Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 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 | |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 14 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 15 | |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 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> |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 24 | #include <linux/in6.h> |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 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" |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 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 | |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 47 | #define IP_VERSION_4 4 |
| 48 | #define IP_VERSION_6 6 |
| 49 | |
| 50 | static struct { |
| 51 | int ref_cnt; |
| 52 | struct sock *sock; |
| 53 | } lte_event; |
| 54 | |
| 55 | static struct device_type wwan_type = { |
| 56 | .name = "wwan", |
| 57 | }; |
| 58 | |
| 59 | static int gdm_lte_open(struct net_device *dev) |
| 60 | { |
| 61 | netif_start_queue(dev); |
| 62 | return 0; |
| 63 | } |
| 64 | |
| 65 | static int gdm_lte_close(struct net_device *dev) |
| 66 | { |
| 67 | netif_stop_queue(dev); |
| 68 | return 0; |
| 69 | } |
| 70 | |
| 71 | static 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 | |
| 78 | static 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 | |
| 86 | static 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) { |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 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 | |
Valentina Manea | ff52b8f | 2013-10-08 13:21:26 +0300 | [diff] [blame] | 101 | static int gdm_lte_emulate_arp(struct sk_buff *skb_in, u32 nic_type) |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 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); |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 134 | arp_data_in = (struct arpdata *)(skb_in->data + mac_header_len + |
| 135 | sizeof(struct arphdr)); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 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 | |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 164 | memcpy(skb_put(skb_out, mac_header_len), mac_header_data, |
Ioana Ciornei | a4785ef | 2015-10-18 15:51:48 +0300 | [diff] [blame] | 165 | mac_header_len); |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 166 | memcpy(skb_put(skb_out, sizeof(struct arphdr)), arp_out, |
Ioana Ciornei | a4785ef | 2015-10-18 15:51:48 +0300 | [diff] [blame] | 167 | sizeof(struct arphdr)); |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 168 | memcpy(skb_put(skb_out, sizeof(struct arpdata)), arp_data_out, |
Ioana Ciornei | a4785ef | 2015-10-18 15:51:48 +0300 | [diff] [blame] | 169 | sizeof(struct arpdata)); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 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 | |
Valentina Manea | ff52b8f | 2013-10-08 13:21:26 +0300 | [diff] [blame] | 181 | static int icmp6_checksum(struct ipv6hdr *ipv6, u16 *ptr, int len) |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 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; |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 205 | for (i = 0; i < ARRAY_SIZE(pseudo_header.pa); i++) |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 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 | |
Valentina Manea | ff52b8f | 2013-10-08 13:21:26 +0300 | [diff] [blame] | 221 | static int gdm_lte_emulate_ndp(struct sk_buff *skb_in, u32 nic_type) |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 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 */ |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 267 | icmp6_in = (struct icmp6hdr *)(skb_in->data + mac_header_len + |
| 268 | sizeof(struct ipv6hdr)); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 269 | if (icmp6_in->icmp6_type == NDISC_ROUTER_SOLICITATION) { /* Check RS */ |
| 270 | return -1; |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 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)]; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 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; |
Ning Zhou | 59215e69 | 2015-01-04 10:06:17 +0100 | [diff] [blame] | 284 | /* R=0, S=1, O=1 */ |
| 285 | icmp6_out.icmp6_dataun.un_data32[0] = htonl(0x60000000); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 286 | |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 287 | ns = (struct neighbour_solicitation *) |
