drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c - linux/kernel/git/bpf/bpf - Git at Google

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

 #include <linux/slab.h>
 #include <linux/list.h>
 #include "kfd_device_queue_manager.h"
 #include "kfd_priv.h"
 #include "kfd_kernel_queue.h"
 #include "amdgpu_amdkfd.h"

 static inline struct process_queue_node *get_queue_by_qid(
 			struct process_queue_manager *pqm, unsigned int qid)
 {
 	struct process_queue_node *pqn;

 	list_for_each_entry(pqn, &pqm->queues, process_queue_list) {
 		if ((pqn->q && pqn->q->properties.queue_id == qid) ||
 		    (pqn->kq && pqn->kq->queue->properties.queue_id == qid))
 			return pqn;
 	}

 	return NULL;
 }

 static int find_available_queue_slot(struct process_queue_manager *pqm,
 					unsigned int *qid)
 {
 	unsigned long found;

 	found = find_first_zero_bit(pqm->queue_slot_bitmap,
 			KFD_MAX_NUM_OF_QUEUES_PER_PROCESS);

 	pr_debug("The new slot id %lu\n", found);

 	if (found >= KFD_MAX_NUM_OF_QUEUES_PER_PROCESS) {
 		pr_info("Cannot open more queues for process with pasid 0x%x\n",
 				pqm->process->pasid);
 		return -ENOMEM;
 	}

 	set_bit(found, pqm->queue_slot_bitmap);
 	*qid = found;

 	return 0;
 }

 void kfd_process_dequeue_from_device(struct kfd_process_device *pdd)
 {
 	struct kfd_dev *dev = pdd->dev;

 	if (pdd->already_dequeued)
 		return;

 	dev->dqm->ops.process_termination(dev->dqm, &pdd->qpd);
 	pdd->already_dequeued = true;
 }

 int pqm_set_gws(struct process_queue_manager *pqm, unsigned int qid,
 			void *gws)
 {
 	struct kfd_dev *dev = NULL;
 	struct process_queue_node *pqn;
 	struct kfd_process_device *pdd;
 	struct kgd_mem *mem = NULL;
 	int ret;

 	pqn = get_queue_by_qid(pqm, qid);
 	if (!pqn) {
 		pr_err("Queue id does not match any known queue\n");
 		return -EINVAL;
 	}

 	if (pqn->q)
 		dev = pqn->q->device;
 	if (WARN_ON(!dev))
 		return -ENODEV;

 	pdd = kfd_get_process_device_data(dev, pqm->process);
 	if (!pdd) {
 		pr_err("Process device data doesn't exist\n");
 		return -EINVAL;
 	}

 	/* Only allow one queue per process can have GWS assigned */
 	if (gws && pdd->qpd.num_gws)
 		return -EBUSY;

 	if (!gws && pdd->qpd.num_gws == 0)
 		return -EINVAL;

 	if (gws)
 		ret = amdgpu_amdkfd_add_gws_to_process(pdd->process->kgd_process_info,
 			gws, &mem);
 	else
 		ret = amdgpu_amdkfd_remove_gws_from_process(pdd->process->kgd_process_info,
 			pqn->q->gws);
 	if (unlikely(ret))
 		return ret;

 	pqn->q->gws = mem;
 	pdd->qpd.num_gws = gws ? amdgpu_amdkfd_get_num_gws(dev->kgd) : 0;

 	return pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
 							pqn->q);
 }

 void kfd_process_dequeue_from_all_devices(struct kfd_process *p)
 {
 	struct kfd_process_device *pdd;

 	list_for_each_entry(pdd, &p->per_device_data, per_device_list)
 		kfd_process_dequeue_from_device(pdd);
 }

 int pqm_init(struct process_queue_manager *pqm, struct kfd_process *p)
 {
 	INIT_LIST_HEAD(&pqm->queues);
 	pqm->queue_slot_bitmap =
 			kzalloc(DIV_ROUND_UP(KFD_MAX_NUM_OF_QUEUES_PER_PROCESS,
 					BITS_PER_BYTE), GFP_KERNEL);
 	if (!pqm->queue_slot_bitmap)
 		return -ENOMEM;
 	pqm->process = p;

 	return 0;
 }

 void pqm_uninit(struct process_queue_manager *pqm)
 {
 	struct process_queue_node *pqn, *next;

 	list_for_each_entry_safe(pqn, next, &pqm->queues, process_queue_list) {
 		if (pqn->q && pqn->q->gws)
 			amdgpu_amdkfd_remove_gws_from_process(pqm->process->kgd_process_info,
 				pqn->q->gws);
 		uninit_queue(pqn->q);
 		list_del(&pqn->process_queue_list);
 		kfree(pqn);
 	}

 	kfree(pqm->queue_slot_bitmap);
 	pqm->queue_slot_bitmap = NULL;
 }

 static int init_user_queue(struct process_queue_manager *pqm,
 				struct kfd_dev *dev, struct queue **q,
 				struct queue_properties *q_properties,
 				struct file *f, unsigned int qid)
 {
 	int retval;

