[deliverable/linux.git] / drivers / net / wireless / iwlwifi / mvm / phy-ctxt.c

/******************************************************************************
 *
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
 * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
 * USA
 *
 * The full GNU General Public License is included in this distribution
 * in the file called COPYING.
 *
 * Contact Information:
 *  Intel Linux Wireless <ilw@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * BSD LICENSE
 *
 * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *  * Neither the name Intel Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *****************************************************************************/

#include <net/mac80211.h>
#include "fw-api.h"
#include "mvm.h"

/* Maps the driver specific channel width definition to the the fw values */
static inline u8 iwl_mvm_get_channel_width(struct cfg80211_chan_def *chandef)
{
	switch (chandef->width) {
	case NL80211_CHAN_WIDTH_20_NOHT:
	case NL80211_CHAN_WIDTH_20:
		return PHY_VHT_CHANNEL_MODE20;
	case NL80211_CHAN_WIDTH_40:
		return PHY_VHT_CHANNEL_MODE40;
	case NL80211_CHAN_WIDTH_80:
		return PHY_VHT_CHANNEL_MODE80;
	case NL80211_CHAN_WIDTH_160:
		return PHY_VHT_CHANNEL_MODE160;
	default:
		WARN(1, "Invalid channel width=%u", chandef->width);
		return PHY_VHT_CHANNEL_MODE20;
	}
}

/*
 * Maps the driver specific control channel position (relative to the center
 * freq) definitions to the the fw values
 */
static inline u8 iwl_mvm_get_ctrl_pos(struct cfg80211_chan_def *chandef)
{
	switch (chandef->chan->center_freq - chandef->center_freq1) {
	case -70:
		return PHY_VHT_CTRL_POS_4_BELOW;
	case -50:
		return PHY_VHT_CTRL_POS_3_BELOW;
	case -30:
		return PHY_VHT_CTRL_POS_2_BELOW;
	case -10:
		return PHY_VHT_CTRL_POS_1_BELOW;
	case  10:
		return PHY_VHT_CTRL_POS_1_ABOVE;
	case  30:
		return PHY_VHT_CTRL_POS_2_ABOVE;
	case  50:
		return PHY_VHT_CTRL_POS_3_ABOVE;
	case  70:
		return PHY_VHT_CTRL_POS_4_ABOVE;
	default:
		WARN(1, "Invalid channel definition");
	case 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 PHY_VHT_CTRL_POS_1_BELOW;
	}
}

/*
 * 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, u32 apply_time)
{
	memset(cmd, 0, sizeof(struct iwl_phy_context_cmd));

	cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(ctxt->id,
							    ctxt->color));
	cmd->action = cpu_to_le32(action);
	cmd->apply_time = cpu_to_le32(apply_time);
}

/*
 * Add the phy configuration to the PHY context command
 */
static void iwl_mvm_phy_ctxt_cmd_data(struct iwl_mvm *mvm,
				      struct iwl_phy_context_cmd *cmd,
				      struct cfg80211_chan_def *chandef,
				      u8 chains_static, u8 chains_dynamic)
{
	u8 active_cnt, idle_cnt;

	/* Set the channel info data */
	cmd->ci.band = (chandef->chan->band == IEEE80211_BAND_2GHZ ?
	      PHY_BAND_24 : PHY_BAND_5);

	cmd->ci.channel = chandef->chan->hw_value;
	cmd->ci.width = iwl_mvm_get_channel_width(chandef);
	cmd->ci.ctrl_pos = iwl_mvm_get_ctrl_pos(chandef);

