1 /*
2 * Copyright 2014 Advanced Micro Devices, Inc.
3 *
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:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
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.
21 *
22 */
23
24 #include <linux/slab.h>
25 #include <linux/list.h>
26 #include "kfd_device_queue_manager.h"
27 #include "kfd_priv.h"
28 #include "kfd_kernel_queue.h"
29 #include "amdgpu_amdkfd.h"
30
get_queue_by_qid(struct process_queue_manager * pqm,unsigned int qid)31 static inline struct process_queue_node *get_queue_by_qid(
32 struct process_queue_manager *pqm, unsigned int qid)
33 {
34 struct process_queue_node *pqn;
35
36 list_for_each_entry(pqn, &pqm->queues, process_queue_list) {
37 if ((pqn->q && pqn->q->properties.queue_id == qid) ||
38 (pqn->kq && pqn->kq->queue->properties.queue_id == qid))
39 return pqn;
40 }
41
42 return NULL;
43 }
44
find_available_queue_slot(struct process_queue_manager * pqm,unsigned int * qid)45 static int find_available_queue_slot(struct process_queue_manager *pqm,
46 unsigned int *qid)
47 {
48 unsigned long found;
49
50 found = find_first_zero_bit(pqm->queue_slot_bitmap,
51 KFD_MAX_NUM_OF_QUEUES_PER_PROCESS);
52
53 pr_debug("The new slot id %lu\n", found);
54
55 if (found >= KFD_MAX_NUM_OF_QUEUES_PER_PROCESS) {
56 pr_info("Cannot open more queues for process with pasid 0x%x\n",
57 pqm->process->pasid);
58 return -ENOMEM;
59 }
60
61 set_bit(found, pqm->queue_slot_bitmap);
62 *qid = found;
63
64 return 0;
65 }
66
kfd_process_dequeue_from_device(struct kfd_process_device * pdd)67 void kfd_process_dequeue_from_device(struct kfd_process_device *pdd)
68 {
69 struct kfd_dev *dev = pdd->dev;
70
71 if (pdd->already_dequeued)
72 return;
73
74 dev->dqm->ops.process_termination(dev->dqm, &pdd->qpd);
75 pdd->already_dequeued = true;
76 }
77
pqm_set_gws(struct process_queue_manager * pqm,unsigned int qid,void * gws)78 int pqm_set_gws(struct process_queue_manager *pqm, unsigned int qid,
79 void *gws)
80 {
81 struct kfd_dev *dev = NULL;
82 struct process_queue_node *pqn;
83 struct kfd_process_device *pdd;
84 struct kgd_mem *mem = NULL;
85 int ret;
86
87 pqn = get_queue_by_qid(pqm, qid);
88 if (!pqn) {
89 pr_err("Queue id does not match any known queue\n");
90 return -EINVAL;
91 }
92
93 if (pqn->q)
94 dev = pqn->q->device;
95 if (WARN_ON(!dev))
96 return -ENODEV;
97
98 pdd = kfd_get_process_device_data(dev, pqm->process);
99 if (!pdd) {
100 pr_err("Process device data doesn't exist\n");
101 return -EINVAL;
102 }
103
104 /* Only allow one queue per process can have GWS assigned */
105 if (gws && pdd->qpd.num_gws)
106 return -EBUSY;
107
108 if (!gws && pdd->qpd.num_gws == 0)
109 return -EINVAL;
110
111 if (gws)
112 ret = amdgpu_amdkfd_add_gws_to_process(pdd->process->kgd_process_info,
113 gws, &mem);
114 else
115 ret = amdgpu_amdkfd_remove_gws_from_process(pdd->process->kgd_process_info,
116 pqn->q->gws);
117 if (unlikely(ret))
118 return ret;
119
120 pqn->q->gws = mem;
121 pdd->qpd.num_gws = gws ? amdgpu_amdkfd_get_num_gws(dev->kgd) : 0;
122
123 return pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
124 pqn->q);
125 }
126
kfd_process_dequeue_from_all_devices(struct kfd_process * p)127 void kfd_process_dequeue_from_all_devices(struct kfd_process *p)
128 {
129 struct kfd_process_device *pdd;
130
131 list_for_each_entry(pdd, &p->per_device_data, per_device_list)
132 kfd_process_dequeue_from_device(pdd);
133 }
134
