-
Notifications
You must be signed in to change notification settings - Fork 102
/
stratix10-svc.c
1298 lines (1163 loc) · 36 KB
/
stratix10-svc.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2017-2018, Intel Corporation
*/
#include <linux/completion.h>
#include <linux/delay.h>
#include <linux/genalloc.h>
#include <linux/io.h>
#include <linux/kfifo.h>
#include <linux/kthread.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/firmware/intel/stratix10-smc.h>
#include <linux/firmware/intel/stratix10-svc-client.h>
#include <linux/types.h>
/**
* SVC_NUM_DATA_IN_FIFO - number of struct stratix10_svc_data in the FIFO
*
* SVC_NUM_CHANNEL - number of channel supported by service layer driver
*
* FPGA_CONFIG_DATA_CLAIM_TIMEOUT_MS - claim back the submitted buffer(s)
* from the secure world for FPGA manager to reuse, or to free the buffer(s)
* when all bit-stream data had be send.
*
* FPGA_CONFIG_STATUS_TIMEOUT_SEC - poll the FPGA configuration status,
* service layer will return error to FPGA manager when timeout occurs,
* timeout is set to 30 seconds (30 * 1000) at Intel Stratix10 SoC.
*/
#define SVC_NUM_DATA_IN_FIFO 32
#define SVC_NUM_CHANNEL 3
#define FPGA_CONFIG_DATA_CLAIM_TIMEOUT_MS 200
#define FPGA_CONFIG_STATUS_TIMEOUT_SEC 30
/* stratix10 service layer clients */
#define STRATIX10_RSU "stratix10-rsu"
#define INTEL_FCS "intel-fcs"
typedef void (svc_invoke_fn)(unsigned long, unsigned long, unsigned long,
unsigned long, unsigned long, unsigned long,
unsigned long, unsigned long,
struct arm_smccc_res *);
struct stratix10_svc_chan;
/**
* struct stratix10_svc - svc private data
* @stratix10_svc_rsu: pointer to stratix10 RSU device
*/
struct stratix10_svc {
struct platform_device *stratix10_svc_rsu;
struct platform_device *intel_svc_fcs;
};
/**
* struct stratix10_svc_sh_memory - service shared memory structure
* @sync_complete: state for a completion
* @addr: physical address of shared memory block
* @size: size of shared memory block
* @invoke_fn: function to issue secure monitor or hypervisor call
*
* This struct is used to save physical address and size of shared memory
* block. The shared memory blocked is allocated by secure monitor software
* at secure world.
*
* Service layer driver uses the physical address and size to create a memory
* pool, then allocates data buffer from that memory pool for service client.
*/
struct stratix10_svc_sh_memory {
struct completion sync_complete;
unsigned long addr;
unsigned long size;
svc_invoke_fn *invoke_fn;
};
/**
* struct stratix10_svc_data_mem - service memory structure
* @vaddr: virtual address
* @paddr: physical address
* @size: size of memory
* @node: link list head node
*
* This struct is used in a list that keeps track of buffers which have
* been allocated or freed from the memory pool. Service layer driver also
* uses this struct to transfer physical address to virtual address.
*/
struct stratix10_svc_data_mem {
void *vaddr;
phys_addr_t paddr;
size_t size;
struct list_head node;
};
/**
* struct stratix10_svc_data - service data structure
* @chan: service channel
* @paddr: physical address of to be processed payload
* @size: to be processed playload size
* @paddr_output: physical address of processed payload
* @size_output: processed payload size
* @command: service command requested by client
* @flag: configuration type (full or partial)
* @arg: args to be passed via registers and not physically mapped buffers
*
* This struct is used in service FIFO for inter-process communication.
*/
struct stratix10_svc_data {
struct stratix10_svc_chan *chan;
phys_addr_t paddr;
size_t size;
phys_addr_t paddr_output;
size_t size_output;
u32 command;
u32 flag;
u64 arg[3];
};
/**
* struct stratix10_svc_controller - service controller
* @dev: device
* @chans: array of service channels
* @num_chans: number of channels in 'chans' array
* @num_active_client: number of active service client
* @node: list management
* @genpool: memory pool pointing to the memory region
* @task: pointer to the thread task which handles SMC or HVC call
* @svc_fifo: a queue for storing service message data
* @complete_status: state for completion
* @svc_fifo_lock: protect access to service message data queue
* @invoke_fn: function to issue secure monitor call or hypervisor call
*
* This struct is used to create communication channels for service clients, to
* handle secure monitor or hypervisor call.
