Merge tag 'gvt-next-2018-09-04' of https://github.com/intel/gvt-linux into drm-intel...

[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/console.h>
#include <linux/slab.h>
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_atomic_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 "bif/bif_4_1_d.h"
#include <linux/pci.h>
#include <linux/firmware.h>
#include "amdgpu_vf_error.h"

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

MODULE_FIRMWARE("amdgpu/vega10_gpu_info.bin");
MODULE_FIRMWARE("amdgpu/vega12_gpu_info.bin");
MODULE_FIRMWARE("amdgpu/raven_gpu_info.bin");

#define AMDGPU_RESUME_MS                2000

static 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",
        "LAST",
};

static void amdgpu_device_get_pcie_info(struct amdgpu_device *adev);

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

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

/*
 * MMIO register access helper functions.
 */
/**
 * amdgpu_mm_rreg - read a memory mapped IO 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_mm_rreg(struct amdgpu_device *adev, uint32_t reg,
                        uint32_t acc_flags)
{
        uint32_t ret;

        if (!(acc_flags & AMDGPU_REGS_NO_KIQ) && amdgpu_sriov_runtime(adev))
                return amdgpu_virt_kiq_rreg(adev, reg);

        if ((reg * 4) < adev->rmmio_size && !(acc_flags & AMDGPU_REGS_IDX))
                ret = readl(((void __iomem *)adev->rmmio) + (reg * 4));
        else {
                unsigned long flags;

                spin_lock_irqsave(&adev->mmio_idx_lock, flags);
                writel((reg * 4), ((void __iomem *)adev->rmmio) + (mmMM_INDEX * 4));
                ret = readl(((void __iomem *)adev->rmmio) + (mmMM_DATA * 4));
                spin_unlock_irqrestore(&adev->mmio_idx_lock, flags);
        }
        trace_amdgpu_mm_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 (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 (offset < adev->rmmio_size)
                writeb(value, adev->rmmio + offset);
        else
                BUG();
}

/**
 * amdgpu_mm_wreg - write to a memory mapped IO 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_mm_wreg(struct amdgpu_device *adev, uint32_t reg, uint32_t v,
                    uint32_t acc_flags)
{
        trace_amdgpu_mm_wreg(adev->pdev->device, reg, v);

        if (adev->asic_type >= CHIP_VEGA10 && reg == 0) {
                adev->last_mm_index = v;
        }

        if (!(acc_flags & AMDGPU_REGS_NO_KIQ) && amdgpu_sriov_runtime(adev))
                return amdgpu_virt_kiq_wreg(adev, reg, v);

        if ((reg * 4) < adev->rmmio_size && !(acc_flags & AMDGPU_REGS_IDX))
                writel(v, ((void __iomem *)adev->rmmio) + (reg * 4));
        else {
                unsigned long flags;

                spin_lock_irqsave(&adev->mmio_idx_lock, flags);
                writel((reg * 4), ((void __iomem *)adev->rmmio) + (mmMM_INDEX * 4));
                writel(v, ((void __iomem *)adev->rmmio) + (mmMM_DATA * 4));
                spin_unlock_irqrestore(&adev->mmio_idx_lock, flags);
        }

        if (adev->asic_type >= CHIP_VEGA10 && reg == 1 && adev->last_mm_index == 0x5702C) {
                udelay(500);
        }
}

/**
 * amdgpu_io_rreg - read an IO register
 *
 * @adev: amdgpu_device pointer
 * @reg: dword aligned register offset
 *
 * Returns the 32 bit value from the offset specified.
 */
u32 amdgpu_io_rreg(struct amdgpu_device *adev, u32 reg)
{
        if ((reg * 4) < adev->rio_mem_size)
                return ioread32(adev->rio_mem + (reg * 4));
        else {
                iowrite32((reg * 4), adev->rio_mem + (mmMM_INDEX * 4));
                return ioread32(adev->rio_mem + (mmMM_DATA * 4));
        }
}

/**
 * amdgpu_io_wreg - write to an IO register
 *
 * @adev: amdgpu_device pointer
 * @reg: dword aligned register offset
 * @v: 32 bit value to write to the register
 *
 * Writes the value specified to the offset specified.
 */
void amdgpu_io_wreg(struct amdgpu_device *adev, u32 reg, u32 v)
{
        if (adev->asic_type >= CHIP_VEGA10 && reg == 0) {
                adev->last_mm_index = v;
        }

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

        if (adev->asic_type >= CHIP_VEGA10 && reg == 1 && adev->last_mm_index == 0x5702C) {
                udelay(500);
        }
}

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

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

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

        if (array_size % 3)
                return;

