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 #define INVALID_SPT_ADDRESS 0x0 37 38 #define RSU_GET_SPT_CMD 0x5A 39 #define RSU_GET_SPT_RESP_LEN (4 * sizeof(unsigned int)) 40 41 typedef void (*rsu_callback)(struct stratix10_svc_client *client, 42 struct stratix10_svc_cb_data *data); 43 /** 44 * struct stratix10_rsu_priv - rsu data structure 45 * @chan: pointer to the allocated service channel 46 * @client: active service client 47 * @completion: state for callback completion 48 * @lock: a mutex to protect callback completion state 49 * @status.current_image: address of image currently running in flash 50 * @status.fail_image: address of failed image in flash 51 * @status.version: the interface version number of RSU firmware 52 * @status.state: the state of RSU system 53 * @status.error_details: error code 54 * @status.error_location: the error offset inside the image that failed 55 * @dcmf_version.dcmf0: Quartus dcmf0 version 56 * @dcmf_version.dcmf1: Quartus dcmf1 version 57 * @dcmf_version.dcmf2: Quartus dcmf2 version 58 * @dcmf_version.dcmf3: Quartus dcmf3 version 59 * @dcmf_status.dcmf0: dcmf0 status 60 * @dcmf_status.dcmf1: dcmf1 status 61 * @dcmf_status.dcmf2: dcmf2 status 62 * @dcmf_status.dcmf3: dcmf3 status 63 * @retry_counter: the current image's retry counter 64 * @max_retry: the preset max retry value 65 * @spt0_address: address of spt0 66 * @spt1_address: address of spt1 67 * @get_spt_response_buf: response from sdm for get_spt command 68 */ 69 struct stratix10_rsu_priv { 70 struct stratix10_svc_chan *chan; 71 struct stratix10_svc_client client; 72 struct completion completion; 73 struct mutex lock; 74 struct { 75 unsigned long current_image; 76 unsigned long fail_image; 77 unsigned int version; 78 unsigned int state; 79 unsigned int error_details; 80 unsigned int error_location; 81 } status; 82 83 struct { 84 unsigned int dcmf0; 85 unsigned int dcmf1; 86 unsigned int dcmf2; 87 unsigned int dcmf3; 88 } dcmf_version; 89 90 struct { 91 unsigned int dcmf0; 92 unsigned int dcmf1; 93 unsigned int dcmf2; 94 unsigned int dcmf3; 95 } dcmf_status; 96 97 unsigned int retry_counter; 98 unsigned int max_retry; 99 100 unsigned long spt0_address; 101 unsigned long spt1_address; 102 103 unsigned int *get_spt_response_buf; 104 }; 105 106 /** 107 * rsu_status_callback() - Status callback from Intel Service Layer 108 * @client: pointer to service client 109 * @data: pointer to callback data structure 110 * 111 * Callback from Intel service layer for RSU status request. Status is 112 * only updated after a system reboot, so a get updated status call is 113 * made during driver probe. 114 */ rsu_status_callback(struct stratix10_svc_client * client,struct stratix10_svc_cb_data * data)115 static void rsu_status_callback(struct stratix10_svc_client *client, 116 struct stratix10_svc_cb_data *data) 117 { 118 struct stratix10_rsu_priv *priv = client->priv; 119 struct arm_smccc_res *res = (struct arm_smccc_res *)data->kaddr1; 120 121 if (data->status == BIT(SVC_STATUS_OK)) { 122 priv->status.version = FIELD_GET(RSU_VERSION_MASK, 123 res->a2); 124 priv->status.state = FIELD_GET(RSU_STATE_MASK, res->a2); 125 priv->status.fail_image = res->a1; 126 priv->status.current_image = res->a0; 127 priv->status.error_location = 128 FIELD_GET(RSU_ERROR_LOCATION_MASK, res->a3); 129 priv->status.error_details = 130 FIELD_GET(RSU_ERROR_DETAIL_MASK, res->a3); 131 } else { 132 dev_err(client->dev, "COMMAND_RSU_STATUS returned 0x%lX\n", 133 res->a0); 134 priv->status.version = 0; 135 priv->status.state = 0; 136 priv->status.fail_image = 0; 137 priv->status.current_image = 0; 138 priv->status.error_location = 0; 139 priv->status.error_details = 0; 140 } 141 142 complete(&priv->completion); 143 } 144 145 /** 146 * rsu_command_callback() - Update callback from Intel Service Layer 147 * @client: pointer to client 148 * @data: pointer to callback data structure 149 * 150 * Callback from Intel service layer for RSU commands. 