1
2
3
4#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
5
6#include <linux/etherdevice.h>
7#include <linux/ip.h>
8#include <linux/ipv6.h>
9#include <linux/udp.h>
10#include <linux/in.h>
11#include <linux/if_arp.h>
12#include <linux/if_ether.h>
13#include <linux/if_vlan.h>
14#include <linux/in6.h>
15#include <linux/tcp.h>
16#include <linux/icmp.h>
17#include <linux/icmpv6.h>
18#include <linux/uaccess.h>
19#include <linux/errno.h>
20#include <net/ndisc.h>
21
22#include "gdm_lte.h"
23#include "netlink_k.h"
24#include "hci.h"
25#include "hci_packet.h"
26#include "gdm_endian.h"
27
28
29
30
31#define NETLINK_LTE 30
32
33
34
35
36#define DEFAULT_MTU_SIZE 1500
37
38#define IP_VERSION_4 4
39#define IP_VERSION_6 6
40
41static struct {
42 int ref_cnt;
43 struct sock *sock;
44} lte_event;
45
46static struct device_type wwan_type = {
47 .name = "wwan",
48};
49
50static int gdm_lte_open(struct net_device *dev)
51{
52 netif_start_queue(dev);
53 return 0;
54}
55
56static int gdm_lte_close(struct net_device *dev)
57{
58 netif_stop_queue(dev);
59 return 0;
60}
61
62static int gdm_lte_set_config(struct net_device *dev, struct ifmap *map)
63{
64 if (dev->flags & IFF_UP)
65 return -EBUSY;
66 return 0;
67}
68
69static void tx_complete(void *arg)
70{
71 struct nic *nic = arg;
72
73 if (netif_queue_stopped(nic->netdev))
74 netif_wake_queue(nic->netdev);
75}
76
77static int gdm_lte_rx(struct sk_buff *skb, struct nic *nic, int nic_type)
78{
79 int ret;
80
81 ret = netif_rx_ni(skb);
82 if (ret == NET_RX_DROP) {
83 nic->stats.rx_dropped++;
84 } else {
85 nic->stats.rx_packets++;
86 nic->stats.rx_bytes += skb->len + ETH_HLEN;
87 }
88
89 return 0;
90}
91
92static int gdm_lte_emulate_arp(struct sk_buff *skb_in, u32 nic_type)
93{
94 struct nic *nic = netdev_priv(skb_in->dev);
95 struct sk_buff *skb_out;
96 struct ethhdr eth;
97 struct vlan_ethhdr vlan_eth;
98 struct arphdr *arp_in;
99 struct arphdr *arp_out;
100 struct arpdata {
101 u8 ar_sha[ETH_ALEN];
102 u8 ar_sip[4];
103 u8 ar_tha[ETH_ALEN];
104 u8 ar_tip[4];
105 };
106 struct arpdata *arp_data_in;
107 struct arpdata *arp_data_out;
108 u8 arp_temp[60];
109 void *mac_header_data;
110 u32 mac_header_len;
111
112
113 if (skb_in->len == 0)
114 return -ENODATA;
115
116
117 if (ntohs(((struct ethhdr *)skb_in->data)->h_proto) == ETH_P_8021Q) {
118 memcpy(&vlan_eth, skb_in->data, sizeof(struct vlan_ethhdr));
119 mac_header_data = &vlan_eth;
120 mac_header_len = VLAN_ETH_HLEN;
121 } else {
122 memcpy(ð, skb_in->data, sizeof(struct ethhdr));
123 mac_header_data = ð
124 mac_header_len = ETH_HLEN;
125 }
126
127
128 arp_in = (struct arphdr *)(skb_in->data + mac_header_len);
129 arp_data_in = (struct arpdata *)(skb_in->data + mac_header_len +
130 sizeof(struct arphdr));
131
132
133 arp_out = (struct arphdr *)arp_temp;
134 arp_data_out = (struct arpdata *)(arp_temp + sizeof(struct arphdr));
