forked from microsoft/WSL2-Linux-Kernel
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathswitchtec.c
1840 lines (1505 loc) · 48.2 KB
/
switchtec.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
/*
* Microsemi Switchtec(tm) PCIe Management Driver
* Copyright (c) 2017, Microsemi Corporation
*/
#include <linux/switchtec.h>
#include <linux/switchtec_ioctl.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/uaccess.h>
#include <linux/poll.h>
#include <linux/wait.h>
#include <linux/io-64-nonatomic-lo-hi.h>
#include <linux/nospec.h>
MODULE_DESCRIPTION("Microsemi Switchtec(tm) PCIe Management Driver");
MODULE_VERSION("0.1");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Microsemi Corporation");
static int max_devices = 16;
module_param(max_devices, int, 0644);
MODULE_PARM_DESC(max_devices, "max number of switchtec device instances");
static bool use_dma_mrpc = true;
module_param(use_dma_mrpc, bool, 0644);
MODULE_PARM_DESC(use_dma_mrpc,
"Enable the use of the DMA MRPC feature");
static int nirqs = 32;
module_param(nirqs, int, 0644);
MODULE_PARM_DESC(nirqs, "number of interrupts to allocate (more may be useful for NTB applications)");
static dev_t switchtec_devt;
static DEFINE_IDA(switchtec_minor_ida);
struct class *switchtec_class;
EXPORT_SYMBOL_GPL(switchtec_class);
enum mrpc_state {
MRPC_IDLE = 0,
MRPC_QUEUED,
MRPC_RUNNING,
MRPC_DONE,
MRPC_IO_ERROR,
};
struct switchtec_user {
struct switchtec_dev *stdev;
enum mrpc_state state;
wait_queue_head_t cmd_comp;
struct kref kref;
struct list_head list;
bool cmd_done;
u32 cmd;
u32 status;
u32 return_code;
size_t data_len;
size_t read_len;
unsigned char data[SWITCHTEC_MRPC_PAYLOAD_SIZE];
int event_cnt;
};
/*
* The MMIO reads to the device_id register should always return the device ID
* of the device, otherwise the firmware is probably stuck or unreachable
* due to a firmware reset which clears PCI state including the BARs and Memory
* Space Enable bits.
*/
static int is_firmware_running(struct switchtec_dev *stdev)
{
u32 device = ioread32(&stdev->mmio_sys_info->device_id);
return stdev->pdev->device == device;
}
static struct switchtec_user *stuser_create(struct switchtec_dev *stdev)
{
struct switchtec_user *stuser;
stuser = kzalloc(sizeof(*stuser), GFP_KERNEL);
if (!stuser)
return ERR_PTR(-ENOMEM);
get_device(&stdev->dev);
stuser->stdev = stdev;
kref_init(&stuser->kref);
INIT_LIST_HEAD(&stuser->list);
init_waitqueue_head(&stuser->cmd_comp);
stuser->event_cnt = atomic_read(&stdev->event_cnt);
dev_dbg(&stdev->dev, "%s: %p\n", __func__, stuser);
return stuser;
}
static void stuser_free(struct kref *kref)
{
struct switchtec_user *stuser;
stuser = container_of(kref, struct switchtec_user, kref);
dev_dbg(&stuser->stdev->dev, "%s: %p\n", __func__, stuser);
put_device(&stuser->stdev->dev);
kfree(stuser);
}
static void stuser_put(struct switchtec_user *stuser)
{
kref_put(&stuser->kref, stuser_free);
}
static void stuser_set_state(struct switchtec_user *stuser,
enum mrpc_state state)
{
/* requires the mrpc_mutex to already be held when called */
static const char * const state_names[] = {
[MRPC_IDLE] = "IDLE",
[MRPC_QUEUED] = "QUEUED",
[MRPC_RUNNING] = "RUNNING",
[MRPC_DONE] = "DONE",
