1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright(c) 2007 - 2012 Realtek Corporation. */
3
4 #define _OSDEP_SERVICE_C_
5
6 #include "../include/osdep_service.h"
7 #include "../include/drv_types.h"
8 #include "../include/recv_osdep.h"
9 #include "../include/rtw_ioctl_set.h"
10
11 /*
12 * Translate the OS dependent @param error_code to OS independent RTW_STATUS_CODE
13 * @return: one of RTW_STATUS_CODE
14 */
RTW_STATUS_CODE(int error_code)15 inline int RTW_STATUS_CODE(int error_code)
16 {
17 if (error_code >= 0)
18 return _SUCCESS;
19 return _FAIL;
20 }
21
rtw_atoi(u8 * s)22 u32 rtw_atoi(u8 *s)
23 {
24 int num = 0, flag = 0;
25 int i;
26 for (i = 0; i <= strlen(s); i++) {
27 if (s[i] >= '0' && s[i] <= '9')
28 num = num * 10 + s[i] - '0';
29 else if (s[0] == '-' && i == 0)
30 flag = 1;
31 else
32 break;
33 }
34 if (flag == 1)
35 num = num * -1;
36 return num;
37 }
38
rtw_malloc2d(int h,int w,int size)39 void *rtw_malloc2d(int h, int w, int size)
40 {
41 int j;
42
43 void **a = kzalloc(h * sizeof(void *) + h * w * size, GFP_KERNEL);
44 if (!a)
45 return NULL;
46
47 for (j = 0; j < h; j++)
48 a[j] = ((char *)(a + h)) + j * w * size;
49
50 return a;
51 }
52
53 /*
54 For the following list_xxx operations,
55 caller must guarantee the atomic context.
56 Otherwise, there will be racing condition.
57 */
58 /*
59 Caller must check if the list is empty before calling rtw_list_delete
60 */
61
_rtw_down_sema(struct semaphore * sema)62 u32 _rtw_down_sema(struct semaphore *sema)
63 {
64 if (down_interruptible(sema))
65 return _FAIL;
66 else
67 return _SUCCESS;
68 }
69
_rtw_mutex_init(struct mutex * pmutex)70 void _rtw_mutex_init(struct mutex *pmutex)
71 {
72 mutex_init(pmutex);
73 }
74
_rtw_mutex_free(struct mutex * pmutex)75 void _rtw_mutex_free(struct mutex *pmutex)
76 {
77 mutex_destroy(pmutex);
78 }
79
_rtw_init_queue(struct __queue * pqueue)80 void _rtw_init_queue(struct __queue *pqueue)
81 {
82 INIT_LIST_HEAD(&pqueue->queue);
83 spin_lock_init(&pqueue->lock);
84 }
85
rtw_systime_to_ms(u32 systime)86 inline u32 rtw_systime_to_ms(u32 systime)
87 {
88 return systime * 1000 / HZ;
89 }
90
rtw_ms_to_systime(u32 ms)91 inline u32 rtw_ms_to_systime(u32 ms)
92 {
93 return ms * HZ / 1000;
94 }
95
96 /* the input parameter start use the same unit as jiffies */
rtw_get_passing_time_ms(u32 start)97 inline s32 rtw_get_passing_time_ms(u32 start)
98 {
99 return rtw_systime_to_ms(jiffies - start);
100 }
101
rtw_usleep_os(int us)102 void rtw_usleep_os(int us)
103 {
104 if (1 < (us / 1000))
105 msleep(1);
106 else
107 msleep((us / 1000) + 1);
108 }
109
110 #define RTW_SUSPEND_LOCK_NAME "rtw_wifi"
111
112 static const struct device_type wlan_type = {
113 .name = "wlan",
114 };
115