135
136
137 memcpy(arp_out, arp_in, sizeof(struct arphdr));
138 arp_out->ar_op = htons(ARPOP_REPLY);
139
140
141 arp_data_out->ar_sha[0] = arp_data_in->ar_sha[0];
142 arp_data_out->ar_sha[1] = arp_data_in->ar_sha[1];
143 memcpy(&arp_data_out->ar_sha[2], &arp_data_in->ar_tip[0], 4);
144 memcpy(&arp_data_out->ar_sip[0], &arp_data_in->ar_tip[0], 4);
145 memcpy(&arp_data_out->ar_tha[0], &arp_data_in->ar_sha[0], 6);
146 memcpy(&arp_data_out->ar_tip[0], &arp_data_in->ar_sip[0], 4);
147
148
149 memcpy(mac_header_data, mac_header_data + ETH_ALEN, ETH_ALEN);
150
151 memcpy(mac_header_data + ETH_ALEN, nic->src_mac_addr, ETH_ALEN);
152
153
154 skb_out = dev_alloc_skb(skb_in->len);
155 if (!skb_out)
156 return -ENOMEM;
157 skb_reserve(skb_out, NET_IP_ALIGN);
158
159 skb_put_data(skb_out, mac_header_data, mac_header_len);
160 skb_put_data(skb_out, arp_out, sizeof(struct arphdr));
161 skb_put_data(skb_out, arp_data_out, sizeof(struct arpdata));
162
163 skb_out->protocol = ((struct ethhdr *)mac_header_data)->h_proto;
164 skb_out->dev = skb_in->dev;
165 skb_reset_mac_header(skb_out);
166 skb_pull(skb_out, ETH_HLEN);
167
168 gdm_lte_rx(skb_out, nic, nic_type);
169
170 return 0;
171}
172
173static __sum16 icmp6_checksum(struct ipv6hdr *ipv6, u16 *ptr, int len)
174{
175 unsigned short *w = ptr;
176 __wsum sum = 0;
177 int i;
178 u16 pa;
179
180 union {
181 struct {
182 u8 ph_src[16];
183 u8 ph_dst[16];
184 u32 ph_len;
185 u8 ph_zero[3];
186 u8 ph_nxt;
187 } ph __packed;
188 u16 pa[20];
189 } pseudo_header;
190
191 memset(&pseudo_header, 0, sizeof(pseudo_header));
192 memcpy(&pseudo_header.ph.ph_src, &ipv6->saddr.in6_u.u6_addr8, 16);
193 memcpy(&pseudo_header.ph.ph_dst, &ipv6->daddr.in6_u.u6_addr8, 16);
194 pseudo_header.ph.ph_len = be16_to_cpu(ipv6->payload_len);
195 pseudo_header.ph.ph_nxt = ipv6->nexthdr;
196
197 w = (u16 *)&pseudo_header;
198 for (i = 0; i < ARRAY_SIZE(pseudo_header.pa); i++) {
199 pa = pseudo_header.pa[i];
200 sum = csum_add(sum, csum_unfold((__force __sum16)pa));
201 }
202
203 w = ptr;
204 while (len > 1) {
205 sum = csum_add(sum, csum_unfold((__force __sum16)*w++));
206 len -= 2;
207 }
208
209 return csum_fold(sum);
210}
211
212static int gdm_lte_emulate_ndp(struct sk_buff *skb_in, u32 nic_type)
213{
214 struct nic *nic = netdev_priv(skb_in->dev);
215 struct sk_buff *skb_out;
216 struct ethhdr eth;
217 struct vlan_ethhdr vlan_eth;
218 struct neighbour_advertisement {
219 u8 target_address[16];
220 u8 type;
221 u8 length;
222 u8 link_layer_address[6];
223 };
224 struct neighbour_advertisement na;
225 struct neighbour_solicitation {
226 u8 target_address[16];
227 };
228 struct neighbour_solicitation *ns;
229 struct ipv6hdr *ipv6_in;
230 struct ipv6hdr ipv6_out;
231 struct icmp6hdr *icmp6_in;
232 struct icmp6hdr icmp6_out;
233
234 void *mac_header_data;
235 u32 mac_header_len;
236
237
