drivers/net/wireless/intel/iwlwifi/mvm/phy-ctxt.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
 /*
  * Copyright (C) 2012-2014, 2018-2024 Intel Corporation
  * Copyright (C) 2013-2014 Intel Mobile Communications GmbH
  * Copyright (C) 2017 Intel Deutschland GmbH
  */
 #include <net/mac80211.h>
 #include "fw-api.h"
 #include "mvm.h"

 /* Maps the driver specific channel width definition to the fw values */
 u8 iwl_mvm_get_channel_width(const struct cfg80211_chan_def *chandef)
 {
 	switch (chandef->width) {
 	case NL80211_CHAN_WIDTH_20_NOHT:
 	case NL80211_CHAN_WIDTH_20:
 		return IWL_PHY_CHANNEL_MODE20;
 	case NL80211_CHAN_WIDTH_40:
 		return IWL_PHY_CHANNEL_MODE40;
 	case NL80211_CHAN_WIDTH_80:
 		return IWL_PHY_CHANNEL_MODE80;
 	case NL80211_CHAN_WIDTH_160:
 		return IWL_PHY_CHANNEL_MODE160;
 	case NL80211_CHAN_WIDTH_320:
 		return IWL_PHY_CHANNEL_MODE320;
 	default:
 		WARN(1, "Invalid channel width=%u", chandef->width);
 		return IWL_PHY_CHANNEL_MODE20;
 	}
 }

 /*
  * Maps the driver specific control channel position (relative to the center
  * freq) definitions to the the fw values
  */
 u8 iwl_mvm_get_ctrl_pos(const struct cfg80211_chan_def *chandef)
 {
 	int offs = chandef->chan->center_freq - chandef->center_freq1;
 	int abs_offs = abs(offs);
 	u8 ret;

 	if (offs == 0) {
 		/*
 		 * The FW is expected to check the control channel position only
 		 * when in HT/VHT and the channel width is not 20MHz. Return
 		 * this value as the default one.
 		 */
 		return 0;
 	}

 	/* this results in a value 0-7, i.e. fitting into 0b0111 */
 	ret = (abs_offs - 10) / 20;
 	/*
 	 * But we need the value to be in 0b1011 because 0b0100 is
 	 * IWL_PHY_CTRL_POS_ABOVE, so shift bit 2 up to land in
 	 * IWL_PHY_CTRL_POS_OFFS_EXT (0b1000)
 	 */
 	ret = (ret & IWL_PHY_CTRL_POS_OFFS_MSK) |
 	      ((ret & BIT(2)) << 1);
 	/* and add the above bit */
 	ret |= (offs > 0) * IWL_PHY_CTRL_POS_ABOVE;

 	return ret;
 }

 /*
  * Construct the generic fields of the PHY context command
  */
 static void iwl_mvm_phy_ctxt_cmd_hdr(struct iwl_mvm_phy_ctxt *ctxt,
 				     struct iwl_phy_context_cmd *cmd,
 				     u32 action)
 {
 	cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(ctxt->id,
 							    ctxt->color));
 	cmd->action = cpu_to_le32(action);
 }

 static void 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)
 {
 	u8 active_cnt, idle_cnt;

 	/* Set rx the chains */
 	idle_cnt = chains_static;
 	active_cnt = chains_dynamic;

 	/* In scenarios where we only ever use a single-stream rates,
 	 * i.e. legacy 11b/g/a associations, single-stream APs or even
 	 * static SMPS, enable both chains to get diversity, improving
 	 * the case where we're far enough from the AP that attenuation
 	 * between the two antennas is sufficiently different to impact
 	 * performance.
 	 */
 	if (active_cnt == 1 && iwl_mvm_rx_diversity_allowed(mvm, ctxt)) {
 		idle_cnt = 2;
 		active_cnt = 2;
 	}

