| /* |
| * Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved. |
| * |
| * This software is licensed under the terms of the GNU General Public |
| * License version 2, as published by the Free Software Foundation, and |
| * may be copied, distributed, and modified under those terms. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #include <linux/etherdevice.h> |
| #include <linux/ip.h> |
| #include <linux/ipv6.h> |
| #include <linux/udp.h> |
| #include <linux/in.h> |
| #include <linux/if_arp.h> |
| #include <linux/if_ether.h> |
| #include <linux/if_vlan.h> |
| #include <linux/in6.h> |
| #include <linux/tcp.h> |
| #include <linux/icmp.h> |
| #include <linux/icmpv6.h> |
| #include <linux/uaccess.h> |
| #include <net/ndisc.h> |
| |
| #include "gdm_lte.h" |
| #include "netlink_k.h" |
| #include "hci.h" |
| #include "hci_packet.h" |
| #include "gdm_endian.h" |
| |
| /* |
| * Netlink protocol number |
| */ |
| #define NETLINK_LTE 30 |
| |
| /* |
| * Default MTU Size |
| */ |
| #define DEFAULT_MTU_SIZE 1500 |
| |
| #define IP_VERSION_4 4 |
| #define IP_VERSION_6 6 |
| |
| static struct { |
| int ref_cnt; |
| struct sock *sock; |
| } lte_event; |
| |
| static struct device_type wwan_type = { |
| .name = "wwan", |
| }; |
| |
| static int gdm_lte_open(struct net_device *dev) |
| { |
| netif_start_queue(dev); |
| return 0; |
| } |
| |
| static int gdm_lte_close(struct net_device *dev) |
| { |
| netif_stop_queue(dev); |
| return 0; |
| } |
| |
| static int gdm_lte_set_config(struct net_device *dev, struct ifmap *map) |
| { |
| if (dev->flags & IFF_UP) |
| return -EBUSY; |
| return 0; |
| } |
| |
| static void tx_complete(void *arg) |
| { |
| struct nic *nic = arg; |
| |
| if (netif_queue_stopped(nic->netdev)) |
| netif_wake_queue(nic->netdev); |
| } |
| |
| static int gdm_lte_rx(struct sk_buff *skb, struct nic *nic, int nic_type) |
| { |
| int ret; |
| |
| ret = netif_rx_ni(skb); |
| if (ret == NET_RX_DROP) { |
| nic->stats.rx_dropped++; |
| } else { |
| nic->stats.rx_packets++; |
| nic->stats.rx_bytes += skb->len + ETH_HLEN; |
| } |
| |
| return 0; |
| } |
| |
| static int gdm_lte_emulate_arp(struct sk_buff *skb_in, u32 nic_type) |
| { |
| struct nic *nic = netdev_priv(skb_in->dev); |
| struct sk_buff *skb_out; |
| struct ethhdr eth; |
| struct vlan_ethhdr vlan_eth; |
| struct arphdr *arp_in; |
| struct arphdr *arp_out; |
| struct arpdata { |
| u8 ar_sha[ETH_ALEN]; |
| u8 ar_sip[4]; |
| u8 ar_tha[ETH_ALEN]; |
| u8 ar_tip[4]; |
| }; |
| struct arpdata *arp_data_in; |
| struct arpdata *arp_data_out; |
| u8 arp_temp[60]; |
| void *mac_header_data; |
| u32 mac_header_len; |
| |
| /* Format the mac header so that it can be put to skb */ |
| if (ntohs(((struct ethhdr *)skb_in->data)->h_proto) == ETH_P_8021Q) { |
| memcpy(&vlan_eth, skb_in->data, sizeof(struct vlan_ethhdr)); |
| mac_header_data = &vlan_eth; |
| mac_header_len = VLAN_ETH_HLEN; |
| } else { |
| memcpy(ð, skb_in->data, sizeof(struct ethhdr)); |
| mac_header_data = ð |
| mac_header_len = ETH_HLEN; |
| } |
| |
| /* Get the pointer of the original request */ |
| arp_in = (struct arphdr *)(skb_in->data + mac_header_len); |
| arp_data_in = (struct arpdata *)(skb_in->data + mac_header_len + |
| sizeof(struct arphdr)); |
| |
| /* Get the pointer of the outgoing response */ |
