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 #include <linux/device.h>
24 #include <linux/export.h>
25 #include <linux/err.h>
26 #include <linux/fs.h>
27 #include <linux/sched.h>
28 #include <linux/slab.h>
29 #include <linux/uaccess.h>
30 #include <linux/compat.h>
31 #include <uapi/linux/kfd_ioctl.h>
32 #include <linux/time.h>
33 #include <linux/mm.h>
34 #include <uapi/asm-generic/mman-common.h>
35 #include <asm/processor.h>
36 #include "kfd_priv.h"
37 #include "kfd_device_queue_manager.h"
38
39 static long kfd_ioctl(struct file *, unsigned int, unsigned long);
40 static int kfd_open(struct inode *, struct file *);
41 static int kfd_mmap(struct file *, struct vm_area_struct *);
42
43 static const char kfd_dev_name[] = "kfd";
44
45 static const struct file_operations kfd_fops = {
46 .owner = THIS_MODULE,
47 .unlocked_ioctl = kfd_ioctl,
48 .compat_ioctl = kfd_ioctl,
49 .open = kfd_open,
50 .mmap = kfd_mmap,
51 };
52
53 static int kfd_char_dev_major = -1;
54 static struct class *kfd_class;
55 struct device *kfd_device;
56
kfd_chardev_init(void)57 int kfd_chardev_init(void)
58 {
59 int err = 0;
60
61 kfd_char_dev_major = register_chrdev(0, kfd_dev_name, &kfd_fops);
62 err = kfd_char_dev_major;
63 if (err < 0)
64 goto err_register_chrdev;
65
66 kfd_class = class_create(THIS_MODULE, kfd_dev_name);
67 err = PTR_ERR(kfd_class);
68 if (IS_ERR(kfd_class))
69 goto err_class_create;
70
71 kfd_device = device_create(kfd_class, NULL,
72 MKDEV(kfd_char_dev_major, 0),
73 NULL, kfd_dev_name);
74 err = PTR_ERR(kfd_device);
75 if (IS_ERR(kfd_device))
76 goto err_device_create;
77
78 return 0;
79
80 err_device_create:
81 class_destroy(kfd_class);
82 err_class_create:
83 unregister_chrdev(kfd_char_dev_major, kfd_dev_name);
84 err_register_chrdev:
85 return err;
86 }
87
kfd_chardev_exit(void)88 void kfd_chardev_exit(void)
89 {
90 device_destroy(kfd_class, MKDEV(kfd_char_dev_major, 0));
91 class_destroy(kfd_class);
92 unregister_chrdev(kfd_char_dev_major, kfd_dev_name);
93 }
94
kfd_chardev(void)95 struct device *kfd_chardev(void)
96 {
97 return kfd_device;
98 }
99
100
kfd_open(struct inode * inode,struct file * filep)101 static int kfd_open(struct inode *inode, struct file *filep)
102 {
103 struct kfd_process *process;
104 bool is_32bit_user_mode;
105
106 if (iminor(inode) != 0)
107 return -ENODEV;
108
109 is_32bit_user_mode = is_compat_task();
110
111 if (is_32bit_user_mode == true) {
112 dev_warn(kfd_device,
113 "Process %d (32-bit) failed to open /dev/kfd\n"
114 "32-bit processes are not supported by amdkfd\n",
115 current->pid);
116 return -EPERM;
117 }
118
119 process = kfd_create_process(current);
120 if (IS_ERR(process))
121 return PTR_ERR(process);
122
123 dev_dbg(kfd_device, "process %d opened, compat mode (32 bit) - %d\n",
124 process->pasid, process->is_32bit_user_mode);
125
126 return 0;
127 }
128
kfd_ioctl_get_version(struct file * filep,struct kfd_process * p,void * data)129 static int kfd_ioctl_get_version(struct file *filep, struct kfd_process *p,
130 void *data)
131 {
132 struct kfd_ioctl_get_version_args *args = data;
133 int err = 0;
134
