2 * Copyright 2014 Advanced Micro Devices, Inc.
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
24 #include <linux/slab.h>
25 #include <linux/list.h>
26 #include "kfd_device_queue_manager.h"
28 #include "kfd_kernel_queue.h"
30 static inline struct process_queue_node *get_queue_by_qid(
31 struct process_queue_manager *pqm, unsigned int qid)
33 struct process_queue_node *pqn;
35 list_for_each_entry(pqn, &pqm->queues, process_queue_list) {
36 if ((pqn->q && pqn->q->properties.queue_id == qid) ||
37 (pqn->kq && pqn->kq->queue->properties.queue_id == qid))
44 static int find_available_queue_slot(struct process_queue_manager *pqm,
49 found = find_first_zero_bit(pqm->queue_slot_bitmap,
50 KFD_MAX_NUM_OF_QUEUES_PER_PROCESS);
52 pr_debug("The new slot id %lu\n", found);
54 if (found >= KFD_MAX_NUM_OF_QUEUES_PER_PROCESS) {
55 pr_info("Cannot open more queues for process with pasid %d\n",
60 set_bit(found, pqm->queue_slot_bitmap);
66 void kfd_process_dequeue_from_device(struct kfd_process_device *pdd)
68 struct kfd_dev *dev = pdd->dev;
70 if (pdd->already_dequeued)
73 dev->dqm->ops.process_termination(dev->dqm, &pdd->qpd);
74 pdd->already_dequeued = true;
77 void kfd_process_dequeue_from_all_devices(struct kfd_process *p)
79 struct kfd_process_device *pdd;
81 list_for_each_entry(pdd, &p->per_device_data, per_device_list)
82 kfd_process_dequeue_from_device(pdd);
85 int pqm_init(struct process_queue_manager *pqm, struct kfd_process *p)
87 INIT_LIST_HEAD(&pqm->queues);
88 pqm->queue_slot_bitmap =
89 kzalloc(DIV_ROUND_UP(KFD_MAX_NUM_OF_QUEUES_PER_PROCESS,
90 BITS_PER_BYTE), GFP_KERNEL);
91 if (!pqm->queue_slot_bitmap)
98 void pqm_uninit(struct process_queue_manager *pqm)
100 struct process_queue_node *pqn, *next;
102 list_for_each_entry_safe(pqn, next, &pqm->queues, process_queue_list) {
103 uninit_queue(pqn->q);
104 list_del(&pqn->process_queue_list);
108 kfree(pqm->queue_slot_bitmap);
109 pqm->queue_slot_bitmap = NULL;
112 static int create_cp_queue(struct process_queue_manager *pqm,
113 struct kfd_dev *dev, struct queue **q,
114 struct queue_properties *q_properties,
115 struct file *f, unsigned int qid)
119 /* Doorbell initialized in user space*/
120 q_properties->doorbell_ptr = NULL;
122 q_properties->doorbell_off =
123 kfd_queue_id_to_doorbell(dev, pqm->process, qid);
125 /* let DQM handle it*/
126 q_properties->vmid = 0;
127 q_properties->queue_id = qid;
129 retval = init_queue(q, q_properties);
134 (*q)->process = pqm->process;
136 pr_debug("PQM After init queue");
141 int pqm_create_queue(struct process_queue_manager *pqm,
144 struct queue_properties *properties,
148 struct kfd_process_device *pdd;
150 struct process_queue_node *pqn;
151 struct kernel_queue *kq;
152 enum kfd_queue_type type = properties->type;
153 unsigned int max_queues = 127; /* HWS limit */
158 pdd = kfd_get_process_device_data(dev, pqm->process);
160 pr_err("Process device data doesn't exist\n");
165 * for debug process, verify that it is within the static queues limit
166 * currently limit is set to half of the total avail HQD slots
167 * If we are just about to create DIQ, the is_debug flag is not set yet
168 * Hence we also check the type as well
170 if ((pdd->qpd.is_debug) || (type == KFD_QUEUE_TYPE_DIQ))
171 max_queues = dev->device_info->max_no_of_hqd/2;
173 if (pdd->qpd.queue_count >= max_queues)
176 retval = find_available_queue_slot(pqm, qid);
180 if (list_empty(&pdd->qpd.queues_list) &&
181 list_empty(&pdd->qpd.priv_queue_list)) {
183 dev->dqm->ops.register_process(dev->dqm, &pdd->qpd);