| 288 | (skb_in->data + mac_header_len + |
| 289 | sizeof(struct ipv6hdr) + sizeof(struct icmp6hdr)); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 290 | memcpy(&na.target_address, ns->target_address, 16); |
| 291 | na.type = 0x02; |
| 292 | na.length = 1; |
| 293 | na.link_layer_address[0] = 0x00; |
| 294 | na.link_layer_address[1] = 0x0a; |
| 295 | na.link_layer_address[2] = 0x3b; |
| 296 | na.link_layer_address[3] = 0xaf; |
| 297 | na.link_layer_address[4] = 0x63; |
| 298 | na.link_layer_address[5] = 0xc7; |
| 299 | |
| 300 | memcpy(&ipv6_out, ipv6_in, sizeof(struct ipv6hdr)); |
| 301 | memcpy(ipv6_out.saddr.in6_u.u6_addr8, &na.target_address, 16); |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 302 | memcpy(ipv6_out.daddr.in6_u.u6_addr8, |
Ioana Ciornei | a4785ef | 2015-10-18 15:51:48 +0300 | [diff] [blame] | 303 | ipv6_in->saddr.in6_u.u6_addr8, 16); |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 304 | ipv6_out.payload_len = htons(sizeof(struct icmp6hdr) + |
| 305 | sizeof(struct neighbour_advertisement)); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 306 | |
| 307 | memcpy(icmp_na, &icmp6_out, sizeof(struct icmp6hdr)); |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 308 | memcpy(icmp_na + sizeof(struct icmp6hdr), &na, |
Ioana Ciornei | a4785ef | 2015-10-18 15:51:48 +0300 | [diff] [blame] | 309 | sizeof(struct neighbour_advertisement)); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 310 | |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 311 | icmp6_out.icmp6_cksum = icmp6_checksum(&ipv6_out, |
| 312 | (u16 *)icmp_na, sizeof(icmp_na)); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 313 | } else { |
| 314 | return -1; |
| 315 | } |
| 316 | |
| 317 | /* Fill the destination mac with source mac of the received packet */ |
| 318 | memcpy(mac_header_data, mac_header_data + ETH_ALEN, ETH_ALEN); |
| 319 | /* Fill the source mac with nic's source mac */ |
| 320 | memcpy(mac_header_data + ETH_ALEN, nic->src_mac_addr, ETH_ALEN); |
| 321 | |
| 322 | /* Alloc skb and reserve align */ |
| 323 | skb_out = dev_alloc_skb(skb_in->len); |
| 324 | if (!skb_out) |
| 325 | return -ENOMEM; |
| 326 | skb_reserve(skb_out, NET_IP_ALIGN); |
| 327 | |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 328 | memcpy(skb_put(skb_out, mac_header_len), mac_header_data, |
Ioana Ciornei | a4785ef | 2015-10-18 15:51:48 +0300 | [diff] [blame] | 329 | mac_header_len); |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 330 | memcpy(skb_put(skb_out, sizeof(struct ipv6hdr)), &ipv6_out, |
Ioana Ciornei | a4785ef | 2015-10-18 15:51:48 +0300 | [diff] [blame] | 331 | sizeof(struct ipv6hdr)); |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 332 | memcpy(skb_put(skb_out, sizeof(struct icmp6hdr)), &icmp6_out, |
Ioana Ciornei | a4785ef | 2015-10-18 15:51:48 +0300 | [diff] [blame] | 333 | sizeof(struct icmp6hdr)); |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 334 | memcpy(skb_put(skb_out, sizeof(struct neighbour_advertisement)), &na, |
Ioana Ciornei | a4785ef | 2015-10-18 15:51:48 +0300 | [diff] [blame] | 335 | sizeof(struct neighbour_advertisement)); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 336 | |
| 337 | skb_out->protocol = ((struct ethhdr *)mac_header_data)->h_proto; |
| 338 | skb_out->dev = skb_in->dev; |
| 339 | skb_reset_mac_header(skb_out); |
| 340 | skb_pull(skb_out, ETH_HLEN); |
| 341 | |
| 342 | gdm_lte_rx(skb_out, nic, nic_type); |
| 343 | |
| 344 | return 0; |
| 345 | } |
| 346 | |
| 347 | static s32 gdm_lte_tx_nic_type(struct net_device *dev, struct sk_buff *skb) |
| 348 | { |
| 349 | struct nic *nic = netdev_priv(dev); |
| 350 | struct ethhdr *eth; |
| 351 | struct vlan_ethhdr *vlan_eth; |
| 352 | struct iphdr *ip; |
| 353 | struct ipv6hdr *ipv6; |
| 354 | int mac_proto; |
| 355 | void *network_data; |
| 356 | u32 nic_type = 0; |
| 357 | |
| 358 | /* NIC TYPE is based on the nic_id of this net_device */ |
| 359 | nic_type = 0x00000010 | nic->nic_id; |
| 360 | |
| 361 | /* Get ethernet protocol */ |
| 362 | eth = (struct ethhdr *)skb->data; |
| 363 | if (ntohs(eth->h_proto) == ETH_P_8021Q) { |
| 364 | vlan_eth = (struct vlan_ethhdr *)skb->data; |
| 365 | mac_proto = ntohs(vlan_eth->h_vlan_encapsulated_proto); |
| 366 | network_data = skb->data + VLAN_ETH_HLEN; |
| 367 | nic_type |= NIC_TYPE_F_VLAN; |
| 368 | } else { |
| 369 | mac_proto = ntohs(eth->h_proto); |
