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" |
Davide Grohmann | 7e8f508 | 2022-03-23 12:48:45 +0100 | [diff] [blame] | 30 | #include "ethosu_cancel_inference.h" |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 31 | #include "ethosu_network.h" |
Kristofer Jonsson | 3c6a260 | 2022-03-10 11:17:29 +0100 | [diff] [blame] | 32 | #include "ethosu_network_info.h" |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 33 | #include "uapi/ethosu.h" |
| 34 | |
| 35 | #include <linux/delay.h> |
| 36 | #include <linux/dma-mapping.h> |
| 37 | #include <linux/errno.h> |
| 38 | #include <linux/fs.h> |
| 39 | #include <linux/interrupt.h> |
| 40 | #include <linux/io.h> |
| 41 | #include <linux/of_reserved_mem.h> |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame] | 42 | #include <linux/reset.h> |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 43 | #include <linux/slab.h> |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame] | 44 | #include <linux/uaccess.h> |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 45 | |
| 46 | /**************************************************************************** |
| 47 | * Defines |
| 48 | ****************************************************************************/ |
| 49 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 50 | #define DMA_ADDR_BITS 32 /* Number of address bits */ |
| 51 | |
Per Åstrand | bb17527 | 2021-10-25 12:37:36 +0200 | [diff] [blame] | 52 | #define CAPABILITIES_RESP_TIMEOUT_MS 2000 |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 53 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 54 | /**************************************************************************** |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 55 | * Functions |
| 56 | ****************************************************************************/ |
| 57 | |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 58 | static void ethosu_capabilities_destroy(struct kref *kref) |
| 59 | { |
| 60 | struct ethosu_capabilities *cap = |
| 61 | container_of(kref, struct ethosu_capabilities, refcount); |
| 62 | |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame] | 63 | dev_info(cap->edev->dev, "Capabilities destroy. handle=0x%pK\n", cap); |
| 64 | |
| 65 | list_del(&cap->msg.list); |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 66 | |
| 67 | devm_kfree(cap->edev->dev, cap); |
| 68 | } |
| 69 | |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame] | 70 | static int ethosu_capabilities_send(struct ethosu_capabilities *cap) |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 71 | { |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame] | 72 | int ret; |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 73 | |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame] | 74 | ret = ethosu_mailbox_capabilities_request(&cap->edev->mailbox, cap); |
| 75 | if (ret) |
| 76 | return ret; |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 77 | |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame] | 78 | return 0; |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 79 | } |
| 80 | |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame] | 81 | static void ethosu_capabilities_fail(struct ethosu_mailbox_msg *msg) |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 82 | { |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame] | 83 | struct ethosu_capabilities *cap = |
