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 MAX_FREE_LIST_CNT 32
28 static struct {
29 struct list_head head;
30 int cnt;
31 spinlock_t lock;
32 } qos_free_list;
33
init_qos_entry_list(void)34 static void init_qos_entry_list(void)
35 {
36 qos_free_list.cnt = 0;
37 INIT_LIST_HEAD(&qos_free_list.head);
38 spin_lock_init(&qos_free_list.lock);
39 }
40
alloc_qos_entry(void)41 static void *alloc_qos_entry(void)
42 {
43 struct qos_entry_s *entry;
44 unsigned long flags;
45
46 spin_lock_irqsave(&qos_free_list.lock, flags);
47 if (qos_free_list.cnt) {
48 entry = list_entry(qos_free_list.head.prev, struct qos_entry_s,
49 list);
50 list_del(&entry->list);
51 qos_free_list.cnt--;
52 spin_unlock_irqrestore(&qos_free_list.lock, flags);
53 return entry;
54 }
55 spin_unlock_irqrestore(&qos_free_list.lock, flags);
56
57 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
58 return entry;
59 }
60
free_qos_entry(void * entry)61 static void free_qos_entry(void *entry)
62 {
63 struct qos_entry_s *qentry = (struct qos_entry_s *)entry;
64 unsigned long flags;
65
66 spin_lock_irqsave(&qos_free_list.lock, flags);
67 if (qos_free_list.cnt < MAX_FREE_LIST_CNT) {
68 list_add(&qentry->list, &qos_free_list.head);
69 qos_free_list.cnt++;
70 spin_unlock_irqrestore(&qos_free_list.lock, flags);
71 return;
72 }
73 spin_unlock_irqrestore(&qos_free_list.lock, flags);
74
75 kfree(entry);
76 }
77
free_qos_entry_list(struct list_head * free_list)78 static void free_qos_entry_list(struct list_head *free_list)
79 {
80 struct qos_entry_s *entry, *n;
81 int total_free = 0;
82
83 list_for_each_entry_safe(entry, n, free_list, list) {
84 list_del(&entry->list);
85 kfree(entry);
86 total_free++;
87 }
88
89 pr_debug("%s: total_free_cnt=%d\n", __func__, total_free);
90 }
91
gdm_qos_init(void * nic_ptr)92 void gdm_qos_init(void *nic_ptr)
93 {
94 struct nic *nic = nic_ptr;
95 struct qos_cb_s *qcb = &nic->qos;
96 int i;
97
98 for (i = 0; i < QOS_MAX; i++) {
99 INIT_LIST_HEAD(&qcb->qos_list[i]);
100 qcb->csr[i].qos_buf_count = 0;
101 qcb->csr[i].enabled = false;
102 }
103
104 qcb->qos_list_cnt = 0;
105 qcb->qos_null_idx = QOS_MAX-1;
106 qcb->qos_limit_size = 255;
107
108 spin_lock_init(&qcb->qos_lock);
109
110 init_qos_entry_list();
111 }
112
gdm_qos_release_list(void * nic_ptr)113 void gdm_qos_release_list(void *nic_ptr)
114 {
115 struct nic *nic = nic_ptr;
116 struct qos_cb_s *qcb = &nic->qos;
117 unsigned long flags;
118 struct qos_entry_s *entry, *n;
119 struct list_head free_list;
120 int i;
121
122 INIT_LIST_HEAD(&free_list);
123
124 spin_lock_irqsave(&qcb->qos_lock, flags);
125
126 for (i = 0; i < QOS_MAX; i++) {
127 qcb->csr[i].qos_buf_count = 0;
128 qcb->csr[i].enabled = false;
129 }
130
131 qcb->qos_list_cnt = 0;
132 qcb->qos_null_idx = QOS_MAX-1;
133
134 for (i = 0; i < QOS_MAX; i++) {
135 list_for_each_entry_safe(entry, n, &qcb->qos_list[i], list) {
136 list_move_tail(&entry->list, &free_list);
137 }
138 }
139 spin_unlock_irqrestore(&qcb->qos_lock, flags);
