// SPDX-License-Identifier: GPL-2.0 OR MIT
/*
 * Copyright 2014-2022 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/ratelimit.h>
#include <linux/printk.h>
#include <linux/slab.h>
#include <linux/list.h>
#include <linux/types.h>
#include <linux/bitops.h>
#include <linux/sched.h>
#include "kfd_priv.h"
#include "kfd_device_queue_manager.h"
#include "kfd_mqd_manager.h"
#include "cik_regs.h"
#include "kfd_kernel_queue.h"
#include "amdgpu_amdkfd.h"
#include "amdgpu_reset.h"
#include "amdgpu_sdma.h"
#include "mes_v11_api_def.h"
#include "kfd_debug.h"

/* Size of the per-pipe EOP queue */
#define CIK_HPD_EOP_BYTES_LOG2 11
#define CIK_HPD_EOP_BYTES (1U << CIK_HPD_EOP_BYTES_LOG2)
/* See unmap_queues_cpsch() */
#define USE_DEFAULT_GRACE_PERIOD 0xffffffff

static int set_pasid_vmid_mapping(struct device_queue_manager *dqm,
                                  u32 pasid, unsigned int vmid);

static int execute_queues_cpsch(struct device_queue_manager *dqm,
                                enum kfd_unmap_queues_filter filter,
                                uint32_t filter_param,
                                uint32_t grace_period);
static int unmap_queues_cpsch(struct device_queue_manager *dqm,
                                enum kfd_unmap_queues_filter filter,
                                uint32_t filter_param,
                                uint32_t grace_period,
                                bool reset);

static int map_queues_cpsch(struct device_queue_manager *dqm);

static void deallocate_sdma_queue(struct device_queue_manager *dqm,
                                struct queue *q);

static inline void deallocate_hqd(struct device_queue_manager *dqm,
                                struct queue *q);
static int allocate_hqd(struct device_queue_manager *dqm, struct queue *q);
static int allocate_sdma_queue(struct device_queue_manager *dqm,
                                struct queue *q, const uint32_t *restore_sdma_id);

static int reset_queues_on_hws_hang(struct device_queue_manager *dqm, bool is_sdma);

static inline
enum KFD_MQD_TYPE get_mqd_type_from_queue_type(enum kfd_queue_type type)
{
        if (type == KFD_QUEUE_TYPE_SDMA || type == KFD_QUEUE_TYPE_SDMA_XGMI)
                return KFD_MQD_TYPE_SDMA;
        return KFD_MQD_TYPE_CP;
}

static bool is_pipe_enabled(struct device_queue_manager *dqm, int mec, int pipe)
{
        int i;
        int pipe_offset = (mec * dqm->dev->kfd->shared_resources.num_pipe_per_mec
                + pipe) * dqm->dev->kfd->shared_resources.num_queue_per_pipe;

        /* queue is available for KFD usage if bit is 1 */
        for (i = 0; i <  dqm->dev->kfd->shared_resources.num_queue_per_pipe; ++i)
                if (test_bit(pipe_offset + i,
                              dqm->dev->kfd->shared_resources.cp_queue_bitmap))
                        return true;
        return false;
}

unsigned int get_cp_queues_num(struct device_queue_manager *dqm)
{
        return bitmap_weight(dqm->dev->kfd->shared_resources.cp_queue_bitmap,
                                AMDGPU_MAX_QUEUES);
}

unsigned int get_queues_per_pipe(struct device_queue_manager *dqm)
{
        return dqm->dev->kfd->shared_resources.num_queue_per_pipe;
}

unsigned int get_pipes_per_mec(struct device_queue_manager *dqm)
{
        return dqm->dev->kfd->shared_resources.num_pipe_per_mec;
}

static unsigned int get_num_all_sdma_engines(struct device_queue_manager *dqm)
{
        return kfd_get_num_sdma_engines(dqm->dev) +
                kfd_get_num_xgmi_sdma_engines(dqm->dev);
}

unsigned int get_num_sdma_queues(struct device_queue_manager *dqm)
{
        return kfd_get_num_sdma_engines(dqm->dev) *
                dqm->dev->kfd->device_info.num_sdma_queues_per_engine;
}

unsigned int get_num_xgmi_sdma_queues(struct device_queue_manager *dqm)
{
        return kfd_get_num_xgmi_sdma_engines(dqm->dev) *
                dqm->dev->kfd->device_info.num_sdma_queues_per_engine;
}

static void init_sdma_bitmaps(struct device_queue_manager *dqm)
{
        bitmap_zero(dqm->sdma_bitmap, KFD_MAX_SDMA_QUEUES);
        bitmap_set(dqm->sdma_bitmap, 0, get_num_sdma_queues(dqm));

        bitmap_zero(dqm->xgmi_sdma_bitmap, KFD_MAX_SDMA_QUEUES);
        bitmap_set(dqm->xgmi_sdma_bitmap, 0, get_num_xgmi_sdma_queues(dqm));

        /* Mask out the reserved queues */
        bitmap_clear(dqm->sdma_bitmap, 0, kfd_get_num_sdma_engines(dqm->dev) *
                        dqm->dev->kfd->device_info.num_reserved_sdma_queues_per_engine);
        bitmap_clear(dqm->xgmi_sdma_bitmap, 0, kfd_get_num_xgmi_sdma_engines(dqm->dev) *
                        dqm->dev->kfd->device_info.num_reserved_sdma_queues_per_engine);
}

void program_sh_mem_settings(struct device_queue_manager *dqm,
                                        struct qcm_process_device *qpd)
{
        uint32_t xcc_mask = dqm->dev->xcc_mask;
        int xcc_id;

        for_each_inst(xcc_id, xcc_mask)
                dqm->dev->kfd2kgd->program_sh_mem_settings(
                        dqm->dev->adev, qpd->vmid, qpd->sh_mem_config,
                        qpd->sh_mem_ape1_base, qpd->sh_mem_ape1_limit,
                        qpd->sh_mem_bases, xcc_id);
}

static void kfd_hws_hang(struct device_queue_manager *dqm)
{
        struct device_process_node *cur;
        struct qcm_process_device *qpd;
        struct queue *q;

        /* Mark all device queues as reset. */
        list_for_each_entry(cur, &dqm->queues, list) {
                qpd = cur->qpd;
                list_for_each_entry(q, &qpd->queues_list, list) {
                        struct kfd_process_device *pdd = qpd_to_pdd(qpd);

                        pdd->has_reset_queue = true;
                }
        }

        /*
         * Issue a GPU reset if HWS is unresponsive
         */
        amdgpu_amdkfd_gpu_reset(dqm->dev->adev);
}

static int convert_to_mes_queue_type(int queue_type)
{
        int mes_queue_type;

        switch (queue_type) {
        case KFD_QUEUE_TYPE_COMPUTE:
                mes_queue_type = MES_QUEUE_TYPE_COMPUTE;
                break;
        case KFD_QUEUE_TYPE_SDMA:
                mes_queue_type = MES_QUEUE_TYPE_SDMA;
                break;
        default:
                WARN(1, "Invalid queue type %d", queue_type);
                mes_queue_type = -EINVAL;
                break;
        }

        return mes_queue_type;
}

static int add_queue_mes(struct device_queue_manager *dqm, struct queue *q,
                         struct qcm_process_device *qpd)
{
        struct amdgpu_device *adev = (struct amdgpu_device *)dqm->dev->adev;
        struct kfd_process_device *pdd = qpd_to_pdd(qpd);
        struct mes_add_queue_input queue_input;
        int r, queue_type;
        uint64_t wptr_addr_off;

        if (!dqm->sched_running || dqm->sched_halt)
                return 0;
        if (!down_read_trylock(&adev->reset_domain->sem))
                return -EIO;

        memset(&queue_input, 0x0, sizeof(struct mes_add_queue_input));
        queue_input.process_id = pdd->pasid;
        queue_input.page_table_base_addr =  qpd->page_table_base;
        queue_input.process_va_start = 0;
        queue_input.process_va_end = adev->vm_manager.max_pfn - 1;
        /* MES unit for quantum is 100ns */
        queue_input.process_quantum = KFD_MES_PROCESS_QUANTUM;  /* Equivalent to 10ms. */
        queue_input.process_context_addr = pdd->proc_ctx_gpu_addr;
        queue_input.gang_quantum = KFD_MES_GANG_QUANTUM; /* Equivalent to 1ms */
        queue_input.gang_context_addr = q->gang_ctx_gpu_addr;
        queue_input.inprocess_gang_priority = q->properties.priority;
        queue_input.gang_global_priority_level =
                                        AMDGPU_MES_PRIORITY_LEVEL_NORMAL;
        queue_input.doorbell_offset = q->properties.doorbell_off;
        queue_input.mqd_addr = q->gart_mqd_addr;
        queue_input.wptr_addr = (uint64_t)q->properties.write_ptr;

        wptr_addr_off = (uint64_t)q->properties.write_ptr & (PAGE_SIZE - 1);
        queue_input.wptr_mc_addr = amdgpu_bo_gpu_offset(q->properties.wptr_bo) + wptr_addr_off;

        queue_input.is_kfd_process = 1;
        queue_input.is_aql_queue = (q->properties.format == KFD_QUEUE_FORMAT_AQL);
        queue_input.queue_size = q->properties.queue_size >> 2;

        queue_input.paging = false;
        queue_input.tba_addr = qpd->tba_addr;
        queue_input.tma_addr = qpd->tma_addr;
        queue_input.trap_en = !kfd_dbg_has_cwsr_workaround(q->device);
        queue_input.skip_process_ctx_clear =
                qpd->pqm->process->runtime_info.runtime_state == DEBUG_RUNTIME_STATE_ENABLED &&
                                                (qpd->pqm->process->debug_trap_enabled ||
                                                 kfd_dbg_has_ttmps_always_setup(q->device));

        queue_type = convert_to_mes_queue_type(q->properties.type);
        if (queue_type < 0) {
                dev_err(adev->dev, "Queue type not supported with MES, queue:%d\n",
                        q->properties.type);
                up_read(&adev->reset_domain->sem);
                return -EINVAL;
        }
        queue_input.queue_type = (uint32_t)queue_type;

        queue_input.exclusively_scheduled = q->properties.is_gws;
        queue_input.sh_mem_config_data = qpd->sh_mem_config;
        queue_input.vm_cntx_cntl = qpd->vm_cntx_cntl;
        queue_input.xcc_id = ffs(dqm->dev->xcc_mask) - 1;

        amdgpu_mes_lock(&adev->mes);
        r = adev->mes.funcs->add_hw_queue(&adev->mes, &queue_input);
        amdgpu_mes_unlock(&adev->mes);
        up_read(&adev->reset_domain->sem);
        if (r) {
                dev_err(adev->dev, "failed to add hardware queue to MES, doorbell=0x%x\n",
                        q->properties.doorbell_off);
                dev_err(adev->dev, "MES might be in unrecoverable state, issue a GPU reset\n");
                kfd_hws_hang(dqm);
        }

        return r;
}

static int remove_queue_mes(struct device_queue_manager *dqm, struct queue *q,
                        struct qcm_process_device *qpd)
{
        struct amdgpu_device *adev = (struct amdgpu_device *)dqm->dev->adev;
        int r;
        struct mes_remove_queue_input queue_input;

        if (!dqm->sched_running || dqm->sched_halt)
                return 0;
        if (!down_read_trylock(&adev->reset_domain->sem))
                return -EIO;

        memset(&queue_input, 0x0, sizeof(struct mes_remove_queue_input));
        queue_input.doorbell_offset = q->properties.doorbell_off;
        queue_input.gang_context_addr = q->gang_ctx_gpu_addr;
        queue_input.xcc_id = ffs(dqm->dev->xcc_mask) - 1;

        amdgpu_mes_lock(&adev->mes);
        r = adev->mes.funcs->remove_hw_queue(&adev->mes, &queue_input);
        amdgpu_mes_unlock(&adev->mes);
        up_read(&adev->reset_domain->sem);

        if (r) {
                dev_err(adev->dev, "failed to remove hardware queue from MES, doorbell=0x%x\n",
                        q->properties.doorbell_off);
                dev_err(adev->dev, "MES might be in unrecoverable state, issue a GPU reset\n");
                kfd_hws_hang(dqm);
        }

        return r;
}

static int remove_all_kfd_queues_mes(struct device_queue_manager *dqm)
{
        struct device_process_node *cur;
        struct device *dev = dqm->dev->adev->dev;
        struct qcm_process_device *qpd;
        struct queue *q;
        int retval = 0;

        list_for_each_entry(cur, &dqm->queues, list) {
                qpd = cur->qpd;
                list_for_each_entry(q, &qpd->queues_list, list) {
                        if (q->properties.is_active) {
                                retval = remove_queue_mes(dqm, q, qpd);
                                if (retval) {
                                        dev_err(dev, "%s: Failed to remove queue %d for dev %d",
                                                __func__,
                                                q->properties.queue_id,
                                                dqm->dev->id);
                                        return retval;
                                }
                        }
                }
        }

        return retval;
}

static int add_all_kfd_queues_mes(struct device_queue_manager *dqm)
{
        struct device_process_node *cur;
        struct device *dev = dqm->dev->adev->dev;
        struct qcm_process_device *qpd;
        struct queue *q;
        int retval = 0;

        list_for_each_entry(cur, &dqm->queues, list) {
                qpd = cur->qpd;
                list_for_each_entry(q, &qpd->queues_list, list) {
                        if (!q->properties.is_active)
                                continue;
                        retval = add_queue_mes(dqm, q, qpd);
                        if (retval) {
                                dev_err(dev, "%s: Failed to add queue %d for dev %d",
                                        __func__,
                                        q->properties.queue_id,
                                        dqm->dev->id);
                                return retval;
                        }
                }
        }

        return retval;
}

static int suspend_all_queues_mes(struct device_queue_manager *dqm)
{
        struct amdgpu_device *adev = (struct amdgpu_device *)dqm->dev->adev;
        int r = 0;

        if (!down_read_trylock(&adev->reset_domain->sem))
                return -EIO;

        r = amdgpu_mes_suspend(adev);
        up_read(&adev->reset_domain->sem);

        if (r) {
                dev_err(adev->dev, "failed to suspend gangs from MES\n");
                dev_err(adev->dev, "MES might be in unrecoverable state, issue a GPU reset\n");
                kfd_hws_hang(dqm);
        }

        return r;
}

static int resume_all_queues_mes(struct device_queue_manager *dqm)
{
        struct amdgpu_device *adev = (struct amdgpu_device *)dqm->dev->adev;
        int r = 0;

        if (!down_read_trylock(&adev->reset_domain->sem))
                return -EIO;

        r = amdgpu_mes_resume(adev);
        up_read(&adev->reset_domain->sem);

        if (r) {
                dev_err(adev->dev, "failed to resume gangs from MES\n");
                dev_err(adev->dev, "MES might be in unrecoverable state, issue a GPU reset\n");
                kfd_hws_hang(dqm);
        }

        return r;
}

static void increment_queue_count(struct device_queue_manager *dqm,
                                  struct qcm_process_device *qpd,
                                  struct queue *q)
{
        dqm->active_queue_count++;
        if (q->properties.type == KFD_QUEUE_TYPE_COMPUTE)
                dqm->active_cp_queue_count++;

        if (q->properties.is_gws) {
                dqm->gws_queue_count++;
                qpd->mapped_gws_queue = true;
        }
}

static void decrement_queue_count(struct device_queue_manager *dqm,
                                  struct qcm_process_device *qpd,
                                  struct queue *q)
{
        dqm->active_queue_count--;
        if (q->properties.type == KFD_QUEUE_TYPE_COMPUTE)
                dqm->active_cp_queue_count--;

        if (q->properties.is_gws) {
                dqm->gws_queue_count--;
                qpd->mapped_gws_queue = false;
        }
}

/*
 * Allocate a doorbell ID to this queue.
 * If doorbell_id is passed in, make sure requested ID is valid then allocate it.
 */
static int allocate_doorbell(struct qcm_process_device *qpd,
                             struct queue *q,
                             uint32_t const *restore_id)
{
        struct kfd_node *dev = qpd->dqm->dev;

        if (!KFD_IS_SOC15(dev)) {
                /* On pre-SOC15 chips we need to use the queue ID to
                 * preserve the user mode ABI.
                 */

                if (restore_id && *restore_id != q->properties.queue_id)
                        return -EINVAL;

                q->doorbell_id = q->properties.queue_id;
        } else if (q->properties.type == KFD_QUEUE_TYPE_SDMA ||
                        q->properties.type == KFD_QUEUE_TYPE_SDMA_XGMI) {
                /* For SDMA queues on SOC15 with 8-byte doorbell, use static
                 * doorbell assignments based on the engine and queue id.
                 * The doobell index distance between RLC (2*i) and (2*i+1)
                 * for a SDMA engine is 512.
                 */

                uint32_t *idx_offset = dev->kfd->shared_resources.sdma_doorbell_idx;

