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tegrakernel/kernel/kernel-4.9/drivers/net/wireless/intel/iwlwifi/dvm/mac80211.c

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/******************************************************************************
*
* Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
*
* Portions of this file are derived from the ipw3945 project, as well
* as portions of the ieee80211 subsystem header files.
*
* 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.
*
* Contact Information:
* Intel Linux Wireless <linuxwifi@intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
*****************************************************************************/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/dma-mapping.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/if_arp.h>
#include <net/ieee80211_radiotap.h>
#include <net/mac80211.h>
#include <asm/div64.h>
#include "iwl-io.h"
#include "iwl-trans.h"
#include "iwl-op-mode.h"
#include "iwl-modparams.h"
#include "dev.h"
#include "calib.h"
#include "agn.h"
/*****************************************************************************
*
* mac80211 entry point functions
*
*****************************************************************************/
static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
{
.max = 1,
.types = BIT(NL80211_IFTYPE_STATION),
},
{
.max = 1,
.types = BIT(NL80211_IFTYPE_AP),
},
};
static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
{
.max = 2,
.types = BIT(NL80211_IFTYPE_STATION),
},
};
static const struct ieee80211_iface_combination
iwlagn_iface_combinations_dualmode[] = {
{ .num_different_channels = 1,
.max_interfaces = 2,
.beacon_int_infra_match = true,
.limits = iwlagn_sta_ap_limits,
.n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
},
{ .num_different_channels = 1,
.max_interfaces = 2,
.limits = iwlagn_2sta_limits,
.n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
},
};
/*
* Not a mac80211 entry point function, but it fits in with all the
* other mac80211 functions grouped here.
*/
int iwlagn_mac_setup_register(struct iwl_priv *priv,
const struct iwl_ucode_capabilities *capa)
{
int ret;
struct ieee80211_hw *hw = priv->hw;
struct iwl_rxon_context *ctx;
hw->rate_control_algorithm = "iwl-agn-rs";
/* Tell mac80211 our characteristics */
ieee80211_hw_set(hw, SIGNAL_DBM);
ieee80211_hw_set(hw, AMPDU_AGGREGATION);
ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC);
ieee80211_hw_set(hw, SPECTRUM_MGMT);
ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
ieee80211_hw_set(hw, QUEUE_CONTROL);
ieee80211_hw_set(hw, SUPPORTS_PS);
ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
ieee80211_hw_set(hw, WANT_MONITOR_VIF);
if (priv->trans->max_skb_frags)
hw->netdev_features = NETIF_F_HIGHDMA | NETIF_F_SG;
hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE;
hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT;
/*
* Including the following line will crash some AP's. This
* workaround removes the stimulus which causes the crash until
* the AP software can be fixed.
hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
*/
if (priv->nvm_data->sku_cap_11n_enable)
hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS |
NL80211_FEATURE_STATIC_SMPS;
/*
* Enable 11w if advertised by firmware and software crypto
* is not enabled (as the firmware will interpret some mgmt
* packets, so enabling it with software crypto isn't safe)
*/
if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
!iwlwifi_mod_params.sw_crypto)
ieee80211_hw_set(hw, MFP_CAPABLE);
hw->sta_data_size = sizeof(struct iwl_station_priv);
hw->vif_data_size = sizeof(struct iwl_vif_priv);
for_each_context(priv, ctx) {
hw->wiphy->interface_modes |= ctx->interface_modes;
hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
}
BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
hw->wiphy->iface_combinations =
iwlagn_iface_combinations_dualmode;
hw->wiphy->n_iface_combinations =
ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
}
hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
REGULATORY_DISABLE_BEACON_HINTS;
#ifdef CONFIG_PM_SLEEP
if (priv->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
priv->trans->ops->d3_suspend &&
priv->trans->ops->d3_resume &&
device_can_wakeup(priv->trans->dev)) {
priv->wowlan_support.flags = WIPHY_WOWLAN_MAGIC_PKT |
WIPHY_WOWLAN_DISCONNECT |
WIPHY_WOWLAN_EAP_IDENTITY_REQ |
WIPHY_WOWLAN_RFKILL_RELEASE;
if (!iwlwifi_mod_params.sw_crypto)
priv->wowlan_support.flags |=
WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
WIPHY_WOWLAN_GTK_REKEY_FAILURE;
priv->wowlan_support.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
priv->wowlan_support.pattern_min_len =
IWLAGN_WOWLAN_MIN_PATTERN_LEN;
priv->wowlan_support.pattern_max_len =
IWLAGN_WOWLAN_MAX_PATTERN_LEN;
hw->wiphy->wowlan = &priv->wowlan_support;
}
#endif
if (iwlwifi_mod_params.power_save)
hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
else
hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
/* we create the 802.11 header and a max-length SSID element */
hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34;
/*
* We don't use all queues: 4 and 9 are unused and any
* aggregation queue gets mapped down to the AC queue.
