diff options
Diffstat (limited to 'drivers/staging/gdm72xx/gdm_qos.c')
| -rw-r--r-- | drivers/staging/gdm72xx/gdm_qos.c | 438 |
1 files changed, 438 insertions, 0 deletions
diff --git a/drivers/staging/gdm72xx/gdm_qos.c b/drivers/staging/gdm72xx/gdm_qos.c new file mode 100644 index 000000000..96bf2bf87 --- /dev/null +++ b/drivers/staging/gdm72xx/gdm_qos.c @@ -0,0 +1,438 @@ +/* + * 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 = (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 = 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 == NULL || tcpudph == NULL) + 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); + } +} |