                /*
                 * q->properties.sdma_engine_id corresponds to the virtual
                 * sdma engine number. However, for doorbell allocation,
                 * we need the physical sdma engine id in order to get the
                 * correct doorbell offset.
                 */
                uint32_t valid_id = idx_offset[qpd->dqm->dev->node_id *
                                               get_num_all_sdma_engines(qpd->dqm) +
                                               q->properties.sdma_engine_id]
                                                + (q->properties.sdma_queue_id & 1)
                                                * KFD_QUEUE_DOORBELL_MIRROR_OFFSET
                                                + (q->properties.sdma_queue_id >> 1);

                if (restore_id && *restore_id != valid_id)
                        return -EINVAL;
                q->doorbell_id = valid_id;
        } else {
                /* For CP queues on SOC15 */
                if (restore_id) {
                        /* make sure that ID is free  */
                        if (__test_and_set_bit(*restore_id, qpd->doorbell_bitmap))
                                return -EINVAL;

                        q->doorbell_id = *restore_id;
                } else {
                        /* or reserve a free doorbell ID */
                        unsigned int found;

                        found = find_first_zero_bit(qpd->doorbell_bitmap,
                                                    KFD_MAX_NUM_OF_QUEUES_PER_PROCESS);
                        if (found >= KFD_MAX_NUM_OF_QUEUES_PER_PROCESS) {
                                pr_debug("No doorbells available");
                                return -EBUSY;
                        }
                        set_bit(found, qpd->doorbell_bitmap);
                        q->doorbell_id = found;
                }
        }

        q->properties.doorbell_off = amdgpu_doorbell_index_on_bar(dev->adev,
                                                                  qpd->proc_doorbells,
                                                                  q->doorbell_id,
                                                                  dev->kfd->device_info.doorbell_size);
        return 0;
}

static void deallocate_doorbell(struct qcm_process_device *qpd,
                                struct queue *q)
{
        unsigned int old;
        struct kfd_node *dev = qpd->dqm->dev;

        if (!KFD_IS_SOC15(dev) ||
            q->properties.type == KFD_QUEUE_TYPE_SDMA ||
            q->properties.type == KFD_QUEUE_TYPE_SDMA_XGMI)
                return;

        old = test_and_clear_bit(q->doorbell_id, qpd->doorbell_bitmap);
        WARN_ON(!old);
}

static void program_trap_handler_settings(struct device_queue_manager *dqm,
                                struct qcm_process_device *qpd)
{
        uint32_t xcc_mask = dqm->dev->xcc_mask;
        int xcc_id;

        if (dqm->dev->kfd2kgd->program_trap_handler_settings)
                for_each_inst(xcc_id, xcc_mask)
                        dqm->dev->kfd2kgd->program_trap_handler_settings(
                                dqm->dev->adev, qpd->vmid, qpd->tba_addr,
                                qpd->tma_addr, xcc_id);
}

static int allocate_vmid(struct device_queue_manager *dqm,
                        struct qcm_process_device *qpd,
                        struct queue *q)
{
        struct kfd_process_device *pdd = qpd_to_pdd(qpd);
        struct device *dev = dqm->dev->adev->dev;
        int allocated_vmid = -1, i;

        for (i = dqm->dev->vm_info.first_vmid_kfd;
                        i <= dqm->dev->vm_info.last_vmid_kfd; i++) {
                if (!dqm->vmid_pasid[i]) {
                        allocated_vmid = i;
                        break;
                }
        }

        if (allocated_vmid < 0) {
                dev_err(dev, "no more vmid to allocate\n");
                return -ENOSPC;
        }

        pr_debug("vmid allocated: %d\n", allocated_vmid);

        dqm->vmid_pasid[allocated_vmid] = pdd->pasid;

        set_pasid_vmid_mapping(dqm, pdd->pasid, allocated_vmid);

        qpd->vmid = allocated_vmid;
        q->properties.vmid = allocated_vmid;

        program_sh_mem_settings(dqm, qpd);

        if (KFD_IS_SOC15(dqm->dev) && dqm->dev->kfd->cwsr_enabled)
                program_trap_handler_settings(dqm, qpd);

        /* qpd->page_table_base is set earlier when register_process()
         * is called, i.e. when the first queue is created.
         */
        dqm->dev->kfd2kgd->set_vm_context_page_table_base(dqm->dev->adev,
                        qpd->vmid,
                        qpd->page_table_base);
        /* invalidate the VM context after pasid and vmid mapping is set up */
        kfd_flush_tlb(qpd_to_pdd(qpd), TLB_FLUSH_LEGACY);

        if (dqm->dev->kfd2kgd->set_scratch_backing_va)
                dqm->dev->kfd2kgd->set_scratch_backing_va(dqm->dev->adev,
                                qpd->sh_hidden_private_base, qpd->vmid);

        return 0;
}

static int flush_texture_cache_nocpsch(struct kfd_node *kdev,
                                struct qcm_process_device *qpd)
{
        const struct packet_manager_funcs *pmf = qpd->dqm->packet_mgr.pmf;
        int ret;

        if (!qpd->ib_kaddr)
                return -ENOMEM;

        ret = pmf->release_mem(qpd->ib_base, (uint32_t *)qpd->ib_kaddr);
        if (ret)
                return ret;

        return amdgpu_amdkfd_submit_ib(kdev->adev, KGD_ENGINE_MEC1, qpd->vmid,
                                qpd->ib_base, (uint32_t *)qpd->ib_kaddr,
                                pmf->release_mem_size / sizeof(uint32_t));
}

static void deallocate_vmid(struct device_queue_manager *dqm,
                                struct qcm_process_device *qpd,
                                struct queue *q)
{
        struct device *dev = dqm->dev->adev->dev;

        /* On GFX v7, CP doesn't flush TC at dequeue */
        if (q->device->adev->asic_type == CHIP_HAWAII)
                if (flush_texture_cache_nocpsch(q->device, qpd))
                        dev_err(dev, "Failed to flush TC\n");

        kfd_flush_tlb(qpd_to_pdd(qpd), TLB_FLUSH_LEGACY);

        /* Release the vmid mapping */
        set_pasid_vmid_mapping(dqm, 0, qpd->vmid);
        dqm->vmid_pasid[qpd->vmid] = 0;

        qpd->vmid = 0;
        q->properties.vmid = 0;
}

static int create_queue_nocpsch(struct device_queue_manager *dqm,
                                struct queue *q,
                                struct qcm_process_device *qpd,
                                const struct kfd_criu_queue_priv_data *qd,
                                const void *restore_mqd, const void *restore_ctl_stack)
{
        struct mqd_manager *mqd_mgr;
        int retval;

        dqm_lock(dqm);

        if (dqm->total_queue_count >= max_num_of_queues_per_device) {
                pr_warn("Can't create new usermode queue because %d queues were already created\n",
                                dqm->total_queue_count);
                retval = -EPERM;
                goto out_unlock;
        }

        if (list_empty(&qpd->queues_list)) {
                retval = allocate_vmid(dqm, qpd, q);
                if (retval)
                        goto out_unlock;
        }
        q->properties.vmid = qpd->vmid;
        /*
         * Eviction state logic: mark all queues as evicted, even ones
         * not currently active. Restoring inactive queues later only
         * updates the is_evicted flag but is a no-op otherwise.
         */
        q->properties.is_evicted = !!qpd->evicted;

        q->properties.tba_addr = qpd->tba_addr;
        q->properties.tma_addr = qpd->tma_addr;

        mqd_mgr = dqm->mqd_mgrs[get_mqd_type_from_queue_type(
                        q->properties.type)];
        if (q->properties.type == KFD_QUEUE_TYPE_COMPUTE) {
                retval = allocate_hqd(dqm, q);
                if (retval)
                        goto deallocate_vmid;
                pr_debug("Loading mqd to hqd on pipe %d, queue %d\n",
                        q->pipe, q->queue);
        } else if (q->properties.type == KFD_QUEUE_TYPE_SDMA ||
                q->properties.type == KFD_QUEUE_TYPE_SDMA_XGMI) {
                retval = allocate_sdma_queue(dqm, q, qd ? &qd->sdma_id : NULL);
                if (retval)
                        goto deallocate_vmid;
                dqm->asic_ops.init_sdma_vm(dqm, q, qpd);
        }

        retval = allocate_doorbell(qpd, q, qd ? &qd->doorbell_id : NULL);
        if (retval)
                goto out_deallocate_hqd;

        /* Temporarily release dqm lock to avoid a circular lock dependency */
        dqm_unlock(dqm);
        q->mqd_mem_obj = mqd_mgr->allocate_mqd(mqd_mgr, &q->properties);
        dqm_lock(dqm);

        if (!q->mqd_mem_obj) {
                retval = -ENOMEM;
                goto out_deallocate_doorbell;
        }

        if (qd)
                mqd_mgr->restore_mqd(mqd_mgr, &q->mqd, q->mqd_mem_obj, &q->gart_mqd_addr,
                                     &q->properties, restore_mqd, restore_ctl_stack,
                                     qd->ctl_stack_size);
        else
                mqd_mgr->init_mqd(mqd_mgr, &q->mqd, q->mqd_mem_obj,
                                        &q->gart_mqd_addr, &q->properties);

        if (q->properties.is_active) {
                if (!dqm->sched_running) {
                        WARN_ONCE(1, "Load non-HWS mqd while stopped\n");
                        goto add_queue_to_list;
                }

                if (WARN(q->process->mm != current->mm,
                                        "should only run in user thread"))
                        retval = -EFAULT;
                else
                        retval = mqd_mgr->load_mqd(mqd_mgr, q->mqd, q->pipe,
                                        q->queue, &q->properties, current->mm);
                if (retval)
                        goto out_free_mqd;
        }

add_queue_to_list:
        list_add(&q->list, &qpd->queues_list);
        qpd->queue_count++;
        if (q->properties.is_active)
                increment_queue_count(dqm, qpd, q);

        /*
         * Unconditionally increment this counter, regardless of the queue's
         * type or whether the queue is active.
         */
        dqm->total_queue_count++;
        pr_debug("Total of %d queues are accountable so far\n",
                        dqm->total_queue_count);
        goto out_unlock;

out_free_mqd:
        mqd_mgr->free_mqd(mqd_mgr, q->mqd, q->mqd_mem_obj);
out_deallocate_doorbell:
        deallocate_doorbell(qpd, q);
out_deallocate_hqd:
        if (q->properties.type == KFD_QUEUE_TYPE_COMPUTE)
                deallocate_hqd(dqm, q);
        else if (q->properties.type == KFD_QUEUE_TYPE_SDMA ||
                q->properties.type == KFD_QUEUE_TYPE_SDMA_XGMI)
                deallocate_sdma_queue(dqm, q);
deallocate_vmid:
        if (list_empty(&qpd->queues_list))
                deallocate_vmid(dqm, qpd, q);
out_unlock:
        dqm_unlock(dqm);
        return retval;
}

static int allocate_hqd(struct device_queue_manager *dqm, struct queue *q)
{
        bool set;
        int pipe, bit, i;

        set = false;

        for (pipe = dqm->next_pipe_to_allocate, i = 0;
                        i < get_pipes_per_mec(dqm);
                        pipe = ((pipe + 1) % get_pipes_per_mec(dqm)), ++i) {

                if (!is_pipe_enabled(dqm, 0, pipe))
                        continue;

                if (dqm->allocated_queues[pipe] != 0) {
                        bit = ffs(dqm->allocated_queues[pipe]) - 1;
                        dqm->allocated_queues[pipe] &= ~(1 << bit);
                        q->pipe = pipe;
                        q->queue = bit;
                        set = true;
                        break;
                }
        }

        if (!set)
                return -EBUSY;

        pr_debug("hqd slot - pipe %d, queue %d\n", q->pipe, q->queue);
        /* horizontal hqd allocation */
        dqm->next_pipe_to_allocate = (pipe + 1) % get_pipes_per_mec(dqm);

        return 0;
}

static inline void deallocate_hqd(struct device_queue_manager *dqm,
                                struct queue *q)
{
        dqm->allocated_queues[q->pipe] |= (1 << q->queue);
}

#define SQ_IND_CMD_CMD_KILL             0x00000003
#define SQ_IND_CMD_MODE_BROADCAST       0x00000001

static int dbgdev_wave_reset_wavefronts(struct kfd_node *dev, struct kfd_process *p)
{
        int status = 0;
        unsigned int vmid;
        uint16_t queried_pasid;
        union SQ_CMD_BITS reg_sq_cmd;
        union GRBM_GFX_INDEX_BITS reg_gfx_index;
        struct kfd_process_device *pdd;
        int first_vmid_to_scan = dev->vm_info.first_vmid_kfd;
        int last_vmid_to_scan = dev->vm_info.last_vmid_kfd;
        uint32_t xcc_mask = dev->xcc_mask;
        int xcc_id;

        reg_sq_cmd.u32All = 0;
        reg_gfx_index.u32All = 0;

        pr_debug("Killing all process wavefronts\n");

        if (!dev->kfd2kgd->get_atc_vmid_pasid_mapping_info) {
                dev_err(dev->adev->dev, "no vmid pasid mapping supported\n");
                return -EOPNOTSUPP;
        }

        /* taking the VMID for that process on the safe way using PDD */
        pdd = kfd_get_process_device_data(dev, p);
        if (!pdd)
                return -EFAULT;

        /* Scan all registers in the range ATC_VMID8_PASID_MAPPING ..
         * ATC_VMID15_PASID_MAPPING
         * to check which VMID the current process is mapped to.
         */

        for (vmid = first_vmid_to_scan; vmid <= last_vmid_to_scan; vmid++) {
                status = dev->kfd2kgd->get_atc_vmid_pasid_mapping_info
                                (dev->adev, vmid, &queried_pasid);

                if (status && queried_pasid == pdd->pasid) {
                        pr_debug("Killing wave fronts of vmid %d and process pid %d\n",
                                        vmid, p->lead_thread->pid);
                        break;
                }
        }

        if (vmid > last_vmid_to_scan) {
                dev_err(dev->adev->dev, "Didn't find vmid for process pid %d\n",
                                p->lead_thread->pid);
                return -EFAULT;
        }

        reg_gfx_index.bits.sh_broadcast_writes = 1;
        reg_gfx_index.bits.se_broadcast_writes = 1;
        reg_gfx_index.bits.instance_broadcast_writes = 1;
        reg_sq_cmd.bits.mode = SQ_IND_CMD_MODE_BROADCAST;
        reg_sq_cmd.bits.cmd = SQ_IND_CMD_CMD_KILL;
        reg_sq_cmd.bits.vm_id = vmid;

        for_each_inst(xcc_id, xcc_mask)
                dev->kfd2kgd->wave_control_execute(
                        dev->adev, reg_gfx_index.u32All,
                        reg_sq_cmd.u32All, xcc_id);

        return 0;
}

/* Access to DQM has to be locked before calling destroy_queue_nocpsch_locked
 * to avoid asynchronized access
 */
static int destroy_queue_nocpsch_locked(struct device_queue_manager *dqm,
                                struct qcm_process_device *qpd,
                                struct queue *q)
{
        int retval;
        struct mqd_manager *mqd_mgr;

        mqd_mgr = dqm->mqd_mgrs[get_mqd_type_from_queue_type(q->properties.type)];

        if (q->properties.type == KFD_QUEUE_TYPE_COMPUTE)
                deallocate_hqd(dqm, q);
        else if (q->properties.type == KFD_QUEUE_TYPE_SDMA)
                deallocate_sdma_queue(dqm, q);
        else if (q->properties.type == KFD_QUEUE_TYPE_SDMA_XGMI)
                deallocate_sdma_queue(dqm, q);
        else {
                pr_debug("q->properties.type %d is invalid\n",
                                q->properties.type);
                return -EINVAL;
        }
        dqm->total_queue_count--;

        deallocate_doorbell(qpd, q);

        if (!dqm->sched_running) {
                WARN_ONCE(1, "Destroy non-HWS queue while stopped\n");
                return 0;
        }

        retval = mqd_mgr->destroy_mqd(mqd_mgr, q->mqd,
                                KFD_PREEMPT_TYPE_WAVEFRONT_RESET,
                                KFD_UNMAP_LATENCY_MS,
                                q->pipe, q->queue);
        if (retval == -ETIME)
                qpd->reset_wavefronts = true;

        list_del(&q->list);
        if (list_empty(&qpd->queues_list)) {
                if (qpd->reset_wavefronts) {
                        pr_warn("Resetting wave fronts (nocpsch) on dev %p\n",
                                        dqm->dev);
                        /* dbgdev_wave_reset_wavefronts has to be called before
                         * deallocate_vmid(), i.e. when vmid is still in use.
                         */
                        dbgdev_wave_reset_wavefronts(dqm->dev,
                                        qpd->pqm->process);
                        qpd->reset_wavefronts = false;
                }

                deallocate_vmid(dqm, qpd, q);
        }
        qpd->queue_count--;
        if (q->properties.is_active)
                decrement_queue_count(dqm, qpd, q);

        return retval;
}

static int destroy_queue_nocpsch(struct device_queue_manager *dqm,
                                struct qcm_process_device *qpd,
                                struct queue *q)
{
        int retval;
        uint64_t sdma_val = 0;
        struct device *dev = dqm->dev->adev->dev;
        struct kfd_process_device *pdd = qpd_to_pdd(qpd);
        struct mqd_manager *mqd_mgr =
                dqm->mqd_mgrs[get_mqd_type_from_queue_type(q->properties.type)];

