iwl-core.c 86.1 KB
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/******************************************************************************
 *
 * GPL LICENSE SUMMARY
 *
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 * Copyright(c) 2008 - 2009 Intel Corporation. All rights reserved.
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 *
 * 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 LICENSE.GPL.
 *
 * Contact Information:
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 *  Intel Linux Wireless <ilw@linux.intel.com>
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 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *****************************************************************************/

#include <linux/kernel.h>
#include <linux/module.h>
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#include <linux/etherdevice.h>
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#include <net/mac80211.h>
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#include "iwl-eeprom.h"
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#include "iwl-dev.h" /* FIXME: remove */
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#include "iwl-debug.h"
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#include "iwl-core.h"
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#include "iwl-io.h"
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#include "iwl-rfkill.h"
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#include "iwl-power.h"
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#include "iwl-sta.h"
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#include "iwl-helpers.h"
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MODULE_DESCRIPTION("iwl core");
MODULE_VERSION(IWLWIFI_VERSION);
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MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
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MODULE_LICENSE("GPL");
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#define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np)    \
	[IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,      \
				    IWL_RATE_SISO_##s##M_PLCP, \
				    IWL_RATE_MIMO2_##s##M_PLCP,\
				    IWL_RATE_MIMO3_##s##M_PLCP,\
				    IWL_RATE_##r##M_IEEE,      \
				    IWL_RATE_##ip##M_INDEX,    \
				    IWL_RATE_##in##M_INDEX,    \
				    IWL_RATE_##rp##M_INDEX,    \
				    IWL_RATE_##rn##M_INDEX,    \
				    IWL_RATE_##pp##M_INDEX,    \
				    IWL_RATE_##np##M_INDEX }

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static irqreturn_t iwl_isr(int irq, void *data);

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/*
 * Parameter order:
 *   rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
 *
 * If there isn't a valid next or previous rate then INV is used which
 * maps to IWL_RATE_INVALID
 *
 */
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const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = {
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	IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2),    /*  1mbps */
	IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5),          /*  2mbps */
	IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
	IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18),      /* 11mbps */
	IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
	IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11),       /*  9mbps */
	IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
	IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
	IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
	IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
	IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
	IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
	IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
	/* FIXME:RS:          ^^    should be INV (legacy) */
};
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EXPORT_SYMBOL(iwl_rates);
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/**
 * translate ucode response to mac80211 tx status control values
 */
void iwl_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
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				  struct ieee80211_tx_info *info)
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{
	int rate_index;
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	struct ieee80211_tx_rate *r = &info->control.rates[0];
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	info->antenna_sel_tx =
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		((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
	if (rate_n_flags & RATE_MCS_HT_MSK)
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		r->flags |= IEEE80211_TX_RC_MCS;
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	if (rate_n_flags & RATE_MCS_GF_MSK)
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		r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
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	if (rate_n_flags & RATE_MCS_FAT_MSK)
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		r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
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	if (rate_n_flags & RATE_MCS_DUP_MSK)
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		r->flags |= IEEE80211_TX_RC_DUP_DATA;
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	if (rate_n_flags & RATE_MCS_SGI_MSK)
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		r->flags |= IEEE80211_TX_RC_SHORT_GI;
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	rate_index = iwl_hwrate_to_plcp_idx(rate_n_flags);
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	if (info->band == IEEE80211_BAND_5GHZ)
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		rate_index -= IWL_FIRST_OFDM_RATE;
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	r->idx = rate_index;
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}
EXPORT_SYMBOL(iwl_hwrate_to_tx_control);

int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
{
	int idx = 0;

	/* HT rate format */
	if (rate_n_flags & RATE_MCS_HT_MSK) {
		idx = (rate_n_flags & 0xff);

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		if (idx >= IWL_RATE_MIMO3_6M_PLCP)
			idx = idx - IWL_RATE_MIMO3_6M_PLCP;
		else if (idx >= IWL_RATE_MIMO2_6M_PLCP)
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			idx = idx - IWL_RATE_MIMO2_6M_PLCP;

		idx += IWL_FIRST_OFDM_RATE;
		/* skip 9M not supported in ht*/
		if (idx >= IWL_RATE_9M_INDEX)
			idx += 1;
		if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
			return idx;

	/* legacy rate format, search for match in table */
	} else {
		for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
			if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
				return idx;
	}

	return -1;
}
EXPORT_SYMBOL(iwl_hwrate_to_plcp_idx);

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u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant)
{
	int i;
	u8 ind = ant;
	for (i = 0; i < RATE_ANT_NUM - 1; i++) {
		ind = (ind + 1) < RATE_ANT_NUM ?  ind + 1 : 0;
		if (priv->hw_params.valid_tx_ant & BIT(ind))
			return ind;
	}
	return ant;
}
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const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
EXPORT_SYMBOL(iwl_bcast_addr);


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/* This function both allocates and initializes hw and priv. */
struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
		struct ieee80211_ops *hw_ops)
{
	struct iwl_priv *priv;

	/* mac80211 allocates memory for this device instance, including
	 *   space for this driver's private structure */
	struct ieee80211_hw *hw =
		ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
	if (hw == NULL) {
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		printk(KERN_ERR "%s: Can not allocate network device\n",
		       cfg->name);
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		goto out;
	}

	priv = hw->priv;
	priv->hw = hw;

out:
	return hw;
}
EXPORT_SYMBOL(iwl_alloc_all);

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void iwl_hw_detect(struct iwl_priv *priv)
{
	priv->hw_rev = _iwl_read32(priv, CSR_HW_REV);
	priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG);
	pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &priv->rev_id);
}
EXPORT_SYMBOL(iwl_hw_detect);

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int iwl_hw_nic_init(struct iwl_priv *priv)
{
	unsigned long flags;
	struct iwl_rx_queue *rxq = &priv->rxq;
	int ret;

	/* nic_init */
	spin_lock_irqsave(&priv->lock, flags);
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	priv->cfg->ops->lib->apm_ops.init(priv);
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	iwl_write32(priv, CSR_INT_COALESCING, 512 / 32);
	spin_unlock_irqrestore(&priv->lock, flags);

	ret = priv->cfg->ops->lib->apm_ops.set_pwr_src(priv, IWL_PWR_SRC_VMAIN);

	priv->cfg->ops->lib->apm_ops.config(priv);

	/* Allocate the RX queue, or reset if it is already allocated */
	if (!rxq->bd) {
		ret = iwl_rx_queue_alloc(priv);
		if (ret) {
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			IWL_ERR(priv, "Unable to initialize Rx queue\n");
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			return -ENOMEM;
		}
	} else
		iwl_rx_queue_reset(priv, rxq);

	iwl_rx_replenish(priv);

	iwl_rx_init(priv, rxq);

	spin_lock_irqsave(&priv->lock, flags);

	rxq->need_update = 1;
	iwl_rx_queue_update_write_ptr(priv, rxq);

	spin_unlock_irqrestore(&priv->lock, flags);

	/* Allocate and init all Tx and Command queues */
	ret = iwl_txq_ctx_reset(priv);
	if (ret)
		return ret;

	set_bit(STATUS_INIT, &priv->status);

	return 0;
}
EXPORT_SYMBOL(iwl_hw_nic_init);

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/*
 * QoS  support
*/
void iwl_activate_qos(struct iwl_priv *priv, u8 force)
{
	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return;

	priv->qos_data.def_qos_parm.qos_flags = 0;

	if (priv->qos_data.qos_cap.q_AP.queue_request &&
	    !priv->qos_data.qos_cap.q_AP.txop_request)
		priv->qos_data.def_qos_parm.qos_flags |=
			QOS_PARAM_FLG_TXOP_TYPE_MSK;
	if (priv->qos_data.qos_active)
		priv->qos_data.def_qos_parm.qos_flags |=
			QOS_PARAM_FLG_UPDATE_EDCA_MSK;

	if (priv->current_ht_config.is_ht)
		priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;

	if (force || iwl_is_associated(priv)) {
		IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
				priv->qos_data.qos_active,
				priv->qos_data.def_qos_parm.qos_flags);

		iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM,
				       sizeof(struct iwl_qosparam_cmd),
				       &priv->qos_data.def_qos_parm, NULL);
	}
}
EXPORT_SYMBOL(iwl_activate_qos);

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/*
 * AC        CWmin         CW max      AIFSN      TXOP Limit    TXOP Limit
 *                                              (802.11b)      (802.11a/g)
 * AC_BK      15            1023        7           0               0
 * AC_BE      15            1023        3           0               0
 * AC_VI       7              15        2          6.016ms       3.008ms
 * AC_VO       3               7        2          3.264ms       1.504ms
 */
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void iwl_reset_qos(struct iwl_priv *priv)
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{
	u16 cw_min = 15;
	u16 cw_max = 1023;
	u8 aifs = 2;
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	bool is_legacy = false;
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	unsigned long flags;
	int i;

	spin_lock_irqsave(&priv->lock, flags);
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	/* QoS always active in AP and ADHOC mode
	 * In STA mode wait for association
	 */
	if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
	    priv->iw_mode == NL80211_IFTYPE_AP)
		priv->qos_data.qos_active = 1;
	else
		priv->qos_data.qos_active = 0;
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	/* check for legacy mode */
	if ((priv->iw_mode == NL80211_IFTYPE_ADHOC &&
	    (priv->active_rate & IWL_OFDM_RATES_MASK) == 0) ||
	    (priv->iw_mode == NL80211_IFTYPE_STATION &&
	    (priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK) == 0)) {
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		cw_min = 31;
		is_legacy = 1;
	}

	if (priv->qos_data.qos_active)
		aifs = 3;

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	/* AC_BE */
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	priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
	priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
	priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
	priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
	priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;

	if (priv->qos_data.qos_active) {
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		/* AC_BK */
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		i = 1;
		priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
		priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
		priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
		priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
		priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;

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		/* AC_VI */
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		i = 2;
		priv->qos_data.def_qos_parm.ac[i].cw_min =
			cpu_to_le16((cw_min + 1) / 2 - 1);
		priv->qos_data.def_qos_parm.ac[i].cw_max =
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			cpu_to_le16(cw_min);
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		priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
		if (is_legacy)
			priv->qos_data.def_qos_parm.ac[i].edca_txop =
				cpu_to_le16(6016);
		else
			priv->qos_data.def_qos_parm.ac[i].edca_txop =
				cpu_to_le16(3008);
		priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;

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		/* AC_VO */
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		i = 3;
		priv->qos_data.def_qos_parm.ac[i].cw_min =
			cpu_to_le16((cw_min + 1) / 4 - 1);
		priv->qos_data.def_qos_parm.ac[i].cw_max =
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			cpu_to_le16((cw_min + 1) / 2 - 1);
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		priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
		priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
		if (is_legacy)
			priv->qos_data.def_qos_parm.ac[i].edca_txop =
				cpu_to_le16(3264);
		else
			priv->qos_data.def_qos_parm.ac[i].edca_txop =
				cpu_to_le16(1504);
	} else {
		for (i = 1; i < 4; i++) {
			priv->qos_data.def_qos_parm.ac[i].cw_min =
				cpu_to_le16(cw_min);
			priv->qos_data.def_qos_parm.ac[i].cw_max =
				cpu_to_le16(cw_max);
			priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
			priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
			priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
		}
	}
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	IWL_DEBUG_QOS(priv, "set QoS to default \n");
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	spin_unlock_irqrestore(&priv->lock, flags);
}
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EXPORT_SYMBOL(iwl_reset_qos);

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#define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
#define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
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static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
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			      struct ieee80211_sta_ht_cap *ht_info,
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			      enum ieee80211_band band)
{
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	u16 max_bit_rate = 0;
	u8 rx_chains_num = priv->hw_params.rx_chains_num;
	u8 tx_chains_num = priv->hw_params.tx_chains_num;

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	ht_info->cap = 0;
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	memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
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	ht_info->ht_supported = true;
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	ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
	ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
	ht_info->cap |= (IEEE80211_HT_CAP_SM_PS &
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			     (WLAN_HT_CAP_SM_PS_DISABLED << 2));
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	max_bit_rate = MAX_BIT_RATE_20_MHZ;
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	if (priv->hw_params.fat_channel & BIT(band)) {
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		ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
		ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
		ht_info->mcs.rx_mask[4] = 0x01;
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		max_bit_rate = MAX_BIT_RATE_40_MHZ;
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	}

	if (priv->cfg->mod_params->amsdu_size_8K)
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		ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
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	ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
	ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;