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

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

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

/*
 * GPU doorbell aperture helpers function.
 */
/**
 * amdgpu_device_doorbell_init - Init doorbell driver information.
 *
 * @adev: amdgpu_device pointer
 *
 * Init doorbell driver information (CIK)
 * Returns 0 on success, error on failure.
 */
static int amdgpu_device_doorbell_init(struct amdgpu_device *adev)
{
        /* No doorbell on SI hardware generation */
        if (adev->asic_type < CHIP_BONAIRE) {
                adev->doorbell.base = 0;
                adev->doorbell.size = 0;
                adev->doorbell.num_doorbells = 0;
                adev->doorbell.ptr = NULL;
                return 0;
        }

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

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

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

        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_vram_location - try to find VRAM location
 *
 * @adev: amdgpu device structure holding all necessary informations
 * @mc: memory controller structure holding memory informations
 * @base: base address at which to put VRAM
 *
 * Function will try to place VRAM at base address provided
 * as parameter.
 */
void amdgpu_device_vram_location(struct amdgpu_device *adev,
                                 struct amdgpu_gmc *mc, u64 base)
{
        uint64_t limit = (uint64_t)amdgpu_vram_limit << 20;

        mc->vram_start = base;
        mc->vram_end = mc->vram_start + mc->mc_vram_size - 1;
        if (limit && limit < mc->real_vram_size)
                mc->real_vram_size = limit;
        dev_info(adev->dev, "VRAM: %lluM 0x%016llX - 0x%016llX (%lluM used)\n",
                        mc->mc_vram_size >> 20, mc->vram_start,
                        mc->vram_end, mc->real_vram_size >> 20);
}

/**
 * amdgpu_device_gart_location - try to find GART location
 *
 * @adev: amdgpu device structure holding all necessary informations
 * @mc: memory controller structure holding memory informations
 *
 * Function will place try to place GART before or after VRAM.
 *
 * If GART size is bigger than space left then we ajust GART size.
 * Thus function will never fails.
 */
void amdgpu_device_gart_location(struct amdgpu_device *adev,
                                 struct amdgpu_gmc *mc)
{
        u64 size_af, size_bf;

        mc->gart_size += adev->pm.smu_prv_buffer_size;

        size_af = adev->gmc.mc_mask - mc->vram_end;
        size_bf = mc->vram_start;
        if (size_bf > size_af) {
                if (mc->gart_size > size_bf) {
                        dev_warn(adev->dev, "limiting GART\n");
                        mc->gart_size = size_bf;
                }
                mc->gart_start = 0;
        } else {
                if (mc->gart_size > size_af) {
                        dev_warn(adev->dev, "limiting GART\n");
                        mc->gart_size = size_af;
                }
                /* VCE doesn't like it when BOs cross a 4GB segment, so align
                 * the GART base on a 4GB boundary as well.
                 */
                mc->gart_start = ALIGN(mc->vram_end + 1, 0x100000000ULL);
        }
        mc->gart_end = mc->gart_start + mc->gart_size - 1;
        dev_info(adev->dev, "GART: %lluM 0x%016llX - 0x%016llX\n",
                        mc->gart_size >> 20, mc->gart_start, mc->gart_end);
}

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

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

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

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

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

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

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

        pci_release_resource(adev->pdev, 0);

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

        pci_assign_unassigned_bus_resources(adev->pdev->bus);

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

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

        return 0;
}

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

        if (amdgpu_sriov_vf(adev))
                return false;

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

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

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

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

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

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

        return true;
}

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

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

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

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

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

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

        if (amdgpu_smu_memory_pool_size == 0)
                return;

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

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

        return;

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

/**
 * amdgpu_device_check_arguments - validate module params
 *
 * @adev: amdgpu_device pointer
 *
 * Validates certain module parameters and updates
 * the associated values used by the driver (all asics).
 */
static void 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;
        }

        amdgpu_device_check_smu_prv_buffer_size(adev);

        amdgpu_device_check_vm_size(adev);

        amdgpu_device_check_block_size(adev);

        if (amdgpu_vram_page_split != -1 && (amdgpu_vram_page_split < 16 ||
            !is_power_of_2(amdgpu_vram_page_split))) {
                dev_warn(adev->dev, "invalid VRAM page split (%d)\n",
                         amdgpu_vram_page_split);
                amdgpu_vram_page_split = 1024;
        }

        if (amdgpu_lockup_timeout == 0) {
                dev_warn(adev->dev, "lockup_timeout msut be > 0, adjusting to 10000\n");
                amdgpu_lockup_timeout = 10000;
        }

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

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

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

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

                amdgpu_device_resume(dev, true, true);

                dev->switch_power_state = DRM_SWITCH_POWER_ON;
                drm_kms_helper_poll_enable(dev);
        } else {
                pr_info("amdgpu: switched off\n");
                drm_kms_helper_poll_disable(dev);
                dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
                amdgpu_device_suspend(dev, true, true);
                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 dev->open_count == 0;
}

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

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

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

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

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

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

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

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

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

}

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

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

}

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

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

        return NULL;
}

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

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

        return 1;
}

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

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

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

        return 0;
}

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

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

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

                                adev->enable_virtual_display = true;

