1/* 2 * Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved. 3 * 4 * This software is licensed under the terms of the GNU General Public 5 * License version 2, as published by the Free Software Foundation, and 6 * may be copied, distributed, and modified under those terms. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 */ 13 14#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 15 16#include <linux/etherdevice.h> 17#include <linux/ip.h> 18#include <linux/ipv6.h> 19#include <linux/udp.h> 20#include <linux/in.h> 21#include <linux/if_arp.h> 22#include <linux/if_ether.h> 23#include <linux/if_vlan.h> 24#include <linux/in6.h> 25#include <linux/tcp.h> 26#include <linux/icmp.h> 27#include <linux/icmpv6.h> 28#include <linux/uaccess.h> 29#include <net/ndisc.h> 30 31#include "gdm_lte.h" 32#include "netlink_k.h" 33#include "hci.h" 34#include "hci_packet.h" 35#include "gdm_endian.h" 36 37/* 38 * Netlink protocol number 39 */ 40#define NETLINK_LTE 30 41 42/* 43 * Default MTU Size 44 */ 45#define DEFAULT_MTU_SIZE 1500 46 47#define IP_VERSION_4 4 48#define IP_VERSION_6 6 49 50static struct { 51 int ref_cnt; 52 struct sock *sock; 53} lte_event; 54 55static struct device_type wwan_type = { 56 .name = "wwan", 57}; 58 59static int gdm_lte_open(struct net_device *dev) 60{ 61 netif_start_queue(dev); 62 return 0; 63} 64 65static int gdm_lte_close(struct net_device *dev) 66{ 67 netif_stop_queue(dev); 68 return 0; 69} 70 71static int gdm_lte_set_config(struct net_device *dev, struct ifmap *map) 72{ 73 if (dev->flags & IFF_UP) 74 return -EBUSY; 75 return 0; 76} 77 78static void tx_complete(void *arg) 79{ 80 struct nic *nic = arg; 81 82 if (netif_queue_stopped(nic->netdev)) 83 netif_wake_queue(nic->netdev); 84} 85 86static int gdm_lte_rx(struct sk_buff *skb, struct nic *nic, int nic_type) 87{ 88 int ret; 89 90 ret = netif_rx_ni(skb); 91 if (ret == NET_RX_DROP) { 92 nic->stats.rx_dropped++; 93 } else { 94 nic->stats.rx_packets++; 95 nic->stats.rx_bytes += skb->len + ETH_HLEN; 96 } 97 98 return 0; 99} 100 101static int gdm_lte_emulate_arp(struct sk_buff *skb_in, u32 nic_type) 102{ 103 struct nic *nic = netdev_priv(skb_in->dev); 104 struct sk_buff *skb_out; 105 struct ethhdr eth; 106 struct vlan_ethhdr vlan_eth; 107 struct arphdr *arp_in; 108 struct arphdr *arp_out; 109 struct arpdata { 110 u8 ar_sha[ETH_ALEN]; 111 u8 ar_sip[4]; 112 u8 ar_tha[ETH_ALEN]; 113 u8 ar_tip[4]; 114 }; 115 struct arpdata *arp_data_in; 116 struct arpdata *arp_data_out; 117 u8 arp_temp[60]; 118 void *mac_header_data; 119 u32 mac_header_len; 120 121 /* Format the mac header so that it can be put to skb */ 122 if (ntohs(((struct ethhdr *)skb_in->data)->h_proto) == ETH_P_8021Q) { 123 memcpy(&vlan_eth, skb_in->data, sizeof(struct vlan_ethhdr)); 124 mac_header_data = &vlan_eth; 125 mac_header_len = VLAN_ETH_HLEN; 126 } else { 127 memcpy(ð, skb_in->data, sizeof(struct ethhdr)); 128 mac_header_data = ð 129 mac_header_len = ETH_HLEN; 130 } 131 132 /* Get the pointer of the original request */ 133 arp_in = (struct arphdr *)(skb_in->data + mac_header_len); 134 arp_data_in = (struct arpdata *)(skb_in->data + mac_header_len + 135 sizeof(struct arphdr)); 136 137 /* Get the pointer of the outgoing response */ 138 arp_out = (struct arphdr *)arp_temp; 139 arp_data_out = (struct arpdata *)(arp_temp + sizeof(struct arphdr)); 140 141 /* Copy the arp header */ 142 memcpy(arp_out, arp_in, sizeof(struct arphdr)); 143 arp_out->ar_op = htons(ARPOP_REPLY); 144 145 /* Copy the arp payload: based on 2 bytes of mac and fill the IP */ 146 arp_data_out->ar_sha[0] = arp_data_in->ar_sha[0]; 147 arp_data_out->ar_sha[1] = arp_data_in->ar_sha[1]; 148 memcpy(&arp_data_out->ar_sha[2], &arp_data_in->ar_tip[0], 4); 149 memcpy(&arp_data_out->ar_sip[0], &arp_data_in->ar_tip[0], 4); 150 memcpy(&arp_data_out->ar_tha[0], &arp_data_in->ar_sha[0], 6); 151 memcpy(&arp_data_out->ar_tip[0], &arp_data_in->ar_sip[0], 4); 152 153 /* Fill the destination mac with source mac of the received packet */ 154 memcpy(mac_header_data, mac_header_data + ETH_ALEN, ETH_ALEN); 155 /* Fill the source mac with nic's source mac */ 156 memcpy(mac_header_data + ETH_ALEN, nic->src_mac_addr, ETH_ALEN); 157 158 /* Alloc skb and reserve align */ 159 skb_out = dev_alloc_skb(skb_in->len); 160 if (!skb_out) 161 return -ENOMEM; 162 skb_reserve(skb_out, NET_IP_ALIGN); 163 164 memcpy(skb_put(skb_out, mac_header_len), mac_header_data, 165 mac_header_len); 166 memcpy(skb_put(skb_out, sizeof(struct arphdr)), arp_out, 167 sizeof(struct arphdr)); 168 memcpy(skb_put(skb_out, sizeof(struct arpdata)), arp_data_out, 169 sizeof(struct arpdata)); 170 171 skb_out->protocol = ((struct ethhdr *)mac_header_data)->h_proto; 172 skb_out->dev = skb_in->dev; 173 skb_reset_mac_header(skb_out); 174 skb_pull(skb_out, ETH_HLEN); 175 176 gdm_lte_rx(skb_out, nic, nic_type); 177 178 return 0; 179} 180 181static int icmp6_checksum(struct ipv6hdr *ipv6, u16 *ptr, int len) 182{ 183 unsigned short *w = ptr; 184 int sum = 0; 185 int i; 186 187 union { 188 struct { 189 u8 ph_src[16]; 190 u8 ph_dst[16]; 191 u32 ph_len; 192 u8 ph_zero[3]; 193 u8 ph_nxt; 194 } ph __packed; 195 u16 pa[20]; 196 } pseudo_header; 197 198 memset(&pseudo_header, 0, sizeof(pseudo_header)); 199 memcpy(&pseudo_header.ph.ph_src, &ipv6->saddr.in6_u.u6_addr8, 16); 200 memcpy(&pseudo_header.ph.ph_dst, &ipv6->daddr.in6_u.u6_addr8, 16); 201 pseudo_header.ph.ph_len = ipv6->payload_len; 202 pseudo_header.ph.ph_nxt = ipv6->nexthdr; 203 204 w = (u16 *)&pseudo_header; 205 for (i = 0; i < ARRAY_SIZE(pseudo_header.pa); i++) 206 sum += pseudo_header.pa[i]; 207 208 w = ptr; 209 while (len > 1) { 210 sum += *w++; 211 len -= 2; 212 } 213 214 sum = (sum >> 16) + (sum & 0xFFFF); 215 sum += (sum >> 16); 216 sum = ~sum & 0xffff; 217 218 return sum; 219} 220 221static int gdm_lte_emulate_ndp(struct sk_buff *skb_in, u32 nic_type) 222{ 223 struct nic *nic = netdev_priv(skb_in->dev); 224 struct sk_buff *skb_out; 225 struct ethhdr eth; 226 struct vlan_ethhdr vlan_eth; 227 struct neighbour_advertisement { 228 u8 target_address[16]; 229 u8 type; 230 u8 length; 231 u8 link_layer_address[6]; 232 }; 233 struct neighbour_advertisement na; 234 struct neighbour_solicitation { 235 u8 target_address[16]; 236 }; 237 struct neighbour_solicitation *ns; 238 struct ipv6hdr *ipv6_in; 239 struct ipv6hdr ipv6_out; 240 struct icmp6hdr *icmp6_in; 241 struct icmp6hdr icmp6_out; 242 243 void *mac_header_data; 244 u32 mac_header_len; 245 246 /* Format the mac header so that it can be put to skb */ 247 if (ntohs(((struct ethhdr *)skb_in->data)->h_proto) == ETH_P_8021Q) { 248 