[MRPC_IO_ERROR] = "IO_ERROR",
};
stuser->state = state;
dev_dbg(&stuser->stdev->dev, "stuser state %p -> %s",
stuser, state_names[state]);
}
static void mrpc_complete_cmd(struct switchtec_dev *stdev);
static void flush_wc_buf(struct switchtec_dev *stdev)
{
struct ntb_dbmsg_regs __iomem *mmio_dbmsg;
/*
* odb (outbound doorbell) register is processed by low latency
* hardware and w/o side effect
*/
mmio_dbmsg = (void __iomem *)stdev->mmio_ntb +
SWITCHTEC_NTB_REG_DBMSG_OFFSET;
ioread32(&mmio_dbmsg->odb);
}
static void mrpc_cmd_submit(struct switchtec_dev *stdev)
{
/* requires the mrpc_mutex to already be held when called */
struct switchtec_user *stuser;
if (stdev->mrpc_busy)
return;
if (list_empty(&stdev->mrpc_queue))
return;
stuser = list_entry(stdev->mrpc_queue.next, struct switchtec_user,
list);
if (stdev->dma_mrpc) {
stdev->dma_mrpc->status = SWITCHTEC_MRPC_STATUS_INPROGRESS;
memset(stdev->dma_mrpc->data, 0xFF, SWITCHTEC_MRPC_PAYLOAD_SIZE);
}
stuser_set_state(stuser, MRPC_RUNNING);
stdev->mrpc_busy = 1;
memcpy_toio(&stdev->mmio_mrpc->input_data,
stuser->data, stuser->data_len);
flush_wc_buf(stdev);
iowrite32(stuser->cmd, &stdev->mmio_mrpc->cmd);
schedule_delayed_work(&stdev->mrpc_timeout,
msecs_to_jiffies(500));
}
static int mrpc_queue_cmd(struct switchtec_user *stuser)
{
/* requires the mrpc_mutex to already be held when called */
struct switchtec_dev *stdev = stuser->stdev;
kref_get(&stuser->kref);
stuser->read_len = sizeof(stuser->data);
stuser_set_state(stuser, MRPC_QUEUED);
stuser->cmd_done = false;
list_add_tail(&stuser->list, &stdev->mrpc_queue);
mrpc_cmd_submit(stdev);
return 0;
}
static void mrpc_cleanup_cmd(struct switchtec_dev *stdev)
{
/* requires the mrpc_mutex to already be held when called */
struct switchtec_user *stuser = list_entry(stdev->mrpc_queue.next,
struct switchtec_user, list);
stuser->cmd_done = true;
wake_up_interruptible(&stuser->cmd_comp);
list_del_init(&stuser->list);
stuser_put(stuser);
stdev->mrpc_busy = 0;
mrpc_cmd_submit(stdev);
}
static void mrpc_complete_cmd(struct switchtec_dev *stdev)
{
/* requires the mrpc_mutex to already be held when called */
struct switchtec_user *stuser;
if (list_empty(&stdev->mrpc_queue))
return;
stuser = list_entry(stdev->mrpc_queue.next, struct switchtec_user,
list);
if (stdev->dma_mrpc)
stuser->status = stdev->dma_mrpc->status;
else
stuser->status = ioread32(&stdev->mmio_mrpc->status);
if (stuser->status == SWITCHTEC_MRPC_STATUS_INPROGRESS)
return;
stuser_set_state(stuser, MRPC_DONE);
stuser->return_code = 0;
if (stuser->status != SWITCHTEC_MRPC_STATUS_DONE &&
stuser->status != SWITCHTEC_MRPC_STATUS_ERROR)
goto out;
if (stdev->dma_mrpc)
stuser->return_code = stdev->dma_mrpc->rtn_code;
else
stuser->return_code = ioread32(&stdev->mmio_mrpc->ret_value);
if (stuser->return_code != 0)
goto out;
if (stdev->dma_mrpc)
memcpy(stuser->data, &stdev->dma_mrpc->data,
stuser->read_len);
else
memcpy_fromio(stuser->data, &stdev->mmio_mrpc->output_data,
stuser->read_len);
out:
mrpc_cleanup_cmd(stdev);
}
static void mrpc_event_work(struct work_struct *work)
{
struct switchtec_dev *stdev;
stdev = container_of(work, struct switchtec_dev, mrpc_work);
dev_dbg(&stdev->dev, "%s\n", __func__);
mutex_lock(&stdev->mrpc_mutex);
