[linux-2.6-block.git] / drivers / gpu / drm / amd / amdkfd / kfd_chardev.c

/*
 * Copyright 2014 Advanced Micro Devices, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

#include <linux/device.h>
#include <linux/export.h>
#include <linux/err.h>
#include <linux/fs.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/compat.h>
#include <uapi/linux/kfd_ioctl.h>
#include <linux/time.h>
#include <linux/mm.h>
#include <linux/uaccess.h>
#include <uapi/asm-generic/mman-common.h>
#include <asm/processor.h>
#include "kfd_priv.h"
#include "kfd_device_queue_manager.h"

static long kfd_ioctl(struct file *, unsigned int, unsigned long);
static int kfd_open(struct inode *, struct file *);
static int kfd_mmap(struct file *, struct vm_area_struct *);

static const char kfd_dev_name[] = "kfd";

static const struct file_operations kfd_fops = {
	.owner = THIS_MODULE,
	.unlocked_ioctl = kfd_ioctl,
	.compat_ioctl = kfd_ioctl,
	.open = kfd_open,
	.mmap = kfd_mmap,
};

static int kfd_char_dev_major = -1;
static struct class *kfd_class;
struct device *kfd_device;

int kfd_chardev_init(void)
{
	int err = 0;

	kfd_char_dev_major = register_chrdev(0, kfd_dev_name, &kfd_fops);
	err = kfd_char_dev_major;
	if (err < 0)
		goto err_register_chrdev;

	kfd_class = class_create(THIS_MODULE, kfd_dev_name);
	err = PTR_ERR(kfd_class);
	if (IS_ERR(kfd_class))
		goto err_class_create;

	kfd_device = device_create(kfd_class, NULL,
					MKDEV(kfd_char_dev_major, 0),
					NULL, kfd_dev_name);
	err = PTR_ERR(kfd_device);
	if (IS_ERR(kfd_device))
		goto err_device_create;

	return 0;

err_device_create:
	class_destroy(kfd_class);
err_class_create:
	unregister_chrdev(kfd_char_dev_major, kfd_dev_name);
err_register_chrdev:
	return err;
}

void kfd_chardev_exit(void)
{
	device_destroy(kfd_class, MKDEV(kfd_char_dev_major, 0));
	class_destroy(kfd_class);
	unregister_chrdev(kfd_char_dev_major, kfd_dev_name);
}

struct device *kfd_chardev(void)
{
	return kfd_device;
}


static int kfd_open(struct inode *inode, struct file *filep)
{
	struct kfd_process *process;

	if (iminor(inode) != 0)
		return -ENODEV;

	process = kfd_create_process(current);
	if (IS_ERR(process))
		return PTR_ERR(process);

	process->is_32bit_user_mode = is_compat_task();

	dev_dbg(kfd_device, "process %d opened, compat mode (32 bit) - %d\n",
		process->pasid, process->is_32bit_user_mode);

	kfd_init_apertures(process);

	return 0;
}

static long kfd_ioctl_get_version(struct file *filep, struct kfd_process *p,
					void __user *arg)
{
	return -ENODEV;
}

static int set_queue_properties_from_user(struct queue_properties *q_properties,
				struct kfd_ioctl_create_queue_args *args)
{
	if (args->queue_percentage > KFD_MAX_QUEUE_PERCENTAGE) {
		pr_err("kfd: queue percentage must be between 0 to KFD_MAX_QUEUE_PERCENTAGE\n");
		return -EINVAL;
	}

	if (args->queue_priority > KFD_MAX_QUEUE_PRIORITY) {
		pr_err("kfd: queue priority must be between 0 to KFD_MAX_QUEUE_PRIORITY\n");
		return -EINVAL;
	}

	if ((args->ring_base_address) &&
		(!access_ok(VERIFY_WRITE, args->ring_base_address, sizeof(uint64_t)))) {
		pr_err("kfd: can't access ring base address\n");
		return -EFAULT;
	}

	if (!is_power_of_2(args->ring_size) && (args->ring_size != 0)) {
		pr_err("kfd: ring size must be a power of 2 or 0\n");
		return -EINVAL;
	}

	if (!access_ok(VERIFY_WRITE, args->read_pointer_address, sizeof(uint32_t))) {
		pr_err("kfd: can't access read pointer\n");
		return -EFAULT;
	}