memcpy(&vlan_eth, skb_in->data, sizeof(struct vlan_ethhdr)); 249 if (ntohs(vlan_eth.h_vlan_encapsulated_proto) != ETH_P_IPV6) 250 return -1; 251 mac_header_data = &vlan_eth; 252 mac_header_len = VLAN_ETH_HLEN; 253 } else { 254 memcpy(ð, skb_in->data, sizeof(struct ethhdr)); 255 if (ntohs(eth.h_proto) != ETH_P_IPV6) 256 return -1; 257 mac_header_data = ð 258 mac_header_len = ETH_HLEN; 259 } 260 261 /* Check if this is IPv6 ICMP packet */ 262 ipv6_in = (struct ipv6hdr *)(skb_in->data + mac_header_len); 263 if (ipv6_in->version != 6 || ipv6_in->nexthdr != IPPROTO_ICMPV6) 264 return -1; 265 266 /* Check if this is NDP packet */ 267 icmp6_in = (struct icmp6hdr *)(skb_in->data + mac_header_len + 268 sizeof(struct ipv6hdr)); 269 if (icmp6_in->icmp6_type == NDISC_ROUTER_SOLICITATION) { /* Check RS */ 270 return -1; 271 } else if (icmp6_in->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) { 272 /* Check NS */ 273 u8 icmp_na[sizeof(struct icmp6hdr) + 274 sizeof(struct neighbour_advertisement)]; 275 u8 zero_addr8[16] = {0,}; 276 277 if (memcmp(ipv6_in->saddr.in6_u.u6_addr8, zero_addr8, 16) == 0) 278 /* Duplicate Address Detection: Source IP is all zero */ 279 return 0; 280 281 icmp6_out.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT; 282 icmp6_out.icmp6_code = 0; 283 icmp6_out.icmp6_cksum = 0; 284 icmp6_out.icmp6_dataun.un_data32[0] = htonl(0x60000000); /* R=0, S=1, O=1 */ 285 286 ns = (struct neighbour_solicitation *) 287 (skb_in->data + mac_header_len + 288 sizeof(struct ipv6hdr) + sizeof(struct icmp6hdr)); 289 memcpy(&na.target_address, ns->target_address, 16); 290 na.type = 0x02; 291 na.length = 1; 292 na.link_layer_address[0] = 0x00; 293 na.link_layer_address[1] = 0x0a; 294 na.link_layer_address[2] = 0x3b; 295 na.link_layer_address[3] = 0xaf; 296 na.link_layer_address[4] = 0x63; 297 na.link_layer_address[5] = 0xc7; 298 299 memcpy(&ipv6_out, ipv6_in, sizeof(struct ipv6hdr)); 300 memcpy(ipv6_out.saddr.in6_u.u6_addr8, &na.target_address, 16); 301 memcpy(ipv6_out.daddr.in6_u.u6_addr8, 302 ipv6_in->saddr.in6_u.u6_addr8, 16); 303 ipv6_out.payload_len = htons(sizeof(struct icmp6hdr) + 304 sizeof(struct neighbour_advertisement)); 305 306 memcpy(icmp_na, &icmp6_out, sizeof(struct icmp6hdr)); 307 memcpy(icmp_na + sizeof(struct icmp6hdr), &na, 308 sizeof(struct neighbour_advertisement)); 309 310 icmp6_out.icmp6_cksum = icmp6_checksum(&ipv6_out, 311 (u16 *)icmp_na, sizeof(icmp_na)); 312 } else { 313 return -1; 314 } 315 316 /* Fill the destination mac with source mac of the received packet */ 317 memcpy(mac_header_data, mac_header_data + ETH_ALEN, ETH_ALEN); 318 /* Fill the source mac with nic's source mac */ 319 memcpy(mac_header_data + ETH_ALEN, nic->src_mac_addr, ETH_ALEN); 320 321 /* Alloc skb and reserve align */ 322 skb_out = dev_alloc_skb(skb_in->len); 323 if (!skb_out) 324 return -ENOMEM; 325 skb_reserve(skb_out, NET_IP_ALIGN); 326 327 memcpy(skb_put(skb_out, mac_header_len), mac_header_data, 328 mac_header_len); 329 memcpy(skb_put(skb_out, sizeof(struct ipv6hdr)), &ipv6_out, 330 sizeof(struct ipv6hdr)); 331 memcpy(skb_put(skb_out, sizeof(struct icmp6hdr)), &icmp6_out, 332 sizeof(struct icmp6hdr)); 333 memcpy(skb_put(skb_out, sizeof(struct neighbour_advertisement)), &na, 334 sizeof(struct neighbour_advertisement)); 335 336 