Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame^] | 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 | } |