| 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 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 15 | |
| 16 | #include <linux/etherdevice.h> |
| 17 | #include <asm/byteorder.h> |
| 18 | |
| 19 | #include <linux/ip.h> |
| 20 | #include <linux/tcp.h> |
| 21 | #include <linux/if_ether.h> |
| 22 | |
| 23 | #include "gdm_wimax.h" |
| 24 | #include "hci.h" |
| 25 | #include "gdm_qos.h" |
| 26 | |
| 27 | #define B2H(x) __be16_to_cpu(x) |
| 28 | |
| 29 | #define MAX_FREE_LIST_CNT 32 |
| 30 | static struct { |
| 31 | struct list_head head; |
| 32 | int cnt; |
| 33 | spinlock_t lock; |
| 34 | } qos_free_list; |
| 35 | |
| 36 | static void init_qos_entry_list(void) |
| 37 | { |
| 38 | qos_free_list.cnt = 0; |
| 39 | INIT_LIST_HEAD(&qos_free_list.head); |
| 40 | spin_lock_init(&qos_free_list.lock); |
| 41 | } |
| 42 | |
| 43 | static void *alloc_qos_entry(void) |
| 44 | { |
| 45 | struct qos_entry_s *entry; |
| 46 | unsigned long flags; |
| 47 | |
| 48 | spin_lock_irqsave(&qos_free_list.lock, flags); |
| 49 | if (qos_free_list.cnt) { |
| 50 | entry = list_entry(qos_free_list.head.prev, struct qos_entry_s, |
| 51 | list); |
| 52 | list_del(&entry->list); |
| 53 | qos_free_list.cnt--; |
| 54 | spin_unlock_irqrestore(&qos_free_list.lock, flags); |
| 55 | return entry; |
| 56 | } |
| 57 | spin_unlock_irqrestore(&qos_free_list.lock, flags); |
| 58 | |
| 59 | entry = kmalloc(sizeof(struct qos_entry_s), GFP_ATOMIC); |
| 60 | return entry; |
| 61 | } |
| 62 | |
| 63 | static void free_qos_entry(void *entry) |
| 64 | { |
| 65 | struct qos_entry_s *qentry = (struct qos_entry_s *) entry; |
| 66 | unsigned long flags; |
| 67 | |
| 68 | spin_lock_irqsave(&qos_free_list.lock, flags); |
| 69 | if (qos_free_list.cnt < MAX_FREE_LIST_CNT) { |
| 70 | list_add(&qentry->list, &qos_free_list.head); |
| 71 | qos_free_list.cnt++; |
| 72 | spin_unlock_irqrestore(&qos_free_list.lock, flags); |
| 73 | return; |
| 74 | } |
| 75 | spin_unlock_irqrestore(&qos_free_list.lock, flags); |
| 76 | |
| 77 | kfree(entry); |
| 78 | } |
| 79 | |
| 80 | static void free_qos_entry_list(struct list_head *free_list) |
| 81 | { |
| 82 | struct qos_entry_s *entry, *n; |
| 83 | int total_free = 0; |
| 84 | |
| 85 | list_for_each_entry_safe(entry, n, free_list, list) { |
| 86 | list_del(&entry->list); |
| 87 | kfree(entry); |
| 88 | total_free++; |
| 89 | } |
| 90 | |
| 91 | pr_debug("%s: total_free_cnt=%d\n", __func__, total_free); |
| 92 | } |
| 93 | |
| 94 | void gdm_qos_init(void *nic_ptr) |
| 95 | { |
| 96 | struct nic *nic = nic_ptr; |
| 97 | struct qos_cb_s *qcb = &nic->qos; |
| 98 | int i; |
| 99 | |
| 100 | for (i = 0 ; i < QOS_MAX; i++) { |
| 101 | INIT_LIST_HEAD(&qcb->qos_list[i]); |
| 102 | qcb->csr[i].qos_buf_count = 0; |
| 103 | qcb->csr[i].enabled = 0; |
| 104 | } |
| 105 | |
| 106 | qcb->qos_list_cnt = 0; |
