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 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
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)165 static int init_user_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,uint32_t * p_doorbell_offset_in_process)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 uint32_t *p_doorbell_offset_in_process)
197 {
198 int retval;
199 struct kfd_process_device *pdd;
200 struct queue *q;
201 struct process_queue_node *pqn;
202 struct kernel_queue *kq;
203 enum kfd_queue_type type = properties->type;
204 unsigned int max_queues = 127; /* HWS limit */
205
206 q = NULL;
207 kq = NULL;
208
209 pdd = kfd_get_process_device_data(dev, pqm->process);
210 if (!pdd) {
211 pr_err("Process device data doesn't exist\n");
212 return -1;
213 }
214
215 /*
216 * for debug process, verify that it is within the static queues limit
217 * currently limit is set to half of the total avail HQD slots
218 * If we are just about to create DIQ, the is_debug flag is not set yet
219 * Hence we also check the type as well
220 */
221 if ((pdd->qpd.is_debug) || (type == KFD_QUEUE_TYPE_DIQ))
222 max_queues = dev->device_info->max_no_of_hqd/2;
223
224 if (pdd->qpd.queue_count >= max_queues)
225 return -ENOSPC;
226
227 retval = find_available_queue_slot(pqm, qid);
228 if (retval != 0)
229 return retval;
230
231 if (list_empty(&pdd->qpd.queues_list) &&
232 list_empty(&pdd->qpd.priv_queue_list))
233 dev->dqm->ops.register_process(dev->dqm, &pdd->qpd);
234
235 pqn = kzalloc(sizeof(*pqn), GFP_KERNEL);
236 if (!pqn) {
237 retval = -ENOMEM;
238 goto err_allocate_pqn;
239 }
240
241 switch (type) {
242 case KFD_QUEUE_TYPE_SDMA:
243 case KFD_QUEUE_TYPE_SDMA_XGMI:
244 /* SDMA queues are always allocated statically no matter
245 * which scheduler mode is used. We also do not need to
246 * check whether a SDMA queue can be allocated here, because
247 * allocate_sdma_queue() in create_queue() has the
248 * corresponding check logic.
249 */
250 retval = init_user_queue(pqm, dev, &q, properties, f, *qid);
251 if (retval != 0)
252 goto err_create_queue;
253 pqn->q = q;
254 pqn->kq = NULL;
255 retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd);
256 print_queue(q);
257 break;
258
259 case KFD_QUEUE_TYPE_COMPUTE:
260 /* check if there is over subscription */
261 if ((dev->dqm->sched_policy ==
262 KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION) &&
263 ((dev->dqm->processes_count >= dev->vm_info.vmid_num_kfd) ||
264 (dev->dqm->active_queue_count >= get_cp_queues_num(dev->dqm)))) {
265 pr_debug("Over-subscription is not allowed when amdkfd.sched_policy == 1\n");
266 retval = -EPERM;
267 goto err_create_queue;
268 }
269
270 retval = init_user_queue(pqm, dev, &q, properties, f, *qid);
271 if (retval != 0)
272 goto err_create_queue;
273 pqn->q = q;
274 pqn->kq = NULL;
275 retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd);
276 print_queue(q);
277 break;
278 case KFD_QUEUE_TYPE_DIQ:
279 kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_DIQ);
280 if (!kq) {
281 retval = -ENOMEM;
282 goto err_create_queue;
283 }
284 kq->queue->properties.queue_id = *qid;
285 pqn->kq = kq;
286 pqn->q = NULL;
287 retval = dev->dqm->ops.create_kernel_queue(dev->dqm,
288 kq, &pdd->qpd);
289 break;
290 default:
291 WARN(1, "Invalid queue type %d", type);
292 retval = -EINVAL;
293 }
294
295 if (retval != 0) {
296 pr_err("Pasid 0x%x DQM create queue type %d failed. ret %d\n",
297 pqm->process->pasid, type, retval);
298 goto err_create_queue;
299 }
300
301 if (q && p_doorbell_offset_in_process)
302 /* Return the doorbell offset within the doorbell page
303 * to the caller so it can be passed up to user mode
304 * (in bytes).
305 * There are always 1024 doorbells per process, so in case
306 * of 8-byte doorbells, there are two doorbell pages per
307 * process.
