![Devendra Naga](/assets/img/avatar_default.png)
Signed-off-by: Devendra Naga <devendra.aaru@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
460 lines
11 KiB
C
460 lines
11 KiB
C
/*
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* Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/etherdevice.h>
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#include <asm/byteorder.h>
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#include <linux/ip.h>
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#include <linux/tcp.h>
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#include <linux/if_ether.h>
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#include "gdm_wimax.h"
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#include "hci.h"
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#include "gdm_qos.h"
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#define B2H(x) __be16_to_cpu(x)
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#undef dprintk
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#define dprintk(fmt, args ...) printk(KERN_DEBUG "[QoS] " fmt, ## args)
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#undef wprintk
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#define wprintk(fmt, args ...) \
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printk(KERN_WARNING "[QoS WARNING] " fmt, ## args)
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#undef eprintk
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#define eprintk(fmt, args ...) printk(KERN_ERR "[QoS ERROR] " fmt, ## args)
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#define MAX_FREE_LIST_CNT 32
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static struct {
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struct list_head head;
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int cnt;
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spinlock_t lock;
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} qos_free_list;
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static void init_qos_entry_list(void)
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{
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qos_free_list.cnt = 0;
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INIT_LIST_HEAD(&qos_free_list.head);
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spin_lock_init(&qos_free_list.lock);
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}
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static void *alloc_qos_entry(void)
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{
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struct qos_entry_s *entry;
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unsigned long flags;
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spin_lock_irqsave(&qos_free_list.lock, flags);
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if (qos_free_list.cnt) {
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entry = list_entry(qos_free_list.head.prev, struct qos_entry_s,
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list);
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list_del(&entry->list);
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qos_free_list.cnt--;
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spin_unlock_irqrestore(&qos_free_list.lock, flags);
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return entry;
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}
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spin_unlock_irqrestore(&qos_free_list.lock, flags);
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entry = kmalloc(sizeof(struct qos_entry_s), GFP_ATOMIC);
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return entry;
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}
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static void free_qos_entry(void *entry)
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{
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struct qos_entry_s *qentry = (struct qos_entry_s *) entry;
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unsigned long flags;
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spin_lock_irqsave(&qos_free_list.lock, flags);
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if (qos_free_list.cnt < MAX_FREE_LIST_CNT) {
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list_add(&qentry->list, &qos_free_list.head);
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qos_free_list.cnt++;
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spin_unlock_irqrestore(&qos_free_list.lock, flags);
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return;
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}
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spin_unlock_irqrestore(&qos_free_list.lock, flags);
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kfree(entry);
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}
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static void free_qos_entry_list(struct list_head *free_list)
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{
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struct qos_entry_s *entry, *n;
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int total_free = 0;
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list_for_each_entry_safe(entry, n, free_list, list) {
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list_del(&entry->list);
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kfree(entry);
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total_free++;
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}
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dprintk("%s: total_free_cnt=%d\n", __func__, total_free);
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}
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void gdm_qos_init(void *nic_ptr)
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{
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struct nic *nic = nic_ptr;
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struct qos_cb_s *qcb = &nic->qos;
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int i;
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for (i = 0 ; i < QOS_MAX; i++) {
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INIT_LIST_HEAD(&qcb->qos_list[i]);
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qcb->csr[i].QoSBufCount = 0;
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qcb->csr[i].Enabled = 0;
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}
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qcb->qos_list_cnt = 0;
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qcb->qos_null_idx = QOS_MAX-1;
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qcb->qos_limit_size = 255;
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spin_lock_init(&qcb->qos_lock);
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init_qos_entry_list();
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}
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void gdm_qos_release_list(void *nic_ptr)
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{
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struct nic *nic = nic_ptr;
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struct qos_cb_s *qcb = &nic->qos;
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unsigned long flags;
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struct qos_entry_s *entry, *n;
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struct list_head free_list;
