-
Notifications
You must be signed in to change notification settings - Fork 3
/
Copy pathGobiUSBNet.c
executable file
·1443 lines (1213 loc) · 39.2 KB
/
GobiUSBNet.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
/*===========================================================================
FILE:
GobiUSBNet.c
DESCRIPTION:
Qualcomm USB Network device for Gobi 3000
FUNCTIONS:
GobiNetSuspend
GobiNetResume
GobiNetDriverBind
GobiNetDriverUnbind
GobiUSBNetURBCallback
GobiUSBNetTXTimeout
GobiUSBNetAutoPMThread
GobiUSBNetStartXmit
GobiUSBNetOpen
GobiUSBNetStop
GobiUSBNetProbe
GobiUSBNetModInit
GobiUSBNetModExit
Copyright (c) 2011, Code Aurora Forum. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of Code Aurora Forum nor
the names of its contributors may be used to endorse or promote
products derived from this software without specific prior written
permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
===========================================================================*/
//---------------------------------------------------------------------------
// Include Files
//---------------------------------------------------------------------------
#include "Structs.h"
#include "QMIDevice.h"
#include "QMI.h"
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/module.h>
//-----------------------------------------------------------------------------
// Definitions
//-----------------------------------------------------------------------------
// Version Information
#define DRIVER_VERSION "Meigsmart_Linux_GobiNet_2016-1-6-0002"
#define DRIVER_AUTHOR "Qualcomm Innovation Center"
#define DRIVER_DESC "GobiNet"
// Debug flag
int debug = 0;
// Allow user interrupts
int interruptible = 1;
// Number of IP packets which may be queued up for transmit
int txQueueLength = 100;
// Class should be created during module init, so needs to be global
static struct class * gpClass;
#ifdef CONFIG_PM
/*===========================================================================
METHOD:
GobiNetSuspend (Public Method)
DESCRIPTION:
Stops QMI traffic while device is suspended
PARAMETERS
pIntf [ I ] - Pointer to interface
powerEvent [ I ] - Power management event
RETURN VALUE:
int - 0 for success
negative errno for failure
===========================================================================*/
int GobiNetSuspend(
struct usb_interface * pIntf,
pm_message_t powerEvent )
{
struct usbnet * pDev;
sGobiUSBNet * pGobiDev;
if (pIntf == 0)
{
return -ENOMEM;
}
#if (LINUX_VERSION_CODE > KERNEL_VERSION( 2,6,23 ))
pDev = usb_get_intfdata( pIntf );
#else
pDev = (struct usbnet *)pIntf->dev.platform_data;
#endif
if (pDev == NULL || pDev->net == NULL)
{
DBG( "failed to get netdevice\n" );
return -ENXIO;
}
pGobiDev = (sGobiUSBNet *)pDev->data[0];
if (pGobiDev == NULL)
{
DBG( "failed to get QMIDevice\n" );
return -ENXIO;
}
// Is this autosuspend or system suspend?
// do we allow remote wakeup?
#if (LINUX_VERSION_CODE < KERNEL_VERSION( 2,6,33 ))
#if (LINUX_VERSION_CODE > KERNEL_VERSION( 2,6,18 ))
if (pDev->udev->auto_pm == 0)
#else
if (1)
#endif
#else
if ((powerEvent.event & PM_EVENT_AUTO) == 0)
#endif
{
DBG( "device suspended to power level %d\n",
powerEvent.event );
GobiSetDownReason( pGobiDev, DRIVER_SUSPENDED );
}
else
{
DBG( "device autosuspend\n" );
}
if (powerEvent.event & PM_EVENT_SUSPEND)
{
// Stop QMI read callbacks
