1 /*
2 * Copyright 2007, Intel Corporation
3 *
4 * This file is part of PowerTOP
5 *
6 * This program file is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; version 2 of the License.
9 *
10 * This program is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program in a file named COPYING; if not, write to the
17 * Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor,
19 * Boston, MA 02110-1301 USA
20 *
21 * Authors:
22 * Arjan van de Ven <arjan@linux.intel.com>
23 */
24
25 #include <unistd.h>
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <string.h>
29 #include <stdint.h>
30 #include <sys/types.h>
31 #include <dirent.h>
32 #include <linux/types.h>
33 #include <net/if.h>
34 #include <linux/sockios.h>
35 #include <sys/ioctl.h>
36
37 /* work around a bug in debian -- it exposes kernel internal types to userspace */
38 #define u64 __u64
39 #define u32 __u32
40 #define u16 __u16
41 #define u8 __u8
42 #include <linux/ethtool.h>
43 #undef u64
44 #undef u32
45 #undef u16
46 #undef u8
47
48
49
50 #include "powertop.h"
51
52
53 static char wireless_nic[32];
54 static char rfkill_path[PATH_MAX];
55 static char powersave_path[PATH_MAX];
56
rfkill_enabled(void)57 static int rfkill_enabled(void)
58 {
59 FILE *file;
60 char val;
61 if (strlen(rfkill_path)<2)
62 return 0;
63 if (access(rfkill_path, W_OK))
64 return 0;
65
66 file = fopen(rfkill_path, "r");
67 if (!file)
68 return 0;
69 val = fgetc(file);
70 fclose(file);
71 if (val != '0') /* already rfkill'd */
72 return 1;
73 return 0;
74 }
75
check_unused_wiresless_up(void)76 int check_unused_wiresless_up(void)
77 {
78 FILE *file;
79 char val;
80 char line[1024];
81 if (strlen(rfkill_path)<2)
82 return 0;
83 if (access(rfkill_path, W_OK))
84 return 0;
85
86 file = fopen(rfkill_path, "r");
87 if (!file)
88 return 0;
89 val = fgetc(file);
90 fclose(file);
91 if (val != '0') /* already rfkill'd */
92 return -1;
93
94 sprintf(line,"iwconfig %s 2> /dev/null", wireless_nic);
95 file = popen(line, "r");
96 if (!file)
97 return 0;
98 while (!feof(file)) {
99 memset(line, 0, 1024);
100 if (fgets(line, 1023, file) == 0)
101 break;
102 if (strstr(line, "Mode:Managed") && strstr(line,"Access Point: Not-Associated")) {
103 pclose(file);
104 return 1;
105 }
106 }
107 pclose(file);
108 return 0;
109 }
110
111
need_wireless_suggest(char * iface)112 static int need_wireless_suggest(char *iface)
113 {
114 FILE *file;
115 char line[1024];
116 int ret = 0;
117
118 if (rfkill_enabled())
119 return 0;
120
121 sprintf(line, "/sbin/iwpriv %s get_power 2> /dev/null", iface);
122 file = popen(line, "r");
123 if (!file)
124 return 0;
125 while (!feof(file)) {
126 memset(line, 0, 1024);
127 if (fgets(line, 1023, file)==NULL)
128 break;
129 if (strstr(line, "Power save level: 6 (AC)")) {
130 ret = 1;
131 break;
132 }
133 }
134 pclose(file);
135 return ret;
136 }
137
138
need_wireless_suggest_new(void)139 static int need_wireless_suggest_new(void)
140 {
141 FILE *file;
142 char val;
143 if (strlen(powersave_path)<2)
144 return 0;
145 if (access(powersave_path, W_OK))
146 return 0;
147
148 if (rfkill_enabled())
149 return 0;
150
151 file = fopen(powersave_path, "r");
152 if (!file)
153 return 0;
154 val = fgetc(file);
155 fclose(file);
156 if (val <= '5' && val >= '0') /* already in powersave */
157 return 0;
158
159 return 1;
160 }
161
find_4965(void)162 void find_4965(void)
163 {
164 static int tried_4965 = 0;
165 DIR *dir;
166 struct dirent *dirent;
167 char pathname[PATH_MAX];
168
169 if (tried_4965++)
170 return;
171
172 dir = opendir("/sys/bus/pci/drivers/iwl4965");
173 while (dir && (dirent = readdir(dir))) {
174 if (dirent->d_name[0]=='.')
175 continue;
176 sprintf(pathname, "/sys/bus/pci/drivers/iwl4965/%s/power_level", dirent->d_name);
177 if (!access(pathname, W_OK))
178 strcpy(powersave_path, pathname);
179 }
180 if (dir)
181 closedir(dir);
182 dir = opendir("/sys/bus/pci/drivers/iwl3945");
183 if (!dir)
184 return;
185 while ((dirent = readdir(dir))) {
186 if (dirent->d_name[0]=='.')