 	/* Doorbell initialized in user space*/
 	q_properties->doorbell_ptr = NULL;

 	/* let DQM handle it*/
 	q_properties->vmid = 0;
 	q_properties->queue_id = qid;

 	retval = init_queue(q, q_properties);
 	if (retval != 0)
 		return retval;

 	(*q)->device = dev;
 	(*q)->process = pqm->process;

 	pr_debug("PQM After init queue");

 	return retval;
 }

 int pqm_create_queue(struct process_queue_manager *pqm,
 			    struct kfd_dev *dev,
 			    struct file *f,
 			    struct queue_properties *properties,
 			    unsigned int *qid,
 			    uint32_t *p_doorbell_offset_in_process)
 {
 	int retval;
 	struct kfd_process_device *pdd;
 	struct queue *q;
 	struct process_queue_node *pqn;
 	struct kernel_queue *kq;
 	enum kfd_queue_type type = properties->type;
 	unsigned int max_queues = 127; /* HWS limit */

 	q = NULL;
 	kq = NULL;

 	pdd = kfd_get_process_device_data(dev, pqm->process);
 	if (!pdd) {
 		pr_err("Process device data doesn't exist\n");
 		return -1;
 	}

 	/*
 	 * for debug process, verify that it is within the static queues limit
 	 * currently limit is set to half of the total avail HQD slots
 	 * If we are just about to create DIQ, the is_debug flag is not set yet
 	 * Hence we also check the type as well
 	 */
 	if ((pdd->qpd.is_debug) || (type == KFD_QUEUE_TYPE_DIQ))
 		max_queues = dev->device_info->max_no_of_hqd/2;

 	if (pdd->qpd.queue_count >= max_queues)
 		return -ENOSPC;

 	retval = find_available_queue_slot(pqm, qid);
 	if (retval != 0)
 		return retval;

 	if (list_empty(&pdd->qpd.queues_list) &&
 	    list_empty(&pdd->qpd.priv_queue_list))
 		dev->dqm->ops.register_process(dev->dqm, &pdd->qpd);

 	pqn = kzalloc(sizeof(*pqn), GFP_KERNEL);
 	if (!pqn) {
 		retval = -ENOMEM;
 		goto err_allocate_pqn;
 	}

 	switch (type) {
 	case KFD_QUEUE_TYPE_SDMA:
 	case KFD_QUEUE_TYPE_SDMA_XGMI:
 		if ((type == KFD_QUEUE_TYPE_SDMA && dev->dqm->sdma_queue_count
 			>= get_num_sdma_queues(dev->dqm)) ||
 			(type == KFD_QUEUE_TYPE_SDMA_XGMI &&
 			dev->dqm->xgmi_sdma_queue_count
 			>= get_num_xgmi_sdma_queues(dev->dqm))) {
 			pr_debug("Over-subscription is not allowed for SDMA.\n");
 			retval = -EPERM;
 			goto err_create_queue;
 		}

 		retval = init_user_queue(pqm, dev, &q, properties, f, *qid);
 		if (retval != 0)
 			goto err_create_queue;
 		pqn->q = q;
 		pqn->kq = NULL;
 		retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd);
 		pr_debug("DQM returned %d for create_queue\n", retval);
 		print_queue(q);
 		break;

 	case KFD_QUEUE_TYPE_COMPUTE:
 		/* check if there is over subscription */
 		if ((dev->dqm->sched_policy ==
 		     KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION) &&
 		((dev->dqm->processes_count >= dev->vm_info.vmid_num_kfd) ||
 		(dev->dqm->queue_count >= get_queues_num(dev->dqm)))) {
 			pr_debug("Over-subscription is not allowed when amdkfd.sched_policy == 1\n");
 			retval = -EPERM;
 			goto err_create_queue;
 		}

