Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 3410 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
new file mode 100644
index 000000000..c37f1fcd2
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
@@ -0,0 +1,3410 @@
+// 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/device.h>
+#include <linux/export.h>
+#include <linux/err.h>
+#include <linux/fs.h>
+#include <linux/file.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/uaccess.h>
+#include <linux/compat.h>
+#include <uapi/linux/kfd_ioctl.h>
+#include <linux/time.h>
+#include <linux/mm.h>
+#include <linux/mman.h>
+#include <linux/ptrace.h>
+#include <linux/dma-buf.h>
+#include <linux/fdtable.h>
+#include <linux/processor.h>
+#include "kfd_priv.h"
+#include "kfd_device_queue_manager.h"
+#include "kfd_svm.h"
+#include "amdgpu_amdkfd.h"
+#include "kfd_smi_events.h"
+#include "amdgpu_dma_buf.h"
+#include "kfd_debug.h"
+
+static long kfd_ioctl(struct file *, unsigned int, unsigned long);
+static int kfd_open(struct inode *, struct file *);
+static int kfd_release(struct inode *, struct file *);
+static int kfd_mmap(struct file *, struct vm_area_struct *);
+
+static const char kfd_dev_name[] = "kfd";
+
+static const struct file_operations kfd_fops = {
+	.owner = THIS_MODULE,
+	.unlocked_ioctl = kfd_ioctl,
+	.compat_ioctl = compat_ptr_ioctl,
+	.open = kfd_open,
+	.release = kfd_release,
+	.mmap = kfd_mmap,
+};
+
+static int kfd_char_dev_major = -1;
+static struct class *kfd_class;
+struct device *kfd_device;
+
+static inline struct kfd_process_device *kfd_lock_pdd_by_id(struct kfd_process *p, __u32 gpu_id)
+{
+	struct kfd_process_device *pdd;
+
+	mutex_lock(&p->mutex);
+	pdd = kfd_process_device_data_by_id(p, gpu_id);
+
+	if (pdd)
+		return pdd;
+
+	mutex_unlock(&p->mutex);
+	return NULL;
+}
+
+static inline void kfd_unlock_pdd(struct kfd_process_device *pdd)
+{
+	mutex_unlock(&pdd->process->mutex);
+}
+
+int kfd_chardev_init(void)
+{
+	int err = 0;
+
+	kfd_char_dev_major = register_chrdev(0, kfd_dev_name, &kfd_fops);
+	err = kfd_char_dev_major;
+	if (err < 0)
+		goto err_register_chrdev;
+
+	kfd_class = class_create(kfd_dev_name);
+	err = PTR_ERR(kfd_class);
+	if (IS_ERR(kfd_class))
+		goto err_class_create;
+
+	kfd_device = device_create(kfd_class, NULL,
+					MKDEV(kfd_char_dev_major, 0),
+					NULL, kfd_dev_name);
+	err = PTR_ERR(kfd_device);
+	if (IS_ERR(kfd_device))
+		goto err_device_create;
+
+	return 0;
+
+err_device_create:
+	class_destroy(kfd_class);
+err_class_create:
+	unregister_chrdev(kfd_char_dev_major, kfd_dev_name);
+err_register_chrdev:
+	return err;
+}
+
+void kfd_chardev_exit(void)
+{
+	device_destroy(kfd_class, MKDEV(kfd_char_dev_major, 0));
+	class_destroy(kfd_class);
+	unregister_chrdev(kfd_char_dev_major, kfd_dev_name);
+	kfd_device = NULL;
+}
+
+
+static int kfd_open(struct inode *inode, struct file *filep)
+{
+	struct kfd_process *process;
+	bool is_32bit_user_mode;
+
+	if (iminor(inode) != 0)
+		return -ENODEV;
+
+	is_32bit_user_mode = in_compat_syscall();
+
+	if (is_32bit_user_mode) {
+		dev_warn(kfd_device,
+			"Process %d (32-bit) failed to open /dev/kfd\n"
+			"32-bit processes are not supported by amdkfd\n",
+			current->pid);
+		return -EPERM;
+	}
+
+	process = kfd_create_process(current);
+	if (IS_ERR(process))
+		return PTR_ERR(process);
+
+	if (kfd_process_init_cwsr_apu(process, filep)) {
+		kfd_unref_process(process);
+		return -EFAULT;
+	}
+
+	/* filep now owns the reference returned by kfd_create_process */
+	filep->private_data = process;
+
+	dev_dbg(kfd_device, "process %d opened, compat mode (32 bit) - %d\n",
+		process->pasid, process->is_32bit_user_mode);
+
+	return 0;
+}
+
+static int kfd_release(struct inode *inode, struct file *filep)
+{
+	struct kfd_process *process = filep->private_data;
+
+	if (process)
+		kfd_unref_process(process);
+
+	return 0;
+}
+
+static int kfd_ioctl_get_version(struct file *filep, struct kfd_process *p,
+					void *data)
+{
+	struct kfd_ioctl_get_version_args *args = data;
+
+	args->major_version = KFD_IOCTL_MAJOR_VERSION;
+	args->minor_version = KFD_IOCTL_MINOR_VERSION;
+
+	return 0;
+}
+
+static int set_queue_properties_from_user(struct queue_properties *q_properties,
+				struct kfd_ioctl_create_queue_args *args)
+{
+	/*
+	 * Repurpose queue percentage to accommodate new features:
+	 * bit 0-7: queue percentage
+	 * bit 8-15: pm4_target_xcc
+	 */
+	if ((args->queue_percentage & 0xFF) > KFD_MAX_QUEUE_PERCENTAGE) {
+		pr_err("Queue percentage must be between 0 to KFD_MAX_QUEUE_PERCENTAGE\n");
+		return -EINVAL;
+	}
+
+	if (args->queue_priority > KFD_MAX_QUEUE_PRIORITY) {
+		pr_err("Queue priority must be between 0 to KFD_MAX_QUEUE_PRIORITY\n");
+		return -EINVAL;
+	}
+
+	if ((args->ring_base_address) &&
+		(!access_ok((const void __user *) args->ring_base_address,
+			sizeof(uint64_t)))) {
+		pr_err("Can't access ring base address\n");
+		return -EFAULT;
+	}
+
+	if (!is_power_of_2(args->ring_size) && (args->ring_size != 0)) {
+		pr_err("Ring size must be a power of 2 or 0\n");
+		return -EINVAL;
+	}
+
+	if (!access_ok((const void __user *) args->read_pointer_address,
+			sizeof(uint32_t))) {
+		pr_err("Can't access read pointer\n");
+		return -EFAULT;
+	}
+
+	if (!access_ok((const void __user *) args->write_pointer_address,
+			sizeof(uint32_t))) {
+		pr_err("Can't access write pointer\n");
+		return -EFAULT;
+	}
+
+	if (args->eop_buffer_address &&
+		!access_ok((const void __user *) args->eop_buffer_address,
+			sizeof(uint32_t))) {
+		pr_debug("Can't access eop buffer");
+		return -EFAULT;
+	}
+
+	if (args->ctx_save_restore_address &&
+		!access_ok((const void __user *) args->ctx_save_restore_address,
+			sizeof(uint32_t))) {
+		pr_debug("Can't access ctx save restore buffer");
+		return -EFAULT;
+	}
+
+	q_properties->is_interop = false;
+	q_properties->is_gws = false;
+	q_properties->queue_percent = args->queue_percentage & 0xFF;
+	/* bit 8-15 are repurposed to be PM4 target XCC */
+	q_properties->pm4_target_xcc = (args->queue_percentage >> 8) & 0xFF;
+	q_properties->priority = args->queue_priority;
+	q_properties->queue_address = args->ring_base_address;
+	q_properties->queue_size = args->ring_size;
+	q_properties->read_ptr = (uint32_t *) args->read_pointer_address;
+	q_properties->write_ptr = (uint32_t *) args->write_pointer_address;
+	q_properties->eop_ring_buffer_address = args->eop_buffer_address;
+	q_properties->eop_ring_buffer_size = args->eop_buffer_size;
+	q_properties->ctx_save_restore_area_address =
+			args->ctx_save_restore_address;
+	q_properties->ctx_save_restore_area_size = args->ctx_save_restore_size;
+	q_properties->ctl_stack_size = args->ctl_stack_size;
+	if (args->queue_type == KFD_IOC_QUEUE_TYPE_COMPUTE ||
+		args->queue_type == KFD_IOC_QUEUE_TYPE_COMPUTE_AQL)
+		q_properties->type = KFD_QUEUE_TYPE_COMPUTE;
+	else if (args->queue_type == KFD_IOC_QUEUE_TYPE_SDMA)
+		q_properties->type = KFD_QUEUE_TYPE_SDMA;
+	else if (args->queue_type == KFD_IOC_QUEUE_TYPE_SDMA_XGMI)
+		q_properties->type = KFD_QUEUE_TYPE_SDMA_XGMI;
+	else
+		return -ENOTSUPP;
+
+	if (args->queue_type == KFD_IOC_QUEUE_TYPE_COMPUTE_AQL)
+		q_properties->format = KFD_QUEUE_FORMAT_AQL;
+	else
+		q_properties->format = KFD_QUEUE_FORMAT_PM4;
+
+	pr_debug("Queue Percentage: %d, %d\n",
+			q_properties->queue_percent, args->queue_percentage);
+
+	pr_debug("Queue Priority: %d, %d\n",
+			q_properties->priority, args->queue_priority);
+
+	pr_debug("Queue Address: 0x%llX, 0x%llX\n",
+			q_properties->queue_address, args->ring_base_address);
+
+	pr_debug("Queue Size: 0x%llX, %u\n",
+			q_properties->queue_size, args->ring_size);
+
+	pr_debug("Queue r/w Pointers: %px, %px\n",
+			q_properties->read_ptr,
+			q_properties->write_ptr);
+
+	pr_debug("Queue Format: %d\n", q_properties->format);
+
+	pr_debug("Queue EOP: 0x%llX\n", q_properties->eop_ring_buffer_address);
+
+	pr_debug("Queue CTX save area: 0x%llX\n",
+			q_properties->ctx_save_restore_area_address);
+
+	return 0;
+}
+
+static int kfd_ioctl_create_queue(struct file *filep, struct kfd_process *p,
+					void *data)
+{
+	struct kfd_ioctl_create_queue_args *args = data;
+	struct kfd_node *dev;
+	int err = 0;
+	unsigned int queue_id;
+	struct kfd_process_device *pdd;
+	struct queue_properties q_properties;
+	uint32_t doorbell_offset_in_process = 0;
+	struct amdgpu_bo *wptr_bo = NULL;
+
+	memset(&q_properties, 0, sizeof(struct queue_properties));
+
+	pr_debug("Creating queue ioctl\n");
+
+	err = set_queue_properties_from_user(&q_properties, args);
+	if (err)
+		return err;
+
+	pr_debug("Looking for gpu id 0x%x\n", args->gpu_id);
+
+	mutex_lock(&p->mutex);
+
+	pdd = kfd_process_device_data_by_id(p, args->gpu_id);
+	if (!pdd) {
+		pr_debug("Could not find gpu id 0x%x\n", args->gpu_id);
+		err = -EINVAL;
+		goto err_pdd;
+	}
+	dev = pdd->dev;
+
+	pdd = kfd_bind_process_to_device(dev, p);
+	if (IS_ERR(pdd)) {
+		err = -ESRCH;
+		goto err_bind_process;
+	}
+
+	if (!pdd->qpd.proc_doorbells) {
+		err = kfd_alloc_process_doorbells(dev->kfd, pdd);
+		if (err) {
+			pr_debug("failed to allocate process doorbells\n");
+			goto err_bind_process;
+		}
+	}
+
+	/* Starting with GFX11, wptr BOs must be mapped to GART for MES to determine work
+	 * on unmapped queues for usermode queue oversubscription (no aggregated doorbell)
+	 */
+	if (dev->kfd->shared_resources.enable_mes &&
+			((dev->adev->mes.sched_version & AMDGPU_MES_API_VERSION_MASK)
+			>> AMDGPU_MES_API_VERSION_SHIFT) >= 2) {
+		struct amdgpu_bo_va_mapping *wptr_mapping;
+		struct amdgpu_vm *wptr_vm;
+
+		wptr_vm = drm_priv_to_vm(pdd->drm_priv);
+		err = amdgpu_bo_reserve(wptr_vm->root.bo, false);
+		if (err)
+			goto err_wptr_map_gart;
+
+		wptr_mapping = amdgpu_vm_bo_lookup_mapping(
+				wptr_vm, args->write_pointer_address >> PAGE_SHIFT);
+		amdgpu_bo_unreserve(wptr_vm->root.bo);
+		if (!wptr_mapping) {
+			pr_err("Failed to lookup wptr bo\n");
+			err = -EINVAL;
+			goto err_wptr_map_gart;
+		}
+
+		wptr_bo = wptr_mapping->bo_va->base.bo;
+		if (wptr_bo->tbo.base.size > PAGE_SIZE) {
+			pr_err("Requested GART mapping for wptr bo larger than one page\n");
+			err = -EINVAL;
+			goto err_wptr_map_gart;
+		}
+
+		err = amdgpu_amdkfd_map_gtt_bo_to_gart(dev->adev, wptr_bo);
+		if (err) {
+			pr_err("Failed to map wptr bo to GART\n");
+			goto err_wptr_map_gart;
+		}
+	}
+
+	pr_debug("Creating queue for PASID 0x%x on gpu 0x%x\n",
+			p->pasid,
+			dev->id);
+
+	err = pqm_create_queue(&p->pqm, dev, filep, &q_properties, &queue_id, wptr_bo,
+			NULL, NULL, NULL, &doorbell_offset_in_process);
+	if (err != 0)
+		goto err_create_queue;
+
+	args->queue_id = queue_id;
+
+
+	/* Return gpu_id as doorbell offset for mmap usage */
+	args->doorbell_offset = KFD_MMAP_TYPE_DOORBELL;
+	args->doorbell_offset |= KFD_MMAP_GPU_ID(args->gpu_id);
+	if (KFD_IS_SOC15(dev))
+		/* On SOC15 ASICs, include the doorbell offset within the
+		 * process doorbell frame, which is 2 pages.
