Don't reset ->total_link_count on nested calls of vfs_path_lookup()

[people/ms/linux.git] / drivers / gpu / drm / amd / amdgpu / gmc_v7_0.c

/*
 * Copyright 2014 Advanced Micro Devices, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 */
#include <linux/firmware.h>
#include "drmP.h"
#include "amdgpu.h"
#include "cikd.h"
#include "cik.h"
#include "gmc_v7_0.h"
#include "amdgpu_ucode.h"

#include "bif/bif_4_1_d.h"
#include "bif/bif_4_1_sh_mask.h"

#include "gmc/gmc_7_1_d.h"
#include "gmc/gmc_7_1_sh_mask.h"

#include "oss/oss_2_0_d.h"
#include "oss/oss_2_0_sh_mask.h"

static void gmc_v7_0_set_gart_funcs(struct amdgpu_device *adev);
static void gmc_v7_0_set_irq_funcs(struct amdgpu_device *adev);

MODULE_FIRMWARE("radeon/bonaire_mc.bin");
MODULE_FIRMWARE("radeon/hawaii_mc.bin");

/**
 * gmc8_mc_wait_for_idle - wait for MC idle callback.
 *
 * @adev: amdgpu_device pointer
 *
 * Wait for the MC (memory controller) to be idle.
 * (evergreen+).
 * Returns 0 if the MC is idle, -1 if not.
 */
int gmc_v7_0_mc_wait_for_idle(struct amdgpu_device *adev)
{
        unsigned i;
        u32 tmp;

        for (i = 0; i < adev->usec_timeout; i++) {
                /* read MC_STATUS */
                tmp = RREG32(mmSRBM_STATUS) & 0x1F00;
                if (!tmp)
                        return 0;
                udelay(1);
        }
        return -1;
}

void gmc_v7_0_mc_stop(struct amdgpu_device *adev,
                      struct amdgpu_mode_mc_save *save)
{
        u32 blackout;

        if (adev->mode_info.num_crtc)
                amdgpu_display_stop_mc_access(adev, save);

        amdgpu_asic_wait_for_mc_idle(adev);

        blackout = RREG32(mmMC_SHARED_BLACKOUT_CNTL);
        if (REG_GET_FIELD(blackout, MC_SHARED_BLACKOUT_CNTL, BLACKOUT_MODE) != 1) {
                /* Block CPU access */
                WREG32(mmBIF_FB_EN, 0);
                /* blackout the MC */
                blackout = REG_SET_FIELD(blackout,
                                         MC_SHARED_BLACKOUT_CNTL, BLACKOUT_MODE, 0);
                WREG32(mmMC_SHARED_BLACKOUT_CNTL, blackout | 1);
        }
        /* wait for the MC to settle */
        udelay(100);
}

void gmc_v7_0_mc_resume(struct amdgpu_device *adev,
                        struct amdgpu_mode_mc_save *save)
{
        u32 tmp;

        /* unblackout the MC */
        tmp = RREG32(mmMC_SHARED_BLACKOUT_CNTL);
        tmp = REG_SET_FIELD(tmp, MC_SHARED_BLACKOUT_CNTL, BLACKOUT_MODE, 0);
        WREG32(mmMC_SHARED_BLACKOUT_CNTL, tmp);
        /* allow CPU access */
        tmp = REG_SET_FIELD(0, BIF_FB_EN, FB_READ_EN, 1);
        tmp = REG_SET_FIELD(tmp, BIF_FB_EN, FB_WRITE_EN, 1);
        WREG32(mmBIF_FB_EN, tmp);

        if (adev->mode_info.num_crtc)
                amdgpu_display_resume_mc_access(adev, save);
}

/**
 * gmc_v7_0_init_microcode - load ucode images from disk
 *
 * @adev: amdgpu_device pointer
 *
 * Use the firmware interface to load the ucode images into
 * the driver (not loaded into hw).
 * Returns 0 on success, error on failure.
 */
static int gmc_v7_0_init_microcode(struct amdgpu_device *adev)
{
        const char *chip_name;
        char fw_name[30];
        int err;

        DRM_DEBUG("\n");

        switch (adev->asic_type) {
        case CHIP_BONAIRE:
                chip_name = "bonaire";
                break;
        case CHIP_HAWAII:
                chip_name = "hawaii";
                break;
        case CHIP_KAVERI:
        case CHIP_KABINI:
                return 0;
        default: BUG();
        }

        snprintf(fw_name, sizeof(fw_name), "radeon/%s_mc.bin", chip_name);
        err = request_firmware(&adev->mc.fw, fw_name, adev->dev);
        if (err)
                goto out;
        err = amdgpu_ucode_validate(adev->mc.fw);

out:
        if (err) {
                printk(KERN_ERR
                       "cik_mc: Failed to load firmware \"%s\"\n",
                       fw_name);
                release_firmware(adev->mc.fw);
                adev->mc.fw = NULL;
        }
        return err;
}

/**
 * gmc_v7_0_mc_load_microcode - load MC ucode into the hw
 *
 * @adev: amdgpu_device pointer
 *
 * Load the GDDR MC ucode into the hw (CIK).
 * Returns 0 on success, error on failure.
 */
static int gmc_v7_0_mc_load_microcode(struct amdgpu_device *adev)
{
        const struct mc_firmware_header_v1_0 *hdr;
        const __le32 *fw_data = NULL;
        const __le32 *io_mc_regs = NULL;
        u32 running, blackout = 0;
        int i, ucode_size, regs_size;

        if (!adev->mc.fw)
                return -EINVAL;

        hdr = (const struct mc_firmware_header_v1_0 *)adev->mc.fw->data;
        amdgpu_ucode_print_mc_hdr(&hdr->header);

        adev->mc.fw_version = le32_to_cpu(hdr->header.ucode_version);
        regs_size = le32_to_cpu(hdr->io_debug_size_bytes) / (4 * 2);
        io_mc_regs = (const __le32 *)
                (adev->mc.fw->data + le32_to_cpu(hdr->io_debug_array_offset_bytes));
        ucode_size = le32_to_cpu(hdr->header.ucode_size_bytes) / 4;
        fw_data = (const __le32 *)
                (adev->mc.fw->data + le32_to_cpu(hdr->header.ucode_array_offset_bytes));

        running = REG_GET_FIELD(RREG32(mmMC_SEQ_SUP_CNTL), MC_SEQ_SUP_CNTL, RUN);

        if (running == 0) {
                if (running) {
                        blackout = RREG32(mmMC_SHARED_BLACKOUT_CNTL);
                        WREG32(mmMC_SHARED_BLACKOUT_CNTL, blackout | 1);
                }

                /* reset the engine and set to writable */
                WREG32(mmMC_SEQ_SUP_CNTL, 0x00000008);
                WREG32(mmMC_SEQ_SUP_CNTL, 0x00000010);

                /* load mc io regs */
                for (i = 0; i < regs_size; i++) {
                        WREG32(mmMC_SEQ_IO_DEBUG_INDEX, le32_to_cpup(io_mc_regs++));
                        WREG32(mmMC_SEQ_IO_DEBUG_DATA, le32_to_cpup(io_mc_regs++));
                }
                /* load the MC ucode */
                for (i = 0; i < ucode_size; i++)
                        WREG32(mmMC_SEQ_SUP_PGM, le32_to_cpup(fw_data++));

