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/version.h>
  15 #include <linux/etherdevice.h>
  16 #include <asm/byteorder.h>
  17
  18 #include <linux/ip.h>
  19 #include <linux/tcp.h>
  20 #include <linux/if_ether.h>
  21
  22 #include "gdm_wimax.h"
  23 #include "hci.h"
  24 #include "gdm_qos.h"
  25
  26 #define B2H(x)          __be16_to_cpu(x)
  27
  28 #undef dprintk
  29 #define dprintk(fmt, args ...) printk(KERN_DEBUG "[QoS] " fmt, ## args)
  30 #undef wprintk
  31 #define wprintk(fmt, args ...) \
  32         printk(KERN_WARNING "[QoS WARNING] " fmt, ## args)
  33 #undef eprintk
  34 #define eprintk(fmt, args ...) printk(KERN_ERR "[QoS ERROR] " fmt, ## args)
  35
  36
  37 #define MAX_FREE_LIST_CNT               32
  38 static struct {
  39         struct list_head head;
  40         int cnt;
  41         spinlock_t lock;
  42 } qos_free_list;
  43
  44 static void init_qos_entry_list(void)
  45 {
  46         qos_free_list.cnt = 0;
  47         INIT_LIST_HEAD(&qos_free_list.head);
  48         spin_lock_init(&qos_free_list.lock);
  49 }
  50
  51 static void *alloc_qos_entry(void)
  52 {
  53         struct qos_entry_s *entry;
  54         unsigned long flags;
  55
  56         spin_lock_irqsave(&qos_free_list.lock, flags);
  57         if (qos_free_list.cnt) {
  58                 entry = list_entry(qos_free_list.head.prev, struct qos_entry_s,
  59                                         list);
  60                 list_del(&entry->list);
  61                 qos_free_list.cnt--;
  62                 spin_unlock_irqrestore(&qos_free_list.lock, flags);
  63                 return entry;
  64         }
  65         spin_unlock_irqrestore(&qos_free_list.lock, flags);
  66
  67         entry = kmalloc(sizeof(struct qos_entry_s), GFP_ATOMIC);
  68         return entry;
  69 }
  70
  71 static void free_qos_entry(void *entry)
  72 {
  73         struct qos_entry_s *qentry = (struct qos_entry_s *) entry;
  74         unsigned long flags;
  75
  76         spin_lock_irqsave(&qos_free_list.lock, flags);
  77         if (qos_free_list.cnt < MAX_FREE_LIST_CNT) {
  78                 list_add(&qentry->list, &qos_free_list.head);
  79                 qos_free_list.cnt++;
  80                 spin_unlock_irqrestore(&qos_free_list.lock, flags);
  81                 return;
  82         }
  83         spin_unlock_irqrestore(&qos_free_list.lock, flags);
  84
  85         kfree(entry);
  86 }
  87
  88 static void free_qos_entry_list(struct list_head *free_list)
  89 {
  90         struct qos_entry_s *entry, *n;
  91         int total_free = 0;
  92
  93         list_for_each_entry_safe(entry, n, free_list, list) {
  94                 list_del(&entry->list);
  95                 kfree(entry);
  96                 total_free++;
  97         }
  98
  99         dprintk("%s: total_free_cnt=%d\n", __func__, total_free);
 100 }
 101
 102 void gdm_qos_init(void *nic_ptr)
 103 {
 104         struct nic *nic = nic_ptr;
 105         struct qos_cb_s *qcb = &nic->qos;
 106         int i;
 107
 108         for (i = 0 ; i < QOS_MAX; i++) {
 109                 INIT_LIST_HEAD(&qcb->qos_list[i]);
 110                 qcb->csr[i].QoSBufCount = 0;
 111                 qcb->csr[i].Enabled = 0;
 112         }
 113
 114         qcb->qos_list_cnt = 0;
 115         qcb->qos_null_idx = QOS_MAX-1;
 116         qcb->qos_limit_size = 255;
 117
 118         spin_lock_init(&qcb->qos_lock);
 119
 120         init_qos_entry_list();
 121 }
 122
 123 void gdm_qos_release_list(void *nic_ptr)
 124 {