rtw_alloc_etherdev_with_old_priv(int sizeof_priv,void * old_priv)116 struct net_device *rtw_alloc_etherdev_with_old_priv(int sizeof_priv,
117 void *old_priv)
118 {
119 struct net_device *pnetdev;
120 struct rtw_netdev_priv_indicator *pnpi;
121
122 pnetdev = alloc_etherdev_mq(sizeof(struct rtw_netdev_priv_indicator), 4);
123 if (!pnetdev)
124 goto RETURN;
125
126 pnetdev->dev.type = &wlan_type;
127 pnpi = netdev_priv(pnetdev);
128 pnpi->priv = old_priv;
129 pnpi->sizeof_priv = sizeof_priv;
130
131 RETURN:
132 return pnetdev;
133 }
134
rtw_alloc_etherdev(int sizeof_priv)135 struct net_device *rtw_alloc_etherdev(int sizeof_priv)
136 {
137 struct net_device *pnetdev;
138 struct rtw_netdev_priv_indicator *pnpi;
139
140 pnetdev = alloc_etherdev_mq(sizeof(struct rtw_netdev_priv_indicator), 4);
141 if (!pnetdev)
142 goto RETURN;
143
144 pnpi = netdev_priv(pnetdev);
145
146 pnpi->priv = vzalloc(sizeof_priv);
147 if (!pnpi->priv) {
148 free_netdev(pnetdev);
149 pnetdev = NULL;
150 goto RETURN;
151 }
152
153 pnpi->sizeof_priv = sizeof_priv;
154 RETURN:
155 return pnetdev;
156 }
157
rtw_free_netdev(struct net_device * netdev)158 void rtw_free_netdev(struct net_device *netdev)
159 {
160 struct rtw_netdev_priv_indicator *pnpi;
161
162 if (!netdev)
163 goto RETURN;
164
165 pnpi = netdev_priv(netdev);
166
167 if (!pnpi->priv)
168 goto RETURN;
169
170 vfree(pnpi->priv);
171 free_netdev(netdev);
172
173 RETURN:
174 return;
175 }
176
rtw_change_ifname(struct adapter * padapter,const char * ifname)177 int rtw_change_ifname(struct adapter *padapter, const char *ifname)
178 {
179 struct net_device *pnetdev;
180 struct net_device *cur_pnetdev;
181 struct rereg_nd_name_data *rereg_priv;
182 int ret;
183
184 if (!padapter)
185 goto error;
186
187 cur_pnetdev = padapter->pnetdev;
188 rereg_priv = &padapter->rereg_nd_name_priv;
189
190 /* free the old_pnetdev */
191 if (rereg_priv->old_pnetdev) {
192 free_netdev(rereg_priv->old_pnetdev);
193 rereg_priv->old_pnetdev = NULL;
194 }
195
196 if (!rtnl_is_locked())
197 unregister_netdev(cur_pnetdev);
198 else
199 unregister_netdevice(cur_pnetdev);
200
201 rtw_proc_remove_one(cur_pnetdev);
202
203 rereg_priv->old_pnetdev = cur_pnetdev;
204
205 pnetdev = rtw_init_netdev(padapter);
206 if (!pnetdev) {
207 ret = -1;
208 goto error;
209 }
210
211 SET_NETDEV_DEV(pnetdev, dvobj_to_dev(adapter_to_dvobj(padapter)));
212
213 rtw_init_netdev_name(pnetdev, ifname);
214
215 memcpy(pnetdev->dev_addr, padapter->eeprompriv.mac_addr, ETH_ALEN);
216
217 if (!rtnl_is_locked())
218 ret = register_netdev(pnetdev);
219 else
220 ret = register_netdevice(pnetdev);
221 if (ret != 0)
222 goto error;
223
224 rtw_proc_init_one(pnetdev);
225 return 0;
226 error:
227 return -1;
228 }
229