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int i;
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INIT_LIST_HEAD(&free_list);
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spin_lock_irqsave(&qcb->qos_lock, flags);
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for (i = 0; i < QOS_MAX; i++) {
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qcb->csr[i].QoSBufCount = 0;
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qcb->csr[i].Enabled = 0;
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}
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qcb->qos_list_cnt = 0;
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qcb->qos_null_idx = QOS_MAX-1;
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for (i = 0; i < QOS_MAX; i++) {
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list_for_each_entry_safe(entry, n, &qcb->qos_list[i], list) {
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list_move_tail(&entry->list, &free_list);
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}
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}
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spin_unlock_irqrestore(&qcb->qos_lock, flags);
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free_qos_entry_list(&free_list);
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}
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static u32 chk_ipv4_rule(struct gdm_wimax_csr_s *csr, u8 *Stream, u8 *port)
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{
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int i;
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if (csr->ClassifierRuleEnable&IPTYPEOFSERVICE) {
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if (((Stream[1] & csr->IPToSMask) < csr->IPToSLow) ||
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((Stream[1] & csr->IPToSMask) > csr->IPToSHigh))
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return 1;
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}
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if (csr->ClassifierRuleEnable&PROTOCOL) {
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if (Stream[9] != csr->Protocol)
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return 1;
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}
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if (csr->ClassifierRuleEnable&IPMASKEDSRCADDRESS) {
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for (i = 0; i < 4; i++) {
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if ((Stream[12 + i] & csr->IPSrcAddrMask[i]) !=
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(csr->IPSrcAddr[i] & csr->IPSrcAddrMask[i]))
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return 1;
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}
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}
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if (csr->ClassifierRuleEnable&IPMASKEDDSTADDRESS) {
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for (i = 0; i < 4; i++) {
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if ((Stream[16 + i] & csr->IPDstAddrMask[i]) !=
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(csr->IPDstAddr[i] & csr->IPDstAddrMask[i]))
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return 1;
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}
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}
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if (csr->ClassifierRuleEnable&PROTOCOLSRCPORTRANGE) {
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i = ((port[0]<<8)&0xff00)+port[1];
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if ((i < csr->SrcPortLow) || (i > csr->SrcPortHigh))
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return 1;
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}
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if (csr->ClassifierRuleEnable&PROTOCOLDSTPORTRANGE) {
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i = ((port[2]<<8)&0xff00)+port[3];
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if ((i < csr->DstPortLow) || (i > csr->DstPortHigh))
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return 1;
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}
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return 0;
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}
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static u32 get_qos_index(struct nic *nic, u8* iph, u8* tcpudph)
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{
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u32 IP_Ver, Header_Len, i;
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struct qos_cb_s *qcb = &nic->qos;
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if (iph == NULL || tcpudph == NULL)
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return -1;
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IP_Ver = (iph[0]>>4)&0xf;
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Header_Len = iph[0]&0xf;
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if (IP_Ver == 4) {
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for (i = 0; i < QOS_MAX; i++) {
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if (qcb->csr[i].Enabled) {
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if (qcb->csr[i].ClassifierRuleEnable) {
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if (chk_ipv4_rule(&qcb->csr[i], iph,
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tcpudph) == 0)
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return i;
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}
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}
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}
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}
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return -1;
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}
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static u32 extract_qos_list(struct nic *nic, struct list_head *head)
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{
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struct qos_cb_s *qcb = &nic->qos;
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struct qos_entry_s *entry;
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int i;
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INIT_LIST_HEAD(head);
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for (i = 0; i < QOS_MAX; i++) {
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if (qcb->csr[i].Enabled) {
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if (qcb->csr[i].QoSBufCount < qcb->qos_limit_size) {
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if (!list_empty(&qcb->qos_list[i])) {
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entry = list_entry(
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qcb->qos_list[i].prev,
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struct qos_entry_s, list);
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list_move_tail(&entry->list, head);
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qcb->csr[i].QoSBufCount++;
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if (!list_empty(&qcb->qos_list[i]))
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wprintk("QoS Index(%d) "
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"is piled!!\n", i);
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}
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}
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}
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}
