1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (C) 2018-2019, Intel Corporation
4 * Copyright (C) 2025, Altera Corporation
5 */
6
7 #include <linux/arm-smccc.h>
8 #include <linux/bitfield.h>
9 #include <linux/completion.h>
10 #include <linux/kobject.h>
11 #include <linux/module.h>
12 #include <linux/mutex.h>
13 #include <linux/of.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 #include <linux/delay.h>
19
20 #define RSU_ERASE_SIZE_MASK GENMASK_ULL(63, 32)
21 #define RSU_DCMF0_MASK GENMASK_ULL(31, 0)
22 #define RSU_DCMF1_MASK GENMASK_ULL(63, 32)
23 #define RSU_DCMF2_MASK GENMASK_ULL(31, 0)
24 #define RSU_DCMF3_MASK GENMASK_ULL(63, 32)
25 #define RSU_DCMF0_STATUS_MASK GENMASK_ULL(15, 0)
26 #define RSU_DCMF1_STATUS_MASK GENMASK_ULL(31, 16)
27 #define RSU_DCMF2_STATUS_MASK GENMASK_ULL(47, 32)
28 #define RSU_DCMF3_STATUS_MASK GENMASK_ULL(63, 48)
29
30 #define RSU_TIMEOUT (msecs_to_jiffies(SVC_RSU_REQUEST_TIMEOUT_MS))
31
32 #define INVALID_RETRY_COUNTER 0xFF
33 #define INVALID_DCMF_VERSION 0xFF
34 #define INVALID_DCMF_STATUS 0xFFFFFFFF
35 #define INVALID_SPT_ADDRESS 0x0
36
37 #define RSU_RETRY_SLEEP_MS (1U)
38 #define RSU_ASYNC_MSG_RETRY (3U)
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 */
68 struct stratix10_rsu_priv {
69 struct stratix10_svc_chan *chan;
70 struct stratix10_svc_client client;
71 struct completion completion;
72 struct mutex lock;
73 struct {
74 unsigned long current_image;
75 unsigned long fail_image;
76 unsigned int version;
77 unsigned int state;
78 unsigned int error_details;
79 unsigned int error_location;
80 } status;
81
82 struct {
83 unsigned int dcmf0;
84 unsigned int dcmf1;
85 unsigned int dcmf2;
86 unsigned int dcmf3;
87 } dcmf_version;
88
89 struct {
90 unsigned int dcmf0;
91 unsigned int dcmf1;
92 unsigned int dcmf2;
93 unsigned int dcmf3;
94 } dcmf_status;
95
96 unsigned int retry_counter;
97 unsigned int max_retry;
98
99 unsigned long spt0_address;
100 unsigned long spt1_address;
101 };
102
103 typedef void (*rsu_async_callback)(struct device *dev,
104 struct stratix10_rsu_priv *priv, struct stratix10_svc_cb_data *data);
105
106 /**
107 * rsu_async_status_callback() - Status callback from rsu_async_send()
108 * @dev: pointer to device object
109 * @priv: pointer to priv object
110 * @data: pointer to callback data structure
111 *
112 * Callback from rsu_async_send() to get the system rsu error status.
113 */
rsu_async_status_callback(struct device * dev,struct stratix10_rsu_priv * priv,struct stratix10_svc_cb_data * data)114 static void rsu_async_status_callback(struct device *dev,
115 struct stratix10_rsu_priv *priv,
116 struct stratix10_svc_cb_data *data)
117 {
118 struct arm_smccc_1_2_regs *res = (struct arm_smccc_1_2_regs *)data->kaddr1;
119
120 priv->status.current_image = res->a2;
121 priv->status.fail_image = res->a3;
122 priv->status.state = res->a4;
123 priv->status.version = res->a5;
124 priv->status.error_location = res->a7;
125 priv->status.error_details = res->a8;
126 priv->retry_counter = res->a9;
127 }
128
129 /**
130 * rsu_command_callback() - Update callback from Intel Service Layer
131 * @client: pointer to client
132 * @data: pointer to callback data structure
133 *
134 * Callback from Intel service layer for RSU commands.