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	ht_info->mcs.rx_mask[0] = 0xFF;
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	if (rx_chains_num >= 2)
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		ht_info->mcs.rx_mask[1] = 0xFF;
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	if (rx_chains_num >= 3)
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		ht_info->mcs.rx_mask[2] = 0xFF;
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	/* Highest supported Rx data rate */
	max_bit_rate *= rx_chains_num;
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	WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
	ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
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	/* Tx MCS capabilities */
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	ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
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	if (tx_chains_num != rx_chains_num) {
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		ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
		ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
				IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
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	}
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}

static void iwlcore_init_hw_rates(struct iwl_priv *priv,
			      struct ieee80211_rate *rates)
{
	int i;

	for (i = 0; i < IWL_RATE_COUNT; i++) {
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		rates[i].bitrate = iwl_rates[i].ieee * 5;
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		rates[i].hw_value = i; /* Rate scaling will work on indexes */
		rates[i].hw_value_short = i;
		rates[i].flags = 0;
		if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
			/*
			 * If CCK != 1M then set short preamble rate flag.
			 */
			rates[i].flags |=
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				(iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
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					0 : IEEE80211_RATE_SHORT_PREAMBLE;
		}
	}
}

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/**
 * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
 */
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int iwlcore_init_geos(struct iwl_priv *priv)
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{
	struct iwl_channel_info *ch;
	struct ieee80211_supported_band *sband;
	struct ieee80211_channel *channels;
	struct ieee80211_channel *geo_ch;
	struct ieee80211_rate *rates;
	int i = 0;

	if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
	    priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
470
		IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
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Ron Rindjunsky 已提交
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		set_bit(STATUS_GEO_CONFIGURED, &priv->status);
		return 0;
	}

	channels = kzalloc(sizeof(struct ieee80211_channel) *
			   priv->channel_count, GFP_KERNEL);
	if (!channels)
		return -ENOMEM;

	rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
			GFP_KERNEL);
	if (!rates) {
		kfree(channels);
		return -ENOMEM;
	}

	/* 5.2GHz channels start after the 2.4GHz channels */
	sband = &priv->bands[IEEE80211_BAND_5GHZ];
	sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
	/* just OFDM */
	sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
	sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;

494
	if (priv->cfg->sku & IWL_SKU_N)
J
Johannes Berg 已提交
495
		iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
496
					 IEEE80211_BAND_5GHZ);
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Ron Rindjunsky 已提交
497 498 499 500 501 502 503

	sband = &priv->bands[IEEE80211_BAND_2GHZ];
	sband->channels = channels;
	/* OFDM & CCK */
	sband->bitrates = rates;
	sband->n_bitrates = IWL_RATE_COUNT;

504
	if (priv->cfg->sku & IWL_SKU_N)
J
Johannes Berg 已提交
505
		iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
506
					 IEEE80211_BAND_2GHZ);
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Ron Rindjunsky 已提交
507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540

	priv->ieee_channels = channels;
	priv->ieee_rates = rates;

	for (i = 0;  i < priv->channel_count; i++) {
		ch = &priv->channel_info[i];

		/* FIXME: might be removed if scan is OK */
		if (!is_channel_valid(ch))
			continue;

		if (is_channel_a_band(ch))
			sband =  &priv->bands[IEEE80211_BAND_5GHZ];
		else
			sband =  &priv->bands[IEEE80211_BAND_2GHZ];

		geo_ch = &sband->channels[sband->n_channels++];

		geo_ch->center_freq =
				ieee80211_channel_to_frequency(ch->channel);
		geo_ch->max_power = ch->max_power_avg;
		geo_ch->max_antenna_gain = 0xff;
		geo_ch->hw_value = ch->channel;

		if (is_channel_valid(ch)) {
			if (!(ch->flags & EEPROM_CHANNEL_IBSS))
				geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;

			if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
				geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;

			if (ch->flags & EEPROM_CHANNEL_RADAR)
				geo_ch->flags |= IEEE80211_CHAN_RADAR;

541
			geo_ch->flags |= ch->fat_extension_channel;
542

543 544
			if (ch->max_power_avg > priv->tx_power_channel_lmt)
				priv->tx_power_channel_lmt = ch->max_power_avg;
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Ron Rindjunsky 已提交
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		} else {
			geo_ch->flags |= IEEE80211_CHAN_DISABLED;
		}

		/* Save flags for reg domain usage */
		geo_ch->orig_flags = geo_ch->flags;

552
		IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
R
Ron Rindjunsky 已提交
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				ch->channel, geo_ch->center_freq,
				is_channel_a_band(ch) ?  "5.2" : "2.4",
				geo_ch->flags & IEEE80211_CHAN_DISABLED ?
				"restricted" : "valid",
				 geo_ch->flags);
	}

	if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
	     priv->cfg->sku & IWL_SKU_A) {
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Tomas Winkler 已提交
562 563
		IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
			"Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
564 565
			   priv->pci_dev->device,
			   priv->pci_dev->subsystem_device);
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Ron Rindjunsky 已提交
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		priv->cfg->sku &= ~IWL_SKU_A;
	}

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Tomas Winkler 已提交
569
	IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
570 571
		   priv->bands[IEEE80211_BAND_2GHZ].n_channels,
		   priv->bands[IEEE80211_BAND_5GHZ].n_channels);
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Ron Rindjunsky 已提交
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	set_bit(STATUS_GEO_CONFIGURED, &priv->status);

	return 0;
}
577
EXPORT_SYMBOL(iwlcore_init_geos);
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Ron Rindjunsky 已提交
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/*
 * iwlcore_free_geos - undo allocations in iwlcore_init_geos
 */
582
void iwlcore_free_geos(struct iwl_priv *priv)
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Ron Rindjunsky 已提交
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{
	kfree(priv->ieee_channels);
	kfree(priv->ieee_rates);
	clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
}
588
EXPORT_SYMBOL(iwlcore_free_geos);
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Ron Rindjunsky 已提交
589

590
static bool is_single_rx_stream(struct iwl_priv *priv)
R
Ron Rindjunsky 已提交
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{
	return !priv->current_ht_config.is_ht ||
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	       ((priv->current_ht_config.mcs.rx_mask[1] == 0) &&
		(priv->current_ht_config.mcs.rx_mask[2] == 0));
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Ron Rindjunsky 已提交
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}
596

597 598 599 600 601 602 603 604 605 606
static u8 iwl_is_channel_extension(struct iwl_priv *priv,
				   enum ieee80211_band band,
				   u16 channel, u8 extension_chan_offset)
{
	const struct iwl_channel_info *ch_info;

	ch_info = iwl_get_channel_info(priv, band, channel);
	if (!is_channel_valid(ch_info))
		return 0;

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Johannes Berg 已提交
607
	if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
608
		return !(ch_info->fat_extension_channel &
609
					IEEE80211_CHAN_NO_HT40PLUS);
J
Johannes Berg 已提交
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	else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
611
		return !(ch_info->fat_extension_channel &
612
					IEEE80211_CHAN_NO_HT40MINUS);
613 614 615 616 617

	return 0;
}

u8 iwl_is_fat_tx_allowed(struct iwl_priv *priv,
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Johannes Berg 已提交
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			 struct ieee80211_sta_ht_cap *sta_ht_inf)
619 620 621 622
{
	struct iwl_ht_info *iwl_ht_conf = &priv->current_ht_config;

	if ((!iwl_ht_conf->is_ht) ||
623
	    (iwl_ht_conf->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ))
624 625
		return 0;

626 627 628
	/* We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
	 * the bit will not set if it is pure 40MHz case
	 */
629
	if (sta_ht_inf) {
630
		if (!sta_ht_inf->ht_supported)
631 632 633
			return 0;
	}

634 635 636 637 638 639
	if (iwl_ht_conf->ht_protection & IEEE80211_HT_OP_MODE_PROTECTION_20MHZ)
		return 1;
	else
		return iwl_is_channel_extension(priv, priv->band,
				le16_to_cpu(priv->staging_rxon.channel),
				iwl_ht_conf->extension_chan_offset);
640 641 642
}
EXPORT_SYMBOL(iwl_is_fat_tx_allowed);

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void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
{
	struct iwl_rxon_cmd *rxon = &priv->staging_rxon;

	if (hw_decrypt)
		rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
	else
		rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;

}
EXPORT_SYMBOL(iwl_set_rxon_hwcrypto);

/**
 * iwl_check_rxon_cmd - validate RXON structure is valid
 *
 * NOTE:  This is really only useful during development and can eventually
 * be #ifdef'd out once the driver is stable and folks aren't actively
 * making changes
 */
int iwl_check_rxon_cmd(struct iwl_priv *priv)
{
	int error = 0;
	int counter = 1;
	struct iwl_rxon_cmd *rxon = &priv->staging_rxon;

	if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
		error |= le32_to_cpu(rxon->flags &
				(RXON_FLG_TGJ_NARROW_BAND_MSK |
				 RXON_FLG_RADAR_DETECT_MSK));
		if (error)
			IWL_WARN(priv, "check 24G fields %d | %d\n",
				    counter++, error);
	} else {
		error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
				0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
		if (error)
			IWL_WARN(priv, "check 52 fields %d | %d\n",
				    counter++, error);
		error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
		if (error)
			IWL_WARN(priv, "check 52 CCK %d | %d\n",
				    counter++, error);
	}
	error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
	if (error)
		IWL_WARN(priv, "check mac addr %d | %d\n", counter++, error);

	/* make sure basic rates 6Mbps and 1Mbps are supported */
	error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
		  ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
	if (error)
		IWL_WARN(priv, "check basic rate %d | %d\n", counter++, error);

	error |= (le16_to_cpu(rxon->assoc_id) > 2007);
	if (error)
		IWL_WARN(priv, "check assoc id %d | %d\n", counter++, error);

	error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
			== (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
	if (error)
		IWL_WARN(priv, "check CCK and short slot %d | %d\n",
			    counter++, error);

	error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
			== (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
	if (error)
		IWL_WARN(priv, "check CCK & auto detect %d | %d\n",
			    counter++, error);

	error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
			RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
	if (error)
		IWL_WARN(priv, "check TGG and auto detect %d | %d\n",
			    counter++, error);

	if (error)
		IWL_WARN(priv, "Tuning to channel %d\n",
			    le16_to_cpu(rxon->channel));

	if (error) {
		IWL_ERR(priv, "Not a valid iwl_rxon_assoc_cmd field values\n");
		return -1;
	}
	return 0;
}
EXPORT_SYMBOL(iwl_check_rxon_cmd);

/**
 * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 * @priv: staging_rxon is compared to active_rxon
 *
 * If the RXON structure is changing enough to require a new tune,
 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 */
int iwl_full_rxon_required(struct iwl_priv *priv)
{

	/* These items are only settable from the full RXON command */
	if (!(iwl_is_associated(priv)) ||
	    compare_ether_addr(priv->staging_rxon.bssid_addr,
			       priv->active_rxon.bssid_addr) ||
	    compare_ether_addr(priv->staging_rxon.node_addr,
			       priv->active_rxon.node_addr) ||
	    compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
			       priv->active_rxon.wlap_bssid_addr) ||
	    (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
	    (priv->staging_rxon.channel != priv->active_rxon.channel) ||
	    (priv->staging_rxon.air_propagation !=
	     priv->active_rxon.air_propagation) ||
	    (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
	     priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
	    (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
	     priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
757 758
	    (priv->staging_rxon.ofdm_ht_triple_stream_basic_rates !=
	     priv->active_rxon.ofdm_ht_triple_stream_basic_rates) ||
759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805
	    (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
		return 1;

	/* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
	 * be updated with the RXON_ASSOC command -- however only some
	 * flag transitions are allowed using RXON_ASSOC */

	/* Check if we are not switching bands */
	if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
	    (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
		return 1;

	/* Check if we are switching association toggle */
	if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
		(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
		return 1;

	return 0;
}
EXPORT_SYMBOL(iwl_full_rxon_required);

u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv)
{
	int i;
	int rate_mask;

	/* Set rate mask*/
	if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
		rate_mask = priv->active_rate_basic & IWL_CCK_RATES_MASK;
	else
		rate_mask = priv->active_rate_basic & IWL_OFDM_RATES_MASK;

	/* Find lowest valid rate */
	for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
					i = iwl_rates[i].next_ieee) {
		if (rate_mask & (1 << i))
			return iwl_rates[i].plcp;
	}

