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/of_platform.h>
14 #include <linux/platform_device.h>
15 #include <linux/firmware/intel/stratix10-svc-client.h>
16 #include <linux/string.h>
17 #include <linux/sysfs.h>
18
19 #define RSU_STATE_MASK GENMASK_ULL(31, 0)
20 #define RSU_VERSION_MASK GENMASK_ULL(63, 32)
21 #define RSU_ERROR_LOCATION_MASK GENMASK_ULL(31, 0)
22 #define RSU_ERROR_DETAIL_MASK GENMASK_ULL(63, 32)
23 #define RSU_DCMF0_MASK GENMASK_ULL(31, 0)
24 #define RSU_DCMF1_MASK GENMASK_ULL(63, 32)
25 #define RSU_DCMF2_MASK GENMASK_ULL(31, 0)
26 #define RSU_DCMF3_MASK GENMASK_ULL(63, 32)
27 #define RSU_DCMF0_STATUS_MASK GENMASK_ULL(15, 0)
28 #define RSU_DCMF1_STATUS_MASK GENMASK_ULL(31, 16)
29 #define RSU_DCMF2_STATUS_MASK GENMASK_ULL(47, 32)
30 #define RSU_DCMF3_STATUS_MASK GENMASK_ULL(63, 48)
31
32 #define RSU_TIMEOUT (msecs_to_jiffies(SVC_RSU_REQUEST_TIMEOUT_MS))
33
34 #define INVALID_RETRY_COUNTER 0xFF
35 #define INVALID_DCMF_VERSION 0xFF
36 #define INVALID_DCMF_STATUS 0xFFFFFFFF
37
38 typedef void (*rsu_callback)(struct stratix10_svc_client *client,
39 struct stratix10_svc_cb_data *data);
40 /**
41 * struct stratix10_rsu_priv - rsu data structure
42 * @chan: pointer to the allocated service channel
43 * @client: active service client
44 * @completion: state for callback completion
45 * @lock: a mutex to protect callback completion state
46 * @status.current_image: address of image currently running in flash
47 * @status.fail_image: address of failed image in flash
48 * @status.version: the interface version number of RSU firmware
49 * @status.state: the state of RSU system
50 * @status.error_details: error code
51 * @status.error_location: the error offset inside the image that failed
52 * @dcmf_version.dcmf0: Quartus dcmf0 version
53 * @dcmf_version.dcmf1: Quartus dcmf1 version
54 * @dcmf_version.dcmf2: Quartus dcmf2 version
55 * @dcmf_version.dcmf3: Quartus dcmf3 version
56 * @dcmf_status.dcmf0: dcmf0 status
57 * @dcmf_status.dcmf1: dcmf1 status
58 * @dcmf_status.dcmf2: dcmf2 status
59 * @dcmf_status.dcmf3: dcmf3 status
60 * @retry_counter: the current image's retry counter
61 * @max_retry: the preset max retry value
62 */
63 struct stratix10_rsu_priv {
64 struct stratix10_svc_chan *chan;
65 struct stratix10_svc_client client;
66 struct completion completion;
67 struct mutex lock;
68 struct {
69 unsigned long current_image;
70 unsigned long fail_image;
71 unsigned int version;
72 unsigned int state;
73 unsigned int error_details;
74 unsigned int error_location;
75 } status;
76
77 struct {
78 unsigned int dcmf0;
79 unsigned int dcmf1;
80 unsigned int dcmf2;
81 unsigned int dcmf3;
82 } dcmf_version;
83
84 struct {
85 unsigned int dcmf0;
86 unsigned int dcmf1;
87 unsigned int dcmf2;
88 unsigned int dcmf3;
89 } dcmf_status;
90
91 unsigned int retry_counter;
92 unsigned int max_retry;
93 };
94
95 /**
96 * rsu_status_callback() - Status callback from Intel Service Layer
97 * @client: pointer to service client
98 * @data: pointer to callback data structure
99 *
100 * Callback from Intel service layer for RSU status request. Status is
101 * only updated after a system reboot, so a get updated status call is
102 * made during driver probe.