KillRead( pGobiDev );
#if (LINUX_VERSION_CODE > KERNEL_VERSION( 2,6,22 ))
pDev->udev->reset_resume = 0;
#endif
// Store power state to avoid duplicate resumes
pIntf->dev.power.power_state.event = powerEvent.event;
}
else
{
// Other power modes cause QMI connection to be lost
#if (LINUX_VERSION_CODE > KERNEL_VERSION( 2,6,22 ))
pDev->udev->reset_resume = 1;
#endif
}
// Run usbnet's suspend function
return usbnet_suspend( pIntf, powerEvent );
}
/*===========================================================================
METHOD:
GobiNetResume (Public Method)
DESCRIPTION:
Resume QMI traffic or recreate QMI device
PARAMETERS
pIntf [ I ] - Pointer to interface
RETURN VALUE:
int - 0 for success
negative errno for failure
===========================================================================*/
int GobiNetResume( struct usb_interface * pIntf )
{
struct usbnet * pDev;
sGobiUSBNet * pGobiDev;
int nRet;
int oldPowerState;
if (pIntf == 0)
{
return -ENOMEM;
}
#if (LINUX_VERSION_CODE > KERNEL_VERSION( 2,6,23 ))
pDev = usb_get_intfdata( pIntf );
#else
pDev = (struct usbnet *)pIntf->dev.platform_data;
#endif
if (pDev == NULL || pDev->net == NULL)
{
DBG( "failed to get netdevice\n" );
return -ENXIO;
}
pGobiDev = (sGobiUSBNet *)pDev->data[0];
if (pGobiDev == NULL)
{
DBG( "failed to get QMIDevice\n" );
return -ENXIO;
}
oldPowerState = pIntf->dev.power.power_state.event;
pIntf->dev.power.power_state.event = PM_EVENT_ON;
DBG( "resuming from power mode %d\n", oldPowerState );
if (oldPowerState & PM_EVENT_SUSPEND)
{
// It doesn't matter if this is autoresume or system resume
GobiClearDownReason( pGobiDev, DRIVER_SUSPENDED );
nRet = usbnet_resume( pIntf );
if (nRet != 0)
{
DBG( "usbnet_resume error %d\n", nRet );
return nRet;
}
// Restart QMI read callbacks
nRet = StartRead( pGobiDev );
if (nRet != 0)
{
DBG( "StartRead error %d\n", nRet );
return nRet;
}
#ifdef CONFIG_PM
#if (LINUX_VERSION_CODE < KERNEL_VERSION( 2,6,29 ))
// Kick Auto PM thread to process any queued URBs
complete( &pGobiDev->mAutoPM.mThreadDoWork );
#endif
#endif /* CONFIG_PM */
}
else
{
DBG( "nothing to resume\n" );
return 0;
}
return nRet;
}
#endif /* CONFIG_PM */
/*===========================================================================
METHOD:
GobiNetDriverBind (Public Method)
DESCRIPTION:
Setup in and out pipes
PARAMETERS
pDev [ I ] - Pointer to usbnet device
pIntf [ I ] - Pointer to interface
RETURN VALUE:
int - 0 for success
Negative errno for error
===========================================================================*/
static int GobiNetDriverBind(
struct usbnet * pDev,
struct usb_interface * pIntf )
{
int numEndpoints;
int endpointIndex;
struct usb_host_endpoint * pEndpoint = NULL;
struct usb_host_endpoint * pIn = NULL;
struct usb_host_endpoint * pOut = NULL;
// Verify one altsetting
if (pIntf->num_altsetting != 1)
{
DBG( "invalid num_altsetting %u\n", pIntf->num_altsetting );
return -ENODEV;
}
//wangbo
// Verify correct interface (5 for SLM7xx)
if ( pIntf->cur_altsetting->desc.bInterfaceNumber != 5 )
{
DBG( "invalid interface %d\n",
pIntf->cur_altsetting->desc.bInterfaceNumber );
return -ENODEV;
}
// Collect In and Out endpoints
numEndpoints = pIntf->cur_altsetting->desc.bNumEndpoints;
for (endpointIndex = 0; endpointIndex < numEndpoints; endpointIndex++)
{
pEndpoint = pIntf->cur_altsetting->endpoint + endpointIndex;
