iwlwifi: move under intel vendor directory

Part of reorganising wireless drivers directory and Kconfig.

Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

1 files changed, 340 insertions, 0 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/sf.c b/drivers/net/wireless/intel/iwlwifi/mvm/sf.c
new file mode 100644
index 000000000000..b0f59fdd287c
--- /dev/null
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/sf.c
@@ -0,0 +1,340 @@
+/******************************************************************************
+ *
+ * This file is provided under a dual BSD/GPLv2 license.  When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2013 - 2014 Intel Corporation. All rights reserved.
+ * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
+ * USA
+ *
+ * The full GNU General Public License is included in this distribution
+ * in the file called COPYING.
+ *
+ * Contact Information:
+ *  Intel Linux Wireless <ilw@linux.intel.com>
+ * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2013 - 2014 Intel Corporation. All rights reserved.
+ * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *  * Neither the name Intel Corporation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *****************************************************************************/
+#include "mvm.h"
+
+/* For counting bound interfaces */
+struct iwl_mvm_active_iface_iterator_data {
+        struct ieee80211_vif *ignore_vif;
+        u8 sta_vif_ap_sta_id;
+        enum iwl_sf_state sta_vif_state;
+        int num_active_macs;
+};
+
+/*
+ * Count bound interfaces which are not p2p, besides data->ignore_vif.
+ * data->station_vif will point to one bound vif of type station, if exists.
+ */
+static void iwl_mvm_bound_iface_iterator(void *_data, u8 *mac,
+                                         struct ieee80211_vif *vif)
+{
+        struct iwl_mvm_active_iface_iterator_data *data = _data;
+        struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
+
+        if (vif == data->ignore_vif || !mvmvif->phy_ctxt ||
+            vif->type == NL80211_IFTYPE_P2P_DEVICE)
+                return;
+
+        data->num_active_macs++;
+
+        if (vif->type == NL80211_IFTYPE_STATION) {
+                data->sta_vif_ap_sta_id = mvmvif->ap_sta_id;
+                if (vif->bss_conf.assoc)
+                        data->sta_vif_state = SF_FULL_ON;
+                else
+                        data->sta_vif_state = SF_INIT_OFF;
+        }
+}
+
+/*
+ * Aging and idle timeouts for the different possible scenarios
+ * in default configuration
+ */
+static const
+__le32 sf_full_timeout_def[SF_NUM_SCENARIO][SF_NUM_TIMEOUT_TYPES] = {
+        {
+                cpu_to_le32(SF_SINGLE_UNICAST_AGING_TIMER_DEF),
+                cpu_to_le32(SF_SINGLE_UNICAST_IDLE_TIMER_DEF)
+        },
+        {
+                cpu_to_le32(SF_AGG_UNICAST_AGING_TIMER_DEF),
+                cpu_to_le32(SF_AGG_UNICAST_IDLE_TIMER_DEF)
+        },
+        {
+                cpu_to_le32(SF_MCAST_AGING_TIMER_DEF),
+                cpu_to_le32(SF_MCAST_IDLE_TIMER_DEF)
+        },
+        {
+                cpu_to_le32(SF_BA_AGING_TIMER_DEF),
+                cpu_to_le32(SF_BA_IDLE_TIMER_DEF)
+        },
+        {
+                cpu_to_le32(SF_TX_RE_AGING_TIMER_DEF),
+                cpu_to_le32(SF_TX_RE_IDLE_TIMER_DEF)
+        },
+};
+
+/*
+ * Aging and idle timeouts for the different possible scenarios
+ * in single BSS MAC configuration.
+ */
+static const __le32 sf_full_timeout[SF_NUM_SCENARIO][SF_NUM_TIMEOUT_TYPES] = {
+        {
+                cpu_to_le32(SF_SINGLE_UNICAST_AGING_TIMER),
+                cpu_to_le32(SF_SINGLE_UNICAST_IDLE_TIMER)
+        },
+        {
+                cpu_to_le32(SF_AGG_UNICAST_AGING_TIMER),
+                cpu_to_le32(SF_AGG_UNICAST_IDLE_TIMER)
+        },
+        {
+                cpu_to_le32(SF_MCAST_AGING_TIMER),
