman.bdev.wq);

        if (adev->pm_sysfs_en)
                amdgpu_pm_sysfs_fini(adev);
        if (adev->ucode_sysfs_en)
                amdgpu_ucode_sysfs_fini(adev);
        if (adev->psp_sysfs_en)
                amdgpu_psp_sysfs_fini(adev);
        sysfs_remove_files(&adev->dev->kobj, amdgpu_dev_attributes);

        /* disable ras feature must before hw fini */
        amdgpu_ras_pre_fini(adev);

        amdgpu_device_ip_fini_early(adev);

        amdgpu_irq_fini_hw(adev);

        if (adev->mman.initialized)
                ttm_device_clear_dma_mappings(&adev->mman.bdev);

        amdgpu_gart_dummy_page_fini(adev);

        amdgpu_device_unmap_mmio(adev);

}

void amdgpu_device_fini_sw(struct amdgpu_device *adev)
{
        int idx;

        amdgpu_fence_driver_sw_fini(adev);
        amdgpu_device_ip_fini(adev);
        amdgpu_ucode_release(&adev->firmware.gpu_info_fw);
        adev->accel_working = false;
        dma_fence_put(rcu_dereference_protected(adev->gang_submit, true));

        amdgpu_reset_fini(adev);

        /* 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_device_supports_px(adev_to_drm(adev))) {
                vga_switcheroo_unregister_client(adev->pdev);
                vga_switcheroo_fini_domain_pm_ops(adev->dev);
        }
        if ((adev->pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA)
                vga_client_unregister(adev->pdev);

        if (drm_dev_enter(adev_to_drm(adev), &idx)) {

                iounmap(adev->rmmio);
                adev->rmmio = NULL;
                amdgpu_device_doorbell_fini(adev);
                drm_dev_exit(idx);
        }

        if (IS_ENABLED(CONFIG_PERF_EVENTS))
                amdgpu_pmu_fini(adev);
        if (adev->mman.discovery_bin)
                amdgpu_discovery_fini(adev);

        amdgpu_reset_put_reset_domain(adev->reset_domain);
        adev->reset_domain = NULL;

        kfree(adev->pci_state);

}

/**
 * amdgpu_device_evict_resources - evict device resources
 * @adev: amdgpu device object
 *
 * Evicts all ttm device resources(vram BOs, gart table) from the lru list
 * of the vram memory type. Mainly used for evicting device resources
 * at suspend time.
 *
 */
static int amdgpu_device_evict_resources(struct amdgpu_device *adev)
{
        int ret;

        /* No need to evict vram on APUs for suspend to ram or s2idle */
        if ((adev->in_s3 || adev->in_s0ix) && (adev->flags & AMD_IS_APU))
                return 0;

        ret = amdgpu_ttm_evict_resources(adev, TTM_PL_VRAM);
        if (ret)
                DRM_WARN("evicting device resources failed\n");
        return ret;
}

/*
 * 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 = drm_to_adev(dev);
        int r = 0;

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

        adev->in_suspend = true;

        /* Evict the majority of BOs before grabbing the full access */
        r = amdgpu_device_evict_resources(adev);
        if (r)
                return r;

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

        if (amdgpu_acpi_smart_shift_update(dev, AMDGPU_SS_DEV_D3))
                DRM_WARN("smart shift update failed\n");

        drm_kms_helper_poll_disable(dev);

        if (fbcon)
                drm_fb_helper_set_suspend_unlocked(adev_to_drm(adev)->fb_helper, true);

        cancel_delayed_work_sync(&adev->delayed_init_work);

        amdgpu_ras_suspend(adev);

        amdgpu_device_ip_suspend_phase1(adev);

        if (!adev->in_s0ix)
                amdgpu_amdkfd_suspend(adev, adev->in_runpm);

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

        amdgpu_fence_driver_hw_fini(adev);

        amdgpu_device_ip_suspend_phase2(adev);

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

        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 amdgpu_device *adev = drm_to_adev(dev);
        int r = 0;

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

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

        if (adev->in_s0ix)
                amdgpu_dpm_gfx_state_change(adev, sGpuChangeState_D0Entry);

