/*
 * Copyright 2023 Advanced Micro Devices, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 */
#include <linux/firmware.h>
#include <linux/pci.h>

#include <drm/drm_cache.h>

#include "amdgpu.h"
#include "amdgpu_atomfirmware.h"
#include "gmc_v12_0.h"
#include "gmc_v12_1.h"
#include "athub/athub_4_1_0_sh_mask.h"
#include "athub/athub_4_1_0_offset.h"
#include "oss/osssys_7_0_0_offset.h"
#include "ivsrcid/vmc/irqsrcs_vmc_1_0.h"
#include "soc24_enum.h"
#include "soc24.h"
#include "soc15d.h"
#include "soc15_common.h"
#include "nbif_v6_3_1.h"
#include "gfxhub_v12_0.h"
#include "gfxhub_v12_1.h"
#include "mmhub_v4_1_0.h"
#include "mmhub_v4_2_0.h"
#include "athub_v4_1_0.h"
#include "umc_v8_14.h"

static int gmc_v12_0_ecc_interrupt_state(struct amdgpu_device *adev,
                                         struct amdgpu_irq_src *src,
                                         unsigned type,
                                         enum amdgpu_interrupt_state state)
{
        return 0;
}

static int gmc_v12_0_vm_fault_interrupt_state(struct amdgpu_device *adev,
                                              struct amdgpu_irq_src *src, unsigned type,
                                              enum amdgpu_interrupt_state state)
{
        switch (state) {
        case AMDGPU_IRQ_STATE_DISABLE:
                /* MM HUB */
                amdgpu_gmc_set_vm_fault_masks(adev, AMDGPU_MMHUB0(0), false);
                /* GFX HUB */
                /* This works because this interrupt is only
                 * enabled at init/resume and disabled in
                 * fini/suspend, so the overall state doesn't
                 * change over the course of suspend/resume.
                 */
                if (!adev->in_s0ix)
                        amdgpu_gmc_set_vm_fault_masks(adev, AMDGPU_GFXHUB(0), false);
                break;
        case AMDGPU_IRQ_STATE_ENABLE:
                /* MM HUB */
                amdgpu_gmc_set_vm_fault_masks(adev, AMDGPU_MMHUB0(0), true);
                /* GFX HUB */
                /* This works because this interrupt is only
                 * enabled at init/resume and disabled in
                 * fini/suspend, so the overall state doesn't
                 * change over the course of suspend/resume.
                 */
                if (!adev->in_s0ix)
                        amdgpu_gmc_set_vm_fault_masks(adev, AMDGPU_GFXHUB(0), true);
                break;
        default:
                break;
        }

        return 0;
}

static int gmc_v12_0_process_interrupt(struct amdgpu_device *adev,
                                       struct amdgpu_irq_src *source,
                                       struct amdgpu_iv_entry *entry)
{
        struct amdgpu_vmhub *hub;
        bool retry_fault = !!(entry->src_data[1] &
                              AMDGPU_GMC9_FAULT_SOURCE_DATA_RETRY);
        bool write_fault = !!(entry->src_data[1] &
                              AMDGPU_GMC9_FAULT_SOURCE_DATA_WRITE);
        uint32_t status = 0;
        u64 addr;

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

        if (entry->client_id == SOC21_IH_CLIENTID_VMC)
                hub = &adev->vmhub[AMDGPU_MMHUB0(0)];
        else
                hub = &adev->vmhub[AMDGPU_GFXHUB(0)];

        if (retry_fault) {
                int ret = amdgpu_gmc_handle_retry_fault(adev, entry, addr, 0, 0,
                                                        write_fault);
                /* Returning 1 here also prevents sending the IV to the KFD */
                if (ret == 1)
                        return 1;
        }

        if (!amdgpu_sriov_vf(adev)) {
                /*
                 * Issue a dummy read to wait for the status register to
                 * be updated to avoid reading an incorrect value due to
                 * the new fast GRBM interface.
                 */
                if (entry->vmid_src == AMDGPU_GFXHUB(0))
                        RREG32(hub->vm_l2_pro_fault_status);

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

                amdgpu_vm_update_fault_cache(adev, entry->pasid, addr, status,
                                             entry->vmid_src ? AMDGPU_MMHUB0(0) : AMDGPU_GFXHUB(0));
        }

        if (printk_ratelimit()) {
                struct amdgpu_task_info *task_info;

                dev_err(adev->dev,
                        "[%s] page fault (src_id:%u ring:%u vmid:%u pasid:%u)\n",
                        entry->vmid_src ? "mmhub" : "gfxhub",
                        entry->src_id, entry->ring_id, entry->vmid, entry->pasid);
                task_info = amdgpu_vm_get_task_info_pasid(adev, entry->pasid);
                if (task_info) {
                        amdgpu_vm_print_task_info(adev, task_info);
                        amdgpu_vm_put_task_info(task_info);
                }

                dev_err(adev->dev, "  in page starting at address 0x%016llx from client %d\n",
                                addr, entry->client_id);