	/* No valid rate was found. Assign the lowest one */
	if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
		return IWL_RATE_1M_PLCP;
	else
		return IWL_RATE_6M_PLCP;
}
EXPORT_SYMBOL(iwl_rate_get_lowest_plcp);

806 807
void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_info *ht_info)
{
G
Gregory Greenman 已提交
808
	struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
809

810
	if (!ht_info->is_ht) {
811
		rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
812 813 814
			RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
			RXON_FLG_FAT_PROT_MSK |
			RXON_FLG_HT_PROT_MSK);
815
		return;
816
	}
817

818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851
	/* FIXME: if the definition of ht_protection changed, the "translation"
	 * will be needed for rxon->flags
	 */
	rxon->flags |= cpu_to_le32(ht_info->ht_protection << RXON_FLG_HT_OPERATING_MODE_POS);

	/* Set up channel bandwidth:
	 * 20 MHz only, 20/40 mixed or pure 40 if fat ok */
	/* clear the HT channel mode before set the mode */
	rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
			 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
	if (iwl_is_fat_tx_allowed(priv, NULL)) {
		/* pure 40 fat */
		if (rxon->flags & RXON_FLG_FAT_PROT_MSK)
			rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
		else {
			/* Note: control channel is opposite of extension channel */
			switch (ht_info->extension_chan_offset) {
			case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
				rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
				rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
				break;
			case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
				rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
				rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
				break;
			case IEEE80211_HT_PARAM_CHA_SEC_NONE:
			default:
				/* channel location only valid if in Mixed mode */
				IWL_ERR(priv, "invalid extension channel offset\n");
				break;
			}
		}
	} else {
		rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
852 853
	}

854 855
	if (priv->cfg->ops->hcmd->set_rxon_chain)
		priv->cfg->ops->hcmd->set_rxon_chain(priv);
856

857
	IWL_DEBUG_ASSOC(priv, "supported HT rate 0x%X 0x%X 0x%X "
858
			"rxon flags 0x%X operation mode :0x%X "
J
Johannes Berg 已提交
859
			"extension channel offset 0x%x\n",
J
Johannes Berg 已提交
860 861 862
			ht_info->mcs.rx_mask[0],
			ht_info->mcs.rx_mask[1],
			ht_info->mcs.rx_mask[2],
863
			le32_to_cpu(rxon->flags), ht_info->ht_protection,
J
Johannes Berg 已提交
864
			ht_info->extension_chan_offset);
865 866 867 868
	return;
}
EXPORT_SYMBOL(iwl_set_rxon_ht);

869 870 871 872 873 874
#define IWL_NUM_RX_CHAINS_MULTIPLE	3
#define IWL_NUM_RX_CHAINS_SINGLE	2
#define IWL_NUM_IDLE_CHAINS_DUAL	2
#define IWL_NUM_IDLE_CHAINS_SINGLE	1

/* Determine how many receiver/antenna chains to use.
R
Ron Rindjunsky 已提交
875 876 877 878
 * More provides better reception via diversity.  Fewer saves power.
 * MIMO (dual stream) requires at least 2, but works better with 3.
 * This does not determine *which* chains to use, just how many.
 */
879
static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
R
Ron Rindjunsky 已提交
880
{
881 882
	bool is_single = is_single_rx_stream(priv);
	bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
R
Ron Rindjunsky 已提交
883 884

	/* # of Rx chains to use when expecting MIMO. */
885 886
	if (is_single || (!is_cam && (priv->current_ht_config.sm_ps ==
						 WLAN_HT_CAP_SM_PS_STATIC)))
887
		return IWL_NUM_RX_CHAINS_SINGLE;
R
Ron Rindjunsky 已提交
888
	else
889
		return IWL_NUM_RX_CHAINS_MULTIPLE;
890
}
R
Ron Rindjunsky 已提交
891

892 893 894 895
static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
{
	int idle_cnt;
	bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
R
Ron Rindjunsky 已提交
896
	/* # Rx chains when idling and maybe trying to save power */
897
	switch (priv->current_ht_config.sm_ps) {
898 899
	case WLAN_HT_CAP_SM_PS_STATIC:
	case WLAN_HT_CAP_SM_PS_DYNAMIC:
900 901
		idle_cnt = (is_cam) ? IWL_NUM_IDLE_CHAINS_DUAL :
					IWL_NUM_IDLE_CHAINS_SINGLE;
R
Ron Rindjunsky 已提交
902
		break;
903
	case WLAN_HT_CAP_SM_PS_DISABLED:
904
		idle_cnt = (is_cam) ? active_cnt : IWL_NUM_IDLE_CHAINS_SINGLE;
R
Ron Rindjunsky 已提交
905
		break;
906
	case WLAN_HT_CAP_SM_PS_INVALID:
R
Ron Rindjunsky 已提交
907
	default:
908
		IWL_ERR(priv, "invalid mimo ps mode %d\n",
909
			   priv->current_ht_config.sm_ps);
910 911
		WARN_ON(1);
		idle_cnt = -1;
R
Ron Rindjunsky 已提交
912 913
		break;
	}
914
	return idle_cnt;
R
Ron Rindjunsky 已提交
915 916
}

917 918 919 920 921 922 923 924 925 926 927
/* up to 4 chains */
static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
{
	u8 res;
	res = (chain_bitmap & BIT(0)) >> 0;
	res += (chain_bitmap & BIT(1)) >> 1;
	res += (chain_bitmap & BIT(2)) >> 2;
	res += (chain_bitmap & BIT(4)) >> 4;
	return res;
}

928 929 930 931 932 933 934
/**
 * iwl_is_monitor_mode - Determine if interface in monitor mode
 *
 * priv->iw_mode is set in add_interface, but add_interface is
 * never called for monitor mode. The only way mac80211 informs us about
 * monitor mode is through configuring filters (call to configure_filter).
 */
935
bool iwl_is_monitor_mode(struct iwl_priv *priv)
936 937 938
{
	return !!(priv->staging_rxon.filter_flags & RXON_FILTER_PROMISC_MSK);
}
939
EXPORT_SYMBOL(iwl_is_monitor_mode);
940

R
Ron Rindjunsky 已提交
941 942 943 944 945 946 947 948
/**
 * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
 *
 * Selects how many and which Rx receivers/antennas/chains to use.
 * This should not be used for scan command ... it puts data in wrong place.
 */
void iwl_set_rxon_chain(struct iwl_priv *priv)
{
949 950
	bool is_single = is_single_rx_stream(priv);
	bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
951 952
	u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
	u32 active_chains;
953
	u16 rx_chain;
R
Ron Rindjunsky 已提交
954 955 956 957 958

	/* Tell uCode which antennas are actually connected.
	 * Before first association, we assume all antennas are connected.
	 * Just after first association, iwl_chain_noise_calibration()
	 *    checks which antennas actually *are* connected. */
959 960 961 962 963 964
	 if (priv->chain_noise_data.active_chains)
		active_chains = priv->chain_noise_data.active_chains;
	else
		active_chains = priv->hw_params.valid_rx_ant;

	rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
R
Ron Rindjunsky 已提交
965 966

	/* How many receivers should we use? */
967 968 969 970
	active_rx_cnt = iwl_get_active_rx_chain_count(priv);
	idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);


971 972 973 974 975 976 977 978 979
	/* correct rx chain count according hw settings
	 * and chain noise calibration
	 */
	valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
	if (valid_rx_cnt < active_rx_cnt)
		active_rx_cnt = valid_rx_cnt;

	if (valid_rx_cnt < idle_rx_cnt)
		idle_rx_cnt = valid_rx_cnt;
980 981 982 983

	rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
	rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;

984 985 986 987 988 989 990
	/* copied from 'iwl_bg_request_scan()' */
	/* Force use of chains B and C (0x6) for Rx for 4965
	 * Avoid A (0x1) because of its off-channel reception on A-band.
	 * MIMO is not used here, but value is required */
	if (iwl_is_monitor_mode(priv) &&
	    !(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) &&
	    ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965)) {
991 992 993 994
		rx_chain = ANT_ABC << RXON_RX_CHAIN_VALID_POS;
		rx_chain |= ANT_BC << RXON_RX_CHAIN_FORCE_SEL_POS;
		rx_chain |= ANT_ABC << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
		rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
995 996
	}

997 998
	priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain);

999
	if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
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Ron Rindjunsky 已提交
1000 1001 1002 1003
		priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
	else
		priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;

1004
	IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
1005 1006 1007 1008 1009
			priv->staging_rxon.rx_chain,
			active_rx_cnt, idle_rx_cnt);

	WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
		active_rx_cnt < idle_rx_cnt);
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Ron Rindjunsky 已提交
1010 1011
}
EXPORT_SYMBOL(iwl_set_rxon_chain);
1012 1013

/**
1014
 * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
1015 1016 1017 1018 1019 1020 1021 1022
 * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 * @channel: Any channel valid for the requested phymode

 * In addition to setting the staging RXON, priv->phymode is also set.
 *
 * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 * in the staging RXON flag structure based on the phymode
 */
1023
int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
1024
{
1025 1026 1027
	enum ieee80211_band band = ch->band;
	u16 channel = ieee80211_frequency_to_channel(ch->center_freq);

1028
	if (!iwl_get_channel_info(priv, band, channel)) {
1029
		IWL_DEBUG_INFO(priv, "Could not set channel to %d [%d]\n",
1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045
			       channel, band);
		return -EINVAL;
	}

	if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
	    (priv->band == band))
		return 0;

	priv->staging_rxon.channel = cpu_to_le16(channel);
	if (band == IEEE80211_BAND_5GHZ)
		priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
	else
		priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;

	priv->band = band;

1046
	IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
1047 1048 1049

	return 0;
}
R
Ron Rindjunsky 已提交
1050
EXPORT_SYMBOL(iwl_set_rxon_channel);
1051

1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140
void iwl_set_flags_for_band(struct iwl_priv *priv,
			    enum ieee80211_band band)
{
	if (band == IEEE80211_BAND_5GHZ) {
		priv->staging_rxon.flags &=
		    ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
		      | RXON_FLG_CCK_MSK);
		priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
	} else {
		/* Copied from iwl_post_associate() */
		if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
			priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
		else
			priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;

		if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
			priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;

		priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
		priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
		priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
	}
}
EXPORT_SYMBOL(iwl_set_flags_for_band);

/*
 * initialize rxon structure with default values from eeprom
 */
void iwl_connection_init_rx_config(struct iwl_priv *priv, int mode)
{
	const struct iwl_channel_info *ch_info;

	memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));

	switch (mode) {
	case NL80211_IFTYPE_AP:
		priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
		break;

	case NL80211_IFTYPE_STATION:
		priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
		priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
		break;

	case NL80211_IFTYPE_ADHOC:
		priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
		priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
		priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
						  RXON_FILTER_ACCEPT_GRP_MSK;
		break;

	default:
		IWL_ERR(priv, "Unsupported interface type %d\n", mode);
		break;
	}

#if 0
	/* TODO:  Figure out when short_preamble would be set and cache from
	 * that */
	if (!hw_to_local(priv->hw)->short_preamble)
		priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
	else
		priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
#endif

	ch_info = iwl_get_channel_info(priv, priv->band,
				       le16_to_cpu(priv->active_rxon.channel));

	if (!ch_info)
		ch_info = &priv->channel_info[0];

	/*
	 * in some case A channels are all non IBSS
	 * in this case force B/G channel
	 */
	if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) &&
	    !(is_channel_ibss(ch_info)))
		ch_info = &priv->channel_info[0];

	priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
	priv->band = ch_info->band;

	iwl_set_flags_for_band(priv, priv->band);

	priv->staging_rxon.ofdm_basic_rates =
	    (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
	priv->staging_rxon.cck_basic_rates =
	    (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;

1141 1142 1143
	/* clear both MIX and PURE40 mode flag */
	priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
					RXON_FLG_CHANNEL_MODE_PURE_40);
1144 1145 1146 1147
	memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
	memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
	priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
	priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1148
	priv->staging_rxon.ofdm_ht_triple_stream_basic_rates = 0xff;
1149 1150 1151
}
EXPORT_SYMBOL(iwl_connection_init_rx_config);