*/
struct stratix10_svc_controller {
struct device *dev;
struct stratix10_svc_chan *chans;
int num_chans;
int num_active_client;
struct list_head node;
struct gen_pool *genpool;
struct task_struct *task;
struct kfifo svc_fifo;
struct completion complete_status;
spinlock_t svc_fifo_lock;
svc_invoke_fn *invoke_fn;
};
/**
* struct stratix10_svc_chan - service communication channel
* @ctrl: pointer to service controller which is the provider of this channel
* @scl: pointer to service client which owns the channel
* @name: service client name associated with the channel
* @lock: protect access to the channel
*
* This struct is used by service client to communicate with service layer, each
* service client has its own channel created by service controller.
*/
struct stratix10_svc_chan {
struct stratix10_svc_controller *ctrl;
struct stratix10_svc_client *scl;
char *name;
spinlock_t lock;
};
static LIST_HEAD(svc_ctrl);
static LIST_HEAD(svc_data_mem);
/**
* svc_pa_to_va() - translate physical address to virtual address
* @addr: to be translated physical address
*
* Return: valid virtual address or NULL if the provided physical
* address doesn't exist.
*/
static void *svc_pa_to_va(unsigned long addr)
{
struct stratix10_svc_data_mem *pmem;
pr_debug("claim back P-addr=0x%016x\n", (unsigned int)addr);
list_for_each_entry(pmem, &svc_data_mem, node)
if (pmem->paddr == addr)
return pmem->vaddr;
/* physical address is not found */
return NULL;
}
/**
* svc_thread_cmd_data_claim() - claim back buffer from the secure world
* @ctrl: pointer to service layer controller
* @p_data: pointer to service data structure
* @cb_data: pointer to callback data structure to service client
*
* Claim back the submitted buffers from the secure world and pass buffer
* back to service client (FPGA manager, etc) for reuse.
*/
static void svc_thread_cmd_data_claim(struct stratix10_svc_controller *ctrl,
struct stratix10_svc_data *p_data,
struct stratix10_svc_cb_data *cb_data)
{
struct arm_smccc_res res;
unsigned long timeout;
reinit_completion(&ctrl->complete_status);
timeout = msecs_to_jiffies(FPGA_CONFIG_DATA_CLAIM_TIMEOUT_MS);
pr_debug("%s: claim back the submitted buffer\n", __func__);
do {
ctrl->invoke_fn(INTEL_SIP_SMC_FPGA_CONFIG_COMPLETED_WRITE,
0, 0, 0, 0, 0, 0, 0, &res);
if (res.a0 == INTEL_SIP_SMC_STATUS_OK) {
if (!res.a1) {
complete(&ctrl->complete_status);
break;
}
cb_data->status = BIT(SVC_STATUS_BUFFER_DONE);
cb_data->kaddr1 = svc_pa_to_va(res.a1);
cb_data->kaddr2 = (res.a2) ?
svc_pa_to_va(res.a2) : NULL;
cb_data->kaddr3 = (res.a3) ?
svc_pa_to_va(res.a3) : NULL;
p_data->chan->scl->receive_cb(p_data->chan->scl,
cb_data);
} else {
pr_debug("%s: secure world busy, polling again\n",
__func__);
}
} while (res.a0 == INTEL_SIP_SMC_STATUS_OK ||
res.a0 == INTEL_SIP_SMC_STATUS_BUSY ||
wait_for_completion_timeout(&ctrl->complete_status, timeout));
}
/**
* svc_thread_cmd_config_status() - check configuration status
* @ctrl: pointer to service layer controller
* @p_data: pointer to service data structure
* @cb_data: pointer to callback data structure to service client
*
* Check whether the secure firmware at secure world has finished the FPGA
* configuration, and then inform FPGA manager the configuration status.