+		 */
+		args->doorbell_offset |= doorbell_offset_in_process;
+
+	mutex_unlock(&p->mutex);
+
+	pr_debug("Queue id %d was created successfully\n", args->queue_id);
+
+	pr_debug("Ring buffer address == 0x%016llX\n",
+			args->ring_base_address);
+
+	pr_debug("Read ptr address    == 0x%016llX\n",
+			args->read_pointer_address);
+
+	pr_debug("Write ptr address   == 0x%016llX\n",
+			args->write_pointer_address);
+
+	kfd_dbg_ev_raise(KFD_EC_MASK(EC_QUEUE_NEW), p, dev, queue_id, false, NULL, 0);
+	return 0;
+
+err_create_queue:
+	if (wptr_bo)
+		amdgpu_amdkfd_free_gtt_mem(dev->adev, wptr_bo);
+err_wptr_map_gart:
+err_bind_process:
+err_pdd:
+	mutex_unlock(&p->mutex);
+	return err;
+}
+
+static int kfd_ioctl_destroy_queue(struct file *filp, struct kfd_process *p,
+					void *data)
+{
+	int retval;
+	struct kfd_ioctl_destroy_queue_args *args = data;
+
+	pr_debug("Destroying queue id %d for pasid 0x%x\n",
+				args->queue_id,
+				p->pasid);
+
+	mutex_lock(&p->mutex);
+
+	retval = pqm_destroy_queue(&p->pqm, args->queue_id);
+
+	mutex_unlock(&p->mutex);
+	return retval;
+}
+
+static int kfd_ioctl_update_queue(struct file *filp, struct kfd_process *p,
+					void *data)
+{
+	int retval;
+	struct kfd_ioctl_update_queue_args *args = data;
+	struct queue_properties properties;
+
+	/*
+	 * Repurpose queue percentage to accommodate new features:
+	 * bit 0-7: queue percentage
+	 * bit 8-15: pm4_target_xcc
+	 */
+	if ((args->queue_percentage & 0xFF) > KFD_MAX_QUEUE_PERCENTAGE) {
+		pr_err("Queue percentage must be between 0 to KFD_MAX_QUEUE_PERCENTAGE\n");
+		return -EINVAL;
+	}
+
+	if (args->queue_priority > KFD_MAX_QUEUE_PRIORITY) {
+		pr_err("Queue priority must be between 0 to KFD_MAX_QUEUE_PRIORITY\n");
+		return -EINVAL;
+	}
+
+	if ((args->ring_base_address) &&
+		(!access_ok((const void __user *) args->ring_base_address,
+			sizeof(uint64_t)))) {
+		pr_err("Can't access ring base address\n");
+		return -EFAULT;
+	}
+
+	if (!is_power_of_2(args->ring_size) && (args->ring_size != 0)) {
+		pr_err("Ring size must be a power of 2 or 0\n");
+		return -EINVAL;
+	}
+
+	properties.queue_address = args->ring_base_address;
+	properties.queue_size = args->ring_size;
+	properties.queue_percent = args->queue_percentage & 0xFF;
+	/* bit 8-15 are repurposed to be PM4 target XCC */
+	properties.pm4_target_xcc = (args->queue_percentage >> 8) & 0xFF;
+	properties.priority = args->queue_priority;
+
+	pr_debug("Updating queue id %d for pasid 0x%x\n",
+			args->queue_id, p->pasid);
+
+	mutex_lock(&p->mutex);
+
+	retval = pqm_update_queue_properties(&p->pqm, args->queue_id, &properties);
+
+	mutex_unlock(&p->mutex);
+
+	return retval;
+}
+
+static int kfd_ioctl_set_cu_mask(struct file *filp, struct kfd_process *p,
+					void *data)
+{
+	int retval;
+	const int max_num_cus = 1024;
+	struct kfd_ioctl_set_cu_mask_args *args = data;
+	struct mqd_update_info minfo = {0};
+	uint32_t __user *cu_mask_ptr = (uint32_t __user *)args->cu_mask_ptr;
+	size_t cu_mask_size = sizeof(uint32_t) * (args->num_cu_mask / 32);
+
+	if ((args->num_cu_mask % 32) != 0) {
+		pr_debug("num_cu_mask 0x%x must be a multiple of 32",
+				args->num_cu_mask);
+		return -EINVAL;
+	}
+
+	minfo.cu_mask.count = args->num_cu_mask;
+	if (minfo.cu_mask.count == 0) {
+		pr_debug("CU mask cannot be 0");
+		return -EINVAL;
+	}
+
+	/* To prevent an unreasonably large CU mask size, set an arbitrary
+	 * limit of max_num_cus bits.  We can then just drop any CU mask bits
+	 * past max_num_cus bits and just use the first max_num_cus bits.
+	 */
+	if (minfo.cu_mask.count > max_num_cus) {
+		pr_debug("CU mask cannot be greater than 1024 bits");
+		minfo.cu_mask.count = max_num_cus;
+		cu_mask_size = sizeof(uint32_t) * (max_num_cus/32);
+	}
+
+	minfo.cu_mask.ptr = kzalloc(cu_mask_size, GFP_KERNEL);
+	if (!minfo.cu_mask.ptr)
+		return -ENOMEM;
+
+	retval = copy_from_user(minfo.cu_mask.ptr, cu_mask_ptr, cu_mask_size);
+	if (retval) {
+		pr_debug("Could not copy CU mask from userspace");
+		retval = -EFAULT;
+		goto out;
+	}
+
+	mutex_lock(&p->mutex);
+
+	retval = pqm_update_mqd(&p->pqm, args->queue_id, &minfo);
+
+	mutex_unlock(&p->mutex);
+
+out:
+	kfree(minfo.cu_mask.ptr);
+	return retval;
+}
+
+static int kfd_ioctl_get_queue_wave_state(struct file *filep,
+					  struct kfd_process *p, void *data)
+{
+	struct kfd_ioctl_get_queue_wave_state_args *args = data;
+	int r;
+
+	mutex_lock(&p->mutex);
+
+	r = pqm_get_wave_state(&p->pqm, args->queue_id,
+			       (void __user *)args->ctl_stack_address,
+			       &args->ctl_stack_used_size,
+			       &args->save_area_used_size);
+
+	mutex_unlock(&p->mutex);
+
+	return r;
+}
+
+static int kfd_ioctl_set_memory_policy(struct file *filep,
+					struct kfd_process *p, void *data)
+{
+	struct kfd_ioctl_set_memory_policy_args *args = data;
+	int err = 0;
+	struct kfd_process_device *pdd;
+	enum cache_policy default_policy, alternate_policy;
+
+	if (args->default_policy != KFD_IOC_CACHE_POLICY_COHERENT
+	    && args->default_policy != KFD_IOC_CACHE_POLICY_NONCOHERENT) {
+		return -EINVAL;
+	}
+
+	if (args->alternate_policy != KFD_IOC_CACHE_POLICY_COHERENT
+	    && args->alternate_policy != KFD_IOC_CACHE_POLICY_NONCOHERENT) {
+		return -EINVAL;
+	}
+
+	mutex_lock(&p->mutex);
+	pdd = kfd_process_device_data_by_id(p, args->gpu_id);
+	if (!pdd) {
+		pr_debug("Could not find gpu id 0x%x\n", args->gpu_id);
+		err = -EINVAL;
+		goto err_pdd;
+	}
+
+	pdd = kfd_bind_process_to_device(pdd->dev, p);
+	if (IS_ERR(pdd)) {
+		err = -ESRCH;
+		goto out;
+	}
+
+	default_policy = (args->default_policy == KFD_IOC_CACHE_POLICY_COHERENT)
+			 ? cache_policy_coherent : cache_policy_noncoherent;
+
+	alternate_policy =
+		(args->alternate_policy == KFD_IOC_CACHE_POLICY_COHERENT)
+		   ? cache_policy_coherent : cache_policy_noncoherent;
+
+	if (!pdd->dev->dqm->ops.set_cache_memory_policy(pdd->dev->dqm,
+				&pdd->qpd,
+				default_policy,
+				alternate_policy,
+				(void __user *)args->alternate_aperture_base,
+				args->alternate_aperture_size))
+		err = -EINVAL;
+
+out:
+err_pdd:
+	mutex_unlock(&p->mutex);
+
+	return err;
+}
+
+static int kfd_ioctl_set_trap_handler(struct file *filep,
+					struct kfd_process *p, void *data)
+{
+	struct kfd_ioctl_set_trap_handler_args *args = data;
+	int err = 0;
+	struct kfd_process_device *pdd;
+
+	mutex_lock(&p->mutex);
+
+	pdd = kfd_process_device_data_by_id(p, args->gpu_id);
+	if (!pdd) {
+		err = -EINVAL;
+		goto err_pdd;
+	}
+
+	pdd = kfd_bind_process_to_device(pdd->dev, p);
+	if (IS_ERR(pdd)) {
+		err = -ESRCH;
+		goto out;
+	}
+
+	kfd_process_set_trap_handler(&pdd->qpd, args->tba_addr, args->tma_addr);
+
+out:
+err_pdd:
+	mutex_unlock(&p->mutex);
+
+	return err;
+}
+
+static int kfd_ioctl_dbg_register(struct file *filep,
+				struct kfd_process *p, void *data)
+{
+	return -EPERM;
+}
+
+static int kfd_ioctl_dbg_unregister(struct file *filep,
+				struct kfd_process *p, void *data)
+{
+	return -EPERM;
+}
+
+static int kfd_ioctl_dbg_address_watch(struct file *filep,
+					struct kfd_process *p, void *data)
+{
+	return -EPERM;
+}
+
+/* Parse and generate fixed size data structure for wave control */
+static int kfd_ioctl_dbg_wave_control(struct file *filep,
+					struct kfd_process *p, void *data)
+{
+	return -EPERM;
+}
+
+static int kfd_ioctl_get_clock_counters(struct file *filep,
+				struct kfd_process *p, void *data)
+{
+	struct kfd_ioctl_get_clock_counters_args *args = data;
+	struct kfd_process_device *pdd;
+
+	mutex_lock(&p->mutex);
+	pdd = kfd_process_device_data_by_id(p, args->gpu_id);
+	mutex_unlock(&p->mutex);
+	if (pdd)
+		/* Reading GPU clock counter from KGD */
+		args->gpu_clock_counter = amdgpu_amdkfd_get_gpu_clock_counter(pdd->dev->adev);
+	else
+		/* Node without GPU resource */
+		args->gpu_clock_counter = 0;
+
+	/* No access to rdtsc. Using raw monotonic time */
+	args->cpu_clock_counter = ktime_get_raw_ns();
+	args->system_clock_counter = ktime_get_boottime_ns();
+
+	/* Since the counter is in nano-seconds we use 1GHz frequency */
+	args->system_clock_freq = 1000000000;
+
+	return 0;
+}
+
+
+static int kfd_ioctl_get_process_apertures(struct file *filp,
+				struct kfd_process *p, void *data)
+{
+	struct kfd_ioctl_get_process_apertures_args *args = data;
+	struct kfd_process_device_apertures *pAperture;
+	int i;
+
+	dev_dbg(kfd_device, "get apertures for PASID 0x%x", p->pasid);
+
+	args->num_of_nodes = 0;
+
+	mutex_lock(&p->mutex);
+	/* Run over all pdd of the process */
+	for (i = 0; i < p->n_pdds; i++) {
+		struct kfd_process_device *pdd = p->pdds[i];
+
+		pAperture =
+			&args->process_apertures[args->num_of_nodes];
+		pAperture->gpu_id = pdd->dev->id;
+		pAperture->lds_base = pdd->lds_base;
+		pAperture->lds_limit = pdd->lds_limit;
+		pAperture->gpuvm_base = pdd->gpuvm_base;
+		pAperture->gpuvm_limit = pdd->gpuvm_limit;
+		pAperture->scratch_base = pdd->scratch_base;
+		pAperture->scratch_limit = pdd->scratch_limit;
+
+		dev_dbg(kfd_device,
+			"node id %u\n", args->num_of_nodes);
+		dev_dbg(kfd_device,
+			"gpu id %u\n", pdd->dev->id);
+		dev_dbg(kfd_device,
+			"lds_base %llX\n", pdd->lds_base);
+		dev_dbg(kfd_device,
+			"lds_limit %llX\n", pdd->lds_limit);
+		dev_dbg(kfd_device,
+			"gpuvm_base %llX\n", pdd->gpuvm_base);
+		dev_dbg(kfd_device,
+			"gpuvm_limit %llX\n", pdd->gpuvm_limit);
+		dev_dbg(kfd_device,
+			"scratch_base %llX\n", pdd->scratch_base);
+		dev_dbg(kfd_device,
+			"scratch_limit %llX\n", pdd->scratch_limit);
+
+		if (++args->num_of_nodes >= NUM_OF_SUPPORTED_GPUS)
+			break;
+	}
+	mutex_unlock(&p->mutex);
+
+	return 0;
+}
+
+static int kfd_ioctl_get_process_apertures_new(struct file *filp,
+				struct kfd_process *p, void *data)
+{
+	struct kfd_ioctl_get_process_apertures_new_args *args = data;
+	struct kfd_process_device_apertures *pa;
+	int ret;
+	int i;
+
+	dev_dbg(kfd_device, "get apertures for PASID 0x%x", p->pasid);
+
+	if (args->num_of_nodes == 0) {
+		/* Return number of nodes, so that user space can alloacate
+		 * sufficient memory
+		 */
+		mutex_lock(&p->mutex);
+		args->num_of_nodes = p->n_pdds;
+		goto out_unlock;
+	}
+
+	/* Fill in process-aperture information for all available
+	 * nodes, but not more than args->num_of_nodes as that is
+	 * the amount of memory allocated by user
+	 */
+	pa = kzalloc((sizeof(struct kfd_process_device_apertures) *
+				args->num_of_nodes), GFP_KERNEL);
+	if (!pa)
+		return -ENOMEM;
+
+	mutex_lock(&p->mutex);
+
+	if (!p->n_pdds) {
+		args->num_of_nodes = 0;
+		kfree(pa);
+		goto out_unlock;
+	}
+
+	/* Run over all pdd of the process */
+	for (i = 0; i < min(p->n_pdds, args->num_of_nodes); i++) {
+		struct kfd_process_device *pdd = p->pdds[i];
+
+		pa[i].gpu_id = pdd->dev->id;
+		pa[i].lds_base = pdd->lds_base;
+		pa[i].lds_limit = pdd->lds_limit;
+		pa[i].gpuvm_base = pdd->gpuvm_base;
+		pa[i].gpuvm_limit = pdd->gpuvm_limit;
+		pa[i].scratch_base = pdd->scratch_base;
+		pa[i].scratch_limit = pdd->scratch_limit;
+
+		dev_dbg(kfd_device,
+			"gpu id %u\n", pdd->dev->id);
+		dev_dbg(kfd_device,
+			"lds_base %llX\n", pdd->lds_base);
+		dev_dbg(kfd_device,
+			"lds_limit %llX\n", pdd->lds_limit);
+		dev_dbg(kfd_device,
+			"gpuvm_base %llX\n", pdd->gpuvm_base);
+		dev_dbg(kfd_device,
+			"gpuvm_limit %llX\n", pdd->gpuvm_limit);
+		dev_dbg(kfd_device,
+			"scratch_base %llX\n", pdd->scratch_base);
+		dev_dbg(kfd_device,
+			"scratch_limit %llX\n", pdd->scratch_limit);
+	}
+	mutex_unlock(&p->mutex);
+
+	args->num_of_nodes = i;
+	ret = copy_to_user(
+			(void __user *)args->kfd_process_device_apertures_ptr,
+			pa,
+			(i * sizeof(struct kfd_process_device_apertures)));
+	kfree(pa);
+	return ret ? -EFAULT : 0;
+
+out_unlock:
+	mutex_unlock(&p->mutex);
+	return 0;
+}
+
+static int kfd_ioctl_create_event(struct file *filp, struct kfd_process *p,
+					void *data)
+{
+	struct kfd_ioctl_create_event_args *args = data;
+	int err;
+
+	/* For dGPUs the event page is allocated in user mode. The
+	 * handle is passed to KFD with the first call to this IOCTL
+	 * through the event_page_offset field.
