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
90 /*-
91 * Copyright (c) 2007-2010 Damien Bergamini <damien.bergamini@free.fr>
92 *
93 * Permission to use, copy, modify, and distribute this software for any
94 * purpose with or without fee is hereby granted, provided that the above
95 * copyright notice and this permission notice appear in all copies.
96 *
97 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
98 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
99 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
100 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
101 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
102 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
103 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
104 */
105 #include <sys/cdefs.h>
106 #include "opt_wlan.h"
107 #include "opt_iwm.h"
108
109 #include <sys/param.h>
110 #include <sys/bus.h>
111 #include <sys/conf.h>
112 #include <sys/endian.h>
113 #include <sys/firmware.h>
114 #include <sys/kernel.h>
115 #include <sys/malloc.h>
116 #include <sys/mbuf.h>
117 #include <sys/mutex.h>
118 #include <sys/module.h>
119 #include <sys/proc.h>
120 #include <sys/rman.h>
121 #include <sys/socket.h>
122 #include <sys/sockio.h>
123 #include <sys/sysctl.h>
124 #include <sys/linker.h>
125
126 #include <machine/bus.h>
127 #include <machine/endian.h>
128 #include <machine/resource.h>
129
130 #include <dev/pci/pcivar.h>
131 #include <dev/pci/pcireg.h>
132
133 #include <net/bpf.h>
134
135 #include <net/if.h>
136 #include <net/if_var.h>
137 #include <net/if_arp.h>
138 #include <net/if_dl.h>
139 #include <net/if_media.h>
140 #include <net/if_types.h>
141
142 #include <netinet/in.h>
143 #include <netinet/in_systm.h>
144 #include <netinet/if_ether.h>
145 #include <netinet/ip.h>
146
147 #include <net80211/ieee80211_var.h>
148 #include <net80211/ieee80211_regdomain.h>
149 #include <net80211/ieee80211_ratectl.h>
150 #include <net80211/ieee80211_radiotap.h>
151
152 #include <dev/iwm/if_iwmreg.h>
153 #include <dev/iwm/if_iwmvar.h>
154 #include <dev/iwm/if_iwm_debug.h>
155 #include <dev/iwm/if_iwm_util.h>
156 #include <dev/iwm/if_iwm_phy_ctxt.h>
157
158 /*
159 * BEGIN iwlwifi/mvm/phy-ctxt.c
160 */
161
162 /*
163 * Construct the generic fields of the PHY context command
164 */
165 static void
iwm_phy_ctxt_cmd_hdr(struct iwm_softc * sc,struct iwm_phy_ctxt * ctxt,struct iwm_phy_context_cmd * cmd,uint32_t action,uint32_t apply_time)166 iwm_phy_ctxt_cmd_hdr(struct iwm_softc *sc, struct iwm_phy_ctxt *ctxt,
167 struct iwm_phy_context_cmd *cmd, uint32_t action, uint32_t apply_time)
168 {
169 memset(cmd, 0, sizeof(struct iwm_phy_context_cmd));
170
171 IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_CMD,
172 "%s: id=%d, colour=%d, action=%d, apply_time=%d\n",
173 __func__,
174 ctxt->id,
175 ctxt->color,
176 action,
177 apply_time);
178
179 cmd->id_and_color = htole32(IWM_FW_CMD_ID_AND_COLOR(ctxt->id,
180 ctxt->color));
181 cmd->action = htole32(action);
182 cmd->apply_time = htole32(apply_time);
183 }
184
185 /*
186 * Add the phy configuration to the PHY context command
187 */
188 static void
iwm_phy_ctxt_cmd_data(struct iwm_softc * sc,struct iwm_phy_context_cmd * cmd,struct ieee80211_channel * chan,uint8_t chains_static,uint8_t chains_dynamic)189 iwm_phy_ctxt_cmd_data(struct iwm_softc *sc,
190 struct iwm_phy_context_cmd *cmd, struct ieee80211_channel *chan,
191 uint8_t chains_static, uint8_t chains_dynamic)
192 {
193 struct ieee80211com *ic = &sc->sc_ic;
194 uint8_t active_cnt, idle_cnt;
195
196 IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_CMD,
197 "%s: 2ghz=%d, channel=%d, chains static=0x%x, dynamic=0x%x, "
198 "rx_ant=0x%x, tx_ant=0x%x\n",
199 __func__,
200 !! IEEE80211_IS_CHAN_2GHZ(chan),
201 ieee80211_chan2ieee(ic, chan),
202 chains_static,
203 chains_dynamic,
204 iwm_get_valid_rx_ant(sc),
205 iwm_get_valid_tx_ant(sc));
206
207
208 cmd->ci.band = IEEE80211_IS_CHAN_2GHZ(chan) ?