*/
hw->queues = IWLAGN_FIRST_AMPDU_QUEUE;
hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
if (priv->nvm_data->bands[NL80211_BAND_2GHZ].n_channels)
priv->hw->wiphy->bands[NL80211_BAND_2GHZ] =
&priv->nvm_data->bands[NL80211_BAND_2GHZ];
if (priv->nvm_data->bands[NL80211_BAND_5GHZ].n_channels)
priv->hw->wiphy->bands[NL80211_BAND_5GHZ] =
&priv->nvm_data->bands[NL80211_BAND_5GHZ];
hw->wiphy->hw_version = priv->trans->hw_id;
iwl_leds_init(priv);
ret = ieee80211_register_hw(priv->hw);
if (ret) {
IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
iwl_leds_exit(priv);
return ret;
}
priv->mac80211_registered = 1;
return 0;
}
void iwlagn_mac_unregister(struct iwl_priv *priv)
{
if (!priv->mac80211_registered)
return;
iwl_leds_exit(priv);
ieee80211_unregister_hw(priv->hw);
priv->mac80211_registered = 0;
}
static int __iwl_up(struct iwl_priv *priv)
{
struct iwl_rxon_context *ctx;
int ret;
lockdep_assert_held(&priv->mutex);
if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
return -EIO;
}
for_each_context(priv, ctx) {
ret = iwlagn_alloc_bcast_station(priv, ctx);
if (ret) {
iwl_dealloc_bcast_stations(priv);
return ret;
}
}
ret = iwl_trans_start_hw(priv->trans);
if (ret) {
IWL_ERR(priv, "Failed to start HW: %d\n", ret);
goto error;
}
ret = iwl_run_init_ucode(priv);
if (ret) {
IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
goto error;
}
ret = iwl_trans_start_hw(priv->trans);
if (ret) {
IWL_ERR(priv, "Failed to start HW: %d\n", ret);
goto error;
}
ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
if (ret) {
IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
goto error;
}
ret = iwl_alive_start(priv);
if (ret)
goto error;
return 0;
error:
set_bit(STATUS_EXIT_PENDING, &priv->status);
iwl_down(priv);
clear_bit(STATUS_EXIT_PENDING, &priv->status);
IWL_ERR(priv, "Unable to initialize device.\n");
return ret;
}
static int iwlagn_mac_start(struct ieee80211_hw *hw)
{
struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
int ret;
IWL_DEBUG_MAC80211(priv, "enter\n");
/* we should be verifying the device is ready to be opened */
mutex_lock(&priv->mutex);
ret = __iwl_up(priv);
mutex_unlock(&priv->mutex);
if (ret)
return ret;
IWL_DEBUG_INFO(priv, "Start UP work done.\n");
/* Now we should be done, and the READY bit should be set. */
if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
ret = -EIO;
iwlagn_led_enable(priv);
priv->is_open = 1;
IWL_DEBUG_MAC80211(priv, "leave\n");
return 0;
}
static void iwlagn_mac_stop(struct ieee80211_hw *hw)
{
struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
IWL_DEBUG_MAC80211(priv, "enter\n");
if (!priv->is_open)
return;
priv->is_open = 0;
mutex_lock(&priv->mutex);
iwl_down(priv);
mutex_unlock(&priv->mutex);
iwl_cancel_deferred_work(priv);
flush_workqueue(priv->workqueue);
IWL_DEBUG_MAC80211(priv, "leave\n");
}
static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct cfg80211_gtk_rekey_data *data)
{
struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
if (iwlwifi_mod_params.sw_crypto)
return;
IWL_DEBUG_MAC80211(priv, "enter\n");
mutex_lock(&priv->mutex);
if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
goto out;
memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
priv->replay_ctr =
cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
priv->have_rekey_data = true;
out:
mutex_unlock(&priv->mutex);
IWL_DEBUG_MAC80211(priv, "leave\n");
}
#ifdef CONFIG_PM_SLEEP
static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
struct cfg80211_wowlan *wowlan)
{
struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
int ret;
if (WARN_ON(!wowlan))
return -EINVAL;
IWL_DEBUG_MAC80211(priv, "enter\n");
mutex_lock(&priv->mutex);
/* Don't attempt WoWLAN when not associated, tear down instead. */
if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
!iwl_is_associated_ctx(ctx)) {
ret = 1;
goto out;
}
ret = iwlagn_suspend(priv, wowlan);
if (ret)
goto error;
/* let the ucode operate on its own */
iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET,
CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
iwl_trans_d3_suspend(priv->trans, false, true);
goto out;
error:
priv->wowlan = false;
iwlagn_prepare_restart(priv);
ieee80211_restart_hw(priv->hw);
out:
mutex_unlock(&priv->mutex);
IWL_DEBUG_MAC80211(priv, "leave\n");
return ret;
}
struct iwl_resume_data {
struct iwl_priv *priv;
struct iwlagn_wowlan_status *cmd;
bool valid;
};
static bool iwl_resume_status_fn(struct iwl_notif_wait_data *notif_wait,
struct iwl_rx_packet *pkt, void *data)
{
struct iwl_resume_data *resume_data = data;
struct iwl_priv *priv = resume_data->priv;
if (iwl_rx_packet_payload_len(pkt) != sizeof(*resume_data->cmd)) {
IWL_ERR(priv, "rx wrong size data\n");
return true;
}
memcpy(resume_data->cmd, pkt->data, sizeof(*resume_data->cmd));
resume_data->valid = true;
return true;
}
static int iwlagn_mac_resume(struct ieee80211_hw *hw)
{
struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
struct ieee80211_vif *vif;
u32 base;
int ret;
enum iwl_d3_status d3_status;
struct error_table_start {
/* cf. struct iwl_error_event_table */