                /* put the engine back into the active state */
                WREG32(mmMC_SEQ_SUP_CNTL, 0x00000008);
                WREG32(mmMC_SEQ_SUP_CNTL, 0x00000004);
                WREG32(mmMC_SEQ_SUP_CNTL, 0x00000001);

                /* wait for training to complete */
                for (i = 0; i < adev->usec_timeout; i++) {
                        if (REG_GET_FIELD(RREG32(mmMC_SEQ_TRAIN_WAKEUP_CNTL),
                                          MC_SEQ_TRAIN_WAKEUP_CNTL, TRAIN_DONE_D0))
                                break;
                        udelay(1);
                }
                for (i = 0; i < adev->usec_timeout; i++) {
                        if (REG_GET_FIELD(RREG32(mmMC_SEQ_TRAIN_WAKEUP_CNTL),
                                          MC_SEQ_TRAIN_WAKEUP_CNTL, TRAIN_DONE_D1))
                                break;
                        udelay(1);
                }

                if (running)
                        WREG32(mmMC_SHARED_BLACKOUT_CNTL, blackout);
        }

        return 0;
}

static void gmc_v7_0_vram_gtt_location(struct amdgpu_device *adev,
                                       struct amdgpu_mc *mc)
{
        if (mc->mc_vram_size > 0xFFC0000000ULL) {
                /* leave room for at least 1024M GTT */
                dev_warn(adev->dev, "limiting VRAM\n");
                mc->real_vram_size = 0xFFC0000000ULL;
                mc->mc_vram_size = 0xFFC0000000ULL;
        }
        amdgpu_vram_location(adev, &adev->mc, 0);
        adev->mc.gtt_base_align = 0;
        amdgpu_gtt_location(adev, mc);
}

/**
 * gmc_v7_0_mc_program - program the GPU memory controller
 *
 * @adev: amdgpu_device pointer
 *
 * Set the location of vram, gart, and AGP in the GPU's
 * physical address space (CIK).
 */
static void gmc_v7_0_mc_program(struct amdgpu_device *adev)
{
        struct amdgpu_mode_mc_save save;
        u32 tmp;
        int i, j;

        /* Initialize HDP */
        for (i = 0, j = 0; i < 32; i++, j += 0x6) {
                WREG32((0xb05 + j), 0x00000000);
                WREG32((0xb06 + j), 0x00000000);
                WREG32((0xb07 + j), 0x00000000);
                WREG32((0xb08 + j), 0x00000000);
                WREG32((0xb09 + j), 0x00000000);
        }
        WREG32(mmHDP_REG_COHERENCY_FLUSH_CNTL, 0);

        if (adev->mode_info.num_crtc)
                amdgpu_display_set_vga_render_state(adev, false);

        gmc_v7_0_mc_stop(adev, &save);
        if (amdgpu_asic_wait_for_mc_idle(adev)) {
                dev_warn(adev->dev, "Wait for MC idle timedout !\n");
        }
        /* Update configuration */
        WREG32(mmMC_VM_SYSTEM_APERTURE_LOW_ADDR,
               adev->mc.vram_start >> 12);
        WREG32(mmMC_VM_SYSTEM_APERTURE_HIGH_ADDR,
               adev->mc.vram_end >> 12);
        WREG32(mmMC_VM_SYSTEM_APERTURE_DEFAULT_ADDR,
               adev->vram_scratch.gpu_addr >> 12);
        tmp = ((adev->mc.vram_end >> 24) & 0xFFFF) << 16;
        tmp |= ((adev->mc.vram_start >> 24) & 0xFFFF);
        WREG32(mmMC_VM_FB_LOCATION, tmp);
        /* XXX double check these! */
        WREG32(mmHDP_NONSURFACE_BASE, (adev->mc.vram_start >> 8));
        WREG32(mmHDP_NONSURFACE_INFO, (2 << 7) | (1 << 30));
        WREG32(mmHDP_NONSURFACE_SIZE, 0x3FFFFFFF);
        WREG32(mmMC_VM_AGP_BASE, 0);
        WREG32(mmMC_VM_AGP_TOP, 0x0FFFFFFF);
        WREG32(mmMC_VM_AGP_BOT, 0x0FFFFFFF);
        if (amdgpu_asic_wait_for_mc_idle(adev)) {
                dev_warn(adev->dev, "Wait for MC idle timedout !\n");
        }
        gmc_v7_0_mc_resume(adev, &save);

        WREG32(mmBIF_FB_EN, BIF_FB_EN__FB_READ_EN_MASK | BIF_FB_EN__FB_WRITE_EN_MASK);

        tmp = RREG32(mmHDP_MISC_CNTL);
        tmp = REG_SET_FIELD(tmp, HDP_MISC_CNTL, FLUSH_INVALIDATE_CACHE, 1);
        WREG32(mmHDP_MISC_CNTL, tmp);

        tmp = RREG32(mmHDP_HOST_PATH_CNTL);
        WREG32(mmHDP_HOST_PATH_CNTL, tmp);
}

/**
 * gmc_v7_0_mc_init - initialize the memory controller driver params
 *
 * @adev: amdgpu_device pointer
 *
 * Look up the amount of vram, vram width, and decide how to place
 * vram and gart within the GPU's physical address space (CIK).
 * Returns 0 for success.
 */
static int gmc_v7_0_mc_init(struct amdgpu_device *adev)
{
        u32 tmp;
        int chansize, numchan;

        /* Get VRAM informations */
        tmp = RREG32(mmMC_ARB_RAMCFG);
        if (REG_GET_FIELD(tmp, MC_ARB_RAMCFG, CHANSIZE)) {
                chansize = 64;
        } else {
                chansize = 32;
        }
        tmp = RREG32(mmMC_SHARED_CHMAP);
        switch (REG_GET_FIELD(tmp, MC_SHARED_CHMAP, NOOFCHAN)) {
        case 0:
        default:
                numchan = 1;
                break;
        case 1:
                numchan = 2;
                break;
        case 2:
                numchan = 4;
                break;
        case 3:
                numchan = 8;
                break;
        case 4:
                numchan = 3;
                break;
        case 5:
                numchan = 6;
                break;
        case 6:
                numchan = 10;
                break;
        case 7:
                numchan = 12;
                break;
        case 8:
                numchan = 16;
                break;
        }
        adev->mc.vram_width = numchan * chansize;
        /* Could aper size report 0 ? */
        adev->mc.aper_base = pci_resource_start(adev->pdev, 0);
        adev->mc.aper_size = pci_resource_len(adev->pdev, 0);
        /* size in MB on si */
        adev->mc.mc_vram_size = RREG32(mmCONFIG_MEMSIZE) * 1024ULL * 1024ULL;
        adev->mc.real_vram_size = RREG32(mmCONFIG_MEMSIZE) * 1024ULL * 1024ULL;
        adev->mc.visible_vram_size = adev->mc.aper_size;

