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 | |
| 47 | #define MINOR_VERSION 0 /* Minor version starts at 0 */ |
| 48 | #define MINOR_COUNT 1 /* Allocate 1 minor version */ |
| 49 | #define DMA_ADDR_BITS 32 /* Number of address bits */ |
| 50 | |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame^] | 51 | #define CAPABILITIES_RESP_TIMEOUT_MS 50 |
| 52 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 53 | /**************************************************************************** |
| 54 | * Types |
| 55 | ****************************************************************************/ |
| 56 | |
| 57 | /**************************************************************************** |
| 58 | * Functions |
| 59 | ****************************************************************************/ |
| 60 | |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame^] | 61 | static void ethosu_capabilities_destroy(struct kref *kref) |
| 62 | { |
| 63 | struct ethosu_capabilities *cap = |
| 64 | container_of(kref, struct ethosu_capabilities, refcount); |
| 65 | |
| 66 | list_del(&cap->list); |
| 67 | |
| 68 | devm_kfree(cap->edev->dev, cap); |
| 69 | } |
| 70 | |
| 71 | static int ethosu_capabilities_find(struct ethosu_capabilities *cap, |
| 72 | struct list_head *capabilties_list) |
| 73 | { |
| 74 | struct ethosu_capabilities *cur; |
| 75 | |
| 76 | list_for_each_entry(cur, capabilties_list, list) { |
| 77 | if (cur == cap) |
| 78 | return 0; |
| 79 | } |
| 80 | |
| 81 | return -EINVAL; |
| 82 | } |
| 83 | |
| 84 | static int ethosu_capability_rsp(struct ethosu_device *edev, |
| 85 | struct ethosu_core_msg_capabilities_rsp *msg) |
| 86 | { |
| 87 | struct ethosu_capabilities *cap; |
| 88 | struct ethosu_uapi_device_capabilities *capabilities; |
| 89 | int ret; |
| 90 | |
| 91 | cap = (struct ethosu_capabilities *)msg->user_arg; |
| 92 | ret = ethosu_capabilities_find(cap, &edev->capabilities_list); |
| 93 | if (0 != ret) { |
| 94 | dev_warn(edev->dev, |
| 95 | "Handle not found in capabilities list. handle=0x%p\n", |
| 96 | cap); |
| 97 | |
| 98 | /* NOTE: do not call complete or kref_put on invalid data! */ |
| 99 | return ret; |
| 100 | } |
| 101 | |
| 102 | capabilities = cap->capabilities; |
| 103 | |
| 104 | capabilities->hw_id.version_status = msg->version_status; |
| 105 | capabilities->hw_id.version_minor = msg->version_minor; |
| 106 | capabilities->hw_id.version_major = msg->version_major; |
| 107 | capabilities->hw_id.product_major = msg->product_major; |
| 108 | capabilities->hw_id.arch_patch_rev = msg->arch_patch_rev; |
| 109 | capabilities->hw_id.arch_minor_rev = msg->arch_minor_rev; |
| 110 | capabilities->hw_id.arch_major_rev = msg->arch_major_rev; |
| 111 | capabilities->driver_patch_rev = msg->driver_patch_rev; |
| 112 | capabilities->driver_minor_rev = msg->driver_minor_rev; |
| 113 | capabilities->driver_major_rev = msg->driver_major_rev; |
| 114 | capabilities->hw_cfg.macs_per_cc = msg->macs_per_cc; |
| 115 | capabilities->hw_cfg.cmd_stream_version = msg->cmd_stream_version; |
| 116 | capabilities->hw_cfg.shram_size = msg->shram_size; |
| 117 | capabilities->hw_cfg.custom_dma = msg->custom_dma; |
| 118 | |
| 119 | complete(&cap->done); |
| 120 | |
| 121 | kref_put(&cap->refcount, ethosu_capabilities_destroy); |
| 122 | |
| 123 | return 0; |
| 124 | } |
| 125 | |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 126 | /* Incoming messages */ |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 127 | static int ethosu_handle_msg(struct ethosu_device *edev) |