| arp_out = (struct arphdr *)arp_temp; |
| arp_data_out = (struct arpdata *)(arp_temp + sizeof(struct arphdr)); |
| |
| /* Copy the arp header */ |
| memcpy(arp_out, arp_in, sizeof(struct arphdr)); |
| arp_out->ar_op = htons(ARPOP_REPLY); |
| |
| /* Copy the arp payload: based on 2 bytes of mac and fill the IP */ |
| arp_data_out->ar_sha[0] = arp_data_in->ar_sha[0]; |
| arp_data_out->ar_sha[1] = arp_data_in->ar_sha[1]; |
| memcpy(&arp_data_out->ar_sha[2], &arp_data_in->ar_tip[0], 4); |
| memcpy(&arp_data_out->ar_sip[0], &arp_data_in->ar_tip[0], 4); |
| memcpy(&arp_data_out->ar_tha[0], &arp_data_in->ar_sha[0], 6); |
| memcpy(&arp_data_out->ar_tip[0], &arp_data_in->ar_sip[0], 4); |
| |
| /* Fill the destination mac with source mac of the received packet */ |
| memcpy(mac_header_data, mac_header_data + ETH_ALEN, ETH_ALEN); |
| /* Fill the source mac with nic's source mac */ |
| memcpy(mac_header_data + ETH_ALEN, nic->src_mac_addr, ETH_ALEN); |
| |
| /* Alloc skb and reserve align */ |
| skb_out = dev_alloc_skb(skb_in->len); |
| if (!skb_out) |
| return -ENOMEM; |
| skb_reserve(skb_out, NET_IP_ALIGN); |
| |
| memcpy(skb_put(skb_out, mac_header_len), mac_header_data, |
| mac_header_len); |
| memcpy(skb_put(skb_out, sizeof(struct arphdr)), arp_out, |
| sizeof(struct arphdr)); |
| memcpy(skb_put(skb_out, sizeof(struct arpdata)), arp_data_out, |
| sizeof(struct arpdata)); |
| |
| skb_out->protocol = ((struct ethhdr *)mac_header_data)->h_proto; |
| skb_out->dev = skb_in->dev; |
| skb_reset_mac_header(skb_out); |
| skb_pull(skb_out, ETH_HLEN); |
| |
| gdm_lte_rx(skb_out, nic, nic_type); |
| |
| return 0; |
| } |
| |
| static int icmp6_checksum(struct ipv6hdr *ipv6, u16 *ptr, int len) |
| { |
| unsigned short *w = ptr; |
| int sum = 0; |
| int i; |
| |
| union { |
| struct { |
| u8 ph_src[16]; |
| u8 ph_dst[16]; |
| u32 ph_len; |
| u8 ph_zero[3]; |
| u8 ph_nxt; |
| } ph __packed; |
| u16 pa[20]; |
| } pseudo_header; |
| |
| memset(&pseudo_header, 0, sizeof(pseudo_header)); |
| memcpy(&pseudo_header.ph.ph_src, &ipv6->saddr.in6_u.u6_addr8, 16); |
| memcpy(&pseudo_header.ph.ph_dst, &ipv6->daddr.in6_u.u6_addr8, 16); |
| pseudo_header.ph.ph_len = ipv6->payload_len; |
| pseudo_header.ph.ph_nxt = ipv6->nexthdr; |
| |
| w = (u16 *)&pseudo_header; |
| for (i = 0; i < ARRAY_SIZE(pseudo_header.pa); i++) |
| sum += pseudo_header.pa[i]; |
| |
| w = ptr; |
| while (len > 1) { |
| sum += *w++; |
| len -= 2; |
| } |
| |
| sum = (sum >> 16) + (sum & 0xFFFF); |
| sum += (sum >> 16); |
| sum = ~sum & 0xffff; |
| |
| return sum; |
| } |
| |
| static int gdm_lte_emulate_ndp(struct sk_buff *skb_in, u32 nic_type) |
| { |
| struct nic *nic = netdev_priv(skb_in->dev); |
| struct sk_buff *skb_out; |
| struct ethhdr eth; |
| struct vlan_ethhdr vlan_eth; |
| struct neighbour_advertisement { |
| u8 target_address[16]; |
| u8 type; |
| u8 length; |
| u8 link_layer_address[6]; |
| }; |
| struct neighbour_advertisement na; |
| struct neighbour_solicitation { |
| u8 target_address[16]; |
| }; |
| struct neighbour_solicitation *ns; |
| struct ipv6hdr *ipv6_in; |
| struct ipv6hdr ipv6_out; |
| struct icmp6hdr *icmp6_in; |
| struct icmp6hdr icmp6_out; |
| |
| void *mac_header_data; |
| u32 mac_header_len; |
| |
| /* Format the mac header so that it can be put to skb */ |