        /* unless the user had overridden it, set the gart
         * size equal to the 1024 or vram, whichever is larger.
         */
        if (amdgpu_gart_size == -1)
                adev->mc.gtt_size = max((1024ULL << 20), adev->mc.mc_vram_size);
        else
                adev->mc.gtt_size = (uint64_t)amdgpu_gart_size << 20;

        gmc_v7_0_vram_gtt_location(adev, &adev->mc);

        return 0;
}

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

/**
 * gmc_v7_0_gart_flush_gpu_tlb - gart tlb flush callback
 *
 * @adev: amdgpu_device pointer
 * @vmid: vm instance to flush
 *
 * Flush the TLB for the requested page table (CIK).
 */
static void gmc_v7_0_gart_flush_gpu_tlb(struct amdgpu_device *adev,
                                        uint32_t vmid)
{
        /* flush hdp cache */
        WREG32(mmHDP_MEM_COHERENCY_FLUSH_CNTL, 0);

        /* bits 0-15 are the VM contexts0-15 */
        WREG32(mmVM_INVALIDATE_REQUEST, 1 << vmid);
}

/**
 * gmc_v7_0_gart_set_pte_pde - update the page tables using MMIO
 *
 * @adev: amdgpu_device pointer
 * @cpu_pt_addr: cpu address of the page table
 * @gpu_page_idx: entry in the page table to update
 * @addr: dst addr to write into pte/pde
 * @flags: access flags
 *
 * Update the page tables using the CPU.
 */
static int gmc_v7_0_gart_set_pte_pde(struct amdgpu_device *adev,
                                     void *cpu_pt_addr,
                                     uint32_t gpu_page_idx,
                                     uint64_t addr,
                                     uint32_t flags)
{
        void __iomem *ptr = (void *)cpu_pt_addr;
        uint64_t value;

        value = addr & 0xFFFFFFFFFFFFF000ULL;
        value |= flags;
        writeq(value, ptr + (gpu_page_idx * 8));

        return 0;
}

/**
 * gmc_v8_0_set_fault_enable_default - update VM fault handling
 *
 * @adev: amdgpu_device pointer
 * @value: true redirects VM faults to the default page
 */
static void gmc_v7_0_set_fault_enable_default(struct amdgpu_device *adev,
                                              bool value)
{
        u32 tmp;

        tmp = RREG32(mmVM_CONTEXT1_CNTL);
        tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL,
                            RANGE_PROTECTION_FAULT_ENABLE_DEFAULT, value);
        tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL,
                            DUMMY_PAGE_PROTECTION_FAULT_ENABLE_DEFAULT, value);
        tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL,
                            PDE0_PROTECTION_FAULT_ENABLE_DEFAULT, value);
        tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL,
                            VALID_PROTECTION_FAULT_ENABLE_DEFAULT, value);
        tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL,
                            READ_PROTECTION_FAULT_ENABLE_DEFAULT, value);
        tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL,
                            WRITE_PROTECTION_FAULT_ENABLE_DEFAULT, value);
        WREG32(mmVM_CONTEXT1_CNTL, tmp);
}

/**
 * gmc_v7_0_gart_enable - gart enable
 *
 * @adev: amdgpu_device pointer
 *
 * This sets up the TLBs, programs the page tables for VMID0,
 * sets up the hw for VMIDs 1-15 which are allocated on
 * demand, and sets up the global locations for the LDS, GDS,
 * and GPUVM for FSA64 clients (CIK).
 * Returns 0 for success, errors for failure.
 */
static int gmc_v7_0_gart_enable(struct amdgpu_device *adev)
{
        int r, i;
        u32 tmp;

        if (adev->gart.robj == NULL) {
                dev_err(adev->dev, "No VRAM object for PCIE GART.\n");
                return -EINVAL;
        }
        r = amdgpu_gart_table_vram_pin(adev);
        if (r)
                return r;
        /* Setup TLB control */
        tmp = RREG32(mmMC_VM_MX_L1_TLB_CNTL);
        tmp = REG_SET_FIELD(tmp, MC_VM_MX_L1_TLB_CNTL, ENABLE_L1_TLB, 1);
        tmp = REG_SET_FIELD(tmp, MC_VM_MX_L1_TLB_CNTL, ENABLE_L1_FRAGMENT_PROCESSING, 1);
        tmp = REG_SET_FIELD(tmp, MC_VM_MX_L1_TLB_CNTL, SYSTEM_ACCESS_MODE, 3);
        tmp = REG_SET_FIELD(tmp, MC_VM_MX_L1_TLB_CNTL, ENABLE_ADVANCED_DRIVER_MODEL, 1);
        tmp = REG_SET_FIELD(tmp, MC_VM_MX_L1_TLB_CNTL, SYSTEM_APERTURE_UNMAPPED_ACCESS, 0);
        WREG32(mmMC_VM_MX_L1_TLB_CNTL, tmp);
        /* Setup L2 cache */
        tmp = RREG32(mmVM_L2_CNTL);
        tmp = REG_SET_FIELD(tmp, VM_L2_CNTL, ENABLE_L2_CACHE, 1);
        tmp = REG_SET_FIELD(tmp, VM_L2_CNTL, ENABLE_L2_FRAGMENT_PROCESSING, 1);
        tmp = REG_SET_FIELD(tmp, VM_L2_CNTL, ENABLE_L2_PTE_CACHE_LRU_UPDATE_BY_WRITE, 1);
        tmp = REG_SET_FIELD(tmp, VM_L2_CNTL, ENABLE_L2_PDE0_CACHE_LRU_UPDATE_BY_WRITE, 1);
        tmp = REG_SET_FIELD(tmp, VM_L2_CNTL, EFFECTIVE_L2_QUEUE_SIZE, 7);
        tmp = REG_SET_FIELD(tmp, VM_L2_CNTL, CONTEXT1_IDENTITY_ACCESS_MODE, 1);
        tmp = REG_SET_FIELD(tmp, VM_L2_CNTL, ENABLE_DEFAULT_PAGE_OUT_TO_SYSTEM_MEMORY, 1);
        WREG32(mmVM_L2_CNTL, tmp);
        tmp = REG_SET_FIELD(0, VM_L2_CNTL2, INVALIDATE_ALL_L1_TLBS, 1);
        tmp = REG_SET_FIELD(tmp, VM_L2_CNTL2, INVALIDATE_L2_CACHE, 1);
        WREG32(mmVM_L2_CNTL2, tmp);
        tmp = RREG32(mmVM_L2_CNTL3);
        tmp = REG_SET_FIELD(tmp, VM_L2_CNTL3, L2_CACHE_BIGK_ASSOCIATIVITY, 1);
        tmp = REG_SET_FIELD(tmp, VM_L2_CNTL3, BANK_SELECT, 4);
        tmp = REG_SET_FIELD(tmp, VM_L2_CNTL3, L2_CACHE_BIGK_FRAGMENT_SIZE, 4);
        WREG32(mmVM_L2_CNTL3, tmp);
        /* setup context0 */
        WREG32(mmVM_CONTEXT0_PAGE_TABLE_START_ADDR, adev->mc.gtt_start >> 12);
        WREG32(mmVM_CONTEXT0_PAGE_TABLE_END_ADDR, (adev->mc.gtt_end >> 12) - 1);
        WREG32(mmVM_CONTEXT0_PAGE_TABLE_BASE_ADDR, adev->gart.table_addr >> 12);
        WREG32(mmVM_CONTEXT0_PROTECTION_FAULT_DEFAULT_ADDR,
                        (u32)(adev->dummy_page.addr >> 12));
        WREG32(mmVM_CONTEXT0_CNTL2, 0);
        tmp = RREG32(mmVM_CONTEXT0_CNTL);
        tmp = REG_SET_FIELD(tmp, VM_CONTEXT0_CNTL, ENABLE_CONTEXT, 1);
        tmp = REG_SET_FIELD(tmp, VM_CONTEXT0_CNTL, PAGE_TABLE_DEPTH, 0);
        tmp = REG_SET_FIELD(tmp, VM_CONTEXT0_CNTL, RANGE_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
        WREG32(mmVM_CONTEXT0_CNTL, tmp);