+	 */
+	if (args->event_page_offset) {
+		mutex_lock(&p->mutex);
+		err = kfd_kmap_event_page(p, args->event_page_offset);
+		mutex_unlock(&p->mutex);
+		if (err)
+			return err;
+	}
+
+	err = kfd_event_create(filp, p, args->event_type,
+				args->auto_reset != 0, args->node_id,
+				&args->event_id, &args->event_trigger_data,
+				&args->event_page_offset,
+				&args->event_slot_index);
+
+	pr_debug("Created event (id:0x%08x) (%s)\n", args->event_id, __func__);
+	return err;
+}
+
+static int kfd_ioctl_destroy_event(struct file *filp, struct kfd_process *p,
+					void *data)
+{
+	struct kfd_ioctl_destroy_event_args *args = data;
+
+	return kfd_event_destroy(p, args->event_id);
+}
+
+static int kfd_ioctl_set_event(struct file *filp, struct kfd_process *p,
+				void *data)
+{
+	struct kfd_ioctl_set_event_args *args = data;
+
+	return kfd_set_event(p, args->event_id);
+}
+
+static int kfd_ioctl_reset_event(struct file *filp, struct kfd_process *p,
+				void *data)
+{
+	struct kfd_ioctl_reset_event_args *args = data;
+
+	return kfd_reset_event(p, args->event_id);
+}
+
+static int kfd_ioctl_wait_events(struct file *filp, struct kfd_process *p,
+				void *data)
+{
+	struct kfd_ioctl_wait_events_args *args = data;
+
+	return kfd_wait_on_events(p, args->num_events,
+			(void __user *)args->events_ptr,
+			(args->wait_for_all != 0),
+			&args->timeout, &args->wait_result);
+}
+static int kfd_ioctl_set_scratch_backing_va(struct file *filep,
+					struct kfd_process *p, void *data)
+{
+	struct kfd_ioctl_set_scratch_backing_va_args *args = data;
+	struct kfd_process_device *pdd;
+	struct kfd_node *dev;
+	long err;
+
+	mutex_lock(&p->mutex);
+	pdd = kfd_process_device_data_by_id(p, args->gpu_id);
+	if (!pdd) {
+		err = -EINVAL;
+		goto err_pdd;
+	}
+	dev = pdd->dev;
+
+	pdd = kfd_bind_process_to_device(dev, p);
+	if (IS_ERR(pdd)) {
+		err = PTR_ERR(pdd);
+		goto bind_process_to_device_fail;
+	}
+
+	pdd->qpd.sh_hidden_private_base = args->va_addr;
+
+	mutex_unlock(&p->mutex);
+
+	if (dev->dqm->sched_policy == KFD_SCHED_POLICY_NO_HWS &&
+	    pdd->qpd.vmid != 0 && dev->kfd2kgd->set_scratch_backing_va)
+		dev->kfd2kgd->set_scratch_backing_va(
+			dev->adev, args->va_addr, pdd->qpd.vmid);
+
+	return 0;
+
+bind_process_to_device_fail:
+err_pdd:
+	mutex_unlock(&p->mutex);
+	return err;
+}
+
+static int kfd_ioctl_get_tile_config(struct file *filep,
+		struct kfd_process *p, void *data)
+{
+	struct kfd_ioctl_get_tile_config_args *args = data;
+	struct kfd_process_device *pdd;
+	struct tile_config config;
+	int err = 0;
+
+	mutex_lock(&p->mutex);
+	pdd = kfd_process_device_data_by_id(p, args->gpu_id);
+	mutex_unlock(&p->mutex);
+	if (!pdd)
+		return -EINVAL;
+
+	amdgpu_amdkfd_get_tile_config(pdd->dev->adev, &config);
+
+	args->gb_addr_config = config.gb_addr_config;
+	args->num_banks = config.num_banks;
+	args->num_ranks = config.num_ranks;
+
+	if (args->num_tile_configs > config.num_tile_configs)
+		args->num_tile_configs = config.num_tile_configs;
+	err = copy_to_user((void __user *)args->tile_config_ptr,
+			config.tile_config_ptr,
+			args->num_tile_configs * sizeof(uint32_t));
+	if (err) {
+		args->num_tile_configs = 0;
+		return -EFAULT;
+	}
+
+	if (args->num_macro_tile_configs > config.num_macro_tile_configs)
+		args->num_macro_tile_configs =
+				config.num_macro_tile_configs;
+	err = copy_to_user((void __user *)args->macro_tile_config_ptr,
+			config.macro_tile_config_ptr,
+			args->num_macro_tile_configs * sizeof(uint32_t));
+	if (err) {
+		args->num_macro_tile_configs = 0;
+		return -EFAULT;
+	}
+
+	return 0;
+}
+
+static int kfd_ioctl_acquire_vm(struct file *filep, struct kfd_process *p,
+				void *data)
+{
+	struct kfd_ioctl_acquire_vm_args *args = data;
+	struct kfd_process_device *pdd;
+	struct file *drm_file;
+	int ret;
+
+	drm_file = fget(args->drm_fd);
+	if (!drm_file)
+		return -EINVAL;
+
+	mutex_lock(&p->mutex);
+	pdd = kfd_process_device_data_by_id(p, args->gpu_id);
+	if (!pdd) {
+		ret = -EINVAL;
+		goto err_pdd;
+	}
+
+	if (pdd->drm_file) {
+		ret = pdd->drm_file == drm_file ? 0 : -EBUSY;
+		goto err_drm_file;
+	}
+
+	ret = kfd_process_device_init_vm(pdd, drm_file);
+	if (ret)
+		goto err_unlock;
+
+	/* On success, the PDD keeps the drm_file reference */
+	mutex_unlock(&p->mutex);
+
+	return 0;
+
+err_unlock:
+err_pdd:
+err_drm_file:
+	mutex_unlock(&p->mutex);
+	fput(drm_file);
+	return ret;
+}
+
+bool kfd_dev_is_large_bar(struct kfd_node *dev)
+{
+	if (debug_largebar) {
+		pr_debug("Simulate large-bar allocation on non large-bar machine\n");
+		return true;
+	}
+
+	if (dev->local_mem_info.local_mem_size_private == 0 &&
+	    dev->local_mem_info.local_mem_size_public > 0)
+		return true;
+
+	if (dev->local_mem_info.local_mem_size_public == 0 &&
+	    dev->kfd->adev->gmc.is_app_apu) {
+		pr_debug("APP APU, Consider like a large bar system\n");
+		return true;
+	}
+
+	return false;
+}
+
+static int kfd_ioctl_get_available_memory(struct file *filep,
+					  struct kfd_process *p, void *data)
+{
+	struct kfd_ioctl_get_available_memory_args *args = data;
+	struct kfd_process_device *pdd = kfd_lock_pdd_by_id(p, args->gpu_id);
+
+	if (!pdd)
+		return -EINVAL;
+	args->available = amdgpu_amdkfd_get_available_memory(pdd->dev->adev,
+							pdd->dev->node_id);
+	kfd_unlock_pdd(pdd);
+	return 0;
+}
+
+static int kfd_ioctl_alloc_memory_of_gpu(struct file *filep,
+					struct kfd_process *p, void *data)
+{
+	struct kfd_ioctl_alloc_memory_of_gpu_args *args = data;
+	struct kfd_process_device *pdd;
+	void *mem;
+	struct kfd_node *dev;
+	int idr_handle;
+	long err;
+	uint64_t offset = args->mmap_offset;
+	uint32_t flags = args->flags;
+
+	if (args->size == 0)
+		return -EINVAL;
+
+#if IS_ENABLED(CONFIG_HSA_AMD_SVM)
+	/* Flush pending deferred work to avoid racing with deferred actions
+	 * from previous memory map changes (e.g. munmap).
+	 */
+	svm_range_list_lock_and_flush_work(&p->svms, current->mm);
+	mutex_lock(&p->svms.lock);
+	mmap_write_unlock(current->mm);
+	if (interval_tree_iter_first(&p->svms.objects,
+				     args->va_addr >> PAGE_SHIFT,
+				     (args->va_addr + args->size - 1) >> PAGE_SHIFT)) {
+		pr_err("Address: 0x%llx already allocated by SVM\n",
+			args->va_addr);
+		mutex_unlock(&p->svms.lock);
+		return -EADDRINUSE;
+	}
+
+	/* When register user buffer check if it has been registered by svm by
+	 * buffer cpu virtual address.
+	 */
+	if ((flags & KFD_IOC_ALLOC_MEM_FLAGS_USERPTR) &&
+	    interval_tree_iter_first(&p->svms.objects,
+				     args->mmap_offset >> PAGE_SHIFT,
+				     (args->mmap_offset  + args->size - 1) >> PAGE_SHIFT)) {
+		pr_err("User Buffer Address: 0x%llx already allocated by SVM\n",
+			args->mmap_offset);
+		mutex_unlock(&p->svms.lock);
+		return -EADDRINUSE;
+	}
+
+	mutex_unlock(&p->svms.lock);
+#endif
+	mutex_lock(&p->mutex);
+	pdd = kfd_process_device_data_by_id(p, args->gpu_id);
+	if (!pdd) {
+		err = -EINVAL;
+		goto err_pdd;
+	}
+
+	dev = pdd->dev;
+
+	if ((flags & KFD_IOC_ALLOC_MEM_FLAGS_PUBLIC) &&
+		(flags & KFD_IOC_ALLOC_MEM_FLAGS_VRAM) &&
+		!kfd_dev_is_large_bar(dev)) {
+		pr_err("Alloc host visible vram on small bar is not allowed\n");
+		err = -EINVAL;
+		goto err_large_bar;
+	}
+
+	pdd = kfd_bind_process_to_device(dev, p);
+	if (IS_ERR(pdd)) {
+		err = PTR_ERR(pdd);
+		goto err_unlock;
+	}
+
+	if (flags & KFD_IOC_ALLOC_MEM_FLAGS_DOORBELL) {
+		if (args->size != kfd_doorbell_process_slice(dev->kfd)) {
+			err = -EINVAL;
+			goto err_unlock;
+		}
+		offset = kfd_get_process_doorbells(pdd);
+		if (!offset) {
+			err = -ENOMEM;
+			goto err_unlock;
+		}
+	} else if (flags & KFD_IOC_ALLOC_MEM_FLAGS_MMIO_REMAP) {
+		if (args->size != PAGE_SIZE) {
+			err = -EINVAL;
+			goto err_unlock;
+		}
+		offset = dev->adev->rmmio_remap.bus_addr;
+		if (!offset) {
+			err = -ENOMEM;
+			goto err_unlock;
+		}
+	}
+
+	err = amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu(
+		dev->adev, args->va_addr, args->size,
+		pdd->drm_priv, (struct kgd_mem **) &mem, &offset,
+		flags, false);
+
+	if (err)
+		goto err_unlock;
+
+	idr_handle = kfd_process_device_create_obj_handle(pdd, mem);
+	if (idr_handle < 0) {
+		err = -EFAULT;
+		goto err_free;
+	}
+
+	/* Update the VRAM usage count */
+	if (flags & KFD_IOC_ALLOC_MEM_FLAGS_VRAM) {
+		uint64_t size = args->size;
+
+		if (flags & KFD_IOC_ALLOC_MEM_FLAGS_AQL_QUEUE_MEM)
+			size >>= 1;
+		WRITE_ONCE(pdd->vram_usage, pdd->vram_usage + PAGE_ALIGN(size));
+	}
+
+	mutex_unlock(&p->mutex);
+
+	args->handle = MAKE_HANDLE(args->gpu_id, idr_handle);
+	args->mmap_offset = offset;
+
+	/* MMIO is mapped through kfd device
+	 * Generate a kfd mmap offset
+	 */
+	if (flags & KFD_IOC_ALLOC_MEM_FLAGS_MMIO_REMAP)
+		args->mmap_offset = KFD_MMAP_TYPE_MMIO
+					| KFD_MMAP_GPU_ID(args->gpu_id);
+
+	return 0;
+
+err_free:
+	amdgpu_amdkfd_gpuvm_free_memory_of_gpu(dev->adev, (struct kgd_mem *)mem,
+					       pdd->drm_priv, NULL);
+err_unlock:
+err_pdd:
+err_large_bar:
+	mutex_unlock(&p->mutex);
+	return err;
+}
+
+static int kfd_ioctl_free_memory_of_gpu(struct file *filep,
+					struct kfd_process *p, void *data)
+{
+	struct kfd_ioctl_free_memory_of_gpu_args *args = data;
+	struct kfd_process_device *pdd;
+	void *mem;
+	int ret;
+	uint64_t size = 0;
+
+	mutex_lock(&p->mutex);
+	/*
+	 * Safeguard to prevent user space from freeing signal BO.
+	 * It will be freed at process termination.
+	 */
+	if (p->signal_handle && (p->signal_handle == args->handle)) {
+		pr_err("Free signal BO is not allowed\n");
+		ret = -EPERM;
+		goto err_unlock;
+	}
+
+	pdd = kfd_process_device_data_by_id(p, GET_GPU_ID(args->handle));
+	if (!pdd) {
+		pr_err("Process device data doesn't exist\n");
+		ret = -EINVAL;
+		goto err_pdd;
+	}
+
+	mem = kfd_process_device_translate_handle(
+		pdd, GET_IDR_HANDLE(args->handle));
+	if (!mem) {
+		ret = -EINVAL;
+		goto err_unlock;
+	}
+
+	ret = amdgpu_amdkfd_gpuvm_free_memory_of_gpu(pdd->dev->adev,
+				(struct kgd_mem *)mem, pdd->drm_priv, &size);
+
+	/* If freeing the buffer failed, leave the handle in place for
+	 * clean-up during process tear-down.