pqm_init(struct process_queue_manager * pqm,struct kfd_process * p)135 int pqm_init(struct process_queue_manager *pqm, struct kfd_process *p)
136 {
137 INIT_LIST_HEAD(&pqm->queues);
138 pqm->queue_slot_bitmap =
139 kzalloc(DIV_ROUND_UP(KFD_MAX_NUM_OF_QUEUES_PER_PROCESS,
140 BITS_PER_BYTE), GFP_KERNEL);
141 if (!pqm->queue_slot_bitmap)
142 return -ENOMEM;
143 pqm->process = p;
144
145 return 0;
146 }
147
pqm_uninit(struct process_queue_manager * pqm)148 void pqm_uninit(struct process_queue_manager *pqm)
149 {
150 struct process_queue_node *pqn, *next;
151
152 list_for_each_entry_safe(pqn, next, &pqm->queues, process_queue_list) {
153 if (pqn->q && pqn->q->gws)
154 amdgpu_amdkfd_remove_gws_from_process(pqm->process->kgd_process_info,
155 pqn->q->gws);
156 kfd_procfs_del_queue(pqn->q);
157 uninit_queue(pqn->q);
158 list_del(&pqn->process_queue_list);
159 kfree(pqn);
160 }
161
162 kfree(pqm->queue_slot_bitmap);
163 pqm->queue_slot_bitmap = NULL;
164 }
165
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)166 static int init_user_queue(struct process_queue_manager *pqm,
167 struct kfd_dev *dev, struct queue **q,
168 struct queue_properties *q_properties,
169 struct file *f, unsigned int qid)
170 {
171 int retval;
172
173 /* Doorbell initialized in user space*/
174 q_properties->doorbell_ptr = NULL;
175
176 /* let DQM handle it*/
177 q_properties->vmid = 0;
178 q_properties->queue_id = qid;
179
180 retval = init_queue(q, q_properties);
181 if (retval != 0)
182 return retval;
183
184 (*q)->device = dev;
185 (*q)->process = pqm->process;
186
187 pr_debug("PQM After init queue");
188
189 return retval;
190 }
191
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)192 int pqm_create_queue(struct process_queue_manager *pqm,
193 struct kfd_dev *dev,
194 struct file *f,
195 struct queue_properties *properties,
196 unsigned int *qid,
197 uint32_t *p_doorbell_offset_in_process)
198 {
199 int retval;
200 struct kfd_process_device *pdd;
201 struct queue *q;
202 struct process_queue_node *pqn;
203 struct kernel_queue *kq;
204 enum kfd_queue_type type = properties->type;
205 unsigned int max_queues = 127; /* HWS limit */
206
207 q = NULL;
208 kq = NULL;
209
210 pdd = kfd_get_process_device_data(dev, pqm->process);
211 if (!pdd) {
212 pr_err("Process device data doesn't exist\n");
213 return -1;
214 }
215
216 /*
217 * for debug process, verify that it is within the static queues limit
218 * currently limit is set to half of the total avail HQD slots
219 * If we are just about to create DIQ, the is_debug flag is not set yet
220 * Hence we also check the type as well
221 */
222 if ((pdd->qpd.is_debug) || (type == KFD_QUEUE_TYPE_DIQ))
223 max_queues = dev->device_info->max_no_of_hqd/2;
224
225 if (pdd->qpd.queue_count >= max_queues)
226 return -ENOSPC;
227
228 retval = find_available_queue_slot(pqm, qid);
229 if (retval != 0)
230 return retval;
231
232 if (list_empty(&pdd->qpd.queues_list) &&
233 list_empty(&pdd->qpd.priv_queue_list))
234 dev->dqm->ops.register_process(dev->dqm, &pdd->qpd);
235
236 pqn = kzalloc(sizeof(*pqn), GFP_KERNEL);
237 if (!pqn) {
238 retval = -ENOMEM;
239 goto err_allocate_pqn;
240 }
241
242 switch (type) {
243 case KFD_QUEUE_TYPE_SDMA:
244 case KFD_QUEUE_TYPE_SDMA_XGMI:
245 /* SDMA queues are always allocated statically no matter
246 * which scheduler mode is used. We also do not need to
247 * check whether a SDMA queue can be allocated here, because
248 * allocate_sdma_queue() in create_queue() has the
249 * corresponding check logic.