        WREG32(0x575, 0);
        WREG32(0x576, 0);
        WREG32(0x577, 0);

        /* empty context1-15 */
        /* FIXME start with 4G, once using 2 level pt switch to full
         * vm size space
         */
        /* set vm size, must be a multiple of 4 */
        WREG32(mmVM_CONTEXT1_PAGE_TABLE_START_ADDR, 0);
        WREG32(mmVM_CONTEXT1_PAGE_TABLE_END_ADDR, adev->vm_manager.max_pfn - 1);
        for (i = 1; i < 16; i++) {
                if (i < 8)
                        WREG32(mmVM_CONTEXT0_PAGE_TABLE_BASE_ADDR + i,
                               adev->gart.table_addr >> 12);
                else
                        WREG32(mmVM_CONTEXT8_PAGE_TABLE_BASE_ADDR + i - 8,
                               adev->gart.table_addr >> 12);
        }

        /* enable context1-15 */
        WREG32(mmVM_CONTEXT1_PROTECTION_FAULT_DEFAULT_ADDR,
               (u32)(adev->dummy_page.addr >> 12));
        WREG32(mmVM_CONTEXT1_CNTL2, 4);
        tmp = RREG32(mmVM_CONTEXT1_CNTL);
        tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL, ENABLE_CONTEXT, 1);
        tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL, PAGE_TABLE_DEPTH, 1);
        tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL, PAGE_TABLE_BLOCK_SIZE,
                            amdgpu_vm_block_size - 9);
        WREG32(mmVM_CONTEXT1_CNTL, tmp);
        if (amdgpu_vm_fault_stop == AMDGPU_VM_FAULT_STOP_ALWAYS)
                gmc_v7_0_set_fault_enable_default(adev, false);
        else
                gmc_v7_0_set_fault_enable_default(adev, true);

        if (adev->asic_type == CHIP_KAVERI) {
                tmp = RREG32(mmCHUB_CONTROL);
                tmp &= ~BYPASS_VM;
                WREG32(mmCHUB_CONTROL, tmp);
        }

        gmc_v7_0_gart_flush_gpu_tlb(adev, 0);
        DRM_INFO("PCIE GART of %uM enabled (table at 0x%016llX).\n",
                 (unsigned)(adev->mc.gtt_size >> 20),
                 (unsigned long long)adev->gart.table_addr);
        adev->gart.ready = true;
        return 0;
}

static int gmc_v7_0_gart_init(struct amdgpu_device *adev)
{
        int r;

        if (adev->gart.robj) {
                WARN(1, "R600 PCIE GART already initialized\n");
                return 0;
        }
        /* Initialize common gart structure */
        r = amdgpu_gart_init(adev);
        if (r)
                return r;
        adev->gart.table_size = adev->gart.num_gpu_pages * 8;
        return amdgpu_gart_table_vram_alloc(adev);
}

/**
 * gmc_v7_0_gart_disable - gart disable
 *
 * @adev: amdgpu_device pointer
 *
 * This disables all VM page table (CIK).
 */
static void gmc_v7_0_gart_disable(struct amdgpu_device *adev)
{
        u32 tmp;

        /* Disable all tables */
        WREG32(mmVM_CONTEXT0_CNTL, 0);
        WREG32(mmVM_CONTEXT1_CNTL, 0);
        /* Setup TLB control */
        tmp = RREG32(mmMC_VM_MX_L1_TLB_CNTL);
        tmp = REG_SET_FIELD(tmp, MC_VM_MX_L1_TLB_CNTL, ENABLE_L1_TLB, 0);
        tmp = REG_SET_FIELD(tmp, MC_VM_MX_L1_TLB_CNTL, ENABLE_L1_FRAGMENT_PROCESSING, 0);
        tmp = REG_SET_FIELD(tmp, MC_VM_MX_L1_TLB_CNTL, ENABLE_ADVANCED_DRIVER_MODEL, 0);
        WREG32(mmMC_VM_MX_L1_TLB_CNTL, tmp);
        /* Setup L2 cache */
        tmp = RREG32(mmVM_L2_CNTL);
        tmp = REG_SET_FIELD(tmp, VM_L2_CNTL, ENABLE_L2_CACHE, 0);
        WREG32(mmVM_L2_CNTL, tmp);
        WREG32(mmVM_L2_CNTL2, 0);
        amdgpu_gart_table_vram_unpin(adev);
}

/**
 * gmc_v7_0_gart_fini - vm fini callback
 *
 * @adev: amdgpu_device pointer
 *
 * Tears down the driver GART/VM setup (CIK).
 */
static void gmc_v7_0_gart_fini(struct amdgpu_device *adev)
{
        amdgpu_gart_table_vram_free(adev);
        amdgpu_gart_fini(adev);
}

/*
 * vm
 * VMID 0 is the physical GPU addresses as used by the kernel.
 * VMIDs 1-15 are used for userspace clients and are handled
 * by the amdgpu vm/hsa code.
 */
/**
 * gmc_v7_0_vm_init - cik vm init callback
 *
 * @adev: amdgpu_device pointer
 *
 * Inits cik specific vm parameters (number of VMs, base of vram for
 * VMIDs 1-15) (CIK).
 * Returns 0 for success.
 */
static int gmc_v7_0_vm_init(struct amdgpu_device *adev)
{
        /*
         * number of VMs
         * VMID 0 is reserved for System
         * amdgpu graphics/compute will use VMIDs 1-7
         * amdkfd will use VMIDs 8-15
         */
        adev->vm_manager.nvm = AMDGPU_NUM_OF_VMIDS;

        /* base offset of vram pages */
        if (adev->flags & AMD_IS_APU) {
                u64 tmp = RREG32(mmMC_VM_FB_OFFSET);
                tmp <<= 22;
                adev->vm_manager.vram_base_offset = tmp;
        } else
                adev->vm_manager.vram_base_offset = 0;

        return 0;
}

/**
 * gmc_v7_0_vm_fini - cik vm fini callback
 *
 * @adev: amdgpu_device pointer
 *
 * Tear down any asic specific VM setup (CIK).
 */
static void gmc_v7_0_vm_fini(struct amdgpu_device *adev)
{
}