u32 valid;
u32 error_id;
} err_info;
struct iwl_notification_wait status_wait;
static const u16 status_cmd[] = {
REPLY_WOWLAN_GET_STATUS,
};
struct iwlagn_wowlan_status status_data = {};
struct iwl_resume_data resume_data = {
.priv = priv,
.cmd = &status_data,
.valid = false,
};
struct cfg80211_wowlan_wakeup wakeup = {
.pattern_idx = -1,
};
#ifdef CONFIG_IWLWIFI_DEBUGFS
const struct fw_img *img;
#endif
IWL_DEBUG_MAC80211(priv, "enter\n");
mutex_lock(&priv->mutex);
/* we'll clear ctx->vif during iwlagn_prepare_restart() */
vif = ctx->vif;
ret = iwl_trans_d3_resume(priv->trans, &d3_status, false, true);
if (ret)
goto out_unlock;
if (d3_status != IWL_D3_STATUS_ALIVE) {
IWL_INFO(priv, "Device was reset during suspend\n");
goto out_unlock;
}
/* uCode is no longer operating by itself */
iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
base = priv->device_pointers.error_event_table;
if (!iwlagn_hw_valid_rtc_data_addr(base)) {
IWL_WARN(priv, "Invalid error table during resume!\n");
goto out_unlock;
}
iwl_trans_read_mem_bytes(priv->trans, base,
&err_info, sizeof(err_info));
if (err_info.valid) {
IWL_INFO(priv, "error table is valid (%d, 0x%x)\n",
err_info.valid, err_info.error_id);
if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
wakeup.rfkill_release = true;
ieee80211_report_wowlan_wakeup(vif, &wakeup,
GFP_KERNEL);
}
goto out_unlock;
}
#ifdef CONFIG_IWLWIFI_DEBUGFS
img = &priv->fw->img[IWL_UCODE_WOWLAN];
if (!priv->wowlan_sram)
priv->wowlan_sram =
kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
GFP_KERNEL);
if (priv->wowlan_sram)
iwl_trans_read_mem(priv->trans, 0x800000,
priv->wowlan_sram,
img->sec[IWL_UCODE_SECTION_DATA].len / 4);
#endif
/*
* This is very strange. The GET_STATUS command is sent but the device
* doesn't reply properly, it seems it doesn't close the RBD so one is
* always left open ... As a result, we need to send another command
* and have to reset the driver afterwards. As we need to switch to
* runtime firmware again that'll happen.
*/
iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd,
ARRAY_SIZE(status_cmd), iwl_resume_status_fn,
&resume_data);
iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL);
iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL);
/* an RBD is left open in the firmware now! */
ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5);
if (ret)
goto out_unlock;
if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) {
u32 reasons = le32_to_cpu(status_data.wakeup_reason);
struct cfg80211_wowlan_wakeup *wakeup_report;
IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons);
if (reasons) {
if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET)
wakeup.magic_pkt = true;
if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH)
wakeup.pattern_idx = status_data.pattern_number;
if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS |
IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE))
wakeup.disconnect = true;
if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL)
wakeup.gtk_rekey_failure = true;
if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ)
wakeup.eap_identity_req = true;
if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE)
wakeup.four_way_handshake = true;
wakeup_report = &wakeup;
} else {
wakeup_report = NULL;
}
ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
}
priv->wowlan = false;
iwlagn_prepare_restart(priv);
memset((void *)&ctx->active, 0, sizeof(ctx->active));
iwl_connection_init_rx_config(priv, ctx);
iwlagn_set_rxon_chain(priv, ctx);
out_unlock:
mutex_unlock(&priv->mutex);
IWL_DEBUG_MAC80211(priv, "leave\n");
ieee80211_resume_disconnect(vif);
return 1;
}
static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled)
{
struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
device_set_wakeup_enable(priv->trans->dev, enabled);
}
#endif
static void iwlagn_mac_tx(struct ieee80211_hw *hw,
struct ieee80211_tx_control *control,
struct sk_buff *skb)
{
struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
if (iwlagn_tx_skb(priv, control->sta, skb))
ieee80211_free_txskb(hw, skb);
}
static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_key_conf *keyconf,
struct ieee80211_sta *sta,
u32 iv32, u16 *phase1key)
{
struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
}
static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta,
struct ieee80211_key_conf *key)
{
struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
struct iwl_rxon_context *ctx = vif_priv->ctx;
int ret;
bool is_default_wep_key = false;
IWL_DEBUG_MAC80211(priv, "enter\n");
if (iwlwifi_mod_params.sw_crypto) {
IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
return -EOPNOTSUPP;
}
switch (key->cipher) {
case WLAN_CIPHER_SUITE_TKIP:
key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
/* fall through */
case WLAN_CIPHER_SUITE_CCMP:
key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
break;
default:
break;
}
/*
* We could program these keys into the hardware as well, but we
* don't expect much multicast traffic in IBSS and having keys
* for more stations is probably more useful.