        /* 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);
                goto exit;
        }
        amdgpu_fence_driver_hw_init(adev);

        r = amdgpu_device_ip_late_init(adev);
        if (r)
                goto exit;

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

        if (!adev->in_s0ix) {
                r = amdgpu_amdkfd_resume(adev, adev->in_runpm);
                if (r)
                        goto exit;
        }

exit:
        if (amdgpu_sriov_vf(adev)) {
                amdgpu_virt_init_data_exchange(adev);
                amdgpu_virt_release_full_gpu(adev, true);
        }

        if (r)
                return r;

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

        if (fbcon)
                drm_fb_helper_set_suspend_unlocked(adev_to_drm(adev)->fb_helper, false);

        drm_kms_helper_poll_enable(dev);

        amdgpu_ras_resume(adev);

        if (adev->mode_info.num_crtc) {
                /*
                 * 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 (!adev->dc_enabled)
                        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;

        if (amdgpu_acpi_smart_shift_update(dev, AMDGPU_SS_DEV_D0))
                DRM_WARN("smart shift update failed\n");

        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;
        struct amdgpu_bo_vm *vmbo;
        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(vmbo, &adev->shadow_list, shadow_list) {
                shadow = &vmbo->bo;
                /* No need to recover an evicted BO */
                if (shadow->tbo.resource->mem_type != TTM_PL_TT ||
                    shadow->tbo.resource->start == AMDGPU_BO_INVALID_OFFSET ||
                    shadow->parent->tbo.resource->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;
        struct amdgpu_hive_info *hive = NULL;
        int retry_limit = 0;

retry:
        amdgpu_amdkfd_pre_reset(adev);

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

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

        amdgpu_virt_init_data_exchange(adev);

        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;

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

        if (hive)
                amdgpu_put_xgmi_hive(hive);

        if (!r) {
                amdgpu_irq_gpu_reset_resume_helper(adev);
                r = amdgpu_ib_ring_tests(adev);

                amdgpu_amdkfd_post_reset(adev);
        }

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

        if (AMDGPU_RETRY_SRIOV_RESET(r)) {
                if (retry_limit < AMDGPU_MAX_RETRY_LIMIT) {
                        retry_limit++;
                        goto retry;
                } else
                        DRM_ERROR("GPU reset retry is beyond the retry limit\n");
        }

        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_gpu_recovery == 0)
                goto disabled;

        /* Skip soft reset check in fatal error mode */
        if (!amdgpu_ras_is_poison_mode_supported(adev))
                return true;

        if (amdgpu_sriov_vf(adev))
                return true;

        if (amdgpu_gpu_recovery == -1) {
                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_KAVERI:
                case CHIP_KABINI:
                case CHIP_MULLINS:
#endif
                case CHIP_CARRIZO:
                case CHIP_STONEY:
                case CHIP_CYAN_SKILLFISH:
                        goto disabled;
                default:
                        break;
                }
        }

        return true;

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

int amdgpu_device_mode1_reset(struct amdgpu_device *adev)
{
        u32 i;
        int ret = 0;

        amdgpu_atombios_scratch_regs_engine_hung(adev, true);

        dev_info(adev->dev, "GPU mode1 reset\n");

        /* disable BM */
        pci_clear_master(adev->pdev);

        amdgpu_device_cache_pci_state(adev->pdev);

        if (amdgpu_dpm_is_mode1_reset_supported(adev)) {
                dev_info(adev->dev, "GPU smu mode1 reset\n");
                ret = amdgpu_dpm_mode1_reset(adev);
        } else {
                dev_info(adev->dev, "GPU psp mode1 reset\n");
                ret = psp_gpu_reset(adev);
        }

        if (ret)
                dev_err(adev->dev, "GPU mode1 reset failed\n");

        amdgpu_device_load_pci_state(adev->pdev);

        /* wait for asic to come out of reset */
        for (i = 0; i < adev->usec_timeout; i++) {
                u32 memsize = adev->nbio.funcs->get_memsize(adev);

                if (memsize != 0xffffffff)
                        break;
                udelay(1);
        }

        amdgpu_atombios_scratch_regs_engine_hung(adev, false);
        return ret;
}

int amdgpu_device_pre_asic_reset(struct amdgpu_device *adev,
                                 struct amdgpu_reset_context *reset_context)
{
        int i, r = 0;
        struct amdgpu_job *job = NULL;
        bool need_full_reset =
                test_bit(AMDGPU_NEED_FULL_RESET, &reset_context->flags);

        if (reset_context->reset_req_dev == adev)
                job = reset_context->job;

