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[J-linux.git] / drivers / net / wireless / intel / iwlwifi / mvm / phy-ctxt.c
1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3  * Copyright (C) 2012-2014, 2018-2024 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 */
12 u8 iwl_mvm_get_channel_width(const 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  */
36 u8 iwl_mvm_get_ctrl_pos(const 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  */
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
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  */
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                                          const 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  */
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                                       const 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
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         IWL_DEBUG_FW(mvm, "Send RLC command: phy=%d, rx_chain_info=0x%x\n",
185                      ctxt->id, cmd.rlc.rx_chain_info);
186
187         return iwl_mvm_send_cmd_pdu(mvm, iwl_cmd_id(RLC_CONFIG_CMD,
188                                                     DATA_PATH_GROUP, 2),
189                                     0, sizeof(cmd), &cmd);
190 }
191
192 /*
193  * Send a command to apply the current phy configuration. The command is send
194  * only if something in the configuration changed: in case that this is the
195  * first time that the phy configuration is applied or in case that the phy
196  * configuration changed from the previous apply.
197  */
198 static int iwl_mvm_phy_ctxt_apply(struct iwl_mvm *mvm,
199                                   struct iwl_mvm_phy_ctxt *ctxt,
200                                   const struct cfg80211_chan_def *chandef,
201                                   const struct cfg80211_chan_def *ap,
202                                   u8 chains_static, u8 chains_dynamic,
203                                   u32 action)
204 {
205         int ret;
206         int ver = iwl_fw_lookup_cmd_ver(mvm->fw, PHY_CONTEXT_CMD, 1);
207
208         if (ver < 5 || !ap || !ap->chan)
209                 ap = NULL;
210
211         if (ver >= 3 && ver <= 6) {
212                 struct iwl_phy_context_cmd cmd = {};
213
214                 /* Set the command header fields */
215                 iwl_mvm_phy_ctxt_cmd_hdr(ctxt, &cmd, action);
216
217                 /* Set the command data */
218                 iwl_mvm_phy_ctxt_cmd_data(mvm, ctxt, &cmd, chandef,
219                                           chains_static,
220                                           chains_dynamic);
221
222                 if (ap) {
223                         cmd.sbb_bandwidth = iwl_mvm_get_channel_width(ap);
224                         cmd.sbb_ctrl_channel_loc = iwl_mvm_get_ctrl_pos(ap);
225                 }
226
227                 if (ver == 6)
228                         cmd.puncture_mask = cpu_to_le16(chandef->punctured);
229
230                 ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD,
231                                            0, sizeof(cmd), &cmd);
232         } else if (ver < 3) {
233                 struct iwl_phy_context_cmd_v1 cmd = {};
234                 u16 len = sizeof(cmd) - iwl_mvm_chan_info_padding(mvm);
235
236                 /* Set the command header fields */
237                 iwl_mvm_phy_ctxt_cmd_hdr(ctxt,
238                                          (struct iwl_phy_context_cmd *)&cmd,
239                                          action);
240
241                 /* Set the command data */
242                 iwl_mvm_phy_ctxt_cmd_data_v1(mvm, ctxt, &cmd, chandef,
243                                              chains_static,
244                                              chains_dynamic);
245                 ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD,
246                                            0, len, &cmd);
247         } else {
248                 IWL_ERR(mvm, "PHY ctxt cmd error ver %d not supported\n", ver);
249                 return -EOPNOTSUPP;
250         }
251
252
253         if (ret) {
254                 IWL_ERR(mvm, "PHY ctxt cmd error. ret=%d\n", ret);
255                 return ret;
256         }
257
258         if (action != FW_CTXT_ACTION_REMOVE)
259                 return iwl_mvm_phy_send_rlc(mvm, ctxt, chains_static,
260                                             chains_dynamic);
261
262         return 0;
263 }
264
265 /*
266  * Send a command to add a PHY context based on the current HW configuration.
