1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3 * Copyright (C) 2012-2014, 2018-2023 Intel Corporation
4 * Copyright (C) 2013-2014 Intel Mobile Communications GmbH
5 * Copyright (C) 2017 Intel Deutschland GmbH
6 */
7 #include <net/mac80211.h>
8 #include "fw-api.h"
9 #include "mvm.h"
10
11 /* Maps the driver specific channel width definition to the fw values */
iwl_mvm_get_channel_width(struct cfg80211_chan_def * chandef)12 u8 iwl_mvm_get_channel_width(struct cfg80211_chan_def *chandef)
13 {
14 switch (chandef->width) {
15 case NL80211_CHAN_WIDTH_20_NOHT:
16 case NL80211_CHAN_WIDTH_20:
17 return IWL_PHY_CHANNEL_MODE20;
18 case NL80211_CHAN_WIDTH_40:
19 return IWL_PHY_CHANNEL_MODE40;
20 case NL80211_CHAN_WIDTH_80:
21 return IWL_PHY_CHANNEL_MODE80;
22 case NL80211_CHAN_WIDTH_160:
23 return IWL_PHY_CHANNEL_MODE160;
24 case NL80211_CHAN_WIDTH_320:
25 return IWL_PHY_CHANNEL_MODE320;
26 default:
27 WARN(1, "Invalid channel width=%u", chandef->width);
28 return IWL_PHY_CHANNEL_MODE20;
29 }
30 }
31
32 /*
33 * Maps the driver specific control channel position (relative to the center
34 * freq) definitions to the the fw values
35 */
iwl_mvm_get_ctrl_pos(struct cfg80211_chan_def * chandef)36 u8 iwl_mvm_get_ctrl_pos(struct cfg80211_chan_def *chandef)
37 {
38 int offs = chandef->chan->center_freq - chandef->center_freq1;
39 int abs_offs = abs(offs);
40 u8 ret;
41
42 if (offs == 0) {
43 /*
44 * The FW is expected to check the control channel position only
45 * when in HT/VHT and the channel width is not 20MHz. Return
46 * this value as the default one.
47 */
48 return 0;
49 }
50
51 /* this results in a value 0-7, i.e. fitting into 0b0111 */
52 ret = (abs_offs - 10) / 20;
53 /*
54 * But we need the value to be in 0b1011 because 0b0100 is
55 * IWL_PHY_CTRL_POS_ABOVE, so shift bit 2 up to land in
56 * IWL_PHY_CTRL_POS_OFFS_EXT (0b1000)
57 */
58 ret = (ret & IWL_PHY_CTRL_POS_OFFS_MSK) |
59 ((ret & BIT(2)) << 1);
60 /* and add the above bit */
61 ret |= (offs > 0) * IWL_PHY_CTRL_POS_ABOVE;
62
63 return ret;
64 }
65
66 /*
67 * Construct the generic fields of the PHY context command
68 */
iwl_mvm_phy_ctxt_cmd_hdr(struct iwl_mvm_phy_ctxt * ctxt,struct iwl_phy_context_cmd * cmd,u32 action)69 static void iwl_mvm_phy_ctxt_cmd_hdr(struct iwl_mvm_phy_ctxt *ctxt,
70 struct iwl_phy_context_cmd *cmd,
71 u32 action)
72 {
73 cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(ctxt->id,
74 ctxt->color));
75 cmd->action = cpu_to_le32(action);
76 }
77
iwl_mvm_phy_ctxt_set_rxchain(struct iwl_mvm * mvm,struct iwl_mvm_phy_ctxt * ctxt,__le32 * rxchain_info,u8 chains_static,u8 chains_dynamic)78 static void iwl_mvm_phy_ctxt_set_rxchain(struct iwl_mvm *mvm,
79 struct iwl_mvm_phy_ctxt *ctxt,
80 __le32 *rxchain_info,
81 u8 chains_static,
82 u8 chains_dynamic)
83 {
84 u8 active_cnt, idle_cnt;
85
86 /* Set rx the chains */
87 idle_cnt = chains_static;
88 active_cnt = chains_dynamic;
89
90 /* In scenarios where we only ever use a single-stream rates,
91 * i.e. legacy 11b/g/a associations, single-stream APs or even
92 * static SMPS, enable both chains to get diversity, improving
93 * the case where we're far enough from the AP that attenuation
94 * between the two antennas is sufficiently different to impact
95 * performance.