135 */
rsu_command_callback(struct stratix10_svc_client * client,struct stratix10_svc_cb_data * data)136 static void rsu_command_callback(struct stratix10_svc_client *client,
137 struct stratix10_svc_cb_data *data)
138 {
139 struct stratix10_rsu_priv *priv = client->priv;
140
141 if (data->status == BIT(SVC_STATUS_NO_SUPPORT))
142 dev_warn(client->dev, "Secure FW doesn't support notify\n");
143 else if (data->status == BIT(SVC_STATUS_ERROR))
144 dev_err(client->dev, "Failure, returned status is %lu\n",
145 BIT(data->status));
146
147 complete(&priv->completion);
148 }
149
150
151 /**
152 * rsu_max_retry_callback() - Callback from Intel service layer for getting
153 * the max retry value from the firmware
154 * @client: pointer to client
155 * @data: pointer to callback data structure
156 *
157 * Callback from Intel service layer for max retry.
158 */
rsu_max_retry_callback(struct stratix10_svc_client * client,struct stratix10_svc_cb_data * data)159 static void rsu_max_retry_callback(struct stratix10_svc_client *client,
160 struct stratix10_svc_cb_data *data)
161 {
162 struct stratix10_rsu_priv *priv = client->priv;
163 unsigned int *max_retry = (unsigned int *)data->kaddr1;
164
165 if (data->status == BIT(SVC_STATUS_OK))
166 priv->max_retry = *max_retry;
167 else if (data->status == BIT(SVC_STATUS_NO_SUPPORT))
168 dev_warn(client->dev, "Secure FW doesn't support max retry\n");
169 else
170 dev_err(client->dev, "Failed to get max retry %lu\n",
171 BIT(data->status));
172
173 complete(&priv->completion);
174 }
175
176 /**
177 * rsu_dcmf_version_callback() - Callback from Intel service layer for getting
178 * the DCMF version
179 * @client: pointer to client
180 * @data: pointer to callback data structure
181 *
182 * Callback from Intel service layer for DCMF version number
183 */
rsu_dcmf_version_callback(struct stratix10_svc_client * client,struct stratix10_svc_cb_data * data)184 static void rsu_dcmf_version_callback(struct stratix10_svc_client *client,
185 struct stratix10_svc_cb_data *data)
186 {
187 struct stratix10_rsu_priv *priv = client->priv;
188 unsigned long long *value1 = (unsigned long long *)data->kaddr1;
189 unsigned long long *value2 = (unsigned long long *)data->kaddr2;
190
191 if (data->status == BIT(SVC_STATUS_OK)) {
192 priv->dcmf_version.dcmf0 = FIELD_GET(RSU_DCMF0_MASK, *value1);
193 priv->dcmf_version.dcmf1 = FIELD_GET(RSU_DCMF1_MASK, *value1);
194 priv->dcmf_version.dcmf2 = FIELD_GET(RSU_DCMF2_MASK, *value2);
195 priv->dcmf_version.dcmf3 = FIELD_GET(RSU_DCMF3_MASK, *value2);
196 } else
197 dev_err(client->dev, "failed to get DCMF version\n");
198
199 complete(&priv->completion);
200 }
201
202 /**
203 * rsu_dcmf_status_callback() - Callback from Intel service layer for getting
204 * the DCMF status
205 * @client: pointer to client
206 * @data: pointer to callback data structure
207 *
208 * Callback from Intel service layer for DCMF status
209 */
rsu_dcmf_status_callback(struct stratix10_svc_client * client,struct stratix10_svc_cb_data * data)210 static void rsu_dcmf_status_callback(struct stratix10_svc_client *client,
211 struct stratix10_svc_cb_data *data)
212 {
213 struct stratix10_rsu_priv *priv = client->priv;
214 unsigned long long *value = (unsigned long long *)data->kaddr1;
215
216 if (data->status == BIT(SVC_STATUS_OK)) {
217 priv->dcmf_status.dcmf0 = FIELD_GET(RSU_DCMF0_STATUS_MASK,
218 *value);
219 priv->dcmf_status.dcmf1 = FIELD_GET(RSU_DCMF1_STATUS_MASK,
220 *value);
221 priv->dcmf_status.dcmf2 = FIELD_GET(RSU_DCMF2_STATUS_MASK,
222 *value);
223 priv->dcmf_status.dcmf3 = FIELD_GET(RSU_DCMF3_STATUS_MASK,
224 *value);
225 } else
226 dev_err(client->dev, "failed to get DCMF status\n");
227
228 complete(&priv->completion);
229 }
230
231 /**
232 * rsu_async_get_spt_table_callback() - Callback to be used by the rsu_async_send()
233 * to retrieve the SPT table information.