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

        amdgpu_fence_driver_isr_toggle(adev, true);

        /* 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;

                /*clear job fence from fence drv to avoid force_completion
                 *leave NULL and vm flush fence in fence drv */
                amdgpu_fence_driver_clear_job_fences(ring);

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

        amdgpu_fence_driver_isr_toggle(adev, false);

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

        r = amdgpu_reset_prepare_hwcontext(adev, reset_context);
        /* If reset handler not implemented, continue; otherwise return */
        if (r == -ENOSYS)
                r = 0;
        else
                return r;

        /* 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_gpu_recovery &&
                    amdgpu_device_ip_check_soft_reset(adev)) {
                        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);
                if (need_full_reset)
                        set_bit(AMDGPU_NEED_FULL_RESET, &reset_context->flags);
                else
                        clear_bit(AMDGPU_NEED_FULL_RESET,
                                  &reset_context->flags);
        }

        return r;
}

static int amdgpu_reset_reg_dumps(struct amdgpu_device *adev)
{
        int i;

        lockdep_assert_held(&adev->reset_domain->sem);

        for (i = 0; i < adev->num_regs; i++) {
                adev->reset_dump_reg_value[i] = RREG32(adev->reset_dump_reg_list[i]);
                trace_amdgpu_reset_reg_dumps(adev->reset_dump_reg_list[i],
                                             adev->reset_dump_reg_value[i]);
        }

        return 0;
}

#ifdef CONFIG_DEV_COREDUMP
static ssize_t amdgpu_devcoredump_read(char *buffer, loff_t offset,
                size_t count, void *data, size_t datalen)
{
        struct drm_printer p;
        struct amdgpu_device *adev = data;
        struct drm_print_iterator iter;
        int i;

        iter.data = buffer;
        iter.offset = 0;
        iter.start = offset;
        iter.remain = count;

        p = drm_coredump_printer(&iter);

        drm_printf(&p, "**** AMDGPU Device Coredump ****\n");
        drm_printf(&p, "kernel: " UTS_RELEASE "\n");
        drm_printf(&p, "module: " KBUILD_MODNAME "\n");
        drm_printf(&p, "time: %lld.%09ld\n", adev->reset_time.tv_sec, adev->reset_time.tv_nsec);
        if (adev->reset_task_info.pid)
                drm_printf(&p, "process_name: %s PID: %d\n",
                           adev->reset_task_info.process_name,
                           adev->reset_task_info.pid);

        if (adev->reset_vram_lost)
                drm_printf(&p, "VRAM is lost due to GPU reset!\n");
        if (adev->num_regs) {
                drm_printf(&p, "AMDGPU register dumps:\nOffset:     Value:\n");

                for (i = 0; i < adev->num_regs; i++)
                        drm_printf(&p, "0x%08x: 0x%08x\n",
                                   adev->reset_dump_reg_list[i],
                                   adev->reset_dump_reg_value[i]);
        }

        return count - iter.remain;
}

static void amdgpu_devcoredump_free(void *data)
{
}

static void amdgpu_reset_capture_coredumpm(struct amdgpu_device *adev)
{
        struct drm_device *dev = adev_to_drm(adev);

        ktime_get_ts64(&adev->reset_time);
        dev_coredumpm(dev->dev, THIS_MODULE, adev, 0, GFP_KERNEL,
                      amdgpu_devcoredump_read, amdgpu_devcoredump_free);
}
#endif

int amdgpu_do_asic_reset(struct list_head *device_list_handle,
                         struct amdgpu_reset_context *reset_context)
{
        struct amdgpu_device *tmp_adev = NULL;
        bool need_full_reset, skip_hw_reset, vram_lost = false;
        int r = 0;
        bool gpu_reset_for_dev_remove = 0;