rtw_buf_update(u8 ** buf,u32 * buf_len,u8 * src,u32 src_len)230 void rtw_buf_update(u8 **buf, u32 *buf_len, u8 *src, u32 src_len)
231 {
232 u32 dup_len = 0;
233 u8 *ori = NULL;
234 u8 *dup = NULL;
235
236 if (!buf || !buf_len)
237 return;
238
239 if (!src || !src_len)
240 goto keep_ori;
241
242 /* duplicate src */
243 dup = kmalloc(src_len, GFP_ATOMIC);
244 if (dup) {
245 dup_len = src_len;
246 memcpy(dup, src, dup_len);
247 }
248
249 keep_ori:
250 ori = *buf;
251
252 /* replace buf with dup */
253 *buf_len = 0;
254 *buf = dup;
255 *buf_len = dup_len;
256
257 /* free ori */
258 kfree(ori);
259 }
260
261 /**
262 * rtw_cbuf_full - test if cbuf is full
263 * @cbuf: pointer of struct rtw_cbuf
264 *
265 * Returns: true if cbuf is full
266 */
rtw_cbuf_full(struct rtw_cbuf * cbuf)267 inline bool rtw_cbuf_full(struct rtw_cbuf *cbuf)
268 {
269 return (cbuf->write == cbuf->read - 1) ? true : false;
270 }
271
272 /**
273 * rtw_cbuf_empty - test if cbuf is empty
274 * @cbuf: pointer of struct rtw_cbuf
275 *
276 * Returns: true if cbuf is empty
277 */
rtw_cbuf_empty(struct rtw_cbuf * cbuf)278 inline bool rtw_cbuf_empty(struct rtw_cbuf *cbuf)
279 {
280 return (cbuf->write == cbuf->read) ? true : false;
281 }
282
283 /**
284 * rtw_cbuf_push - push a pointer into cbuf
285 * @cbuf: pointer of struct rtw_cbuf
286 * @buf: pointer to push in
287 *
288 * Lock free operation, be careful of the use scheme
289 * Returns: true push success
290 */
rtw_cbuf_push(struct rtw_cbuf * cbuf,void * buf)291 bool rtw_cbuf_push(struct rtw_cbuf *cbuf, void *buf)
292 {
293 if (rtw_cbuf_full(cbuf))
294 return _FAIL;
295
296 if (0)
297 DBG_88E("%s on %u\n", __func__, cbuf->write);
298 cbuf->bufs[cbuf->write] = buf;
299 cbuf->write = (cbuf->write + 1) % cbuf->size;
300
301 return _SUCCESS;
302 }
303
304 /**
305 * rtw_cbuf_pop - pop a pointer from cbuf
306 * @cbuf: pointer of struct rtw_cbuf
307 *
308 * Lock free operation, be careful of the use scheme
309 * Returns: pointer popped out
310 */
rtw_cbuf_pop(struct rtw_cbuf * cbuf)311 void *rtw_cbuf_pop(struct rtw_cbuf *cbuf)
312 {
313 void *buf;
314 if (rtw_cbuf_empty(cbuf))
315 return NULL;
316
317 if (0)
318 DBG_88E("%s on %u\n", __func__, cbuf->read);
319 buf = cbuf->bufs[cbuf->read];
320 cbuf->read = (cbuf->read + 1) % cbuf->size;
321
322 return buf;
323 }
324
325 /**
326 * rtw_cbuf_alloc - allocate a rtw_cbuf with given size and do initialization
327 * @size: size of pointer
328 *
329 * Returns: pointer of srtuct rtw_cbuf, NULL for allocation failure
330 */
rtw_cbuf_alloc(u32 size)331 struct rtw_cbuf *rtw_cbuf_alloc(u32 size)
332 {
333 struct rtw_cbuf *cbuf;
334
335 cbuf = kmalloc(sizeof(*cbuf) + sizeof(void *) * size, GFP_KERNEL);
336
337 if (cbuf) {
338 cbuf->write = 0;
339 cbuf->read = 0;
340 cbuf->size = size;
341 }
342 return cbuf;
343 }
344