Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 1 | /* |
| 2 | * (C) COPYRIGHT 2020 ARM Limited. All rights reserved. |
| 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_device.h" |
| 26 | |
| 27 | #include "ethosu_buffer.h" |
| 28 | #include "ethosu_core_interface.h" |
| 29 | #include "ethosu_inference.h" |
| 30 | #include "ethosu_network.h" |
| 31 | #include "uapi/ethosu.h" |
| 32 | |
| 33 | #include <linux/delay.h> |
| 34 | #include <linux/dma-mapping.h> |
| 35 | #include <linux/errno.h> |
| 36 | #include <linux/fs.h> |
| 37 | #include <linux/interrupt.h> |
| 38 | #include <linux/io.h> |
| 39 | #include <linux/of_reserved_mem.h> |
| 40 | #include <linux/uaccess.h> |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 41 | #include <linux/slab.h> |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 42 | |
| 43 | /**************************************************************************** |
| 44 | * Defines |
| 45 | ****************************************************************************/ |
| 46 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 47 | #define DMA_ADDR_BITS 32 /* Number of address bits */ |
| 48 | |
Henrik Hoglind | 90f5080 | 2021-08-17 15:04:57 +0200 | [diff] [blame] | 49 | #define CAPABILITIES_RESP_TIMEOUT_MS 100 |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 50 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 51 | /**************************************************************************** |
| 52 | * Types |
| 53 | ****************************************************************************/ |
| 54 | |
| 55 | /**************************************************************************** |
| 56 | * Functions |
| 57 | ****************************************************************************/ |
| 58 | |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 59 | static void ethosu_capabilities_destroy(struct kref *kref) |
| 60 | { |
| 61 | struct ethosu_capabilities *cap = |
| 62 | container_of(kref, struct ethosu_capabilities, refcount); |
| 63 | |
| 64 | list_del(&cap->list); |
| 65 | |
| 66 | devm_kfree(cap->edev->dev, cap); |
| 67 | } |
| 68 | |
| 69 | static int ethosu_capabilities_find(struct ethosu_capabilities *cap, |
| 70 | struct list_head *capabilties_list) |
| 71 | { |
| 72 | struct ethosu_capabilities *cur; |
| 73 | |
| 74 | list_for_each_entry(cur, capabilties_list, list) { |
| 75 | if (cur == cap) |
| 76 | return 0; |
| 77 | } |
| 78 | |
| 79 | return -EINVAL; |
| 80 | } |
| 81 | |
| 82 | static int ethosu_capability_rsp(struct ethosu_device *edev, |
| 83 | struct ethosu_core_msg_capabilities_rsp *msg) |
| 84 | { |
| 85 | struct ethosu_capabilities *cap; |
| 86 | struct ethosu_uapi_device_capabilities *capabilities; |
| 87 | int ret; |
| 88 | |
| 89 | cap = (struct ethosu_capabilities *)msg->user_arg; |
| 90 | ret = ethosu_capabilities_find(cap, &edev->capabilities_list); |
| 91 | if (0 != ret) { |
| 92 | dev_warn(edev->dev, |
| 93 | "Handle not found in capabilities list. handle=0x%p\n", |
| 94 | cap); |
| 95 | |
| 96 | /* NOTE: do not call complete or kref_put on invalid data! */ |
| 97 | return ret; |
| 98 | } |
| 99 | |
| 100 | capabilities = cap->capabilities; |
| 101 | |
| 102 | capabilities->hw_id.version_status = msg->version_status; |
| 103 | capabilities->hw_id.version_minor = msg->version_minor; |
| 104 | capabilities->hw_id.version_major = msg->version_major; |
| 105 | capabilities->hw_id.product_major = msg->product_major; |
| 106 | capabilities->hw_id.arch_patch_rev = msg->arch_patch_rev; |
| 107 | capabilities->hw_id.arch_minor_rev = msg->arch_minor_rev; |
| 108 | capabilities->hw_id.arch_major_rev = msg->arch_major_rev; |
| 109 | capabilities->driver_patch_rev = msg->driver_patch_rev; |
