Release 4.11 drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c
/*
* Copyright 2014 Advanced Micro Devices, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
*/
#include <linux/slab.h>
#include <linux/list.h>
#include "kfd_device_queue_manager.h"
#include "kfd_priv.h"
#include "kfd_kernel_queue.h"
static inline struct process_queue_node *get_queue_by_qid(
struct process_queue_manager *pqm, unsigned int qid)
{
struct process_queue_node *pqn;
BUG_ON(!pqm);
list_for_each_entry(pqn, &pqm->queues, process_queue_list) {
if (pqn->q && pqn->q->properties.queue_id == qid)
return pqn;
if (pqn->kq && pqn->kq->queue->properties.queue_id == qid)
return pqn;
}
return NULL;
}
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static int find_available_queue_slot(struct process_queue_manager *pqm,
unsigned int *qid)
{
unsigned long found;
BUG_ON(!pqm || !qid);
pr_debug("kfd: in %s\n", __func__);
found = find_first_zero_bit(pqm->queue_slot_bitmap,
KFD_MAX_NUM_OF_QUEUES_PER_PROCESS);
pr_debug("kfd: the new slot id %lu\n", found);
if (found >= KFD_MAX_NUM_OF_QUEUES_PER_PROCESS) {
pr_info("amdkfd: Can not open more queues for process with pasid %d\n",
pqm->process->pasid);
return -ENOMEM;
}
set_bit(found, pqm->queue_slot_bitmap);
*qid = found;
return 0;
}
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int pqm_init(struct process_queue_manager *pqm, struct kfd_process *p)
{
BUG_ON(!pqm);
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 == NULL)
return -ENOMEM;
pqm->process = p;
return 0;
}
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void pqm_uninit(struct process_queue_manager *pqm)
{
int retval;
struct process_queue_node *pqn, *next;
BUG_ON(!pqm);
pr_debug("In func %s\n", __func__);
list_for_each_entry_safe(pqn, next, &pqm->queues, process_queue_list) {
retval = pqm_destroy_queue(
pqm,
(pqn->q != NULL) ?
pqn->q->properties.queue_id :
pqn->kq->queue->properties.queue_id);
if (retval != 0) {
pr_err("kfd: failed to destroy queue\n");
return;
}
}
kfree(pqm->queue_slot_bitmap);
pqm->queue_slot_bitmap = NULL;
}
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static int create_cp_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;
retval = 0;
/* Doorbell initialized in user space*/
q_properties->doorbell_ptr = NULL;
q_properties->doorbell_off =
kfd_queue_id_to_doorbell(dev, pqm->process, qid);
/* let DQM handle it*/
q_properties->vmid = 0;
q_properties->queue_id = qid;
retval = init_queue(q, q_properties);
if (retval != 0)
goto err_init_queue;
(*q)->device = dev;
(*q)->process = pqm->process;
pr_debug("kfd: PQM After init queue");
return retval;
err_init_queue:
return retval;
}
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int pqm_create_queue(struct process_queue_manager *pqm,
struct kfd_dev *dev,
struct file *f,
struct queue_properties *properties,
unsigned int flags,
enum kfd_queue_type type,
unsigned int *qid)
{
int retval;
struct kfd_process_device *pdd;
struct queue_properties q_properties;
struct queue *q;
struct process_queue_node *pqn;
struct kernel_queue *kq;
int num_queues = 0;
struct queue *cur;
BUG_ON(!pqm || !dev || !properties || !qid);
memset(&q_properties, 0, sizeof(struct queue_properties));
memcpy(&q_properties, properties, sizeof(struct queue_properties));
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)) {
list_for_each_entry(cur, &pdd->qpd.queues_list, list)
num_queues++;
if (num_queues >= dev->device_info->max_no_of_hqd/2)
return (-ENOSPC);
}
retval = find_available_queue_slot(pqm, qid);
if (retval != 0)
return retval;
if (list_empty(&pqm->queues)) {
pdd->qpd.pqm = pqm;
dev->dqm->ops.register_process(dev->dqm, &pdd->qpd);
}
pqn = kzalloc(sizeof(struct process_queue_node), GFP_KERNEL);
if (!pqn) {
retval = -ENOMEM;
goto err_allocate_pqn;
}
switch (type) {
case KFD_QUEUE_TYPE_SDMA:
case KFD_QUEUE_TYPE_COMPUTE:
/* check if there is over subscription */
if ((sched_policy == KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION) &&
((dev->dqm->processes_count >= VMID_PER_DEVICE) ||
(dev->dqm->queue_count >= PIPE_PER_ME_CP_SCHEDULING * QUEUES_PER_PIPE))) {
pr_err("kfd: over-subscription is not allowed in radeon_kfd.sched_policy == 1\n");
retval = -EPERM;
goto err_create_queue;
}
retval = create_cp_queue(pqm, dev, &q, &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,
&q->properties.vmid);
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 == NULL) {
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:
BUG();
break;
}
if (retval != 0) {
pr_debug("Error dqm create queue\n");
goto err_create_queue;
}
pr_debug("kfd: PQM After DQM create queue\n");
list_add(&pqn->process_queue_list, &pqm->queues);
if (q) {
*properties = q->properties;
pr_debug("kfd: PQM done creating queue\n");
print_queue_properties(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(&pqm->queues))
dev->dqm->ops.unregister_process(dev->dqm, &pdd->qpd);
return retval;
}
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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;
BUG_ON(!pqm);
retval = 0;
pr_debug("kfd: In Func %s\n", __func__);
pqn = get_queue_by_qid(pqm, qid);
if (pqn == NULL) {
pr_err("kfd: 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;
BUG_ON(!dev);
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);
}
if (pqn->q) {
dqm = pqn->q->device->dqm;
retval = dqm->ops.destroy_queue(dqm, &pdd->qpd, pqn->q);
if (retval != 0)
return retval;
uninit_queue(pqn->q);
}
list_del(&pqn->process_queue_list);
kfree(pqn);
clear_bit(qid, pqm->queue_slot_bitmap);
if (list_empty(&pqm->queues))
dqm->ops.unregister_process(dqm, &pdd->qpd);
return retval;
}
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int pqm_update_queue(struct process_queue_manager *pqm, unsigned int qid,
struct queue_properties *p)
{
int retval;
struct process_queue_node *pqn;
BUG_ON(!pqm);
pqn = get_queue_by_qid(pqm, qid);
if (!pqn) {
pr_debug("amdkfd: 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;
}
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struct kernel_queue *pqm_get_kernel_queue(
struct process_queue_manager *pqm,
unsigned int qid)
{
struct process_queue_node *pqn;
BUG_ON(!pqm);
pqn = get_queue_by_qid(pqm, qid);
if (pqn && pqn->kq)
return pqn->kq;
return NULL;
}
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