103 */
rsu_status_callback(struct stratix10_svc_client * client,struct stratix10_svc_cb_data * data)104 static void rsu_status_callback(struct stratix10_svc_client *client,
105 struct stratix10_svc_cb_data *data)
106 {
107 struct stratix10_rsu_priv *priv = client->priv;
108 struct arm_smccc_res *res = (struct arm_smccc_res *)data->kaddr1;
109
110 if (data->status == BIT(SVC_STATUS_OK)) {
111 priv->status.version = FIELD_GET(RSU_VERSION_MASK,
112 res->a2);
113 priv->status.state = FIELD_GET(RSU_STATE_MASK, res->a2);
114 priv->status.fail_image = res->a1;
115 priv->status.current_image = res->a0;
116 priv->status.error_location =
117 FIELD_GET(RSU_ERROR_LOCATION_MASK, res->a3);
118 priv->status.error_details =
119 FIELD_GET(RSU_ERROR_DETAIL_MASK, res->a3);
120 } else {
121 dev_err(client->dev, "COMMAND_RSU_STATUS returned 0x%lX\n",
122 res->a0);
123 priv->status.version = 0;
124 priv->status.state = 0;
125 priv->status.fail_image = 0;
126 priv->status.current_image = 0;
127 priv->status.error_location = 0;
128 priv->status.error_details = 0;
129 }
130
131 complete(&priv->completion);
132 }
133
134 /**
135 * rsu_command_callback() - Update callback from Intel Service Layer
136 * @client: pointer to client
137 * @data: pointer to callback data structure
138 *
139 * Callback from Intel service layer for RSU commands.
140 */
rsu_command_callback(struct stratix10_svc_client * client,struct stratix10_svc_cb_data * data)141 static void rsu_command_callback(struct stratix10_svc_client *client,
142 struct stratix10_svc_cb_data *data)
143 {
144 struct stratix10_rsu_priv *priv = client->priv;
145
146 if (data->status == BIT(SVC_STATUS_NO_SUPPORT))
147 dev_warn(client->dev, "Secure FW doesn't support notify\n");
148 else if (data->status == BIT(SVC_STATUS_ERROR))
149 dev_err(client->dev, "Failure, returned status is %lu\n",
150 BIT(data->status));
151
152 complete(&priv->completion);
153 }
154
155 /**
156 * rsu_retry_callback() - Callback from Intel service layer for getting
157 * the current image's retry counter from the firmware
158 * @client: pointer to client
159 * @data: pointer to callback data structure
160 *
161 * Callback from Intel service layer for retry counter, which is used by
162 * user to know how many times the images is still allowed to reload
163 * itself before giving up and starting RSU fail-over flow.
164 */
rsu_retry_callback(struct stratix10_svc_client * client,struct stratix10_svc_cb_data * data)165 static void rsu_retry_callback(struct stratix10_svc_client *client,
166 struct stratix10_svc_cb_data *data)
167 {
168 struct stratix10_rsu_priv *priv = client->priv;
169 unsigned int *counter = (unsigned int *)data->kaddr1;
170
171 if (data->status == BIT(SVC_STATUS_OK))
172 priv->retry_counter = *counter;
173 else if (data->status == BIT(SVC_STATUS_NO_SUPPORT))
174 dev_warn(client->dev, "Secure FW doesn't support retry\n");
175 else
176 dev_err(client->dev, "Failed to get retry counter %lu\n",
177 BIT(data->status));
178
179 complete(&priv->completion);
180 }
181
182 /**
183 * rsu_max_retry_callback() - Callback from Intel service layer for getting
184 * the max retry value from the firmware
185 * @client: pointer to client
186 * @data: pointer to callback data structure
187 *
188 * Callback from Intel service layer for max retry.
