Pileus Git - ~andy/linux/blob - drivers/staging/gdm72xx/gdm_qos.c

   1 /*
   2  * Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved.
   3  *
   4  * This software is licensed under the terms of the GNU General Public
   5  * License version 2, as published by the Free Software Foundation, and
   6  * may be copied, distributed, and modified under those terms.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  11  * GNU General Public License for more details.
  12  */
  13
  14 #include <linux/etherdevice.h>
  15 #include <asm/byteorder.h>
  16
  17 #include <linux/ip.h>
  18 #include <linux/tcp.h>
  19 #include <linux/if_ether.h>
  20
  21 #include "gdm_wimax.h"
  22 #include "hci.h"
  23 #include "gdm_qos.h"
  24
  25 #define B2H(x)          __be16_to_cpu(x)
  26
  27 #undef dprintk
  28 #define dprintk(fmt, args ...) printk(KERN_DEBUG "[QoS] " fmt, ## args)
  29 #undef wprintk
  30 #define wprintk(fmt, args ...) \
  31         printk(KERN_WARNING "[QoS WARNING] " fmt, ## args)
  32 #undef eprintk
  33 #define eprintk(fmt, args ...) printk(KERN_ERR "[QoS ERROR] " fmt, ## args)
  34
  35
  36 #define MAX_FREE_LIST_CNT               32
  37 static struct {
  38         struct list_head head;
  39         int cnt;
  40         spinlock_t lock;
  41 } qos_free_list;
  42
  43 static void init_qos_entry_list(void)
  44 {
  45         qos_free_list.cnt = 0;
  46         INIT_LIST_HEAD(&qos_free_list.head);
  47         spin_lock_init(&qos_free_list.lock);
  48 }
  49
  50 static void *alloc_qos_entry(void)
  51 {
  52         struct qos_entry_s *entry;
  53         unsigned long flags;
  54
  55         spin_lock_irqsave(&qos_free_list.lock, flags);
  56         if (qos_free_list.cnt) {
  57                 entry = list_entry(qos_free_list.head.prev, struct qos_entry_s,
  58                                         list);
  59                 list_del(&entry->list);
  60                 qos_free_list.cnt--;
  61                 spin_unlock_irqrestore(&qos_free_list.lock, flags);
  62                 return entry;
  63         }
  64         spin_unlock_irqrestore(&qos_free_list.lock, flags);
  65
  66         entry = kmalloc(sizeof(struct qos_entry_s), GFP_ATOMIC);
  67         return entry;
  68 }
  69
  70 static void free_qos_entry(void *entry)
  71 {
  72         struct qos_entry_s *qentry = (struct qos_entry_s *) entry;
  73         unsigned long flags;
  74
  75         spin_lock_irqsave(&qos_free_list.lock, flags);
  76         if (qos_free_list.cnt < MAX_FREE_LIST_CNT) {
  77                 list_add(&qentry->list, &qos_free_list.head);
  78                 qos_free_list.cnt++;
  79                 spin_unlock_irqrestore(&qos_free_list.lock, flags);
  80                 return;
  81         }
  82         spin_unlock_irqrestore(&qos_free_list.lock, flags);
  83
  84         kfree(entry);
  85 }
  86
  87 static void free_qos_entry_list(struct list_head *free_list)
  88 {
  89         struct qos_entry_s *entry, *n;
  90         int total_free = 0;
  91
  92         list_for_each_entry_safe(entry, n, free_list, list) {
  93                 list_del(&entry->list);
  94                 kfree(entry);
  95                 total_free++;
  96         }
  97
  98         dprintk("%s: total_free_cnt=%d\n", __func__, total_free);
  99 }
 100
 101 void gdm_qos_init(void *nic_ptr)
 102 {
 103         struct nic *nic = nic_ptr;
 104         struct qos_cb_s *qcb = &nic->qos;
 105         int i;
 106
 107         for (i = 0 ; i < QOS_MAX; i++) {
 108                 INIT_LIST_HEAD(&qcb->qos_list[i]);
 109                 qcb->csr[i].QoSBufCount = 0;