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

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

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

                kfree(pciaddstr);
        }
}

/**
 * amdgpu_device_parse_gpu_info_fw - parse gpu info firmware
 *
 * @adev: amdgpu_device pointer
 *
 * Parses the asic configuration parameters specified in the gpu info
 * firmware and makes them availale to the driver for use in configuring
 * the asic.
 * Returns 0 on success, -EINVAL on failure.
 */
static int amdgpu_device_parse_gpu_info_fw(struct amdgpu_device *adev)
{
        const char *chip_name;
        char fw_name[30];
        int err;
        const struct gpu_info_firmware_header_v1_0 *hdr;

        adev->firmware.gpu_info_fw = NULL;

        switch (adev->asic_type) {
        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:
#ifdef CONFIG_DRM_AMDGPU_SI
        case CHIP_VERDE:
        case CHIP_TAHITI:
        case CHIP_PITCAIRN:
        case CHIP_OLAND:
        case CHIP_HAINAN:
#endif
#ifdef CONFIG_DRM_AMDGPU_CIK
        case CHIP_BONAIRE:
        case CHIP_HAWAII:
        case CHIP_KAVERI:
        case CHIP_KABINI:
        case CHIP_MULLINS:
#endif
        case CHIP_VEGA20:
        default:
                return 0;
        case CHIP_VEGA10:
                chip_name = "vega10";
                break;
        case CHIP_VEGA12:
                chip_name = "vega12";
                break;
        case CHIP_RAVEN:
                chip_name = "raven";
                break;
        }

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

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

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

                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);
                break;
        }
        default:
                dev_err(adev->dev,
                        "Unsupported gpu_info table %d\n", hdr->header.ucode_version);
                err = -EINVAL;
                goto out;
        }
out:
        return err;
}

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

        amdgpu_device_enable_virtual_display(adev);

        switch (adev->asic_type) {
        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->asic_type == CHIP_CARRIZO || adev->asic_type == CHIP_STONEY)
                        adev->family = AMDGPU_FAMILY_CZ;
                else
                        adev->family = AMDGPU_FAMILY_VI;

                r = vi_set_ip_blocks(adev);
                if (r)
                        return r;
                break;
#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->asic_type == CHIP_BONAIRE) || (adev->asic_type == CHIP_HAWAII))
                        adev->family = AMDGPU_FAMILY_CI;
                else
                        adev->family = AMDGPU_FAMILY_KV;

                r = cik_set_ip_blocks(adev);
                if (r)
                        return r;
                break;
#endif
        case CHIP_VEGA10:
        case CHIP_VEGA12:
        case CHIP_VEGA20:
        case CHIP_RAVEN:
                if (adev->asic_type == CHIP_RAVEN)
                        adev->family = AMDGPU_FAMILY_RV;
                else
                        adev->family = AMDGPU_FAMILY_AI;

                r = soc15_set_ip_blocks(adev);
                if (r)
                        return r;
                break;
        default:
                /* FIXME: not supported yet */
                return -EINVAL;
        }

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

        amdgpu_amdkfd_device_probe(adev);

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

        adev->powerplay.pp_feature = amdgpu_pp_feature_mask;

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

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

        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;

        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);
                        return r;
                }
                adev->ip_blocks[i].status.sw = true;

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

                        /* right after GMC hw init, we create CSA */
                        if (amdgpu_sriov_vf(adev)) {
                                r = amdgpu_allocate_static_csa(adev);
                                if (r) {
                                        DRM_ERROR("allocate CSA failed %d\n", r);
                                        return 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((void *)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;
        }

        amdgpu_amdkfd_device_init(adev);

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

        return 0;
}

/**
 * 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)
{
        return !!memcmp(adev->gart.ptr, adev->reset_magic,
                        AMDGPU_RESET_MAGIC_NUM);
}

/**
 * amdgpu_device_ip_late_set_cg_state - late init for clockgating
 *
 * @adev: amdgpu_device pointer
 *
 * Late initialization pass enabling clockgating for hardware IPs.
 * The list of all the hardware IPs that make up the asic is walked and the
 * set_clockgating_state callbacks are run.  This stage is run late
 * in the init process.
 * Returns 0 on success, negative error code on failure.
 */
static int amdgpu_device_ip_late_set_cg_state(struct amdgpu_device *adev)
{
        int i = 0, r;

        if (amdgpu_emu_mode == 1)
                return 0;

        for (i = 0; i < adev->num_ip_blocks; i++) {
                if (!adev->ip_blocks[i].status.valid)
                        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->funcs->set_clockgating_state) {
                        /* enable clockgating to save power */
                        r = adev->ip_blocks[i].version->funcs->set_clockgating_state((void *)adev,
                                                                                     AMD_CG_STATE_GATE);
                        if (r) {
                                DRM_ERROR("set_clockgating_state(gate) of IP block <%s> failed %d\n",
                                          adev->ip_blocks[i].version->funcs->name, r);
                                return r;
                        }
                }
        }