| 110 | capabilities->driver_minor_rev = msg->driver_minor_rev; |
| 111 | capabilities->driver_major_rev = msg->driver_major_rev; |
| 112 | capabilities->hw_cfg.macs_per_cc = msg->macs_per_cc; |
| 113 | capabilities->hw_cfg.cmd_stream_version = msg->cmd_stream_version; |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 114 | capabilities->hw_cfg.custom_dma = msg->custom_dma; |
| 115 | |
| 116 | complete(&cap->done); |
| 117 | |
| 118 | kref_put(&cap->refcount, ethosu_capabilities_destroy); |
| 119 | |
| 120 | return 0; |
| 121 | } |
| 122 | |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 123 | /* Incoming messages */ |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 124 | static int ethosu_handle_msg(struct ethosu_device *edev) |
| 125 | { |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 126 | int ret; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 127 | struct ethosu_core_msg header; |
| 128 | |
| 129 | union { |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 130 | struct ethosu_core_msg_err error; |
| 131 | struct ethosu_core_inference_rsp inf; |
| 132 | struct ethosu_core_msg_version version; |
| 133 | struct ethosu_core_msg_capabilities_rsp capabilities; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 134 | } data; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 135 | |
| 136 | /* Read message */ |
| 137 | ret = ethosu_mailbox_read(&edev->mailbox, &header, &data, sizeof(data)); |
| 138 | if (ret) |
| 139 | return ret; |
| 140 | |
| 141 | switch (header.type) { |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 142 | case ETHOSU_CORE_MSG_ERR: |
| 143 | if (header.length != sizeof(data.error)) { |
| 144 | dev_warn(edev->dev, |
| 145 | "Msg: Error message of incorrect size. size=%u, expected=%zu\n", header.length, |
| 146 | sizeof(data.error)); |
| 147 | ret = -EBADMSG; |
| 148 | break; |
| 149 | } |
| 150 | |
| 151 | data.error.msg[sizeof(data.error.msg) - 1] = '\0'; |
| 152 | dev_warn(edev->dev, "Msg: Error. type=%u, msg=\"%s\"\n", |
| 153 | data.error.type, data.error.msg); |
| 154 | ret = -EBADMSG; |
| 155 | break; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 156 | case ETHOSU_CORE_MSG_PING: |
| 157 | dev_info(edev->dev, "Msg: Ping\n"); |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 158 | ret = ethosu_mailbox_pong(&edev->mailbox); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 159 | break; |
| 160 | case ETHOSU_CORE_MSG_PONG: |
| 161 | dev_info(edev->dev, "Msg: Pong\n"); |
| 162 | break; |
| 163 | case ETHOSU_CORE_MSG_INFERENCE_RSP: |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 164 | if (header.length != sizeof(data.inf)) { |
| 165 | dev_warn(edev->dev, |
| 166 | "Msg: Inference response of incorrect size. size=%u, expected=%zu\n", header.length, |
| 167 | sizeof(data.inf)); |
| 168 | ret = -EBADMSG; |
| 169 | break; |
| 170 | } |
| 171 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 172 | dev_info(edev->dev, |
Kristofer Jonsson | b74492c | 2020-09-10 13:26:01 +0200 | [diff] [blame] | 173 | "Msg: Inference response. user_arg=0x%llx, ofm_count=%u, status=%u\n", |
| 174 | data.inf.user_arg, data.inf.ofm_count, |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 175 | data.inf.status); |
| 176 | ethosu_inference_rsp(edev, &data.inf); |
| 177 | break; |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 178 | case ETHOSU_CORE_MSG_VERSION_RSP: |
| 179 | if (header.length != sizeof(data.version)) { |
| 180 | dev_warn(edev->dev, |
| 181 | "Msg: Version response of incorrect size. size=%u, expected=%zu\n", header.length, |
| 182 | sizeof(data.version)); |
| 183 | ret = -EBADMSG; |
| 184 | break; |
| 185 | } |
| 186 | |
| 187 | dev_info(edev->dev, "Msg: Version response v%u.%u.%u\n", |
| 188 | data.version.major, data.version.minor, |