 125         struct nic *nic = nic_ptr;
 126         struct qos_cb_s *qcb = &nic->qos;
 127         unsigned long flags;
 128         struct qos_entry_s *entry, *n;
 129         struct list_head free_list;
 130         int i;
 131
 132         INIT_LIST_HEAD(&free_list);
 133
 134         spin_lock_irqsave(&qcb->qos_lock, flags);
 135
 136         for (i = 0; i < QOS_MAX; i++) {
 137                 qcb->csr[i].QoSBufCount = 0;
 138                 qcb->csr[i].Enabled = 0;
 139         }
 140
 141         qcb->qos_list_cnt = 0;
 142         qcb->qos_null_idx = QOS_MAX-1;
 143
 144         for (i = 0; i < QOS_MAX; i++) {
 145                 list_for_each_entry_safe(entry, n, &qcb->qos_list[i], list) {
 146                         list_move_tail(&entry->list, &free_list);
 147                 }
 148         }
 149         spin_unlock_irqrestore(&qcb->qos_lock, flags);
 150         free_qos_entry_list(&free_list);
 151 }
 152
 153 static u32 chk_ipv4_rule(struct gdm_wimax_csr_s *csr, u8 *Stream, u8 *port)
 154 {
 155         int i;
 156
 157         if (csr->ClassifierRuleEnable&IPTYPEOFSERVICE) {
 158                 if (((Stream[1] & csr->IPToSMask) < csr->IPToSLow) ||
 159                 ((Stream[1] & csr->IPToSMask) > csr->IPToSHigh))
 160                         return 1;
 161         }
 162
 163         if (csr->ClassifierRuleEnable&PROTOCOL) {
 164                 if (Stream[9] != csr->Protocol)
 165                         return 1;
 166         }
 167
 168         if (csr->ClassifierRuleEnable&IPMASKEDSRCADDRESS) {
 169                 for (i = 0; i < 4; i++) {
 170                         if ((Stream[12 + i] & csr->IPSrcAddrMask[i]) !=
 171                         (csr->IPSrcAddr[i] & csr->IPSrcAddrMask[i]))
 172                                 return 1;
 173                 }
 174         }
 175
 176         if (csr->ClassifierRuleEnable&IPMASKEDDSTADDRESS) {
 177                 for (i = 0; i < 4; i++) {
 178                         if ((Stream[16 + i] & csr->IPDstAddrMask[i]) !=
 179                         (csr->IPDstAddr[i] & csr->IPDstAddrMask[i]))
 180                                 return 1;
 181                 }
 182         }
 183
 184         if (csr->ClassifierRuleEnable&PROTOCOLSRCPORTRANGE) {
 185                 i = ((port[0]<<8)&0xff00)+port[1];
 186                 if ((i < csr->SrcPortLow) || (i > csr->SrcPortHigh))
 187                         return 1;
 188         }
 189
 190         if (csr->ClassifierRuleEnable&PROTOCOLDSTPORTRANGE) {
 191                 i = ((port[2]<<8)&0xff00)+port[3];
 192                 if ((i < csr->DstPortLow) || (i > csr->DstPortHigh))
 193                         return 1;
 194         }
 195
 196         return 0;
 197 }
 198
 199 static u32 get_qos_index(struct nic *nic, u8* iph, u8* tcpudph)
 200 {
 201         u32     IP_Ver, Header_Len, i;
 202         struct qos_cb_s *qcb = &nic->qos;
 203
 204         if (iph == NULL || tcpudph == NULL)
 205                 return -1;
 206
 207         IP_Ver = (iph[0]>>4)&0xf;
 208         Header_Len = iph[0]&0xf;
 209
 210         if (IP_Ver == 4) {
 211                 for (i = 0; i < QOS_MAX; i++) {
 212                         if (qcb->csr[i].Enabled) {
 213                                 if (qcb->csr[i].ClassifierRuleEnable) {
 214                                         if (chk_ipv4_rule(&qcb->csr[i], iph,
 215                                         tcpudph) == 0)
 216                                                 return i;
 217                                 }