 		retval = init_user_queue(pqm, dev, &q, properties, f, *qid);
 		if (retval != 0)
 			goto err_create_queue;
 		pqn->q = q;
 		pqn->kq = NULL;
 		retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd);
 		pr_debug("DQM returned %d for create_queue\n", retval);
 		print_queue(q);
 		break;
 	case KFD_QUEUE_TYPE_DIQ:
 		kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_DIQ);
 		if (!kq) {
 			retval = -ENOMEM;
 			goto err_create_queue;
 		}
 		kq->queue->properties.queue_id = *qid;
 		pqn->kq = kq;
 		pqn->q = NULL;
 		retval = dev->dqm->ops.create_kernel_queue(dev->dqm,
 							kq, &pdd->qpd);
 		break;
 	default:
 		WARN(1, "Invalid queue type %d", type);
 		retval = -EINVAL;
 	}

 	if (retval != 0) {
 		pr_err("Pasid 0x%x DQM create queue %d failed. ret %d\n",
 			pqm->process->pasid, type, retval);
 		goto err_create_queue;
 	}

 	if (q && p_doorbell_offset_in_process)
 		/* Return the doorbell offset within the doorbell page
 		 * to the caller so it can be passed up to user mode
 		 * (in bytes).
 		 * There are always 1024 doorbells per process, so in case
 		 * of 8-byte doorbells, there are two doorbell pages per
 		 * process.
 		 */
 		*p_doorbell_offset_in_process =
 			(q->properties.doorbell_off * sizeof(uint32_t)) &
 			(kfd_doorbell_process_slice(dev) - 1);

 	pr_debug("PQM After DQM create queue\n");

 	list_add(&pqn->process_queue_list, &pqm->queues);

 	if (q) {
 		pr_debug("PQM done creating queue\n");
 		print_queue_properties(&q->properties);
 	}

 	return retval;

 err_create_queue:
 	kfree(pqn);
 err_allocate_pqn:
 	/* check if queues list is empty unregister process from device */
 	clear_bit(*qid, pqm->queue_slot_bitmap);
 	if (list_empty(&pdd->qpd.queues_list) &&
 	    list_empty(&pdd->qpd.priv_queue_list))
 		dev->dqm->ops.unregister_process(dev->dqm, &pdd->qpd);
 	return retval;
 }

 int pqm_destroy_queue(struct process_queue_manager *pqm, unsigned int qid)
 {
 	struct process_queue_node *pqn;
 	struct kfd_process_device *pdd;
 	struct device_queue_manager *dqm;
 	struct kfd_dev *dev;
 	int retval;

 	dqm = NULL;

 	retval = 0;

 	pqn = get_queue_by_qid(pqm, qid);
 	if (!pqn) {
 		pr_err("Queue id does not match any known queue\n");
 		return -EINVAL;
 	}

 	dev = NULL;
 	if (pqn->kq)
 		dev = pqn->kq->dev;
 	if (pqn->q)
 		dev = pqn->q->device;
 	if (WARN_ON(!dev))
 		return -ENODEV;

 	pdd = kfd_get_process_device_data(dev, pqm->process);
 	if (!pdd) {
 		pr_err("Process device data doesn't exist\n");
 		return -1;
 	}

 	if (pqn->kq) {
 		/* destroy kernel queue (DIQ) */
 		dqm = pqn->kq->dev->dqm;
 		dqm->ops.destroy_kernel_queue(dqm, pqn->kq, &pdd->qpd);
 		kernel_queue_uninit(pqn->kq, false);
 	}

 	if (pqn->q) {
 		dqm = pqn->q->device->dqm;
 		retval = dqm->ops.destroy_queue(dqm, &pdd->qpd, pqn->q);
 		if (retval) {
 			pr_err("Pasid 0x%x destroy queue %d failed, ret %d\n",
 				pqm->process->pasid,
 				pqn->q->properties.queue_id, retval);
 			if (retval != -ETIME)
 				goto err_destroy_queue;
 		}

 		if (pqn->q->gws) {
 			amdgpu_amdkfd_remove_gws_from_process(pqm->process->kgd_process_info,
 				pqn->q->gws);
 			pdd->qpd.num_gws = 0;
 		}

 		kfree(pqn->q->properties.cu_mask);
 		pqn->q->properties.cu_mask = NULL;
 		uninit_queue(pqn->q);
 	}

 	list_del(&pqn->process_queue_list);
 	kfree(pqn);
 	clear_bit(qid, pqm->queue_slot_bitmap);

