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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 | // SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2018-2019, Intel Corporation */ #include <linux/arm-smccc.h> #include <linux/bitfield.h> #include <linux/completion.h> #include <linux/kobject.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/of.h> #include <linux/of_platform.h> #include <linux/platform_device.h> #include <linux/firmware/intel/stratix10-svc-client.h> #include <linux/string.h> #include <linux/sysfs.h> #define RSU_STATE_MASK GENMASK_ULL(31, 0) #define RSU_VERSION_MASK GENMASK_ULL(63, 32) #define RSU_ERROR_LOCATION_MASK GENMASK_ULL(31, 0) #define RSU_ERROR_DETAIL_MASK GENMASK_ULL(63, 32) #define RSU_DCMF0_MASK GENMASK_ULL(31, 0) #define RSU_DCMF1_MASK GENMASK_ULL(63, 32) #define RSU_DCMF2_MASK GENMASK_ULL(31, 0) #define RSU_DCMF3_MASK GENMASK_ULL(63, 32) #define RSU_DCMF0_STATUS_MASK GENMASK_ULL(15, 0) #define RSU_DCMF1_STATUS_MASK GENMASK_ULL(31, 16) #define RSU_DCMF2_STATUS_MASK GENMASK_ULL(47, 32) #define RSU_DCMF3_STATUS_MASK GENMASK_ULL(63, 48) #define RSU_TIMEOUT (msecs_to_jiffies(SVC_RSU_REQUEST_TIMEOUT_MS)) #define INVALID_RETRY_COUNTER 0xFF #define INVALID_DCMF_VERSION 0xFF #define INVALID_DCMF_STATUS 0xFFFFFFFF typedef void (*rsu_callback)(struct stratix10_svc_client *client, struct stratix10_svc_cb_data *data); /** * struct stratix10_rsu_priv - rsu data structure * @chan: pointer to the allocated service channel * @client: active service client * @completion: state for callback completion * @lock: a mutex to protect callback completion state * @status.current_image: address of image currently running in flash * @status.fail_image: address of failed image in flash * @status.version: the interface version number of RSU firmware * @status.state: the state of RSU system * @status.error_details: error code * @status.error_location: the error offset inside the image that failed * @dcmf_version.dcmf0: Quartus dcmf0 version * @dcmf_version.dcmf1: Quartus dcmf1 version * @dcmf_version.dcmf2: Quartus dcmf2 version * @dcmf_version.dcmf3: Quartus dcmf3 version * @dcmf_status.dcmf0: dcmf0 status * @dcmf_status.dcmf1: dcmf1 status * @dcmf_status.dcmf2: dcmf2 status * @dcmf_status.dcmf3: dcmf3 status * @retry_counter: the current image's retry counter * @max_retry: the preset max retry value */ struct stratix10_rsu_priv { struct stratix10_svc_chan *chan; struct stratix10_svc_client client; struct completion completion; struct mutex lock; struct { unsigned long current_image; unsigned long fail_image; unsigned int version; unsigned int state; unsigned int error_details; unsigned int error_location; } status; struct { unsigned int dcmf0; unsigned int dcmf1; unsigned int dcmf2; unsigned int dcmf3; } dcmf_version; struct { unsigned int dcmf0; unsigned int dcmf1; unsigned int dcmf2; unsigned int dcmf3; } dcmf_status; unsigned int retry_counter; unsigned int max_retry; }; /** * rsu_status_callback() - Status callback from Intel Service Layer * @client: pointer to service client * @data: pointer to callback data structure * * Callback from Intel service layer for RSU status request. Status is * only updated after a system reboot, so a get updated status call is * made during driver probe. */ static void rsu_status_callback(struct stratix10_svc_client *client, struct stratix10_svc_cb_data *data) { struct stratix10_rsu_priv *priv = client->priv; struct arm_smccc_res *res = (struct arm_smccc_res *)data->kaddr1; if (data->status == BIT(SVC_STATUS_OK)) { priv->status.version = FIELD_GET(RSU_VERSION_MASK, res->a2); priv->status.state = FIELD_GET(RSU_STATE_MASK, res->a2); priv->status.fail_image = res->a1; priv->status.current_image = res->a0; priv->status.error_location = FIELD_GET(RSU_ERROR_LOCATION_MASK, res->a3); priv->status.error_details = FIELD_GET(RSU_ERROR_DETAIL_MASK, res->a3); } else { dev_err(client->dev, "COMMAND_RSU_STATUS returned 0x%lX\n", res->a0); priv->status.version = 0; priv->status.state = 0; priv->status.fail_image = 0; priv->status.current_image = 0; priv->status.error_location = 0; priv->status.error_details = 0; } complete(&priv->completion); } /** * rsu_command_callback() - Update callback from Intel Service Layer * @client: pointer to client * @data: pointer to callback data structure * * Callback from Intel service layer for RSU commands. */ static void rsu_command_callback(struct stratix10_svc_client *client, struct stratix10_svc_cb_data *data) { struct stratix10_rsu_priv *priv = client->priv; if (data->status == BIT(SVC_STATUS_NO_SUPPORT)) dev_warn(client->dev, "Secure FW doesn't support notify\n"); else if (data->status == BIT(SVC_STATUS_ERROR)) dev_err(client->dev, "Failure, returned status is %lu\n", BIT(data->status)); complete(&priv->completion); } /** * rsu_retry_callback() - Callback from Intel service layer for getting * the current image's retry counter from the firmware * @client: pointer to client * @data: pointer to callback data structure * * Callback from Intel service layer for retry counter, which is used by * user to know how many times the images is still allowed to reload * itself before giving up and starting RSU fail-over flow. */ static void rsu_retry_callback(struct stratix10_svc_client *client, struct stratix10_svc_cb_data *data) { struct stratix10_rsu_priv *priv = client->priv; unsigned int *counter = (unsigned int *)data->kaddr1; if (data->status == BIT(SVC_STATUS_OK)) priv->retry_counter = *counter; else if (data->status == BIT(SVC_STATUS_NO_SUPPORT)) dev_warn(client->dev, "Secure FW doesn't support retry\n"); else dev_err(client->dev, "Failed to get retry counter %lu\n", BIT(data->status)); complete(&priv->completion); } /** * rsu_max_retry_callback() - Callback from Intel service layer for getting * the max retry value from the firmware * @client: pointer to client * @data: pointer to callback data structure * * Callback from Intel service layer for max retry. */ static void rsu_max_retry_callback(struct stratix10_svc_client *client, struct stratix10_svc_cb_data *data) { struct stratix10_rsu_priv *priv = client->priv; unsigned int *max_retry = (unsigned int *)data->kaddr1; if (data->status == BIT(SVC_STATUS_OK)) priv->max_retry = *max_retry; else if (data->status == BIT(SVC_STATUS_NO_SUPPORT)) dev_warn(client->dev, "Secure FW doesn't support max retry\n"); else dev_err(client->dev, "Failed to get max retry %lu\n", BIT(data->status)); complete(&priv->completion); } /** * rsu_dcmf_version_callback() - Callback from Intel service layer for getting * the DCMF version * @client: pointer to client * @data: pointer to callback data structure * * Callback from Intel service layer for DCMF version number */ static void rsu_dcmf_version_callback(struct stratix10_svc_client *client, struct stratix10_svc_cb_data *data) { struct stratix10_rsu_priv *priv = client->priv; unsigned long long *value1 = (unsigned long long *)data->kaddr1; unsigned long long *value2 = (unsigned long long *)data->kaddr2; if (data->status == BIT(SVC_STATUS_OK)) { priv->dcmf_version.dcmf0 = FIELD_GET(RSU_DCMF0_MASK, *value1); priv->dcmf_version.dcmf1 = FIELD_GET(RSU_DCMF1_MASK, *value1); priv->dcmf_version.dcmf2 = FIELD_GET(RSU_DCMF2_MASK, *value2); priv->dcmf_version.dcmf3 = FIELD_GET(RSU_DCMF3_MASK, *value2); } else dev_err(client->dev, "failed to get DCMF version\n"); complete(&priv->completion); } /** * rsu_dcmf_status_callback() - Callback from Intel service layer for getting * the DCMF status * @client: pointer to client * @data: pointer to callback data structure * * Callback from Intel service layer for DCMF status */ static void rsu_dcmf_status_callback(struct stratix10_svc_client *client, struct stratix10_svc_cb_data *data) { struct stratix10_rsu_priv *priv = client->priv; unsigned long long *value = (unsigned long long *)data->kaddr1; if (data->status == BIT(SVC_STATUS_OK)) { priv->dcmf_status.dcmf0 = FIELD_GET(RSU_DCMF0_STATUS_MASK, *value); priv->dcmf_status.dcmf1 = FIELD_GET(RSU_DCMF1_STATUS_MASK, *value); priv->dcmf_status.dcmf2 = FIELD_GET(RSU_DCMF2_STATUS_MASK, *value); priv->dcmf_status.dcmf3 = FIELD_GET(RSU_DCMF3_STATUS_MASK, *value); } else dev_err(client->dev, "failed to get DCMF status\n"); complete(&priv->completion); } /** * rsu_send_msg() - send a message to Intel service layer * @priv: pointer to rsu private data * @command: RSU status or update command * @arg: the request argument, the bitstream address or notify status * @callback: function pointer for the callback (status or update) * * Start an Intel service layer transaction to perform the SMC call that * is necessary to get RSU boot log or set the address of bitstream to * boot after reboot. * * Returns 0 on success or -ETIMEDOUT on error. */ static int rsu_send_msg(struct stratix10_rsu_priv *priv, enum stratix10_svc_command_code command, unsigned long arg, rsu_callback callback) { struct stratix10_svc_client_msg msg; int ret; mutex_lock(&priv->lock); reinit_completion(&priv->completion); priv->client.receive_cb = callback; msg.command = command; if (arg) msg.arg[0] = arg; ret = stratix10_svc_send(priv->chan, &msg); if (ret < 0) goto status_done; ret = wait_for_completion_interruptible_timeout(&priv->completion, RSU_TIMEOUT); if (!ret) { dev_err(priv->client.dev, "timeout waiting for SMC call\n"); ret = -ETIMEDOUT; goto status_done; } else if (ret < 0) { dev_err(priv->client.dev, "error %d waiting for SMC call\n", ret); goto status_done; } else { ret = 0; } status_done: stratix10_svc_done(priv->chan); mutex_unlock(&priv->lock); return ret; } /* * This driver exposes some optional features of the Intel Stratix 10 SoC FPGA. * The sysfs interfaces exposed here are FPGA Remote System Update (RSU) * related. They allow user space software to query the configuration system * status and to request optional reboot behavior specific to Intel FPGAs. */ static ssize_t current_image_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; return sprintf(buf, "0x%08lx\n", priv->status.current_image); } static ssize_t fail_image_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; return sprintf(buf, "0x%08lx\n", priv->status.fail_image); } static ssize_t version_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; return sprintf(buf, "0x%08x\n", priv->status.version); } static ssize_t state_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; return sprintf(buf, "0x%08x\n", priv->status.state); } static ssize_t