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_device.h" |
| 26 | |
| 27 | #include "ethosu_buffer.h" |
| 28 | #include "ethosu_core_interface.h" |
| 29 | #include "ethosu_inference.h" |
| 30 | #include "ethosu_network.h" |
Kristofer Jonsson | 3c6a260 | 2022-03-10 11:17:29 +0100 | [diff] [blame] | 31 | #include "ethosu_network_info.h" |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 32 | #include "uapi/ethosu.h" |
| 33 | |
| 34 | #include <linux/delay.h> |
| 35 | #include <linux/dma-mapping.h> |
| 36 | #include <linux/errno.h> |
| 37 | #include <linux/fs.h> |
| 38 | #include <linux/interrupt.h> |
| 39 | #include <linux/io.h> |
| 40 | #include <linux/of_reserved_mem.h> |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame^] | 41 | #include <linux/reset.h> |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 42 | #include <linux/slab.h> |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame^] | 43 | #include <linux/uaccess.h> |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 44 | |
| 45 | /**************************************************************************** |
| 46 | * Defines |
| 47 | ****************************************************************************/ |
| 48 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 49 | #define DMA_ADDR_BITS 32 /* Number of address bits */ |
| 50 | |
Per Åstrand | bb17527 | 2021-10-25 12:37:36 +0200 | [diff] [blame] | 51 | #define CAPABILITIES_RESP_TIMEOUT_MS 2000 |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 52 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 53 | /**************************************************************************** |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 54 | * Functions |
| 55 | ****************************************************************************/ |
| 56 | |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 57 | static void ethosu_capabilities_destroy(struct kref *kref) |
| 58 | { |
| 59 | struct ethosu_capabilities *cap = |
| 60 | container_of(kref, struct ethosu_capabilities, refcount); |
| 61 | |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame^] | 62 | dev_info(cap->edev->dev, "Capabilities destroy. handle=0x%pK\n", cap); |
| 63 | |
| 64 | list_del(&cap->msg.list); |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 65 | |
| 66 | devm_kfree(cap->edev->dev, cap); |
| 67 | } |
| 68 | |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame^] | 69 | static int ethosu_capabilities_send(struct ethosu_capabilities *cap) |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 70 | { |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame^] | 71 | int ret; |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 72 | |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame^] | 73 | ret = ethosu_mailbox_capabilities_request(&cap->edev->mailbox, cap); |
| 74 | if (ret) |
| 75 | return ret; |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 76 | |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame^] | 77 | return 0; |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 78 | } |
| 79 | |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame^] | 80 | static void ethosu_capabilities_fail(struct ethosu_mailbox_msg *msg) |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 81 | { |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame^] | 82 | struct ethosu_capabilities *cap = |
| 83 | container_of(msg, typeof(*cap), msg); |
| 84 | |
| 85 | cap->errno = -EFAULT; |
| 86 | complete(&cap->done); |
| 87 | } |
| 88 | |
| 89 | static int ethosu_capabilities_resend(struct ethosu_mailbox_msg *msg) |
| 90 | { |
| 91 | struct ethosu_capabilities *cap = |