cancel_delayed_work(&stdev->mrpc_timeout);
mrpc_complete_cmd(stdev);
mutex_unlock(&stdev->mrpc_mutex);
}
static void mrpc_error_complete_cmd(struct switchtec_dev *stdev)
{
/* requires the mrpc_mutex to already be held when called */
struct switchtec_user *stuser;
if (list_empty(&stdev->mrpc_queue))
return;
stuser = list_entry(stdev->mrpc_queue.next,
struct switchtec_user, list);
stuser_set_state(stuser, MRPC_IO_ERROR);
mrpc_cleanup_cmd(stdev);
}
static void mrpc_timeout_work(struct work_struct *work)
{
struct switchtec_dev *stdev;
u32 status;
stdev = container_of(work, struct switchtec_dev, mrpc_timeout.work);
dev_dbg(&stdev->dev, "%s\n", __func__);
mutex_lock(&stdev->mrpc_mutex);
if (!is_firmware_running(stdev)) {
mrpc_error_complete_cmd(stdev);
goto out;
}
if (stdev->dma_mrpc)
status = stdev->dma_mrpc->status;
else
status = ioread32(&stdev->mmio_mrpc->status);
if (status == SWITCHTEC_MRPC_STATUS_INPROGRESS) {
schedule_delayed_work(&stdev->mrpc_timeout,
msecs_to_jiffies(500));
goto out;
}
mrpc_complete_cmd(stdev);
out:
mutex_unlock(&stdev->mrpc_mutex);
}
static ssize_t device_version_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct switchtec_dev *stdev = to_stdev(dev);
u32 ver;
ver = ioread32(&stdev->mmio_sys_info->device_version);
return sysfs_emit(buf, "%x\n", ver);
}
static DEVICE_ATTR_RO(device_version);
static ssize_t fw_version_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct switchtec_dev *stdev = to_stdev(dev);
u32 ver;
ver = ioread32(&stdev->mmio_sys_info->firmware_version);
return sysfs_emit(buf, "%08x\n", ver);
}
static DEVICE_ATTR_RO(fw_version);
static ssize_t io_string_show(char *buf, void __iomem *attr, size_t len)
{
int i;
memcpy_fromio(buf, attr, len);
buf[len] = '\n';
buf[len + 1] = 0;
for (i = len - 1; i > 0; i--) {
if (buf[i] != ' ')
break;
buf[i] = '\n';
buf[i + 1] = 0;
}
return strlen(buf);
}
#define DEVICE_ATTR_SYS_INFO_STR(field) \
static ssize_t field ## _show(struct device *dev, \
struct device_attribute *attr, char *buf) \
{ \
struct switchtec_dev *stdev = to_stdev(dev); \
struct sys_info_regs __iomem *si = stdev->mmio_sys_info; \
if (stdev->gen == SWITCHTEC_GEN3) \
return io_string_show(buf, &si->gen3.field, \
sizeof(si->gen3.field)); \
else if (stdev->gen == SWITCHTEC_GEN4) \
return io_string_show(buf, &si->gen4.field, \
sizeof(si->gen4.field)); \
else \
return -EOPNOTSUPP; \
} \
\
static DEVICE_ATTR_RO(field)
DEVICE_ATTR_SYS_INFO_STR(vendor_id);
DEVICE_ATTR_SYS_INFO_STR(product_id);
DEVICE_ATTR_SYS_INFO_STR(product_revision);
static ssize_t component_vendor_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct switchtec_dev *stdev = to_stdev(dev);
struct sys_info_regs __iomem *si = stdev->mmio_sys_info;
/* component_vendor field not supported after gen3 */
if (stdev->gen != SWITCHTEC_GEN3)
return sysfs_emit(buf, "none\n");
return io_string_show(buf, &si->gen3.component_vendor,
sizeof(si->gen3.component_vendor));
}
static DEVICE_ATTR_RO(component_vendor);
static ssize_t component_id_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct switchtec_dev *stdev = to_stdev(dev);
int id = ioread16(&stdev->mmio_sys_info->gen3.component_id);
/* component_id field not supported after gen3 */