*
* Mark key TX-only and return 0.
*/
if (vif->type == NL80211_IFTYPE_ADHOC &&
!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
key->hw_key_idx = WEP_INVALID_OFFSET;
return 0;
}
/* If they key was TX-only, accept deletion */
if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
return 0;
mutex_lock(&priv->mutex);
iwl_scan_cancel_timeout(priv, 100);
BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
/*
* If we are getting WEP group key and we didn't receive any key mapping
* so far, we are in legacy wep mode (group key only), otherwise we are
* in 1X mode.
* In legacy wep mode, we use another host command to the uCode.
*/
if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
if (cmd == SET_KEY)
is_default_wep_key = !ctx->key_mapping_keys;
else
is_default_wep_key =
key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
}
switch (cmd) {
case SET_KEY:
if (is_default_wep_key) {
ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
break;
}
ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
if (ret) {
/*
* can't add key for RX, but we don't need it
* in the device for TX so still return 0
*/
ret = 0;
key->hw_key_idx = WEP_INVALID_OFFSET;
}
IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
break;
case DISABLE_KEY:
if (is_default_wep_key)
ret = iwl_remove_default_wep_key(priv, ctx, key);
else
ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
break;
default:
ret = -EINVAL;
}
mutex_unlock(&priv->mutex);
IWL_DEBUG_MAC80211(priv, "leave\n");
return ret;
}
static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
{
if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
return false;
return true;
}
static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
{
if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
return false;
if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
return true;
/* disabled by default */
return false;
}
static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_ampdu_params *params)
{
struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
int ret = -EINVAL;
struct ieee80211_sta *sta = params->sta;
enum ieee80211_ampdu_mlme_action action = params->action;
u16 tid = params->tid;
u16 *ssn = &params->ssn;
u8 buf_size = params->buf_size;
struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
sta->addr, tid);
if (!(priv->nvm_data->sku_cap_11n_enable))
return -EACCES;
IWL_DEBUG_MAC80211(priv, "enter\n");
mutex_lock(&priv->mutex);
switch (action) {
case IEEE80211_AMPDU_RX_START:
if (!iwl_enable_rx_ampdu(priv->cfg))
break;
IWL_DEBUG_HT(priv, "start Rx\n");
ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
break;
case IEEE80211_AMPDU_RX_STOP:
IWL_DEBUG_HT(priv, "stop Rx\n");
ret = iwl_sta_rx_agg_stop(priv, sta, tid);
break;
case IEEE80211_AMPDU_TX_START:
if (!priv->trans->ops->txq_enable)
break;
if (!iwl_enable_tx_ampdu(priv->cfg))
break;
IWL_DEBUG_HT(priv, "start Tx\n");
ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
break;
case IEEE80211_AMPDU_TX_STOP_FLUSH:
case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
IWL_DEBUG_HT(priv, "Flush Tx\n");
ret = iwlagn_tx_agg_flush(priv, vif, sta, tid);
break;
case IEEE80211_AMPDU_TX_STOP_CONT:
IWL_DEBUG_HT(priv, "stop Tx\n");
ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
if ((ret == 0) && (priv->agg_tids_count > 0)) {
priv->agg_tids_count--;
IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
priv->agg_tids_count);
}
if (!priv->agg_tids_count &&
priv->hw_params.use_rts_for_aggregation) {
/*
* switch off RTS/CTS if it was previously enabled
*/
sta_priv->lq_sta.lq.general_params.flags &=
~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
&sta_priv->lq_sta.lq, CMD_ASYNC, false);
}
break;
case IEEE80211_AMPDU_TX_OPERATIONAL:
ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
break;
}
mutex_unlock(&priv->mutex);
IWL_DEBUG_MAC80211(priv, "leave\n");
return ret;
}
static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta)
{
struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
bool is_ap = vif->type == NL80211_IFTYPE_STATION;
int ret;
u8 sta_id;
IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
sta->addr);
sta_priv->sta_id = IWL_INVALID_STATION;
atomic_set(&sta_priv->pending_frames, 0);
if (vif->type == NL80211_IFTYPE_AP)
sta_priv->client = true;
ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
is_ap, sta, &sta_id);
if (ret) {
IWL_ERR(priv, "Unable to add station %pM (%d)\n",
sta->addr, ret);
/* Should we return success if return code is EEXIST ? */
return ret;
}
sta_priv->sta_id = sta_id;
return 0;
}
static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta)
{
struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
int ret;
IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
if (vif->type == NL80211_IFTYPE_STATION) {
/*
* Station will be removed from device when the RXON
* is set to unassociated -- just deactivate it here
* to avoid re-programming it.
