xref: /freebsd/sys/dev/iwm/if_iwm_power.c (revision 8554754c7bbe3cda171378ad6305bbe8a1a94cb6)
1 /*	$OpenBSD: if_iwm.c,v 1.39 2015/03/23 00:35:19 jsg Exp $	*/
2 
3 /*
4  * Copyright (c) 2014 genua mbh <info@genua.de>
5  * Copyright (c) 2014 Fixup Software Ltd.
6  *
7  * Permission to use, copy, modify, and distribute this software for any
8  * purpose with or without fee is hereby granted, provided that the above
9  * copyright notice and this permission notice appear in all copies.
10  *
11  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18  */
19 
20 /*-
21  * Based on BSD-licensed source modules in the Linux iwlwifi driver,
22  * which were used as the reference documentation for this implementation.
23  *
24  * Driver version we are currently based off of is
25  * Linux 3.14.3 (tag id a2df521e42b1d9a23f620ac79dbfe8655a8391dd)
26  *
27  ***********************************************************************
28  *
29  * This file is provided under a dual BSD/GPLv2 license.  When using or
30  * redistributing this file, you may do so under either license.
31  *
32  * GPL LICENSE SUMMARY
33  *
34  * Copyright(c) 2007 - 2013 Intel Corporation. All rights reserved.
35  *
36  * This program is free software; you can redistribute it and/or modify
37  * it under the terms of version 2 of the GNU General Public License as
38  * published by the Free Software Foundation.
39  *
40  * This program is distributed in the hope that it will be useful, but
41  * WITHOUT ANY WARRANTY; without even the implied warranty of
42  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
43  * General Public License for more details.
44  *
45  * You should have received a copy of the GNU General Public License
46  * along with this program; if not, write to the Free Software
47  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
48  * USA
49  *
50  * The full GNU General Public License is included in this distribution
51  * in the file called COPYING.
52  *
53  * Contact Information:
54  *  Intel Linux Wireless <ilw@linux.intel.com>
55  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
56  *
57  *
58  * BSD LICENSE
59  *
60  * Copyright(c) 2005 - 2013 Intel Corporation. All rights reserved.
61  * All rights reserved.
62  *
63  * Redistribution and use in source and binary forms, with or without
64  * modification, are permitted provided that the following conditions
65  * are met:
66  *
67  *  * Redistributions of source code must retain the above copyright
68  *    notice, this list of conditions and the following disclaimer.
69  *  * Redistributions in binary form must reproduce the above copyright
70  *    notice, this list of conditions and the following disclaimer in
71  *    the documentation and/or other materials provided with the
72  *    distribution.
73  *  * Neither the name Intel Corporation nor the names of its
74  *    contributors may be used to endorse or promote products derived
75  *    from this software without specific prior written permission.
76  *
77  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
78  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
79  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
80  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
81  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
82  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
83  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
84  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
85  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
86  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
87  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
88  */
89 #include <sys/cdefs.h>
90 __FBSDID("$FreeBSD$");
91 
92 #include "opt_wlan.h"
93 