96 */
97 if (active_cnt == 1 && iwl_mvm_rx_diversity_allowed(mvm, ctxt)) {
98 idle_cnt = 2;
99 active_cnt = 2;
100 }
101
102 *rxchain_info = cpu_to_le32(iwl_mvm_get_valid_rx_ant(mvm) <<
103 PHY_RX_CHAIN_VALID_POS);
104 *rxchain_info |= cpu_to_le32(idle_cnt << PHY_RX_CHAIN_CNT_POS);
105 *rxchain_info |= cpu_to_le32(active_cnt <<
106 PHY_RX_CHAIN_MIMO_CNT_POS);
107 #ifdef CONFIG_IWLWIFI_DEBUGFS
108 if (unlikely(mvm->dbgfs_rx_phyinfo))
109 *rxchain_info = cpu_to_le32(mvm->dbgfs_rx_phyinfo);
110 #endif
111 }
112
113 /*
114 * Add the phy configuration to the PHY context command
115 */
iwl_mvm_phy_ctxt_cmd_data_v1(struct iwl_mvm * mvm,struct iwl_mvm_phy_ctxt * ctxt,struct iwl_phy_context_cmd_v1 * cmd,struct cfg80211_chan_def * chandef,u8 chains_static,u8 chains_dynamic)116 static void iwl_mvm_phy_ctxt_cmd_data_v1(struct iwl_mvm *mvm,
117 struct iwl_mvm_phy_ctxt *ctxt,
118 struct iwl_phy_context_cmd_v1 *cmd,
119 struct cfg80211_chan_def *chandef,
120 u8 chains_static, u8 chains_dynamic)
121 {
122 struct iwl_phy_context_cmd_tail *tail =
123 iwl_mvm_chan_info_cmd_tail(mvm, &cmd->ci);
124
125 /* Set the channel info data */
126 iwl_mvm_set_chan_info_chandef(mvm, &cmd->ci, chandef);
127
128 iwl_mvm_phy_ctxt_set_rxchain(mvm, ctxt, &tail->rxchain_info,
129 chains_static, chains_dynamic);
130
131 tail->txchain_info = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
132 }
133
134 /*
135 * Add the phy configuration to the PHY context command
136 */
iwl_mvm_phy_ctxt_cmd_data(struct iwl_mvm * mvm,struct iwl_mvm_phy_ctxt * ctxt,struct iwl_phy_context_cmd * cmd,struct cfg80211_chan_def * chandef,u8 chains_static,u8 chains_dynamic)137 static void iwl_mvm_phy_ctxt_cmd_data(struct iwl_mvm *mvm,
138 struct iwl_mvm_phy_ctxt *ctxt,
139 struct iwl_phy_context_cmd *cmd,
140 struct cfg80211_chan_def *chandef,
141 u8 chains_static, u8 chains_dynamic)
142 {
143 cmd->lmac_id = cpu_to_le32(iwl_mvm_get_lmac_id(mvm,
144 chandef->chan->band));
145
146 /* Set the channel info data */
147 iwl_mvm_set_chan_info_chandef(mvm, &cmd->ci, chandef);
148
149 /* we only support RLC command version 2 */
150 if (iwl_fw_lookup_cmd_ver(mvm->fw, WIDE_ID(DATA_PATH_GROUP, RLC_CONFIG_CMD), 0) < 2)
151 iwl_mvm_phy_ctxt_set_rxchain(mvm, ctxt, &cmd->rxchain_info,
152 chains_static, chains_dynamic);
153 }
154
iwl_mvm_phy_send_rlc(struct iwl_mvm * mvm,struct iwl_mvm_phy_ctxt * ctxt,u8 chains_static,u8 chains_dynamic)155 int iwl_mvm_phy_send_rlc(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt,
156 u8 chains_static, u8 chains_dynamic)
157 {
158 struct iwl_rlc_config_cmd cmd = {
159 .phy_id = cpu_to_le32(ctxt->id),
160 };
161
162 if (ctxt->rlc_disabled)
163 return 0;
164
165 if (iwl_fw_lookup_cmd_ver(mvm->fw, WIDE_ID(DATA_PATH_GROUP,
166 RLC_CONFIG_CMD), 0) < 2)
167 return 0;
168
169 BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_DRIVER_FORCE !=
170 PHY_RX_CHAIN_DRIVER_FORCE_MSK);
171 BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_VALID !=
172 PHY_RX_CHAIN_VALID_MSK);
173 BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_FORCE !=
174 PHY_RX_CHAIN_FORCE_SEL_MSK);
175 BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_FORCE_MIMO !=
176 PHY_RX_CHAIN_FORCE_MIMO_SEL_MSK);
177 BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_COUNT != PHY_RX_CHAIN_CNT_MSK);
178 BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_MIMO_COUNT !=
179 PHY_RX_CHAIN_MIMO_CNT_MSK);
180
181 iwl_mvm_phy_ctxt_set_rxchain(mvm, ctxt, &cmd.rlc.rx_chain_info,
182 chains_static, chains_dynamic);
183
184 return iwl_mvm_send_cmd_pdu(mvm, iwl_cmd_id(RLC_CONFIG_CMD,
185 DATA_PATH_GROUP, 2),
186 0, sizeof(cmd), &cmd);
187 }
188
189 /*
190 * Send a command to apply the current phy configuration. The command is send
191 * only if something in the configuration changed: in case that this is the
192 * first time that the phy configuration is applied or in case that the phy
193 * configuration changed from the previous apply.