135 args->major_version = KFD_IOCTL_MAJOR_VERSION;
136 args->minor_version = KFD_IOCTL_MINOR_VERSION;
137
138 return err;
139 }
140
set_queue_properties_from_user(struct queue_properties * q_properties,struct kfd_ioctl_create_queue_args * args)141 static int set_queue_properties_from_user(struct queue_properties *q_properties,
142 struct kfd_ioctl_create_queue_args *args)
143 {
144 if (args->queue_percentage > KFD_MAX_QUEUE_PERCENTAGE) {
145 pr_err("kfd: queue percentage must be between 0 to KFD_MAX_QUEUE_PERCENTAGE\n");
146 return -EINVAL;
147 }
148
149 if (args->queue_priority > KFD_MAX_QUEUE_PRIORITY) {
150 pr_err("kfd: queue priority must be between 0 to KFD_MAX_QUEUE_PRIORITY\n");
151 return -EINVAL;
152 }
153
154 if ((args->ring_base_address) &&
155 (!access_ok(VERIFY_WRITE,
156 (const void __user *) args->ring_base_address,
157 sizeof(uint64_t)))) {
158 pr_err("kfd: can't access ring base address\n");
159 return -EFAULT;
160 }
161
162 if (!is_power_of_2(args->ring_size) && (args->ring_size != 0)) {
163 pr_err("kfd: ring size must be a power of 2 or 0\n");
164 return -EINVAL;
165 }
166
167 if (!access_ok(VERIFY_WRITE,
168 (const void __user *) args->read_pointer_address,
169 sizeof(uint32_t))) {
170 pr_err("kfd: can't access read pointer\n");
171 return -EFAULT;
172 }
173
174 if (!access_ok(VERIFY_WRITE,
175 (const void __user *) args->write_pointer_address,
176 sizeof(uint32_t))) {
177 pr_err("kfd: can't access write pointer\n");
178 return -EFAULT;
179 }
180
181 if (args->eop_buffer_address &&
182 !access_ok(VERIFY_WRITE,
183 (const void __user *) args->eop_buffer_address,
184 sizeof(uint32_t))) {
185 pr_debug("kfd: can't access eop buffer");
186 return -EFAULT;
187 }
188
189 if (args->ctx_save_restore_address &&
190 !access_ok(VERIFY_WRITE,
191 (const void __user *) args->ctx_save_restore_address,
192 sizeof(uint32_t))) {
193 pr_debug("kfd: can't access ctx save restore buffer");
194 return -EFAULT;
195 }
196
197 q_properties->is_interop = false;
198 q_properties->queue_percent = args->queue_percentage;
199 q_properties->priority = args->queue_priority;
200 q_properties->queue_address = args->ring_base_address;
201 q_properties->queue_size = args->ring_size;
202 q_properties->read_ptr = (uint32_t *) args->read_pointer_address;
203 q_properties->write_ptr = (uint32_t *) args->write_pointer_address;
204 q_properties->eop_ring_buffer_address = args->eop_buffer_address;
205 q_properties->eop_ring_buffer_size = args->eop_buffer_size;
206 q_properties->ctx_save_restore_area_address =
207 args->ctx_save_restore_address;
208 q_properties->ctx_save_restore_area_size = args->ctx_save_restore_size;
209 if (args->queue_type == KFD_IOC_QUEUE_TYPE_COMPUTE ||
210 args->queue_type == KFD_IOC_QUEUE_TYPE_COMPUTE_AQL)
211 q_properties->type = KFD_QUEUE_TYPE_COMPUTE;
212 else if (args->queue_type == KFD_IOC_QUEUE_TYPE_SDMA)
213 q_properties->type = KFD_QUEUE_TYPE_SDMA;
214 else
215 return -ENOTSUPP;
216
217 if (args->queue_type == KFD_IOC_QUEUE_TYPE_COMPUTE_AQL)
218 q_properties->format = KFD_QUEUE_FORMAT_AQL;
219 else
220 q_properties->format = KFD_QUEUE_FORMAT_PM4;