*/
ret = 0;
iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
} else {
ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
if (ret)
IWL_DEBUG_QUIET_RFKILL(priv,
"Error removing station %pM\n", sta->addr);
}
return ret;
}
static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta,
enum ieee80211_sta_state old_state,
enum ieee80211_sta_state new_state)
{
struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
enum {
NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
} op = NONE;
int ret;
IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
sta->addr, old_state, new_state);
mutex_lock(&priv->mutex);
if (vif->type == NL80211_IFTYPE_STATION) {
if (old_state == IEEE80211_STA_NOTEXIST &&
new_state == IEEE80211_STA_NONE)
op = ADD;
else if (old_state == IEEE80211_STA_NONE &&
new_state == IEEE80211_STA_NOTEXIST)
op = REMOVE;
else if (old_state == IEEE80211_STA_AUTH &&
new_state == IEEE80211_STA_ASSOC)
op = HT_RATE_INIT;
} else {
if (old_state == IEEE80211_STA_AUTH &&
new_state == IEEE80211_STA_ASSOC)
op = ADD_RATE_INIT;
else if (old_state == IEEE80211_STA_ASSOC &&
new_state == IEEE80211_STA_AUTH)
op = REMOVE;
}
switch (op) {
case ADD:
ret = iwlagn_mac_sta_add(hw, vif, sta);
if (ret)
break;
/*
* Clear the in-progress flag, the AP station entry was added
* but we'll initialize LQ only when we've associated (which
* would also clear the in-progress flag). This is necessary
* in case we never initialize LQ because association fails.
*/
spin_lock_bh(&priv->sta_lock);
priv->stations[iwl_sta_id(sta)].used &=
~IWL_STA_UCODE_INPROGRESS;
spin_unlock_bh(&priv->sta_lock);
break;
case REMOVE:
ret = iwlagn_mac_sta_remove(hw, vif, sta);
break;
case ADD_RATE_INIT:
ret = iwlagn_mac_sta_add(hw, vif, sta);
if (ret)
break;
/* Initialize rate scaling */
IWL_DEBUG_INFO(priv,
"Initializing rate scaling for station %pM\n",
sta->addr);
iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
ret = 0;
break;
case HT_RATE_INIT:
/* Initialize rate scaling */
ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
if (ret)
break;
IWL_DEBUG_INFO(priv,
"Initializing rate scaling for station %pM\n",
sta->addr);
iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
ret = 0;
break;
default:
ret = 0;
break;
}
/*
* mac80211 might WARN if we fail, but due the way we
* (badly) handle hard rfkill, we might fail here
*/
if (iwl_is_rfkill(priv))
ret = 0;
mutex_unlock(&priv->mutex);
IWL_DEBUG_MAC80211(priv, "leave\n");
return ret;
}
static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_channel_switch *ch_switch)
{
struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
struct ieee80211_conf *conf = &hw->conf;
struct ieee80211_channel *channel = ch_switch->chandef.chan;
struct iwl_ht_config *ht_conf = &priv->current_ht_config;
/*
* MULTI-FIXME
* When we add support for multiple interfaces, we need to
* revisit this. The channel switch command in the device
* only affects the BSS context, but what does that really
* mean? And what if we get a CSA on the second interface?
* This needs a lot of work.
*/
struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
u16 ch;
IWL_DEBUG_MAC80211(priv, "enter\n");
mutex_lock(&priv->mutex);
if (iwl_is_rfkill(priv))
goto out;
if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
test_bit(STATUS_SCANNING, &priv->status) ||
test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
goto out;
if (!iwl_is_associated_ctx(ctx))
goto out;
if (!priv->lib->set_channel_switch)
goto out;
ch = channel->hw_value;
if (le16_to_cpu(ctx->active.channel) == ch)
goto out;
priv->current_ht_config.smps = conf->smps_mode;
/* Configure HT40 channels */
switch (cfg80211_get_chandef_type(&ch_switch->chandef)) {
case NL80211_CHAN_NO_HT:
case NL80211_CHAN_HT20:
ctx->ht.is_40mhz = false;
ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
break;
case NL80211_CHAN_HT40MINUS:
ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
ctx->ht.is_40mhz = true;
break;
case NL80211_CHAN_HT40PLUS:
ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
ctx->ht.is_40mhz = true;
break;
}
if ((le16_to_cpu(ctx->staging.channel) != ch))
ctx->staging.flags = 0;
iwl_set_rxon_channel(priv, channel, ctx);
iwl_set_rxon_ht(priv, ht_conf);
iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
/*
* at this point, staging_rxon has the
* configuration for channel switch
*/
set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
priv->switch_channel = cpu_to_le16(ch);
if (priv->lib->set_channel_switch(priv, ch_switch)) {
clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
priv->switch_channel = 0;
ieee80211_chswitch_done(ctx->vif, false);
}
out:
mutex_unlock(&priv->mutex);
IWL_DEBUG_MAC80211(priv, "leave\n");
}
void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
{
/*
* MULTI-FIXME
* See iwlagn_mac_channel_switch.