140 free_qos_entry_list(&free_list);
141 }
142
chk_ipv4_rule(struct gdm_wimax_csr_s * csr,u8 * stream,u8 * port)143 static int chk_ipv4_rule(struct gdm_wimax_csr_s *csr, u8 *stream, u8 *port)
144 {
145 int i;
146
147 if (csr->classifier_rule_en&IPTYPEOFSERVICE) {
148 if (((stream[1] & csr->ip2s_mask) < csr->ip2s_lo) ||
149 ((stream[1] & csr->ip2s_mask) > csr->ip2s_hi))
150 return 1;
151 }
152
153 if (csr->classifier_rule_en&PROTOCOL) {
154 if (stream[9] != csr->protocol)
155 return 1;
156 }
157
158 if (csr->classifier_rule_en&IPMASKEDSRCADDRESS) {
159 for (i = 0; i < 4; i++) {
160 if ((stream[12 + i] & csr->ipsrc_addrmask[i]) !=
161 (csr->ipsrc_addr[i] & csr->ipsrc_addrmask[i]))
162 return 1;
163 }
164 }
165
166 if (csr->classifier_rule_en&IPMASKEDDSTADDRESS) {
167 for (i = 0; i < 4; i++) {
168 if ((stream[16 + i] & csr->ipdst_addrmask[i]) !=
169 (csr->ipdst_addr[i] & csr->ipdst_addrmask[i]))
170 return 1;
171 }
172 }
173
174 if (csr->classifier_rule_en&PROTOCOLSRCPORTRANGE) {
175 i = ((port[0]<<8)&0xff00)+port[1];
176 if ((i < csr->srcport_lo) || (i > csr->srcport_hi))
177 return 1;
178 }
179
180 if (csr->classifier_rule_en&PROTOCOLDSTPORTRANGE) {
181 i = ((port[2]<<8)&0xff00)+port[3];
182 if ((i < csr->dstport_lo) || (i > csr->dstport_hi))
183 return 1;
184 }
185
186 return 0;
187 }
188
get_qos_index(struct nic * nic,u8 * iph,u8 * tcpudph)189 static int get_qos_index(struct nic *nic, u8 *iph, u8 *tcpudph)
190 {
191 int ip_ver, i;
192 struct qos_cb_s *qcb = &nic->qos;
193
194 if (iph == NULL || tcpudph == NULL)
195 return -1;
196
197 ip_ver = (iph[0]>>4)&0xf;
198
199 if (ip_ver != 4)
200 return -1;
201
202 for (i = 0; i < QOS_MAX; i++) {
203 if (!qcb->csr[i].enabled)
204 continue;
205 if (!qcb->csr[i].classifier_rule_en)
206 continue;
207 if (chk_ipv4_rule(&qcb->csr[i], iph, tcpudph) == 0)
208 return i;
209 }
210
211 return -1;
212 }
213
extract_qos_list(struct nic * nic,struct list_head * head)214 static void extract_qos_list(struct nic *nic, struct list_head *head)
215 {
216 struct qos_cb_s *qcb = &nic->qos;
217 struct qos_entry_s *entry;
218 int i;
219
220 INIT_LIST_HEAD(head);
221
222 for (i = 0; i < QOS_MAX; i++) {
223 if (!qcb->csr[i].enabled)
224 continue;
225 if (qcb->csr[i].qos_buf_count >= qcb->qos_limit_size)
226 continue;
227 if (list_empty(&qcb->qos_list[i]))
228 continue;
229
230 entry = list_entry(qcb->qos_list[i].prev, struct qos_entry_s,
231 list);
232
233 list_move_tail(&entry->list, head);
234 qcb->csr[i].qos_buf_count++;
235
236 if (!list_empty(&qcb->qos_list[i]))
237 netdev_warn(nic->netdev, "Index(%d) is piled!!\n", i);
238 }
239 }
240
send_qos_list(struct nic * nic,struct list_head * head)241 static void send_qos_list(struct nic *nic, struct list_head *head)
242 {
243 struct qos_entry_s *entry, *n;
244
245 list_for_each_entry_safe(entry, n, head, list) {
246 list_del(&entry->list);
247 gdm_wimax_send_tx(entry->skb, entry->dev);
248 free_qos_entry(entry);
249 }
250 }
251