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return 0;
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}
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static void send_qos_list(struct nic *nic, struct list_head *head)
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{
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struct qos_entry_s *entry, *n;
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list_for_each_entry_safe(entry, n, head, list) {
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list_del(&entry->list);
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free_qos_entry(entry);
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gdm_wimax_send_tx(entry->skb, entry->dev);
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}
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}
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int gdm_qos_send_hci_pkt(struct sk_buff *skb, struct net_device *dev)
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{
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struct nic *nic = netdev_priv(dev);
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int index;
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struct qos_cb_s *qcb = &nic->qos;
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unsigned long flags;
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struct ethhdr *ethh = (struct ethhdr *) (skb->data + HCI_HEADER_SIZE);
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struct iphdr *iph = (struct iphdr *) ((char *) ethh + ETH_HLEN);
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struct tcphdr *tcph;
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struct qos_entry_s *entry = NULL;
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struct list_head send_list;
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int ret = 0;
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tcph = (struct tcphdr *) iph + iph->ihl*4;
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if (B2H(ethh->h_proto) == ETH_P_IP) {
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if (qcb->qos_list_cnt && !qos_free_list.cnt) {
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entry = alloc_qos_entry();
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entry->skb = skb;
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entry->dev = dev;
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dprintk("qcb->qos_list_cnt=%d\n", qcb->qos_list_cnt);
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}
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spin_lock_irqsave(&qcb->qos_lock, flags);
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if (qcb->qos_list_cnt) {
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index = get_qos_index(nic, (u8 *)iph, (u8 *) tcph);
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if (index == -1)
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index = qcb->qos_null_idx;
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if (!entry) {
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entry = alloc_qos_entry();
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entry->skb = skb;
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entry->dev = dev;
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}
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list_add_tail(&entry->list, &qcb->qos_list[index]);
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extract_qos_list(nic, &send_list);
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spin_unlock_irqrestore(&qcb->qos_lock, flags);
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send_qos_list(nic, &send_list);
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goto out;
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}
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spin_unlock_irqrestore(&qcb->qos_lock, flags);
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if (entry)
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free_qos_entry(entry);
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}
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ret = gdm_wimax_send_tx(skb, dev);
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out:
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return ret;
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}
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static u32 get_csr(struct qos_cb_s *qcb, u32 SFID, int mode)
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{
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int i;
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for (i = 0; i < qcb->qos_list_cnt; i++) {
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if (qcb->csr[i].SFID == SFID)
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return i;
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}
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if (mode) {
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for (i = 0; i < QOS_MAX; i++) {
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if (qcb->csr[i].Enabled == 0) {
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qcb->csr[i].Enabled = 1;
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qcb->qos_list_cnt++;
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return i;
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}
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}
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}
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return -1;
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}
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#define QOS_CHANGE_DEL 0xFC
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#define QOS_ADD 0xFD
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#define QOS_REPORT 0xFE
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void gdm_recv_qos_hci_packet(void *nic_ptr, u8 *buf, int size)
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{
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struct nic *nic = nic_ptr;
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u32 i, SFID, index, pos;
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u8 subCmdEvt;
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u8 len;
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struct qos_cb_s *qcb = &nic->qos;
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struct qos_entry_s *entry, *n;
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struct list_head send_list;
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struct list_head free_list;
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unsigned long flags;
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subCmdEvt = (u8)buf[4];
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if (subCmdEvt == QOS_REPORT) {
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len = (u8)buf[5];
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spin_lock_irqsave(&qcb->qos_lock, flags);
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for (i = 0; i < qcb->qos_list_cnt; i++) {
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SFID = ((buf[(i*5)+6]<<24)&0xff000000);
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SFID += ((buf[(i*5)+7]<<16)&0xff0000);
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SFID += ((buf[(i*5)+8]<<8)&0xff00);
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SFID += (buf[(i*5)+9]);
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index = get_csr(qcb, SFID, 0);
