#include <crypto/algapi.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/bitops.h>
#include <linux/pci.h>
#include <linux/cdev.h>
#include <linux/uaccess.h>
#include "adf_accel_devices.h"
#include "adf_common_drv.h"
#include "adf_cfg.h"
#include "adf_cfg_common.h"
#include "adf_cfg_user.h"
#define ADF_CFG_MAX_SECTION 512
#define ADF_CFG_MAX_KEY_VAL 256
#define DEVICE_NAME "qat_adf_ctl"
static DEFINE_MUTEX(adf_ctl_lock);
static long adf_ctl_ioctl(struct file *fp, unsigned int cmd, unsigned long arg);
static const struct file_operations adf_ctl_ops = {
.owner = THIS_MODULE,
.unlocked_ioctl = adf_ctl_ioctl,
.compat_ioctl = compat_ptr_ioctl,
};
static const struct class adf_ctl_class = {
.name = DEVICE_NAME,
};
struct adf_ctl_drv_info {
unsigned int major;
struct cdev drv_cdev;
};
static struct adf_ctl_drv_info adf_ctl_drv;
static void adf_chr_drv_destroy(void)
{
device_destroy(&adf_ctl_class, MKDEV(adf_ctl_drv.major, 0));
cdev_del(&adf_ctl_drv.drv_cdev);
class_unregister(&adf_ctl_class);
unregister_chrdev_region(MKDEV(adf_ctl_drv.major, 0), 1);
}
static int adf_chr_drv_create(void)
{
dev_t dev_id;
struct device *drv_device;
int ret;
if (alloc_chrdev_region(&dev_id, 0, 1, DEVICE_NAME)) {
pr_err("QAT: unable to allocate chrdev region\n");
return -EFAULT;
}
ret = class_register(&adf_ctl_class);
if (ret)
goto err_chrdev_unreg;
adf_ctl_drv.major = MAJOR(dev_id);
cdev_init(&adf_ctl_drv.drv_cdev, &adf_ctl_ops);
if (cdev_add(&adf_ctl_drv.drv_cdev, dev_id, 1)) {
pr_err("QAT: cdev add failed\n");
goto err_class_destr;
}
drv_device = device_create(&adf_ctl_class, NULL,
MKDEV(adf_ctl_drv.major, 0),
NULL, DEVICE_NAME);
if (IS_ERR(drv_device)) {
pr_err("QAT: failed to create device\n");
goto err_cdev_del;
}
return 0;
err_cdev_del:
cdev_del(&adf_ctl_drv.drv_cdev);
err_class_destr:
class_unregister(&adf_ctl_class);
err_chrdev_unreg:
unregister_chrdev_region(dev_id, 1);
return -EFAULT;
}
static struct adf_user_cfg_ctl_data *adf_ctl_alloc_resources(unsigned long arg)
{
struct adf_user_cfg_ctl_data *cfg_data;
cfg_data = memdup_user((void __user *)arg, sizeof(*cfg_data));
if (IS_ERR(cfg_data))
pr_err("QAT: failed to copy from user cfg_data.\n");
return cfg_data;
}
static int adf_add_key_value_data(struct adf_accel_dev *accel_dev,
const char *section,
const struct adf_user_cfg_key_val *key_val)
{
if (key_val->type == ADF_HEX) {
long *ptr = (long *)key_val->val;
long val = *ptr;
if (adf_cfg_add_key_value_param(accel_dev, section,
key_val->key, (void *)val,
key_val->type)) {
dev_err(&GET_DEV(accel_dev),
"failed to add hex keyvalue.\n");
return -EFAULT;
}
} else {
if (adf_cfg_add_key_value_param(accel_dev, section,
key_val->key, key_val->val,
key_val->type)) {
dev_err(&GET_DEV(accel_dev),
"failed to add keyvalue.\n");
return -EFAULT;
}
}
return 0;
}
static int adf_copy_key_value_data(struct adf_accel_dev *accel_dev,
struct adf_user_cfg_ctl_data *ctl_data)
{
struct adf_user_cfg_key_val key_val;
struct adf_user_cfg_key_val *params_head;
struct adf_user_cfg_section section, *section_head;
int i, j;
section_head = ctl_data->config_section;
for (i = 0; section_head && i < ADF_CFG_MAX_SECTION; i++) {
if (copy_from_user(§ion, (void __user *)section_head,
sizeof(*section_head))) {
dev_err(&GET_DEV(accel_dev),
"failed to copy section info\n");
goto out_err;
}
if (adf_cfg_section_add(accel_dev, section.name)) {
dev_err(&GET_DEV(accel_dev),