        /* Get the SDMA queue stats */
        if ((q->properties.type == KFD_QUEUE_TYPE_SDMA) ||
            (q->properties.type == KFD_QUEUE_TYPE_SDMA_XGMI)) {
                retval = read_sdma_queue_counter((uint64_t __user *)q->properties.read_ptr,
                                                        &sdma_val);
                if (retval)
                        dev_err(dev, "Failed to read SDMA queue counter for queue: %d\n",
                                q->properties.queue_id);
        }

        dqm_lock(dqm);
        retval = destroy_queue_nocpsch_locked(dqm, qpd, q);
        if (!retval)
                pdd->sdma_past_activity_counter += sdma_val;
        dqm_unlock(dqm);

        mqd_mgr->free_mqd(mqd_mgr, q->mqd, q->mqd_mem_obj);

        return retval;
}

static int update_queue(struct device_queue_manager *dqm, struct queue *q,
                        struct mqd_update_info *minfo)
{
        int retval = 0;
        struct device *dev = dqm->dev->adev->dev;
        struct mqd_manager *mqd_mgr;
        struct kfd_process_device *pdd;
        bool prev_active = false;

        dqm_lock(dqm);
        pdd = kfd_get_process_device_data(q->device, q->process);
        if (!pdd) {
                retval = -ENODEV;
                goto out_unlock;
        }
        mqd_mgr = dqm->mqd_mgrs[get_mqd_type_from_queue_type(
                        q->properties.type)];

        /* Save previous activity state for counters */
        prev_active = q->properties.is_active;

        /* Make sure the queue is unmapped before updating the MQD */
        if (dqm->sched_policy != KFD_SCHED_POLICY_NO_HWS) {
                if (!dqm->dev->kfd->shared_resources.enable_mes)
                        retval = unmap_queues_cpsch(dqm,
                                                    KFD_UNMAP_QUEUES_FILTER_DYNAMIC_QUEUES, 0, USE_DEFAULT_GRACE_PERIOD, false);
                else if (prev_active)
                        retval = remove_queue_mes(dqm, q, &pdd->qpd);

                /* queue is reset so inaccessable  */
                if (pdd->has_reset_queue) {
                        retval = -EACCES;
                        goto out_unlock;
                }

                if (retval) {
                        dev_err(dev, "unmap queue failed\n");
                        goto out_unlock;
                }
        } else if (prev_active &&
                   (q->properties.type == KFD_QUEUE_TYPE_COMPUTE ||
                    q->properties.type == KFD_QUEUE_TYPE_SDMA ||
                    q->properties.type == KFD_QUEUE_TYPE_SDMA_XGMI)) {

                if (!dqm->sched_running) {
                        WARN_ONCE(1, "Update non-HWS queue while stopped\n");
                        goto out_unlock;
                }

                retval = mqd_mgr->destroy_mqd(mqd_mgr, q->mqd,
                                (dqm->dev->kfd->cwsr_enabled ?
                                 KFD_PREEMPT_TYPE_WAVEFRONT_SAVE :
                                 KFD_PREEMPT_TYPE_WAVEFRONT_DRAIN),
                                KFD_UNMAP_LATENCY_MS, q->pipe, q->queue);
                if (retval) {
                        dev_err(dev, "destroy mqd failed\n");
                        goto out_unlock;
                }
        }

        mqd_mgr->update_mqd(mqd_mgr, q->mqd, &q->properties, minfo);

        /*
         * check active state vs. the previous state and modify
         * counter accordingly. map_queues_cpsch uses the
         * dqm->active_queue_count to determine whether a new runlist must be
         * uploaded.
         */
        if (q->properties.is_active && !prev_active) {
                increment_queue_count(dqm, &pdd->qpd, q);
        } else if (!q->properties.is_active && prev_active) {
                decrement_queue_count(dqm, &pdd->qpd, q);
        } else if (q->gws && !q->properties.is_gws) {
                if (q->properties.is_active) {
                        dqm->gws_queue_count++;
                        pdd->qpd.mapped_gws_queue = true;
                }
                q->properties.is_gws = true;
        } else if (!q->gws && q->properties.is_gws) {
                if (q->properties.is_active) {
                        dqm->gws_queue_count--;
                        pdd->qpd.mapped_gws_queue = false;
                }
                q->properties.is_gws = false;
        }

        if (dqm->sched_policy != KFD_SCHED_POLICY_NO_HWS) {
                if (!dqm->dev->kfd->shared_resources.enable_mes)
                        retval = map_queues_cpsch(dqm);
                else if (q->properties.is_active)
                        retval = add_queue_mes(dqm, q, &pdd->qpd);
        } else if (q->properties.is_active &&
                 (q->properties.type == KFD_QUEUE_TYPE_COMPUTE ||
                  q->properties.type == KFD_QUEUE_TYPE_SDMA ||
                  q->properties.type == KFD_QUEUE_TYPE_SDMA_XGMI)) {
                if (WARN(q->process->mm != current->mm,
                         "should only run in user thread"))
                        retval = -EFAULT;
                else
                        retval = mqd_mgr->load_mqd(mqd_mgr, q->mqd,
                                                   q->pipe, q->queue,
                                                   &q->properties, current->mm);
        }

out_unlock:
        dqm_unlock(dqm);
        return retval;
}

/* suspend_single_queue does not lock the dqm like the
 * evict_process_queues_cpsch or evict_process_queues_nocpsch. You should
 * lock the dqm before calling, and unlock after calling.
 *
 * The reason we don't lock the dqm is because this function may be
 * called on multiple queues in a loop, so rather than locking/unlocking
 * multiple times, we will just keep the dqm locked for all of the calls.
 */
static int suspend_single_queue(struct device_queue_manager *dqm,
                                      struct kfd_process_device *pdd,
                                      struct queue *q)
{
        bool is_new;

        if (q->properties.is_suspended)
                return 0;

        pr_debug("Suspending process pid %d queue [%i]\n",
                        pdd->process->lead_thread->pid,
                        q->properties.queue_id);

        is_new = q->properties.exception_status & KFD_EC_MASK(EC_QUEUE_NEW);

        if (is_new || q->properties.is_being_destroyed) {
                pr_debug("Suspend: skip %s queue id %i\n",
                                is_new ? "new" : "destroyed",
                                q->properties.queue_id);
                return -EBUSY;
        }

        q->properties.is_suspended = true;
        if (q->properties.is_active) {
                if (dqm->dev->kfd->shared_resources.enable_mes) {
                        int r = remove_queue_mes(dqm, q, &pdd->qpd);

                        if (r)
                                return r;
                }

                decrement_queue_count(dqm, &pdd->qpd, q);
                q->properties.is_active = false;
        }

        return 0;
}

/* resume_single_queue does not lock the dqm like the functions
 * restore_process_queues_cpsch or restore_process_queues_nocpsch. You should
 * lock the dqm before calling, and unlock after calling.
 *
 * The reason we don't lock the dqm is because this function may be
 * called on multiple queues in a loop, so rather than locking/unlocking
 * multiple times, we will just keep the dqm locked for all of the calls.
 */
static int resume_single_queue(struct device_queue_manager *dqm,
                                      struct qcm_process_device *qpd,
                                      struct queue *q)
{
        struct kfd_process_device *pdd;

        if (!q->properties.is_suspended)
                return 0;

        pdd = qpd_to_pdd(qpd);

        pr_debug("Restoring from suspend process pid %d queue [%i]\n",
                            pdd->process->lead_thread->pid,
                            q->properties.queue_id);

        q->properties.is_suspended = false;

        if (QUEUE_IS_ACTIVE(q->properties)) {
                if (dqm->dev->kfd->shared_resources.enable_mes) {
                        int r = add_queue_mes(dqm, q, &pdd->qpd);

                        if (r)
                                return r;
                }

                q->properties.is_active = true;
                increment_queue_count(dqm, qpd, q);
        }

        return 0;
}

static int evict_process_queues_nocpsch(struct device_queue_manager *dqm,
                                        struct qcm_process_device *qpd)
{
        struct queue *q;
        struct mqd_manager *mqd_mgr;
        struct kfd_process_device *pdd;
        int retval, ret = 0;

        dqm_lock(dqm);
        if (qpd->evicted++ > 0) /* already evicted, do nothing */
                goto out;

        pdd = qpd_to_pdd(qpd);
        pr_debug_ratelimited("Evicting process pid %d queues\n",
                            pdd->process->lead_thread->pid);

        pdd->last_evict_timestamp = get_jiffies_64();
        /* Mark all queues as evicted. Deactivate all active queues on
         * the qpd.
         */
        list_for_each_entry(q, &qpd->queues_list, list) {
                q->properties.is_evicted = true;
                if (!q->properties.is_active)
                        continue;

                mqd_mgr = dqm->mqd_mgrs[get_mqd_type_from_queue_type(
                                q->properties.type)];
                q->properties.is_active = false;
                decrement_queue_count(dqm, qpd, q);

                if (WARN_ONCE(!dqm->sched_running, "Evict when stopped\n"))
                        continue;

                retval = mqd_mgr->destroy_mqd(mqd_mgr, q->mqd,
                                (dqm->dev->kfd->cwsr_enabled ?
                                 KFD_PREEMPT_TYPE_WAVEFRONT_SAVE :
                                 KFD_PREEMPT_TYPE_WAVEFRONT_DRAIN),
                                KFD_UNMAP_LATENCY_MS, q->pipe, q->queue);
                if (retval && !ret)
                        /* Return the first error, but keep going to
                         * maintain a consistent eviction state
                         */
                        ret = retval;
        }

out:
        dqm_unlock(dqm);
        return ret;
}

static int evict_process_queues_cpsch(struct device_queue_manager *dqm,
                                      struct qcm_process_device *qpd)
{
        struct queue *q;
        struct device *dev = dqm->dev->adev->dev;
        struct kfd_process_device *pdd;
        int retval = 0;

        dqm_lock(dqm);
        if (qpd->evicted++ > 0) /* already evicted, do nothing */
                goto out;

        pdd = qpd_to_pdd(qpd);

        /* The debugger creates processes that temporarily have not acquired
         * all VMs for all devices and has no VMs itself.
         * Skip queue eviction on process eviction.
         */
        if (!pdd->drm_priv)
                goto out;

        pr_debug_ratelimited("Evicting process pid %d queues\n",
                            pdd->process->lead_thread->pid);

        if (dqm->dev->kfd->shared_resources.enable_mes)
                pdd->last_evict_timestamp = get_jiffies_64();

        /* Mark all queues as evicted. Deactivate all active queues on
         * the qpd.
         */
        list_for_each_entry(q, &qpd->queues_list, list) {
                q->properties.is_evicted = true;
                if (!q->properties.is_active)
                        continue;

                q->properties.is_active = false;
                decrement_queue_count(dqm, qpd, q);

                if (dqm->dev->kfd->shared_resources.enable_mes) {
                        retval = remove_queue_mes(dqm, q, qpd);
                        if (retval) {
                                dev_err(dev, "Failed to evict queue %d\n",
                                        q->properties.queue_id);
                                goto out;
                        }
                }
        }

        if (!dqm->dev->kfd->shared_resources.enable_mes) {
                pdd->last_evict_timestamp = get_jiffies_64();
                retval = execute_queues_cpsch(dqm,
                                              qpd->is_debug ?
                                              KFD_UNMAP_QUEUES_FILTER_ALL_QUEUES :
                                              KFD_UNMAP_QUEUES_FILTER_DYNAMIC_QUEUES, 0,
                                              USE_DEFAULT_GRACE_PERIOD);
        }

out:
        dqm_unlock(dqm);
        return retval;
}

static int restore_process_queues_nocpsch(struct device_queue_manager *dqm,
                                          struct qcm_process_device *qpd)
{
        struct mm_struct *mm = NULL;
        struct queue *q;
        struct mqd_manager *mqd_mgr;
        struct kfd_process_device *pdd;
        uint64_t pd_base;
        uint64_t eviction_duration;
        int retval, ret = 0;

        pdd = qpd_to_pdd(qpd);
        /* Retrieve PD base */
        pd_base = amdgpu_amdkfd_gpuvm_get_process_page_dir(pdd->drm_priv);

        dqm_lock(dqm);
        if (WARN_ON_ONCE(!qpd->evicted)) /* already restored, do nothing */
                goto out;
        if (qpd->evicted > 1) { /* ref count still > 0, decrement & quit */
                qpd->evicted--;
                goto out;
        }

        pr_debug_ratelimited("Restoring process pid %d queues\n",
                            pdd->process->lead_thread->pid);

        /* Update PD Base in QPD */
        qpd->page_table_base = pd_base;
        pr_debug("Updated PD address to 0x%llx\n", pd_base);

        if (!list_empty(&qpd->queues_list)) {
                dqm->dev->kfd2kgd->set_vm_context_page_table_base(
                                dqm->dev->adev,
                                qpd->vmid,
                                qpd->page_table_base);
                kfd_flush_tlb(pdd, TLB_FLUSH_LEGACY);
        }

        /* Take a safe reference to the mm_struct, which may otherwise
         * disappear even while the kfd_process is still referenced.
         */
        mm = get_task_mm(pdd->process->lead_thread);
        if (!mm) {
                ret = -EFAULT;
                goto out;
        }

        /* Remove the eviction flags. Activate queues that are not
         * inactive for other reasons.
         */
        list_for_each_entry(q, &qpd->queues_list, list) {
                q->properties.is_evicted = false;
                if (!QUEUE_IS_ACTIVE(q->properties))
                        continue;

                mqd_mgr = dqm->mqd_mgrs[get_mqd_type_from_queue_type(
                                q->properties.type)];
                q->properties.is_active = true;
                increment_queue_count(dqm, qpd, q);

                if (WARN_ONCE(!dqm->sched_running, "Restore when stopped\n"))
                        continue;

                retval = mqd_mgr->load_mqd(mqd_mgr, q->mqd, q->pipe,
                                       q->queue, &q->properties, mm);
                if (retval && !ret)
                        /* Return the first error, but keep going to
                         * maintain a consistent eviction state
                         */
                        ret = retval;
        }
        qpd->evicted = 0;
        eviction_duration = get_jiffies_64() - pdd->last_evict_timestamp;
        atomic64_add(eviction_duration, &pdd->evict_duration_counter);
out:
        if (mm)
                mmput(mm);
        dqm_unlock(dqm);
        return ret;
}

static int restore_process_queues_cpsch(struct device_queue_manager *dqm,
                                        struct qcm_process_device *qpd)
{
        struct queue *q;
        struct device *dev = dqm->dev->adev->dev;
        struct kfd_process_device *pdd;
        uint64_t eviction_duration;
        int retval = 0;

        pdd = qpd_to_pdd(qpd);

        dqm_lock(dqm);
        if (WARN_ON_ONCE(!qpd->evicted)) /* already restored, do nothing */
                goto out;
        if (qpd->evicted > 1) { /* ref count still > 0, decrement & quit */
                qpd->evicted--;
                goto out;
        }

        /* The debugger creates processes that temporarily have not acquired
         * all VMs for all devices and has no VMs itself.
         * Skip queue restore on process restore.
         */
        if (!pdd->drm_priv)
                goto vm_not_acquired;

        pr_debug_ratelimited("Restoring process pid %d queues\n",
                            pdd->process->lead_thread->pid);

        /* Update PD Base in QPD */
        qpd->page_table_base = amdgpu_amdkfd_gpuvm_get_process_page_dir(pdd->drm_priv);
        pr_debug("Updated PD address to 0x%llx\n", qpd->page_table_base);