        return 0;
}

static int amdgpu_device_ip_late_set_pg_state(struct amdgpu_device *adev)
{
        int i = 0, r;

        if (amdgpu_emu_mode == 1)
                return 0;

        for (i = 0; i < adev->num_ip_blocks; i++) {
                if (!adev->ip_blocks[i].status.valid)
                        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->funcs->set_powergating_state) {
                        /* enable powergating to save power */
                        r = adev->ip_blocks[i].version->funcs->set_powergating_state((void *)adev,
                                                                                     AMD_PG_STATE_GATE);
                        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;
}

/**
 * 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)
{
        int i = 0, r;

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

        amdgpu_device_ip_late_set_cg_state(adev);
        amdgpu_device_ip_late_set_pg_state(adev);

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

        amdgpu_device_fill_reset_magic(adev);

        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;

        amdgpu_amdkfd_device_fini(adev);
        /* need to disable SMC first */
        for (i = 0; i < adev->num_ip_blocks; i++) {
                if (!adev->ip_blocks[i].status.hw)
                        continue;
                if (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_SMC &&
                        adev->ip_blocks[i].version->funcs->set_clockgating_state) {
                        /* ungate blocks before hw fini so that we can shutdown the blocks safely */
                        r = adev->ip_blocks[i].version->funcs->set_clockgating_state((void *)adev,
                                                                                     AMD_CG_STATE_UNGATE);
                        if (r) {
                                DRM_ERROR("set_clockgating_state(ungate) of IP block <%s> failed %d\n",
                                          adev->ip_blocks[i].version->funcs->name, r);
                                return r;
                        }
                        if (adev->powerplay.pp_funcs->set_powergating_by_smu)
                                amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_GFX, false);
                        r = adev->ip_blocks[i].version->funcs->hw_fini((void *)adev);
                        /* XXX handle errors */
                        if (r) {
                                DRM_DEBUG("hw_fini of IP block <%s> failed %d\n",
                                          adev->ip_blocks[i].version->funcs->name, r);
                        }
                        adev->ip_blocks[i].status.hw = false;
                        break;
                }
        }

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

                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->funcs->set_clockgating_state) {
                        /* ungate blocks before hw fini so that we can shutdown the blocks safely */
                        r = adev->ip_blocks[i].version->funcs->set_clockgating_state((void *)adev,
                                                                                     AMD_CG_STATE_UNGATE);
                        if (r) {
                                DRM_ERROR("set_clockgating_state(ungate) of IP block <%s> failed %d\n",
                                          adev->ip_blocks[i].version->funcs->name, r);
                                return r;
                        }
                }

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

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


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

                if (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_GMC) {
                        amdgpu_free_static_csa(adev);
                        amdgpu_device_wb_fini(adev);
                        amdgpu_device_vram_scratch_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;
        }

        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_late_init_func_handler - work handler for clockgating
 *
 * @work: work_struct
 *
 * Work handler for amdgpu_device_ip_late_set_cg_state.  We put the
 * clockgating setup into a worker thread to speed up driver init and
 * resume from suspend.
 */
static void amdgpu_device_ip_late_init_func_handler(struct work_struct *work)
{
        struct amdgpu_device *adev =
                container_of(work, struct amdgpu_device, late_init_work.work);
        int r;

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

/**
 * 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 i, r;

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

        /* ungate SMC block first */
        r = amdgpu_device_ip_set_clockgating_state(adev, AMD_IP_BLOCK_TYPE_SMC,
                                                   AMD_CG_STATE_UNGATE);
        if (r) {
                DRM_ERROR("set_clockgating_state(ungate) SMC failed %d\n", r);
        }

        /* call smu to disable gfx off feature first when suspend */
        if (adev->powerplay.pp_funcs->set_powergating_by_smu)
                amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_GFX, false);

        for (i = adev->num_ip_blocks - 1; i >= 0; i--) {
                if (!adev->ip_blocks[i].status.valid)
                        continue;
                /* ungate blocks so that suspend can properly shut them down */
                if (adev->ip_blocks[i].version->type != AMD_IP_BLOCK_TYPE_SMC &&
                        adev->ip_blocks[i].version->funcs->set_clockgating_state) {
                        r = adev->ip_blocks[i].version->funcs->set_clockgating_state((void *)adev,
                                                                                     AMD_CG_STATE_UNGATE);
                        if (r) {
                                DRM_ERROR("set_clockgating_state(ungate) of IP block <%s> failed %d\n",
                                          adev->ip_blocks[i].version->funcs->name, r);
                        }
                }
                /* 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);
                }
        }

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

        return 0;
}

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

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

        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)
                                continue;

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

        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_PSP,
                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
        };