| 128 | { |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 129 | int ret; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 130 | struct ethosu_core_msg header; |
| 131 | |
| 132 | union { |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame^] | 133 | struct ethosu_core_msg_err error; |
| 134 | struct ethosu_core_inference_rsp inf; |
| 135 | struct ethosu_core_msg_version version; |
| 136 | struct ethosu_core_msg_capabilities_rsp capabilities; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 137 | } data; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 138 | |
| 139 | /* Read message */ |
| 140 | ret = ethosu_mailbox_read(&edev->mailbox, &header, &data, sizeof(data)); |
| 141 | if (ret) |
| 142 | return ret; |
| 143 | |
| 144 | switch (header.type) { |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 145 | case ETHOSU_CORE_MSG_ERR: |
| 146 | if (header.length != sizeof(data.error)) { |
| 147 | dev_warn(edev->dev, |
| 148 | "Msg: Error message of incorrect size. size=%u, expected=%zu\n", header.length, |
| 149 | sizeof(data.error)); |
| 150 | ret = -EBADMSG; |
| 151 | break; |
| 152 | } |
| 153 | |
| 154 | data.error.msg[sizeof(data.error.msg) - 1] = '\0'; |
| 155 | dev_warn(edev->dev, "Msg: Error. type=%u, msg=\"%s\"\n", |
| 156 | data.error.type, data.error.msg); |
| 157 | ret = -EBADMSG; |
| 158 | break; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 159 | case ETHOSU_CORE_MSG_PING: |
| 160 | dev_info(edev->dev, "Msg: Ping\n"); |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 161 | ret = ethosu_mailbox_pong(&edev->mailbox); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 162 | break; |
| 163 | case ETHOSU_CORE_MSG_PONG: |
| 164 | dev_info(edev->dev, "Msg: Pong\n"); |
| 165 | break; |
| 166 | case ETHOSU_CORE_MSG_INFERENCE_RSP: |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 167 | if (header.length != sizeof(data.inf)) { |
| 168 | dev_warn(edev->dev, |
| 169 | "Msg: Inference response of incorrect size. size=%u, expected=%zu\n", header.length, |
| 170 | sizeof(data.inf)); |
| 171 | ret = -EBADMSG; |
| 172 | break; |
| 173 | } |
| 174 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 175 | dev_info(edev->dev, |
Kristofer Jonsson | b74492c | 2020-09-10 13:26:01 +0200 | [diff] [blame] | 176 | "Msg: Inference response. user_arg=0x%llx, ofm_count=%u, status=%u\n", |
| 177 | data.inf.user_arg, data.inf.ofm_count, |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 178 | data.inf.status); |
| 179 | ethosu_inference_rsp(edev, &data.inf); |
| 180 | break; |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 181 | case ETHOSU_CORE_MSG_VERSION_RSP: |
| 182 | if (header.length != sizeof(data.version)) { |
| 183 | dev_warn(edev->dev, |
| 184 | "Msg: Version response of incorrect size. size=%u, expected=%zu\n", header.length, |
| 185 | sizeof(data.version)); |
| 186 | ret = -EBADMSG; |
| 187 | break; |
| 188 | } |
| 189 | |
| 190 | dev_info(edev->dev, "Msg: Version response v%u.%u.%u\n", |
| 191 | data.version.major, data.version.minor, |
| 192 | data.version.patch); |
| 193 | |
| 194 | /* Check major and minor version match, else return error */ |
| 195 | if (data.version.major != ETHOSU_CORE_MSG_VERSION_MAJOR || |
| 196 | data.version.minor != ETHOSU_CORE_MSG_VERSION_MINOR) { |
| 197 | dev_warn(edev->dev, "Msg: Version mismatch detected! "); |
| 198 | dev_warn(edev->dev, "Local version: v%u.%u.%u\n", |