| 84 | container_of(msg, typeof(*cap), msg); |
| 85 | |
Davide Grohmann | 8b1fe55 | 2022-04-07 16:58:32 +0200 | [diff] [blame] | 86 | if (completion_done(&cap->done)) |
| 87 | return; |
| 88 | |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame] | 89 | cap->errno = -EFAULT; |
| 90 | complete(&cap->done); |
| 91 | } |
| 92 | |
| 93 | static int ethosu_capabilities_resend(struct ethosu_mailbox_msg *msg) |
| 94 | { |
| 95 | struct ethosu_capabilities *cap = |
| 96 | container_of(msg, typeof(*cap), msg); |
| 97 | int ret; |
| 98 | |
| 99 | /* Don't resend request if response has already been received */ |
| 100 | if (completion_done(&cap->done)) |
| 101 | return 0; |
| 102 | |
| 103 | /* Resend request */ |
| 104 | ret = ethosu_capabilities_send(cap); |
| 105 | if (ret) |
| 106 | return ret; |
| 107 | |
| 108 | return 0; |
| 109 | } |
| 110 | |
| 111 | static void ethosu_capability_rsp(struct ethosu_device *edev, |
| 112 | struct ethosu_core_msg_capabilities_rsp *msg) |
| 113 | { |
| 114 | struct ethosu_capabilities *cap = |
| 115 | (struct ethosu_capabilities *)msg->user_arg; |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 116 | struct ethosu_uapi_device_capabilities *capabilities; |
| 117 | int ret; |
| 118 | |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame] | 119 | ret = ethosu_mailbox_find(&edev->mailbox, &cap->msg); |
| 120 | if (ret) { |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 121 | dev_warn(edev->dev, |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame] | 122 | "Capabilities not found in pending list. handle=0x%p\n", |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 123 | cap); |
| 124 | |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame] | 125 | return; |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 126 | } |
| 127 | |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame] | 128 | if (completion_done(&cap->done)) |
| 129 | return; |
| 130 | |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 131 | capabilities = cap->capabilities; |
| 132 | |
| 133 | capabilities->hw_id.version_status = msg->version_status; |
| 134 | capabilities->hw_id.version_minor = msg->version_minor; |
| 135 | capabilities->hw_id.version_major = msg->version_major; |
| 136 | capabilities->hw_id.product_major = msg->product_major; |
| 137 | capabilities->hw_id.arch_patch_rev = msg->arch_patch_rev; |
| 138 | capabilities->hw_id.arch_minor_rev = msg->arch_minor_rev; |
| 139 | capabilities->hw_id.arch_major_rev = msg->arch_major_rev; |
| 140 | capabilities->driver_patch_rev = msg->driver_patch_rev; |
| 141 | capabilities->driver_minor_rev = msg->driver_minor_rev; |
| 142 | capabilities->driver_major_rev = msg->driver_major_rev; |
| 143 | capabilities->hw_cfg.macs_per_cc = msg->macs_per_cc; |
| 144 | capabilities->hw_cfg.cmd_stream_version = msg->cmd_stream_version; |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 145 | capabilities->hw_cfg.custom_dma = msg->custom_dma; |
| 146 | |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame] | 147 | cap->errno = 0; |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 148 | complete(&cap->done); |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame] | 149 | } |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 150 | |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame] | 151 | static int ethosu_capabilities_request(struct ethosu_device *edev, |
| 152 | void __user *udata) |