if (stdev->gen != SWITCHTEC_GEN3)
return sysfs_emit(buf, "none\n");
return sysfs_emit(buf, "PM%04X\n", id);
}
static DEVICE_ATTR_RO(component_id);
static ssize_t component_revision_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct switchtec_dev *stdev = to_stdev(dev);
int rev = ioread8(&stdev->mmio_sys_info->gen3.component_revision);
/* component_revision field not supported after gen3 */
if (stdev->gen != SWITCHTEC_GEN3)
return sysfs_emit(buf, "255\n");
return sysfs_emit(buf, "%d\n", rev);
}
static DEVICE_ATTR_RO(component_revision);
static ssize_t partition_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct switchtec_dev *stdev = to_stdev(dev);
return sysfs_emit(buf, "%d\n", stdev->partition);
}
static DEVICE_ATTR_RO(partition);
static ssize_t partition_count_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct switchtec_dev *stdev = to_stdev(dev);
return sysfs_emit(buf, "%d\n", stdev->partition_count);
}
static DEVICE_ATTR_RO(partition_count);
static struct attribute *switchtec_device_attrs[] = {
&dev_attr_device_version.attr,
&dev_attr_fw_version.attr,
&dev_attr_vendor_id.attr,
&dev_attr_product_id.attr,
&dev_attr_product_revision.attr,
&dev_attr_component_vendor.attr,
&dev_attr_component_id.attr,
&dev_attr_component_revision.attr,
&dev_attr_partition.attr,
&dev_attr_partition_count.attr,
NULL,
};
ATTRIBUTE_GROUPS(switchtec_device);
static int switchtec_dev_open(struct inode *inode, struct file *filp)
{
struct switchtec_dev *stdev;
struct switchtec_user *stuser;
stdev = container_of(inode->i_cdev, struct switchtec_dev, cdev);
stuser = stuser_create(stdev);
if (IS_ERR(stuser))
return PTR_ERR(stuser);
filp->private_data = stuser;
stream_open(inode, filp);
dev_dbg(&stdev->dev, "%s: %p\n", __func__, stuser);
return 0;
}
static int switchtec_dev_release(struct inode *inode, struct file *filp)
{
struct switchtec_user *stuser = filp->private_data;
stuser_put(stuser);
return 0;
}
static int lock_mutex_and_test_alive(struct switchtec_dev *stdev)
{
if (mutex_lock_interruptible(&stdev->mrpc_mutex))
return -EINTR;
if (!stdev->alive) {
mutex_unlock(&stdev->mrpc_mutex);
return -ENODEV;
}
return 0;
}
static ssize_t switchtec_dev_write(struct file *filp, const char __user *data,
size_t size, loff_t *off)
{
struct switchtec_user *stuser = filp->private_data;
struct switchtec_dev *stdev = stuser->stdev;
int rc;
if (size < sizeof(stuser->cmd) ||
size > sizeof(stuser->cmd) + sizeof(stuser->data))
return -EINVAL;
stuser->data_len = size - sizeof(stuser->cmd);
rc = lock_mutex_and_test_alive(stdev);
if (rc)
return rc;
if (stuser->state != MRPC_IDLE) {
rc = -EBADE;
goto out;
}
rc = copy_from_user(&stuser->cmd, data, sizeof(stuser->cmd));
if (rc) {
rc = -EFAULT;
goto out;
}
if (((MRPC_CMD_ID(stuser->cmd) == MRPC_GAS_WRITE) ||
(MRPC_CMD_ID(stuser->cmd) == MRPC_GAS_READ)) &&
!capable(CAP_SYS_ADMIN)) {
rc = -EPERM;
goto out;
}
data += sizeof(stuser->cmd);
rc = copy_from_user(&stuser->data, data, size - sizeof(stuser->cmd));
if (rc) {
rc = -EFAULT;
goto out;
}
rc = mrpc_queue_cmd(stuser);
out:
mutex_unlock(&stdev->mrpc_mutex);
if (rc)
return rc;
return size;
}
static ssize_t switchtec_dev_read(struct file *filp, char __user *data,
size_t size, loff_t *off)