151 */ rsu_command_callback(struct stratix10_svc_client * client,struct stratix10_svc_cb_data * data)152 static void rsu_command_callback(struct stratix10_svc_client *client, 153 struct stratix10_svc_cb_data *data) 154 { 155 struct stratix10_rsu_priv *priv = client->priv; 156 157 if (data->status == BIT(SVC_STATUS_NO_SUPPORT)) 158 dev_warn(client->dev, "Secure FW doesn't support notify\n"); 159 else if (data->status == BIT(SVC_STATUS_ERROR)) 160 dev_err(client->dev, "Failure, returned status is %lu\n", 161 BIT(data->status)); 162 163 complete(&priv->completion); 164 } 165 166 /** 167 * rsu_retry_callback() - Callback from Intel service layer for getting 168 * the current image's retry counter from the firmware 169 * @client: pointer to client 170 * @data: pointer to callback data structure 171 * 172 * Callback from Intel service layer for retry counter, which is used by 173 * user to know how many times the images is still allowed to reload 174 * itself before giving up and starting RSU fail-over flow. 175 */ rsu_retry_callback(struct stratix10_svc_client * client,struct stratix10_svc_cb_data * data)176 static void rsu_retry_callback(struct stratix10_svc_client *client, 177 struct stratix10_svc_cb_data *data) 178 { 179 struct stratix10_rsu_priv *priv = client->priv; 180 unsigned int *counter = (unsigned int *)data->kaddr1; 181 182 if (data->status == BIT(SVC_STATUS_OK)) 183 priv->retry_counter = *counter; 184 else if (data->status == BIT(SVC_STATUS_NO_SUPPORT)) 185 dev_warn(client->dev, "Secure FW doesn't support retry\n"); 186 else 187 dev_err(client->dev, "Failed to get retry counter %lu\n", 188 BIT(data->status)); 189 190 complete(&priv->completion); 191 } 192 193 /** 194 * rsu_max_retry_callback() - Callback from Intel service layer for getting 195 * the max retry value from the firmware 196 * @client: pointer to client 197 * @data: pointer to callback data structure 198 * 199 * Callback from Intel service layer for max retry. 200 */ rsu_max_retry_callback(struct stratix10_svc_client * client,struct stratix10_svc_cb_data * data)201 static void rsu_max_retry_callback(struct stratix10_svc_client *client, 202 struct stratix10_svc_cb_data *data) 203 { 204 struct stratix10_rsu_priv *priv = client->priv; 205 unsigned int *max_retry = (unsigned int *)data->kaddr1; 206 207 if (data->status == BIT(SVC_STATUS_OK)) 208 priv->max_retry = *max_retry; 209 else if (data->status == BIT(SVC_STATUS_NO_SUPPORT)) 210 dev_warn(client->dev, "Secure FW doesn't support max retry\n"); 211 else 212 dev_err(client->dev, "Failed to get max retry %lu\n", 213 BIT(data->status)); 214 215 complete(&priv->completion); 216 } 217 218 /** 219 * rsu_dcmf_version_callback() - Callback from Intel service layer for getting 220 * the DCMF version 221 * @client: pointer to client 222 * @data: pointer to callback data structure 223 * 224 * Callback from Intel service layer for DCMF version number 225 */ rsu_dcmf_version_callback(struct stratix10_svc_client * client,struct stratix10_svc_cb_data * data)226 static void rsu_dcmf_version_callback(struct stratix10_svc_client *client, 227 struct stratix10_svc_cb_data *data) 228 { 229 struct stratix10_rsu_priv *priv = client->priv; 230 unsigned long long *value1 = (unsigned long long *)data->kaddr1; 231 unsigned long long *value2 = (unsigned long long *)data->kaddr2; 232 233 if (data->status == BIT(SVC_STATUS_OK)) { 234 priv->dcmf_version.dcmf0 = FIELD_GET(RSU_DCMF0_MASK, *value1); 235 priv->dcmf_version.dcmf1 = FIELD_GET(RSU_DCMF1_MASK, *value1); 236 priv->dcmf_version.dcmf2 = FIELD_GET(RSU_DCMF2_MASK, *value2); 237 priv->dcmf_version.dcmf3 = FIELD_GET(RSU_DCMF3_MASK, *value2); 238 } else 239 dev_err(client->dev, "failed to get DCMF version\n"); 240 241 complete(&priv->completion); 242 } 243 244 /** 245 * rsu_dcmf_status_callback() - Callback from Intel service layer for getting 246 * the DCMF status 247 * @client: pointer to client 248 * @data: pointer to callback data structure 249 * 250 * Callback from Intel service layer for DCMF status 251 */ rsu_dcmf_status_callback(struct stratix10_svc_client * client,struct stratix10_svc_cb_data * data)252 static void rsu_dcmf_status_callback(struct stratix10_svc_client *client, 253 struct stratix10_svc_cb_data *data) 254 { 255 struct stratix10_rsu_priv *priv = client->priv; 256 unsigned long long *value = (unsigned long long *)data->kaddr1; 257 258 if (data->status == BIT(SVC_STATUS_OK)) { 259 priv->dcmf_status.dcmf0 = FIELD_GET(RSU_DCMF0_STATUS_MASK, 260 *value); 261 priv->dcmf_status.dcmf1 = FIELD_GET(RSU_DCMF1_STATUS_MASK, 262 *value); 263 priv->dcmf_status.dcmf2 = FIELD_GET(RSU_DCMF2_STATUS_MASK, 264 *value); 265 priv->dcmf_status.dcmf3 = FIELD_GET(RSU_DCMF3_STATUS_MASK, 266 *value); 267 } else 268 dev_err(client->dev, "failed to get DCMF status\n"); 269 270 complete(&priv->completion); 271 } 272 rsu_get_spt_callback(struct stratix10_svc_client * client,struct stratix10_svc_cb_data * data)273 static void rsu_get_spt_callback(struct stratix10_svc_client *client, 274 struct stratix10_svc_cb_data *data) 275 { 276 struct stratix10_rsu_priv *priv = client->priv; 277 unsigned long *mbox_err = (unsigned long *)data->kaddr1; 278 unsigned long *resp_len = (unsigned long *)data->kaddr2; 279 280 if (data->status != BIT(SVC_STATUS_OK) || (*mbox_err) || 281 (*resp_len != RSU_GET_SPT_RESP_LEN)) 282 goto error; 283 284 priv->spt0_address = priv->get_spt_response_buf[0]; 285 priv->spt0_address <<= 32; 286 priv->spt0_address |= priv->get_spt_response_buf[1]; 287 288 priv->spt1_address = priv->get_spt_response_buf[2]; 289 priv->spt1_address <<= 32; 290 priv->spt1_address |= priv->get_spt_response_buf[3]; 291 292 goto complete; 293 294 error: 295 dev_err(client->dev, "failed to get SPTs\n"); 296 297 complete: 298 stratix10_svc_free_memory(priv->chan, priv->get_spt_response_buf); 299 priv->get_spt_response_buf = NULL; 300 complete(&priv->completion); 301 } 302 303 /** 304 * rsu_send_msg() - send a message to Intel service layer 305 * @priv: pointer to rsu private data 306 * @command: RSU status or update command 307 * @arg: the request argument, the bitstream address or notify status 308 * @callback: function pointer for the callback (status or update) 309 * 310 * Start an Intel service layer transaction to perform the SMC call that 311 * is necessary to get RSU boot log or set the address of bitstream to 312 * boot after reboot. 313 * 314 * Returns 0 on success or -ETIMEDOUT on error. 315 */ rsu_send_msg(struct stratix10_rsu_priv * priv,enum stratix10_svc_command_code command,unsigned long arg,rsu_callback callback)316 static int rsu_send_msg(struct stratix10_rsu_priv *priv, 317 enum stratix10_svc_command_code command, 318 unsigned long arg, 319 rsu_callback callback) 320 { 321 struct stratix10_svc_client_msg msg; 322 int ret; 323 324 mutex_lock(&priv->lock); 325 reinit_completion(&priv->completion); 326 priv->client.receive_cb = callback; 327 328 msg.command = command; 329 if (arg) 330 msg.arg[0] = arg; 331 332 if (command == COMMAND_MBOX_SEND_CMD) { 333 msg.arg[1] = 0; 334 msg.payload = NULL; 335 msg.payload_length = 0; 336 msg.payload_output = priv->get_spt_response_buf; 337 msg.payload_length_output = RSU_GET_SPT_RESP_LEN; 338 } 339 340 ret = stratix10_svc_send(priv->chan, &msg); 341 if (ret < 0) 342 goto status_done; 343 344 ret = wait_for_completion_interruptible_timeout(&priv->completion, 345 RSU_TIMEOUT); 346 if (!ret) { 347 dev_err(priv->client.dev, 348 "timeout waiting for SMC call\n"); 349 ret = -ETIMEDOUT; 350 goto status_done; 351 } else if (ret < 0) { 352 dev_err(priv->client.dev, 353 "error %d waiting for SMC call\n", ret); 354 goto status_done; 355 } else { 356 ret = 0; 357 } 358 359 status_done: 360 stratix10_svc_done(priv->chan); 361 mutex_unlock(&priv->lock); 362 return ret; 363 } 364 365 /* 366 * This driver exposes some optional features of the Intel Stratix 10 SoC FPGA. 367 * The sysfs interfaces exposed here are FPGA Remote System Update (RSU) 368 * related. They allow user space software to query the configuration system 369 * status and to request optional reboot behavior specific to Intel FPGAs. 370 */ 371 current_image_show(struct device * dev,struct device_attribute * attr,char * buf)372 static ssize_t current_image_show(struct device *dev, 373 struct device_attribute *attr, char *buf) 374 { 375 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); 376 377 if (!priv) 378 return -ENODEV; 379 380 return sprintf(buf, "0x%08lx\n", priv->status.current_image); 381 } 382 fail_image_show(struct device * dev,struct device_attribute * attr,char * buf)383 static ssize_t fail_image_show(struct device *dev, 384 struct device_attribute *attr, char *buf) 385 { 386 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); 387 388 if (!priv) 389 return -ENODEV; 390 391 return sprintf(buf, "0x%08lx\n", priv->status.fail_image); 392 } 393 version_show(struct device * dev,struct device_attribute * attr,char * buf)394 static ssize_t version_show(struct device *dev, struct device_attribute *attr, 395 char *buf) 396 { 397 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); 398 399 if (!priv) 400 return -ENODEV; 401 402 return sprintf(buf, "0x%08x\n", priv->status.version); 403 } 404 state_show(struct device * dev,struct device_attribute * attr,char * buf)405 static ssize_t state_show(struct device *dev, struct device_attribute *attr, 406 char *buf) 407 { 408 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); 409 410 if (!priv) 411 return -ENODEV; 412 413 return sprintf(buf, "0x%08x\n", priv->status.state); 414 } 415 error_location_show(struct device * dev,struct device_attribute * attr,char * buf)416 static ssize_t error_location_show(struct device *dev, 417 struct device_attribute *attr, char *buf) 418 { 419 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); 420 421 if (!priv) 422 return -ENODEV; 423 424 return sprintf(buf, "0x%08x\n", priv->status.error_location); 425 } 426 error_details_show(struct device * dev,struct device_attribute * attr,char * buf)427 static ssize_t error_details_show(struct device *dev, 428 struct device_attribute *attr, char *buf) 429 { 430 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); 431 432 if (!priv) 433 return -ENODEV; 434 435 return sprintf(buf, "0x%08x\n", priv->status.error_details); 436 } 437 retry_counter_show(struct device * dev,struct device_attribute * attr,char * buf)438 static ssize_t retry_counter_show(struct device *dev, 439 struct device_attribute *attr, char *buf) 440 { 441 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); 442 443 if (!priv) 444 return -ENODEV; 445 446 return sprintf(buf, "0x%08x\n", priv->retry_counter); 447 } 448 max_retry_show(struct device * dev,struct device_attribute * attr,char * buf)449 static ssize_t max_retry_show(struct device *dev, 450 struct device_attribute *attr, char *buf) 451 { 452 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); 453 454 if (!priv) 455 return -ENODEV; 456 457 return scnprintf(buf, sizeof(priv->max_retry), 458 "0x%08x\n", priv->max_retry); 459 } 460 dcmf0_show(struct device * dev,struct device_attribute * attr,char * buf)461 static ssize_t dcmf0_show(struct device *dev, 462 struct device_attribute *attr, char *buf) 463 { 464 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); 465 466 if (!priv) 467 return -ENODEV; 468 469 return sprintf(buf, "0x%08x\n", priv->dcmf_version.dcmf0); 470 } 471 dcmf1_show(struct device * dev,struct device_attribute * attr,char * buf)472 static ssize_t dcmf1_show(struct device *dev, 473 struct device_attribute *attr, char *buf) 474 { 475 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); 476 477 if (!priv) 478 return -ENODEV; 479 480 return sprintf(buf, "0x%08x\n", priv->dcmf_version.dcmf1); 481 } 482 dcmf2_show(struct device * dev,struct device_attribute * attr,char * buf)483 static ssize_t dcmf2_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 return sprintf(buf, "0x%08x\n", priv->dcmf_version.dcmf2); 492 } 493 dcmf3_show(struct device * dev,struct device_attribute * attr,char * buf)494 static ssize_t dcmf3_show(struct device *dev, 495 struct device_attribute *attr, char *buf) 496 { 497 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); 498 499 if (!priv) 500 return -ENODEV; 501 502 return sprintf(buf, "0x%08x\n", priv->dcmf_version.dcmf3); 503 } 504 dcmf0_status_show(struct device * dev,struct device_attribute * attr,char * buf)505 static ssize_t dcmf0_status_show(struct device *dev, 506 struct device_attribute *attr, char *buf) 507 { 508 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); 509 510 if (!priv) 511 return -ENODEV; 512 513 if (priv->dcmf_status.dcmf0 == INVALID_DCMF_STATUS) 514 return -EIO; 515 516 return sprintf(buf, "0x%08x\n", priv->dcmf_status.dcmf0); 517 } 518 dcmf1_status_show(struct device * dev,struct device_attribute * attr,char * buf)519 static ssize_t dcmf1_status_show(struct device *dev, 520 struct device_attribute *attr, char *buf) 521 { 522 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); 523 524 if (!priv) 525 return -ENODEV; 526 527 if (priv->dcmf_status.dcmf1 == INVALID_DCMF_STATUS) 528 return -EIO; 529 530 return sprintf(buf, "0x%08x\n", priv->dcmf_status.dcmf1); 531 } 532 dcmf2_status_show(struct device * dev,struct device_attribute * attr,char * buf)533 static ssize_t dcmf2_status_show(struct device *dev, 534 struct device_attribute *attr, char *buf) 535 { 536 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); 537 538 if (!priv) 539 return -ENODEV; 540 541 if (priv->dcmf_status.dcmf2 == INVALID_DCMF_STATUS) 542 return -EIO; 543 544 return sprintf(buf, "0x%08x\n", priv->dcmf_status.dcmf2); 545 } 546 dcmf3_status_show(struct device * dev,struct device_attribute * attr,char * buf)547 static ssize_t dcmf3_status_show(struct device *dev, 548 struct device_attribute *attr, char *buf) 549 { 550 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); 551 552 if (!priv) 553 return -ENODEV; 554 555 if (priv->dcmf_status.dcmf3 == INVALID_DCMF_STATUS) 556 return -EIO; 557 558 return sprintf(buf, "0x%08x\n", priv->dcmf_status.dcmf3); 559 } reboot_image_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)560 static ssize_t reboot_image_store(struct device *dev, 561 struct device_attribute *attr, 562 const char *buf, size_t count) 563 { 564 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); 565 unsigned long address; 566 int ret; 567 568 if (!priv) 569 return -ENODEV; 570 571 ret = kstrtoul(buf, 0, &address); 572 if (ret) 573 return ret; 574 575 ret = rsu_send_msg(priv, COMMAND_RSU_UPDATE, 