        /* activate all active queues on the qpd */
        list_for_each_entry(q, &qpd->queues_list, list) {
                q->properties.is_evicted = false;
                if (!QUEUE_IS_ACTIVE(q->properties))
                        continue;

                q->properties.is_active = true;
                increment_queue_count(dqm, &pdd->qpd, q);

                if (dqm->dev->kfd->shared_resources.enable_mes) {
                        retval = add_queue_mes(dqm, q, qpd);
                        if (retval) {
                                dev_err(dev, "Failed to restore queue %d\n",
                                        q->properties.queue_id);
                                goto out;
                        }
                }
        }
        if (!dqm->dev->kfd->shared_resources.enable_mes)
                retval = execute_queues_cpsch(dqm,
                                              KFD_UNMAP_QUEUES_FILTER_DYNAMIC_QUEUES, 0, USE_DEFAULT_GRACE_PERIOD);
        eviction_duration = get_jiffies_64() - pdd->last_evict_timestamp;
        atomic64_add(eviction_duration, &pdd->evict_duration_counter);
vm_not_acquired:
        qpd->evicted = 0;
out:
        dqm_unlock(dqm);
        return retval;
}

static int register_process(struct device_queue_manager *dqm,
                                        struct qcm_process_device *qpd)
{
        struct device_process_node *n;
        struct kfd_process_device *pdd;
        uint64_t pd_base;
        int retval;

        n = kzalloc_obj(*n);
        if (!n)
                return -ENOMEM;

        n->qpd = qpd;

        pdd = qpd_to_pdd(qpd);
        /* Retrieve PD base */
        pd_base = amdgpu_amdkfd_gpuvm_get_process_page_dir(pdd->drm_priv);

        dqm_lock(dqm);
        list_add(&n->list, &dqm->queues);

        /* Update PD Base in QPD */
        qpd->page_table_base = pd_base;
        pr_debug("Updated PD address to 0x%llx\n", pd_base);

        retval = dqm->asic_ops.update_qpd(dqm, qpd);

        dqm->processes_count++;

        dqm_unlock(dqm);

        /* Outside the DQM lock because under the DQM lock we can't do
         * reclaim or take other locks that others hold while reclaiming.
         */
        kfd_inc_compute_active(dqm->dev);

        return retval;
}

static int unregister_process(struct device_queue_manager *dqm,
                                        struct qcm_process_device *qpd)
{
        int retval = 0;
        struct device_process_node *cur, *next;

        pr_debug("qpd->queues_list is %s\n",
                        list_empty(&qpd->queues_list) ? "empty" : "not empty");

        dqm_lock(dqm);

        list_for_each_entry_safe(cur, next, &dqm->queues, list) {
                if (qpd == cur->qpd) {
                        list_del(&cur->list);
                        kfree(cur);
                        dqm->processes_count--;
                        goto out;
                }
        }
        /* qpd not found in dqm list */
        retval = 1;
out:
        dqm_unlock(dqm);

        /* Outside the DQM lock because under the DQM lock we can't do
         * reclaim or take other locks that others hold while reclaiming.
         */
        if (!retval)
                kfd_dec_compute_active(dqm->dev);

        return retval;
}

static int
set_pasid_vmid_mapping(struct device_queue_manager *dqm, u32 pasid,
                        unsigned int vmid)
{
        uint32_t xcc_mask = dqm->dev->xcc_mask;
        int xcc_id, ret = 0;

        for_each_inst(xcc_id, xcc_mask) {
                ret = dqm->dev->kfd2kgd->set_pasid_vmid_mapping(
                        dqm->dev->adev, pasid, vmid, xcc_id);
                if (ret)
                        break;
        }

        return ret;
}

static void init_interrupts(struct device_queue_manager *dqm)
{
        uint32_t xcc_mask = dqm->dev->xcc_mask;
        unsigned int i, xcc_id;

        for_each_inst(xcc_id, xcc_mask) {
                for (i = 0 ; i < get_pipes_per_mec(dqm) ; i++) {
                        if (is_pipe_enabled(dqm, 0, i)) {
                                dqm->dev->kfd2kgd->init_interrupts(
                                        dqm->dev->adev, i, xcc_id);
                        }
                }
        }
}

static int initialize_nocpsch(struct device_queue_manager *dqm)
{
        int pipe, queue;

        pr_debug("num of pipes: %d\n", get_pipes_per_mec(dqm));

        dqm->allocated_queues = kcalloc(get_pipes_per_mec(dqm),
                                        sizeof(unsigned int), GFP_KERNEL);
        if (!dqm->allocated_queues)
                return -ENOMEM;

        mutex_init(&dqm->lock_hidden);
        INIT_LIST_HEAD(&dqm->queues);
        dqm->active_queue_count = dqm->next_pipe_to_allocate = 0;
        dqm->active_cp_queue_count = 0;
        dqm->gws_queue_count = 0;

        for (pipe = 0; pipe < get_pipes_per_mec(dqm); pipe++) {
                int pipe_offset = pipe * get_queues_per_pipe(dqm);

                for (queue = 0; queue < get_queues_per_pipe(dqm); queue++)
                        if (test_bit(pipe_offset + queue,
                                     dqm->dev->kfd->shared_resources.cp_queue_bitmap))
                                dqm->allocated_queues[pipe] |= 1 << queue;
        }

        memset(dqm->vmid_pasid, 0, sizeof(dqm->vmid_pasid));

        init_sdma_bitmaps(dqm);

        return 0;
}

static void uninitialize(struct device_queue_manager *dqm)
{
        int i;

        WARN_ON(dqm->active_queue_count > 0 || dqm->processes_count > 0);

        kfree(dqm->allocated_queues);
        for (i = 0 ; i < KFD_MQD_TYPE_MAX ; i++)
                kfree(dqm->mqd_mgrs[i]);
        mutex_destroy(&dqm->lock_hidden);
}

static int start_nocpsch(struct device_queue_manager *dqm)
{
        int r = 0;

        pr_info("SW scheduler is used");
        init_interrupts(dqm);

        if (dqm->dev->adev->asic_type == CHIP_HAWAII)
                r = pm_init(&dqm->packet_mgr, dqm);
        if (!r)
                dqm->sched_running = true;

        return r;
}

static int stop_nocpsch(struct device_queue_manager *dqm)
{
        dqm_lock(dqm);
        if (!dqm->sched_running) {
                dqm_unlock(dqm);
                return 0;
        }

        if (dqm->dev->adev->asic_type == CHIP_HAWAII)
                pm_uninit(&dqm->packet_mgr);
        dqm->sched_running = false;
        dqm_unlock(dqm);

        return 0;
}

static int allocate_sdma_queue(struct device_queue_manager *dqm,
                                struct queue *q, const uint32_t *restore_sdma_id)
{
        struct device *dev = dqm->dev->adev->dev;
        int bit;

        if (q->properties.type == KFD_QUEUE_TYPE_SDMA) {
                if (bitmap_empty(dqm->sdma_bitmap, get_num_sdma_queues(dqm))) {
                        dev_warn(dev, "No more SDMA queue to allocate (%d total queues)\n",
                                 get_num_sdma_queues(dqm));
                        return -ENOMEM;
                }

                if (restore_sdma_id) {
                        /* Re-use existing sdma_id */
                        if (!test_bit(*restore_sdma_id, dqm->sdma_bitmap)) {
                                dev_err(dev, "SDMA queue already in use\n");
                                return -EBUSY;
                        }
                        clear_bit(*restore_sdma_id, dqm->sdma_bitmap);
                        q->sdma_id = *restore_sdma_id;
                } else {
                        /* Find first available sdma_id */
                        bit = find_first_bit(dqm->sdma_bitmap,
                                             get_num_sdma_queues(dqm));
                        clear_bit(bit, dqm->sdma_bitmap);
                        q->sdma_id = bit;
                }

                q->properties.sdma_engine_id =
                        q->sdma_id % kfd_get_num_sdma_engines(dqm->dev);
                q->properties.sdma_queue_id = q->sdma_id /
                                kfd_get_num_sdma_engines(dqm->dev);
        } else if (q->properties.type == KFD_QUEUE_TYPE_SDMA_XGMI) {
                if (bitmap_empty(dqm->xgmi_sdma_bitmap, get_num_xgmi_sdma_queues(dqm))) {
                        dev_warn(dev, "No more XGMI SDMA queue to allocate (%d total queues)\n",
                                 get_num_xgmi_sdma_queues(dqm));
                        return -ENOMEM;
                }
                if (restore_sdma_id) {
                        /* Re-use existing sdma_id */
                        if (!test_bit(*restore_sdma_id, dqm->xgmi_sdma_bitmap)) {
                                dev_err(dev, "SDMA queue already in use\n");
                                return -EBUSY;
                        }
                        clear_bit(*restore_sdma_id, dqm->xgmi_sdma_bitmap);
                        q->sdma_id = *restore_sdma_id;
                } else {
                        bit = find_first_bit(dqm->xgmi_sdma_bitmap,
                                             get_num_xgmi_sdma_queues(dqm));
                        clear_bit(bit, dqm->xgmi_sdma_bitmap);
                        q->sdma_id = bit;
                }
                /* sdma_engine_id is sdma id including
                 * both PCIe-optimized SDMAs and XGMI-
                 * optimized SDMAs. The calculation below
                 * assumes the first N engines are always
                 * PCIe-optimized ones
                 */
                q->properties.sdma_engine_id =
                        kfd_get_num_sdma_engines(dqm->dev) +
                        q->sdma_id % kfd_get_num_xgmi_sdma_engines(dqm->dev);
                q->properties.sdma_queue_id = q->sdma_id /
                        kfd_get_num_xgmi_sdma_engines(dqm->dev);
        } else if (q->properties.type == KFD_QUEUE_TYPE_SDMA_BY_ENG_ID) {
                int i, num_queues, num_engines, eng_offset = 0, start_engine;
                bool free_bit_found = false, is_xgmi = false;

                if (q->properties.sdma_engine_id < kfd_get_num_sdma_engines(dqm->dev)) {
                        num_queues = get_num_sdma_queues(dqm);
                        num_engines = kfd_get_num_sdma_engines(dqm->dev);
                        q->properties.type = KFD_QUEUE_TYPE_SDMA;
                } else {
                        num_queues = get_num_xgmi_sdma_queues(dqm);
                        num_engines = kfd_get_num_xgmi_sdma_engines(dqm->dev);
                        eng_offset = kfd_get_num_sdma_engines(dqm->dev);
                        q->properties.type = KFD_QUEUE_TYPE_SDMA_XGMI;
                        is_xgmi = true;
                }

                /* Scan available bit based on target engine ID. */
                start_engine = q->properties.sdma_engine_id - eng_offset;
                for (i = start_engine; i < num_queues; i += num_engines) {

                        if (!test_bit(i, is_xgmi ? dqm->xgmi_sdma_bitmap : dqm->sdma_bitmap))
                                continue;

                        clear_bit(i, is_xgmi ? dqm->xgmi_sdma_bitmap : dqm->sdma_bitmap);
                        q->sdma_id = i;
                        q->properties.sdma_queue_id = q->sdma_id / num_engines;
                        free_bit_found = true;
                        break;
                }

                if (!free_bit_found) {
                        dev_warn(dev, "No more SDMA queue to allocate for target ID %i (%d total queues)\n",
                                 q->properties.sdma_engine_id, num_queues);
                        return -ENOMEM;
                }
        }

        pr_debug("SDMA engine id: %d\n", q->properties.sdma_engine_id);
        pr_debug("SDMA queue id: %d\n", q->properties.sdma_queue_id);

        return 0;
}

static void deallocate_sdma_queue(struct device_queue_manager *dqm,
                                struct queue *q)
{
        if (q->properties.type == KFD_QUEUE_TYPE_SDMA) {
                if (q->sdma_id >= get_num_sdma_queues(dqm))
                        return;
                set_bit(q->sdma_id, dqm->sdma_bitmap);
        } else if (q->properties.type == KFD_QUEUE_TYPE_SDMA_XGMI) {
                if (q->sdma_id >= get_num_xgmi_sdma_queues(dqm))
                        return;
                set_bit(q->sdma_id, dqm->xgmi_sdma_bitmap);
        }
}

/*
 * Device Queue Manager implementation for cp scheduler
 */

static int set_sched_resources(struct device_queue_manager *dqm)
{
        int i, mec;
        struct scheduling_resources res;
        struct device *dev = dqm->dev->adev->dev;

        res.vmid_mask = dqm->dev->compute_vmid_bitmap;

        res.queue_mask = 0;
        for (i = 0; i < AMDGPU_MAX_QUEUES; ++i) {
                mec = (i / dqm->dev->kfd->shared_resources.num_queue_per_pipe)
                        / dqm->dev->kfd->shared_resources.num_pipe_per_mec;

                if (!test_bit(i, dqm->dev->kfd->shared_resources.cp_queue_bitmap))
                        continue;

                /* only acquire queues from the first MEC */
                if (mec > 0)
                        continue;

                /* This situation may be hit in the future if a new HW
                 * generation exposes more than 64 queues. If so, the
                 * definition of res.queue_mask needs updating
                 */
                if (WARN_ON(i >= (sizeof(res.queue_mask)*8))) {
                        dev_err(dev, "Invalid queue enabled by amdgpu: %d\n", i);
                        break;
                }

                res.queue_mask |= 1ull
                        << amdgpu_queue_mask_bit_to_set_resource_bit(
                                dqm->dev->adev, i);
        }
        res.gws_mask = ~0ull;
        res.oac_mask = res.gds_heap_base = res.gds_heap_size = 0;

        pr_debug("Scheduling resources:\n"
                        "vmid mask: 0x%8X\n"
                        "queue mask: 0x%8llX\n",
                        res.vmid_mask, res.queue_mask);

        return pm_send_set_resources(&dqm->packet_mgr, &res);
}

static int initialize_cpsch(struct device_queue_manager *dqm)
{
        pr_debug("num of pipes: %d\n", get_pipes_per_mec(dqm));

        mutex_init(&dqm->lock_hidden);
        INIT_LIST_HEAD(&dqm->queues);
        dqm->active_queue_count = dqm->processes_count = 0;
        dqm->active_cp_queue_count = 0;
        dqm->gws_queue_count = 0;
        dqm->active_runlist = false;
        dqm->trap_debug_vmid = 0;

        init_sdma_bitmaps(dqm);

        update_dqm_wait_times(dqm);
        return 0;
}

/* halt_cpsch:
 * Unmap queues so the schedule doesn't continue remaining jobs in the queue.
 * Then set dqm->sched_halt so queues don't map to runlist until unhalt_cpsch
 * is called.
 */
static int halt_cpsch(struct device_queue_manager *dqm)
{
        int ret = 0;

        dqm_lock(dqm);
        if (!dqm->sched_running) {
                dqm_unlock(dqm);
                return 0;
        }

        WARN_ONCE(dqm->sched_halt, "Scheduling is already on halt\n");

        if (!dqm->is_hws_hang) {
                if (!dqm->dev->kfd->shared_resources.enable_mes)
                        ret = unmap_queues_cpsch(dqm,
                                                 KFD_UNMAP_QUEUES_FILTER_ALL_QUEUES, 0,
                                USE_DEFAULT_GRACE_PERIOD, false);
                else
                        ret = remove_all_kfd_queues_mes(dqm);
        }
        dqm->sched_halt = true;
        dqm_unlock(dqm);

        return ret;
}

/* unhalt_cpsch
 * Unset dqm->sched_halt and map queues back to runlist
 */
static int unhalt_cpsch(struct device_queue_manager *dqm)
{
        int ret = 0;

        dqm_lock(dqm);
        if (!dqm->sched_running || !dqm->sched_halt) {
                WARN_ONCE(!dqm->sched_halt, "Scheduling is not on halt.\n");
                dqm_unlock(dqm);
                return 0;
        }
        dqm->sched_halt = false;
        if (!dqm->dev->kfd->shared_resources.enable_mes)
                ret = execute_queues_cpsch(dqm,
                                           KFD_UNMAP_QUEUES_FILTER_DYNAMIC_QUEUES,
                        0, USE_DEFAULT_GRACE_PERIOD);
        else
                ret = add_all_kfd_queues_mes(dqm);

        dqm_unlock(dqm);

        return ret;
}

static int start_cpsch(struct device_queue_manager *dqm)
{
        struct device *dev = dqm->dev->adev->dev;
        int retval, num_hw_queue_slots;

        dqm_lock(dqm);

        if (!dqm->dev->kfd->shared_resources.enable_mes) {
                retval = pm_init(&dqm->packet_mgr, dqm);
                if (retval)
                        goto fail_packet_manager_init;

                retval = set_sched_resources(dqm);
                if (retval)
                        goto fail_set_sched_resources;
        }
        pr_debug("Allocating fence memory\n");