 110                 qcb->csr[i].Enabled = 0;
 111         }
 112
 113         qcb->qos_list_cnt = 0;
 114         qcb->qos_null_idx = QOS_MAX-1;
 115         qcb->qos_limit_size = 255;
 116
 117         spin_lock_init(&qcb->qos_lock);
 118
 119         init_qos_entry_list();
 120 }
 121
 122 void gdm_qos_release_list(void *nic_ptr)
 123 {
 124         struct nic *nic = nic_ptr;
 125         struct qos_cb_s *qcb = &nic->qos;
 126         unsigned long flags;
 127         struct qos_entry_s *entry, *n;
 128         struct list_head free_list;
 129         int i;
 130
 131         INIT_LIST_HEAD(&free_list);
 132
 133         spin_lock_irqsave(&qcb->qos_lock, flags);
 134
 135         for (i = 0; i < QOS_MAX; i++) {
 136                 qcb->csr[i].QoSBufCount = 0;
 137                 qcb->csr[i].Enabled = 0;
 138         }
 139
 140         qcb->qos_list_cnt = 0;
 141         qcb->qos_null_idx = QOS_MAX-1;
 142
 143         for (i = 0; i < QOS_MAX; i++) {
 144                 list_for_each_entry_safe(entry, n, &qcb->qos_list[i], list) {
 145                         list_move_tail(&entry->list, &free_list);
 146                 }
 147         }
 148         spin_unlock_irqrestore(&qcb->qos_lock, flags);
 149         free_qos_entry_list(&free_list);
 150 }
 151
 152 static u32 chk_ipv4_rule(struct gdm_wimax_csr_s *csr, u8 *Stream, u8 *port)
 153 {
 154         int i;
 155
 156         if (csr->ClassifierRuleEnable&IPTYPEOFSERVICE) {
 157                 if (((Stream[1] & csr->IPToSMask) < csr->IPToSLow) ||
 158                 ((Stream[1] & csr->IPToSMask) > csr->IPToSHigh))
 159                         return 1;
 160         }
 161
 162         if (csr->ClassifierRuleEnable&PROTOCOL) {
 163                 if (Stream[9] != csr->Protocol)
 164                         return 1;
 165         }
 166
 167         if (csr->ClassifierRuleEnable&IPMASKEDSRCADDRESS) {
 168                 for (i = 0; i < 4; i++) {
 169                         if ((Stream[12 + i] & csr->IPSrcAddrMask[i]) !=
 170                         (csr->IPSrcAddr[i] & csr->IPSrcAddrMask[i]))
 171                                 return 1;
 172                 }
 173         }
 174
 175         if (csr->ClassifierRuleEnable&IPMASKEDDSTADDRESS) {
 176                 for (i = 0; i < 4; i++) {
 177                         if ((Stream[16 + i] & csr->IPDstAddrMask[i]) !=
 178                         (csr->IPDstAddr[i] & csr->IPDstAddrMask[i]))
 179                                 return 1;
 180                 }
 181         }
 182
 183         if (csr->ClassifierRuleEnable&PROTOCOLSRCPORTRANGE) {
 184                 i = ((port[0]<<8)&0xff00)+port[1];
 185                 if ((i < csr->SrcPortLow) || (i > csr->SrcPortHigh))
 186                         return 1;
 187         }
 188
 189         if (csr->ClassifierRuleEnable&PROTOCOLDSTPORTRANGE) {
 190                 i = ((port[2]<<8)&0xff00)+port[3];
 191                 if ((i < csr->DstPortLow) || (i > csr->DstPortHigh))
 192                         return 1;
 193         }
 194
 195         return 0;
 196 }
 197
 198 static u32 get_qos_index(struct nic *nic, u8* iph, u8* tcpudph)
 199 {
 200         u32     IP_Ver, Header_Len, i;
 201         struct qos_cb_s *qcb = &nic->qos;
 202
 203         if (iph == NULL || tcpudph == NULL)
 204                 return -1;
 205
 206         IP_Ver = (iph[0]>>4)&0xf;
 207         Header_Len = iph[0]&0xf;
 208
 209         if (IP_Ver == 4) {
 210                 for (i = 0; i < QOS_MAX; i++) {
 211                         if (qcb->csr[i].Enabled) {
 212                                 if (qcb->csr[i].ClassifierRuleEnable) {