                /* Only print L2 fault status if the status register could be read and
                 * contains useful information
                 */
                if (status != 0)
                        hub->vmhub_funcs->print_l2_protection_fault_status(adev, status);
        }

        return 0;
}

static const struct amdgpu_irq_src_funcs gmc_v12_0_irq_funcs = {
        .set = gmc_v12_0_vm_fault_interrupt_state,
        .process = gmc_v12_0_process_interrupt,
};

static const struct amdgpu_irq_src_funcs gmc_v12_0_ecc_funcs = {
        .set = gmc_v12_0_ecc_interrupt_state,
        .process = amdgpu_umc_process_ecc_irq,
};

static void gmc_v12_0_set_irq_funcs(struct amdgpu_device *adev)
{
        adev->gmc.vm_fault.num_types = 1;
        adev->gmc.vm_fault.funcs = &gmc_v12_0_irq_funcs;

        if (!amdgpu_sriov_vf(adev)) {
                adev->gmc.ecc_irq.num_types = 1;
                adev->gmc.ecc_irq.funcs = &gmc_v12_0_ecc_funcs;
        }
}

/**
 * gmc_v12_0_use_invalidate_semaphore - judge whether to use semaphore
 *
 * @adev: amdgpu_device pointer
 * @vmhub: vmhub type
 *
 */
static bool gmc_v12_0_use_invalidate_semaphore(struct amdgpu_device *adev,
                                       uint32_t vmhub)
{
        return ((vmhub == AMDGPU_MMHUB0(0)) &&
                (!amdgpu_sriov_vf(adev)));
}

static bool gmc_v12_0_get_vmid_pasid_mapping_info(
                                        struct amdgpu_device *adev,
                                        uint8_t vmid, uint16_t *p_pasid)
{
        *p_pasid = RREG32(SOC15_REG_OFFSET(OSSSYS, 0, regIH_VMID_0_LUT) + vmid) & 0xffff;

        return !!(*p_pasid);
}

/*
 * 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.
 */

static void gmc_v12_0_flush_vm_hub(struct amdgpu_device *adev, uint32_t vmid,
                                   unsigned int vmhub, uint32_t flush_type)
{
        bool use_semaphore = gmc_v12_0_use_invalidate_semaphore(adev, vmhub);
        struct amdgpu_vmhub *hub = &adev->vmhub[vmhub];
        u32 inv_req = hub->vmhub_funcs->get_invalidate_req(vmid, flush_type);
        u32 tmp;
        /* Use register 17 for GART */
        const unsigned eng = 17;
        unsigned int i;
        unsigned char hub_ip = 0;

        hub_ip = (vmhub == AMDGPU_GFXHUB(0)) ?
                   GC_HWIP : MMHUB_HWIP;

        spin_lock(&adev->gmc.invalidate_lock);
        /*
         * It may lose gpuvm invalidate acknowldege state across power-gating
         * off cycle, add semaphore acquire before invalidation and semaphore
         * release after invalidation to avoid entering power gated state
         * to WA the Issue
         */

        /* TODO: It needs to continue working on debugging with semaphore for GFXHUB as well. */
        if (use_semaphore) {
                for (i = 0; i < adev->usec_timeout; i++) {
                        /* a read return value of 1 means semaphore acuqire */
                        tmp = RREG32_RLC_NO_KIQ(hub->vm_inv_eng0_sem +
                                            hub->eng_distance * eng, hub_ip);
                        if (tmp & 0x1)
                                break;
                        udelay(1);
                }

                if (i >= adev->usec_timeout)
                        dev_err(adev->dev,
                                "Timeout waiting for sem acquire in VM flush!\n");
        }

        WREG32_RLC_NO_KIQ(hub->vm_inv_eng0_req + hub->eng_distance * eng, inv_req, hub_ip);

        /* Wait for ACK with a delay.*/
        for (i = 0; i < adev->usec_timeout; i++) {
                tmp = RREG32_RLC_NO_KIQ(hub->vm_inv_eng0_ack +
                                    hub->eng_distance * eng, hub_ip);
                tmp &= 1 << vmid;
                if (tmp)
                        break;

                udelay(1);
        }

        /* TODO: It needs to continue working on debugging with semaphore for GFXHUB as well. */
        if (use_semaphore)
                /*
                 * add semaphore release after invalidation,
                 * write with 0 means semaphore release
                 */
                WREG32_RLC_NO_KIQ(hub->vm_inv_eng0_sem +
                              hub->eng_distance * eng, 0, hub_ip);