/**
 * gmc_v7_0_vm_decode_fault - print human readable fault info
 *
 * @adev: amdgpu_device pointer
 * @status: VM_CONTEXT1_PROTECTION_FAULT_STATUS register value
 * @addr: VM_CONTEXT1_PROTECTION_FAULT_ADDR register value
 *
 * Print human readable fault information (CIK).
 */
static void gmc_v7_0_vm_decode_fault(struct amdgpu_device *adev,
                                     u32 status, u32 addr, u32 mc_client)
{
        u32 mc_id;
        u32 vmid = REG_GET_FIELD(status, VM_CONTEXT1_PROTECTION_FAULT_STATUS, VMID);
        u32 protections = REG_GET_FIELD(status, VM_CONTEXT1_PROTECTION_FAULT_STATUS,
                                        PROTECTIONS);
        char block[5] = { mc_client >> 24, (mc_client >> 16) & 0xff,
                (mc_client >> 8) & 0xff, mc_client & 0xff, 0 };

        mc_id = REG_GET_FIELD(status, VM_CONTEXT1_PROTECTION_FAULT_STATUS,
                              MEMORY_CLIENT_ID);

        printk("VM fault (0x%02x, vmid %d) at page %u, %s from '%s' (0x%08x) (%d)\n",
               protections, vmid, addr,
               REG_GET_FIELD(status, VM_CONTEXT1_PROTECTION_FAULT_STATUS,
                             MEMORY_CLIENT_RW) ?
               "write" : "read", block, mc_client, mc_id);
}


static const u32 mc_cg_registers[] = {
        mmMC_HUB_MISC_HUB_CG,
        mmMC_HUB_MISC_SIP_CG,
        mmMC_HUB_MISC_VM_CG,
        mmMC_XPB_CLK_GAT,
        mmATC_MISC_CG,
        mmMC_CITF_MISC_WR_CG,
        mmMC_CITF_MISC_RD_CG,
        mmMC_CITF_MISC_VM_CG,
        mmVM_L2_CG,
};

static const u32 mc_cg_ls_en[] = {
        MC_HUB_MISC_HUB_CG__MEM_LS_ENABLE_MASK,
        MC_HUB_MISC_SIP_CG__MEM_LS_ENABLE_MASK,
        MC_HUB_MISC_VM_CG__MEM_LS_ENABLE_MASK,
        MC_XPB_CLK_GAT__MEM_LS_ENABLE_MASK,
        ATC_MISC_CG__MEM_LS_ENABLE_MASK,
        MC_CITF_MISC_WR_CG__MEM_LS_ENABLE_MASK,
        MC_CITF_MISC_RD_CG__MEM_LS_ENABLE_MASK,
        MC_CITF_MISC_VM_CG__MEM_LS_ENABLE_MASK,
        VM_L2_CG__MEM_LS_ENABLE_MASK,
};

static const u32 mc_cg_en[] = {
        MC_HUB_MISC_HUB_CG__ENABLE_MASK,
        MC_HUB_MISC_SIP_CG__ENABLE_MASK,
        MC_HUB_MISC_VM_CG__ENABLE_MASK,
        MC_XPB_CLK_GAT__ENABLE_MASK,
        ATC_MISC_CG__ENABLE_MASK,
        MC_CITF_MISC_WR_CG__ENABLE_MASK,
        MC_CITF_MISC_RD_CG__ENABLE_MASK,
        MC_CITF_MISC_VM_CG__ENABLE_MASK,
        VM_L2_CG__ENABLE_MASK,
};

static void gmc_v7_0_enable_mc_ls(struct amdgpu_device *adev,
                                  bool enable)
{
        int i;
        u32 orig, data;

        for (i = 0; i < ARRAY_SIZE(mc_cg_registers); i++) {
                orig = data = RREG32(mc_cg_registers[i]);
                if (enable && (adev->cg_flags & AMDGPU_CG_SUPPORT_MC_LS))
                        data |= mc_cg_ls_en[i];
                else
                        data &= ~mc_cg_ls_en[i];
                if (data != orig)
                        WREG32(mc_cg_registers[i], data);
        }
}

static void gmc_v7_0_enable_mc_mgcg(struct amdgpu_device *adev,
                                    bool enable)
{
        int i;
        u32 orig, data;

        for (i = 0; i < ARRAY_SIZE(mc_cg_registers); i++) {
                orig = data = RREG32(mc_cg_registers[i]);
                if (enable && (adev->cg_flags & AMDGPU_CG_SUPPORT_MC_MGCG))
                        data |= mc_cg_en[i];
                else
                        data &= ~mc_cg_en[i];
                if (data != orig)
                        WREG32(mc_cg_registers[i], data);
        }
}

static void gmc_v7_0_enable_bif_mgls(struct amdgpu_device *adev,
                                     bool enable)
{
        u32 orig, data;

        orig = data = RREG32_PCIE(ixPCIE_CNTL2);

        if (enable && (adev->cg_flags & AMDGPU_CG_SUPPORT_BIF_LS)) {
                data = REG_SET_FIELD(data, PCIE_CNTL2, SLV_MEM_LS_EN, 1);
                data = REG_SET_FIELD(data, PCIE_CNTL2, MST_MEM_LS_EN, 1);
                data = REG_SET_FIELD(data, PCIE_CNTL2, REPLAY_MEM_LS_EN, 1);
                data = REG_SET_FIELD(data, PCIE_CNTL2, SLV_MEM_AGGRESSIVE_LS_EN, 1);
        } else {
                data = REG_SET_FIELD(data, PCIE_CNTL2, SLV_MEM_LS_EN, 0);
                data = REG_SET_FIELD(data, PCIE_CNTL2, MST_MEM_LS_EN, 0);
                data = REG_SET_FIELD(data, PCIE_CNTL2, REPLAY_MEM_LS_EN, 0);
                data = REG_SET_FIELD(data, PCIE_CNTL2, SLV_MEM_AGGRESSIVE_LS_EN, 0);
        }

        if (orig != data)
                WREG32_PCIE(ixPCIE_CNTL2, data);
}

static void gmc_v7_0_enable_hdp_mgcg(struct amdgpu_device *adev,
                                     bool enable)
{
        u32 orig, data;

        orig = data = RREG32(mmHDP_HOST_PATH_CNTL);

        if (enable && (adev->cg_flags & AMDGPU_CG_SUPPORT_HDP_MGCG))
                data = REG_SET_FIELD(data, HDP_HOST_PATH_CNTL, CLOCK_GATING_DIS, 0);
        else
                data = REG_SET_FIELD(data, HDP_HOST_PATH_CNTL, CLOCK_GATING_DIS, 1);

        if (orig != data)
                WREG32(mmHDP_HOST_PATH_CNTL, data);
}

static void gmc_v7_0_enable_hdp_ls(struct amdgpu_device *adev,
                                   bool enable)
{
        u32 orig, data;

        orig = data = RREG32(mmHDP_MEM_POWER_LS);

        if (enable && (adev->cg_flags & AMDGPU_CG_SUPPORT_HDP_LS))
                data = REG_SET_FIELD(data, HDP_MEM_POWER_LS, LS_ENABLE, 1);
        else
                data = REG_SET_FIELD(data, HDP_MEM_POWER_LS, LS_ENABLE, 0);

        if (orig != data)
                WREG32(mmHDP_MEM_POWER_LS, data);
}

static int gmc_v7_0_convert_vram_type(int mc_seq_vram_type)
{
        switch (mc_seq_vram_type) {
        case MC_SEQ_MISC0__MT__GDDR1:
                return AMDGPU_VRAM_TYPE_GDDR1;
        case MC_SEQ_MISC0__MT__DDR2:
                return AMDGPU_VRAM_TYPE_DDR2;
        case MC_SEQ_MISC0__MT__GDDR3:
                return AMDGPU_VRAM_TYPE_GDDR3;
        case MC_SEQ_MISC0__MT__GDDR4:
                return AMDGPU_VRAM_TYPE_GDDR4;
        case MC_SEQ_MISC0__MT__GDDR5:
                return AMDGPU_VRAM_TYPE_GDDR5;
        case MC_SEQ_MISC0__MT__HBM:
                return AMDGPU_VRAM_TYPE_HBM;
        case MC_SEQ_MISC0__MT__DDR3:
                return AMDGPU_VRAM_TYPE_DDR3;
        default:
                return AMDGPU_VRAM_TYPE_UNKNOWN;
        }
}

static int gmc_v7_0_early_init(void *handle)
{
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

        gmc_v7_0_set_gart_funcs(adev);
        gmc_v7_0_set_irq_funcs(adev);

        if (adev->flags & AMD_IS_APU) {
                adev->mc.vram_type = AMDGPU_VRAM_TYPE_UNKNOWN;
        } else {
                u32 tmp = RREG32(mmMC_SEQ_MISC0);
                tmp &= MC_SEQ_MISC0__MT__MASK;
                adev->mc.vram_type = gmc_v7_0_convert_vram_type(tmp);
        }

        return 0;
}

static int gmc_v7_0_late_init(void *handle)
{
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