| 199 | ETHOSU_CORE_MSG_VERSION_MAJOR, |
| 200 | ETHOSU_CORE_MSG_VERSION_MINOR, |
| 201 | ETHOSU_CORE_MSG_VERSION_PATCH); |
| 202 | } |
| 203 | |
| 204 | break; |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame^] | 205 | case ETHOSU_CORE_MSG_CAPABILITIES_RSP: |
| 206 | if (header.length != sizeof(data.capabilities)) { |
| 207 | dev_warn(edev->dev, |
| 208 | "Msg: Capabilities response of incorrect size. size=%u, expected=%zu\n", header.length, |
| 209 | sizeof(data.capabilities)); |
| 210 | ret = -EBADMSG; |
| 211 | break; |
| 212 | } |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 213 | |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame^] | 214 | dev_info(edev->dev, |
| 215 | "Msg: Capabilities response ua%llx vs%hhu v%hhu.%hhu p%hhu av%hhu.%hhu.%hhu dv%hhu.%hhu.%hhu mcc%hhu csv%hhu ss%hhu cd%hhu\n", |
| 216 | data.capabilities.user_arg, |
| 217 | data.capabilities.version_status, |
| 218 | data.capabilities.version_major, |
| 219 | data.capabilities.version_minor, |
| 220 | data.capabilities.product_major, |
| 221 | data.capabilities.arch_major_rev, |
| 222 | data.capabilities.arch_minor_rev, |
| 223 | data.capabilities.arch_patch_rev, |
| 224 | data.capabilities.driver_major_rev, |
| 225 | data.capabilities.driver_minor_rev, |
| 226 | data.capabilities.driver_patch_rev, |
| 227 | data.capabilities.macs_per_cc, |
| 228 | data.capabilities.cmd_stream_version, |
| 229 | data.capabilities.shram_size, |
| 230 | data.capabilities.custom_dma); |
| 231 | |
| 232 | ret = ethosu_capability_rsp(edev, &data.capabilities); |
| 233 | break; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 234 | default: |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 235 | /* This should not happen due to version checks */ |
| 236 | dev_warn(edev->dev, "Msg: Protocol error\n"); |
| 237 | ret = -EPROTO; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 238 | break; |
| 239 | } |
| 240 | |
| 241 | return ret; |
| 242 | } |
| 243 | |
| 244 | static int ethosu_open(struct inode *inode, |
| 245 | struct file *file) |
| 246 | { |
| 247 | struct ethosu_device *edev = |
| 248 | container_of(inode->i_cdev, struct ethosu_device, cdev); |
| 249 | |
| 250 | file->private_data = edev; |
| 251 | |
| 252 | dev_info(edev->dev, "Opening device node.\n"); |
| 253 | |
| 254 | return nonseekable_open(inode, file); |
| 255 | } |
| 256 | |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame^] | 257 | static int ethosu_send_capabilities_request(struct ethosu_device *edev, |
| 258 | void __user *udata) |
| 259 | { |
| 260 | struct ethosu_uapi_device_capabilities uapi; |
| 261 | struct ethosu_capabilities *cap; |
| 262 | int ret; |
| 263 | int timeout; |
| 264 | |
| 265 | cap = devm_kzalloc(edev->dev, sizeof(struct ethosu_capabilities), |
| 266 | GFP_KERNEL); |
| 267 | if (!cap) |
| 268 | return -ENOMEM; |
| 269 | |
| 270 | cap->edev = edev; |
| 271 | cap->capabilities = &uapi; |
| 272 | kref_init(&cap->refcount); |
| 273 | init_completion(&cap->done); |
| 274 | list_add(&cap->list, &edev->capabilities_list); |
| 275 | |
| 276 | ret = ethosu_mailbox_capabilities_request(&edev->mailbox, cap); |
| 277 | if (0 != ret) |
| 278 | goto put_kref; |
| 279 | |
| 280 | /* |
| 281 | * Increase ref counter since we sent the pointer out to |
| 282 | * response handler thread. That thread is responsible to |
| 283 | * decrease the ref counter before exiting. So the memory |
| 284 | * can be freed. |
| 285 | * |
