- 根目录:
- drivers
- staging
- gdm72xx
- gdm_qos.c
/*
* 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 <asm/byteorder.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/if_ether.h>
#include "gdm_wimax.h"
#include "hci.h"
#include "gdm_qos.h"
#define B2H(x) __be16_to_cpu(x)
#define MAX_FREE_LIST_CNT 32
static struct {
struct list_head head;
int cnt;
spinlock_t lock;
} qos_free_list;
static void init_qos_entry_list(void)
{
qos_free_list.cnt = 0;
INIT_LIST_HEAD(&qos_free_list.head);
spin_lock_init(&qos_free_list.lock);
}
static void *alloc_qos_entry(void)
{
struct qos_entry_s *entry;
unsigned long flags;
spin_lock_irqsave(&qos_free_list.lock, flags);
if (qos_free_list.cnt) {
entry = list_entry(qos_free_list.head.prev, struct qos_entry_s,
list);
list_del(&entry->list);
qos_free_list.cnt--;
spin_unlock_irqrestore(&qos_free_list.lock, flags);
return entry;
}
spin_unlock_irqrestore(&qos_free_list.lock, flags);
entry = kmalloc(sizeof(struct qos_entry_s), GFP_ATOMIC);
return entry;
}
static void free_qos_entry(void *entry)
{
struct qos_entry_s *qentry = (struct qos_entry_s *) entry;
unsigned long flags;
spin_lock_irqsave(&qos_free_list.lock, flags);
if (qos_free_list.cnt < MAX_FREE_LIST_CNT) {
list_add(&qentry->list, &qos_free_list.head);
qos_free_list.cnt++;
spin_unlock_irqrestore(&qos_free_list.lock, flags);
return;
}
spin_unlock_irqrestore(&qos_free_list.lock, flags);
kfree(entry);
}
static void free_qos_entry_list(struct list_head *free_list)
{
struct qos_entry_s *entry, *n;
int total_free = 0;
list_for_each_entry_safe(entry, n, free_list, list) {
list_del(&entry->list);
kfree(entry);
total_free++;
}
pr_debug("%s: total_free_cnt=%d\n", __func__, total_free);
}
void gdm_qos_init(void *nic_ptr)
{
struct nic *nic = nic_ptr;
struct qos_cb_s *qcb = &nic->qos;
int i;
for (i = 0 ; i < QOS_MAX; i++) {
INIT_LIST_HEAD(&qcb->qos_list[i]);
qcb->csr[i].qos_buf_count = 0;
qcb->csr[i].enabled = 0;
}
qcb->qos_list_cnt = 0;
qcb->qos_null_idx = QOS_MAX-1;
qcb->qos_limit_size = 255;
spin_lock_init(&qcb->qos_lock);
init_qos_entry_list();
}
void gdm_qos_release_list(void *nic_ptr)
{
struct nic *nic = nic_ptr;
struct qos_cb_s *qcb = &nic->qos;
unsigned long flags;
struct qos_entry_s *entry, *n;
struct list_head free_list;
int i;
INIT_LIST_HEAD(&free_list);
spin_lock_irqsave(&qcb->qos_lock, flags);
for (i = 0; i < QOS_MAX; i++) {
qcb->csr[i].qos_buf_count = 0;
qcb->csr[i].enabled = 0;
}
qcb->qos_list_cnt = 0;
qcb->qos_null_idx = QOS_MAX-1;
for (i = 0; i < QOS_MAX; i++) {
list_for_each_entry_safe(entry, n, &qcb->qos_list[i], list) {
list_move_tail(&entry->list, &free_list);
}
}
spin_unlock_irqrestore(&qcb->qos_lock, flags);
free_qos_entry_list(&free_list);
}
static u32 chk_ipv4_rule(struct gdm_wimax_csr_s *csr, u8 *Stream, u8 *port)
{
int i;
if (csr->classifier_rule_en&IPTYPEOFSERVICE) {
if (((Stream[1] & csr->ip2s_mask) < csr->ip2s_lo) ||
((Stream[1] & csr->ip2s_mask) > csr->ip2s_hi))
return 1;
}
if (csr->classifier_rule_en&PROTOCOL) {
if (Stream[9] != csr->protocol)
return 1;
}
if (csr->classifier_rule_en&IPMASKEDSRCADDRESS) {
for (i = 0; i < 4; i++) {
if ((Stream[12 + i] & csr->ipsrc_addrmask[i]) !=
(csr->ipsrc_addr[i] & csr->ipsrc_addrmask[i]))
return 1;
}
}
if (csr->classifier_rule_en&IPMASKEDDSTADDRESS) {
for (i = 0; i < 4; i++) {
if ((Stream[16 + i] & csr->ipdst_addrmask[i]) !=