234 * @dev: pointer to device object
235 * @priv: pointer to priv object
236 * @data: pointer to callback data structure
237 */
rsu_async_get_spt_table_callback(struct device * dev,struct stratix10_rsu_priv * priv,struct stratix10_svc_cb_data * data)238 static void rsu_async_get_spt_table_callback(struct device *dev,
239 struct stratix10_rsu_priv *priv,
240 struct stratix10_svc_cb_data *data)
241 {
242 priv->spt0_address = *((unsigned long *)data->kaddr1);
243 priv->spt1_address = *((unsigned long *)data->kaddr2);
244 }
245
246 /**
247 * rsu_send_msg() - send a message to Intel service layer
248 * @priv: pointer to rsu private data
249 * @command: RSU status or update command
250 * @arg: the request argument, the bitstream address or notify status
251 * @callback: function pointer for the callback (status or update)
252 *
253 * Start an Intel service layer transaction to perform the SMC call that
254 * is necessary to get RSU boot log or set the address of bitstream to
255 * boot after reboot.
256 *
257 * Returns 0 on success or -ETIMEDOUT on error.
258 */
rsu_send_msg(struct stratix10_rsu_priv * priv,enum stratix10_svc_command_code command,unsigned long arg,rsu_callback callback)259 static int rsu_send_msg(struct stratix10_rsu_priv *priv,
260 enum stratix10_svc_command_code command,
261 unsigned long arg,
262 rsu_callback callback)
263 {
264 struct stratix10_svc_client_msg msg;
265 int ret;
266
267 mutex_lock(&priv->lock);
268 reinit_completion(&priv->completion);
269 priv->client.receive_cb = callback;
270
271 msg.command = command;
272 if (arg)
273 msg.arg[0] = arg;
274
275 ret = stratix10_svc_send(priv->chan, &msg);
276 if (ret < 0)
277 goto status_done;
278
279 ret = wait_for_completion_interruptible_timeout(&priv->completion,
280 RSU_TIMEOUT);
281 if (!ret) {
282 dev_err(priv->client.dev,
283 "timeout waiting for SMC call\n");
284 ret = -ETIMEDOUT;
285 goto status_done;
286 } else if (ret < 0) {
287 dev_err(priv->client.dev,
288 "error %d waiting for SMC call\n", ret);
289 goto status_done;
290 } else {
291 ret = 0;
292 }
293
294 status_done:
295 stratix10_svc_done(priv->chan);
296 mutex_unlock(&priv->lock);
297 return ret;
298 }
299
300 /**
301 * soc64_async_callback() - Callback from Intel service layer for async requests
302 * @ptr: pointer to the completion object
303 */
soc64_async_callback(void * ptr)304 static void soc64_async_callback(void *ptr)
305 {
306 if (ptr)
307 complete(ptr);
308 }
309
310 /**
311 * rsu_send_async_msg() - send an async message to Intel service layer
312 * @dev: pointer to device object
313 * @priv: pointer to rsu private data
314 * @command: RSU status or update command
315 * @arg: the request argument, notify status
316 * @callback: function pointer for the callback (status or update)
317 */
rsu_send_async_msg(struct device * dev,struct stratix10_rsu_priv * priv,enum stratix10_svc_command_code command,unsigned long arg,rsu_async_callback callback)318 static int rsu_send_async_msg(struct device *dev, struct stratix10_rsu_priv *priv,
319 enum stratix10_svc_command_code command,
320 unsigned long arg,
321 rsu_async_callback callback)
322 {
323 struct stratix10_svc_client_msg msg = {0};
324 struct stratix10_svc_cb_data data = {0};
325 struct completion completion;
326 int status, index, ret;
327 void *handle = NULL;
328
329 msg.command = command;
330 msg.arg[0] = arg;
331
332 init_completion(&completion);
333
334 for (index = 0; index < RSU_ASYNC_MSG_RETRY; index++) {
335 status = stratix10_svc_async_send(priv->chan, &msg,
336 &handle, soc64_async_callback,
337 &completion);
338 if (status == 0)
339 break;
340 dev_warn(dev, "Failed to send async message\n");
341 msleep(RSU_RETRY_SLEEP_MS);
342 }
343