*/
struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
if (!test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
return;
if (ctx->vif)
ieee80211_chswitch_done(ctx->vif, is_success);
}
static void iwlagn_configure_filter(struct ieee80211_hw *hw,
unsigned int changed_flags,
unsigned int *total_flags,
u64 multicast)
{
struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
__le32 filter_or = 0, filter_nand = 0;
struct iwl_rxon_context *ctx;
#define CHK(test, flag) do { \
if (*total_flags & (test)) \
filter_or |= (flag); \
else \
filter_nand |= (flag); \
} while (0)
IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
changed_flags, *total_flags);
CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK);
/* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
#undef CHK
mutex_lock(&priv->mutex);
for_each_context(priv, ctx) {
ctx->staging.filter_flags &= ~filter_nand;
ctx->staging.filter_flags |= filter_or;
/*
* Not committing directly because hardware can perform a scan,
* but we'll eventually commit the filter flags change anyway.
*/
}
mutex_unlock(&priv->mutex);
/*
* Receiving all multicast frames is always enabled by the
* default flags setup in iwl_connection_init_rx_config()
* since we currently do not support programming multicast
* filters into the device.
*/
*total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI |
FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
}
static void iwlagn_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
u32 queues, bool drop)
{
struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
u32 scd_queues;
mutex_lock(&priv->mutex);
IWL_DEBUG_MAC80211(priv, "enter\n");
if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
goto done;
}
if (iwl_is_rfkill(priv)) {
IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
goto done;
}
scd_queues = BIT(priv->cfg->base_params->num_of_queues) - 1;
scd_queues &= ~(BIT(IWL_IPAN_CMD_QUEUE_NUM) |
BIT(IWL_DEFAULT_CMD_QUEUE_NUM));
if (drop) {
IWL_DEBUG_TX_QUEUES(priv, "Flushing SCD queues: 0x%x\n",
scd_queues);
if (iwlagn_txfifo_flush(priv, scd_queues)) {
IWL_ERR(priv, "flush request fail\n");
goto done;
}
}
IWL_DEBUG_TX_QUEUES(priv, "wait transmit/flush all frames\n");
iwl_trans_wait_tx_queue_empty(priv->trans, scd_queues);
done:
mutex_unlock(&priv->mutex);
IWL_DEBUG_MAC80211(priv, "leave\n");
}
static void iwlagn_mac_event_callback(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
const struct ieee80211_event *event)
{
struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
if (event->type != RSSI_EVENT)
return;
IWL_DEBUG_MAC80211(priv, "enter\n");
if (priv->lib->bt_params &&
priv->lib->bt_params->advanced_bt_coexist) {
if (event->u.rssi.data == RSSI_EVENT_LOW)
priv->bt_enable_pspoll = true;
else if (event->u.rssi.data == RSSI_EVENT_HIGH)
priv->bt_enable_pspoll = false;
queue_work(priv->workqueue, &priv->bt_runtime_config);
} else {
IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
"ignoring RSSI callback\n");
}
IWL_DEBUG_MAC80211(priv, "leave\n");
}
static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
struct ieee80211_sta *sta, bool set)
{
struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
queue_work(priv->workqueue, &priv->beacon_update);
return 0;
}
static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
struct ieee80211_vif *vif, u16 queue,
const struct ieee80211_tx_queue_params *params)
{
struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
struct iwl_rxon_context *ctx = vif_priv->ctx;
int q;
if (WARN_ON(!ctx))
return -EINVAL;
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;
mutex_lock(&priv->mutex);
ctx->qos_data.def_qos_parm.ac[q].cw_min =
cpu_to_le16(params->cw_min);
ctx->qos_data.def_qos_parm.ac[q].cw_max =
cpu_to_le16(params->cw_max);
ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
ctx->qos_data.def_qos_parm.ac[q].edca_txop =
cpu_to_le16((params->txop * 32));
ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
mutex_unlock(&priv->mutex);
IWL_DEBUG_MAC80211(priv, "leave\n");
return 0;
}
static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
{
struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
return priv->ibss_manager == IWL_IBSS_MANAGER;
}
static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
{
iwl_connection_init_rx_config(priv, ctx);
iwlagn_set_rxon_chain(priv, ctx);
return iwlagn_commit_rxon(priv, ctx);
}
static int iwl_setup_interface(struct iwl_priv *priv,
struct iwl_rxon_context *ctx)
{
struct ieee80211_vif *vif = ctx->vif;
int err, ac;
lockdep_assert_held(&priv->mutex);
/*
* This variable will be correct only when there's just
* a single context, but all code using it is for hardware
* that supports only one context.
