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14#include <linux/kernel.h>
15#include <linux/interrupt.h>
16#include <linux/module.h>
17#include <linux/device.h>
18#include <linux/etherdevice.h>
19#include <linux/crc32.h>
20
21#include <linux/usb/cdc.h>
22
23#include "u_ether.h"
24#include "u_ether_configfs.h"
25#include "u_ncm.h"
26#include "configfs.h"
27
28
29
30
31
32
33
34
35
36
37
38
39#define NCM_NDP_HDR_CRC 0x01000000
40
41enum ncm_notify_state {
42 NCM_NOTIFY_NONE,
43 NCM_NOTIFY_CONNECT,
44 NCM_NOTIFY_SPEED,
45};
46
47struct f_ncm {
48 struct gether port;
49 u8 ctrl_id, data_id;
50
51 char ethaddr[14];
52
53 struct usb_ep *notify;
54 struct usb_request *notify_req;
55 u8 notify_state;
56 atomic_t notify_count;
57 bool is_open;
58
59 const struct ndp_parser_opts *parser_opts;
60 bool is_crc;
61 u32 ndp_sign;
62
63
64
65
66
67 spinlock_t lock;
68
69 struct net_device *netdev;
70
71
72 struct sk_buff *skb_tx_data;
73 struct sk_buff *skb_tx_ndp;
74 u16 ndp_dgram_count;
75 bool timer_force_tx;
76 struct hrtimer task_timer;
77 bool timer_stopping;
78};
79
80static inline struct f_ncm *func_to_ncm(struct usb_function *f)
81{
82 return container_of(f, struct f_ncm, port.func);
83}
84
85
86static inline unsigned ncm_bitrate(struct usb_gadget *g)
87{
88 if (gadget_is_superspeed(g) && g->speed == USB_SPEED_SUPER)
89 return 13 * 1024 * 8 * 1000 * 8;
90 else if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
91 return 13 * 512 * 8 * 1000 * 8;
92 else
93 return 19 * 64 * 1 * 1000 * 8;
94}
95
96
97
98
99
100
101
102
103
104#define NTB_DEFAULT_IN_SIZE 16384
105#define NTB_OUT_SIZE 16384
106
107
108
109
110
111
112
113
114#define TX_MAX_NUM_DPE 32
115
116
117#define TX_TIMEOUT_NSECS 300000
118
119#define FORMATS_SUPPORTED (USB_CDC_NCM_NTB16_SUPPORTED | \
120 USB_CDC_NCM_NTB32_SUPPORTED)
121
122static struct usb_cdc_ncm_ntb_parameters ntb_parameters = {
123 .wLength = cpu_to_le16(sizeof(ntb_parameters)),
124 .bmNtbFormatsSupported = cpu_to_le16(FORMATS_SUPPORTED),
125 .dwNtbInMaxSize = cpu_to_le32(NTB_DEFAULT_IN_SIZE),
126 .wNdpInDivisor = cpu_to_le16(4),
127 .wNdpInPayloadRemainder = cpu_to_le16(0),
128 .wNdpInAlignment = cpu_to_le16(4),
129
130 .dwNtbOutMaxSize = cpu_to_le32(NTB_OUT_SIZE),
131 .wNdpOutDivisor = cpu_to_le16(4),
132 .wNdpOutPayloadRemainder = cpu_to_le16(0),
133 .wNdpOutAlignment = cpu_to_le16(4),
134};
135
136
137
138
139
140
141
142#define NCM_STATUS_INTERVAL_MS 32
143#define NCM_STATUS_BYTECOUNT 16
144
145static struct usb_interface_assoc_descriptor ncm_iad_desc = {
146 .bLength = sizeof ncm_iad_desc,
147 .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
148
149
150 .bInterfaceCount = 2,
151 .bFunctionClass = USB_CLASS_COMM,
152 .bFunctionSubClass = USB_CDC_SUBCLASS_NCM,
153 .bFunctionProtocol = USB_CDC_PROTO_NONE,
154
155};
156
157
158
159static struct usb_interface_descriptor ncm_control_intf = {
160 .bLength = sizeof ncm_control_intf,
161 .bDescriptorType = USB_DT_INTERFACE,
162
163
164 .bNumEndpoints = 1,
165 .bInterfaceClass = USB_CLASS_COMM,
166 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
167 .bInterfaceProtocol = USB_CDC_PROTO_NONE,
168
169};
170
171static struct usb_cdc_header_desc ncm_header_desc = {
172 .bLength = sizeof ncm_header_desc,
173 .bDescriptorType = USB_DT_CS_INTERFACE,
174 .bDescriptorSubType = USB_CDC_HEADER_TYPE,
175
176 .bcdCDC = cpu_to_le16(0x0110),
177};
178
179static struct usb_cdc_union_desc ncm_union_desc = {
180 .bLength = sizeof(ncm_union_desc),
181 .bDescriptorType = USB_DT_CS_INTERFACE,
182 .bDescriptorSubType = USB_CDC_UNION_TYPE,
183
184
185};
186
187static struct usb_cdc_ether_desc ecm_desc = {
188 .bLength = sizeof ecm_desc,
189 .bDescriptorType = USB_DT_CS_INTERFACE,
190 .bDescriptorSubType = USB_CDC_ETHERNET_TYPE,
191
192
193
194 .bmEthernetStatistics = cpu_to_le32(0),
195 .wMaxSegmentSize = cpu_to_le16(ETH_FRAME_LEN),
196 .wNumberMCFilters = cpu_to_le16(0),
197 .bNumberPowerFilters = 0,
198};
199
200#define NCAPS (USB_CDC_NCM_NCAP_ETH_FILTER | USB_CDC_NCM_NCAP_CRC_MODE)
201
202static struct usb_cdc_ncm_desc ncm_desc = {
203 .bLength = sizeof ncm_desc,
204 .bDescriptorType = USB_DT_CS_INTERFACE,
205 .bDescriptorSubType = USB_CDC_NCM_TYPE,
206
207 .bcdNcmVersion = cpu_to_le16(0x0100),
208
209 .bmNetworkCapabilities = NCAPS,
210};
211
212
213
214static struct usb_interface_descriptor ncm_data_nop_intf = {
215 .bLength = sizeof ncm_data_nop_intf,
216 .bDescriptorType = USB_DT_INTERFACE,
217
218 .bInterfaceNumber = 1,
219 .bAlternateSetting = 0,
220 .bNumEndpoints = 0,
221 .bInterfaceClass = USB_CLASS_CDC_DATA,
222 .bInterfaceSubClass = 0,
223 .bInterfaceProtocol = USB_CDC_NCM_PROTO_NTB,
224
225};
226
227
228
229static struct usb_interface_descriptor ncm_data_intf = {
230 .bLength = sizeof ncm_data_intf,
231 .bDescriptorType = USB_DT_INTERFACE,
232
233 .bInterfaceNumber = 1,
234 .bAlternateSetting = 1,
235 .bNumEndpoints = 2,
236 .bInterfaceClass = USB_CLASS_CDC_DATA,
237 .bInterfaceSubClass = 0,
238 .bInterfaceProtocol = USB_CDC_NCM_PROTO_NTB,
239
240};
241
242
243
244static struct usb_endpoint_descriptor fs_ncm_notify_desc = {
245 .bLength = USB_DT_ENDPOINT_SIZE,
246 .bDescriptorType = USB_DT_ENDPOINT,
247
248 .bEndpointAddress = USB_DIR_IN,
249 .bmAttributes = USB_ENDPOINT_XFER_INT,