194 */
iwl_mvm_phy_ctxt_apply(struct iwl_mvm * mvm,struct iwl_mvm_phy_ctxt * ctxt,struct cfg80211_chan_def * chandef,u8 chains_static,u8 chains_dynamic,u32 action)195 static int iwl_mvm_phy_ctxt_apply(struct iwl_mvm *mvm,
196 struct iwl_mvm_phy_ctxt *ctxt,
197 struct cfg80211_chan_def *chandef,
198 u8 chains_static, u8 chains_dynamic,
199 u32 action)
200 {
201 int ret;
202 int ver = iwl_fw_lookup_cmd_ver(mvm->fw, PHY_CONTEXT_CMD, 1);
203
204 if (ver == 3 || ver == 4) {
205 struct iwl_phy_context_cmd cmd = {};
206
207 /* Set the command header fields */
208 iwl_mvm_phy_ctxt_cmd_hdr(ctxt, &cmd, action);
209
210 /* Set the command data */
211 iwl_mvm_phy_ctxt_cmd_data(mvm, ctxt, &cmd, chandef,
212 chains_static,
213 chains_dynamic);
214
215 ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD,
216 0, sizeof(cmd), &cmd);
217 } else if (ver < 3) {
218 struct iwl_phy_context_cmd_v1 cmd = {};
219 u16 len = sizeof(cmd) - iwl_mvm_chan_info_padding(mvm);
220
221 /* Set the command header fields */
222 iwl_mvm_phy_ctxt_cmd_hdr(ctxt,
223 (struct iwl_phy_context_cmd *)&cmd,
224 action);
225
226 /* Set the command data */
227 iwl_mvm_phy_ctxt_cmd_data_v1(mvm, ctxt, &cmd, chandef,
228 chains_static,
229 chains_dynamic);
230 ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD,
231 0, len, &cmd);
232 } else {
233 IWL_ERR(mvm, "PHY ctxt cmd error ver %d not supported\n", ver);
234 return -EOPNOTSUPP;
235 }
236
237
238 if (ret) {
239 IWL_ERR(mvm, "PHY ctxt cmd error. ret=%d\n", ret);
240 return ret;
241 }
242
243 if (action != FW_CTXT_ACTION_REMOVE)
244 return iwl_mvm_phy_send_rlc(mvm, ctxt, chains_static,
245 chains_dynamic);
246
247 return 0;
248 }
249
250 /*
251 * Send a command to add a PHY context based on the current HW configuration.
252 */
iwl_mvm_phy_ctxt_add(struct iwl_mvm * mvm,struct iwl_mvm_phy_ctxt * ctxt,struct cfg80211_chan_def * chandef,u8 chains_static,u8 chains_dynamic)253 int iwl_mvm_phy_ctxt_add(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt,
254 struct cfg80211_chan_def *chandef,
255 u8 chains_static, u8 chains_dynamic)
256 {
257 WARN_ON(!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
258 ctxt->ref);
259 lockdep_assert_held(&mvm->mutex);
260
261 ctxt->channel = chandef->chan;
262 ctxt->width = chandef->width;
263 ctxt->center_freq1 = chandef->center_freq1;
264
265 return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef,
266 chains_static, chains_dynamic,
267 FW_CTXT_ACTION_ADD);
268 }
269
270 /*
271 * Update the number of references to the given PHY context. This is valid only
272 * in case the PHY context was already created, i.e., its reference count > 0.
273 */
iwl_mvm_phy_ctxt_ref(struct iwl_mvm * mvm,struct iwl_mvm_phy_ctxt * ctxt)274 void iwl_mvm_phy_ctxt_ref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt)
275 {
276 lockdep_assert_held(&mvm->mutex);
277 ctxt->ref++;
278 }
279
280 /*
281 * Send a command to modify the PHY context based on the current HW
282 * configuration. Note that the function does not check that the configuration
283 * changed.