*/
priv->iw_mode = vif->type;
ctx->is_active = true;
err = iwl_set_mode(priv, ctx);
if (err) {
if (!ctx->always_active)
ctx->is_active = false;
return err;
}
if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist &&
vif->type == NL80211_IFTYPE_ADHOC) {
/*
* pretend to have high BT traffic as long as we
* are operating in IBSS mode, as this will cause
* the rate scaling etc. to behave as intended.
*/
priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
}
/* set up queue mappings */
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
vif->hw_queue[ac] = ctx->ac_to_queue[ac];
if (vif->type == NL80211_IFTYPE_AP)
vif->cab_queue = ctx->mcast_queue;
else
vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
return 0;
}
static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
struct iwl_rxon_context *tmp, *ctx = NULL;
int err;
enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
bool reset = false;
IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
viftype, vif->addr);
mutex_lock(&priv->mutex);
if (!iwl_is_ready_rf(priv)) {
IWL_WARN(priv, "Try to add interface when device not ready\n");
err = -EINVAL;
goto out;
}
for_each_context(priv, tmp) {
u32 possible_modes =
tmp->interface_modes | tmp->exclusive_interface_modes;
if (tmp->vif) {
/* On reset we need to add the same interface again */
if (tmp->vif == vif) {
reset = true;
ctx = tmp;
break;
}
/* check if this busy context is exclusive */
if (tmp->exclusive_interface_modes &
BIT(tmp->vif->type)) {
err = -EINVAL;
goto out;
}
continue;
}
if (!(possible_modes & BIT(viftype)))
continue;
/* have maybe usable context w/o interface */
ctx = tmp;
break;
}
if (!ctx) {
err = -EOPNOTSUPP;
goto out;
}
vif_priv->ctx = ctx;
ctx->vif = vif;
/*
* In SNIFFER device type, the firmware reports the FCS to
* the host, rather than snipping it off. Unfortunately,
* mac80211 doesn't (yet) provide a per-packet flag for
* this, so that we have to set the hardware flag based
* on the interfaces added. As the monitor interface can
* only be present by itself, and will be removed before
* other interfaces are added, this is safe.
*/
if (vif->type == NL80211_IFTYPE_MONITOR)
ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS);
else
__clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, priv->hw->flags);
err = iwl_setup_interface(priv, ctx);
if (!err || reset)
goto out;
ctx->vif = NULL;
priv->iw_mode = NL80211_IFTYPE_STATION;
out:
mutex_unlock(&priv->mutex);
IWL_DEBUG_MAC80211(priv, "leave\n");
return err;
}
static void iwl_teardown_interface(struct iwl_priv *priv,
struct ieee80211_vif *vif,
bool mode_change)
{
struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
lockdep_assert_held(&priv->mutex);
if (priv->scan_vif == vif) {
iwl_scan_cancel_timeout(priv, 200);
iwl_force_scan_end(priv);
}
if (!mode_change) {
iwl_set_mode(priv, ctx);
if (!ctx->always_active)
ctx->is_active = false;
}
/*
* When removing the IBSS interface, overwrite the
* BT traffic load with the stored one from the last
* notification, if any. If this is a device that
* doesn't implement this, this has no effect since
* both values are the same and zero.
*/
if (vif->type == NL80211_IFTYPE_ADHOC)
priv->bt_traffic_load = priv->last_bt_traffic_load;
}
static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
IWL_DEBUG_MAC80211(priv, "enter\n");
mutex_lock(&priv->mutex);
WARN_ON(ctx->vif != vif);
ctx->vif = NULL;
iwl_teardown_interface(priv, vif, false);
mutex_unlock(&priv->mutex);
IWL_DEBUG_MAC80211(priv, "leave\n");
}
static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
enum nl80211_iftype newtype, bool newp2p)
{
struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
struct iwl_rxon_context *ctx, *tmp;
enum nl80211_iftype newviftype = newtype;
u32 interface_modes;
int err;
IWL_DEBUG_MAC80211(priv, "enter\n");
newtype = ieee80211_iftype_p2p(newtype, newp2p);
mutex_lock(&priv->mutex);
ctx = iwl_rxon_ctx_from_vif(vif);
/*
* To simplify this code, only support changes on the
* BSS context. The PAN context is usually reassigned
* by creating/removing P2P interfaces anyway.
*/
if (ctx->ctxid != IWL_RXON_CTX_BSS) {
err = -EBUSY;
goto out;
}
if (!ctx->vif || !iwl_is_ready_rf(priv)) {
/*
* Huh? But wait ... this can maybe happen when
* we're in the middle of a firmware restart!