| 107 | qcb->qos_null_idx = QOS_MAX-1; |
| 108 | qcb->qos_limit_size = 255; |
| 109 | |
| 110 | spin_lock_init(&qcb->qos_lock); |
| 111 | |
| 112 | init_qos_entry_list(); |
| 113 | } |
| 114 | |
| 115 | void gdm_qos_release_list(void *nic_ptr) |
| 116 | { |
| 117 | struct nic *nic = nic_ptr; |
| 118 | struct qos_cb_s *qcb = &nic->qos; |
| 119 | unsigned long flags; |
| 120 | struct qos_entry_s *entry, *n; |
| 121 | struct list_head free_list; |
| 122 | int i; |
| 123 | |
| 124 | INIT_LIST_HEAD(&free_list); |
| 125 | |
| 126 | spin_lock_irqsave(&qcb->qos_lock, flags); |
| 127 | |
| 128 | for (i = 0; i < QOS_MAX; i++) { |
| 129 | qcb->csr[i].qos_buf_count = 0; |
| 130 | qcb->csr[i].enabled = 0; |
| 131 | } |
| 132 | |
| 133 | qcb->qos_list_cnt = 0; |
| 134 | qcb->qos_null_idx = QOS_MAX-1; |
| 135 | |
| 136 | for (i = 0; i < QOS_MAX; i++) { |
| 137 | list_for_each_entry_safe(entry, n, &qcb->qos_list[i], list) { |
| 138 | list_move_tail(&entry->list, &free_list); |
| 139 | } |
| 140 | } |
| 141 | spin_unlock_irqrestore(&qcb->qos_lock, flags); |
| 142 | free_qos_entry_list(&free_list); |
| 143 | } |
| 144 | |
| 145 | static u32 chk_ipv4_rule(struct gdm_wimax_csr_s *csr, u8 *Stream, u8 *port) |
| 146 | { |
| 147 | int i; |
| 148 | |
| 149 | if (csr->classifier_rule_en&IPTYPEOFSERVICE) { |
| 150 | if (((Stream[1] & csr->ip2s_mask) < csr->ip2s_lo) || |
| 151 | ((Stream[1] & csr->ip2s_mask) > csr->ip2s_hi)) |
| 152 | return 1; |
| 153 | } |
| 154 | |
| 155 | if (csr->classifier_rule_en&PROTOCOL) { |
| 156 | if (Stream[9] != csr->protocol) |
| 157 | return 1; |
| 158 | } |
| 159 | |
| 160 | if (csr->classifier_rule_en&IPMASKEDSRCADDRESS) { |
| 161 | for (i = 0; i < 4; i++) { |
| 162 | if ((Stream[12 + i] & csr->ipsrc_addrmask[i]) != |
| 163 | (csr->ipsrc_addr[i] & csr->ipsrc_addrmask[i])) |
| 164 | return 1; |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | if (csr->classifier_rule_en&IPMASKEDDSTADDRESS) { |
| 169 | for (i = 0; i < 4; i++) { |
| 170 | if ((Stream[16 + i] & csr->ipdst_addrmask[i]) != |
| 171 | (csr->ipdst_addr[i] & csr->ipdst_addrmask[i])) |
| 172 | return 1; |
| 173 | } |
| 174 | } |
| 175 | |
| 176 | if (csr->classifier_rule_en&PROTOCOLSRCPORTRANGE) { |
| 177 | i = ((port[0]<<8)&0xff00)+port[1]; |
| 178 | if ((i < csr->srcport_lo) || (i > csr->srcport_hi)) |
| 179 | return 1; |
| 180 | } |
| 181 | |
| 182 | if (csr->classifier_rule_en&PROTOCOLDSTPORTRANGE) { |
| 183 | i = ((port[2]<<8)&0xff00)+port[3]; |
| 184 | if ((i < csr->dstport_lo) || (i > csr->dstport_hi)) |
| 185 | return 1; |
| 186 | } |
| 187 | |
| 188 | return 0; |
| 189 | } |
| 190 | |
| 191 | static u32 get_qos_index(struct nic *nic, u8 *iph, u8 *tcpudph) |
| 192 | { |
| 193 | u32 IP_Ver, Header_Len, i; |
| 194 | struct qos_cb_s *qcb = &nic->qos; |
| 195 | |
| 196 | if (iph == NULL || tcpudph == NULL) |
| 197 | return -1; |
| 198 | |