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

	cmd->rxchain_info = cpu_to_le32(iwl_fw_valid_rx_ant(mvm->fw) <<
					PHY_RX_CHAIN_VALID_POS);
	cmd->rxchain_info |= cpu_to_le32(idle_cnt << PHY_RX_CHAIN_CNT_POS);
	cmd->rxchain_info |= cpu_to_le32(active_cnt <<
					 PHY_RX_CHAIN_MIMO_CNT_POS);

	cmd->txchain_info = cpu_to_le32(iwl_fw_valid_tx_ant(mvm->fw));
}

/*
 * 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,
				  struct cfg80211_chan_def *chandef,
				  u8 chains_static, u8 chains_dynamic,
				  u32 action, u32 apply_time)
{
	struct iwl_phy_context_cmd cmd;
	int ret;

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

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

	ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD, CMD_SYNC,
				   sizeof(struct iwl_phy_context_cmd),
				   &cmd);
	if (ret)
		IWL_ERR(mvm, "PHY ctxt cmd error. ret=%d\n", ret);
	return ret;
}

/*
 * 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,
			 struct cfg80211_chan_def *chandef,
			 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;
	ret = iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef,
				     chains_static, chains_dynamic,
				     FW_CTXT_ACTION_ADD, 0);

	return ret;
}

/*
 * 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);
	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,
			     struct cfg80211_chan_def *chandef,
			     u8 chains_static, u8 chains_dynamic)
{
	lockdep_assert_held(&mvm->mutex);

	ctxt->channel = chandef->chan;
	return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef,
				      chains_static, chains_dynamic,
				      FW_CTXT_ACTION_MODIFY, 0);
}

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

	if (WARN_ON_ONCE(!ctxt))
		return;