*/
static void svc_thread_cmd_config_status(struct stratix10_svc_controller *ctrl,
struct stratix10_svc_data *p_data,
struct stratix10_svc_cb_data *cb_data)
{
struct arm_smccc_res res;
int count_in_sec;
unsigned long a0, a1, a2;
cb_data->kaddr1 = NULL;
cb_data->kaddr2 = NULL;
cb_data->kaddr3 = NULL;
cb_data->status = BIT(SVC_STATUS_ERROR);
pr_debug("%s: polling config status\n", __func__);
a0 = INTEL_SIP_SMC_FPGA_CONFIG_ISDONE;
a1 = (unsigned long)p_data->paddr;
a2 = (unsigned long)p_data->size;
if (p_data->command == COMMAND_POLL_SERVICE_STATUS)
a0 = INTEL_SIP_SMC_SERVICE_COMPLETED;
count_in_sec = FPGA_CONFIG_STATUS_TIMEOUT_SEC;
while (count_in_sec) {
ctrl->invoke_fn(a0, a1, a2, 0, 0, 0, 0, 0, &res);
if ((res.a0 == INTEL_SIP_SMC_STATUS_OK) ||
(res.a0 == INTEL_SIP_SMC_STATUS_ERROR) ||
(res.a0 == INTEL_SIP_SMC_STATUS_REJECTED))
break;
/*
* request is still in progress, wait one second then
* poll again
*/
msleep(1000);
count_in_sec--;
}
if (!count_in_sec) {
pr_err("%s: poll status timeout\n", __func__);
cb_data->status = BIT(SVC_STATUS_BUSY);
} else if (res.a0 == INTEL_SIP_SMC_STATUS_OK) {
cb_data->status = BIT(SVC_STATUS_COMPLETED);
cb_data->kaddr2 = (res.a2) ?
svc_pa_to_va(res.a2) : NULL;
cb_data->kaddr3 = (res.a3) ? &res.a3 : NULL;
} else {
pr_err("%s: poll status error\n", __func__);
cb_data->kaddr1 = &res.a1;
cb_data->kaddr2 = (res.a2) ?
svc_pa_to_va(res.a2) : NULL;
cb_data->kaddr3 = (res.a3) ? &res.a3 : NULL;
cb_data->status = BIT(SVC_STATUS_ERROR);
}
p_data->chan->scl->receive_cb(p_data->chan->scl, cb_data);
}
/**
* svc_thread_recv_status_ok() - handle the successful status
* @p_data: pointer to service data structure
* @cb_data: pointer to callback data structure to service client
* @res: result from SMC or HVC call
*
* Send back the correspond status to the service clients.
*/
static void svc_thread_recv_status_ok(struct stratix10_svc_data *p_data,
struct stratix10_svc_cb_data *cb_data,
struct arm_smccc_res res)
{
cb_data->kaddr1 = NULL;
cb_data->kaddr2 = NULL;
cb_data->kaddr3 = NULL;
switch (p_data->command) {
case COMMAND_RECONFIG:
case COMMAND_RSU_UPDATE:
case COMMAND_RSU_NOTIFY:
case COMMAND_FCS_REQUEST_SERVICE:
case COMMAND_FCS_SEND_CERTIFICATE:
case COMMAND_FCS_DATA_ENCRYPTION:
case COMMAND_FCS_DATA_DECRYPTION:
cb_data->status = BIT(SVC_STATUS_OK);
break;
case COMMAND_RECONFIG_DATA_SUBMIT:
cb_data->status = BIT(SVC_STATUS_BUFFER_SUBMITTED);
break;
case COMMAND_RECONFIG_STATUS:
cb_data->status = BIT(SVC_STATUS_COMPLETED);
break;
case COMMAND_RSU_RETRY:
case COMMAND_RSU_MAX_RETRY:
case COMMAND_RSU_DCMF_STATUS:
case COMMAND_FIRMWARE_VERSION:
cb_data->status = BIT(SVC_STATUS_OK);
cb_data->kaddr1 = &res.a1;
break;
case COMMAND_SMC_SVC_VERSION:
cb_data->status = BIT(SVC_STATUS_OK);
cb_data->kaddr1 = &res.a1;
cb_data->kaddr2 = &res.a2;
break;
case COMMAND_RSU_DCMF_VERSION:
cb_data->status = BIT(SVC_STATUS_OK);
cb_data->kaddr1 = &res.a1;
cb_data->kaddr2 = &res.a2;
break;
case COMMAND_FCS_RANDOM_NUMBER_GEN:
case COMMAND_FCS_GET_PROVISION_DATA:
case COMMAND_POLL_SERVICE_STATUS:
cb_data->status = BIT(SVC_STATUS_OK);
cb_data->kaddr1 = &res.a1;
cb_data->kaddr2 = svc_pa_to_va(res.a2);
cb_data->kaddr3 = &res.a3;
break;
default:
pr_warn("it shouldn't happen\n");
break;
}
pr_debug("%s: call receive_cb\n", __func__);
p_data->chan->scl->receive_cb(p_data->chan->scl, cb_data);
}
/**
* svc_normal_to_secure_thread() - the function to run in the kthread
* @data: data pointer for kthread function
*
* Service layer driver creates stratix10_svc_smc_hvc_call kthread on CPU
* node 0, its function stratix10_svc_secure_call_thread is used to handle
* SMC or HVC calls between kernel driver and secure monitor software.