| 92 | container_of(msg, typeof(*cap), msg); |
| 93 | int ret; |
| 94 | |
| 95 | /* Don't resend request if response has already been received */ |
| 96 | if (completion_done(&cap->done)) |
| 97 | return 0; |
| 98 | |
| 99 | /* Resend request */ |
| 100 | ret = ethosu_capabilities_send(cap); |
| 101 | if (ret) |
| 102 | return ret; |
| 103 | |
| 104 | return 0; |
| 105 | } |
| 106 | |
| 107 | static void ethosu_capability_rsp(struct ethosu_device *edev, |
| 108 | struct ethosu_core_msg_capabilities_rsp *msg) |
| 109 | { |
| 110 | struct ethosu_capabilities *cap = |
| 111 | (struct ethosu_capabilities *)msg->user_arg; |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 112 | struct ethosu_uapi_device_capabilities *capabilities; |
| 113 | int ret; |
| 114 | |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame^] | 115 | ret = ethosu_mailbox_find(&edev->mailbox, &cap->msg); |
| 116 | if (ret) { |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 117 | dev_warn(edev->dev, |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame^] | 118 | "Capabilities not found in pending list. handle=0x%p\n", |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 119 | cap); |
| 120 | |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame^] | 121 | return; |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 122 | } |
| 123 | |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame^] | 124 | if (completion_done(&cap->done)) |
| 125 | return; |
| 126 | |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 127 | capabilities = cap->capabilities; |
| 128 | |
| 129 | capabilities->hw_id.version_status = msg->version_status; |
| 130 | capabilities->hw_id.version_minor = msg->version_minor; |
| 131 | capabilities->hw_id.version_major = msg->version_major; |
| 132 | capabilities->hw_id.product_major = msg->product_major; |
| 133 | capabilities->hw_id.arch_patch_rev = msg->arch_patch_rev; |
| 134 | capabilities->hw_id.arch_minor_rev = msg->arch_minor_rev; |
| 135 | capabilities->hw_id.arch_major_rev = msg->arch_major_rev; |
| 136 | capabilities->driver_patch_rev = msg->driver_patch_rev; |
| 137 | capabilities->driver_minor_rev = msg->driver_minor_rev; |
| 138 | capabilities->driver_major_rev = msg->driver_major_rev; |
| 139 | capabilities->hw_cfg.macs_per_cc = msg->macs_per_cc; |
| 140 | capabilities->hw_cfg.cmd_stream_version = msg->cmd_stream_version; |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 141 | capabilities->hw_cfg.custom_dma = msg->custom_dma; |
| 142 | |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame^] | 143 | cap->errno = 0; |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 144 | complete(&cap->done); |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame^] | 145 | } |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 146 | |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame^] | 147 | static int ethosu_capabilities_request(struct ethosu_device *edev, |
| 148 | void __user *udata) |
| 149 | { |
| 150 | struct ethosu_uapi_device_capabilities uapi; |
| 151 | struct ethosu_capabilities *cap; |
| 152 | int ret; |
| 153 | int timeout; |
| 154 | |
| 155 | cap = devm_kzalloc(edev->dev, sizeof(struct ethosu_capabilities), |
| 156 | GFP_KERNEL); |
| 157 | if (!cap) |
| 158 | return -ENOMEM; |
| 159 | |
| 160 | cap->edev = edev; |
| 161 | cap->capabilities = &uapi; |
| 162 | kref_init(&cap->refcount); |
| 163 | init_completion(&cap->done); |
| 164 | list_add(&cap->msg.list, &edev->mailbox.pending_list); |
| 165 | cap->msg.fail = ethosu_capabilities_fail; |
| 166 | cap->msg.resend = ethosu_capabilities_resend; |
| 167 | |
| 168 | ret = ethosu_capabilities_send(cap); |