        /* Issue additional private vm invalidation to MMHUB */
        if ((vmhub != AMDGPU_GFXHUB(0)) &&
            (hub->vm_l2_bank_select_reserved_cid2) &&
                !amdgpu_sriov_vf(adev)) {
                inv_req = RREG32_NO_KIQ(hub->vm_l2_bank_select_reserved_cid2);
                /* bit 25: RSERVED_CACHE_PRIVATE_INVALIDATION */
                inv_req |= (1 << 25);
                /* Issue private invalidation */
                WREG32_NO_KIQ(hub->vm_l2_bank_select_reserved_cid2, inv_req);
                /* Read back to ensure invalidation is done*/
                RREG32_NO_KIQ(hub->vm_l2_bank_select_reserved_cid2);
        }

        spin_unlock(&adev->gmc.invalidate_lock);

        if (i < adev->usec_timeout)
                return;

        dev_err(adev->dev, "Timeout waiting for VM flush ACK!\n");
}

/**
 * gmc_v12_0_flush_gpu_tlb - gart tlb flush callback
 *
 * @adev: amdgpu_device pointer
 * @vmid: vm instance to flush
 * @vmhub: which hub to flush
 * @flush_type: the flush type
 *
 * Flush the TLB for the requested page table.
 */
static void gmc_v12_0_flush_gpu_tlb(struct amdgpu_device *adev, uint32_t vmid,
                                        uint32_t vmhub, uint32_t flush_type)
{
        if ((vmhub == AMDGPU_GFXHUB(0)) && !adev->gfx.is_poweron)
                return;

        /* flush hdp cache */
        amdgpu_device_flush_hdp(adev, NULL);

        /* This is necessary for SRIOV as well as for GFXOFF to function
         * properly under bare metal
         */
        if ((adev->gfx.kiq[0].ring.sched.ready || adev->mes.ring[0].sched.ready) &&
            (amdgpu_sriov_runtime(adev) || !amdgpu_sriov_vf(adev))) {
                struct amdgpu_vmhub *hub = &adev->vmhub[vmhub];
                const unsigned eng = 17;
                u32 inv_req = hub->vmhub_funcs->get_invalidate_req(vmid, flush_type);
                u32 req = hub->vm_inv_eng0_req + hub->eng_distance * eng;
                u32 ack = hub->vm_inv_eng0_ack + hub->eng_distance * eng;

                amdgpu_gmc_fw_reg_write_reg_wait(adev, req, ack, inv_req,
                                1 << vmid, GET_INST(GC, 0));
                return;
        }

        gmc_v12_0_flush_vm_hub(adev, vmid, vmhub, 0);
        return;
}

/**
 * gmc_v12_0_flush_gpu_tlb_pasid - tlb flush via pasid
 *
 * @adev: amdgpu_device pointer
 * @pasid: pasid to be flush
 * @flush_type: the flush type
 * @all_hub: flush all hubs
 * @inst: is used to select which instance of KIQ to use for the invalidation
 *
 * Flush the TLB for the requested pasid.
 */
static void gmc_v12_0_flush_gpu_tlb_pasid(struct amdgpu_device *adev,
                                          uint16_t pasid, uint32_t flush_type,
                                          bool all_hub, uint32_t inst)
{
        uint16_t queried;
        int vmid, i;

        if (adev->enable_uni_mes && adev->mes.ring[AMDGPU_MES_SCHED_PIPE].sched.ready &&
            (adev->mes.sched_version & AMDGPU_MES_VERSION_MASK) >= 0x84) {
                struct mes_inv_tlbs_pasid_input input = {0};
                input.pasid = pasid;
                input.flush_type = flush_type;
                input.hub_id = AMDGPU_GFXHUB(0);
                /* MES will invalidate all gc_hub for the device from master */
                adev->mes.funcs->invalidate_tlbs_pasid(&adev->mes, &input);
                if (all_hub) {
                        /* Only need to invalidate mm_hub now, gfx12 only support one mmhub */
                        input.hub_id = AMDGPU_MMHUB0(0);
                        adev->mes.funcs->invalidate_tlbs_pasid(&adev->mes, &input);
                }
                return;
        }