 213                                         if (chk_ipv4_rule(&qcb->csr[i], iph,
 214                                         tcpudph) == 0)
 215                                                 return i;
 216                                 }
 217                         }
 218                 }
 219         }
 220
 221         return -1;
 222 }
 223
 224 static u32 extract_qos_list(struct nic *nic, struct list_head *head)
 225 {
 226         struct qos_cb_s *qcb = &nic->qos;
 227         struct qos_entry_s *entry;
 228         int i;
 229
 230         INIT_LIST_HEAD(head);
 231
 232         for (i = 0; i < QOS_MAX; i++) {
 233                 if (qcb->csr[i].Enabled) {
 234                         if (qcb->csr[i].QoSBufCount < qcb->qos_limit_size) {
 235                                 if (!list_empty(&qcb->qos_list[i])) {
 236                                         entry = list_entry(
 237                                         qcb->qos_list[i].prev,
 238                                         struct qos_entry_s, list);
 239                                         list_move_tail(&entry->list, head);
 240                                         qcb->csr[i].QoSBufCount++;
 241
 242                                         if (!list_empty(&qcb->qos_list[i]))
 243                                                 wprintk("QoS Index(%d) "
 244                                                         "is piled!!\n", i);
 245                                 }
 246                         }
 247                 }
 248         }
 249
 250         return 0;
 251 }
 252
 253 static void send_qos_list(struct nic *nic, struct list_head *head)
 254 {
 255         struct qos_entry_s *entry, *n;
 256
 257         list_for_each_entry_safe(entry, n, head, list) {
 258                 list_del(&entry->list);
 259                 free_qos_entry(entry);
 260                 gdm_wimax_send_tx(entry->skb, entry->dev);
 261         }
 262 }
 263
 264 int gdm_qos_send_hci_pkt(struct sk_buff *skb, struct net_device *dev)
 265 {
 266         struct nic *nic = netdev_priv(dev);
 267         int index;
 268         struct qos_cb_s *qcb = &nic->qos;
 269         unsigned long flags;
 270         struct ethhdr *ethh = (struct ethhdr *) (skb->data + HCI_HEADER_SIZE);
 271         struct iphdr *iph = (struct iphdr *) ((char *) ethh + ETH_HLEN);
 272         struct tcphdr *tcph;
 273         struct qos_entry_s *entry = NULL;
 274         struct list_head send_list;
 275         int ret = 0;
 276
 277         tcph = (struct tcphdr *) iph + iph->ihl*4;
 278
 279         if (B2H(ethh->h_proto) == ETH_P_IP) {
 280                 if (qcb->qos_list_cnt && !qos_free_list.cnt) {
 281                         entry = alloc_qos_entry();
 282                         entry->skb = skb;
 283                         entry->dev = dev;
 284                         dprintk("qcb->qos_list_cnt=%d\n", qcb->qos_list_cnt);
 285                 }
 286
 287                 spin_lock_irqsave(&qcb->qos_lock, flags);
 288                 if (qcb->qos_list_cnt) {
 289                         index = get_qos_index(nic, (u8 *)iph, (u8 *) tcph);
 290                         if (index == -1)
 291                                 index = qcb->qos_null_idx;
 292
 293                         if (!entry) {
 294                                 entry = alloc_qos_entry();
 295                                 entry->skb = skb;
 296                                 entry->dev = dev;
 297                         }
 298
 299                         list_add_tail(&entry->list, &qcb->qos_list[index]);
