--- /dev/null
+/*
+ * 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 = (struct iphdr *)network_data;
+
+ /* Check DHCPv4 */
+ if (ip->protocol == IPPROTO_UDP) {
+ struct udphdr *udp = (struct udphdr *)
+ (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 = (struct ipv6hdr *)network_data;
+
+ if (ipv6->nexthdr == IPPROTO_ICMPV6) /* Check NDP request */ {
+ struct icmp6hdr *icmp6 = (struct icmp6hdr *)
+ (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 = (struct udphdr *)
+ (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 == NULL)
+ 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 = (struct phy_dev *)arg;
+
+ return gdm_lte_receive_pkt(phy_dev, (char *)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 == NULL)
+ continue;
+
+ unregister_netdev(net);
+ free_netdev(net);
+ }
+}
Code Review / kvmfornfv.git / blobdiff