 218                         }
 219                 }
 220         }
 221
 222         return -1;
 223 }
 224
 225 static u32 extract_qos_list(struct nic *nic, struct list_head *head)
 226 {
 227         struct qos_cb_s *qcb = &nic->qos;
 228         struct qos_entry_s *entry;
 229         int i;
 230
 231         INIT_LIST_HEAD(head);
 232
 233         for (i = 0; i < QOS_MAX; i++) {
 234                 if (qcb->csr[i].Enabled) {
 235                         if (qcb->csr[i].QoSBufCount < qcb->qos_limit_size) {
 236                                 if (!list_empty(&qcb->qos_list[i])) {
 237                                         entry = list_entry(
 238                                         qcb->qos_list[i].prev,
 239                                         struct qos_entry_s, list);
 240                                         list_move_tail(&entry->list, head);
 241                                         qcb->csr[i].QoSBufCount++;
 242
 243                                         if (!list_empty(&qcb->qos_list[i]))
 244                                                 wprintk("QoS Index(%d) "
 245                                                         "is piled!!\n", i);
 246                                 }
 247                         }
 248                 }
 249         }
 250
 251         return 0;
 252 }
 253
 254 static void send_qos_list(struct nic *nic, struct list_head *head)
 255 {
 256         struct qos_entry_s *entry, *n;
 257
 258         list_for_each_entry_safe(entry, n, head, list) {
 259                 list_del(&entry->list);
 260                 free_qos_entry(entry);
 261                 gdm_wimax_send_tx(entry->skb, entry->dev);
 262         }
 263 }
 264
 265 int gdm_qos_send_hci_pkt(struct sk_buff *skb, struct net_device *dev)
 266 {
 267         struct nic *nic = netdev_priv(dev);
 268         int index;
 269         struct qos_cb_s *qcb = &nic->qos;
 270         unsigned long flags;
 271         struct ethhdr *ethh = (struct ethhdr *) (skb->data + HCI_HEADER_SIZE);
 272         struct iphdr *iph = (struct iphdr *) ((char *) ethh + ETH_HLEN);
 273         struct tcphdr *tcph;
 274         struct qos_entry_s *entry = NULL;
 275         struct list_head send_list;
 276         int ret = 0;
 277
 278         tcph = (struct tcphdr *) iph + iph->ihl*4;
 279
 280         if (B2H(ethh->h_proto) == ETH_P_IP) {
 281                 if (qcb->qos_list_cnt && !qos_free_list.cnt) {
 282                         entry = alloc_qos_entry();
 283                         entry->skb = skb;
 284                         entry->dev = dev;
 285                         dprintk("qcb->qos_list_cnt=%d\n", qcb->qos_list_cnt);
 286                 }
 287
 288                 spin_lock_irqsave(&qcb->qos_lock, flags);
 289                 if (qcb->qos_list_cnt) {
 290                         index = get_qos_index(nic, (u8 *)iph, (u8 *) tcph);
 291                         if (index == -1)
 292                                 index = qcb->qos_null_idx;
 293
 294                         if (!entry) {
 295                                 entry = alloc_qos_entry();
 296                                 entry->skb = skb;
 297                                 entry->dev = dev;
 298                         }
 299
 300                         list_add_tail(&entry->list, &qcb->qos_list[index]);
 301                         extract_qos_list(nic, &send_list);
 302                         spin_unlock_irqrestore(&qcb->qos_lock, flags);
 303                         send_qos_list(nic, &send_list);
