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 %d\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 uninit_queue(pqn->q);
157 list_del(&pqn->process_queue_list);
158 kfree(pqn);
159 }
160
161 kfree(pqm->queue_slot_bitmap);
162 pqm->queue_slot_bitmap = NULL;
163 }
164
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)165 static int create_cp_queue(struct process_queue_manager *pqm,
166 struct kfd_dev *dev, struct queue **q,
167 struct queue_properties *q_properties,
168 struct file *f, unsigned int qid)
169 {
170 int retval;
171
172 /* Doorbell initialized in user space*/
173 q_properties->doorbell_ptr = NULL;
174
175 /* let DQM handle it*/
176 q_properties->vmid = 0;
177 q_properties->queue_id = qid;
178
179 retval = init_queue(q, q_properties);
180 if (retval != 0)
181 return retval;
182
183 (*q)->device = dev;
184 (*q)->process = pqm->process;
185
186 pr_debug("PQM After init queue");
187
188 return retval;
189 }
190
pqm_create_queue(struct process_queue_manager * pqm,struct kfd_dev * dev,struct file * f,struct queue_properties * properties,unsigned int * qid)191 int pqm_create_queue(struct process_queue_manager *pqm,
192 struct kfd_dev *dev,
193 struct file *f,
194 struct queue_properties *properties,
195 unsigned int *qid)
196 {
197 int retval;
198 struct kfd_process_device *pdd;
199 struct queue *q;
200 struct process_queue_node *pqn;
201 struct kernel_queue *kq;
202 enum kfd_queue_type type = properties->type;
203 unsigned int max_queues = 127; /* HWS limit */
204
205 q = NULL;
206 kq = NULL;
207
208 pdd = kfd_get_process_device_data(dev, pqm->process);
209 if (!pdd) {
210 pr_err("Process device data doesn't exist\n");
211 return -1;
212 }
213
214 /*
215 * for debug process, verify that it is within the static queues limit
216 * currently limit is set to half of the total avail HQD slots
217 * If we are just about to create DIQ, the is_debug flag is not set yet
218 * Hence we also check the type as well
219 */
220 if ((pdd->qpd.is_debug) || (type == KFD_QUEUE_TYPE_DIQ))
221 max_queues = dev->device_info->max_no_of_hqd/2;
222
223 if (pdd->qpd.queue_count >= max_queues)
224 return -ENOSPC;
225
226 retval = find_available_queue_slot(pqm, qid);
227 if (retval != 0)
228 return retval;
229
230 if (list_empty(&pdd->qpd.queues_list) &&
231 list_empty(&pdd->qpd.priv_queue_list))
232 dev->dqm->ops.register_process(dev->dqm, &pdd->qpd);
233
234 pqn = kzalloc(sizeof(*pqn), GFP_KERNEL);
235 if (!pqn) {
236 retval = -ENOMEM;
237 goto err_allocate_pqn;
238 }
239
240 switch (type) {
241 case KFD_QUEUE_TYPE_SDMA:
242 case KFD_QUEUE_TYPE_SDMA_XGMI:
243 if ((type == KFD_QUEUE_TYPE_SDMA && dev->dqm->sdma_queue_count
244 >= get_num_sdma_queues(dev->dqm)) ||
245 (type == KFD_QUEUE_TYPE_SDMA_XGMI &&
246 dev->dqm->xgmi_sdma_queue_count
247 >= get_num_xgmi_sdma_queues(dev->dqm))) {
248 pr_debug("Over-subscription is not allowed for SDMA.\n");
249 retval = -EPERM;
250 goto err_create_queue;
251 }
252
253 retval = create_cp_queue(pqm, dev, &q, properties, f, *qid);
254 if (retval != 0)
255 goto err_create_queue;
256 pqn->q = q;
257 pqn->kq = NULL;
258 retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd);
259 pr_debug("DQM returned %d for create_queue\n", retval);
260 print_queue(q);
261 break;
262
263 case KFD_QUEUE_TYPE_COMPUTE:
264 /* check if there is over subscription */
265 if ((dev->dqm->sched_policy ==
266 KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION) &&
267 ((dev->dqm->processes_count >= dev->vm_info.vmid_num_kfd) ||
268 (dev->dqm->queue_count >= get_queues_num(dev->dqm)))) {
269 pr_debug("Over-subscription is not allowed when amdkfd.sched_policy == 1\n");
270 retval = -EPERM;
271 goto err_create_queue;
272 }
273
274 retval = create_cp_queue(pqm, dev, &q, properties, f, *qid);
275 if (retval != 0)
276 goto err_create_queue;
277 pqn->q = q;
278 pqn->kq = NULL;
279 retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd);
280 pr_debug("DQM returned %d for create_queue\n", retval);
281 print_queue(q);
282 break;
283 case KFD_QUEUE_TYPE_DIQ:
284 kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_DIQ);
285 if (!kq) {
286 retval = -ENOMEM;
287 goto err_create_queue;
288 }
289 kq->queue->properties.queue_id = *qid;
290 pqn->kq = kq;
291 pqn->q = NULL;
292 retval = dev->dqm->ops.create_kernel_queue(dev->dqm,
293 kq, &pdd->qpd);
294 break;
295 default:
296 WARN(1, "Invalid queue type %d", type);
297 retval = -EINVAL;
298 }
299
300 if (retval != 0) {
301 pr_err("Pasid %d DQM create queue %d failed. ret %d\n",
302 pqm->process->pasid, type, retval);
303 goto err_create_queue;
304 }
305
306 if (q)
307 /* Return the doorbell offset within the doorbell page
308 * to the caller so it can be passed up to user mode
309 * (in bytes).