| if (ntohs(((struct ethhdr *)skb_in->data)->h_proto) == ETH_P_8021Q) { |
| memcpy(&vlan_eth, skb_in->data, sizeof(struct vlan_ethhdr)); |
| if (ntohs(vlan_eth.h_vlan_encapsulated_proto) != ETH_P_IPV6) |
| return -1; |
| mac_header_data = &vlan_eth; |
| mac_header_len = VLAN_ETH_HLEN; |
| } else { |
| memcpy(ð, skb_in->data, sizeof(struct ethhdr)); |
| if (ntohs(eth.h_proto) != ETH_P_IPV6) |
| return -1; |
| mac_header_data = ð |
| mac_header_len = ETH_HLEN; |
| } |
| |
| /* Check if this is IPv6 ICMP packet */ |
| ipv6_in = (struct ipv6hdr *)(skb_in->data + mac_header_len); |
| if (ipv6_in->version != 6 || ipv6_in->nexthdr != IPPROTO_ICMPV6) |
| return -1; |
| |
| /* Check if this is NDP packet */ |
| icmp6_in = (struct icmp6hdr *)(skb_in->data + mac_header_len + |
| sizeof(struct ipv6hdr)); |
| if (icmp6_in->icmp6_type == NDISC_ROUTER_SOLICITATION) { /* Check RS */ |
| return -1; |
| } else if (icmp6_in->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) { |
| /* Check NS */ |
| u8 icmp_na[sizeof(struct icmp6hdr) + |
| sizeof(struct neighbour_advertisement)]; |
| u8 zero_addr8[16] = {0,}; |
| |
| if (memcmp(ipv6_in->saddr.in6_u.u6_addr8, zero_addr8, 16) == 0) |
| /* Duplicate Address Detection: Source IP is all zero */ |
| return 0; |
| |
| icmp6_out.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT; |
| icmp6_out.icmp6_code = 0; |
| icmp6_out.icmp6_cksum = 0; |
| /* R=0, S=1, O=1 */ |
| icmp6_out.icmp6_dataun.un_data32[0] = htonl(0x60000000); |
| |
| ns = (struct neighbour_solicitation *) |
| (skb_in->data + mac_header_len + |
| sizeof(struct ipv6hdr) + sizeof(struct icmp6hdr)); |
| memcpy(&na.target_address, ns->target_address, 16); |
| na.type = 0x02; |
| na.length = 1; |
| na.link_layer_address[0] = 0x00; |
| na.link_layer_address[1] = 0x0a; |
| na.link_layer_address[2] = 0x3b; |
| na.link_layer_address[3] = 0xaf; |
| na.link_layer_address[4] = 0x63; |
| na.link_layer_address[5] = 0xc7; |
| |
| memcpy(&ipv6_out, ipv6_in, sizeof(struct ipv6hdr)); |
| memcpy(ipv6_out.saddr.in6_u.u6_addr8, &na.target_address, 16); |
| memcpy(ipv6_out.daddr.in6_u.u6_addr8, |
| ipv6_in->saddr.in6_u.u6_addr8, 16); |
| ipv6_out.payload_len = htons(sizeof(struct icmp6hdr) + |
| sizeof(struct neighbour_advertisement)); |
| |
| memcpy(icmp_na, &icmp6_out, sizeof(struct icmp6hdr)); |
| memcpy(icmp_na + sizeof(struct icmp6hdr), &na, |
| sizeof(struct neighbour_advertisement)); |
| |
| icmp6_out.icmp6_cksum = icmp6_checksum(&ipv6_out, |
| (u16 *)icmp_na, sizeof(icmp_na)); |
| } else { |
| return -1; |
| } |
| |
| /* Fill the destination mac with source mac of the received packet */ |
| memcpy(mac_header_data, mac_header_data + ETH_ALEN, ETH_ALEN); |
| /* Fill the source mac with nic's source mac */ |
| memcpy(mac_header_data + ETH_ALEN, nic->src_mac_addr, ETH_ALEN); |
| |
| /* Alloc skb and reserve align */ |
| skb_out = dev_alloc_skb(skb_in->len); |
| if (!skb_out) |
| return -ENOMEM; |
| skb_reserve(skb_out, NET_IP_ALIGN); |
| |
| memcpy(skb_put(skb_out, mac_header_len), mac_header_data, |
| mac_header_len); |
| memcpy(skb_put(skb_out, sizeof(struct ipv6hdr)), &ipv6_out, |
| sizeof(struct ipv6hdr)); |
| memcpy(skb_put(skb_out, sizeof(struct icmp6hdr)), &icmp6_out, |
| sizeof(struct icmp6hdr)); |
| memcpy(skb_put(skb_out, sizeof(struct neighbour_advertisement)), &na, |