	if (!access_ok(VERIFY_WRITE, args->write_pointer_address, sizeof(uint32_t))) {
		pr_err("kfd: can't access write pointer\n");
		return -EFAULT;
	}

	q_properties->is_interop = false;
	q_properties->queue_percent = args->queue_percentage;
	q_properties->priority = args->queue_priority;
	q_properties->queue_address = args->ring_base_address;
	q_properties->queue_size = args->ring_size;
	q_properties->read_ptr = (uint32_t *) args->read_pointer_address;
	q_properties->write_ptr = (uint32_t *) args->write_pointer_address;
	if (args->queue_type == KFD_IOC_QUEUE_TYPE_COMPUTE ||
		args->queue_type == KFD_IOC_QUEUE_TYPE_COMPUTE_AQL)
		q_properties->type = KFD_QUEUE_TYPE_COMPUTE;
	else
		return -ENOTSUPP;

	if (args->queue_type == KFD_IOC_QUEUE_TYPE_COMPUTE_AQL)
		q_properties->format = KFD_QUEUE_FORMAT_AQL;
	else
		q_properties->format = KFD_QUEUE_FORMAT_PM4;

	pr_debug("Queue Percentage (%d, %d)\n",
			q_properties->queue_percent, args->queue_percentage);

	pr_debug("Queue Priority (%d, %d)\n",
			q_properties->priority, args->queue_priority);

	pr_debug("Queue Address (0x%llX, 0x%llX)\n",
			q_properties->queue_address, args->ring_base_address);

	pr_debug("Queue Size (0x%llX, %u)\n",
			q_properties->queue_size, args->ring_size);

	pr_debug("Queue r/w Pointers (0x%llX, 0x%llX)\n",
			(uint64_t) q_properties->read_ptr,
			(uint64_t) q_properties->write_ptr);

	pr_debug("Queue Format (%d)\n", q_properties->format);

	return 0;
}

static long kfd_ioctl_create_queue(struct file *filep, struct kfd_process *p,
					void __user *arg)
{
	struct kfd_ioctl_create_queue_args args;
	struct kfd_dev *dev;
	int err = 0;
	unsigned int queue_id;
	struct kfd_process_device *pdd;
	struct queue_properties q_properties;

	memset(&q_properties, 0, sizeof(struct queue_properties));

	if (copy_from_user(&args, arg, sizeof(args)))
		return -EFAULT;

	pr_debug("kfd: creating queue ioctl\n");

	err = set_queue_properties_from_user(&q_properties, &args);
	if (err)
		return err;

	dev = kfd_device_by_id(args.gpu_id);
	if (dev == NULL)
		return -EINVAL;

	mutex_lock(&p->mutex);

	pdd = kfd_bind_process_to_device(dev, p);
	if (IS_ERR(pdd) < 0) {
		err = PTR_ERR(pdd);
		goto err_bind_process;
	}

	pr_debug("kfd: creating queue for PASID %d on GPU 0x%x\n",
			p->pasid,
			dev->id);

	err = pqm_create_queue(&p->pqm, dev, filep, &q_properties, 0,
				KFD_QUEUE_TYPE_COMPUTE, &queue_id);
	if (err != 0)
		goto err_create_queue;

	args.queue_id = queue_id;

	/* Return gpu_id as doorbell offset for mmap usage */
	args.doorbell_offset = args.gpu_id << PAGE_SHIFT;

	if (copy_to_user(arg, &args, sizeof(args))) {
		err = -EFAULT;
		goto err_copy_args_out;
	}

	mutex_unlock(&p->mutex);

	pr_debug("kfd: queue id %d was created successfully\n", args.queue_id);

	pr_debug("ring buffer address == 0x%016llX\n",
			args.ring_base_address);

	pr_debug("read ptr address    == 0x%016llX\n",
			args.read_pointer_address);

	pr_debug("write ptr address   == 0x%016llX\n",
			args.write_pointer_address);

	return 0;

err_copy_args_out:
	pqm_destroy_queue(&p->pqm, queue_id);
err_create_queue:
err_bind_process:
	mutex_unlock(&p->mutex);
	return err;
}

static int kfd_ioctl_destroy_queue(struct file *filp, struct kfd_process *p,
					void __user *arg)
{
	int retval;
	struct kfd_ioctl_destroy_queue_args args;

	if (copy_from_user(&args, arg, sizeof(args)))
		return -EFAULT;