94 #include <sys/param.h>
95 #include <sys/bus.h>
96 #include <sys/conf.h>
97 #include <sys/endian.h>
98 #include <sys/firmware.h>
99 #include <sys/kernel.h>
100 #include <sys/malloc.h>
101 #include <sys/mbuf.h>
102 #include <sys/mutex.h>
103 #include <sys/module.h>
104 #include <sys/proc.h>
105 #include <sys/rman.h>
106 #include <sys/socket.h>
107 #include <sys/sockio.h>
108 #include <sys/sysctl.h>
109 #include <sys/linker.h>
110 
111 #include <machine/bus.h>
112 #include <machine/endian.h>
113 #include <machine/resource.h>
114 
115 #include <dev/pci/pcivar.h>
116 #include <dev/pci/pcireg.h>
117 
118 #include <net/bpf.h>
119 
120 #include <net/if.h>
121 #include <net/if_var.h>
122 #include <net/if_arp.h>
123 #include <net/if_dl.h>
124 #include <net/if_media.h>
125 #include <net/if_types.h>
126 
127 #include <netinet/in.h>
128 #include <netinet/in_systm.h>
129 #include <netinet/if_ether.h>
130 #include <netinet/ip.h>
131 
132 #include <net80211/ieee80211_var.h>
133 #include <net80211/ieee80211_regdomain.h>
134 #include <net80211/ieee80211_ratectl.h>
135 #include <net80211/ieee80211_radiotap.h>
136 
137 #include <dev/iwm/if_iwmreg.h>
138 #include <dev/iwm/if_iwmvar.h>
139 #include <dev/iwm/if_iwm_debug.h>
140 #include <dev/iwm/if_iwm_util.h>
141 #include <dev/iwm/if_iwm_power.h>
142 
143 /*
144  * BEGIN mvm/power.c
145  */
146 
147 #define IWM_POWER_KEEP_ALIVE_PERIOD_SEC    25
148 
149 static int
150 iwm_mvm_beacon_filter_send_cmd(struct iwm_softc *sc,
151 	struct iwm_beacon_filter_cmd *cmd)
152 {
153 	int ret;
154 
155 	ret = iwm_mvm_send_cmd_pdu(sc, IWM_REPLY_BEACON_FILTERING_CMD,
156 	    IWM_CMD_SYNC, sizeof(struct iwm_beacon_filter_cmd), cmd);
157 
158 	if (!ret) {
159 		IWM_DPRINTF(sc, IWM_DEBUG_PWRSAVE | IWM_DEBUG_CMD,
160 		    "ba_enable_beacon_abort is: %d\n",
161 		    le32toh(cmd->ba_enable_beacon_abort));
162 		IWM_DPRINTF(sc, IWM_DEBUG_PWRSAVE | IWM_DEBUG_CMD,
163 		    "ba_escape_timer is: %d\n",
164 		    le32toh(cmd->ba_escape_timer));
165 		IWM_DPRINTF(sc, IWM_DEBUG_PWRSAVE | IWM_DEBUG_CMD,
166 		    "bf_debug_flag is: %d\n",
167 		    le32toh(cmd->bf_debug_flag));
168 		IWM_DPRINTF(sc, IWM_DEBUG_PWRSAVE | IWM_DEBUG_CMD,
169 		    "bf_enable_beacon_filter is: %d\n",
170 		    le32toh(cmd->bf_enable_beacon_filter));
171 		IWM_DPRINTF(sc, IWM_DEBUG_PWRSAVE | IWM_DEBUG_CMD,
172 		    "bf_energy_delta is: %d\n",
173 		    le32toh(cmd->bf_energy_delta));
174 		IWM_DPRINTF(sc, IWM_DEBUG_PWRSAVE | IWM_DEBUG_CMD,
175 		    "bf_escape_timer is: %d\n",
176 		    le32toh(cmd->bf_escape_timer));
177 		IWM_DPRINTF(sc, IWM_DEBUG_PWRSAVE | IWM_DEBUG_CMD,
178 		    "bf_roaming_energy_delta is: %d\n",
179 		    le32toh(cmd->bf_roaming_energy_delta));
180 		IWM_DPRINTF(sc, IWM_DEBUG_PWRSAVE | IWM_DEBUG_CMD,
181 		    "bf_roaming_state is: %d\n",
182 		    le32toh(cmd->bf_roaming_state));
183 		IWM_DPRINTF(sc, IWM_DEBUG_PWRSAVE | IWM_DEBUG_CMD,
184 		    "bf_temp_threshold is: %d\n",
185 		    le32toh(cmd->bf_temp_threshold));
186 		IWM_DPRINTF(sc, IWM_DEBUG_PWRSAVE | IWM_DEBUG_CMD,
187 		    "bf_temp_fast_filter is: %d\n",
188 		    le32toh(cmd->bf_temp_fast_filter));
189 		IWM_DPRINTF(sc, IWM_DEBUG_PWRSAVE | IWM_DEBUG_CMD,
190 		    "bf_temp_slow_filter is: %d\n",
191 		    le32toh(cmd->bf_temp_slow_filter));
192 	}
193 	return ret;
194 }
195 
196 static void
197 iwm_mvm_beacon_filter_set_cqm_params(struct iwm_softc *sc,
198 	struct iwm_node *in, struct iwm_beacon_filter_cmd *cmd)
199 {
200 	cmd->ba_enable_beacon_abort = htole32(sc->sc_bf.ba_enabled);
201 }
202 
203 static int
204 iwm_mvm_update_beacon_abort(struct iwm_softc *sc, struct iwm_node *in,
205 	int enable)
206 {
207 	struct iwm_beacon_filter_cmd cmd = {
208 		IWM_BF_CMD_CONFIG_DEFAULTS,
209 		.bf_enable_beacon_filter = htole32(1),
