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.
23 #include <linux/device.h>
24 #include <linux/export.h>
25 #include <linux/err.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>
34 #include <uapi/asm-generic/mman-common.h>
35 #include <asm/processor.h>
37 #include "kfd_device_queue_manager.h"
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 *);
43 static const char kfd_dev_name[] = "kfd";
45 static const struct file_operations kfd_fops = {
47 .unlocked_ioctl = kfd_ioctl,
48 .compat_ioctl = kfd_ioctl,
53 static int kfd_char_dev_major = -1;
54 static struct class *kfd_class;
55 struct device *kfd_device;
57 int kfd_chardev_init(void)
61 kfd_char_dev_major = register_chrdev(0, kfd_dev_name, &kfd_fops);
62 err = kfd_char_dev_major;
64 goto err_register_chrdev;
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;
71 kfd_device = device_create(kfd_class, NULL,
72 MKDEV(kfd_char_dev_major, 0),
74 err = PTR_ERR(kfd_device);
75 if (IS_ERR(kfd_device))
76 goto err_device_create;
81 class_destroy(kfd_class);
83 unregister_chrdev(kfd_char_dev_major, kfd_dev_name);
88 void kfd_chardev_exit(void)
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);
95 struct device *kfd_chardev(void)
101 static int kfd_open(struct inode *inode, struct file *filep)
103 struct kfd_process *process;
104 bool is_32bit_user_mode;
106 if (iminor(inode) != 0)
109 is_32bit_user_mode = is_compat_task();
111 if (is_32bit_user_mode == true) {
113 "Process %d (32-bit) failed to open /dev/kfd\n"
114 "32-bit processes are not supported by amdkfd\n",
119 process = kfd_create_process(current);
121 return PTR_ERR(process);
123 dev_dbg(kfd_device, "process %d opened, compat mode (32 bit) - %d\n",
124 process->pasid, process->is_32bit_user_mode);
129 static int kfd_ioctl_get_version(struct file *filep, struct kfd_process *p,
132 struct kfd_ioctl_get_version_args *args = data;
135 args->major_version = KFD_IOCTL_MAJOR_VERSION;
136 args->minor_version = KFD_IOCTL_MINOR_VERSION;
141 static int set_queue_properties_from_user(struct queue_properties *q_properties,
142 struct kfd_ioctl_create_queue_args *args)
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");
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");
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");
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");
167 if (!access_ok(VERIFY_WRITE,
168 (const void __user *) args->read_pointer_address,
170 pr_err("kfd: can't access read pointer\n");
174 if (!access_ok(VERIFY_WRITE,
175 (const void __user *) args->write_pointer_address,
177 pr_err("kfd: can't access write pointer\n");
181 q_properties->is_interop = false;
182 q_properties->queue_percent = args->queue_percentage;
183 q_properties->priority = args->queue_priority;
184 q_properties->queue_address = args->ring_base_address;
185 q_properties->queue_size = args->ring_size;
186 q_properties->read_ptr = (uint32_t *) args->read_pointer_address;
187 q_properties->write_ptr = (uint32_t *) args->write_pointer_address;
188 if (args->queue_type == KFD_IOC_QUEUE_TYPE_COMPUTE ||
189 args->queue_type == KFD_IOC_QUEUE_TYPE_COMPUTE_AQL)