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

static int gmc_v7_0_sw_init(void *handle)
{
        int r;
        int dma_bits;
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

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

        r = amdgpu_irq_add_id(adev, 146, &adev->mc.vm_fault);
        if (r)
                return r;

        r = amdgpu_irq_add_id(adev, 147, &adev->mc.vm_fault);
        if (r)
                return r;

        /* Adjust VM size here.
         * Currently set to 4GB ((1 << 20) 4k pages).
         * Max GPUVM size for cayman and SI is 40 bits.
         */
        adev->vm_manager.max_pfn = amdgpu_vm_size << 18;

        /* Set the internal MC address mask
         * This is the max address of the GPU's
         * internal address space.
         */
        adev->mc.mc_mask = 0xffffffffffULL; /* 40 bit MC */

        /* set DMA mask + need_dma32 flags.
         * PCIE - can handle 40-bits.
         * IGP - can handle 40-bits
         * PCI - dma32 for legacy pci gart, 40 bits on newer asics
         */
        adev->need_dma32 = false;
        dma_bits = adev->need_dma32 ? 32 : 40;
        r = pci_set_dma_mask(adev->pdev, DMA_BIT_MASK(dma_bits));
        if (r) {
                adev->need_dma32 = true;
                dma_bits = 32;
                printk(KERN_WARNING "amdgpu: No suitable DMA available.\n");
        }
        r = pci_set_consistent_dma_mask(adev->pdev, DMA_BIT_MASK(dma_bits));
        if (r) {
                pci_set_consistent_dma_mask(adev->pdev, DMA_BIT_MASK(32));
                printk(KERN_WARNING "amdgpu: No coherent DMA available.\n");
        }

        r = gmc_v7_0_init_microcode(adev);
        if (r) {
                DRM_ERROR("Failed to load mc firmware!\n");
                return r;
        }

        r = gmc_v7_0_mc_init(adev);
        if (r)
                return r;

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

        r = gmc_v7_0_gart_init(adev);
        if (r)
                return r;

        if (!adev->vm_manager.enabled) {
                r = gmc_v7_0_vm_init(adev);
                if (r) {
                        dev_err(adev->dev, "vm manager initialization failed (%d).\n", r);
                        return r;
                }
                adev->vm_manager.enabled = true;
        }

        return r;
}

static int gmc_v7_0_sw_fini(void *handle)
{
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

        if (adev->vm_manager.enabled) {
                amdgpu_vm_manager_fini(adev);
                gmc_v7_0_vm_fini(adev);
                adev->vm_manager.enabled = false;
        }
        gmc_v7_0_gart_fini(adev);
        amdgpu_gem_fini(adev);
        amdgpu_bo_fini(adev);

        return 0;
}

static int gmc_v7_0_hw_init(void *handle)
{
        int r;
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

        gmc_v7_0_mc_program(adev);

        if (!(adev->flags & AMD_IS_APU)) {
                r = gmc_v7_0_mc_load_microcode(adev);
                if (r) {
                        DRM_ERROR("Failed to load MC firmware!\n");
                        return r;
                }
        }

        r = gmc_v7_0_gart_enable(adev);
        if (r)
                return r;

        return r;
}

static int gmc_v7_0_hw_fini(void *handle)
{
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

        amdgpu_irq_put(adev, &adev->mc.vm_fault, 0);
        gmc_v7_0_gart_disable(adev);

        return 0;
}

static int gmc_v7_0_suspend(void *handle)
{
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

        if (adev->vm_manager.enabled) {
                amdgpu_vm_manager_fini(adev);
                gmc_v7_0_vm_fini(adev);
                adev->vm_manager.enabled = false;
        }
        gmc_v7_0_hw_fini(adev);

        return 0;
}

static int gmc_v7_0_resume(void *handle)
{
        int r;
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

        r = gmc_v7_0_hw_init(adev);
        if (r)
                return r;

        if (!adev->vm_manager.enabled) {
                r = gmc_v7_0_vm_init(adev);
                if (r) {
                        dev_err(adev->dev, "vm manager initialization failed (%d).\n", r);
                        return r;
                }
                adev->vm_manager.enabled = true;
        }

        return r;
}

static bool gmc_v7_0_is_idle(void *handle)
{
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
        u32 tmp = RREG32(mmSRBM_STATUS);

        if (tmp & (SRBM_STATUS__MCB_BUSY_MASK | SRBM_STATUS__MCB_NON_DISPLAY_BUSY_MASK |
                   SRBM_STATUS__MCC_BUSY_MASK | SRBM_STATUS__MCD_BUSY_MASK | SRBM_STATUS__VMC_BUSY_MASK))
                return false;

        return true;
}

static int gmc_v7_0_wait_for_idle(void *handle)
{
        unsigned i;
        u32 tmp;
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

        for (i = 0; i < adev->usec_timeout; i++) {
                /* read MC_STATUS */
                tmp = RREG32(mmSRBM_STATUS) & (SRBM_STATUS__MCB_BUSY_MASK |
                                               SRBM_STATUS__MCB_NON_DISPLAY_BUSY_MASK |
                                               SRBM_STATUS__MCC_BUSY_MASK |
                                               SRBM_STATUS__MCD_BUSY_MASK |
                                               SRBM_STATUS__VMC_BUSY_MASK);
                if (!tmp)
                        return 0;
                udelay(1);
        }
        return -ETIMEDOUT;