250 .wMaxPacketSize = cpu_to_le16(NCM_STATUS_BYTECOUNT),
251 .bInterval = NCM_STATUS_INTERVAL_MS,
252};
253
254static struct usb_endpoint_descriptor fs_ncm_in_desc = {
255 .bLength = USB_DT_ENDPOINT_SIZE,
256 .bDescriptorType = USB_DT_ENDPOINT,
257
258 .bEndpointAddress = USB_DIR_IN,
259 .bmAttributes = USB_ENDPOINT_XFER_BULK,
260};
261
262static struct usb_endpoint_descriptor fs_ncm_out_desc = {
263 .bLength = USB_DT_ENDPOINT_SIZE,
264 .bDescriptorType = USB_DT_ENDPOINT,
265
266 .bEndpointAddress = USB_DIR_OUT,
267 .bmAttributes = USB_ENDPOINT_XFER_BULK,
268};
269
270static struct usb_descriptor_header *ncm_fs_function[] = {
271 (struct usb_descriptor_header *) &ncm_iad_desc,
272
273 (struct usb_descriptor_header *) &ncm_control_intf,
274 (struct usb_descriptor_header *) &ncm_header_desc,
275 (struct usb_descriptor_header *) &ncm_union_desc,
276 (struct usb_descriptor_header *) &ecm_desc,
277 (struct usb_descriptor_header *) &ncm_desc,
278 (struct usb_descriptor_header *) &fs_ncm_notify_desc,
279
280 (struct usb_descriptor_header *) &ncm_data_nop_intf,
281 (struct usb_descriptor_header *) &ncm_data_intf,
282 (struct usb_descriptor_header *) &fs_ncm_in_desc,
283 (struct usb_descriptor_header *) &fs_ncm_out_desc,
284 NULL,
285};
286
287
288
289static struct usb_endpoint_descriptor hs_ncm_notify_desc = {
290 .bLength = USB_DT_ENDPOINT_SIZE,
291 .bDescriptorType = USB_DT_ENDPOINT,
292
293 .bEndpointAddress = USB_DIR_IN,
294 .bmAttributes = USB_ENDPOINT_XFER_INT,
295 .wMaxPacketSize = cpu_to_le16(NCM_STATUS_BYTECOUNT),
296 .bInterval = USB_MS_TO_HS_INTERVAL(NCM_STATUS_INTERVAL_MS),
297};
298static struct usb_endpoint_descriptor hs_ncm_in_desc = {
299 .bLength = USB_DT_ENDPOINT_SIZE,
300 .bDescriptorType = USB_DT_ENDPOINT,
301
302 .bEndpointAddress = USB_DIR_IN,
303 .bmAttributes = USB_ENDPOINT_XFER_BULK,
304 .wMaxPacketSize = cpu_to_le16(512),
305};
306
307static struct usb_endpoint_descriptor hs_ncm_out_desc = {
308 .bLength = USB_DT_ENDPOINT_SIZE,
309 .bDescriptorType = USB_DT_ENDPOINT,
310
311 .bEndpointAddress = USB_DIR_OUT,
312 .bmAttributes = USB_ENDPOINT_XFER_BULK,
313 .wMaxPacketSize = cpu_to_le16(512),
314};
315
316static struct usb_descriptor_header *ncm_hs_function[] = {
317 (struct usb_descriptor_header *) &ncm_iad_desc,
318
319 (struct usb_descriptor_header *) &ncm_control_intf,
320 (struct usb_descriptor_header *) &ncm_header_desc,
321 (struct usb_descriptor_header *) &ncm_union_desc,
322 (struct usb_descriptor_header *) &ecm_desc,
323 (struct usb_descriptor_header *) &ncm_desc,
324 (struct usb_descriptor_header *) &hs_ncm_notify_desc,
325
326 (struct usb_descriptor_header *) &ncm_data_nop_intf,
327 (struct usb_descriptor_header *) &ncm_data_intf,
328 (struct usb_descriptor_header *) &hs_ncm_in_desc,
329 (struct usb_descriptor_header *) &hs_ncm_out_desc,
330 NULL,
331};
332
333
334
335
336static struct usb_endpoint_descriptor ss_ncm_notify_desc = {
337 .bLength = USB_DT_ENDPOINT_SIZE,
338 .bDescriptorType = USB_DT_ENDPOINT,
339
340 .bEndpointAddress = USB_DIR_IN,
341 .bmAttributes = USB_ENDPOINT_XFER_INT,
342 .wMaxPacketSize = cpu_to_le16(NCM_STATUS_BYTECOUNT),
343 .bInterval = USB_MS_TO_HS_INTERVAL(NCM_STATUS_INTERVAL_MS)
344};
345
346static struct usb_ss_ep_comp_descriptor ss_ncm_notify_comp_desc = {
347 .bLength = sizeof(ss_ncm_notify_comp_desc),
348 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
349
350
351
352
353 .wBytesPerInterval = cpu_to_le16(NCM_STATUS_BYTECOUNT),
354};
355
356static struct usb_endpoint_descriptor ss_ncm_in_desc = {
357 .bLength = USB_DT_ENDPOINT_SIZE,
358 .bDescriptorType = USB_DT_ENDPOINT,
359
360 .bEndpointAddress = USB_DIR_IN,
361 .bmAttributes = USB_ENDPOINT_XFER_BULK,
362 .wMaxPacketSize = cpu_to_le16(1024),
363};
364
365static struct usb_endpoint_descriptor ss_ncm_out_desc = {
366 .bLength = USB_DT_ENDPOINT_SIZE,
367 .bDescriptorType = USB_DT_ENDPOINT,
368
369 .bEndpointAddress = USB_DIR_OUT,
370 .bmAttributes = USB_ENDPOINT_XFER_BULK,
371 .wMaxPacketSize = cpu_to_le16(1024),
372};
373
374static struct usb_ss_ep_comp_descriptor ss_ncm_bulk_comp_desc = {
375 .bLength = sizeof(ss_ncm_bulk_comp_desc),
376 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
377
378
379
380
381};
382
383static struct usb_descriptor_header *ncm_ss_function[] = {
384 (struct usb_descriptor_header *) &ncm_iad_desc,
385
386 (struct usb_descriptor_header *) &ncm_control_intf,
387 (struct usb_descriptor_header *) &ncm_header_desc,
388 (struct usb_descriptor_header *) &ncm_union_desc,
389 (struct usb_descriptor_header *) &ecm_desc,
390 (struct usb_descriptor_header *) &ncm_desc,
391 (struct usb_descriptor_header *) &ss_ncm_notify_desc,
392 (struct usb_descriptor_header *) &ss_ncm_notify_comp_desc,
393
394 (struct usb_descriptor_header *) &ncm_data_nop_intf,
395 (struct usb_descriptor_header *) &ncm_data_intf,
396 (struct usb_descriptor_header *) &ss_ncm_in_desc,
397 (struct usb_descriptor_header *) &ss_ncm_bulk_comp_desc,
398 (struct usb_descriptor_header *) &ss_ncm_out_desc,
399 (struct usb_descriptor_header *) &ss_ncm_bulk_comp_desc,
400 NULL,
401};
402
403
404
405#define STRING_CTRL_IDX 0
406#define STRING_MAC_IDX 1
407#define STRING_DATA_IDX 2
408#define STRING_IAD_IDX 3
409
410static struct usb_string ncm_string_defs[] = {
411 [STRING_CTRL_IDX].s = "CDC Network Control Model (NCM)",