576 address, rsu_command_callback); 577 if (ret) { 578 dev_err(dev, "Error, RSU update returned %i\n", ret); 579 return ret; 580 } 581 582 return count; 583 } 584 notify_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)585 static ssize_t notify_store(struct device *dev, 586 struct device_attribute *attr, 587 const char *buf, size_t count) 588 { 589 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); 590 unsigned long status; 591 int ret; 592 593 if (!priv) 594 return -ENODEV; 595 596 ret = kstrtoul(buf, 0, &status); 597 if (ret) 598 return ret; 599 600 ret = rsu_send_msg(priv, COMMAND_RSU_NOTIFY, 601 status, rsu_command_callback); 602 if (ret) { 603 dev_err(dev, "Error, RSU notify returned %i\n", ret); 604 return ret; 605 } 606 607 /* to get the updated state */ 608 ret = rsu_send_msg(priv, COMMAND_RSU_STATUS, 609 0, rsu_status_callback); 610 if (ret) { 611 dev_err(dev, "Error, getting RSU status %i\n", ret); 612 return ret; 613 } 614 615 ret = rsu_send_msg(priv, COMMAND_RSU_RETRY, 0, rsu_retry_callback); 616 if (ret) { 617 dev_err(dev, "Error, getting RSU retry %i\n", ret); 618 return ret; 619 } 620 621 return count; 622 } 623 spt0_address_show(struct device * dev,struct device_attribute * attr,char * buf)624 static ssize_t spt0_address_show(struct device *dev, 625 struct device_attribute *attr, char *buf) 626 { 627 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); 628 629 if (!priv) 630 return -ENODEV; 631 632 if (priv->spt0_address == INVALID_SPT_ADDRESS) 633 return -EIO; 634 635 return scnprintf(buf, PAGE_SIZE, "0x%08lx\n", priv->spt0_address); 636 } 637 spt1_address_show(struct device * dev,struct device_attribute * attr,char * buf)638 static ssize_t spt1_address_show(struct device *dev, 639 struct device_attribute *attr, char *buf) 640 { 641 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); 642 643 if (!priv) 644 return -ENODEV; 645 646 if (priv->spt1_address == INVALID_SPT_ADDRESS) 647 return -EIO; 648 649 return scnprintf(buf, PAGE_SIZE, "0x%08lx\n", priv->spt1_address); 650 } 651 652 static DEVICE_ATTR_RO(current_image); 653 static DEVICE_ATTR_RO(fail_image); 654 static DEVICE_ATTR_RO(state); 655 static DEVICE_ATTR_RO(version); 656 static DEVICE_ATTR_RO(error_location); 657 static DEVICE_ATTR_RO(error_details); 658 static DEVICE_ATTR_RO(retry_counter); 659 static DEVICE_ATTR_RO(max_retry); 660 static DEVICE_ATTR_RO(dcmf0); 661 static DEVICE_ATTR_RO(dcmf1); 662 static DEVICE_ATTR_RO(dcmf2); 663 static DEVICE_ATTR_RO(dcmf3); 664 static DEVICE_ATTR_RO(dcmf0_status); 665 static DEVICE_ATTR_RO(dcmf1_status); 666 static DEVICE_ATTR_RO(dcmf2_status); 667 static DEVICE_ATTR_RO(dcmf3_status); 668 static DEVICE_ATTR_WO(reboot_image); 669 static DEVICE_ATTR_WO(notify); 670 static DEVICE_ATTR_RO(spt0_address); 671 static DEVICE_ATTR_RO(spt1_address); 672 673 static struct attribute *rsu_attrs[] = { 674 &dev_attr_current_image.attr, 675 &dev_attr_fail_image.attr, 676 &dev_attr_state.attr, 677 &dev_attr_version.attr, 678 &dev_attr_error_location.attr, 679 &dev_attr_error_details.attr, 680 &dev_attr_retry_counter.attr, 681 &dev_attr_max_retry.attr, 682 &dev_attr_dcmf0.attr, 683 &dev_attr_dcmf1.attr, 684 &dev_attr_dcmf2.attr, 685 &dev_attr_dcmf3.attr, 686 &dev_attr_dcmf0_status.attr, 687 &dev_attr_dcmf1_status.attr, 688 &dev_attr_dcmf2_status.attr, 689 &dev_attr_dcmf3_status.attr, 690 &dev_attr_reboot_image.attr, 691 &dev_attr_notify.attr, 692 &dev_attr_spt0_address.attr, 693 &dev_attr_spt1_address.attr, 694 NULL 695 }; 696 697 ATTRIBUTE_GROUPS(rsu); 698 stratix10_rsu_probe(struct platform_device * pdev)699 static int stratix10_rsu_probe(struct platform_device *pdev) 700 { 701 struct device *dev = &pdev->dev; 