238 if (ntohs(((struct ethhdr *)skb_in->data)->h_proto) == ETH_P_8021Q) {
239 memcpy(&vlan_eth, skb_in->data, sizeof(struct vlan_ethhdr));
240 if (ntohs(vlan_eth.h_vlan_encapsulated_proto) != ETH_P_IPV6)
241 return -EPROTONOSUPPORT;
242 mac_header_data = &vlan_eth;
243 mac_header_len = VLAN_ETH_HLEN;
244 } else {
245 memcpy(ð, skb_in->data, sizeof(struct ethhdr));
246 if (ntohs(eth.h_proto) != ETH_P_IPV6)
247 return -EPROTONOSUPPORT;
248 mac_header_data = ð
249 mac_header_len = ETH_HLEN;
250 }
251
252
253 ipv6_in = (struct ipv6hdr *)(skb_in->data + mac_header_len);
254 if (ipv6_in->version != 6 || ipv6_in->nexthdr != IPPROTO_ICMPV6)
255 return -EPROTONOSUPPORT;
256
257
258 icmp6_in = (struct icmp6hdr *)(skb_in->data + mac_header_len +
259 sizeof(struct ipv6hdr));
260 if (icmp6_in->icmp6_type == NDISC_ROUTER_SOLICITATION) {
261 return -EPROTONOSUPPORT;
262 } else if (icmp6_in->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) {
263
264 u8 icmp_na[sizeof(struct icmp6hdr) +
265 sizeof(struct neighbour_advertisement)];
266 u8 zero_addr8[16] = {0,};
267
268 if (memcmp(ipv6_in->saddr.in6_u.u6_addr8, zero_addr8, 16) == 0)
269
270 return 0;
271
272 icmp6_out.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT;
273 icmp6_out.icmp6_code = 0;
274 icmp6_out.icmp6_cksum = 0;
275
276 icmp6_out.icmp6_dataun.un_data32[0] = htonl(0x60000000);
277
278 ns = (struct neighbour_solicitation *)
279 (skb_in->data + mac_header_len +
280 sizeof(struct ipv6hdr) + sizeof(struct icmp6hdr));
281 memcpy(&na.target_address, ns->target_address, 16);
282 na.type = 0x02;
283 na.length = 1;
284 na.link_layer_address[0] = 0x00;
285 na.link_layer_address[1] = 0x0a;
286 na.link_layer_address[2] = 0x3b;
287 na.link_layer_address[3] = 0xaf;
288 na.link_layer_address[4] = 0x63;
289 na.link_layer_address[5] = 0xc7;
290
291 memcpy(&ipv6_out, ipv6_in, sizeof(struct ipv6hdr));
292 memcpy(ipv6_out.saddr.in6_u.u6_addr8, &na.target_address, 16);
293 memcpy(ipv6_out.daddr.in6_u.u6_addr8,
294 ipv6_in->saddr.in6_u.u6_addr8, 16);
295 ipv6_out.payload_len = htons(sizeof(struct icmp6hdr) +
296 sizeof(struct neighbour_advertisement));
297
298 memcpy(icmp_na, &icmp6_out, sizeof(struct icmp6hdr));
299 memcpy(icmp_na + sizeof(struct icmp6hdr), &na,
300 sizeof(struct neighbour_advertisement));
301
302 icmp6_out.icmp6_cksum = icmp6_checksum(&ipv6_out,
303 (u16 *)icmp_na,
304 sizeof(icmp_na));
305 } else {
306 return -EINVAL;
307 }
308
309
310 memcpy(mac_header_data, mac_header_data + ETH_ALEN, ETH_ALEN);
311
312 memcpy(mac_header_data + ETH_ALEN, nic->src_mac_addr, ETH_ALEN);
313
314
315 skb_out = dev_alloc_skb(skb_in->len);
316 if (!skb_out)
317 return -ENOMEM;
318 skb_reserve(skb_out, NET_IP_ALIGN);
319
320 skb_put_data(skb_out, mac_header_data, mac_header_len);
321 skb_put_data(skb_out, &ipv6_out, sizeof(struct ipv6hdr));
322 skb_put_data(skb_out, &icmp6_out, sizeof(struct icmp6hdr));