190 q_properties->type = KFD_QUEUE_TYPE_COMPUTE;
194 if (args->queue_type == KFD_IOC_QUEUE_TYPE_COMPUTE_AQL)
195 q_properties->format = KFD_QUEUE_FORMAT_AQL;
197 q_properties->format = KFD_QUEUE_FORMAT_PM4;
199 pr_debug("Queue Percentage (%d, %d)\n",
200 q_properties->queue_percent, args->queue_percentage);
202 pr_debug("Queue Priority (%d, %d)\n",
203 q_properties->priority, args->queue_priority);
205 pr_debug("Queue Address (0x%llX, 0x%llX)\n",
206 q_properties->queue_address, args->ring_base_address);
208 pr_debug("Queue Size (0x%llX, %u)\n",
209 q_properties->queue_size, args->ring_size);
211 pr_debug("Queue r/w Pointers (0x%llX, 0x%llX)\n",
212 (uint64_t) q_properties->read_ptr,
213 (uint64_t) q_properties->write_ptr);
215 pr_debug("Queue Format (%d)\n", q_properties->format);
220 static int kfd_ioctl_create_queue(struct file *filep, struct kfd_process *p,
223 struct kfd_ioctl_create_queue_args *args = data;
226 unsigned int queue_id;
227 struct kfd_process_device *pdd;
228 struct queue_properties q_properties;
230 memset(&q_properties, 0, sizeof(struct queue_properties));
232 pr_debug("kfd: creating queue ioctl\n");
234 err = set_queue_properties_from_user(&q_properties, args);
238 dev = kfd_device_by_id(args->gpu_id);
242 mutex_lock(&p->mutex);
244 pdd = kfd_bind_process_to_device(dev, p);
247 goto err_bind_process;
250 pr_debug("kfd: creating queue for PASID %d on GPU 0x%x\n",
254 err = pqm_create_queue(&p->pqm, dev, filep, &q_properties, 0,
255 KFD_QUEUE_TYPE_COMPUTE, &queue_id);
257 goto err_create_queue;
259 args->queue_id = queue_id;
261 /* Return gpu_id as doorbell offset for mmap usage */
262 args->doorbell_offset = args->gpu_id << PAGE_SHIFT;
264 mutex_unlock(&p->mutex);
266 pr_debug("kfd: queue id %d was created successfully\n", args->queue_id);
268 pr_debug("ring buffer address == 0x%016llX\n",
269 args->ring_base_address);
271 pr_debug("read ptr address == 0x%016llX\n",
272 args->read_pointer_address);
274 pr_debug("write ptr address == 0x%016llX\n",
275 args->write_pointer_address);
281 mutex_unlock(&p->mutex);
285 static int kfd_ioctl_destroy_queue(struct file *filp, struct kfd_process *p,
289 struct kfd_ioctl_destroy_queue_args *args = data;
291 pr_debug("kfd: destroying queue id %d for PASID %d\n",
295 mutex_lock(&p->mutex);
297 retval = pqm_destroy_queue(&p->pqm, args->queue_id);
299 mutex_unlock(&p->mutex);
303 static int kfd_ioctl_update_queue(struct file *filp, struct kfd_process *p,
307 struct kfd_ioctl_update_queue_args *args = data;
308 struct queue_properties properties;
310 if (args->queue_percentage > KFD_MAX_QUEUE_PERCENTAGE) {
311 pr_err("kfd: queue percentage must be between 0 to KFD_MAX_QUEUE_PERCENTAGE\n");
315 if (args->queue_priority > KFD_MAX_QUEUE_PRIORITY) {
316 pr_err("kfd: queue priority must be between 0 to KFD_MAX_QUEUE_PRIORITY\n");
320 if ((args->ring_base_address) &&
321 (!access_ok(VERIFY_WRITE,
322 (const void __user *) args->ring_base_address,
323 sizeof(uint64_t)))) {
324 pr_err("kfd: can't access ring base address\n");
328 if (!is_power_of_2(args->ring_size) && (args->ring_size != 0)) {