| 169 | if (0 != ret) |
| 170 | goto put_kref; |
| 171 | |
| 172 | /* Unlock the mutex before going to block on the condition */ |
| 173 | mutex_unlock(&edev->mutex); |
| 174 | |
| 175 | /* wait for response to arrive back */ |
| 176 | timeout = wait_for_completion_timeout(&cap->done, |
| 177 | msecs_to_jiffies( |
| 178 | CAPABILITIES_RESP_TIMEOUT_MS)); |
| 179 | |
| 180 | /* take back the mutex before resuming to do anything */ |
| 181 | mutex_lock(&edev->mutex); |
| 182 | |
| 183 | if (0 == timeout) { |
| 184 | dev_warn(edev->dev, "Capabilities response timeout"); |
| 185 | ret = -EIO; |
| 186 | goto put_kref; |
| 187 | } |
| 188 | |
| 189 | if (cap->errno) |
| 190 | goto put_kref; |
| 191 | |
| 192 | ret = copy_to_user(udata, &uapi, sizeof(uapi)) ? -EFAULT : 0; |
| 193 | |
| 194 | put_kref: |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 195 | kref_put(&cap->refcount, ethosu_capabilities_destroy); |
| 196 | |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame^] | 197 | return ret; |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 198 | } |
| 199 | |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 200 | /* Incoming messages */ |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 201 | static int ethosu_handle_msg(struct ethosu_device *edev) |
| 202 | { |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 203 | int ret; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 204 | struct ethosu_core_msg header; |
| 205 | |
| 206 | union { |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 207 | struct ethosu_core_msg_err error; |
| 208 | struct ethosu_core_inference_rsp inf; |
| 209 | struct ethosu_core_msg_version version; |
| 210 | struct ethosu_core_msg_capabilities_rsp capabilities; |
Kristofer Jonsson | 3c6a260 | 2022-03-10 11:17:29 +0100 | [diff] [blame] | 211 | struct ethosu_core_network_info_rsp network_info; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 212 | } data; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 213 | |
| 214 | /* Read message */ |
| 215 | ret = ethosu_mailbox_read(&edev->mailbox, &header, &data, sizeof(data)); |
| 216 | if (ret) |
| 217 | return ret; |
| 218 | |
| 219 | switch (header.type) { |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 220 | case ETHOSU_CORE_MSG_ERR: |
| 221 | if (header.length != sizeof(data.error)) { |
| 222 | dev_warn(edev->dev, |
| 223 | "Msg: Error message of incorrect size. size=%u, expected=%zu\n", header.length, |
| 224 | sizeof(data.error)); |
| 225 | ret = -EBADMSG; |
| 226 | break; |
| 227 | } |
| 228 | |
| 229 | data.error.msg[sizeof(data.error.msg) - 1] = '\0'; |
| 230 | dev_warn(edev->dev, "Msg: Error. type=%u, msg=\"%s\"\n", |
| 231 | data.error.type, data.error.msg); |
| 232 | ret = -EBADMSG; |
| 233 | break; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 234 | case ETHOSU_CORE_MSG_PING: |
| 235 | dev_info(edev->dev, "Msg: Ping\n"); |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 236 | ret = ethosu_mailbox_pong(&edev->mailbox); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 237 | break; |
| 238 | case ETHOSU_CORE_MSG_PONG: |
| 239 | dev_info(edev->dev, "Msg: Pong\n"); |
| 240 | break; |
| 241 | case ETHOSU_CORE_MSG_INFERENCE_RSP: |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 242 | if (header.length != sizeof(data.inf)) { |
| 243 | dev_warn(edev->dev, |
| 244 | "Msg: Inference response of incorrect size. size=%u, expected=%zu\n", header.length, |
| 245 | sizeof(data.inf)); |
| 246 | ret = -EBADMSG; |
| 247 | break; |
| 248 | } |
| 249 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 250 | dev_info(edev->dev, |