| sizeof(struct neighbour_advertisement)); |
| |
| skb_out->protocol = ((struct ethhdr *)mac_header_data)->h_proto; |
| skb_out->dev = skb_in->dev; |
| skb_reset_mac_header(skb_out); |
| skb_pull(skb_out, ETH_HLEN); |
| |
| gdm_lte_rx(skb_out, nic, nic_type); |
| |
| return 0; |
| } |
| |
| static s32 gdm_lte_tx_nic_type(struct net_device *dev, struct sk_buff *skb) |
| { |
| struct nic *nic = netdev_priv(dev); |
| struct ethhdr *eth; |
| struct vlan_ethhdr *vlan_eth; |
| struct iphdr *ip; |
| struct ipv6hdr *ipv6; |
| int mac_proto; |
| void *network_data; |
| u32 nic_type = 0; |
| |
| /* NIC TYPE is based on the nic_id of this net_device */ |
| nic_type = 0x00000010 | nic->nic_id; |
| |
| /* Get ethernet protocol */ |
| eth = (struct ethhdr *)skb->data; |
| if (ntohs(eth->h_proto) == ETH_P_8021Q) { |
| vlan_eth = (struct vlan_ethhdr *)skb->data; |
| mac_proto = ntohs(vlan_eth->h_vlan_encapsulated_proto); |
| network_data = skb->data + VLAN_ETH_HLEN; |
| nic_type |= NIC_TYPE_F_VLAN; |
| } else { |
| mac_proto = ntohs(eth->h_proto); |
| network_data = skb->data + ETH_HLEN; |
| } |
| |
| /* Process packet for nic type */ |
| switch (mac_proto) { |
| case ETH_P_ARP: |
| nic_type |= NIC_TYPE_ARP; |
| break; |
| case ETH_P_IP: |
| nic_type |= NIC_TYPE_F_IPV4; |
| ip = network_data; |
| |
| /* Check DHCPv4 */ |
| if (ip->protocol == IPPROTO_UDP) { |
| struct udphdr *udp = |
| network_data + sizeof(struct iphdr); |
| if (ntohs(udp->dest) == 67 || ntohs(udp->dest) == 68) |
| nic_type |= NIC_TYPE_F_DHCP; |
| } |
| break; |
| case ETH_P_IPV6: |
| nic_type |= NIC_TYPE_F_IPV6; |
| ipv6 = network_data; |
| |
| if (ipv6->nexthdr == IPPROTO_ICMPV6) /* Check NDP request */ { |
| struct icmp6hdr *icmp6 = |
| network_data + sizeof(struct ipv6hdr); |
| if (icmp6->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) |
| nic_type |= NIC_TYPE_ICMPV6; |
| } else if (ipv6->nexthdr == IPPROTO_UDP) /* Check DHCPv6 */ { |
| struct udphdr *udp = |
| network_data + sizeof(struct ipv6hdr); |
| if (ntohs(udp->dest) == 546 || ntohs(udp->dest) == 547) |
| nic_type |= NIC_TYPE_F_DHCP; |
| } |
| break; |
| default: |
| break; |
| } |
| |
| return nic_type; |
| } |
| |
| static int gdm_lte_tx(struct sk_buff *skb, struct net_device *dev) |
| { |
| struct nic *nic = netdev_priv(dev); |
| u32 nic_type; |
| void *data_buf; |
| int data_len; |
| int idx; |
| int ret = 0; |
| |
| nic_type = gdm_lte_tx_nic_type(dev, skb); |
| if (nic_type == 0) { |
| netdev_err(dev, "tx - invalid nic_type\n"); |
| return -1; |
| } |
| |
| if (nic_type & NIC_TYPE_ARP) { |
| if (gdm_lte_emulate_arp(skb, nic_type) == 0) { |
| dev_kfree_skb(skb); |
| return 0; |
| } |
| } |
| |
| if (nic_type & NIC_TYPE_ICMPV6) { |
| if (gdm_lte_emulate_ndp(skb, nic_type) == 0) { |
| dev_kfree_skb(skb); |
| return 0; |
| } |
| } |
| |
| /* |
| * Need byte shift (that is, remove VLAN tag) if there is one |
| * For the case of ARP, this breaks the offset as vlan_ethhdr+4 |
| * is treated as ethhdr However, it shouldn't be a problem as |
| * the response starts from arp_hdr and ethhdr is created by this |
| * driver based on the NIC mac |
| */ |
| if (nic_type & NIC_TYPE_F_VLAN) { |
| struct vlan_ethhdr *vlan_eth = (struct vlan_ethhdr *)skb->data; |
| |
| nic->vlan_id = ntohs(vlan_eth->h_vlan_TCI) & VLAN_VID_MASK; |