*
* Return: 0 for success or -ENOMEM on error.
*/
static int svc_normal_to_secure_thread(void *data)
{
struct stratix10_svc_controller
*ctrl = (struct stratix10_svc_controller *)data;
struct stratix10_svc_data *pdata;
struct stratix10_svc_cb_data *cbdata;
struct arm_smccc_res res;
unsigned long a0, a1, a2, a3, a4, a5, a6, a7;
int ret_fifo = 0;
pdata = kmalloc(sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return -ENOMEM;
cbdata = kmalloc(sizeof(*cbdata), GFP_KERNEL);
if (!cbdata) {
kfree(pdata);
return -ENOMEM;
}
/* default set, to remove build warning */
a0 = INTEL_SIP_SMC_FPGA_CONFIG_LOOPBACK;
a1 = 0;
a2 = 0;
a3 = 0;
a4 = 0;
a5 = 0;
a6 = 0;
a7 = 0;
pr_debug("smc_hvc_shm_thread is running\n");
while (!kthread_should_stop()) {
ret_fifo = kfifo_out_spinlocked(&ctrl->svc_fifo,
pdata, sizeof(*pdata),
&ctrl->svc_fifo_lock);
if (!ret_fifo)
continue;
pr_debug("get from FIFO pa=0x%016x, command=%u, size=%u\n",
(unsigned int)pdata->paddr, pdata->command,
(unsigned int)pdata->size);
switch (pdata->command) {
case COMMAND_RECONFIG_DATA_CLAIM:
svc_thread_cmd_data_claim(ctrl, pdata, cbdata);
continue;
case COMMAND_RECONFIG:
a0 = INTEL_SIP_SMC_FPGA_CONFIG_START;
pr_debug("conf_type=%u\n", (unsigned int)pdata->flag);
a1 = pdata->flag;
a2 = 0;
break;
case COMMAND_RECONFIG_DATA_SUBMIT:
a0 = INTEL_SIP_SMC_FPGA_CONFIG_WRITE;
a1 = (unsigned long)pdata->paddr;
a2 = (unsigned long)pdata->size;
break;
case COMMAND_RECONFIG_STATUS:
a0 = INTEL_SIP_SMC_FPGA_CONFIG_ISDONE;
a1 = 0;
a2 = 0;
break;
case COMMAND_RSU_STATUS:
a0 = INTEL_SIP_SMC_RSU_STATUS;
a1 = 0;
a2 = 0;
break;
case COMMAND_RSU_UPDATE:
a0 = INTEL_SIP_SMC_RSU_UPDATE;
a1 = pdata->arg[0];
a2 = 0;
break;
case COMMAND_RSU_NOTIFY:
a0 = INTEL_SIP_SMC_RSU_NOTIFY;
a1 = pdata->arg[0];
a2 = 0;
break;
case COMMAND_RSU_RETRY:
a0 = INTEL_SIP_SMC_RSU_RETRY_COUNTER;
a1 = 0;
a2 = 0;
break;
case COMMAND_RSU_MAX_RETRY:
a0 = INTEL_SIP_SMC_RSU_MAX_RETRY;
a1 = 0;
a2 = 0;
break;
case COMMAND_RSU_DCMF_VERSION:
a0 = INTEL_SIP_SMC_RSU_DCMF_VERSION;
a1 = 0;
a2 = 0;
break;
case COMMAND_FIRMWARE_VERSION:
a0 = INTEL_SIP_SMC_FIRMWARE_VERSION;
a1 = 0;
a2 = 0;
break;
/* for FCS */
case COMMAND_FCS_DATA_ENCRYPTION:
a0 = INTEL_SIP_SMC_FCS_CRYPTION;
a1 = 1;
a2 = (unsigned long)pdata->paddr;
a3 = (unsigned long)pdata->size;
a4 = (unsigned long)pdata->paddr_output;
a5 = (unsigned long)pdata->size_output;
break;
case COMMAND_FCS_DATA_DECRYPTION:
a0 = INTEL_SIP_SMC_FCS_CRYPTION;
a1 = 0;
a2 = (unsigned long)pdata->paddr;
a3 = (unsigned long)pdata->size;
a4 = (unsigned long)pdata->paddr_output;
a5 = (unsigned long)pdata->size_output;
break;
case COMMAND_FCS_RANDOM_NUMBER_GEN:
a0 = INTEL_SIP_SMC_FCS_RANDOM_NUMBER;
a1 = (unsigned long)pdata->paddr;
a2 = 0;
break;
case COMMAND_FCS_REQUEST_SERVICE:
a0 = INTEL_SIP_SMC_FCS_SERVICE_REQUEST;