	pr_debug("kfd: destroying queue id %d for PASID %d\n",
				args.queue_id,
				p->pasid);

	mutex_lock(&p->mutex);

	retval = pqm_destroy_queue(&p->pqm, args.queue_id);

	mutex_unlock(&p->mutex);
	return retval;
}

static int kfd_ioctl_update_queue(struct file *filp, struct kfd_process *p,
					void __user *arg)
{
	int retval;
	struct kfd_ioctl_update_queue_args args;
	struct queue_properties properties;

	if (copy_from_user(&args, arg, sizeof(args)))
		return -EFAULT;

	if (args.queue_percentage > KFD_MAX_QUEUE_PERCENTAGE) {
		pr_err("kfd: queue percentage must be between 0 to KFD_MAX_QUEUE_PERCENTAGE\n");
		return -EINVAL;
	}

	if (args.queue_priority > KFD_MAX_QUEUE_PRIORITY) {
		pr_err("kfd: queue priority must be between 0 to KFD_MAX_QUEUE_PRIORITY\n");
		return -EINVAL;
	}

	if ((args.ring_base_address) &&
		(!access_ok(VERIFY_WRITE, args.ring_base_address, sizeof(uint64_t)))) {
		pr_err("kfd: can't access ring base address\n");
		return -EFAULT;
	}

	if (!is_power_of_2(args.ring_size) && (args.ring_size != 0)) {
		pr_err("kfd: ring size must be a power of 2 or 0\n");
		return -EINVAL;
	}

	properties.queue_address = args.ring_base_address;
	properties.queue_size = args.ring_size;
	properties.queue_percent = args.queue_percentage;
	properties.priority = args.queue_priority;

	pr_debug("kfd: updating queue id %d for PASID %d\n",
			args.queue_id, p->pasid);

	mutex_lock(&p->mutex);

	retval = pqm_update_queue(&p->pqm, args.queue_id, &properties);

	mutex_unlock(&p->mutex);

	return retval;
}

static long kfd_ioctl_set_memory_policy(struct file *filep,
				struct kfd_process *p, void __user *arg)
{
	struct kfd_ioctl_set_memory_policy_args args;
	struct kfd_dev *dev;
	int err = 0;
	struct kfd_process_device *pdd;
	enum cache_policy default_policy, alternate_policy;

	if (copy_from_user(&args, arg, sizeof(args)))
		return -EFAULT;

	if (args.default_policy != KFD_IOC_CACHE_POLICY_COHERENT
	    && args.default_policy != KFD_IOC_CACHE_POLICY_NONCOHERENT) {
		return -EINVAL;
	}

	if (args.alternate_policy != KFD_IOC_CACHE_POLICY_COHERENT
	    && args.alternate_policy != KFD_IOC_CACHE_POLICY_NONCOHERENT) {
		return -EINVAL;
	}

	dev = kfd_device_by_id(args.gpu_id);
	if (dev == NULL)
		return -EINVAL;

	mutex_lock(&p->mutex);

	pdd = kfd_bind_process_to_device(dev, p);
	if (IS_ERR(pdd) < 0) {
		err = PTR_ERR(pdd);
		goto out;
	}

	default_policy = (args.default_policy == KFD_IOC_CACHE_POLICY_COHERENT)
			 ? cache_policy_coherent : cache_policy_noncoherent;

	alternate_policy =
		(args.alternate_policy == KFD_IOC_CACHE_POLICY_COHERENT)
		   ? cache_policy_coherent : cache_policy_noncoherent;

	if (!dev->dqm->set_cache_memory_policy(dev->dqm,
				&pdd->qpd,
				default_policy,
				alternate_policy,
				(void __user *)args.alternate_aperture_base,
				args.alternate_aperture_size))
		err = -EINVAL;

out:
	mutex_unlock(&p->mutex);

	return err;
}

static long kfd_ioctl_get_clock_counters(struct file *filep,
				struct kfd_process *p, void __user *arg)
{
	struct kfd_ioctl_get_clock_counters_args args;
	struct kfd_dev *dev;
	struct timespec time;

	if (copy_from_user(&args, arg, sizeof(args)))
		return -EFAULT;

	dev = kfd_device_by_id(args.gpu_id);
	if (dev == NULL)
		return -EINVAL;