310 */
311 properties->doorbell_off =
312 (q->properties.doorbell_off * sizeof(uint32_t)) &
313 (kfd_doorbell_process_slice(dev) - 1);
314
315 pr_debug("PQM After DQM create queue\n");
316
317 list_add(&pqn->process_queue_list, &pqm->queues);
318
319 if (q) {
320 pr_debug("PQM done creating queue\n");
321 print_queue_properties(&q->properties);
322 }
323
324 return retval;
325
326 err_create_queue:
327 kfree(pqn);
328 err_allocate_pqn:
329 /* check if queues list is empty unregister process from device */
330 clear_bit(*qid, pqm->queue_slot_bitmap);
331 if (list_empty(&pdd->qpd.queues_list) &&
332 list_empty(&pdd->qpd.priv_queue_list))
333 dev->dqm->ops.unregister_process(dev->dqm, &pdd->qpd);
334 return retval;
335 }
336
pqm_destroy_queue(struct process_queue_manager * pqm,unsigned int qid)337 int pqm_destroy_queue(struct process_queue_manager *pqm, unsigned int qid)
338 {
339 struct process_queue_node *pqn;
340 struct kfd_process_device *pdd;
341 struct device_queue_manager *dqm;
342 struct kfd_dev *dev;
343 int retval;
344
345 dqm = NULL;
346
347 retval = 0;
348
349 pqn = get_queue_by_qid(pqm, qid);
350 if (!pqn) {
351 pr_err("Queue id does not match any known queue\n");
352 return -EINVAL;
353 }
354
355 dev = NULL;
356 if (pqn->kq)
357 dev = pqn->kq->dev;
358 if (pqn->q)
359 dev = pqn->q->device;
360 if (WARN_ON(!dev))
361 return -ENODEV;
362
363 pdd = kfd_get_process_device_data(dev, pqm->process);
364 if (!pdd) {
365 pr_err("Process device data doesn't exist\n");
366 return -1;
367 }
368
369 if (pqn->kq) {
370 /* destroy kernel queue (DIQ) */
371 dqm = pqn->kq->dev->dqm;
372 dqm->ops.destroy_kernel_queue(dqm, pqn->kq, &pdd->qpd);
373 kernel_queue_uninit(pqn->kq);
374 }
375
376 if (pqn->q) {
377 dqm = pqn->q->device->dqm;
378 retval = dqm->ops.destroy_queue(dqm, &pdd->qpd, pqn->q);
379 if (retval) {
380 pr_err("Pasid %d destroy queue %d failed, ret %d\n",
381 pqm->process->pasid,
382 pqn->q->properties.queue_id, retval);
383 if (retval != -ETIME)
384 goto err_destroy_queue;
385 }
386
387 if (pqn->q->gws) {
388 amdgpu_amdkfd_remove_gws_from_process(pqm->process->kgd_process_info,
389 pqn->q->gws);
390 pdd->qpd.num_gws = 0;
391 }
392
393 kfree(pqn->q->properties.cu_mask);
394 pqn->q->properties.cu_mask = NULL;
395 uninit_queue(pqn->q);
396 }
397
398 list_del(&pqn->process_queue_list);
399 kfree(pqn);
400 clear_bit(qid, pqm->queue_slot_bitmap);
401
402 if (list_empty(&pdd->qpd.queues_list) &&
403 list_empty(&pdd->qpd.priv_queue_list))
404 dqm->ops.unregister_process(dqm, &pdd->qpd);
405
406 err_destroy_queue:
407 return retval;
408 }
409
pqm_update_queue(struct process_queue_manager * pqm,unsigned int qid,struct queue_properties * p)410 int pqm_update_queue(struct process_queue_manager *pqm, unsigned int qid,
411 struct queue_properties *p)
412 {
413 int retval;
414 struct process_queue_node *pqn;
415
416 pqn = get_queue_by_qid(pqm, qid);
417 if (!pqn) {
418 pr_debug("No queue %d exists for update operation\n", qid);
419 return -EFAULT;
420 }
421
422 pqn->q->properties.queue_address = p->queue_address;
423 pqn->q->properties.queue_size = p->queue_size;
424 pqn->q->properties.queue_percent = p->queue_percent;
425 pqn->q->properties.priority = p->priority;
426
427 retval = pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
428 pqn->q);
429 if (retval != 0)
430 return retval;
431
432 return 0;
433 }
434
pqm_set_cu_mask(struct process_queue_manager * pqm,unsigned int qid,struct queue_properties * p)435 int pqm_set_cu_mask(struct process_queue_manager *pqm, unsigned int qid,
436 struct queue_properties *p)
437 {
438 int retval;
439 struct process_queue_node *pqn;
440
441 pqn = get_queue_by_qid(pqm, qid);
442 if (!pqn) {
443 pr_debug("No queue %d exists for update operation\n", qid);
444 return -EFAULT;
445 }
446
447 /* Free the old CU mask memory if it is already allocated, then
448 * allocate memory for the new CU mask.