329 pr_err("kfd: ring size must be a power of 2 or 0\n");
333 properties.queue_address = args->ring_base_address;
334 properties.queue_size = args->ring_size;
335 properties.queue_percent = args->queue_percentage;
336 properties.priority = args->queue_priority;
338 pr_debug("kfd: updating queue id %d for PASID %d\n",
339 args->queue_id, p->pasid);
341 mutex_lock(&p->mutex);
343 retval = pqm_update_queue(&p->pqm, args->queue_id, &properties);
345 mutex_unlock(&p->mutex);
350 static int kfd_ioctl_set_memory_policy(struct file *filep,
351 struct kfd_process *p, void *data)
353 struct kfd_ioctl_set_memory_policy_args *args = data;
356 struct kfd_process_device *pdd;
357 enum cache_policy default_policy, alternate_policy;
359 if (args->default_policy != KFD_IOC_CACHE_POLICY_COHERENT
360 && args->default_policy != KFD_IOC_CACHE_POLICY_NONCOHERENT) {
364 if (args->alternate_policy != KFD_IOC_CACHE_POLICY_COHERENT
365 && args->alternate_policy != KFD_IOC_CACHE_POLICY_NONCOHERENT) {
369 dev = kfd_device_by_id(args->gpu_id);
373 mutex_lock(&p->mutex);
375 pdd = kfd_bind_process_to_device(dev, p);
381 default_policy = (args->default_policy == KFD_IOC_CACHE_POLICY_COHERENT)
382 ? cache_policy_coherent : cache_policy_noncoherent;
385 (args->alternate_policy == KFD_IOC_CACHE_POLICY_COHERENT)
386 ? cache_policy_coherent : cache_policy_noncoherent;
388 if (!dev->dqm->set_cache_memory_policy(dev->dqm,
392 (void __user *)args->alternate_aperture_base,
393 args->alternate_aperture_size))
397 mutex_unlock(&p->mutex);
402 static int kfd_ioctl_get_clock_counters(struct file *filep,
403 struct kfd_process *p, void *data)
405 struct kfd_ioctl_get_clock_counters_args *args = data;
407 struct timespec time;
409 dev = kfd_device_by_id(args->gpu_id);
413 /* Reading GPU clock counter from KGD */
414 args->gpu_clock_counter = kfd2kgd->get_gpu_clock_counter(dev->kgd);
416 /* No access to rdtsc. Using raw monotonic time */
417 getrawmonotonic(&time);
418 args->cpu_clock_counter = (uint64_t)timespec_to_ns(&time);
420 get_monotonic_boottime(&time);
421 args->system_clock_counter = (uint64_t)timespec_to_ns(&time);
423 /* Since the counter is in nano-seconds we use 1GHz frequency */
424 args->system_clock_freq = 1000000000;
430 static int kfd_ioctl_get_process_apertures(struct file *filp,
431 struct kfd_process *p, void *data)
433 struct kfd_ioctl_get_process_apertures_args *args = data;
434 struct kfd_process_device_apertures *pAperture;
435 struct kfd_process_device *pdd;
437 dev_dbg(kfd_device, "get apertures for PASID %d", p->pasid);
439 args->num_of_nodes = 0;
441 mutex_lock(&p->mutex);
443 /*if the process-device list isn't empty*/
444 if (kfd_has_process_device_data(p)) {
445 /* Run over all pdd of the process */
446 pdd = kfd_get_first_process_device_data(p);
449 &args->process_apertures[args->num_of_nodes];
450 pAperture->gpu_id = pdd->dev->id;
451 pAperture->lds_base = pdd->lds_base;
452 pAperture->lds_limit = pdd->lds_limit;
453 pAperture->gpuvm_base = pdd->gpuvm_base;
454 pAperture->gpuvm_limit = pdd->gpuvm_limit;
455 pAperture->scratch_base = pdd->scratch_base;
456 pAperture->scratch_limit = pdd->scratch_limit;