        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)
                                continue;

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

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

        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)
                        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)
                        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;
                }
        }

        return 0;
}

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

        r = amdgpu_device_ip_resume_phase1(adev);
        if (r)
                return r;
        r = amdgpu_device_ip_resume_phase2(adev);

        return r;
}

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

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

/**
 * amdgpu_device_asic_has_dc_support - determine if DC supports the asic
 *
 * @asic_type: AMD asic type
 *
 * Check if there is DC (new modesetting infrastructre) support for an asic.
 * returns true if DC has support, false if not.
 */
bool amdgpu_device_asic_has_dc_support(enum amd_asic_type asic_type)
{
        switch (asic_type) {
#if defined(CONFIG_DRM_AMD_DC)
        case CHIP_BONAIRE:
        case CHIP_KAVERI:
        case CHIP_KABINI:
        case CHIP_MULLINS:
                /*
                 * We have systems in the wild with these ASICs that require
                 * LVDS and VGA support which is not supported with DC.
                 *
                 * Fallback to the non-DC driver here by default so as not to
                 * cause regressions.
                 */
                return amdgpu_dc > 0;
        case CHIP_HAWAII:
        case CHIP_CARRIZO:
        case CHIP_STONEY:
        case CHIP_POLARIS10:
        case CHIP_POLARIS11:
        case CHIP_POLARIS12:
        case CHIP_VEGAM:
        case CHIP_TONGA:
        case CHIP_FIJI:
        case CHIP_VEGA10:
        case CHIP_VEGA12:
        case CHIP_VEGA20:
#ifdef CONFIG_X86
        case CHIP_RAVEN:
#endif
                return amdgpu_dc != 0;
#endif
        default:
                return false;
        }
}

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

        return amdgpu_device_asic_has_dc_support(adev->asic_type);
}

/**
 * amdgpu_device_init - initialize the driver
 *
 * @adev: amdgpu_device pointer
 * @ddev: drm dev pointer
 * @pdev: pci dev 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,
                       struct drm_device *ddev,
                       struct pci_dev *pdev,
                       uint32_t flags)
{
        int r, i;
        bool runtime = false;
        u32 max_MBps;

        adev->shutdown = false;
        adev->dev = &pdev->dev;
        adev->ddev = ddev;
        adev->pdev = pdev;
        adev->flags = flags;
        adev->asic_type = flags & AMD_ASIC_MASK;
        adev->usec_timeout = AMDGPU_MAX_USEC_TIMEOUT;
        if (amdgpu_emu_mode == 1)
                adev->usec_timeout *= 2;
        adev->gmc.gart_size = 512 * 1024 * 1024;
        adev->accel_working = false;
        adev->num_rings = 0;
        adev->mman.buffer_funcs = NULL;
        adev->mman.buffer_funcs_ring = NULL;
        adev->vm_manager.vm_pte_funcs = NULL;
        adev->vm_manager.vm_pte_num_rings = 0;
        adev->gmc.gmc_funcs = NULL;
        adev->fence_context = dma_fence_context_alloc(AMDGPU_MAX_RINGS);
        bitmap_zero(adev->gfx.pipe_reserve_bitmap, AMDGPU_MAX_COMPUTE_QUEUES);

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

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

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

        amdgpu_device_check_arguments(adev);

        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->ring_lru_list);
        spin_lock_init(&adev->ring_lru_list_lock);

        INIT_DELAYED_WORK(&adev->late_init_work,
                          amdgpu_device_ip_late_init_func_handler);

        adev->pm.ac_power = power_supply_is_system_supplied() > 0 ? true : false;

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

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

        /* doorbell bar mapping */
        amdgpu_device_doorbell_init(adev);

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

        amdgpu_device_get_pcie_info(adev);

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

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

        if (amdgpu_device_is_px(ddev))
                runtime = true;
        if (!pci_is_thunderbolt_attached(adev->pdev))
                vga_switcheroo_register_client(adev->pdev,
                                               &amdgpu_switcheroo_ops, runtime);
        if (runtime)
                vga_switcheroo_init_domain_pm_ops(adev->dev, &adev->vga_pm_domain);

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

        /* Read BIOS */
        if (!amdgpu_get_bios(adev)) {
                r = -EINVAL;
                goto failed;
        }

        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);
                goto failed;
        }

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

        /* 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_atom_asic_init(adev->mode_info.atom_context);
                if (r) {
                        dev_err(adev->dev, "gpu post error!\n");
                        goto failed;
                }
        }

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

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

        /* init the mode config */
        drm_mode_config_init(adev->ddev);

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

        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_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 failed;
        }