210 		.ba_enable_beacon_abort = htole32(enable),
211 	};
212 
213 	if (!sc->sc_bf.bf_enabled)
214 		return 0;
215 
216 	sc->sc_bf.ba_enabled = enable;
217 	iwm_mvm_beacon_filter_set_cqm_params(sc, in, &cmd);
218 	return iwm_mvm_beacon_filter_send_cmd(sc, &cmd);
219 }
220 
221 static void
222 iwm_mvm_power_log(struct iwm_softc *sc, struct iwm_mac_power_cmd *cmd)
223 {
224 	IWM_DPRINTF(sc, IWM_DEBUG_PWRSAVE | IWM_DEBUG_CMD,
225 	    "Sending power table command on mac id 0x%X for "
226 	    "power level %d, flags = 0x%X\n",
227 	    cmd->id_and_color, IWM_POWER_SCHEME_CAM, le16toh(cmd->flags));
228 	IWM_DPRINTF(sc, IWM_DEBUG_PWRSAVE | IWM_DEBUG_CMD,
229 	    "Keep alive = %u sec\n", le16toh(cmd->keep_alive_seconds));
230 
231 	if (!(cmd->flags & htole16(IWM_POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK))) {
232 		IWM_DPRINTF(sc, IWM_DEBUG_PWRSAVE | IWM_DEBUG_CMD,
233 		    "Disable power management\n");
234 		return;
235 	}
236 }
237 
238 static void
239 iwm_mvm_power_build_cmd(struct iwm_softc *sc, struct iwm_node *in,
240 	struct iwm_mac_power_cmd *cmd)
241 {
242 	struct ieee80211_node *ni = &in->in_ni;
243 	int dtimper, dtimper_msec;
244 	int keep_alive;
245 	struct ieee80211com *ic = &sc->sc_ic;
246 	struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
247 
248 	cmd->id_and_color = htole32(IWM_FW_CMD_ID_AND_COLOR(IWM_DEFAULT_MACID,
249 	    IWM_DEFAULT_COLOR));
250 	dtimper = vap->iv_dtim_period ?: 1;
251 
252 	/*
253 	 * Regardless of power management state the driver must set
254 	 * keep alive period. FW will use it for sending keep alive NDPs
255 	 * immediately after association. Check that keep alive period
256 	 * is at least 3 * DTIM
257 	 */
258 	dtimper_msec = dtimper * ni->ni_intval;
259 	keep_alive
260 	    = MAX(3 * dtimper_msec, 1000 * IWM_POWER_KEEP_ALIVE_PERIOD_SEC);
261 	keep_alive = roundup(keep_alive, 1000) / 1000;
262 	cmd->keep_alive_seconds = htole16(keep_alive);
263 }
264 
265 int
266 iwm_mvm_power_mac_update_mode(struct iwm_softc *sc, struct iwm_node *in)
267 {
268 	int ret;
269 	int ba_enable;
270 	struct iwm_mac_power_cmd cmd;
271 
272 	memset(&cmd, 0, sizeof(cmd));
273 
274 	iwm_mvm_power_build_cmd(sc, in, &cmd);
275 	iwm_mvm_power_log(sc, &cmd);
276 
277 	if ((ret = iwm_mvm_send_cmd_pdu(sc, IWM_MAC_PM_POWER_TABLE,
278 	    IWM_CMD_SYNC, sizeof(cmd), &cmd)) != 0)
279 		return ret;
280 
281 	ba_enable = !!(cmd.flags &
282 	    htole16(IWM_POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK));
283 	return iwm_mvm_update_beacon_abort(sc, in, ba_enable);
284 }
285 
286 int
287 iwm_mvm_power_update_device(struct iwm_softc *sc)
288 {
289 	struct iwm_device_power_cmd cmd = {
290 		.flags = htole16(IWM_DEVICE_POWER_FLAGS_POWER_SAVE_ENA_MSK),
291 	};
292 
293 	cmd.flags |= htole16(IWM_DEVICE_POWER_FLAGS_CAM_MSK);
294 	IWM_DPRINTF(sc, IWM_DEBUG_PWRSAVE | IWM_DEBUG_CMD,
295 	    "Sending device power command with flags = 0x%X\n", cmd.flags);
296 
297 	return iwm_mvm_send_cmd_pdu(sc,
298 	    IWM_POWER_TABLE_CMD, IWM_CMD_SYNC, sizeof(cmd), &cmd);
299 }
300 
301 int
302 iwm_mvm_enable_beacon_filter(struct iwm_softc *sc, struct iwm_node *in)
303 {
304 	struct iwm_beacon_filter_cmd cmd = {
305 		IWM_BF_CMD_CONFIG_DEFAULTS,
306 		.bf_enable_beacon_filter = htole32(1),
307 	};
308 	int ret;
309 
310 	iwm_mvm_beacon_filter_set_cqm_params(sc, in, &cmd);
311 	ret = iwm_mvm_beacon_filter_send_cmd(sc, &cmd);
312 
313 	if (ret == 0)
314 		sc->sc_bf.bf_enabled = 1;
315 
316 	return ret;
317 }
318 
319 int
320 iwm_mvm_disable_beacon_filter(struct iwm_softc *sc)
321 {
322 	struct iwm_beacon_filter_cmd cmd = {};
323 	int ret;
324 
325 	ret = iwm_mvm_beacon_filter_send_cmd(sc, &cmd);
326 	if (ret == 0)
327 		sc->sc_bf.bf_enabled = 0;
328 
329 	return ret;
330 }
331