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

                valid = gmc_v12_0_get_vmid_pasid_mapping_info(adev, vmid,
                                                              &queried);
                if (!valid || queried != pasid)
                        continue;

                if (all_hub) {
                        for_each_set_bit(i, adev->vmhubs_mask,
                                         AMDGPU_MAX_VMHUBS)
                                gmc_v12_0_flush_gpu_tlb(adev, vmid, i,
                                                        flush_type);
                } else {
                        gmc_v12_0_flush_gpu_tlb(adev, vmid, AMDGPU_GFXHUB(0),
                                                flush_type);
                }
        }
}

static uint64_t gmc_v12_0_emit_flush_gpu_tlb(struct amdgpu_ring *ring,
                                             unsigned vmid, uint64_t pd_addr)
{
        bool use_semaphore = gmc_v12_0_use_invalidate_semaphore(ring->adev, ring->vm_hub);
        struct amdgpu_vmhub *hub = &ring->adev->vmhub[ring->vm_hub];
        uint32_t req = hub->vmhub_funcs->get_invalidate_req(vmid, 0);
        unsigned eng = ring->vm_inv_eng;

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

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

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

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

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

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

        return pd_addr;
}

static void gmc_v12_0_emit_pasid_mapping(struct amdgpu_ring *ring, unsigned vmid,
                                         unsigned pasid)
{
        struct amdgpu_device *adev = ring->adev;
        uint32_t reg;

        if (ring->vm_hub == AMDGPU_GFXHUB(0))
                reg = SOC15_REG_OFFSET(OSSSYS, 0, regIH_VMID_0_LUT) + vmid;
        else
                reg = SOC15_REG_OFFSET(OSSSYS, 0, regIH_VMID_0_LUT_MM) + vmid;

        amdgpu_ring_emit_wreg(ring, reg, pasid);
}

/*
 * PTE format:
 * 63 P
 * 62:59 reserved
 * 58 D
 * 57 G
 * 56 T
 * 55:54 M
 * 53:52 SW
 * 51:48 reserved for future
 * 47:12 4k physical page base address
 * 11:7 fragment
 * 6 write
 * 5 read
 * 4 exe
 * 3 Z
 * 2 snooped
 * 1 system
 * 0 valid
 *
 * PDE format:
 * 63 P
 * 62:58 block fragment size
 * 57 reserved
 * 56 A
 * 55:54 M
 * 53:52 reserved
 * 51:48 reserved for future
 * 47:6 physical base address of PD or PTE
 * 5:3 reserved
 * 2 C
 * 1 system
 * 0 valid
 */

static void gmc_v12_0_get_vm_pde(struct amdgpu_device *adev, int level,
                                 uint64_t *addr, uint64_t *flags)
{
        if (!(*flags & AMDGPU_PDE_PTE_GFX12) && !(*flags & AMDGPU_PTE_SYSTEM))
                *addr = adev->vm_manager.vram_base_offset + *addr -
                        adev->gmc.vram_start;
        BUG_ON(*addr & 0xFFFF00000000003FULL);

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

        if (level == AMDGPU_VM_PDB1) {
                /* Set the block fragment size */
                if (!(*flags & AMDGPU_PDE_PTE_GFX12))
                        *flags |= AMDGPU_PDE_BFS_GFX12(0x9);

        } else if (level == AMDGPU_VM_PDB0) {
                if (*flags & AMDGPU_PDE_PTE_GFX12)
                        *flags &= ~AMDGPU_PDE_PTE_GFX12;
        }
}

static void gmc_v12_0_get_vm_pte(struct amdgpu_device *adev,
                                 struct amdgpu_vm *vm,
                                 struct amdgpu_bo *bo,
                                 uint32_t vm_flags,
                                 uint64_t *flags)
{
        if (vm_flags & AMDGPU_VM_PAGE_EXECUTABLE)
                *flags |= AMDGPU_PTE_EXECUTABLE;
        else
                *flags &= ~AMDGPU_PTE_EXECUTABLE;

        switch (vm_flags & AMDGPU_VM_MTYPE_MASK) {
        case AMDGPU_VM_MTYPE_DEFAULT:
                *flags = AMDGPU_PTE_MTYPE_GFX12(*flags, MTYPE_NC);
                break;
        case AMDGPU_VM_MTYPE_NC:
        default:
                *flags = AMDGPU_PTE_MTYPE_GFX12(*flags, MTYPE_NC);
                break;
        case AMDGPU_VM_MTYPE_UC:
                *flags = AMDGPU_PTE_MTYPE_GFX12(*flags, MTYPE_UC);
                break;
        }

        if (vm_flags & AMDGPU_VM_PAGE_NOALLOC)
                *flags |= AMDGPU_PTE_NOALLOC;
        else
                *flags &= ~AMDGPU_PTE_NOALLOC;

        if (vm_flags & AMDGPU_VM_PAGE_PRT) {
                *flags |= AMDGPU_PTE_PRT_GFX12;
                *flags |= AMDGPU_PTE_SNOOPED;
                *flags |= AMDGPU_PTE_SYSTEM;
                *flags |= AMDGPU_PTE_IS_PTE;
                *flags &= ~AMDGPU_PTE_VALID;
        }