250 */
251 retval = init_user_queue(pqm, dev, &q, properties, f, *qid);
252 if (retval != 0)
253 goto err_create_queue;
254 pqn->q = q;
255 pqn->kq = NULL;
256 retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd);
257 print_queue(q);
258 break;
259
260 case KFD_QUEUE_TYPE_COMPUTE:
261 /* check if there is over subscription */
262 if ((dev->dqm->sched_policy ==
263 KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION) &&
264 ((dev->dqm->processes_count >= dev->vm_info.vmid_num_kfd) ||
265 (dev->dqm->active_queue_count >= get_cp_queues_num(dev->dqm)))) {
266 pr_debug("Over-subscription is not allowed when amdkfd.sched_policy == 1\n");
267 retval = -EPERM;
268 goto err_create_queue;
269 }
270
271 retval = init_user_queue(pqm, dev, &q, properties, f, *qid);
272 if (retval != 0)
273 goto err_create_queue;
274 pqn->q = q;
275 pqn->kq = NULL;
276 retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd);
277 print_queue(q);
278 break;
279 case KFD_QUEUE_TYPE_DIQ:
280 kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_DIQ);
281 if (!kq) {
282 retval = -ENOMEM;
283 goto err_create_queue;
284 }
285 kq->queue->properties.queue_id = *qid;
286 pqn->kq = kq;
287 pqn->q = NULL;
288 retval = dev->dqm->ops.create_kernel_queue(dev->dqm,
289 kq, &pdd->qpd);
290 break;
291 default:
292 WARN(1, "Invalid queue type %d", type);
293 retval = -EINVAL;
294 }
295
296 if (retval != 0) {
297 pr_err("Pasid 0x%x DQM create queue type %d failed. ret %d\n",
298 pqm->process->pasid, type, retval);
299 goto err_create_queue;
300 }
301
302 if (q && p_doorbell_offset_in_process)
303 /* Return the doorbell offset within the doorbell page
304 * to the caller so it can be passed up to user mode
305 * (in bytes).
306 * There are always 1024 doorbells per process, so in case
307 * of 8-byte doorbells, there are two doorbell pages per
308 * process.
309 */
310 *p_doorbell_offset_in_process =
311 (q->properties.doorbell_off * sizeof(uint32_t)) &
312 (kfd_doorbell_process_slice(dev) - 1);
313
314 pr_debug("PQM After DQM create queue\n");
315
316 list_add(&pqn->process_queue_list, &pqm->queues);
317
318 if (q) {
319 pr_debug("PQM done creating queue\n");
320 kfd_procfs_add_queue(q);
321 print_queue_properties(&q->properties);
322 }
323
324 return retval;
325
326 err_create_queue:
327 uninit_queue(q);
328 if (kq)
329 kernel_queue_uninit(kq, false);
330 kfree(pqn);
331 err_allocate_pqn:
332 /* check if queues list is empty unregister process from device */
333 clear_bit(*qid, pqm->queue_slot_bitmap);
334 if (list_empty(&pdd->qpd.queues_list) &&
335 list_empty(&pdd->qpd.priv_queue_list))
336 dev->dqm->ops.unregister_process(dev->dqm, &pdd->qpd);
337 return retval;
338 }
339
pqm_destroy_queue(struct process_queue_manager * pqm,unsigned int qid)340 int pqm_destroy_queue(struct process_queue_manager *pqm, unsigned int qid)
341 {
342 struct process_queue_node *pqn;
343 struct kfd_process_device *pdd;
344 struct device_queue_manager *dqm;