221
222 pr_debug("Queue Percentage (%d, %d)\n",
223 q_properties->queue_percent, args->queue_percentage);
224
225 pr_debug("Queue Priority (%d, %d)\n",
226 q_properties->priority, args->queue_priority);
227
228 pr_debug("Queue Address (0x%llX, 0x%llX)\n",
229 q_properties->queue_address, args->ring_base_address);
230
231 pr_debug("Queue Size (0x%llX, %u)\n",
232 q_properties->queue_size, args->ring_size);
233
234 pr_debug("Queue r/w Pointers (0x%llX, 0x%llX)\n",
235 (uint64_t) q_properties->read_ptr,
236 (uint64_t) q_properties->write_ptr);
237
238 pr_debug("Queue Format (%d)\n", q_properties->format);
239
240 pr_debug("Queue EOP (0x%llX)\n", q_properties->eop_ring_buffer_address);
241
242 pr_debug("Queue CTX save arex (0x%llX)\n",
243 q_properties->ctx_save_restore_area_address);
244
245 return 0;
246 }
247
kfd_ioctl_create_queue(struct file * filep,struct kfd_process * p,void * data)248 static int kfd_ioctl_create_queue(struct file *filep, struct kfd_process *p,
249 void *data)
250 {
251 struct kfd_ioctl_create_queue_args *args = data;
252 struct kfd_dev *dev;
253 int err = 0;
254 unsigned int queue_id;
255 struct kfd_process_device *pdd;
256 struct queue_properties q_properties;
257
258 memset(&q_properties, 0, sizeof(struct queue_properties));
259
260 pr_debug("kfd: creating queue ioctl\n");
261
262 err = set_queue_properties_from_user(&q_properties, args);
263 if (err)
264 return err;
265
266 pr_debug("kfd: looking for gpu id 0x%x\n", args->gpu_id);
267 dev = kfd_device_by_id(args->gpu_id);
268 if (dev == NULL) {
269 pr_debug("kfd: gpu id 0x%x was not found\n", args->gpu_id);
270 return -EINVAL;
271 }
272
273 mutex_lock(&p->mutex);
274
275 pdd = kfd_bind_process_to_device(dev, p);
276 if (IS_ERR(pdd)) {
277 err = -ESRCH;
278 goto err_bind_process;
279 }
280
281 pr_debug("kfd: creating queue for PASID %d on GPU 0x%x\n",
282 p->pasid,
283 dev->id);
284
285 err = pqm_create_queue(&p->pqm, dev, filep, &q_properties,
286 0, q_properties.type, &queue_id);
287 if (err != 0)
288 goto err_create_queue;
289
290 args->queue_id = queue_id;
291
292 /* Return gpu_id as doorbell offset for mmap usage */
293 args->doorbell_offset = args->gpu_id << PAGE_SHIFT;
294
295 mutex_unlock(&p->mutex);
296
297 pr_debug("kfd: queue id %d was created successfully\n", args->queue_id);
298
299 pr_debug("ring buffer address == 0x%016llX\n",
300 args->ring_base_address);
301
302 pr_debug("read ptr address == 0x%016llX\n",
303 args->read_pointer_address);
304
305 pr_debug("write ptr address == 0x%016llX\n",
306 args->write_pointer_address);
307
308 return 0;
309
310 err_create_queue:
311 err_bind_process:
312 mutex_unlock(&p->mutex);
313 return err;
314 }
315
kfd_ioctl_destroy_queue(struct file * filp,struct kfd_process * p,void * data)316 static int kfd_ioctl_destroy_queue(struct file *filp, struct kfd_process *p,
317 void *data)
318 {
319 int retval;
320 struct kfd_ioctl_destroy_queue_args *args = data;
321
322 pr_debug("kfd: destroying queue id %d for PASID %d\n",
323 args->queue_id,
324 p->pasid);
325
326 mutex_lock(&p->mutex);
327