| 153 | { |
| 154 | struct ethosu_uapi_device_capabilities uapi; |
| 155 | struct ethosu_capabilities *cap; |
| 156 | int ret; |
| 157 | int timeout; |
| 158 | |
| 159 | cap = devm_kzalloc(edev->dev, sizeof(struct ethosu_capabilities), |
| 160 | GFP_KERNEL); |
| 161 | if (!cap) |
| 162 | return -ENOMEM; |
| 163 | |
| 164 | cap->edev = edev; |
| 165 | cap->capabilities = &uapi; |
| 166 | kref_init(&cap->refcount); |
| 167 | init_completion(&cap->done); |
| 168 | list_add(&cap->msg.list, &edev->mailbox.pending_list); |
| 169 | cap->msg.fail = ethosu_capabilities_fail; |
| 170 | cap->msg.resend = ethosu_capabilities_resend; |
| 171 | |
| 172 | ret = ethosu_capabilities_send(cap); |
| 173 | if (0 != ret) |
| 174 | goto put_kref; |
| 175 | |
| 176 | /* Unlock the mutex before going to block on the condition */ |
| 177 | mutex_unlock(&edev->mutex); |
| 178 | |
| 179 | /* wait for response to arrive back */ |
| 180 | timeout = wait_for_completion_timeout(&cap->done, |
| 181 | msecs_to_jiffies( |
| 182 | CAPABILITIES_RESP_TIMEOUT_MS)); |
| 183 | |
| 184 | /* take back the mutex before resuming to do anything */ |
| 185 | mutex_lock(&edev->mutex); |
| 186 | |
| 187 | if (0 == timeout) { |
| 188 | dev_warn(edev->dev, "Capabilities response timeout"); |
| 189 | ret = -EIO; |
| 190 | goto put_kref; |
| 191 | } |
| 192 | |
| 193 | if (cap->errno) |
| 194 | goto put_kref; |
| 195 | |
| 196 | ret = copy_to_user(udata, &uapi, sizeof(uapi)) ? -EFAULT : 0; |
| 197 | |
| 198 | put_kref: |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 199 | kref_put(&cap->refcount, ethosu_capabilities_destroy); |
| 200 | |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame] | 201 | return ret; |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 202 | } |
| 203 | |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 204 | /* Incoming messages */ |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 205 | static int ethosu_handle_msg(struct ethosu_device *edev) |
| 206 | { |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 207 | int ret; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 208 | struct ethosu_core_msg header; |
| 209 | |
| 210 | union { |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 211 | struct ethosu_core_msg_err error; |
| 212 | struct ethosu_core_inference_rsp inf; |
| 213 | struct ethosu_core_msg_version version; |
| 214 | struct ethosu_core_msg_capabilities_rsp capabilities; |
Kristofer Jonsson | 3c6a260 | 2022-03-10 11:17:29 +0100 | [diff] [blame] | 215 | struct ethosu_core_network_info_rsp network_info; |
Davide Grohmann | 7e8f508 | 2022-03-23 12:48:45 +0100 | [diff] [blame] | 216 | struct ethosu_core_cancel_inference_rsp cancellation; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 217 | } data; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 218 | |
| 219 | /* Read message */ |
| 220 | ret = ethosu_mailbox_read(&edev->mailbox, &header, &data, sizeof(data)); |
| 221 | if (ret) |
| 222 | return ret; |
| 223 | |
| 224 | switch (header.type) { |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 225 | case ETHOSU_CORE_MSG_ERR: |
| 226 | if (header.length != sizeof(data.error)) { |
| 227 | dev_warn(edev->dev, |
| 228 | "Msg: Error message of incorrect size. size=%u, expected=%zu\n", header.length, |
| 229 | sizeof(data.error)); |
| 230 | ret = -EBADMSG; |
| 231 | break; |
| 232 | } |
| 233 | |
| 234 | data.error.msg[sizeof(data.error.msg) - 1] = '\0'; |