 	*rxchain_info = cpu_to_le32(iwl_mvm_get_valid_rx_ant(mvm) <<
 					PHY_RX_CHAIN_VALID_POS);
 	*rxchain_info |= cpu_to_le32(idle_cnt << PHY_RX_CHAIN_CNT_POS);
 	*rxchain_info |= cpu_to_le32(active_cnt <<
 					 PHY_RX_CHAIN_MIMO_CNT_POS);
 #ifdef CONFIG_IWLWIFI_DEBUGFS
 	if (unlikely(mvm->dbgfs_rx_phyinfo))
 		*rxchain_info = cpu_to_le32(mvm->dbgfs_rx_phyinfo);
 #endif
 }

 /*
  * Add the phy configuration to the PHY context command
  */
 static void iwl_mvm_phy_ctxt_cmd_data_v1(struct iwl_mvm *mvm,
 					 struct iwl_mvm_phy_ctxt *ctxt,
 					 struct iwl_phy_context_cmd_v1 *cmd,
 					 const struct cfg80211_chan_def *chandef,
 					 u8 chains_static, u8 chains_dynamic)
 {
 	struct iwl_phy_context_cmd_tail *tail =
 		iwl_mvm_chan_info_cmd_tail(mvm, &cmd->ci);

 	/* Set the channel info data */
 	iwl_mvm_set_chan_info_chandef(mvm, &cmd->ci, chandef);

 	iwl_mvm_phy_ctxt_set_rxchain(mvm, ctxt, &tail->rxchain_info,
 				     chains_static, chains_dynamic);

 	tail->txchain_info = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
 }

 /*
  * Add the phy configuration to the PHY context command
  */
 static void iwl_mvm_phy_ctxt_cmd_data(struct iwl_mvm *mvm,
 				      struct iwl_mvm_phy_ctxt *ctxt,
 				      struct iwl_phy_context_cmd *cmd,
 				      const struct cfg80211_chan_def *chandef,
 				      u8 chains_static, u8 chains_dynamic)
 {
 	cmd->lmac_id = cpu_to_le32(iwl_mvm_get_lmac_id(mvm,
 						       chandef->chan->band));

 	/* Set the channel info data */
 	iwl_mvm_set_chan_info_chandef(mvm, &cmd->ci, chandef);

 	/* we only support RLC command version 2 */
 	if (iwl_fw_lookup_cmd_ver(mvm->fw, WIDE_ID(DATA_PATH_GROUP, RLC_CONFIG_CMD), 0) < 2)
 		iwl_mvm_phy_ctxt_set_rxchain(mvm, ctxt, &cmd->rxchain_info,
 					     chains_static, chains_dynamic);
 }

 int iwl_mvm_phy_send_rlc(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt,
 			 u8 chains_static, u8 chains_dynamic)
 {
 	struct iwl_rlc_config_cmd cmd = {
 		.phy_id = cpu_to_le32(ctxt->id),
 	};

 	/* From version 3, RLC is offloaded to firmware, so the driver no
 	 * longer needs to send cmd.rlc, note that we are not using any
 	 * other fields in the command - don't send it.
 	 */
 	if (iwl_mvm_has_rlc_offload(mvm) || ctxt->rlc_disabled)
 		return 0;

 	if (iwl_fw_lookup_cmd_ver(mvm->fw, WIDE_ID(DATA_PATH_GROUP,
 						   RLC_CONFIG_CMD), 0) < 2)
 		return 0;

 	BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_DRIVER_FORCE !=
 		     PHY_RX_CHAIN_DRIVER_FORCE_MSK);
 	BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_VALID !=
 		     PHY_RX_CHAIN_VALID_MSK);
 	BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_FORCE !=
 		     PHY_RX_CHAIN_FORCE_SEL_MSK);
 	BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_FORCE_MIMO !=
 		     PHY_RX_CHAIN_FORCE_MIMO_SEL_MSK);
 	BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_COUNT != PHY_RX_CHAIN_CNT_MSK);
 	BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_MIMO_COUNT !=
 		     PHY_RX_CHAIN_MIMO_CNT_MSK);

 	iwl_mvm_phy_ctxt_set_rxchain(mvm, ctxt, &cmd.rlc.rx_chain_info,
 				     chains_static, chains_dynamic);