skb_out->protocol = ((struct ethhdr *)mac_header_data)->h_proto; 337 skb_out->dev = skb_in->dev; 338 skb_reset_mac_header(skb_out); 339 skb_pull(skb_out, ETH_HLEN); 340 341 gdm_lte_rx(skb_out, nic, nic_type); 342 343 return 0; 344} 345 346static s32 gdm_lte_tx_nic_type(struct net_device *dev, struct sk_buff *skb) 347{ 348 struct nic *nic = netdev_priv(dev); 349 struct ethhdr *eth; 350 struct vlan_ethhdr *vlan_eth; 351 struct iphdr *ip; 352 struct ipv6hdr *ipv6; 353 int mac_proto; 354 void *network_data; 355 u32 nic_type = 0; 356 357 /* NIC TYPE is based on the nic_id of this net_device */ 358 nic_type = 0x00000010 | nic->nic_id; 359 360 /* Get ethernet protocol */ 361 eth = (struct ethhdr *)skb->data; 362 if (ntohs(eth->h_proto) == ETH_P_8021Q) { 363 vlan_eth = (struct vlan_ethhdr *)skb->data; 364 mac_proto = ntohs(vlan_eth->h_vlan_encapsulated_proto); 365 network_data = skb->data + VLAN_ETH_HLEN; 366 nic_type |= NIC_TYPE_F_VLAN; 367 } else { 368 mac_proto = ntohs(eth->h_proto); 369 network_data = skb->data + ETH_HLEN; 370 } 371 372 /* Process packet for nic type */ 373 switch (mac_proto) { 374 case ETH_P_ARP: 375 nic_type |= NIC_TYPE_ARP; 376 break; 377 case ETH_P_IP: 378 nic_type |= NIC_TYPE_F_IPV4; 379 ip = (struct iphdr *)network_data; 380 381 /* Check DHCPv4 */ 382 if (ip->protocol == IPPROTO_UDP) { 383 struct udphdr *udp = (struct udphdr *) 384 (network_data + sizeof(struct iphdr)); 385 if (ntohs(udp->dest) == 67 || ntohs(udp->dest) == 68) 386 nic_type |= NIC_TYPE_F_DHCP; 387 } 388 break; 389 case ETH_P_IPV6: 390 nic_type |= NIC_TYPE_F_IPV6; 391 ipv6 = (struct ipv6hdr *)network_data; 392 393 if (ipv6->nexthdr == IPPROTO_ICMPV6) /* Check NDP request */ { 394 struct icmp6hdr *icmp6 = (struct icmp6hdr *) 395 (network_data + sizeof(struct ipv6hdr)); 396 if (icmp6->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) 397 nic_type |= NIC_TYPE_ICMPV6; 398 } else if (ipv6->nexthdr == IPPROTO_UDP) /* Check DHCPv6 */ { 399 struct udphdr *udp = (struct udphdr *) 400 (network_data + sizeof(struct ipv6hdr)); 401 if (ntohs(udp->dest) == 546 || ntohs(udp->dest) == 547) 402 nic_type |= NIC_TYPE_F_DHCP; 403 } 404 break; 405 default: 406 break; 407 } 408 409 return nic_type; 410} 411 412static int gdm_lte_tx(struct sk_buff *skb, struct net_device *dev) 413{ 414 struct nic *nic = netdev_priv(dev); 415 u32 nic_type; 416 void *data_buf; 417 int data_len; 418 int idx; 419 int ret = 0; 420 421 nic_type = gdm_lte_tx_nic_type(dev, skb); 422 if (nic_type == 0) { 423 netdev_err(dev, "tx - invalid nic_type\n"); 424 return -1; 425 } 426 427 if (nic_type & NIC_TYPE_ARP) { 428 if (gdm_lte_emulate_arp(skb, nic_type) == 0) { 429 dev_kfree_skb(skb); 430 return 0; 431 } 432 } 433 434 if (nic_type & NIC_TYPE_ICMPV6) { 435 if (gdm_lte_emulate_ndp(skb, nic_type) == 0) { 436 dev_kfree_skb(skb); 437 return 0; 438 } 439 } 440 441 /* 442 * Need byte shift (that is, remove VLAN tag) if there is one 443 * For the case of ARP, this breaks the offset as vlan_ethhdr+4 444 * is treated as ethhdr However, it shouldn't be a problem as 445 * the response starts from arp_hdr and ethhdr is created by this 446 * driver based on the NIC mac 447 */ 448 if (nic_type & NIC_TYPE_F_VLAN) { 449 struct vlan_ethhdr *vlan_eth = (struct vlan_ethhdr *)skb->data; 450 451 nic->vlan_id = ntohs(vlan_eth->h_vlan_TCI) & VLAN_VID_MASK; 452 data_buf = skb->data + (VLAN_ETH_HLEN - ETH_HLEN); 453 data_len = skb->len - (VLAN_ETH_HLEN - ETH_HLEN); 454 } else { 455 nic->vlan_id = 0; 456 data_buf = skb->data; 457 data_len = skb->len; 458 } 459 460 /* If it is a ICMPV6 packet, clear all the other bits : 461 * for backward compatibility with the firmware 462 */ 463 if (nic_type & NIC_TYPE_ICMPV6) 464 nic_type = NIC_TYPE_ICMPV6; 465 466 /* If it is not a dhcp packet, clear all the flag bits : 467 * original NIC, otherwise the special flag (IPVX | DHCP) 468 */ 469 if (!(nic_type & NIC_TYPE_F_DHCP)) 470 nic_type &= NIC_TYPE_MASK; 471 472 ret = sscanf(dev->name, "lte%d", &idx); 473 if (ret != 1) { 474 dev_kfree_skb(skb); 475 return -EINVAL; 476 } 477 478 ret = nic->phy_dev->send_sdu_func(nic->phy_dev->priv_dev, 479 data_buf, data_len, 480 nic->pdn_table.dft_eps_id, 0, 481 tx_complete, nic, idx, 482 nic_type); 483 484 if (ret == TX_NO_BUFFER || ret == TX_NO_SPC) { 485 netif_stop_queue(dev); 486 if (ret == TX_NO_BUFFER) 487 ret = 0; 488 else 489 ret = -ENOSPC; 490 } else if (ret == TX_NO_DEV) { 491 ret = -ENODEV; 492 } 493 494 /* Updates tx stats */ 495 if (ret) { 496 nic->stats.tx_dropped++; 497 } else { 498 nic->stats.tx_packets++; 499 nic->stats.tx_bytes += data_len; 500 } 501 dev_kfree_skb(skb); 502 503 return 0; 504} 505 506static struct net_device_stats *gdm_lte_stats(struct net_device *dev) 507{ 508 struct nic *nic = netdev_priv(dev); 509 510 return &nic->stats; 511} 512 513static int gdm_lte_event_send(struct net_device *dev, char *buf, int len) 514{ 515 struct nic *nic = netdev_priv(dev); 516 struct hci_packet *hci = (struct hci_packet *)buf; 517 int idx; 518 int ret; 519 520 ret = sscanf(dev->name, "lte%d", &idx); 521 if (ret != 1) 522 return -EINVAL; 523 524 return netlink_send(lte_event.sock, idx, 0, buf, 525 gdm_dev16_to_cpu( 526 nic->phy_dev->get_endian( 527 nic->phy_dev->priv_dev), hci->len) 528 + HCI_HEADER_SIZE); 529} 530 531static void gdm_lte_event_rcv(struct net_device *dev, u16 type, 532 void *msg, int len) 533{ 534 struct nic *nic = netdev_priv(dev); 535 536 nic->phy_dev->send_hci_func(nic->phy_dev->priv_dev, msg, len, NULL, 537 NULL); 538} 539 540int gdm_lte_event_init(void) 541{ 542 if (lte_event.ref_cnt == 0) 543 lte_event.sock = netlink_init(NETLINK_LTE, gdm_lte_event_rcv); 544 545 if (lte_event.sock) { 546 lte_event.ref_cnt++; 547 return 0; 548 } 549 550 pr_err("event init failed\n"); 551 return -1; 552} 553 554void gdm_lte_event_exit(void) 555{ 556 if (lte_event.sock && --lte_event.ref_cnt == 0) { 557 netlink_exit(lte_event.sock); 558 lte_event.sock = NULL; 559 } 560} 561 562static u8 find_dev_index(u32 nic_type) 563{ 564 u8 index; 565 566 index = (u8)(nic_type & 0x0000000f); 567 if (index > MAX_NIC_TYPE) 568 index = 0; 569 570 return index; 571} 572 573static void gdm_lte_netif_rx(struct net_device *dev, char *buf, 574 int len, int flagged_nic_type) 575{ 576 u32 nic_type; 577 struct nic *nic; 578 struct sk_buff *skb; 579 struct ethhdr eth; 580 struct vlan_ethhdr vlan_eth; 581 void *mac_header_data; 582 u32 mac_header_len; 583 char ip_version = 0; 584 585 nic_type = flagged_nic_type & NIC_TYPE_MASK; 586 nic = netdev_priv(dev); 587 588 if (flagged_nic_type & NIC_TYPE_F_DHCP) { 589 /* Change the destination