        if (bo && bo->flags & AMDGPU_GEM_CREATE_GFX12_DCC)
                *flags |= AMDGPU_PTE_DCC;

        if (bo && bo->flags & AMDGPU_GEM_CREATE_UNCACHED)
                *flags = AMDGPU_PTE_MTYPE_GFX12(*flags, MTYPE_UC);
}

static unsigned gmc_v12_0_get_vbios_fb_size(struct amdgpu_device *adev)
{
        return 0;
}

static unsigned int gmc_v12_0_get_dcc_alignment(struct amdgpu_device *adev)
{
        unsigned int max_tex_channel_caches, alignment;

        if (amdgpu_ip_version(adev, GC_HWIP, 0) != IP_VERSION(12, 0, 0) &&
            amdgpu_ip_version(adev, GC_HWIP, 0) != IP_VERSION(12, 0, 1))
                return 0;

        max_tex_channel_caches = adev->gfx.config.max_texture_channel_caches;
        if (is_power_of_2(max_tex_channel_caches))
                alignment = (unsigned int)(max_tex_channel_caches / SZ_4);
        else
                alignment = roundup_pow_of_two(max_tex_channel_caches);

        return (unsigned int)(alignment * max_tex_channel_caches * SZ_1K);
}

static const struct amdgpu_gmc_funcs gmc_v12_0_gmc_funcs = {
        .flush_gpu_tlb = gmc_v12_0_flush_gpu_tlb,
        .flush_gpu_tlb_pasid = gmc_v12_0_flush_gpu_tlb_pasid,
        .emit_flush_gpu_tlb = gmc_v12_0_emit_flush_gpu_tlb,
        .emit_pasid_mapping = gmc_v12_0_emit_pasid_mapping,
        .get_vm_pde = gmc_v12_0_get_vm_pde,
        .get_vm_pte = gmc_v12_0_get_vm_pte,
        .get_vbios_fb_size = gmc_v12_0_get_vbios_fb_size,
        .get_dcc_alignment = gmc_v12_0_get_dcc_alignment,
};

static void gmc_v12_0_set_gmc_funcs(struct amdgpu_device *adev)
{
        adev->gmc.gmc_funcs = &gmc_v12_0_gmc_funcs;
}

static void gmc_v12_0_set_umc_funcs(struct amdgpu_device *adev)
{
        switch (amdgpu_ip_version(adev, UMC_HWIP, 0)) {
        case IP_VERSION(8, 14, 0):
                adev->umc.channel_inst_num = UMC_V8_14_CHANNEL_INSTANCE_NUM;
                adev->umc.umc_inst_num = UMC_V8_14_UMC_INSTANCE_NUM(adev);
                adev->umc.node_inst_num = 0;
                adev->umc.max_ras_err_cnt_per_query = UMC_V8_14_TOTAL_CHANNEL_NUM(adev);
                adev->umc.channel_offs = UMC_V8_14_PER_CHANNEL_OFFSET;
                adev->umc.ras = &umc_v8_14_ras;
                break;
        default:
                break;
        }
}


static void gmc_v12_0_set_mmhub_funcs(struct amdgpu_device *adev)
{
        switch (amdgpu_ip_version(adev, MMHUB_HWIP, 0)) {
        case IP_VERSION(4, 1, 0):
                adev->mmhub.funcs = &mmhub_v4_1_0_funcs;
                break;
        case IP_VERSION(4, 2, 0):
                adev->mmhub.funcs = &mmhub_v4_2_0_funcs;
                break;
        default:
                break;
        }
}

static void gmc_v12_0_set_gfxhub_funcs(struct amdgpu_device *adev)
{
        switch (amdgpu_ip_version(adev, GC_HWIP, 0)) {
        case IP_VERSION(12, 0, 0):
        case IP_VERSION(12, 0, 1):
                adev->gfxhub.funcs = &gfxhub_v12_0_funcs;
                break;
        case IP_VERSION(12, 1, 0):
                adev->gfxhub.funcs = &gfxhub_v12_1_funcs;
                break;
        default:
                break;
        }
}

static int gmc_v12_0_early_init(struct amdgpu_ip_block *ip_block)
{
        struct amdgpu_device *adev = ip_block->adev;

        switch (amdgpu_ip_version(adev, GC_HWIP, 0)) {
        case IP_VERSION(12, 1, 0):
                gmc_v12_1_set_gmc_funcs(adev);
                gmc_v12_1_set_irq_funcs(adev);
                adev->gmc.init_pte_flags = AMDGPU_PTE_IS_PTE;
                break;
        default:
                gmc_v12_0_set_gmc_funcs(adev);
                gmc_v12_0_set_irq_funcs(adev);
                break;
        }
        gmc_v12_0_set_gfxhub_funcs(adev);
        gmc_v12_0_set_mmhub_funcs(adev);
        gmc_v12_0_set_umc_funcs(adev);