+	 */
+	if (!ret)
+		kfd_process_device_remove_obj_handle(
+			pdd, GET_IDR_HANDLE(args->handle));
+
+	WRITE_ONCE(pdd->vram_usage, pdd->vram_usage - size);
+
+err_unlock:
+err_pdd:
+	mutex_unlock(&p->mutex);
+	return ret;
+}
+
+static int kfd_ioctl_map_memory_to_gpu(struct file *filep,
+					struct kfd_process *p, void *data)
+{
+	struct kfd_ioctl_map_memory_to_gpu_args *args = data;
+	struct kfd_process_device *pdd, *peer_pdd;
+	void *mem;
+	struct kfd_node *dev;
+	long err = 0;
+	int i;
+	uint32_t *devices_arr = NULL;
+
+	if (!args->n_devices) {
+		pr_debug("Device IDs array empty\n");
+		return -EINVAL;
+	}
+	if (args->n_success > args->n_devices) {
+		pr_debug("n_success exceeds n_devices\n");
+		return -EINVAL;
+	}
+
+	devices_arr = kmalloc_array(args->n_devices, sizeof(*devices_arr),
+				    GFP_KERNEL);
+	if (!devices_arr)
+		return -ENOMEM;
+
+	err = copy_from_user(devices_arr,
+			     (void __user *)args->device_ids_array_ptr,
+			     args->n_devices * sizeof(*devices_arr));
+	if (err != 0) {
+		err = -EFAULT;
+		goto copy_from_user_failed;
+	}
+
+	mutex_lock(&p->mutex);
+	pdd = kfd_process_device_data_by_id(p, GET_GPU_ID(args->handle));
+	if (!pdd) {
+		err = -EINVAL;
+		goto get_process_device_data_failed;
+	}
+	dev = pdd->dev;
+
+	pdd = kfd_bind_process_to_device(dev, p);
+	if (IS_ERR(pdd)) {
+		err = PTR_ERR(pdd);
+		goto bind_process_to_device_failed;
+	}
+
+	mem = kfd_process_device_translate_handle(pdd,
+						GET_IDR_HANDLE(args->handle));
+	if (!mem) {
+		err = -ENOMEM;
+		goto get_mem_obj_from_handle_failed;
+	}
+
+	for (i = args->n_success; i < args->n_devices; i++) {
+		peer_pdd = kfd_process_device_data_by_id(p, devices_arr[i]);
+		if (!peer_pdd) {
+			pr_debug("Getting device by id failed for 0x%x\n",
+				 devices_arr[i]);
+			err = -EINVAL;
+			goto get_mem_obj_from_handle_failed;
+		}
+
+		peer_pdd = kfd_bind_process_to_device(peer_pdd->dev, p);
+		if (IS_ERR(peer_pdd)) {
+			err = PTR_ERR(peer_pdd);
+			goto get_mem_obj_from_handle_failed;
+		}
+
+		err = amdgpu_amdkfd_gpuvm_map_memory_to_gpu(
+			peer_pdd->dev->adev, (struct kgd_mem *)mem,
+			peer_pdd->drm_priv);
+		if (err) {
+			struct pci_dev *pdev = peer_pdd->dev->adev->pdev;
+
+			dev_err(dev->adev->dev,
+			       "Failed to map peer:%04x:%02x:%02x.%d mem_domain:%d\n",
+			       pci_domain_nr(pdev->bus),
+			       pdev->bus->number,
+			       PCI_SLOT(pdev->devfn),
+			       PCI_FUNC(pdev->devfn),
+			       ((struct kgd_mem *)mem)->domain);
+			goto map_memory_to_gpu_failed;
+		}
+		args->n_success = i+1;
+	}
+
+	err = amdgpu_amdkfd_gpuvm_sync_memory(dev->adev, (struct kgd_mem *) mem, true);
+	if (err) {
+		pr_debug("Sync memory failed, wait interrupted by user signal\n");
+		goto sync_memory_failed;
+	}
+
+	mutex_unlock(&p->mutex);
+
+	/* Flush TLBs after waiting for the page table updates to complete */
+	for (i = 0; i < args->n_devices; i++) {
+		peer_pdd = kfd_process_device_data_by_id(p, devices_arr[i]);
+		if (WARN_ON_ONCE(!peer_pdd))
+			continue;
+		kfd_flush_tlb(peer_pdd, TLB_FLUSH_LEGACY);
+	}
+	kfree(devices_arr);
+
+	return err;
+
+get_process_device_data_failed:
+bind_process_to_device_failed:
+get_mem_obj_from_handle_failed:
+map_memory_to_gpu_failed:
+sync_memory_failed:
+	mutex_unlock(&p->mutex);
+copy_from_user_failed:
+	kfree(devices_arr);
+
+	return err;
+}
+
+static int kfd_ioctl_unmap_memory_from_gpu(struct file *filep,
+					struct kfd_process *p, void *data)
+{
+	struct kfd_ioctl_unmap_memory_from_gpu_args *args = data;
+	struct kfd_process_device *pdd, *peer_pdd;
+	void *mem;
+	long err = 0;
+	uint32_t *devices_arr = NULL, i;
+	bool flush_tlb;
+
+	if (!args->n_devices) {
+		pr_debug("Device IDs array empty\n");
+		return -EINVAL;
+	}
+	if (args->n_success > args->n_devices) {
+		pr_debug("n_success exceeds n_devices\n");
+		return -EINVAL;
+	}
+
+	devices_arr = kmalloc_array(args->n_devices, sizeof(*devices_arr),
+				    GFP_KERNEL);
+	if (!devices_arr)
+		return -ENOMEM;
+
+	err = copy_from_user(devices_arr,
+			     (void __user *)args->device_ids_array_ptr,
+			     args->n_devices * sizeof(*devices_arr));
+	if (err != 0) {
+		err = -EFAULT;
+		goto copy_from_user_failed;
+	}
+
+	mutex_lock(&p->mutex);
+	pdd = kfd_process_device_data_by_id(p, GET_GPU_ID(args->handle));
+	if (!pdd) {
+		err = -EINVAL;
+		goto bind_process_to_device_failed;
+	}
+
+	mem = kfd_process_device_translate_handle(pdd,
+						GET_IDR_HANDLE(args->handle));
+	if (!mem) {
+		err = -ENOMEM;
+		goto get_mem_obj_from_handle_failed;
+	}
+
+	for (i = args->n_success; i < args->n_devices; i++) {
+		peer_pdd = kfd_process_device_data_by_id(p, devices_arr[i]);
+		if (!peer_pdd) {
+			err = -EINVAL;
+			goto get_mem_obj_from_handle_failed;
+		}
+		err = amdgpu_amdkfd_gpuvm_unmap_memory_from_gpu(
+			peer_pdd->dev->adev, (struct kgd_mem *)mem, peer_pdd->drm_priv);
+		if (err) {
+			pr_err("Failed to unmap from gpu %d/%d\n",
+			       i, args->n_devices);
+			goto unmap_memory_from_gpu_failed;
+		}
+		args->n_success = i+1;
+	}
+
+	flush_tlb = kfd_flush_tlb_after_unmap(pdd->dev->kfd);
+	if (flush_tlb) {
+		err = amdgpu_amdkfd_gpuvm_sync_memory(pdd->dev->adev,
+				(struct kgd_mem *) mem, true);
+		if (err) {
+			pr_debug("Sync memory failed, wait interrupted by user signal\n");
+			goto sync_memory_failed;
+		}
+	}
+	mutex_unlock(&p->mutex);
+
+	if (flush_tlb) {
+		/* Flush TLBs after waiting for the page table updates to complete */
+		for (i = 0; i < args->n_devices; i++) {
+			peer_pdd = kfd_process_device_data_by_id(p, devices_arr[i]);
+			if (WARN_ON_ONCE(!peer_pdd))
+				continue;
+			kfd_flush_tlb(peer_pdd, TLB_FLUSH_HEAVYWEIGHT);
+		}
+	}
+	kfree(devices_arr);
+
+	return 0;
+
+bind_process_to_device_failed:
+get_mem_obj_from_handle_failed:
+unmap_memory_from_gpu_failed:
+sync_memory_failed:
+	mutex_unlock(&p->mutex);
+copy_from_user_failed:
+	kfree(devices_arr);
+	return err;
+}
+
+static int kfd_ioctl_alloc_queue_gws(struct file *filep,
+		struct kfd_process *p, void *data)
+{
+	int retval;
+	struct kfd_ioctl_alloc_queue_gws_args *args = data;
+	struct queue *q;
+	struct kfd_node *dev;
+
+	mutex_lock(&p->mutex);
+	q = pqm_get_user_queue(&p->pqm, args->queue_id);
+
+	if (q) {
+		dev = q->device;
+	} else {
+		retval = -EINVAL;
+		goto out_unlock;
+	}
+
+	if (!dev->gws) {
+		retval = -ENODEV;
+		goto out_unlock;
+	}
+
+	if (dev->dqm->sched_policy == KFD_SCHED_POLICY_NO_HWS) {
+		retval = -ENODEV;
+		goto out_unlock;
+	}
+
+	if (p->debug_trap_enabled && (!kfd_dbg_has_gws_support(dev) ||
+				      kfd_dbg_has_cwsr_workaround(dev))) {
+		retval = -EBUSY;
+		goto out_unlock;
+	}
+
+	retval = pqm_set_gws(&p->pqm, args->queue_id, args->num_gws ? dev->gws : NULL);
+	mutex_unlock(&p->mutex);
+
+	args->first_gws = 0;
+	return retval;
+
+out_unlock:
+	mutex_unlock(&p->mutex);
+	return retval;
+}
+
+static int kfd_ioctl_get_dmabuf_info(struct file *filep,
+		struct kfd_process *p, void *data)
+{
+	struct kfd_ioctl_get_dmabuf_info_args *args = data;
+	struct kfd_node *dev = NULL;
+	struct amdgpu_device *dmabuf_adev;
+	void *metadata_buffer = NULL;
+	uint32_t flags;
+	int8_t xcp_id;
+	unsigned int i;
+	int r;
+
+	/* Find a KFD GPU device that supports the get_dmabuf_info query */
+	for (i = 0; kfd_topology_enum_kfd_devices(i, &dev) == 0; i++)
+		if (dev)
+			break;
+	if (!dev)
+		return -EINVAL;
+
+	if (args->metadata_ptr) {
+		metadata_buffer = kzalloc(args->metadata_size, GFP_KERNEL);
+		if (!metadata_buffer)
+			return -ENOMEM;
+	}
+
+	/* Get dmabuf info from KGD */
+	r = amdgpu_amdkfd_get_dmabuf_info(dev->adev, args->dmabuf_fd,
+					  &dmabuf_adev, &args->size,
+					  metadata_buffer, args->metadata_size,
+					  &args->metadata_size, &flags, &xcp_id);
+	if (r)
+		goto exit;
+
+	if (xcp_id >= 0)
+		args->gpu_id = dmabuf_adev->kfd.dev->nodes[xcp_id]->id;
+	else
+		args->gpu_id = dmabuf_adev->kfd.dev->nodes[0]->id;
+	args->flags = flags;
+
+	/* Copy metadata buffer to user mode */
+	if (metadata_buffer) {
+		r = copy_to_user((void __user *)args->metadata_ptr,
+				 metadata_buffer, args->metadata_size);
+		if (r != 0)
+			r = -EFAULT;
+	}
+
+exit:
+	kfree(metadata_buffer);
+
+	return r;
+}
+
+static int kfd_ioctl_import_dmabuf(struct file *filep,
+				   struct kfd_process *p, void *data)
+{
+	struct kfd_ioctl_import_dmabuf_args *args = data;
+	struct kfd_process_device *pdd;
+	struct dma_buf *dmabuf;
+	int idr_handle;
+	uint64_t size;
+	void *mem;
+	int r;
+
+	dmabuf = dma_buf_get(args->dmabuf_fd);
+	if (IS_ERR(dmabuf))
+		return PTR_ERR(dmabuf);
+
+	mutex_lock(&p->mutex);
+	pdd = kfd_process_device_data_by_id(p, args->gpu_id);
+	if (!pdd) {
+		r = -EINVAL;
+		goto err_unlock;
+	}
+
+	pdd = kfd_bind_process_to_device(pdd->dev, p);
+	if (IS_ERR(pdd)) {
+		r = PTR_ERR(pdd);
+		goto err_unlock;
+	}
+
+	r = amdgpu_amdkfd_gpuvm_import_dmabuf(pdd->dev->adev, dmabuf,
+					      args->va_addr, pdd->drm_priv,
+					      (struct kgd_mem **)&mem, &size,
+					      NULL);
+	if (r)
+		goto err_unlock;
+
+	idr_handle = kfd_process_device_create_obj_handle(pdd, mem);
+	if (idr_handle < 0) {
+		r = -EFAULT;
+		goto err_free;
+	}
+
+	mutex_unlock(&p->mutex);
+	dma_buf_put(dmabuf);
+
+	args->handle = MAKE_HANDLE(args->gpu_id, idr_handle);
+
+	return 0;
+
+err_free:
+	amdgpu_amdkfd_gpuvm_free_memory_of_gpu(pdd->dev->adev, (struct kgd_mem *)mem,
+					       pdd->drm_priv, NULL);
+err_unlock:
+	mutex_unlock(&p->mutex);
+	dma_buf_put(dmabuf);
+	return r;
+}
+
+static int kfd_ioctl_export_dmabuf(struct file *filep,
+				   struct kfd_process *p, void *data)
+{
+	struct kfd_ioctl_export_dmabuf_args *args = data;
+	struct kfd_process_device *pdd;
+	struct dma_buf *dmabuf;
+	struct kfd_node *dev;
+	void *mem;
+	int ret = 0;
+
+	dev = kfd_device_by_id(GET_GPU_ID(args->handle));
+	if (!dev)
+		return -EINVAL;
+
+	mutex_lock(&p->mutex);
+
+	pdd = kfd_get_process_device_data(dev, p);
+	if (!pdd) {
+		ret = -EINVAL;
+		goto err_unlock;
+	}
+
+	mem = kfd_process_device_translate_handle(pdd,
+						GET_IDR_HANDLE(args->handle));
+	if (!mem) {
+		ret = -EINVAL;
+		goto err_unlock;
+	}
+
+	ret = amdgpu_amdkfd_gpuvm_export_dmabuf(mem, &dmabuf);
+	mutex_unlock(&p->mutex);
+	if (ret)
+		goto err_out;
+
+	ret = dma_buf_fd(dmabuf, args->flags);
+	if (ret < 0) {
+		dma_buf_put(dmabuf);
+		goto err_out;
+	}
+	/* dma_buf_fd assigns the reference count to the fd, no need to
+	 * put the reference here.
+	 */
+	args->dmabuf_fd = ret;
+
+	return 0;
+
+err_unlock:
+	mutex_unlock(&p->mutex);
+err_out:
+	return ret;
+}
+
+/* Handle requests for watching SMI events */
+static int kfd_ioctl_smi_events(struct file *filep,
+				struct kfd_process *p, void *data)
+{
+	struct kfd_ioctl_smi_events_args *args = data;
+	struct kfd_process_device *pdd;
+
+	mutex_lock(&p->mutex);
+
+	pdd = kfd_process_device_data_by_id(p, args->gpuid);
+	mutex_unlock(&p->mutex);
+	if (!pdd)
+		return -EINVAL;
+
+	return kfd_smi_event_open(pdd->dev, &args->anon_fd);
+}
+
+#if IS_ENABLED(CONFIG_HSA_AMD_SVM)
+
+static int kfd_ioctl_set_xnack_mode(struct file *filep,
+				    struct kfd_process *p, void *data)
+{
+	struct kfd_ioctl_set_xnack_mode_args *args = data;
+	int r = 0;
+
+	mutex_lock(&p->mutex);
+	if (args->xnack_enabled >= 0) {
+		if (!list_empty(&p->pqm.queues)) {
+			pr_debug("Process has user queues running\n");
+			r = -EBUSY;
+			goto out_unlock;
+		}
+
+		if (p->xnack_enabled == args->xnack_enabled)
+			goto out_unlock;
+
+		if (args->xnack_enabled && !kfd_process_xnack_mode(p, true)) {
+			r = -EPERM;
+			goto out_unlock;
+		}
+
+		r = svm_range_switch_xnack_reserve_mem(p, args->xnack_enabled);
+	} else {
+		args->xnack_enabled = p->xnack_enabled;
+	}
+
+out_unlock:
+	mutex_unlock(&p->mutex);
+
+	return r;
+}
+
+static int kfd_ioctl_svm(struct file *filep, struct kfd_process *p, void *data)
+{
+	struct kfd_ioctl_svm_args *args = data;
+	int r = 0;
+
+	pr_debug("start 0x%llx size 0x%llx op 0x%x nattr 0x%x\n",
+		 args->start_addr, args->size, args->op, args->nattr);
+
+	if ((args->start_addr & ~PAGE_MASK) || (args->size & ~PAGE_MASK))
+		return -EINVAL;
+	if (!args->start_addr || !args->size)
+		return -EINVAL;
+
+	r = svm_ioctl(p, args->op, args->start_addr, args->size, args->nattr,
+		      args->attrs);
+
+	return r;
+}
+#else
+static int kfd_ioctl_set_xnack_mode(struct file *filep,
+				    struct kfd_process *p, void *data)
+{
+	return -EPERM;
+}
+static int kfd_ioctl_svm(struct file *filep, struct kfd_process *p, void *data)
+{
+	return -EPERM;
+}
+#endif
+
+static int criu_checkpoint_process(struct kfd_process *p,
+			     uint8_t __user *user_priv_data,
+			     uint64_t *priv_offset)
+{
+	struct kfd_criu_process_priv_data process_priv;
+	int ret;
+
+	memset(&process_priv, 0, sizeof(process_priv));
+
+	process_priv.version = KFD_CRIU_PRIV_VERSION;
+	/* For CR, we don't consider negative xnack mode which is used for
+	 * querying without changing it, here 0 simply means disabled and 1
+	 * means enabled so retry for finding a valid PTE.