323 skb_put_data(skb_out, &na, sizeof(struct neighbour_advertisement));
324
325 skb_out->protocol = ((struct ethhdr *)mac_header_data)->h_proto;
326 skb_out->dev = skb_in->dev;
327 skb_reset_mac_header(skb_out);
328 skb_pull(skb_out, ETH_HLEN);
329
330 gdm_lte_rx(skb_out, nic, nic_type);
331
332 return 0;
333}
334
335static s32 gdm_lte_tx_nic_type(struct net_device *dev, struct sk_buff *skb)
336{
337 struct nic *nic = netdev_priv(dev);
338 struct ethhdr *eth;
339 struct vlan_ethhdr *vlan_eth;
340 struct iphdr *ip;
341 struct ipv6hdr *ipv6;
342 int mac_proto;
343 void *network_data;
344 u32 nic_type;
345
346
347 nic_type = 0x00000010 | nic->nic_id;
348
349
350 eth = (struct ethhdr *)skb->data;
351 if (ntohs(eth->h_proto) == ETH_P_8021Q) {
352 vlan_eth = (struct vlan_ethhdr *)skb->data;
353 mac_proto = ntohs(vlan_eth->h_vlan_encapsulated_proto);
354 network_data = skb->data + VLAN_ETH_HLEN;
355 nic_type |= NIC_TYPE_F_VLAN;
356 } else {
357 mac_proto = ntohs(eth->h_proto);
358 network_data = skb->data + ETH_HLEN;
359 }
360
361
362 switch (mac_proto) {
363 case ETH_P_ARP:
364 nic_type |= NIC_TYPE_ARP;
365 break;
366 case ETH_P_IP:
367 nic_type |= NIC_TYPE_F_IPV4;
368 ip = network_data;
369
370
371 if (ip->protocol == IPPROTO_UDP) {
372 struct udphdr *udp =
373 network_data + sizeof(struct iphdr);
374 if (ntohs(udp->dest) == 67 || ntohs(udp->dest) == 68)
375 nic_type |= NIC_TYPE_F_DHCP;
376 }
377 break;
378 case ETH_P_IPV6:
379 nic_type |= NIC_TYPE_F_IPV6;
380 ipv6 = network_data;
381
382 if (ipv6->nexthdr == IPPROTO_ICMPV6) {
383 struct icmp6hdr *icmp6 =
384 network_data + sizeof(struct ipv6hdr);
385 if (icmp6->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION)
386 nic_type |= NIC_TYPE_ICMPV6;
387 } else if (ipv6->nexthdr == IPPROTO_UDP) {
388 struct udphdr *udp =
389 network_data + sizeof(struct ipv6hdr);
390 if (ntohs(udp->dest) == 546 || ntohs(udp->dest) == 547)
391 nic_type |= NIC_TYPE_F_DHCP;
392 }
393 break;
394 default:
395 break;
396 }
397
398 return nic_type;
399}
400
401static netdev_tx_t gdm_lte_tx(struct sk_buff *skb, struct net_device *dev)
402{
403 struct nic *nic = netdev_priv(dev);
404 u32 nic_type;
405 void *data_buf;
406 int data_len;
407 int idx;
408 int ret = 0;
409
410 nic_type = gdm_lte_tx_nic_type(dev, skb);
411 if (nic_type == 0) {
412 netdev_err(dev, "tx - invalid nic_type\n");
413 return -EMEDIUMTYPE;
414 }
415
416 if (nic_type & NIC_TYPE_ARP) {
417 if (gdm_lte_emulate_arp(skb, nic_type) == 0) {
418 dev_kfree_skb(skb);
419 return 0;
420 }
421 }
422
423 if (nic_type & NIC_TYPE_ICMPV6) {
424 if (gdm_lte_emulate_ndp(skb, nic_type) == 0) {
425 dev_kfree_skb(skb);
426 return 0;
427 }
428 }
429
430
431
432
433
434
435
436
437 if (nic_type & NIC_TYPE_F_VLAN) {
438 struct vlan_ethhdr *vlan_eth = (struct vlan_ethhdr *)skb->data;
439