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

        return 0;
}

static int gmc_v12_0_late_init(struct amdgpu_ip_block *ip_block)
{
        struct amdgpu_device *adev = ip_block->adev;
        int r;

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

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

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

static void gmc_v12_0_vram_gtt_location(struct amdgpu_device *adev,
                                        struct amdgpu_gmc *mc)
{
        u64 base = 0;

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

        amdgpu_gmc_set_agp_default(adev, mc);
        amdgpu_gmc_vram_location(adev, &adev->gmc, base);
        amdgpu_gmc_gart_location(adev, mc, AMDGPU_GART_PLACEMENT_LOW);
        if (!amdgpu_sriov_vf(adev) && (amdgpu_agp == 1))
                amdgpu_gmc_agp_location(adev, mc);

        /* base offset of vram pages */
        if (amdgpu_sriov_vf(adev))
                adev->vm_manager.vram_base_offset = 0;
        else
                adev->vm_manager.vram_base_offset = adev->mmhub.funcs->get_mc_fb_offset(adev);
}

/**
 * gmc_v12_0_mc_init - initialize the memory controller driver params
 *
 * @adev: amdgpu_device pointer
 *
 * Look up the amount of vram, vram width, and decide how to place
 * vram and gart within the GPU's physical address space.
 * Returns 0 for success.
 */
static int gmc_v12_0_mc_init(struct amdgpu_device *adev)
{
        int r;

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

        if (!(adev->flags & AMD_IS_APU)) {
                r = amdgpu_device_resize_fb_bar(adev);
                if (r)
                        return r;
        }

        adev->gmc.aper_base = pci_resource_start(adev->pdev, 0);
        adev->gmc.aper_size = pci_resource_len(adev->pdev, 0);

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

        /* set the gart size */
        if (amdgpu_gart_size == -1) {
                adev->gmc.gart_size = 512ULL << 20;
        } else
                adev->gmc.gart_size = (u64)amdgpu_gart_size << 20;

        gmc_v12_0_vram_gtt_location(adev, &adev->gmc);

        return 0;
}

static int gmc_v12_0_gart_init(struct amdgpu_device *adev)
{
        int r;

        if (adev->gart.bo) {
                WARN(1, "PCIE GART already initialized\n");
                return 0;
        }

        /* Initialize common gart structure */
        r = amdgpu_gart_init(adev);
        if (r)
                return r;

        adev->gart.table_size = adev->gart.num_gpu_pages * 8;
        adev->gart.gart_pte_flags = AMDGPU_PTE_MTYPE_GFX12(0ULL, MTYPE_UC) |
                                    AMDGPU_PTE_EXECUTABLE |
                                    AMDGPU_PTE_IS_PTE;

        return amdgpu_gart_table_vram_alloc(adev);
}

static int gmc_v12_0_sw_init(struct amdgpu_ip_block *ip_block)
{
        int r, vram_width = 0, vram_type = 0, vram_vendor = 0;
        struct amdgpu_device *adev = ip_block->adev;
        int i;

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

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

        spin_lock_init(&adev->gmc.invalidate_lock);

        if (amdgpu_ip_version(adev, GC_HWIP, 0) == IP_VERSION(12, 1, 0)) {
                gmc_v12_1_init_vram_info(adev);
        } else {
                r = amdgpu_atomfirmware_get_vram_info(adev,
                              &vram_width, &vram_type, &vram_vendor);
                adev->gmc.vram_width = vram_width;
                adev->gmc.vram_type = vram_type;
                adev->gmc.vram_vendor = vram_vendor;
        }

        switch (amdgpu_ip_version(adev, GC_HWIP, 0)) {
        case IP_VERSION(12, 0, 0):
        case IP_VERSION(12, 0, 1):
                set_bit(AMDGPU_GFXHUB(0), adev->vmhubs_mask);
                set_bit(AMDGPU_MMHUB0(0), adev->vmhubs_mask);
                /*
                 * To fulfill 4-level page support,
                 * vm size is 256TB (48bit), maximum size,
                 * block size 512 (9bit)
                 */
                amdgpu_vm_adjust_size(adev, 256 * 1024, 9, 3, 48);
                break;
        case IP_VERSION(12, 1, 0):
                bitmap_set(adev->vmhubs_mask, AMDGPU_GFXHUB(0),
                                NUM_XCC(adev->gfx.xcc_mask));
                for (i = 0; i < hweight32(adev->aid_mask); i++)
                        set_bit(AMDGPU_MMHUB0(i), adev->vmhubs_mask);
                /*
                 * To fulfill 5-level page support,
                 * vm size is 128PetaByte (57bit), maximum size,
                 * block size 512 (9bit)
                 */
                amdgpu_vm_adjust_size(adev, 128 * 1024 * 1024, 9, 4, 57);
                break;
        default:
                break;
        }