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

        amdgpu_fbdev_init(adev);

        r = amdgpu_pm_sysfs_init(adev);
        if (r)
                DRM_ERROR("registering pm debugfs failed (%d).\n", r);

        r = amdgpu_debugfs_gem_init(adev);
        if (r)
                DRM_ERROR("registering gem debugfs failed (%d).\n", r);

        r = amdgpu_debugfs_regs_init(adev);
        if (r)
                DRM_ERROR("registering register debugfs failed (%d).\n", r);

        r = amdgpu_debugfs_firmware_init(adev);
        if (r)
                DRM_ERROR("registering firmware debugfs failed (%d).\n", r);

        r = amdgpu_debugfs_init(adev);
        if (r)
                DRM_ERROR("Creating debugfs files failed (%d).\n", r);

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

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

        return 0;

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

        return r;
}

/**
 * amdgpu_device_fini - tear down the driver
 *
 * @adev: amdgpu_device pointer
 *
 * Tear down the driver info (all asics).
 * Called at driver shutdown.
 */
void amdgpu_device_fini(struct amdgpu_device *adev)
{
        int r;

        DRM_INFO("amdgpu: finishing device.\n");
        adev->shutdown = true;
        /* disable all interrupts */
        amdgpu_irq_disable_all(adev);
        if (adev->mode_info.mode_config_initialized){
                if (!amdgpu_device_has_dc_support(adev))
                        drm_crtc_force_disable_all(adev->ddev);
                else
                        drm_atomic_helper_shutdown(adev->ddev);
        }
        amdgpu_ib_pool_fini(adev);
        amdgpu_fence_driver_fini(adev);
        amdgpu_pm_sysfs_fini(adev);
        amdgpu_fbdev_fini(adev);
        r = amdgpu_device_ip_fini(adev);
        if (adev->firmware.gpu_info_fw) {
                release_firmware(adev->firmware.gpu_info_fw);
                adev->firmware.gpu_info_fw = NULL;
        }
        adev->accel_working = false;
        cancel_delayed_work_sync(&adev->late_init_work);
        /* 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 (!pci_is_thunderbolt_attached(adev->pdev))
                vga_switcheroo_unregister_client(adev->pdev);
        if (adev->flags & AMD_IS_PX)
                vga_switcheroo_fini_domain_pm_ops(adev->dev);
        vga_client_register(adev->pdev, NULL, NULL, NULL);
        if (adev->rio_mem)
                pci_iounmap(adev->pdev, adev->rio_mem);
        adev->rio_mem = NULL;
        iounmap(adev->rmmio);
        adev->rmmio = NULL;
        amdgpu_device_doorbell_fini(adev);
        amdgpu_debugfs_regs_cleanup(adev);
}


/*
 * Suspend & resume.
 */
/**
 * amdgpu_device_suspend - initiate device suspend
 *
 * @dev: drm dev pointer
 * @suspend: suspend state
 * @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 suspend, bool fbcon)
{
        struct amdgpu_device *adev;
        struct drm_crtc *crtc;
        struct drm_connector *connector;
        int r;

        if (dev == NULL || dev->dev_private == NULL) {
                return -ENODEV;
        }

        adev = dev->dev_private;

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

        drm_kms_helper_poll_disable(dev);

        if (!amdgpu_device_has_dc_support(adev)) {
                /* turn off display hw */
                drm_modeset_lock_all(dev);
                list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
                        drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
                }
                drm_modeset_unlock_all(dev);
        }

        amdgpu_amdkfd_suspend(adev);

        /* unpin the front buffers and cursors */
        list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
                struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
                struct drm_framebuffer *fb = crtc->primary->fb;
                struct amdgpu_bo *robj;

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

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

        amdgpu_fence_driver_suspend(adev);

        r = amdgpu_device_ip_suspend(adev);

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

        pci_save_state(dev->pdev);
        if (suspend) {
                /* Shut down the device */
                pci_disable_device(dev->pdev);
                pci_set_power_state(dev->pdev, PCI_D3hot);
        } else {
                r = amdgpu_asic_reset(adev);
                if (r)
                        DRM_ERROR("amdgpu asic reset failed\n");
        }

        if (fbcon) {
                console_lock();
                amdgpu_fbdev_set_suspend(adev, 1);
                console_unlock();
        }
        return 0;
}

/**
 * amdgpu_device_resume - initiate device resume
 *
 * @dev: drm dev pointer
 * @resume: resume state
 * @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 resume, bool fbcon)
{
        struct drm_connector *connector;
        struct amdgpu_device *adev = dev->dev_private;
        struct drm_crtc *crtc;
        int r = 0;

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

        if (fbcon)
                console_lock();

        if (resume) {
                pci_set_power_state(dev->pdev, PCI_D0);
                pci_restore_state(dev->pdev);
                r = pci_enable_device(dev->pdev);
                if (r)
                        goto unlock;
        }

        /* post card */
        if (amdgpu_device_need_post(adev)) {
                r = amdgpu_atom_asic_init(adev->mode_info.atom_context);
                if (r)
                        DRM_ERROR("amdgpu asic init failed\n");
        }

        r = amdgpu_device_ip_resume(adev);
        if (r) {
                DRM_ERROR("amdgpu_device_ip_resume failed (%d).\n", r);
                goto unlock;
        }
        amdgpu_fence_driver_resume(adev);