if (pEndpoint == NULL)
{
DBG( "invalid endpoint %u\n", endpointIndex );
return -ENODEV;
}
if (usb_endpoint_dir_in( &pEndpoint->desc ) == true
&& usb_endpoint_xfer_int( &pEndpoint->desc ) == false)
{
pIn = pEndpoint;
}
else if (usb_endpoint_dir_out( &pEndpoint->desc ) == true)
{
pOut = pEndpoint;
}
}
if (pIn == NULL || pOut == NULL)
{
DBG( "invalid endpoints\n" );
return -ENODEV;
}
if (usb_set_interface( pDev->udev,
pIntf->cur_altsetting->desc.bInterfaceNumber,
0 ) != 0)
{
DBG( "unable to set interface\n" );
return -ENODEV;
}
pDev->in = usb_rcvbulkpipe( pDev->udev,
pIn->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK );
pDev->out = usb_sndbulkpipe( pDev->udev,
pOut->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK );
#if 1 //def DATA_MODE_RP
/* make MAC addr easily distinguishable from an IP header */
if ((pDev->net->dev_addr[0] & 0xd0) == 0x40) {
/*clear this bit wil make usbnet apdater named as usbX(instead if ethX)*/
pDev->net->dev_addr[0] |= 0x02; /* set local assignment bit */
pDev->net->dev_addr[0] &= 0xbf; /* clear "IP" bit */
}
#endif
DBG( "in %x, out %x\n",
pIn->desc.bEndpointAddress,
pOut->desc.bEndpointAddress );
// In later versions of the kernel, usbnet helps with this
#if (LINUX_VERSION_CODE <= KERNEL_VERSION( 2,6,23 ))
pIntf->dev.platform_data = (void *)pDev;
#endif
return 0;
}
/*===========================================================================
METHOD:
GobiNetDriverUnbind (Public Method)
DESCRIPTION:
Deregisters QMI device (Registration happened in the probe function)
PARAMETERS
pDev [ I ] - Pointer to usbnet device
pIntfUnused [ I ] - Pointer to interface
RETURN VALUE:
None
===========================================================================*/
static void GobiNetDriverUnbind(
struct usbnet * pDev,
struct usb_interface * pIntf)
{
sGobiUSBNet * pGobiDev = (sGobiUSBNet *)pDev->data[0];
// Should already be down, but just in case...
netif_carrier_off( pDev->net );
DeregisterQMIDevice( pGobiDev );
#if (LINUX_VERSION_CODE >= KERNEL_VERSION( 2,6,29 ))
kfree( pDev->net->netdev_ops );
pDev->net->netdev_ops = NULL;
#endif
#if (LINUX_VERSION_CODE <= KERNEL_VERSION( 2,6,23 ))
pIntf->dev.platform_data = NULL;
#endif
#if (LINUX_VERSION_CODE >= KERNEL_VERSION( 2,6,19 ))
pIntf->needs_remote_wakeup = 0;
#endif
if (atomic_dec_and_test(&pGobiDev->refcount))
kfree( pGobiDev );
else
DBG("memory leak!\n");
}
#if 1 //def DATA_MODE_RP
/*===========================================================================
METHOD:
GobiNetDriverTxFixup (Public Method)
DESCRIPTION:
Handling data format mode on transmit path
PARAMETERS
pDev [ I ] - Pointer to usbnet device
pSKB [ I ] - Pointer to transmit packet buffer
flags [ I ] - os flags
RETURN VALUE:
None
===========================================================================*/
struct sk_buff *GobiNetDriverTxFixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
{
sGobiUSBNet * pGobiDev = (sGobiUSBNet *)dev->data[0];
if (!pGobiDev->mbRawIPMode)
return skb;
// Skip Ethernet header from message
if (skb_pull(skb, ETH_HLEN)) {
return skb;
} else {
#if (LINUX_VERSION_CODE > KERNEL_VERSION( 2,6,22 ))
dev_err(&dev->intf->dev, "Packet Dropped ");
#elif (LINUX_VERSION_CODE > KERNEL_VERSION( 2,6,18 ))
dev_err(dev->net->dev.parent, "Packet Dropped ");
#else
INFO("Packet Dropped ");
#endif
}
//wangbo question?