308 */
309 *p_doorbell_offset_in_process =
310 (q->properties.doorbell_off * sizeof(uint32_t)) &
311 (kfd_doorbell_process_slice(dev) - 1);
312
313 pr_debug("PQM After DQM create queue\n");
314
315 list_add(&pqn->process_queue_list, &pqm->queues);
316
317 if (q) {
318 pr_debug("PQM done creating queue\n");
319 kfd_procfs_add_queue(q);
320 print_queue_properties(&q->properties);
321 }
322
323 return retval;
324
325 err_create_queue:
326 uninit_queue(q);
327 if (kq)
328 kernel_queue_uninit(kq, false);
329 kfree(pqn);
330 err_allocate_pqn:
331 /* check if queues list is empty unregister process from device */
332 clear_bit(*qid, pqm->queue_slot_bitmap);
333 if (list_empty(&pdd->qpd.queues_list) &&
334 list_empty(&pdd->qpd.priv_queue_list))
335 dev->dqm->ops.unregister_process(dev->dqm, &pdd->qpd);
336 return retval;
337 }
338
pqm_destroy_queue(struct process_queue_manager * pqm,unsigned int qid)339 int pqm_destroy_queue(struct process_queue_manager *pqm, unsigned int qid)
340 {
341 struct process_queue_node *pqn;
342 struct kfd_process_device *pdd;
343 struct device_queue_manager *dqm;
344 struct kfd_dev *dev;
345 int retval;
346
347 dqm = NULL;
348
349 retval = 0;
350
351 pqn = get_queue_by_qid(pqm, qid);
352 if (!pqn) {
353 pr_err("Queue id does not match any known queue\n");
354 return -EINVAL;
355 }
356
357 dev = NULL;
358 if (pqn->kq)
359 dev = pqn->kq->dev;
360 if (pqn->q)
361 dev = pqn->q->device;
362 if (WARN_ON(!dev))
363 return -ENODEV;
364
365 pdd = kfd_get_process_device_data(dev, pqm->process);
366 if (!pdd) {
367 pr_err("Process device data doesn't exist\n");
368 return -1;
369 }
370
371 if (pqn->kq) {
372 /* destroy kernel queue (DIQ) */
373 dqm = pqn->kq->dev->dqm;
374 dqm->ops.destroy_kernel_queue(dqm, pqn->kq, &pdd->qpd);
375 kernel_queue_uninit(pqn->kq, false);
376 }
377
378 if (pqn->q) {
379 kfd_procfs_del_queue(pqn->q);
380 dqm = pqn->q->device->dqm;
381 retval = dqm->ops.destroy_queue(dqm, &pdd->qpd, pqn->q);
382 if (retval) {
383 pr_err("Pasid 0x%x destroy queue %d failed, ret %d\n",
384 pqm->process->pasid,
385 pqn->q->properties.queue_id, retval);
386 if (retval != -ETIME)
387 goto err_destroy_queue;
388 }
389
390 if (pqn->q->gws) {
391 amdgpu_amdkfd_remove_gws_from_process(pqm->process->kgd_process_info,
392 pqn->q->gws);
393 pdd->qpd.num_gws = 0;
394 }
395
396 kfree(pqn->q->properties.cu_mask);
397 pqn->q->properties.cu_mask = NULL;
398 uninit_queue(pqn->q);
399 }
400
401 list_del(&pqn->process_queue_list);
402 kfree(pqn);
403 clear_bit(qid, pqm->queue_slot_bitmap);
404
405 if (list_empty(&pdd->qpd.queues_list) &&
406 list_empty(&pdd->qpd.priv_queue_list))
407 dqm->ops.unregister_process(dqm, &pdd->qpd);
408
409 err_destroy_queue:
410 return retval;
411 }
412
pqm_update_queue(struct process_queue_manager * pqm,unsigned int qid,struct queue_properties * p)413 int pqm_update_queue(struct process_queue_manager *pqm, unsigned int qid,
414 struct queue_properties *p)
415 {
416 int retval;
417 struct process_queue_node *pqn;
418
419 pqn = get_queue_by_qid(pqm, qid);
420 if (!pqn) {
421 pr_debug("No queue %d exists for update operation\n", qid);
422 return -EFAULT;
423 }
424
425 pqn->q->properties.queue_address = p->queue_address;
426 pqn->q->properties.queue_size = p->queue_size;
427 pqn->q->properties.queue_percent = p->queue_percent;
428 pqn->q->properties.priority = p->priority;
429
430 retval = pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
431 pqn->q);
432 if (retval != 0)
433 return retval;
434
435 return 0;
436 }
437
pqm_set_cu_mask(struct process_queue_manager * pqm,unsigned int qid,struct queue_properties * p)438 int pqm_set_cu_mask(struct process_queue_manager *pqm, unsigned int qid,
439 struct queue_properties *p)
440 {
441 int retval;
442 struct process_queue_node *pqn;
443
444 pqn = get_queue_by_qid(pqm, qid);
445 if (!pqn) {
446 pr_debug("No queue %d exists for update operation\n", qid);
447 return -EFAULT;
448 }
449
450 /* Free the old CU mask memory if it is already allocated, then
451 * allocate memory for the new CU mask.