	/* Reading GPU clock counter from KGD */
	args.gpu_clock_counter = kfd2kgd->get_gpu_clock_counter(dev->kgd);

	/* No access to rdtsc. Using raw monotonic time */
	getrawmonotonic(&time);
	args.cpu_clock_counter = (uint64_t)timespec_to_ns(&time);

	get_monotonic_boottime(&time);
	args.system_clock_counter = (uint64_t)timespec_to_ns(&time);

	/* Since the counter is in nano-seconds we use 1GHz frequency */
	args.system_clock_freq = 1000000000;

	if (copy_to_user(arg, &args, sizeof(args)))
		return -EFAULT;

	return 0;
}


static int kfd_ioctl_get_process_apertures(struct file *filp,
				struct kfd_process *p, void __user *arg)
{
	return -ENODEV;
}

static long kfd_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
{
	struct kfd_process *process;
	long err = -EINVAL;

	dev_dbg(kfd_device,
		"ioctl cmd 0x%x (#%d), arg 0x%lx\n",
		cmd, _IOC_NR(cmd), arg);

	process = kfd_get_process(current);
	if (IS_ERR(process))
		return PTR_ERR(process);

	switch (cmd) {
	case KFD_IOC_GET_VERSION:
		err = kfd_ioctl_get_version(filep, process, (void __user *)arg);
		break;
	case KFD_IOC_CREATE_QUEUE:
		err = kfd_ioctl_create_queue(filep, process,
						(void __user *)arg);
		break;

	case KFD_IOC_DESTROY_QUEUE:
		err = kfd_ioctl_destroy_queue(filep, process,
						(void __user *)arg);
		break;

	case KFD_IOC_SET_MEMORY_POLICY:
		err = kfd_ioctl_set_memory_policy(filep, process,
						(void __user *)arg);
		break;

	case KFD_IOC_GET_CLOCK_COUNTERS:
		err = kfd_ioctl_get_clock_counters(filep, process,
						(void __user *)arg);
		break;

	case KFD_IOC_GET_PROCESS_APERTURES:
		err = kfd_ioctl_get_process_apertures(filep, process,
						(void __user *)arg);
		break;

	case KFD_IOC_UPDATE_QUEUE:
		err = kfd_ioctl_update_queue(filep, process,
						(void __user *)arg);
		break;

	default:
		dev_err(kfd_device,
			"unknown ioctl cmd 0x%x, arg 0x%lx)\n",
			cmd, arg);
		err = -EINVAL;
		break;
	}

	if (err < 0)
		dev_err(kfd_device,
			"ioctl error %ld for ioctl cmd 0x%x (#%d)\n",
			err, cmd, _IOC_NR(cmd));

	return err;
}

static int kfd_mmap(struct file *filp, struct vm_area_struct *vma)
{
	struct kfd_process *process;

	process = kfd_get_process(current);
	if (IS_ERR(process))
		return PTR_ERR(process);