| 235 | dev_warn(edev->dev, "Msg: Error. type=%u, msg=\"%s\"\n", |
| 236 | data.error.type, data.error.msg); |
| 237 | ret = -EBADMSG; |
| 238 | break; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 239 | case ETHOSU_CORE_MSG_PING: |
| 240 | dev_info(edev->dev, "Msg: Ping\n"); |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 241 | ret = ethosu_mailbox_pong(&edev->mailbox); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 242 | break; |
| 243 | case ETHOSU_CORE_MSG_PONG: |
| 244 | dev_info(edev->dev, "Msg: Pong\n"); |
| 245 | break; |
| 246 | case ETHOSU_CORE_MSG_INFERENCE_RSP: |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 247 | if (header.length != sizeof(data.inf)) { |
| 248 | dev_warn(edev->dev, |
| 249 | "Msg: Inference response of incorrect size. size=%u, expected=%zu\n", header.length, |
| 250 | sizeof(data.inf)); |
| 251 | ret = -EBADMSG; |
| 252 | break; |
| 253 | } |
| 254 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 255 | dev_info(edev->dev, |
Kristofer Jonsson | b74492c | 2020-09-10 13:26:01 +0200 | [diff] [blame] | 256 | "Msg: Inference response. user_arg=0x%llx, ofm_count=%u, status=%u\n", |
| 257 | data.inf.user_arg, data.inf.ofm_count, |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 258 | data.inf.status); |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame] | 259 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 260 | ethosu_inference_rsp(edev, &data.inf); |
| 261 | break; |
Davide Grohmann | 7e8f508 | 2022-03-23 12:48:45 +0100 | [diff] [blame] | 262 | case ETHOSU_CORE_MSG_CANCEL_INFERENCE_RSP: |
| 263 | if (header.length != sizeof(data.cancellation)) { |
| 264 | dev_warn(edev->dev, |
| 265 | "Msg: Cancel Inference response of incorrect size. size=%u, expected=%zu\n", header.length, |
| 266 | sizeof(data.cancellation)); |
| 267 | ret = -EBADMSG; |
| 268 | break; |
| 269 | } |
| 270 | |
| 271 | dev_info(edev->dev, |
| 272 | "Msg: Cancel Inference response. user_arg=0x%llx, status=%u\n", |
| 273 | data.cancellation.user_arg, data.cancellation.status); |
| 274 | ethosu_cancel_inference_rsp(edev, &data.cancellation); |
| 275 | break; |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 276 | case ETHOSU_CORE_MSG_VERSION_RSP: |
| 277 | if (header.length != sizeof(data.version)) { |
| 278 | dev_warn(edev->dev, |
| 279 | "Msg: Version response of incorrect size. size=%u, expected=%zu\n", header.length, |
| 280 | sizeof(data.version)); |
| 281 | ret = -EBADMSG; |
| 282 | break; |
| 283 | } |
| 284 | |
| 285 | dev_info(edev->dev, "Msg: Version response v%u.%u.%u\n", |
| 286 | data.version.major, data.version.minor, |
| 287 | data.version.patch); |
| 288 | |
| 289 | /* Check major and minor version match, else return error */ |
| 290 | if (data.version.major != ETHOSU_CORE_MSG_VERSION_MAJOR || |
| 291 | data.version.minor != ETHOSU_CORE_MSG_VERSION_MINOR) { |
| 292 | dev_warn(edev->dev, "Msg: Version mismatch detected! "); |
| 293 | dev_warn(edev->dev, "Local version: v%u.%u.%u\n", |
| 294 | ETHOSU_CORE_MSG_VERSION_MAJOR, |
| 295 | ETHOSU_CORE_MSG_VERSION_MINOR, |
| 296 | ETHOSU_CORE_MSG_VERSION_PATCH); |
| 297 | } |
| 298 | |
| 299 | break; |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 300 | case ETHOSU_CORE_MSG_CAPABILITIES_RSP: |
| 301 | if (header.length != sizeof(data.capabilities)) { |
| 302 | dev_warn(edev->dev, |
| 303 | "Msg: Capabilities response of incorrect size. size=%u, expected=%zu\n", header.length, |