Kristofer Jonsson | b74492c | 2020-09-10 13:26:01 +0200 | [diff] [blame] | 251 | "Msg: Inference response. user_arg=0x%llx, ofm_count=%u, status=%u\n", |
| 252 | data.inf.user_arg, data.inf.ofm_count, |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 253 | data.inf.status); |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame^] | 254 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 255 | ethosu_inference_rsp(edev, &data.inf); |
| 256 | break; |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 257 | case ETHOSU_CORE_MSG_VERSION_RSP: |
| 258 | if (header.length != sizeof(data.version)) { |
| 259 | dev_warn(edev->dev, |
| 260 | "Msg: Version response of incorrect size. size=%u, expected=%zu\n", header.length, |
| 261 | sizeof(data.version)); |
| 262 | ret = -EBADMSG; |
| 263 | break; |
| 264 | } |
| 265 | |
| 266 | dev_info(edev->dev, "Msg: Version response v%u.%u.%u\n", |
| 267 | data.version.major, data.version.minor, |
| 268 | data.version.patch); |
| 269 | |
| 270 | /* Check major and minor version match, else return error */ |
| 271 | if (data.version.major != ETHOSU_CORE_MSG_VERSION_MAJOR || |
| 272 | data.version.minor != ETHOSU_CORE_MSG_VERSION_MINOR) { |
| 273 | dev_warn(edev->dev, "Msg: Version mismatch detected! "); |
| 274 | dev_warn(edev->dev, "Local version: v%u.%u.%u\n", |
| 275 | ETHOSU_CORE_MSG_VERSION_MAJOR, |
| 276 | ETHOSU_CORE_MSG_VERSION_MINOR, |
| 277 | ETHOSU_CORE_MSG_VERSION_PATCH); |
| 278 | } |
| 279 | |
| 280 | break; |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 281 | case ETHOSU_CORE_MSG_CAPABILITIES_RSP: |
| 282 | if (header.length != sizeof(data.capabilities)) { |
| 283 | dev_warn(edev->dev, |
| 284 | "Msg: Capabilities response of incorrect size. size=%u, expected=%zu\n", header.length, |
| 285 | sizeof(data.capabilities)); |
| 286 | ret = -EBADMSG; |
| 287 | break; |
| 288 | } |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 289 | |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 290 | dev_info(edev->dev, |
Davide Grohmann | 40e23d1 | 2021-06-17 09:59:40 +0200 | [diff] [blame] | 291 | "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] | 292 | data.capabilities.user_arg, |
| 293 | data.capabilities.version_status, |
| 294 | data.capabilities.version_major, |
| 295 | data.capabilities.version_minor, |
| 296 | data.capabilities.product_major, |
| 297 | data.capabilities.arch_major_rev, |
| 298 | data.capabilities.arch_minor_rev, |
| 299 | data.capabilities.arch_patch_rev, |
| 300 | data.capabilities.driver_major_rev, |
| 301 | data.capabilities.driver_minor_rev, |
| 302 | data.capabilities.driver_patch_rev, |
| 303 | data.capabilities.macs_per_cc, |
| 304 | data.capabilities.cmd_stream_version, |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 305 | data.capabilities.custom_dma); |
| 306 | |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame^] | 307 | ethosu_capability_rsp(edev, &data.capabilities); |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 308 | break; |
Kristofer Jonsson | 3c6a260 | 2022-03-10 11:17:29 +0100 | [diff] [blame] | 309 | case ETHOSU_CORE_MSG_NETWORK_INFO_RSP: |
| 310 | if (header.length != sizeof(data.network_info)) { |
| 311 | dev_warn(edev->dev, |
| 312 | "Msg: Network info response of incorrect size. size=%u, expected=%zu\n", header.length, |
| 313 | sizeof(data.network_info)); |
| 314 | ret = -EBADMSG; |
| 315 | break; |
| 316 | } |
| 317 | |
| 318 | dev_info(edev->dev, |
| 319 | "Msg: Network info response. user_arg=0x%llx, status=%u", |
| 320 | data.network_info.user_arg, |
| 321 | data.network_info.status); |
| 322 | |
| 323 | ethosu_network_info_rsp(edev, &data.network_info); |
| 324 | |