 	if (list_empty(&pdd->qpd.queues_list) &&
 	    list_empty(&pdd->qpd.priv_queue_list))
 		dqm->ops.unregister_process(dqm, &pdd->qpd);

 err_destroy_queue:
 	return retval;
 }

 int pqm_update_queue(struct process_queue_manager *pqm, unsigned int qid,
 			struct queue_properties *p)
 {
 	int retval;
 	struct process_queue_node *pqn;

 	pqn = get_queue_by_qid(pqm, qid);
 	if (!pqn) {
 		pr_debug("No queue %d exists for update operation\n", qid);
 		return -EFAULT;
 	}

 	pqn->q->properties.queue_address = p->queue_address;
 	pqn->q->properties.queue_size = p->queue_size;
 	pqn->q->properties.queue_percent = p->queue_percent;
 	pqn->q->properties.priority = p->priority;

 	retval = pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
 							pqn->q);
 	if (retval != 0)
 		return retval;

 	return 0;
 }

 int pqm_set_cu_mask(struct process_queue_manager *pqm, unsigned int qid,
 			struct queue_properties *p)
 {
 	int retval;
 	struct process_queue_node *pqn;

 	pqn = get_queue_by_qid(pqm, qid);
 	if (!pqn) {
 		pr_debug("No queue %d exists for update operation\n", qid);
 		return -EFAULT;
 	}

 	/* Free the old CU mask memory if it is already allocated, then
 	 * allocate memory for the new CU mask.
 	 */
 	kfree(pqn->q->properties.cu_mask);

 	pqn->q->properties.cu_mask_count = p->cu_mask_count;
 	pqn->q->properties.cu_mask = p->cu_mask;

 	retval = pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
 							pqn->q);
 	if (retval != 0)
 		return retval;

 	return 0;
 }

 struct kernel_queue *pqm_get_kernel_queue(
 					struct process_queue_manager *pqm,
 					unsigned int qid)
 {
 	struct process_queue_node *pqn;

 	pqn = get_queue_by_qid(pqm, qid);
 	if (pqn && pqn->kq)
 		return pqn->kq;

 	return NULL;
 }

 int pqm_get_wave_state(struct process_queue_manager *pqm,
 		       unsigned int qid,
 		       void __user *ctl_stack,
 		       u32 *ctl_stack_used_size,
 		       u32 *save_area_used_size)
 {
 	struct process_queue_node *pqn;

 	pqn = get_queue_by_qid(pqm, qid);
 	if (!pqn) {
 		pr_debug("amdkfd: No queue %d exists for operation\n",
 			 qid);
 		return -EFAULT;
 	}

 	return pqn->q->device->dqm->ops.get_wave_state(pqn->q->device->dqm,
 						       pqn->q,
 						       ctl_stack,
 						       ctl_stack_used_size,
 						       save_area_used_size);
 }

 #if defined(CONFIG_DEBUG_FS)

 int pqm_debugfs_mqds(struct seq_file *m, void *data)
 {
 	struct process_queue_manager *pqm = data;
 	struct process_queue_node *pqn;
 	struct queue *q;
 	enum KFD_MQD_TYPE mqd_type;
 	struct mqd_manager *mqd_mgr;
 	int r = 0;

 	list_for_each_entry(pqn, &pqm->queues, process_queue_list) {
 		if (pqn->q) {
 			q = pqn->q;
 			switch (q->properties.type) {
 			case KFD_QUEUE_TYPE_SDMA:
 			case KFD_QUEUE_TYPE_SDMA_XGMI:
 				seq_printf(m, "  SDMA queue on device %x\n",
 					   q->device->id);
 				mqd_type = KFD_MQD_TYPE_SDMA;
 				break;
 			case KFD_QUEUE_TYPE_COMPUTE:
 				seq_printf(m, "  Compute queue on device %x\n",
 					   q->device->id);
 				mqd_type = KFD_MQD_TYPE_CP;
 				break;
 			default:
 				seq_printf(m,
 				"  Bad user queue type %d on device %x\n",
 					   q->properties.type, q->device->id);
 				continue;
 			}
 			mqd_mgr = q->device->dqm->mqd_mgrs[mqd_type];
 		} else if (pqn->kq) {
 			q = pqn->kq->queue;
 			mqd_mgr = pqn->kq->mqd_mgr;
 			switch (q->properties.type) {
 			case KFD_QUEUE_TYPE_DIQ:
 				seq_printf(m, "  DIQ on device %x\n",
 					   pqn->kq->dev->id);
 				break;
 			default:
 				seq_printf(m,
 				"  Bad kernel queue type %d on device %x\n",
 					   q->properties.type,
 					   pqn->kq->dev->id);
 				continue;
 			}
 		} else {
 			seq_printf(m,
 		"  Weird: Queue node with neither kernel nor user queue\n");
 			continue;
 		}