440 nic->vlan_id = ntohs(vlan_eth->h_vlan_TCI) & VLAN_VID_MASK;
441 data_buf = skb->data + (VLAN_ETH_HLEN - ETH_HLEN);
442 data_len = skb->len - (VLAN_ETH_HLEN - ETH_HLEN);
443 } else {
444 nic->vlan_id = 0;
445 data_buf = skb->data;
446 data_len = skb->len;
447 }
448
449
450
451
452 if (nic_type & NIC_TYPE_ICMPV6)
453 nic_type = NIC_TYPE_ICMPV6;
454
455
456
457
458 if (!(nic_type & NIC_TYPE_F_DHCP))
459 nic_type &= NIC_TYPE_MASK;
460
461 ret = sscanf(dev->name, "lte%d", &idx);
462 if (ret != 1) {
463 dev_kfree_skb(skb);
464 return -EINVAL;
465 }
466
467 ret = nic->phy_dev->send_sdu_func(nic->phy_dev->priv_dev,
468 data_buf, data_len,
469 nic->pdn_table.dft_eps_id, 0,
470 tx_complete, nic, idx,
471 nic_type);
472
473 if (ret == TX_NO_BUFFER || ret == TX_NO_SPC) {
474 netif_stop_queue(dev);
475 if (ret == TX_NO_BUFFER)
476 ret = 0;
477 else
478 ret = -ENOSPC;
479 } else if (ret == TX_NO_DEV) {
480 ret = -ENODEV;
481 }
482
483
484 if (ret) {
485 nic->stats.tx_dropped++;
486 } else {
487 nic->stats.tx_packets++;
488 nic->stats.tx_bytes += data_len;
489 }
490 dev_kfree_skb(skb);
491
492 return 0;
493}
494
495static struct net_device_stats *gdm_lte_stats(struct net_device *dev)
496{
497 struct nic *nic = netdev_priv(dev);
498
499 return &nic->stats;
500}
501
502static int gdm_lte_event_send(struct net_device *dev, char *buf, int len)
503{
504 struct phy_dev *phy_dev = ((struct nic *)netdev_priv(dev))->phy_dev;
505 struct hci_packet *hci = (struct hci_packet *)buf;
506 int length;
507 int idx;
508 int ret;
509
510 ret = sscanf(dev->name, "lte%d", &idx);
511 if (ret != 1)
512 return -EINVAL;
513
514 length = gdm_dev16_to_cpu(phy_dev->get_endian(phy_dev->priv_dev),
515 hci->len) + HCI_HEADER_SIZE;
516 return netlink_send(lte_event.sock, idx, 0, buf, length);
517}
518
519static void gdm_lte_event_rcv(struct net_device *dev, u16 type,
520 void *msg, int len)
521{
522 struct nic *nic = netdev_priv(dev);
523
524 nic->phy_dev->send_hci_func(nic->phy_dev->priv_dev, msg, len, NULL,
525 NULL);
526}
527
528int gdm_lte_event_init(void)
529{
530 if (lte_event.ref_cnt == 0)
531 lte_event.sock = netlink_init(NETLINK_LTE, gdm_lte_event_rcv);
532
533 if (lte_event.sock) {
534 lte_event.ref_cnt++;
535 return 0;
536 }
537
538 pr_err("event init failed\n");
539 return -ENODATA;
540}
541
542void gdm_lte_event_exit(void)
543{
544 if (lte_event.sock && --lte_event.ref_cnt == 0) {
545 sock_release(lte_event.sock->sk_socket);
546 lte_event.sock = NULL;
547 }
548}
549
550static int find_dev_index(u32 nic_type)
551{
552 u8 index;
553
554 index = (u8)(nic_type & 0x0000000f);
555 if (index >= MAX_NIC_TYPE)
556 return -EINVAL;
557
558 return index;
559}
560
561static void gdm_lte_netif_rx(struct net_device *dev, char *buf,
562 int len, int flagged_nic_type)
563{
564 u32 nic_type;
565 struct nic *nic;
566 struct sk_buff *skb;
567 struct ethhdr eth;