| 304 | sizeof(data.capabilities)); |
| 305 | ret = -EBADMSG; |
| 306 | break; |
| 307 | } |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 308 | |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 309 | dev_info(edev->dev, |
Davide Grohmann | 40e23d1 | 2021-06-17 09:59:40 +0200 | [diff] [blame] | 310 | "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] | 311 | data.capabilities.user_arg, |
| 312 | data.capabilities.version_status, |
| 313 | data.capabilities.version_major, |
| 314 | data.capabilities.version_minor, |
| 315 | data.capabilities.product_major, |
| 316 | data.capabilities.arch_major_rev, |
| 317 | data.capabilities.arch_minor_rev, |
| 318 | data.capabilities.arch_patch_rev, |
| 319 | data.capabilities.driver_major_rev, |
| 320 | data.capabilities.driver_minor_rev, |
| 321 | data.capabilities.driver_patch_rev, |
| 322 | data.capabilities.macs_per_cc, |
| 323 | data.capabilities.cmd_stream_version, |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 324 | data.capabilities.custom_dma); |
| 325 | |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame] | 326 | ethosu_capability_rsp(edev, &data.capabilities); |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 327 | break; |
Kristofer Jonsson | 3c6a260 | 2022-03-10 11:17:29 +0100 | [diff] [blame] | 328 | case ETHOSU_CORE_MSG_NETWORK_INFO_RSP: |
| 329 | if (header.length != sizeof(data.network_info)) { |
| 330 | dev_warn(edev->dev, |
| 331 | "Msg: Network info response of incorrect size. size=%u, expected=%zu\n", header.length, |
| 332 | sizeof(data.network_info)); |
| 333 | ret = -EBADMSG; |
| 334 | break; |
| 335 | } |
| 336 | |
| 337 | dev_info(edev->dev, |
| 338 | "Msg: Network info response. user_arg=0x%llx, status=%u", |
| 339 | data.network_info.user_arg, |
| 340 | data.network_info.status); |
| 341 | |
| 342 | ethosu_network_info_rsp(edev, &data.network_info); |
| 343 | |
| 344 | break; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 345 | default: |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 346 | /* This should not happen due to version checks */ |
| 347 | dev_warn(edev->dev, "Msg: Protocol error\n"); |
| 348 | ret = -EPROTO; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 349 | break; |
| 350 | } |
| 351 | |
| 352 | return ret; |
| 353 | } |
| 354 | |
Davide Grohmann | 8b1fe55 | 2022-04-07 16:58:32 +0200 | [diff] [blame] | 355 | int ethosu_firmware_reset(struct ethosu_device *edev) |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame] | 356 | { |
| 357 | int ret; |
| 358 | |
| 359 | /* No reset control for this device */ |
| 360 | if (IS_ERR(edev->reset)) |
| 361 | return PTR_ERR(edev->reset); |
| 362 | |
| 363 | dev_info(edev->dev, "Resetting firmware."); |
| 364 | |
| 365 | ret = reset_control_assert(edev->reset); |
| 366 | if (ret) { |
Davide Grohmann | 8b1fe55 | 2022-04-07 16:58:32 +0200 | [diff] [blame] | 367 | dev_err(edev->dev, "Failed to reset assert firmware. ret=%d", |
| 368 | ret); |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame] | 369 | |
| 370 | return ret; |
| 371 | } |
| 372 | |
| 373 | /* Initialize mailbox header with illegal values */ |
| 374 | ethosu_mailbox_wait_prepare(&edev->mailbox); |
| 375 | |
| 376 | /* If this call fails we have a problem. We managed halt the firmware, |
| 377 | * but not to release the reset. |
| 378 | */ |
| 379 | ret = reset_control_deassert(edev->reset); |
| 380 | if (ret) { |