error_location_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; return sprintf(buf, "0x%08x\n", priv->status.error_location); } static ssize_t error_details_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; return sprintf(buf, "0x%08x\n", priv->status.error_details); } static ssize_t retry_counter_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; return sprintf(buf, "0x%08x\n", priv->retry_counter); } static ssize_t max_retry_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; return scnprintf(buf, sizeof(priv->max_retry), "0x%08x\n", priv->max_retry); } static ssize_t dcmf0_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; return sprintf(buf, "0x%08x\n", priv->dcmf_version.dcmf0); } static ssize_t dcmf1_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; return sprintf(buf, "0x%08x\n", priv->dcmf_version.dcmf1); } static ssize_t dcmf2_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; return sprintf(buf, "0x%08x\n", priv->dcmf_version.dcmf2); } static ssize_t dcmf3_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; return sprintf(buf, "0x%08x\n", priv->dcmf_version.dcmf3); } static ssize_t dcmf0_status_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; if (priv->dcmf_status.dcmf0 == INVALID_DCMF_STATUS) return -EIO; return sprintf(buf, "0x%08x\n", priv->dcmf_status.dcmf0); } static ssize_t dcmf1_status_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; if (priv->dcmf_status.dcmf1 == INVALID_DCMF_STATUS) return -EIO; return sprintf(buf, "0x%08x\n", priv->dcmf_status.dcmf1); } static ssize_t dcmf2_status_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; if (priv->dcmf_status.dcmf2 == INVALID_DCMF_STATUS) return -EIO; return sprintf(buf, "0x%08x\n", priv->dcmf_status.dcmf2); } static ssize_t dcmf3_status_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; if (priv->dcmf_status.dcmf3 == INVALID_DCMF_STATUS) return -EIO; return sprintf(buf, "0x%08x\n", priv->dcmf_status.dcmf3); } static ssize_t reboot_image_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); unsigned long address; int ret; if (!priv) return -ENODEV; ret = kstrtoul(buf, 0, &address); if (ret) return ret; ret = rsu_send_msg(priv, COMMAND_RSU_UPDATE, address, rsu_command_callback); if (ret) { dev_err(dev, "Error, RSU update returned %i\n", ret); return ret; } return count; } static ssize_t notify_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); unsigned long status; int ret; if (!priv) return -ENODEV; ret = kstrtoul(buf, 0, &status); if (ret) return ret; ret = rsu_send_msg(priv, COMMAND_RSU_NOTIFY, status, rsu_command_callback); if (ret) { dev_err(dev, "Error, RSU notify returned %i\n", ret); return ret; } /* to get the updated state */ ret = rsu_send_msg(priv, COMMAND_RSU_STATUS, 0, rsu_status_callback); if (ret) { dev_err(dev, "Error, getting RSU status %i\n", ret); return ret; } ret = rsu_send_msg(priv, COMMAND_RSU_RETRY, 0, rsu_retry_callback); if (ret) { dev_err(dev, "Error, getting RSU retry %i\n", ret); return ret; } return count; } static DEVICE_ATTR_RO(current_image); static DEVICE_ATTR_RO(fail_image); static DEVICE_ATTR_RO(state); static DEVICE_ATTR_RO(version); static DEVICE_ATTR_RO(error_location); static DEVICE_ATTR_RO(error_details); static DEVICE_ATTR_RO(retry_counter); static DEVICE_ATTR_RO(max_retry); static DEVICE_ATTR_RO(dcmf0); static DEVICE_ATTR_RO(dcmf1); static DEVICE_ATTR_RO(dcmf2); static DEVICE_ATTR_RO(dcmf3); static DEVICE_ATTR_RO(dcmf0_status); static