| 370 | network_data = skb->data + ETH_HLEN; |
| 371 | } |
| 372 | |
| 373 | /* Process packet for nic type */ |
| 374 | switch (mac_proto) { |
| 375 | case ETH_P_ARP: |
| 376 | nic_type |= NIC_TYPE_ARP; |
| 377 | break; |
| 378 | case ETH_P_IP: |
| 379 | nic_type |= NIC_TYPE_F_IPV4; |
Shraddha Barke | 2594ca3 | 2015-10-15 00:58:20 +0530 | [diff] [blame] | 380 | ip = network_data; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 381 | |
| 382 | /* Check DHCPv4 */ |
| 383 | if (ip->protocol == IPPROTO_UDP) { |
Shraddha Barke | 2594ca3 | 2015-10-15 00:58:20 +0530 | [diff] [blame] | 384 | struct udphdr *udp = |
Janani Ravichandran | e3b0786 | 2016-02-11 17:01:01 -0500 | [diff] [blame] | 385 | network_data + sizeof(struct iphdr); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 386 | if (ntohs(udp->dest) == 67 || ntohs(udp->dest) == 68) |
| 387 | nic_type |= NIC_TYPE_F_DHCP; |
| 388 | } |
| 389 | break; |
| 390 | case ETH_P_IPV6: |
| 391 | nic_type |= NIC_TYPE_F_IPV6; |
Shraddha Barke | 2594ca3 | 2015-10-15 00:58:20 +0530 | [diff] [blame] | 392 | ipv6 = network_data; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 393 | |
| 394 | if (ipv6->nexthdr == IPPROTO_ICMPV6) /* Check NDP request */ { |
Shraddha Barke | 2594ca3 | 2015-10-15 00:58:20 +0530 | [diff] [blame] | 395 | struct icmp6hdr *icmp6 = |
Janani Ravichandran | e3b0786 | 2016-02-11 17:01:01 -0500 | [diff] [blame] | 396 | network_data + sizeof(struct ipv6hdr); |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 397 | if (icmp6->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 398 | nic_type |= NIC_TYPE_ICMPV6; |
| 399 | } else if (ipv6->nexthdr == IPPROTO_UDP) /* Check DHCPv6 */ { |
Shraddha Barke | 2594ca3 | 2015-10-15 00:58:20 +0530 | [diff] [blame] | 400 | struct udphdr *udp = |
Janani Ravichandran | e3b0786 | 2016-02-11 17:01:01 -0500 | [diff] [blame] | 401 | network_data + sizeof(struct ipv6hdr); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 402 | if (ntohs(udp->dest) == 546 || ntohs(udp->dest) == 547) |
| 403 | nic_type |= NIC_TYPE_F_DHCP; |
| 404 | } |
| 405 | break; |
| 406 | default: |
| 407 | break; |
| 408 | } |
| 409 | |
| 410 | return nic_type; |
| 411 | } |
| 412 | |
| 413 | static int gdm_lte_tx(struct sk_buff *skb, struct net_device *dev) |
| 414 | { |
| 415 | struct nic *nic = netdev_priv(dev); |
| 416 | u32 nic_type; |
| 417 | void *data_buf; |
| 418 | int data_len; |
| 419 | int idx; |
| 420 | int ret = 0; |
| 421 | |
| 422 | nic_type = gdm_lte_tx_nic_type(dev, skb); |
| 423 | if (nic_type == 0) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 424 | netdev_err(dev, "tx - invalid nic_type\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 425 | return -1; |
| 426 | } |
| 427 | |
| 428 | if (nic_type & NIC_TYPE_ARP) { |
| 429 | if (gdm_lte_emulate_arp(skb, nic_type) == 0) { |
| 430 | dev_kfree_skb(skb); |
| 431 | return 0; |
| 432 | } |
| 433 | } |
| 434 | |
| 435 | if (nic_type & NIC_TYPE_ICMPV6) { |
| 436 | if (gdm_lte_emulate_ndp(skb, nic_type) == 0) { |
| 437 | dev_kfree_skb(skb); |
| 438 | return 0; |
| 439 | } |
| 440 | } |
| 441 | |
| 442 | /* |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 443 | * Need byte shift (that is, remove VLAN tag) if there is one |
| 444 | * For the case of ARP, this breaks the offset as vlan_ethhdr+4 |
| 445 | * is treated as ethhdr However, it shouldn't be a problem as |
| 446 | * the response starts from arp_hdr and ethhdr is created by this |
| 447 | * driver based on the NIC mac |
| 448 | */ |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 449 | if (nic_type & NIC_TYPE_F_VLAN) { |
| 450 | struct vlan_ethhdr *vlan_eth = (struct vlan_ethhdr *)skb->data; |
Scott Weir | 4e13d41 | 2014-05-31 21:54:58 +1000 | [diff] [blame] | 451 | |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 452 | nic->vlan_id = ntohs(vlan_eth->h_vlan_TCI) & VLAN_VID_MASK; |
| 453 | data_buf = skb->data + (VLAN_ETH_HLEN - ETH_HLEN); |
| 454 | data_len = skb->len - (VLAN_ETH_HLEN - ETH_HLEN); |
| 455 | } else { |
| 456 | nic->vlan_id = 0; |
| 457 | data_buf = skb->data; |
| 458 | data_len = skb->len; |
| 459 | } |
| 460 | |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 461 | /* If it is a ICMPV6 packet, clear all the other bits : |
| 462 | * for backward compatibility with the firmware |
| 463 | */ |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 464 | if (nic_type & NIC_TYPE_ICMPV6) |
| 465 | nic_type = NIC_TYPE_ICMPV6; |