+	 */
+	process_priv.xnack_mode = p->xnack_enabled ? 1 : 0;
+
+	ret = copy_to_user(user_priv_data + *priv_offset,
+				&process_priv, sizeof(process_priv));
+
+	if (ret) {
+		pr_err("Failed to copy process information to user\n");
+		ret = -EFAULT;
+	}
+
+	*priv_offset += sizeof(process_priv);
+	return ret;
+}
+
+static int criu_checkpoint_devices(struct kfd_process *p,
+			     uint32_t num_devices,
+			     uint8_t __user *user_addr,
+			     uint8_t __user *user_priv_data,
+			     uint64_t *priv_offset)
+{
+	struct kfd_criu_device_priv_data *device_priv = NULL;
+	struct kfd_criu_device_bucket *device_buckets = NULL;
+	int ret = 0, i;
+
+	device_buckets = kvzalloc(num_devices * sizeof(*device_buckets), GFP_KERNEL);
+	if (!device_buckets) {
+		ret = -ENOMEM;
+		goto exit;
+	}
+
+	device_priv = kvzalloc(num_devices * sizeof(*device_priv), GFP_KERNEL);
+	if (!device_priv) {
+		ret = -ENOMEM;
+		goto exit;
+	}
+
+	for (i = 0; i < num_devices; i++) {
+		struct kfd_process_device *pdd = p->pdds[i];
+
+		device_buckets[i].user_gpu_id = pdd->user_gpu_id;
+		device_buckets[i].actual_gpu_id = pdd->dev->id;
+
+		/*
+		 * priv_data does not contain useful information for now and is reserved for
+		 * future use, so we do not set its contents.
+		 */
+	}
+
+	ret = copy_to_user(user_addr, device_buckets, num_devices * sizeof(*device_buckets));
+	if (ret) {
+		pr_err("Failed to copy device information to user\n");
+		ret = -EFAULT;
+		goto exit;
+	}
+
+	ret = copy_to_user(user_priv_data + *priv_offset,
+			   device_priv,
+			   num_devices * sizeof(*device_priv));
+	if (ret) {
+		pr_err("Failed to copy device information to user\n");
+		ret = -EFAULT;
+	}
+	*priv_offset += num_devices * sizeof(*device_priv);
+
+exit:
+	kvfree(device_buckets);
+	kvfree(device_priv);
+	return ret;
+}
+
+static uint32_t get_process_num_bos(struct kfd_process *p)
+{
+	uint32_t num_of_bos = 0;
+	int i;
+
+	/* Run over all PDDs of the process */
+	for (i = 0; i < p->n_pdds; i++) {
+		struct kfd_process_device *pdd = p->pdds[i];
+		void *mem;
+		int id;
+
+		idr_for_each_entry(&pdd->alloc_idr, mem, id) {
+			struct kgd_mem *kgd_mem = (struct kgd_mem *)mem;
+
+			if (!kgd_mem->va || kgd_mem->va > pdd->gpuvm_base)
+				num_of_bos++;
+		}
+	}
+	return num_of_bos;
+}
+
+static int criu_get_prime_handle(struct kgd_mem *mem, int flags,
+				      u32 *shared_fd)
+{
+	struct dma_buf *dmabuf;
+	int ret;
+
+	ret = amdgpu_amdkfd_gpuvm_export_dmabuf(mem, &dmabuf);
+	if (ret) {
+		pr_err("dmabuf export failed for the BO\n");
+		return ret;
+	}
+
+	ret = dma_buf_fd(dmabuf, flags);
+	if (ret < 0) {
+		pr_err("dmabuf create fd failed, ret:%d\n", ret);
+		goto out_free_dmabuf;
+	}
+
+	*shared_fd = ret;
+	return 0;
+
+out_free_dmabuf:
+	dma_buf_put(dmabuf);
+	return ret;
+}
+
+static int criu_checkpoint_bos(struct kfd_process *p,
+			       uint32_t num_bos,
+			       uint8_t __user *user_bos,
+			       uint8_t __user *user_priv_data,
+			       uint64_t *priv_offset)
+{
+	struct kfd_criu_bo_bucket *bo_buckets;
+	struct kfd_criu_bo_priv_data *bo_privs;
+	int ret = 0, pdd_index, bo_index = 0, id;
+	void *mem;
+
+	bo_buckets = kvzalloc(num_bos * sizeof(*bo_buckets), GFP_KERNEL);
+	if (!bo_buckets)
+		return -ENOMEM;
+
+	bo_privs = kvzalloc(num_bos * sizeof(*bo_privs), GFP_KERNEL);
+	if (!bo_privs) {
+		ret = -ENOMEM;
+		goto exit;
+	}
+
+	for (pdd_index = 0; pdd_index < p->n_pdds; pdd_index++) {
+		struct kfd_process_device *pdd = p->pdds[pdd_index];
+		struct amdgpu_bo *dumper_bo;
+		struct kgd_mem *kgd_mem;
+
+		idr_for_each_entry(&pdd->alloc_idr, mem, id) {
+			struct kfd_criu_bo_bucket *bo_bucket;
+			struct kfd_criu_bo_priv_data *bo_priv;
+			int i, dev_idx = 0;
+
+			if (!mem) {
+				ret = -ENOMEM;
+				goto exit;
+			}
+
+			kgd_mem = (struct kgd_mem *)mem;
+			dumper_bo = kgd_mem->bo;
+
+			/* Skip checkpointing BOs that are used for Trap handler
+			 * code and state. Currently, these BOs have a VA that
+			 * is less GPUVM Base
+			 */
+			if (kgd_mem->va && kgd_mem->va <= pdd->gpuvm_base)
+				continue;
+
+			bo_bucket = &bo_buckets[bo_index];
+			bo_priv = &bo_privs[bo_index];
+
+			bo_bucket->gpu_id = pdd->user_gpu_id;
+			bo_bucket->addr = (uint64_t)kgd_mem->va;
+			bo_bucket->size = amdgpu_bo_size(dumper_bo);
+			bo_bucket->alloc_flags = (uint32_t)kgd_mem->alloc_flags;
+			bo_priv->idr_handle = id;
+
+			if (bo_bucket->alloc_flags & KFD_IOC_ALLOC_MEM_FLAGS_USERPTR) {
+				ret = amdgpu_ttm_tt_get_userptr(&dumper_bo->tbo,
+								&bo_priv->user_addr);
+				if (ret) {
+					pr_err("Failed to obtain user address for user-pointer bo\n");
+					goto exit;
+				}
+			}
+			if (bo_bucket->alloc_flags
+			    & (KFD_IOC_ALLOC_MEM_FLAGS_VRAM | KFD_IOC_ALLOC_MEM_FLAGS_GTT)) {
+				ret = criu_get_prime_handle(kgd_mem,
+						bo_bucket->alloc_flags &
+						KFD_IOC_ALLOC_MEM_FLAGS_WRITABLE ? DRM_RDWR : 0,
+						&bo_bucket->dmabuf_fd);
+				if (ret)
+					goto exit;
+			} else {
+				bo_bucket->dmabuf_fd = KFD_INVALID_FD;
+			}
+
+			if (bo_bucket->alloc_flags & KFD_IOC_ALLOC_MEM_FLAGS_DOORBELL)
+				bo_bucket->offset = KFD_MMAP_TYPE_DOORBELL |
+					KFD_MMAP_GPU_ID(pdd->dev->id);
+			else if (bo_bucket->alloc_flags &
+				KFD_IOC_ALLOC_MEM_FLAGS_MMIO_REMAP)
+				bo_bucket->offset = KFD_MMAP_TYPE_MMIO |
+					KFD_MMAP_GPU_ID(pdd->dev->id);
+			else
+				bo_bucket->offset = amdgpu_bo_mmap_offset(dumper_bo);
+
+			for (i = 0; i < p->n_pdds; i++) {
+				if (amdgpu_amdkfd_bo_mapped_to_dev(p->pdds[i]->dev->adev, kgd_mem))
+					bo_priv->mapped_gpuids[dev_idx++] = p->pdds[i]->user_gpu_id;
+			}
+
+			pr_debug("bo_size = 0x%llx, bo_addr = 0x%llx bo_offset = 0x%llx\n"
+					"gpu_id = 0x%x alloc_flags = 0x%x idr_handle = 0x%x",
+					bo_bucket->size,
+					bo_bucket->addr,
+					bo_bucket->offset,
+					bo_bucket->gpu_id,
+					bo_bucket->alloc_flags,
+					bo_priv->idr_handle);
+			bo_index++;
+		}
+	}
+
+	ret = copy_to_user(user_bos, bo_buckets, num_bos * sizeof(*bo_buckets));
+	if (ret) {
+		pr_err("Failed to copy BO information to user\n");
+		ret = -EFAULT;
+		goto exit;
+	}
+
+	ret = copy_to_user(user_priv_data + *priv_offset, bo_privs, num_bos * sizeof(*bo_privs));
+	if (ret) {
+		pr_err("Failed to copy BO priv information to user\n");
+		ret = -EFAULT;
+		goto exit;
+	}
+
+	*priv_offset += num_bos * sizeof(*bo_privs);
+
+exit:
+	while (ret && bo_index--) {
+		if (bo_buckets[bo_index].alloc_flags
+		    & (KFD_IOC_ALLOC_MEM_FLAGS_VRAM | KFD_IOC_ALLOC_MEM_FLAGS_GTT))
+			close_fd(bo_buckets[bo_index].dmabuf_fd);
+	}
+
+	kvfree(bo_buckets);
+	kvfree(bo_privs);
+	return ret;
+}
+
+static int criu_get_process_object_info(struct kfd_process *p,
+					uint32_t *num_devices,
+					uint32_t *num_bos,
+					uint32_t *num_objects,
+					uint64_t *objs_priv_size)
+{
+	uint64_t queues_priv_data_size, svm_priv_data_size, priv_size;
+	uint32_t num_queues, num_events, num_svm_ranges;
+	int ret;
+
+	*num_devices = p->n_pdds;
+	*num_bos = get_process_num_bos(p);
+
+	ret = kfd_process_get_queue_info(p, &num_queues, &queues_priv_data_size);
+	if (ret)
+		return ret;
+
+	num_events = kfd_get_num_events(p);
+
+	ret = svm_range_get_info(p, &num_svm_ranges, &svm_priv_data_size);
+	if (ret)
+		return ret;
+
+	*num_objects = num_queues + num_events + num_svm_ranges;
+
+	if (objs_priv_size) {
+		priv_size = sizeof(struct kfd_criu_process_priv_data);
+		priv_size += *num_devices * sizeof(struct kfd_criu_device_priv_data);
+		priv_size += *num_bos * sizeof(struct kfd_criu_bo_priv_data);
+		priv_size += queues_priv_data_size;
+		priv_size += num_events * sizeof(struct kfd_criu_event_priv_data);
+		priv_size += svm_priv_data_size;
+		*objs_priv_size = priv_size;
+	}
+	return 0;
+}
+
+static int criu_checkpoint(struct file *filep,
+			   struct kfd_process *p,
+			   struct kfd_ioctl_criu_args *args)
+{
+	int ret;
+	uint32_t num_devices, num_bos, num_objects;
+	uint64_t priv_size, priv_offset = 0, bo_priv_offset;
+
+	if (!args->devices || !args->bos || !args->priv_data)
+		return -EINVAL;
+
+	mutex_lock(&p->mutex);
+
+	if (!p->n_pdds) {
+		pr_err("No pdd for given process\n");
+		ret = -ENODEV;
+		goto exit_unlock;
+	}
+
+	/* Confirm all process queues are evicted */
+	if (!p->queues_paused) {
+		pr_err("Cannot dump process when queues are not in evicted state\n");
+		/* CRIU plugin did not call op PROCESS_INFO before checkpointing */
+		ret = -EINVAL;
+		goto exit_unlock;
+	}
+
+	ret = criu_get_process_object_info(p, &num_devices, &num_bos, &num_objects, &priv_size);
+	if (ret)
+		goto exit_unlock;
+
+	if (num_devices != args->num_devices ||
+	    num_bos != args->num_bos ||
+	    num_objects != args->num_objects ||
+	    priv_size != args->priv_data_size) {
+
+		ret = -EINVAL;
+		goto exit_unlock;
+	}
+
+	/* each function will store private data inside priv_data and adjust priv_offset */
+	ret = criu_checkpoint_process(p, (uint8_t __user *)args->priv_data, &priv_offset);
+	if (ret)
+		goto exit_unlock;
+
+	ret = criu_checkpoint_devices(p, num_devices, (uint8_t __user *)args->devices,
+				(uint8_t __user *)args->priv_data, &priv_offset);
+	if (ret)
+		goto exit_unlock;
+
+	/* Leave room for BOs in the private data. They need to be restored
+	 * before events, but we checkpoint them last to simplify the error
+	 * handling.
+	 */
+	bo_priv_offset = priv_offset;
+	priv_offset += num_bos * sizeof(struct kfd_criu_bo_priv_data);
+
+	if (num_objects) {
+		ret = kfd_criu_checkpoint_queues(p, (uint8_t __user *)args->priv_data,
+						 &priv_offset);
+		if (ret)
+			goto exit_unlock;
+
+		ret = kfd_criu_checkpoint_events(p, (uint8_t __user *)args->priv_data,
+						 &priv_offset);
+		if (ret)
+			goto exit_unlock;
+
+		ret = kfd_criu_checkpoint_svm(p, (uint8_t __user *)args->priv_data, &priv_offset);
+		if (ret)
+			goto exit_unlock;
+	}
+
+	/* This must be the last thing in this function that can fail.
+	 * Otherwise we leak dmabuf file descriptors.
