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 int 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 return 0;
802 }
803
804 static struct platform_driver stratix10_rsu_driver = {
805 .probe = stratix10_rsu_probe,
806 .remove = stratix10_rsu_remove,
807 .driver = {
808 .name = "stratix10-rsu",
809 .dev_groups = rsu_groups,
810 },
811 };
812
813 module_platform_driver(stratix10_rsu_driver);
814
815 MODULE_LICENSE("GPL v2");
816 MODULE_DESCRIPTION("Intel Remote System Update Driver");
817 MODULE_AUTHOR("Richard Gong <richard.gong@intel.com>");
818