267  */
268 int iwl_mvm_phy_ctxt_add(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt,
269                          const struct cfg80211_chan_def *chandef,
270                          const struct cfg80211_chan_def *ap,
271                          u8 chains_static, u8 chains_dynamic)
272 {
273         int ret;
274
275         WARN_ON(!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
276                 ctxt->ref);
277         lockdep_assert_held(&mvm->mutex);
278
279         ctxt->channel = chandef->chan;
280         ctxt->width = chandef->width;
281         ctxt->center_freq1 = chandef->center_freq1;
282
283         ret = iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, ap,
284                                      chains_static, chains_dynamic,
285                                      FW_CTXT_ACTION_ADD);
286
287         if (ret)
288                 return ret;
289
290         ctxt->ref++;
291
292         return 0;
293 }
294
295 /*
296  * Update the number of references to the given PHY context. This is valid only
297  * in case the PHY context was already created, i.e., its reference count > 0.
298  */
299 void iwl_mvm_phy_ctxt_ref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt)
300 {
301         lockdep_assert_held(&mvm->mutex);
302
303         /* If we were taking the first ref, we should have
304          * called iwl_mvm_phy_ctxt_add.
305          */
306         WARN_ON(!ctxt->ref);
307         ctxt->ref++;
308 }
309
310 /*
311  * Send a command to modify the PHY context based on the current HW
312  * configuration. Note that the function does not check that the configuration
313  * changed.
314  */
315 int iwl_mvm_phy_ctxt_changed(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt,
316                              const struct cfg80211_chan_def *chandef,
317                              const struct cfg80211_chan_def *ap,
318                              u8 chains_static, u8 chains_dynamic)
319 {
320         enum iwl_ctxt_action action = FW_CTXT_ACTION_MODIFY;
321
322         lockdep_assert_held(&mvm->mutex);
323
324         if (WARN_ON_ONCE(!ctxt->ref))
325                 return -EINVAL;
326
327         if (iwl_fw_lookup_cmd_ver(mvm->fw, WIDE_ID(DATA_PATH_GROUP,
328                                                    RLC_CONFIG_CMD), 0) >= 2 &&
329             ctxt->channel == chandef->chan &&
330             ctxt->width == chandef->width &&
331             ctxt->center_freq1 == chandef->center_freq1)
332                 return iwl_mvm_phy_send_rlc(mvm, ctxt, chains_static,
333                                             chains_dynamic);
334
335         if (fw_has_capa(&mvm->fw->ucode_capa,
336                         IWL_UCODE_TLV_CAPA_BINDING_CDB_SUPPORT) &&
337             ctxt->channel->band != chandef->chan->band) {
338                 int ret;
339
340                 /* ... remove it here ...*/
341                 ret = iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, NULL,
342                                              chains_static, chains_dynamic,
343                                              FW_CTXT_ACTION_REMOVE);
344                 if (ret)
345                         return ret;
346
347                 /* ... and proceed to add it again */
348                 action = FW_CTXT_ACTION_ADD;
349         }
350
351         ctxt->channel = chandef->chan;
352         ctxt->width = chandef->width;
353         ctxt->center_freq1 = chandef->center_freq1;
354
355         return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, ap,
356                                       chains_static, chains_dynamic,
357                                       action);
358 }
359
360 void iwl_mvm_phy_ctxt_unref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt)
361 {
362         struct cfg80211_chan_def chandef;
363         lockdep_assert_held(&mvm->mutex);
364
365         if (WARN_ON_ONCE(!ctxt))
366                 return;
367
368         ctxt->ref--;
369
370         if (ctxt->ref)
371                 return;
372
373         cfg80211_chandef_create(&chandef, ctxt->channel, NL80211_CHAN_NO_HT);
374
375         iwl_mvm_phy_ctxt_apply(mvm, ctxt, &chandef, NULL, 1, 1,
376                                FW_CTXT_ACTION_REMOVE);
377 }
378
379 static void iwl_mvm_binding_iterator(void *_data, u8 *mac,
380                                      struct ieee80211_vif *vif)
381 {
382         unsigned long *data = _data;
383         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
384
385         if (!mvmvif->deflink.phy_ctxt)
386                 return;
387
388         if (vif->type == NL80211_IFTYPE_STATION ||
389             vif->type == NL80211_IFTYPE_AP)
390                 __set_bit(mvmvif->deflink.phy_ctxt->id, data);
391 }
392
393 int iwl_mvm_phy_ctx_count(struct iwl_mvm *mvm)
394 {
395         unsigned long phy_ctxt_counter = 0;
396
397         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
398                                                    IEEE80211_IFACE_ITER_NORMAL,
399                                                    iwl_mvm_binding_iterator,
400                                                    &phy_ctxt_counter);
401
402         return hweight8(phy_ctxt_counter);
403 }
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