412 [STRING_MAC_IDX].s = "",
413 [STRING_DATA_IDX].s = "CDC Network Data",
414 [STRING_IAD_IDX].s = "CDC NCM",
415 { }
416};
417
418static struct usb_gadget_strings ncm_string_table = {
419 .language = 0x0409,
420 .strings = ncm_string_defs,
421};
422
423static struct usb_gadget_strings *ncm_strings[] = {
424 &ncm_string_table,
425 NULL,
426};
427
428
429
430
431
432
433
434
435
436
437struct ndp_parser_opts {
438 u32 nth_sign;
439 u32 ndp_sign;
440 unsigned nth_size;
441 unsigned ndp_size;
442 unsigned dpe_size;
443 unsigned ndplen_align;
444
445 unsigned dgram_item_len;
446 unsigned block_length;
447 unsigned ndp_index;
448 unsigned reserved1;
449 unsigned reserved2;
450 unsigned next_ndp_index;
451};
452
453#define INIT_NDP16_OPTS { \
454 .nth_sign = USB_CDC_NCM_NTH16_SIGN, \
455 .ndp_sign = USB_CDC_NCM_NDP16_NOCRC_SIGN, \
456 .nth_size = sizeof(struct usb_cdc_ncm_nth16), \
457 .ndp_size = sizeof(struct usb_cdc_ncm_ndp16), \
458 .dpe_size = sizeof(struct usb_cdc_ncm_dpe16), \
459 .ndplen_align = 4, \
460 .dgram_item_len = 1, \
461 .block_length = 1, \
462 .ndp_index = 1, \
463 .reserved1 = 0, \
464 .reserved2 = 0, \
465 .next_ndp_index = 1, \
466 }
467
468
469#define INIT_NDP32_OPTS { \
470 .nth_sign = USB_CDC_NCM_NTH32_SIGN, \
471 .ndp_sign = USB_CDC_NCM_NDP32_NOCRC_SIGN, \
472 .nth_size = sizeof(struct usb_cdc_ncm_nth32), \
473 .ndp_size = sizeof(struct usb_cdc_ncm_ndp32), \
474 .dpe_size = sizeof(struct usb_cdc_ncm_dpe32), \
475 .ndplen_align = 8, \
476 .dgram_item_len = 2, \
477 .block_length = 2, \
478 .ndp_index = 2, \
479 .reserved1 = 1, \
480 .reserved2 = 2, \
481 .next_ndp_index = 2, \
482 }
483
484static const struct ndp_parser_opts ndp16_opts = INIT_NDP16_OPTS;
485static const struct ndp_parser_opts ndp32_opts = INIT_NDP32_OPTS;
486
487static inline void put_ncm(__le16 **p, unsigned size, unsigned val)
488{
489 switch (size) {
490 case 1:
491 put_unaligned_le16((u16)val, *p);
492 break;
493 case 2:
494 put_unaligned_le32((u32)val, *p);
495
496 break;
497 default:
498 BUG();
499 }
500
501 *p += size;
502}
503
504static inline unsigned get_ncm(__le16 **p, unsigned size)
505{
506 unsigned tmp;
507
508 switch (size) {
509 case 1:
510 tmp = get_unaligned_le16(*p);
511 break;
512 case 2:
513 tmp = get_unaligned_le32(*p);
514 break;
515 default:
516 BUG();
517 }
518
519 *p += size;
520 return tmp;
521}
522
523
524
525static inline void ncm_reset_values(struct f_ncm *ncm)
526{
527 ncm->parser_opts = &ndp16_opts;
528 ncm->is_crc = false;
529 ncm->ndp_sign = ncm->parser_opts->ndp_sign;
530 ncm->port.cdc_filter = DEFAULT_FILTER;
531
532
533 ncm->port.header_len = 0;
534
535 ncm->port.fixed_out_len = le32_to_cpu(ntb_parameters.dwNtbOutMaxSize);
536 ncm->port.fixed_in_len = NTB_DEFAULT_IN_SIZE;
537}
538
539
540
541
542static void ncm_do_notify(struct f_ncm *ncm)
543{
544 struct usb_request *req = ncm->notify_req;
545 struct usb_cdc_notification *event;
546 struct usb_composite_dev *cdev = ncm->port.func.config->cdev;
547 __le32 *data;
548 int status;
549
550
551 if (atomic_read(&ncm->notify_count))
552 return;
553
554 event = req->buf;
555 switch (ncm->notify_state) {
556 case NCM_NOTIFY_NONE:
557 return;
558
559 case NCM_NOTIFY_CONNECT:
560 event->bNotificationType = USB_CDC_NOTIFY_NETWORK_CONNECTION;
561 if (ncm->is_open)
562 event->wValue = cpu_to_le16(1);
563 else
564 event->wValue = cpu_to_le16(0);
565 event->wLength = 0;
566 req->length = sizeof *event;
567
568 DBG(cdev, "notify connect %s\n",
569 ncm->is_open ? "true" : "false");
570 ncm->notify_state = NCM_NOTIFY_NONE;
571 break;
572
573 case NCM_NOTIFY_SPEED:
574 event->bNotificationType = USB_CDC_NOTIFY_SPEED_CHANGE;
575 event->wValue = cpu_to_le16(0);
576 event->wLength = cpu_to_le16(8);
577 req->length = NCM_STATUS_BYTECOUNT;
578
579
580 data = req->buf + sizeof *event;
581 data[0] = cpu_to_le32(ncm_bitrate(cdev->gadget));
582 data[1] = data[0];
583
584 DBG(cdev, "notify speed %d\n", ncm_bitrate(cdev->gadget));
585 ncm->notify_state = NCM_NOTIFY_CONNECT;
586 break;
587 }
588 event->bmRequestType = 0xA1;
589 event->wIndex = cpu_to_le16(ncm->ctrl_id);
590
591 atomic_inc(&ncm->notify_count);
592
593
594
595
596
597
598 spin_unlock(&ncm->lock);
599 status = usb_ep_queue(ncm->notify, req, GFP_ATOMIC);
600 spin_lock(&ncm->lock);
601 if (status < 0) {
602 atomic_dec(&ncm->notify_count);
603 DBG(cdev, "notify --> %d\n", status);
604 }
605}
606
607
608
609
610static void ncm_notify(struct f_ncm *ncm)
611{
612
613
614
615
616
617
618
619
620
621
622 ncm->notify_state = NCM_NOTIFY_SPEED;
623 ncm_do_notify(ncm);
624}
625
626static void ncm_notify_complete(struct usb_ep *ep, struct usb_request *req)
627{
628 struct f_ncm *ncm = req->context;
629 struct usb_composite_dev *cdev = ncm->port.func.config->cdev;
630 struct usb_cdc_notification *event = req->buf;
631
632 spin_lock(&ncm->lock);
633 switch (req->status) {
634 case 0:
635 VDBG(cdev, "Notification %02x sent\n",
636 event->bNotificationType);
637 atomic_dec(&ncm->notify_count);
638 break;
639 case -ECONNRESET:
640 case -ESHUTDOWN:
641 atomic_set(&ncm->notify_count, 0);
642 ncm->notify_state = NCM_NOTIFY_NONE;
643 break;
644 default:
645 DBG(cdev, "event %02x --> %d\n",
646 event->bNotificationType, req->status);
647 atomic_dec(&ncm->notify_count);