(csr->ipdst_addr[i] & csr->ipdst_addrmask[i]))
return 1;
}
}
if (csr->classifier_rule_en&PROTOCOLSRCPORTRANGE) {
i = ((port[0]<<8)&0xff00)+port[1];
if ((i < csr->srcport_lo) || (i > csr->srcport_hi))
return 1;
}
if (csr->classifier_rule_en&PROTOCOLDSTPORTRANGE) {
i = ((port[2]<<8)&0xff00)+port[3];
if ((i < csr->dstport_lo) || (i > csr->dstport_hi))
return 1;
}
return 0;
}
static u32 get_qos_index(struct nic *nic, u8 *iph, u8 *tcpudph)
{
u32 IP_Ver, Header_Len, i;
struct qos_cb_s *qcb = &nic->qos;
if (iph == NULL || tcpudph == NULL)
return -1;
IP_Ver = (iph[0]>>4)&0xf;
Header_Len = iph[0]&0xf;
if (IP_Ver == 4) {
for (i = 0; i < QOS_MAX; i++) {
if (qcb->csr[i].enabled) {
if (qcb->csr[i].classifier_rule_en) {
if (chk_ipv4_rule(&qcb->csr[i], iph,
tcpudph) == 0)
return i;
}
}
}
}
return -1;
}
static u32 extract_qos_list(struct nic *nic, struct list_head *head)
{
struct qos_cb_s *qcb = &nic->qos;
struct qos_entry_s *entry;
int i;
INIT_LIST_HEAD(head);
for (i = 0; i < QOS_MAX; i++) {
if (qcb->csr[i].enabled) {
if (qcb->csr[i].qos_buf_count < qcb->qos_limit_size) {
if (!list_empty(&qcb->qos_list[i])) {
entry = list_entry(
qcb->qos_list[i].prev,
struct qos_entry_s, list);
list_move_tail(&entry->list, head);
qcb->csr[i].qos_buf_count++;
if (!list_empty(&qcb->qos_list[i]))
netdev_warn(nic->netdev,
"Index(%d) is piled!!\n",
i);
}
}
}
}
return 0;
}
static void send_qos_list(struct nic *nic, struct list_head *head)
{
struct qos_entry_s *entry, *n;
list_for_each_entry_safe(entry, n, head, list) {
list_del(&entry->list);
free_qos_entry(entry);
gdm_wimax_send_tx(entry->skb, entry->dev);
}
}
int gdm_qos_send_hci_pkt(struct sk_buff *skb, struct net_device *dev)
{
struct nic *nic = netdev_priv(dev);
int index;
struct qos_cb_s *qcb = &nic->qos;
unsigned long flags;
struct ethhdr *ethh = (struct ethhdr *) (skb->data + HCI_HEADER_SIZE);
struct iphdr *iph = (struct iphdr *) ((char *) ethh + ETH_HLEN);
struct tcphdr *tcph;
struct qos_entry_s *entry = NULL;
struct list_head send_list;
int ret = 0;
tcph = (struct tcphdr *) iph + iph->ihl*4;
if (B2H(ethh->h_proto) == ETH_P_IP) {
if (qcb->qos_list_cnt && !qos_free_list.cnt) {
entry = alloc_qos_entry();
entry->skb = skb;
entry->dev = dev;
netdev_dbg(dev, "qcb->qos_list_cnt=%d\n",
qcb->qos_list_cnt);
}
spin_lock_irqsave(&qcb->qos_lock, flags);
if (qcb->qos_list_cnt) {
index = get_qos_index(nic, (u8 *)iph, (u8 *) tcph);
if (index == -1)
index = qcb->qos_null_idx;
if (!entry) {
entry = alloc_qos_entry();
entry->skb = skb;
entry->dev = dev;
}
list_add_tail(&entry->list, &qcb->qos_list[index]);
extract_qos_list(nic, &send_list);
spin_unlock_irqrestore(&qcb->qos_lock, flags);
send_qos_list(nic, &send_list);
goto out;
}
spin_unlock_irqrestore(&qcb->qos_lock, flags);
if (entry)
free_qos_entry(entry);
}
ret = gdm_wimax_send_tx(skb, dev);
out:
return ret;
}
static u32 get_csr(struct qos_cb_s *qcb, u32 SFID, int mode)
{
int i;
for (i = 0; i < qcb->qos_list_cnt; i++) {
if (qcb->csr[i].SFID == SFID)
return i;
}
if (mode) {
for (i = 0; i < QOS_MAX; i++) {
if (qcb->csr[i].enabled == 0) {
qcb->csr[i].enabled = 1;
qcb->qos_list_cnt++;
return i;
}
}
}
return -1;
}
#define QOS_CHANGE_DEL 0xFC
#define QOS_ADD 0xFD
#define QOS_REPORT 0xFE
void gdm_recv_qos_hci_packet(void *nic_ptr, u8 *buf, int size)
{
struct nic *nic = nic_ptr;
u32 i, SFID, index, pos;