| 199 | IP_Ver = (iph[0]>>4)&0xf; |
| 200 | Header_Len = iph[0]&0xf; |
| 201 | |
| 202 | if (IP_Ver == 4) { |
| 203 | for (i = 0; i < QOS_MAX; i++) { |
| 204 | if (qcb->csr[i].enabled) { |
| 205 | if (qcb->csr[i].classifier_rule_en) { |
| 206 | if (chk_ipv4_rule(&qcb->csr[i], iph, |
| 207 | tcpudph) == 0) |
| 208 | return i; |
| 209 | } |
| 210 | } |
| 211 | } |
| 212 | } |
| 213 | |
| 214 | return -1; |
| 215 | } |
| 216 | |
| 217 | static u32 extract_qos_list(struct nic *nic, struct list_head *head) |
| 218 | { |
| 219 | struct qos_cb_s *qcb = &nic->qos; |
| 220 | struct qos_entry_s *entry; |
| 221 | int i; |
| 222 | |
| 223 | INIT_LIST_HEAD(head); |
| 224 | |
| 225 | for (i = 0; i < QOS_MAX; i++) { |
| 226 | if (qcb->csr[i].enabled) { |
| 227 | if (qcb->csr[i].qos_buf_count < qcb->qos_limit_size) { |
| 228 | if (!list_empty(&qcb->qos_list[i])) { |
| 229 | entry = list_entry( |
| 230 | qcb->qos_list[i].prev, |
| 231 | struct qos_entry_s, list); |
| 232 | list_move_tail(&entry->list, head); |
| 233 | qcb->csr[i].qos_buf_count++; |
| 234 | |
| 235 | if (!list_empty(&qcb->qos_list[i])) |
| 236 | netdev_warn(nic->netdev, |
| 237 | "Index(%d) is piled!!\n", |
| 238 | i); |
| 239 | } |
| 240 | } |
| 241 | } |
| 242 | } |
| 243 | |
| 244 | return 0; |
| 245 | } |
| 246 | |
| 247 | static void send_qos_list(struct nic *nic, struct list_head *head) |
| 248 | { |
| 249 | struct qos_entry_s *entry, *n; |
| 250 | |
| 251 | list_for_each_entry_safe(entry, n, head, list) { |
| 252 | list_del(&entry->list); |
| 253 | free_qos_entry(entry); |
| 254 | gdm_wimax_send_tx(entry->skb, entry->dev); |
| 255 | } |
| 256 | } |
| 257 | |
| 258 | int gdm_qos_send_hci_pkt(struct sk_buff *skb, struct net_device *dev) |
| 259 | { |
| 260 | struct nic *nic = netdev_priv(dev); |
| 261 | int index; |
| 262 | struct qos_cb_s *qcb = &nic->qos; |
| 263 | unsigned long flags; |
| 264 | struct ethhdr *ethh = (struct ethhdr *) (skb->data + HCI_HEADER_SIZE); |
| 265 | struct iphdr *iph = (struct iphdr *) ((char *) ethh + ETH_HLEN); |
| 266 | struct tcphdr *tcph; |
| 267 | struct qos_entry_s *entry = NULL; |
| 268 | struct list_head send_list; |
| 269 | int ret = 0; |
| 270 | |
| 271 | tcph = (struct tcphdr *) iph + iph->ihl*4; |
| 272 | |
| 273 | if (B2H(ethh->h_proto) == ETH_P_IP) { |
| 274 | if (qcb->qos_list_cnt && !qos_free_list.cnt) { |
| 275 | entry = alloc_qos_entry(); |
| 276 | entry->skb = skb; |
| 277 | entry->dev = dev; |
| 278 | netdev_dbg(dev, "qcb->qos_list_cnt=%d\n", |
| 279 | qcb->qos_list_cnt); |
| 280 | } |
| 281 | |
| 282 | spin_lock_irqsave(&qcb->qos_lock, flags); |
| 283 | if (qcb->qos_list_cnt) { |
| 284 | index = get_qos_index(nic, (u8 *)iph, (u8 *) tcph); |
| 285 | if (index == -1) |
| 286 | index = qcb->qos_null_idx; |
| 287 | |
| 288 | if (!entry) { |
| 289 | entry = alloc_qos_entry(); |
| 290 | entry->skb = skb; |