 	IWL_DEBUG_FW(mvm, "Send RLC command: phy=%d, rx_chain_info=0x%x\n",
 		     ctxt->id, cmd.rlc.rx_chain_info);

 	return iwl_mvm_send_cmd_pdu(mvm, iwl_cmd_id(RLC_CONFIG_CMD,
 						    DATA_PATH_GROUP, 2),
 				    0, sizeof(cmd), &cmd);
 }

 /*
  * Send a command to apply the current phy configuration. The command is send
  * only if something in the configuration changed: in case that this is the
  * first time that the phy configuration is applied or in case that the phy
  * configuration changed from the previous apply.
  */
 static int iwl_mvm_phy_ctxt_apply(struct iwl_mvm *mvm,
 				  struct iwl_mvm_phy_ctxt *ctxt,
 				  const struct cfg80211_chan_def *chandef,
 				  const struct cfg80211_chan_def *ap,
 				  u8 chains_static, u8 chains_dynamic,
 				  u32 action)
 {
 	int ret;
 	int ver = iwl_fw_lookup_cmd_ver(mvm->fw, PHY_CONTEXT_CMD, 1);

 	if (ver < 5 || !ap || !ap->chan)
 		ap = NULL;

 	if (ver >= 3 && ver <= 6) {
 		struct iwl_phy_context_cmd cmd = {};

 		/* Set the command header fields */
 		iwl_mvm_phy_ctxt_cmd_hdr(ctxt, &cmd, action);

 		/* Set the command data */
 		iwl_mvm_phy_ctxt_cmd_data(mvm, ctxt, &cmd, chandef,
 					  chains_static,
 					  chains_dynamic);

 		if (ap) {
 			cmd.sbb_bandwidth = iwl_mvm_get_channel_width(ap);
 			cmd.sbb_ctrl_channel_loc = iwl_mvm_get_ctrl_pos(ap);
 		}

 		if (ver == 6)
 			cmd.puncture_mask = cpu_to_le16(chandef->punctured);

 		ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD,
 					   0, sizeof(cmd), &cmd);
 	} else if (ver < 3) {
 		struct iwl_phy_context_cmd_v1 cmd = {};
 		u16 len = sizeof(cmd) - iwl_mvm_chan_info_padding(mvm);

 		/* Set the command header fields */
 		iwl_mvm_phy_ctxt_cmd_hdr(ctxt,
 					 (struct iwl_phy_context_cmd *)&cmd,
 					 action);

 		/* Set the command data */
 		iwl_mvm_phy_ctxt_cmd_data_v1(mvm, ctxt, &cmd, chandef,
 					     chains_static,
 					     chains_dynamic);
 		ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD,
 					   0, len, &cmd);
 	} else {
 		IWL_ERR(mvm, "PHY ctxt cmd error ver %d not supported\n", ver);
 		return -EOPNOTSUPP;
 	}


 	if (ret) {
 		IWL_ERR(mvm, "PHY ctxt cmd error. ret=%d\n", ret);
 		return ret;
 	}

 	if (action != FW_CTXT_ACTION_REMOVE)
 		return iwl_mvm_phy_send_rlc(mvm, ctxt, chains_static,
 					    chains_dynamic);

 	return 0;
 }

 /*
  * Send a command to add a PHY context based on the current HW configuration.
  */
 int iwl_mvm_phy_ctxt_add(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt,
 			 const struct cfg80211_chan_def *chandef,
 			 const struct cfg80211_chan_def *ap,
 			 u8 chains_static, u8 chains_dynamic)
 {
 	int ret;