        /* allocate fence memory on the gart */
        retval = kfd_gtt_sa_allocate(dqm->dev, sizeof(*dqm->fence_addr),
                                        &dqm->fence_mem);

        if (retval)
                goto fail_allocate_vidmem;

        dqm->fence_addr = (uint64_t *)dqm->fence_mem->cpu_ptr;
        dqm->fence_gpu_addr = dqm->fence_mem->gpu_addr;

        init_interrupts(dqm);

        /* clear hang status when driver try to start the hw scheduler */
        dqm->sched_running = true;

        if (!dqm->dev->kfd->shared_resources.enable_mes) {
                if (pm_config_dequeue_wait_counts(&dqm->packet_mgr,
                                KFD_DEQUEUE_WAIT_INIT, 0 /* unused */))
                        dev_err(dev, "Setting optimized dequeue wait failed. Using default values\n");
                execute_queues_cpsch(dqm, KFD_UNMAP_QUEUES_FILTER_DYNAMIC_QUEUES, 0, USE_DEFAULT_GRACE_PERIOD);
        }

        /* setup per-queue reset detection buffer  */
        num_hw_queue_slots =  dqm->dev->kfd->shared_resources.num_queue_per_pipe *
                              dqm->dev->kfd->shared_resources.num_pipe_per_mec *
                              NUM_XCC(dqm->dev->xcc_mask);

        dqm->detect_hang_info_size = num_hw_queue_slots * sizeof(struct dqm_detect_hang_info);
        dqm->detect_hang_info = kzalloc(dqm->detect_hang_info_size, GFP_KERNEL);

        if (!dqm->detect_hang_info) {
                retval = -ENOMEM;
                goto fail_detect_hang_buffer;
        }

        dqm_unlock(dqm);

        return 0;
fail_detect_hang_buffer:
        kfd_gtt_sa_free(dqm->dev, dqm->fence_mem);
fail_allocate_vidmem:
fail_set_sched_resources:
        if (!dqm->dev->kfd->shared_resources.enable_mes)
                pm_uninit(&dqm->packet_mgr);
fail_packet_manager_init:
        dqm_unlock(dqm);
        return retval;
}

static int stop_cpsch(struct device_queue_manager *dqm)
{
        int ret = 0;

        dqm_lock(dqm);
        if (!dqm->sched_running) {
                dqm_unlock(dqm);
                return 0;
        }

        if (!dqm->dev->kfd->shared_resources.enable_mes)
                ret = unmap_queues_cpsch(dqm, KFD_UNMAP_QUEUES_FILTER_ALL_QUEUES,
                                                                0, USE_DEFAULT_GRACE_PERIOD, false);
        else
                ret = remove_all_kfd_queues_mes(dqm);

        dqm->sched_running = false;

        if (!dqm->dev->kfd->shared_resources.enable_mes)
                pm_release_ib(&dqm->packet_mgr);

        kfd_gtt_sa_free(dqm->dev, dqm->fence_mem);
        if (!dqm->dev->kfd->shared_resources.enable_mes)
                pm_uninit(&dqm->packet_mgr);
        kfree(dqm->detect_hang_info);
        dqm->detect_hang_info = NULL;
        dqm_unlock(dqm);

        return ret;
}

static int create_kernel_queue_cpsch(struct device_queue_manager *dqm,
                                        struct kernel_queue *kq,
                                        struct qcm_process_device *qpd)
{
        dqm_lock(dqm);
        if (dqm->total_queue_count >= max_num_of_queues_per_device) {
                pr_warn("Can't create new kernel queue because %d queues were already created\n",
                                dqm->total_queue_count);
                dqm_unlock(dqm);
                return -EPERM;
        }

        /*
         * Unconditionally increment this counter, regardless of the queue's
         * type or whether the queue is active.
         */
        dqm->total_queue_count++;
        pr_debug("Total of %d queues are accountable so far\n",
                        dqm->total_queue_count);

        list_add(&kq->list, &qpd->priv_queue_list);
        increment_queue_count(dqm, qpd, kq->queue);
        qpd->is_debug = true;
        execute_queues_cpsch(dqm, KFD_UNMAP_QUEUES_FILTER_DYNAMIC_QUEUES, 0,
                        USE_DEFAULT_GRACE_PERIOD);
        dqm_unlock(dqm);

        return 0;
}

static void destroy_kernel_queue_cpsch(struct device_queue_manager *dqm,
                                        struct kernel_queue *kq,
                                        struct qcm_process_device *qpd)
{
        dqm_lock(dqm);
        list_del(&kq->list);
        decrement_queue_count(dqm, qpd, kq->queue);
        qpd->is_debug = false;
        execute_queues_cpsch(dqm, KFD_UNMAP_QUEUES_FILTER_ALL_QUEUES, 0,
                        USE_DEFAULT_GRACE_PERIOD);
        /*
         * Unconditionally decrement this counter, regardless of the queue's
         * type.
         */
        dqm->total_queue_count--;
        pr_debug("Total of %d queues are accountable so far\n",
                        dqm->total_queue_count);
        dqm_unlock(dqm);
}

static int create_queue_cpsch(struct device_queue_manager *dqm, struct queue *q,
                        struct qcm_process_device *qpd,
                        const struct kfd_criu_queue_priv_data *qd,
                        const void *restore_mqd, const void *restore_ctl_stack)
{
        int retval;
        struct mqd_manager *mqd_mgr;

        if (dqm->total_queue_count >= max_num_of_queues_per_device) {
                pr_warn("Can't create new usermode queue because %d queues were already created\n",
                                dqm->total_queue_count);
                retval = -EPERM;
                goto out;
        }

        if (q->properties.type == KFD_QUEUE_TYPE_SDMA ||
                q->properties.type == KFD_QUEUE_TYPE_SDMA_XGMI ||
                q->properties.type == KFD_QUEUE_TYPE_SDMA_BY_ENG_ID) {
                dqm_lock(dqm);
                retval = allocate_sdma_queue(dqm, q, qd ? &qd->sdma_id : NULL);
                dqm_unlock(dqm);
                if (retval)
                        goto out;
        }

        retval = allocate_doorbell(qpd, q, qd ? &qd->doorbell_id : NULL);
        if (retval)
                goto out_deallocate_sdma_queue;

        mqd_mgr = dqm->mqd_mgrs[get_mqd_type_from_queue_type(
                        q->properties.type)];

        if (q->properties.type == KFD_QUEUE_TYPE_SDMA ||
                q->properties.type == KFD_QUEUE_TYPE_SDMA_XGMI)
                dqm->asic_ops.init_sdma_vm(dqm, q, qpd);
        q->properties.tba_addr = qpd->tba_addr;
        q->properties.tma_addr = qpd->tma_addr;
        q->mqd_mem_obj = mqd_mgr->allocate_mqd(mqd_mgr, &q->properties);
        if (!q->mqd_mem_obj) {
                retval = -ENOMEM;
                goto out_deallocate_doorbell;
        }

        dqm_lock(dqm);
        /*
         * Eviction state logic: mark all queues as evicted, even ones
         * not currently active. Restoring inactive queues later only
         * updates the is_evicted flag but is a no-op otherwise.
         */
        q->properties.is_evicted = !!qpd->evicted;
        q->properties.is_dbg_wa = qpd->pqm->process->debug_trap_enabled &&
                                  kfd_dbg_has_cwsr_workaround(q->device);

        if (qd)
                mqd_mgr->restore_mqd(mqd_mgr, &q->mqd, q->mqd_mem_obj, &q->gart_mqd_addr,
                                     &q->properties, restore_mqd, restore_ctl_stack,
                                     qd->ctl_stack_size);
        else
                mqd_mgr->init_mqd(mqd_mgr, &q->mqd, q->mqd_mem_obj,
                                        &q->gart_mqd_addr, &q->properties);

        list_add(&q->list, &qpd->queues_list);
        qpd->queue_count++;

        if (q->properties.is_active) {
                increment_queue_count(dqm, qpd, q);

                if (!dqm->dev->kfd->shared_resources.enable_mes)
                        retval = execute_queues_cpsch(dqm,
                                        KFD_UNMAP_QUEUES_FILTER_DYNAMIC_QUEUES, 0, USE_DEFAULT_GRACE_PERIOD);
                else
                        retval = add_queue_mes(dqm, q, qpd);
                if (retval)
                        goto cleanup_queue;
        }

        /*
         * Unconditionally increment this counter, regardless of the queue's
         * type or whether the queue is active.
         */
        dqm->total_queue_count++;

        pr_debug("Total of %d queues are accountable so far\n",
                        dqm->total_queue_count);

        dqm_unlock(dqm);
        return retval;

cleanup_queue:
        qpd->queue_count--;
        list_del(&q->list);
        if (q->properties.is_active)
                decrement_queue_count(dqm, qpd, q);
        mqd_mgr->free_mqd(mqd_mgr, q->mqd, q->mqd_mem_obj);
        dqm_unlock(dqm);
out_deallocate_doorbell:
        deallocate_doorbell(qpd, q);
out_deallocate_sdma_queue:
        if (q->properties.type == KFD_QUEUE_TYPE_SDMA ||
                q->properties.type == KFD_QUEUE_TYPE_SDMA_XGMI) {
                dqm_lock(dqm);
                deallocate_sdma_queue(dqm, q);
                dqm_unlock(dqm);
        }
out:
        return retval;
}

int amdkfd_fence_wait_timeout(struct device_queue_manager *dqm,
                              uint64_t fence_value,
                              unsigned int timeout_ms)
{
        unsigned long end_jiffies = msecs_to_jiffies(timeout_ms) + jiffies;
        struct device *dev = dqm->dev->adev->dev;
        uint64_t *fence_addr = dqm->fence_addr;

        while (*fence_addr != fence_value) {
                /* Fatal err detected, this response won't come */
                if (amdgpu_amdkfd_is_fed(dqm->dev->adev) ||
                    amdgpu_in_reset(dqm->dev->adev))
                        return -EIO;

                if (time_after(jiffies, end_jiffies)) {
                        dev_err(dev, "qcm fence wait loop timeout expired\n");
                        /* In HWS case, this is used to halt the driver thread
                         * in order not to mess up CP states before doing
                         * scandumps for FW debugging.
                         */
                        while (halt_if_hws_hang)
                                schedule();

                        return -ETIME;
                }
                schedule();
        }

        return 0;
}

/* dqm->lock mutex has to be locked before calling this function */
static int map_queues_cpsch(struct device_queue_manager *dqm)
{
        struct device *dev = dqm->dev->adev->dev;
        int retval;

        if (!dqm->sched_running || dqm->sched_halt)
                return 0;
        if (dqm->active_queue_count <= 0 || dqm->processes_count <= 0)
                return 0;
        if (dqm->active_runlist)
                return 0;

        retval = pm_send_runlist(&dqm->packet_mgr, &dqm->queues);
        pr_debug("%s sent runlist\n", __func__);
        if (retval) {
                dev_err(dev, "failed to execute runlist\n");
                return retval;
        }
        dqm->active_runlist = true;

        return retval;
}

static void set_queue_as_reset(struct device_queue_manager *dqm, struct queue *q,
                               struct qcm_process_device *qpd)
{
        struct kfd_process_device *pdd = qpd_to_pdd(qpd);

        dev_err(dqm->dev->adev->dev, "queue id 0x%0x at pasid %d is reset\n",
                q->properties.queue_id, pdd->process->lead_thread->pid);

        pdd->has_reset_queue = true;
        if (q->properties.is_active) {
                q->properties.is_active = false;
                decrement_queue_count(dqm, qpd, q);
        }
}

static int detect_queue_hang(struct device_queue_manager *dqm)
{
        int i;

        /* detect should be used only in dqm locked queue reset */
        if (WARN_ON(dqm->detect_hang_count > 0))
                return 0;

        memset(dqm->detect_hang_info, 0, dqm->detect_hang_info_size);

        for (i = 0; i < AMDGPU_MAX_QUEUES; ++i) {
                uint32_t mec, pipe, queue;
                int xcc_id;

                mec = (i / dqm->dev->kfd->shared_resources.num_queue_per_pipe)
                        / dqm->dev->kfd->shared_resources.num_pipe_per_mec;

                if (mec || !test_bit(i, dqm->dev->kfd->shared_resources.cp_queue_bitmap))
                        continue;

                amdgpu_queue_mask_bit_to_mec_queue(dqm->dev->adev, i, &mec, &pipe, &queue);

                for_each_inst(xcc_id, dqm->dev->xcc_mask) {
                        uint64_t queue_addr = dqm->dev->kfd2kgd->hqd_get_pq_addr(
                                                dqm->dev->adev, pipe, queue, xcc_id);
                        struct dqm_detect_hang_info hang_info;

                        if (!queue_addr)
                                continue;

                        hang_info.pipe_id = pipe;
                        hang_info.queue_id = queue;
                        hang_info.xcc_id = xcc_id;
                        hang_info.queue_address = queue_addr;

                        dqm->detect_hang_info[dqm->detect_hang_count] = hang_info;
                        dqm->detect_hang_count++;
                }
        }

        return dqm->detect_hang_count;
}

static struct queue *find_queue_by_address(struct device_queue_manager *dqm, uint64_t queue_address)
{
        struct device_process_node *cur;
        struct qcm_process_device *qpd;
        struct queue *q;

        list_for_each_entry(cur, &dqm->queues, list) {
                qpd = cur->qpd;
                list_for_each_entry(q, &qpd->queues_list, list) {
                        if (queue_address == q->properties.queue_address)
                                return q;
                }
        }

        return NULL;
}

static int reset_hung_queues(struct device_queue_manager *dqm)
{
        int r = 0, reset_count = 0, i;

        if (!dqm->detect_hang_info || dqm->is_hws_hang)
                return -EIO;

        /* assume dqm locked. */
        if (!detect_queue_hang(dqm))
                return -ENOTRECOVERABLE;

        for (i = 0; i < dqm->detect_hang_count; i++) {
                struct dqm_detect_hang_info hang_info = dqm->detect_hang_info[i];
                struct queue *q = find_queue_by_address(dqm, hang_info.queue_address);
                struct kfd_process_device *pdd;
                uint64_t queue_addr = 0;

                if (!q) {
                        r = -ENOTRECOVERABLE;
                        goto reset_fail;
                }

                pdd = kfd_get_process_device_data(dqm->dev, q->process);
                if (!pdd) {
                        r = -ENOTRECOVERABLE;
                        goto reset_fail;
                }

                queue_addr = dqm->dev->kfd2kgd->hqd_reset(dqm->dev->adev,
                                hang_info.pipe_id, hang_info.queue_id, hang_info.xcc_id,
                                KFD_UNMAP_LATENCY_MS);

                /* either reset failed or we reset an unexpected queue. */
                if (queue_addr != q->properties.queue_address) {
                        r = -ENOTRECOVERABLE;
                        goto reset_fail;
                }

                set_queue_as_reset(dqm, q, &pdd->qpd);
                reset_count++;
        }

        if (reset_count == dqm->detect_hang_count)
                kfd_signal_reset_event(dqm->dev);
        else
                r = -ENOTRECOVERABLE;

reset_fail:
        dqm->detect_hang_count = 0;

        return r;
}

static bool sdma_has_hang(struct device_queue_manager *dqm)
{
        int engine_start = dqm->dev->node_id * get_num_all_sdma_engines(dqm);
        int engine_end = engine_start + get_num_all_sdma_engines(dqm);
        int num_queues_per_eng =  dqm->dev->kfd->device_info.num_sdma_queues_per_engine;
        int i, j;

        for (i = engine_start; i < engine_end; i++) {
                for (j = 0; j < num_queues_per_eng; j++) {
                        if (!dqm->dev->kfd2kgd->hqd_sdma_get_doorbell(dqm->dev->adev, i, j))
                                continue;

                        return true;
                }
        }

        return false;
}

static bool set_sdma_queue_as_reset(struct device_queue_manager *dqm,
                                    uint32_t doorbell_off)
{
        struct device_process_node *cur;
        struct qcm_process_device *qpd;
        struct queue *q;

        list_for_each_entry(cur, &dqm->queues, list) {
                qpd = cur->qpd;
                list_for_each_entry(q, &qpd->queues_list, list) {
                        if ((q->properties.type == KFD_QUEUE_TYPE_SDMA ||
                             q->properties.type == KFD_QUEUE_TYPE_SDMA_XGMI) &&
                             q->properties.doorbell_off == doorbell_off) {
                                set_queue_as_reset(dqm, q, qpd);
                                return true;
                        }
                }
        }

        return false;
}

static int reset_hung_queues_sdma(struct device_queue_manager *dqm)
{
        int engine_start = dqm->dev->node_id * get_num_all_sdma_engines(dqm);
        int engine_end = engine_start + get_num_all_sdma_engines(dqm);
        int num_queues_per_eng =  dqm->dev->kfd->device_info.num_sdma_queues_per_engine;
        int r = 0, i, j;

        if (dqm->is_hws_hang)
                return -EIO;