| data_buf = skb->data + (VLAN_ETH_HLEN - ETH_HLEN); |
| data_len = skb->len - (VLAN_ETH_HLEN - ETH_HLEN); |
| } else { |
| nic->vlan_id = 0; |
| data_buf = skb->data; |
| data_len = skb->len; |
| } |
| |
| /* If it is a ICMPV6 packet, clear all the other bits : |
| * for backward compatibility with the firmware |
| */ |
| if (nic_type & NIC_TYPE_ICMPV6) |
| nic_type = NIC_TYPE_ICMPV6; |
| |
| /* If it is not a dhcp packet, clear all the flag bits : |
| * original NIC, otherwise the special flag (IPVX | DHCP) |
| */ |
| if (!(nic_type & NIC_TYPE_F_DHCP)) |
| nic_type &= NIC_TYPE_MASK; |
| |
| ret = sscanf(dev->name, "lte%d", &idx); |
| if (ret != 1) { |
| dev_kfree_skb(skb); |
| return -EINVAL; |
| } |
| |
| ret = nic->phy_dev->send_sdu_func(nic->phy_dev->priv_dev, |
| data_buf, data_len, |
| nic->pdn_table.dft_eps_id, 0, |
| tx_complete, nic, idx, |
| nic_type); |
| |
| if (ret == TX_NO_BUFFER || ret == TX_NO_SPC) { |
| netif_stop_queue(dev); |
| if (ret == TX_NO_BUFFER) |
| ret = 0; |
| else |
| ret = -ENOSPC; |
| } else if (ret == TX_NO_DEV) { |
| ret = -ENODEV; |
| } |
| |
| /* Updates tx stats */ |
| if (ret) { |
| nic->stats.tx_dropped++; |
| } else { |
| nic->stats.tx_packets++; |
| nic->stats.tx_bytes += data_len; |
| } |
| dev_kfree_skb(skb); |
| |
| return 0; |
| } |
| |
| static struct net_device_stats *gdm_lte_stats(struct net_device *dev) |
| { |
| struct nic *nic = netdev_priv(dev); |
| |
| return &nic->stats; |
| } |
| |
| static int gdm_lte_event_send(struct net_device *dev, char *buf, int len) |
| { |
| struct nic *nic = netdev_priv(dev); |
| struct hci_packet *hci = (struct hci_packet *)buf; |
| int idx; |
| int ret; |
| |
| ret = sscanf(dev->name, "lte%d", &idx); |
| if (ret != 1) |
| return -EINVAL; |
| |
| return netlink_send(lte_event.sock, idx, 0, buf, |
| gdm_dev16_to_cpu( |
| nic->phy_dev->get_endian( |
| nic->phy_dev->priv_dev), hci->len) |
| + HCI_HEADER_SIZE); |
| } |
| |
| static void gdm_lte_event_rcv(struct net_device *dev, u16 type, |
| void *msg, int len) |
| { |
| struct nic *nic = netdev_priv(dev); |
| |
| nic->phy_dev->send_hci_func(nic->phy_dev->priv_dev, msg, len, NULL, |
| NULL); |
| } |
| |
| int gdm_lte_event_init(void) |
| { |
| if (lte_event.ref_cnt == 0) |
| lte_event.sock = netlink_init(NETLINK_LTE, gdm_lte_event_rcv); |
| |
| if (lte_event.sock) { |
| lte_event.ref_cnt++; |
| return 0; |
| } |
| |
| pr_err("event init failed\n"); |
| return -1; |
| } |
| |
| void gdm_lte_event_exit(void) |
| { |
| if (lte_event.sock && --lte_event.ref_cnt == 0) { |
| sock_release(lte_event.sock->sk_socket); |
| lte_event.sock = NULL; |
| } |
| } |
| |
| static u8 find_dev_index(u32 nic_type) |
| { |
| u8 index; |
| |
| index = (u8)(nic_type & 0x0000000f); |
| if (index > MAX_NIC_TYPE) |
| index = 0; |
| |
| return index; |
| } |
| |
| static void gdm_lte_netif_rx(struct net_device *dev, char *buf, |
| int len, int flagged_nic_type) |
| { |
| u32 nic_type; |
| struct nic *nic; |
| struct sk_buff *skb; |
| struct ethhdr eth; |
| struct vlan_ethhdr vlan_eth; |
| void *mac_header_data; |
| u32 mac_header_len; |
| char ip_version = 0; |
| |
| nic_type = flagged_nic_type & NIC_TYPE_MASK; |
| nic = netdev_priv(dev); |
| |
| if (flagged_nic_type & NIC_TYPE_F_DHCP) { |