648 break;
649 }
650 ncm_do_notify(ncm);
651 spin_unlock(&ncm->lock);
652}
653
654static void ncm_ep0out_complete(struct usb_ep *ep, struct usb_request *req)
655{
656
657 unsigned in_size;
658 struct usb_function *f = req->context;
659 struct f_ncm *ncm = func_to_ncm(f);
660 struct usb_composite_dev *cdev = f->config->cdev;
661
662 req->context = NULL;
663 if (req->status || req->actual != req->length) {
664 DBG(cdev, "Bad control-OUT transfer\n");
665 goto invalid;
666 }
667
668 in_size = get_unaligned_le32(req->buf);
669 if (in_size < USB_CDC_NCM_NTB_MIN_IN_SIZE ||
670 in_size > le32_to_cpu(ntb_parameters.dwNtbInMaxSize)) {
671 DBG(cdev, "Got wrong INPUT SIZE (%d) from host\n", in_size);
672 goto invalid;
673 }
674
675 ncm->port.fixed_in_len = in_size;
676 VDBG(cdev, "Set NTB INPUT SIZE %d\n", in_size);
677 return;
678
679invalid:
680 usb_ep_set_halt(ep);
681 return;
682}
683
684static int ncm_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
685{
686 struct f_ncm *ncm = func_to_ncm(f);
687 struct usb_composite_dev *cdev = f->config->cdev;
688 struct usb_request *req = cdev->req;
689 int value = -EOPNOTSUPP;
690 u16 w_index = le16_to_cpu(ctrl->wIndex);
691 u16 w_value = le16_to_cpu(ctrl->wValue);
692 u16 w_length = le16_to_cpu(ctrl->wLength);
693
694
695
696
697
698 switch ((ctrl->bRequestType << 8) | ctrl->bRequest) {
699 case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
700 | USB_CDC_SET_ETHERNET_PACKET_FILTER:
701
702
703
704
705 if (w_length != 0 || w_index != ncm->ctrl_id)
706 goto invalid;
707 DBG(cdev, "packet filter %02x\n", w_value);
708
709
710
711
712
713 ncm->port.cdc_filter = w_value;
714 value = 0;
715 break;
716
717
718
719
720
721
722
723
724
725
726 case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
727 | USB_CDC_GET_NTB_PARAMETERS:
728
729 if (w_length == 0 || w_value != 0 || w_index != ncm->ctrl_id)
730 goto invalid;
731 value = w_length > sizeof ntb_parameters ?
732 sizeof ntb_parameters : w_length;
733 memcpy(req->buf, &ntb_parameters, value);
734 VDBG(cdev, "Host asked NTB parameters\n");
735 break;
736
737 case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
738 | USB_CDC_GET_NTB_INPUT_SIZE:
739
740 if (w_length < 4 || w_value != 0 || w_index != ncm->ctrl_id)
741 goto invalid;
742 put_unaligned_le32(ncm->port.fixed_in_len, req->buf);
743 value = 4;
744 VDBG(cdev, "Host asked INPUT SIZE, sending %d\n",
745 ncm->port.fixed_in_len);
746 break;
747
748 case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
749 | USB_CDC_SET_NTB_INPUT_SIZE:
750 {
751 if (w_length != 4 || w_value != 0 || w_index != ncm->ctrl_id)
752 goto invalid;
753 req->complete = ncm_ep0out_complete;
754 req->length = w_length;
755 req->context = f;
756
757 value = req->length;
758 break;
759 }
760
761 case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
762 | USB_CDC_GET_NTB_FORMAT:
763 {
764 uint16_t format;
765
766 if (w_length < 2 || w_value != 0 || w_index != ncm->ctrl_id)
767 goto invalid;
768 format = (ncm->parser_opts == &ndp16_opts) ? 0x0000 : 0x0001;
769 put_unaligned_le16(format, req->buf);
770 value = 2;
771 VDBG(cdev, "Host asked NTB FORMAT, sending %d\n", format);
772 break;
773 }
774
775 case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
776 | USB_CDC_SET_NTB_FORMAT:
777 {
778 if (w_length != 0 || w_index != ncm->ctrl_id)
779 goto invalid;
780 switch (w_value) {
781 case 0x0000:
782 ncm->parser_opts = &ndp16_opts;
783 DBG(cdev, "NCM16 selected\n");
784 break;
785 case 0x0001:
786 ncm->parser_opts = &ndp32_opts;
787 DBG(cdev, "NCM32 selected\n");
788 break;
789 default:
790 goto invalid;
791 }
792 value = 0;
793 break;
794 }
795 case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
796 | USB_CDC_GET_CRC_MODE:
797 {
798 uint16_t is_crc;
799
800 if (w_length < 2 || w_value != 0 || w_index != ncm->ctrl_id)
801 goto invalid;
802 is_crc = ncm->is_crc ? 0x0001 : 0x0000;
803 put_unaligned_le16(is_crc, req->buf);
804 value = 2;
805 VDBG(cdev, "Host asked CRC MODE, sending %d\n", is_crc);
806 break;
807 }
808
809 case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
810 | USB_CDC_SET_CRC_MODE:
811 {
812 if (w_length != 0 || w_index != ncm->ctrl_id)
813 goto invalid;
814 switch (w_value) {
815 case 0x0000:
816 ncm->is_crc = false;
817 DBG(cdev, "non-CRC mode selected\n");
818 break;
819 case 0x0001:
820 ncm->is_crc = true;
821 DBG(cdev, "CRC mode selected\n");
822 break;
823 default:
824 goto invalid;
825 }
826 value = 0;
827 break;
828 }
829
830
831
832
833
834
835
836 default:
837invalid:
838 DBG(cdev, "invalid control req%02x.%02x v%04x i%04x l%d\n",
839 ctrl->bRequestType, ctrl->bRequest,
840 w_value, w_index, w_length);
841 }
842 ncm->ndp_sign = ncm->parser_opts->ndp_sign |
843 (ncm->is_crc ? NCM_NDP_HDR_CRC : 0);
844
845
846 if (value >= 0) {
847 DBG(cdev, "ncm req%02x.%02x v%04x i%04x l%d\n",
848 ctrl->bRequestType, ctrl->bRequest,
849 w_value, w_index, w_length);
850 req->zero = 0;
851 req->length = value;
852 value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC);
853 if (value < 0)
854 ERROR(cdev, "ncm req %02x.%02x response err %d\n",
855 ctrl->bRequestType, ctrl->bRequest,
856 value);
857 }
858
859
860 return value;
861}
862
863
864static int ncm_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
865{