189 */
rsu_max_retry_callback(struct stratix10_svc_client * client,struct stratix10_svc_cb_data * data)190 static void rsu_max_retry_callback(struct stratix10_svc_client *client,
191 struct stratix10_svc_cb_data *data)
192 {
193 struct stratix10_rsu_priv *priv = client->priv;
194 unsigned int *max_retry = (unsigned int *)data->kaddr1;
195
196 if (data->status == BIT(SVC_STATUS_OK))
197 priv->max_retry = *max_retry;
198 else if (data->status == BIT(SVC_STATUS_NO_SUPPORT))
199 dev_warn(client->dev, "Secure FW doesn't support max retry\n");
200 else
201 dev_err(client->dev, "Failed to get max retry %lu\n",
202 BIT(data->status));
203
204 complete(&priv->completion);
205 }
206
207 /**
208 * rsu_dcmf_version_callback() - Callback from Intel service layer for getting
209 * the DCMF version
210 * @client: pointer to client
211 * @data: pointer to callback data structure
212 *
213 * Callback from Intel service layer for DCMF version number
214 */
rsu_dcmf_version_callback(struct stratix10_svc_client * client,struct stratix10_svc_cb_data * data)215 static void rsu_dcmf_version_callback(struct stratix10_svc_client *client,
216 struct stratix10_svc_cb_data *data)
217 {
218 struct stratix10_rsu_priv *priv = client->priv;
219 unsigned long long *value1 = (unsigned long long *)data->kaddr1;
220 unsigned long long *value2 = (unsigned long long *)data->kaddr2;
221
222 if (data->status == BIT(SVC_STATUS_OK)) {
223 priv->dcmf_version.dcmf0 = FIELD_GET(RSU_DCMF0_MASK, *value1);
224 priv->dcmf_version.dcmf1 = FIELD_GET(RSU_DCMF1_MASK, *value1);
225 priv->dcmf_version.dcmf2 = FIELD_GET(RSU_DCMF2_MASK, *value2);
226 priv->dcmf_version.dcmf3 = FIELD_GET(RSU_DCMF3_MASK, *value2);
227 } else
228 dev_err(client->dev, "failed to get DCMF version\n");
229
230 complete(&priv->completion);
231 }
232
233 /**
234 * rsu_dcmf_status_callback() - Callback from Intel service layer for getting
235 * the DCMF status
236 * @client: pointer to client
237 * @data: pointer to callback data structure
238 *
239 * Callback from Intel service layer for DCMF status
240 */
rsu_dcmf_status_callback(struct stratix10_svc_client * client,struct stratix10_svc_cb_data * data)241 static void rsu_dcmf_status_callback(struct stratix10_svc_client *client,
242 struct stratix10_svc_cb_data *data)
243 {
244 struct stratix10_rsu_priv *priv = client->priv;
245 unsigned long long *value = (unsigned long long *)data->kaddr1;
246
247 if (data->status == BIT(SVC_STATUS_OK)) {
248 priv->dcmf_status.dcmf0 = FIELD_GET(RSU_DCMF0_STATUS_MASK,
249 *value);
250 priv->dcmf_status.dcmf1 = FIELD_GET(RSU_DCMF1_STATUS_MASK,
251 *value);
252 priv->dcmf_status.dcmf2 = FIELD_GET(RSU_DCMF2_STATUS_MASK,
253 *value);
254 priv->dcmf_status.dcmf3 = FIELD_GET(RSU_DCMF3_STATUS_MASK,
255 *value);
256 } else
257 dev_err(client->dev, "failed to get DCMF status\n");
258
259 complete(&priv->completion);
260 }
261
262 /**
263 * rsu_send_msg() - send a message to Intel service layer
264 * @priv: pointer to rsu private data
265 * @command: RSU status or update command
266 * @arg: the request argument, the bitstream address or notify status
267 * @callback: function pointer for the callback (status or update)
268 *
269 * Start an Intel service layer transaction to perform the SMC call that
270 * is necessary to get RSU boot log or set the address of bitstream to
271 * boot after reboot.
272 *
273 * Returns 0 on success or -ETIMEDOUT on error.