{
struct switchtec_user *stuser = filp->private_data;
struct switchtec_dev *stdev = stuser->stdev;
int rc;
if (size < sizeof(stuser->cmd) ||
size > sizeof(stuser->cmd) + sizeof(stuser->data))
return -EINVAL;
rc = lock_mutex_and_test_alive(stdev);
if (rc)
return rc;
if (stuser->state == MRPC_IDLE) {
mutex_unlock(&stdev->mrpc_mutex);
return -EBADE;
}
stuser->read_len = size - sizeof(stuser->return_code);
mutex_unlock(&stdev->mrpc_mutex);
if (filp->f_flags & O_NONBLOCK) {
if (!stuser->cmd_done)
return -EAGAIN;
} else {
rc = wait_event_interruptible(stuser->cmd_comp,
stuser->cmd_done);
if (rc < 0)
return rc;
}
rc = lock_mutex_and_test_alive(stdev);
if (rc)
return rc;
if (stuser->state == MRPC_IO_ERROR) {
mutex_unlock(&stdev->mrpc_mutex);
return -EIO;
}
if (stuser->state != MRPC_DONE) {
mutex_unlock(&stdev->mrpc_mutex);
return -EBADE;
}
rc = copy_to_user(data, &stuser->return_code,
sizeof(stuser->return_code));
if (rc) {
mutex_unlock(&stdev->mrpc_mutex);
return -EFAULT;
}
data += sizeof(stuser->return_code);
rc = copy_to_user(data, &stuser->data,
size - sizeof(stuser->return_code));
if (rc) {
mutex_unlock(&stdev->mrpc_mutex);
return -EFAULT;
}
stuser_set_state(stuser, MRPC_IDLE);
mutex_unlock(&stdev->mrpc_mutex);
if (stuser->status == SWITCHTEC_MRPC_STATUS_DONE ||
stuser->status == SWITCHTEC_MRPC_STATUS_ERROR)
return size;
else if (stuser->status == SWITCHTEC_MRPC_STATUS_INTERRUPTED)
return -ENXIO;
else
return -EBADMSG;
}
static __poll_t switchtec_dev_poll(struct file *filp, poll_table *wait)
{
struct switchtec_user *stuser = filp->private_data;
struct switchtec_dev *stdev = stuser->stdev;
__poll_t ret = 0;
poll_wait(filp, &stuser->cmd_comp, wait);
poll_wait(filp, &stdev->event_wq, wait);
if (lock_mutex_and_test_alive(stdev))
return EPOLLIN | EPOLLRDHUP | EPOLLOUT | EPOLLERR | EPOLLHUP;
mutex_unlock(&stdev->mrpc_mutex);
if (stuser->cmd_done)
ret |= EPOLLIN | EPOLLRDNORM;
if (stuser->event_cnt != atomic_read(&stdev->event_cnt))
ret |= EPOLLPRI | EPOLLRDBAND;
return ret;
}
static int ioctl_flash_info(struct switchtec_dev *stdev,
struct switchtec_ioctl_flash_info __user *uinfo)
{
struct switchtec_ioctl_flash_info info = {0};
struct flash_info_regs __iomem *fi = stdev->mmio_flash_info;
if (stdev->gen == SWITCHTEC_GEN3) {
info.flash_length = ioread32(&fi->gen3.flash_length);
info.num_partitions = SWITCHTEC_NUM_PARTITIONS_GEN3;
} else if (stdev->gen == SWITCHTEC_GEN4) {
info.flash_length = ioread32(&fi->gen4.flash_length);
info.num_partitions = SWITCHTEC_NUM_PARTITIONS_GEN4;
} else {
return -EOPNOTSUPP;
}
if (copy_to_user(uinfo, &info, sizeof(info)))
return -EFAULT;
return 0;
}
static void set_fw_info_part(struct switchtec_ioctl_flash_part_info *info,
struct partition_info __iomem *pi)
{
info->address = ioread32(&pi->address);
info->length = ioread32(&pi->length);
}
static int flash_part_info_gen3(struct switchtec_dev *stdev,
struct switchtec_ioctl_flash_part_info *info)
{
struct flash_info_regs_gen3 __iomem *fi =
&stdev->mmio_flash_info->gen3;
struct sys_info_regs_gen3 __iomem *si = &stdev->mmio_sys_info->gen3;
u32 active_addr = -1;
switch (info->flash_partition) {
case SWITCHTEC_IOCTL_PART_CFG0:
active_addr = ioread32(&fi->active_cfg);