459 "node id %u\n", args->num_of_nodes);
461 "gpu id %u\n", pdd->dev->id);
463 "lds_base %llX\n", pdd->lds_base);
465 "lds_limit %llX\n", pdd->lds_limit);
467 "gpuvm_base %llX\n", pdd->gpuvm_base);
469 "gpuvm_limit %llX\n", pdd->gpuvm_limit);
471 "scratch_base %llX\n", pdd->scratch_base);
473 "scratch_limit %llX\n", pdd->scratch_limit);
475 args->num_of_nodes++;
476 } while ((pdd = kfd_get_next_process_device_data(p, pdd)) != NULL &&
477 (args->num_of_nodes < NUM_OF_SUPPORTED_GPUS));
480 mutex_unlock(&p->mutex);
485 #define AMDKFD_IOCTL_DEF(ioctl, _func, _flags) \
486 [_IOC_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, .cmd_drv = 0, .name = #ioctl}
489 static const struct amdkfd_ioctl_desc amdkfd_ioctls[] = {
490 AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_VERSION,
491 kfd_ioctl_get_version, 0),
493 AMDKFD_IOCTL_DEF(AMDKFD_IOC_CREATE_QUEUE,
494 kfd_ioctl_create_queue, 0),
496 AMDKFD_IOCTL_DEF(AMDKFD_IOC_DESTROY_QUEUE,
497 kfd_ioctl_destroy_queue, 0),
499 AMDKFD_IOCTL_DEF(AMDKFD_IOC_SET_MEMORY_POLICY,
500 kfd_ioctl_set_memory_policy, 0),
502 AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_CLOCK_COUNTERS,
503 kfd_ioctl_get_clock_counters, 0),
505 AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_PROCESS_APERTURES,
506 kfd_ioctl_get_process_apertures, 0),
508 AMDKFD_IOCTL_DEF(AMDKFD_IOC_UPDATE_QUEUE,
509 kfd_ioctl_update_queue, 0),
512 #define AMDKFD_CORE_IOCTL_COUNT ARRAY_SIZE(amdkfd_ioctls)
514 static long kfd_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
516 struct kfd_process *process;
517 amdkfd_ioctl_t *func;
518 const struct amdkfd_ioctl_desc *ioctl = NULL;
519 unsigned int nr = _IOC_NR(cmd);
520 char stack_kdata[128];
522 unsigned int usize, asize;
523 int retcode = -EINVAL;
525 if (nr >= AMDKFD_CORE_IOCTL_COUNT)
528 if ((nr >= AMDKFD_COMMAND_START) && (nr < AMDKFD_COMMAND_END)) {
531 ioctl = &amdkfd_ioctls[nr];
533 amdkfd_size = _IOC_SIZE(ioctl->cmd);
534 usize = asize = _IOC_SIZE(cmd);
535 if (amdkfd_size > asize)
542 dev_dbg(kfd_device, "ioctl cmd 0x%x (#%d), arg 0x%lx\n", cmd, nr, arg);
544 process = kfd_get_process(current);
545 if (IS_ERR(process)) {
546 dev_dbg(kfd_device, "no process\n");
550 /* Do not trust userspace, use our own definition */
553 if (unlikely(!func)) {
554 dev_dbg(kfd_device, "no function\n");
559 if (cmd & (IOC_IN | IOC_OUT)) {
560 if (asize <= sizeof(stack_kdata)) {
563 kdata = kmalloc(asize, GFP_KERNEL);
570 memset(kdata + usize, 0, asize - usize);
574 if (copy_from_user(kdata, (void __user *)arg, usize) != 0) {
578 } else if (cmd & IOC_OUT) {
579 memset(kdata, 0, usize);
582 retcode = func(filep, process, kdata);
585 if (copy_to_user((void __user *)arg, kdata, usize) != 0)
590 dev_dbg(kfd_device, "invalid ioctl: pid=%d, cmd=0x%02x, nr=0x%02x\n",
591 task_pid_nr(current), cmd, nr);
593 if (kdata != stack_kdata)
597 dev_dbg(kfd_device, "ret = %d\n", retcode);
602 static int kfd_mmap(struct file *filp, struct vm_area_struct *vma)
604 struct kfd_process *process;
606 process = kfd_get_process(current);
608 return PTR_ERR(process);
610 return kfd_doorbell_mmap(process, vma);