209 IWM_PHY_BAND_24 : IWM_PHY_BAND_5;
210
211 cmd->ci.channel = ieee80211_chan2ieee(ic, chan);
212 cmd->ci.width = IWM_PHY_VHT_CHANNEL_MODE20;
213 cmd->ci.ctrl_pos = IWM_PHY_VHT_CTRL_POS_1_BELOW;
214
215 /* Set rx the chains */
216 idle_cnt = chains_static;
217 active_cnt = chains_dynamic;
218
219 /* In scenarios where we only ever use a single-stream rates,
220 * i.e. legacy 11b/g/a associations, single-stream APs or even
221 * static SMPS, enable both chains to get diversity, improving
222 * the case where we're far enough from the AP that attenuation
223 * between the two antennas is sufficiently different to impact
224 * performance.
225 */
226 if (active_cnt == 1 && iwm_rx_diversity_allowed(sc)) {
227 idle_cnt = 2;
228 active_cnt = 2;
229 }
230
231 cmd->rxchain_info = htole32(iwm_get_valid_rx_ant(sc) <<
232 IWM_PHY_RX_CHAIN_VALID_POS);
233 cmd->rxchain_info |= htole32(idle_cnt << IWM_PHY_RX_CHAIN_CNT_POS);
234 cmd->rxchain_info |= htole32(active_cnt <<
235 IWM_PHY_RX_CHAIN_MIMO_CNT_POS);
236
237 cmd->txchain_info = htole32(iwm_get_valid_tx_ant(sc));
238 }
239
240 /*
241 * Send a command
242 * only if something in the configuration changed: in case that this is the
243 * first time that the phy configuration is applied or in case that the phy
244 * configuration changed from the previous apply.
245 */
246 static int
iwm_phy_ctxt_apply(struct iwm_softc * sc,struct iwm_phy_ctxt * ctxt,uint8_t chains_static,uint8_t chains_dynamic,uint32_t action,uint32_t apply_time)247 iwm_phy_ctxt_apply(struct iwm_softc *sc,
248 struct iwm_phy_ctxt *ctxt,
249 uint8_t chains_static, uint8_t chains_dynamic,
250 uint32_t action, uint32_t apply_time)
251 {
252 struct iwm_phy_context_cmd cmd;
253 int ret;
254
255 IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_CMD,
256 "%s: called; channel=%p\n",
257 __func__,
258 ctxt->channel);
259
260 /* Set the command header fields */
261 iwm_phy_ctxt_cmd_hdr(sc, ctxt, &cmd, action, apply_time);
262
263 /* Set the command data */
264 iwm_phy_ctxt_cmd_data(sc, &cmd, ctxt->channel,
265 chains_static, chains_dynamic);
266
267 ret = iwm_send_cmd_pdu(sc, IWM_PHY_CONTEXT_CMD, IWM_CMD_SYNC,
268 sizeof(struct iwm_phy_context_cmd), &cmd);
269 if (ret) {
270 device_printf(sc->sc_dev,
271 "PHY ctxt cmd error. ret=%d\n", ret);
272 }
273 return ret;
274 }
275
276 /*
277 * Send a command to add a PHY context based on the current HW configuration.
278 */
279 int
iwm_phy_ctxt_add(struct iwm_softc * sc,struct iwm_phy_ctxt * ctxt,struct ieee80211_channel * chan,uint8_t chains_static,uint8_t chains_dynamic)280 iwm_phy_ctxt_add(struct iwm_softc *sc, struct iwm_phy_ctxt *ctxt,
281 struct ieee80211_channel *chan,
282 uint8_t chains_static, uint8_t chains_dynamic)
283 {
284 ctxt->channel = chan;
285
286 IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_CMD,
287 "%s: called; channel=%d\n",
288 __func__,
289 ieee80211_chan2ieee(&sc->sc_ic, chan));
290
291 return iwm_phy_ctxt_apply(sc, ctxt,
292 chains_static, chains_dynamic, IWM_FW_CTXT_ACTION_ADD, 0);
293 }
294
295 /*
296 * Send a command to modify the PHY context based on the current HW
297 * configuration. Note that the function does not check that the configuration
298 * changed.
299 */
300 int
iwm_phy_ctxt_changed(struct iwm_softc * sc,struct iwm_phy_ctxt * ctxt,struct ieee80211_channel * chan,uint8_t chains_static,uint8_t chains_dynamic)301 iwm_phy_ctxt_changed(struct iwm_softc *sc,
302 struct iwm_phy_ctxt *ctxt, struct ieee80211_channel *chan,
303 uint8_t chains_static, uint8_t chains_dynamic)
304 {
305 ctxt->channel = chan;
306
307 IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_CMD,
308 "%s: called; channel=%d\n",
309 __func__,
310 ieee80211_chan2ieee(&sc->sc_ic, chan));
311
312 return iwm_phy_ctxt_apply(sc, ctxt,
313 chains_static, chains_dynamic, IWM_FW_CTXT_ACTION_MODIFY, 0);
314 }
315
316 /*
317 * END iwlwifi/mvm/phy-ctxt.c
318 */
319