        /* Try reset handler method first */
        tmp_adev = list_first_entry(device_list_handle, struct amdgpu_device,
                                    reset_list);
        amdgpu_reset_reg_dumps(tmp_adev);

        reset_context->reset_device_list = device_list_handle;
        r = amdgpu_reset_perform_reset(tmp_adev, reset_context);
        /* If reset handler not implemented, continue; otherwise return */
        if (r == -ENOSYS)
                r = 0;
        else
                return r;

        /* Reset handler not implemented, use the default method */
        need_full_reset =
                test_bit(AMDGPU_NEED_FULL_RESET, &reset_context->flags);
        skip_hw_reset = test_bit(AMDGPU_SKIP_HW_RESET, &reset_context->flags);

        gpu_reset_for_dev_remove =
                test_bit(AMDGPU_RESET_FOR_DEVICE_REMOVE, &reset_context->flags) &&
                        test_bit(AMDGPU_NEED_FULL_RESET, &reset_context->flags);

        /*
         * ASIC reset has to be done on all XGMI 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, reset_list) {
                        /* For XGMI run all resets in parallel to speed up the process */
                        if (tmp_adev->gmc.xgmi.num_physical_nodes > 1) {
                                tmp_adev->gmc.xgmi.pending_reset = false;
                                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, reset_list) {
                                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, reset_list) {
                        if (tmp_adev->mmhub.ras && tmp_adev->mmhub.ras->ras_block.hw_ops &&
                            tmp_adev->mmhub.ras->ras_block.hw_ops->reset_ras_error_count)
                                tmp_adev->mmhub.ras->ras_block.hw_ops->reset_ras_error_count(tmp_adev);
                }

                amdgpu_ras_intr_cleared();
        }

        /* Since the mode1 reset affects base ip blocks, the
         * phase1 ip blocks need to be resumed. Otherwise there
         * will be a BIOS signature error and the psp bootloader
         * can't load kdb on the next amdgpu install.
         */
        if (gpu_reset_for_dev_remove) {
                list_for_each_entry(tmp_adev, device_list_handle, reset_list)
                        amdgpu_device_ip_resume_phase1(tmp_adev);

                goto end;
        }

        list_for_each_entry(tmp_adev, device_list_handle, reset_list) {
                if (need_full_reset) {
                        /* post card */
                        r = amdgpu_device_asic_init(tmp_adev);
                        if (r) {
                                dev_warn(tmp_adev->dev, "asic atom init failed!");
                        } else {
                                dev_info(tmp_adev->dev, "GPU reset succeeded, trying to resume\n");
                                r = amdgpu_amdkfd_resume_iommu(tmp_adev);
                                if (r)
                                        goto out;

                                r = amdgpu_device_ip_resume_phase1(tmp_adev);
                                if (r)
                                        goto out;

                                vram_lost = amdgpu_device_check_vram_lost(tmp_adev);
#ifdef CONFIG_DEV_COREDUMP
                                tmp_adev->reset_vram_lost = vram_lost;
                                memset(&tmp_adev->reset_task_info, 0,
                                                sizeof(tmp_adev->reset_task_info));
                                if (reset_context->job && reset_context->job->vm)
                                        tmp_adev->reset_task_info =
                                                reset_context->job->vm->task_info;
                                amdgpu_reset_capture_coredumpm(tmp_adev);
#endif
                                if (vram_lost) {
                                        DRM_INFO("VRAM is lost due to GPU reset!\n");
                                        amdgpu_inc_vram_lost(tmp_adev);
                                }

                                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);

                                if (!reset_context->hive &&
                                    tmp_adev->gmc.xgmi.num_physical_nodes > 1)
                                        amdgpu_xgmi_add_device(tmp_adev);

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

                                drm_fb_helper_set_suspend_unlocked(adev_to_drm(tmp_adev)->fb_helper, false);

                                /*
                                 * 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_eeprom_check_err_threshold(tmp_adev)) {
                                        /* must succeed. */
                                        amdgpu_ras_resume(tmp_adev);
                                } else {
                                        r = -EINVAL;
                                        goto out;
                                }

