phy-ctxt.c

  1// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
  2/*
  3 * Copyright (C) 2012-2014, 2018-2025 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 */
 12u8 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 fw values
 35 */
 36u8 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 */
 69static 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
 78static 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 */
116static 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 */
137static 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
155int 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	/* From version 3, RLC is offloaded to firmware, so the driver no
163	 * longer needs to send cmd.rlc, note that we are not using any
164	 * other fields in the command - don't send it.
165	 */
166	if (iwl_mvm_has_rlc_offload(mvm) || ctxt->rlc_disabled)
167		return 0;
168
169	if (iwl_fw_lookup_cmd_ver(mvm->fw, WIDE_ID(DATA_PATH_GROUP,
170						   RLC_CONFIG_CMD), 0) < 2)
171		return 0;
172
173	BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_DRIVER_FORCE !=
174		     PHY_RX_CHAIN_DRIVER_FORCE_MSK);
175	BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_VALID !=
176		     PHY_RX_CHAIN_VALID_MSK);
177	BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_FORCE !=
178		     PHY_RX_CHAIN_FORCE_SEL_MSK);
179	BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_FORCE_MIMO !=
180		     PHY_RX_CHAIN_FORCE_MIMO_SEL_MSK);
181	BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_COUNT != PHY_RX_CHAIN_CNT_MSK);
182	BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_MIMO_COUNT !=
183		     PHY_RX_CHAIN_MIMO_CNT_MSK);
184
185	iwl_mvm_phy_ctxt_set_rxchain(mvm, ctxt, &cmd.rlc.rx_chain_info,
186				     chains_static, chains_dynamic);
187
188	IWL_DEBUG_FW(mvm, "Send RLC command: phy=%d, rx_chain_info=0x%x\n",
189		     ctxt->id, cmd.rlc.rx_chain_info);
190
191	return iwl_mvm_send_cmd_pdu(mvm, iwl_cmd_id(RLC_CONFIG_CMD,
192						    DATA_PATH_GROUP, 2),
193				    0, sizeof(cmd), &cmd);
194}
195
196/*
197 * Send a command to apply the current phy configuration. The command is send
198 * only if something in the configuration changed: in case that this is the
199 * first time that the phy configuration is applied or in case that the phy
200 * configuration changed from the previous apply.
201 */
202static int iwl_mvm_phy_ctxt_apply(struct iwl_mvm *mvm,
203				  struct iwl_mvm_phy_ctxt *ctxt,
204				  const struct cfg80211_chan_def *chandef,
205				  u8 chains_static, u8 chains_dynamic,
206				  u32 action)
207{
208	int ret;
209	int ver = iwl_fw_lookup_cmd_ver(mvm->fw, PHY_CONTEXT_CMD, 1);
210
211	if (ver >= 3 && ver <= 4) {
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		ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD,
223					   0, sizeof(cmd), &cmd);
224	} else if (ver < 3) {
225		struct iwl_phy_context_cmd_v1 cmd = {};
226		u16 len = sizeof(cmd) - iwl_mvm_chan_info_padding(mvm);
227
228		/* Set the command header fields */
229		iwl_mvm_phy_ctxt_cmd_hdr(ctxt,
230					 (struct iwl_phy_context_cmd *)&cmd,
231					 action);
232
233		/* Set the command data */
234		iwl_mvm_phy_ctxt_cmd_data_v1(mvm, ctxt, &cmd, chandef,
235					     chains_static,
236					     chains_dynamic);
237		ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD,
238					   0, len, &cmd);
239	} else {
240		IWL_ERR(mvm, "PHY ctxt cmd error ver %d not supported\n", ver);
241		return -EOPNOTSUPP;
242	}
243
244
245	if (ret) {
246		IWL_ERR(mvm, "PHY ctxt cmd error. ret=%d\n", ret);
247		return ret;
248	}
249
250	if (action != FW_CTXT_ACTION_REMOVE)
251		return iwl_mvm_phy_send_rlc(mvm, ctxt, chains_static,
252					    chains_dynamic);
253
254	return 0;
255}
256
257/*
258 * Send a command to add a PHY context based on the current HW configuration.