 	WARN_ON(!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
 		ctxt->ref);
 	lockdep_assert_held(&mvm->mutex);

 	ctxt->channel = chandef->chan;
 	ctxt->width = chandef->width;
 	ctxt->center_freq1 = chandef->center_freq1;

 	ret = iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, ap,
 				     chains_static, chains_dynamic,
 				     FW_CTXT_ACTION_ADD);

 	if (ret)
 		return ret;

 	ctxt->ref++;

 	return 0;
 }

 /*
  * Update the number of references to the given PHY context. This is valid only
  * in case the PHY context was already created, i.e., its reference count > 0.
  */
 void iwl_mvm_phy_ctxt_ref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt)
 {
 	lockdep_assert_held(&mvm->mutex);

 	/* If we were taking the first ref, we should have
 	 * called iwl_mvm_phy_ctxt_add.
 	 */
 	WARN_ON(!ctxt->ref);
 	ctxt->ref++;
 }

 /*
  * Send a command to modify the PHY context based on the current HW
  * configuration. Note that the function does not check that the configuration
  * changed.
  */
 int iwl_mvm_phy_ctxt_changed(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt,
 			     const struct cfg80211_chan_def *chandef,
 			     const struct cfg80211_chan_def *ap,
 			     u8 chains_static, u8 chains_dynamic)
 {
 	enum iwl_ctxt_action action = FW_CTXT_ACTION_MODIFY;

 	lockdep_assert_held(&mvm->mutex);

 	if (WARN_ON_ONCE(!ctxt->ref))
 		return -EINVAL;

 	if (iwl_fw_lookup_cmd_ver(mvm->fw, WIDE_ID(DATA_PATH_GROUP,
 						   RLC_CONFIG_CMD), 0) >= 2 &&
 	    ctxt->channel == chandef->chan &&
 	    ctxt->width == chandef->width &&
 	    ctxt->center_freq1 == chandef->center_freq1)
 		return iwl_mvm_phy_send_rlc(mvm, ctxt, chains_static,
 					    chains_dynamic);

 	if (fw_has_capa(&mvm->fw->ucode_capa,
 			IWL_UCODE_TLV_CAPA_BINDING_CDB_SUPPORT) &&
 	    ctxt->channel->band != chandef->chan->band) {
 		int ret;

 		/* ... remove it here ...*/
 		ret = iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, NULL,
 					     chains_static, chains_dynamic,
 					     FW_CTXT_ACTION_REMOVE);
 		if (ret)
 			return ret;

 		/* ... and proceed to add it again */
 		action = FW_CTXT_ACTION_ADD;
 	}

 	ctxt->channel = chandef->chan;
 	ctxt->width = chandef->width;
 	ctxt->center_freq1 = chandef->center_freq1;

 	return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, ap,
 				      chains_static, chains_dynamic,
 				      action);
 }

 void iwl_mvm_phy_ctxt_unref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt)
 {
 	struct cfg80211_chan_def chandef;
 	lockdep_assert_held(&mvm->mutex);

 	if (WARN_ON_ONCE(!ctxt))
 		return;

 	ctxt->ref--;

 	if (ctxt->ref)
 		return;

 	cfg80211_chandef_create(&chandef, ctxt->channel, NL80211_CHAN_NO_HT);

 	iwl_mvm_phy_ctxt_apply(mvm, ctxt, &chandef, NULL, 1, 1,
 			       FW_CTXT_ACTION_REMOVE);
 }

 static void iwl_mvm_binding_iterator(void *_data, u8 *mac,
 				     struct ieee80211_vif *vif)
 {
 	unsigned long *data = _data;
 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

 	if (!mvmvif->deflink.phy_ctxt)
 		return;

 	if (vif->type == NL80211_IFTYPE_STATION ||
 	    vif->type == NL80211_IFTYPE_AP)
 		__set_bit(mvmvif->deflink.phy_ctxt->id, data);
 }

 int iwl_mvm_phy_ctx_count(struct iwl_mvm *mvm)
 {
 	unsigned long phy_ctxt_counter = 0;

 	ieee80211_iterate_active_interfaces_atomic(mvm->hw,
 						   IEEE80211_IFACE_ITER_NORMAL,
 						   iwl_mvm_binding_iterator,
 						   &phy_ctxt_counter);

 	return hweight8(phy_ctxt_counter);
 }
	// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
	/*
	* Copyright (C) 2012-2014, 2018-2024 Intel Corporation
	* Copyright (C) 2013-2014 Intel Mobile Communications GmbH
	* Copyright (C) 2017 Intel Deutschland GmbH
	*/
	#include <net/mac80211.h>
	#include "fw-api.h"
	#include "mvm.h"