| /* Change the destination mac address |
| * with the one requested the IP |
| */ |
| if (flagged_nic_type & NIC_TYPE_F_IPV4) { |
| struct dhcp_packet { |
| u8 op; /* BOOTREQUEST or BOOTREPLY */ |
| u8 htype; /* hardware address type. |
| * 1 = 10mb ethernet |
| */ |
| u8 hlen; /* hardware address length */ |
| u8 hops; /* used by relay agents only */ |
| u32 xid; /* unique id */ |
| u16 secs; /* elapsed since client began |
| * acquisition/renewal |
| */ |
| u16 flags; /* only one flag so far: */ |
| #define BROADCAST_FLAG 0x8000 |
| /* "I need broadcast replies" */ |
| u32 ciaddr; /* client IP (if client is in |
| * BOUND, RENEW or REBINDING state) |
| */ |
| u32 yiaddr; /* 'your' (client) IP address */ |
| /* IP address of next server to use in |
| * bootstrap, returned in DHCPOFFER, |
| * DHCPACK by server |
| */ |
| u32 siaddr_nip; |
| u32 gateway_nip; /* relay agent IP address */ |
| u8 chaddr[16]; /* link-layer client hardware |
| * address (MAC) |
| */ |
| u8 sname[64]; /* server host name (ASCIZ) */ |
| u8 file[128]; /* boot file name (ASCIZ) */ |
| u32 cookie; /* fixed first four option |
| * bytes (99,130,83,99 dec) |
| */ |
| } __packed; |
| void *addr = buf + sizeof(struct iphdr) + |
| sizeof(struct udphdr) + |
| offsetof(struct dhcp_packet, chaddr); |
| ether_addr_copy(nic->dest_mac_addr, addr); |
| } |
| } |
| |
| if (nic->vlan_id > 0) { |
| mac_header_data = (void *)&vlan_eth; |
| mac_header_len = VLAN_ETH_HLEN; |
| } else { |
| mac_header_data = (void *)ð |
| mac_header_len = ETH_HLEN; |
| } |
| |
| /* Format the data so that it can be put to skb */ |
| ether_addr_copy(mac_header_data, nic->dest_mac_addr); |
| memcpy(mac_header_data + ETH_ALEN, nic->src_mac_addr, ETH_ALEN); |
| |
| vlan_eth.h_vlan_TCI = htons(nic->vlan_id); |
| vlan_eth.h_vlan_proto = htons(ETH_P_8021Q); |
| |
| if (nic_type == NIC_TYPE_ARP) { |
| /* Should be response: Only happens because |
| * there was a request from the host |
| */ |
| eth.h_proto = htons(ETH_P_ARP); |
| vlan_eth.h_vlan_encapsulated_proto = htons(ETH_P_ARP); |
| } else { |
| ip_version = buf[0] >> 4; |
| if (ip_version == IP_VERSION_4) { |
| eth.h_proto = htons(ETH_P_IP); |
| vlan_eth.h_vlan_encapsulated_proto = htons(ETH_P_IP); |
| } else if (ip_version == IP_VERSION_6) { |
| eth.h_proto = htons(ETH_P_IPV6); |
| vlan_eth.h_vlan_encapsulated_proto = htons(ETH_P_IPV6); |
| } else { |
| netdev_err(dev, "Unknown IP version %d\n", ip_version); |
| return; |
| } |
| } |
| |
| /* Alloc skb and reserve align */ |
| skb = dev_alloc_skb(len + mac_header_len + NET_IP_ALIGN); |
| if (!skb) |
| return; |
| skb_reserve(skb, NET_IP_ALIGN); |
| |
| memcpy(skb_put(skb, mac_header_len), mac_header_data, mac_header_len); |
| memcpy(skb_put(skb, len), buf, len); |
| |
| skb->protocol = ((struct ethhdr *)mac_header_data)->h_proto; |
| skb->dev = dev; |
| skb_reset_mac_header(skb); |
| skb_pull(skb, ETH_HLEN); |
| |
| gdm_lte_rx(skb, nic, nic_type); |
| } |
| |
| static void gdm_lte_multi_sdu_pkt(struct phy_dev *phy_dev, char *buf, int len) |
| { |
| struct net_device *dev; |
| struct multi_sdu *multi_sdu = (struct multi_sdu *)buf; |
| struct sdu *sdu = NULL; |
| u8 *data = (u8 *)multi_sdu->data; |
| u16 i = 0; |
| u16 num_packet; |
| u16 hci_len; |
| u16 cmd_evt; |
| u32 nic_type; |
| u8 index; |
| |