set_fw_info_part(info, &fi->cfg0);
if (ioread16(&si->cfg_running) == SWITCHTEC_GEN3_CFG0_RUNNING)
info->active |= SWITCHTEC_IOCTL_PART_RUNNING;
break;
case SWITCHTEC_IOCTL_PART_CFG1:
active_addr = ioread32(&fi->active_cfg);
set_fw_info_part(info, &fi->cfg1);
if (ioread16(&si->cfg_running) == SWITCHTEC_GEN3_CFG1_RUNNING)
info->active |= SWITCHTEC_IOCTL_PART_RUNNING;
break;
case SWITCHTEC_IOCTL_PART_IMG0:
active_addr = ioread32(&fi->active_img);
set_fw_info_part(info, &fi->img0);
if (ioread16(&si->img_running) == SWITCHTEC_GEN3_IMG0_RUNNING)
info->active |= SWITCHTEC_IOCTL_PART_RUNNING;
break;
case SWITCHTEC_IOCTL_PART_IMG1:
active_addr = ioread32(&fi->active_img);
set_fw_info_part(info, &fi->img1);
if (ioread16(&si->img_running) == SWITCHTEC_GEN3_IMG1_RUNNING)
info->active |= SWITCHTEC_IOCTL_PART_RUNNING;
break;
case SWITCHTEC_IOCTL_PART_NVLOG:
set_fw_info_part(info, &fi->nvlog);
break;
case SWITCHTEC_IOCTL_PART_VENDOR0:
set_fw_info_part(info, &fi->vendor[0]);
break;
case SWITCHTEC_IOCTL_PART_VENDOR1:
set_fw_info_part(info, &fi->vendor[1]);
break;
case SWITCHTEC_IOCTL_PART_VENDOR2:
set_fw_info_part(info, &fi->vendor[2]);
break;
case SWITCHTEC_IOCTL_PART_VENDOR3:
set_fw_info_part(info, &fi->vendor[3]);
break;
case SWITCHTEC_IOCTL_PART_VENDOR4:
set_fw_info_part(info, &fi->vendor[4]);
break;
case SWITCHTEC_IOCTL_PART_VENDOR5:
set_fw_info_part(info, &fi->vendor[5]);
break;
case SWITCHTEC_IOCTL_PART_VENDOR6:
set_fw_info_part(info, &fi->vendor[6]);
break;
case SWITCHTEC_IOCTL_PART_VENDOR7:
set_fw_info_part(info, &fi->vendor[7]);
break;
default:
return -EINVAL;
}
if (info->address == active_addr)
info->active |= SWITCHTEC_IOCTL_PART_ACTIVE;
return 0;
}
static int flash_part_info_gen4(struct switchtec_dev *stdev,
struct switchtec_ioctl_flash_part_info *info)
{
struct flash_info_regs_gen4 __iomem *fi = &stdev->mmio_flash_info->gen4;
struct sys_info_regs_gen4 __iomem *si = &stdev->mmio_sys_info->gen4;
struct active_partition_info_gen4 __iomem *af = &fi->active_flag;
switch (info->flash_partition) {
case SWITCHTEC_IOCTL_PART_MAP_0:
set_fw_info_part(info, &fi->map0);
break;
case SWITCHTEC_IOCTL_PART_MAP_1:
set_fw_info_part(info, &fi->map1);
break;
case SWITCHTEC_IOCTL_PART_KEY_0:
set_fw_info_part(info, &fi->key0);
if (ioread8(&af->key) == SWITCHTEC_GEN4_KEY0_ACTIVE)
info->active |= SWITCHTEC_IOCTL_PART_ACTIVE;
if (ioread16(&si->key_running) == SWITCHTEC_GEN4_KEY0_RUNNING)
info->active |= SWITCHTEC_IOCTL_PART_RUNNING;
break;
case SWITCHTEC_IOCTL_PART_KEY_1:
set_fw_info_part(info, &fi->key1);
if (ioread8(&af->key) == SWITCHTEC_GEN4_KEY1_ACTIVE)
info->active |= SWITCHTEC_IOCTL_PART_ACTIVE;
if (ioread16(&si->key_running) == SWITCHTEC_GEN4_KEY1_RUNNING)
info->active |= SWITCHTEC_IOCTL_PART_RUNNING;
break;
case SWITCHTEC_IOCTL_PART_BL2_0:
set_fw_info_part(info, &fi->bl2_0);
if (ioread8(&af->bl2) == SWITCHTEC_GEN4_BL2_0_ACTIVE)
info->active |= SWITCHTEC_IOCTL_PART_ACTIVE;
if (ioread16(&si->bl2_running) == SWITCHTEC_GEN4_BL2_0_RUNNING)
info->active |= SWITCHTEC_IOCTL_PART_RUNNING;
break;
case SWITCHTEC_IOCTL_PART_BL2_1:
set_fw_info_part(info, &fi->bl2_1);
if (ioread8(&af->bl2) == SWITCHTEC_GEN4_BL2_1_ACTIVE)
info->active |= SWITCHTEC_IOCTL_PART_ACTIVE;