274 */
rsu_send_msg(struct stratix10_rsu_priv * priv,enum stratix10_svc_command_code command,unsigned long arg,rsu_callback callback)275 static int rsu_send_msg(struct stratix10_rsu_priv *priv,
276 enum stratix10_svc_command_code command,
277 unsigned long arg,
278 rsu_callback callback)
279 {
280 struct stratix10_svc_client_msg msg;
281 int ret;
282
283 mutex_lock(&priv->lock);
284 reinit_completion(&priv->completion);
285 priv->client.receive_cb = callback;
286
287 msg.command = command;
288 if (arg)
289 msg.arg[0] = arg;
290
291 ret = stratix10_svc_send(priv->chan, &msg);
292 if (ret < 0)
293 goto status_done;
294
295 ret = wait_for_completion_interruptible_timeout(&priv->completion,
296 RSU_TIMEOUT);
297 if (!ret) {
298 dev_err(priv->client.dev,
299 "timeout waiting for SMC call\n");
300 ret = -ETIMEDOUT;
301 goto status_done;
302 } else if (ret < 0) {
303 dev_err(priv->client.dev,
304 "error %d waiting for SMC call\n", ret);
305 goto status_done;
306 } else {
307 ret = 0;
308 }
309
310 status_done:
311 stratix10_svc_done(priv->chan);
312 mutex_unlock(&priv->lock);
313 return ret;
314 }
315
316 /*
317 * This driver exposes some optional features of the Intel Stratix 10 SoC FPGA.
318 * The sysfs interfaces exposed here are FPGA Remote System Update (RSU)
319 * related. They allow user space software to query the configuration system
320 * status and to request optional reboot behavior specific to Intel FPGAs.
321 */
322
current_image_show(struct device * dev,struct device_attribute * attr,char * buf)323 static ssize_t current_image_show(struct device *dev,
324 struct device_attribute *attr, char *buf)
325 {
326 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
327
328 if (!priv)
329 return -ENODEV;
330
331 return sprintf(buf, "0x%08lx\n", priv->status.current_image);
332 }
333
fail_image_show(struct device * dev,struct device_attribute * attr,char * buf)334 static ssize_t fail_image_show(struct device *dev,
335 struct device_attribute *attr, char *buf)
336 {
337 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
338
339 if (!priv)
340 return -ENODEV;
341
342 return sprintf(buf, "0x%08lx\n", priv->status.fail_image);
343 }
344
version_show(struct device * dev,struct device_attribute * attr,char * buf)345 static ssize_t version_show(struct device *dev, struct device_attribute *attr,
346 char *buf)
347 {
348 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
349
350 if (!priv)
351 return -ENODEV;
352
353 return sprintf(buf, "0x%08x\n", priv->status.version);
354 }
355
state_show(struct device * dev,struct device_attribute * attr,char * buf)356 static ssize_t state_show(struct device *dev, struct device_attribute *attr,
357 char *buf)
358 {
359 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
360
361 if (!priv)
362 return -ENODEV;
363
364 return sprintf(buf, "0x%08x\n", priv->status.state);
365 }
366
error_location_show(struct device * dev,struct device_attribute * attr,char * buf)367 static ssize_t error_location_show(struct device *dev,
368 struct device_attribute *attr, char *buf)
369 {
370 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
371
372 if (!priv)
373 return -ENODEV;
374
375 return sprintf(buf, "0x%08x\n", priv->status.error_location);
376 }
377
error_details_show(struct device * dev,struct device_attribute * attr,char * buf)378 static ssize_t error_details_show(struct device *dev,
379 struct device_attribute *attr, char *buf)
380 {