| 291 | entry->dev = dev; |
| 292 | } |
| 293 | |
| 294 | list_add_tail(&entry->list, &qcb->qos_list[index]); |
| 295 | extract_qos_list(nic, &send_list); |
| 296 | spin_unlock_irqrestore(&qcb->qos_lock, flags); |
| 297 | send_qos_list(nic, &send_list); |
| 298 | goto out; |
| 299 | } |
| 300 | spin_unlock_irqrestore(&qcb->qos_lock, flags); |
| 301 | if (entry) |
| 302 | free_qos_entry(entry); |
| 303 | } |
| 304 | |
| 305 | ret = gdm_wimax_send_tx(skb, dev); |
| 306 | out: |
| 307 | return ret; |
| 308 | } |
| 309 | |
| 310 | static u32 get_csr(struct qos_cb_s *qcb, u32 SFID, int mode) |
| 311 | { |
| 312 | int i; |
| 313 | |
| 314 | for (i = 0; i < qcb->qos_list_cnt; i++) { |
| 315 | if (qcb->csr[i].SFID == SFID) |
| 316 | return i; |
| 317 | } |
| 318 | |
| 319 | if (mode) { |
| 320 | for (i = 0; i < QOS_MAX; i++) { |
| 321 | if (qcb->csr[i].enabled == 0) { |
| 322 | qcb->csr[i].enabled = 1; |
| 323 | qcb->qos_list_cnt++; |
| 324 | return i; |
| 325 | } |
| 326 | } |
| 327 | } |
| 328 | return -1; |
| 329 | } |
| 330 | |
| 331 | #define QOS_CHANGE_DEL 0xFC |
| 332 | #define QOS_ADD 0xFD |
| 333 | #define QOS_REPORT 0xFE |
| 334 | |
| 335 | void gdm_recv_qos_hci_packet(void *nic_ptr, u8 *buf, int size) |
| 336 | { |
| 337 | struct nic *nic = nic_ptr; |
| 338 | u32 i, SFID, index, pos; |
| 339 | u8 subCmdEvt; |
| 340 | struct qos_cb_s *qcb = &nic->qos; |
| 341 | struct qos_entry_s *entry, *n; |
| 342 | struct list_head send_list; |
| 343 | struct list_head free_list; |
| 344 | unsigned long flags; |
| 345 | |
| 346 | subCmdEvt = (u8)buf[4]; |
| 347 | |
| 348 | if (subCmdEvt == QOS_REPORT) { |
| 349 | spin_lock_irqsave(&qcb->qos_lock, flags); |
| 350 | for (i = 0; i < qcb->qos_list_cnt; i++) { |
| 351 | SFID = ((buf[(i*5)+6]<<24)&0xff000000); |
| 352 | SFID += ((buf[(i*5)+7]<<16)&0xff0000); |
| 353 | SFID += ((buf[(i*5)+8]<<8)&0xff00); |
| 354 | SFID += (buf[(i*5)+9]); |
| 355 | index = get_csr(qcb, SFID, 0); |
| 356 | if (index == -1) { |
| 357 | spin_unlock_irqrestore(&qcb->qos_lock, flags); |
| 358 | netdev_err(nic->netdev, "QoS ERROR: No SF\n"); |
| 359 | return; |
| 360 | } |
| 361 | qcb->csr[index].qos_buf_count = buf[(i*5)+10]; |
| 362 | } |
| 363 | |
| 364 | extract_qos_list(nic, &send_list); |
| 365 | spin_unlock_irqrestore(&qcb->qos_lock, flags); |
| 366 | send_qos_list(nic, &send_list); |
| 367 | return; |
| 368 | } |
| 369 | |
| 370 | /* subCmdEvt == QOS_ADD || subCmdEvt == QOS_CHANG_DEL */ |
| 371 | pos = 6; |
| 372 | SFID = ((buf[pos++]<<24)&0xff000000); |
| 373 | SFID += ((buf[pos++]<<16)&0xff0000); |
| 374 | SFID += ((buf[pos++]<<8)&0xff00); |
| 375 | SFID += (buf[pos++]); |
| 376 | |
| 377 | index = get_csr(qcb, SFID, 1); |
| 378 | if (index == -1) { |
| 379 | netdev_err(nic->netdev, |
| 380 | "QoS ERROR: csr Update Error / Wrong index (%d) \n", |
| 381 | index); |