                                /* Update PSP FW topology after reset */
                                if (reset_context->hive &&
                                    tmp_adev->gmc.xgmi.num_physical_nodes > 1)
                                        r = amdgpu_xgmi_update_topology(
                                                reset_context->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);
                                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:
        if (need_full_reset)
                set_bit(AMDGPU_NEED_FULL_RESET, &reset_context->flags);
        else
                clear_bit(AMDGPU_NEED_FULL_RESET, &reset_context->flags);
        return r;
}

static void amdgpu_device_set_mp1_state(struct amdgpu_device *adev)
{

        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;
        }
}

static void amdgpu_device_unset_mp1_state(struct amdgpu_device *adev)
{
        amdgpu_vf_error_trans_all(adev);
        adev->mp1_state = PP_MP1_STATE_NONE;
}

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));
        }

        pci_dev_put(p);
}

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");
                        pci_dev_put(p);
                        /* TODO: abort the succeeding gpu reset? */
                        return -ETIMEDOUT;
                }
        }

        pm_runtime_disable(&(p->dev));

        pci_dev_put(p);
        return 0;
}

static inline void amdgpu_device_stop_pending_resets(struct amdgpu_device *adev)
{
        struct amdgpu_ras *con = amdgpu_ras_get_context(adev);

#if defined(CONFIG_DEBUG_FS)
        if (!amdgpu_sriov_vf(adev))
                cancel_work(&adev->reset_work);
#endif

        if (adev->kfd.dev)
                cancel_work(&adev->kfd.reset_work);

        if (amdgpu_sriov_vf(adev))
                cancel_work(&adev->virt.flr_work);

        if (con && adev->ras_enabled)
                cancel_work(&con->recovery_work);

}

/**
 * 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 amdgpu_reset_context *reset_context)
{
        struct list_head device_list, *device_list_handle =  NULL;
        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;
        bool gpu_reset_for_dev_remove = false;

        gpu_reset_for_dev_remove =
                        test_bit(AMDGPU_RESET_FOR_DEVICE_REMOVE, &reset_context->flags) &&
                                test_bit(AMDGPU_NEED_FULL_RESET, &reset_context->flags);

        /*
         * 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");

        if (!amdgpu_sriov_vf(adev))
                hive = amdgpu_get_xgmi_hive(adev);
        if (hive)
                mutex_lock(&hive->hive_lock);

        reset_context->job = job;
        reset_context->hive = hive;
        /*
         * 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 (!amdgpu_sriov_vf(adev) && (adev->gmc.xgmi.num_physical_nodes > 1)) {
                list_for_each_entry(tmp_adev, &hive->device_list, gmc.xgmi.head) {
                        list_add_tail(&tmp_adev->reset_list, &device_list);
                        if (gpu_reset_for_dev_remove && adev->shutdown)
                                tmp_adev->shutdown = true;
                }
                if (!list_is_first(&adev->reset_list, &device_list))
                        list_rotate_to_front(&adev->reset_list, &device_list);
                device_list_handle = &device_list;
        } else {
                list_add_tail(&adev->reset_list, &device_list);
                device_list_handle = &device_list;
        }

        /* We need to lock reset domain only once both for XGMI and single device */
        tmp_adev = list_first_entry(device_list_handle, struct amdgpu_device,
                                    reset_list);
        amdgpu_device_lock_reset_domain(tmp_adev->reset_domain);

        /* block all schedulers and reset given job's ring */
        list_for_each_entry(tmp_adev, device_list_handle, reset_list) {

                amdgpu_device_set_mp1_state(tmp_adev);

                /*
                 * 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);

                drm_fb_helper_set_suspend_unlocked(adev_to_drm(tmp_adev)->fb_helper, true);

                /* 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);
                }
                atomic_inc(&tmp_adev->gpu_reset_counter);
        }

        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 && dma_fence_is_signaled(&job->hw_fence)) {
                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, reset_list) {
                if (gpu_reset_for_dev_remove) {
                        /* Workaroud for ASICs need to disable SMC first */
                        amdgpu_device_smu_fini_early(tmp_adev);
                }
                r = amdgpu_device_pre_asic_reset(tmp_adev, reset_context);
                /*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;
                }

                /*
                 * Drop all pending non scheduler resets. Scheduler resets
                 * were already dropped during drm_sched_stop
                 */
                amdgpu_device_stop_pending_resets(tmp_adev);
        }