328 retval = pqm_destroy_queue(&p->pqm, args->queue_id);
329
330 mutex_unlock(&p->mutex);
331 return retval;
332 }
333
kfd_ioctl_update_queue(struct file * filp,struct kfd_process * p,void * data)334 static int kfd_ioctl_update_queue(struct file *filp, struct kfd_process *p,
335 void *data)
336 {
337 int retval;
338 struct kfd_ioctl_update_queue_args *args = data;
339 struct queue_properties properties;
340
341 if (args->queue_percentage > KFD_MAX_QUEUE_PERCENTAGE) {
342 pr_err("kfd: queue percentage must be between 0 to KFD_MAX_QUEUE_PERCENTAGE\n");
343 return -EINVAL;
344 }
345
346 if (args->queue_priority > KFD_MAX_QUEUE_PRIORITY) {
347 pr_err("kfd: queue priority must be between 0 to KFD_MAX_QUEUE_PRIORITY\n");
348 return -EINVAL;
349 }
350
351 if ((args->ring_base_address) &&
352 (!access_ok(VERIFY_WRITE,
353 (const void __user *) args->ring_base_address,
354 sizeof(uint64_t)))) {
355 pr_err("kfd: can't access ring base address\n");
356 return -EFAULT;
357 }
358
359 if (!is_power_of_2(args->ring_size) && (args->ring_size != 0)) {
360 pr_err("kfd: ring size must be a power of 2 or 0\n");
361 return -EINVAL;
362 }
363
364 properties.queue_address = args->ring_base_address;
365 properties.queue_size = args->ring_size;
366 properties.queue_percent = args->queue_percentage;
367 properties.priority = args->queue_priority;
368
369 pr_debug("kfd: updating queue id %d for PASID %d\n",
370 args->queue_id, p->pasid);
371
372 mutex_lock(&p->mutex);
373
374 retval = pqm_update_queue(&p->pqm, args->queue_id, &properties);
375
376 mutex_unlock(&p->mutex);
377
378 return retval;
379 }
380
kfd_ioctl_set_memory_policy(struct file * filep,struct kfd_process * p,void * data)381 static int kfd_ioctl_set_memory_policy(struct file *filep,
382 struct kfd_process *p, void *data)
383 {
384 struct kfd_ioctl_set_memory_policy_args *args = data;
385 struct kfd_dev *dev;
386 int err = 0;
387 struct kfd_process_device *pdd;
388 enum cache_policy default_policy, alternate_policy;
389
390 if (args->default_policy != KFD_IOC_CACHE_POLICY_COHERENT
391 && args->default_policy != KFD_IOC_CACHE_POLICY_NONCOHERENT) {
392 return -EINVAL;
393 }
394
395 if (args->alternate_policy != KFD_IOC_CACHE_POLICY_COHERENT
396 && args->alternate_policy != KFD_IOC_CACHE_POLICY_NONCOHERENT) {
397 return -EINVAL;
398 }
399
400 dev = kfd_device_by_id(args->gpu_id);
401 if (dev == NULL)
402 return -EINVAL;
403
404 mutex_lock(&p->mutex);
405
406 pdd = kfd_bind_process_to_device(dev, p);
407 if (IS_ERR(pdd)) {
408 err = -ESRCH;
409 goto out;
410 }
411
412 default_policy = (args->default_policy == KFD_IOC_CACHE_POLICY_COHERENT)
413 ? cache_policy_coherent : cache_policy_noncoherent;
414
415 alternate_policy =
416 (args->alternate_policy == KFD_IOC_CACHE_POLICY_COHERENT)
417 ? cache_policy_coherent : cache_policy_noncoherent;
418
419 if (!dev->dqm->ops.set_cache_memory_policy(dev->dqm,
420 &pdd->qpd,
421 default_policy,
422 alternate_policy,
423 (void __user *)args->alternate_aperture_base,
424 args->alternate_aperture_size))
425 err = -EINVAL;
426
427 out:
428 mutex_unlock(&p->mutex);
429
430 return err;
431 }
432