a1 = (unsigned long)pdata->paddr;
a2 = (unsigned long)pdata->size;
break;
case COMMAND_FCS_SEND_CERTIFICATE:
a0 = INTEL_SIP_SMC_FCS_SEND_CERTIFICATE;
a1 = (unsigned long)pdata->paddr;
a2 = (unsigned long)pdata->size;
break;
case COMMAND_FCS_GET_PROVISION_DATA:
a0 = INTEL_SIP_SMC_FCS_GET_PROVISION_DATA;
a1 = (unsigned long)pdata->paddr;
a2 = 0;
break;
/* for polling */
case COMMAND_POLL_SERVICE_STATUS:
a0 = INTEL_SIP_SMC_SERVICE_COMPLETED;
a1 = (unsigned long)pdata->paddr;
a2 = (unsigned long)pdata->size;
break;
case COMMAND_RSU_DCMF_STATUS:
a0 = INTEL_SIP_SMC_RSU_DCMF_STATUS;
a1 = 0;
a2 = 0;
break;
case COMMAND_SMC_SVC_VERSION:
a0 = INTEL_SIP_SMC_SVC_VERSION;
a1 = 0;
a2 = 0;
break;
default:
pr_warn("it shouldn't happen\n");
break;
}
pr_debug("%s: before SMC call -- a0=0x%016x a1=0x%016x",
__func__,
(unsigned int)a0,
(unsigned int)a1);
pr_debug(" a2=0x%016x\n", (unsigned int)a2);
pr_debug(" a3=0x%016x\n", (unsigned int)a3);
pr_debug(" a4=0x%016x\n", (unsigned int)a4);
pr_debug(" a5=0x%016x\n", (unsigned int)a5);
ctrl->invoke_fn(a0, a1, a2, a3, a4, a5, a6, a7, &res);
pr_debug("%s: after SMC call -- res.a0=0x%016x",
__func__, (unsigned int)res.a0);
pr_debug(" res.a1=0x%016x, res.a2=0x%016x",
(unsigned int)res.a1, (unsigned int)res.a2);
pr_debug(" res.a3=0x%016x\n", (unsigned int)res.a3);
if (pdata->command == COMMAND_RSU_STATUS) {
if (res.a0 == INTEL_SIP_SMC_RSU_ERROR)
cbdata->status = BIT(SVC_STATUS_ERROR);
else
cbdata->status = BIT(SVC_STATUS_OK);
cbdata->kaddr1 = &res;
cbdata->kaddr2 = NULL;
cbdata->kaddr3 = NULL;
pdata->chan->scl->receive_cb(pdata->chan->scl, cbdata);
continue;
}
switch (res.a0) {
case INTEL_SIP_SMC_STATUS_OK:
svc_thread_recv_status_ok(pdata, cbdata, res);
break;
case INTEL_SIP_SMC_STATUS_BUSY:
switch (pdata->command) {
case COMMAND_RECONFIG_DATA_SUBMIT:
svc_thread_cmd_data_claim(ctrl,
pdata, cbdata);
break;
case COMMAND_RECONFIG_STATUS:
case COMMAND_POLL_SERVICE_STATUS:
svc_thread_cmd_config_status(ctrl,
pdata, cbdata);
break;
default:
pr_warn("it shouldn't happen\n");
break;
}
break;
case INTEL_SIP_SMC_STATUS_REJECTED:
pr_debug("%s: STATUS_REJECTED\n", __func__);
/* for FCS */
switch (pdata->command) {
case COMMAND_FCS_REQUEST_SERVICE:
case COMMAND_FCS_SEND_CERTIFICATE:
case COMMAND_FCS_GET_PROVISION_DATA:
case COMMAND_FCS_DATA_ENCRYPTION:
case COMMAND_FCS_DATA_DECRYPTION:
case COMMAND_FCS_RANDOM_NUMBER_GEN:
cbdata->status = BIT(SVC_STATUS_INVALID_PARAM);
cbdata->kaddr1 = NULL;
cbdata->kaddr2 = NULL;
cbdata->kaddr3 = NULL;
pdata->chan->scl->receive_cb(pdata->chan->scl,
cbdata);
break;
}
break;
case INTEL_SIP_SMC_STATUS_ERROR:
case INTEL_SIP_SMC_RSU_ERROR:
pr_err("%s: STATUS_ERROR\n", __func__);
cbdata->status = BIT(SVC_STATUS_ERROR);
cbdata->kaddr1 = &res.a1;
cbdata->kaddr2 = (res.a2) ?