}

static void gmc_v7_0_print_status(void *handle)
{
        int i, j;
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

        dev_info(adev->dev, "GMC 8.x registers\n");
        dev_info(adev->dev, "  SRBM_STATUS=0x%08X\n",
                RREG32(mmSRBM_STATUS));
        dev_info(adev->dev, "  SRBM_STATUS2=0x%08X\n",
                RREG32(mmSRBM_STATUS2));

        dev_info(adev->dev, "  VM_CONTEXT1_PROTECTION_FAULT_ADDR   0x%08X\n",
                 RREG32(mmVM_CONTEXT1_PROTECTION_FAULT_ADDR));
        dev_info(adev->dev, "  VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x%08X\n",
                 RREG32(mmVM_CONTEXT1_PROTECTION_FAULT_STATUS));
        dev_info(adev->dev, "  MC_VM_MX_L1_TLB_CNTL=0x%08X\n",
                 RREG32(mmMC_VM_MX_L1_TLB_CNTL));
        dev_info(adev->dev, "  VM_L2_CNTL=0x%08X\n",
                 RREG32(mmVM_L2_CNTL));
        dev_info(adev->dev, "  VM_L2_CNTL2=0x%08X\n",
                 RREG32(mmVM_L2_CNTL2));
        dev_info(adev->dev, "  VM_L2_CNTL3=0x%08X\n",
                 RREG32(mmVM_L2_CNTL3));
        dev_info(adev->dev, "  VM_CONTEXT0_PAGE_TABLE_START_ADDR=0x%08X\n",
                 RREG32(mmVM_CONTEXT0_PAGE_TABLE_START_ADDR));
        dev_info(adev->dev, "  VM_CONTEXT0_PAGE_TABLE_END_ADDR=0x%08X\n",
                 RREG32(mmVM_CONTEXT0_PAGE_TABLE_END_ADDR));
        dev_info(adev->dev, "  VM_CONTEXT0_PROTECTION_FAULT_DEFAULT_ADDR=0x%08X\n",
                 RREG32(mmVM_CONTEXT0_PROTECTION_FAULT_DEFAULT_ADDR));
        dev_info(adev->dev, "  VM_CONTEXT0_CNTL2=0x%08X\n",
                 RREG32(mmVM_CONTEXT0_CNTL2));
        dev_info(adev->dev, "  VM_CONTEXT0_CNTL=0x%08X\n",
                 RREG32(mmVM_CONTEXT0_CNTL));
        dev_info(adev->dev, "  0x15D4=0x%08X\n",
                 RREG32(0x575));
        dev_info(adev->dev, "  0x15D8=0x%08X\n",
                 RREG32(0x576));
        dev_info(adev->dev, "  0x15DC=0x%08X\n",
                 RREG32(0x577));
        dev_info(adev->dev, "  VM_CONTEXT1_PAGE_TABLE_START_ADDR=0x%08X\n",
                 RREG32(mmVM_CONTEXT1_PAGE_TABLE_START_ADDR));
        dev_info(adev->dev, "  VM_CONTEXT1_PAGE_TABLE_END_ADDR=0x%08X\n",
                 RREG32(mmVM_CONTEXT1_PAGE_TABLE_END_ADDR));
        dev_info(adev->dev, "  VM_CONTEXT1_PROTECTION_FAULT_DEFAULT_ADDR=0x%08X\n",
                 RREG32(mmVM_CONTEXT1_PROTECTION_FAULT_DEFAULT_ADDR));
        dev_info(adev->dev, "  VM_CONTEXT1_CNTL2=0x%08X\n",
                 RREG32(mmVM_CONTEXT1_CNTL2));
        dev_info(adev->dev, "  VM_CONTEXT1_CNTL=0x%08X\n",
                 RREG32(mmVM_CONTEXT1_CNTL));
        for (i = 0; i < 16; i++) {
                if (i < 8)
                        dev_info(adev->dev, "  VM_CONTEXT%d_PAGE_TABLE_BASE_ADDR=0x%08X\n",
                                 i, RREG32(mmVM_CONTEXT0_PAGE_TABLE_BASE_ADDR + i));
                else
                        dev_info(adev->dev, "  VM_CONTEXT%d_PAGE_TABLE_BASE_ADDR=0x%08X\n",
                                 i, RREG32(mmVM_CONTEXT8_PAGE_TABLE_BASE_ADDR + i - 8));
        }
        dev_info(adev->dev, "  MC_VM_SYSTEM_APERTURE_LOW_ADDR=0x%08X\n",
                 RREG32(mmMC_VM_SYSTEM_APERTURE_LOW_ADDR));
        dev_info(adev->dev, "  MC_VM_SYSTEM_APERTURE_HIGH_ADDR=0x%08X\n",
                 RREG32(mmMC_VM_SYSTEM_APERTURE_HIGH_ADDR));
        dev_info(adev->dev, "  MC_VM_SYSTEM_APERTURE_DEFAULT_ADDR=0x%08X\n",
                 RREG32(mmMC_VM_SYSTEM_APERTURE_DEFAULT_ADDR));
        dev_info(adev->dev, "  MC_VM_FB_LOCATION=0x%08X\n",
                 RREG32(mmMC_VM_FB_LOCATION));
        dev_info(adev->dev, "  MC_VM_AGP_BASE=0x%08X\n",
                 RREG32(mmMC_VM_AGP_BASE));
        dev_info(adev->dev, "  MC_VM_AGP_TOP=0x%08X\n",
                 RREG32(mmMC_VM_AGP_TOP));
        dev_info(adev->dev, "  MC_VM_AGP_BOT=0x%08X\n",
                 RREG32(mmMC_VM_AGP_BOT));

        if (adev->asic_type == CHIP_KAVERI) {
                dev_info(adev->dev, "  CHUB_CONTROL=0x%08X\n",
                         RREG32(mmCHUB_CONTROL));
        }

        dev_info(adev->dev, "  HDP_REG_COHERENCY_FLUSH_CNTL=0x%08X\n",
                 RREG32(mmHDP_REG_COHERENCY_FLUSH_CNTL));
        dev_info(adev->dev, "  HDP_NONSURFACE_BASE=0x%08X\n",
                 RREG32(mmHDP_NONSURFACE_BASE));
        dev_info(adev->dev, "  HDP_NONSURFACE_INFO=0x%08X\n",
                 RREG32(mmHDP_NONSURFACE_INFO));
        dev_info(adev->dev, "  HDP_NONSURFACE_SIZE=0x%08X\n",
                 RREG32(mmHDP_NONSURFACE_SIZE));
        dev_info(adev->dev, "  HDP_MISC_CNTL=0x%08X\n",
                 RREG32(mmHDP_MISC_CNTL));
        dev_info(adev->dev, "  HDP_HOST_PATH_CNTL=0x%08X\n",
                 RREG32(mmHDP_HOST_PATH_CNTL));

        for (i = 0, j = 0; i < 32; i++, j += 0x6) {
                dev_info(adev->dev, "  %d:\n", i);
                dev_info(adev->dev, "  0x%04X=0x%08X\n",
                         0xb05 + j, RREG32(0xb05 + j));
                dev_info(adev->dev, "  0x%04X=0x%08X\n",
                         0xb06 + j, RREG32(0xb06 + j));
                dev_info(adev->dev, "  0x%04X=0x%08X\n",
                         0xb07 + j, RREG32(0xb07 + j));
                dev_info(adev->dev, "  0x%04X=0x%08X\n",
                         0xb08 + j, RREG32(0xb08 + j));
                dev_info(adev->dev, "  0x%04X=0x%08X\n",
                         0xb09 + j, RREG32(0xb09 + j));
        }

        dev_info(adev->dev, "  BIF_FB_EN=0x%08X\n",
                 RREG32(mmBIF_FB_EN));
}

static int gmc_v7_0_soft_reset(void *handle)
{
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
        struct amdgpu_mode_mc_save save;
        u32 srbm_soft_reset = 0;
        u32 tmp = RREG32(mmSRBM_STATUS);

        if (tmp & SRBM_STATUS__VMC_BUSY_MASK)
                srbm_soft_reset = REG_SET_FIELD(srbm_soft_reset,
                                                SRBM_SOFT_RESET, SOFT_RESET_VMC, 1);