| 466 | |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 467 | /* If it is not a dhcp packet, clear all the flag bits : |
| 468 | * original NIC, otherwise the special flag (IPVX | DHCP) |
| 469 | */ |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 470 | if (!(nic_type & NIC_TYPE_F_DHCP)) |
| 471 | nic_type &= NIC_TYPE_MASK; |
| 472 | |
Monam Agarwal | a28bfd1 | 2014-03-16 15:38:39 +0530 | [diff] [blame] | 473 | ret = sscanf(dev->name, "lte%d", &idx); |
| 474 | if (ret != 1) { |
| 475 | dev_kfree_skb(skb); |
| 476 | return -EINVAL; |
| 477 | } |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 478 | |
Rashika Kheria | a23bb46 | 2013-11-11 12:09:58 +0530 | [diff] [blame] | 479 | ret = nic->phy_dev->send_sdu_func(nic->phy_dev->priv_dev, |
| 480 | data_buf, data_len, |
| 481 | nic->pdn_table.dft_eps_id, 0, |
| 482 | tx_complete, nic, idx, |
| 483 | nic_type); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 484 | |
| 485 | if (ret == TX_NO_BUFFER || ret == TX_NO_SPC) { |
| 486 | netif_stop_queue(dev); |
| 487 | if (ret == TX_NO_BUFFER) |
| 488 | ret = 0; |
| 489 | else |
| 490 | ret = -ENOSPC; |
| 491 | } else if (ret == TX_NO_DEV) { |
| 492 | ret = -ENODEV; |
| 493 | } |
| 494 | |
| 495 | /* Updates tx stats */ |
| 496 | if (ret) { |
| 497 | nic->stats.tx_dropped++; |
| 498 | } else { |
| 499 | nic->stats.tx_packets++; |
| 500 | nic->stats.tx_bytes += data_len; |
| 501 | } |
| 502 | dev_kfree_skb(skb); |
| 503 | |
| 504 | return 0; |
| 505 | } |
| 506 | |
| 507 | static struct net_device_stats *gdm_lte_stats(struct net_device *dev) |
| 508 | { |
| 509 | struct nic *nic = netdev_priv(dev); |
Scott Weir | 4e13d41 | 2014-05-31 21:54:58 +1000 | [diff] [blame] | 510 | |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 511 | return &nic->stats; |
| 512 | } |
| 513 | |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 514 | static int gdm_lte_event_send(struct net_device *dev, char *buf, int len) |
| 515 | { |
| 516 | struct nic *nic = netdev_priv(dev); |
| 517 | struct hci_packet *hci = (struct hci_packet *)buf; |
| 518 | int idx; |
Monam Agarwal | a28bfd1 | 2014-03-16 15:38:39 +0530 | [diff] [blame] | 519 | int ret; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 520 | |
Monam Agarwal | a28bfd1 | 2014-03-16 15:38:39 +0530 | [diff] [blame] | 521 | ret = sscanf(dev->name, "lte%d", &idx); |
| 522 | if (ret != 1) |
| 523 | return -EINVAL; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 524 | |
| 525 | return netlink_send(lte_event.sock, idx, 0, buf, |
Rashika Kheria | 04db9c6 | 2013-11-07 20:28:40 +0530 | [diff] [blame] | 526 | gdm_dev16_to_cpu( |
| 527 | nic->phy_dev->get_endian( |
| 528 | nic->phy_dev->priv_dev), hci->len) |
| 529 | + HCI_HEADER_SIZE); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 530 | } |
| 531 | |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 532 | static void gdm_lte_event_rcv(struct net_device *dev, u16 type, |
Ioana Ciornei | a4785ef | 2015-10-18 15:51:48 +0300 | [diff] [blame] | 533 | void *msg, int len) |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 534 | { |
| 535 | struct nic *nic = netdev_priv(dev); |
| 536 | |
Rashika Kheria | abb40c11 | 2013-11-07 20:29:23 +0530 | [diff] [blame] | 537 | nic->phy_dev->send_hci_func(nic->phy_dev->priv_dev, msg, len, NULL, |
| 538 | NULL); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 539 | } |
| 540 | |
| 541 | int gdm_lte_event_init(void) |
| 542 | { |
| 543 | if (lte_event.ref_cnt == 0) |
| 544 | lte_event.sock = netlink_init(NETLINK_LTE, gdm_lte_event_rcv); |
| 545 | |
| 546 | if (lte_event.sock) { |
| 547 | lte_event.ref_cnt++; |
| 548 | return 0; |
| 549 | } |
| 550 | |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 551 | pr_err("event init failed\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 552 | return -1; |
| 553 | } |
| 554 | |
| 555 | void gdm_lte_event_exit(void) |
| 556 | { |
| 557 | if (lte_event.sock && --lte_event.ref_cnt == 0) { |
Amitoj Kaur Chawla | ca3fde1 | 2015-10-30 02:29:03 +0530 | [diff] [blame] | 558 | sock_release(lte_event.sock->sk_socket); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 559 | lte_event.sock = NULL; |
| 560 | } |
| 561 | } |
| 562 | |
| 563 | static u8 find_dev_index(u32 nic_type) |
| 564 | { |
| 565 | u8 index; |
| 566 | |
| 567 | index = (u8)(nic_type & 0x0000000f); |
| 568 | if (index > MAX_NIC_TYPE) |
| 569 | index = 0; |
| 570 | |
| 571 | return index; |
| 572 | } |