// Filter the packet out, release it
dev_kfree_skb_any(skb); //usbnet.c usbnet_start_xmit() will free it
return NULL;
}
/*===========================================================================
METHOD:
GobiNetDriverRxFixup (Public Method)
DESCRIPTION:
Handling data format mode on receive path
PARAMETERS
pDev [ I ] - Pointer to usbnet device
pSKB [ I ] - Pointer to received packet buffer
RETURN VALUE:
None
===========================================================================*/
static int GobiNetDriverRxFixup(struct usbnet *dev, struct sk_buff *skb)
{
__be16 proto;
sGobiUSBNet * pGobiDev = (sGobiUSBNet *)dev->data[0];
if (!pGobiDev->mbRawIPMode)
return 1;
/* This check is no longer done by usbnet */
if (skb->len < dev->net->hard_header_len)
return 0;
switch (skb->data[0] & 0xf0) {
case 0x40:
proto = htons(ETH_P_IP);
break;
case 0x60:
proto = htons(ETH_P_IPV6);
break;
case 0x00:
if (is_multicast_ether_addr(skb->data))
return 1;
/* possibly bogus destination - rewrite just in case */
skb_reset_mac_header(skb);
goto fix_dest;
default:
/* pass along other packets without modifications */
return 1;
}
if (skb_headroom(skb) < ETH_HLEN && pskb_expand_head(skb, ETH_HLEN, 0, GFP_ATOMIC)) {
DBG("%s: couldn't pskb_expand_head\n", __func__);
return 0;
}
skb_push(skb, ETH_HLEN);
skb_reset_mac_header(skb);
eth_hdr(skb)->h_proto = proto;
memset(eth_hdr(skb)->h_source, 0, ETH_ALEN);
fix_dest:
memcpy(eth_hdr(skb)->h_dest, dev->net->dev_addr, ETH_ALEN);
return 1;
}
#endif
#if (LINUX_VERSION_CODE < KERNEL_VERSION( 2,6,29 ))
#ifdef CONFIG_PM
/*===========================================================================
METHOD:
GobiUSBNetURBCallback (Public Method)
DESCRIPTION:
Write is complete, cleanup and signal that we're ready for next packet
PARAMETERS
pURB [ I ] - Pointer to sAutoPM struct
RETURN VALUE:
None
===========================================================================*/
#if (LINUX_VERSION_CODE > KERNEL_VERSION( 2,6,18 ))
void GobiUSBNetURBCallback( struct urb * pURB )
#else
void GobiUSBNetURBCallback(struct urb *pURB, struct pt_regs *regs)
#endif
{
unsigned long activeURBflags;
sAutoPM * pAutoPM = (sAutoPM *)pURB->context;
if (pAutoPM == NULL)
{
// Should never happen
DBG( "bad context\n" );
return;
}
if (pURB->status != 0)
{
// Note that in case of an error, the behaviour is no different
DBG( "urb finished with error %d\n", pURB->status );
}
// Remove activeURB (memory to be freed later)
spin_lock_irqsave( &pAutoPM->mActiveURBLock, activeURBflags );
// EAGAIN used to signify callback is done
pAutoPM->mpActiveURB = ERR_PTR( -EAGAIN );
spin_unlock_irqrestore( &pAutoPM->mActiveURBLock, activeURBflags );
complete( &pAutoPM->mThreadDoWork );
usb_free_urb( pURB );
}
/*===========================================================================
METHOD:
GobiUSBNetTXTimeout (Public Method)
DESCRIPTION:
Timeout declared by the net driver. Stop all transfers
PARAMETERS
pNet [ I ] - Pointer to net device
RETURN VALUE:
None
===========================================================================*/
void GobiUSBNetTXTimeout( struct net_device * pNet )
{
struct sGobiUSBNet * pGobiDev;
sAutoPM * pAutoPM;
sURBList * pURBListEntry;
unsigned long activeURBflags, URBListFlags;
struct usbnet * pDev = netdev_priv( pNet );
struct urb * pURB;
if (pDev == NULL || pDev->net == NULL)
{
DBG( "failed to get usbnet device\n" );
return;