	ctxt->ref--;
}
Commit	Line	Data
8ca151b5 JB	1	/******************************************************************************
	2	*
	3	* This file is provided under a dual BSD/GPLv2 license. When using or
	4	* redistributing this file, you may do so under either license.
	5	*
	6	* GPL LICENSE SUMMARY
	7	*
	8	* Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of version 2 of the GNU General Public License as
	12	* published by the Free Software Foundation.
	13	*
	14	* This program is distributed in the hope that it will be useful, but
	15	* WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	17	* General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
	22	* USA
	23	*
	24	* The full GNU General Public License is included in this distribution
410dc5aa	25	* in the file called COPYING.
8ca151b5 JB	26	*
	27	* Contact Information:
	28	* Intel Linux Wireless <ilw@linux.intel.com>
	29	* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
	30	*
	31	* BSD LICENSE
	32	*
	33	* Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
	34	* All rights reserved.
	35	*
	36	* Redistribution and use in source and binary forms, with or without
	37	* modification, are permitted provided that the following conditions
	38	* are met:
	39	*
	40	* * Redistributions of source code must retain the above copyright
	41	* notice, this list of conditions and the following disclaimer.
	42	* * Redistributions in binary form must reproduce the above copyright
	43	* notice, this list of conditions and the following disclaimer in
	44	* the documentation and/or other materials provided with the
	45	* distribution.
	46	* * Neither the name Intel Corporation nor the names of its
	47	* contributors may be used to endorse or promote products derived
	48	* from this software without specific prior written permission.
	49	*
	50	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	51	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	52	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	53	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	54	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	55	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	56	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	57	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	58	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	59	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	60	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	61	*
	62	*****************************************************************************/
	63
	64	#include <net/mac80211.h>
	65	#include "fw-api.h"
	66	#include "mvm.h"
	67
	68	/* Maps the driver specific channel width definition to the the fw values */
	69	static inline u8 iwl_mvm_get_channel_width(struct cfg80211_chan_def *chandef)
	70	{
	71	switch (chandef->width) {
	72	case NL80211_CHAN_WIDTH_20_NOHT:
	73	case NL80211_CHAN_WIDTH_20:
	74	return PHY_VHT_CHANNEL_MODE20;
	75	case NL80211_CHAN_WIDTH_40:
	76	return PHY_VHT_CHANNEL_MODE40;
	77	case NL80211_CHAN_WIDTH_80:
	78	return PHY_VHT_CHANNEL_MODE80;
	79	case NL80211_CHAN_WIDTH_160:
	80	return PHY_VHT_CHANNEL_MODE160;
	81	default:
	82	WARN(1, "Invalid channel width=%u", chandef->width);
	83	return PHY_VHT_CHANNEL_MODE20;
	84	}
	85	}
	86
	87	/*
	88	* Maps the driver specific control channel position (relative to the center
	89	* freq) definitions to the the fw values
90	*/
91	static inline u8 iwl_mvm_get_ctrl_pos(struct cfg80211_chan_def *chandef)
92	{
93	switch (chandef->chan->center_freq - chandef->center_freq1) {
94	case -70:
95	return PHY_VHT_CTRL_POS_4_BELOW;
96	case -50:
97	return PHY_VHT_CTRL_POS_3_BELOW;
98	case -30:
99	return PHY_VHT_CTRL_POS_2_BELOW;
100	case -10:
101	return PHY_VHT_CTRL_POS_1_BELOW;
102	case 10:
103	return PHY_VHT_CTRL_POS_1_ABOVE;
104	case 30:
105	return PHY_VHT_CTRL_POS_2_ABOVE;
106	case 50:
107	return PHY_VHT_CTRL_POS_3_ABOVE;
108	case 70:
109	return PHY_VHT_CTRL_POS_4_ABOVE;
110	default:
111	WARN(1, "Invalid channel definition");
112	case 0:
113	/*
114	* The FW is expected to check the control channel position only
115	* when in HT/VHT and the channel width is not 20MHz. Return
116	* this value as the default one.
117	*/
118	return PHY_VHT_CTRL_POS_1_BELOW;
119	}
120	}
121
122	/*
123	* Construct the generic fields of the PHY context command
124	*/
125	static void iwl_mvm_phy_ctxt_cmd_hdr(struct iwl_mvm_phy_ctxt *ctxt,