svc_pa_to_va(res.a2) : NULL;
cbdata->kaddr3 = (res.a3) ? &res.a3 : NULL;
pdata->chan->scl->receive_cb(pdata->chan->scl, cbdata);
break;
default:
pr_warn("Secure firmware doesn't support...\n");
/*
* be compatible with older version firmware which
* doesn't support newer RSU commands
*/
if ((pdata->command != COMMAND_RSU_UPDATE) &&
(pdata->command != COMMAND_RSU_STATUS)) {
cbdata->status =
BIT(SVC_STATUS_NO_SUPPORT);
cbdata->kaddr1 = NULL;
cbdata->kaddr2 = NULL;
cbdata->kaddr3 = NULL;
pdata->chan->scl->receive_cb(
pdata->chan->scl, cbdata);
}
break;
}
}
kfree(cbdata);
kfree(pdata);
return 0;
}
/**
* svc_normal_to_secure_shm_thread() - the function to run in the kthread
* @data: data pointer for kthread function
*
* Service layer driver creates stratix10_svc_smc_hvc_shm kthread on CPU
* node 0, its function stratix10_svc_secure_shm_thread is used to query the
* physical address of memory block reserved by secure monitor software at
* secure world.
*
* svc_normal_to_secure_shm_thread() terminates directly since it is a
* standlone thread for which no one will call kthread_stop() or return when
* 'kthread_should_stop()' is true.
*/
static int svc_normal_to_secure_shm_thread(void *data)
{
struct stratix10_svc_sh_memory
*sh_mem = (struct stratix10_svc_sh_memory *)data;
struct arm_smccc_res res;
/* SMC or HVC call to get shared memory info from secure world */
sh_mem->invoke_fn(INTEL_SIP_SMC_FPGA_CONFIG_GET_MEM,
0, 0, 0, 0, 0, 0, 0, &res);
if (res.a0 == INTEL_SIP_SMC_STATUS_OK) {
sh_mem->addr = res.a1;
sh_mem->size = res.a2;
} else {
pr_err("%s: after SMC call -- res.a0=0x%016x", __func__,
(unsigned int)res.a0);
sh_mem->addr = 0;
sh_mem->size = 0;
}
complete(&sh_mem->sync_complete);
return 0;
}
/**
* svc_get_sh_memory() - get memory block reserved by secure monitor SW
* @pdev: pointer to service layer device
* @sh_memory: pointer to service shared memory structure
*
* Return: zero for successfully getting the physical address of memory block
* reserved by secure monitor software, or negative value on error.
*/
static int svc_get_sh_memory(struct platform_device *pdev,
struct stratix10_svc_sh_memory *sh_memory)
{
struct device *dev = &pdev->dev;
struct task_struct *sh_memory_task;
unsigned int cpu = 0;
init_completion(&sh_memory->sync_complete);
/* smc or hvc call happens on cpu 0 bound kthread */
sh_memory_task = kthread_create_on_node(svc_normal_to_secure_shm_thread,
(void *)sh_memory,
cpu_to_node(cpu),
"svc_smc_hvc_shm_thread");
if (IS_ERR(sh_memory_task)) {
dev_err(dev, "fail to create stratix10_svc_smc_shm_thread\n");
return -EINVAL;
}
wake_up_process(sh_memory_task);
if (!wait_for_completion_timeout(&sh_memory->sync_complete, 10 * HZ)) {
dev_err(dev,
"timeout to get sh-memory paras from secure world\n");
return -ETIMEDOUT;
}
if (!sh_memory->addr || !sh_memory->size) {
dev_err(dev,
"failed to get shared memory info from secure world\n");
return -ENOMEM;
}
dev_dbg(dev, "SM software provides paddr: 0x%016x, size: 0x%08x\n",
(unsigned int)sh_memory->addr,
(unsigned int)sh_memory->size);
return 0;
}
/**
* svc_create_memory_pool() - create a memory pool from reserved memory block
* @pdev: pointer to service layer device
* @sh_memory: pointer to service shared memory structure
*
* Return: pool allocated from reserved memory block or ERR_PTR() on error.