+	 */
+	ret = criu_checkpoint_bos(p, num_bos, (uint8_t __user *)args->bos,
+			   (uint8_t __user *)args->priv_data, &bo_priv_offset);
+
+exit_unlock:
+	mutex_unlock(&p->mutex);
+	if (ret)
+		pr_err("Failed to dump CRIU ret:%d\n", ret);
+	else
+		pr_debug("CRIU dump ret:%d\n", ret);
+
+	return ret;
+}
+
+static int criu_restore_process(struct kfd_process *p,
+				struct kfd_ioctl_criu_args *args,
+				uint64_t *priv_offset,
+				uint64_t max_priv_data_size)
+{
+	int ret = 0;
+	struct kfd_criu_process_priv_data process_priv;
+
+	if (*priv_offset + sizeof(process_priv) > max_priv_data_size)
+		return -EINVAL;
+
+	ret = copy_from_user(&process_priv,
+				(void __user *)(args->priv_data + *priv_offset),
+				sizeof(process_priv));
+	if (ret) {
+		pr_err("Failed to copy process private information from user\n");
+		ret = -EFAULT;
+		goto exit;
+	}
+	*priv_offset += sizeof(process_priv);
+
+	if (process_priv.version != KFD_CRIU_PRIV_VERSION) {
+		pr_err("Invalid CRIU API version (checkpointed:%d current:%d)\n",
+			process_priv.version, KFD_CRIU_PRIV_VERSION);
+		return -EINVAL;
+	}
+
+	pr_debug("Setting XNACK mode\n");
+	if (process_priv.xnack_mode && !kfd_process_xnack_mode(p, true)) {
+		pr_err("xnack mode cannot be set\n");
+		ret = -EPERM;
+		goto exit;
+	} else {
+		pr_debug("set xnack mode: %d\n", process_priv.xnack_mode);
+		p->xnack_enabled = process_priv.xnack_mode;
+	}
+
+exit:
+	return ret;
+}
+
+static int criu_restore_devices(struct kfd_process *p,
+				struct kfd_ioctl_criu_args *args,
+				uint64_t *priv_offset,
+				uint64_t max_priv_data_size)
+{
+	struct kfd_criu_device_bucket *device_buckets;
+	struct kfd_criu_device_priv_data *device_privs;
+	int ret = 0;
+	uint32_t i;
+
+	if (args->num_devices != p->n_pdds)
+		return -EINVAL;
+
+	if (*priv_offset + (args->num_devices * sizeof(*device_privs)) > max_priv_data_size)
+		return -EINVAL;
+
+	device_buckets = kmalloc_array(args->num_devices, sizeof(*device_buckets), GFP_KERNEL);
+	if (!device_buckets)
+		return -ENOMEM;
+
+	ret = copy_from_user(device_buckets, (void __user *)args->devices,
+				args->num_devices * sizeof(*device_buckets));
+	if (ret) {
+		pr_err("Failed to copy devices buckets from user\n");
+		ret = -EFAULT;
+		goto exit;
+	}
+
+	for (i = 0; i < args->num_devices; i++) {
+		struct kfd_node *dev;
+		struct kfd_process_device *pdd;
+		struct file *drm_file;
+
+		/* device private data is not currently used */
+
+		if (!device_buckets[i].user_gpu_id) {
+			pr_err("Invalid user gpu_id\n");
+			ret = -EINVAL;
+			goto exit;
+		}
+
+		dev = kfd_device_by_id(device_buckets[i].actual_gpu_id);
+		if (!dev) {
+			pr_err("Failed to find device with gpu_id = %x\n",
+				device_buckets[i].actual_gpu_id);
+			ret = -EINVAL;
+			goto exit;
+		}
+
+		pdd = kfd_get_process_device_data(dev, p);
+		if (!pdd) {
+			pr_err("Failed to get pdd for gpu_id = %x\n",
+					device_buckets[i].actual_gpu_id);
+			ret = -EINVAL;
+			goto exit;
+		}
+		pdd->user_gpu_id = device_buckets[i].user_gpu_id;
+
+		drm_file = fget(device_buckets[i].drm_fd);
+		if (!drm_file) {
+			pr_err("Invalid render node file descriptor sent from plugin (%d)\n",
+				device_buckets[i].drm_fd);
+			ret = -EINVAL;
+			goto exit;
+		}
+
+		if (pdd->drm_file) {
+			ret = -EINVAL;
+			goto exit;
+		}
+
+		/* create the vm using render nodes for kfd pdd */
+		if (kfd_process_device_init_vm(pdd, drm_file)) {
+			pr_err("could not init vm for given pdd\n");
+			/* On success, the PDD keeps the drm_file reference */
+			fput(drm_file);
+			ret = -EINVAL;
+			goto exit;
+		}
+		/*
+		 * pdd now already has the vm bound to render node so below api won't create a new
+		 * exclusive kfd mapping but use existing one with renderDXXX but is still needed
+		 * for iommu v2 binding  and runtime pm.
+		 */
+		pdd = kfd_bind_process_to_device(dev, p);
+		if (IS_ERR(pdd)) {
+			ret = PTR_ERR(pdd);
+			goto exit;
+		}
+
+		if (!pdd->qpd.proc_doorbells) {
+			ret = kfd_alloc_process_doorbells(dev->kfd, pdd);
+			if (ret)
+				goto exit;
+		}
+	}
+
+	/*
+	 * We are not copying device private data from user as we are not using the data for now,
+	 * but we still adjust for its private data.
+	 */
+	*priv_offset += args->num_devices * sizeof(*device_privs);
+
+exit:
+	kfree(device_buckets);
+	return ret;
+}
+
+static int criu_restore_memory_of_gpu(struct kfd_process_device *pdd,
+				      struct kfd_criu_bo_bucket *bo_bucket,
+				      struct kfd_criu_bo_priv_data *bo_priv,
+				      struct kgd_mem **kgd_mem)
+{
+	int idr_handle;
+	int ret;
+	const bool criu_resume = true;
+	u64 offset;
+
+	if (bo_bucket->alloc_flags & KFD_IOC_ALLOC_MEM_FLAGS_DOORBELL) {
+		if (bo_bucket->size !=
+				kfd_doorbell_process_slice(pdd->dev->kfd))
+			return -EINVAL;
+
+		offset = kfd_get_process_doorbells(pdd);
+		if (!offset)
+			return -ENOMEM;
+	} else if (bo_bucket->alloc_flags & KFD_IOC_ALLOC_MEM_FLAGS_MMIO_REMAP) {
+		/* MMIO BOs need remapped bus address */
+		if (bo_bucket->size != PAGE_SIZE) {
+			pr_err("Invalid page size\n");
+			return -EINVAL;
+		}
+		offset = pdd->dev->adev->rmmio_remap.bus_addr;
+		if (!offset) {
+			pr_err("amdgpu_amdkfd_get_mmio_remap_phys_addr failed\n");
+			return -ENOMEM;
+		}
+	} else if (bo_bucket->alloc_flags & KFD_IOC_ALLOC_MEM_FLAGS_USERPTR) {
+		offset = bo_priv->user_addr;
+	}
+	/* Create the BO */
+	ret = amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu(pdd->dev->adev, bo_bucket->addr,
+						      bo_bucket->size, pdd->drm_priv, kgd_mem,
+						      &offset, bo_bucket->alloc_flags, criu_resume);
+	if (ret) {
+		pr_err("Could not create the BO\n");
+		return ret;
+	}
+	pr_debug("New BO created: size:0x%llx addr:0x%llx offset:0x%llx\n",
+		 bo_bucket->size, bo_bucket->addr, offset);
+
+	/* Restore previous IDR handle */
+	pr_debug("Restoring old IDR handle for the BO");
+	idr_handle = idr_alloc(&pdd->alloc_idr, *kgd_mem, bo_priv->idr_handle,
+			       bo_priv->idr_handle + 1, GFP_KERNEL);
+
+	if (idr_handle < 0) {
+		pr_err("Could not allocate idr\n");
+		amdgpu_amdkfd_gpuvm_free_memory_of_gpu(pdd->dev->adev, *kgd_mem, pdd->drm_priv,
+						       NULL);
+		return -ENOMEM;
+	}
+
+	if (bo_bucket->alloc_flags & KFD_IOC_ALLOC_MEM_FLAGS_DOORBELL)
+		bo_bucket->restored_offset = KFD_MMAP_TYPE_DOORBELL | KFD_MMAP_GPU_ID(pdd->dev->id);
+	if (bo_bucket->alloc_flags & KFD_IOC_ALLOC_MEM_FLAGS_MMIO_REMAP) {
+		bo_bucket->restored_offset = KFD_MMAP_TYPE_MMIO | KFD_MMAP_GPU_ID(pdd->dev->id);
+	} else if (bo_bucket->alloc_flags & KFD_IOC_ALLOC_MEM_FLAGS_GTT) {
+		bo_bucket->restored_offset = offset;
+	} else if (bo_bucket->alloc_flags & KFD_IOC_ALLOC_MEM_FLAGS_VRAM) {
+		bo_bucket->restored_offset = offset;
+		/* Update the VRAM usage count */
+		WRITE_ONCE(pdd->vram_usage, pdd->vram_usage + bo_bucket->size);
+	}
+	return 0;
+}
+
+static int criu_restore_bo(struct kfd_process *p,
+			   struct kfd_criu_bo_bucket *bo_bucket,
+			   struct kfd_criu_bo_priv_data *bo_priv)
+{
+	struct kfd_process_device *pdd;
+	struct kgd_mem *kgd_mem;
+	int ret;
+	int j;
+
+	pr_debug("Restoring BO size:0x%llx addr:0x%llx gpu_id:0x%x flags:0x%x idr_handle:0x%x\n",
+		 bo_bucket->size, bo_bucket->addr, bo_bucket->gpu_id, bo_bucket->alloc_flags,
+		 bo_priv->idr_handle);
+
+	pdd = kfd_process_device_data_by_id(p, bo_bucket->gpu_id);
+	if (!pdd) {
+		pr_err("Failed to get pdd\n");
+		return -ENODEV;
+	}
+
+	ret = criu_restore_memory_of_gpu(pdd, bo_bucket, bo_priv, &kgd_mem);
+	if (ret)
+		return ret;
+
+	/* now map these BOs to GPU/s */
+	for (j = 0; j < p->n_pdds; j++) {
+		struct kfd_node *peer;
+		struct kfd_process_device *peer_pdd;
+
+		if (!bo_priv->mapped_gpuids[j])
+			break;
+
+		peer_pdd = kfd_process_device_data_by_id(p, bo_priv->mapped_gpuids[j]);
+		if (!peer_pdd)
+			return -EINVAL;
+
+		peer = peer_pdd->dev;
+
+		peer_pdd = kfd_bind_process_to_device(peer, p);
+		if (IS_ERR(peer_pdd))
+			return PTR_ERR(peer_pdd);
+
+		ret = amdgpu_amdkfd_gpuvm_map_memory_to_gpu(peer->adev, kgd_mem,
+							    peer_pdd->drm_priv);
+		if (ret) {
+			pr_err("Failed to map to gpu %d/%d\n", j, p->n_pdds);
+			return ret;
+		}
+	}
+
+	pr_debug("map memory was successful for the BO\n");
+	/* create the dmabuf object and export the bo */
+	if (bo_bucket->alloc_flags
+	    & (KFD_IOC_ALLOC_MEM_FLAGS_VRAM | KFD_IOC_ALLOC_MEM_FLAGS_GTT)) {
+		ret = criu_get_prime_handle(kgd_mem, DRM_RDWR,
+					    &bo_bucket->dmabuf_fd);
+		if (ret)
+			return ret;
+	} else {
+		bo_bucket->dmabuf_fd = KFD_INVALID_FD;
+	}
+
+	return 0;
+}
+
+static int criu_restore_bos(struct kfd_process *p,
+			    struct kfd_ioctl_criu_args *args,
+			    uint64_t *priv_offset,
+			    uint64_t max_priv_data_size)
+{
+	struct kfd_criu_bo_bucket *bo_buckets = NULL;
+	struct kfd_criu_bo_priv_data *bo_privs = NULL;
+	int ret = 0;
+	uint32_t i = 0;
+
+	if (*priv_offset + (args->num_bos * sizeof(*bo_privs)) > max_priv_data_size)
+		return -EINVAL;
+
+	/* Prevent MMU notifications until stage-4 IOCTL (CRIU_RESUME) is received */
+	amdgpu_amdkfd_block_mmu_notifications(p->kgd_process_info);
+
+	bo_buckets = kvmalloc_array(args->num_bos, sizeof(*bo_buckets), GFP_KERNEL);
+	if (!bo_buckets)
+		return -ENOMEM;
+
+	ret = copy_from_user(bo_buckets, (void __user *)args->bos,
+			     args->num_bos * sizeof(*bo_buckets));
+	if (ret) {
+		pr_err("Failed to copy BOs information from user\n");
+		ret = -EFAULT;
+		goto exit;
+	}
+
+	bo_privs = kvmalloc_array(args->num_bos, sizeof(*bo_privs), GFP_KERNEL);
+	if (!bo_privs) {
+		ret = -ENOMEM;
+		goto exit;
+	}
+
+	ret = copy_from_user(bo_privs, (void __user *)args->priv_data + *priv_offset,
+			     args->num_bos * sizeof(*bo_privs));
+	if (ret) {
+		pr_err("Failed to copy BOs information from user\n");
+		ret = -EFAULT;
+		goto exit;
+	}
+	*priv_offset += args->num_bos * sizeof(*bo_privs);
+
+	/* Create and map new BOs */
+	for (; i < args->num_bos; i++) {
+		ret = criu_restore_bo(p, &bo_buckets[i], &bo_privs[i]);
+		if (ret) {
+			pr_debug("Failed to restore BO[%d] ret%d\n", i, ret);
+			goto exit;
+		}
+	} /* done */
+
+	/* Copy only the buckets back so user can read bo_buckets[N].restored_offset */
+	ret = copy_to_user((void __user *)args->bos,
+				bo_buckets,
+				(args->num_bos * sizeof(*bo_buckets)));
+	if (ret)
+		ret = -EFAULT;
+
+exit:
+	while (ret && i--) {
+		if (bo_buckets[i].alloc_flags
+		   & (KFD_IOC_ALLOC_MEM_FLAGS_VRAM | KFD_IOC_ALLOC_MEM_FLAGS_GTT))
+			close_fd(bo_buckets[i].dmabuf_fd);
+	}
+	kvfree(bo_buckets);
+	kvfree(bo_privs);
+	return ret;
+}
+
+static int criu_restore_objects(struct file *filep,
+				struct kfd_process *p,
+				struct kfd_ioctl_criu_args *args,
+				uint64_t *priv_offset,
+				uint64_t max_priv_data_size)
+{
+	int ret = 0;
+	uint32_t i;
+
+	BUILD_BUG_ON(offsetof(struct kfd_criu_queue_priv_data, object_type));
+	BUILD_BUG_ON(offsetof(struct kfd_criu_event_priv_data, object_type));
+	BUILD_BUG_ON(offsetof(struct kfd_criu_svm_range_priv_data, object_type));
+
+	for (i = 0; i < args->num_objects; i++) {
+		uint32_t object_type;
+
+		if (*priv_offset + sizeof(object_type) > max_priv_data_size) {
+			pr_err("Invalid private data size\n");
+			return -EINVAL;
+		}
+
+		ret = get_user(object_type, (uint32_t __user *)(args->priv_data + *priv_offset));
+		if (ret) {
+			pr_err("Failed to copy private information from user\n");
+			goto exit;
+		}
+
+		switch (object_type) {
+		case KFD_CRIU_OBJECT_TYPE_QUEUE:
+			ret = kfd_criu_restore_queue(p, (uint8_t __user *)args->priv_data,
+						     priv_offset, max_priv_data_size);
+			if (ret)
+				goto exit;
+			break;
+		case KFD_CRIU_OBJECT_TYPE_EVENT:
+			ret = kfd_criu_restore_event(filep, p, (uint8_t __user *)args->priv_data,
+						     priv_offset, max_priv_data_size);
+			if (ret)
+				goto exit;
+			break;
+		case KFD_CRIU_OBJECT_TYPE_SVM_RANGE:
+			ret = kfd_criu_restore_svm(p, (uint8_t __user *)args->priv_data,
+						     priv_offset, max_priv_data_size);
+			if (ret)
+				goto exit;
+			break;
+		default:
+			pr_err("Invalid object type:%u at index:%d\n", object_type, i);
+			ret = -EINVAL;
+			goto exit;
+		}
+	}
+exit:
+	return ret;
+}
+
+static int criu_restore(struct file *filep,
+			struct kfd_process *p,
+			struct kfd_ioctl_criu_args *args)
+{
+	uint64_t priv_offset = 0;
+	int ret = 0;
+
+	pr_debug("CRIU restore (num_devices:%u num_bos:%u num_objects:%u priv_data_size:%llu)\n",
+		 args->num_devices, args->num_bos, args->num_objects, args->priv_data_size);
+
+	if (!args->bos || !args->devices || !args->priv_data || !args->priv_data_size ||
+	    !args->num_devices || !args->num_bos)
+		return -EINVAL;
+
+	mutex_lock(&p->mutex);
+
+	/*
+	 * Set the process to evicted state to avoid running any new queues before all the memory
+	 * mappings are ready.