"failed to add section.\n");
goto out_err;
}
params_head = section.params;
for (j = 0; params_head && j < ADF_CFG_MAX_KEY_VAL; j++) {
if (copy_from_user(&key_val, (void __user *)params_head,
sizeof(key_val))) {
dev_err(&GET_DEV(accel_dev),
"Failed to copy keyvalue.\n");
goto out_err;
}
if (adf_add_key_value_data(accel_dev, section.name,
&key_val)) {
goto out_err;
}
params_head = key_val.next;
}
section_head = section.next;
}
return 0;
out_err:
adf_cfg_del_all(accel_dev);
return -EFAULT;
}
static int adf_ctl_ioctl_dev_config(struct file *fp, unsigned int cmd,
unsigned long arg)
{
struct adf_user_cfg_ctl_data *ctl_data;
struct adf_accel_dev *accel_dev;
int ret = 0;
ctl_data = adf_ctl_alloc_resources(arg);
if (IS_ERR(ctl_data))
return PTR_ERR(ctl_data);
accel_dev = adf_devmgr_get_dev_by_id(ctl_data->device_id);
if (!accel_dev) {
ret = -EFAULT;
goto out;
}
if (adf_dev_started(accel_dev)) {
ret = -EFAULT;
goto out;
}
if (adf_copy_key_value_data(accel_dev, ctl_data)) {
ret = -EFAULT;
goto out;
}
set_bit(ADF_STATUS_CONFIGURED, &accel_dev->status);
out:
kfree(ctl_data);
return ret;
}
static int adf_ctl_is_device_in_use(int id)
{
struct adf_accel_dev *dev;
list_for_each_entry(dev, adf_devmgr_get_head(), list) {
if (id == dev->accel_id || id == ADF_CFG_ALL_DEVICES) {
if (adf_devmgr_in_reset(dev) || adf_dev_in_use(dev)) {
dev_info(&GET_DEV(dev),
"device qat_dev%d is busy\n",
dev->accel_id);
return -EBUSY;
}
}
}
return 0;
}
static void adf_ctl_stop_devices(u32 id)
{
struct adf_accel_dev *accel_dev;
list_for_each_entry(accel_dev, adf_devmgr_get_head(), list) {
if (id == accel_dev->accel_id || id == ADF_CFG_ALL_DEVICES) {
if (!adf_dev_started(accel_dev))
continue;
if (!accel_dev->is_vf)
continue;
adf_dev_down(accel_dev);
}
}
list_for_each_entry(accel_dev, adf_devmgr_get_head(), list) {
if (id == accel_dev->accel_id || id == ADF_CFG_ALL_DEVICES) {
if (!adf_dev_started(accel_dev))
continue;
adf_dev_down(accel_dev);
}
}
}
static int adf_ctl_ioctl_dev_stop(struct file *fp, unsigned int cmd,
unsigned long arg)
{
int ret;
struct adf_user_cfg_ctl_data *ctl_data;
ctl_data = adf_ctl_alloc_resources(arg);
if (IS_ERR(ctl_data))
return PTR_ERR(ctl_data);
if (adf_devmgr_verify_id(ctl_data->device_id)) {
pr_err("QAT: Device %d not found\n", ctl_data->device_id);
ret = -ENODEV;
goto out;
}
ret = adf_ctl_is_device_in_use(ctl_data->device_id);
if (ret)
goto out;
if (ctl_data->device_id == ADF_CFG_ALL_DEVICES)
pr_info("QAT: Stopping all acceleration devices.\n");
else
pr_info("QAT: Stopping acceleration device qat_dev%d.\n",
ctl_data->device_id);
adf_ctl_stop_devices(ctl_data->device_id);
out:
kfree(ctl_data);
return ret;
}
static int adf_ctl_ioctl_dev_start(struct file *fp, unsigned int cmd,
unsigned long arg)
{
int ret;
struct adf_user_cfg_ctl_data *ctl_data;
struct adf_accel_dev *accel_dev;
ctl_data = adf_ctl_alloc_resources(arg);
if (IS_ERR(ctl_data))
return PTR_ERR(ctl_data);
ret = -ENODEV;
accel_dev = adf_devmgr_get_dev_by_id(ctl_data->device_id);
if (!accel_dev)
goto out;
dev_info(&GET_DEV(accel_dev),
"Starting acceleration device qat_dev%d.\n",
ctl_data->device_id);
ret = adf_dev_up(accel_dev, false);
if (ret) {
dev_err(&GET_DEV(accel_dev), "Failed to start qat_dev%d\n",
ctl_data->device_id);
adf_dev_down(accel_dev);
}
out:
kfree(ctl_data);
return ret;
}
static int adf_ctl_ioctl_get_num_devices(struct file *fp, unsigned int cmd,
unsigned long arg)
{