	/* Maps the driver specific channel width definition to the fw values */
	u8 iwl_mvm_get_channel_width(const struct cfg80211_chan_def *chandef)
	{
	switch (chandef->width) {
	case NL80211_CHAN_WIDTH_20_NOHT:
	case NL80211_CHAN_WIDTH_20:
	return IWL_PHY_CHANNEL_MODE20;
	case NL80211_CHAN_WIDTH_40:
	return IWL_PHY_CHANNEL_MODE40;
	case NL80211_CHAN_WIDTH_80:
	return IWL_PHY_CHANNEL_MODE80;
	case NL80211_CHAN_WIDTH_160:
	return IWL_PHY_CHANNEL_MODE160;
	case NL80211_CHAN_WIDTH_320:
	return IWL_PHY_CHANNEL_MODE320;
	default:
	WARN(1, "Invalid channel width=%u", chandef->width);
	return IWL_PHY_CHANNEL_MODE20;
	}
	}

	/*
	* Maps the driver specific control channel position (relative to the center
	* freq) definitions to the the fw values
	*/
	u8 iwl_mvm_get_ctrl_pos(const struct cfg80211_chan_def *chandef)
	{
	int offs = chandef->chan->center_freq - chandef->center_freq1;
	int abs_offs = abs(offs);
	u8 ret;

	if (offs == 0) {
	/*
	* The FW is expected to check the control channel position only
	* when in HT/VHT and the channel width is not 20MHz. Return
	* this value as the default one.
	*/
	return 0;
	}

	/* this results in a value 0-7, i.e. fitting into 0b0111 */
	ret = (abs_offs - 10) / 20;
	/*
	* But we need the value to be in 0b1011 because 0b0100 is
	* IWL_PHY_CTRL_POS_ABOVE, so shift bit 2 up to land in
	* IWL_PHY_CTRL_POS_OFFS_EXT (0b1000)
	*/
	ret = (ret & IWL_PHY_CTRL_POS_OFFS_MSK) \|
	((ret & BIT(2)) << 1);
	/* and add the above bit */
	ret \|= (offs > 0) * IWL_PHY_CTRL_POS_ABOVE;

	return ret;
	}

	/*
	* Construct the generic fields of the PHY context command
	*/
	static void iwl_mvm_phy_ctxt_cmd_hdr(struct iwl_mvm_phy_ctxt *ctxt,
	struct iwl_phy_context_cmd *cmd,
	u32 action)
	{
	cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(ctxt->id,
	ctxt->color));
	cmd->action = cpu_to_le32(action);
	}

	static void 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)
	{
	u8 active_cnt, idle_cnt;

	/* Set rx the chains */
	idle_cnt = chains_static;
	active_cnt = chains_dynamic;

	/* In scenarios where we only ever use a single-stream rates,
	* i.e. legacy 11b/g/a associations, single-stream APs or even
	* static SMPS, enable both chains to get diversity, improving
	* the case where we're far enough from the AP that attenuation
	* between the two antennas is sufficiently different to impact
	* performance.
	*/
	if (active_cnt == 1 && iwl_mvm_rx_diversity_allowed(mvm, ctxt)) {
	idle_cnt = 2;
	active_cnt = 2;
	}