        /* Scan for hung HW queues and reset engine. */
        dqm->detect_hang_count = 0;
        for (i = engine_start; i < engine_end; i++) {
                for (j = 0; j < num_queues_per_eng; j++) {
                        uint32_t doorbell_off =
                                dqm->dev->kfd2kgd->hqd_sdma_get_doorbell(dqm->dev->adev, i, j);

                        if (!doorbell_off)
                                continue;

                        /* Reset engine and check. */
                        if (amdgpu_sdma_reset_engine(dqm->dev->adev, i, false) ||
                            dqm->dev->kfd2kgd->hqd_sdma_get_doorbell(dqm->dev->adev, i, j) ||
                            !set_sdma_queue_as_reset(dqm, doorbell_off)) {
                                r = -ENOTRECOVERABLE;
                                goto reset_fail;
                        }

                        /* Should only expect one queue active per engine */
                        dqm->detect_hang_count++;
                        break;
                }
        }

        /* Signal process reset */
        if (dqm->detect_hang_count)
                kfd_signal_reset_event(dqm->dev);
        else
                r = -ENOTRECOVERABLE;

reset_fail:
        dqm->detect_hang_count = 0;

        return r;
}

static int reset_queues_on_hws_hang(struct device_queue_manager *dqm, bool is_sdma)
{
        struct amdgpu_device *adev = dqm->dev->adev;

        while (halt_if_hws_hang)
                schedule();

        if (adev->debug_disable_gpu_ring_reset) {
                dev_info_once(adev->dev,
                              "%s queue hung, but ring reset disabled",
                              is_sdma ? "sdma" : "compute");

                return -EPERM;
        }
        if (!amdgpu_gpu_recovery)
                return -ENOTRECOVERABLE;

        return is_sdma ? reset_hung_queues_sdma(dqm) : reset_hung_queues(dqm);
}

/* dqm->lock mutex has to be locked before calling this function
 *
 * @grace_period: If USE_DEFAULT_GRACE_PERIOD then default wait time
 *   for context switch latency. Lower values are used by debugger
 *   since context switching are triggered at high frequency.
 *   This is configured by setting CP_IQ_WAIT_TIME2.SCH_WAVE
 *
 */
static int unmap_queues_cpsch(struct device_queue_manager *dqm,
                                enum kfd_unmap_queues_filter filter,
                                uint32_t filter_param,
                                uint32_t grace_period,
                                bool reset)
{
        struct device *dev = dqm->dev->adev->dev;
        struct mqd_manager *mqd_mgr;
        int retval;

        if (!dqm->sched_running)
                return 0;
        if (!dqm->active_runlist)
                return 0;
        if (!down_read_trylock(&dqm->dev->adev->reset_domain->sem))
                return -EIO;

        if (grace_period != USE_DEFAULT_GRACE_PERIOD) {
                retval = pm_config_dequeue_wait_counts(&dqm->packet_mgr,
                                KFD_DEQUEUE_WAIT_SET_SCH_WAVE, grace_period);
                if (retval)
                        goto out;
        }

        retval = pm_send_unmap_queue(&dqm->packet_mgr, filter, filter_param, reset);
        if (retval)
                goto out;

        *dqm->fence_addr = KFD_FENCE_INIT;
        mb();
        pm_send_query_status(&dqm->packet_mgr, dqm->fence_gpu_addr,
                                KFD_FENCE_COMPLETED);
        /* should be timed out */
        retval = amdkfd_fence_wait_timeout(dqm, KFD_FENCE_COMPLETED,
                                           queue_preemption_timeout_ms);
        if (retval) {
                dev_err(dev, "The cp might be in an unrecoverable state due to an unsuccessful queues preemption\n");
                kfd_hws_hang(dqm);
                goto out;
        }

        /* In the current MEC firmware implementation, if compute queue
         * doesn't response to the preemption request in time, HIQ will
         * abandon the unmap request without returning any timeout error
         * to driver. Instead, MEC firmware will log the doorbell of the
         * unresponding compute queue to HIQ.MQD.queue_doorbell_id fields.
         * To make sure the queue unmap was successful, driver need to
         * check those fields
         */
        mqd_mgr = dqm->mqd_mgrs[KFD_MQD_TYPE_HIQ];
        if (mqd_mgr->check_preemption_failed(mqd_mgr, dqm->packet_mgr.priv_queue->queue->mqd) &&
            reset_queues_on_hws_hang(dqm, false))
                goto reset_fail;

        /* Check for SDMA hang and attempt SDMA reset */
        if (sdma_has_hang(dqm) && reset_queues_on_hws_hang(dqm, true))
                goto reset_fail;

        /* We need to reset the grace period value for this device */
        if (grace_period != USE_DEFAULT_GRACE_PERIOD) {
                if (pm_config_dequeue_wait_counts(&dqm->packet_mgr,
                                KFD_DEQUEUE_WAIT_RESET, 0 /* unused */))
                        dev_err(dev, "Failed to reset grace period\n");
        }

        pm_release_ib(&dqm->packet_mgr);
        dqm->active_runlist = false;
out:
        up_read(&dqm->dev->adev->reset_domain->sem);
        return retval;

reset_fail:
        dqm->is_hws_hang = true;
        kfd_hws_hang(dqm);
        up_read(&dqm->dev->adev->reset_domain->sem);
        return -ETIME;
}

/* only for compute queue */
static int reset_queues_cpsch(struct device_queue_manager *dqm, uint16_t pasid)
{
        int retval;

        dqm_lock(dqm);

        retval = unmap_queues_cpsch(dqm, KFD_UNMAP_QUEUES_FILTER_BY_PASID,
                        pasid, USE_DEFAULT_GRACE_PERIOD, true);

        dqm_unlock(dqm);
        return retval;
}

/* dqm->lock mutex has to be locked before calling this function */
static int execute_queues_cpsch(struct device_queue_manager *dqm,
                                enum kfd_unmap_queues_filter filter,
                                uint32_t filter_param,
                                uint32_t grace_period)
{
        int retval;

        if (!down_read_trylock(&dqm->dev->adev->reset_domain->sem))
                return -EIO;
        retval = unmap_queues_cpsch(dqm, filter, filter_param, grace_period, false);
        if (!retval)
                retval = map_queues_cpsch(dqm);
        up_read(&dqm->dev->adev->reset_domain->sem);
        return retval;
}

static int wait_on_destroy_queue(struct device_queue_manager *dqm,
                                 struct queue *q)
{
        struct kfd_process_device *pdd = kfd_get_process_device_data(q->device,
                                                                q->process);
        int ret = 0;

        if (WARN_ON(!pdd))
                return ret;

        if (pdd->qpd.is_debug)
                return ret;

        q->properties.is_being_destroyed = true;

        if (pdd->process->debug_trap_enabled && q->properties.is_suspended) {
                dqm_unlock(dqm);
                mutex_unlock(&q->process->mutex);
                ret = wait_event_interruptible(dqm->destroy_wait,
                                                !q->properties.is_suspended);

                mutex_lock(&q->process->mutex);
                dqm_lock(dqm);
        }

        return ret;
}

static int destroy_queue_cpsch(struct device_queue_manager *dqm,
                                struct qcm_process_device *qpd,
                                struct queue *q)
{
        int retval;
        struct mqd_manager *mqd_mgr;
        uint64_t sdma_val = 0;
        struct kfd_process_device *pdd = qpd_to_pdd(qpd);
        struct device *dev = dqm->dev->adev->dev;

        /* Get the SDMA queue stats */
        if ((q->properties.type == KFD_QUEUE_TYPE_SDMA) ||
            (q->properties.type == KFD_QUEUE_TYPE_SDMA_XGMI)) {
                retval = read_sdma_queue_counter((uint64_t __user *)q->properties.read_ptr,
                                                        &sdma_val);
                if (retval)
                        dev_err(dev, "Failed to read SDMA queue counter for queue: %d\n",
                                q->properties.queue_id);
        }

        /* remove queue from list to prevent rescheduling after preemption */
        dqm_lock(dqm);

        retval = wait_on_destroy_queue(dqm, q);

        if (retval) {
                dqm_unlock(dqm);
                return retval;
        }

        if (qpd->is_debug) {
                /*
                 * error, currently we do not allow to destroy a queue
                 * of a currently debugged process
                 */
                retval = -EBUSY;
                goto failed_try_destroy_debugged_queue;

        }

        mqd_mgr = dqm->mqd_mgrs[get_mqd_type_from_queue_type(
                        q->properties.type)];

        deallocate_doorbell(qpd, q);

        if ((q->properties.type == KFD_QUEUE_TYPE_SDMA) ||
            (q->properties.type == KFD_QUEUE_TYPE_SDMA_XGMI)) {
                deallocate_sdma_queue(dqm, q);
                pdd->sdma_past_activity_counter += sdma_val;
        }

        if (q->properties.is_active) {
                decrement_queue_count(dqm, qpd, q);
                q->properties.is_active = false;
                if (!dqm->dev->kfd->shared_resources.enable_mes) {
                        retval = execute_queues_cpsch(dqm,
                                                      KFD_UNMAP_QUEUES_FILTER_DYNAMIC_QUEUES, 0,
                                                      USE_DEFAULT_GRACE_PERIOD);
                        if (retval == -ETIME)
                                qpd->reset_wavefronts = true;
                } else {
                        retval = remove_queue_mes(dqm, q, qpd);
                }
        }
        list_del(&q->list);
        qpd->queue_count--;

        /*
         * Unconditionally decrement this counter, regardless of the queue's
         * type
         */
        dqm->total_queue_count--;
        pr_debug("Total of %d queues are accountable so far\n",
                        dqm->total_queue_count);

        dqm_unlock(dqm);

        /*
         * Do free_mqd and raise delete event after dqm_unlock(dqm) to avoid
         * circular locking
         */
        kfd_dbg_ev_raise(KFD_EC_MASK(EC_DEVICE_QUEUE_DELETE),
                                qpd->pqm->process, q->device,
                                -1, false, NULL, 0);

        mqd_mgr->free_mqd(mqd_mgr, q->mqd, q->mqd_mem_obj);

        return retval;

failed_try_destroy_debugged_queue:

        dqm_unlock(dqm);
        return retval;
}

static bool set_cache_memory_policy(struct device_queue_manager *dqm,
                                   struct qcm_process_device *qpd,
                                   enum cache_policy default_policy,
                                   enum cache_policy alternate_policy,
                                   void __user *alternate_aperture_base,
                                   uint64_t alternate_aperture_size,
                                   u32 misc_process_properties)
{
        bool retval = true;

        if (!dqm->asic_ops.set_cache_memory_policy)
                return retval;

        dqm_lock(dqm);

        retval = dqm->asic_ops.set_cache_memory_policy(
                        dqm,
                        qpd,
                        default_policy,
                        alternate_policy,
                        alternate_aperture_base,
                        alternate_aperture_size,
                        misc_process_properties);

        if (retval)
                goto out;

        if ((dqm->sched_policy == KFD_SCHED_POLICY_NO_HWS) && (qpd->vmid != 0))
                program_sh_mem_settings(dqm, qpd);

        pr_debug("sh_mem_config: 0x%x, ape1_base: 0x%x, ape1_limit: 0x%x\n",
                qpd->sh_mem_config, qpd->sh_mem_ape1_base,
                qpd->sh_mem_ape1_limit);

out:
        dqm_unlock(dqm);
        return retval;
}

static int process_termination_nocpsch(struct device_queue_manager *dqm,
                struct qcm_process_device *qpd)
{
        struct queue *q;
        struct device_process_node *cur, *next_dpn;
        int retval = 0;
        bool found = false;

        dqm_lock(dqm);

        /* Clear all user mode queues */
        while (!list_empty(&qpd->queues_list)) {
                struct mqd_manager *mqd_mgr;
                int ret;

                q = list_first_entry(&qpd->queues_list, struct queue, list);
                mqd_mgr = dqm->mqd_mgrs[get_mqd_type_from_queue_type(
                                q->properties.type)];
                ret = destroy_queue_nocpsch_locked(dqm, qpd, q);
                if (ret)
                        retval = ret;
                dqm_unlock(dqm);
                mqd_mgr->free_mqd(mqd_mgr, q->mqd, q->mqd_mem_obj);
                dqm_lock(dqm);
        }

        /* Unregister process */
        list_for_each_entry_safe(cur, next_dpn, &dqm->queues, list) {
                if (qpd == cur->qpd) {
                        list_del(&cur->list);
                        kfree(cur);
                        dqm->processes_count--;
                        found = true;
                        break;
                }
        }

        dqm_unlock(dqm);

        /* Outside the DQM lock because under the DQM lock we can't do
         * reclaim or take other locks that others hold while reclaiming.
         */
        if (found)
                kfd_dec_compute_active(dqm->dev);

        return retval;
}

static int get_wave_state(struct device_queue_manager *dqm,
                          struct queue *q,
                          void __user *ctl_stack,
                          u32 *ctl_stack_used_size,
                          u32 *save_area_used_size)
{
        struct mqd_manager *mqd_mgr;

        dqm_lock(dqm);

        mqd_mgr = dqm->mqd_mgrs[KFD_MQD_TYPE_CP];

        if (q->properties.type != KFD_QUEUE_TYPE_COMPUTE ||
            q->properties.is_active || !q->device->kfd->cwsr_enabled ||
            !mqd_mgr->get_wave_state) {
                dqm_unlock(dqm);
                return -EINVAL;
        }

        dqm_unlock(dqm);

        /*
         * get_wave_state is outside the dqm lock to prevent circular locking
         * and the queue should be protected against destruction by the process
         * lock.
         */
        return mqd_mgr->get_wave_state(mqd_mgr, q->mqd, &q->properties,
                        ctl_stack, ctl_stack_used_size, save_area_used_size);
}

static void get_queue_checkpoint_info(struct device_queue_manager *dqm,
                        const struct queue *q,
                        u32 *mqd_size,
                        u32 *ctl_stack_size)
{
        struct mqd_manager *mqd_mgr;
        enum KFD_MQD_TYPE mqd_type =
                        get_mqd_type_from_queue_type(q->properties.type);

        dqm_lock(dqm);
        mqd_mgr = dqm->mqd_mgrs[mqd_type];
        *mqd_size = mqd_mgr->mqd_size * NUM_XCC(mqd_mgr->dev->xcc_mask);
        *ctl_stack_size = 0;

        if (q->properties.type == KFD_QUEUE_TYPE_COMPUTE && mqd_mgr->get_checkpoint_info)
                mqd_mgr->get_checkpoint_info(mqd_mgr, q->mqd, ctl_stack_size);

        dqm_unlock(dqm);
}

static int checkpoint_mqd(struct device_queue_manager *dqm,
                          const struct queue *q,
                          void *mqd,
                          void *ctl_stack)
{
        struct mqd_manager *mqd_mgr;
        int r = 0;
        enum KFD_MQD_TYPE mqd_type =
                        get_mqd_type_from_queue_type(q->properties.type);

        dqm_lock(dqm);

        if (q->properties.is_active || !q->device->kfd->cwsr_enabled) {
                r = -EINVAL;
                goto dqm_unlock;
        }

        mqd_mgr = dqm->mqd_mgrs[mqd_type];
        if (!mqd_mgr->checkpoint_mqd) {
                r = -EOPNOTSUPP;
                goto dqm_unlock;
        }

        mqd_mgr->checkpoint_mqd(mqd_mgr, q->mqd, mqd, ctl_stack);

dqm_unlock:
        dqm_unlock(dqm);
        return r;
}

static int process_termination_cpsch(struct device_queue_manager *dqm,
                struct qcm_process_device *qpd)
{
        int retval = 0;
        struct queue *q;
        struct device *dev = dqm->dev->adev->dev;
        struct kernel_queue *kq, *kq_next;
        struct mqd_manager *mqd_mgr;
        struct device_process_node *cur, *next_dpn;
        enum kfd_unmap_queues_filter filter =
                KFD_UNMAP_QUEUES_FILTER_DYNAMIC_QUEUES;
        bool found = false;

        dqm_lock(dqm);

        /* Clean all kernel queues */
        list_for_each_entry_safe(kq, kq_next, &qpd->priv_queue_list, list) {
                list_del(&kq->list);
                decrement_queue_count(dqm, qpd, kq->queue);
                qpd->is_debug = false;
                dqm->total_queue_count--;
                filter = KFD_UNMAP_QUEUES_FILTER_ALL_QUEUES;
        }