 304                         goto out;
 305                 }
 306                 spin_unlock_irqrestore(&qcb->qos_lock, flags);
 307                 if (entry)
 308                         free_qos_entry(entry);
 309         }
 310
 311         ret = gdm_wimax_send_tx(skb, dev);
 312 out:
 313         return ret;
 314 }
 315
 316 static u32 get_csr(struct qos_cb_s *qcb, u32 SFID, int mode)
 317 {
 318         int i;
 319
 320         for (i = 0; i < qcb->qos_list_cnt; i++) {
 321                 if (qcb->csr[i].SFID == SFID)
 322                         return i;
 323         }
 324
 325         if (mode) {
 326                 for (i = 0; i < QOS_MAX; i++) {
 327                         if (qcb->csr[i].Enabled == 0) {
 328                                 qcb->csr[i].Enabled = 1;
 329                                 qcb->qos_list_cnt++;
 330                                 return i;
 331                         }
 332                 }
 333         }
 334         return -1;
 335 }
 336
 337 #define QOS_CHANGE_DEL  0xFC
 338 #define QOS_ADD         0xFD
 339 #define QOS_REPORT      0xFE
 340
 341 void gdm_recv_qos_hci_packet(void *nic_ptr, u8 *buf, int size)
 342 {
 343         struct nic *nic = nic_ptr;
 344         u32 i, SFID, index, pos;
 345         u8 subCmdEvt;
 346         u8 len;
 347         struct qos_cb_s *qcb = &nic->qos;
 348         struct qos_entry_s *entry, *n;
 349         struct list_head send_list;
 350         struct list_head free_list;
 351         unsigned long flags;
 352
 353         subCmdEvt = (u8)buf[4];
 354
 355         if (subCmdEvt == QOS_REPORT) {
 356                 len = (u8)buf[5];
 357
 358                 spin_lock_irqsave(&qcb->qos_lock, flags);
 359                 for (i = 0; i < qcb->qos_list_cnt; i++) {
 360                         SFID = ((buf[(i*5)+6]<<24)&0xff000000);
 361                         SFID += ((buf[(i*5)+7]<<16)&0xff0000);
 362                         SFID += ((buf[(i*5)+8]<<8)&0xff00);
 363                         SFID += (buf[(i*5)+9]);
 364                         index = get_csr(qcb, SFID, 0);
 365                         if (index == -1) {
 366                                 spin_unlock_irqrestore(&qcb->qos_lock, flags);
 367                                 eprintk("QoS ERROR: No SF\n");
 368                                 return;
 369                         }
 370                         qcb->csr[index].QoSBufCount = buf[(i*5)+10];
 371                 }
 372
 373                 extract_qos_list(nic, &send_list);
 374                 spin_unlock_irqrestore(&qcb->qos_lock, flags);
 375                 send_qos_list(nic, &send_list);
 376                 return;
 377         } else if (subCmdEvt == QOS_ADD) {
 378                 pos = 5;
 379                 len = (u8)buf[pos++];
 380
 381                 SFID = ((buf[pos++]<<24)&0xff000000);
 382                 SFID += ((buf[pos++]<<16)&0xff0000);
 383                 SFID += ((buf[pos++]<<8)&0xff00);
 384                 SFID += (buf[pos++]);
 385
 386                 index = get_csr(qcb, SFID, 1);
 387                 if (index == -1) {
 388                         eprintk("QoS ERROR: csr Update Error\n");
 389                         return;
 390                 }
 391
 392                 dprintk("QOS_ADD SFID = 0x%x, index=%d\n", SFID, index);
 393
 394                 spin_lock_irqsave(&qcb->qos_lock, flags);
 395                 qcb->csr[index].SFID = SFID;
 396                 qcb->csr[index].ClassifierRuleEnable = ((buf[pos++]<<8)&0xff00);