| 325 | break; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 326 | default: |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 327 | /* This should not happen due to version checks */ |
| 328 | dev_warn(edev->dev, "Msg: Protocol error\n"); |
| 329 | ret = -EPROTO; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 330 | break; |
| 331 | } |
| 332 | |
| 333 | return ret; |
| 334 | } |
| 335 | |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame^] | 336 | static int ethosu_firmware_reset(struct ethosu_device *edev) |
| 337 | { |
| 338 | int ret; |
| 339 | |
| 340 | /* No reset control for this device */ |
| 341 | if (IS_ERR(edev->reset)) |
| 342 | return PTR_ERR(edev->reset); |
| 343 | |
| 344 | dev_info(edev->dev, "Resetting firmware."); |
| 345 | |
| 346 | ret = reset_control_assert(edev->reset); |
| 347 | if (ret) { |
| 348 | dev_warn(edev->dev, "Failed to reset assert firmware. ret=%d", |
| 349 | ret); |
| 350 | |
| 351 | return ret; |
| 352 | } |
| 353 | |
| 354 | /* Initialize mailbox header with illegal values */ |
| 355 | ethosu_mailbox_wait_prepare(&edev->mailbox); |
| 356 | |
| 357 | /* If this call fails we have a problem. We managed halt the firmware, |
| 358 | * but not to release the reset. |
| 359 | */ |
| 360 | ret = reset_control_deassert(edev->reset); |
| 361 | if (ret) { |
| 362 | dev_warn(edev->dev, "Failed to reset deassert firmware. ret=%d", |
| 363 | ret); |
| 364 | goto fail; |
| 365 | } |
| 366 | |
| 367 | /* Wait for firmware to boot up and initialize mailbox */ |
| 368 | ret = ethosu_mailbox_wait_firmware(&edev->mailbox); |
| 369 | if (ret) { |
| 370 | dev_warn(edev->dev, "Wait on firmware boot timed out. ret=%d", |
| 371 | ret); |
| 372 | goto fail; |
| 373 | } |
| 374 | |
| 375 | edev->mailbox.ping_count = 0; |
| 376 | ethosu_watchdog_reset(&edev->watchdog); |
| 377 | |
| 378 | ret = ethosu_mailbox_ping(&edev->mailbox); |
| 379 | if (ret) |
| 380 | goto fail; |
| 381 | |
| 382 | /* Resend messages */ |
| 383 | ethosu_mailbox_resend(&edev->mailbox); |
| 384 | |
| 385 | return ret; |
| 386 | |
| 387 | fail: |
| 388 | ethosu_mailbox_fail(&edev->mailbox); |
| 389 | |
| 390 | return ret; |
| 391 | } |
| 392 | |
Kristofer Jonsson | f5b98c9 | 2022-03-14 16:09:12 +0100 | [diff] [blame] | 393 | static void ethosu_watchdog_callback(struct ethosu_watchdog *wdog) |
| 394 | { |
| 395 | struct ethosu_device *edev = |
| 396 | container_of(wdog, struct ethosu_device, watchdog); |
| 397 | |
| 398 | mutex_lock(&edev->mutex); |
| 399 | |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame^] | 400 | dev_warn(edev->dev, "Device watchdog timeout. ping_count=%u", |
| 401 | edev->mailbox.ping_count); |
| 402 | |
| 403 | if (edev->mailbox.ping_count < 1) |
| 404 | ethosu_mailbox_ping(&edev->mailbox); |
| 405 | else |
| 406 | ethosu_firmware_reset(edev); |
Kristofer Jonsson | f5b98c9 | 2022-03-14 16:09:12 +0100 | [diff] [blame] | 407 | |
| 408 | mutex_unlock(&edev->mutex); |
| 409 | } |
| 410 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 411 | static int ethosu_open(struct inode *inode, |
| 412 | struct file *file) |
| 413 | { |
| 414 | struct ethosu_device *edev = |
| 415 | container_of(inode->i_cdev, struct ethosu_device, cdev); |
| 416 | |
| 417 | file->private_data = edev; |
| 418 | |
| 419 | dev_info(edev->dev, "Opening device node.\n"); |
| 420 | |
| 421 | return nonseekable_open(inode, file); |
| 422 | } |
| 423 | |
| 424 | static long ethosu_ioctl(struct file *file, |
| 425 | unsigned int cmd, |
| 426 | unsigned long arg) |
| 427 | { |
| 428 | struct ethosu_device *edev = file->private_data; |
| 429 | void __user *udata = (void __user *)arg; |