}
pGobiDev = (sGobiUSBNet *)pDev->data[0];
if (pGobiDev == NULL)
{
DBG( "failed to get QMIDevice\n" );
return;
}
pAutoPM = &pGobiDev->mAutoPM;
DBG( "\n" );
// Grab a pointer to active URB
spin_lock_irqsave( &pAutoPM->mActiveURBLock, activeURBflags );
pURB = pAutoPM->mpActiveURB;
spin_unlock_irqrestore( &pAutoPM->mActiveURBLock, activeURBflags );
// Stop active URB
if (pURB != NULL)
{
usb_kill_urb( pURB );
}
// Cleanup URB List
spin_lock_irqsave( &pAutoPM->mURBListLock, URBListFlags );
pURBListEntry = pAutoPM->mpURBList;
while (pURBListEntry != NULL)
{
pAutoPM->mpURBList = pAutoPM->mpURBList->mpNext;
atomic_dec( &pAutoPM->mURBListLen );
usb_free_urb( pURBListEntry->mpURB );
kfree( pURBListEntry );
pURBListEntry = pAutoPM->mpURBList;
}
spin_unlock_irqrestore( &pAutoPM->mURBListLock, URBListFlags );
complete( &pAutoPM->mThreadDoWork );
return;
}
/*===========================================================================
METHOD:
GobiUSBNetAutoPMThread (Public Method)
DESCRIPTION:
Handle device Auto PM state asynchronously
Handle network packet transmission asynchronously
PARAMETERS
pData [ I ] - Pointer to sAutoPM struct
RETURN VALUE:
int - 0 for success
Negative errno for error
===========================================================================*/
static int GobiUSBNetAutoPMThread( void * pData )
{
unsigned long activeURBflags, URBListFlags;
sURBList * pURBListEntry;
int status;
struct usb_device * pUdev;
sAutoPM * pAutoPM = (sAutoPM *)pData;
struct urb * pURB;
if (pAutoPM == NULL)
{
DBG( "passed null pointer\n" );
return -EINVAL;
}
pUdev = interface_to_usbdev( pAutoPM->mpIntf );
DBG( "traffic thread started\n" );
while (pAutoPM->mbExit == false)
{
// Wait for someone to poke us
wait_for_completion_interruptible( &pAutoPM->mThreadDoWork );
// Time to exit?
if (pAutoPM->mbExit == true)
{
// Stop activeURB
spin_lock_irqsave( &pAutoPM->mActiveURBLock, activeURBflags );
pURB = pAutoPM->mpActiveURB;
spin_unlock_irqrestore( &pAutoPM->mActiveURBLock, activeURBflags );
// EAGAIN used to signify callback is done
if (IS_ERR( pAutoPM->mpActiveURB )
&& PTR_ERR( pAutoPM->mpActiveURB ) == -EAGAIN )
{
pURB = NULL;
}
if (pURB != NULL)
{
usb_kill_urb( pURB );
}
// Will be freed in callback function
// Cleanup URB List
spin_lock_irqsave( &pAutoPM->mURBListLock, URBListFlags );
pURBListEntry = pAutoPM->mpURBList;
while (pURBListEntry != NULL)
{
pAutoPM->mpURBList = pAutoPM->mpURBList->mpNext;
atomic_dec( &pAutoPM->mURBListLen );
usb_free_urb( pURBListEntry->mpURB );
kfree( pURBListEntry );
pURBListEntry = pAutoPM->mpURBList;
}
spin_unlock_irqrestore( &pAutoPM->mURBListLock, URBListFlags );
break;
}
// Is our URB active?
spin_lock_irqsave( &pAutoPM->mActiveURBLock, activeURBflags );
// EAGAIN used to signify callback is done
if (IS_ERR( pAutoPM->mpActiveURB )
&& PTR_ERR( pAutoPM->mpActiveURB ) == -EAGAIN )
{
pAutoPM->mpActiveURB = NULL;
// Restore IRQs so task can sleep
spin_unlock_irqrestore( &pAutoPM->mActiveURBLock, activeURBflags );
// URB is done, decrement the Auto PM usage count
usb_autopm_put_interface( pAutoPM->mpIntf );
// Lock ActiveURB again
spin_lock_irqsave( &pAutoPM->mActiveURBLock, activeURBflags );
}
if (pAutoPM->mpActiveURB != NULL)
{
// There is already a URB active, go back to sleep
spin_unlock_irqrestore( &pAutoPM->mActiveURBLock, activeURBflags );
continue;
}
// Is there a URB waiting to be submitted?