	*rxchain_info = cpu_to_le32(iwl_mvm_get_valid_rx_ant(mvm) <<
	PHY_RX_CHAIN_VALID_POS);
	*rxchain_info \|= cpu_to_le32(idle_cnt << PHY_RX_CHAIN_CNT_POS);
	*rxchain_info \|= cpu_to_le32(active_cnt <<
	PHY_RX_CHAIN_MIMO_CNT_POS);
	#ifdef CONFIG_IWLWIFI_DEBUGFS
	if (unlikely(mvm->dbgfs_rx_phyinfo))
	*rxchain_info = cpu_to_le32(mvm->dbgfs_rx_phyinfo);
	#endif
	}

	/*
	* Add the phy configuration to the PHY context command
	*/
	static void iwl_mvm_phy_ctxt_cmd_data_v1(struct iwl_mvm *mvm,
	struct iwl_mvm_phy_ctxt *ctxt,
	struct iwl_phy_context_cmd_v1 *cmd,
	const struct cfg80211_chan_def *chandef,
	u8 chains_static, u8 chains_dynamic)
	{
	struct iwl_phy_context_cmd_tail *tail =
	iwl_mvm_chan_info_cmd_tail(mvm, &cmd->ci);

	/* Set the channel info data */
	iwl_mvm_set_chan_info_chandef(mvm, &cmd->ci, chandef);

	iwl_mvm_phy_ctxt_set_rxchain(mvm, ctxt, &tail->rxchain_info,
	chains_static, chains_dynamic);

	tail->txchain_info = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
	}

	/*
	* Add the phy configuration to the PHY context command
	*/
	static void iwl_mvm_phy_ctxt_cmd_data(struct iwl_mvm *mvm,
	struct iwl_mvm_phy_ctxt *ctxt,
	struct iwl_phy_context_cmd *cmd,
	const struct cfg80211_chan_def *chandef,
	u8 chains_static, u8 chains_dynamic)
	{
	cmd->lmac_id = cpu_to_le32(iwl_mvm_get_lmac_id(mvm,
	chandef->chan->band));

	/* Set the channel info data */
	iwl_mvm_set_chan_info_chandef(mvm, &cmd->ci, chandef);

	/* we only support RLC command version 2 */
	if (iwl_fw_lookup_cmd_ver(mvm->fw, WIDE_ID(DATA_PATH_GROUP, RLC_CONFIG_CMD), 0) < 2)
	iwl_mvm_phy_ctxt_set_rxchain(mvm, ctxt, &cmd->rxchain_info,
	chains_static, chains_dynamic);
	}

	int iwl_mvm_phy_send_rlc(struct iwl_mvm mvm, struct iwl_mvm_phy_ctxt ctxt,
	u8 chains_static, u8 chains_dynamic)
	{
	struct iwl_rlc_config_cmd cmd = {
	.phy_id = cpu_to_le32(ctxt->id),
	};

	/* From version 3, RLC is offloaded to firmware, so the driver no
	* longer needs to send cmd.rlc, note that we are not using any
	* other fields in the command - don't send it.
	*/
	if (iwl_mvm_has_rlc_offload(mvm) \|\| ctxt->rlc_disabled)
	return 0;

	if (iwl_fw_lookup_cmd_ver(mvm->fw, WIDE_ID(DATA_PATH_GROUP,
	RLC_CONFIG_CMD), 0) < 2)
	return 0;

	BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_DRIVER_FORCE !=
	PHY_RX_CHAIN_DRIVER_FORCE_MSK);
	BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_VALID !=
	PHY_RX_CHAIN_VALID_MSK);
	BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_FORCE !=
	PHY_RX_CHAIN_FORCE_SEL_MSK);
	BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_FORCE_MIMO !=
	PHY_RX_CHAIN_FORCE_MIMO_SEL_MSK);
	BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_COUNT != PHY_RX_CHAIN_CNT_MSK);
	BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_MIMO_COUNT !=
	PHY_RX_CHAIN_MIMO_CNT_MSK);

	iwl_mvm_phy_ctxt_set_rxchain(mvm, ctxt, &cmd.rlc.rx_chain_info,
	chains_static, chains_dynamic);