	return kfd_doorbell_mmap(process, vma);
}
Commit	Line	Data
4a488a7a OG	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 <linux/uaccess.h>
	35	#include <uapi/asm-generic/mman-common.h>
	36	#include <asm/processor.h>
	37	#include "kfd_priv.h"
41a286fa	38	#include "kfd_device_queue_manager.h"
4a488a7a OG	39
	40	static long kfd_ioctl(struct file *, unsigned int, unsigned long);
	41	static int kfd_open(struct inode , struct file );
19f6d2a6	42	static int kfd_mmap(struct file , struct vm_area_struct );
4a488a7a OG	43
	44	static const char kfd_dev_name[] = "kfd";
	45
	46	static const struct file_operations kfd_fops = {
	47	.owner = THIS_MODULE,
	48	.unlocked_ioctl = kfd_ioctl,
	49	.compat_ioctl = kfd_ioctl,
	50	.open = kfd_open,
19f6d2a6	51	.mmap = kfd_mmap,
4a488a7a OG	52	};
	53
	54	static int kfd_char_dev_major = -1;
	55	static struct class *kfd_class;
	56	struct device *kfd_device;
	57
	58	int kfd_chardev_init(void)
	59	{
	60	int err = 0;
	61
	62	kfd_char_dev_major = register_chrdev(0, kfd_dev_name, &kfd_fops);
	63	err = kfd_char_dev_major;
	64	if (err < 0)
	65	goto err_register_chrdev;
	66
	67	kfd_class = class_create(THIS_MODULE, kfd_dev_name);
	68	err = PTR_ERR(kfd_class);
	69	if (IS_ERR(kfd_class))
	70	goto err_class_create;
	71
	72	kfd_device = device_create(kfd_class, NULL,
	73	MKDEV(kfd_char_dev_major, 0),
	74	NULL, kfd_dev_name);
	75	err = PTR_ERR(kfd_device);
	76	if (IS_ERR(kfd_device))
	77	goto err_device_create;
	78
	79	return 0;
	80
	81	err_device_create:
	82	class_destroy(kfd_class);
	83	err_class_create:
	84	unregister_chrdev(kfd_char_dev_major, kfd_dev_name);
	85	err_register_chrdev:
	86	return err;
	87	}
	88
	89	void kfd_chardev_exit(void)
	90	{
	91	device_destroy(kfd_class, MKDEV(kfd_char_dev_major, 0));
	92	class_destroy(kfd_class);
	93	unregister_chrdev(kfd_char_dev_major, kfd_dev_name);
	94	}
	95
	96	struct device *kfd_chardev(void)
	97	{
	98	return kfd_device;
	99	}
	100
	101
	102	static int kfd_open(struct inode inode, struct file filep)
	103	{
19f6d2a6 OG	104	struct kfd_process *process;
19f6d2a6 OG	105
4a488a7a OG	106	if (iminor(inode) != 0)
	107	return -ENODEV;
	108
19f6d2a6 OG	109	process = kfd_create_process(current);
	110	if (IS_ERR(process))
	111	return PTR_ERR(process);
	112
	113	process->is_32bit_user_mode = is_compat_task();
	114
	115	dev_dbg(kfd_device, "process %d opened, compat mode (32 bit) - %d\n",
	116	process->pasid, process->is_32bit_user_mode);
	117
	118	kfd_init_apertures(process);
	119
4a488a7a OG	120	return 0;
	121	}
	122
	123	static long kfd_ioctl_get_version(struct file filep, struct kfd_process p,
	124	void __user *arg)
	125	{
	126	return -ENODEV;
	127	}
	128
39b027d9 OG	129	static int set_queue_properties_from_user(struct queue_properties *q_properties,
	130	struct kfd_ioctl_create_queue_args *args)
	131	{
	132	if (args->queue_percentage > KFD_MAX_QUEUE_PERCENTAGE) {
	133	pr_err("kfd: queue percentage must be between 0 to KFD_MAX_QUEUE_PERCENTAGE\n");
	134	return -EINVAL;
	135	}
	136
	137	if (args->queue_priority > KFD_MAX_QUEUE_PRIORITY) {
	138	pr_err("kfd: queue priority must be between 0 to KFD_MAX_QUEUE_PRIORITY\n");
	139	return -EINVAL;
	140	}
	141
	142	if ((args->ring_base_address) &&
	143	(!access_ok(VERIFY_WRITE, args->ring_base_address, sizeof(uint64_t)))) {
	144	pr_err("kfd: can't access ring base address\n");
	145	return -EFAULT;
	146	}
	147
	148	if (!is_power_of_2(args->ring_size) && (args->ring_size != 0)) {
	149	pr_err("kfd: ring size must be a power of 2 or 0\n");