if (ioread16(&si->bl2_running) == SWITCHTEC_GEN4_BL2_1_RUNNING)
info->active |= SWITCHTEC_IOCTL_PART_RUNNING;
break;
case SWITCHTEC_IOCTL_PART_CFG0:
set_fw_info_part(info, &fi->cfg0);
if (ioread8(&af->cfg) == SWITCHTEC_GEN4_CFG0_ACTIVE)
info->active |= SWITCHTEC_IOCTL_PART_ACTIVE;
if (ioread16(&si->cfg_running) == SWITCHTEC_GEN4_CFG0_RUNNING)
info->active |= SWITCHTEC_IOCTL_PART_RUNNING;
break;
case SWITCHTEC_IOCTL_PART_CFG1:
set_fw_info_part(info, &fi->cfg1);
if (ioread8(&af->cfg) == SWITCHTEC_GEN4_CFG1_ACTIVE)
info->active |= SWITCHTEC_IOCTL_PART_ACTIVE;
if (ioread16(&si->cfg_running) == SWITCHTEC_GEN4_CFG1_RUNNING)
info->active |= SWITCHTEC_IOCTL_PART_RUNNING;
break;
case SWITCHTEC_IOCTL_PART_IMG0:
set_fw_info_part(info, &fi->img0);
if (ioread8(&af->img) == SWITCHTEC_GEN4_IMG0_ACTIVE)
info->active |= SWITCHTEC_IOCTL_PART_ACTIVE;
if (ioread16(&si->img_running) == SWITCHTEC_GEN4_IMG0_RUNNING)
info->active |= SWITCHTEC_IOCTL_PART_RUNNING;
break;
case SWITCHTEC_IOCTL_PART_IMG1:
set_fw_info_part(info, &fi->img1);
if (ioread8(&af->img) == SWITCHTEC_GEN4_IMG1_ACTIVE)
info->active |= SWITCHTEC_IOCTL_PART_ACTIVE;
if (ioread16(&si->img_running) == SWITCHTEC_GEN4_IMG1_RUNNING)
info->active |= SWITCHTEC_IOCTL_PART_RUNNING;
break;
case SWITCHTEC_IOCTL_PART_NVLOG:
set_fw_info_part(info, &fi->nvlog);
break;
case SWITCHTEC_IOCTL_PART_VENDOR0:
set_fw_info_part(info, &fi->vendor[0]);
break;
case SWITCHTEC_IOCTL_PART_VENDOR1:
set_fw_info_part(info, &fi->vendor[1]);
break;
case SWITCHTEC_IOCTL_PART_VENDOR2:
set_fw_info_part(info, &fi->vendor[2]);
break;
case SWITCHTEC_IOCTL_PART_VENDOR3:
set_fw_info_part(info, &fi->vendor[3]);
break;
case SWITCHTEC_IOCTL_PART_VENDOR4:
set_fw_info_part(info, &fi->vendor[4]);
break;
case SWITCHTEC_IOCTL_PART_VENDOR5:
set_fw_info_part(info, &fi->vendor[5]);
break;
case SWITCHTEC_IOCTL_PART_VENDOR6:
set_fw_info_part(info, &fi->vendor[6]);
break;
case SWITCHTEC_IOCTL_PART_VENDOR7:
set_fw_info_part(info, &fi->vendor[7]);
break;
default:
return -EINVAL;
}
return 0;
}
static int ioctl_flash_part_info(struct switchtec_dev *stdev,
struct switchtec_ioctl_flash_part_info __user *uinfo)
{
int ret;
struct switchtec_ioctl_flash_part_info info = {0};
if (copy_from_user(&info, uinfo, sizeof(info)))
return -EFAULT;
if (stdev->gen == SWITCHTEC_GEN3) {
ret = flash_part_info_gen3(stdev, &info);
if (ret)
return ret;
} else if (stdev->gen == SWITCHTEC_GEN4) {
ret = flash_part_info_gen4(stdev, &info);
if (ret)
return ret;
} else {
return -EOPNOTSUPP;
}
if (copy_to_user(uinfo, &info, sizeof(info)))
return -EFAULT;
return 0;
}
static int ioctl_event_summary(struct switchtec_dev *stdev,
struct switchtec_user *stuser,
struct switchtec_ioctl_event_summary __user *usum,
size_t size)
{
struct switchtec_ioctl_event_summary *s;
int i;
u32 reg;
int ret = 0;
s = kzalloc(sizeof(*s), GFP_KERNEL);
if (!s)
return -ENOMEM;
s->global = ioread32(&stdev->mmio_sw_event->global_summary);
s->part_bitmap = ioread64(&stdev->mmio_sw_event->part_event_bitmap);
s->local_part = ioread32(&stdev->mmio_part_cfg->part_event_summary);
for (i = 0; i < stdev->partition_count; i++) {
reg = ioread32(&stdev->mmio_part_cfg_all[i].part_event_summary);
s->part[i] = reg;
}
for (i = 0; i < stdev->pff_csr_count; i++) {
