/*
* 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 %d\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 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;
/* 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)
{
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 = create_cp_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 = create_cp_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 %d DQM create queue %d failed. ret %d\n",
pqm->process->pasid, type, retval);
goto err_create_queue;
}
if (q)
/* Return the doorbell offset within the doorbell page
* to the caller so it can be passed up to user mode
* (in bytes).
*/
properties->doorbell_off =
(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);
}
if (pqn->q) {
dqm = pqn->q->device->dqm;
retval = dqm->ops.destroy_queue(dqm, &pdd->qpd, pqn->q);
if (retval) {
pr_err("Pasid %d 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