mac address 590 * with the one requested the IP 591 */ 592 if (flagged_nic_type & NIC_TYPE_F_IPV4) { 593 struct dhcp_packet { 594 u8 op; /* BOOTREQUEST or BOOTREPLY */ 595 u8 htype; /* hardware address type. 596 * 1 = 10mb ethernet 597 */ 598 u8 hlen; /* hardware address length */ 599 u8 hops; /* used by relay agents only */ 600 u32 xid; /* unique id */ 601 u16 secs; /* elapsed since client began 602 * acquisition/renewal 603 */ 604 u16 flags; /* only one flag so far: */ 605 #define BROADCAST_FLAG 0x8000 606 /* "I need broadcast replies" */ 607 u32 ciaddr; /* client IP (if client is in 608 * BOUND, RENEW or REBINDING state) 609 */ 610 u32 yiaddr; /* 'your' (client) IP address */ 611 /* IP address of next server to use in 612 * bootstrap, returned in DHCPOFFER, 613 * DHCPACK by server 614 */ 615 u32 siaddr_nip; 616 u32 gateway_nip; /* relay agent IP address */ 617 u8 chaddr[16]; /* link-layer client hardware 618 * address (MAC) 619 */ 620 u8 sname[64]; /* server host name (ASCIZ) */ 621 u8 file[128]; /* boot file name (ASCIZ) */ 622 u32 cookie; /* fixed first four option 623 * bytes (99,130,83,99 dec) 624 */ 625 } __packed; 626 void *addr = buf + sizeof(struct iphdr) + 627 sizeof(struct udphdr) + 628 offsetof(struct dhcp_packet, chaddr); 629 memcpy(nic->dest_mac_addr, addr, ETH_ALEN); 630 } 631 } 632 633 if (nic->vlan_id > 0) { 634 mac_header_data = (void *)&vlan_eth; 635 mac_header_len = VLAN_ETH_HLEN; 636 } else { 637 mac_header_data = (void *)ð 638 mac_header_len = ETH_HLEN; 639 } 640 641 /* Format the data so that it can be put to skb */ 642 memcpy(mac_header_data, nic->dest_mac_addr, ETH_ALEN); 643 memcpy(mac_header_data + ETH_ALEN, nic->src_mac_addr, ETH_ALEN); 644 645 vlan_eth.h_vlan_TCI = htons(nic->vlan_id); 646 vlan_eth.h_vlan_proto = htons(ETH_P_8021Q); 647 648 if (nic_type == NIC_TYPE_ARP) { 649 /* Should be response: Only happens because 650 * there was a request from the host 651 */ 652 eth.h_proto = htons(ETH_P_ARP); 653 vlan_eth.h_vlan_encapsulated_proto = htons(ETH_P_ARP); 654 } else { 655 ip_version = buf[0] >> 4; 656 if (ip_version == IP_VERSION_4) { 657 eth.h_proto = htons(ETH_P_IP); 658 vlan_eth.h_vlan_encapsulated_proto = htons(ETH_P_IP); 659 } else if (ip_version == IP_VERSION_6) { 660 eth.h_proto = htons(ETH_P_IPV6); 661 vlan_eth.h_vlan_encapsulated_proto = htons(ETH_P_IPV6); 662 } else { 663 netdev_err(dev, "Unknown IP version %d\n", ip_version); 664 return; 665 } 666 } 667 668 /* Alloc skb and reserve align */ 669 skb = dev_alloc_skb(len + mac_header_len + NET_IP_ALIGN); 670 if (!skb) 671 return; 672 skb_reserve(skb, NET_IP_ALIGN); 673 674 memcpy(skb_put(skb, mac_header_len), mac_header_data, mac_header_len); 675 memcpy(skb_put(skb, len), buf, len); 676 677 skb->protocol = ((struct ethhdr *)mac_header_data)->h_proto; 678 skb->dev = dev; 679 skb_reset_mac_header(skb); 680 skb_pull(skb, ETH_HLEN); 681 682 gdm_lte_rx(skb, nic, nic_type); 683} 684 685static void gdm_lte_multi_sdu_pkt(struct phy_dev *phy_dev, char *buf, int len) 686{ 687 struct net_device *dev; 688 struct multi_sdu *multi_sdu = (struct multi_sdu *)buf; 689 struct sdu *sdu = NULL; 690 u8 *data = (u8 *)multi_sdu->data; 691 u16 i = 0; 692 u16 num_packet; 693 u16 hci_len; 694 u16 cmd_evt; 695 u32 nic_type; 696 u8 index; 697 698 hci_len = gdm_dev16_to_cpu(phy_dev->get_endian(phy_dev->priv_dev), 699 multi_sdu->len); 700 num_packet = gdm_dev16_to_cpu(phy_dev->get_endian(phy_dev->priv_dev), 701 multi_sdu->num_packet); 702 703 for (i = 0; i < num_packet; i++) { 704 sdu = (struct sdu *)data; 705 706 cmd_evt = gdm_dev16_to_cpu(phy_dev-> 707 get_endian(phy_dev->priv_dev), sdu->cmd_evt); 708 hci_len = gdm_dev16_to_cpu(phy_dev-> 709 get_endian(phy_dev->priv_dev), sdu->len); 710 nic_type = gdm_dev32_to_cpu(phy_dev-> 711 get_endian(phy_dev->priv_dev), sdu->nic_type); 712 713 if (cmd_evt != LTE_RX_SDU) { 714 pr_err("rx sdu wrong hci %04x\n", cmd_evt); 715 return; 716 } 717 if (hci_len < 12) { 718 pr_err("rx sdu invalid len %d\n", hci_len); 719 return; 720 } 721 722 index = find_dev_index(nic_type); 723 if (index < MAX_NIC_TYPE) { 724 dev = phy_dev->dev[index]; 725 gdm_lte_netif_rx(dev, (char *)sdu->data, 726 (int)(hci_len-12), nic_type); 727 } else { 728 pr_err("rx sdu invalid nic_type :%x\n", nic_type); 729 } 730 731 data += ((hci_len+3) & 0xfffc) + HCI_HEADER_SIZE; 732 } 733} 734 735static void gdm_lte_pdn_table(struct net_device *dev, char *buf, int len) 736{ 737 struct nic *nic = netdev_priv(dev); 738 struct hci_pdn_table_ind *pdn_table = (struct hci_pdn_table_ind *)buf; 739 740 if (pdn_table->activate) { 741 nic->pdn_table.activate = pdn_table->activate; 742 nic->pdn_table.dft_eps_id = gdm_dev32_to_cpu( 743 nic->phy_dev->get_endian( 744 nic->phy_dev->priv_dev), 745 pdn_table->dft_eps_id); 746 nic->pdn_table.nic_type = gdm_dev32_to_cpu( 747 nic->phy_dev->get_endian( 748 nic->phy_dev->priv_dev), 749 pdn_table->nic_type); 750 751 netdev_info(dev, "pdn activated, nic_type=0x%x\n", 752 nic->pdn_table.nic_type); 753 } else { 754 memset(&nic->pdn_table, 0x00, sizeof(struct pdn_table)); 755 netdev_info(dev, "pdn deactivated\n"); 756 } 757} 758 759static int gdm_lte_receive_pkt(struct phy_dev *phy_dev, char *buf, int len) 760{ 761 struct hci_packet *hci = (struct hci_packet *)buf; 762 struct hci_pdn_table_ind *pdn_table = (struct hci_pdn_table_ind *)buf; 763 struct sdu *sdu; 764 struct net_device *dev; 765 int ret = 0; 766 u16 cmd_evt; 767 u32 nic_type; 768 u8 index; 769 770 if (!len) 771 return ret; 772 773 cmd_evt = gdm_dev16_to_cpu(phy_dev->get_endian(phy_dev->priv_dev), 774 hci->cmd_evt); 775 776 dev = phy_dev->dev[0]; 777 if (dev == NULL) 778 return 0; 779 780 switch (cmd_evt) { 781 case LTE_RX_SDU: 782 sdu = (struct sdu *)hci->data; 783 nic_type = gdm_dev32_to_cpu(phy_dev-> 784 get_endian(phy_dev->priv_dev), sdu->nic_type); 785 index = find_dev_index(nic_type); 786 dev = phy_dev->dev[index]; 787 gdm_lte_netif_rx(dev, hci->data, len, nic_type); 788 break; 789 case LTE_RX_MULTI_SDU: 790 gdm_lte_multi_sdu_pkt(phy_dev, buf, len); 791 break; 792 case LTE_LINK_ON_OFF_INDICATION: 793 netdev_info(dev, "link %s\n", 794 ((struct hci_connect_ind *)buf)->connect 795 ? "on" : "off"); 796 break; 797 case LTE_PDN_TABLE_IND: 798 pdn_table = (struct hci_pdn_table_ind *)buf; 799 nic_type = gdm_dev32_to_cpu(phy_dev-> 800 get_endian(phy_dev->priv_dev), 801 pdn_table->nic_type); 802 index = find_dev_index(nic_type); 803 dev = phy_dev->dev[index]; 804 gdm_lte_pdn_table(dev, buf, len); 805 /* Fall through */ 806 default: 807 ret = gdm_lte_event_send(dev, buf, len); 808 break; 809 } 810 811 return