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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
41typedef 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 */
69struct 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 */
115static 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 */
152static 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 */
176static 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 */
201static 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 */
226static 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 */
252static 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
273static 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
294error:
295 dev_err(client->dev, "failed to get SPTs\n");
296
297complete:
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 */
316static 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
359status_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
372static 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
383static 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
394static 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
405static 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
416static 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
427static 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
438static 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
449static 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
461static 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
472static 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
483static 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
494static 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
505static 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
519static 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
533static 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
547static 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}
560static 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
585static 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
624static 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
638static 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
652static DEVICE_ATTR_RO(current_image);
653static DEVICE_ATTR_RO(fail_image);
654static DEVICE_ATTR_RO(state);
655static DEVICE_ATTR_RO(version);
656static DEVICE_ATTR_RO(error_location);
657static DEVICE_ATTR_RO(error_details);
658static DEVICE_ATTR_RO(retry_counter);
659static DEVICE_ATTR_RO(max_retry);
660static DEVICE_ATTR_RO(dcmf0);
661static DEVICE_ATTR_RO(dcmf1);
662static DEVICE_ATTR_RO(dcmf2);
663static DEVICE_ATTR_RO(dcmf3);
664static DEVICE_ATTR_RO(dcmf0_status);
665static DEVICE_ATTR_RO(dcmf1_status);
666static DEVICE_ATTR_RO(dcmf2_status);
667static DEVICE_ATTR_RO(dcmf3_status);
668static DEVICE_ATTR_WO(reboot_image);
669static DEVICE_ATTR_WO(notify);
670static DEVICE_ATTR_RO(spt0_address);
671static DEVICE_ATTR_RO(spt1_address);
672
673static 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
697ATTRIBUTE_GROUPS(rsu);
698
699static 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
796static 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
803static 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
812module_platform_driver(stratix10_rsu_driver);
813
814MODULE_LICENSE("GPL v2");
815MODULE_DESCRIPTION("Intel Remote System Update Driver");
816MODULE_AUTHOR("Richard Gong <richard.gong@intel.com>");
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
38typedef 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 */
63struct 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 */
104static 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 */
141static 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 */
165static 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 */
190static 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 */
215static 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 */
241static 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 */
275static 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
310status_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
323static 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
334static 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
345static 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
356static 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
367static 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
378static 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
389static 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
400static 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
412static 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
423static 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
434static 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
445static 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
456static 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
470static 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
484static 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
498static 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}
511static 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
536static 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
575static DEVICE_ATTR_RO(current_image);
576static DEVICE_ATTR_RO(fail_image);
577static DEVICE_ATTR_RO(state);
578static DEVICE_ATTR_RO(version);
579static DEVICE_ATTR_RO(error_location);
580static DEVICE_ATTR_RO(error_details);
581static DEVICE_ATTR_RO(retry_counter);
582static DEVICE_ATTR_RO(max_retry);
583static DEVICE_ATTR_RO(dcmf0);
584static DEVICE_ATTR_RO(dcmf1);
585static DEVICE_ATTR_RO(dcmf2);
586static DEVICE_ATTR_RO(dcmf3);
587static DEVICE_ATTR_RO(dcmf0_status);
588static DEVICE_ATTR_RO(dcmf1_status);
589static DEVICE_ATTR_RO(dcmf2_status);
590static DEVICE_ATTR_RO(dcmf3_status);
591static DEVICE_ATTR_WO(reboot_image);
592static DEVICE_ATTR_WO(notify);
593
594static 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
616ATTRIBUTE_GROUPS(rsu);
617
618static 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
699static 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
707static 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
716module_platform_driver(stratix10_rsu_driver);
717
718MODULE_LICENSE("GPL v2");
719MODULE_DESCRIPTION("Intel Remote System Update Driver");
720MODULE_AUTHOR("Richard Gong <richard.gong@intel.com>");