 300                         extract_qos_list(nic, &send_list);
 301                         spin_unlock_irqrestore(&qcb->qos_lock, flags);
 302                         send_qos_list(nic, &send_list);
 303                         goto out;
 304                 }
 305                 spin_unlock_irqrestore(&qcb->qos_lock, flags);
 306                 if (entry)
 307                         free_qos_entry(entry);
 308         }
 309
 310         ret = gdm_wimax_send_tx(skb, dev);
 311 out:
 312         return ret;
 313 }
 314
 315 static u32 get_csr(struct qos_cb_s *qcb, u32 SFID, int mode)
 316 {
 317         int i;
 318
 319         for (i = 0; i < qcb->qos_list_cnt; i++) {
 320                 if (qcb->csr[i].SFID == SFID)
 321                         return i;
 322         }
 323
 324         if (mode) {
 325                 for (i = 0; i < QOS_MAX; i++) {
 326                         if (qcb->csr[i].Enabled == 0) {
 327                                 qcb->csr[i].Enabled = 1;
 328                                 qcb->qos_list_cnt++;
 329                                 return i;
 330                         }
 331                 }
 332         }
 333         return -1;
 334 }
 335
 336 #define QOS_CHANGE_DEL  0xFC
 337 #define QOS_ADD         0xFD
 338 #define QOS_REPORT      0xFE
 339
 340 void gdm_recv_qos_hci_packet(void *nic_ptr, u8 *buf, int size)
 341 {
 342         struct nic *nic = nic_ptr;
 343         u32 i, SFID, index, pos;
 344         u8 subCmdEvt;
 345         u8 len;
 346         struct qos_cb_s *qcb = &nic->qos;
 347         struct qos_entry_s *entry, *n;
 348         struct list_head send_list;
 349         struct list_head free_list;
 350         unsigned long flags;
 351
 352         subCmdEvt = (u8)buf[4];
 353
 354         if (subCmdEvt == QOS_REPORT) {
 355                 len = (u8)buf[5];
 356
 357                 spin_lock_irqsave(&qcb->qos_lock, flags);
 358                 for (i = 0; i < qcb->qos_list_cnt; i++) {
 359                         SFID = ((buf[(i*5)+6]<<24)&0xff000000);
 360                         SFID += ((buf[(i*5)+7]<<16)&0xff0000);
 361                         SFID += ((buf[(i*5)+8]<<8)&0xff00);
 362                         SFID += (buf[(i*5)+9]);
 363                         index = get_csr(qcb, SFID, 0);
 364                         if (index == -1) {
 365                                 spin_unlock_irqrestore(&qcb->qos_lock, flags);
 366                                 eprintk("QoS ERROR: No SF\n");
 367                                 return;
 368                         }
 369                         qcb->csr[index].QoSBufCount = buf[(i*5)+10];
 370                 }
 371
 372                 extract_qos_list(nic, &send_list);
 373                 spin_unlock_irqrestore(&qcb->qos_lock, flags);
 374                 send_qos_list(nic, &send_list);
 375                 return;
 376         } else if (subCmdEvt == QOS_ADD) {
 377                 pos = 5;
 378                 len = (u8)buf[pos++];
 379
 380                 SFID = ((buf[pos++]<<24)&0xff000000);
 381                 SFID += ((buf[pos++]<<16)&0xff0000);
 382                 SFID += ((buf[pos++]<<8)&0xff00);
 383                 SFID += (buf[pos++]);
 384
 385                 index = get_csr(qcb, SFID, 1);
 386                 if (index == -1) {
 387                         eprintk("QoS ERROR: csr Update Error\n");
 388                         return;
 389                 }
 390
 391                 dprintk("QOS_ADD SFID = 0x%x, index=%d\n", SFID, index);
 392
 393                 spin_lock_irqsave(&qcb->qos_lock, flags);
 394                 qcb->csr[index].SFID = SFID;