*/
static struct gen_pool *
svc_create_memory_pool(struct platform_device *pdev,
struct stratix10_svc_sh_memory *sh_memory)
{
struct device *dev = &pdev->dev;
struct gen_pool *genpool;
unsigned long vaddr;
phys_addr_t paddr;
size_t size;
phys_addr_t begin;
phys_addr_t end;
void *va;
size_t page_mask = PAGE_SIZE - 1;
int min_alloc_order = 3;
int ret;
begin = roundup(sh_memory->addr, PAGE_SIZE);
end = rounddown(sh_memory->addr + sh_memory->size, PAGE_SIZE);
paddr = begin;
size = end - begin;
va = devm_memremap(dev, paddr, size, MEMREMAP_WC);
if (IS_ERR(va)) {
dev_err(dev, "fail to remap shared memory\n");
return ERR_PTR(-EINVAL);
}
vaddr = (unsigned long)va;
dev_dbg(dev,
"reserved memory vaddr: %p, paddr: 0x%16x size: 0x%8x\n",
va, (unsigned int)paddr, (unsigned int)size);
if ((vaddr & page_mask) || (paddr & page_mask) ||
(size & page_mask)) {
dev_err(dev, "page is not aligned\n");
return ERR_PTR(-EINVAL);
}
genpool = gen_pool_create(min_alloc_order, -1);
if (!genpool) {
dev_err(dev, "fail to create genpool\n");
return ERR_PTR(-ENOMEM);
}
gen_pool_set_algo(genpool, gen_pool_best_fit, NULL);
ret = gen_pool_add_virt(genpool, vaddr, paddr, size, -1);
if (ret) {
dev_err(dev, "fail to add memory chunk to the pool\n");
gen_pool_destroy(genpool);
return ERR_PTR(ret);
}
return genpool;
}
/**
* svc_smccc_smc() - secure monitor call between normal and secure world
* @a0: argument passed in registers 0
* @a1: argument passed in registers 1
* @a2: argument passed in registers 2
* @a3: argument passed in registers 3
* @a4: argument passed in registers 4
* @a5: argument passed in registers 5
* @a6: argument passed in registers 6
* @a7: argument passed in registers 7
* @res: result values from register 0 to 3
*/
static void svc_smccc_smc(unsigned long a0, unsigned long a1,
unsigned long a2, unsigned long a3,
unsigned long a4, unsigned long a5,
unsigned long a6, unsigned long a7,
struct arm_smccc_res *res)
{
arm_smccc_smc(a0, a1, a2, a3, a4, a5, a6, a7, res);
}
/**
* svc_smccc_hvc() - hypervisor call between normal and secure world
* @a0: argument passed in registers 0
* @a1: argument passed in registers 1
* @a2: argument passed in registers 2
* @a3: argument passed in registers 3
* @a4: argument passed in registers 4
* @a5: argument passed in registers 5
* @a6: argument passed in registers 6
* @a7: argument passed in registers 7
* @res: result values from register 0 to 3
*/
static void svc_smccc_hvc(unsigned long a0, unsigned long a1,
unsigned long a2, unsigned long a3,
unsigned long a4, unsigned long a5,
unsigned long a6, unsigned long a7,
struct arm_smccc_res *res)
{
arm_smccc_hvc(a0, a1, a2, a3, a4, a5, a6, a7, res);
}
/**
* get_invoke_func() - invoke SMC or HVC call
* @dev: pointer to device
*
* Return: function pointer to svc_smccc_smc or svc_smccc_hvc.
*/
static svc_invoke_fn *get_invoke_func(struct device *dev)
{
const char *method;
if (of_property_read_string(dev->of_node, "method", &method)) {
dev_warn(dev, "missing \"method\" property\n");
return ERR_PTR(-ENXIO);
}
if (!strcmp(method, "smc"))
return svc_smccc_smc;
if (!strcmp(method, "hvc"))
return svc_smccc_hvc;
dev_warn(dev, "invalid \"method\" property: %s\n", method);
return ERR_PTR(-EINVAL);
}
/**
* stratix10_svc_request_channel_byname() - request a service channel
* @client: pointer to service client
* @name: service client name
*
* This function is used by service client to request a service channel.
*
* Return: a pointer to channel assigned to the client on success,
* or ERR_PTR() on error.