reg = ioread32(&stdev->mmio_pff_csr[i].pff_event_summary);
s->pff[i] = reg;
}
if (copy_to_user(usum, s, size)) {
ret = -EFAULT;
goto error_case;
}
stuser->event_cnt = atomic_read(&stdev->event_cnt);
error_case:
kfree(s);
return ret;
}
static u32 __iomem *global_ev_reg(struct switchtec_dev *stdev,
size_t offset, int index)
{
return (void __iomem *)stdev->mmio_sw_event + offset;
}
static u32 __iomem *part_ev_reg(struct switchtec_dev *stdev,
size_t offset, int index)
{
return (void __iomem *)&stdev->mmio_part_cfg_all[index] + offset;
}
static u32 __iomem *pff_ev_reg(struct switchtec_dev *stdev,
size_t offset, int index)
{
return (void __iomem *)&stdev->mmio_pff_csr[index] + offset;
}
#define EV_GLB(i, r)[i] = {offsetof(struct sw_event_regs, r), global_ev_reg}
#define EV_PAR(i, r)[i] = {offsetof(struct part_cfg_regs, r), part_ev_reg}
#define EV_PFF(i, r)[i] = {offsetof(struct pff_csr_regs, r), pff_ev_reg}
static const struct event_reg {
size_t offset;
u32 __iomem *(*map_reg)(struct switchtec_dev *stdev,
size_t offset, int index);
} event_regs[] = {
EV_GLB(SWITCHTEC_IOCTL_EVENT_STACK_ERROR, stack_error_event_hdr),
EV_GLB(SWITCHTEC_IOCTL_EVENT_PPU_ERROR, ppu_error_event_hdr),
EV_GLB(SWITCHTEC_IOCTL_EVENT_ISP_ERROR, isp_error_event_hdr),
EV_GLB(SWITCHTEC_IOCTL_EVENT_SYS_RESET, sys_reset_event_hdr),
EV_GLB(SWITCHTEC_IOCTL_EVENT_FW_EXC, fw_exception_hdr),
EV_GLB(SWITCHTEC_IOCTL_EVENT_FW_NMI, fw_nmi_hdr),
EV_GLB(SWITCHTEC_IOCTL_EVENT_FW_NON_FATAL, fw_non_fatal_hdr),
EV_GLB(SWITCHTEC_IOCTL_EVENT_FW_FATAL, fw_fatal_hdr),
EV_GLB(SWITCHTEC_IOCTL_EVENT_TWI_MRPC_COMP, twi_mrpc_comp_hdr),
EV_GLB(SWITCHTEC_IOCTL_EVENT_TWI_MRPC_COMP_ASYNC,
twi_mrpc_comp_async_hdr),
EV_GLB(SWITCHTEC_IOCTL_EVENT_CLI_MRPC_COMP, cli_mrpc_comp_hdr),
EV_GLB(SWITCHTEC_IOCTL_EVENT_CLI_MRPC_COMP_ASYNC,
cli_mrpc_comp_async_hdr),
EV_GLB(SWITCHTEC_IOCTL_EVENT_GPIO_INT, gpio_interrupt_hdr),
EV_GLB(SWITCHTEC_IOCTL_EVENT_GFMS, gfms_event_hdr),
EV_PAR(SWITCHTEC_IOCTL_EVENT_PART_RESET, part_reset_hdr),
EV_PAR(SWITCHTEC_IOCTL_EVENT_MRPC_COMP, mrpc_comp_hdr),
EV_PAR(SWITCHTEC_IOCTL_EVENT_MRPC_COMP_ASYNC, mrpc_comp_async_hdr),
EV_PAR(SWITCHTEC_IOCTL_EVENT_DYN_PART_BIND_COMP, dyn_binding_hdr),
EV_PAR(SWITCHTEC_IOCTL_EVENT_INTERCOMM_REQ_NOTIFY,
intercomm_notify_hdr),
EV_PFF(SWITCHTEC_IOCTL_EVENT_AER_IN_P2P, aer_in_p2p_hdr),
EV_PFF(SWITCHTEC_IOCTL_EVENT_AER_IN_VEP, aer_in_vep_hdr),
EV_PFF(SWITCHTEC_IOCTL_EVENT_DPC, dpc_hdr),
EV_PFF(SWITCHTEC_IOCTL_EVENT_CTS, cts_hdr),
EV_PFF(SWITCHTEC_IOCTL_EVENT_UEC, uec_hdr),
EV_PFF(SWITCHTEC_IOCTL_EVENT_HOTPLUG, hotplug_hdr),
EV_PFF(SWITCHTEC_IOCTL_EVENT_IER, ier_hdr),
EV_PFF(SWITCHTEC_IOCTL_EVENT_THRESH, threshold_hdr),
EV_PFF(SWITCHTEC_IOCTL_EVENT_POWER_MGMT, power_mgmt_hdr),
EV_PFF(SWITCHTEC_IOCTL_EVENT_TLP_THROTTLING, tlp_throttling_hdr),
EV_PFF(SWITCHTEC_IOCTL_EVENT_FORCE_SPEED, force_speed_hdr),
EV_PFF(SWITCHTEC_IOCTL_EVENT_CREDIT_TIMEOUT, credit_timeout_hdr),
EV_PFF(SWITCHTEC_IOCTL_EVENT_LINK_STATE, link_state_hdr),
};
static u32 __iomem *event_hdr_addr(struct switchtec_dev *stdev,
int event_id, int index)
{
size_t off;
if (event_id < 0 || event_id >= SWITCHTEC_IOCTL_MAX_EVENTS)
return (u32 __iomem *)ERR_PTR(-EINVAL);
off = event_regs[event_id].offset;