gdm_qos_send_hci_pkt(struct sk_buff * skb,struct net_device * dev)252 int gdm_qos_send_hci_pkt(struct sk_buff *skb, struct net_device *dev)
253 {
254 struct nic *nic = netdev_priv(dev);
255 int index;
256 struct qos_cb_s *qcb = &nic->qos;
257 unsigned long flags;
258 struct ethhdr *ethh = (struct ethhdr *)(skb->data + HCI_HEADER_SIZE);
259 struct iphdr *iph = (struct iphdr *)((char *)ethh + ETH_HLEN);
260 struct tcphdr *tcph;
261 struct qos_entry_s *entry = NULL;
262 struct list_head send_list;
263 int ret = 0;
264
265 tcph = (struct tcphdr *)iph + iph->ihl*4;
266
267 if (ethh->h_proto == cpu_to_be16(ETH_P_IP)) {
268 if (qcb->qos_list_cnt && !qos_free_list.cnt) {
269 entry = alloc_qos_entry();
270 entry->skb = skb;
271 entry->dev = dev;
272 netdev_dbg(dev, "qcb->qos_list_cnt=%d\n",
273 qcb->qos_list_cnt);
274 }
275
276 spin_lock_irqsave(&qcb->qos_lock, flags);
277 if (qcb->qos_list_cnt) {
278 index = get_qos_index(nic, (u8 *)iph, (u8 *)tcph);
279 if (index == -1)
280 index = qcb->qos_null_idx;
281
282 if (!entry) {
283 entry = alloc_qos_entry();
284 entry->skb = skb;
285 entry->dev = dev;
286 }
287
288 list_add_tail(&entry->list, &qcb->qos_list[index]);
289 extract_qos_list(nic, &send_list);
290 spin_unlock_irqrestore(&qcb->qos_lock, flags);
291 send_qos_list(nic, &send_list);
292 goto out;
293 }
294 spin_unlock_irqrestore(&qcb->qos_lock, flags);
295 if (entry)
296 free_qos_entry(entry);
297 }
298
299 ret = gdm_wimax_send_tx(skb, dev);
300 out:
301 return ret;
302 }
303
get_csr(struct qos_cb_s * qcb,u32 sfid,int mode)304 static int get_csr(struct qos_cb_s *qcb, u32 sfid, int mode)
305 {
306 int i;
307
308 for (i = 0; i < qcb->qos_list_cnt; i++) {
309 if (qcb->csr[i].sfid == sfid)
310 return i;
311 }
312
313 if (mode) {
314 for (i = 0; i < QOS_MAX; i++) {
315 if (!qcb->csr[i].enabled) {
316 qcb->csr[i].enabled = true;
317 qcb->qos_list_cnt++;
318 return i;
319 }
320 }
321 }
322 return -1;
323 }
324
325 #define QOS_CHANGE_DEL 0xFC
326 #define QOS_ADD 0xFD
327 #define QOS_REPORT 0xFE
328
gdm_recv_qos_hci_packet(void * nic_ptr,u8 * buf,int size)329 void gdm_recv_qos_hci_packet(void *nic_ptr, u8 *buf, int size)
330 {
331 struct nic *nic = nic_ptr;
332 int i, index, pos;
333 u32 sfid;
334 u8 sub_cmd_evt;
335 struct qos_cb_s *qcb = &nic->qos;
336 struct qos_entry_s *entry, *n;
337 struct list_head send_list;
338 struct list_head free_list;
339 unsigned long flags;
340
341 sub_cmd_evt = (u8)buf[4];
342
343 if (sub_cmd_evt == QOS_REPORT) {
344 spin_lock_irqsave(&qcb->qos_lock, flags);
345 for (i = 0; i < qcb->qos_list_cnt; i++) {
346 sfid = ((buf[(i*5)+6]<<24)&0xff000000);
347 sfid += ((buf[(i*5)+7]<<16)&0xff0000);
348 sfid += ((buf[(i*5)+8]<<8)&0xff00);
349 sfid += (buf[(i*5)+9]);
350 index = get_csr(qcb, sfid, 0);
351 if (index == -1) {
352 spin_unlock_irqrestore(&qcb->qos_lock, flags);
353 netdev_err(nic->netdev, "QoS ERROR: No SF\n");
354 return;
355 }
356 qcb->csr[index].qos_buf_count = buf[(i*5)+10];
357 }
358
359 extract_qos_list(nic, &send_list);