1152
static void iwl_set_rate(struct iwl_priv *priv)
1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172
{
	const struct ieee80211_supported_band *hw = NULL;
	struct ieee80211_rate *rate;
	int i;

	hw = iwl_get_hw_mode(priv, priv->band);
	if (!hw) {
		IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
		return;
	}

	priv->active_rate = 0;
	priv->active_rate_basic = 0;

	for (i = 0; i < hw->n_bitrates; i++) {
		rate = &(hw->bitrates[i]);
		if (rate->hw_value < IWL_RATE_COUNT)
			priv->active_rate |= (1 << rate->hw_value);
	}

1173
	IWL_DEBUG_RATE(priv, "Set active_rate = %0x, active_rate_basic = %0x\n",
1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203
		       priv->active_rate, priv->active_rate_basic);

	/*
	 * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
	 * otherwise set it to the default of all CCK rates and 6, 12, 24 for
	 * OFDM
	 */
	if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
		priv->staging_rxon.cck_basic_rates =
		    ((priv->active_rate_basic &
		      IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
	else
		priv->staging_rxon.cck_basic_rates =
		    (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;

	if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
		priv->staging_rxon.ofdm_basic_rates =
		    ((priv->active_rate_basic &
		      (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
		      IWL_FIRST_OFDM_RATE) & 0xFF;
	else
		priv->staging_rxon.ofdm_basic_rates =
		   (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
}

void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
{
	struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
	struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
	struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
1204
	IWL_DEBUG_11H(priv, "CSA notif: channel %d, status %d\n",
1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215
		      le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
	rxon->channel = csa->channel;
	priv->staging_rxon.channel = csa->channel;
}
EXPORT_SYMBOL(iwl_rx_csa);

#ifdef CONFIG_IWLWIFI_DEBUG
static void iwl_print_rx_config_cmd(struct iwl_priv *priv)
{
	struct iwl_rxon_cmd *rxon = &priv->staging_rxon;

1216
	IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
1217
	iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1218 1219 1220
	IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
	IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
	IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
1221
			le32_to_cpu(rxon->filter_flags));
1222 1223
	IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
	IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
1224
			rxon->ofdm_basic_rates);
1225 1226 1227 1228
	IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
	IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
	IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
	IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257
}
#endif

/**
 * iwl_irq_handle_error - called for HW or SW error interrupt from card
 */
void iwl_irq_handle_error(struct iwl_priv *priv)
{
	/* Set the FW error flag -- cleared on iwl_down */
	set_bit(STATUS_FW_ERROR, &priv->status);

	/* Cancel currently queued command. */
	clear_bit(STATUS_HCMD_ACTIVE, &priv->status);

#ifdef CONFIG_IWLWIFI_DEBUG
	if (priv->debug_level & IWL_DL_FW_ERRORS) {
		iwl_dump_nic_error_log(priv);
		iwl_dump_nic_event_log(priv);
		iwl_print_rx_config_cmd(priv);
	}
#endif

	wake_up_interruptible(&priv->wait_command_queue);

	/* Keep the restart process from trying to send host
	 * commands by clearing the INIT status bit */
	clear_bit(STATUS_READY, &priv->status);

	if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1258
		IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274
			  "Restarting adapter due to uCode error.\n");

		if (priv->cfg->mod_params->restart_fw)
			queue_work(priv->workqueue, &priv->restart);
	}
}
EXPORT_SYMBOL(iwl_irq_handle_error);

void iwl_configure_filter(struct ieee80211_hw *hw,
			  unsigned int changed_flags,
			  unsigned int *total_flags,
			  int mc_count, struct dev_addr_list *mc_list)
{
	struct iwl_priv *priv = hw->priv;
	__le32 *filter_flags = &priv->staging_rxon.filter_flags;

1275
	IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313
			changed_flags, *total_flags);

	if (changed_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) {
		if (*total_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS))
			*filter_flags |= RXON_FILTER_PROMISC_MSK;
		else
			*filter_flags &= ~RXON_FILTER_PROMISC_MSK;
	}
	if (changed_flags & FIF_ALLMULTI) {
		if (*total_flags & FIF_ALLMULTI)
			*filter_flags |= RXON_FILTER_ACCEPT_GRP_MSK;
		else
			*filter_flags &= ~RXON_FILTER_ACCEPT_GRP_MSK;
	}
	if (changed_flags & FIF_CONTROL) {
		if (*total_flags & FIF_CONTROL)
			*filter_flags |= RXON_FILTER_CTL2HOST_MSK;
		else
			*filter_flags &= ~RXON_FILTER_CTL2HOST_MSK;
	}
	if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
		if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
			*filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
		else
			*filter_flags &= ~RXON_FILTER_BCON_AWARE_MSK;
	}

	/* We avoid iwl_commit_rxon here to commit the new filter flags
	 * since mac80211 will call ieee80211_hw_config immediately.
	 * (mc_list is not supported at this time). Otherwise, we need to
	 * queue a background iwl_commit_rxon work.
	 */

	*total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
			FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
}
EXPORT_SYMBOL(iwl_configure_filter);

T
Tomas Winkler 已提交
1314
int iwl_setup_mac(struct iwl_priv *priv)
1315
{
T
Tomas Winkler 已提交
1316
	int ret;
1317
	struct ieee80211_hw *hw = priv->hw;
1318
	hw->rate_control_algorithm = "iwl-agn-rs";
1319

1320
	/* Tell mac80211 our characteristics */
1321
	hw->flags = IEEE80211_HW_SIGNAL_DBM |
S
Sujith 已提交
1322
		    IEEE80211_HW_NOISE_DBM |
1323
		    IEEE80211_HW_AMPDU_AGGREGATION |
1324
		    IEEE80211_HW_SPECTRUM_MGMT;
1325 1326 1327
	hw->wiphy->interface_modes =
		BIT(NL80211_IFTYPE_STATION) |
		BIT(NL80211_IFTYPE_ADHOC);
1328

1329
	hw->wiphy->custom_regulatory = true;
J
Johannes Berg 已提交
1330 1331 1332 1333

	hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
	/* we create the 802.11 header and a zero-length SSID element */
	hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
1334

1335 1336
	/* Default value; 4 EDCA QOS priorities */
	hw->queues = 4;
T
Tomas Winkler 已提交
1337

1338
	hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
T
Tomas Winkler 已提交
1339 1340 1341 1342 1343 1344 1345 1346 1347 1348

	if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
		priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
			&priv->bands[IEEE80211_BAND_2GHZ];
	if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
		priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
			&priv->bands[IEEE80211_BAND_5GHZ];

	ret = ieee80211_register_hw(priv->hw);
	if (ret) {
1349
		IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
T
Tomas Winkler 已提交
1350 1351 1352 1353 1354
		return ret;
	}
	priv->mac80211_registered = 1;

	return 0;
1355
}
T
Tomas Winkler 已提交
1356
EXPORT_SYMBOL(iwl_setup_mac);
1357

1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368
int iwl_set_hw_params(struct iwl_priv *priv)
{
	priv->hw_params.sw_crypto = priv->cfg->mod_params->sw_crypto;
	priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
	priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
	if (priv->cfg->mod_params->amsdu_size_8K)
		priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_8K;
	else
		priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_4K;
	priv->hw_params.max_pkt_size = priv->hw_params.rx_buf_size - 256;

1369 1370 1371
	if (priv->cfg->mod_params->disable_11n)
		priv->cfg->sku &= ~IWL_SKU_N;

1372 1373 1374 1375
	/* Device-specific setup */
	return priv->cfg->ops->lib->set_hw_params(priv);
}
EXPORT_SYMBOL(iwl_set_hw_params);
T
Tomas Winkler 已提交
1376 1377

int iwl_init_drv(struct iwl_priv *priv)
R
Ron Rindjunsky 已提交
1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391
{
	int ret;

	priv->ibss_beacon = NULL;

	spin_lock_init(&priv->lock);
	spin_lock_init(&priv->sta_lock);
	spin_lock_init(&priv->hcmd_lock);

	INIT_LIST_HEAD(&priv->free_frames);

	mutex_init(&priv->mutex);

	/* Clear the driver's (not device's) station table */
1392
	priv->cfg->ops->smgmt->clear_station_table(priv);
R
Ron Rindjunsky 已提交
1393 1394 1395 1396 1397 1398

	priv->data_retry_limit = -1;
	priv->ieee_channels = NULL;
	priv->ieee_rates = NULL;
	priv->band = IEEE80211_BAND_2GHZ;

1399
	priv->iw_mode = NL80211_IFTYPE_STATION;
R
Ron Rindjunsky 已提交
1400

1401
	priv->current_ht_config.sm_ps = WLAN_HT_CAP_SM_PS_DISABLED;
R
Ron Rindjunsky 已提交
1402 1403

	/* Choose which receivers/antennas to use */
1404 1405 1406
	if (priv->cfg->ops->hcmd->set_rxon_chain)
		priv->cfg->ops->hcmd->set_rxon_chain(priv);

T
Tomas Winkler 已提交
1407
	iwl_init_scan_params(priv);
R
Ron Rindjunsky 已提交
1408 1409 1410 1411 1412 1413 1414

	iwl_reset_qos(priv);

	priv->qos_data.qos_active = 0;
	priv->qos_data.qos_cap.val = 0;

	priv->rates_mask = IWL_RATES_MASK;
1415 1416
	/* If power management is turned on, default to CAM mode */
	priv->power_mode = IWL_POWER_MODE_CAM;
1417
	priv->tx_power_user_lmt = IWL_TX_POWER_TARGET_POWER_MAX;
R
Ron Rindjunsky 已提交
1418 1419 1420

	ret = iwl_init_channel_map(priv);
	if (ret) {
1421
		IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
R
Ron Rindjunsky 已提交
1422 1423 1424 1425 1426
		goto err;
	}

	ret = iwlcore_init_geos(priv);
	if (ret) {
1427
		IWL_ERR(priv, "initializing geos failed: %d\n", ret);
R
Ron Rindjunsky 已提交
1428 1429
		goto err_free_channel_map;
	}
1430
	iwlcore_init_hw_rates(priv, priv->ieee_rates);
R
Ron Rindjunsky 已提交
1431 1432 1433 1434 1435 1436 1437 1438

	return 0;

err_free_channel_map:
	iwl_free_channel_map(priv);
err:
	return ret;
}
T
Tomas Winkler 已提交
1439
EXPORT_SYMBOL(iwl_init_drv);
R
Ron Rindjunsky 已提交
1440

1441 1442 1443 1444
int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
{
	int ret = 0;
	if (tx_power < IWL_TX_POWER_TARGET_POWER_MIN) {
1445 1446 1447
		IWL_WARN(priv, "Requested user TXPOWER %d below lower limit %d.\n",
			 tx_power,
			 IWL_TX_POWER_TARGET_POWER_MIN);
1448 1449 1450 1451
		return -EINVAL;
	}

	if (tx_power > IWL_TX_POWER_TARGET_POWER_MAX) {
1452 1453 1454
		IWL_WARN(priv, "Requested user TXPOWER %d above upper limit %d.\n",
			 tx_power,
			 IWL_TX_POWER_TARGET_POWER_MAX);
1455 1456 1457 1458 1459 1460 1461 1462
		return -EINVAL;
	}

	if (priv->tx_power_user_lmt != tx_power)
		force = true;

	priv->tx_power_user_lmt = tx_power;

1463 1464 1465 1466
	/* if nic is not up don't send command */
	if (!iwl_is_ready_rf(priv))
		return ret;

1467 1468 1469 1470 1471 1472 1473
	if (force && priv->cfg->ops->lib->send_tx_power)
		ret = priv->cfg->ops->lib->send_tx_power(priv);

	return ret;
}
EXPORT_SYMBOL(iwl_set_tx_power);

T
Tomas Winkler 已提交
1474
void iwl_uninit_drv(struct iwl_priv *priv)
1475
{
1476
	iwl_calib_free_results(priv);
T
Tomas Winkler 已提交
1477 1478
	iwlcore_free_geos(priv);
	iwl_free_channel_map(priv);
1479
	kfree(priv->scan);
1480
}
T
Tomas Winkler 已提交
1481
EXPORT_SYMBOL(iwl_uninit_drv);
1482

1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494

void iwl_disable_interrupts(struct iwl_priv *priv)
{
	clear_bit(STATUS_INT_ENABLED, &priv->status);

	/* disable interrupts from uCode/NIC to host */
	iwl_write32(priv, CSR_INT_MASK, 0x00000000);