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

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

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

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

                        /* turn on display hw */
                        drm_modeset_lock_all(dev);
                        list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
                                drm_helper_connector_dpms(connector, DRM_MODE_DPMS_ON);
                        }
                        drm_modeset_unlock_all(dev);
                }
        }

        drm_kms_helper_poll_enable(dev);

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

        if (fbcon)
                amdgpu_fbdev_set_suspend(adev, 0);

unlock:
        if (fbcon)
                console_unlock();

        return r;
}

/**
 * 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) {
                        DRM_INFO("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) {
                                DRM_INFO("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_from_shadow - restore shadowed VRAM buffers
 *
 * @adev: amdgpu_device pointer
 * @ring: amdgpu_ring for the engine handling the buffer operations
 * @bo: amdgpu_bo buffer whose shadow is being restored
 * @fence: dma_fence associated with the operation
 *
 * Restores the VRAM buffer contents from the shadow 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_from_shadow(struct amdgpu_device *adev,
                                                  struct amdgpu_ring *ring,
                                                  struct amdgpu_bo *bo,
                                                  struct dma_fence **fence)
{
        uint32_t domain;
        int r;

        if (!bo->shadow)
                return 0;

        r = amdgpu_bo_reserve(bo, true);
        if (r)
                return r;
        domain = amdgpu_mem_type_to_domain(bo->tbo.mem.mem_type);
        /* if bo has been evicted, then no need to recover */
        if (domain == AMDGPU_GEM_DOMAIN_VRAM) {
                r = amdgpu_bo_validate(bo->shadow);
                if (r) {
                        DRM_ERROR("bo validate failed!\n");
                        goto err;
                }

                r = amdgpu_bo_restore_from_shadow(adev, ring, bo,
                                                 NULL, fence, true);
                if (r) {
                        DRM_ERROR("recover page table failed!\n");
                        goto err;
                }
        }
err:
        amdgpu_bo_unreserve(bo);
        return r;
}

/**
 * amdgpu_device_handle_vram_lost - Handle the loss of 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, 1 on failure.
 */
static int amdgpu_device_handle_vram_lost(struct amdgpu_device *adev)
{
        struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring;
        struct amdgpu_bo *bo, *tmp;
        struct dma_fence *fence = NULL, *next = NULL;
        long r = 1;
        int i = 0;
        long tmo;

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

        DRM_INFO("recover vram bo from shadow start\n");
        mutex_lock(&adev->shadow_list_lock);
        list_for_each_entry_safe(bo, tmp, &adev->shadow_list, shadow_list) {
                next = NULL;
                amdgpu_device_recover_vram_from_shadow(adev, ring, bo, &next);
                if (fence) {
                        r = dma_fence_wait_timeout(fence, false, tmo);
                        if (r == 0)
                                pr_err("wait fence %p[%d] timeout\n", fence, i);
                        else if (r < 0)
                                pr_err("wait fence %p[%d] interrupted\n", fence, i);
                        if (r < 1) {
                                dma_fence_put(fence);
                                fence = next;
                                break;
                        }
                        i++;
                }

                dma_fence_put(fence);
                fence = next;
        }
        mutex_unlock(&adev->shadow_list_lock);

        if (fence) {
                r = dma_fence_wait_timeout(fence, false, tmo);
                if (r == 0)
                        pr_err("wait fence %p[%d] timeout\n", fence, i);
                else if (r < 0)
                        pr_err("wait fence %p[%d] interrupted\n", fence, i);

        }
        dma_fence_put(fence);

        if (r > 0)
                DRM_INFO("recover vram bo from shadow done\n");
        else
                DRM_ERROR("recover vram bo from shadow failed\n");

        return (r > 0) ? 0 : 1;
}

/**
 * amdgpu_device_reset - reset ASIC/GPU for bare-metal or passthrough
 *
 * @adev: amdgpu device pointer
 *
 * attempt to do soft-reset or full-reset and reinitialize Asic
 * return 0 means successed otherwise failed
 */
static int amdgpu_device_reset(struct amdgpu_device *adev)
{
        bool need_full_reset, vram_lost = 0;
        int r;

        need_full_reset = amdgpu_device_ip_need_full_reset(adev);

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

        if (need_full_reset) {
                r = amdgpu_device_ip_suspend(adev);

retry:
                r = amdgpu_asic_reset(adev);
                /* post card */
                amdgpu_atom_asic_init(adev->mode_info.atom_context);

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

                        vram_lost = amdgpu_device_check_vram_lost(adev);
                        if (vram_lost) {
                                DRM_ERROR("VRAM is lost!\n");
                                atomic_inc(&adev->vram_lost_counter);
                        }