| hci_len = gdm_dev16_to_cpu(phy_dev->get_endian(phy_dev->priv_dev), |
| multi_sdu->len); |
| num_packet = gdm_dev16_to_cpu(phy_dev->get_endian(phy_dev->priv_dev), |
| multi_sdu->num_packet); |
| |
| for (i = 0; i < num_packet; i++) { |
| sdu = (struct sdu *)data; |
| |
| cmd_evt = gdm_dev16_to_cpu(phy_dev-> |
| get_endian(phy_dev->priv_dev), sdu->cmd_evt); |
| hci_len = gdm_dev16_to_cpu(phy_dev-> |
| get_endian(phy_dev->priv_dev), sdu->len); |
| nic_type = gdm_dev32_to_cpu(phy_dev-> |
| get_endian(phy_dev->priv_dev), sdu->nic_type); |
| |
| if (cmd_evt != LTE_RX_SDU) { |
| pr_err("rx sdu wrong hci %04x\n", cmd_evt); |
| return; |
| } |
| if (hci_len < 12) { |
| pr_err("rx sdu invalid len %d\n", hci_len); |
| return; |
| } |
| |
| index = find_dev_index(nic_type); |
| if (index < MAX_NIC_TYPE) { |
| dev = phy_dev->dev[index]; |
| gdm_lte_netif_rx(dev, (char *)sdu->data, |
| (int)(hci_len - 12), nic_type); |
| } else { |
| pr_err("rx sdu invalid nic_type :%x\n", nic_type); |
| } |
| |
| data += ((hci_len + 3) & 0xfffc) + HCI_HEADER_SIZE; |
| } |
| } |
| |
| static void gdm_lte_pdn_table(struct net_device *dev, char *buf, int len) |
| { |
| struct nic *nic = netdev_priv(dev); |
| struct hci_pdn_table_ind *pdn_table = (struct hci_pdn_table_ind *)buf; |
| |
| if (pdn_table->activate) { |
| nic->pdn_table.activate = pdn_table->activate; |
| nic->pdn_table.dft_eps_id = gdm_dev32_to_cpu( |
| nic->phy_dev->get_endian( |
| nic->phy_dev->priv_dev), |
| pdn_table->dft_eps_id); |
| nic->pdn_table.nic_type = gdm_dev32_to_cpu( |
| nic->phy_dev->get_endian( |
| nic->phy_dev->priv_dev), |
| pdn_table->nic_type); |
| |
| netdev_info(dev, "pdn activated, nic_type=0x%x\n", |
| nic->pdn_table.nic_type); |
| } else { |
| memset(&nic->pdn_table, 0x00, sizeof(struct pdn_table)); |
| netdev_info(dev, "pdn deactivated\n"); |
| } |
| } |
| |
| static int gdm_lte_receive_pkt(struct phy_dev *phy_dev, char *buf, int len) |
| { |
| struct hci_packet *hci = (struct hci_packet *)buf; |
| struct hci_pdn_table_ind *pdn_table = (struct hci_pdn_table_ind *)buf; |
| struct sdu *sdu; |
| struct net_device *dev; |
| int ret = 0; |
| u16 cmd_evt; |
| u32 nic_type; |
| u8 index; |
| |
| if (!len) |
| return ret; |
| |
| cmd_evt = gdm_dev16_to_cpu(phy_dev->get_endian(phy_dev->priv_dev), |
| hci->cmd_evt); |
| |
| dev = phy_dev->dev[0]; |
| if (!dev) |
| return 0; |
| |
| switch (cmd_evt) { |
| case LTE_RX_SDU: |
| sdu = (struct sdu *)hci->data; |
| nic_type = gdm_dev32_to_cpu(phy_dev-> |
| get_endian(phy_dev->priv_dev), sdu->nic_type); |
| index = find_dev_index(nic_type); |
| dev = phy_dev->dev[index]; |
| gdm_lte_netif_rx(dev, hci->data, len, nic_type); |
| break; |
| case LTE_RX_MULTI_SDU: |
| gdm_lte_multi_sdu_pkt(phy_dev, buf, len); |
| break; |
| case LTE_LINK_ON_OFF_INDICATION: |
| netdev_info(dev, "link %s\n", |
| ((struct hci_connect_ind *)buf)->connect |
| ? "on" : "off"); |
| break; |
| case LTE_PDN_TABLE_IND: |
| pdn_table = (struct hci_pdn_table_ind *)buf; |
| nic_type = gdm_dev32_to_cpu(phy_dev-> |
| get_endian(phy_dev->priv_dev), |
| pdn_table->nic_type); |
| index = find_dev_index(nic_type); |
| dev = phy_dev->dev[index]; |
| gdm_lte_pdn_table(dev, buf, len); |
| /* Fall through */ |
| default: |
