Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 1 | /* |
Kristofer Jonsson | 35de9e6 | 2022-03-08 13:25:45 +0100 | [diff] [blame^] | 2 | * Copyright (c) 2020, 2022 Arm Limited. |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 3 | * |
| 4 | * This program is free software and is provided to you under the terms of the |
| 5 | * GNU General Public License version 2 as published by the Free Software |
| 6 | * Foundation, and any use by you of this program is subject to the terms |
| 7 | * of such GNU licence. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, you can access it online at |
| 16 | * http://www.gnu.org/licenses/gpl-2.0.html. |
| 17 | * |
| 18 | * SPDX-License-Identifier: GPL-2.0-only |
| 19 | */ |
| 20 | |
| 21 | /**************************************************************************** |
| 22 | * Includes |
| 23 | ****************************************************************************/ |
| 24 | |
| 25 | #include "ethosu_network.h" |
| 26 | |
| 27 | #include "ethosu_buffer.h" |
| 28 | #include "ethosu_device.h" |
| 29 | #include "ethosu_inference.h" |
| 30 | #include "uapi/ethosu.h" |
| 31 | |
| 32 | #include <linux/anon_inodes.h> |
| 33 | #include <linux/file.h> |
| 34 | #include <linux/fs.h> |
| 35 | #include <linux/uaccess.h> |
| 36 | |
| 37 | /**************************************************************************** |
| 38 | * Variables |
| 39 | ****************************************************************************/ |
| 40 | |
| 41 | static int ethosu_network_release(struct inode *inode, |
| 42 | struct file *file); |
| 43 | |
| 44 | static long ethosu_network_ioctl(struct file *file, |
| 45 | unsigned int cmd, |
| 46 | unsigned long arg); |
| 47 | |
| 48 | static const struct file_operations ethosu_network_fops = { |
| 49 | .release = ðosu_network_release, |
| 50 | .unlocked_ioctl = ðosu_network_ioctl, |
| 51 | #ifdef CONFIG_COMPAT |
| 52 | .compat_ioctl = ðosu_network_ioctl, |
| 53 | #endif |
| 54 | }; |
| 55 | |
| 56 | /**************************************************************************** |
| 57 | * Functions |
| 58 | ****************************************************************************/ |
| 59 | |
| 60 | static bool ethosu_network_verify(struct file *file) |
| 61 | { |
| 62 | return file->f_op == ðosu_network_fops; |
| 63 | } |
| 64 | |
| 65 | static void ethosu_network_destroy(struct kref *kref) |
| 66 | { |
| 67 | struct ethosu_network *net = |
| 68 | container_of(kref, struct ethosu_network, kref); |
| 69 | |
| 70 | dev_info(net->edev->dev, "Network destroy. handle=0x%pK\n", net); |
| 71 | |
Kristofer Jonsson | 35de9e6 | 2022-03-08 13:25:45 +0100 | [diff] [blame^] | 72 | if (net->buf != NULL) |
| 73 | ethosu_buffer_put(net->buf); |
| 74 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 75 | devm_kfree(net->edev->dev, net); |
| 76 | } |
| 77 | |
| 78 | static int ethosu_network_release(struct inode *inode, |
| 79 | struct file *file) |
| 80 | { |
| 81 | struct ethosu_network *net = file->private_data; |
| 82 | |
| 83 | dev_info(net->edev->dev, "Network release. handle=0x%pK\n", net); |
| 84 | |
| 85 | ethosu_network_put(net); |
| 86 | |
| 87 | return 0; |
| 88 | } |
| 89 | |
| 90 | static long ethosu_network_ioctl(struct file *file, |
| 91 | unsigned int cmd, |
| 92 | unsigned long arg) |
| 93 | { |
| 94 | struct ethosu_network *net = file->private_data; |
| 95 | void __user *udata = (void __user *)arg; |
| 96 | int ret = -EINVAL; |
| 97 | |
| 98 | ret = mutex_lock_interruptible(&net->edev->mutex); |
| 99 | if (ret) |
| 100 | return ret; |
| 101 | |
| 102 | dev_info(net->edev->dev, "Ioctl: cmd=%u, arg=%lu\n", cmd, arg); |
| 103 | |
| 104 | switch (cmd) { |