568 struct vlan_ethhdr vlan_eth;
569 void *mac_header_data;
570 u32 mac_header_len;
571 char ip_version = 0;
572
573 nic_type = flagged_nic_type & NIC_TYPE_MASK;
574 nic = netdev_priv(dev);
575
576 if (flagged_nic_type & NIC_TYPE_F_DHCP) {
577
578
579
580 if (flagged_nic_type & NIC_TYPE_F_IPV4) {
581 struct dhcp_packet {
582 u8 op;
583 u8 htype;
584
585
586 u8 hlen;
587 u8 hops;
588 u32 xid;
589 u16 secs;
590
591
592 u16 flags;
593 #define BROADCAST_FLAG 0x8000
594
595 u32 ciaddr;
596
597
598 u32 yiaddr;
599
600
601
602
603 u32 siaddr_nip;
604 u32 gateway_nip;
605 u8 chaddr[16];
606
607
608 u8 sname[64];
609 u8 file[128];
610 u32 cookie;
611
612
613 } __packed;
614 void *addr = buf + sizeof(struct iphdr) +
615 sizeof(struct udphdr) +
616 offsetof(struct dhcp_packet, chaddr);
617 ether_addr_copy(nic->dest_mac_addr, addr);
618 }
619 }
620
621 if (nic->vlan_id > 0) {
622 mac_header_data = (void *)&vlan_eth;
623 mac_header_len = VLAN_ETH_HLEN;
624 } else {
625 mac_header_data = (void *)ð
626 mac_header_len = ETH_HLEN;
627 }
628
629
630 ether_addr_copy(mac_header_data, nic->dest_mac_addr);
631 memcpy(mac_header_data + ETH_ALEN, nic->src_mac_addr, ETH_ALEN);
632
633 vlan_eth.h_vlan_TCI = htons(nic->vlan_id);
634 vlan_eth.h_vlan_proto = htons(ETH_P_8021Q);
635
636 if (nic_type == NIC_TYPE_ARP) {
637
638
639
640 eth.h_proto = htons(ETH_P_ARP);
641 vlan_eth.h_vlan_encapsulated_proto = htons(ETH_P_ARP);
642 } else {
643 ip_version = buf[0] >> 4;
644 if (ip_version == IP_VERSION_4) {
645 eth.h_proto = htons(ETH_P_IP);
646 vlan_eth.h_vlan_encapsulated_proto = htons(ETH_P_IP);
647 } else if (ip_version == IP_VERSION_6) {
648 eth.h_proto = htons(ETH_P_IPV6);
649 vlan_eth.h_vlan_encapsulated_proto = htons(ETH_P_IPV6);
650 } else {
651 netdev_err(dev, "Unknown IP version %d\n", ip_version);
652 return;
653 }
654 }
655
656
657 skb = dev_alloc_skb(len + mac_header_len + NET_IP_ALIGN);
658 if (!skb)
659 return;
660 skb_reserve(skb, NET_IP_ALIGN);
661
662 skb_put_data(skb, mac_header_data, mac_header_len);
663 skb_put_data(skb, buf, len);
664
665 skb->protocol = ((struct ethhdr *)mac_header_data)->h_proto;
666 skb->dev = dev;
667 skb_reset_mac_header(skb);
668 skb_pull(skb, ETH_HLEN);
669
670 gdm_lte_rx(skb, nic, nic_type);
671}
672
673static void gdm_lte_multi_sdu_pkt(struct phy_dev *phy_dev, char *buf, int len)
674{
675 struct net_device *dev;
676 struct multi_sdu *multi_sdu = (struct multi_sdu *)buf;
677 struct sdu *sdu = NULL;
678 u8 endian = phy_dev->get_endian(phy_dev->priv_dev);
679 u8 *data = (u8 *)multi_sdu->data;
680 u16 i = 0;
681 u16 num_packet;
682 u16 hci_len;
683 u16 cmd_evt;
684 u32 nic_type;
685 int index;
686
687 hci_len = gdm_dev16_to_cpu(endian, multi_sdu->len);
688 num_packet = gdm_dev16_to_cpu(endian, multi_sdu->num_packet);
689
690 for (i = 0; i < num_packet; i++) {
691 sdu = (struct sdu *)data;
692