	/* acknowledge/clear/reset any interrupts still pending
	 * from uCode or flow handler (Rx/Tx DMA) */
	iwl_write32(priv, CSR_INT, 0xffffffff);
	iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
1495
	IWL_DEBUG_ISR(priv, "Disabled interrupts\n");
1496 1497 1498 1499 1500
}
EXPORT_SYMBOL(iwl_disable_interrupts);

void iwl_enable_interrupts(struct iwl_priv *priv)
{
1501
	IWL_DEBUG_ISR(priv, "Enabling interrupts\n");
1502
	set_bit(STATUS_INT_ENABLED, &priv->status);
1503
	iwl_write32(priv, CSR_INT_MASK, priv->inta_mask);
1504 1505 1506
}
EXPORT_SYMBOL(iwl_enable_interrupts);

M
Mohamed Abbas 已提交
1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556

#define ICT_COUNT (PAGE_SIZE/sizeof(u32))

/* Free dram table */
void iwl_free_isr_ict(struct iwl_priv *priv)
{
	if (priv->ict_tbl_vir) {
		pci_free_consistent(priv->pci_dev, (sizeof(u32) * ICT_COUNT) +
					PAGE_SIZE, priv->ict_tbl_vir,
					priv->ict_tbl_dma);
		priv->ict_tbl_vir = NULL;
	}
}
EXPORT_SYMBOL(iwl_free_isr_ict);


/* allocate dram shared table it is a PAGE_SIZE aligned
 * also reset all data related to ICT table interrupt.
 */
int iwl_alloc_isr_ict(struct iwl_priv *priv)
{

	if (priv->cfg->use_isr_legacy)
		return 0;
	/* allocate shrared data table */
	priv->ict_tbl_vir = pci_alloc_consistent(priv->pci_dev, (sizeof(u32) *
						  ICT_COUNT) + PAGE_SIZE,
						  &priv->ict_tbl_dma);
	if (!priv->ict_tbl_vir)
		return -ENOMEM;

	/* align table to PAGE_SIZE boundry */
	priv->aligned_ict_tbl_dma = ALIGN(priv->ict_tbl_dma, PAGE_SIZE);

	IWL_DEBUG_ISR(priv, "ict dma addr %Lx dma aligned %Lx diff %d\n",
			     (unsigned long long)priv->ict_tbl_dma,
			     (unsigned long long)priv->aligned_ict_tbl_dma,
			(int)(priv->aligned_ict_tbl_dma - priv->ict_tbl_dma));

	priv->ict_tbl =  priv->ict_tbl_vir +
			  (priv->aligned_ict_tbl_dma - priv->ict_tbl_dma);

	IWL_DEBUG_ISR(priv, "ict vir addr %p vir aligned %p diff %d\n",
			     priv->ict_tbl, priv->ict_tbl_vir,
			(int)(priv->aligned_ict_tbl_dma - priv->ict_tbl_dma));

	/* reset table and index to all 0 */
	memset(priv->ict_tbl_vir,0, (sizeof(u32) * ICT_COUNT) + PAGE_SIZE);
	priv->ict_index = 0;

1557 1558
	/* add periodic RX interrupt */
	priv->inta_mask |= CSR_INT_BIT_RX_PERIODIC;
M
Mohamed Abbas 已提交
1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590
	return 0;
}
EXPORT_SYMBOL(iwl_alloc_isr_ict);

/* Device is going up inform it about using ICT interrupt table,
 * also we need to tell the driver to start using ICT interrupt.
 */
int iwl_reset_ict(struct iwl_priv *priv)
{
	u32 val;
	unsigned long flags;

	if (!priv->ict_tbl_vir)
		return 0;

	spin_lock_irqsave(&priv->lock, flags);
	iwl_disable_interrupts(priv);

	memset(&priv->ict_tbl[0],0, sizeof(u32) * ICT_COUNT);

	val = priv->aligned_ict_tbl_dma >> PAGE_SHIFT;

	val |= CSR_DRAM_INT_TBL_ENABLE;
	val |= CSR_DRAM_INIT_TBL_WRAP_CHECK;

	IWL_DEBUG_ISR(priv, "CSR_DRAM_INT_TBL_REG =0x%X "
			"aligned dma address %Lx\n",
			val, (unsigned long long)priv->aligned_ict_tbl_dma);

	iwl_write32(priv, CSR_DRAM_INT_TBL_REG, val);
	priv->use_ict = true;
	priv->ict_index = 0;
1591
	iwl_write32(priv, CSR_INT, priv->inta_mask);
M
Mohamed Abbas 已提交
1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672
	iwl_enable_interrupts(priv);
	spin_unlock_irqrestore(&priv->lock, flags);

	return 0;
}
EXPORT_SYMBOL(iwl_reset_ict);

/* Device is going down disable ict interrupt usage */
void iwl_disable_ict(struct iwl_priv *priv)
{
	unsigned long flags;

	spin_lock_irqsave(&priv->lock, flags);
	priv->use_ict = false;
	spin_unlock_irqrestore(&priv->lock, flags);
}
EXPORT_SYMBOL(iwl_disable_ict);

/* interrupt handler using ict table, with this interrupt driver will
 * stop using INTA register to get device's interrupt, reading this register
 * is expensive, device will write interrupts in ICT dram table, increment
 * index then will fire interrupt to driver, driver will OR all ICT table
 * entries from current index up to table entry with 0 value. the result is
 * the interrupt we need to service, driver will set the entries back to 0 and
 * set index.
 */
irqreturn_t iwl_isr_ict(int irq, void *data)
{
	struct iwl_priv *priv = data;
	u32 inta, inta_mask;
	u32 val = 0;

	if (!priv)
		return IRQ_NONE;

	/* dram interrupt table not set yet,
	 * use legacy interrupt.
	 */
	if (!priv->use_ict)
		return iwl_isr(irq, data);

	spin_lock(&priv->lock);

	/* Disable (but don't clear!) interrupts here to avoid
	 * back-to-back ISRs and sporadic interrupts from our NIC.
	 * If we have something to service, the tasklet will re-enable ints.
	 * If we *don't* have something, we'll re-enable before leaving here.
	 */
	inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
	iwl_write32(priv, CSR_INT_MASK, 0x00000000);


	/* Ignore interrupt if there's nothing in NIC to service.
	 * This may be due to IRQ shared with another device,
	 * or due to sporadic interrupts thrown from our NIC. */
	if (!priv->ict_tbl[priv->ict_index]) {
		IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0\n");
		goto none;
	}

	/* read all entries that not 0 start with ict_index */
	while (priv->ict_tbl[priv->ict_index]) {

		val |= priv->ict_tbl[priv->ict_index];
		IWL_DEBUG_ISR(priv, "ICT index %d value 0x%08X\n",
					priv->ict_index,
					priv->ict_tbl[priv->ict_index]);
		priv->ict_tbl[priv->ict_index] = 0;
		priv->ict_index = iwl_queue_inc_wrap(priv->ict_index,
								ICT_COUNT);

	}

	/* We should not get this value, just ignore it. */
	if (val == 0xffffffff)
		val = 0;

	inta = (0xff & val) | ((0xff00 & val) << 16);
	IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x ict 0x%08x\n",
			inta, inta_mask, val);

1673
	inta &= priv->inta_mask;
M
Mohamed Abbas 已提交
1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768
	priv->inta |= inta;

	/* iwl_irq_tasklet() will service interrupts and re-enable them */
	if (likely(inta))
		tasklet_schedule(&priv->irq_tasklet);
	else if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta) {
		/* Allow interrupt if was disabled by this handler and
		 * no tasklet was schedules, We should not enable interrupt,
		 * tasklet will enable it.
		 */
		iwl_enable_interrupts(priv);
	}

	spin_unlock(&priv->lock);
	return IRQ_HANDLED;

 none:
	/* re-enable interrupts here since we don't have anything to service.
	 * only Re-enable if disabled by irq.
	 */
	if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
		iwl_enable_interrupts(priv);

	spin_unlock(&priv->lock);
	return IRQ_NONE;
}
EXPORT_SYMBOL(iwl_isr_ict);


static irqreturn_t iwl_isr(int irq, void *data)
{
	struct iwl_priv *priv = data;
	u32 inta, inta_mask;
	u32 inta_fh;

	if (!priv)
		return IRQ_NONE;

	spin_lock(&priv->lock);

	/* Disable (but don't clear!) interrupts here to avoid
	 *    back-to-back ISRs and sporadic interrupts from our NIC.
	 * If we have something to service, the tasklet will re-enable ints.
	 * If we *don't* have something, we'll re-enable before leaving here. */
	inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
	iwl_write32(priv, CSR_INT_MASK, 0x00000000);

	/* Discover which interrupts are active/pending */
	inta = iwl_read32(priv, CSR_INT);

	/* Ignore interrupt if there's nothing in NIC to service.
	 * This may be due to IRQ shared with another device,
	 * or due to sporadic interrupts thrown from our NIC. */
	if (!inta) {
		IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0\n");
		goto none;
	}

	if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
		/* Hardware disappeared. It might have already raised
		 * an interrupt */
		IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
		goto unplugged;
	}

#ifdef CONFIG_IWLWIFI_DEBUG
	if (priv->debug_level & (IWL_DL_ISR)) {
		inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
		IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, "
			      "fh 0x%08x\n", inta, inta_mask, inta_fh);
	}
#endif

	priv->inta |= inta;
	/* iwl_irq_tasklet() will service interrupts and re-enable them */
	if (likely(inta))
		tasklet_schedule(&priv->irq_tasklet);
	else if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
		iwl_enable_interrupts(priv);

 unplugged:
	spin_unlock(&priv->lock);
	return IRQ_HANDLED;

 none:
	/* re-enable interrupts here since we don't have anything to service. */
	/* only Re-enable if diabled by irq  and no schedules tasklet. */
	if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
		iwl_enable_interrupts(priv);

	spin_unlock(&priv->lock);
	return IRQ_NONE;
}

irqreturn_t iwl_isr_legacy(int irq, void *data)
A
Abhijeet Kolekar 已提交
1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824
{
	struct iwl_priv *priv = data;
	u32 inta, inta_mask;
	u32 inta_fh;
	if (!priv)
		return IRQ_NONE;

	spin_lock(&priv->lock);

	/* Disable (but don't clear!) interrupts here to avoid
	 *    back-to-back ISRs and sporadic interrupts from our NIC.
	 * If we have something to service, the tasklet will re-enable ints.
	 * If we *don't* have something, we'll re-enable before leaving here. */
	inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
	iwl_write32(priv, CSR_INT_MASK, 0x00000000);

	/* Discover which interrupts are active/pending */
	inta = iwl_read32(priv, CSR_INT);
	inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);

	/* Ignore interrupt if there's nothing in NIC to service.
	 * This may be due to IRQ shared with another device,
	 * or due to sporadic interrupts thrown from our NIC. */
	if (!inta && !inta_fh) {
		IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
		goto none;
	}

	if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
		/* Hardware disappeared. It might have already raised
		 * an interrupt */
		IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
		goto unplugged;
	}

	IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
		      inta, inta_mask, inta_fh);

	inta &= ~CSR_INT_BIT_SCD;

	/* iwl_irq_tasklet() will service interrupts and re-enable them */
	if (likely(inta || inta_fh))
		tasklet_schedule(&priv->irq_tasklet);

 unplugged:
	spin_unlock(&priv->lock);
	return IRQ_HANDLED;

 none:
	/* re-enable interrupts here since we don't have anything to service. */
	/* only Re-enable if diabled by irq */
	if (test_bit(STATUS_INT_ENABLED, &priv->status))
		iwl_enable_interrupts(priv);
	spin_unlock(&priv->lock);
	return IRQ_NONE;
}
M
Mohamed Abbas 已提交
1825
EXPORT_SYMBOL(iwl_isr_legacy);
A
Abhijeet Kolekar 已提交
1826

1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841
int iwl_send_bt_config(struct iwl_priv *priv)
{
	struct iwl_bt_cmd bt_cmd = {
		.flags = 3,
		.lead_time = 0xAA,
		.max_kill = 1,
		.kill_ack_mask = 0,
		.kill_cts_mask = 0,
	};

	return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
				sizeof(struct iwl_bt_cmd), &bt_cmd);
}
EXPORT_SYMBOL(iwl_send_bt_config);

1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853
int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags)
{
	u32 stat_flags = 0;
	struct iwl_host_cmd cmd = {
		.id = REPLY_STATISTICS_CMD,
		.meta.flags = flags,
		.len = sizeof(stat_flags),
		.data = (u8 *) &stat_flags,
	};
	return iwl_send_cmd(priv, &cmd);
}
EXPORT_SYMBOL(iwl_send_statistics_request);
1854