 		r = mqd_mgr->debugfs_show_mqd(m, q->mqd);
 		if (r != 0)
 			break;
 	}

 	return r;
 }

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

	#include <linux/slab.h>
	#include <linux/list.h>
	#include "kfd_device_queue_manager.h"
	#include "kfd_priv.h"
	#include "kfd_kernel_queue.h"
	#include "amdgpu_amdkfd.h"

	static inline struct process_queue_node *get_queue_by_qid(
	struct process_queue_manager *pqm, unsigned int qid)
	{
	struct process_queue_node *pqn;

	list_for_each_entry(pqn, &pqm->queues, process_queue_list) {
	if ((pqn->q && pqn->q->properties.queue_id == qid) \|\|
	(pqn->kq && pqn->kq->queue->properties.queue_id == qid))
	return pqn;
	}

	return NULL;
	}

	static int find_available_queue_slot(struct process_queue_manager *pqm,
	unsigned int *qid)
	{
	unsigned long found;

	found = find_first_zero_bit(pqm->queue_slot_bitmap,
	KFD_MAX_NUM_OF_QUEUES_PER_PROCESS);

	pr_debug("The new slot id %lu\n", found);

	if (found >= KFD_MAX_NUM_OF_QUEUES_PER_PROCESS) {
	pr_info("Cannot open more queues for process with pasid 0x%x\n",
	pqm->process->pasid);
	return -ENOMEM;
	}

	set_bit(found, pqm->queue_slot_bitmap);
	*qid = found;

	return 0;
	}

	void kfd_process_dequeue_from_device(struct kfd_process_device *pdd)
	{
	struct kfd_dev *dev = pdd->dev;

	if (pdd->already_dequeued)
	return;

	dev->dqm->ops.process_termination(dev->dqm, &pdd->qpd);
	pdd->already_dequeued = true;
	}

	int pqm_set_gws(struct process_queue_manager *pqm, unsigned int qid,
	void *gws)
	{
	struct kfd_dev *dev = NULL;
	struct process_queue_node *pqn;
	struct kfd_process_device *pdd;
	struct kgd_mem *mem = NULL;
	int ret;

	pqn = get_queue_by_qid(pqm, qid);
	if (!pqn) {
	pr_err("Queue id does not match any known queue\n");
	return -EINVAL;
	}

	if (pqn->q)
	dev = pqn->q->device;
	if (WARN_ON(!dev))
	return -ENODEV;

	pdd = kfd_get_process_device_data(dev, pqm->process);
	if (!pdd) {
	pr_err("Process device data doesn't exist\n");
	return -EINVAL;
	}

	/* Only allow one queue per process can have GWS assigned */
	if (gws && pdd->qpd.num_gws)
	return -EBUSY;

	if (!gws && pdd->qpd.num_gws == 0)
	return -EINVAL;

	if (gws)
	ret = amdgpu_amdkfd_add_gws_to_process(pdd->process->kgd_process_info,
	gws, &mem);
	else
	ret = amdgpu_amdkfd_remove_gws_from_process(pdd->process->kgd_process_info,
	pqn->q->gws);
	if (unlikely(ret))
	return ret;

	pqn->q->gws = mem;
	pdd->qpd.num_gws = gws ? amdgpu_amdkfd_get_num_gws(dev->kgd) : 0;

	return pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
	pqn->q);
	}

	void kfd_process_dequeue_from_all_devices(struct kfd_process *p)
	{
	struct kfd_process_device *pdd;

	list_for_each_entry(pdd, &p->per_device_data, per_device_list)
	kfd_process_dequeue_from_device(pdd);
	}

	int pqm_init(struct process_queue_manager pqm, struct kfd_process p)
	{
	INIT_LIST_HEAD(&pqm->queues);
	pqm->queue_slot_bitmap =
	kzalloc(DIV_ROUND_UP(KFD_MAX_NUM_OF_QUEUES_PER_PROCESS,
	BITS_PER_BYTE), GFP_KERNEL);
	if (!pqm->queue_slot_bitmap)
	return -ENOMEM;
	pqm->process = p;