ret; 812} 813 814static int rx_complete(void *arg, void *data, int len, int context) 815{ 816 struct phy_dev *phy_dev = (struct phy_dev *)arg; 817 818 return gdm_lte_receive_pkt(phy_dev, (char *)data, len); 819} 820 821void start_rx_proc(struct phy_dev *phy_dev) 822{ 823 int i; 824 825 for (i = 0; i < MAX_RX_SUBMIT_COUNT; i++) 826 phy_dev->rcv_func(phy_dev->priv_dev, 827 rx_complete, phy_dev, USB_COMPLETE); 828} 829 830static struct net_device_ops gdm_netdev_ops = { 831 .ndo_open = gdm_lte_open, 832 .ndo_stop = gdm_lte_close, 833 .ndo_set_config = gdm_lte_set_config, 834 .ndo_start_xmit = gdm_lte_tx, 835 .ndo_get_stats = gdm_lte_stats, 836}; 837 838static u8 gdm_lte_macaddr[ETH_ALEN] = {0x00, 0x0a, 0x3b, 0x00, 0x00, 0x00}; 839 840static void form_mac_address(u8 *dev_addr, u8 *nic_src, u8 *nic_dest, 841 u8 *mac_address, u8 index) 842{ 843 /* Form the dev_addr */ 844 if (!mac_address) 845 memcpy(dev_addr, gdm_lte_macaddr, ETH_ALEN); 846 else 847 memcpy(dev_addr, mac_address, ETH_ALEN); 848 849 /* The last byte of the mac address 850 * should be less than or equal to 0xFC 851 */ 852 dev_addr[ETH_ALEN-1] += index; 853 854 /* Create random nic src and copy the first 855 * 3 bytes to be the same as dev_addr 856 */ 857 random_ether_addr(nic_src); 858 memcpy(nic_src, dev_addr, 3); 859 860 /* Copy the nic_dest from dev_addr*/ 861 memcpy(nic_dest, dev_addr, ETH_ALEN); 862} 863 864static void validate_mac_address(u8 *mac_address) 865{ 866 /* if zero address or multicast bit set, restore the default value */ 867 if (is_zero_ether_addr(mac_address) || (mac_address[0] & 0x01)) { 868 pr_err("MAC invalid, restoring default\n"); 869 memcpy(mac_address, gdm_lte_macaddr, 6); 870 } 871} 872 873int register_lte_device(struct phy_dev *phy_dev, 874 struct device *dev, u8 *mac_address) 875{ 876 struct nic *nic; 877 struct net_device *net; 878 char pdn_dev_name[16]; 879 int ret = 0; 880 u8 index; 881 882 validate_mac_address(mac_address); 883 884 for (index = 0; index < MAX_NIC_TYPE; index++) { 885 /* Create device name lteXpdnX */ 886 sprintf(pdn_dev_name, "lte%%dpdn%d", index); 887 888 /* Allocate netdev */ 889 net = alloc_netdev(sizeof(struct nic), pdn_dev_name, 890 NET_NAME_UNKNOWN, ether_setup); 891 if (net == NULL) { 892 pr_err("alloc_netdev failed\n"); 893 ret = -ENOMEM; 894 goto err; 895 } 896 net->netdev_ops = &gdm_netdev_ops; 897 net->flags &= ~IFF_MULTICAST; 898 net->mtu = DEFAULT_MTU_SIZE; 899 900 nic = netdev_priv(net); 901 memset(nic, 0, sizeof(struct nic)); 902 nic->netdev = net; 903 nic->phy_dev = phy_dev; 904 nic->nic_id = index; 905 906 form_mac_address( 907 net->dev_addr, 908 nic->src_mac_addr, 909 nic->dest_mac_addr, 910 mac_address, 911 index); 912 913 SET_NETDEV_DEV(net, dev); 914 SET_NETDEV_DEVTYPE(net, &wwan_type); 915 916 ret = register_netdev(net); 917 if (ret) 918 goto err; 919 920 netif_carrier_on(net); 921 922 phy_dev->dev[index] = net; 923 } 924 925 return 0; 926 927err: 928 unregister_lte_device(phy_dev); 929 930 return ret; 931} 932 933void unregister_lte_device(struct phy_dev *phy_dev) 934{ 935 struct net_device *net; 936 int index; 937 938 for (index = 0; index < MAX_NIC_TYPE; index++) { 939 net = phy_dev->dev[index]; 940 if (net == NULL) 941 continue; 942 943 unregister_netdev(net); 944 free_netdev(net); 945 } 946} 947