702 struct stratix10_rsu_priv *priv; 703 int ret; 704 705 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 706 if (!priv) 707 return -ENOMEM; 708 709 priv->client.dev = dev; 710 priv->client.receive_cb = NULL; 711 priv->client.priv = priv; 712 priv->status.current_image = 0; 713 priv->status.fail_image = 0; 714 priv->status.error_location = 0; 715 priv->status.error_details = 0; 716 priv->status.version = 0; 717 priv->status.state = 0; 718 priv->retry_counter = INVALID_RETRY_COUNTER; 719 priv->dcmf_version.dcmf0 = INVALID_DCMF_VERSION; 720 priv->dcmf_version.dcmf1 = INVALID_DCMF_VERSION; 721 priv->dcmf_version.dcmf2 = INVALID_DCMF_VERSION; 722 priv->dcmf_version.dcmf3 = INVALID_DCMF_VERSION; 723 priv->dcmf_status.dcmf0 = INVALID_DCMF_STATUS; 724 priv->dcmf_status.dcmf1 = INVALID_DCMF_STATUS; 725 priv->dcmf_status.dcmf2 = INVALID_DCMF_STATUS; 726 priv->dcmf_status.dcmf3 = INVALID_DCMF_STATUS; 727 priv->max_retry = INVALID_RETRY_COUNTER; 728 priv->spt0_address = INVALID_SPT_ADDRESS; 729 priv->spt1_address = INVALID_SPT_ADDRESS; 730 731 mutex_init(&priv->lock); 732 priv->chan = stratix10_svc_request_channel_byname(&priv->client, 733 SVC_CLIENT_RSU); 734 if (IS_ERR(priv->chan)) { 735 dev_err(dev, "couldn't get service channel %s\n", 736 SVC_CLIENT_RSU); 737 return PTR_ERR(priv->chan); 738 } 739 740 init_completion(&priv->completion); 741 platform_set_drvdata(pdev, priv); 742 743 /* get the initial state from firmware */ 744 ret = rsu_send_msg(priv, COMMAND_RSU_STATUS, 745 0, rsu_status_callback); 746 if (ret) { 747 dev_err(dev, "Error, getting RSU status %i\n", ret); 748 stratix10_svc_free_channel(priv->chan); 749 } 750 751 /* get DCMF version from firmware */ 752 ret = rsu_send_msg(priv, COMMAND_RSU_DCMF_VERSION, 753 0, rsu_dcmf_version_callback); 754 if (ret) { 755 dev_err(dev, "Error, getting DCMF version %i\n", ret); 756 stratix10_svc_free_channel(priv->chan); 757 } 758 759 ret = rsu_send_msg(priv, COMMAND_RSU_DCMF_STATUS, 760 0, rsu_dcmf_status_callback); 761 if (ret) { 762 dev_err(dev, "Error, getting DCMF status %i\n", ret); 763 stratix10_svc_free_channel(priv->chan); 764 } 765 766 ret = rsu_send_msg(priv, COMMAND_RSU_RETRY, 0, rsu_retry_callback); 767 if (ret) { 768 dev_err(dev, "Error, getting RSU retry %i\n", ret); 769 stratix10_svc_free_channel(priv->chan); 770 } 771 772 ret = rsu_send_msg(priv, COMMAND_RSU_MAX_RETRY, 0, 773 rsu_max_retry_callback); 774 if (ret) { 775 dev_err(dev, "Error, getting RSU max retry %i\n", ret); 776 stratix10_svc_free_channel(priv->chan); 777 } 778 779 priv->get_spt_response_buf = 780 stratix10_svc_allocate_memory(priv->chan, RSU_GET_SPT_RESP_LEN); 781 782 if (IS_ERR(priv->get_spt_response_buf)) { 783 dev_err(dev, "failed to allocate get spt buffer\n"); 784 } else { 785 ret = rsu_send_msg(priv, COMMAND_MBOX_SEND_CMD, 786 RSU_GET_SPT_CMD, rsu_get_spt_callback); 787 if (ret) { 788 dev_err(dev, "Error, getting SPT table %i\n", ret); 789 stratix10_svc_free_channel(priv->chan); 790 } 791 } 792 793 return ret; 794 } 795 stratix10_rsu_remove(struct platform_device * pdev)796 static void stratix10_rsu_remove(struct platform_device *pdev) 797 { 798 struct stratix10_rsu_priv *priv = platform_get_drvdata(pdev); 799 800 stratix10_svc_free_channel(priv->chan); 801 } 802 803 static struct platform_driver stratix10_rsu_driver = { 804 .probe = stratix10_rsu_probe, 805 .remove_new = stratix10_rsu_remove, 806 .driver = { 807 .name = "stratix10-rsu", 808 .dev_groups = rsu_groups, 809 }, 810 }; 811 812 module_platform_driver(stratix10_rsu_driver); 813 814 MODULE_LICENSE("GPL v2"); 815 MODULE_DESCRIPTION("Intel Remote System Update Driver"); 816 MODULE_AUTHOR("Richard Gong <richard.gong@intel.com>"); 817