| 189 | data.version.patch); |
| 190 | |
| 191 | /* Check major and minor version match, else return error */ |
| 192 | if (data.version.major != ETHOSU_CORE_MSG_VERSION_MAJOR || |
| 193 | data.version.minor != ETHOSU_CORE_MSG_VERSION_MINOR) { |
| 194 | dev_warn(edev->dev, "Msg: Version mismatch detected! "); |
| 195 | dev_warn(edev->dev, "Local version: v%u.%u.%u\n", |
| 196 | ETHOSU_CORE_MSG_VERSION_MAJOR, |
| 197 | ETHOSU_CORE_MSG_VERSION_MINOR, |
| 198 | ETHOSU_CORE_MSG_VERSION_PATCH); |
| 199 | } |
| 200 | |
| 201 | break; |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 202 | case ETHOSU_CORE_MSG_CAPABILITIES_RSP: |
| 203 | if (header.length != sizeof(data.capabilities)) { |
| 204 | dev_warn(edev->dev, |
| 205 | "Msg: Capabilities response of incorrect size. size=%u, expected=%zu\n", header.length, |
| 206 | sizeof(data.capabilities)); |
| 207 | ret = -EBADMSG; |
| 208 | break; |
| 209 | } |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 210 | |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 211 | dev_info(edev->dev, |
Davide Grohmann | 40e23d1 | 2021-06-17 09:59:40 +0200 | [diff] [blame] | 212 | "Msg: Capabilities response ua%llx vs%hhu v%hhu.%hhu p%hhu av%hhu.%hhu.%hhu dv%hhu.%hhu.%hhu mcc%hhu csv%hhu cd%hhu\n", |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 213 | data.capabilities.user_arg, |
| 214 | data.capabilities.version_status, |
| 215 | data.capabilities.version_major, |
| 216 | data.capabilities.version_minor, |
| 217 | data.capabilities.product_major, |
| 218 | data.capabilities.arch_major_rev, |
| 219 | data.capabilities.arch_minor_rev, |
| 220 | data.capabilities.arch_patch_rev, |
| 221 | data.capabilities.driver_major_rev, |
| 222 | data.capabilities.driver_minor_rev, |
| 223 | data.capabilities.driver_patch_rev, |
| 224 | data.capabilities.macs_per_cc, |
| 225 | data.capabilities.cmd_stream_version, |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 226 | data.capabilities.custom_dma); |
| 227 | |
| 228 | ret = ethosu_capability_rsp(edev, &data.capabilities); |
| 229 | break; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 230 | default: |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 231 | /* This should not happen due to version checks */ |
| 232 | dev_warn(edev->dev, "Msg: Protocol error\n"); |
| 233 | ret = -EPROTO; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 234 | break; |
| 235 | } |
| 236 | |
| 237 | return ret; |
| 238 | } |
| 239 | |
| 240 | static int ethosu_open(struct inode *inode, |
| 241 | struct file *file) |
| 242 | { |
| 243 | struct ethosu_device *edev = |
| 244 | container_of(inode->i_cdev, struct ethosu_device, cdev); |
| 245 | |
| 246 | file->private_data = edev; |
| 247 | |
| 248 | dev_info(edev->dev, "Opening device node.\n"); |
| 249 | |
| 250 | return nonseekable_open(inode, file); |
| 251 | } |
| 252 | |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 253 | static int ethosu_send_capabilities_request(struct ethosu_device *edev, |
| 254 | void __user *udata) |
| 255 | { |
| 256 | struct ethosu_uapi_device_capabilities uapi; |
| 257 | struct ethosu_capabilities *cap; |
| 258 | int ret; |
| 259 | int timeout; |
| 260 | |
| 261 | cap = devm_kzalloc(edev->dev, sizeof(struct ethosu_capabilities), |
| 262 | GFP_KERNEL); |
| 263 | if (!cap) |
| 264 | return -ENOMEM; |
| 265 | |
| 266 | cap->edev = edev; |
| 267 | cap->capabilities = &uapi; |
| 268 | kref_init(&cap->refcount); |
| 269 | init_completion(&cap->done); |
| 270 | list_add(&cap->list, &edev->capabilities_list); |
| 271 | |
| 272 | ret = ethosu_mailbox_capabilities_request(&edev->mailbox, cap); |
| 273 | if (0 != ret) |
| 274 | goto put_kref; |
| 275 | |
| 276 | /* |
| 277 | * Increase ref counter since we sent the pointer out to |