 397                 qcb->csr[index].ClassifierRuleEnable += buf[pos++];
 398                 if (qcb->csr[index].ClassifierRuleEnable == 0)
 399                         qcb->qos_null_idx = index;
 400                 qcb->csr[index].IPToSMask = buf[pos++];
 401                 qcb->csr[index].IPToSLow = buf[pos++];
 402                 qcb->csr[index].IPToSHigh = buf[pos++];
 403                 qcb->csr[index].Protocol = buf[pos++];
 404                 qcb->csr[index].IPSrcAddrMask[0] = buf[pos++];
 405                 qcb->csr[index].IPSrcAddrMask[1] = buf[pos++];
 406                 qcb->csr[index].IPSrcAddrMask[2] = buf[pos++];
 407                 qcb->csr[index].IPSrcAddrMask[3] = buf[pos++];
 408                 qcb->csr[index].IPSrcAddr[0] = buf[pos++];
 409                 qcb->csr[index].IPSrcAddr[1] = buf[pos++];
 410                 qcb->csr[index].IPSrcAddr[2] = buf[pos++];
 411                 qcb->csr[index].IPSrcAddr[3] = buf[pos++];
 412                 qcb->csr[index].IPDstAddrMask[0] = buf[pos++];
 413                 qcb->csr[index].IPDstAddrMask[1] = buf[pos++];
 414                 qcb->csr[index].IPDstAddrMask[2] = buf[pos++];
 415                 qcb->csr[index].IPDstAddrMask[3] = buf[pos++];
 416                 qcb->csr[index].IPDstAddr[0] = buf[pos++];
 417                 qcb->csr[index].IPDstAddr[1] = buf[pos++];
 418                 qcb->csr[index].IPDstAddr[2] = buf[pos++];
 419                 qcb->csr[index].IPDstAddr[3] = buf[pos++];
 420                 qcb->csr[index].SrcPortLow = ((buf[pos++]<<8)&0xff00);
 421                 qcb->csr[index].SrcPortLow += buf[pos++];
 422                 qcb->csr[index].SrcPortHigh = ((buf[pos++]<<8)&0xff00);
 423                 qcb->csr[index].SrcPortHigh += buf[pos++];
 424                 qcb->csr[index].DstPortLow = ((buf[pos++]<<8)&0xff00);
 425                 qcb->csr[index].DstPortLow += buf[pos++];
 426                 qcb->csr[index].DstPortHigh = ((buf[pos++]<<8)&0xff00);
 427                 qcb->csr[index].DstPortHigh += buf[pos++];
 428
 429                 qcb->qos_limit_size = 254/qcb->qos_list_cnt;
 430                 spin_unlock_irqrestore(&qcb->qos_lock, flags);
 431         } else if (subCmdEvt == QOS_CHANGE_DEL) {
 432                 pos = 5;
 433                 len = (u8)buf[pos++];
 434                 SFID = ((buf[pos++]<<24)&0xff000000);
 435                 SFID += ((buf[pos++]<<16)&0xff0000);
 436                 SFID += ((buf[pos++]<<8)&0xff00);
 437                 SFID += (buf[pos++]);
 438                 index = get_csr(qcb, SFID, 1);
 439                 if (index == -1) {
 440                         eprintk("QoS ERROR: Wrong index(%d)\n", index);
 441                         return;
 442                 }
 443
 444                 dprintk("QOS_CHANGE_DEL SFID = 0x%x, index=%d\n", SFID, index);
 445
 446                 INIT_LIST_HEAD(&free_list);
 447
 448                 spin_lock_irqsave(&qcb->qos_lock, flags);
 449                 qcb->csr[index].Enabled = 0;
 450                 qcb->qos_list_cnt--;
 451                 qcb->qos_limit_size = 254/qcb->qos_list_cnt;
 452
 453                 list_for_each_entry_safe(entry, n, &qcb->qos_list[index],
 454                                         list) {
 455                         list_move_tail(&entry->list, &free_list);
 456                 }
 457                 spin_unlock_irqrestore(&qcb->qos_lock, flags);
 458                 free_qos_entry_list(&free_list);
 459         }
 460 }