        /* Clear all user mode queues */
        list_for_each_entry(q, &qpd->queues_list, list) {
                if (q->properties.type == KFD_QUEUE_TYPE_SDMA)
                        deallocate_sdma_queue(dqm, q);
                else if (q->properties.type == KFD_QUEUE_TYPE_SDMA_XGMI)
                        deallocate_sdma_queue(dqm, q);

                if (q->properties.is_active) {
                        decrement_queue_count(dqm, qpd, q);

                        if (dqm->dev->kfd->shared_resources.enable_mes) {
                                retval = remove_queue_mes(dqm, q, qpd);
                                if (retval)
                                        dev_err(dev, "Failed to remove queue %d\n",
                                                q->properties.queue_id);
                        }
                }

                dqm->total_queue_count--;
        }

        /* Unregister process */
        list_for_each_entry_safe(cur, next_dpn, &dqm->queues, list) {
                if (qpd == cur->qpd) {
                        list_del(&cur->list);
                        kfree(cur);
                        dqm->processes_count--;
                        found = true;
                        break;
                }
        }

        if (!dqm->dev->kfd->shared_resources.enable_mes)
                retval = execute_queues_cpsch(dqm, filter, 0, USE_DEFAULT_GRACE_PERIOD);

        if ((retval || qpd->reset_wavefronts) &&
            down_read_trylock(&dqm->dev->adev->reset_domain->sem)) {
                pr_warn("Resetting wave fronts (cpsch) on dev %p\n", dqm->dev);
                dbgdev_wave_reset_wavefronts(dqm->dev, qpd->pqm->process);
                qpd->reset_wavefronts = false;
                up_read(&dqm->dev->adev->reset_domain->sem);
        }

        /* Lastly, free mqd resources.
         * Do free_mqd() after dqm_unlock to avoid circular locking.
         */
        while (!list_empty(&qpd->queues_list)) {
                q = list_first_entry(&qpd->queues_list, struct queue, list);
                mqd_mgr = dqm->mqd_mgrs[get_mqd_type_from_queue_type(
                                q->properties.type)];
                list_del(&q->list);
                qpd->queue_count--;
                dqm_unlock(dqm);
                mqd_mgr->free_mqd(mqd_mgr, q->mqd, q->mqd_mem_obj);
                dqm_lock(dqm);
        }
        dqm_unlock(dqm);

        /* Outside the DQM lock because under the DQM lock we can't do
         * reclaim or take other locks that others hold while reclaiming.
         */
        if (found)
                kfd_dec_compute_active(dqm->dev);

        return retval;
}

static int init_mqd_managers(struct device_queue_manager *dqm)
{
        int i, j;
        struct device *dev = dqm->dev->adev->dev;
        struct mqd_manager *mqd_mgr;

        for (i = 0; i < KFD_MQD_TYPE_MAX; i++) {
                mqd_mgr = dqm->asic_ops.mqd_manager_init(i, dqm->dev);
                if (!mqd_mgr) {
                        dev_err(dev, "mqd manager [%d] initialization failed\n", i);
                        goto out_free;
                }
                dqm->mqd_mgrs[i] = mqd_mgr;
        }

        return 0;

out_free:
        for (j = 0; j < i; j++) {
                kfree(dqm->mqd_mgrs[j]);
                dqm->mqd_mgrs[j] = NULL;
        }

        return -ENOMEM;
}

/* Allocate one hiq mqd (HWS) and all SDMA mqd in a continuous trunk*/
static int allocate_hiq_sdma_mqd(struct device_queue_manager *dqm)
{
        int retval;
        struct kfd_node *dev = dqm->dev;
        struct kfd_mem_obj *mem_obj = &dqm->hiq_sdma_mqd;
        uint32_t size = dqm->mqd_mgrs[KFD_MQD_TYPE_SDMA]->mqd_size *
                get_num_all_sdma_engines(dqm) *
                dev->kfd->device_info.num_sdma_queues_per_engine +
                (dqm->mqd_mgrs[KFD_MQD_TYPE_HIQ]->mqd_size *
                NUM_XCC(dqm->dev->xcc_mask));

        retval = amdgpu_amdkfd_alloc_kernel_mem(dev->adev, size,
                AMDGPU_GEM_DOMAIN_GTT,
                &(mem_obj->mem), &(mem_obj->gpu_addr),
                (void *)&(mem_obj->cpu_ptr), false);

        return retval;
}

static void deallocate_hiq_sdma_mqd(struct kfd_node *dev,
                                    struct kfd_mem_obj *mqd)
{
        WARN(!mqd, "No hiq sdma mqd trunk to free");

        amdgpu_amdkfd_free_kernel_mem(dev->adev, &mqd->mem);
}

struct device_queue_manager *device_queue_manager_init(struct kfd_node *dev)
{
        struct device_queue_manager *dqm;

        pr_debug("Loading device queue manager\n");

        dqm = kzalloc_obj(*dqm);
        if (!dqm)
                return NULL;

        switch (dev->adev->asic_type) {
        /* HWS is not available on Hawaii. */
        case CHIP_HAWAII:
        /* HWS depends on CWSR for timely dequeue. CWSR is not
         * available on Tonga.
         *
         * FIXME: This argument also applies to Kaveri.
         */
        case CHIP_TONGA:
                dqm->sched_policy = KFD_SCHED_POLICY_NO_HWS;
                break;
        default:
                dqm->sched_policy = sched_policy;
                break;
        }

        dqm->dev = dev;
        switch (dqm->sched_policy) {
        case KFD_SCHED_POLICY_HWS:
        case KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION:
                /* initialize dqm for cp scheduling */
                dqm->ops.create_queue = create_queue_cpsch;
                dqm->ops.initialize = initialize_cpsch;
                dqm->ops.start = start_cpsch;
                dqm->ops.stop = stop_cpsch;
                dqm->ops.halt = halt_cpsch;
                dqm->ops.unhalt = unhalt_cpsch;
                dqm->ops.destroy_queue = destroy_queue_cpsch;
                dqm->ops.update_queue = update_queue;
                dqm->ops.register_process = register_process;
                dqm->ops.unregister_process = unregister_process;
                dqm->ops.uninitialize = uninitialize;
                dqm->ops.create_kernel_queue = create_kernel_queue_cpsch;
                dqm->ops.destroy_kernel_queue = destroy_kernel_queue_cpsch;
                dqm->ops.set_cache_memory_policy = set_cache_memory_policy;
                dqm->ops.process_termination = process_termination_cpsch;
                dqm->ops.evict_process_queues = evict_process_queues_cpsch;
                dqm->ops.restore_process_queues = restore_process_queues_cpsch;
                dqm->ops.get_wave_state = get_wave_state;
                dqm->ops.reset_queues = reset_queues_cpsch;
                dqm->ops.get_queue_checkpoint_info = get_queue_checkpoint_info;
                dqm->ops.checkpoint_mqd = checkpoint_mqd;
                break;
        case KFD_SCHED_POLICY_NO_HWS:
                /* initialize dqm for no cp scheduling */
                dqm->ops.start = start_nocpsch;
                dqm->ops.stop = stop_nocpsch;
                dqm->ops.create_queue = create_queue_nocpsch;
                dqm->ops.destroy_queue = destroy_queue_nocpsch;
                dqm->ops.update_queue = update_queue;
                dqm->ops.register_process = register_process;
                dqm->ops.unregister_process = unregister_process;
                dqm->ops.initialize = initialize_nocpsch;
                dqm->ops.uninitialize = uninitialize;
                dqm->ops.set_cache_memory_policy = set_cache_memory_policy;
                dqm->ops.process_termination = process_termination_nocpsch;
                dqm->ops.evict_process_queues = evict_process_queues_nocpsch;
                dqm->ops.restore_process_queues =
                        restore_process_queues_nocpsch;
                dqm->ops.get_wave_state = get_wave_state;
                dqm->ops.get_queue_checkpoint_info = get_queue_checkpoint_info;
                dqm->ops.checkpoint_mqd = checkpoint_mqd;
                break;
        default:
                dev_err(dev->adev->dev, "Invalid scheduling policy %d\n", dqm->sched_policy);
                goto out_free;
        }

        switch (dev->adev->asic_type) {
        case CHIP_KAVERI:
        case CHIP_HAWAII:
                device_queue_manager_init_cik(&dqm->asic_ops);
                break;

        case CHIP_CARRIZO:
        case CHIP_TONGA:
        case CHIP_FIJI:
        case CHIP_POLARIS10:
        case CHIP_POLARIS11:
        case CHIP_POLARIS12:
        case CHIP_VEGAM:
                device_queue_manager_init_vi(&dqm->asic_ops);
                break;

        default:
                if (KFD_GC_VERSION(dev) >= IP_VERSION(12, 1, 0))
                        device_queue_manager_init_v12_1(&dqm->asic_ops);
                else if (KFD_GC_VERSION(dev) >= IP_VERSION(12, 0, 0))
                        device_queue_manager_init_v12(&dqm->asic_ops);
                else if (KFD_GC_VERSION(dev) >= IP_VERSION(11, 0, 0))
                        device_queue_manager_init_v11(&dqm->asic_ops);
                else if (KFD_GC_VERSION(dev) >= IP_VERSION(10, 1, 1))
                        device_queue_manager_init_v10(&dqm->asic_ops);
                else if (KFD_GC_VERSION(dev) >= IP_VERSION(9, 0, 1))
                        device_queue_manager_init_v9(&dqm->asic_ops);
                else {
                        WARN(1, "Unexpected ASIC family %u",
                             dev->adev->asic_type);
                        goto out_free;
                }
        }

        if (init_mqd_managers(dqm))
                goto out_free;

        if (!dev->kfd->shared_resources.enable_mes && allocate_hiq_sdma_mqd(dqm)) {
                dev_err(dev->adev->dev, "Failed to allocate hiq sdma mqd trunk buffer\n");
                goto out_free;
        }

        if (!dqm->ops.initialize(dqm)) {
                init_waitqueue_head(&dqm->destroy_wait);
                return dqm;
        }

        if (!dev->kfd->shared_resources.enable_mes)
                deallocate_hiq_sdma_mqd(dev, &dqm->hiq_sdma_mqd);

out_free:
        kfree(dqm);
        return NULL;
}

void device_queue_manager_uninit(struct device_queue_manager *dqm)
{
        dqm->ops.stop(dqm);
        dqm->ops.uninitialize(dqm);
        if (!dqm->dev->kfd->shared_resources.enable_mes)
                deallocate_hiq_sdma_mqd(dqm->dev, &dqm->hiq_sdma_mqd);
        kfree(dqm);
}

int kfd_dqm_suspend_bad_queue_mes(struct kfd_node *knode, u32 pasid, u32 doorbell_id)
{
        struct kfd_process_device *pdd = NULL;
        struct kfd_process *p = kfd_lookup_process_by_pasid(pasid, &pdd);
        struct device_queue_manager *dqm = knode->dqm;
        struct device *dev = dqm->dev->adev->dev;
        struct qcm_process_device *qpd;
        struct queue *q = NULL;
        int ret = 0;

        if (!pdd)
                return -EINVAL;

        dqm_lock(dqm);

        if (pdd) {
                qpd = &pdd->qpd;

                list_for_each_entry(q, &qpd->queues_list, list) {
                        if (q->doorbell_id == doorbell_id && q->properties.is_active) {
                                ret = suspend_all_queues_mes(dqm);
                                if (ret) {
                                        dev_err(dev, "Suspending all queues failed");
                                        goto out;
                                }

                                q->properties.is_evicted = true;
                                q->properties.is_active = false;
                                decrement_queue_count(dqm, qpd, q);

                                ret = remove_queue_mes(dqm, q, qpd);
                                if (ret) {
                                        dev_err(dev, "Removing bad queue failed");
                                        goto out;
                                }

                                ret = resume_all_queues_mes(dqm);
                                if (ret)
                                        dev_err(dev, "Resuming all queues failed");

                                break;
                        }
                }
        }

out:
        dqm_unlock(dqm);
        kfd_unref_process(p);
        return ret;
}

int kfd_evict_process_device(struct kfd_process_device *pdd)
{
        struct device_queue_manager *dqm;
        struct kfd_process *p;

        p = pdd->process;
        dqm = pdd->dev->dqm;

        WARN(debug_evictions, "Evicting pid %d", p->lead_thread->pid);

        return dqm->ops.evict_process_queues(dqm, &pdd->qpd);
}

int reserve_debug_trap_vmid(struct device_queue_manager *dqm,
                                struct qcm_process_device *qpd)
{
        int r;
        struct device *dev = dqm->dev->adev->dev;
        int updated_vmid_mask;

        if (dqm->sched_policy == KFD_SCHED_POLICY_NO_HWS) {
                dev_err(dev, "Unsupported on sched_policy: %i\n", dqm->sched_policy);
                return -EINVAL;
        }

        dqm_lock(dqm);

        if (dqm->trap_debug_vmid != 0) {
                dev_err(dev, "Trap debug id already reserved\n");
                r = -EBUSY;
                goto out_unlock;
        }

        r = unmap_queues_cpsch(dqm, KFD_UNMAP_QUEUES_FILTER_ALL_QUEUES, 0,
                        USE_DEFAULT_GRACE_PERIOD, false);
        if (r)
                goto out_unlock;

        updated_vmid_mask = dqm->dev->kfd->shared_resources.compute_vmid_bitmap;
        updated_vmid_mask &= ~(1 << dqm->dev->vm_info.last_vmid_kfd);

        dqm->dev->kfd->shared_resources.compute_vmid_bitmap = updated_vmid_mask;
        dqm->trap_debug_vmid = dqm->dev->vm_info.last_vmid_kfd;
        r = set_sched_resources(dqm);
        if (r)
                goto out_unlock;

        r = map_queues_cpsch(dqm);
        if (r)
                goto out_unlock;

        pr_debug("Reserved VMID for trap debug: %i\n", dqm->trap_debug_vmid);

out_unlock:
        dqm_unlock(dqm);
        return r;
}

/*
 * Releases vmid for the trap debugger
 */
int release_debug_trap_vmid(struct device_queue_manager *dqm,
                        struct qcm_process_device *qpd)
{
        struct device *dev = dqm->dev->adev->dev;
        int r;
        int updated_vmid_mask;
        uint32_t trap_debug_vmid;

        if (dqm->sched_policy == KFD_SCHED_POLICY_NO_HWS) {
                dev_err(dev, "Unsupported on sched_policy: %i\n", dqm->sched_policy);
                return -EINVAL;
        }

        dqm_lock(dqm);
        trap_debug_vmid = dqm->trap_debug_vmid;
        if (dqm->trap_debug_vmid == 0) {
                dev_err(dev, "Trap debug id is not reserved\n");
                r = -EINVAL;
                goto out_unlock;
        }

        r = unmap_queues_cpsch(dqm, KFD_UNMAP_QUEUES_FILTER_ALL_QUEUES, 0,
                        USE_DEFAULT_GRACE_PERIOD, false);
        if (r)
                goto out_unlock;

        updated_vmid_mask = dqm->dev->kfd->shared_resources.compute_vmid_bitmap;
        updated_vmid_mask |= (1 << dqm->dev->vm_info.last_vmid_kfd);

        dqm->dev->kfd->shared_resources.compute_vmid_bitmap = updated_vmid_mask;
        dqm->trap_debug_vmid = 0;
        r = set_sched_resources(dqm);
        if (r)
                goto out_unlock;

        r = map_queues_cpsch(dqm);
        if (r)
                goto out_unlock;

        pr_debug("Released VMID for trap debug: %i\n", trap_debug_vmid);

out_unlock:
        dqm_unlock(dqm);
        return r;
}

#define QUEUE_NOT_FOUND         -1
/* invalidate queue operation in array */
static void q_array_invalidate(uint32_t num_queues, uint32_t *queue_ids)
{
        int i;

        for (i = 0; i < num_queues; i++)
                queue_ids[i] |= KFD_DBG_QUEUE_INVALID_MASK;
}