+	 */
+	ret = kfd_process_evict_queues(p, KFD_QUEUE_EVICTION_CRIU_RESTORE);
+	if (ret)
+		goto exit_unlock;
+
+	/* Each function will adjust priv_offset based on how many bytes they consumed */
+	ret = criu_restore_process(p, args, &priv_offset, args->priv_data_size);
+	if (ret)
+		goto exit_unlock;
+
+	ret = criu_restore_devices(p, args, &priv_offset, args->priv_data_size);
+	if (ret)
+		goto exit_unlock;
+
+	ret = criu_restore_bos(p, args, &priv_offset, args->priv_data_size);
+	if (ret)
+		goto exit_unlock;
+
+	ret = criu_restore_objects(filep, p, args, &priv_offset, args->priv_data_size);
+	if (ret)
+		goto exit_unlock;
+
+	if (priv_offset != args->priv_data_size) {
+		pr_err("Invalid private data size\n");
+		ret = -EINVAL;
+	}
+
+exit_unlock:
+	mutex_unlock(&p->mutex);
+	if (ret)
+		pr_err("Failed to restore CRIU ret:%d\n", ret);
+	else
+		pr_debug("CRIU restore successful\n");
+
+	return ret;
+}
+
+static int criu_unpause(struct file *filep,
+			struct kfd_process *p,
+			struct kfd_ioctl_criu_args *args)
+{
+	int ret;
+
+	mutex_lock(&p->mutex);
+
+	if (!p->queues_paused) {
+		mutex_unlock(&p->mutex);
+		return -EINVAL;
+	}
+
+	ret = kfd_process_restore_queues(p);
+	if (ret)
+		pr_err("Failed to unpause queues ret:%d\n", ret);
+	else
+		p->queues_paused = false;
+
+	mutex_unlock(&p->mutex);
+
+	return ret;
+}
+
+static int criu_resume(struct file *filep,
+			struct kfd_process *p,
+			struct kfd_ioctl_criu_args *args)
+{
+	struct kfd_process *target = NULL;
+	struct pid *pid = NULL;
+	int ret = 0;
+
+	pr_debug("Inside %s, target pid for criu restore: %d\n", __func__,
+		 args->pid);
+
+	pid = find_get_pid(args->pid);
+	if (!pid) {
+		pr_err("Cannot find pid info for %i\n", args->pid);
+		return -ESRCH;
+	}
+
+	pr_debug("calling kfd_lookup_process_by_pid\n");
+	target = kfd_lookup_process_by_pid(pid);
+
+	put_pid(pid);
+
+	if (!target) {
+		pr_debug("Cannot find process info for %i\n", args->pid);
+		return -ESRCH;
+	}
+
+	mutex_lock(&target->mutex);
+	ret = kfd_criu_resume_svm(target);
+	if (ret) {
+		pr_err("kfd_criu_resume_svm failed for %i\n", args->pid);
+		goto exit;
+	}
+
+	ret =  amdgpu_amdkfd_criu_resume(target->kgd_process_info);
+	if (ret)
+		pr_err("amdgpu_amdkfd_criu_resume failed for %i\n", args->pid);
+
+exit:
+	mutex_unlock(&target->mutex);
+
+	kfd_unref_process(target);
+	return ret;
+}
+
+static int criu_process_info(struct file *filep,
+				struct kfd_process *p,
+				struct kfd_ioctl_criu_args *args)
+{
+	int ret = 0;
+
+	mutex_lock(&p->mutex);
+
+	if (!p->n_pdds) {
+		pr_err("No pdd for given process\n");
+		ret = -ENODEV;
+		goto err_unlock;
+	}
+
+	ret = kfd_process_evict_queues(p, KFD_QUEUE_EVICTION_CRIU_CHECKPOINT);
+	if (ret)
+		goto err_unlock;
+
+	p->queues_paused = true;
+
+	args->pid = task_pid_nr_ns(p->lead_thread,
+					task_active_pid_ns(p->lead_thread));
+
+	ret = criu_get_process_object_info(p, &args->num_devices, &args->num_bos,
+					   &args->num_objects, &args->priv_data_size);
+	if (ret)
+		goto err_unlock;
+
+	dev_dbg(kfd_device, "Num of devices:%u bos:%u objects:%u priv_data_size:%lld\n",
+				args->num_devices, args->num_bos, args->num_objects,
+				args->priv_data_size);
+
+err_unlock:
+	if (ret) {
+		kfd_process_restore_queues(p);
+		p->queues_paused = false;
+	}
+	mutex_unlock(&p->mutex);
+	return ret;
+}
+
+static int kfd_ioctl_criu(struct file *filep, struct kfd_process *p, void *data)
+{
+	struct kfd_ioctl_criu_args *args = data;
+	int ret;
+
+	dev_dbg(kfd_device, "CRIU operation: %d\n", args->op);
+	switch (args->op) {
+	case KFD_CRIU_OP_PROCESS_INFO:
+		ret = criu_process_info(filep, p, args);
+		break;
+	case KFD_CRIU_OP_CHECKPOINT:
+		ret = criu_checkpoint(filep, p, args);
+		break;
+	case KFD_CRIU_OP_UNPAUSE:
+		ret = criu_unpause(filep, p, args);
+		break;
+	case KFD_CRIU_OP_RESTORE:
+		ret = criu_restore(filep, p, args);
+		break;
+	case KFD_CRIU_OP_RESUME:
+		ret = criu_resume(filep, p, args);
+		break;
+	default:
+		dev_dbg(kfd_device, "Unsupported CRIU operation:%d\n", args->op);
+		ret = -EINVAL;
+		break;
+	}
+
+	if (ret)
+		dev_dbg(kfd_device, "CRIU operation:%d err:%d\n", args->op, ret);
+
+	return ret;
+}
+
+static int runtime_enable(struct kfd_process *p, uint64_t r_debug,
+			bool enable_ttmp_setup)
+{
+	int i = 0, ret = 0;
+
+	if (p->is_runtime_retry)
+		goto retry;
+
+	if (p->runtime_info.runtime_state != DEBUG_RUNTIME_STATE_DISABLED)
+		return -EBUSY;
+
+	for (i = 0; i < p->n_pdds; i++) {
+		struct kfd_process_device *pdd = p->pdds[i];
+
+		if (pdd->qpd.queue_count)
+			return -EEXIST;
+
+		/*
+		 * Setup TTMPs by default.
+		 * Note that this call must remain here for MES ADD QUEUE to
+		 * skip_process_ctx_clear unconditionally as the first call to
+		 * SET_SHADER_DEBUGGER clears any stale process context data
+		 * saved in MES.
+		 */
+		if (pdd->dev->kfd->shared_resources.enable_mes)
+			kfd_dbg_set_mes_debug_mode(pdd, !kfd_dbg_has_cwsr_workaround(pdd->dev));
+	}
+
+	p->runtime_info.runtime_state = DEBUG_RUNTIME_STATE_ENABLED;
+	p->runtime_info.r_debug = r_debug;
+	p->runtime_info.ttmp_setup = enable_ttmp_setup;
+
+	if (p->runtime_info.ttmp_setup) {
+		for (i = 0; i < p->n_pdds; i++) {
+			struct kfd_process_device *pdd = p->pdds[i];
+
+			if (!kfd_dbg_is_rlc_restore_supported(pdd->dev)) {
+				amdgpu_gfx_off_ctrl(pdd->dev->adev, false);
+				pdd->dev->kfd2kgd->enable_debug_trap(
+						pdd->dev->adev,
+						true,
+						pdd->dev->vm_info.last_vmid_kfd);
+			} else if (kfd_dbg_is_per_vmid_supported(pdd->dev)) {
+				pdd->spi_dbg_override = pdd->dev->kfd2kgd->enable_debug_trap(
+						pdd->dev->adev,
+						false,
+						0);
+			}
+		}
+	}
+
+retry:
+	if (p->debug_trap_enabled) {
+		if (!p->is_runtime_retry) {
+			kfd_dbg_trap_activate(p);
+			kfd_dbg_ev_raise(KFD_EC_MASK(EC_PROCESS_RUNTIME),
+					p, NULL, 0, false, NULL, 0);
+		}
+
+		mutex_unlock(&p->mutex);
+		ret = down_interruptible(&p->runtime_enable_sema);
+		mutex_lock(&p->mutex);
+
+		p->is_runtime_retry = !!ret;
+	}
+
+	return ret;
+}
+
+static int runtime_disable(struct kfd_process *p)
+{
+	int i = 0, ret;
+	bool was_enabled = p->runtime_info.runtime_state == DEBUG_RUNTIME_STATE_ENABLED;
+
+	p->runtime_info.runtime_state = DEBUG_RUNTIME_STATE_DISABLED;
+	p->runtime_info.r_debug = 0;
+
+	if (p->debug_trap_enabled) {
+		if (was_enabled)
+			kfd_dbg_trap_deactivate(p, false, 0);
+
+		if (!p->is_runtime_retry)
+			kfd_dbg_ev_raise(KFD_EC_MASK(EC_PROCESS_RUNTIME),
+					p, NULL, 0, false, NULL, 0);
+
+		mutex_unlock(&p->mutex);
+		ret = down_interruptible(&p->runtime_enable_sema);
+		mutex_lock(&p->mutex);
+
+		p->is_runtime_retry = !!ret;
+		if (ret)
+			return ret;
+	}
+
+	if (was_enabled && p->runtime_info.ttmp_setup) {
+		for (i = 0; i < p->n_pdds; i++) {
+			struct kfd_process_device *pdd = p->pdds[i];
+
+			if (!kfd_dbg_is_rlc_restore_supported(pdd->dev))
+				amdgpu_gfx_off_ctrl(pdd->dev->adev, true);
+		}
+	}
+
+	p->runtime_info.ttmp_setup = false;
+
+	/* disable ttmp setup */
+	for (i = 0; i < p->n_pdds; i++) {
+		struct kfd_process_device *pdd = p->pdds[i];
+
+		if (kfd_dbg_is_per_vmid_supported(pdd->dev)) {
+			pdd->spi_dbg_override =
+					pdd->dev->kfd2kgd->disable_debug_trap(
+					pdd->dev->adev,
+					false,
+					pdd->dev->vm_info.last_vmid_kfd);
+
+			if (!pdd->dev->kfd->shared_resources.enable_mes)
+				debug_refresh_runlist(pdd->dev->dqm);
+			else
+				kfd_dbg_set_mes_debug_mode(pdd,
+							   !kfd_dbg_has_cwsr_workaround(pdd->dev));
+		}
+	}
+
+	return 0;
+}
+
+static int kfd_ioctl_runtime_enable(struct file *filep, struct kfd_process *p, void *data)
+{
+	struct kfd_ioctl_runtime_enable_args *args = data;
+	int r;
+
+	mutex_lock(&p->mutex);
+
+	if (args->mode_mask & KFD_RUNTIME_ENABLE_MODE_ENABLE_MASK)
+		r = runtime_enable(p, args->r_debug,
+				!!(args->mode_mask & KFD_RUNTIME_ENABLE_MODE_TTMP_SAVE_MASK));
+	else
+		r = runtime_disable(p);
+
+	mutex_unlock(&p->mutex);
+
+	return r;
+}
+
+static int kfd_ioctl_set_debug_trap(struct file *filep, struct kfd_process *p, void *data)
+{
+	struct kfd_ioctl_dbg_trap_args *args = data;
+	struct task_struct *thread = NULL;
+	struct mm_struct *mm = NULL;
+	struct pid *pid = NULL;
+	struct kfd_process *target = NULL;
+	struct kfd_process_device *pdd = NULL;
+	int r = 0;
+
+	if (sched_policy == KFD_SCHED_POLICY_NO_HWS) {
+		pr_err("Debugging does not support sched_policy %i", sched_policy);
+		return -EINVAL;
+	}
+
+	pid = find_get_pid(args->pid);
+	if (!pid) {
+		pr_debug("Cannot find pid info for %i\n", args->pid);
+		r = -ESRCH;
+		goto out;
+	}
+
+	thread = get_pid_task(pid, PIDTYPE_PID);
+	if (!thread) {
+		r = -ESRCH;
+		goto out;
+	}
+
+	mm = get_task_mm(thread);
+	if (!mm) {
+		r = -ESRCH;
+		goto out;
+	}
+
+	if (args->op == KFD_IOC_DBG_TRAP_ENABLE) {
+		bool create_process;
+
+		rcu_read_lock();
+		create_process = thread && thread != current && ptrace_parent(thread) == current;
+		rcu_read_unlock();
+
+		target = create_process ? kfd_create_process(thread) :
+					kfd_lookup_process_by_pid(pid);
+	} else {
+		target = kfd_lookup_process_by_pid(pid);
+	}
+
+	if (IS_ERR_OR_NULL(target)) {
+		pr_debug("Cannot find process PID %i to debug\n", args->pid);
+		r = target ? PTR_ERR(target) : -ESRCH;
+		goto out;
+	}
+
+	/* Check if target is still PTRACED. */
+	rcu_read_lock();
+	if (target != p && args->op != KFD_IOC_DBG_TRAP_DISABLE
+				&& ptrace_parent(target->lead_thread) != current) {
+		pr_err("PID %i is not PTRACED and cannot be debugged\n", args->pid);
+		r = -EPERM;
+	}
+	rcu_read_unlock();
+
+	if (r)
+		goto out;
+
+	mutex_lock(&target->mutex);
+
+	if (args->op != KFD_IOC_DBG_TRAP_ENABLE && !target->debug_trap_enabled) {
+		pr_err("PID %i not debug enabled for op %i\n", args->pid, args->op);
+		r = -EINVAL;
+		goto unlock_out;
+	}
+
+	if (target->runtime_info.runtime_state != DEBUG_RUNTIME_STATE_ENABLED &&
+			(args->op == KFD_IOC_DBG_TRAP_SET_WAVE_LAUNCH_OVERRIDE ||
+			 args->op == KFD_IOC_DBG_TRAP_SET_WAVE_LAUNCH_MODE ||
+			 args->op == KFD_IOC_DBG_TRAP_SUSPEND_QUEUES ||
+			 args->op == KFD_IOC_DBG_TRAP_RESUME_QUEUES ||
+			 args->op == KFD_IOC_DBG_TRAP_SET_NODE_ADDRESS_WATCH ||
+			 args->op == KFD_IOC_DBG_TRAP_CLEAR_NODE_ADDRESS_WATCH ||
+			 args->op == KFD_IOC_DBG_TRAP_SET_FLAGS)) {
+		r = -EPERM;
+		goto unlock_out;
+	}
+
+	if (args->op == KFD_IOC_DBG_TRAP_SET_NODE_ADDRESS_WATCH ||
+	    args->op == KFD_IOC_DBG_TRAP_CLEAR_NODE_ADDRESS_WATCH) {
+		int user_gpu_id = kfd_process_get_user_gpu_id(target,
+				args->op == KFD_IOC_DBG_TRAP_SET_NODE_ADDRESS_WATCH ?