*/
struct stratix10_svc_chan *stratix10_svc_request_channel_byname(
struct stratix10_svc_client *client, const char *name)
{
struct device *dev = client->dev;
struct stratix10_svc_controller *controller;
struct stratix10_svc_chan *chan = NULL;
unsigned long flag;
int i;
/* if probe was called after client's, or error on probe */
if (list_empty(&svc_ctrl))
return ERR_PTR(-EPROBE_DEFER);
controller = list_first_entry(&svc_ctrl,
struct stratix10_svc_controller, node);
for (i = 0; i < SVC_NUM_CHANNEL; i++) {
if (!strcmp(controller->chans[i].name, name)) {
chan = &controller->chans[i];
break;
}
}
/* if there was no channel match */
if (i == SVC_NUM_CHANNEL) {
dev_err(dev, "%s: channel not allocated\n", __func__);
return ERR_PTR(-EINVAL);
}
if (chan->scl || !try_module_get(controller->dev->driver->owner)) {
dev_dbg(dev, "%s: svc not free\n", __func__);
return ERR_PTR(-EBUSY);
}
spin_lock_irqsave(&chan->lock, flag);
chan->scl = client;
chan->ctrl->num_active_client++;
spin_unlock_irqrestore(&chan->lock, flag);
return chan;
}
EXPORT_SYMBOL_GPL(stratix10_svc_request_channel_byname);
/**
* stratix10_svc_free_channel() - free service channel
* @chan: service channel to be freed
*
* This function is used by service client to free a service channel.
*/
void stratix10_svc_free_channel(struct stratix10_svc_chan *chan)
{
unsigned long flag;
spin_lock_irqsave(&chan->lock, flag);
chan->scl = NULL;
chan->ctrl->num_active_client--;
module_put(chan->ctrl->dev->driver->owner);
spin_unlock_irqrestore(&chan->lock, flag);
}
EXPORT_SYMBOL_GPL(stratix10_svc_free_channel);
/**
* stratix10_svc_send() - send a message data to the remote
* @chan: service channel assigned to the client
* @msg: message data to be sent, in the format of
* "struct stratix10_svc_client_msg"
*
* This function is used by service client to add a message to the service
* layer driver's queue for being sent to the secure world.
*
* Return: 0 for success, -ENOMEM or -ENOBUFS on error.
*/
int stratix10_svc_send(struct stratix10_svc_chan *chan, void *msg)
{
struct stratix10_svc_client_msg
*p_msg = (struct stratix10_svc_client_msg *)msg;
struct stratix10_svc_data_mem *p_mem;
struct stratix10_svc_data *p_data;
int ret = 0;
unsigned int cpu = 0;
p_data = kzalloc(sizeof(*p_data), GFP_KERNEL);
if (!p_data)
return -ENOMEM;
/* first client will create kernel thread */
if (!chan->ctrl->task) {
chan->ctrl->task =
kthread_create_on_node(svc_normal_to_secure_thread,
(void *)chan->ctrl,
cpu_to_node(cpu),
"svc_smc_hvc_thread");
if (IS_ERR(chan->ctrl->task)) {
dev_err(chan->ctrl->dev,
"failed to create svc_smc_hvc_thread\n");
kfree(p_data);
return -EINVAL;
}
kthread_bind(chan->ctrl->task, cpu);
wake_up_process(chan->ctrl->task);
}
pr_debug("%s: sent P-va=%p, P-com=%x, P-size=%u\n", __func__,
p_msg->payload, p_msg->command,
(unsigned int)p_msg->payload_length);
if (list_empty(&svc_data_mem)) {
if (p_msg->command == COMMAND_RECONFIG) {
struct stratix10_svc_command_config_type *ct =
(struct stratix10_svc_command_config_type *)
p_msg->payload;
p_data->flag = ct->flags;
}
} else {
list_for_each_entry(p_mem, &svc_data_mem, node)
if (p_mem->vaddr == p_msg->payload) {
p_data->paddr = p_mem->paddr;
p_data->size = p_msg->payload_length;
break;
}
if (p_msg->payload_output) {
list_for_each_entry(p_mem, &svc_data_mem, node)
if (p_mem->vaddr == p_msg->payload_output) {
p_data->paddr_output =
p_mem->paddr;
p_data->size_output =
p_msg->payload_length_output;
break;
}
}
}
p_data->command = p_msg->command;
p_data->arg[0] = p_msg->arg[0];
p_data->arg[1] = p_msg->arg[1];
p_data->arg[2] = p_msg->arg[2];
p_data->size = p_msg->payload_length;