	150	return -EINVAL;
	151	}
	152
	153	if (!access_ok(VERIFY_WRITE, args->read_pointer_address, sizeof(uint32_t))) {
	154	pr_err("kfd: can't access read pointer\n");
	155	return -EFAULT;
	156	}
	157
	158	if (!access_ok(VERIFY_WRITE, args->write_pointer_address, sizeof(uint32_t))) {
	159	pr_err("kfd: can't access write pointer\n");
	160	return -EFAULT;
	161	}
	162
	163	q_properties->is_interop = false;
	164	q_properties->queue_percent = args->queue_percentage;
	165	q_properties->priority = args->queue_priority;
	166	q_properties->queue_address = args->ring_base_address;
	167	q_properties->queue_size = args->ring_size;
	168	q_properties->read_ptr = (uint32_t *) args->read_pointer_address;
	169	q_properties->write_ptr = (uint32_t *) args->write_pointer_address;
	170	if (args->queue_type == KFD_IOC_QUEUE_TYPE_COMPUTE \|\|
	171	args->queue_type == KFD_IOC_QUEUE_TYPE_COMPUTE_AQL)
	172	q_properties->type = KFD_QUEUE_TYPE_COMPUTE;
	173	else
	174	return -ENOTSUPP;
	175
	176	if (args->queue_type == KFD_IOC_QUEUE_TYPE_COMPUTE_AQL)
	177	q_properties->format = KFD_QUEUE_FORMAT_AQL;
	178	else
	179	q_properties->format = KFD_QUEUE_FORMAT_PM4;
	180
	181	pr_debug("Queue Percentage (%d, %d)\n",
	182	q_properties->queue_percent, args->queue_percentage);
	183
	184	pr_debug("Queue Priority (%d, %d)\n",
	185	q_properties->priority, args->queue_priority);
	186
	187	pr_debug("Queue Address (0x%llX, 0x%llX)\n",
	188	q_properties->queue_address, args->ring_base_address);
	189
	190	pr_debug("Queue Size (0x%llX, %u)\n",
	191	q_properties->queue_size, args->ring_size);
	192
193	pr_debug("Queue r/w Pointers (0x%llX, 0x%llX)\n",
194	(uint64_t) q_properties->read_ptr,
195	(uint64_t) q_properties->write_ptr);
196
197	pr_debug("Queue Format (%d)\n", q_properties->format);
198
199	return 0;
200	}
201
4a488a7a OG	202	static long kfd_ioctl_create_queue(struct file filep, struct kfd_process p,
	203	void __user *arg)
	204	{
39b027d9 OG	205	struct kfd_ioctl_create_queue_args args;
	206	struct kfd_dev *dev;
	207	int err = 0;
	208	unsigned int queue_id;
	209	struct kfd_process_device *pdd;
	210	struct queue_properties q_properties;
	211
	212	memset(&q_properties, 0, sizeof(struct queue_properties));
	213
	214	if (copy_from_user(&args, arg, sizeof(args)))
	215	return -EFAULT;
	216
	217	pr_debug("kfd: creating queue ioctl\n");
	218
	219	err = set_queue_properties_from_user(&q_properties, &args);
	220	if (err)
	221	return err;
	222
	223	dev = kfd_device_by_id(args.gpu_id);
	224	if (dev == NULL)
	225	return -EINVAL;
	226
	227	mutex_lock(&p->mutex);
	228
	229	pdd = kfd_bind_process_to_device(dev, p);
	230	if (IS_ERR(pdd) < 0) {
	231	err = PTR_ERR(pdd);
	232	goto err_bind_process;
	233	}
	234
	235	pr_debug("kfd: creating queue for PASID %d on GPU 0x%x\n",
	236	p->pasid,
	237	dev->id);
	238
	239	err = pqm_create_queue(&p->pqm, dev, filep, &q_properties, 0,
	240	KFD_QUEUE_TYPE_COMPUTE, &queue_id);
	241	if (err != 0)
	242	goto err_create_queue;
	243
	244	args.queue_id = queue_id;
	245
	246	/* Return gpu_id as doorbell offset for mmap usage */
	247	args.doorbell_offset = args.gpu_id << PAGE_SHIFT;
	248
	249	if (copy_to_user(arg, &args, sizeof(args))) {
	250	err = -EFAULT;
	251	goto err_copy_args_out;
	252	}
	253
	254	mutex_unlock(&p->mutex);
	255
	256	pr_debug("kfd: queue id %d was created successfully\n", args.queue_id);
	257
	258	pr_debug("ring buffer address == 0x%016llX\n",
	259	args.ring_base_address);
	260
	261	pr_debug("read ptr address == 0x%016llX\n",