Davide Grohmann | 8b1fe55 | 2022-04-07 16:58:32 +0200 | [diff] [blame] | 381 | dev_err(edev->dev, "Failed to reset deassert firmware. ret=%d", |
| 382 | ret); |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame] | 383 | goto fail; |
| 384 | } |
| 385 | |
| 386 | /* Wait for firmware to boot up and initialize mailbox */ |
| 387 | ret = ethosu_mailbox_wait_firmware(&edev->mailbox); |
| 388 | if (ret) { |
Davide Grohmann | 8b1fe55 | 2022-04-07 16:58:32 +0200 | [diff] [blame] | 389 | dev_err(edev->dev, "Wait on firmware boot timed out. ret=%d", |
| 390 | ret); |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame] | 391 | goto fail; |
| 392 | } |
| 393 | |
| 394 | edev->mailbox.ping_count = 0; |
| 395 | ethosu_watchdog_reset(&edev->watchdog); |
| 396 | |
| 397 | ret = ethosu_mailbox_ping(&edev->mailbox); |
Davide Grohmann | 8b1fe55 | 2022-04-07 16:58:32 +0200 | [diff] [blame] | 398 | if (ret) { |
| 399 | dev_warn(edev->dev, |
| 400 | "Failed to send ping after firmware reset. ret=%d", |
| 401 | ret); |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame] | 402 | goto fail; |
Davide Grohmann | 8b1fe55 | 2022-04-07 16:58:32 +0200 | [diff] [blame] | 403 | } |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame] | 404 | |
| 405 | /* Resend messages */ |
| 406 | ethosu_mailbox_resend(&edev->mailbox); |
| 407 | |
| 408 | return ret; |
| 409 | |
| 410 | fail: |
| 411 | ethosu_mailbox_fail(&edev->mailbox); |
| 412 | |
| 413 | return ret; |
| 414 | } |
| 415 | |
Kristofer Jonsson | f5b98c9 | 2022-03-14 16:09:12 +0100 | [diff] [blame] | 416 | static void ethosu_watchdog_callback(struct ethosu_watchdog *wdog) |
| 417 | { |
| 418 | struct ethosu_device *edev = |
| 419 | container_of(wdog, struct ethosu_device, watchdog); |
| 420 | |
| 421 | mutex_lock(&edev->mutex); |
| 422 | |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame] | 423 | dev_warn(edev->dev, "Device watchdog timeout. ping_count=%u", |
| 424 | edev->mailbox.ping_count); |
| 425 | |
| 426 | if (edev->mailbox.ping_count < 1) |
| 427 | ethosu_mailbox_ping(&edev->mailbox); |
| 428 | else |
| 429 | ethosu_firmware_reset(edev); |
Kristofer Jonsson | f5b98c9 | 2022-03-14 16:09:12 +0100 | [diff] [blame] | 430 | |
| 431 | mutex_unlock(&edev->mutex); |
| 432 | } |
| 433 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 434 | static int ethosu_open(struct inode *inode, |
| 435 | struct file *file) |
| 436 | { |
| 437 | struct ethosu_device *edev = |
| 438 | container_of(inode->i_cdev, struct ethosu_device, cdev); |
| 439 | |
| 440 | file->private_data = edev; |
| 441 | |
| 442 | dev_info(edev->dev, "Opening device node.\n"); |
| 443 | |
| 444 | return nonseekable_open(inode, file); |
| 445 | } |
| 446 | |
| 447 | static long ethosu_ioctl(struct file *file, |
| 448 | unsigned int cmd, |
| 449 | unsigned long arg) |
| 450 | { |
| 451 | struct ethosu_device *edev = file->private_data; |
| 452 | void __user *udata = (void __user *)arg; |
| 453 | int ret = -EINVAL; |
| 454 | |
| 455 | ret = mutex_lock_interruptible(&edev->mutex); |
| 456 | if (ret) |
| 457 | return ret; |
| 458 | |
Kristofer Jonsson | 3c6a260 | 2022-03-10 11:17:29 +0100 | [diff] [blame] | 459 | 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] | 460 | |
| 461 | switch (cmd) { |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 462 | case ETHOSU_IOCTL_VERSION_REQ: |
| 463 | dev_info(edev->dev, "Ioctl: Send version request\n"); |