126	struct iwl_phy_context_cmd *cmd,
127	u32 action, u32 apply_time)
128	{
129	memset(cmd, 0, sizeof(struct iwl_phy_context_cmd));
130
131	cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(ctxt->id,
132	ctxt->color));
133	cmd->action = cpu_to_le32(action);
134	cmd->apply_time = cpu_to_le32(apply_time);
135	}
136
137	/*
138	* Add the phy configuration to the PHY context command
139	*/
140	static void iwl_mvm_phy_ctxt_cmd_data(struct iwl_mvm *mvm,
141	struct iwl_phy_context_cmd *cmd,
142	struct cfg80211_chan_def *chandef,
143	u8 chains_static, u8 chains_dynamic)
144	{
33223542	145	u8 active_cnt, idle_cnt;
8ca151b5 JB	146
	147	/* Set the channel info data */
	148	cmd->ci.band = (chandef->chan->band == IEEE80211_BAND_2GHZ ?
	149	PHY_BAND_24 : PHY_BAND_5);
	150
	151	cmd->ci.channel = chandef->chan->hw_value;
	152	cmd->ci.width = iwl_mvm_get_channel_width(chandef);
	153	cmd->ci.ctrl_pos = iwl_mvm_get_ctrl_pos(chandef);
	154
	155	/* Set rx the chains */
8ca151b5 JB	156	idle_cnt = chains_static;
	157	active_cnt = chains_dynamic;
	158
33223542	159	cmd->rxchain_info = cpu_to_le32(iwl_fw_valid_rx_ant(mvm->fw) <<
8ca151b5 JB	160	PHY_RX_CHAIN_VALID_POS);
	161	cmd->rxchain_info \|= cpu_to_le32(idle_cnt << PHY_RX_CHAIN_CNT_POS);
	162	cmd->rxchain_info \|= cpu_to_le32(active_cnt <<
	163	PHY_RX_CHAIN_MIMO_CNT_POS);
	164
33223542	165	cmd->txchain_info = cpu_to_le32(iwl_fw_valid_tx_ant(mvm->fw));
8ca151b5 JB	166	}
	167
	168	/*
	169	* Send a command to apply the current phy configuration. The command is send
	170	* only if something in the configuration changed: in case that this is the
	171	* first time that the phy configuration is applied or in case that the phy
	172	* configuration changed from the previous apply.
	173	*/
	174	static int iwl_mvm_phy_ctxt_apply(struct iwl_mvm *mvm,
	175	struct iwl_mvm_phy_ctxt *ctxt,
	176	struct cfg80211_chan_def *chandef,
	177	u8 chains_static, u8 chains_dynamic,
	178	u32 action, u32 apply_time)
	179	{
	180	struct iwl_phy_context_cmd cmd;
	181	int ret;
	182
	183	/* Set the command header fields */
	184	iwl_mvm_phy_ctxt_cmd_hdr(ctxt, &cmd, action, apply_time);
	185
	186	/* Set the command data */
	187	iwl_mvm_phy_ctxt_cmd_data(mvm, &cmd, chandef,
	188	chains_static, chains_dynamic);
	189
	190	ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD, CMD_SYNC,
	191	sizeof(struct iwl_phy_context_cmd),
	192	&cmd);
	193	if (ret)
	194	IWL_ERR(mvm, "PHY ctxt cmd error. ret=%d\n", ret);
	195	return ret;
	196	}
	197
8ca151b5 JB	198	/*
	199	* Send a command to add a PHY context based on the current HW configuration.
	200	*/
	201	int iwl_mvm_phy_ctxt_add(struct iwl_mvm mvm, struct iwl_mvm_phy_ctxt ctxt,
	202	struct cfg80211_chan_def *chandef,
	203	u8 chains_static, u8 chains_dynamic)
	204	{
fe0f2de3	205	int ret;
8ca151b5	206
debff618 JB	207	WARN_ON(!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
debff618 JB	208	ctxt->ref);
8ca151b5	209	lockdep_assert_held(&mvm->mutex);
8ca151b5	210
fe0f2de3 IP	211	ctxt->channel = chandef->chan;
	212	ret = iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef,
	213	chains_static, chains_dynamic,
	214	FW_CTXT_ACTION_ADD, 0);
8ca151b5	215
fe0f2de3 IP	216	return ret;
fe0f2de3 IP	217	}
8ca151b5	218
fe0f2de3 IP	219	/*
	220	* Update the number of references to the given PHY context. This is valid only
	221	* in case the PHY context was already created, i.e., its reference count > 0.
	222	*/
	223	void iwl_mvm_phy_ctxt_ref(struct iwl_mvm mvm, struct iwl_mvm_phy_ctxt ctxt)
	224	{
fe0f2de3	225	lockdep_assert_held(&mvm->mutex);
fe0f2de3	226	ctxt->ref++;
8ca151b5 JB	227	}
	228
	229	/*
	230	* Send a command to modify the PHY context based on the current HW
	231	* configuration. Note that the function does not check that the configuration
	232	* changed.
	233	*/
	234	int iwl_mvm_phy_ctxt_changed(struct iwl_mvm mvm, struct iwl_mvm_phy_ctxt ctxt,
	235	struct cfg80211_chan_def *chandef,
	236	u8 chains_static, u8 chains_dynamic)
	237	{
	238	lockdep_assert_held(&mvm->mutex);
	239
	240	ctxt->channel = chandef->chan;
	241	return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef,
	242	chains_static, chains_dynamic,
	243	FW_CTXT_ACTION_MODIFY, 0);
	244	}
	245
fe0f2de3 IP	246	void iwl_mvm_phy_ctxt_unref(struct iwl_mvm mvm, struct iwl_mvm_phy_ctxt ctxt)
	247	{
	248	lockdep_assert_held(&mvm->mutex);
e2821011 JB	249
	250	if (WARN_ON_ONCE(!ctxt))
	251	return;
	252
fe0f2de3	253	ctxt->ref--;
fe0f2de3	254	}