186 pqn = kzalloc(sizeof(*pqn), GFP_KERNEL);
189 goto err_allocate_pqn;
193 case KFD_QUEUE_TYPE_SDMA:
194 if (dev->dqm->queue_count >=
195 CIK_SDMA_QUEUES_PER_ENGINE * CIK_SDMA_ENGINE_NUM) {
196 pr_err("Over-subscription is not allowed for SDMA.\n");
198 goto err_create_queue;
201 retval = create_cp_queue(pqm, dev, &q, properties, f, *qid);
203 goto err_create_queue;
206 retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd,
207 &q->properties.vmid);
208 pr_debug("DQM returned %d for create_queue\n", retval);
212 case KFD_QUEUE_TYPE_COMPUTE:
213 /* check if there is over subscription */
214 if ((sched_policy == KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION) &&
215 ((dev->dqm->processes_count >= dev->vm_info.vmid_num_kfd) ||
216 (dev->dqm->queue_count >= get_queues_num(dev->dqm)))) {
217 pr_err("Over-subscription is not allowed in radeon_kfd.sched_policy == 1\n");
219 goto err_create_queue;
222 retval = create_cp_queue(pqm, dev, &q, properties, f, *qid);
224 goto err_create_queue;
227 retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd,
228 &q->properties.vmid);
229 pr_debug("DQM returned %d for create_queue\n", retval);
232 case KFD_QUEUE_TYPE_DIQ:
233 kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_DIQ);
236 goto err_create_queue;
238 kq->queue->properties.queue_id = *qid;
241 retval = dev->dqm->ops.create_kernel_queue(dev->dqm,
245 WARN(1, "Invalid queue type %d", type);
250 pr_err("DQM create queue failed\n");
251 goto err_create_queue;
254 pr_debug("PQM After DQM create queue\n");
256 list_add(&pqn->process_queue_list, &pqm->queues);
259 pr_debug("PQM done creating queue\n");
260 print_queue_properties(&q->properties);
268 /* check if queues list is empty unregister process from device */
269 clear_bit(*qid, pqm->queue_slot_bitmap);
270 if (list_empty(&pdd->qpd.queues_list) &&
271 list_empty(&pdd->qpd.priv_queue_list))
272 dev->dqm->ops.unregister_process(dev->dqm, &pdd->qpd);
276 int pqm_destroy_queue(struct process_queue_manager *pqm, unsigned int qid)
278 struct process_queue_node *pqn;
279 struct kfd_process_device *pdd;
280 struct device_queue_manager *dqm;
288 pqn = get_queue_by_qid(pqm, qid);
290 pr_err("Queue id does not match any known queue\n");
298 dev = pqn->q->device;
302 pdd = kfd_get_process_device_data(dev, pqm->process);
304 pr_err("Process device data doesn't exist\n");
309 /* destroy kernel queue (DIQ) */
310 dqm = pqn->kq->dev->dqm;
311 dqm->ops.destroy_kernel_queue(dqm, pqn->kq, &pdd->qpd);
312 kernel_queue_uninit(pqn->kq);
316 dqm = pqn->q->device->dqm;
317 retval = dqm->ops.destroy_queue(dqm, &pdd->qpd, pqn->q);
318 uninit_queue(pqn->q);
321 list_del(&pqn->process_queue_list);
323 clear_bit(qid, pqm->queue_slot_bitmap);
325 if (list_empty(&pdd->qpd.queues_list) &&
326 list_empty(&pdd->qpd.priv_queue_list))
327 dqm->ops.unregister_process(dqm, &pdd->qpd);
332 int pqm_update_queue(struct process_queue_manager *pqm, unsigned int qid,
333 struct queue_properties *p)
336 struct process_queue_node *pqn;
338 pqn = get_queue_by_qid(pqm, qid);
340 pr_debug("No queue %d exists for update operation\n", qid);
344 pqn->q->properties.queue_address = p->queue_address;
345 pqn->q->properties.queue_size = p->queue_size;
346 pqn->q->properties.queue_percent = p->queue_percent;
347 pqn->q->properties.priority = p->priority;
349 retval = pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
357 struct kernel_queue *pqm_get_kernel_queue(
358 struct process_queue_manager *pqm,
361 struct process_queue_node *pqn;
363 pqn = get_queue_by_qid(pqm, qid);