| 278 | * response handler thread. That thread is responsible to |
| 279 | * decrease the ref counter before exiting. So the memory |
| 280 | * can be freed. |
| 281 | * |
| 282 | * NOTE: if no response is received back, the memory is leaked. |
| 283 | */ |
| 284 | kref_get(&cap->refcount); |
| 285 | /* Unlock the mutex before going to block on the condition */ |
| 286 | mutex_unlock(&edev->mutex); |
| 287 | /* wait for response to arrive back */ |
| 288 | timeout = wait_for_completion_timeout(&cap->done, |
| 289 | msecs_to_jiffies( |
| 290 | CAPABILITIES_RESP_TIMEOUT_MS)); |
| 291 | /* take back the mutex before resuming to do anything */ |
| 292 | ret = mutex_lock_interruptible(&edev->mutex); |
| 293 | if (0 != ret) |
| 294 | goto put_kref; |
| 295 | |
| 296 | if (0 == timeout /* timed out*/) { |
| 297 | dev_warn(edev->dev, |
| 298 | "Msg: Capabilities response lost - timeout\n"); |
| 299 | ret = -EIO; |
| 300 | goto put_kref; |
| 301 | } |
| 302 | |
| 303 | ret = copy_to_user(udata, &uapi, sizeof(uapi)) ? -EFAULT : 0; |
| 304 | |
| 305 | put_kref: |
| 306 | kref_put(&cap->refcount, ethosu_capabilities_destroy); |
| 307 | |
| 308 | return ret; |
| 309 | } |
| 310 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 311 | static long ethosu_ioctl(struct file *file, |
| 312 | unsigned int cmd, |
| 313 | unsigned long arg) |
| 314 | { |
| 315 | struct ethosu_device *edev = file->private_data; |
| 316 | void __user *udata = (void __user *)arg; |
| 317 | int ret = -EINVAL; |
| 318 | |
| 319 | ret = mutex_lock_interruptible(&edev->mutex); |
| 320 | if (ret) |
| 321 | return ret; |
| 322 | |
| 323 | dev_info(edev->dev, "Ioctl. cmd=%u, arg=%lu\n", cmd, arg); |
| 324 | |
| 325 | switch (cmd) { |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 326 | case ETHOSU_IOCTL_VERSION_REQ: |
| 327 | dev_info(edev->dev, "Ioctl: Send version request\n"); |
| 328 | ret = ethosu_mailbox_version_request(&edev->mailbox); |
| 329 | break; |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 330 | case ETHOSU_IOCTL_CAPABILITIES_REQ: |
| 331 | dev_info(edev->dev, "Ioctl: Send capabilities request\n"); |
| 332 | ret = ethosu_send_capabilities_request(edev, udata); |
| 333 | break; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 334 | case ETHOSU_IOCTL_PING: { |
| 335 | dev_info(edev->dev, "Ioctl: Send ping\n"); |
| 336 | ret = ethosu_mailbox_ping(&edev->mailbox); |
| 337 | break; |
| 338 | } |
| 339 | case ETHOSU_IOCTL_BUFFER_CREATE: { |
| 340 | struct ethosu_uapi_buffer_create uapi; |
| 341 | |
| 342 | dev_info(edev->dev, "Ioctl: Buffer create\n"); |
| 343 | |
| 344 | if (copy_from_user(&uapi, udata, sizeof(uapi))) |
| 345 | break; |
| 346 | |
| 347 | dev_info(edev->dev, "Ioctl: Buffer. capacity=%u\n", |
| 348 | uapi.capacity); |
| 349 | |
| 350 | ret = ethosu_buffer_create(edev, uapi.capacity); |
| 351 | break; |
| 352 | } |
| 353 | case ETHOSU_IOCTL_NETWORK_CREATE: { |
| 354 | struct ethosu_uapi_network_create uapi; |
| 355 | |
| 356 | if (copy_from_user(&uapi, udata, sizeof(uapi))) |
| 357 | break; |
| 358 | |
| 359 | dev_info(edev->dev, "Ioctl: Network. fd=%u\n", uapi.fd); |
| 360 | |
| 361 | ret = ethosu_network_create(edev, &uapi); |
| 362 | break; |
| 363 | } |
| 364 | default: { |
| 365 | dev_err(edev->dev, "Invalid ioctl. cmd=%u, arg=%lu", |
| 366 | cmd, arg); |
| 367 | break; |
| 368 | } |
| 369 | } |
| 370 | |
| 371 | mutex_unlock(&edev->mutex); |
| 372 | |
| 373 | return ret; |
| 374 | } |
| 375 | |
| 376 | static void ethosu_mbox_rx(void *user_arg) |
| 377 | { |
| 378 | struct ethosu_device *edev = user_arg; |
| 379 | int ret; |
| 380 | |
| 381 | mutex_lock(&edev->mutex); |
| 382 | |
| 383 | do { |
| 384 | ret = ethosu_handle_msg(edev); |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 385 | if (ret && ret != -ENOMSG) |
