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