866 struct f_ncm *ncm = func_to_ncm(f);
867 struct usb_composite_dev *cdev = f->config->cdev;
868
869
870 if (intf == ncm->ctrl_id) {
871 if (alt != 0)
872 goto fail;
873
874 DBG(cdev, "reset ncm control %d\n", intf);
875 usb_ep_disable(ncm->notify);
876
877 if (!(ncm->notify->desc)) {
878 DBG(cdev, "init ncm ctrl %d\n", intf);
879 if (config_ep_by_speed(cdev->gadget, f, ncm->notify))
880 goto fail;
881 }
882 usb_ep_enable(ncm->notify);
883
884
885 } else if (intf == ncm->data_id) {
886 if (alt > 1)
887 goto fail;
888
889 if (ncm->port.in_ep->enabled) {
890 DBG(cdev, "reset ncm\n");
891 ncm->timer_stopping = true;
892 ncm->netdev = NULL;
893 gether_disconnect(&ncm->port);
894 ncm_reset_values(ncm);
895 }
896
897
898
899
900
901 if (alt == 1) {
902 struct net_device *net;
903
904 if (!ncm->port.in_ep->desc ||
905 !ncm->port.out_ep->desc) {
906 DBG(cdev, "init ncm\n");
907 if (config_ep_by_speed(cdev->gadget, f,
908 ncm->port.in_ep) ||
909 config_ep_by_speed(cdev->gadget, f,
910 ncm->port.out_ep)) {
911 ncm->port.in_ep->desc = NULL;
912 ncm->port.out_ep->desc = NULL;
913 goto fail;
914 }
915 }
916
917
918
919
920
921 ncm->port.is_zlp_ok =
922 gadget_is_zlp_supported(cdev->gadget);
923 ncm->port.cdc_filter = DEFAULT_FILTER;
924 DBG(cdev, "activate ncm\n");
925 net = gether_connect(&ncm->port);
926 if (IS_ERR(net))
927 return PTR_ERR(net);
928 ncm->netdev = net;
929 ncm->timer_stopping = false;
930 }
931
932 spin_lock(&ncm->lock);
933 ncm_notify(ncm);
934 spin_unlock(&ncm->lock);
935 } else
936 goto fail;
937
938 return 0;
939fail:
940 return -EINVAL;
941}
942
943
944
945
946
947static int ncm_get_alt(struct usb_function *f, unsigned intf)
948{
949 struct f_ncm *ncm = func_to_ncm(f);
950
951 if (intf == ncm->ctrl_id)
952 return 0;
953 return ncm->port.in_ep->enabled ? 1 : 0;
954}
955
956static struct sk_buff *package_for_tx(struct f_ncm *ncm)
957{
958 __le16 *ntb_iter;
959 struct sk_buff *skb2 = NULL;
960 unsigned ndp_pad;
961 unsigned ndp_index;
962 unsigned new_len;
963
964 const struct ndp_parser_opts *opts = ncm->parser_opts;
965 const int ndp_align = le16_to_cpu(ntb_parameters.wNdpInAlignment);
966 const int dgram_idx_len = 2 * 2 * opts->dgram_item_len;
967
968
969 hrtimer_try_to_cancel(&ncm->task_timer);
970
971 ndp_pad = ALIGN(ncm->skb_tx_data->len, ndp_align) -
972 ncm->skb_tx_data->len;
973 ndp_index = ncm->skb_tx_data->len + ndp_pad;
974 new_len = ndp_index + dgram_idx_len + ncm->skb_tx_ndp->len;
975
976
977 ntb_iter = (void *) ncm->skb_tx_data->data;
978
979 ntb_iter += 2 + 1 + 1;
980 put_ncm(&ntb_iter, opts->block_length, new_len);
981 put_ncm(&ntb_iter, opts->ndp_index, ndp_index);
982
983
984 new_len = opts->ndp_size +
985 (ncm->ndp_dgram_count * dgram_idx_len);
986 ncm->ndp_dgram_count = 0;
987
988 ntb_iter = (void *) ncm->skb_tx_ndp->data;
989 ntb_iter += 2;
990 put_unaligned_le16(new_len, ntb_iter);
991
992
993 swap(skb2, ncm->skb_tx_data);
994 if (ncm->skb_tx_data) {
995 dev_consume_skb_any(ncm->skb_tx_data);
996 ncm->skb_tx_data = NULL;
997 }
998
999
1000 skb_put_zero(skb2, ndp_pad);
1001
1002
1003 skb_put_data(skb2, ncm->skb_tx_ndp->data, ncm->skb_tx_ndp->len);
1004 dev_consume_skb_any(ncm->skb_tx_ndp);
1005 ncm->skb_tx_ndp = NULL;
1006
1007
1008 skb_put_zero(skb2, dgram_idx_len);
1009
1010 return skb2;
1011}
1012
1013static struct sk_buff *ncm_wrap_ntb(struct gether *port,
1014 struct sk_buff *skb)
1015{
1016 struct f_ncm *ncm = func_to_ncm(&port->func);
1017 struct sk_buff *skb2 = NULL;
1018 int ncb_len = 0;
1019 __le16 *ntb_data;
1020 __le16 *ntb_ndp;
1021 int dgram_pad;
1022
1023 unsigned max_size = ncm->port.fixed_in_len;
1024 const struct ndp_parser_opts *opts = ncm->parser_opts;
1025 const int ndp_align = le16_to_cpu(ntb_parameters.wNdpInAlignment);
1026 const int div = le16_to_cpu(ntb_parameters.wNdpInDivisor);
1027 const int rem = le16_to_cpu(ntb_parameters.wNdpInPayloadRemainder);
1028 const int dgram_idx_len = 2 * 2 * opts->dgram_item_len;
1029
1030 if (!skb && !ncm->skb_tx_data)
1031 return NULL;
1032
1033 if (skb) {
1034
1035 if (ncm->is_crc) {
1036 uint32_t crc;
1037 __le16 *crc_pos;
1038
1039 crc = ~crc32_le(~0,
1040 skb->data,
1041 skb->len);
1042 crc_pos = skb_put(skb, sizeof(uint32_t));
1043 put_unaligned_le32(crc, crc_pos);
1044 }
1045
1046
1047
1048
1049
1050
1051 if (ncm->skb_tx_data
1052 && (ncm->ndp_dgram_count >= TX_MAX_NUM_DPE
1053 || (ncm->skb_tx_data->len +
1054 div + rem + skb->len +
1055 ncm->skb_tx_ndp->len + ndp_align + (2 * dgram_idx_len))
1056 > max_size)) {
1057 skb2 = package_for_tx(ncm);
1058 if (!skb2)
1059 goto err;
1060 }
1061
1062 if (!ncm->skb_tx_data) {
1063 ncb_len = opts->nth_size;
1064 dgram_pad = ALIGN(ncb_len, div) + rem - ncb_len;
1065 ncb_len += dgram_pad;
1066
1067
1068 ncm->skb_tx_data = alloc_skb(max_size, GFP_ATOMIC);
1069 if (!ncm->skb_tx_data)
1070 goto err;
1071
1072 ncm->skb_tx_data->dev = ncm->netdev;
1073 ntb_data = skb_put_zero(ncm->skb_tx_data, ncb_len);
1074
1075 put_unaligned_le32(opts->nth_sign, ntb_data);
1076 ntb_data += 2;
1077
1078 put_unaligned_le16(opts->nth_size, ntb_data++);
1079
1080
1081
1082
1083
1084 ncm->skb_tx_ndp = alloc_skb((int)(opts->ndp_size
1085 + opts->dpe_size
1086 * TX_MAX_NUM_DPE),
1087 GFP_ATOMIC);
1088 if (!ncm->skb_tx_ndp)
1089 goto err;
1090
1091 ncm->skb_tx_ndp->dev = ncm->netdev;