187 continue;
188 sprintf(pathname, "/sys/bus/pci/drivers/iwl3945/%s/power_level", dirent->d_name);
189 if (!access(pathname, W_OK))
190 strcpy(powersave_path, pathname);
191 }
192
193 closedir(dir);
194
195 }
196
197
find_wireless_nic(void)198 void find_wireless_nic(void)
199 {
200 static int found = 0;
201 FILE *file;
202 int sock;
203 struct ifreq ifr;
204 struct ethtool_value ethtool;
205 struct ethtool_drvinfo driver;
206 int ifaceup = 0;
207 int ret;
208
209 if (found++)
210 return;
211
212 wireless_nic[0] = 0;
213 rfkill_path[0] = 0;
214 powersave_path[0] = 0;
215
216 strcpy(wireless_nic, "wlan0");
217
218 file = popen("/sbin/iwpriv -a 2> /dev/null", "r");
219 if (!file)
220 return;
221 while (!feof(file)) {
222 char line[1024];
223 memset(line, 0, 1024);
224 if (fgets(line, 1023, file)==NULL)
225 break;
226 if (strstr(line, "get_power:Power save level")) {
227 char *c;
228 c = strchr(line, ' ');
229 if (c) *c = 0;
230 strcpy(wireless_nic, line);
231 }
232 if (strstr(line, "wlan0:"))
233 strcpy(wireless_nic, "wlan0");
234 }
235 pclose(file);
236
237
238 if (strlen(wireless_nic)==0)
239 return;
240
241
242 memset(&ifr, 0, sizeof(struct ifreq));
243 memset(ðtool, 0, sizeof(struct ethtool_value));
244
245 sock = socket(AF_INET, SOCK_DGRAM, 0);
246 if (sock<0)
247 return;
248
249 strcpy(ifr.ifr_name, wireless_nic);
250
251 /* Check if the interface is up */
252 ret = ioctl(sock, SIOCGIFFLAGS, &ifr);
253 if (ret<0) {
254 close(sock);
255 return;
256 }
257
258 ifaceup = 0;
259 if (ifr.ifr_flags & (IFF_UP | IFF_RUNNING))
260 ifaceup = 1;
261
262 memset(&driver, 0, sizeof(driver));
263 driver.cmd = ETHTOOL_GDRVINFO;
264 ifr.ifr_data = (void*) &driver;
265 ret = ioctl(sock, SIOCETHTOOL, &ifr);
266
267 sprintf(rfkill_path,"/sys/bus/pci/devices/%s/rfkill/rfkill0/state", driver.bus_info);
268 sprintf(powersave_path,"/sys/bus/pci/devices/%s/power_level", driver.bus_info);
269 close(sock);
270 }
271
activate_wireless_suggestion(void)272 void activate_wireless_suggestion(void)
273 {
274 char line[1024];
275 sprintf(line, "/sbin/iwpriv %s set_power 5 2> /dev/null", wireless_nic);
276 system(line);
277 }
activate_wireless_suggestion_new(void)278 void activate_wireless_suggestion_new(void)
279 {
280 FILE *file;
281 file = fopen(powersave_path, "w");
282 if (!file)
283 return;
284 fprintf(file,"1\n");
285 fclose(file);
286 }
287
activate_rfkill_suggestion(void)288 void activate_rfkill_suggestion(void)
289 {
290 FILE *file;
291 file = fopen(rfkill_path, "w");
292 if (!file)
293 return;
294 fprintf(file,"1\n");
295 fclose(file);
296 }
suggest_wireless_powersave(void)297 void suggest_wireless_powersave(void)
298 {
299 char sug[1024];
300 int ret;
301
302 if (strlen(wireless_nic)==0)
303 find_wireless_nic();
304 find_4965();
305 ret = check_unused_wiresless_up();
306
307 if (ret >= 0 && need_wireless_suggest(wireless_nic)) {
308 sprintf(sug, _("Suggestion: Enable wireless power saving mode by executing the following command:\n "
309 " iwpriv %s set_power 5 \n"
310 "This will sacrifice network performance slightly to save power."), wireless_nic);
311 add_suggestion(sug, 20, 'W', _(" W - Enable wireless power saving "), activate_wireless_suggestion);
312 }
313 if (ret >= 0 && need_wireless_suggest_new()) {
314 sprintf(sug, _("Suggestion: Enable wireless power saving mode by executing the following command:\n "
315 " echo 5 > %s \n"
316 "This will sacrifice network performance slightly to save power."), powersave_path);
317 add_suggestion(sug, 20, 'W', _(" W - Enable wireless power saving "), activate_wireless_suggestion_new);
318 }
319 if (ret>0) {
320 sprintf(sug, _("Suggestion: Disable the unused WIFI radio by executing the following command:\n "
321 " echo 1 > %s \n"), rfkill_path);
322 add_suggestion(sug, 60, 'I', _(" I - disable WIFI Radio "), activate_rfkill_suggestion);
323
324 }
325 }
326