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if (index == -1) {
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spin_unlock_irqrestore(&qcb->qos_lock, flags);
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eprintk("QoS ERROR: No SF\n");
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return;
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}
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qcb->csr[index].QoSBufCount = buf[(i*5)+10];
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}
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extract_qos_list(nic, &send_list);
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spin_unlock_irqrestore(&qcb->qos_lock, flags);
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send_qos_list(nic, &send_list);
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return;
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} else if (subCmdEvt == QOS_ADD) {
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pos = 5;
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len = (u8)buf[pos++];
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SFID = ((buf[pos++]<<24)&0xff000000);
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SFID += ((buf[pos++]<<16)&0xff0000);
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SFID += ((buf[pos++]<<8)&0xff00);
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SFID += (buf[pos++]);
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index = get_csr(qcb, SFID, 1);
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if (index == -1) {
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eprintk("QoS ERROR: csr Update Error\n");
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return;
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}
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dprintk("QOS_ADD SFID = 0x%x, index=%d\n", SFID, index);
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spin_lock_irqsave(&qcb->qos_lock, flags);
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qcb->csr[index].SFID = SFID;
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qcb->csr[index].ClassifierRuleEnable = ((buf[pos++]<<8)&0xff00);
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qcb->csr[index].ClassifierRuleEnable += buf[pos++];
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if (qcb->csr[index].ClassifierRuleEnable == 0)
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qcb->qos_null_idx = index;
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qcb->csr[index].IPToSMask = buf[pos++];
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qcb->csr[index].IPToSLow = buf[pos++];
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qcb->csr[index].IPToSHigh = buf[pos++];
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qcb->csr[index].Protocol = buf[pos++];
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qcb->csr[index].IPSrcAddrMask[0] = buf[pos++];
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qcb->csr[index].IPSrcAddrMask[1] = buf[pos++];
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qcb->csr[index].IPSrcAddrMask[2] = buf[pos++];
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qcb->csr[index].IPSrcAddrMask[3] = buf[pos++];
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qcb->csr[index].IPSrcAddr[0] = buf[pos++];
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qcb->csr[index].IPSrcAddr[1] = buf[pos++];
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qcb->csr[index].IPSrcAddr[2] = buf[pos++];
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qcb->csr[index].IPSrcAddr[3] = buf[pos++];
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qcb->csr[index].IPDstAddrMask[0] = buf[pos++];
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qcb->csr[index].IPDstAddrMask[1] = buf[pos++];
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qcb->csr[index].IPDstAddrMask[2] = buf[pos++];
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qcb->csr[index].IPDstAddrMask[3] = buf[pos++];
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qcb->csr[index].IPDstAddr[0] = buf[pos++];
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qcb->csr[index].IPDstAddr[1] = buf[pos++];
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qcb->csr[index].IPDstAddr[2] = buf[pos++];
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qcb->csr[index].IPDstAddr[3] = buf[pos++];
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qcb->csr[index].SrcPortLow = ((buf[pos++]<<8)&0xff00);
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qcb->csr[index].SrcPortLow += buf[pos++];
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qcb->csr[index].SrcPortHigh = ((buf[pos++]<<8)&0xff00);
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qcb->csr[index].SrcPortHigh += buf[pos++];
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qcb->csr[index].DstPortLow = ((buf[pos++]<<8)&0xff00);
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qcb->csr[index].DstPortLow += buf[pos++];
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qcb->csr[index].DstPortHigh = ((buf[pos++]<<8)&0xff00);
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qcb->csr[index].DstPortHigh += buf[pos++];
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qcb->qos_limit_size = 254/qcb->qos_list_cnt;
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spin_unlock_irqrestore(&qcb->qos_lock, flags);
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} else if (subCmdEvt == QOS_CHANGE_DEL) {
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pos = 5;
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len = (u8)buf[pos++];
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SFID = ((buf[pos++]<<24)&0xff000000);
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SFID += ((buf[pos++]<<16)&0xff0000);
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SFID += ((buf[pos++]<<8)&0xff00);
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SFID += (buf[pos++]);
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index = get_csr(qcb, SFID, 1);
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if (index == -1) {
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eprintk("QoS ERROR: Wrong index(%d)\n", index);
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return;
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}
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dprintk("QOS_CHANGE_DEL SFID = 0x%x, index=%d\n", SFID, index);
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INIT_LIST_HEAD(&free_list);
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spin_lock_irqsave(&qcb->qos_lock, flags);
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qcb->csr[index].Enabled = 0;
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qcb->qos_list_cnt--;
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qcb->qos_limit_size = 254/qcb->qos_list_cnt;
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list_for_each_entry_safe(entry, n, &qcb->qos_list[index],
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list) {
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list_move_tail(&entry->list, &free_list);
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}
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spin_unlock_irqrestore(&qcb->qos_lock, flags);
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free_qos_entry_list(&free_list);
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}
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}
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