DEVICE_ATTR_RO(dcmf1_status); static DEVICE_ATTR_RO(dcmf2_status); static DEVICE_ATTR_RO(dcmf3_status); static DEVICE_ATTR_WO(reboot_image); static DEVICE_ATTR_WO(notify); static struct attribute *rsu_attrs[] = { &dev_attr_current_image.attr, &dev_attr_fail_image.attr, &dev_attr_state.attr, &dev_attr_version.attr, &dev_attr_error_location.attr, &dev_attr_error_details.attr, &dev_attr_retry_counter.attr, &dev_attr_max_retry.attr, &dev_attr_dcmf0.attr, &dev_attr_dcmf1.attr, &dev_attr_dcmf2.attr, &dev_attr_dcmf3.attr, &dev_attr_dcmf0_status.attr, &dev_attr_dcmf1_status.attr, &dev_attr_dcmf2_status.attr, &dev_attr_dcmf3_status.attr, &dev_attr_reboot_image.attr, &dev_attr_notify.attr, NULL }; ATTRIBUTE_GROUPS(rsu); static int stratix10_rsu_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct stratix10_rsu_priv *priv; int ret; priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; priv->client.dev = dev; priv->client.receive_cb = NULL; priv->client.priv = priv; priv->status.current_image = 0; priv->status.fail_image = 0; priv->status.error_location = 0; priv->status.error_details = 0; priv->status.version = 0; priv->status.state = 0; priv->retry_counter = INVALID_RETRY_COUNTER; priv->dcmf_version.dcmf0 = INVALID_DCMF_VERSION; priv->dcmf_version.dcmf1 = INVALID_DCMF_VERSION; priv->dcmf_version.dcmf2 = INVALID_DCMF_VERSION; priv->dcmf_version.dcmf3 = INVALID_DCMF_VERSION; priv->max_retry = INVALID_RETRY_COUNTER; priv->dcmf_status.dcmf0 = INVALID_DCMF_STATUS; priv->dcmf_status.dcmf1 = INVALID_DCMF_STATUS; priv->dcmf_status.dcmf2 = INVALID_DCMF_STATUS; priv->dcmf_status.dcmf3 = INVALID_DCMF_STATUS; mutex_init(&priv->lock); priv->chan = stratix10_svc_request_channel_byname(&priv->client, SVC_CLIENT_RSU); if (IS_ERR(priv->chan)) { dev_err(dev, "couldn't get service channel %s\n", SVC_CLIENT_RSU); return PTR_ERR(priv->chan); } init_completion(&priv->completion); platform_set_drvdata(pdev, priv); /* get the initial state from firmware */ ret = rsu_send_msg(priv, COMMAND_RSU_STATUS, 0, rsu_status_callback); if (ret) { dev_err(dev, "Error, getting RSU status %i\n", ret); stratix10_svc_free_channel(priv->chan); } /* get DCMF version from firmware */ ret = rsu_send_msg(priv, COMMAND_RSU_DCMF_VERSION, 0, rsu_dcmf_version_callback); if (ret) { dev_err(dev, "Error, getting DCMF version %i\n", ret); stratix10_svc_free_channel(priv->chan); } ret = rsu_send_msg(priv, COMMAND_RSU_DCMF_STATUS, 0, rsu_dcmf_status_callback); if (ret) { dev_err(dev, "Error, getting DCMF status %i\n", ret); stratix10_svc_free_channel(priv->chan); } ret = rsu_send_msg(priv, COMMAND_RSU_RETRY, 0, rsu_retry_callback); if (ret) { dev_err(dev, "Error, getting RSU retry %i\n", ret); stratix10_svc_free_channel(priv->chan); } ret = rsu_send_msg(priv, COMMAND_RSU_MAX_RETRY, 0, rsu_max_retry_callback); if (ret) { dev_err(dev, "Error, getting RSU max retry %i\n", ret); stratix10_svc_free_channel(priv->chan); } return ret; } static int stratix10_rsu_remove(struct platform_device *pdev) { struct stratix10_rsu_priv *priv = platform_get_drvdata(pdev); stratix10_svc_free_channel(priv->chan); return 0; } static struct platform_driver stratix10_rsu_driver = { .probe = stratix10_rsu_probe, .remove = stratix10_rsu_remove, .driver = { .name = "stratix10-rsu", .dev_groups = rsu_groups, }, }; module_platform_driver(stratix10_rsu_driver); MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("Intel Remote System Update Driver"); MODULE_AUTHOR("Richard Gong <richard.gong@intel.com>"); |