spin_lock_irqsave( &pAutoPM->mURBListLock, URBListFlags );
if (pAutoPM->mpURBList == NULL)
{
// No more URBs to submit, go back to sleep
spin_unlock_irqrestore( &pAutoPM->mURBListLock, URBListFlags );
spin_unlock_irqrestore( &pAutoPM->mActiveURBLock, activeURBflags );
continue;
}
// Pop an element
pURBListEntry = pAutoPM->mpURBList;
pAutoPM->mpURBList = pAutoPM->mpURBList->mpNext;
atomic_dec( &pAutoPM->mURBListLen );
spin_unlock_irqrestore( &pAutoPM->mURBListLock, URBListFlags );
// Set ActiveURB
pAutoPM->mpActiveURB = pURBListEntry->mpURB;
spin_unlock_irqrestore( &pAutoPM->mActiveURBLock, activeURBflags );
// Tell autopm core we need device woken up
status = usb_autopm_get_interface( pAutoPM->mpIntf );
if (status < 0)
{
DBG( "unable to autoresume interface: %d\n", status );
// likely caused by device going from autosuspend -> full suspend
if (status == -EPERM)
{
#if (LINUX_VERSION_CODE < KERNEL_VERSION( 2,6,33 ))
#if (LINUX_VERSION_CODE > KERNEL_VERSION( 2,6,18 ))
pUdev->auto_pm = 0;
#else
pUdev = pUdev;
#endif
#endif
GobiNetSuspend( pAutoPM->mpIntf, PMSG_SUSPEND );
}
// Add pURBListEntry back onto pAutoPM->mpURBList
spin_lock_irqsave( &pAutoPM->mURBListLock, URBListFlags );
pURBListEntry->mpNext = pAutoPM->mpURBList;
pAutoPM->mpURBList = pURBListEntry;
atomic_inc( &pAutoPM->mURBListLen );
spin_unlock_irqrestore( &pAutoPM->mURBListLock, URBListFlags );
spin_lock_irqsave( &pAutoPM->mActiveURBLock, activeURBflags );
pAutoPM->mpActiveURB = NULL;
spin_unlock_irqrestore( &pAutoPM->mActiveURBLock, activeURBflags );
// Go back to sleep
continue;
}
// Submit URB
status = usb_submit_urb( pAutoPM->mpActiveURB, GFP_KERNEL );
if (status < 0)
{
// Could happen for a number of reasons
DBG( "Failed to submit URB: %d. Packet dropped\n", status );
spin_lock_irqsave( &pAutoPM->mActiveURBLock, activeURBflags );
usb_free_urb( pAutoPM->mpActiveURB );
pAutoPM->mpActiveURB = NULL;
spin_unlock_irqrestore( &pAutoPM->mActiveURBLock, activeURBflags );
usb_autopm_put_interface( pAutoPM->mpIntf );
// Loop again
complete( &pAutoPM->mThreadDoWork );
}
kfree( pURBListEntry );
}
DBG( "traffic thread exiting\n" );
pAutoPM->mpThread = NULL;
return 0;
}
/*===========================================================================
METHOD:
GobiUSBNetStartXmit (Public Method)
DESCRIPTION:
Convert sk_buff to usb URB and queue for transmit
PARAMETERS
pNet [ I ] - Pointer to net device
RETURN VALUE:
NETDEV_TX_OK on success
NETDEV_TX_BUSY on error
===========================================================================*/
int GobiUSBNetStartXmit(
struct sk_buff * pSKB,
struct net_device * pNet )
{
unsigned long URBListFlags;
struct sGobiUSBNet * pGobiDev;
sAutoPM * pAutoPM;
sURBList * pURBListEntry, ** ppURBListEnd;
void * pURBData;
struct usbnet * pDev = netdev_priv( pNet );
//DBG( "\n" );
if (pDev == NULL || pDev->net == NULL)
{
DBG( "failed to get usbnet device\n" );
return NETDEV_TX_BUSY;
}
pGobiDev = (sGobiUSBNet *)pDev->data[0];
if (pGobiDev == NULL)
{
DBG( "failed to get QMIDevice\n" );
return NETDEV_TX_BUSY;
}
pAutoPM = &pGobiDev->mAutoPM;
if( NULL == pSKB )
{
DBG( "Buffer is NULL \n" );
return NETDEV_TX_BUSY;
}
if (GobiTestDownReason( pGobiDev, DRIVER_SUSPENDED ) == true)
{
// Should not happen
DBG( "device is suspended\n" );
dump_stack();
return NETDEV_TX_BUSY;
}
if (GobiTestDownReason( pGobiDev, NO_NDIS_CONNECTION ))
{
//netif_carrier_off( pGobiDev->mpNetDev->net );
//DBG( "device is disconnected\n" );
//dump_stack();
return NETDEV_TX_BUSY;
}
// Convert the sk_buff into a URB
// Check if buffer is full
if ( atomic_read( &pAutoPM->mURBListLen ) >= txQueueLength)
{
DBG( "not scheduling request, buffer is full\n" );
return NETDEV_TX_BUSY;
}
// Allocate URBListEntry
pURBListEntry = kmalloc( sizeof( sURBList ), GFP_ATOMIC );
if (pURBListEntry == NULL)
{
DBG( "unable to allocate URBList memory\n" );
return NETDEV_TX_BUSY;
}
pURBListEntry->mpNext = NULL;
// Allocate URB
pURBListEntry->mpURB = usb_alloc_urb( 0, GFP_ATOMIC );
if (pURBListEntry->mpURB == NULL)
{
DBG( "unable to allocate URB\n" );
// release all memory allocated by now
if (pURBListEntry)
kfree( pURBListEntry );
return NETDEV_TX_BUSY;
}
//wangbo question?