	IWL_DEBUG_FW(mvm, "Send RLC command: phy=%d, rx_chain_info=0x%x\n",
	ctxt->id, cmd.rlc.rx_chain_info);

	return iwl_mvm_send_cmd_pdu(mvm, iwl_cmd_id(RLC_CONFIG_CMD,
	DATA_PATH_GROUP, 2),
	0, sizeof(cmd), &cmd);
	}

	/*
	* Send a command to apply the current phy configuration. The command is send
	* only if something in the configuration changed: in case that this is the
	* first time that the phy configuration is applied or in case that the phy
	* configuration changed from the previous apply.
	*/
	static int iwl_mvm_phy_ctxt_apply(struct iwl_mvm *mvm,
	struct iwl_mvm_phy_ctxt *ctxt,
	const struct cfg80211_chan_def *chandef,
	const struct cfg80211_chan_def *ap,
	u8 chains_static, u8 chains_dynamic,
	u32 action)
	{
	int ret;
	int ver = iwl_fw_lookup_cmd_ver(mvm->fw, PHY_CONTEXT_CMD, 1);

	if (ver < 5 \|\| !ap \|\| !ap->chan)
	ap = NULL;

	if (ver >= 3 && ver <= 6) {
	struct iwl_phy_context_cmd cmd = {};

	/* Set the command header fields */
	iwl_mvm_phy_ctxt_cmd_hdr(ctxt, &cmd, action);

	/* Set the command data */
	iwl_mvm_phy_ctxt_cmd_data(mvm, ctxt, &cmd, chandef,
	chains_static,
	chains_dynamic);

	if (ap) {
	cmd.sbb_bandwidth = iwl_mvm_get_channel_width(ap);
	cmd.sbb_ctrl_channel_loc = iwl_mvm_get_ctrl_pos(ap);
	}

	if (ver == 6)
	cmd.puncture_mask = cpu_to_le16(chandef->punctured);

	ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD,
	0, sizeof(cmd), &cmd);
	} else if (ver < 3) {
	struct iwl_phy_context_cmd_v1 cmd = {};
	u16 len = sizeof(cmd) - iwl_mvm_chan_info_padding(mvm);

	/* Set the command header fields */
	iwl_mvm_phy_ctxt_cmd_hdr(ctxt,
	(struct iwl_phy_context_cmd *)&cmd,
	action);

	/* Set the command data */
	iwl_mvm_phy_ctxt_cmd_data_v1(mvm, ctxt, &cmd, chandef,
	chains_static,
	chains_dynamic);
	ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD,
	0, len, &cmd);
	} else {
	IWL_ERR(mvm, "PHY ctxt cmd error ver %d not supported\n", ver);
	return -EOPNOTSUPP;
	}


	if (ret) {
	IWL_ERR(mvm, "PHY ctxt cmd error. ret=%d\n", ret);
	return ret;
	}

	if (action != FW_CTXT_ACTION_REMOVE)
	return iwl_mvm_phy_send_rlc(mvm, ctxt, chains_static,
	chains_dynamic);

	return 0;
	}

	/*
	* Send a command to add a PHY context based on the current HW configuration.
	*/
	int iwl_mvm_phy_ctxt_add(struct iwl_mvm mvm, struct iwl_mvm_phy_ctxt ctxt,
	const struct cfg80211_chan_def *chandef,
	const struct cfg80211_chan_def *ap,
	u8 chains_static, u8 chains_dynamic)
	{
	int ret;

	WARN_ON(!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
	ctxt->ref);
	lockdep_assert_held(&mvm->mutex);

	ctxt->channel = chandef->chan;
	ctxt->width = chandef->width;
	ctxt->center_freq1 = chandef->center_freq1;

	ret = iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, ap,
	chains_static, chains_dynamic,
	FW_CTXT_ACTION_ADD);

	if (ret)
	return ret;

	ctxt->ref++;

	return 0;
	}

	/*
	* Update the number of references to the given PHY context. This is valid only
	* in case the PHY context was already created, i.e., its reference count > 0.
	*/
	void iwl_mvm_phy_ctxt_ref(struct iwl_mvm mvm, struct iwl_mvm_phy_ctxt ctxt)
	{
	lockdep_assert_held(&mvm->mutex);

