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/param.h>
106 #include <sys/bus.h>
107 #include <sys/conf.h>
108 #include <sys/endian.h>
109 #include <sys/firmware.h>
110 #include <sys/kernel.h>
111 #include <sys/malloc.h>
112 #include <sys/mbuf.h>
113 #include <sys/rman.h>
114 #include <sys/sysctl.h>
115 #include <sys/linker.h>
116
117 #include <machine/endian.h>
118
119 #include <bus/pci/pcivar.h>
120 #include <bus/pci/pcireg.h>
121
122 #include <net/bpf.h>
123
124 #include <net/if.h>
125 #include <net/if_var.h>
126 #include <net/if_arp.h>
127 #include <net/if_dl.h>
128 #include <net/if_media.h>
129 #include <net/if_types.h>
130
131 #include <netinet/in.h>
132 #include <netinet/in_systm.h>
133 #include <netinet/if_ether.h>
134 #include <netinet/ip.h>
135
136 #include <netproto/802_11/ieee80211_var.h>
137 #include <netproto/802_11/ieee80211_regdomain.h>
138 #include <netproto/802_11/ieee80211_ratectl.h>
139 #include <netproto/802_11/ieee80211_radiotap.h>
140
141 #include "if_iwmreg.h"
142 #include "if_iwmvar.h"
143 #include "if_iwm_debug.h"
144 #include "if_iwm_util.h"
145 #include "if_iwm_phy_ctxt.h"
146
147 /*
148 * BEGIN iwlwifi/mvm/phy-ctxt.c
149 */
150
151 /*
152 * Construct the generic fields of the PHY context command
153 */
154 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)155 iwm_phy_ctxt_cmd_hdr(struct iwm_softc *sc, struct iwm_phy_ctxt *ctxt,
156 struct iwm_phy_context_cmd *cmd, uint32_t action, uint32_t apply_time)
157 {
158 memset(cmd, 0, sizeof(struct iwm_phy_context_cmd));
159
160 IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_CMD,
161 "%s: id=%d, colour=%d, action=%d, apply_time=%d\n",
162 __func__,
163 ctxt->id,
164 ctxt->color,
165 action,
166 apply_time);
167
168 cmd->id_and_color = htole32(IWM_FW_CMD_ID_AND_COLOR(ctxt->id,
169 ctxt->color));
170 cmd->action = htole32(action);
171 cmd->apply_time = htole32(apply_time);
172 }
173
174 /*
175 * Add the phy configuration to the PHY context command
176 */
177 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)178 iwm_phy_ctxt_cmd_data(struct iwm_softc *sc,
179 struct iwm_phy_context_cmd *cmd, struct ieee80211_channel *chan,
180 uint8_t chains_static, uint8_t chains_dynamic)
181 {
182 struct ieee80211com *ic = &sc->sc_ic;
183 uint8_t active_cnt, idle_cnt;
184
185 IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_CMD,
186 "%s: 2ghz=%d, channel=%d, chains static=0x%x, dynamic=0x%x, "
187 "rx_ant=0x%x, tx_ant=0x%x\n",
188 __func__,
189 !! IEEE80211_IS_CHAN_2GHZ(chan),
190 ieee80211_chan2ieee(ic, chan),
191 chains_static,
192 chains_dynamic,
193 iwm_get_valid_rx_ant(sc),
194 iwm_get_valid_tx_ant(sc));
195
196
197 cmd->ci.band = IEEE80211_IS_CHAN_2GHZ(chan) ?
198 IWM_PHY_BAND_24 : IWM_PHY_BAND_5;
199
200 cmd->ci.channel = ieee80211_chan2ieee(ic, chan);
201 cmd->ci.width = IWM_PHY_VHT_CHANNEL_MODE20;
202 cmd->ci.ctrl_pos = IWM_PHY_VHT_CTRL_POS_1_BELOW;
203
204 /* Set rx the chains */
205 idle_cnt = chains_static;
206 active_cnt = chains_dynamic;
207
208 /* In scenarios where we only ever use a single-stream rates,
209 * i.e. legacy 11b/g/a associations, single-stream APs or even
210 * static SMPS, enable both chains to get diversity, improving
211 * the case where we're far enough from the AP that attenuation
212 * between the two antennas is sufficiently different to impact
213 * performance.
