| /* |
| * Copyright 2020,2022-2023 Arm Limited and/or its affiliates |
| * |
| * 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 "ethosu_network_info.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); |
| struct device *dev = net->dev; |
| |
| dev_info(dev, "Network destroy. net=0x%pK\n", net); |
| |
| if (net->buf != NULL) |
| ethosu_buffer_put(net->buf); |
| |
| memset(net, 0, sizeof(*net)); |
| devm_kfree(dev, net); |
| } |
| |
| static int ethosu_network_release(struct inode *inode, |
| struct file *file) |
| { |
| struct ethosu_network *net = file->private_data; |
| struct device *dev = net->dev; |
| |
| dev_info(dev, "Network release. file=0x%pK, net=0x%pK\n", |
| file, 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; |
| struct device *dev = net->dev; |
| void __user *udata = (void __user *)arg; |
| int ret; |
| |
| ret = device_lock_interruptible(net->dev); |
| if (ret) |
| return ret; |
| |
| dev_info(dev, |
| "Network ioctl: file=0x%pK, net=0x%pK, cmd=0x%x, arg=0x%lx\n", |
| file, net, cmd, arg); |
| |
| switch (cmd) { |
| case ETHOSU_IOCTL_NETWORK_INFO: { |
| struct ethosu_uapi_network_info uapi = { 0 }; |
| |
| dev_info(dev, "Network ioctl: Network info. net=0x%pK\n", net); |
| |
| ret = ethosu_network_info_request(dev, net->mailbox, net, |
| &uapi); |
| if (ret) |
| break; |
| |
| ret = copy_to_user(udata, &uapi, sizeof(uapi)) ? -EFAULT : 0; |
| break; |
| } |
| case ETHOSU_IOCTL_INFERENCE_CREATE: { |
| struct ethosu_uapi_inference_create uapi; |
| |
| if (copy_from_user(&uapi, udata, sizeof(uapi))) { |
| ret = -EFAULT; |
| break; |
| } |
| |
| dev_info(dev, |
| "Network ioctl: Inference. ifm_fd=%u, ofm_fd=%u\n", |
| uapi.ifm_fd[0], uapi.ofm_fd[0]); |
| |
| ret = ethosu_inference_create(dev, net->mailbox, net, &uapi); |
| break; |
| } |
| default: { |
| dev_err(dev, "Invalid ioctl. cmd=%u, arg=%lu", |
| cmd, arg); |
| ret = -ENOIOCTLCMD; |
| break; |
| } |
| } |
| |
| device_unlock(net->dev); |
| |
| return ret; |
| } |
| |
| int ethosu_network_create(struct device *dev, |
| struct ethosu_mailbox *mailbox, |
| struct ethosu_uapi_network_create *uapi) |
| { |
| struct ethosu_network *net; |
| int ret = -ENOMEM; |
| |
| net = devm_kzalloc(dev, sizeof(*net), GFP_KERNEL); |
| if (!net) |
| return -ENOMEM; |
| |
| net->dev = dev; |
| net->mailbox = mailbox; |
| net->buf = NULL; |
| kref_init(&net->kref); |
| |
| if (uapi->type == ETHOSU_UAPI_NETWORK_BUFFER) { |
| net->buf = ethosu_buffer_get_from_fd(uapi->fd); |
| if (IS_ERR(net->buf)) { |
| ret = PTR_ERR(net->buf); |
| goto free_net; |
| } |
| } else { |
| net->index = uapi->index; |
| } |
| |
| ret = anon_inode_getfd("ethosu-network", ðosu_network_fops, net, |
| O_RDWR | O_CLOEXEC); |
| if (ret < 0) |
| goto put_buf; |
| |
| net->file = fget(ret); |
| fput(net->file); |
| |
| dev_info(dev, |
| "Network create. file=0x%pK, fd=%d, net=0x%pK, buf=0x%pK, index=%u", |
| net->file, ret, net, net->buf, net->index); |
| |
| return ret; |
| |
| put_buf: |
| if (net->buf != NULL) |
| ethosu_buffer_put(net->buf); |
| |
| free_net: |
| memset(net, 0, sizeof(*net)); |
| devm_kfree(dev, net); |
| |
| 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); |
| } |
| |
| int ethosu_network_put(struct ethosu_network *net) |
| { |
| return kref_put(&net->kref, ethosu_network_destroy); |
| } |