| 573 | |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 574 | static void gdm_lte_netif_rx(struct net_device *dev, char *buf, |
Ioana Ciornei | a4785ef | 2015-10-18 15:51:48 +0300 | [diff] [blame] | 575 | int len, int flagged_nic_type) |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 576 | { |
| 577 | u32 nic_type; |
| 578 | struct nic *nic; |
| 579 | struct sk_buff *skb; |
| 580 | struct ethhdr eth; |
| 581 | struct vlan_ethhdr vlan_eth; |
| 582 | void *mac_header_data; |
| 583 | u32 mac_header_len; |
| 584 | char ip_version = 0; |
| 585 | |
| 586 | nic_type = flagged_nic_type & NIC_TYPE_MASK; |
| 587 | nic = netdev_priv(dev); |
| 588 | |
| 589 | if (flagged_nic_type & NIC_TYPE_F_DHCP) { |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 590 | /* Change the destination mac address |
| 591 | * with the one requested the IP |
| 592 | */ |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 593 | if (flagged_nic_type & NIC_TYPE_F_IPV4) { |
| 594 | struct dhcp_packet { |
| 595 | u8 op; /* BOOTREQUEST or BOOTREPLY */ |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 596 | u8 htype; /* hardware address type. |
| 597 | * 1 = 10mb ethernet |
| 598 | */ |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 599 | u8 hlen; /* hardware address length */ |
| 600 | u8 hops; /* used by relay agents only */ |
| 601 | u32 xid; /* unique id */ |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 602 | u16 secs; /* elapsed since client began |
| 603 | * acquisition/renewal |
| 604 | */ |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 605 | u16 flags; /* only one flag so far: */ |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 606 | #define BROADCAST_FLAG 0x8000 |
| 607 | /* "I need broadcast replies" */ |
| 608 | u32 ciaddr; /* client IP (if client is in |
| 609 | * BOUND, RENEW or REBINDING state) |
| 610 | */ |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 611 | u32 yiaddr; /* 'your' (client) IP address */ |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 612 | /* IP address of next server to use in |
| 613 | * bootstrap, returned in DHCPOFFER, |
| 614 | * DHCPACK by server |
| 615 | */ |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 616 | u32 siaddr_nip; |
| 617 | u32 gateway_nip; /* relay agent IP address */ |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 618 | u8 chaddr[16]; /* link-layer client hardware |
| 619 | * address (MAC) |
| 620 | */ |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 621 | u8 sname[64]; /* server host name (ASCIZ) */ |
| 622 | u8 file[128]; /* boot file name (ASCIZ) */ |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 623 | u32 cookie; /* fixed first four option |
| 624 | * bytes (99,130,83,99 dec) |
| 625 | */ |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 626 | } __packed; |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 627 | void *addr = buf + sizeof(struct iphdr) + |
| 628 | sizeof(struct udphdr) + |
| 629 | offsetof(struct dhcp_packet, chaddr); |
Dilek Uzulmez | 3995213 | 2014-10-07 15:26:23 +0300 | [diff] [blame] | 630 | ether_addr_copy(nic->dest_mac_addr, addr); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 631 | } |
| 632 | } |
| 633 | |
| 634 | if (nic->vlan_id > 0) { |
| 635 | mac_header_data = (void *)&vlan_eth; |
| 636 | mac_header_len = VLAN_ETH_HLEN; |
| 637 | } else { |
| 638 | mac_header_data = (void *)ð |
| 639 | mac_header_len = ETH_HLEN; |
| 640 | } |
| 641 | |
| 642 | /* Format the data so that it can be put to skb */ |
Dilek Uzulmez | 3995213 | 2014-10-07 15:26:23 +0300 | [diff] [blame] | 643 | ether_addr_copy(mac_header_data, nic->dest_mac_addr); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 644 | memcpy(mac_header_data + ETH_ALEN, nic->src_mac_addr, ETH_ALEN); |
| 645 | |
| 646 | vlan_eth.h_vlan_TCI = htons(nic->vlan_id); |
| 647 | vlan_eth.h_vlan_proto = htons(ETH_P_8021Q); |
| 648 | |
| 649 | if (nic_type == NIC_TYPE_ARP) { |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 650 | /* Should be response: Only happens because |
| 651 | * there was a request from the host |
| 652 | */ |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 653 | eth.h_proto = htons(ETH_P_ARP); |
| 654 | vlan_eth.h_vlan_encapsulated_proto = htons(ETH_P_ARP); |
| 655 | } else { |
| 656 | ip_version = buf[0] >> 4; |
| 657 | if (ip_version == IP_VERSION_4) { |
| 658 | eth.h_proto = htons(ETH_P_IP); |
| 659 | vlan_eth.h_vlan_encapsulated_proto = htons(ETH_P_IP); |