	return 0;
	}

	void pqm_uninit(struct process_queue_manager *pqm)
	{
	struct process_queue_node pqn, next;

	list_for_each_entry_safe(pqn, next, &pqm->queues, process_queue_list) {
	if (pqn->q && pqn->q->gws)
	amdgpu_amdkfd_remove_gws_from_process(pqm->process->kgd_process_info,
	pqn->q->gws);
	uninit_queue(pqn->q);
	list_del(&pqn->process_queue_list);
	kfree(pqn);
	}

	kfree(pqm->queue_slot_bitmap);
	pqm->queue_slot_bitmap = NULL;
	}

	static int init_user_queue(struct process_queue_manager *pqm,
	struct kfd_dev dev, struct queue *q,
	struct queue_properties *q_properties,
	struct file *f, unsigned int qid)
	{
	int retval;

	/* Doorbell initialized in user space*/
	q_properties->doorbell_ptr = NULL;

	/* let DQM handle it*/
	q_properties->vmid = 0;
	q_properties->queue_id = qid;

	retval = init_queue(q, q_properties);
	if (retval != 0)
	return retval;

	(*q)->device = dev;
	(*q)->process = pqm->process;

	pr_debug("PQM After init queue");

	return retval;
	}

	int pqm_create_queue(struct process_queue_manager *pqm,
	struct kfd_dev *dev,
	struct file *f,
	struct queue_properties *properties,
	unsigned int *qid,
	uint32_t *p_doorbell_offset_in_process)
	{
	int retval;
	struct kfd_process_device *pdd;
	struct queue *q;
	struct process_queue_node *pqn;
	struct kernel_queue *kq;
	enum kfd_queue_type type = properties->type;
	unsigned int max_queues = 127; /* HWS limit */

	q = NULL;
	kq = NULL;

	pdd = kfd_get_process_device_data(dev, pqm->process);
	if (!pdd) {
	pr_err("Process device data doesn't exist\n");
	return -1;
	}

	/*
	* for debug process, verify that it is within the static queues limit
	* currently limit is set to half of the total avail HQD slots
	* If we are just about to create DIQ, the is_debug flag is not set yet
	* Hence we also check the type as well
	*/
	if ((pdd->qpd.is_debug) \|\| (type == KFD_QUEUE_TYPE_DIQ))
	max_queues = dev->device_info->max_no_of_hqd/2;

	if (pdd->qpd.queue_count >= max_queues)
	return -ENOSPC;

	retval = find_available_queue_slot(pqm, qid);
	if (retval != 0)
	return retval;

	if (list_empty(&pdd->qpd.queues_list) &&
	list_empty(&pdd->qpd.priv_queue_list))
	dev->dqm->ops.register_process(dev->dqm, &pdd->qpd);

	pqn = kzalloc(sizeof(*pqn), GFP_KERNEL);
	if (!pqn) {
	retval = -ENOMEM;
	goto err_allocate_pqn;
	}

	switch (type) {
	case KFD_QUEUE_TYPE_SDMA:
	case KFD_QUEUE_TYPE_SDMA_XGMI:
	if ((type == KFD_QUEUE_TYPE_SDMA && dev->dqm->sdma_queue_count
	>= get_num_sdma_queues(dev->dqm)) \|\|
	(type == KFD_QUEUE_TYPE_SDMA_XGMI &&
	dev->dqm->xgmi_sdma_queue_count
	>= get_num_xgmi_sdma_queues(dev->dqm))) {
	pr_debug("Over-subscription is not allowed for SDMA.\n");
	retval = -EPERM;
	goto err_create_queue;
	}

	retval = init_user_queue(pqm, dev, &q, properties, f, *qid);
	if (retval != 0)
	goto err_create_queue;
	pqn->q = q;
	pqn->kq = NULL;
	retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd);
	pr_debug("DQM returned %d for create_queue\n", retval);
	print_queue(q);
	break;

	case KFD_QUEUE_TYPE_COMPUTE:
	/* check if there is over subscription */
	if ((dev->dqm->sched_policy ==
	KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION) &&
	((dev->dqm->processes_count >= dev->vm_info.vmid_num_kfd) \|\|
	(dev->dqm->queue_count >= get_queues_num(dev->dqm)))) {
	pr_debug("Over-subscription is not allowed when amdkfd.sched_policy == 1\n");
	retval = -EPERM;
	goto err_create_queue;
	}