344 if (status && !handle) {
345 dev_err(dev, "Failed to send async message\n");
346 return -ETIMEDOUT;
347 }
348
349 ret = wait_for_completion_io_timeout(&completion, RSU_TIMEOUT);
350 if (ret > 0)
351 dev_dbg(dev, "Received async interrupt\n");
352 else if (ret == 0)
353 dev_dbg(dev, "Timeout occurred. Trying to poll the response\n");
354
355 for (index = 0; index < RSU_ASYNC_MSG_RETRY; index++) {
356 status = stratix10_svc_async_poll(priv->chan, handle, &data);
357 if (status == -EAGAIN) {
358 dev_dbg(dev, "Async message is still in progress\n");
359 } else if (status < 0) {
360 dev_alert(dev, "Failed to poll async message\n");
361 ret = -ETIMEDOUT;
362 } else if (status == 0) {
363 ret = 0;
364 break;
365 }
366 msleep(RSU_RETRY_SLEEP_MS);
367 }
368
369 if (ret) {
370 dev_err(dev, "Failed to get async response\n");
371 goto status_done;
372 }
373
374 if (data.status == 0) {
375 ret = 0;
376 if (callback)
377 callback(dev, priv, &data);
378 } else {
379 dev_err(dev, "%s returned 0x%x from SDM\n", __func__,
380 data.status);
381 ret = -EFAULT;
382 }
383
384 status_done:
385 stratix10_svc_async_done(priv->chan, handle);
386 return ret;
387 }
388
389 /*
390 * This driver exposes some optional features of the Intel Stratix 10 SoC FPGA.
391 * The sysfs interfaces exposed here are FPGA Remote System Update (RSU)
392 * related. They allow user space software to query the configuration system
393 * status and to request optional reboot behavior specific to Intel FPGAs.
394 */
395
current_image_show(struct device * dev,struct device_attribute * attr,char * buf)396 static ssize_t current_image_show(struct device *dev,
397 struct device_attribute *attr, char *buf)
398 {
399 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
400
401 if (!priv)
402 return -ENODEV;
403
404 return sprintf(buf, "0x%08lx\n", priv->status.current_image);
405 }
406
fail_image_show(struct device * dev,struct device_attribute * attr,char * buf)407 static ssize_t fail_image_show(struct device *dev,
408 struct device_attribute *attr, char *buf)
409 {
410 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
411
412 if (!priv)
413 return -ENODEV;
414
415 return sprintf(buf, "0x%08lx\n", priv->status.fail_image);
416 }
417
version_show(struct device * dev,struct device_attribute * attr,char * buf)418 static ssize_t version_show(struct device *dev, struct device_attribute *attr,
419 char *buf)
420 {
421 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
422
423 if (!priv)
424 return -ENODEV;
425
426 return sprintf(buf, "0x%08x\n", priv->status.version);
427 }
428
state_show(struct device * dev,struct device_attribute * attr,char * buf)429 static ssize_t state_show(struct device *dev, struct device_attribute *attr,
430 char *buf)
431 {
432 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
433
434 if (!priv)
435 return -ENODEV;
436
437 return sprintf(buf, "0x%08x\n", priv->status.state);
438 }
439
error_location_show(struct device * dev,struct device_attribute * attr,char * buf)440 static ssize_t error_location_show(struct device *dev,
441 struct device_attribute *attr, char *buf)
442 {
443 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
444
445 if (!priv)
446 return -ENODEV;
447
448 return sprintf(buf, "0x%08x\n", priv->status.error_location);
449 }
450
error_details_show(struct device * dev,struct device_attribute * attr,char * buf)451 static ssize_t error_details_show(struct device *dev,
452 struct device_attribute *attr, char *buf)
453 {
454 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
455
456 if (!priv)
457 return -ENODEV;
458
459 return sprintf(buf, "0x%08x\n", priv->status.error_details);
460 }
461