| 660 | } else if (ip_version == IP_VERSION_6) { |
| 661 | eth.h_proto = htons(ETH_P_IPV6); |
| 662 | vlan_eth.h_vlan_encapsulated_proto = htons(ETH_P_IPV6); |
| 663 | } else { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 664 | netdev_err(dev, "Unknown IP version %d\n", ip_version); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 665 | return; |
| 666 | } |
| 667 | } |
| 668 | |
| 669 | /* Alloc skb and reserve align */ |
| 670 | skb = dev_alloc_skb(len + mac_header_len + NET_IP_ALIGN); |
| 671 | if (!skb) |
| 672 | return; |
| 673 | skb_reserve(skb, NET_IP_ALIGN); |
| 674 | |
| 675 | memcpy(skb_put(skb, mac_header_len), mac_header_data, mac_header_len); |
| 676 | memcpy(skb_put(skb, len), buf, len); |
| 677 | |
| 678 | skb->protocol = ((struct ethhdr *)mac_header_data)->h_proto; |
| 679 | skb->dev = dev; |
| 680 | skb_reset_mac_header(skb); |
| 681 | skb_pull(skb, ETH_HLEN); |
| 682 | |
| 683 | gdm_lte_rx(skb, nic, nic_type); |
| 684 | } |
| 685 | |
| 686 | static void gdm_lte_multi_sdu_pkt(struct phy_dev *phy_dev, char *buf, int len) |
| 687 | { |
| 688 | struct net_device *dev; |
| 689 | struct multi_sdu *multi_sdu = (struct multi_sdu *)buf; |
| 690 | struct sdu *sdu = NULL; |
| 691 | u8 *data = (u8 *)multi_sdu->data; |
| 692 | u16 i = 0; |
| 693 | u16 num_packet; |
| 694 | u16 hci_len; |
| 695 | u16 cmd_evt; |
| 696 | u32 nic_type; |
| 697 | u8 index; |
| 698 | |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 699 | hci_len = gdm_dev16_to_cpu(phy_dev->get_endian(phy_dev->priv_dev), |
Ioana Ciornei | a4785ef | 2015-10-18 15:51:48 +0300 | [diff] [blame] | 700 | multi_sdu->len); |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 701 | num_packet = gdm_dev16_to_cpu(phy_dev->get_endian(phy_dev->priv_dev), |
Ioana Ciornei | a4785ef | 2015-10-18 15:51:48 +0300 | [diff] [blame] | 702 | multi_sdu->num_packet); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 703 | |
| 704 | for (i = 0; i < num_packet; i++) { |
| 705 | sdu = (struct sdu *)data; |
| 706 | |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 707 | cmd_evt = gdm_dev16_to_cpu(phy_dev-> |
| 708 | get_endian(phy_dev->priv_dev), sdu->cmd_evt); |
| 709 | hci_len = gdm_dev16_to_cpu(phy_dev-> |
| 710 | get_endian(phy_dev->priv_dev), sdu->len); |
| 711 | nic_type = gdm_dev32_to_cpu(phy_dev-> |
| 712 | get_endian(phy_dev->priv_dev), sdu->nic_type); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 713 | |
| 714 | if (cmd_evt != LTE_RX_SDU) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 715 | pr_err("rx sdu wrong hci %04x\n", cmd_evt); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 716 | return; |
| 717 | } |
| 718 | if (hci_len < 12) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 719 | pr_err("rx sdu invalid len %d\n", hci_len); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 720 | return; |
| 721 | } |
| 722 | |
| 723 | index = find_dev_index(nic_type); |
| 724 | if (index < MAX_NIC_TYPE) { |
| 725 | dev = phy_dev->dev[index]; |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 726 | gdm_lte_netif_rx(dev, (char *)sdu->data, |
Ioana Ciornei | a4785ef | 2015-10-18 15:51:48 +0300 | [diff] [blame] | 727 | (int)(hci_len - 12), nic_type); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 728 | } else { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 729 | pr_err("rx sdu invalid nic_type :%x\n", nic_type); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 730 | } |
| 731 | |
Ioana Ciornei | ba7f55b | 2015-10-18 15:51:50 +0300 | [diff] [blame] | 732 | data += ((hci_len + 3) & 0xfffc) + HCI_HEADER_SIZE; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 733 | } |
| 734 | } |
| 735 | |
| 736 | static void gdm_lte_pdn_table(struct net_device *dev, char *buf, int len) |
| 737 | { |
| 738 | struct nic *nic = netdev_priv(dev); |
| 739 | struct hci_pdn_table_ind *pdn_table = (struct hci_pdn_table_ind *)buf; |
| 740 | |
| 741 | if (pdn_table->activate) { |
| 742 | nic->pdn_table.activate = pdn_table->activate; |
Rashika Kheria | 04db9c6 | 2013-11-07 20:28:40 +0530 | [diff] [blame] | 743 | nic->pdn_table.dft_eps_id = gdm_dev32_to_cpu( |
| 744 | nic->phy_dev->get_endian( |
| 745 | nic->phy_dev->priv_dev), |
| 746 | pdn_table->dft_eps_id); |
| 747 | nic->pdn_table.nic_type = gdm_dev32_to_cpu( |
| 748 | nic->phy_dev->get_endian( |
| 749 | nic->phy_dev->priv_dev), |