| 286 | * NOTE: if no response is received back, the memory is leaked. |
| 287 | */ |
| 288 | kref_get(&cap->refcount); |
| 289 | /* Unlock the mutex before going to block on the condition */ |
| 290 | mutex_unlock(&edev->mutex); |
| 291 | /* wait for response to arrive back */ |
| 292 | timeout = wait_for_completion_timeout(&cap->done, |
| 293 | msecs_to_jiffies( |
| 294 | CAPABILITIES_RESP_TIMEOUT_MS)); |
| 295 | /* take back the mutex before resuming to do anything */ |
| 296 | ret = mutex_lock_interruptible(&edev->mutex); |
| 297 | if (0 != ret) |
| 298 | goto put_kref; |
| 299 | |
| 300 | if (0 == timeout /* timed out*/) { |
| 301 | dev_warn(edev->dev, |
| 302 | "Msg: Capabilities response lost - timeout\n"); |
| 303 | ret = -EIO; |
| 304 | goto put_kref; |
| 305 | } |
| 306 | |
| 307 | ret = copy_to_user(udata, &uapi, sizeof(uapi)) ? -EFAULT : 0; |
| 308 | |
| 309 | put_kref: |
| 310 | kref_put(&cap->refcount, ethosu_capabilities_destroy); |
| 311 | |
| 312 | return ret; |
| 313 | } |
| 314 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 315 | static long ethosu_ioctl(struct file *file, |
| 316 | unsigned int cmd, |
| 317 | unsigned long arg) |
| 318 | { |
| 319 | struct ethosu_device *edev = file->private_data; |
| 320 | void __user *udata = (void __user *)arg; |
| 321 | int ret = -EINVAL; |
| 322 | |
| 323 | ret = mutex_lock_interruptible(&edev->mutex); |
| 324 | if (ret) |
| 325 | return ret; |
| 326 | |
| 327 | dev_info(edev->dev, "Ioctl. cmd=%u, arg=%lu\n", cmd, arg); |
| 328 | |
| 329 | switch (cmd) { |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 330 | case ETHOSU_IOCTL_VERSION_REQ: |
| 331 | dev_info(edev->dev, "Ioctl: Send version request\n"); |
| 332 | ret = ethosu_mailbox_version_request(&edev->mailbox); |
| 333 | break; |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame^] | 334 | case ETHOSU_IOCTL_CAPABILITIES_REQ: |
| 335 | dev_info(edev->dev, "Ioctl: Send capabilities request\n"); |
| 336 | ret = ethosu_send_capabilities_request(edev, udata); |
| 337 | break; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 338 | case ETHOSU_IOCTL_PING: { |
| 339 | dev_info(edev->dev, "Ioctl: Send ping\n"); |
| 340 | ret = ethosu_mailbox_ping(&edev->mailbox); |
| 341 | break; |
| 342 | } |
| 343 | case ETHOSU_IOCTL_BUFFER_CREATE: { |
| 344 | struct ethosu_uapi_buffer_create uapi; |
| 345 | |
| 346 | dev_info(edev->dev, "Ioctl: Buffer create\n"); |
| 347 | |
| 348 | if (copy_from_user(&uapi, udata, sizeof(uapi))) |
| 349 | break; |
| 350 | |
| 351 | dev_info(edev->dev, "Ioctl: Buffer. capacity=%u\n", |
| 352 | uapi.capacity); |
| 353 | |
| 354 | ret = ethosu_buffer_create(edev, uapi.capacity); |
| 355 | break; |
| 356 | } |
| 357 | case ETHOSU_IOCTL_NETWORK_CREATE: { |
| 358 | struct ethosu_uapi_network_create uapi; |
| 359 | |
| 360 | if (copy_from_user(&uapi, udata, sizeof(uapi))) |
| 361 | break; |
| 362 | |
| 363 | dev_info(edev->dev, "Ioctl: Network. fd=%u\n", uapi.fd); |
| 364 | |
| 365 | ret = ethosu_network_create(edev, &uapi); |
| 366 | break; |
| 367 | } |
| 368 | default: { |
| 369 | dev_err(edev->dev, "Invalid ioctl. cmd=%u, arg=%lu", |
| 370 | cmd, arg); |
| 371 | break; |
| 372 | } |
| 373 | } |
| 374 | |
| 375 | mutex_unlock(&edev->mutex); |
| 376 | |
| 377 | return ret; |
| 378 | } |
| 379 | |
| 380 | static void ethosu_mbox_rx(void *user_arg) |
| 381 | { |
| 382 | struct ethosu_device *edev = user_arg; |
| 383 | int ret; |
| 384 | |
| 385 | mutex_lock(&edev->mutex); |
| 386 | |
| 387 | do { |