retry_counter_show(struct device * dev,struct device_attribute * attr,char * buf)462 static ssize_t retry_counter_show(struct device *dev,
463 struct device_attribute *attr, char *buf)
464 {
465 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
466
467 if (!priv)
468 return -ENODEV;
469
470 return sprintf(buf, "0x%08x\n", priv->retry_counter);
471 }
472
max_retry_show(struct device * dev,struct device_attribute * attr,char * buf)473 static ssize_t max_retry_show(struct device *dev,
474 struct device_attribute *attr, char *buf)
475 {
476 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
477
478 if (!priv)
479 return -ENODEV;
480
481 return sysfs_emit(buf, "0x%08x\n", priv->max_retry);
482 }
483
dcmf0_show(struct device * dev,struct device_attribute * attr,char * buf)484 static ssize_t dcmf0_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 return sprintf(buf, "0x%08x\n", priv->dcmf_version.dcmf0);
493 }
494
dcmf1_show(struct device * dev,struct device_attribute * attr,char * buf)495 static ssize_t dcmf1_show(struct device *dev,
496 struct device_attribute *attr, char *buf)
497 {
498 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
499
500 if (!priv)
501 return -ENODEV;
502
503 return sprintf(buf, "0x%08x\n", priv->dcmf_version.dcmf1);
504 }
505
dcmf2_show(struct device * dev,struct device_attribute * attr,char * buf)506 static ssize_t dcmf2_show(struct device *dev,
507 struct device_attribute *attr, char *buf)
508 {
509 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
510
511 if (!priv)
512 return -ENODEV;
513
514 return sprintf(buf, "0x%08x\n", priv->dcmf_version.dcmf2);
515 }
516
dcmf3_show(struct device * dev,struct device_attribute * attr,char * buf)517 static ssize_t dcmf3_show(struct device *dev,
518 struct device_attribute *attr, char *buf)
519 {
520 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
521
522 if (!priv)
523 return -ENODEV;
524
525 return sprintf(buf, "0x%08x\n", priv->dcmf_version.dcmf3);
526 }
527
dcmf0_status_show(struct device * dev,struct device_attribute * attr,char * buf)528 static ssize_t dcmf0_status_show(struct device *dev,
529 struct device_attribute *attr, char *buf)
530 {
531 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
532
533 if (!priv)
534 return -ENODEV;
535
536 if (priv->dcmf_status.dcmf0 == INVALID_DCMF_STATUS)
537 return -EIO;
538
539 return sprintf(buf, "0x%08x\n", priv->dcmf_status.dcmf0);
540 }
541
dcmf1_status_show(struct device * dev,struct device_attribute * attr,char * buf)542 static ssize_t dcmf1_status_show(struct device *dev,
543 struct device_attribute *attr, char *buf)
544 {
545 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
546
547 if (!priv)
548 return -ENODEV;
549
550 if (priv->dcmf_status.dcmf1 == INVALID_DCMF_STATUS)
551 return -EIO;
552
553 return sprintf(buf, "0x%08x\n", priv->dcmf_status.dcmf1);
554 }
555
dcmf2_status_show(struct device * dev,struct device_attribute * attr,char * buf)556 static ssize_t dcmf2_status_show(struct device *dev,
557 struct device_attribute *attr, char *buf)
558 {
559 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
560
561 if (!priv)
562 return -ENODEV;
563
564 if (priv->dcmf_status.dcmf2 == INVALID_DCMF_STATUS)
565 return -EIO;
566
567 return sprintf(buf, "0x%08x\n", priv->dcmf_status.dcmf2);
568 }
569
dcmf3_status_show(struct device * dev,struct device_attribute * attr,char * buf)570 static ssize_t dcmf3_status_show(struct device *dev,
571 struct device_attribute *attr, char *buf)
572 {
573 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
574
575 if (!priv)
576 return -ENODEV;
577
578 if (priv->dcmf_status.dcmf3 == INVALID_DCMF_STATUS)
579 return -EIO;
580
581 return sprintf(buf, "0x%08x\n", priv->dcmf_status.dcmf3);
582 }