381 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
382
383 if (!priv)
384 return -ENODEV;
385
386 return sprintf(buf, "0x%08x\n", priv->status.error_details);
387 }
388
retry_counter_show(struct device * dev,struct device_attribute * attr,char * buf)389 static ssize_t retry_counter_show(struct device *dev,
390 struct device_attribute *attr, char *buf)
391 {
392 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
393
394 if (!priv)
395 return -ENODEV;
396
397 return sprintf(buf, "0x%08x\n", priv->retry_counter);
398 }
399
max_retry_show(struct device * dev,struct device_attribute * attr,char * buf)400 static ssize_t max_retry_show(struct device *dev,
401 struct device_attribute *attr, char *buf)
402 {
403 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
404
405 if (!priv)
406 return -ENODEV;
407
408 return scnprintf(buf, sizeof(priv->max_retry),
409 "0x%08x\n", priv->max_retry);
410 }
411
dcmf0_show(struct device * dev,struct device_attribute * attr,char * buf)412 static ssize_t dcmf0_show(struct device *dev,
413 struct device_attribute *attr, char *buf)
414 {
415 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
416
417 if (!priv)
418 return -ENODEV;
419
420 return sprintf(buf, "0x%08x\n", priv->dcmf_version.dcmf0);
421 }
422
dcmf1_show(struct device * dev,struct device_attribute * attr,char * buf)423 static ssize_t dcmf1_show(struct device *dev,
424 struct device_attribute *attr, char *buf)
425 {
426 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
427
428 if (!priv)
429 return -ENODEV;
430
431 return sprintf(buf, "0x%08x\n", priv->dcmf_version.dcmf1);
432 }
433
dcmf2_show(struct device * dev,struct device_attribute * attr,char * buf)434 static ssize_t dcmf2_show(struct device *dev,
435 struct device_attribute *attr, char *buf)
436 {
437 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
438
439 if (!priv)
440 return -ENODEV;
441
442 return sprintf(buf, "0x%08x\n", priv->dcmf_version.dcmf2);
443 }
444
dcmf3_show(struct device * dev,struct device_attribute * attr,char * buf)445 static ssize_t dcmf3_show(struct device *dev,
446 struct device_attribute *attr, char *buf)
447 {
448 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
449
450 if (!priv)
451 return -ENODEV;
452
453 return sprintf(buf, "0x%08x\n", priv->dcmf_version.dcmf3);
454 }
455
dcmf0_status_show(struct device * dev,struct device_attribute * attr,char * buf)456 static ssize_t dcmf0_status_show(struct device *dev,
457 struct device_attribute *attr, char *buf)
458 {
459 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
460
461 if (!priv)
462 return -ENODEV;
463
464 if (priv->dcmf_status.dcmf0 == INVALID_DCMF_STATUS)
465 return -EIO;
466
467 return sprintf(buf, "0x%08x\n", priv->dcmf_status.dcmf0);
468 }
469
dcmf1_status_show(struct device * dev,struct device_attribute * attr,char * buf)470 static ssize_t dcmf1_status_show(struct device *dev,
471 struct device_attribute *attr, char *buf)
472 {
473 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
474
475 if (!priv)
476 return -ENODEV;
477
478 if (priv->dcmf_status.dcmf1 == INVALID_DCMF_STATUS)
479 return -EIO;
480
481 return sprintf(buf, "0x%08x\n", priv->dcmf_status.dcmf1);
482 }
483
dcmf2_status_show(struct device * dev,struct device_attribute * attr,char * buf)484 static ssize_t dcmf2_status_show(struct device *dev,
485 struct device_attribute *attr, char *buf)
486 {
487 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
488
489 if (!priv)