u32 num_devices = 0;
adf_devmgr_get_num_dev(&num_devices);
if (copy_to_user((void __user *)arg, &num_devices, sizeof(num_devices)))
return -EFAULT;
return 0;
}
static int adf_ctl_ioctl_get_status(struct file *fp, unsigned int cmd,
unsigned long arg)
{
struct adf_hw_device_data *hw_data;
struct adf_dev_status_info dev_info;
struct adf_accel_dev *accel_dev;
if (copy_from_user(&dev_info, (void __user *)arg,
sizeof(struct adf_dev_status_info))) {
pr_err("QAT: failed to copy from user.\n");
return -EFAULT;
}
accel_dev = adf_devmgr_get_dev_by_id(dev_info.accel_id);
if (!accel_dev)
return -ENODEV;
hw_data = accel_dev->hw_device;
dev_info.state = adf_dev_started(accel_dev) ? DEV_UP : DEV_DOWN;
dev_info.num_ae = hw_data->get_num_aes(hw_data);
dev_info.num_accel = hw_data->get_num_accels(hw_data);
dev_info.num_logical_accel = hw_data->num_logical_accel;
dev_info.banks_per_accel = hw_data->num_banks
/ hw_data->num_logical_accel;
strscpy(dev_info.name, hw_data->dev_class->name, sizeof(dev_info.name));
dev_info.instance_id = hw_data->instance_id;
dev_info.type = hw_data->dev_class->type;
dev_info.bus = accel_to_pci_dev(accel_dev)->bus->number;
dev_info.dev = PCI_SLOT(accel_to_pci_dev(accel_dev)->devfn);
dev_info.fun = PCI_FUNC(accel_to_pci_dev(accel_dev)->devfn);
if (copy_to_user((void __user *)arg, &dev_info,
sizeof(struct adf_dev_status_info))) {
dev_err(&GET_DEV(accel_dev), "failed to copy status.\n");
return -EFAULT;
}
return 0;
}
static long adf_ctl_ioctl(struct file *fp, unsigned int cmd, unsigned long arg)
{
int ret;
if (mutex_lock_interruptible(&adf_ctl_lock))
return -EFAULT;
switch (cmd) {
case IOCTL_CONFIG_SYS_RESOURCE_PARAMETERS:
ret = adf_ctl_ioctl_dev_config(fp, cmd, arg);
break;
case IOCTL_STOP_ACCEL_DEV:
ret = adf_ctl_ioctl_dev_stop(fp, cmd, arg);
break;
case IOCTL_START_ACCEL_DEV:
ret = adf_ctl_ioctl_dev_start(fp, cmd, arg);
break;
case IOCTL_GET_NUM_DEVICES:
ret = adf_ctl_ioctl_get_num_devices(fp, cmd, arg);
break;
case IOCTL_STATUS_ACCEL_DEV:
ret = adf_ctl_ioctl_get_status(fp, cmd, arg);
break;
default:
pr_err_ratelimited("QAT: Invalid ioctl %d\n", cmd);
ret = -EFAULT;
break;
}
mutex_unlock(&adf_ctl_lock);
return ret;
}
static int __init adf_register_ctl_device_driver(void)
{
if (adf_chr_drv_create())
goto err_chr_dev;
if (adf_init_misc_wq())
goto err_misc_wq;
if (adf_init_aer())
goto err_aer;
if (adf_init_pf_wq())
goto err_pf_wq;
if (adf_init_vf_wq())
goto err_vf_wq;
if (qat_crypto_register())
goto err_crypto_register;
if (qat_compression_register())
goto err_compression_register;
return 0;
err_compression_register:
qat_crypto_unregister();
err_crypto_register:
adf_exit_vf_wq();
err_vf_wq:
adf_exit_pf_wq();
err_pf_wq:
adf_exit_aer();
err_aer:
adf_exit_misc_wq();
err_misc_wq:
adf_chr_drv_destroy();
err_chr_dev:
mutex_destroy(&adf_ctl_lock);
return -EFAULT;
}
static void __exit adf_unregister_ctl_device_driver(void)
{
adf_chr_drv_destroy();
adf_exit_misc_wq();
adf_exit_aer();
adf_exit_vf_wq();
adf_exit_pf_wq();
qat_crypto_unregister();
qat_compression_unregister();
adf_clean_vf_map(false);
mutex_destroy(&adf_ctl_lock);
}
module_init(adf_register_ctl_device_driver);
module_exit(adf_unregister_ctl_device_driver);
MODULE_LICENSE("Dual BSD/GPL");
MODULE_AUTHOR("Intel");
MODULE_DESCRIPTION("Intel(R) QuickAssist Technology");
MODULE_ALIAS_CRYPTO("intel_qat");
MODULE_VERSION(ADF_DRV_VERSION);
MODULE_IMPORT_NS("CRYPTO_INTERNAL");