reboot_image_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)583 static ssize_t reboot_image_store(struct device *dev,
584 struct device_attribute *attr,
585 const char *buf, size_t count)
586 {
587 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
588 unsigned long address;
589 int ret;
590
591 if (!priv)
592 return -ENODEV;
593
594 ret = kstrtoul(buf, 0, &address);
595 if (ret)
596 return ret;
597
598 ret = rsu_send_msg(priv, COMMAND_RSU_UPDATE,
599 address, rsu_command_callback);
600 if (ret) {
601 dev_err(dev, "Error, RSU update returned %i\n", ret);
602 return ret;
603 }
604
605 return count;
606 }
607
notify_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)608 static ssize_t notify_store(struct device *dev,
609 struct device_attribute *attr,
610 const char *buf, size_t count)
611 {
612 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
613 unsigned long status;
614 int ret;
615
616 if (!priv)
617 return -ENODEV;
618
619 ret = kstrtoul(buf, 0, &status);
620 if (ret)
621 return ret;
622
623 ret = rsu_send_async_msg(dev, priv, COMMAND_RSU_NOTIFY, status, NULL);
624 if (ret) {
625 dev_err(dev, "Error, RSU notify returned %i\n", ret);
626 return ret;
627 }
628
629 /* to get the updated state */
630 ret = rsu_send_async_msg(dev, priv, COMMAND_RSU_STATUS, 0,
631 rsu_async_status_callback);
632 if (ret) {
633 dev_err(dev, "Error, getting RSU status %i\n", ret);
634 return ret;
635 }
636
637 return count;
638 }
639
spt0_address_show(struct device * dev,struct device_attribute * attr,char * buf)640 static ssize_t spt0_address_show(struct device *dev,
641 struct device_attribute *attr, char *buf)
642 {
643 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
644
645 if (!priv)
646 return -ENODEV;
647
648 if (priv->spt0_address == INVALID_SPT_ADDRESS)
649 return -EIO;
650
651 return sysfs_emit(buf, "0x%08lx\n", priv->spt0_address);
652 }
653
spt1_address_show(struct device * dev,struct device_attribute * attr,char * buf)654 static ssize_t spt1_address_show(struct device *dev,
655 struct device_attribute *attr, char *buf)
656 {
657 struct stratix10_rsu_priv *priv = dev_get_drvdata(dev);
658
659 if (!priv)
660 return -ENODEV;
661
662 if (priv->spt1_address == INVALID_SPT_ADDRESS)
663 return -EIO;
664
665 return sysfs_emit(buf, "0x%08lx\n", priv->spt1_address);
666 }
667
668 static DEVICE_ATTR_RO(current_image);
669 static DEVICE_ATTR_RO(fail_image);
670 static DEVICE_ATTR_RO(state);
671 static DEVICE_ATTR_RO(version);
672 static DEVICE_ATTR_RO(error_location);
673 static DEVICE_ATTR_RO(error_details);
674 static DEVICE_ATTR_RO(retry_counter);
675 static DEVICE_ATTR_RO(max_retry);
676 static DEVICE_ATTR_RO(dcmf0);
677 static DEVICE_ATTR_RO(dcmf1);
678 static DEVICE_ATTR_RO(dcmf2);
679 static DEVICE_ATTR_RO(dcmf3);
680 static DEVICE_ATTR_RO(dcmf0_status);
681 static DEVICE_ATTR_RO(dcmf1_status);
682 static DEVICE_ATTR_RO(dcmf2_status);
683 static DEVICE_ATTR_RO(dcmf3_status);
684 static DEVICE_ATTR_WO(reboot_image);
685 static DEVICE_ATTR_WO(notify);
686 static DEVICE_ATTR_RO(spt0_address);
687 static DEVICE_ATTR_RO(spt1_address);
688
689 static struct attribute *rsu_attrs[] = {
690 &dev_attr_current_image.attr,
691 &dev_attr_fail_image.attr,
692 &dev_attr_state.attr,
693 &dev_attr_version.attr,
694 &dev_attr_error_location.attr,
695 &dev_attr_error_details.attr,
696 &dev_attr_retry_counter.attr,
697 &dev_attr_max_retry.attr,
698 &dev_attr_dcmf0.attr,
699 &dev_attr_dcmf1.attr,
700 &dev_attr_dcmf2.attr,
701 &dev_attr_dcmf3.attr,
702 &dev_attr_dcmf0_status.attr,
703 &dev_attr_dcmf1_status.attr,
704 &dev_attr_dcmf2_status.attr,
705 &dev_attr_dcmf3_status.attr,
706 &dev_attr_reboot_image.attr,
707 &dev_attr_notify.attr,
708 &dev_attr_spt0_address.attr,
709 &dev_attr_spt1_address.attr,
