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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 <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 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);
- return kmalloc(sizeof(*entry), GFP_ATOMIC);
- }
- static void free_qos_entry(void *entry)
- {
- struct qos_entry_s *qentry = 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 = false;
- }
- 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 = false;
- }
- 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 int 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 int get_qos_index(struct nic *nic, u8 *iph, u8 *tcpudph)
- {
- int ip_ver, i;
- struct qos_cb_s *qcb = &nic->qos;
- if (!iph || !tcpudph)
- return -1;
- ip_ver = (iph[0]>>4)&0xf;
- if (ip_ver != 4)
- return -1;
- for (i = 0; i < QOS_MAX; i++) {
- if (!qcb->csr[i].enabled)
- continue;
- if (!qcb->csr[i].classifier_rule_en)
- continue;
- if (chk_ipv4_rule(&qcb->csr[i], iph, tcpudph) == 0)
- return i;
- }
- return -1;
- }
- static void 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)
- continue;
- if (qcb->csr[i].qos_buf_count >= qcb->qos_limit_size)
- continue;
- if (list_empty(&qcb->qos_list[i]))
- continue;
- 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);
- }
- }
- 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);
- gdm_wimax_send_tx(entry->skb, entry->dev);
- free_qos_entry(entry);
- }
- }
- 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 (ethh->h_proto == cpu_to_be16(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 int 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) {
- qcb->csr[i].enabled = true;
- 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;
- int i, index, pos;
- u32 sfid;
- u8 sub_cmd_evt;
- 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;
- sub_cmd_evt = (u8)buf[4];
- if (sub_cmd_evt == 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;
- }
- /* sub_cmd_evt == QOS_ADD || sub_cmd_evt == 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 (sub_cmd_evt == 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 (sub_cmd_evt == 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 = false;
- 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);
- }
- }
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