214 */
215 if (active_cnt == 1 && iwm_rx_diversity_allowed(sc)) {
216 idle_cnt = 2;
217 active_cnt = 2;
218 }
219
220 cmd->rxchain_info = htole32(iwm_get_valid_rx_ant(sc) <<
221 IWM_PHY_RX_CHAIN_VALID_POS);
222 cmd->rxchain_info |= htole32(idle_cnt << IWM_PHY_RX_CHAIN_CNT_POS);
223 cmd->rxchain_info |= htole32(active_cnt <<
224 IWM_PHY_RX_CHAIN_MIMO_CNT_POS);
225
226 cmd->txchain_info = htole32(iwm_get_valid_tx_ant(sc));
227 }
228
229 /*
230 * Send a command
231 * only if something in the configuration changed: in case that this is the
232 * first time that the phy configuration is applied or in case that the phy
233 * configuration changed from the previous apply.
234 */
235 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)236 iwm_phy_ctxt_apply(struct iwm_softc *sc,
237 struct iwm_phy_ctxt *ctxt,
238 uint8_t chains_static, uint8_t chains_dynamic,
239 uint32_t action, uint32_t apply_time)
240 {
241 struct iwm_phy_context_cmd cmd;
242 int ret;
243
244 IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_CMD,
245 "%s: called; channel=%p\n",
246 __func__,
247 ctxt->channel);
248
249 /* Set the command header fields */
250 iwm_phy_ctxt_cmd_hdr(sc, ctxt, &cmd, action, apply_time);
251
252 /* Set the command data */
253 iwm_phy_ctxt_cmd_data(sc, &cmd, ctxt->channel,
254 chains_static, chains_dynamic);
255
256 ret = iwm_send_cmd_pdu(sc, IWM_PHY_CONTEXT_CMD, IWM_CMD_SYNC,
257 sizeof(struct iwm_phy_context_cmd), &cmd);
258 if (ret) {
259 device_printf(sc->sc_dev,
260 "PHY ctxt cmd error. ret=%d\n", ret);
261 }
262 return ret;
263 }
264
265 /*
266 * Send a command to add a PHY context based on the current HW configuration.
267 */
268 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)269 iwm_phy_ctxt_add(struct iwm_softc *sc, struct iwm_phy_ctxt *ctxt,
270 struct ieee80211_channel *chan,
271 uint8_t chains_static, uint8_t chains_dynamic)
272 {
273 ctxt->channel = chan;
274
275 IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_CMD,
276 "%s: called; channel=%d\n",
277 __func__,
278 ieee80211_chan2ieee(&sc->sc_ic, chan));
279
280 return iwm_phy_ctxt_apply(sc, ctxt,
281 chains_static, chains_dynamic, IWM_FW_CTXT_ACTION_ADD, 0);
282 }
283
284 /*
285 * Send a command to modify the PHY context based on the current HW
286 * configuration. Note that the function does not check that the configuration
287 * changed.
288 */
289 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)290 iwm_phy_ctxt_changed(struct iwm_softc *sc,
291 struct iwm_phy_ctxt *ctxt, struct ieee80211_channel *chan,
292 uint8_t chains_static, uint8_t chains_dynamic)
293 {
294 ctxt->channel = chan;
295
296 IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_CMD,
297 "%s: called; channel=%d\n",
298 __func__,
299 ieee80211_chan2ieee(&sc->sc_ic, chan));
300
301 return iwm_phy_ctxt_apply(sc, ctxt,
302 chains_static, chains_dynamic, IWM_FW_CTXT_ACTION_MODIFY, 0);
303 }
304
305 /*
306 * END iwlwifi/mvm/phy-ctxt.c
307 */
308