| 464 | ret = ethosu_mailbox_version_request(&edev->mailbox); |
| 465 | break; |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 466 | case ETHOSU_IOCTL_CAPABILITIES_REQ: |
| 467 | dev_info(edev->dev, "Ioctl: Send capabilities request\n"); |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame] | 468 | ret = ethosu_capabilities_request(edev, udata); |
Davide Grohmann | 35ce6c8 | 2021-06-01 15:03:51 +0200 | [diff] [blame] | 469 | break; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 470 | case ETHOSU_IOCTL_PING: { |
| 471 | dev_info(edev->dev, "Ioctl: Send ping\n"); |
| 472 | ret = ethosu_mailbox_ping(&edev->mailbox); |
| 473 | break; |
| 474 | } |
| 475 | case ETHOSU_IOCTL_BUFFER_CREATE: { |
| 476 | struct ethosu_uapi_buffer_create uapi; |
| 477 | |
| 478 | dev_info(edev->dev, "Ioctl: Buffer create\n"); |
| 479 | |
| 480 | if (copy_from_user(&uapi, udata, sizeof(uapi))) |
| 481 | break; |
| 482 | |
| 483 | dev_info(edev->dev, "Ioctl: Buffer. capacity=%u\n", |
| 484 | uapi.capacity); |
| 485 | |
| 486 | ret = ethosu_buffer_create(edev, uapi.capacity); |
| 487 | break; |
| 488 | } |
| 489 | case ETHOSU_IOCTL_NETWORK_CREATE: { |
| 490 | struct ethosu_uapi_network_create uapi; |
| 491 | |
| 492 | if (copy_from_user(&uapi, udata, sizeof(uapi))) |
| 493 | break; |
| 494 | |
| 495 | dev_info(edev->dev, "Ioctl: Network. fd=%u\n", uapi.fd); |
| 496 | |
| 497 | ret = ethosu_network_create(edev, &uapi); |
| 498 | break; |
| 499 | } |
| 500 | default: { |
| 501 | dev_err(edev->dev, "Invalid ioctl. cmd=%u, arg=%lu", |
| 502 | cmd, arg); |
| 503 | break; |
| 504 | } |
| 505 | } |
| 506 | |
| 507 | mutex_unlock(&edev->mutex); |
| 508 | |
| 509 | return ret; |
| 510 | } |
| 511 | |
| 512 | static void ethosu_mbox_rx(void *user_arg) |
| 513 | { |
| 514 | struct ethosu_device *edev = user_arg; |
| 515 | int ret; |
| 516 | |
| 517 | mutex_lock(&edev->mutex); |
| 518 | |
| 519 | do { |
| 520 | ret = ethosu_handle_msg(edev); |
Jonny Svärd | 7c24c77 | 2021-01-14 19:53:17 +0100 | [diff] [blame] | 521 | if (ret && ret != -ENOMSG) |
| 522 | /* Need to start over in case of error, empty the queue |
| 523 | * by fast-forwarding read position to write position. |
| 524 | * */ |
| 525 | ethosu_mailbox_reset(&edev->mailbox); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 526 | } while (ret == 0); |
| 527 | |
| 528 | mutex_unlock(&edev->mutex); |
| 529 | } |
| 530 | |
| 531 | int ethosu_dev_init(struct ethosu_device *edev, |
| 532 | struct device *dev, |
| 533 | struct class *class, |
Kristofer Jonsson | 4aec376 | 2021-10-13 17:09:27 +0200 | [diff] [blame] | 534 | dev_t devt, |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 535 | struct resource *in_queue, |
| 536 | struct resource *out_queue) |
| 537 | { |
| 538 | static const struct file_operations fops = { |
| 539 | .owner = THIS_MODULE, |
| 540 | .open = ðosu_open, |
| 541 | .unlocked_ioctl = ðosu_ioctl, |
| 542 | #ifdef CONFIG_COMPAT |
| 543 | .compat_ioctl = ðosu_ioctl, |
| 544 | #endif |
| 545 | }; |
| 546 | struct device *sysdev; |
| 547 | int ret; |
| 548 | |
| 549 | edev->dev = dev; |
| 550 | edev->class = class; |
Kristofer Jonsson | 4aec376 | 2021-10-13 17:09:27 +0200 | [diff] [blame] | 551 | edev->devt = devt; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 552 | mutex_init(&edev->mutex); |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame] | 553 | |
| 554 | edev->reset = devm_reset_control_get_by_index(edev->dev, 0); |