	262	args.read_pointer_address);
	263
	264	pr_debug("write ptr address == 0x%016llX\n",
	265	args.write_pointer_address);
	266
	267	return 0;
	268
269	err_copy_args_out:
270	pqm_destroy_queue(&p->pqm, queue_id);
271	err_create_queue:
272	err_bind_process:
273	mutex_unlock(&p->mutex);
274	return err;
4a488a7a OG	275	}
	276
	277	static int kfd_ioctl_destroy_queue(struct file filp, struct kfd_process p,
	278	void __user *arg)
	279	{
39b027d9 OG	280	int retval;
	281	struct kfd_ioctl_destroy_queue_args args;
	282
	283	if (copy_from_user(&args, arg, sizeof(args)))
	284	return -EFAULT;
	285
	286	pr_debug("kfd: destroying queue id %d for PASID %d\n",
	287	args.queue_id,
	288	p->pasid);
	289
	290	mutex_lock(&p->mutex);
	291
	292	retval = pqm_destroy_queue(&p->pqm, args.queue_id);
	293
	294	mutex_unlock(&p->mutex);
	295	return retval;
4a488a7a OG	296	}
	297
	298	static int kfd_ioctl_update_queue(struct file filp, struct kfd_process p,
	299	void __user *arg)
	300	{
39b027d9 OG	301	int retval;
	302	struct kfd_ioctl_update_queue_args args;
	303	struct queue_properties properties;
	304
	305	if (copy_from_user(&args, arg, sizeof(args)))
	306	return -EFAULT;
	307
	308	if (args.queue_percentage > KFD_MAX_QUEUE_PERCENTAGE) {
	309	pr_err("kfd: queue percentage must be between 0 to KFD_MAX_QUEUE_PERCENTAGE\n");
	310	return -EINVAL;
	311	}
	312
	313	if (args.queue_priority > KFD_MAX_QUEUE_PRIORITY) {
	314	pr_err("kfd: queue priority must be between 0 to KFD_MAX_QUEUE_PRIORITY\n");
	315	return -EINVAL;
	316	}
	317
	318	if ((args.ring_base_address) &&
	319	(!access_ok(VERIFY_WRITE, args.ring_base_address, sizeof(uint64_t)))) {
	320	pr_err("kfd: can't access ring base address\n");
	321	return -EFAULT;
	322	}
	323
	324	if (!is_power_of_2(args.ring_size) && (args.ring_size != 0)) {
	325	pr_err("kfd: ring size must be a power of 2 or 0\n");
	326	return -EINVAL;
	327	}
	328
	329	properties.queue_address = args.ring_base_address;
	330	properties.queue_size = args.ring_size;
	331	properties.queue_percent = args.queue_percentage;
	332	properties.priority = args.queue_priority;
	333
	334	pr_debug("kfd: updating queue id %d for PASID %d\n",
	335	args.queue_id, p->pasid);
	336
	337	mutex_lock(&p->mutex);
	338
	339	retval = pqm_update_queue(&p->pqm, args.queue_id, &properties);
	340
	341	mutex_unlock(&p->mutex);
	342
	343	return retval;
4a488a7a OG	344	}
	345
	346	static long kfd_ioctl_set_memory_policy(struct file *filep,
	347	struct kfd_process p, void __user arg)
	348	{
41a286fa AL	349	struct kfd_ioctl_set_memory_policy_args args;
	350	struct kfd_dev *dev;
	351	int err = 0;
	352	struct kfd_process_device *pdd;
	353	enum cache_policy default_policy, alternate_policy;
	354
	355	if (copy_from_user(&args, arg, sizeof(args)))
	356	return -EFAULT;
	357
	358	if (args.default_policy != KFD_IOC_CACHE_POLICY_COHERENT
	359	&& args.default_policy != KFD_IOC_CACHE_POLICY_NONCOHERENT) {
	360	return -EINVAL;
	361	}
	362
	363	if (args.alternate_policy != KFD_IOC_CACHE_POLICY_COHERENT
	364	&& args.alternate_policy != KFD_IOC_CACHE_POLICY_NONCOHERENT) {
	365	return -EINVAL;
	366	}
	367
	368	dev = kfd_device_by_id(args.gpu_id);
	369	if (dev == NULL)
	370	return -EINVAL;
	371
	372	mutex_lock(&p->mutex);
	373
	374	pdd = kfd_bind_process_to_device(dev, p);
	375	if (IS_ERR(pdd) < 0) {
	376	err = PTR_ERR(pdd);
	377	goto out;
	378	}
	379
	380	default_policy = (args.default_policy == KFD_IOC_CACHE_POLICY_COHERENT)
	381	? cache_policy_coherent : cache_policy_noncoherent;
	382
	383	alternate_policy =