1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866
/**
 * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
 *   using sample data 100 bytes apart.  If these sample points are good,
 *   it's a pretty good bet that everything between them is good, too.
 */
static int iwlcore_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
{
	u32 val;
	int ret = 0;
	u32 errcnt = 0;
	u32 i;

1867
	IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1868 1869 1870 1871 1872 1873

	for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
		/* read data comes through single port, auto-incr addr */
		/* NOTE: Use the debugless read so we don't flood kernel log
		 * if IWL_DL_IO is set */
		iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1874
			i + IWL49_RTC_INST_LOWER_BOUND);
1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898
		val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
		if (val != le32_to_cpu(*image)) {
			ret = -EIO;
			errcnt++;
			if (errcnt >= 3)
				break;
		}
	}

	return ret;
}

/**
 * iwlcore_verify_inst_full - verify runtime uCode image in card vs. host,
 *     looking at all data.
 */
static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 *image,
				 u32 len)
{
	u32 val;
	u32 save_len = len;
	int ret = 0;
	u32 errcnt;

1899
	IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1900

1901 1902
	iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
			   IWL49_RTC_INST_LOWER_BOUND);
1903 1904 1905 1906 1907 1908 1909 1910

	errcnt = 0;
	for (; len > 0; len -= sizeof(u32), image++) {
		/* read data comes through single port, auto-incr addr */
		/* NOTE: Use the debugless read so we don't flood kernel log
		 * if IWL_DL_IO is set */
		val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
		if (val != le32_to_cpu(*image)) {
1911
			IWL_ERR(priv, "uCode INST section is invalid at "
1912 1913 1914 1915 1916 1917 1918 1919 1920 1921
				  "offset 0x%x, is 0x%x, s/b 0x%x\n",
				  save_len - len, val, le32_to_cpu(*image));
			ret = -EIO;
			errcnt++;
			if (errcnt >= 20)
				break;
		}
	}

	if (!errcnt)
1922 1923
		IWL_DEBUG_INFO(priv,
		    "ucode image in INSTRUCTION memory is good\n");
1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942

	return ret;
}

/**
 * iwl_verify_ucode - determine which instruction image is in SRAM,
 *    and verify its contents
 */
int iwl_verify_ucode(struct iwl_priv *priv)
{
	__le32 *image;
	u32 len;
	int ret;

	/* Try bootstrap */
	image = (__le32 *)priv->ucode_boot.v_addr;
	len = priv->ucode_boot.len;
	ret = iwlcore_verify_inst_sparse(priv, image, len);
	if (!ret) {
1943
		IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
1944 1945 1946 1947 1948 1949 1950 1951
		return 0;
	}

	/* Try initialize */
	image = (__le32 *)priv->ucode_init.v_addr;
	len = priv->ucode_init.len;
	ret = iwlcore_verify_inst_sparse(priv, image, len);
	if (!ret) {
1952
		IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
1953 1954 1955 1956 1957 1958 1959 1960
		return 0;
	}

	/* Try runtime/protocol */
	image = (__le32 *)priv->ucode_code.v_addr;
	len = priv->ucode_code.len;
	ret = iwlcore_verify_inst_sparse(priv, image, len);
	if (!ret) {
1961
		IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
1962 1963 1964
		return 0;
	}

1965
	IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977

	/* Since nothing seems to match, show first several data entries in
	 * instruction SRAM, so maybe visual inspection will give a clue.
	 * Selection of bootstrap image (vs. other images) is arbitrary. */
	image = (__le32 *)priv->ucode_boot.v_addr;
	len = priv->ucode_boot.len;
	ret = iwl_verify_inst_full(priv, image, len);

	return ret;
}
EXPORT_SYMBOL(iwl_verify_ucode);

1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010

static const char *desc_lookup_text[] = {
	"OK",
	"FAIL",
	"BAD_PARAM",
	"BAD_CHECKSUM",
	"NMI_INTERRUPT_WDG",
	"SYSASSERT",
	"FATAL_ERROR",
	"BAD_COMMAND",
	"HW_ERROR_TUNE_LOCK",
	"HW_ERROR_TEMPERATURE",
	"ILLEGAL_CHAN_FREQ",
	"VCC_NOT_STABLE",
	"FH_ERROR",
	"NMI_INTERRUPT_HOST",
	"NMI_INTERRUPT_ACTION_PT",
	"NMI_INTERRUPT_UNKNOWN",
	"UCODE_VERSION_MISMATCH",
	"HW_ERROR_ABS_LOCK",
	"HW_ERROR_CAL_LOCK_FAIL",
	"NMI_INTERRUPT_INST_ACTION_PT",
	"NMI_INTERRUPT_DATA_ACTION_PT",
	"NMI_TRM_HW_ER",
	"NMI_INTERRUPT_TRM",
	"NMI_INTERRUPT_BREAK_POINT"
	"DEBUG_0",
	"DEBUG_1",
	"DEBUG_2",
	"DEBUG_3",
	"UNKNOWN"
};

2011 2012
static const char *desc_lookup(int i)
{
2013 2014 2015 2016
	int max = ARRAY_SIZE(desc_lookup_text) - 1;

	if (i < 0 || i > max)
		i = max;
2017

2018
	return desc_lookup_text[i];
2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029
}

#define ERROR_START_OFFSET  (1 * sizeof(u32))
#define ERROR_ELEM_SIZE     (7 * sizeof(u32))

void iwl_dump_nic_error_log(struct iwl_priv *priv)
{
	u32 data2, line;
	u32 desc, time, count, base, data1;
	u32 blink1, blink2, ilink1, ilink2;

2030 2031 2032 2033
	if (priv->ucode_type == UCODE_INIT)
		base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr);
	else
		base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
2034 2035

	if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
2036
		IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
2037 2038 2039 2040 2041 2042
		return;
	}

	count = iwl_read_targ_mem(priv, base);

	if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
2043 2044 2045
		IWL_ERR(priv, "Start IWL Error Log Dump:\n");
		IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
			priv->status, count);
2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057
	}

	desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
	blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
	blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
	ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
	ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
	data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
	data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
	line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
	time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));

2058
	IWL_ERR(priv, "Desc                               Time       "
2059
		"data1      data2      line\n");
2060
	IWL_ERR(priv, "%-28s (#%02d) %010u 0x%08X 0x%08X %u\n",
2061
		desc_lookup(desc), desc, time, data1, data2, line);
2062 2063
	IWL_ERR(priv, "blink1  blink2  ilink1  ilink2\n");
	IWL_ERR(priv, "0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
2064 2065 2066 2067 2068
		ilink1, ilink2);

}
EXPORT_SYMBOL(iwl_dump_nic_error_log);

2069 2070 2071 2072 2073 2074
#define EVENT_START_OFFSET  (4 * sizeof(u32))

/**
 * iwl_print_event_log - Dump error event log to syslog
 *
 */
2075
static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
2076 2077 2078 2079 2080 2081 2082 2083 2084 2085
				u32 num_events, u32 mode)
{
	u32 i;
	u32 base;       /* SRAM byte address of event log header */
	u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
	u32 ptr;        /* SRAM byte address of log data */
	u32 ev, time, data; /* event log data */

	if (num_events == 0)
		return;
2086 2087 2088 2089
	if (priv->ucode_type == UCODE_INIT)
		base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
	else
		base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104

	if (mode == 0)
		event_size = 2 * sizeof(u32);
	else
		event_size = 3 * sizeof(u32);

	ptr = base + EVENT_START_OFFSET + (start_idx * event_size);

	/* "time" is actually "data" for mode 0 (no timestamp).
	* place event id # at far right for easier visual parsing. */
	for (i = 0; i < num_events; i++) {
		ev = iwl_read_targ_mem(priv, ptr);
		ptr += sizeof(u32);
		time = iwl_read_targ_mem(priv, ptr);
		ptr += sizeof(u32);
2105 2106
		if (mode == 0) {
			/* data, ev */
2107
			IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n", time, ev);
2108
		} else {
2109 2110
			data = iwl_read_targ_mem(priv, ptr);
			ptr += sizeof(u32);
2111
			IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
2112
					time, data, ev);
2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125
		}
	}
}

void iwl_dump_nic_event_log(struct iwl_priv *priv)
{
	u32 base;       /* SRAM byte address of event log header */
	u32 capacity;   /* event log capacity in # entries */
	u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
	u32 num_wraps;  /* # times uCode wrapped to top of log */
	u32 next_entry; /* index of next entry to be written by uCode */
	u32 size;       /* # entries that we'll print */

2126 2127 2128 2129 2130
	if (priv->ucode_type == UCODE_INIT)
		base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
	else
		base = le32_to_cpu(priv->card_alive.log_event_table_ptr);

2131
	if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
2132
		IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145
		return;
	}

	/* event log header */
	capacity = iwl_read_targ_mem(priv, base);
	mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
	num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
	next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));

	size = num_wraps ? capacity : next_entry;

	/* bail out if nothing in log */
	if (size == 0) {
2146
		IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
2147 2148 2149
		return;
	}

2150
	IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163
			size, num_wraps);

	/* if uCode has wrapped back to top of log, start at the oldest entry,
	 * i.e the next one that uCode would fill. */
	if (num_wraps)
		iwl_print_event_log(priv, next_entry,
					capacity - next_entry, mode);
	/* (then/else) start at top of log */
	iwl_print_event_log(priv, 0, next_entry, mode);

}
EXPORT_SYMBOL(iwl_dump_nic_event_log);

2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176
void iwl_rf_kill_ct_config(struct iwl_priv *priv)
{
	struct iwl_ct_kill_config cmd;
	unsigned long flags;
	int ret = 0;

	spin_lock_irqsave(&priv->lock, flags);
	iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
		    CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
	spin_unlock_irqrestore(&priv->lock, flags);

	cmd.critical_temperature_R =
		cpu_to_le32(priv->hw_params.ct_kill_threshold);
2177

2178 2179 2180
	ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
			       sizeof(cmd), &cmd);
	if (ret)
2181
		IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
2182
	else
2183
		IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD succeeded, "
2184 2185 2186 2187
			"critical temperature is %d\n",
			cmd.critical_temperature_R);
}
EXPORT_SYMBOL(iwl_rf_kill_ct_config);
2188

2189

2190 2191 2192 2193 2194 2195 2196 2197 2198 2199
/*
 * CARD_STATE_CMD
 *
 * Use: Sets the device's internal card state to enable, disable, or halt
 *
 * When in the 'enable' state the card operates as normal.
 * When in the 'disable' state, the card enters into a low power mode.
 * When in the 'halt' state, the card is shut down and must be fully
 * restarted to come back on.
 */
2200
int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
2201 2202 2203 2204 2205 2206 2207 2208 2209 2210
{
	struct iwl_host_cmd cmd = {
		.id = REPLY_CARD_STATE_CMD,
		.len = sizeof(u32),
		.data = &flags,
		.meta.flags = meta_flag,
	};

	return iwl_send_cmd(priv, &cmd);
}
2211
EXPORT_SYMBOL(iwl_send_card_state);
2212 2213 2214 2215 2216 2217 2218 2219

void iwl_radio_kill_sw_disable_radio(struct iwl_priv *priv)
{
	unsigned long flags;

	if (test_bit(STATUS_RF_KILL_SW, &priv->status))
		return;

2220
	IWL_DEBUG_RF_KILL(priv, "Manual SW RF KILL set to: RADIO OFF\n");
2221 2222 2223

	iwl_scan_cancel(priv);
	/* FIXME: This is a workaround for AP */
2224
	if (priv->iw_mode != NL80211_IFTYPE_AP) {
2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248
		spin_lock_irqsave(&priv->lock, flags);
		iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
			    CSR_UCODE_SW_BIT_RFKILL);
		spin_unlock_irqrestore(&priv->lock, flags);
		/* call the host command only if no hw rf-kill set */
		if (!test_bit(STATUS_RF_KILL_HW, &priv->status) &&
		    iwl_is_ready(priv))
			iwl_send_card_state(priv,
				CARD_STATE_CMD_DISABLE, 0);
		set_bit(STATUS_RF_KILL_SW, &priv->status);
			/* make sure mac80211 stop sending Tx frame */
		if (priv->mac80211_registered)
			ieee80211_stop_queues(priv->hw);
	}
}
EXPORT_SYMBOL(iwl_radio_kill_sw_disable_radio);

int iwl_radio_kill_sw_enable_radio(struct iwl_priv *priv)
{
	unsigned long flags;

	if (!test_bit(STATUS_RF_KILL_SW, &priv->status))
		return 0;