490 return -ENODEV;
491
492 if (priv->dcmf_status.dcmf2 == INVALID_DCMF_STATUS)
493 return -EIO;
494
495 return sprintf(buf, "0x%08x\n", priv->dcmf_status.dcmf2);
496 }
497
dcmf3_status_show(struct device * dev,struct device_attribute * attr,char * buf)498 static ssize_t dcmf3_status_show(struct device *dev,
499 struct device_attribute *attr, char *buf)
500 {
501 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
502
503 if (!priv)
504 return -ENODEV;
505
506 if (priv->dcmf_status.dcmf3 == INVALID_DCMF_STATUS)
507 return -EIO;
508
509 return sprintf(buf, "0x%08x\n", priv->dcmf_status.dcmf3);
510 }
reboot_image_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)511 static ssize_t reboot_image_store(struct device *dev,
512 struct device_attribute *attr,
513 const char *buf, size_t count)
514 {
515 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
516 unsigned long address;
517 int ret;
518
519 if (!priv)
520 return -ENODEV;
521
522 ret = kstrtoul(buf, 0, &address);
523 if (ret)
524 return ret;
525
526 ret = rsu_send_msg(priv, COMMAND_RSU_UPDATE,
527 address, rsu_command_callback);
528 if (ret) {
529 dev_err(dev, "Error, RSU update returned %i\n", ret);
530 return ret;
531 }
532
533 return count;
534 }
535
notify_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)536 static ssize_t notify_store(struct device *dev,
537 struct device_attribute *attr,
538 const char *buf, size_t count)
539 {
540 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
541 unsigned long status;
542 int ret;
543
544 if (!priv)
545 return -ENODEV;
546
547 ret = kstrtoul(buf, 0, &status);
548 if (ret)
549 return ret;
550
551 ret = rsu_send_msg(priv, COMMAND_RSU_NOTIFY,
552 status, rsu_command_callback);
553 if (ret) {
554 dev_err(dev, "Error, RSU notify returned %i\n", ret);
555 return ret;
556 }
557
558 /* to get the updated state */
559 ret = rsu_send_msg(priv, COMMAND_RSU_STATUS,
560 0, rsu_status_callback);
561 if (ret) {
562 dev_err(dev, "Error, getting RSU status %i\n", ret);
563 return ret;
564 }
565
566 ret = rsu_send_msg(priv, COMMAND_RSU_RETRY, 0, rsu_retry_callback);
567 if (ret) {
568 dev_err(dev, "Error, getting RSU retry %i\n", ret);
569 return ret;
570 }
571
572 return count;
573 }
574
575 static DEVICE_ATTR_RO(current_image);
576 static DEVICE_ATTR_RO(fail_image);
577 static DEVICE_ATTR_RO(state);
578 static DEVICE_ATTR_RO(version);
579 static DEVICE_ATTR_RO(error_location);
580 static DEVICE_ATTR_RO(error_details);
581 static DEVICE_ATTR_RO(retry_counter);
582 static DEVICE_ATTR_RO(max_retry);
583 static DEVICE_ATTR_RO(dcmf0);
584 static DEVICE_ATTR_RO(dcmf1);
585 static DEVICE_ATTR_RO(dcmf2);
586 static DEVICE_ATTR_RO(dcmf3);
587 static DEVICE_ATTR_RO(dcmf0_status);
588 static DEVICE_ATTR_RO(dcmf1_status);
589 static DEVICE_ATTR_RO(dcmf2_status);
590 static DEVICE_ATTR_RO(dcmf3_status);
591 static DEVICE_ATTR_WO(reboot_image);
592 static DEVICE_ATTR_WO(notify);
593
594 static struct attribute *rsu_attrs[] = {
595 &dev_attr_current_image.attr,
596 &dev_attr_fail_image.attr,
597 &dev_attr_state.attr,
598 &dev_attr_version.attr,
599 &dev_attr_error_location.attr,
600 &dev_attr_error_details.attr,
601 &dev_attr_retry_counter.attr,
602 &dev_attr_max_retry.attr,
603 &dev_attr_dcmf0.attr,
604 &dev_attr_dcmf1.attr,
605 &dev_attr_dcmf2.attr,
606 &dev_attr_dcmf3.attr,
607 &dev_attr_dcmf0_status.attr,
608 &dev_attr_dcmf1_status.attr,
609 &dev_attr_dcmf2_status.attr,
610 &dev_attr_dcmf3_status.attr,