	/* If we were taking the first ref, we should have
	* called iwl_mvm_phy_ctxt_add.
	*/
	WARN_ON(!ctxt->ref);
	ctxt->ref++;
	}

	/*
	* Send a command to modify the PHY context based on the current HW
	* configuration. Note that the function does not check that the configuration
	* changed.
	*/
	int iwl_mvm_phy_ctxt_changed(struct iwl_mvm mvm, struct iwl_mvm_phy_ctxt ctxt,
	const struct cfg80211_chan_def *chandef,
	const struct cfg80211_chan_def *ap,
	u8 chains_static, u8 chains_dynamic)
	{
	enum iwl_ctxt_action action = FW_CTXT_ACTION_MODIFY;

	lockdep_assert_held(&mvm->mutex);

	if (WARN_ON_ONCE(!ctxt->ref))
	return -EINVAL;

	if (iwl_fw_lookup_cmd_ver(mvm->fw, WIDE_ID(DATA_PATH_GROUP,
	RLC_CONFIG_CMD), 0) >= 2 &&
	ctxt->channel == chandef->chan &&
	ctxt->width == chandef->width &&
	ctxt->center_freq1 == chandef->center_freq1)
	return iwl_mvm_phy_send_rlc(mvm, ctxt, chains_static,
	chains_dynamic);

	if (fw_has_capa(&mvm->fw->ucode_capa,
	IWL_UCODE_TLV_CAPA_BINDING_CDB_SUPPORT) &&
	ctxt->channel->band != chandef->chan->band) {
	int ret;

	/* ... remove it here ...*/
	ret = iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, NULL,
	chains_static, chains_dynamic,
	FW_CTXT_ACTION_REMOVE);
	if (ret)
	return ret;

	/* ... and proceed to add it again */
	action = FW_CTXT_ACTION_ADD;
	}

	ctxt->channel = chandef->chan;
	ctxt->width = chandef->width;
	ctxt->center_freq1 = chandef->center_freq1;

	return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, ap,
	chains_static, chains_dynamic,
	action);
	}

	void iwl_mvm_phy_ctxt_unref(struct iwl_mvm mvm, struct iwl_mvm_phy_ctxt ctxt)
	{
	struct cfg80211_chan_def chandef;
	lockdep_assert_held(&mvm->mutex);

	if (WARN_ON_ONCE(!ctxt))
	return;

	ctxt->ref--;

	if (ctxt->ref)
	return;

	cfg80211_chandef_create(&chandef, ctxt->channel, NL80211_CHAN_NO_HT);

	iwl_mvm_phy_ctxt_apply(mvm, ctxt, &chandef, NULL, 1, 1,
	FW_CTXT_ACTION_REMOVE);
	}

	static void iwl_mvm_binding_iterator(void _data, u8 mac,
	struct ieee80211_vif *vif)
	{
	unsigned long *data = _data;
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

	if (!mvmvif->deflink.phy_ctxt)
	return;

	if (vif->type == NL80211_IFTYPE_STATION \|\|
	vif->type == NL80211_IFTYPE_AP)
	__set_bit(mvmvif->deflink.phy_ctxt->id, data);
	}

	int iwl_mvm_phy_ctx_count(struct iwl_mvm *mvm)
	{
	unsigned long phy_ctxt_counter = 0;

	ieee80211_iterate_active_interfaces_atomic(mvm->hw,
	IEEE80211_IFACE_ITER_NORMAL,
	iwl_mvm_binding_iterator,
	&phy_ctxt_counter);

	return hweight8(phy_ctxt_counter);
	}