| 386 | /* Need to start over in case of error, empty the queue |
| 387 | * by fast-forwarding read position to write position. |
| 388 | * */ |
| 389 | ethosu_mailbox_reset(&edev->mailbox); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 390 | } while (ret == 0); |
| 391 | |
| 392 | mutex_unlock(&edev->mutex); |
| 393 | } |
| 394 | |
| 395 | int ethosu_dev_init(struct ethosu_device *edev, |
| 396 | struct device *dev, |
| 397 | struct class *class, |
Kristofer Jonsson | 4aec376 | 2021-10-13 17:09:27 +0200 | [diff] [blame^] | 398 | dev_t devt, |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 399 | struct resource *in_queue, |
| 400 | struct resource *out_queue) |
| 401 | { |
| 402 | static const struct file_operations fops = { |
| 403 | .owner = THIS_MODULE, |
| 404 | .open = ðosu_open, |
| 405 | .unlocked_ioctl = ðosu_ioctl, |
| 406 | #ifdef CONFIG_COMPAT |
| 407 | .compat_ioctl = ðosu_ioctl, |
| 408 | #endif |
| 409 | }; |
| 410 | struct device *sysdev; |
| 411 | int ret; |
| 412 | |
| 413 | edev->dev = dev; |
| 414 | edev->class = class; |
Kristofer Jonsson | 4aec376 | 2021-10-13 17:09:27 +0200 | [diff] [blame^] | 415 | edev->devt = devt; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 416 | mutex_init(&edev->mutex); |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 417 | INIT_LIST_HEAD(&edev->capabilities_list); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 418 | INIT_LIST_HEAD(&edev->inference_list); |
| 419 | |
| 420 | ret = of_reserved_mem_device_init(edev->dev); |
| 421 | if (ret) |
| 422 | return ret; |
| 423 | |
| 424 | dma_set_mask_and_coherent(edev->dev, DMA_BIT_MASK(DMA_ADDR_BITS)); |
| 425 | |
| 426 | ret = ethosu_mailbox_init(&edev->mailbox, dev, in_queue, out_queue, |
| 427 | ethosu_mbox_rx, edev); |
| 428 | if (ret) |
| 429 | goto release_reserved_mem; |
| 430 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 431 | cdev_init(&edev->cdev, &fops); |
| 432 | edev->cdev.owner = THIS_MODULE; |
| 433 | |
Kristofer Jonsson | 4aec376 | 2021-10-13 17:09:27 +0200 | [diff] [blame^] | 434 | ret = cdev_add(&edev->cdev, edev->devt, 1); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 435 | if (ret) { |
| 436 | dev_err(edev->dev, "Failed to add character device.\n"); |
Kristofer Jonsson | 4aec376 | 2021-10-13 17:09:27 +0200 | [diff] [blame^] | 437 | goto deinit_mailbox; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 438 | } |
| 439 | |
| 440 | sysdev = device_create(edev->class, NULL, edev->devt, edev, |
Kristofer Jonsson | 4aec376 | 2021-10-13 17:09:27 +0200 | [diff] [blame^] | 441 | "ethosu%d", MINOR(edev->devt)); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 442 | if (IS_ERR(sysdev)) { |
| 443 | dev_err(edev->dev, "Failed to create device.\n"); |
| 444 | ret = PTR_ERR(sysdev); |
| 445 | goto del_cdev; |
| 446 | } |
| 447 | |
| 448 | dev_info(edev->dev, |
| 449 | "Created Arm Ethos-U device. name=%s, major=%d, minor=%d\n", |
| 450 | dev_name(sysdev), MAJOR(edev->devt), MINOR(edev->devt)); |
| 451 | |
| 452 | return 0; |
| 453 | |
| 454 | del_cdev: |
| 455 | cdev_del(&edev->cdev); |
| 456 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 457 | deinit_mailbox: |
| 458 | ethosu_mailbox_deinit(&edev->mailbox); |
| 459 | |
| 460 | release_reserved_mem: |
| 461 | of_reserved_mem_device_release(edev->dev); |
| 462 | |
| 463 | return ret; |
| 464 | } |
| 465 | |
| 466 | void ethosu_dev_deinit(struct ethosu_device *edev) |
| 467 | { |
| 468 | ethosu_mailbox_deinit(&edev->mailbox); |
| 469 | device_destroy(edev->class, edev->cdev.dev); |
| 470 | cdev_del(&edev->cdev); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 471 | of_reserved_mem_device_release(edev->dev); |
| 472 | |
| 473 | dev_info(edev->dev, "%s\n", __FUNCTION__); |
| 474 | } |