693 cmd_evt = gdm_dev16_to_cpu(endian, sdu->cmd_evt);
694 hci_len = gdm_dev16_to_cpu(endian, sdu->len);
695 nic_type = gdm_dev32_to_cpu(endian, sdu->nic_type);
696
697 if (cmd_evt != LTE_RX_SDU) {
698 pr_err("rx sdu wrong hci %04x\n", cmd_evt);
699 return;
700 }
701 if (hci_len < 12) {
702 pr_err("rx sdu invalid len %d\n", hci_len);
703 return;
704 }
705
706 index = find_dev_index(nic_type);
707 if (index < 0) {
708 pr_err("rx sdu invalid nic_type :%x\n", nic_type);
709 return;
710 }
711 dev = phy_dev->dev[index];
712 gdm_lte_netif_rx(dev, (char *)sdu->data,
713 (int)(hci_len - 12), nic_type);
714
715 data += ((hci_len + 3) & 0xfffc) + HCI_HEADER_SIZE;
716 }
717}
718
719static void gdm_lte_pdn_table(struct net_device *dev, char *buf, int len)
720{
721 struct nic *nic = netdev_priv(dev);
722 struct hci_pdn_table_ind *pdn_table = (struct hci_pdn_table_ind *)buf;
723 u8 ed = nic->phy_dev->get_endian(nic->phy_dev->priv_dev);
724
725 if (!pdn_table->activate) {
726 memset(&nic->pdn_table, 0x00, sizeof(struct pdn_table));
727 netdev_info(dev, "pdn deactivated\n");
728
729 return;
730 }
731
732 nic->pdn_table.activate = pdn_table->activate;
733 nic->pdn_table.dft_eps_id = gdm_dev32_to_cpu(ed, pdn_table->dft_eps_id);
734 nic->pdn_table.nic_type = gdm_dev32_to_cpu(ed, pdn_table->nic_type);
735
736 netdev_info(dev, "pdn activated, nic_type=0x%x\n",
737 nic->pdn_table.nic_type);
738}
739
740static int gdm_lte_receive_pkt(struct phy_dev *phy_dev, char *buf, int len)
741{
742 struct hci_packet *hci = (struct hci_packet *)buf;
743 struct hci_pdn_table_ind *pdn_table = (struct hci_pdn_table_ind *)buf;
744 struct sdu *sdu;
745 struct net_device *dev;
746 u8 endian = phy_dev->get_endian(phy_dev->priv_dev);
747 int ret = 0;
748 u16 cmd_evt;
749 u32 nic_type;
750 int index;
751
752 if (!len)
753 return ret;
754
755 cmd_evt = gdm_dev16_to_cpu(endian, hci->cmd_evt);
756
757 dev = phy_dev->dev[0];
758 if (!dev)
759 return 0;
760
761 switch (cmd_evt) {
762 case LTE_RX_SDU:
763 sdu = (struct sdu *)hci->data;
764 nic_type = gdm_dev32_to_cpu(endian, sdu->nic_type);
765 index = find_dev_index(nic_type);
766 if (index < 0)
767 return index;
768 dev = phy_dev->dev[index];
769 gdm_lte_netif_rx(dev, hci->data, len, nic_type);
770 break;
771 case LTE_RX_MULTI_SDU:
772 gdm_lte_multi_sdu_pkt(phy_dev, buf, len);
773 break;
774 case LTE_LINK_ON_OFF_INDICATION:
775 netdev_info(dev, "link %s\n",
776 ((struct hci_connect_ind *)buf)->connect
777 ? "on" : "off");
778 break;
779 case LTE_PDN_TABLE_IND:
780 pdn_table = (struct hci_pdn_table_ind *)buf;
781 nic_type = gdm_dev32_to_cpu(endian, pdn_table->nic_type);
782 index = find_dev_index(nic_type);
783 if (index < 0)
784 return index;
785 dev = phy_dev->dev[index];
786 gdm_lte_pdn_table(dev, buf, len);
787
788 default:
789 ret = gdm_lte_event_send(dev, buf, len);
790 break;
791 }
792
793 return ret;
794}