| 555 | if (IS_ERR(edev->reset)) |
| 556 | dev_warn(edev->dev, "No reset control found for this device."); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 557 | |
| 558 | ret = of_reserved_mem_device_init(edev->dev); |
| 559 | if (ret) |
| 560 | return ret; |
| 561 | |
| 562 | dma_set_mask_and_coherent(edev->dev, DMA_BIT_MASK(DMA_ADDR_BITS)); |
| 563 | |
Kristofer Jonsson | f5b98c9 | 2022-03-14 16:09:12 +0100 | [diff] [blame] | 564 | ret = ethosu_watchdog_init(&edev->watchdog, dev, |
| 565 | ethosu_watchdog_callback); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 566 | if (ret) |
| 567 | goto release_reserved_mem; |
| 568 | |
Kristofer Jonsson | f5b98c9 | 2022-03-14 16:09:12 +0100 | [diff] [blame] | 569 | ret = ethosu_mailbox_init(&edev->mailbox, dev, in_queue, out_queue, |
| 570 | ethosu_mbox_rx, edev, &edev->watchdog); |
| 571 | if (ret) |
| 572 | goto deinit_watchdog; |
| 573 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 574 | cdev_init(&edev->cdev, &fops); |
| 575 | edev->cdev.owner = THIS_MODULE; |
| 576 | |
Kristofer Jonsson | 4aec376 | 2021-10-13 17:09:27 +0200 | [diff] [blame] | 577 | ret = cdev_add(&edev->cdev, edev->devt, 1); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 578 | if (ret) { |
| 579 | dev_err(edev->dev, "Failed to add character device.\n"); |
Kristofer Jonsson | 4aec376 | 2021-10-13 17:09:27 +0200 | [diff] [blame] | 580 | goto deinit_mailbox; |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 581 | } |
| 582 | |
| 583 | sysdev = device_create(edev->class, NULL, edev->devt, edev, |
Kristofer Jonsson | 4aec376 | 2021-10-13 17:09:27 +0200 | [diff] [blame] | 584 | "ethosu%d", MINOR(edev->devt)); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 585 | if (IS_ERR(sysdev)) { |
| 586 | dev_err(edev->dev, "Failed to create device.\n"); |
| 587 | ret = PTR_ERR(sysdev); |
| 588 | goto del_cdev; |
| 589 | } |
| 590 | |
Kristofer Jonsson | 442fefb | 2022-03-17 17:15:52 +0100 | [diff] [blame] | 591 | ethosu_firmware_reset(edev); |
| 592 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 593 | dev_info(edev->dev, |
| 594 | "Created Arm Ethos-U device. name=%s, major=%d, minor=%d\n", |
| 595 | dev_name(sysdev), MAJOR(edev->devt), MINOR(edev->devt)); |
| 596 | |
| 597 | return 0; |
| 598 | |
| 599 | del_cdev: |
| 600 | cdev_del(&edev->cdev); |
| 601 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 602 | deinit_mailbox: |
| 603 | ethosu_mailbox_deinit(&edev->mailbox); |
| 604 | |
Kristofer Jonsson | f5b98c9 | 2022-03-14 16:09:12 +0100 | [diff] [blame] | 605 | deinit_watchdog: |
| 606 | ethosu_watchdog_deinit(&edev->watchdog); |
| 607 | |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 608 | release_reserved_mem: |
| 609 | of_reserved_mem_device_release(edev->dev); |
| 610 | |
| 611 | return ret; |
| 612 | } |
| 613 | |
| 614 | void ethosu_dev_deinit(struct ethosu_device *edev) |
| 615 | { |
| 616 | ethosu_mailbox_deinit(&edev->mailbox); |
Kristofer Jonsson | f5b98c9 | 2022-03-14 16:09:12 +0100 | [diff] [blame] | 617 | ethosu_watchdog_deinit(&edev->watchdog); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 618 | device_destroy(edev->class, edev->cdev.dev); |
| 619 | cdev_del(&edev->cdev); |
Kristofer Jonsson | 116a635 | 2020-08-20 17:25:23 +0200 | [diff] [blame] | 620 | of_reserved_mem_device_release(edev->dev); |
| 621 | |
| 622 | dev_info(edev->dev, "%s\n", __FUNCTION__); |
| 623 | } |