611 &dev_attr_reboot_image.attr,
612 &dev_attr_notify.attr,
613 NULL
614 };
615
616 ATTRIBUTE_GROUPS(rsu);
617
stratix10_rsu_probe(struct platform_device * pdev)618 static int stratix10_rsu_probe(struct platform_device *pdev)
619 {
620 struct device *dev = &pdev->dev;
621 struct stratix10_rsu_priv *priv;
622 int ret;
623
624 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
625 if (!priv)
626 return -ENOMEM;
627
628 priv->client.dev = dev;
629 priv->client.receive_cb = NULL;
630 priv->client.priv = priv;
631 priv->status.current_image = 0;
632 priv->status.fail_image = 0;
633 priv->status.error_location = 0;
634 priv->status.error_details = 0;
635 priv->status.version = 0;
636 priv->status.state = 0;
637 priv->retry_counter = INVALID_RETRY_COUNTER;
638 priv->dcmf_version.dcmf0 = INVALID_DCMF_VERSION;
639 priv->dcmf_version.dcmf1 = INVALID_DCMF_VERSION;
640 priv->dcmf_version.dcmf2 = INVALID_DCMF_VERSION;
641 priv->dcmf_version.dcmf3 = INVALID_DCMF_VERSION;
642 priv->max_retry = INVALID_RETRY_COUNTER;
643 priv->dcmf_status.dcmf0 = INVALID_DCMF_STATUS;
644 priv->dcmf_status.dcmf1 = INVALID_DCMF_STATUS;
645 priv->dcmf_status.dcmf2 = INVALID_DCMF_STATUS;
646 priv->dcmf_status.dcmf3 = INVALID_DCMF_STATUS;
647
648 mutex_init(&priv->lock);
649 priv->chan = stratix10_svc_request_channel_byname(&priv->client,
650 SVC_CLIENT_RSU);
651 if (IS_ERR(priv->chan)) {
652 dev_err(dev, "couldn't get service channel %s\n",
653 SVC_CLIENT_RSU);
654 return PTR_ERR(priv->chan);
655 }
656
657 init_completion(&priv->completion);
658 platform_set_drvdata(pdev, priv);
659
660 /* get the initial state from firmware */
661 ret = rsu_send_msg(priv, COMMAND_RSU_STATUS,
662 0, rsu_status_callback);
663 if (ret) {
664 dev_err(dev, "Error, getting RSU status %i\n", ret);
665 stratix10_svc_free_channel(priv->chan);
666 }
667
668 /* get DCMF version from firmware */
669 ret = rsu_send_msg(priv, COMMAND_RSU_DCMF_VERSION,
670 0, rsu_dcmf_version_callback);
671 if (ret) {
672 dev_err(dev, "Error, getting DCMF version %i\n", ret);
673 stratix10_svc_free_channel(priv->chan);
674 }
675
676 ret = rsu_send_msg(priv, COMMAND_RSU_DCMF_STATUS,
677 0, rsu_dcmf_status_callback);
678 if (ret) {
679 dev_err(dev, "Error, getting DCMF status %i\n", ret);
680 stratix10_svc_free_channel(priv->chan);
681 }
682
683 ret = rsu_send_msg(priv, COMMAND_RSU_RETRY, 0, rsu_retry_callback);
684 if (ret) {
685 dev_err(dev, "Error, getting RSU retry %i\n", ret);
686 stratix10_svc_free_channel(priv->chan);
687 }
688
689 ret = rsu_send_msg(priv, COMMAND_RSU_MAX_RETRY, 0,
690 rsu_max_retry_callback);
691 if (ret) {
692 dev_err(dev, "Error, getting RSU max retry %i\n", ret);
693 stratix10_svc_free_channel(priv->chan);
694 }
695
696 return ret;
697 }
698
stratix10_rsu_remove(struct platform_device * pdev)699 static int stratix10_rsu_remove(struct platform_device *pdev)
700 {
701 struct stratix10_rsu_priv *priv = platform_get_drvdata(pdev);
702
703 stratix10_svc_free_channel(priv->chan);
704 return 0;
705 }
706
707 static struct platform_driver stratix10_rsu_driver = {
708 .probe = stratix10_rsu_probe,
709 .remove = stratix10_rsu_remove,
710 .driver = {
711 .name = "stratix10-rsu",
712 .dev_groups = rsu_groups,
713 },
714 };
715
716 module_platform_driver(stratix10_rsu_driver);
717
718 MODULE_LICENSE("GPL v2");
719 MODULE_DESCRIPTION("Intel Remote System Update Driver");
720 MODULE_AUTHOR("Richard Gong <richard.gong@intel.com>");
721