	384	(args.alternate_policy == KFD_IOC_CACHE_POLICY_COHERENT)
	385	? cache_policy_coherent : cache_policy_noncoherent;
	386
	387	if (!dev->dqm->set_cache_memory_policy(dev->dqm,
	388	&pdd->qpd,
	389	default_policy,
	390	alternate_policy,
	391	(void __user *)args.alternate_aperture_base,
	392	args.alternate_aperture_size))
	393	err = -EINVAL;
	394
	395	out:
	396	mutex_unlock(&p->mutex);
	397
	398	return err;
4a488a7a OG	399	}
	400
	401	static long kfd_ioctl_get_clock_counters(struct file *filep,
	402	struct kfd_process p, void __user arg)
	403	{
4fac47c8 EP	404	struct kfd_ioctl_get_clock_counters_args args;
	405	struct kfd_dev *dev;
	406	struct timespec time;
	407
	408	if (copy_from_user(&args, arg, sizeof(args)))
	409	return -EFAULT;
	410
	411	dev = kfd_device_by_id(args.gpu_id);
	412	if (dev == NULL)
	413	return -EINVAL;
	414
	415	/* Reading GPU clock counter from KGD */
	416	args.gpu_clock_counter = kfd2kgd->get_gpu_clock_counter(dev->kgd);
	417
	418	/* No access to rdtsc. Using raw monotonic time */
	419	getrawmonotonic(&time);
	420	args.cpu_clock_counter = (uint64_t)timespec_to_ns(&time);
	421
	422	get_monotonic_boottime(&time);
	423	args.system_clock_counter = (uint64_t)timespec_to_ns(&time);
	424
	425	/* Since the counter is in nano-seconds we use 1GHz frequency */
	426	args.system_clock_freq = 1000000000;
	427
	428	if (copy_to_user(arg, &args, sizeof(args)))
	429	return -EFAULT;
	430
	431	return 0;
4a488a7a OG	432	}
	433
	434
	435	static int kfd_ioctl_get_process_apertures(struct file *filp,
	436	struct kfd_process p, void __user arg)
	437	{
	438	return -ENODEV;
	439	}
	440
	441	static long kfd_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
	442	{
	443	struct kfd_process *process;
	444	long err = -EINVAL;
	445
	446	dev_dbg(kfd_device,
	447	"ioctl cmd 0x%x (#%d), arg 0x%lx\n",
	448	cmd, _IOC_NR(cmd), arg);
	449
19f6d2a6 OG	450	process = kfd_get_process(current);
	451	if (IS_ERR(process))
	452	return PTR_ERR(process);
4a488a7a OG	453
	454	switch (cmd) {
	455	case KFD_IOC_GET_VERSION:
	456	err = kfd_ioctl_get_version(filep, process, (void __user *)arg);
	457	break;
	458	case KFD_IOC_CREATE_QUEUE:
	459	err = kfd_ioctl_create_queue(filep, process,
	460	(void __user *)arg);
	461	break;
	462
	463	case KFD_IOC_DESTROY_QUEUE:
	464	err = kfd_ioctl_destroy_queue(filep, process,
	465	(void __user *)arg);
	466	break;
	467
	468	case KFD_IOC_SET_MEMORY_POLICY:
	469	err = kfd_ioctl_set_memory_policy(filep, process,
	470	(void __user *)arg);
	471	break;
	472
	473	case KFD_IOC_GET_CLOCK_COUNTERS:
	474	err = kfd_ioctl_get_clock_counters(filep, process,
	475	(void __user *)arg);
	476	break;
	477
	478	case KFD_IOC_GET_PROCESS_APERTURES:
	479	err = kfd_ioctl_get_process_apertures(filep, process,
	480	(void __user *)arg);
	481	break;
	482
	483	case KFD_IOC_UPDATE_QUEUE:
	484	err = kfd_ioctl_update_queue(filep, process,
	485	(void __user *)arg);
	486	break;
	487
	488	default:
	489	dev_err(kfd_device,
	490	"unknown ioctl cmd 0x%x, arg 0x%lx)\n",
	491	cmd, arg);
	492	err = -EINVAL;
	493	break;
	494	}
	495
	496	if (err < 0)
	497	dev_err(kfd_device,
	498	"ioctl error %ld for ioctl cmd 0x%x (#%d)\n",
	499	err, cmd, _IOC_NR(cmd));
	500
	501	return err;
	502	}
19f6d2a6 OG	503
	504	static int kfd_mmap(struct file filp, struct vm_area_struct vma)
	505	{
	506	struct kfd_process *process;
	507
	508	process = kfd_get_process(current);
	509	if (IS_ERR(process))
	510	return PTR_ERR(process);
	511
	512	return kfd_doorbell_mmap(process, vma);
	513	}