u8 subCmdEvt;
struct qos_cb_s *qcb = &nic->qos;
struct qos_entry_s *entry, *n;
struct list_head send_list;
struct list_head free_list;
unsigned long flags;
subCmdEvt = (u8)buf[4];
if (subCmdEvt == QOS_REPORT) {
spin_lock_irqsave(&qcb->qos_lock, flags);
for (i = 0; i < qcb->qos_list_cnt; i++) {
SFID = ((buf[(i*5)+6]<<24)&0xff000000);
SFID += ((buf[(i*5)+7]<<16)&0xff0000);
SFID += ((buf[(i*5)+8]<<8)&0xff00);
SFID += (buf[(i*5)+9]);
index = get_csr(qcb, SFID, 0);
if (index == -1) {
spin_unlock_irqrestore(&qcb->qos_lock, flags);
netdev_err(nic->netdev, "QoS ERROR: No SF\n");
return;
}
qcb->csr[index].qos_buf_count = buf[(i*5)+10];
}
extract_qos_list(nic, &send_list);
spin_unlock_irqrestore(&qcb->qos_lock, flags);
send_qos_list(nic, &send_list);
return;
}
/* subCmdEvt == QOS_ADD || subCmdEvt == QOS_CHANG_DEL */
pos = 6;
SFID = ((buf[pos++]<<24)&0xff000000);
SFID += ((buf[pos++]<<16)&0xff0000);
SFID += ((buf[pos++]<<8)&0xff00);
SFID += (buf[pos++]);
index = get_csr(qcb, SFID, 1);
if (index == -1) {
netdev_err(nic->netdev,
"QoS ERROR: csr Update Error / Wrong index (%d) \n",
index);
return;
}
if (subCmdEvt == QOS_ADD) {
netdev_dbg(nic->netdev, "QOS_ADD SFID = 0x%x, index=%d\n",
SFID, index);
spin_lock_irqsave(&qcb->qos_lock, flags);
qcb->csr[index].SFID = SFID;
qcb->csr[index].classifier_rule_en = ((buf[pos++]<<8)&0xff00);
qcb->csr[index].classifier_rule_en += buf[pos++];
if (qcb->csr[index].classifier_rule_en == 0)
qcb->qos_null_idx = index;
qcb->csr[index].ip2s_mask = buf[pos++];
qcb->csr[index].ip2s_lo = buf[pos++];
qcb->csr[index].ip2s_hi = buf[pos++];
qcb->csr[index].protocol = buf[pos++];
qcb->csr[index].ipsrc_addrmask[0] = buf[pos++];
qcb->csr[index].ipsrc_addrmask[1] = buf[pos++];
qcb->csr[index].ipsrc_addrmask[2] = buf[pos++];
qcb->csr[index].ipsrc_addrmask[3] = buf[pos++];
qcb->csr[index].ipsrc_addr[0] = buf[pos++];
qcb->csr[index].ipsrc_addr[1] = buf[pos++];
qcb->csr[index].ipsrc_addr[2] = buf[pos++];
qcb->csr[index].ipsrc_addr[3] = buf[pos++];
qcb->csr[index].ipdst_addrmask[0] = buf[pos++];
qcb->csr[index].ipdst_addrmask[1] = buf[pos++];
qcb->csr[index].ipdst_addrmask[2] = buf[pos++];
qcb->csr[index].ipdst_addrmask[3] = buf[pos++];
qcb->csr[index].ipdst_addr[0] = buf[pos++];
qcb->csr[index].ipdst_addr[1] = buf[pos++];
qcb->csr[index].ipdst_addr[2] = buf[pos++];
qcb->csr[index].ipdst_addr[3] = buf[pos++];
qcb->csr[index].srcport_lo = ((buf[pos++]<<8)&0xff00);
qcb->csr[index].srcport_lo += buf[pos++];
qcb->csr[index].srcport_hi = ((buf[pos++]<<8)&0xff00);
qcb->csr[index].srcport_hi += buf[pos++];
qcb->csr[index].dstport_lo = ((buf[pos++]<<8)&0xff00);
qcb->csr[index].dstport_lo += buf[pos++];
qcb->csr[index].dstport_hi = ((buf[pos++]<<8)&0xff00);
qcb->csr[index].dstport_hi += buf[pos++];
qcb->qos_limit_size = 254/qcb->qos_list_cnt;
spin_unlock_irqrestore(&qcb->qos_lock, flags);
} else if (subCmdEvt == QOS_CHANGE_DEL) {
netdev_dbg(nic->netdev, "QOS_CHANGE_DEL SFID = 0x%x, index=%d\n",
SFID, index);
INIT_LIST_HEAD(&free_list);
spin_lock_irqsave(&qcb->qos_lock, flags);
qcb->csr[index].enabled = 0;
qcb->qos_list_cnt--;
qcb->qos_limit_size = 254/qcb->qos_list_cnt;
list_for_each_entry_safe(entry, n, &qcb->qos_list[index],
list) {
list_move_tail(&entry->list, &free_list);
}
spin_unlock_irqrestore(&qcb->qos_lock, flags);
free_qos_entry_list(&free_list);
}
}