                        r = amdgpu_gtt_mgr_recover(
                                &adev->mman.bdev.man[TTM_PL_TT]);
                        if (r)
                                goto out;

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

                        if (vram_lost)
                                amdgpu_device_fill_reset_magic(adev);
                }
        }

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

        if (!r && ((need_full_reset && !(adev->flags & AMD_IS_APU)) || vram_lost))
                r = amdgpu_device_handle_vram_lost(adev);

        return r;
}

/**
 * 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 successed otherwise failed
 */
static int amdgpu_device_reset_sriov(struct amdgpu_device *adev,
                                     bool from_hypervisor)
{
        int r;

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

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

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

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

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

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

        return r;
}

/**
 * amdgpu_device_gpu_recover - reset the asic and recover scheduler
 *
 * @adev: amdgpu device pointer
 * @job: which job trigger hang
 * @force: forces reset regardless of amdgpu_gpu_recovery
 *
 * Attempt to reset the GPU if it has hung (all asics).
 * Returns 0 for success or an error on failure.
 */
int amdgpu_device_gpu_recover(struct amdgpu_device *adev,
                              struct amdgpu_job *job, bool force)
{
        int i, r, resched;

        if (!force && !amdgpu_device_ip_check_soft_reset(adev)) {
                DRM_INFO("No hardware hang detected. Did some blocks stall?\n");
                return 0;
        }

        if (!force && (amdgpu_gpu_recovery == 0 ||
                        (amdgpu_gpu_recovery == -1  && !amdgpu_sriov_vf(adev)))) {
                DRM_INFO("GPU recovery disabled.\n");
                return 0;
        }

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

        mutex_lock(&adev->lock_reset);
        atomic_inc(&adev->gpu_reset_counter);
        adev->in_gpu_reset = 1;

        /* block TTM */
        resched = ttm_bo_lock_delayed_workqueue(&adev->mman.bdev);

        /* 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;

                kthread_park(ring->sched.thread);

                if (job && job->base.sched == &ring->sched)
                        continue;

                drm_sched_hw_job_reset(&ring->sched, &job->base);

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

        if (amdgpu_sriov_vf(adev))
                r = amdgpu_device_reset_sriov(adev, job ? false : true);
        else
                r = amdgpu_device_reset(adev);

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

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

                /* only need recovery sched of the given job's ring
                 * or all rings (in the case @job is NULL)
                 * after above amdgpu_reset accomplished
                 */
                if ((!job || job->base.sched == &ring->sched) && !r)
                        drm_sched_job_recovery(&ring->sched);

                kthread_unpark(ring->sched.thread);
        }

        if (!amdgpu_device_has_dc_support(adev)) {
                drm_helper_resume_force_mode(adev->ddev);
        }

        ttm_bo_unlock_delayed_workqueue(&adev->mman.bdev, resched);

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

        amdgpu_vf_error_trans_all(adev);
        adev->in_gpu_reset = 0;
        mutex_unlock(&adev->lock_reset);
        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;
        enum pcie_link_width 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 == 0) {
                /* asic caps */
                pdev = adev->pdev;
                speed_cap = pcie_get_speed_cap(pdev);
                if (speed_cap == PCI_SPEED_UNKNOWN) {
                        adev->pm.pcie_gen_mask |= (CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN1 |
                                                  CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN2 |
                                                  CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN3);
                } else {
                        if (speed_cap == PCIE_SPEED_16_0GT)
                                adev->pm.pcie_gen_mask |= (CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN1 |
                                                          CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN2 |
                                                          CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN3 |
                                                          CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN4);
                        else if (speed_cap == PCIE_SPEED_8_0GT)
                                adev->pm.pcie_gen_mask |= (CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN1 |
                                                          CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN2 |
                                                          CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN3);
                        else if (speed_cap == PCIE_SPEED_5_0GT)
                                adev->pm.pcie_gen_mask |= (CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN1 |
                                                          CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN2);
                        else
                                adev->pm.pcie_gen_mask |= CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN1;
                }
                /* platform caps */
                pdev = adev->ddev->pdev->bus->self;
                speed_cap = pcie_get_speed_cap(pdev);
                if (speed_cap == PCI_SPEED_UNKNOWN) {
                        adev->pm.pcie_gen_mask |= (CAIL_PCIE_LINK_SPEED_SUPPORT_GEN1 |
                                                   CAIL_PCIE_LINK_SPEED_SUPPORT_GEN2);
                } else {
                        if (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 (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 (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) {
                pdev = adev->ddev->pdev->bus->self;
                link_width = pcie_get_width_cap(pdev);
                if (link_width == PCIE_LNK_WIDTH_UNKNOWN) {
                        adev->pm.pcie_mlw_mask |= AMDGPU_DEFAULT_PCIE_MLW_MASK;
                } else {
                        switch (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;
                        }
                }
        }
}