/* find queue index in array */
static int q_array_get_index(unsigned int queue_id,
                uint32_t num_queues,
                uint32_t *queue_ids)
{
        int i;

        for (i = 0; i < num_queues; i++)
                if (queue_id == (queue_ids[i] & ~KFD_DBG_QUEUE_INVALID_MASK))
                        return i;

        return QUEUE_NOT_FOUND;
}

struct copy_context_work_handler_workarea {
        struct work_struct copy_context_work;
        struct kfd_process *p;
};

static void copy_context_work_handler(struct work_struct *work)
{
        struct copy_context_work_handler_workarea *workarea;
        struct mqd_manager *mqd_mgr;
        struct queue *q;
        struct mm_struct *mm;
        struct kfd_process *p;
        uint32_t tmp_ctl_stack_used_size, tmp_save_area_used_size;
        int i;

        workarea = container_of(work,
                        struct copy_context_work_handler_workarea,
                        copy_context_work);

        p = workarea->p;
        mm = get_task_mm(p->lead_thread);

        if (!mm)
                return;

        kthread_use_mm(mm);
        for (i = 0; i < p->n_pdds; i++) {
                struct kfd_process_device *pdd = p->pdds[i];
                struct device_queue_manager *dqm = pdd->dev->dqm;
                struct qcm_process_device *qpd = &pdd->qpd;

                list_for_each_entry(q, &qpd->queues_list, list) {
                        if (q->properties.type != KFD_QUEUE_TYPE_COMPUTE)
                                continue;

                        mqd_mgr = dqm->mqd_mgrs[KFD_MQD_TYPE_CP];

                        /* We ignore the return value from get_wave_state
                         * because
                         * i) right now, it always returns 0, and
                         * ii) if we hit an error, we would continue to the
                         *      next queue anyway.
                         */
                        mqd_mgr->get_wave_state(mqd_mgr,
                                        q->mqd,
                                        &q->properties,
                                        (void __user *) q->properties.ctx_save_restore_area_address,
                                        &tmp_ctl_stack_used_size,
                                        &tmp_save_area_used_size);
                }
        }
        kthread_unuse_mm(mm);
        mmput(mm);
}

static uint32_t *get_queue_ids(uint32_t num_queues, uint32_t *usr_queue_id_array)
{
        size_t array_size = num_queues * sizeof(uint32_t);

        if (!usr_queue_id_array)
                return NULL;

        return memdup_user(usr_queue_id_array, array_size);
}

int resume_queues(struct kfd_process *p,
                uint32_t num_queues,
                uint32_t *usr_queue_id_array)
{
        uint32_t *queue_ids = NULL;
        int total_resumed = 0;
        int i;

        if (usr_queue_id_array) {
                queue_ids = get_queue_ids(num_queues, usr_queue_id_array);

                if (IS_ERR(queue_ids))
                        return PTR_ERR(queue_ids);

                /* mask all queues as invalid.  unmask per successful request */
                q_array_invalidate(num_queues, queue_ids);
        }

        for (i = 0; i < p->n_pdds; i++) {
                struct kfd_process_device *pdd = p->pdds[i];
                struct device_queue_manager *dqm = pdd->dev->dqm;
                struct device *dev = dqm->dev->adev->dev;
                struct qcm_process_device *qpd = &pdd->qpd;
                struct queue *q;
                int r, per_device_resumed = 0;

                dqm_lock(dqm);

                /* unmask queues that resume or already resumed as valid */
                list_for_each_entry(q, &qpd->queues_list, list) {
                        int q_idx = QUEUE_NOT_FOUND;

                        if (queue_ids)
                                q_idx = q_array_get_index(
                                                q->properties.queue_id,
                                                num_queues,
                                                queue_ids);

                        if (!queue_ids || q_idx != QUEUE_NOT_FOUND) {
                                int err = resume_single_queue(dqm, &pdd->qpd, q);

                                if (queue_ids) {
                                        if (!err) {
                                                queue_ids[q_idx] &=
                                                        ~KFD_DBG_QUEUE_INVALID_MASK;
                                        } else {
                                                queue_ids[q_idx] |=
                                                        KFD_DBG_QUEUE_ERROR_MASK;
                                                break;
                                        }
                                }

                                if (dqm->dev->kfd->shared_resources.enable_mes) {
                                        wake_up_all(&dqm->destroy_wait);
                                        if (!err)
                                                total_resumed++;
                                } else {
                                        per_device_resumed++;
                                }
                        }
                }

                if (!per_device_resumed) {
                        dqm_unlock(dqm);
                        continue;
                }

                r = execute_queues_cpsch(dqm,
                                        KFD_UNMAP_QUEUES_FILTER_DYNAMIC_QUEUES,
                                        0,
                                        USE_DEFAULT_GRACE_PERIOD);
                if (r) {
                        dev_err(dev, "Failed to resume process queues\n");
                        if (queue_ids) {
                                list_for_each_entry(q, &qpd->queues_list, list) {
                                        int q_idx = q_array_get_index(
                                                        q->properties.queue_id,
                                                        num_queues,
                                                        queue_ids);

                                        /* mask queue as error on resume fail */
                                        if (q_idx != QUEUE_NOT_FOUND)
                                                queue_ids[q_idx] |=
                                                        KFD_DBG_QUEUE_ERROR_MASK;
                                }
                        }
                } else {
                        wake_up_all(&dqm->destroy_wait);
                        total_resumed += per_device_resumed;
                }

                dqm_unlock(dqm);
        }

        if (queue_ids) {
                if (copy_to_user((void __user *)usr_queue_id_array, queue_ids,
                                num_queues * sizeof(uint32_t)))
                        pr_err("copy_to_user failed on queue resume\n");

                kfree(queue_ids);
        }

        return total_resumed;
}

int suspend_queues(struct kfd_process *p,
                        uint32_t num_queues,
                        uint32_t grace_period,
                        uint64_t exception_clear_mask,
                        uint32_t *usr_queue_id_array)
{
        uint32_t *queue_ids = get_queue_ids(num_queues, usr_queue_id_array);
        int total_suspended = 0;
        int i;

        if (IS_ERR(queue_ids))
                return PTR_ERR(queue_ids);

        /* mask all queues as invalid.  umask on successful request */
        q_array_invalidate(num_queues, queue_ids);

        for (i = 0; i < p->n_pdds; i++) {
                struct kfd_process_device *pdd = p->pdds[i];
                struct device_queue_manager *dqm = pdd->dev->dqm;
                struct device *dev = dqm->dev->adev->dev;
                struct qcm_process_device *qpd = &pdd->qpd;
                struct queue *q;
                int r, per_device_suspended = 0;

                mutex_lock(&p->event_mutex);
                dqm_lock(dqm);

                /* unmask queues that suspend or already suspended */
                list_for_each_entry(q, &qpd->queues_list, list) {
                        int q_idx = q_array_get_index(q->properties.queue_id,
                                                        num_queues,
                                                        queue_ids);

                        if (q_idx != QUEUE_NOT_FOUND) {
                                int err = suspend_single_queue(dqm, pdd, q);
                                bool is_mes = dqm->dev->kfd->shared_resources.enable_mes;

                                if (!err) {
                                        queue_ids[q_idx] &= ~KFD_DBG_QUEUE_INVALID_MASK;
                                        if (exception_clear_mask && is_mes)
                                                q->properties.exception_status &=
                                                        ~exception_clear_mask;

                                        if (is_mes)
                                                total_suspended++;
                                        else
                                                per_device_suspended++;
                                } else if (err != -EBUSY) {
                                        queue_ids[q_idx] |= KFD_DBG_QUEUE_ERROR_MASK;
                                        break;
                                }
                        }
                }

                if (!per_device_suspended) {
                        dqm_unlock(dqm);
                        mutex_unlock(&p->event_mutex);
                        if (total_suspended)
                                amdgpu_amdkfd_debug_mem_fence(dqm->dev->adev);
                        continue;
                }

                r = execute_queues_cpsch(dqm,
                        KFD_UNMAP_QUEUES_FILTER_DYNAMIC_QUEUES, 0,
                        grace_period);

                if (r)
                        dev_err(dev, "Failed to suspend process queues.\n");
                else
                        total_suspended += per_device_suspended;

                list_for_each_entry(q, &qpd->queues_list, list) {
                        int q_idx = q_array_get_index(q->properties.queue_id,
                                                num_queues, queue_ids);

                        if (q_idx == QUEUE_NOT_FOUND)
                                continue;

                        /* mask queue as error on suspend fail */
                        if (r)
                                queue_ids[q_idx] |= KFD_DBG_QUEUE_ERROR_MASK;
                        else if (exception_clear_mask)
                                q->properties.exception_status &=
                                                        ~exception_clear_mask;
                }

                dqm_unlock(dqm);
                mutex_unlock(&p->event_mutex);
                amdgpu_device_flush_hdp(dqm->dev->adev, NULL);
        }

        if (total_suspended) {
                struct copy_context_work_handler_workarea copy_context_worker;

                INIT_WORK_ONSTACK(
                                &copy_context_worker.copy_context_work,
                                copy_context_work_handler);

                copy_context_worker.p = p;

                schedule_work(&copy_context_worker.copy_context_work);


                flush_work(&copy_context_worker.copy_context_work);
                destroy_work_on_stack(&copy_context_worker.copy_context_work);
        }

        if (copy_to_user((void __user *)usr_queue_id_array, queue_ids,
                        num_queues * sizeof(uint32_t)))
                pr_err("copy_to_user failed on queue suspend\n");

        kfree(queue_ids);

        return total_suspended;
}

static uint32_t set_queue_type_for_user(struct queue_properties *q_props)
{
        switch (q_props->type) {
        case KFD_QUEUE_TYPE_COMPUTE:
                return q_props->format == KFD_QUEUE_FORMAT_PM4
                                        ? KFD_IOC_QUEUE_TYPE_COMPUTE
                                        : KFD_IOC_QUEUE_TYPE_COMPUTE_AQL;
        case KFD_QUEUE_TYPE_SDMA:
                return KFD_IOC_QUEUE_TYPE_SDMA;
        case KFD_QUEUE_TYPE_SDMA_XGMI:
                return KFD_IOC_QUEUE_TYPE_SDMA_XGMI;
        default:
                WARN_ONCE(true, "queue type not recognized!");
                return 0xffffffff;
        };
}

void set_queue_snapshot_entry(struct queue *q,
                              uint64_t exception_clear_mask,
                              struct kfd_queue_snapshot_entry *qss_entry)
{
        qss_entry->ring_base_address = q->properties.queue_address;
        qss_entry->write_pointer_address = (uint64_t)q->properties.write_ptr;
        qss_entry->read_pointer_address = (uint64_t)q->properties.read_ptr;
        qss_entry->ctx_save_restore_address =
                                q->properties.ctx_save_restore_area_address;
        qss_entry->ctx_save_restore_area_size =
                                q->properties.ctx_save_restore_area_size;
        qss_entry->exception_status = q->properties.exception_status;
        qss_entry->queue_id = q->properties.queue_id;
        qss_entry->gpu_id = q->device->id;
        qss_entry->ring_size = (uint32_t)q->properties.queue_size;
        qss_entry->queue_type = set_queue_type_for_user(&q->properties);
        q->properties.exception_status &= ~exception_clear_mask;
}

int debug_lock_and_unmap(struct device_queue_manager *dqm)
{
        struct device *dev = dqm->dev->adev->dev;
        int r;

        if (dqm->sched_policy == KFD_SCHED_POLICY_NO_HWS) {
                dev_err(dev, "Unsupported on sched_policy: %i\n", dqm->sched_policy);
                return -EINVAL;
        }

        if (!kfd_dbg_is_per_vmid_supported(dqm->dev))
                return 0;

        dqm_lock(dqm);

        r = unmap_queues_cpsch(dqm, KFD_UNMAP_QUEUES_FILTER_ALL_QUEUES, 0, 0, false);
        if (r)
                dqm_unlock(dqm);

        return r;
}

int debug_map_and_unlock(struct device_queue_manager *dqm)
{
        struct device *dev = dqm->dev->adev->dev;
        int r;

        if (dqm->sched_policy == KFD_SCHED_POLICY_NO_HWS) {
                dev_err(dev, "Unsupported on sched_policy: %i\n", dqm->sched_policy);
                return -EINVAL;
        }

        if (!kfd_dbg_is_per_vmid_supported(dqm->dev))
                return 0;

        r = map_queues_cpsch(dqm);

        dqm_unlock(dqm);

        return r;
}

int debug_refresh_runlist(struct device_queue_manager *dqm)
{
        int r = debug_lock_and_unmap(dqm);

        if (r)
                return r;

        return debug_map_and_unlock(dqm);
}

bool kfd_dqm_is_queue_in_process(struct device_queue_manager *dqm,
                                 struct qcm_process_device *qpd,
                                 int doorbell_off, u32 *queue_format)
{
        struct queue *q;
        bool r = false;

        if (!queue_format)
                return r;

        dqm_lock(dqm);

        list_for_each_entry(q, &qpd->queues_list, list) {
                if (q->properties.doorbell_off == doorbell_off) {
                        *queue_format = q->properties.format;
                        r = true;
                        goto out;
                }
        }

out:
        dqm_unlock(dqm);
        return r;
}
#if defined(CONFIG_DEBUG_FS)

static void seq_reg_dump(struct seq_file *m,
                         uint32_t (*dump)[2], uint32_t n_regs)
{
        uint32_t i, count;

        for (i = 0, count = 0; i < n_regs; i++) {
                if (count == 0 ||
                    dump[i-1][0] + sizeof(uint32_t) != dump[i][0]) {
                        seq_printf(m, "%s    %08x: %08x",
                                   i ? "\n" : "",
                                   dump[i][0], dump[i][1]);
                        count = 7;
                } else {
                        seq_printf(m, " %08x", dump[i][1]);
                        count--;
                }
        }

        seq_puts(m, "\n");
}

int dqm_debugfs_hqds(struct seq_file *m, void *data)
{
        struct device_queue_manager *dqm = data;
        uint32_t xcc_mask = dqm->dev->xcc_mask;
        uint32_t (*dump)[2], n_regs;
        int pipe, queue;
        int r = 0, xcc_id;
        uint32_t sdma_engine_start;

        if (!dqm->sched_running) {
                seq_puts(m, " Device is stopped\n");
                return 0;
        }

        for_each_inst(xcc_id, xcc_mask) {
                r = dqm->dev->kfd2kgd->hqd_dump(dqm->dev->adev,
                                                KFD_CIK_HIQ_PIPE,
                                                KFD_CIK_HIQ_QUEUE, &dump,
                                                &n_regs, xcc_id);
                if (!r) {
                        seq_printf(
                                m,
                                "   Inst %d, HIQ on MEC %d Pipe %d Queue %d\n",
                                xcc_id,
                                KFD_CIK_HIQ_PIPE / get_pipes_per_mec(dqm) + 1,
                                KFD_CIK_HIQ_PIPE % get_pipes_per_mec(dqm),
                                KFD_CIK_HIQ_QUEUE);
                        seq_reg_dump(m, dump, n_regs);

                        kfree(dump);
                }

                for (pipe = 0; pipe < get_pipes_per_mec(dqm); pipe++) {
                        int pipe_offset = pipe * get_queues_per_pipe(dqm);

                        for (queue = 0; queue < get_queues_per_pipe(dqm); queue++) {
                                if (!test_bit(pipe_offset + queue,
                                      dqm->dev->kfd->shared_resources.cp_queue_bitmap))
                                        continue;

                                r = dqm->dev->kfd2kgd->hqd_dump(dqm->dev->adev,
                                                                pipe, queue,
                                                                &dump, &n_regs,
                                                                xcc_id);
                                if (r)
                                        break;

                                seq_printf(m,
                                           " Inst %d,  CP Pipe %d, Queue %d\n",
                                           xcc_id, pipe, queue);
                                seq_reg_dump(m, dump, n_regs);

                                kfree(dump);
                        }
                }
        }

        sdma_engine_start = dqm->dev->node_id * get_num_all_sdma_engines(dqm);
        for (pipe = sdma_engine_start;
             pipe < (sdma_engine_start + get_num_all_sdma_engines(dqm));
             pipe++) {
                for (queue = 0;
                     queue < dqm->dev->kfd->device_info.num_sdma_queues_per_engine;
                     queue++) {
                        r = dqm->dev->kfd2kgd->hqd_sdma_dump(
                                dqm->dev->adev, pipe, queue, &dump, &n_regs);
                        if (r)
                                break;

                        seq_printf(m, "  SDMA Engine %d, RLC %d\n",
                                  pipe, queue);
                        seq_reg_dump(m, dump, n_regs);

                        kfree(dump);
                }
        }

        return r;
}

int dqm_debugfs_hang_hws(struct device_queue_manager *dqm)
{
        int r = 0;

        dqm_lock(dqm);
        r = pm_debugfs_hang_hws(&dqm->packet_mgr);
        if (r) {
                dqm_unlock(dqm);
                return r;
        }
        dqm->active_runlist = true;
        r = execute_queues_cpsch(dqm, KFD_UNMAP_QUEUES_FILTER_ALL_QUEUES,
                                0, USE_DEFAULT_GRACE_PERIOD);
        dqm_unlock(dqm);

        return r;
}

#endif