| 750 | pdn_table->nic_type); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 751 | |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 752 | netdev_info(dev, "pdn activated, nic_type=0x%x\n", |
| 753 | nic->pdn_table.nic_type); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 754 | } else { |
| 755 | memset(&nic->pdn_table, 0x00, sizeof(struct pdn_table)); |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 756 | netdev_info(dev, "pdn deactivated\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 757 | } |
| 758 | } |
| 759 | |
| 760 | static int gdm_lte_receive_pkt(struct phy_dev *phy_dev, char *buf, int len) |
| 761 | { |
| 762 | struct hci_packet *hci = (struct hci_packet *)buf; |
| 763 | struct hci_pdn_table_ind *pdn_table = (struct hci_pdn_table_ind *)buf; |
| 764 | struct sdu *sdu; |
| 765 | struct net_device *dev; |
| 766 | int ret = 0; |
| 767 | u16 cmd_evt; |
| 768 | u32 nic_type; |
| 769 | u8 index; |
| 770 | |
| 771 | if (!len) |
| 772 | return ret; |
| 773 | |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 774 | cmd_evt = gdm_dev16_to_cpu(phy_dev->get_endian(phy_dev->priv_dev), |
Ioana Ciornei | a4785ef | 2015-10-18 15:51:48 +0300 | [diff] [blame] | 775 | hci->cmd_evt); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 776 | |
| 777 | dev = phy_dev->dev[0]; |
Ioana Ciornei | b6f6fd8 | 2015-10-18 15:51:49 +0300 | [diff] [blame] | 778 | if (!dev) |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 779 | return 0; |
| 780 | |
| 781 | switch (cmd_evt) { |
| 782 | case LTE_RX_SDU: |
| 783 | sdu = (struct sdu *)hci->data; |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 784 | nic_type = gdm_dev32_to_cpu(phy_dev-> |
| 785 | get_endian(phy_dev->priv_dev), sdu->nic_type); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 786 | index = find_dev_index(nic_type); |
| 787 | dev = phy_dev->dev[index]; |
| 788 | gdm_lte_netif_rx(dev, hci->data, len, nic_type); |
| 789 | break; |
| 790 | case LTE_RX_MULTI_SDU: |
| 791 | gdm_lte_multi_sdu_pkt(phy_dev, buf, len); |
| 792 | break; |
| 793 | case LTE_LINK_ON_OFF_INDICATION: |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 794 | netdev_info(dev, "link %s\n", |
| 795 | ((struct hci_connect_ind *)buf)->connect |
| 796 | ? "on" : "off"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 797 | break; |
| 798 | case LTE_PDN_TABLE_IND: |
| 799 | pdn_table = (struct hci_pdn_table_ind *)buf; |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 800 | nic_type = gdm_dev32_to_cpu(phy_dev-> |
| 801 | get_endian(phy_dev->priv_dev), |
| 802 | pdn_table->nic_type); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 803 | index = find_dev_index(nic_type); |
| 804 | dev = phy_dev->dev[index]; |
| 805 | gdm_lte_pdn_table(dev, buf, len); |
| 806 | /* Fall through */ |
| 807 | default: |
| 808 | ret = gdm_lte_event_send(dev, buf, len); |
| 809 | break; |
| 810 | } |
| 811 | |
| 812 | return ret; |
| 813 | } |
| 814 | |
| 815 | static int rx_complete(void *arg, void *data, int len, int context) |
| 816 | { |
Shraddha Barke | 2594ca3 | 2015-10-15 00:58:20 +0530 | [diff] [blame] | 817 | struct phy_dev *phy_dev = arg; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 818 | |
Shraddha Barke | 2594ca3 | 2015-10-15 00:58:20 +0530 | [diff] [blame] | 819 | return gdm_lte_receive_pkt(phy_dev, data, len); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 820 | } |
| 821 | |
| 822 | void start_rx_proc(struct phy_dev *phy_dev) |
| 823 | { |
| 824 | int i; |
| 825 | |
| 826 | for (i = 0; i < MAX_RX_SUBMIT_COUNT; i++) |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 827 | phy_dev->rcv_func(phy_dev->priv_dev, |
| 828 | rx_complete, phy_dev, USB_COMPLETE); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 829 | } |
| 830 | |
Imre Deak | ce4b80f | 2016-09-11 19:48:08 +0300 | [diff] [blame] | 831 | static const struct net_device_ops gdm_netdev_ops = { |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 832 | .ndo_open = gdm_lte_open, |
| 833 | .ndo_stop = gdm_lte_close, |
| 834 | .ndo_set_config = gdm_lte_set_config, |
| 835 | .ndo_start_xmit = gdm_lte_tx, |
| 836 | .ndo_get_stats = gdm_lte_stats, |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 837 | }; |
| 838 | |
| 839 | static u8 gdm_lte_macaddr[ETH_ALEN] = {0x00, 0x0a, 0x3b, 0x00, 0x00, 0x00}; |
| 840 | |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 841 | static void form_mac_address(u8 *dev_addr, u8 *nic_src, u8 *nic_dest, |
Ioana Ciornei | a4785ef | 2015-10-18 15:51:48 +0300 | [diff] [blame] | 842 | u8 *mac_address, u8 index) |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 843 | { |