| 105 | case ETHOSU_IOCTL_INFERENCE_CREATE: { |
| 106 | struct ethosu_uapi_inference_create uapi; |
| 107 | |
| 108 | if (copy_from_user(&uapi, udata, sizeof(uapi))) |
| 109 | break; |
| 110 | |
| 111 | dev_info(net->edev->dev, |
| 112 | "Ioctl: Inference. ifm_fd=%u, ofm_fd=%u\n", |
Kristofer Jonsson | b74492c | 2020-09-10 13:26:01 +0200 | [diff] [blame] | 113 | uapi.ifm_fd[0], uapi.ofm_fd[0]); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 114 | |
| 115 | ret = ethosu_inference_create(net->edev, net, &uapi); |
| 116 | break; |
| 117 | } |
| 118 | default: { |
| 119 | dev_err(net->edev->dev, "Invalid ioctl. cmd=%u, arg=%lu", |
| 120 | cmd, arg); |
| 121 | break; |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | mutex_unlock(&net->edev->mutex); |
| 126 | |
| 127 | return ret; |
| 128 | } |
| 129 | |
| 130 | int ethosu_network_create(struct ethosu_device *edev, |
| 131 | struct ethosu_uapi_network_create *uapi) |
| 132 | { |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 133 | struct ethosu_network *net; |
| 134 | int ret = -ENOMEM; |
| 135 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 136 | net = devm_kzalloc(edev->dev, sizeof(*net), GFP_KERNEL); |
Kristofer Jonsson | 35de9e6 | 2022-03-08 13:25:45 +0100 | [diff] [blame^] | 137 | if (!net) |
| 138 | return -ENOMEM; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 139 | |
| 140 | net->edev = edev; |
Kristofer Jonsson | 35de9e6 | 2022-03-08 13:25:45 +0100 | [diff] [blame^] | 141 | net->buf = NULL; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 142 | kref_init(&net->kref); |
| 143 | |
Kristofer Jonsson | 35de9e6 | 2022-03-08 13:25:45 +0100 | [diff] [blame^] | 144 | if (uapi->type == ETHOSU_UAPI_NETWORK_BUFFER) { |
| 145 | net->buf = ethosu_buffer_get_from_fd(uapi->fd); |
| 146 | if (IS_ERR(net->buf)) { |
| 147 | ret = PTR_ERR(net->buf); |
| 148 | goto free_net; |
| 149 | } |
| 150 | } else { |
| 151 | net->index = uapi->index; |
| 152 | } |
| 153 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 154 | ret = anon_inode_getfd("ethosu-network", ðosu_network_fops, net, |
| 155 | O_RDWR | O_CLOEXEC); |
| 156 | if (ret < 0) |
Kristofer Jonsson | 35de9e6 | 2022-03-08 13:25:45 +0100 | [diff] [blame^] | 157 | goto put_buf; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 158 | |
| 159 | net->file = fget(ret); |
| 160 | fput(net->file); |
| 161 | |
| 162 | dev_info(edev->dev, "Network create. handle=0x%pK", |
| 163 | net); |
| 164 | |
| 165 | return ret; |
| 166 | |
Kristofer Jonsson | 35de9e6 | 2022-03-08 13:25:45 +0100 | [diff] [blame^] | 167 | put_buf: |
| 168 | if (net->buf != NULL) |
| 169 | ethosu_buffer_put(net->buf); |
| 170 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 171 | free_net: |
| 172 | devm_kfree(edev->dev, net); |
| 173 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 174 | return ret; |
| 175 | } |
| 176 | |
| 177 | struct ethosu_network *ethosu_network_get_from_fd(int fd) |
| 178 | { |
| 179 | struct ethosu_network *net; |
| 180 | struct file *file; |
| 181 | |
| 182 | file = fget(fd); |
| 183 | if (!file) |
| 184 | return ERR_PTR(-EINVAL); |
| 185 | |
| 186 | if (!ethosu_network_verify(file)) { |
| 187 | fput(file); |
| 188 | |
| 189 | return ERR_PTR(-EINVAL); |
| 190 | } |
| 191 | |
| 192 | net = file->private_data; |
| 193 | ethosu_network_get(net); |
| 194 | fput(file); |
| 195 | |
| 196 | return net; |
| 197 | } |
| 198 | |
| 199 | void ethosu_network_get(struct ethosu_network *net) |
| 200 | { |
| 201 | kref_get(&net->kref); |
| 202 | } |
| 203 | |
| 204 | void ethosu_network_put(struct ethosu_network *net) |
| 205 | { |
| 206 | kref_put(&net->kref, ethosu_network_destroy); |
| 207 | } |