| 430 | int ret = -EINVAL; |
| 431 | |
| 432 | ret = mutex_lock_interruptible(&edev->mutex); |
| 433 | if (ret) |
| 434 | return ret; |
| 435 | |
Kristofer Jonsson | 3c6a260 | 2022-03-10 11:17:29 +0100 | [diff] [blame] | 436 | dev_info(edev->dev, "Ioctl. cmd=0x%x, arg=0x%lx\n", cmd, arg); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 437 | |
| 438 | switch (cmd) { |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 439 | case ETHOSU_IOCTL_VERSION_REQ: |
| 440 | dev_info(edev->dev, "Ioctl: Send version request\n"); |
| 441 | ret = ethosu_mailbox_version_request(&edev->mailbox); |
| 442 | break; |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 443 | case ETHOSU_IOCTL_CAPABILITIES_REQ: |
| 444 | dev_info(edev->dev, "Ioctl: Send capabilities request\n"); |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame^] | 445 | ret = ethosu_capabilities_request(edev, udata); |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 446 | break; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 447 | case ETHOSU_IOCTL_PING: { |
| 448 | dev_info(edev->dev, "Ioctl: Send ping\n"); |
| 449 | ret = ethosu_mailbox_ping(&edev->mailbox); |
| 450 | break; |
| 451 | } |
| 452 | case ETHOSU_IOCTL_BUFFER_CREATE: { |
| 453 | struct ethosu_uapi_buffer_create uapi; |
| 454 | |
| 455 | dev_info(edev->dev, "Ioctl: Buffer create\n"); |
| 456 | |
| 457 | if (copy_from_user(&uapi, udata, sizeof(uapi))) |
| 458 | break; |
| 459 | |
| 460 | dev_info(edev->dev, "Ioctl: Buffer. capacity=%u\n", |
| 461 | uapi.capacity); |
| 462 | |
| 463 | ret = ethosu_buffer_create(edev, uapi.capacity); |
| 464 | break; |
| 465 | } |
| 466 | case ETHOSU_IOCTL_NETWORK_CREATE: { |
| 467 | struct ethosu_uapi_network_create uapi; |
| 468 | |
| 469 | if (copy_from_user(&uapi, udata, sizeof(uapi))) |
| 470 | break; |
| 471 | |
| 472 | dev_info(edev->dev, "Ioctl: Network. fd=%u\n", uapi.fd); |
| 473 | |
| 474 | ret = ethosu_network_create(edev, &uapi); |
| 475 | break; |
| 476 | } |
| 477 | default: { |
| 478 | dev_err(edev->dev, "Invalid ioctl. cmd=%u, arg=%lu", |
| 479 | cmd, arg); |
| 480 | break; |
| 481 | } |
| 482 | } |
| 483 | |
| 484 | mutex_unlock(&edev->mutex); |
| 485 | |
| 486 | return ret; |
| 487 | } |
| 488 | |
| 489 | static void ethosu_mbox_rx(void *user_arg) |
| 490 | { |
| 491 | struct ethosu_device *edev = user_arg; |
| 492 | int ret; |
| 493 | |
| 494 | mutex_lock(&edev->mutex); |
| 495 | |
| 496 | do { |
| 497 | ret = ethosu_handle_msg(edev); |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 498 | if (ret && ret != -ENOMSG) |
| 499 | /* Need to start over in case of error, empty the queue |
| 500 | * by fast-forwarding read position to write position. |
| 501 | * */ |
| 502 | ethosu_mailbox_reset(&edev->mailbox); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 503 | } while (ret == 0); |
| 504 | |
| 505 | mutex_unlock(&edev->mutex); |
| 506 | } |
| 507 | |
| 508 | int ethosu_dev_init(struct ethosu_device *edev, |
| 509 | struct device *dev, |
| 510 | struct class *class, |
Kristofer Jonsson | 4aec376 | 2021-10-13 17:09:27 +0200 | [diff] [blame] | 511 | dev_t devt, |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 512 | struct resource *in_queue, |
| 513 | struct resource *out_queue) |
| 514 | { |
| 515 | static const struct file_operations fops = { |
| 516 | .owner = THIS_MODULE, |
| 517 | .open = ðosu_open, |
| 518 | .unlocked_ioctl = ðosu_ioctl, |
| 519 | #ifdef CONFIG_COMPAT |
| 520 | .compat_ioctl = ðosu_ioctl, |
| 521 | #endif |
| 522 | }; |
| 523 | struct device *sysdev; |
| 524 | int ret; |
| 525 | |
| 526 | edev->dev = dev; |
| 527 | edev->class = class; |