1092 ntb_ndp = skb_put(ncm->skb_tx_ndp, opts->ndp_size);
1093 memset(ntb_ndp, 0, ncb_len);
1094
1095 put_unaligned_le32(ncm->ndp_sign, ntb_ndp);
1096 ntb_ndp += 2;
1097
1098
1099 ncm->ndp_dgram_count = 1;
1100
1101
1102 }
1103
1104
1105 hrtimer_start(&ncm->task_timer, TX_TIMEOUT_NSECS,
1106 HRTIMER_MODE_REL_SOFT);
1107
1108
1109 ntb_ndp = skb_put_zero(ncm->skb_tx_ndp, dgram_idx_len);
1110
1111 ncb_len = ncm->skb_tx_data->len;
1112 dgram_pad = ALIGN(ncb_len, div) + rem - ncb_len;
1113 ncb_len += dgram_pad;
1114
1115
1116 put_ncm(&ntb_ndp, opts->dgram_item_len, ncb_len);
1117
1118 put_ncm(&ntb_ndp, opts->dgram_item_len, skb->len);
1119 ncm->ndp_dgram_count++;
1120
1121
1122 skb_put_zero(ncm->skb_tx_data, dgram_pad);
1123 skb_put_data(ncm->skb_tx_data, skb->data, skb->len);
1124 dev_consume_skb_any(skb);
1125 skb = NULL;
1126
1127 } else if (ncm->skb_tx_data && ncm->timer_force_tx) {
1128
1129 skb2 = package_for_tx(ncm);
1130 if (!skb2)
1131 goto err;
1132 }
1133
1134 return skb2;
1135
1136err:
1137 ncm->netdev->stats.tx_dropped++;
1138
1139 if (skb)
1140 dev_kfree_skb_any(skb);
1141 if (ncm->skb_tx_data)
1142 dev_kfree_skb_any(ncm->skb_tx_data);
1143 if (ncm->skb_tx_ndp)
1144 dev_kfree_skb_any(ncm->skb_tx_ndp);
1145
1146 return NULL;
1147}
1148
1149
1150
1151
1152
1153static enum hrtimer_restart ncm_tx_timeout(struct hrtimer *data)
1154{
1155 struct f_ncm *ncm = container_of(data, struct f_ncm, task_timer);
1156
1157
1158 if (!ncm->timer_stopping && ncm->skb_tx_data) {
1159 ncm->timer_force_tx = true;
1160
1161
1162
1163
1164
1165
1166
1167 ncm->netdev->netdev_ops->ndo_start_xmit(NULL, ncm->netdev);
1168
1169 ncm->timer_force_tx = false;
1170 }
1171 return HRTIMER_NORESTART;
1172}
1173
1174static int ncm_unwrap_ntb(struct gether *port,
1175 struct sk_buff *skb,
1176 struct sk_buff_head *list)
1177{
1178 struct f_ncm *ncm = func_to_ncm(&port->func);
1179 __le16 *tmp = (void *) skb->data;
1180 unsigned index, index2;
1181 int ndp_index;
1182 unsigned dg_len, dg_len2;
1183 unsigned ndp_len;
1184 unsigned block_len;
1185 struct sk_buff *skb2;
1186 int ret = -EINVAL;
1187 unsigned ntb_max = le32_to_cpu(ntb_parameters.dwNtbOutMaxSize);
1188 unsigned frame_max = le16_to_cpu(ecm_desc.wMaxSegmentSize);
1189 const struct ndp_parser_opts *opts = ncm->parser_opts;
1190 unsigned crc_len = ncm->is_crc ? sizeof(uint32_t) : 0;
1191 int dgram_counter;
1192
1193
1194 if (get_unaligned_le32(tmp) != opts->nth_sign) {
1195 INFO(port->func.config->cdev, "Wrong NTH SIGN, skblen %d\n",
1196 skb->len);
1197 print_hex_dump(KERN_INFO, "HEAD:", DUMP_PREFIX_ADDRESS, 32, 1,
1198 skb->data, 32, false);
1199
1200 goto err;
1201 }
1202 tmp += 2;
1203
1204 if (get_unaligned_le16(tmp++) != opts->nth_size) {
1205 INFO(port->func.config->cdev, "Wrong NTB headersize\n");
1206 goto err;
1207 }
1208 tmp++;
1209
1210 block_len = get_ncm(&tmp, opts->block_length);
1211
1212 if (block_len > ntb_max) {
1213 INFO(port->func.config->cdev, "OUT size exceeded\n");
1214 goto err;
1215 }
1216
1217 ndp_index = get_ncm(&tmp, opts->ndp_index);
1218
1219
1220 do {
1221
1222
1223
1224
1225 if (((ndp_index % 4) != 0) ||
1226 (ndp_index < opts->nth_size) ||
1227 (ndp_index > (block_len -
1228 opts->ndp_size))) {
1229 INFO(port->func.config->cdev, "Bad index: %#X\n",
1230 ndp_index);
1231 goto err;
1232 }
1233
1234
1235
1236
1237
1238 tmp = (void *)(skb->data + ndp_index);
1239 if (get_unaligned_le32(tmp) != ncm->ndp_sign) {
1240 INFO(port->func.config->cdev, "Wrong NDP SIGN\n");
1241 goto err;
1242 }
1243 tmp += 2;
1244
1245 ndp_len = get_unaligned_le16(tmp++);
1246
1247
1248
1249
1250
1251
1252
1253
1254 if ((ndp_len < opts->ndp_size
1255 + 2 * 2 * (opts->dgram_item_len * 2)) ||
1256 (ndp_len % opts->ndplen_align != 0)) {
1257 INFO(port->func.config->cdev, "Bad NDP length: %#X\n",
1258 ndp_len);
1259 goto err;
1260 }
1261 tmp += opts->reserved1;
1262
1263 ndp_index = get_ncm(&tmp, opts->next_ndp_index);
1264 tmp += opts->reserved2;
1265
1266 ndp_len -= opts->ndp_size;
1267 index2 = get_ncm(&tmp, opts->dgram_item_len);
1268 dg_len2 = get_ncm(&tmp, opts->dgram_item_len);
1269 dgram_counter = 0;
1270
1271 do {
1272 index = index2;
1273
1274 if ((index < opts->nth_size) ||
1275 (index > block_len - opts->dpe_size)) {
1276 INFO(port->func.config->cdev,
1277 "Bad index: %#X\n", index);
1278 goto err;
1279 }
1280
1281 dg_len = dg_len2;
1282
1283
1284
1285
1286 if ((dg_len < 14 + crc_len) ||
1287 (dg_len > frame_max)) {
1288 INFO(port->func.config->cdev,
1289 "Bad dgram length: %#X\n", dg_len);
1290 goto err;
1291 }
1292 if (ncm->is_crc) {
1293 uint32_t crc, crc2;
1294
1295 crc = get_unaligned_le32(skb->data +
1296 index + dg_len -
1297 crc_len);
1298 crc2 = ~crc32_le(~0,
1299 skb->data + index,
1300 dg_len - crc_len);
1301 if (crc != crc2) {
1302 INFO(port->func.config->cdev,
1303 "Bad CRC\n");
1304 goto err;
1305 }
1306 }
1307
1308 index2 = get_ncm(&tmp, opts->dgram_item_len);
1309 dg_len2 = get_ncm(&tmp, opts->dgram_item_len);
1310
1311
1312 if (index2 > block_len - opts->dpe_size) {
1313 INFO(port->func.config->cdev,
1314 "Bad index: %#X\n", index2);
1315 goto err;
1316 }
1317
1318
1319
1320
1321
1322 skb2 = netdev_alloc_skb_ip_align(ncm->netdev,
1323 dg_len - crc_len);
1324 if (skb2 == NULL)
1325 goto err;
1326 skb_put_data(skb2, skb->data + index,
