| /* |
| * (C) COPYRIGHT 2020 ARM Limited. All rights reserved. |
| * |
| * This program is free software and is provided to you under the terms of the |
| * GNU General Public License version 2 as published by the Free Software |
| * Foundation, and any use by you of this program is subject to the terms |
| * of such GNU licence. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, you can access it online at |
| * http://www.gnu.org/licenses/gpl-2.0.html. |
| * |
| * SPDX-License-Identifier: GPL-2.0-only |
| */ |
| |
| /**************************************************************************** |
| * Includes |
| ****************************************************************************/ |
| |
| #include "ethosu_network.h" |
| |
| #include "ethosu_buffer.h" |
| #include "ethosu_device.h" |
| #include "ethosu_inference.h" |
| #include "uapi/ethosu.h" |
| |
| #include <linux/anon_inodes.h> |
| #include <linux/file.h> |
| #include <linux/fs.h> |
| #include <linux/uaccess.h> |
| |
| /**************************************************************************** |
| * Variables |
| ****************************************************************************/ |
| |
| static int ethosu_network_release(struct inode *inode, |
| struct file *file); |
| |
| static long ethosu_network_ioctl(struct file *file, |
| unsigned int cmd, |
| unsigned long arg); |
| |
| static const struct file_operations ethosu_network_fops = { |
| .release = ðosu_network_release, |
| .unlocked_ioctl = ðosu_network_ioctl, |
| #ifdef CONFIG_COMPAT |
| .compat_ioctl = ðosu_network_ioctl, |
| #endif |
| }; |
| |
| /**************************************************************************** |
| * Functions |
| ****************************************************************************/ |
| |
| static bool ethosu_network_verify(struct file *file) |
| { |
| return file->f_op == ðosu_network_fops; |
| } |
| |
| static void ethosu_network_destroy(struct kref *kref) |
| { |
| struct ethosu_network *net = |
| container_of(kref, struct ethosu_network, kref); |
| |
| dev_info(net->edev->dev, "Network destroy. handle=0x%pK\n", net); |
| |
| ethosu_buffer_put(net->buf); |
| devm_kfree(net->edev->dev, net); |
| } |
| |
| static int ethosu_network_release(struct inode *inode, |
| struct file *file) |
| { |
| struct ethosu_network *net = file->private_data; |
| |
| dev_info(net->edev->dev, "Network release. handle=0x%pK\n", net); |
| |
| ethosu_network_put(net); |
| |
| return 0; |
| } |
| |
| static long ethosu_network_ioctl(struct file *file, |
| unsigned int cmd, |
| unsigned long arg) |
| { |
| struct ethosu_network *net = file->private_data; |
| void __user *udata = (void __user *)arg; |
| int ret = -EINVAL; |
| |
| ret = mutex_lock_interruptible(&net->edev->mutex); |
| if (ret) |
| return ret; |
| |
| dev_info(net->edev->dev, "Ioctl: cmd=%u, arg=%lu\n", cmd, arg); |
| |
| switch (cmd) { |
| case ETHOSU_IOCTL_INFERENCE_CREATE: { |
| struct ethosu_uapi_inference_create uapi; |
| |
| if (copy_from_user(&uapi, udata, sizeof(uapi))) |
| break; |
| |
| dev_info(net->edev->dev, |
| "Ioctl: Inference. ifm_fd=%u, ofm_fd=%u\n", |
| uapi.ifm_fd[0], uapi.ofm_fd[0]); |
| |
| ret = ethosu_inference_create(net->edev, net, &uapi); |
| break; |
| } |
| default: { |
| dev_err(net->edev->dev, "Invalid ioctl. cmd=%u, arg=%lu", |
| cmd, arg); |
| break; |
| } |
| } |
| |
| mutex_unlock(&net->edev->mutex); |
| |
| return ret; |
| } |
| |
| int ethosu_network_create(struct ethosu_device *edev, |
| struct ethosu_uapi_network_create *uapi) |
| { |
| struct ethosu_buffer *buf; |
| struct ethosu_network *net; |
| int ret = -ENOMEM; |
| |
| buf = ethosu_buffer_get_from_fd(uapi->fd); |
| if (IS_ERR(buf)) |
| return PTR_ERR(buf); |
| |
| net = devm_kzalloc(edev->dev, sizeof(*net), GFP_KERNEL); |
| if (!net) { |
| ret = -ENOMEM; |
| goto put_buf; |
| } |
| |
| net->edev = edev; |
| net->buf = buf; |
| kref_init(&net->kref); |
| |
| ret = anon_inode_getfd("ethosu-network", ðosu_network_fops, net, |
| O_RDWR | O_CLOEXEC); |
| if (ret < 0) |
| goto free_net; |
| |
| net->file = fget(ret); |
| fput(net->file); |
| |
| dev_info(edev->dev, "Network create. handle=0x%pK", |
| net); |
| |
| return ret; |
| |
| free_net: |
| devm_kfree(edev->dev, net); |
| |
| put_buf: |
| ethosu_buffer_put(buf); |
| |
| return ret; |
| } |
| |
| struct ethosu_network *ethosu_network_get_from_fd(int fd) |
| { |
| struct ethosu_network *net; |
| struct file *file; |
| |
| file = fget(fd); |
| if (!file) |
| return ERR_PTR(-EINVAL); |
| |
| if (!ethosu_network_verify(file)) { |
| fput(file); |
| |
| return ERR_PTR(-EINVAL); |
| } |
| |
| net = file->private_data; |
| ethosu_network_get(net); |
| fput(file); |
| |
| return net; |
| } |
| |
| void ethosu_network_get(struct ethosu_network *net) |
| { |
| kref_get(&net->kref); |
| } |
| |
| void ethosu_network_put(struct ethosu_network *net) |
| { |
| kref_put(&net->kref, ethosu_network_destroy); |
| } |