Kristofer Jonsson | 4aec376 | 2021-10-13 17:09:27 +0200 | [diff] [blame] | 528 | edev->devt = devt; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 529 | mutex_init(&edev->mutex); |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame^] | 530 | |
| 531 | edev->reset = devm_reset_control_get_by_index(edev->dev, 0); |
| 532 | if (IS_ERR(edev->reset)) |
| 533 | dev_warn(edev->dev, "No reset control found for this device."); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 534 | |
| 535 | ret = of_reserved_mem_device_init(edev->dev); |
| 536 | if (ret) |
| 537 | return ret; |
| 538 | |
| 539 | dma_set_mask_and_coherent(edev->dev, DMA_BIT_MASK(DMA_ADDR_BITS)); |
| 540 | |
Kristofer Jonsson | f5b98c9 | 2022-03-14 16:09:12 +0100 | [diff] [blame] | 541 | ret = ethosu_watchdog_init(&edev->watchdog, dev, |
| 542 | ethosu_watchdog_callback); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 543 | if (ret) |
| 544 | goto release_reserved_mem; |
| 545 | |
Kristofer Jonsson | f5b98c9 | 2022-03-14 16:09:12 +0100 | [diff] [blame] | 546 | ret = ethosu_mailbox_init(&edev->mailbox, dev, in_queue, out_queue, |
| 547 | ethosu_mbox_rx, edev, &edev->watchdog); |
| 548 | if (ret) |
| 549 | goto deinit_watchdog; |
| 550 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 551 | cdev_init(&edev->cdev, &fops); |
| 552 | edev->cdev.owner = THIS_MODULE; |
| 553 | |
Kristofer Jonsson | 4aec376 | 2021-10-13 17:09:27 +0200 | [diff] [blame] | 554 | ret = cdev_add(&edev->cdev, edev->devt, 1); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 555 | if (ret) { |
| 556 | dev_err(edev->dev, "Failed to add character device.\n"); |
Kristofer Jonsson | 4aec376 | 2021-10-13 17:09:27 +0200 | [diff] [blame] | 557 | goto deinit_mailbox; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 558 | } |
| 559 | |
| 560 | sysdev = device_create(edev->class, NULL, edev->devt, edev, |
Kristofer Jonsson | 4aec376 | 2021-10-13 17:09:27 +0200 | [diff] [blame] | 561 | "ethosu%d", MINOR(edev->devt)); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 562 | if (IS_ERR(sysdev)) { |
| 563 | dev_err(edev->dev, "Failed to create device.\n"); |
| 564 | ret = PTR_ERR(sysdev); |
| 565 | goto del_cdev; |
| 566 | } |
| 567 | |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame^] | 568 | ethosu_firmware_reset(edev); |
| 569 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 570 | dev_info(edev->dev, |
| 571 | "Created Arm Ethos-U device. name=%s, major=%d, minor=%d\n", |
| 572 | dev_name(sysdev), MAJOR(edev->devt), MINOR(edev->devt)); |
| 573 | |
| 574 | return 0; |
| 575 | |
| 576 | del_cdev: |
| 577 | cdev_del(&edev->cdev); |
| 578 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 579 | deinit_mailbox: |
| 580 | ethosu_mailbox_deinit(&edev->mailbox); |
| 581 | |
Kristofer Jonsson | f5b98c9 | 2022-03-14 16:09:12 +0100 | [diff] [blame] | 582 | deinit_watchdog: |
| 583 | ethosu_watchdog_deinit(&edev->watchdog); |
| 584 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 585 | release_reserved_mem: |
| 586 | of_reserved_mem_device_release(edev->dev); |
| 587 | |
| 588 | return ret; |
| 589 | } |
| 590 | |
| 591 | void ethosu_dev_deinit(struct ethosu_device *edev) |
| 592 | { |
| 593 | ethosu_mailbox_deinit(&edev->mailbox); |
Kristofer Jonsson | f5b98c9 | 2022-03-14 16:09:12 +0100 | [diff] [blame] | 594 | ethosu_watchdog_deinit(&edev->watchdog); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 595 | device_destroy(edev->class, edev->cdev.dev); |
| 596 | cdev_del(&edev->cdev); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 597 | of_reserved_mem_device_release(edev->dev); |
| 598 | |
| 599 | dev_info(edev->dev, "%s\n", __FUNCTION__); |
| 600 | } |