2249
	IWL_DEBUG_RF_KILL(priv, "Manual SW RF KILL set to: RADIO ON\n");
2250 2251 2252 2253

	spin_lock_irqsave(&priv->lock, flags);
	iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);

2254 2255 2256 2257 2258 2259 2260 2261
	/* If the driver is up it will receive CARD_STATE_NOTIFICATION
	 * notification where it will clear SW rfkill status.
	 * Setting it here would break the handler. Only if the
	 * interface is down we can set here since we don't
	 * receive any further notification.
	 */
	if (!priv->is_open)
		clear_bit(STATUS_RF_KILL_SW, &priv->status);
2262 2263 2264 2265 2266 2267
	spin_unlock_irqrestore(&priv->lock, flags);

	/* wake up ucode */
	msleep(10);

	iwl_read32(priv, CSR_UCODE_DRV_GP1);
M
Mohamed Abbas 已提交
2268
	spin_lock_irqsave(&priv->reg_lock, flags);
2269 2270
	if (!iwl_grab_nic_access(priv))
		iwl_release_nic_access(priv);
M
Mohamed Abbas 已提交
2271
	spin_unlock_irqrestore(&priv->reg_lock, flags);
2272 2273

	if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2274
		IWL_DEBUG_RF_KILL(priv, "Can not turn radio back on - "
2275 2276 2277 2278
				  "disabled by HW switch\n");
		return 0;
	}

2279 2280 2281 2282 2283 2284 2285 2286 2287 2288
	/* when driver is up while rfkill is on, it wont receive
	 * any CARD_STATE_NOTIFICATION notifications so we have to
	 * restart it in here
	 */
	if (priv->is_open && !test_bit(STATUS_ALIVE, &priv->status)) {
		clear_bit(STATUS_RF_KILL_SW, &priv->status);
		if (!iwl_is_rfkill(priv))
			queue_work(priv->workqueue, &priv->up);
	}

2289 2290 2291 2292
	/* If the driver is already loaded, it will receive
	 * CARD_STATE_NOTIFICATION notifications and the handler will
	 * call restart to reload the driver.
	 */
2293 2294 2295
	return 1;
}
EXPORT_SYMBOL(iwl_radio_kill_sw_enable_radio);
S
Samuel Ortiz 已提交
2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308

void iwl_bg_rf_kill(struct work_struct *work)
{
	struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);

	wake_up_interruptible(&priv->wait_command_queue);

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return;

	mutex_lock(&priv->mutex);

	if (!iwl_is_rfkill(priv)) {
2309
		IWL_DEBUG_RF_KILL(priv,
S
Samuel Ortiz 已提交
2310 2311 2312
			  "HW and/or SW RF Kill no longer active, restarting "
			  "device\n");
		if (!test_bit(STATUS_EXIT_PENDING, &priv->status) &&
2313
		    priv->is_open)
S
Samuel Ortiz 已提交
2314 2315 2316 2317 2318 2319 2320
			queue_work(priv->workqueue, &priv->restart);
	} else {
		/* make sure mac80211 stop sending Tx frame */
		if (priv->mac80211_registered)
			ieee80211_stop_queues(priv->hw);

		if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
2321
			IWL_DEBUG_RF_KILL(priv, "Can not turn radio back on - "
S
Samuel Ortiz 已提交
2322 2323 2324 2325 2326 2327 2328 2329 2330 2331
					  "disabled by SW switch\n");
		else
			IWL_WARN(priv, "Radio Frequency Kill Switch is On:\n"
				    "Kill switch must be turned off for "
				    "wireless networking to work.\n");
	}
	mutex_unlock(&priv->mutex);
	iwl_rfkill_set_hw_state(priv);
}
EXPORT_SYMBOL(iwl_bg_rf_kill);
A
Abhijeet Kolekar 已提交
2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354

void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
			   struct iwl_rx_mem_buffer *rxb)
{
#ifdef CONFIG_IWLWIFI_DEBUG
	struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
	struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
	IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
		     sleep->pm_sleep_mode, sleep->pm_wakeup_src);
#endif
}
EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);

void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
				      struct iwl_rx_mem_buffer *rxb)
{
	struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
	IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
			"notification for %s:\n",
			le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
	iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
}
EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);
2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370

void iwl_rx_reply_error(struct iwl_priv *priv,
			struct iwl_rx_mem_buffer *rxb)
{
	struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;

	IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
		"seq 0x%04X ser 0x%08X\n",
		le32_to_cpu(pkt->u.err_resp.error_type),
		get_cmd_string(pkt->u.err_resp.cmd_id),
		pkt->u.err_resp.cmd_id,
		le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
		le32_to_cpu(pkt->u.err_resp.error_info));
}
EXPORT_SYMBOL(iwl_rx_reply_error);

2371 2372 2373 2374 2375 2376
void iwl_clear_isr_stats(struct iwl_priv *priv)
{
	memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
}
EXPORT_SYMBOL(iwl_clear_isr_stats);

A
Abhijeet Kolekar 已提交
2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419
int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
			   const struct ieee80211_tx_queue_params *params)
{
	struct iwl_priv *priv = hw->priv;
	unsigned long flags;
	int q;

	IWL_DEBUG_MAC80211(priv, "enter\n");

	if (!iwl_is_ready_rf(priv)) {
		IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
		return -EIO;
	}

	if (queue >= AC_NUM) {
		IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
		return 0;
	}

	q = AC_NUM - 1 - queue;

	spin_lock_irqsave(&priv->lock, flags);

	priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
	priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
	priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
	priv->qos_data.def_qos_parm.ac[q].edca_txop =
			cpu_to_le16((params->txop * 32));

	priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
	priv->qos_data.qos_active = 1;

	if (priv->iw_mode == NL80211_IFTYPE_AP)
		iwl_activate_qos(priv, 1);
	else if (priv->assoc_id && iwl_is_associated(priv))
		iwl_activate_qos(priv, 0);

	spin_unlock_irqrestore(&priv->lock, flags);

	IWL_DEBUG_MAC80211(priv, "leave\n");
	return 0;
}
EXPORT_SYMBOL(iwl_mac_conf_tx);
2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481

static void iwl_ht_conf(struct iwl_priv *priv,
			    struct ieee80211_bss_conf *bss_conf)
{
	struct ieee80211_sta_ht_cap *ht_conf;
	struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
	struct ieee80211_sta *sta;

	IWL_DEBUG_MAC80211(priv, "enter: \n");

	if (!iwl_conf->is_ht)
		return;


	/*
	 * It is totally wrong to base global information on something
	 * that is valid only when associated, alas, this driver works
	 * that way and I don't know how to fix it.
	 */

	rcu_read_lock();
	sta = ieee80211_find_sta(priv->hw, priv->bssid);
	if (!sta) {
		rcu_read_unlock();
		return;
	}
	ht_conf = &sta->ht_cap;

	if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
		iwl_conf->sgf |= HT_SHORT_GI_20MHZ;
	if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
		iwl_conf->sgf |= HT_SHORT_GI_40MHZ;

	iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
	iwl_conf->max_amsdu_size =
		!!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);

	iwl_conf->supported_chan_width =
		!!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40);

	/*
	 * XXX: The HT configuration needs to be moved into iwl_mac_config()
	 *	to be done there correctly.
	 */

	iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
	if (conf_is_ht40_minus(&priv->hw->conf))
		iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
	else if (conf_is_ht40_plus(&priv->hw->conf))
		iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;

	/* If no above or below channel supplied disable FAT channel */
	if (iwl_conf->extension_chan_offset != IEEE80211_HT_PARAM_CHA_SEC_ABOVE &&
	    iwl_conf->extension_chan_offset != IEEE80211_HT_PARAM_CHA_SEC_BELOW)
		iwl_conf->supported_chan_width = 0;

	iwl_conf->sm_ps = (u8)((ht_conf->cap & IEEE80211_HT_CAP_SM_PS) >> 2);

	memcpy(&iwl_conf->mcs, &ht_conf->mcs, 16);

	iwl_conf->tx_chan_width = iwl_conf->supported_chan_width != 0;
	iwl_conf->ht_protection =
2482
		bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
2483
	iwl_conf->non_GF_STA_present =
2484
		!!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
2485 2486 2487 2488 2489 2490 2491 2492

	rcu_read_unlock();

	IWL_DEBUG_MAC80211(priv, "leave\n");
}

#define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
void iwl_bss_info_changed(struct ieee80211_hw *hw,
2493 2494 2495
			  struct ieee80211_vif *vif,
			  struct ieee80211_bss_conf *bss_conf,
			  u32 changes)
2496 2497
{
	struct iwl_priv *priv = hw->priv;
2498
	int ret;
2499 2500 2501

	IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);

2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555
	if (!iwl_is_alive(priv))
		return;

	mutex_lock(&priv->mutex);

	if (changes & BSS_CHANGED_BEACON &&
	    priv->iw_mode == NL80211_IFTYPE_AP) {
		dev_kfree_skb(priv->ibss_beacon);
		priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
	}

	if ((changes & BSS_CHANGED_BSSID) && !iwl_is_rfkill(priv)) {
		/* If there is currently a HW scan going on in the background
		 * then we need to cancel it else the RXON below will fail. */
		if (iwl_scan_cancel_timeout(priv, 100)) {
			IWL_WARN(priv, "Aborted scan still in progress "
				    "after 100ms\n");
			IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
			mutex_unlock(&priv->mutex);
			return;
		}
		memcpy(priv->staging_rxon.bssid_addr,
		       bss_conf->bssid, ETH_ALEN);

		/* TODO: Audit driver for usage of these members and see
		 * if mac80211 deprecates them (priv->bssid looks like it
		 * shouldn't be there, but I haven't scanned the IBSS code
		 * to verify) - jpk */
		memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);

		if (priv->iw_mode == NL80211_IFTYPE_AP)
			iwlcore_config_ap(priv);
		else {
			int rc = iwlcore_commit_rxon(priv);
			if ((priv->iw_mode == NL80211_IFTYPE_STATION) && rc)
				iwl_rxon_add_station(
					priv, priv->active_rxon.bssid_addr, 1);
		}
	} else if (!iwl_is_rfkill(priv)) {
		iwl_scan_cancel_timeout(priv, 100);
		priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
		iwlcore_commit_rxon(priv);
	}

	if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
	    changes & BSS_CHANGED_BEACON) {
		struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);

		if (beacon)
			iwl_mac_beacon_update(hw, beacon);
	}

	mutex_unlock(&priv->mutex);

2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574
	if (changes & BSS_CHANGED_ERP_PREAMBLE) {
		IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
				   bss_conf->use_short_preamble);
		if (bss_conf->use_short_preamble)
			priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
		else
			priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
	}

	if (changes & BSS_CHANGED_ERP_CTS_PROT) {
		IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
		if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
			priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
		else
			priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
	}

	if (changes & BSS_CHANGED_HT) {
		iwl_ht_conf(priv, bss_conf);
2575 2576 2577

		if (priv->cfg->ops->hcmd->set_rxon_chain)
			priv->cfg->ops->hcmd->set_rxon_chain(priv);
2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606
	}

	if (changes & BSS_CHANGED_ASSOC) {
		IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
		/* This should never happen as this function should
		 * never be called from interrupt context. */
		if (WARN_ON_ONCE(in_interrupt()))
			return;
		if (bss_conf->assoc) {
			priv->assoc_id = bss_conf->aid;
			priv->beacon_int = bss_conf->beacon_int;
			priv->power_data.dtim_period = bss_conf->dtim_period;
			priv->timestamp = bss_conf->timestamp;
			priv->assoc_capability = bss_conf->assoc_capability;

