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