360 spin_unlock_irqrestore(&qcb->qos_lock, flags);
361 send_qos_list(nic, &send_list);
362 return;
363 }
364
365 /* sub_cmd_evt == QOS_ADD || sub_cmd_evt == QOS_CHANG_DEL */
366 pos = 6;
367 sfid = ((buf[pos++]<<24)&0xff000000);
368 sfid += ((buf[pos++]<<16)&0xff0000);
369 sfid += ((buf[pos++]<<8)&0xff00);
370 sfid += (buf[pos++]);
371
372 index = get_csr(qcb, sfid, 1);
373 if (index == -1) {
374 netdev_err(nic->netdev,
375 "QoS ERROR: csr Update Error / Wrong index (%d)\n",
376 index);
377 return;
378 }
379
380 if (sub_cmd_evt == QOS_ADD) {
381 netdev_dbg(nic->netdev, "QOS_ADD SFID = 0x%x, index=%d\n",
382 sfid, index);
383
384 spin_lock_irqsave(&qcb->qos_lock, flags);
385 qcb->csr[index].sfid = sfid;
386 qcb->csr[index].classifier_rule_en = ((buf[pos++]<<8)&0xff00);
387 qcb->csr[index].classifier_rule_en += buf[pos++];
388 if (qcb->csr[index].classifier_rule_en == 0)
389 qcb->qos_null_idx = index;
390 qcb->csr[index].ip2s_mask = buf[pos++];
391 qcb->csr[index].ip2s_lo = buf[pos++];
392 qcb->csr[index].ip2s_hi = buf[pos++];
393 qcb->csr[index].protocol = buf[pos++];
394 qcb->csr[index].ipsrc_addrmask[0] = buf[pos++];
395 qcb->csr[index].ipsrc_addrmask[1] = buf[pos++];
396 qcb->csr[index].ipsrc_addrmask[2] = buf[pos++];
397 qcb->csr[index].ipsrc_addrmask[3] = buf[pos++];
398 qcb->csr[index].ipsrc_addr[0] = buf[pos++];
399 qcb->csr[index].ipsrc_addr[1] = buf[pos++];
400 qcb->csr[index].ipsrc_addr[2] = buf[pos++];
401 qcb->csr[index].ipsrc_addr[3] = buf[pos++];
402 qcb->csr[index].ipdst_addrmask[0] = buf[pos++];
403 qcb->csr[index].ipdst_addrmask[1] = buf[pos++];
404 qcb->csr[index].ipdst_addrmask[2] = buf[pos++];
405 qcb->csr[index].ipdst_addrmask[3] = buf[pos++];
406 qcb->csr[index].ipdst_addr[0] = buf[pos++];
407 qcb->csr[index].ipdst_addr[1] = buf[pos++];
408 qcb->csr[index].ipdst_addr[2] = buf[pos++];
409 qcb->csr[index].ipdst_addr[3] = buf[pos++];
410 qcb->csr[index].srcport_lo = ((buf[pos++]<<8)&0xff00);
411 qcb->csr[index].srcport_lo += buf[pos++];
412 qcb->csr[index].srcport_hi = ((buf[pos++]<<8)&0xff00);
413 qcb->csr[index].srcport_hi += buf[pos++];
414 qcb->csr[index].dstport_lo = ((buf[pos++]<<8)&0xff00);
415 qcb->csr[index].dstport_lo += buf[pos++];
416 qcb->csr[index].dstport_hi = ((buf[pos++]<<8)&0xff00);
417 qcb->csr[index].dstport_hi += buf[pos++];
418
419 qcb->qos_limit_size = 254/qcb->qos_list_cnt;
420 spin_unlock_irqrestore(&qcb->qos_lock, flags);
421 } else if (sub_cmd_evt == QOS_CHANGE_DEL) {
422 netdev_dbg(nic->netdev, "QOS_CHANGE_DEL SFID = 0x%x, index=%d\n",
423 sfid, index);
424
425 INIT_LIST_HEAD(&free_list);
426
427 spin_lock_irqsave(&qcb->qos_lock, flags);
428 qcb->csr[index].enabled = false;
429 qcb->qos_list_cnt--;
430 qcb->qos_limit_size = 254/qcb->qos_list_cnt;
431
432 list_for_each_entry_safe(entry, n, &qcb->qos_list[index],
433 list) {
434 list_move_tail(&entry->list, &free_list);
435 }
436 spin_unlock_irqrestore(&qcb->qos_lock, flags);
437 free_qos_entry_list(&free_list);
438 }
439 }
440