        if (tmp & (SRBM_STATUS__MCB_BUSY_MASK | SRBM_STATUS__MCB_NON_DISPLAY_BUSY_MASK |
                   SRBM_STATUS__MCC_BUSY_MASK | SRBM_STATUS__MCD_BUSY_MASK)) {
                if (!(adev->flags & AMD_IS_APU))
                        srbm_soft_reset = REG_SET_FIELD(srbm_soft_reset,
                                                        SRBM_SOFT_RESET, SOFT_RESET_MC, 1);
        }

        if (srbm_soft_reset) {
                gmc_v7_0_print_status((void *)adev);

                gmc_v7_0_mc_stop(adev, &save);
                if (gmc_v7_0_wait_for_idle(adev)) {
                        dev_warn(adev->dev, "Wait for GMC idle timed out !\n");
                }


                tmp = RREG32(mmSRBM_SOFT_RESET);
                tmp |= srbm_soft_reset;
                dev_info(adev->dev, "SRBM_SOFT_RESET=0x%08X\n", tmp);
                WREG32(mmSRBM_SOFT_RESET, tmp);
                tmp = RREG32(mmSRBM_SOFT_RESET);

                udelay(50);

                tmp &= ~srbm_soft_reset;
                WREG32(mmSRBM_SOFT_RESET, tmp);
                tmp = RREG32(mmSRBM_SOFT_RESET);

                /* Wait a little for things to settle down */
                udelay(50);

                gmc_v7_0_mc_resume(adev, &save);
                udelay(50);

                gmc_v7_0_print_status((void *)adev);
        }

        return 0;
}

static int gmc_v7_0_vm_fault_interrupt_state(struct amdgpu_device *adev,
                                             struct amdgpu_irq_src *src,
                                             unsigned type,
                                             enum amdgpu_interrupt_state state)
{
        u32 tmp;
        u32 bits = (VM_CONTEXT1_CNTL__RANGE_PROTECTION_FAULT_ENABLE_INTERRUPT_MASK |
                    VM_CONTEXT1_CNTL__DUMMY_PAGE_PROTECTION_FAULT_ENABLE_INTERRUPT_MASK |
                    VM_CONTEXT1_CNTL__PDE0_PROTECTION_FAULT_ENABLE_INTERRUPT_MASK |
                    VM_CONTEXT1_CNTL__VALID_PROTECTION_FAULT_ENABLE_INTERRUPT_MASK |
                    VM_CONTEXT1_CNTL__READ_PROTECTION_FAULT_ENABLE_INTERRUPT_MASK |
                    VM_CONTEXT1_CNTL__WRITE_PROTECTION_FAULT_ENABLE_INTERRUPT_MASK);

        switch (state) {
        case AMDGPU_IRQ_STATE_DISABLE:
                /* system context */
                tmp = RREG32(mmVM_CONTEXT0_CNTL);
                tmp &= ~bits;
                WREG32(mmVM_CONTEXT0_CNTL, tmp);
                /* VMs */
                tmp = RREG32(mmVM_CONTEXT1_CNTL);
                tmp &= ~bits;
                WREG32(mmVM_CONTEXT1_CNTL, tmp);
                break;
        case AMDGPU_IRQ_STATE_ENABLE:
                /* system context */
                tmp = RREG32(mmVM_CONTEXT0_CNTL);
                tmp |= bits;
                WREG32(mmVM_CONTEXT0_CNTL, tmp);
                /* VMs */
                tmp = RREG32(mmVM_CONTEXT1_CNTL);
                tmp |= bits;
                WREG32(mmVM_CONTEXT1_CNTL, tmp);
                break;
        default:
                break;
        }

        return 0;
}

static int gmc_v7_0_process_interrupt(struct amdgpu_device *adev,
                                      struct amdgpu_irq_src *source,
                                      struct amdgpu_iv_entry *entry)
{
        u32 addr, status, mc_client;

        addr = RREG32(mmVM_CONTEXT1_PROTECTION_FAULT_ADDR);
        status = RREG32(mmVM_CONTEXT1_PROTECTION_FAULT_STATUS);
        mc_client = RREG32(mmVM_CONTEXT1_PROTECTION_FAULT_MCCLIENT);
        /* reset addr and status */
        WREG32_P(mmVM_CONTEXT1_CNTL2, 1, ~1);

        if (!addr && !status)
                return 0;

        if (amdgpu_vm_fault_stop == AMDGPU_VM_FAULT_STOP_FIRST)
                gmc_v7_0_set_fault_enable_default(adev, false);

        dev_err(adev->dev, "GPU fault detected: %d 0x%08x\n",
                entry->src_id, entry->src_data);
        dev_err(adev->dev, "  VM_CONTEXT1_PROTECTION_FAULT_ADDR   0x%08X\n",
                addr);
        dev_err(adev->dev, "  VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x%08X\n",
                status);
        gmc_v7_0_vm_decode_fault(adev, status, addr, mc_client);

        return 0;
}

static int gmc_v7_0_set_clockgating_state(void *handle,
                                          enum amd_clockgating_state state)
{
        bool gate = false;
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

        if (state == AMD_CG_STATE_GATE)
                gate = true;

        if (!(adev->flags & AMD_IS_APU)) {
                gmc_v7_0_enable_mc_mgcg(adev, gate);
                gmc_v7_0_enable_mc_ls(adev, gate);
        }
        gmc_v7_0_enable_bif_mgls(adev, gate);
        gmc_v7_0_enable_hdp_mgcg(adev, gate);
        gmc_v7_0_enable_hdp_ls(adev, gate);

        return 0;
}

static int gmc_v7_0_set_powergating_state(void *handle,
                                          enum amd_powergating_state state)
{
        return 0;
}

const struct amd_ip_funcs gmc_v7_0_ip_funcs = {
        .early_init = gmc_v7_0_early_init,
        .late_init = gmc_v7_0_late_init,
        .sw_init = gmc_v7_0_sw_init,
        .sw_fini = gmc_v7_0_sw_fini,
        .hw_init = gmc_v7_0_hw_init,
        .hw_fini = gmc_v7_0_hw_fini,
        .suspend = gmc_v7_0_suspend,
        .resume = gmc_v7_0_resume,
        .is_idle = gmc_v7_0_is_idle,
        .wait_for_idle = gmc_v7_0_wait_for_idle,
        .soft_reset = gmc_v7_0_soft_reset,
        .print_status = gmc_v7_0_print_status,
        .set_clockgating_state = gmc_v7_0_set_clockgating_state,
        .set_powergating_state = gmc_v7_0_set_powergating_state,
};

static const struct amdgpu_gart_funcs gmc_v7_0_gart_funcs = {
        .flush_gpu_tlb = gmc_v7_0_gart_flush_gpu_tlb,
        .set_pte_pde = gmc_v7_0_gart_set_pte_pde,
};

static const struct amdgpu_irq_src_funcs gmc_v7_0_irq_funcs = {
        .set = gmc_v7_0_vm_fault_interrupt_state,
        .process = gmc_v7_0_process_interrupt,
};

static void gmc_v7_0_set_gart_funcs(struct amdgpu_device *adev)
{
        if (adev->gart.gart_funcs == NULL)
                adev->gart.gart_funcs = &gmc_v7_0_gart_funcs;
}

static void gmc_v7_0_set_irq_funcs(struct amdgpu_device *adev)
{
        adev->mc.vm_fault.num_types = 1;
        adev->mc.vm_fault.funcs = &gmc_v7_0_irq_funcs;
}