        /* This interrupt is VMC page fault.*/
        r = amdgpu_irq_add_id(adev, SOC21_IH_CLIENTID_VMC,
                              VMC_1_0__SRCID__VM_FAULT,
                              &adev->gmc.vm_fault);

        if (r)
                return r;

        if (amdgpu_ip_version(adev, GC_HWIP, 0) == IP_VERSION(12, 1, 0)) {
                r = amdgpu_irq_add_id(adev, SOC21_IH_CLIENTID_UTCL2,
                                      UTCL2_1_0__SRCID__FAULT,
                                      &adev->gmc.vm_fault);
                if (r)
                        return r;
                /* Add GCVM UTCL2 Retry fault */
                r = amdgpu_irq_add_id(adev, SOC21_IH_CLIENTID_UTCL2,
                                      UTCL2_1_0__SRCID__RETRY,
                                      &adev->gmc.vm_fault);
                if (r)
                        return r;

                /* Add MMVM UTCL2 Retry fault */
                r = amdgpu_irq_add_id(adev, SOC21_IH_CLIENTID_VMC,
                                      VMC_1_0__SRCID__VM_RETRY,
                                      &adev->gmc.vm_fault);
        } else {
                r = amdgpu_irq_add_id(adev, SOC21_IH_CLIENTID_GFX,
                                      UTCL2_1_0__SRCID__FAULT,
                                      &adev->gmc.vm_fault);
        }
        if (r)
                return r;

        if ((amdgpu_ip_version(adev, GC_HWIP, 0) != IP_VERSION(12, 1, 0)) &&
            !amdgpu_sriov_vf(adev)) {
                /* interrupt sent to DF. */
                r = amdgpu_irq_add_id(adev, SOC21_IH_CLIENTID_DF, 0,
                                      &adev->gmc.ecc_irq);
                if (r)
                        return r;
        }

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

        r = dma_set_mask_and_coherent(adev->dev, DMA_BIT_MASK(44));
        if (r) {
                drm_warn(adev_to_drm(adev), "No suitable DMA available.\n");
                return r;
        }

        adev->need_swiotlb = drm_need_swiotlb(44);

        r = gmc_v12_0_mc_init(adev);
        if (r)
                return r;

        amdgpu_gmc_get_vbios_allocations(adev);

#ifdef HAVE_ACPI_DEV_GET_FIRST_MATCH_DEV
        if (amdgpu_ip_version(adev, GC_HWIP, 0) == IP_VERSION(12, 1, 0)) {
                r = amdgpu_gmc_init_mem_ranges(adev);
                if (r)
                        return r;
        }
#endif

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

        r = gmc_v12_0_gart_init(adev);
        if (r)
                return r;

        /*
         * 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.first_kfd_vmid =
                 amdgpu_ip_version(adev, GC_HWIP, 0) == IP_VERSION(12, 1, 0) ?
                3 : 8;
        adev->vm_manager.first_kfd_vmid =
                adev->gfx.disable_kq ? 1 : (adev->vm_manager.first_kfd_vmid);

        amdgpu_vm_manager_init(adev);

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

        return 0;
}

/**
 * gmc_v12_0_gart_fini - vm fini callback
 *
 * @adev: amdgpu_device pointer
 *
 * Tears down the driver GART/VM setup (CIK).
 */
static void gmc_v12_0_gart_fini(struct amdgpu_device *adev)
{
        amdgpu_gart_table_vram_free(adev);
}

static int gmc_v12_0_sw_fini(struct amdgpu_ip_block *ip_block)
{
        struct amdgpu_device *adev = ip_block->adev;

        amdgpu_vm_manager_fini(adev);
        gmc_v12_0_gart_fini(adev);
        amdgpu_gem_force_release(adev);
        amdgpu_bo_fini(adev);

        return 0;
}

static void gmc_v12_0_init_golden_registers(struct amdgpu_device *adev)
{
}

/**
 * gmc_v12_0_gart_enable - gart enable
 *
 * @adev: amdgpu_device pointer
 */
static int gmc_v12_0_gart_enable(struct amdgpu_device *adev)
{
        int r;
        bool value;

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

        amdgpu_gtt_mgr_recover(&adev->mman.gtt_mgr);