1327 dg_len - crc_len);
1328
1329 skb_queue_tail(list, skb2);
1330
1331 ndp_len -= 2 * (opts->dgram_item_len * 2);
1332
1333 dgram_counter++;
1334 if (index2 == 0 || dg_len2 == 0)
1335 break;
1336 } while (ndp_len > 2 * (opts->dgram_item_len * 2));
1337 } while (ndp_index);
1338
1339 dev_consume_skb_any(skb);
1340
1341 VDBG(port->func.config->cdev,
1342 "Parsed NTB with %d frames\n", dgram_counter);
1343 return 0;
1344err:
1345 skb_queue_purge(list);
1346 dev_kfree_skb_any(skb);
1347 return ret;
1348}
1349
1350static void ncm_disable(struct usb_function *f)
1351{
1352 struct f_ncm *ncm = func_to_ncm(f);
1353 struct usb_composite_dev *cdev = f->config->cdev;
1354
1355 DBG(cdev, "ncm deactivated\n");
1356
1357 if (ncm->port.in_ep->enabled) {
1358 ncm->timer_stopping = true;
1359 ncm->netdev = NULL;
1360 gether_disconnect(&ncm->port);
1361 }
1362
1363 if (ncm->notify->enabled) {
1364 usb_ep_disable(ncm->notify);
1365 ncm->notify->desc = NULL;
1366 }
1367}
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389static void ncm_open(struct gether *geth)
1390{
1391 struct f_ncm *ncm = func_to_ncm(&geth->func);
1392
1393 DBG(ncm->port.func.config->cdev, "%s\n", __func__);
1394
1395 spin_lock(&ncm->lock);
1396 ncm->is_open = true;
1397 ncm_notify(ncm);
1398 spin_unlock(&ncm->lock);
1399}
1400
1401static void ncm_close(struct gether *geth)
1402{
1403 struct f_ncm *ncm = func_to_ncm(&geth->func);
1404
1405 DBG(ncm->port.func.config->cdev, "%s\n", __func__);
1406
1407 spin_lock(&ncm->lock);
1408 ncm->is_open = false;
1409 ncm_notify(ncm);
1410 spin_unlock(&ncm->lock);
1411}
1412
1413
1414
1415
1416
1417static int ncm_bind(struct usb_configuration *c, struct usb_function *f)
1418{
1419 struct usb_composite_dev *cdev = c->cdev;
1420 struct f_ncm *ncm = func_to_ncm(f);
1421 struct usb_string *us;
1422 int status;
1423 struct usb_ep *ep;
1424 struct f_ncm_opts *ncm_opts;
1425
1426 if (!can_support_ecm(cdev->gadget))
1427 return -EINVAL;
1428
1429 ncm_opts = container_of(f->fi, struct f_ncm_opts, func_inst);
1430
1431 if (cdev->use_os_string) {
1432 f->os_desc_table = kzalloc(sizeof(*f->os_desc_table),
1433 GFP_KERNEL);
1434 if (!f->os_desc_table)
1435 return -ENOMEM;
1436 f->os_desc_n = 1;
1437 f->os_desc_table[0].os_desc = &ncm_opts->ncm_os_desc;
1438 }
1439
1440
1441
1442
1443
1444
1445
1446
1447 if (!ncm_opts->bound) {
1448 mutex_lock(&ncm_opts->lock);
1449 gether_set_gadget(ncm_opts->net, cdev->gadget);
1450 status = gether_register_netdev(ncm_opts->net);
1451 mutex_unlock(&ncm_opts->lock);
1452 if (status)
1453 goto fail;
1454 ncm_opts->bound = true;
1455 }
1456 us = usb_gstrings_attach(cdev, ncm_strings,
1457 ARRAY_SIZE(ncm_string_defs));
1458 if (IS_ERR(us)) {
1459 status = PTR_ERR(us);
1460 goto fail;
1461 }
1462 ncm_control_intf.iInterface = us[STRING_CTRL_IDX].id;
1463 ncm_data_nop_intf.iInterface = us[STRING_DATA_IDX].id;
1464 ncm_data_intf.iInterface = us[STRING_DATA_IDX].id;
1465 ecm_desc.iMACAddress = us[STRING_MAC_IDX].id;
1466 ncm_iad_desc.iFunction = us[STRING_IAD_IDX].id;
1467
1468
1469 status = usb_interface_id(c, f);
1470 if (status < 0)
1471 goto fail;
1472 ncm->ctrl_id = status;
1473 ncm_iad_desc.bFirstInterface = status;
1474
1475 ncm_control_intf.bInterfaceNumber = status;
1476 ncm_union_desc.bMasterInterface0 = status;
1477
1478 if (cdev->use_os_string)
1479 f->os_desc_table[0].if_id =
1480 ncm_iad_desc.bFirstInterface;
1481
1482 status = usb_interface_id(c, f);
1483 if (status < 0)
1484 goto fail;
1485 ncm->data_id = status;
1486
1487 ncm_data_nop_intf.bInterfaceNumber = status;
1488 ncm_data_intf.bInterfaceNumber = status;
1489 ncm_union_desc.bSlaveInterface0 = status;
1490
1491 status = -ENODEV;
1492
1493
1494 ep = usb_ep_autoconfig(cdev->gadget, &fs_ncm_in_desc);
1495 if (!ep)
1496 goto fail;
1497 ncm->port.in_ep = ep;
1498
1499 ep = usb_ep_autoconfig(cdev->gadget, &fs_ncm_out_desc);
1500 if (!ep)
1501 goto fail;
1502 ncm->port.out_ep = ep;
1503
1504 ep = usb_ep_autoconfig(cdev->gadget, &fs_ncm_notify_desc);
1505 if (!ep)
1506 goto fail;
1507 ncm->notify = ep;
1508
1509 status = -ENOMEM;
1510
1511
1512 ncm->notify_req = usb_ep_alloc_request(ep, GFP_KERNEL);
1513 if (!ncm->notify_req)
1514 goto fail;
1515 ncm->notify_req->buf = kmalloc(NCM_STATUS_BYTECOUNT, GFP_KERNEL);
1516 if (!ncm->notify_req->buf)
1517 goto fail;
1518 ncm->notify_req->context = ncm;
1519 ncm->notify_req->complete = ncm_notify_complete;
1520
1521
1522
1523
1524
1525
1526 hs_ncm_in_desc.bEndpointAddress = fs_ncm_in_desc.bEndpointAddress;
1527 hs_ncm_out_desc.bEndpointAddress = fs_ncm_out_desc.bEndpointAddress;
1528 hs_ncm_notify_desc.bEndpointAddress =
1529 fs_ncm_notify_desc.bEndpointAddress;
1530
1531 ss_ncm_in_desc.bEndpointAddress = fs_ncm_in_desc.bEndpointAddress;
1532 ss_ncm_out_desc.bEndpointAddress = fs_ncm_out_desc.bEndpointAddress;
1533 ss_ncm_notify_desc.bEndpointAddress =
1534 fs_ncm_notify_desc.bEndpointAddress;
1535
1536 status = usb_assign_descriptors(f, ncm_fs_function, ncm_hs_function,
1537 ncm_ss_function, NULL);
1538 if (status)
1539 goto fail;
1540
1541
1542
1543
1544
1545
1546
1547 ncm->port.open = ncm_open;
1548 ncm->port.close = ncm_close;
1549
1550 hrtimer_init(&ncm->task_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL_SOFT);
1551 ncm->task_timer.function = ncm_tx_timeout;