345 struct kfd_dev *dev;
346 int retval;
347
348 dqm = NULL;
349
350 retval = 0;
351
352 pqn = get_queue_by_qid(pqm, qid);
353 if (!pqn) {
354 pr_err("Queue id does not match any known queue\n");
355 return -EINVAL;
356 }
357
358 dev = NULL;
359 if (pqn->kq)
360 dev = pqn->kq->dev;
361 if (pqn->q)
362 dev = pqn->q->device;
363 if (WARN_ON(!dev))
364 return -ENODEV;
365
366 pdd = kfd_get_process_device_data(dev, pqm->process);
367 if (!pdd) {
368 pr_err("Process device data doesn't exist\n");
369 return -1;
370 }
371
372 if (pqn->kq) {
373 /* destroy kernel queue (DIQ) */
374 dqm = pqn->kq->dev->dqm;
375 dqm->ops.destroy_kernel_queue(dqm, pqn->kq, &pdd->qpd);
376 kernel_queue_uninit(pqn->kq, false);
377 }
378
379 if (pqn->q) {
380 kfd_procfs_del_queue(pqn->q);
381 dqm = pqn->q->device->dqm;
382 retval = dqm->ops.destroy_queue(dqm, &pdd->qpd, pqn->q);
383 if (retval) {
384 pr_err("Pasid 0x%x destroy queue %d failed, ret %d\n",
385 pqm->process->pasid,
386 pqn->q->properties.queue_id, retval);
387 if (retval != -ETIME)
388 goto err_destroy_queue;
389 }
390
391 if (pqn->q->gws) {
392 amdgpu_amdkfd_remove_gws_from_process(pqm->process->kgd_process_info,
393 pqn->q->gws);
394 pdd->qpd.num_gws = 0;
395 }
396
397 kfree(pqn->q->properties.cu_mask);
398 pqn->q->properties.cu_mask = NULL;
399 uninit_queue(pqn->q);
400 }
401
402 list_del(&pqn->process_queue_list);
403 kfree(pqn);
404 clear_bit(qid, pqm->queue_slot_bitmap);
405
406 if (list_empty(&pdd->qpd.queues_list) &&
407 list_empty(&pdd->qpd.priv_queue_list))
408 dqm->ops.unregister_process(dqm, &pdd->qpd);
409
410 err_destroy_queue:
411 return retval;
412 }
413
pqm_update_queue(struct process_queue_manager * pqm,unsigned int qid,struct queue_properties * p)414 int pqm_update_queue(struct process_queue_manager *pqm, unsigned int qid,
415 struct queue_properties *p)
416 {
417 int retval;
418 struct process_queue_node *pqn;
419
420 pqn = get_queue_by_qid(pqm, qid);
421 if (!pqn) {
422 pr_debug("No queue %d exists for update operation\n", qid);
423 return -EFAULT;
424 }
425
426 pqn->q->properties.queue_address = p->queue_address;
427 pqn->q->properties.queue_size = p->queue_size;
428 pqn->q->properties.queue_percent = p->queue_percent;
429 pqn->q->properties.priority = p->priority;
430
431 retval = pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
432 pqn->q);
433 if (retval != 0)
434 return retval;
435
436 return 0;
437 }
438
pqm_set_cu_mask(struct process_queue_manager * pqm,unsigned int qid,struct queue_properties * p)439 int pqm_set_cu_mask(struct process_queue_manager *pqm, unsigned int qid,
440 struct queue_properties *p)
441 {
442 int retval;
443 struct process_queue_node *pqn;
444
445 pqn = get_queue_by_qid(pqm, qid);
446 if (!pqn) {
447 pr_debug("No queue %d exists for update operation\n", qid);
448 return -EFAULT;
449 }
450
451 /* Free the old CU mask memory if it is already allocated, then
452 * allocate memory for the new CU mask.