			/* we have just associated, don't start scan too early
			 * leave time for EAPOL exchange to complete
			 */
			priv->next_scan_jiffies = jiffies +
					IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
			mutex_lock(&priv->mutex);
			priv->cfg->ops->lib->post_associate(priv);
			mutex_unlock(&priv->mutex);
		} else {
			priv->assoc_id = 0;
			IWL_DEBUG_MAC80211(priv, "DISASSOC %d\n", bss_conf->assoc);
		}
	} else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
			IWL_DEBUG_MAC80211(priv, "Associated Changes %d\n", changes);
2607 2608 2609 2610 2611 2612
			ret = iwl_send_rxon_assoc(priv);
			if (!ret)
				/* Sync active_rxon with latest change. */
				memcpy((void *)&priv->active_rxon,
					&priv->staging_rxon,
					sizeof(struct iwl_rxon_cmd));
2613
	}
2614
	IWL_DEBUG_MAC80211(priv, "leave\n");
2615 2616 2617
}
EXPORT_SYMBOL(iwl_bss_info_changed);

2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658
int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
{
	struct iwl_priv *priv = hw->priv;
	unsigned long flags;
	__le64 timestamp;

	IWL_DEBUG_MAC80211(priv, "enter\n");

	if (!iwl_is_ready_rf(priv)) {
		IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
		return -EIO;
	}

	if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
		IWL_DEBUG_MAC80211(priv, "leave - not IBSS\n");
		return -EIO;
	}

	spin_lock_irqsave(&priv->lock, flags);

	if (priv->ibss_beacon)
		dev_kfree_skb(priv->ibss_beacon);

	priv->ibss_beacon = skb;

	priv->assoc_id = 0;
	timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
	priv->timestamp = le64_to_cpu(timestamp);

	IWL_DEBUG_MAC80211(priv, "leave\n");
	spin_unlock_irqrestore(&priv->lock, flags);

	iwl_reset_qos(priv);

	priv->cfg->ops->lib->post_associate(priv);


	return 0;
}
EXPORT_SYMBOL(iwl_mac_beacon_update);

2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693
int iwl_set_mode(struct iwl_priv *priv, int mode)
{
	if (mode == NL80211_IFTYPE_ADHOC) {
		const struct iwl_channel_info *ch_info;

		ch_info = iwl_get_channel_info(priv,
			priv->band,
			le16_to_cpu(priv->staging_rxon.channel));

		if (!ch_info || !is_channel_ibss(ch_info)) {
			IWL_ERR(priv, "channel %d not IBSS channel\n",
				  le16_to_cpu(priv->staging_rxon.channel));
			return -EINVAL;
		}
	}

	iwl_connection_init_rx_config(priv, mode);

	if (priv->cfg->ops->hcmd->set_rxon_chain)
		priv->cfg->ops->hcmd->set_rxon_chain(priv);

	memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);

	priv->cfg->ops->smgmt->clear_station_table(priv);

	/* dont commit rxon if rf-kill is on*/
	if (!iwl_is_ready_rf(priv))
		return -EAGAIN;

	iwlcore_commit_rxon(priv);

	return 0;
}
EXPORT_SYMBOL(iwl_set_mode);

2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730
int iwl_mac_add_interface(struct ieee80211_hw *hw,
				 struct ieee80211_if_init_conf *conf)
{
	struct iwl_priv *priv = hw->priv;
	unsigned long flags;

	IWL_DEBUG_MAC80211(priv, "enter: type %d\n", conf->type);

	if (priv->vif) {
		IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
		return -EOPNOTSUPP;
	}

	spin_lock_irqsave(&priv->lock, flags);
	priv->vif = conf->vif;
	priv->iw_mode = conf->type;

	spin_unlock_irqrestore(&priv->lock, flags);

	mutex_lock(&priv->mutex);

	if (conf->mac_addr) {
		IWL_DEBUG_MAC80211(priv, "Set %pM\n", conf->mac_addr);
		memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
	}

	if (iwl_set_mode(priv, conf->type) == -EAGAIN)
		/* we are not ready, will run again when ready */
		set_bit(STATUS_MODE_PENDING, &priv->status);

	mutex_unlock(&priv->mutex);

	IWL_DEBUG_MAC80211(priv, "leave\n");
	return 0;
}
EXPORT_SYMBOL(iwl_mac_add_interface);

2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755
void iwl_mac_remove_interface(struct ieee80211_hw *hw,
				     struct ieee80211_if_init_conf *conf)
{
	struct iwl_priv *priv = hw->priv;

	IWL_DEBUG_MAC80211(priv, "enter\n");

	mutex_lock(&priv->mutex);

	if (iwl_is_ready_rf(priv)) {
		iwl_scan_cancel_timeout(priv, 100);
		priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
		iwlcore_commit_rxon(priv);
	}
	if (priv->vif == conf->vif) {
		priv->vif = NULL;
		memset(priv->bssid, 0, ETH_ALEN);
	}
	mutex_unlock(&priv->mutex);

	IWL_DEBUG_MAC80211(priv, "leave\n");

}
EXPORT_SYMBOL(iwl_mac_remove_interface);

2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830
/**
 * iwl_mac_config - mac80211 config callback
 *
 * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
 * be set inappropriately and the driver currently sets the hardware up to
 * use it whenever needed.
 */
int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
{
	struct iwl_priv *priv = hw->priv;
	const struct iwl_channel_info *ch_info;
	struct ieee80211_conf *conf = &hw->conf;
	unsigned long flags = 0;
	int ret = 0;
	u16 ch;
	int scan_active = 0;

	mutex_lock(&priv->mutex);

	IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
					conf->channel->hw_value, changed);

	if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
			test_bit(STATUS_SCANNING, &priv->status))) {
		scan_active = 1;
		IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
	}


	/* during scanning mac80211 will delay channel setting until
	 * scan finish with changed = 0
	 */
	if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
		if (scan_active)
			goto set_ch_out;

		ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
		ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
		if (!is_channel_valid(ch_info)) {
			IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
			ret = -EINVAL;
			goto set_ch_out;
		}

		if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
			!is_channel_ibss(ch_info)) {
			IWL_ERR(priv, "channel %d in band %d not "
				"IBSS channel\n",
				conf->channel->hw_value, conf->channel->band);
			ret = -EINVAL;
			goto set_ch_out;
		}

		priv->current_ht_config.is_ht = conf_is_ht(conf);

		spin_lock_irqsave(&priv->lock, flags);


		/* if we are switching from ht to 2.4 clear flags
		 * from any ht related info since 2.4 does not
		 * support ht */
		if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
			priv->staging_rxon.flags = 0;

		iwl_set_rxon_channel(priv, conf->channel);

		iwl_set_flags_for_band(priv, conf->channel->band);
		spin_unlock_irqrestore(&priv->lock, flags);
 set_ch_out:
		/* The list of supported rates and rate mask can be different
		 * for each band; since the band may have changed, reset
		 * the rate mask to what mac80211 lists */
		iwl_set_rate(priv);
	}

J
Johannes Berg 已提交
2831 2832 2833 2834 2835
	if (changed & IEEE80211_CONF_CHANGE_PS &&
	    priv->iw_mode == NL80211_IFTYPE_STATION) {
		priv->power_data.power_disabled =
			!(conf->flags & IEEE80211_CONF_PS);
		ret = iwl_power_update_mode(priv, 0);
2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867
		if (ret)
			IWL_DEBUG_MAC80211(priv, "Error setting power level\n");
	}

	if (changed & IEEE80211_CONF_CHANGE_POWER) {
		IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
			priv->tx_power_user_lmt, conf->power_level);

		iwl_set_tx_power(priv, conf->power_level, false);
	}

	/* call to ensure that 4965 rx_chain is set properly in monitor mode */
	if (priv->cfg->ops->hcmd->set_rxon_chain)
		priv->cfg->ops->hcmd->set_rxon_chain(priv);

	if (changed & IEEE80211_CONF_CHANGE_RADIO_ENABLED) {
		if (conf->radio_enabled &&
			iwl_radio_kill_sw_enable_radio(priv)) {
			IWL_DEBUG_MAC80211(priv, "leave - RF-KILL - "
						"waiting for uCode\n");
			goto out;
		}

		if (!conf->radio_enabled)
			iwl_radio_kill_sw_disable_radio(priv);
	}

	if (!conf->radio_enabled) {
		IWL_DEBUG_MAC80211(priv, "leave - radio disabled\n");
		goto out;
	}

2868 2869 2870 2871 2872
	if (!iwl_is_ready(priv)) {
		IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
		goto out;
	}

2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889
	if (scan_active)
		goto out;

	if (memcmp(&priv->active_rxon,
		   &priv->staging_rxon, sizeof(priv->staging_rxon)))
		iwlcore_commit_rxon(priv);
	else
		IWL_DEBUG_INFO(priv, "Not re-sending same RXON configuration.\n");


out:
	IWL_DEBUG_MAC80211(priv, "leave\n");
	mutex_unlock(&priv->mutex);
	return ret;
}
EXPORT_SYMBOL(iwl_mac_config);

2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925
int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
			 struct ieee80211_tx_queue_stats *stats)
{
	struct iwl_priv *priv = hw->priv;
	int i, avail;
	struct iwl_tx_queue *txq;
	struct iwl_queue *q;
	unsigned long flags;

	IWL_DEBUG_MAC80211(priv, "enter\n");

	if (!iwl_is_ready_rf(priv)) {
		IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
		return -EIO;
	}

	spin_lock_irqsave(&priv->lock, flags);

	for (i = 0; i < AC_NUM; i++) {
		txq = &priv->txq[i];
		q = &txq->q;
		avail = iwl_queue_space(q);

		stats[i].len = q->n_window - avail;
		stats[i].limit = q->n_window - q->high_mark;
		stats[i].count = q->n_window;

	}
	spin_unlock_irqrestore(&priv->lock, flags);

	IWL_DEBUG_MAC80211(priv, "leave\n");

	return 0;
}
EXPORT_SYMBOL(iwl_mac_get_tx_stats);

2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950
void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
{
	struct iwl_priv *priv = hw->priv;
	unsigned long flags;

	mutex_lock(&priv->mutex);
	IWL_DEBUG_MAC80211(priv, "enter\n");

	spin_lock_irqsave(&priv->lock, flags);
	memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
	spin_unlock_irqrestore(&priv->lock, flags);

	iwl_reset_qos(priv);

	spin_lock_irqsave(&priv->lock, flags);
	priv->assoc_id = 0;
	priv->assoc_capability = 0;
	priv->assoc_station_added = 0;

	/* new association get rid of ibss beacon skb */
	if (priv->ibss_beacon)
		dev_kfree_skb(priv->ibss_beacon);

	priv->ibss_beacon = NULL;

2951
	priv->beacon_int = priv->vif->bss_conf.beacon_int;
2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986
	priv->timestamp = 0;
	if ((priv->iw_mode == NL80211_IFTYPE_STATION))
		priv->beacon_int = 0;

	spin_unlock_irqrestore(&priv->lock, flags);

	if (!iwl_is_ready_rf(priv)) {
		IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
		mutex_unlock(&priv->mutex);
		return;
	}

	/* we are restarting association process
	 * clear RXON_FILTER_ASSOC_MSK bit
	 */
	if (priv->iw_mode != NL80211_IFTYPE_AP) {
		iwl_scan_cancel_timeout(priv, 100);
		priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
		iwlcore_commit_rxon(priv);
	}

	if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
		IWL_DEBUG_MAC80211(priv, "leave - not in IBSS\n");
		mutex_unlock(&priv->mutex);
		return;
	}

	iwl_set_rate(priv);

	mutex_unlock(&priv->mutex);

	IWL_DEBUG_MAC80211(priv, "leave\n");
}
EXPORT_SYMBOL(iwl_mac_reset_tsf);

2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026
#ifdef CONFIG_PM

int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
{
	struct iwl_priv *priv = pci_get_drvdata(pdev);

	/*
	 * This function is called when system goes into suspend state
	 * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
	 * first but since iwl_mac_stop() has no knowledge of who the caller is,
	 * it will not call apm_ops.stop() to stop the DMA operation.
	 * Calling apm_ops.stop here to make sure we stop the DMA.
	 */
	priv->cfg->ops->lib->apm_ops.stop(priv);

	pci_save_state(pdev);
	pci_disable_device(pdev);
	pci_set_power_state(pdev, PCI_D3hot);

	return 0;
}
EXPORT_SYMBOL(iwl_pci_suspend);

int iwl_pci_resume(struct pci_dev *pdev)
{
	struct iwl_priv *priv = pci_get_drvdata(pdev);
	int ret;

	pci_set_power_state(pdev, PCI_D0);
	ret = pci_enable_device(pdev);
	if (ret)
		return ret;
	pci_restore_state(pdev);
	iwl_enable_interrupts(priv);

	return 0;
}
EXPORT_SYMBOL(iwl_pci_resume);

#endif /* CONFIG_PM */