449 */
450 kfree(pqn->q->properties.cu_mask);
451
452 pqn->q->properties.cu_mask_count = p->cu_mask_count;
453 pqn->q->properties.cu_mask = p->cu_mask;
454
455 retval = pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
456 pqn->q);
457 if (retval != 0)
458 return retval;
459
460 return 0;
461 }
462
pqm_get_kernel_queue(struct process_queue_manager * pqm,unsigned int qid)463 struct kernel_queue *pqm_get_kernel_queue(
464 struct process_queue_manager *pqm,
465 unsigned int qid)
466 {
467 struct process_queue_node *pqn;
468
469 pqn = get_queue_by_qid(pqm, qid);
470 if (pqn && pqn->kq)
471 return pqn->kq;
472
473 return NULL;
474 }
475
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)476 int pqm_get_wave_state(struct process_queue_manager *pqm,
477 unsigned int qid,
478 void __user *ctl_stack,
479 u32 *ctl_stack_used_size,
480 u32 *save_area_used_size)
481 {
482 struct process_queue_node *pqn;
483
484 pqn = get_queue_by_qid(pqm, qid);
485 if (!pqn) {
486 pr_debug("amdkfd: No queue %d exists for operation\n",
487 qid);
488 return -EFAULT;
489 }
490
491 return pqn->q->device->dqm->ops.get_wave_state(pqn->q->device->dqm,
492 pqn->q,
493 ctl_stack,
494 ctl_stack_used_size,
495 save_area_used_size);
496 }
497
498 #if defined(CONFIG_DEBUG_FS)
499
pqm_debugfs_mqds(struct seq_file * m,void * data)500 int pqm_debugfs_mqds(struct seq_file *m, void *data)
501 {
502 struct process_queue_manager *pqm = data;
503 struct process_queue_node *pqn;
504 struct queue *q;
505 enum KFD_MQD_TYPE mqd_type;
506 struct mqd_manager *mqd_mgr;
507 int r = 0;
508
509 list_for_each_entry(pqn, &pqm->queues, process_queue_list) {
510 if (pqn->q) {
511 q = pqn->q;
512 switch (q->properties.type) {
513 case KFD_QUEUE_TYPE_SDMA:
514 case KFD_QUEUE_TYPE_SDMA_XGMI:
515 seq_printf(m, " SDMA queue on device %x\n",
516 q->device->id);
517 mqd_type = KFD_MQD_TYPE_SDMA;
518 break;
519 case KFD_QUEUE_TYPE_COMPUTE:
520 seq_printf(m, " Compute queue on device %x\n",
521 q->device->id);
522 mqd_type = KFD_MQD_TYPE_CP;
523 break;
524 default:
525 seq_printf(m,
526 " Bad user queue type %d on device %x\n",
527 q->properties.type, q->device->id);
528 continue;
529 }
530 mqd_mgr = q->device->dqm->mqd_mgrs[mqd_type];
531 } else if (pqn->kq) {
532 q = pqn->kq->queue;
533 mqd_mgr = pqn->kq->mqd_mgr;
534 switch (q->properties.type) {
535 case KFD_QUEUE_TYPE_DIQ:
536 seq_printf(m, " DIQ on device %x\n",
537 pqn->kq->dev->id);
538 break;
539 default:
540 seq_printf(m,
541 " Bad kernel queue type %d on device %x\n",
542 q->properties.type,
543 pqn->kq->dev->id);
544 continue;
545 }
546 } else {
547 seq_printf(m,
548 " Weird: Queue node with neither kernel nor user queue\n");
549 continue;
550 }
551
552 r = mqd_mgr->debugfs_show_mqd(m, q->mqd);
553 if (r != 0)
554 break;
555 }
556
557 return r;
558 }
559
560 #endif
561