284 */
iwl_mvm_phy_ctxt_changed(struct iwl_mvm * mvm,struct iwl_mvm_phy_ctxt * ctxt,struct cfg80211_chan_def * chandef,u8 chains_static,u8 chains_dynamic)285 int iwl_mvm_phy_ctxt_changed(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt,
286 struct cfg80211_chan_def *chandef,
287 u8 chains_static, u8 chains_dynamic)
288 {
289 enum iwl_ctxt_action action = FW_CTXT_ACTION_MODIFY;
290
291 lockdep_assert_held(&mvm->mutex);
292
293 if (iwl_fw_lookup_cmd_ver(mvm->fw, WIDE_ID(DATA_PATH_GROUP, RLC_CONFIG_CMD), 0) >= 2 &&
294 ctxt->channel == chandef->chan &&
295 ctxt->width == chandef->width &&
296 ctxt->center_freq1 == chandef->center_freq1)
297 return iwl_mvm_phy_send_rlc(mvm, ctxt, chains_static,
298 chains_dynamic);
299
300 if (fw_has_capa(&mvm->fw->ucode_capa,
301 IWL_UCODE_TLV_CAPA_BINDING_CDB_SUPPORT) &&
302 ctxt->channel->band != chandef->chan->band) {
303 int ret;
304
305 /* ... remove it here ...*/
306 ret = iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef,
307 chains_static, chains_dynamic,
308 FW_CTXT_ACTION_REMOVE);
309 if (ret)
310 return ret;
311
312 /* ... and proceed to add it again */
313 action = FW_CTXT_ACTION_ADD;
314 }
315
316 ctxt->channel = chandef->chan;
317 ctxt->width = chandef->width;
318 ctxt->center_freq1 = chandef->center_freq1;
319
320 return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef,
321 chains_static, chains_dynamic,
322 action);
323 }
324
iwl_mvm_phy_ctxt_unref(struct iwl_mvm * mvm,struct iwl_mvm_phy_ctxt * ctxt)325 void iwl_mvm_phy_ctxt_unref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt)
326 {
327 lockdep_assert_held(&mvm->mutex);
328
329 if (WARN_ON_ONCE(!ctxt))
330 return;
331
332 ctxt->ref--;
333
334 /*
335 * Move unused phy's to a default channel. When the phy is moved the,
336 * fw will cleanup immediate quiet bit if it was previously set,
337 * otherwise we might not be able to reuse this phy.
338 */
339 if (ctxt->ref == 0) {
340 struct ieee80211_channel *chan = NULL;
341 struct cfg80211_chan_def chandef;
342 struct ieee80211_supported_band *sband;
343 enum nl80211_band band;
344 int channel;
345
346 for (band = NL80211_BAND_2GHZ; band < NUM_NL80211_BANDS; band++) {
347 sband = mvm->hw->wiphy->bands[band];
348
349 if (!sband)
350 continue;
351
352 for (channel = 0; channel < sband->n_channels; channel++)
353 if (!(sband->channels[channel].flags &
354 IEEE80211_CHAN_DISABLED)) {
355 chan = &sband->channels[channel];
356 break;
357 }
358
359 if (chan)
360 break;
361 }
362
363 if (WARN_ON(!chan))
364 return;
365
366 cfg80211_chandef_create(&chandef, chan, NL80211_CHAN_NO_HT);
367 iwl_mvm_phy_ctxt_changed(mvm, ctxt, &chandef, 1, 1);
368 }
369 }
370
iwl_mvm_binding_iterator(void * _data,u8 * mac,struct ieee80211_vif * vif)371 static void iwl_mvm_binding_iterator(void *_data, u8 *mac,
372 struct ieee80211_vif *vif)
373 {
374 unsigned long *data = _data;
375 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
376
377 if (!mvmvif->deflink.phy_ctxt)
378 return;
379
380 if (vif->type == NL80211_IFTYPE_STATION ||
381 vif->type == NL80211_IFTYPE_AP)
382 __set_bit(mvmvif->deflink.phy_ctxt->id, data);
383 }
384
iwl_mvm_phy_ctx_count(struct iwl_mvm * mvm)385 int iwl_mvm_phy_ctx_count(struct iwl_mvm *mvm)
386 {
387 unsigned long phy_ctxt_counter = 0;
388
389 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
390 IEEE80211_IFACE_ITER_NORMAL,
391 iwl_mvm_binding_iterator,
392 &phy_ctxt_counter);
393
394 return hweight8(phy_ctxt_counter);
395 }
396