+					args->set_node_address_watch.gpu_id :
+					args->clear_node_address_watch.gpu_id);
+
+		pdd = kfd_process_device_data_by_id(target, user_gpu_id);
+		if (user_gpu_id == -EINVAL || !pdd) {
+			r = -ENODEV;
+			goto unlock_out;
+		}
+	}
+
+	switch (args->op) {
+	case KFD_IOC_DBG_TRAP_ENABLE:
+		if (target != p)
+			target->debugger_process = p;
+
+		r = kfd_dbg_trap_enable(target,
+					args->enable.dbg_fd,
+					(void __user *)args->enable.rinfo_ptr,
+					&args->enable.rinfo_size);
+		if (!r)
+			target->exception_enable_mask = args->enable.exception_mask;
+
+		break;
+	case KFD_IOC_DBG_TRAP_DISABLE:
+		r = kfd_dbg_trap_disable(target);
+		break;
+	case KFD_IOC_DBG_TRAP_SEND_RUNTIME_EVENT:
+		r = kfd_dbg_send_exception_to_runtime(target,
+				args->send_runtime_event.gpu_id,
+				args->send_runtime_event.queue_id,
+				args->send_runtime_event.exception_mask);
+		break;
+	case KFD_IOC_DBG_TRAP_SET_EXCEPTIONS_ENABLED:
+		kfd_dbg_set_enabled_debug_exception_mask(target,
+				args->set_exceptions_enabled.exception_mask);
+		break;
+	case KFD_IOC_DBG_TRAP_SET_WAVE_LAUNCH_OVERRIDE:
+		r = kfd_dbg_trap_set_wave_launch_override(target,
+				args->launch_override.override_mode,
+				args->launch_override.enable_mask,
+				args->launch_override.support_request_mask,
+				&args->launch_override.enable_mask,
+				&args->launch_override.support_request_mask);
+		break;
+	case KFD_IOC_DBG_TRAP_SET_WAVE_LAUNCH_MODE:
+		r = kfd_dbg_trap_set_wave_launch_mode(target,
+				args->launch_mode.launch_mode);
+		break;
+	case KFD_IOC_DBG_TRAP_SUSPEND_QUEUES:
+		r = suspend_queues(target,
+				args->suspend_queues.num_queues,
+				args->suspend_queues.grace_period,
+				args->suspend_queues.exception_mask,
+				(uint32_t *)args->suspend_queues.queue_array_ptr);
+
+		break;
+	case KFD_IOC_DBG_TRAP_RESUME_QUEUES:
+		r = resume_queues(target, args->resume_queues.num_queues,
+				(uint32_t *)args->resume_queues.queue_array_ptr);
+		break;
+	case KFD_IOC_DBG_TRAP_SET_NODE_ADDRESS_WATCH:
+		r = kfd_dbg_trap_set_dev_address_watch(pdd,
+				args->set_node_address_watch.address,
+				args->set_node_address_watch.mask,
+				&args->set_node_address_watch.id,
+				args->set_node_address_watch.mode);
+		break;
+	case KFD_IOC_DBG_TRAP_CLEAR_NODE_ADDRESS_WATCH:
+		r = kfd_dbg_trap_clear_dev_address_watch(pdd,
+				args->clear_node_address_watch.id);
+		break;
+	case KFD_IOC_DBG_TRAP_SET_FLAGS:
+		r = kfd_dbg_trap_set_flags(target, &args->set_flags.flags);
+		break;
+	case KFD_IOC_DBG_TRAP_QUERY_DEBUG_EVENT:
+		r = kfd_dbg_ev_query_debug_event(target,
+				&args->query_debug_event.queue_id,
+				&args->query_debug_event.gpu_id,
+				args->query_debug_event.exception_mask,
+				&args->query_debug_event.exception_mask);
+		break;
+	case KFD_IOC_DBG_TRAP_QUERY_EXCEPTION_INFO:
+		r = kfd_dbg_trap_query_exception_info(target,
+				args->query_exception_info.source_id,
+				args->query_exception_info.exception_code,
+				args->query_exception_info.clear_exception,
+				(void __user *)args->query_exception_info.info_ptr,
+				&args->query_exception_info.info_size);
+		break;
+	case KFD_IOC_DBG_TRAP_GET_QUEUE_SNAPSHOT:
+		r = pqm_get_queue_snapshot(&target->pqm,
+				args->queue_snapshot.exception_mask,
+				(void __user *)args->queue_snapshot.snapshot_buf_ptr,
+				&args->queue_snapshot.num_queues,
+				&args->queue_snapshot.entry_size);
+		break;
+	case KFD_IOC_DBG_TRAP_GET_DEVICE_SNAPSHOT:
+		r = kfd_dbg_trap_device_snapshot(target,
+				args->device_snapshot.exception_mask,
+				(void __user *)args->device_snapshot.snapshot_buf_ptr,
+				&args->device_snapshot.num_devices,
+				&args->device_snapshot.entry_size);
+		break;
+	default:
+		pr_err("Invalid option: %i\n", args->op);
+		r = -EINVAL;
+	}
+
+unlock_out:
+	mutex_unlock(&target->mutex);
+
+out:
+	if (thread)
+		put_task_struct(thread);
+
+	if (mm)
+		mmput(mm);
+
+	if (pid)
+		put_pid(pid);
+
+	if (target)
+		kfd_unref_process(target);
+
+	return r;
+}
+
+#define AMDKFD_IOCTL_DEF(ioctl, _func, _flags) \
+	[_IOC_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, \
+			    .cmd_drv = 0, .name = #ioctl}
+
+/** Ioctl table */
+static const struct amdkfd_ioctl_desc amdkfd_ioctls[] = {
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_VERSION,
+			kfd_ioctl_get_version, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_CREATE_QUEUE,
+			kfd_ioctl_create_queue, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_DESTROY_QUEUE,
+			kfd_ioctl_destroy_queue, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_SET_MEMORY_POLICY,
+			kfd_ioctl_set_memory_policy, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_CLOCK_COUNTERS,
+			kfd_ioctl_get_clock_counters, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_PROCESS_APERTURES,
+			kfd_ioctl_get_process_apertures, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_UPDATE_QUEUE,
+			kfd_ioctl_update_queue, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_CREATE_EVENT,
+			kfd_ioctl_create_event, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_DESTROY_EVENT,
+			kfd_ioctl_destroy_event, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_SET_EVENT,
+			kfd_ioctl_set_event, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_RESET_EVENT,
+			kfd_ioctl_reset_event, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_WAIT_EVENTS,
+			kfd_ioctl_wait_events, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_DBG_REGISTER_DEPRECATED,
+			kfd_ioctl_dbg_register, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_DBG_UNREGISTER_DEPRECATED,
+			kfd_ioctl_dbg_unregister, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_DBG_ADDRESS_WATCH_DEPRECATED,
+			kfd_ioctl_dbg_address_watch, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_DBG_WAVE_CONTROL_DEPRECATED,
+			kfd_ioctl_dbg_wave_control, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_SET_SCRATCH_BACKING_VA,
+			kfd_ioctl_set_scratch_backing_va, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_TILE_CONFIG,
+			kfd_ioctl_get_tile_config, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_SET_TRAP_HANDLER,
+			kfd_ioctl_set_trap_handler, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_PROCESS_APERTURES_NEW,
+			kfd_ioctl_get_process_apertures_new, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_ACQUIRE_VM,
+			kfd_ioctl_acquire_vm, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_ALLOC_MEMORY_OF_GPU,
+			kfd_ioctl_alloc_memory_of_gpu, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_FREE_MEMORY_OF_GPU,
+			kfd_ioctl_free_memory_of_gpu, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_MAP_MEMORY_TO_GPU,
+			kfd_ioctl_map_memory_to_gpu, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_UNMAP_MEMORY_FROM_GPU,
+			kfd_ioctl_unmap_memory_from_gpu, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_SET_CU_MASK,
+			kfd_ioctl_set_cu_mask, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_QUEUE_WAVE_STATE,
+			kfd_ioctl_get_queue_wave_state, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_DMABUF_INFO,
+				kfd_ioctl_get_dmabuf_info, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_IMPORT_DMABUF,
+				kfd_ioctl_import_dmabuf, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_ALLOC_QUEUE_GWS,
+			kfd_ioctl_alloc_queue_gws, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_SMI_EVENTS,
+			kfd_ioctl_smi_events, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_SVM, kfd_ioctl_svm, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_SET_XNACK_MODE,
+			kfd_ioctl_set_xnack_mode, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_CRIU_OP,
+			kfd_ioctl_criu, KFD_IOC_FLAG_CHECKPOINT_RESTORE),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_AVAILABLE_MEMORY,
+			kfd_ioctl_get_available_memory, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_EXPORT_DMABUF,
+				kfd_ioctl_export_dmabuf, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_RUNTIME_ENABLE,
+			kfd_ioctl_runtime_enable, 0),
+
+	AMDKFD_IOCTL_DEF(AMDKFD_IOC_DBG_TRAP,
+			kfd_ioctl_set_debug_trap, 0),
+};
+
+#define AMDKFD_CORE_IOCTL_COUNT	ARRAY_SIZE(amdkfd_ioctls)
+
+static long kfd_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
+{
+	struct kfd_process *process;
+	amdkfd_ioctl_t *func;
+	const struct amdkfd_ioctl_desc *ioctl = NULL;
+	unsigned int nr = _IOC_NR(cmd);
+	char stack_kdata[128];
+	char *kdata = NULL;
+	unsigned int usize, asize;
+	int retcode = -EINVAL;
+	bool ptrace_attached = false;
+
+	if (nr >= AMDKFD_CORE_IOCTL_COUNT)
+		goto err_i1;
+
+	if ((nr >= AMDKFD_COMMAND_START) && (nr < AMDKFD_COMMAND_END)) {
+		u32 amdkfd_size;
+
+		ioctl = &amdkfd_ioctls[nr];
+
+		amdkfd_size = _IOC_SIZE(ioctl->cmd);
+		usize = asize = _IOC_SIZE(cmd);
+		if (amdkfd_size > asize)
+			asize = amdkfd_size;
+
+		cmd = ioctl->cmd;
+	} else
+		goto err_i1;
+
+	dev_dbg(kfd_device, "ioctl cmd 0x%x (#0x%x), arg 0x%lx\n", cmd, nr, arg);
+
+	/* Get the process struct from the filep. Only the process
+	 * that opened /dev/kfd can use the file descriptor. Child
+	 * processes need to create their own KFD device context.
+	 */
+	process = filep->private_data;
+
+	rcu_read_lock();
+	if ((ioctl->flags & KFD_IOC_FLAG_CHECKPOINT_RESTORE) &&
+	    ptrace_parent(process->lead_thread) == current)
+		ptrace_attached = true;
+	rcu_read_unlock();
+
+	if (process->lead_thread != current->group_leader
+	    && !ptrace_attached) {
+		dev_dbg(kfd_device, "Using KFD FD in wrong process\n");
+		retcode = -EBADF;
+		goto err_i1;
+	}
+
+	/* Do not trust userspace, use our own definition */
+	func = ioctl->func;
+
+	if (unlikely(!func)) {
+		dev_dbg(kfd_device, "no function\n");
+		retcode = -EINVAL;
+		goto err_i1;
+	}
+
+	/*
+	 * Versions of docker shipped in Ubuntu 18.xx and 20.xx do not support
+	 * CAP_CHECKPOINT_RESTORE, so we also allow access if CAP_SYS_ADMIN as CAP_SYS_ADMIN is a
+	 * more priviledged access.
+	 */
+	if (unlikely(ioctl->flags & KFD_IOC_FLAG_CHECKPOINT_RESTORE)) {
+		if (!capable(CAP_CHECKPOINT_RESTORE) &&
+						!capable(CAP_SYS_ADMIN)) {
+			retcode = -EACCES;
+			goto err_i1;
+		}
+	}
+
+	if (cmd & (IOC_IN | IOC_OUT)) {
+		if (asize <= sizeof(stack_kdata)) {
+			kdata = stack_kdata;
+		} else {
+			kdata = kmalloc(asize, GFP_KERNEL);
+			if (!kdata) {
+				retcode = -ENOMEM;
+				goto err_i1;
+			}
+		}
+		if (asize > usize)
+			memset(kdata + usize, 0, asize - usize);
+	}
+
+	if (cmd & IOC_IN) {
+		if (copy_from_user(kdata, (void __user *)arg, usize) != 0) {
+			retcode = -EFAULT;
+			goto err_i1;
+		}
+	} else if (cmd & IOC_OUT) {
+		memset(kdata, 0, usize);
+	}
+
+	retcode = func(filep, process, kdata);
+
+	if (cmd & IOC_OUT)
+		if (copy_to_user((void __user *)arg, kdata, usize) != 0)
+			retcode = -EFAULT;
+
+err_i1:
+	if (!ioctl)
+		dev_dbg(kfd_device, "invalid ioctl: pid=%d, cmd=0x%02x, nr=0x%02x\n",
+			  task_pid_nr(current), cmd, nr);
+
+	if (kdata != stack_kdata)
+		kfree(kdata);
+
+	if (retcode)
+		dev_dbg(kfd_device, "ioctl cmd (#0x%x), arg 0x%lx, ret = %d\n",
+				nr, arg, retcode);
+
+	return retcode;
+}
+
+static int kfd_mmio_mmap(struct kfd_node *dev, struct kfd_process *process,
+		      struct vm_area_struct *vma)
+{
+	phys_addr_t address;
+
+	if (vma->vm_end - vma->vm_start != PAGE_SIZE)
+		return -EINVAL;
+
+	address = dev->adev->rmmio_remap.bus_addr;
+
+	vm_flags_set(vma, VM_IO | VM_DONTCOPY | VM_DONTEXPAND | VM_NORESERVE |
+				VM_DONTDUMP | VM_PFNMAP);
+
+	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+
+	pr_debug("pasid 0x%x mapping mmio page\n"
+		 "     target user address == 0x%08llX\n"
+		 "     physical address    == 0x%08llX\n"
+		 "     vm_flags            == 0x%04lX\n"
+		 "     size                == 0x%04lX\n",
+		 process->pasid, (unsigned long long) vma->vm_start,
+		 address, vma->vm_flags, PAGE_SIZE);
+
+	return io_remap_pfn_range(vma,
+				vma->vm_start,
+				address >> PAGE_SHIFT,
+				PAGE_SIZE,
+				vma->vm_page_prot);
+}
+
+
+static int kfd_mmap(struct file *filp, struct vm_area_struct *vma)
+{
+	struct kfd_process *process;
+	struct kfd_node *dev = NULL;
+	unsigned long mmap_offset;
+	unsigned int gpu_id;
+
+	process = kfd_get_process(current);
+	if (IS_ERR(process))
+		return PTR_ERR(process);
+
+	mmap_offset = vma->vm_pgoff << PAGE_SHIFT;
+	gpu_id = KFD_MMAP_GET_GPU_ID(mmap_offset);
+	if (gpu_id)
+		dev = kfd_device_by_id(gpu_id);
+
+	switch (mmap_offset & KFD_MMAP_TYPE_MASK) {
+	case KFD_MMAP_TYPE_DOORBELL:
+		if (!dev)
+			return -ENODEV;
+		return kfd_doorbell_mmap(dev, process, vma);
+
+	case KFD_MMAP_TYPE_EVENTS:
+		return kfd_event_mmap(process, vma);
+
+	case KFD_MMAP_TYPE_RESERVED_MEM:
+		if (!dev)
+			return -ENODEV;
+		return kfd_reserved_mem_mmap(dev, process, vma);
+	case KFD_MMAP_TYPE_MMIO:
+		if (!dev)
+			return -ENODEV;
+		return kfd_mmio_mmap(dev, process, vma);
+	}
+
+	return -EFAULT;
+}