	retval = init_user_queue(pqm, dev, &q, properties, f, *qid);
	if (retval != 0)
	goto err_create_queue;
	pqn->q = q;
	pqn->kq = NULL;
	retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd);
	pr_debug("DQM returned %d for create_queue\n", retval);
	print_queue(q);
	break;
	case KFD_QUEUE_TYPE_DIQ:
	kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_DIQ);
	if (!kq) {
	retval = -ENOMEM;
	goto err_create_queue;
	}
	kq->queue->properties.queue_id = *qid;
	pqn->kq = kq;
	pqn->q = NULL;
	retval = dev->dqm->ops.create_kernel_queue(dev->dqm,
	kq, &pdd->qpd);
	break;
	default:
	WARN(1, "Invalid queue type %d", type);
	retval = -EINVAL;
	}

	if (retval != 0) {
	pr_err("Pasid 0x%x DQM create queue %d failed. ret %d\n",
	pqm->process->pasid, type, retval);
	goto err_create_queue;
	}

	if (q && p_doorbell_offset_in_process)
	/* Return the doorbell offset within the doorbell page
	* to the caller so it can be passed up to user mode
	* (in bytes).
	* There are always 1024 doorbells per process, so in case
	* of 8-byte doorbells, there are two doorbell pages per
	* process.
	*/
	*p_doorbell_offset_in_process =
	(q->properties.doorbell_off * sizeof(uint32_t)) &
	(kfd_doorbell_process_slice(dev) - 1);

	pr_debug("PQM After DQM create queue\n");

	list_add(&pqn->process_queue_list, &pqm->queues);

	if (q) {
	pr_debug("PQM done creating queue\n");
	print_queue_properties(&q->properties);
	}

	return retval;

	err_create_queue:
	kfree(pqn);
	err_allocate_pqn:
	/* check if queues list is empty unregister process from device */
	clear_bit(*qid, pqm->queue_slot_bitmap);
	if (list_empty(&pdd->qpd.queues_list) &&
	list_empty(&pdd->qpd.priv_queue_list))
	dev->dqm->ops.unregister_process(dev->dqm, &pdd->qpd);
	return retval;
	}

	int pqm_destroy_queue(struct process_queue_manager *pqm, unsigned int qid)
	{
	struct process_queue_node *pqn;
	struct kfd_process_device *pdd;
	struct device_queue_manager *dqm;
	struct kfd_dev *dev;
	int retval;

	dqm = NULL;

	retval = 0;

	pqn = get_queue_by_qid(pqm, qid);
	if (!pqn) {
	pr_err("Queue id does not match any known queue\n");
	return -EINVAL;
	}

	dev = NULL;
	if (pqn->kq)
	dev = pqn->kq->dev;
	if (pqn->q)
	dev = pqn->q->device;
	if (WARN_ON(!dev))
	return -ENODEV;

	pdd = kfd_get_process_device_data(dev, pqm->process);
	if (!pdd) {
	pr_err("Process device data doesn't exist\n");
	return -1;
	}

	if (pqn->kq) {
	/* destroy kernel queue (DIQ) */
	dqm = pqn->kq->dev->dqm;
	dqm->ops.destroy_kernel_queue(dqm, pqn->kq, &pdd->qpd);
	kernel_queue_uninit(pqn->kq, false);
	}

	if (pqn->q) {
	dqm = pqn->q->device->dqm;
	retval = dqm->ops.destroy_queue(dqm, &pdd->qpd, pqn->q);
	if (retval) {
	pr_err("Pasid 0x%x destroy queue %d failed, ret %d\n",
	pqm->process->pasid,
	pqn->q->properties.queue_id, retval);
	if (retval != -ETIME)
	goto err_destroy_queue;
	}

	if (pqn->q->gws) {
	amdgpu_amdkfd_remove_gws_from_process(pqm->process->kgd_process_info,
	pqn->q->gws);
	pdd->qpd.num_gws = 0;
	}

	kfree(pqn->q->properties.cu_mask);
	pqn->q->properties.cu_mask = NULL;
	uninit_queue(pqn->q);
	}

	list_del(&pqn->process_queue_list);
	kfree(pqn);
	clear_bit(qid, pqm->queue_slot_bitmap);

	if (list_empty(&pdd->qpd.queues_list) &&
	list_empty(&pdd->qpd.priv_queue_list))
	dqm->ops.unregister_process(dqm, &pdd->qpd);