710 NULL
711 };
712
713 ATTRIBUTE_GROUPS(rsu);
714
stratix10_rsu_probe(struct platform_device * pdev)715 static int stratix10_rsu_probe(struct platform_device *pdev)
716 {
717 struct device *dev = &pdev->dev;
718 struct stratix10_rsu_priv *priv;
719 int ret;
720
721 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
722 if (!priv)
723 return -ENOMEM;
724
725 priv->client.dev = dev;
726 priv->client.receive_cb = NULL;
727 priv->client.priv = priv;
728 priv->status.current_image = 0;
729 priv->status.fail_image = 0;
730 priv->status.error_location = 0;
731 priv->status.error_details = 0;
732 priv->status.version = 0;
733 priv->status.state = 0;
734 priv->retry_counter = INVALID_RETRY_COUNTER;
735 priv->dcmf_version.dcmf0 = INVALID_DCMF_VERSION;
736 priv->dcmf_version.dcmf1 = INVALID_DCMF_VERSION;
737 priv->dcmf_version.dcmf2 = INVALID_DCMF_VERSION;
738 priv->dcmf_version.dcmf3 = INVALID_DCMF_VERSION;
739 priv->dcmf_status.dcmf0 = INVALID_DCMF_STATUS;
740 priv->dcmf_status.dcmf1 = INVALID_DCMF_STATUS;
741 priv->dcmf_status.dcmf2 = INVALID_DCMF_STATUS;
742 priv->dcmf_status.dcmf3 = INVALID_DCMF_STATUS;
743 priv->max_retry = INVALID_RETRY_COUNTER;
744 priv->spt0_address = INVALID_SPT_ADDRESS;
745 priv->spt1_address = INVALID_SPT_ADDRESS;
746
747 mutex_init(&priv->lock);
748 priv->chan = stratix10_svc_request_channel_byname(&priv->client,
749 SVC_CLIENT_RSU);
750 if (IS_ERR(priv->chan)) {
751 dev_err(dev, "couldn't get service channel %s\n",
752 SVC_CLIENT_RSU);
753 return PTR_ERR(priv->chan);
754 }
755
756 ret = stratix10_svc_add_async_client(priv->chan, false);
757 if (ret) {
758 dev_err(dev, "failed to add async client\n");
759 stratix10_svc_free_channel(priv->chan);
760 return ret;
761 }
762
763 init_completion(&priv->completion);
764 platform_set_drvdata(pdev, priv);
765
766 /* get the initial state from firmware */
767 ret = rsu_send_async_msg(dev, priv, COMMAND_RSU_STATUS, 0,
768 rsu_async_status_callback);
769 if (ret) {
770 dev_err(dev, "Error, getting RSU status %i\n", ret);
771 stratix10_svc_free_channel(priv->chan);
772 }
773
774 /* get DCMF version from firmware */
775 ret = rsu_send_msg(priv, COMMAND_RSU_DCMF_VERSION,
776 0, rsu_dcmf_version_callback);
777 if (ret) {
778 dev_err(dev, "Error, getting DCMF version %i\n", ret);
779 stratix10_svc_free_channel(priv->chan);
780 }
781
782 ret = rsu_send_msg(priv, COMMAND_RSU_DCMF_STATUS,
783 0, rsu_dcmf_status_callback);
784 if (ret) {
785 dev_err(dev, "Error, getting DCMF status %i\n", ret);
786 stratix10_svc_free_channel(priv->chan);
787 }
788
789 ret = rsu_send_msg(priv, COMMAND_RSU_MAX_RETRY, 0,
790 rsu_max_retry_callback);
791 if (ret) {
792 dev_err(dev, "Error, getting RSU max retry %i\n", ret);
793 stratix10_svc_free_channel(priv->chan);
794 }
795
796
797 ret = rsu_send_async_msg(dev, priv, COMMAND_RSU_GET_SPT_TABLE, 0,
798 rsu_async_get_spt_table_callback);
799 if (ret) {
800 dev_err(dev, "Error, getting SPT table %i\n", ret);
801 stratix10_svc_free_channel(priv->chan);
802 }
803
804 return ret;
805 }
806
stratix10_rsu_remove(struct platform_device * pdev)807 static void stratix10_rsu_remove(struct platform_device *pdev)
808 {
809 struct stratix10_rsu_priv *priv = platform_get_drvdata(pdev);
810
811 stratix10_svc_free_channel(priv->chan);
812 }
813
814 static struct platform_driver stratix10_rsu_driver = {
815 .probe = stratix10_rsu_probe,
816 .remove = stratix10_rsu_remove,
817 .driver = {
818 .name = "stratix10-rsu",
819 .dev_groups = rsu_groups,
820 },
821 };
822
823 module_platform_driver(stratix10_rsu_driver);
824
825 MODULE_LICENSE("GPL v2");
826 MODULE_DESCRIPTION("Intel Remote System Update Driver");
827 MODULE_AUTHOR("Richard Gong <richard.gong@intel.com>");
828