 395                 qcb->csr[index].ClassifierRuleEnable = ((buf[pos++]<<8)&0xff00);
 396                 qcb->csr[index].ClassifierRuleEnable += buf[pos++];
 397                 if (qcb->csr[index].ClassifierRuleEnable == 0)
 398                         qcb->qos_null_idx = index;
 399                 qcb->csr[index].IPToSMask = buf[pos++];
 400                 qcb->csr[index].IPToSLow = buf[pos++];
 401                 qcb->csr[index].IPToSHigh = buf[pos++];
 402                 qcb->csr[index].Protocol = buf[pos++];
 403                 qcb->csr[index].IPSrcAddrMask[0] = buf[pos++];
 404                 qcb->csr[index].IPSrcAddrMask[1] = buf[pos++];
 405                 qcb->csr[index].IPSrcAddrMask[2] = buf[pos++];
 406                 qcb->csr[index].IPSrcAddrMask[3] = buf[pos++];
 407                 qcb->csr[index].IPSrcAddr[0] = buf[pos++];
 408                 qcb->csr[index].IPSrcAddr[1] = buf[pos++];
 409                 qcb->csr[index].IPSrcAddr[2] = buf[pos++];
 410                 qcb->csr[index].IPSrcAddr[3] = buf[pos++];
 411                 qcb->csr[index].IPDstAddrMask[0] = buf[pos++];
 412                 qcb->csr[index].IPDstAddrMask[1] = buf[pos++];
 413                 qcb->csr[index].IPDstAddrMask[2] = buf[pos++];
 414                 qcb->csr[index].IPDstAddrMask[3] = buf[pos++];
 415                 qcb->csr[index].IPDstAddr[0] = buf[pos++];
 416                 qcb->csr[index].IPDstAddr[1] = buf[pos++];
 417                 qcb->csr[index].IPDstAddr[2] = buf[pos++];
 418                 qcb->csr[index].IPDstAddr[3] = buf[pos++];
 419                 qcb->csr[index].SrcPortLow = ((buf[pos++]<<8)&0xff00);
 420                 qcb->csr[index].SrcPortLow += buf[pos++];
 421                 qcb->csr[index].SrcPortHigh = ((buf[pos++]<<8)&0xff00);
 422                 qcb->csr[index].SrcPortHigh += buf[pos++];
 423                 qcb->csr[index].DstPortLow = ((buf[pos++]<<8)&0xff00);
 424                 qcb->csr[index].DstPortLow += buf[pos++];
 425                 qcb->csr[index].DstPortHigh = ((buf[pos++]<<8)&0xff00);
 426                 qcb->csr[index].DstPortHigh += buf[pos++];
 427
 428                 qcb->qos_limit_size = 254/qcb->qos_list_cnt;
 429                 spin_unlock_irqrestore(&qcb->qos_lock, flags);
 430         } else if (subCmdEvt == QOS_CHANGE_DEL) {
 431                 pos = 5;
 432                 len = (u8)buf[pos++];
 433                 SFID = ((buf[pos++]<<24)&0xff000000);
 434                 SFID += ((buf[pos++]<<16)&0xff0000);
 435                 SFID += ((buf[pos++]<<8)&0xff00);
 436                 SFID += (buf[pos++]);
 437                 index = get_csr(qcb, SFID, 1);
 438                 if (index == -1) {
 439                         eprintk("QoS ERROR: Wrong index(%d)\n", index);
 440                         return;
 441                 }
 442
 443                 dprintk("QOS_CHANGE_DEL SFID = 0x%x, index=%d\n", SFID, index);
 444
 445                 INIT_LIST_HEAD(&free_list);
 446
 447                 spin_lock_irqsave(&qcb->qos_lock, flags);
 448                 qcb->csr[index].Enabled = 0;
 449                 qcb->qos_list_cnt--;
 450                 qcb->qos_limit_size = 254/qcb->qos_list_cnt;
 451
 452                 list_for_each_entry_safe(entry, n, &qcb->qos_list[index],
 453                                         list) {
 454                         list_move_tail(&entry->list, &free_list);
 455                 }
 456                 spin_unlock_irqrestore(&qcb->qos_lock, flags);
 457                 free_qos_entry_list(&free_list);
 458         }
 459 }