	err_destroy_queue:
	return retval;
	}

	int pqm_update_queue(struct process_queue_manager *pqm, unsigned int qid,
	struct queue_properties *p)
	{
	int retval;
	struct process_queue_node *pqn;

	pqn = get_queue_by_qid(pqm, qid);
	if (!pqn) {
	pr_debug("No queue %d exists for update operation\n", qid);
	return -EFAULT;
	}

	pqn->q->properties.queue_address = p->queue_address;
	pqn->q->properties.queue_size = p->queue_size;
	pqn->q->properties.queue_percent = p->queue_percent;
	pqn->q->properties.priority = p->priority;

	retval = pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
	pqn->q);
	if (retval != 0)
	return retval;

	return 0;
	}

	int pqm_set_cu_mask(struct process_queue_manager *pqm, unsigned int qid,
	struct queue_properties *p)
	{
	int retval;
	struct process_queue_node *pqn;

	pqn = get_queue_by_qid(pqm, qid);
	if (!pqn) {
	pr_debug("No queue %d exists for update operation\n", qid);
	return -EFAULT;
	}

	/* Free the old CU mask memory if it is already allocated, then
	* allocate memory for the new CU mask.
	*/
	kfree(pqn->q->properties.cu_mask);

	pqn->q->properties.cu_mask_count = p->cu_mask_count;
	pqn->q->properties.cu_mask = p->cu_mask;

	retval = pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
	pqn->q);
	if (retval != 0)
	return retval;

	return 0;
	}

	struct kernel_queue *pqm_get_kernel_queue(
	struct process_queue_manager *pqm,
	unsigned int qid)
	{
	struct process_queue_node *pqn;

	pqn = get_queue_by_qid(pqm, qid);
	if (pqn && pqn->kq)
	return pqn->kq;

	return NULL;
	}

	int pqm_get_wave_state(struct process_queue_manager *pqm,
	unsigned int qid,
	void __user *ctl_stack,
	u32 *ctl_stack_used_size,
	u32 *save_area_used_size)
	{
	struct process_queue_node *pqn;

	pqn = get_queue_by_qid(pqm, qid);
	if (!pqn) {
	pr_debug("amdkfd: No queue %d exists for operation\n",
	qid);
	return -EFAULT;
	}

	return pqn->q->device->dqm->ops.get_wave_state(pqn->q->device->dqm,
	pqn->q,
	ctl_stack,
	ctl_stack_used_size,
	save_area_used_size);
	}

	#if defined(CONFIG_DEBUG_FS)

	int pqm_debugfs_mqds(struct seq_file m, void data)
	{
	struct process_queue_manager *pqm = data;
	struct process_queue_node *pqn;
	struct queue *q;
	enum KFD_MQD_TYPE mqd_type;
	struct mqd_manager *mqd_mgr;
	int r = 0;

	list_for_each_entry(pqn, &pqm->queues, process_queue_list) {
	if (pqn->q) {
	q = pqn->q;
	switch (q->properties.type) {
	case KFD_QUEUE_TYPE_SDMA:
	case KFD_QUEUE_TYPE_SDMA_XGMI:
	seq_printf(m, " SDMA queue on device %x\n",
	q->device->id);
	mqd_type = KFD_MQD_TYPE_SDMA;
	break;
	case KFD_QUEUE_TYPE_COMPUTE:
	seq_printf(m, " Compute queue on device %x\n",
	q->device->id);
	mqd_type = KFD_MQD_TYPE_CP;
	break;
	default:
	seq_printf(m,
	" Bad user queue type %d on device %x\n",
	q->properties.type, q->device->id);
	continue;
	}
	mqd_mgr = q->device->dqm->mqd_mgrs[mqd_type];
	} else if (pqn->kq) {
	q = pqn->kq->queue;
	mqd_mgr = pqn->kq->mqd_mgr;
	switch (q->properties.type) {
	case KFD_QUEUE_TYPE_DIQ:
	seq_printf(m, " DIQ on device %x\n",
	pqn->kq->dev->id);
	break;
	default:
	seq_printf(m,
	" Bad kernel queue type %d on device %x\n",
	q->properties.type,
	pqn->kq->dev->id);
	continue;
	}
	} else {
	seq_printf(m,
	" Weird: Queue node with neither kernel nor user queue\n");
	continue;
	}

	r = mqd_mgr->debugfs_show_mqd(m, q->mqd);
	if (r != 0)
	break;
	}

	return r;
	}

	#endif