*/
err = -EBUSY;
goto out;
}
/* Check if the switch is supported in the same context */
interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
if (!(interface_modes & BIT(newtype))) {
err = -EBUSY;
goto out;
}
if (ctx->exclusive_interface_modes & BIT(newtype)) {
for_each_context(priv, tmp) {
if (ctx == tmp)
continue;
if (!tmp->is_active)
continue;
/*
* The current mode switch would be exclusive, but
* another context is active ... refuse the switch.
*/
err = -EBUSY;
goto out;
}
}
/* success */
iwl_teardown_interface(priv, vif, true);
vif->type = newviftype;
vif->p2p = newp2p;
err = iwl_setup_interface(priv, ctx);
WARN_ON(err);
/*
* We've switched internally, but submitting to the
* device may have failed for some reason. Mask this
* error, because otherwise mac80211 will not switch
* (and set the interface type back) and we'll be
* out of sync with it.
*/
err = 0;
out:
mutex_unlock(&priv->mutex);
IWL_DEBUG_MAC80211(priv, "leave\n");
return err;
}
static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_scan_request *hw_req)
{
struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
struct cfg80211_scan_request *req = &hw_req->req;
int ret;
IWL_DEBUG_MAC80211(priv, "enter\n");
if (req->n_channels == 0)
return -EINVAL;
mutex_lock(&priv->mutex);
/*
* If an internal scan is in progress, just set
* up the scan_request as per above.
*/
if (priv->scan_type != IWL_SCAN_NORMAL) {
IWL_DEBUG_SCAN(priv,
"SCAN request during internal scan - defer\n");
priv->scan_request = req;
priv->scan_vif = vif;
ret = 0;
} else {
priv->scan_request = req;
priv->scan_vif = vif;
/*
* mac80211 will only ask for one band at a time
* so using channels[0] here is ok
*/
ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
req->channels[0]->band);
if (ret) {
priv->scan_request = NULL;
priv->scan_vif = NULL;
}
}
IWL_DEBUG_MAC80211(priv, "leave\n");
mutex_unlock(&priv->mutex);
return ret;
}
static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
{
struct iwl_addsta_cmd cmd = {
.mode = STA_CONTROL_MODIFY_MSK,
.station_flags_msk = STA_FLG_PWR_SAVE_MSK,
.sta.sta_id = sta_id,
};
iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
}
static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
enum sta_notify_cmd cmd,
struct ieee80211_sta *sta)
{
struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
int sta_id;
IWL_DEBUG_MAC80211(priv, "enter\n");
switch (cmd) {
case STA_NOTIFY_SLEEP:
WARN_ON(!sta_priv->client);
sta_priv->asleep = true;
if (atomic_read(&sta_priv->pending_frames) > 0)
ieee80211_sta_block_awake(hw, sta, true);
break;
case STA_NOTIFY_AWAKE:
WARN_ON(!sta_priv->client);
if (!sta_priv->asleep)
break;
sta_priv->asleep = false;
sta_id = iwl_sta_id(sta);
if (sta_id != IWL_INVALID_STATION)
iwl_sta_modify_ps_wake(priv, sta_id);
break;
default:
break;
}
IWL_DEBUG_MAC80211(priv, "leave\n");
}
const struct ieee80211_ops iwlagn_hw_ops = {
.tx = iwlagn_mac_tx,
.start = iwlagn_mac_start,
.stop = iwlagn_mac_stop,
#ifdef CONFIG_PM_SLEEP
.suspend = iwlagn_mac_suspend,
.resume = iwlagn_mac_resume,
.set_wakeup = iwlagn_mac_set_wakeup,
#endif
.add_interface = iwlagn_mac_add_interface,
.remove_interface = iwlagn_mac_remove_interface,
.change_interface = iwlagn_mac_change_interface,
.config = iwlagn_mac_config,
.configure_filter = iwlagn_configure_filter,
.set_key = iwlagn_mac_set_key,
.update_tkip_key = iwlagn_mac_update_tkip_key,
.set_rekey_data = iwlagn_mac_set_rekey_data,
.conf_tx = iwlagn_mac_conf_tx,
.bss_info_changed = iwlagn_bss_info_changed,
.ampdu_action = iwlagn_mac_ampdu_action,
.hw_scan = iwlagn_mac_hw_scan,
.sta_notify = iwlagn_mac_sta_notify,
.sta_state = iwlagn_mac_sta_state,
.channel_switch = iwlagn_mac_channel_switch,
.flush = iwlagn_mac_flush,
.tx_last_beacon = iwlagn_mac_tx_last_beacon,
.event_callback = iwlagn_mac_event_callback,
.set_tim = iwlagn_mac_set_tim,
};
/* This function both allocates and initializes hw and priv. */
struct ieee80211_hw *iwl_alloc_all(void)
{
struct iwl_priv *priv;
struct iwl_op_mode *op_mode;
/* mac80211 allocates memory for this device instance, including
* space for this driver's private structure */
struct ieee80211_hw *hw;
hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
if (!hw)
goto out;
op_mode = hw->priv;
priv = IWL_OP_MODE_GET_DVM(op_mode);
priv->hw = hw;
out:
return hw;
}
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