#if 1 //def DATA_MODE_RP
GobiNetDriverTxFixup(pDev, pSKB, GFP_ATOMIC);
//GobiNetDriverTxFixup(pNet, pSKB, GFP_ATOMIC);
#endif
// Allocate URB transfer_buffer
pURBData = kmalloc( pSKB->len, GFP_ATOMIC );
if (pURBData == NULL)
{
DBG( "unable to allocate URB data\n" );
// release all memory allocated by now
if (pURBListEntry)
{
usb_free_urb( pURBListEntry->mpURB );
kfree( pURBListEntry );
}
return NETDEV_TX_BUSY;
}
// Fill with SKB's data
memcpy( pURBData, pSKB->data, pSKB->len );
usb_fill_bulk_urb( pURBListEntry->mpURB,
pGobiDev->mpNetDev->udev,
pGobiDev->mpNetDev->out,
pURBData,
pSKB->len,
GobiUSBNetURBCallback,
pAutoPM );
/* Handle the need to send a zero length packet and release the
* transfer buffer
*/
pURBListEntry->mpURB->transfer_flags |= (URB_ZERO_PACKET | URB_FREE_BUFFER);
// Aquire lock on URBList
spin_lock_irqsave( &pAutoPM->mURBListLock, URBListFlags );
// Add URB to end of list
ppURBListEnd = &pAutoPM->mpURBList;
while ((*ppURBListEnd) != NULL)
{
ppURBListEnd = &(*ppURBListEnd)->mpNext;
}
*ppURBListEnd = pURBListEntry;
atomic_inc( &pAutoPM->mURBListLen );
spin_unlock_irqrestore( &pAutoPM->mURBListLock, URBListFlags );
complete( &pAutoPM->mThreadDoWork );
// Start transfer timer
pNet->trans_start = jiffies;
// Free SKB
if (pSKB)
dev_kfree_skb_any( pSKB );
return NETDEV_TX_OK;
}
#endif
static int (*local_usbnet_start_xmit) (struct sk_buff *skb, struct net_device *net);
#endif
static int GobiUSBNetStartXmit2( struct sk_buff *pSKB, struct net_device *pNet ){
struct sGobiUSBNet * pGobiDev;
struct usbnet * pDev = netdev_priv( pNet );
//DBG( "\n" );
if (pDev == NULL || pDev->net == NULL)
{
DBG( "failed to get usbnet device\n" );
return NETDEV_TX_BUSY;
}
pGobiDev = (sGobiUSBNet *)pDev->data[0];
if (pGobiDev == NULL)
{
DBG( "failed to get QMIDevice\n" );
return NETDEV_TX_BUSY;
}
if( NULL == pSKB )
{
DBG( "Buffer is NULL \n" );
return NETDEV_TX_BUSY;
}
if (GobiTestDownReason( pGobiDev, DRIVER_SUSPENDED ) == true)
{
// Should not happen
DBG( "device is suspended\n" );
dump_stack();
return NETDEV_TX_BUSY;
}
if (GobiTestDownReason( pGobiDev, NO_NDIS_CONNECTION ))
{
//netif_carrier_off( pGobiDev->mpNetDev->net );
//DBG( "device is disconnected\n" );
//dump_stack();
return NETDEV_TX_BUSY;
}
#if (LINUX_VERSION_CODE < KERNEL_VERSION( 2,6,29 ))
return local_usbnet_start_xmit(pSKB, pNet);
#else