453 */
454 kfree(pqn->q->properties.cu_mask);
455
456 pqn->q->properties.cu_mask_count = p->cu_mask_count;
457 pqn->q->properties.cu_mask = p->cu_mask;
458
459 retval = pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
460 pqn->q);
461 if (retval != 0)
462 return retval;
463
464 return 0;
465 }
466
pqm_get_kernel_queue(struct process_queue_manager * pqm,unsigned int qid)467 struct kernel_queue *pqm_get_kernel_queue(
468 struct process_queue_manager *pqm,
469 unsigned int qid)
470 {
471 struct process_queue_node *pqn;
472
473 pqn = get_queue_by_qid(pqm, qid);
474 if (pqn && pqn->kq)
475 return pqn->kq;
476
477 return NULL;
478 }
479
pqm_get_user_queue(struct process_queue_manager * pqm,unsigned int qid)480 struct queue *pqm_get_user_queue(struct process_queue_manager *pqm,
481 unsigned int qid)
482 {
483 struct process_queue_node *pqn;
484
485 pqn = get_queue_by_qid(pqm, qid);
486 return pqn ? pqn->q : NULL;
487 }
488
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)489 int pqm_get_wave_state(struct process_queue_manager *pqm,
490 unsigned int qid,
491 void __user *ctl_stack,
492 u32 *ctl_stack_used_size,
493 u32 *save_area_used_size)
494 {
495 struct process_queue_node *pqn;
496
497 pqn = get_queue_by_qid(pqm, qid);
498 if (!pqn) {
499 pr_debug("amdkfd: No queue %d exists for operation\n",
500 qid);
501 return -EFAULT;
502 }
503
504 return pqn->q->device->dqm->ops.get_wave_state(pqn->q->device->dqm,
505 pqn->q,
506 ctl_stack,
507 ctl_stack_used_size,
508 save_area_used_size);
509 }
510
511 #if defined(CONFIG_DEBUG_FS)
512
pqm_debugfs_mqds(struct seq_file * m,void * data)513 int pqm_debugfs_mqds(struct seq_file *m, void *data)
514 {
515 struct process_queue_manager *pqm = data;
516 struct process_queue_node *pqn;
517 struct queue *q;
518 enum KFD_MQD_TYPE mqd_type;
519 struct mqd_manager *mqd_mgr;
520 int r = 0;
521
522 list_for_each_entry(pqn, &pqm->queues, process_queue_list) {
523 if (pqn->q) {
524 q = pqn->q;
525 switch (q->properties.type) {
526 case KFD_QUEUE_TYPE_SDMA:
527 case KFD_QUEUE_TYPE_SDMA_XGMI:
528 seq_printf(m, " SDMA queue on device %x\n",
529 q->device->id);
530 mqd_type = KFD_MQD_TYPE_SDMA;
531 break;
532 case KFD_QUEUE_TYPE_COMPUTE:
533 seq_printf(m, " Compute queue on device %x\n",
534 q->device->id);
535 mqd_type = KFD_MQD_TYPE_CP;
536 break;
537 default:
538 seq_printf(m,
539 " Bad user queue type %d on device %x\n",
540 q->properties.type, q->device->id);
541 continue;
542 }
543 mqd_mgr = q->device->dqm->mqd_mgrs[mqd_type];
544 } else if (pqn->kq) {
545 q = pqn->kq->queue;
546 mqd_mgr = pqn->kq->mqd_mgr;
547 switch (q->properties.type) {
548 case KFD_QUEUE_TYPE_DIQ:
549 seq_printf(m, " DIQ on device %x\n",
550 pqn->kq->dev->id);
551 break;
552 default:
553 seq_printf(m,
554 " Bad kernel queue type %d on device %x\n",
555 q->properties.type,
556 pqn->kq->dev->id);
557 continue;
558 }
559 } else {
560 seq_printf(m,
561 " Weird: Queue node with neither kernel nor user queue\n");
562 continue;
563 }
564
565 r = mqd_mgr->debugfs_show_mqd(m, q->mqd);
566 if (r != 0)
567 break;
568 }
569
570 return r;
571 }
572
573 #endif
574