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

        /* Flush HDP after it is initialized */
        amdgpu_device_flush_hdp(adev, NULL);

        value = amdgpu_vm_fault_stop != AMDGPU_VM_FAULT_STOP_ALWAYS;

        adev->mmhub.funcs->set_fault_enable_default(adev, value);
        adev->gmc.gmc_funcs->flush_gpu_tlb(adev, 0, AMDGPU_MMHUB0(0), 0);

        drm_info(adev_to_drm(adev), "PCIE GART of %uM enabled (table at 0x%016llX).\n",
                 (unsigned)(adev->gmc.gart_size >> 20),
                 (unsigned long long)amdgpu_bo_gpu_offset(adev->gart.bo));

        return 0;
}

static int gmc_v12_0_hw_init(struct amdgpu_ip_block *ip_block)
{
        int r;
        struct amdgpu_device *adev = ip_block->adev;

        /* The sequence of these two function calls matters.*/
        gmc_v12_0_init_golden_registers(adev);

        r = gmc_v12_0_gart_enable(adev);
        if (r)
                return r;

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

        return 0;
}

/**
 * gmc_v12_0_gart_disable - gart disable
 *
 * @adev: amdgpu_device pointer
 *
 * This disables all VM page table.
 */
static void gmc_v12_0_gart_disable(struct amdgpu_device *adev)
{
        adev->mmhub.funcs->gart_disable(adev);
}

static int gmc_v12_0_hw_fini(struct amdgpu_ip_block *ip_block)
{
        struct amdgpu_device *adev = ip_block->adev;

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

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

        if (adev->gmc.ecc_irq.funcs &&
                amdgpu_ras_is_supported(adev, AMDGPU_RAS_BLOCK__UMC))
                amdgpu_irq_put(adev, &adev->gmc.ecc_irq, 0);

        gmc_v12_0_gart_disable(adev);

        return 0;
}

static int gmc_v12_0_suspend(struct amdgpu_ip_block *ip_block)
{
        gmc_v12_0_hw_fini(ip_block);

        return 0;
}

static int gmc_v12_0_resume(struct amdgpu_ip_block *ip_block)
{
        int r;

        r = gmc_v12_0_hw_init(ip_block);
        if (r)
                return r;

        amdgpu_vmid_reset_all(ip_block->adev);

        return 0;
}

static bool gmc_v12_0_is_idle(struct amdgpu_ip_block *ip_block)
{
        /* MC is always ready in GMC v11.*/
        return true;
}

static int gmc_v12_0_wait_for_idle(struct amdgpu_ip_block *ip_block)
{
        /* There is no need to wait for MC idle in GMC v11.*/
        return 0;
}

static int gmc_v12_0_set_clockgating_state(struct amdgpu_ip_block *ip_block,
                                           enum amd_clockgating_state state)
{
        int r;
        struct amdgpu_device *adev = ip_block->adev;

        r = adev->mmhub.funcs->set_clockgating(adev, state);
        if (r)
                return r;

        if (amdgpu_ip_version(adev, GC_HWIP, 0) != IP_VERSION(12, 1, 0))
                return athub_v4_1_0_set_clockgating(adev, state);
        else
                return 0;
}

static void gmc_v12_0_get_clockgating_state(struct amdgpu_ip_block *ip_block, u64 *flags)
{
        struct amdgpu_device *adev = ip_block->adev;

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

        if (amdgpu_ip_version(adev, GC_HWIP, 0) != IP_VERSION(12, 1, 0))
                athub_v4_1_0_get_clockgating(adev, flags);
}

static int gmc_v12_0_set_powergating_state(struct amdgpu_ip_block *ip_block,
                                           enum amd_powergating_state state)
{
        return 0;
}

const struct amd_ip_funcs gmc_v12_0_ip_funcs = {
        .name = "gmc_v12_0",
        .early_init = gmc_v12_0_early_init,
        .sw_init = gmc_v12_0_sw_init,
        .hw_init = gmc_v12_0_hw_init,
        .late_init = gmc_v12_0_late_init,
        .sw_fini = gmc_v12_0_sw_fini,
        .hw_fini = gmc_v12_0_hw_fini,
        .suspend = gmc_v12_0_suspend,
        .resume = gmc_v12_0_resume,
        .is_idle = gmc_v12_0_is_idle,
        .wait_for_idle = gmc_v12_0_wait_for_idle,
        .set_clockgating_state = gmc_v12_0_set_clockgating_state,
        .set_powergating_state = gmc_v12_0_set_powergating_state,
        .get_clockgating_state = gmc_v12_0_get_clockgating_state,
};

const struct amdgpu_ip_block_version gmc_v12_0_ip_block = {
        .type = AMD_IP_BLOCK_TYPE_GMC,
        .major = 12,
        .minor = 0,
        .rev = 0,
        .funcs = &gmc_v12_0_ip_funcs,
};