| 388 | ret = ethosu_handle_msg(edev); |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 389 | if (ret && ret != -ENOMSG) |
| 390 | /* Need to start over in case of error, empty the queue |
| 391 | * by fast-forwarding read position to write position. |
| 392 | * */ |
| 393 | ethosu_mailbox_reset(&edev->mailbox); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 394 | } while (ret == 0); |
| 395 | |
| 396 | mutex_unlock(&edev->mutex); |
| 397 | } |
| 398 | |
| 399 | int ethosu_dev_init(struct ethosu_device *edev, |
| 400 | struct device *dev, |
| 401 | struct class *class, |
| 402 | struct resource *in_queue, |
| 403 | struct resource *out_queue) |
| 404 | { |
| 405 | static const struct file_operations fops = { |
| 406 | .owner = THIS_MODULE, |
| 407 | .open = ðosu_open, |
| 408 | .unlocked_ioctl = ðosu_ioctl, |
| 409 | #ifdef CONFIG_COMPAT |
| 410 | .compat_ioctl = ðosu_ioctl, |
| 411 | #endif |
| 412 | }; |
| 413 | struct device *sysdev; |
| 414 | int ret; |
| 415 | |
| 416 | edev->dev = dev; |
| 417 | edev->class = class; |
| 418 | mutex_init(&edev->mutex); |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame^] | 419 | INIT_LIST_HEAD(&edev->capabilities_list); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 420 | INIT_LIST_HEAD(&edev->inference_list); |
| 421 | |
| 422 | ret = of_reserved_mem_device_init(edev->dev); |
| 423 | if (ret) |
| 424 | return ret; |
| 425 | |
| 426 | dma_set_mask_and_coherent(edev->dev, DMA_BIT_MASK(DMA_ADDR_BITS)); |
| 427 | |
| 428 | ret = ethosu_mailbox_init(&edev->mailbox, dev, in_queue, out_queue, |
| 429 | ethosu_mbox_rx, edev); |
| 430 | if (ret) |
| 431 | goto release_reserved_mem; |
| 432 | |
| 433 | ret = alloc_chrdev_region(&edev->devt, MINOR_VERSION, MINOR_COUNT, |
| 434 | "ethosu"); |
| 435 | if (ret) { |
| 436 | dev_err(edev->dev, "Failed to allocate chrdev region.\n"); |
| 437 | goto deinit_mailbox; |
| 438 | } |
| 439 | |
| 440 | cdev_init(&edev->cdev, &fops); |
| 441 | edev->cdev.owner = THIS_MODULE; |
| 442 | |
| 443 | ret = cdev_add(&edev->cdev, edev->devt, MINOR_COUNT); |
| 444 | if (ret) { |
| 445 | dev_err(edev->dev, "Failed to add character device.\n"); |
| 446 | goto region_unregister; |
| 447 | } |
| 448 | |
| 449 | sysdev = device_create(edev->class, NULL, edev->devt, edev, |
| 450 | "ethosu%d", MAJOR(edev->devt)); |
| 451 | if (IS_ERR(sysdev)) { |
| 452 | dev_err(edev->dev, "Failed to create device.\n"); |
| 453 | ret = PTR_ERR(sysdev); |
| 454 | goto del_cdev; |
| 455 | } |
| 456 | |
| 457 | dev_info(edev->dev, |
| 458 | "Created Arm Ethos-U device. name=%s, major=%d, minor=%d\n", |
| 459 | dev_name(sysdev), MAJOR(edev->devt), MINOR(edev->devt)); |
| 460 | |
| 461 | return 0; |
| 462 | |
| 463 | del_cdev: |
| 464 | cdev_del(&edev->cdev); |
| 465 | |
| 466 | region_unregister: |
| 467 | unregister_chrdev_region(edev->devt, 1); |
| 468 | |
| 469 | deinit_mailbox: |
| 470 | ethosu_mailbox_deinit(&edev->mailbox); |
| 471 | |
| 472 | release_reserved_mem: |
| 473 | of_reserved_mem_device_release(edev->dev); |
| 474 | |
| 475 | return ret; |
| 476 | } |
| 477 | |
| 478 | void ethosu_dev_deinit(struct ethosu_device *edev) |
| 479 | { |
| 480 | ethosu_mailbox_deinit(&edev->mailbox); |
| 481 | device_destroy(edev->class, edev->cdev.dev); |
| 482 | cdev_del(&edev->cdev); |
| 483 | unregister_chrdev_region(edev->devt, MINOR_COUNT); |
| 484 | of_reserved_mem_device_release(edev->dev); |
| 485 | |
| 486 | dev_info(edev->dev, "%s\n", __FUNCTION__); |
| 487 | } |