| 844 | /* Form the dev_addr */ |
| 845 | if (!mac_address) |
Dilek Uzulmez | 3995213 | 2014-10-07 15:26:23 +0300 | [diff] [blame] | 846 | ether_addr_copy(dev_addr, gdm_lte_macaddr); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 847 | else |
Dilek Uzulmez | 3995213 | 2014-10-07 15:26:23 +0300 | [diff] [blame] | 848 | ether_addr_copy(dev_addr, mac_address); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 849 | |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 850 | /* The last byte of the mac address |
| 851 | * should be less than or equal to 0xFC |
| 852 | */ |
Ioana Ciornei | ba7f55b | 2015-10-18 15:51:50 +0300 | [diff] [blame] | 853 | dev_addr[ETH_ALEN - 1] += index; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 854 | |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 855 | /* Create random nic src and copy the first |
| 856 | * 3 bytes to be the same as dev_addr |
| 857 | */ |
Bhumika Goyal | 4e4acff | 2016-03-02 01:13:22 +0530 | [diff] [blame] | 858 | eth_random_addr(nic_src); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 859 | memcpy(nic_src, dev_addr, 3); |
| 860 | |
| 861 | /* Copy the nic_dest from dev_addr*/ |
Dilek Uzulmez | 3995213 | 2014-10-07 15:26:23 +0300 | [diff] [blame] | 862 | ether_addr_copy(nic_dest, dev_addr); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 863 | } |
| 864 | |
| 865 | static void validate_mac_address(u8 *mac_address) |
| 866 | { |
| 867 | /* if zero address or multicast bit set, restore the default value */ |
| 868 | if (is_zero_ether_addr(mac_address) || (mac_address[0] & 0x01)) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 869 | pr_err("MAC invalid, restoring default\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 870 | memcpy(mac_address, gdm_lte_macaddr, 6); |
| 871 | } |
| 872 | } |
| 873 | |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 874 | int register_lte_device(struct phy_dev *phy_dev, |
| 875 | struct device *dev, u8 *mac_address) |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 876 | { |
| 877 | struct nic *nic; |
| 878 | struct net_device *net; |
| 879 | char pdn_dev_name[16]; |
| 880 | int ret = 0; |
| 881 | u8 index; |
| 882 | |
| 883 | validate_mac_address(mac_address); |
| 884 | |
| 885 | for (index = 0; index < MAX_NIC_TYPE; index++) { |
| 886 | /* Create device name lteXpdnX */ |
| 887 | sprintf(pdn_dev_name, "lte%%dpdn%d", index); |
| 888 | |
| 889 | /* Allocate netdev */ |
Gulsah Kose | 097b4d8 | 2014-03-14 20:12:17 +0200 | [diff] [blame] | 890 | net = alloc_netdev(sizeof(struct nic), pdn_dev_name, |
Tom Gundersen | c835a67 | 2014-07-14 16:37:24 +0200 | [diff] [blame] | 891 | NET_NAME_UNKNOWN, ether_setup); |
Somya Anand | 9d877fd | 2015-03-16 19:34:07 +0530 | [diff] [blame] | 892 | if (!net) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 893 | pr_err("alloc_netdev failed\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 894 | ret = -ENOMEM; |
| 895 | goto err; |
| 896 | } |
| 897 | net->netdev_ops = &gdm_netdev_ops; |
| 898 | net->flags &= ~IFF_MULTICAST; |
| 899 | net->mtu = DEFAULT_MTU_SIZE; |
| 900 | |
| 901 | nic = netdev_priv(net); |
| 902 | memset(nic, 0, sizeof(struct nic)); |
| 903 | nic->netdev = net; |
| 904 | nic->phy_dev = phy_dev; |
| 905 | nic->nic_id = index; |
| 906 | |
| 907 | form_mac_address( |
| 908 | net->dev_addr, |
| 909 | nic->src_mac_addr, |
| 910 | nic->dest_mac_addr, |
| 911 | mac_address, |
| 912 | index); |
| 913 | |
| 914 | SET_NETDEV_DEV(net, dev); |
| 915 | SET_NETDEV_DEVTYPE(net, &wwan_type); |
| 916 | |
| 917 | ret = register_netdev(net); |
| 918 | if (ret) |
| 919 | goto err; |
| 920 | |
| 921 | netif_carrier_on(net); |
| 922 | |
| 923 | phy_dev->dev[index] = net; |
| 924 | } |
| 925 | |
| 926 | return 0; |
| 927 | |
| 928 | err: |
| 929 | unregister_lte_device(phy_dev); |
| 930 | |
| 931 | return ret; |
| 932 | } |
| 933 | |
| 934 | void unregister_lte_device(struct phy_dev *phy_dev) |
| 935 | { |
| 936 | struct net_device *net; |
| 937 | int index; |
| 938 | |
| 939 | for (index = 0; index < MAX_NIC_TYPE; index++) { |
| 940 | net = phy_dev->dev[index]; |
Ioana Ciornei | b6f6fd8 | 2015-10-18 15:51:49 +0300 | [diff] [blame] | 941 | if (!net) |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 942 | continue; |
| 943 | |
| 944 | unregister_netdev(net); |
| 945 | free_netdev(net); |
| 946 | } |
| 947 | } |