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- /*
- * 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) {
- netlink_exit(lte_event.sock);
- 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
- */
- random_ether_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);
- }
- }
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