452 */
453 kfree(pqn->q->properties.cu_mask);
454
455 pqn->q->properties.cu_mask_count = p->cu_mask_count;
456 pqn->q->properties.cu_mask = p->cu_mask;
457
458 retval = pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
459 pqn->q);
460 if (retval != 0)
461 return retval;
462
463 return 0;
464 }
465
pqm_get_kernel_queue(struct process_queue_manager * pqm,unsigned int qid)466 struct kernel_queue *pqm_get_kernel_queue(
467 struct process_queue_manager *pqm,
468 unsigned int qid)
469 {
470 struct process_queue_node *pqn;
471
472 pqn = get_queue_by_qid(pqm, qid);
473 if (pqn && pqn->kq)
474 return pqn->kq;
475
476 return NULL;
477 }
478
pqm_get_user_queue(struct process_queue_manager * pqm,unsigned int qid)479 struct queue *pqm_get_user_queue(struct process_queue_manager *pqm,
480 unsigned int qid)
481 {
482 struct process_queue_node *pqn;
483
484 pqn = get_queue_by_qid(pqm, qid);
485 return pqn ? pqn->q : NULL;
486 }
487
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)488 int pqm_get_wave_state(struct process_queue_manager *pqm,
489 unsigned int qid,
490 void __user *ctl_stack,
491 u32 *ctl_stack_used_size,
492 u32 *save_area_used_size)
493 {
494 struct process_queue_node *pqn;
495
496 pqn = get_queue_by_qid(pqm, qid);
497 if (!pqn) {
498 pr_debug("amdkfd: No queue %d exists for operation\n",
499 qid);
500 return -EFAULT;
501 }
502
503 return pqn->q->device->dqm->ops.get_wave_state(pqn->q->device->dqm,
504 pqn->q,
505 ctl_stack,
506 ctl_stack_used_size,
507 save_area_used_size);
508 }
509
510 #if defined(CONFIG_DEBUG_FS)
511
pqm_debugfs_mqds(struct seq_file * m,void * data)512 int pqm_debugfs_mqds(struct seq_file *m, void *data)
513 {
514 struct process_queue_manager *pqm = data;
515 struct process_queue_node *pqn;
516 struct queue *q;
517 enum KFD_MQD_TYPE mqd_type;
518 struct mqd_manager *mqd_mgr;
519 int r = 0;
520
521 list_for_each_entry(pqn, &pqm->queues, process_queue_list) {
522 if (pqn->q) {
523 q = pqn->q;
524 switch (q->properties.type) {
525 case KFD_QUEUE_TYPE_SDMA:
526 case KFD_QUEUE_TYPE_SDMA_XGMI:
527 seq_printf(m, " SDMA queue on device %x\n",
528 q->device->id);
529 mqd_type = KFD_MQD_TYPE_SDMA;
530 break;
531 case KFD_QUEUE_TYPE_COMPUTE:
532 seq_printf(m, " Compute queue on device %x\n",
533 q->device->id);
534 mqd_type = KFD_MQD_TYPE_CP;
535 break;
536 default:
537 seq_printf(m,
538 " Bad user queue type %d on device %x\n",
539 q->properties.type, q->device->id);
540 continue;
541 }
542 mqd_mgr = q->device->dqm->mqd_mgrs[mqd_type];
543 } else if (pqn->kq) {
544 q = pqn->kq->queue;
545 mqd_mgr = pqn->kq->mqd_mgr;
546 switch (q->properties.type) {
547 case KFD_QUEUE_TYPE_DIQ:
548 seq_printf(m, " DIQ on device %x\n",
549 pqn->kq->dev->id);
550 break;
551 default:
552 seq_printf(m,
553 " Bad kernel queue type %d on device %x\n",
554 q->properties.type,
555 pqn->kq->dev->id);
556 continue;
557 }
558 } else {
559 seq_printf(m,
560 " Weird: Queue node with neither kernel nor user queue\n");
561 continue;
562 }
563
564 r = mqd_mgr->debugfs_show_mqd(m, q->mqd);
565 if (r != 0)
566 break;
567 }
568
569 return r;
570 }
571
572 #endif
573