kfd_ioctl_get_clock_counters(struct file * filep,struct kfd_process * p,void * data)433 static int kfd_ioctl_get_clock_counters(struct file *filep,
434 struct kfd_process *p, void *data)
435 {
436 struct kfd_ioctl_get_clock_counters_args *args = data;
437 struct kfd_dev *dev;
438 struct timespec64 time;
439
440 dev = kfd_device_by_id(args->gpu_id);
441 if (dev == NULL)
442 return -EINVAL;
443
444 /* Reading GPU clock counter from KGD */
445 args->gpu_clock_counter =
446 dev->kfd2kgd->get_gpu_clock_counter(dev->kgd);
447
448 /* No access to rdtsc. Using raw monotonic time */
449 getrawmonotonic64(&time);
450 args->cpu_clock_counter = (uint64_t)timespec64_to_ns(&time);
451
452 get_monotonic_boottime64(&time);
453 args->system_clock_counter = (uint64_t)timespec64_to_ns(&time);
454
455 /* Since the counter is in nano-seconds we use 1GHz frequency */
456 args->system_clock_freq = 1000000000;
457
458 return 0;
459 }
460
461
kfd_ioctl_get_process_apertures(struct file * filp,struct kfd_process * p,void * data)462 static int kfd_ioctl_get_process_apertures(struct file *filp,
463 struct kfd_process *p, void *data)
464 {
465 struct kfd_ioctl_get_process_apertures_args *args = data;
466 struct kfd_process_device_apertures *pAperture;
467 struct kfd_process_device *pdd;
468
469 dev_dbg(kfd_device, "get apertures for PASID %d", p->pasid);
470
471 args->num_of_nodes = 0;
472
473 mutex_lock(&p->mutex);
474
475 /*if the process-device list isn't empty*/
476 if (kfd_has_process_device_data(p)) {
477 /* Run over all pdd of the process */
478 pdd = kfd_get_first_process_device_data(p);
479 do {
480 pAperture =
481 &args->process_apertures[args->num_of_nodes];
482 pAperture->gpu_id = pdd->dev->id;
483 pAperture->lds_base = pdd->lds_base;
484 pAperture->lds_limit = pdd->lds_limit;
485 pAperture->gpuvm_base = pdd->gpuvm_base;
486 pAperture->gpuvm_limit = pdd->gpuvm_limit;
487 pAperture->scratch_base = pdd->scratch_base;
488 pAperture->scratch_limit = pdd->scratch_limit;
489
490 dev_dbg(kfd_device,
491 "node id %u\n", args->num_of_nodes);
492 dev_dbg(kfd_device,
493 "gpu id %u\n", pdd->dev->id);
494 dev_dbg(kfd_device,
495 "lds_base %llX\n", pdd->lds_base);
496 dev_dbg(kfd_device,
497 "lds_limit %llX\n", pdd->lds_limit);
498 dev_dbg(kfd_device,
499 "gpuvm_base %llX\n", pdd->gpuvm_base);
500 dev_dbg(kfd_device,
501 "gpuvm_limit %llX\n", pdd->gpuvm_limit);
502 dev_dbg(kfd_device,
503 "scratch_base %llX\n", pdd->scratch_base);
504 dev_dbg(kfd_device,
505 "scratch_limit %llX\n", pdd->scratch_limit);
506
507 args->num_of_nodes++;
508 } while ((pdd = kfd_get_next_process_device_data(p, pdd)) != NULL &&
509 (args->num_of_nodes < NUM_OF_SUPPORTED_GPUS));
510 }
511
512 mutex_unlock(&p->mutex);
513
514 return 0;
515 }
516
517 #define AMDKFD_IOCTL_DEF(ioctl, _func, _flags) \
518 [_IOC_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, .cmd_drv = 0, .name = #ioctl}
519
520 /** Ioctl table */
521 static const struct amdkfd_ioctl_desc amdkfd_ioctls[] = {
522 AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_VERSION,
523 kfd_ioctl_get_version, 0),
524
525 AMDKFD_IOCTL_DEF(AMDKFD_IOC_CREATE_QUEUE,