| ret = gdm_lte_event_send(dev, buf, len); |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static int rx_complete(void *arg, void *data, int len, int context) |
| { |
| struct phy_dev *phy_dev = arg; |
| |
| return gdm_lte_receive_pkt(phy_dev, data, len); |
| } |
| |
| void start_rx_proc(struct phy_dev *phy_dev) |
| { |
| int i; |
| |
| for (i = 0; i < MAX_RX_SUBMIT_COUNT; i++) |
| phy_dev->rcv_func(phy_dev->priv_dev, |
| rx_complete, phy_dev, USB_COMPLETE); |
| } |
| |
| static struct net_device_ops gdm_netdev_ops = { |
| .ndo_open = gdm_lte_open, |
| .ndo_stop = gdm_lte_close, |
| .ndo_set_config = gdm_lte_set_config, |
| .ndo_start_xmit = gdm_lte_tx, |
| .ndo_get_stats = gdm_lte_stats, |
| }; |
| |
| static u8 gdm_lte_macaddr[ETH_ALEN] = {0x00, 0x0a, 0x3b, 0x00, 0x00, 0x00}; |
| |
| static void form_mac_address(u8 *dev_addr, u8 *nic_src, u8 *nic_dest, |
| u8 *mac_address, u8 index) |
| { |
| /* Form the dev_addr */ |
| if (!mac_address) |
| ether_addr_copy(dev_addr, gdm_lte_macaddr); |
| else |
| ether_addr_copy(dev_addr, mac_address); |
| |
| /* The last byte of the mac address |
| * should be less than or equal to 0xFC |
| */ |
| dev_addr[ETH_ALEN - 1] += index; |
| |
| /* Create random nic src and copy the first |
| * 3 bytes to be the same as dev_addr |
| */ |
| eth_random_addr(nic_src); |
| memcpy(nic_src, dev_addr, 3); |
| |
| /* Copy the nic_dest from dev_addr*/ |
| ether_addr_copy(nic_dest, dev_addr); |
| } |
| |
| static void validate_mac_address(u8 *mac_address) |
| { |
| /* if zero address or multicast bit set, restore the default value */ |
| if (is_zero_ether_addr(mac_address) || (mac_address[0] & 0x01)) { |
| pr_err("MAC invalid, restoring default\n"); |
| memcpy(mac_address, gdm_lte_macaddr, 6); |
| } |
| } |
| |
| int register_lte_device(struct phy_dev *phy_dev, |
| struct device *dev, u8 *mac_address) |
| { |
| struct nic *nic; |
| struct net_device *net; |
| char pdn_dev_name[16]; |
| int ret = 0; |
| u8 index; |
| |
| validate_mac_address(mac_address); |
| |
| for (index = 0; index < MAX_NIC_TYPE; index++) { |
| /* Create device name lteXpdnX */ |
| sprintf(pdn_dev_name, "lte%%dpdn%d", index); |
| |
| /* Allocate netdev */ |
| net = alloc_netdev(sizeof(struct nic), pdn_dev_name, |
| NET_NAME_UNKNOWN, ether_setup); |
| if (!net) { |
| pr_err("alloc_netdev failed\n"); |
| ret = -ENOMEM; |
| goto err; |
| } |
| net->netdev_ops = &gdm_netdev_ops; |
| net->flags &= ~IFF_MULTICAST; |
| net->mtu = DEFAULT_MTU_SIZE; |
| |
| nic = netdev_priv(net); |
| memset(nic, 0, sizeof(struct nic)); |
| nic->netdev = net; |
| nic->phy_dev = phy_dev; |
| nic->nic_id = index; |
| |
| form_mac_address( |
| net->dev_addr, |
| nic->src_mac_addr, |
| nic->dest_mac_addr, |
| mac_address, |
| index); |
| |
| SET_NETDEV_DEV(net, dev); |
| SET_NETDEV_DEVTYPE(net, &wwan_type); |
| |
| ret = register_netdev(net); |
| if (ret) |
| goto err; |
| |
| netif_carrier_on(net); |
| |
| phy_dev->dev[index] = net; |
| } |
| |
| return 0; |
| |
| err: |
| unregister_lte_device(phy_dev); |
| |
| return ret; |
| } |
| |
| void unregister_lte_device(struct phy_dev *phy_dev) |
| { |
| struct net_device *net; |
| int index; |
| |
| for (index = 0; index < MAX_NIC_TYPE; index++) { |
| net = phy_dev->dev[index]; |
| if (!net) |
| continue; |
| |
| unregister_netdev(net); |
| free_netdev(net); |
| } |
| } |