| 382 | return; |
| 383 | } |
| 384 | |
| 385 | if (subCmdEvt == QOS_ADD) { |
| 386 | netdev_dbg(nic->netdev, "QOS_ADD SFID = 0x%x, index=%d\n", |
| 387 | SFID, index); |
| 388 | |
| 389 | spin_lock_irqsave(&qcb->qos_lock, flags); |
| 390 | qcb->csr[index].SFID = SFID; |
| 391 | qcb->csr[index].classifier_rule_en = ((buf[pos++]<<8)&0xff00); |
| 392 | qcb->csr[index].classifier_rule_en += buf[pos++]; |
| 393 | if (qcb->csr[index].classifier_rule_en == 0) |
| 394 | qcb->qos_null_idx = index; |
| 395 | qcb->csr[index].ip2s_mask = buf[pos++]; |
| 396 | qcb->csr[index].ip2s_lo = buf[pos++]; |
| 397 | qcb->csr[index].ip2s_hi = buf[pos++]; |
| 398 | qcb->csr[index].protocol = buf[pos++]; |
| 399 | qcb->csr[index].ipsrc_addrmask[0] = buf[pos++]; |
| 400 | qcb->csr[index].ipsrc_addrmask[1] = buf[pos++]; |
| 401 | qcb->csr[index].ipsrc_addrmask[2] = buf[pos++]; |
| 402 | qcb->csr[index].ipsrc_addrmask[3] = buf[pos++]; |
| 403 | qcb->csr[index].ipsrc_addr[0] = buf[pos++]; |
| 404 | qcb->csr[index].ipsrc_addr[1] = buf[pos++]; |
| 405 | qcb->csr[index].ipsrc_addr[2] = buf[pos++]; |
| 406 | qcb->csr[index].ipsrc_addr[3] = buf[pos++]; |
| 407 | qcb->csr[index].ipdst_addrmask[0] = buf[pos++]; |
| 408 | qcb->csr[index].ipdst_addrmask[1] = buf[pos++]; |
| 409 | qcb->csr[index].ipdst_addrmask[2] = buf[pos++]; |
| 410 | qcb->csr[index].ipdst_addrmask[3] = buf[pos++]; |
| 411 | qcb->csr[index].ipdst_addr[0] = buf[pos++]; |
| 412 | qcb->csr[index].ipdst_addr[1] = buf[pos++]; |
| 413 | qcb->csr[index].ipdst_addr[2] = buf[pos++]; |
| 414 | qcb->csr[index].ipdst_addr[3] = buf[pos++]; |
| 415 | qcb->csr[index].srcport_lo = ((buf[pos++]<<8)&0xff00); |
| 416 | qcb->csr[index].srcport_lo += buf[pos++]; |
| 417 | qcb->csr[index].srcport_hi = ((buf[pos++]<<8)&0xff00); |
| 418 | qcb->csr[index].srcport_hi += buf[pos++]; |
| 419 | qcb->csr[index].dstport_lo = ((buf[pos++]<<8)&0xff00); |
| 420 | qcb->csr[index].dstport_lo += buf[pos++]; |
| 421 | qcb->csr[index].dstport_hi = ((buf[pos++]<<8)&0xff00); |
| 422 | qcb->csr[index].dstport_hi += buf[pos++]; |
| 423 | |
| 424 | qcb->qos_limit_size = 254/qcb->qos_list_cnt; |
| 425 | spin_unlock_irqrestore(&qcb->qos_lock, flags); |
| 426 | } else if (subCmdEvt == QOS_CHANGE_DEL) { |
| 427 | netdev_dbg(nic->netdev, "QOS_CHANGE_DEL SFID = 0x%x, index=%d\n", |
| 428 | SFID, index); |
| 429 | |
| 430 | INIT_LIST_HEAD(&free_list); |
| 431 | |
| 432 | spin_lock_irqsave(&qcb->qos_lock, flags); |
| 433 | qcb->csr[index].enabled = 0; |
| 434 | qcb->qos_list_cnt--; |
| 435 | qcb->qos_limit_size = 254/qcb->qos_list_cnt; |
| 436 | |
| 437 | list_for_each_entry_safe(entry, n, &qcb->qos_list[index], |
| 438 | list) { |
| 439 | list_move_tail(&entry->list, &free_list); |
| 440 | } |
| 441 | spin_unlock_irqrestore(&qcb->qos_lock, flags); |
| 442 | free_qos_entry_list(&free_list); |
| 443 | } |
| 444 | } |