        /* Actual ASIC resets if needed.*/
        /* Host driver will handle XGMI hive reset for SRIOV */
        if (amdgpu_sriov_vf(adev)) {
                r = amdgpu_device_reset_sriov(adev, job ? false : true);
                if (r)
                        adev->asic_reset_res = r;

                /* Aldebaran supports ras in SRIOV, so need resume ras during reset */
                if (adev->ip_versions[GC_HWIP][0] == IP_VERSION(9, 4, 2))
                        amdgpu_ras_resume(adev);
        } else {
                r = amdgpu_do_asic_reset(device_list_handle, reset_context);
                if (r && r == -EAGAIN)
                        goto retry;

                if (!r && gpu_reset_for_dev_remove)
                        goto recover_end;
        }

skip_hw_reset:

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

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

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

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

                if (adev->enable_mes && adev->ip_versions[GC_HWIP][0] != IP_VERSION(11, 0, 3))
                        amdgpu_mes_self_test(tmp_adev);

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

                if (tmp_adev->asic_reset_res)
                        r = tmp_adev->asic_reset_res;

                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));
                        if (amdgpu_acpi_smart_shift_update(adev_to_drm(tmp_adev), AMDGPU_SS_DEV_D0))
                                DRM_WARN("smart shift update failed\n");
                }
        }

skip_sched_resume:
        list_for_each_entry(tmp_adev, device_list_handle, reset_list) {
                /* unlock kfd: SRIOV would do it separately */
                if (!need_emergency_restart && !amdgpu_sriov_vf(tmp_adev))
                        amdgpu_amdkfd_post_reset(tmp_adev);

                /* kfd_post_reset will do nothing if kfd device is not initialized,
                 * need to bring up kfd here if it's not be initialized before
                 */
                if (!adev->kfd.init_complete)
                        amdgpu_amdkfd_device_init(adev);

                if (audio_suspended)
                        amdgpu_device_resume_display_audio(tmp_adev);

                amdgpu_device_unset_mp1_state(tmp_adev);

                amdgpu_ras_set_error_query_ready(tmp_adev, true);
        }

recover_end:
        tmp_adev = list_first_entry(device_list_handle, struct amdgpu_device,
                                            reset_list);
        amdgpu_device_unlock_reset_domain(tmp_adev->reset_domain);

        if (hive) {
                mutex_unlock(&hive->hive_lock);
                amdgpu_put_xgmi_hive(hive);
        }

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

        atomic_set(&adev->reset_domain->reset_res, 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_32_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 |
                                                          CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN5);
                        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_32_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 |
                                                           CAIL_PCIE_LINK_SPEED_SUPPORT_GEN5);
                        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;
                        }
                }
        }
}

/**
 * amdgpu_device_is_peer_accessible - Check peer access through PCIe BAR
 *
 * @adev: amdgpu_device pointer
 * @peer_adev: amdgpu_device pointer for peer device trying to access @adev
 *
 * Return true if @peer_adev can access (DMA) @adev through the PCIe
 * BAR, i.e. @adev is "large BAR" and the BAR matches the DMA mask of
 * @peer_adev.
 */
bool amdgpu_device_is_peer_accessible(struct amdgpu_device *adev,
                                      struct amdgpu_device *peer_adev)
{
#ifdef CONFIG_HSA_AMD_P2P
        uint64_t address_mask = peer_adev->dev->dma_mask ?
                ~*peer_adev->dev->dma_mask : ~((1ULL << 32) - 1);
        resource_size_t aper_limit =
                adev->gmc.aper_base + adev->gmc.aper_size - 1;
        bool p2p_access =
                !adev->gmc.xgmi.connected_to_cpu &&
                !(pci_p2pdma_distance(adev->pdev, peer_adev->dev, false) < 0);

        return pcie_p2p && p2p_access && (adev->gmc.visible_vram_size &&
                adev->gmc.real_vram_size == adev->gmc.visible_vram_size &&
                !(adev->gmc.aper_base & address_mask ||
                  aper_limit & address_mask));
#else
        return false;
#endif
}