795
796static int rx_complete(void *arg, void *data, int len, int context)
797{
798 struct phy_dev *phy_dev = arg;
799
800 return gdm_lte_receive_pkt(phy_dev, data, len);
801}
802
803void start_rx_proc(struct phy_dev *phy_dev)
804{
805 int i;
806
807 for (i = 0; i < MAX_RX_SUBMIT_COUNT; i++)
808 phy_dev->rcv_func(phy_dev->priv_dev,
809 rx_complete, phy_dev, USB_COMPLETE);
810}
811
812static const struct net_device_ops gdm_netdev_ops = {
813 .ndo_open = gdm_lte_open,
814 .ndo_stop = gdm_lte_close,
815 .ndo_set_config = gdm_lte_set_config,
816 .ndo_start_xmit = gdm_lte_tx,
817 .ndo_get_stats = gdm_lte_stats,
818};
819
820static u8 gdm_lte_macaddr[ETH_ALEN] = {0x00, 0x0a, 0x3b, 0x00, 0x00, 0x00};
821
822static void form_mac_address(u8 *dev_addr, u8 *nic_src, u8 *nic_dest,
823 u8 *mac_address, u8 index)
824{
825
826 if (!mac_address)
827 ether_addr_copy(dev_addr, gdm_lte_macaddr);
828 else
829 ether_addr_copy(dev_addr, mac_address);
830
831
832
833
834 dev_addr[ETH_ALEN - 1] += index;
835
836
837
838
839 eth_random_addr(nic_src);
840 memcpy(nic_src, dev_addr, 3);
841
842
843 ether_addr_copy(nic_dest, dev_addr);
844}
845
846static void validate_mac_address(u8 *mac_address)
847{
848
849 if (is_zero_ether_addr(mac_address) || (mac_address[0] & 0x01)) {
850 pr_err("MAC invalid, restoring default\n");
851 memcpy(mac_address, gdm_lte_macaddr, 6);
852 }
853}
854
855int register_lte_device(struct phy_dev *phy_dev,
856 struct device *dev, u8 *mac_address)
857{
858 struct nic *nic;
859 struct net_device *net;
860 char pdn_dev_name[16];
861 int ret = 0;
862 u8 index;
863
864 validate_mac_address(mac_address);
865
866 for (index = 0; index < MAX_NIC_TYPE; index++) {
867
868 sprintf(pdn_dev_name, "lte%%dpdn%d", index);
869
870
871 net = alloc_netdev(sizeof(struct nic), pdn_dev_name,
872 NET_NAME_UNKNOWN, ether_setup);
873 if (!net) {
874 ret = -ENOMEM;
875 goto err;
876 }
877 net->netdev_ops = &gdm_netdev_ops;
878 net->flags &= ~IFF_MULTICAST;
879 net->mtu = DEFAULT_MTU_SIZE;
880
881 nic = netdev_priv(net);
882 memset(nic, 0, sizeof(struct nic));
883 nic->netdev = net;
884 nic->phy_dev = phy_dev;
885 nic->nic_id = index;
886
887 form_mac_address(net->dev_addr,
888 nic->src_mac_addr,
889 nic->dest_mac_addr,
890 mac_address,
891 index);
892
893 SET_NETDEV_DEV(net, dev);
894 SET_NETDEV_DEVTYPE(net, &wwan_type);
895
896 ret = register_netdev(net);
897 if (ret)
898 goto err;
899
900 netif_carrier_on(net);
901
902 phy_dev->dev[index] = net;
903 }
904
905 return 0;
906
907err:
908 unregister_lte_device(phy_dev);
909
910 return ret;
911}
912
913void unregister_lte_device(struct phy_dev *phy_dev)
914{
915 struct net_device *net;
916 int index;
917
918 for (index = 0; index < MAX_NIC_TYPE; index++) {
919 net = phy_dev->dev[index];
920 if (!net)
921 continue;
922
923 unregister_netdev(net);
924 free_netdev(net);
925 }
926}
927