1552
1553 DBG(cdev, "CDC Network: %s speed IN/%s OUT/%s NOTIFY/%s\n",
1554 gadget_is_superspeed(c->cdev->gadget) ? "super" :
1555 gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",
1556 ncm->port.in_ep->name, ncm->port.out_ep->name,
1557 ncm->notify->name);
1558 return 0;
1559
1560fail:
1561 kfree(f->os_desc_table);
1562 f->os_desc_n = 0;
1563
1564 if (ncm->notify_req) {
1565 kfree(ncm->notify_req->buf);
1566 usb_ep_free_request(ncm->notify, ncm->notify_req);
1567 }
1568
1569 ERROR(cdev, "%s: can't bind, err %d\n", f->name, status);
1570
1571 return status;
1572}
1573
1574static inline struct f_ncm_opts *to_f_ncm_opts(struct config_item *item)
1575{
1576 return container_of(to_config_group(item), struct f_ncm_opts,
1577 func_inst.group);
1578}
1579
1580
1581USB_ETHERNET_CONFIGFS_ITEM(ncm);
1582
1583
1584USB_ETHERNET_CONFIGFS_ITEM_ATTR_DEV_ADDR(ncm);
1585
1586
1587USB_ETHERNET_CONFIGFS_ITEM_ATTR_HOST_ADDR(ncm);
1588
1589
1590USB_ETHERNET_CONFIGFS_ITEM_ATTR_QMULT(ncm);
1591
1592
1593USB_ETHERNET_CONFIGFS_ITEM_ATTR_IFNAME(ncm);
1594
1595static struct configfs_attribute *ncm_attrs[] = {
1596 &ncm_opts_attr_dev_addr,
1597 &ncm_opts_attr_host_addr,
1598 &ncm_opts_attr_qmult,
1599 &ncm_opts_attr_ifname,
1600 NULL,
1601};
1602
1603static const struct config_item_type ncm_func_type = {
1604 .ct_item_ops = &ncm_item_ops,
1605 .ct_attrs = ncm_attrs,
1606 .ct_owner = THIS_MODULE,
1607};
1608
1609static void ncm_free_inst(struct usb_function_instance *f)
1610{
1611 struct f_ncm_opts *opts;
1612
1613 opts = container_of(f, struct f_ncm_opts, func_inst);
1614 if (opts->bound)
1615 gether_cleanup(netdev_priv(opts->net));
1616 else
1617 free_netdev(opts->net);
1618 kfree(opts->ncm_interf_group);
1619 kfree(opts);
1620}
1621
1622static struct usb_function_instance *ncm_alloc_inst(void)
1623{
1624 struct f_ncm_opts *opts;
1625 struct usb_os_desc *descs[1];
1626 char *names[1];
1627 struct config_group *ncm_interf_group;
1628
1629 opts = kzalloc(sizeof(*opts), GFP_KERNEL);
1630 if (!opts)
1631 return ERR_PTR(-ENOMEM);
1632 opts->ncm_os_desc.ext_compat_id = opts->ncm_ext_compat_id;
1633
1634 mutex_init(&opts->lock);
1635 opts->func_inst.free_func_inst = ncm_free_inst;
1636 opts->net = gether_setup_default();
1637 if (IS_ERR(opts->net)) {
1638 struct net_device *net = opts->net;
1639 kfree(opts);
1640 return ERR_CAST(net);
1641 }
1642 INIT_LIST_HEAD(&opts->ncm_os_desc.ext_prop);
1643
1644 descs[0] = &opts->ncm_os_desc;
1645 names[0] = "ncm";
1646
1647 config_group_init_type_name(&opts->func_inst.group, "", &ncm_func_type);
1648 ncm_interf_group =
1649 usb_os_desc_prepare_interf_dir(&opts->func_inst.group, 1, descs,
1650 names, THIS_MODULE);
1651 if (IS_ERR(ncm_interf_group)) {
1652 ncm_free_inst(&opts->func_inst);
1653 return ERR_CAST(ncm_interf_group);
1654 }
1655 opts->ncm_interf_group = ncm_interf_group;
1656
1657 return &opts->func_inst;
1658}
1659
1660static void ncm_free(struct usb_function *f)
1661{
1662 struct f_ncm *ncm;
1663 struct f_ncm_opts *opts;
1664
1665 ncm = func_to_ncm(f);
1666 opts = container_of(f->fi, struct f_ncm_opts, func_inst);
1667 kfree(ncm);
1668 mutex_lock(&opts->lock);
1669 opts->refcnt--;
1670 mutex_unlock(&opts->lock);
1671}
1672
1673static void ncm_unbind(struct usb_configuration *c, struct usb_function *f)
1674{
1675 struct f_ncm *ncm = func_to_ncm(f);
1676
1677 DBG(c->cdev, "ncm unbind\n");
1678
1679 hrtimer_cancel(&ncm->task_timer);
1680
1681 kfree(f->os_desc_table);
1682 f->os_desc_n = 0;
1683
1684 ncm_string_defs[0].id = 0;
1685 usb_free_all_descriptors(f);
1686
1687 if (atomic_read(&ncm->notify_count)) {
1688 usb_ep_dequeue(ncm->notify, ncm->notify_req);
1689 atomic_set(&ncm->notify_count, 0);
1690 }
1691
1692 kfree(ncm->notify_req->buf);
1693 usb_ep_free_request(ncm->notify, ncm->notify_req);
1694}
1695
1696static struct usb_function *ncm_alloc(struct usb_function_instance *fi)
1697{
1698 struct f_ncm *ncm;
1699 struct f_ncm_opts *opts;
1700 int status;
1701
1702
1703 ncm = kzalloc(sizeof(*ncm), GFP_KERNEL);
1704 if (!ncm)
1705 return ERR_PTR(-ENOMEM);
1706
1707 opts = container_of(fi, struct f_ncm_opts, func_inst);
1708 mutex_lock(&opts->lock);
1709 opts->refcnt++;
1710
1711
1712 status = gether_get_host_addr_cdc(opts->net, ncm->ethaddr,
1713 sizeof(ncm->ethaddr));
1714 if (status < 12) {
1715 kfree(ncm);
1716 mutex_unlock(&opts->lock);
1717 return ERR_PTR(-EINVAL);
1718 }
1719 ncm_string_defs[STRING_MAC_IDX].s = ncm->ethaddr;
1720
1721 spin_lock_init(&ncm->lock);
1722 ncm_reset_values(ncm);
1723 ncm->port.ioport = netdev_priv(opts->net);
1724 mutex_unlock(&opts->lock);
1725 ncm->port.is_fixed = true;
1726 ncm->port.supports_multi_frame = true;
1727
1728 ncm->port.func.name = "cdc_network";
1729
1730 ncm->port.func.bind = ncm_bind;
1731 ncm->port.func.unbind = ncm_unbind;
1732 ncm->port.func.set_alt = ncm_set_alt;
1733 ncm->port.func.get_alt = ncm_get_alt;
1734 ncm->port.func.setup = ncm_setup;
1735 ncm->port.func.disable = ncm_disable;
1736 ncm->port.func.free_func = ncm_free;
1737
1738 ncm->port.wrap = ncm_wrap_ntb;
1739 ncm->port.unwrap = ncm_unwrap_ntb;
1740
1741 return &ncm->port.func;
1742}
1743
1744DECLARE_USB_FUNCTION_INIT(ncm, ncm_alloc_inst, ncm_alloc);
1745MODULE_LICENSE("GPL");
1746MODULE_AUTHOR("Yauheni Kaliuta");
1747