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 && adev->ras_enabled &&
            adev->nbio.funcs->enable_doorbell_interrupt)
                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 && adev->ras_enabled &&
            adev->nbio.funcs->enable_doorbell_interrupt)
                adev->nbio.funcs->enable_doorbell_interrupt(adev, true);

        if (amdgpu_passthrough(adev) &&
            adev->nbio.funcs->clear_doorbell_interrupt)
                adev->nbio.funcs->clear_doorbell_interrupt(adev);

        return 0;
}

/**
 * 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;
        }

        adev->pci_channel_state = state;

        switch (state) {
        case pci_channel_io_normal:
                return PCI_ERS_RESULT_CAN_RECOVER;
        /* Fatal error, prepare for slot reset */
        case pci_channel_io_frozen:
                /*
                 * Locking adev->reset_domain->sem will prevent any external access
                 * to GPU during PCI error recovery
                 */
                amdgpu_device_lock_reset_domain(adev->reset_domain);
                amdgpu_device_set_mp1_state(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);
                }
                atomic_inc(&adev->gpu_reset_counter);
                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;
        struct amdgpu_reset_context reset_context;
        u32 memsize;
        struct list_head device_list;

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

        memset(&reset_context, 0, sizeof(reset_context));

        INIT_LIST_HEAD(&device_list);
        list_add_tail(&adev->reset_list, &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;
        }

        reset_context.method = AMD_RESET_METHOD_NONE;
        reset_context.reset_req_dev = adev;
        set_bit(AMDGPU_NEED_FULL_RESET, &reset_context.flags);
        set_bit(AMDGPU_SKIP_HW_RESET, &reset_context.flags);

        adev->no_hw_access = true;
        r = amdgpu_device_pre_asic_reset(adev, &reset_context);
        adev->no_hw_access = false;
        if (r)
                goto out;

        r = amdgpu_do_asic_reset(&device_list, &reset_context);

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_unset_mp1_state(adev);
                amdgpu_device_unlock_reset_domain(adev->reset_domain);
        }

        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.
 */
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");

        /* Only continue execution for the case of pci_channel_io_frozen */
        if (adev->pci_channel_state != pci_channel_io_frozen)
                return;

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

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

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

        amdgpu_device_unset_mp1_state(adev);
        amdgpu_device_unlock_reset_domain(adev->reset_domain);
}

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;
}

void amdgpu_device_flush_hdp(struct amdgpu_device *adev,
                struct amdgpu_ring *ring)
{
#ifdef CONFIG_X86_64
        if ((adev->flags & AMD_IS_APU) && !amdgpu_passthrough(adev))
                return;
#endif
        if (adev->gmc.xgmi.connected_to_cpu)
                return;

        if (ring && ring->funcs->emit_hdp_flush)
                amdgpu_ring_emit_hdp_flush(ring);
        else
                amdgpu_asic_flush_hdp(adev, ring);
}

void amdgpu_device_invalidate_hdp(struct amdgpu_device *adev,
                struct amdgpu_ring *ring)
{
#ifdef CONFIG_X86_64
        if ((adev->flags & AMD_IS_APU) && !amdgpu_passthrough(adev))
                return;
#endif
        if (adev->gmc.xgmi.connected_to_cpu)
                return;

        amdgpu_asic_invalidate_hdp(adev, ring);
}

int amdgpu_in_reset(struct amdgpu_device *adev)
{
        return atomic_read(&adev->reset_domain->in_gpu_reset);
}

/**
 * amdgpu_device_halt() - bring hardware to some kind of halt state
 *
 * @adev: amdgpu_device pointer
 *
 * Bring hardware to some kind of halt state so that no one can touch it
 * any more. It will help to maintain error context when error occurred.
 * Compare to a simple hang, the system will keep stable at least for SSH
 * access. Then it should be trivial to inspect the hardware state and
 * see what's going on. Implemented as following:
 *
 * 1. drm_dev_unplug() makes device inaccessible to user space(IOCTLs, etc),
 *    clears all CPU mappings to device, disallows remappings through page faults
 * 2. amdgpu_irq_disable_all() disables all interrupts
 * 3. amdgpu_fence_driver_hw_fini() signals all HW fences
 * 4. set adev->no_hw_access to avoid potential crashes after setp 5
 * 5. amdgpu_device_unmap_mmio() clears all MMIO mappings
 * 6. pci_disable_device() and pci_wait_for_pending_transaction()
 *    flush any in flight DMA operations
 */
void amdgpu_device_halt(struct amdgpu_device *adev)
{
        struct pci_dev *pdev = adev->pdev;
        struct drm_device *ddev = adev_to_drm(adev);