526 kfd_ioctl_create_queue, 0),
527
528 AMDKFD_IOCTL_DEF(AMDKFD_IOC_DESTROY_QUEUE,
529 kfd_ioctl_destroy_queue, 0),
530
531 AMDKFD_IOCTL_DEF(AMDKFD_IOC_SET_MEMORY_POLICY,
532 kfd_ioctl_set_memory_policy, 0),
533
534 AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_CLOCK_COUNTERS,
535 kfd_ioctl_get_clock_counters, 0),
536
537 AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_PROCESS_APERTURES,
538 kfd_ioctl_get_process_apertures, 0),
539
540 AMDKFD_IOCTL_DEF(AMDKFD_IOC_UPDATE_QUEUE,
541 kfd_ioctl_update_queue, 0),
542 };
543
544 #define AMDKFD_CORE_IOCTL_COUNT ARRAY_SIZE(amdkfd_ioctls)
545
kfd_ioctl(struct file * filep,unsigned int cmd,unsigned long arg)546 static long kfd_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
547 {
548 struct kfd_process *process;
549 amdkfd_ioctl_t *func;
550 const struct amdkfd_ioctl_desc *ioctl = NULL;
551 unsigned int nr = _IOC_NR(cmd);
552 char stack_kdata[128];
553 char *kdata = NULL;
554 unsigned int usize, asize;
555 int retcode = -EINVAL;
556
557 if (nr >= AMDKFD_CORE_IOCTL_COUNT)
558 goto err_i1;
559
560 if ((nr >= AMDKFD_COMMAND_START) && (nr < AMDKFD_COMMAND_END)) {
561 u32 amdkfd_size;
562
563 ioctl = &amdkfd_ioctls[nr];
564
565 amdkfd_size = _IOC_SIZE(ioctl->cmd);
566 usize = asize = _IOC_SIZE(cmd);
567 if (amdkfd_size > asize)
568 asize = amdkfd_size;
569
570 cmd = ioctl->cmd;
571 } else
572 goto err_i1;
573
574 dev_dbg(kfd_device, "ioctl cmd 0x%x (#%d), arg 0x%lx\n", cmd, nr, arg);
575
576 process = kfd_get_process(current);
577 if (IS_ERR(process)) {
578 dev_dbg(kfd_device, "no process\n");
579 goto err_i1;
580 }
581
582 /* Do not trust userspace, use our own definition */
583 func = ioctl->func;
584
585 if (unlikely(!func)) {
586 dev_dbg(kfd_device, "no function\n");
587 retcode = -EINVAL;
588 goto err_i1;
589 }
590
591 if (cmd & (IOC_IN | IOC_OUT)) {
592 if (asize <= sizeof(stack_kdata)) {
593 kdata = stack_kdata;
594 } else {
595 kdata = kmalloc(asize, GFP_KERNEL);
596 if (!kdata) {
597 retcode = -ENOMEM;
598 goto err_i1;
599 }
600 }
601 if (asize > usize)
602 memset(kdata + usize, 0, asize - usize);
603 }
604
605 if (cmd & IOC_IN) {
606 if (copy_from_user(kdata, (void __user *)arg, usize) != 0) {
607 retcode = -EFAULT;
608 goto err_i1;
609 }
610 } else if (cmd & IOC_OUT) {
611 memset(kdata, 0, usize);
612 }
613
614 retcode = func(filep, process, kdata);
615
616 if (cmd & IOC_OUT)
617 if (copy_to_user((void __user *)arg, kdata, usize) != 0)
618 retcode = -EFAULT;
619
620 err_i1:
621 if (!ioctl)
622 dev_dbg(kfd_device, "invalid ioctl: pid=%d, cmd=0x%02x, nr=0x%02x\n",
623 task_pid_nr(current), cmd, nr);
624
625 if (kdata != stack_kdata)
626 kfree(kdata);
627
628 if (retcode)
629 dev_dbg(kfd_device, "ret = %d\n", retcode);
630
631 return retcode;
632 }
633
kfd_mmap(struct file * filp,struct vm_area_struct * vma)634 static int kfd_mmap(struct file *filp, struct vm_area_struct *vma)
635 {
636 struct kfd_process *process;
637
638 process = kfd_get_process(current);
639 if (IS_ERR(process))
640 return PTR_ERR(process);
641
642 return kfd_doorbell_mmap(process, vma);
643 }
644