259 */
260int iwl_mvm_phy_ctxt_add(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt,
261			 const struct cfg80211_chan_def *chandef,
262			 const struct cfg80211_chan_def *ap,
263			 u8 chains_static, u8 chains_dynamic)
264{
265	int ret;
266
267	WARN_ON(!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
268		ctxt->ref);
269	lockdep_assert_held(&mvm->mutex);
270
271	ctxt->channel = chandef->chan;
272	ctxt->width = chandef->width;
273	ctxt->center_freq1 = chandef->center_freq1;
274
275	ret = iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef,
276				     chains_static, chains_dynamic,
277				     FW_CTXT_ACTION_ADD);
278
279	if (ret)
280		return ret;
281
282	ctxt->ref++;
283
284	return 0;
285}
286
287/*
288 * Update the number of references to the given PHY context. This is valid only
289 * in case the PHY context was already created, i.e., its reference count > 0.
290 */
291void iwl_mvm_phy_ctxt_ref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt)
292{
293	lockdep_assert_held(&mvm->mutex);
294
295	/* If we were taking the first ref, we should have
296	 * called iwl_mvm_phy_ctxt_add.
297	 */
298	WARN_ON(!ctxt->ref);
299	ctxt->ref++;
300}
301
302/*
303 * Send a command to modify the PHY context based on the current HW
304 * configuration. Note that the function does not check that the configuration
305 * changed.
306 */
307int iwl_mvm_phy_ctxt_changed(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt,
308			     const struct cfg80211_chan_def *chandef,
309			     const struct cfg80211_chan_def *ap,
310			     u8 chains_static, u8 chains_dynamic)
311{
312	enum iwl_ctxt_action action = FW_CTXT_ACTION_MODIFY;
313
314	lockdep_assert_held(&mvm->mutex);
315
316	if (WARN_ON_ONCE(!ctxt->ref))
317		return -EINVAL;
318
319	if (iwl_fw_lookup_cmd_ver(mvm->fw, WIDE_ID(DATA_PATH_GROUP,
320						   RLC_CONFIG_CMD), 0) >= 2 &&
321	    ctxt->channel == chandef->chan &&
322	    ctxt->width == chandef->width &&
323	    ctxt->center_freq1 == chandef->center_freq1)
324		return iwl_mvm_phy_send_rlc(mvm, ctxt, chains_static,
325					    chains_dynamic);
326
327	if (fw_has_capa(&mvm->fw->ucode_capa,
328			IWL_UCODE_TLV_CAPA_BINDING_CDB_SUPPORT) &&
329	    ctxt->channel->band != chandef->chan->band) {
330		int ret;
331
332		/* ... remove it here ...*/
333		ret = iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef,
334					     chains_static, chains_dynamic,
335					     FW_CTXT_ACTION_REMOVE);
336		if (ret)
337			return ret;
338
339		/* ... and proceed to add it again */
340		action = FW_CTXT_ACTION_ADD;
341	}
342
343	ctxt->channel = chandef->chan;
344	ctxt->width = chandef->width;
345	ctxt->center_freq1 = chandef->center_freq1;
346
347	return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef,
348				      chains_static, chains_dynamic,
349				      action);
350}
351
352void iwl_mvm_phy_ctxt_unref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt)
353{
354	struct cfg80211_chan_def chandef;
355	lockdep_assert_held(&mvm->mutex);
356
357	if (WARN_ON_ONCE(!ctxt))
358		return;
359
360	ctxt->ref--;
361
362	if (ctxt->ref)
363		return;
364
365	cfg80211_chandef_create(&chandef, ctxt->channel, NL80211_CHAN_NO_HT);
366
367	iwl_mvm_phy_ctxt_apply(mvm, ctxt, &chandef, 1, 1,
368			       FW_CTXT_ACTION_REMOVE);
369}
370
371static 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
385int 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}