        drm_dev_unplug(ddev);

        amdgpu_irq_disable_all(adev);

        amdgpu_fence_driver_hw_fini(adev);

        adev->no_hw_access = true;

        amdgpu_device_unmap_mmio(adev);

        pci_disable_device(pdev);
        pci_wait_for_pending_transaction(pdev);
}

u32 amdgpu_device_pcie_port_rreg(struct amdgpu_device *adev,
                                u32 reg)
{
        unsigned long flags, address, data;
        u32 r;

        address = adev->nbio.funcs->get_pcie_port_index_offset(adev);
        data = adev->nbio.funcs->get_pcie_port_data_offset(adev);

        spin_lock_irqsave(&adev->pcie_idx_lock, flags);
        WREG32(address, reg * 4);
        (void)RREG32(address);
        r = RREG32(data);
        spin_unlock_irqrestore(&adev->pcie_idx_lock, flags);
        return r;
}

void amdgpu_device_pcie_port_wreg(struct amdgpu_device *adev,
                                u32 reg, u32 v)
{
        unsigned long flags, address, data;

        address = adev->nbio.funcs->get_pcie_port_index_offset(adev);
        data = adev->nbio.funcs->get_pcie_port_data_offset(adev);

        spin_lock_irqsave(&adev->pcie_idx_lock, flags);
        WREG32(address, reg * 4);
        (void)RREG32(address);
        WREG32(data, v);
        (void)RREG32(data);
        spin_unlock_irqrestore(&adev->pcie_idx_lock, flags);
}

/**
 * amdgpu_device_switch_gang - switch to a new gang
 * @adev: amdgpu_device pointer
 * @gang: the gang to switch to
 *
 * Try to switch to a new gang.
 * Returns: NULL if we switched to the new gang or a reference to the current
 * gang leader.
 */
struct dma_fence *amdgpu_device_switch_gang(struct amdgpu_device *adev,
                                            struct dma_fence *gang)
{
        struct dma_fence *old = NULL;

        do {
                dma_fence_put(old);
                rcu_read_lock();
                old = dma_fence_get_rcu_safe(&adev->gang_submit);
                rcu_read_unlock();

                if (old == gang)
                        break;

                if (!dma_fence_is_signaled(old))
                        return old;

        } while (cmpxchg((struct dma_fence __force **)&adev->gang_submit,
                         old, gang) != old);

        dma_fence_put(old);
        return NULL;
}

bool amdgpu_device_has_display_hardware(struct amdgpu_device *adev)
{
        switch (adev->asic_type) {
#ifdef CONFIG_DRM_AMDGPU_SI
        case CHIP_HAINAN:
#endif
        case CHIP_TOPAZ:
                /* chips with no display hardware */
                return false;
#ifdef CONFIG_DRM_AMDGPU_SI
        case CHIP_TAHITI:
        case CHIP_PITCAIRN:
        case CHIP_VERDE:
        case CHIP_OLAND:
#endif
#ifdef CONFIG_DRM_AMDGPU_CIK
        case CHIP_BONAIRE:
        case CHIP_HAWAII:
        case CHIP_KAVERI:
        case CHIP_KABINI:
        case CHIP_MULLINS:
#endif
        case CHIP_TONGA:
        case CHIP_FIJI:
        case CHIP_POLARIS10:
        case CHIP_POLARIS11:
        case CHIP_POLARIS12:
        case CHIP_VEGAM:
        case CHIP_CARRIZO:
        case CHIP_STONEY:
                /* chips with display hardware */
                return true;
        default:
                /* IP discovery */
                if (!adev->ip_versions[DCE_HWIP][0] ||
                    (adev->harvest_ip_mask & AMD_HARVEST_IP_DMU_MASK))
                        return false;
                return true;
        }
}