+                cpu_to_le32(SF_MCAST_IDLE_TIMER)
+        },
+        {
+                cpu_to_le32(SF_BA_AGING_TIMER),
+                cpu_to_le32(SF_BA_IDLE_TIMER)
+        },
+        {
+                cpu_to_le32(SF_TX_RE_AGING_TIMER),
+                cpu_to_le32(SF_TX_RE_IDLE_TIMER)
+        },
+};
+
+static void iwl_mvm_fill_sf_command(struct iwl_mvm *mvm,
+                                    struct iwl_sf_cfg_cmd *sf_cmd,
+                                    struct ieee80211_sta *sta)
+{
+        int i, j, watermark;
+
+        sf_cmd->watermark[SF_LONG_DELAY_ON] = cpu_to_le32(SF_W_MARK_SCAN);
+
+        /*
+         * If we are in association flow - check antenna configuration
+         * capabilities of the AP station, and choose the watermark accordingly.
+         */
+        if (sta) {
+                if (sta->ht_cap.ht_supported || sta->vht_cap.vht_supported) {
+                        switch (sta->rx_nss) {
+                        case 1:
+                                watermark = SF_W_MARK_SISO;
+                                break;
+                        case 2:
+                                watermark = SF_W_MARK_MIMO2;
+                                break;
+                        default:
+                                watermark = SF_W_MARK_MIMO3;
+                                break;
+                        }
+                } else {
+                        watermark = SF_W_MARK_LEGACY;
+                }
+        /* default watermark value for unassociated mode. */
+        } else {
+                watermark = SF_W_MARK_MIMO2;
+        }
+        sf_cmd->watermark[SF_FULL_ON] = cpu_to_le32(watermark);
+
+        for (i = 0; i < SF_NUM_SCENARIO; i++) {
+                for (j = 0; j < SF_NUM_TIMEOUT_TYPES; j++) {
+                        sf_cmd->long_delay_timeouts[i][j] =
+                                        cpu_to_le32(SF_LONG_DELAY_AGING_TIMER);
+                }
+        }
+
+        if (sta || IWL_UCODE_API(mvm->fw->ucode_ver) < 13) {
+                BUILD_BUG_ON(sizeof(sf_full_timeout) !=
+                             sizeof(__le32) * SF_NUM_SCENARIO *
+                             SF_NUM_TIMEOUT_TYPES);
+
+                memcpy(sf_cmd->full_on_timeouts, sf_full_timeout,
+                       sizeof(sf_full_timeout));
+        } else {
+                BUILD_BUG_ON(sizeof(sf_full_timeout_def) !=
+                             sizeof(__le32) * SF_NUM_SCENARIO *
+                             SF_NUM_TIMEOUT_TYPES);
+
+                memcpy(sf_cmd->full_on_timeouts, sf_full_timeout_def,
+                       sizeof(sf_full_timeout_def));
+        }
+
+}
+
+static int iwl_mvm_sf_config(struct iwl_mvm *mvm, u8 sta_id,
+                             enum iwl_sf_state new_state)
+{
+        struct iwl_sf_cfg_cmd sf_cmd = {
+                .state = cpu_to_le32(SF_FULL_ON),
+        };
+        struct ieee80211_sta *sta;
+        int ret = 0;
+
+        if (IWL_UCODE_API(mvm->fw->ucode_ver) < 13)
+                sf_cmd.state = cpu_to_le32(new_state);
+
+        if (mvm->cfg->disable_dummy_notification)
+                sf_cmd.state |= cpu_to_le32(SF_CFG_DUMMY_NOTIF_OFF);
+
+        /*
+         * If an associated AP sta changed its antenna configuration, the state
+         * will remain FULL_ON but SF parameters need to be reconsidered.
+         */
+        if (new_state != SF_FULL_ON && mvm->sf_state == new_state)
+                return 0;
+
+        switch (new_state) {
+        case SF_UNINIT:
+                if (IWL_UCODE_API(mvm->fw->ucode_ver) >= 13)
+                        iwl_mvm_fill_sf_command(mvm, &sf_cmd, NULL);
+                break;
+        case SF_FULL_ON:
+                if (sta_id == IWL_MVM_STATION_COUNT) {
+                        IWL_ERR(mvm,
+                                "No station: Cannot switch SF to FULL_ON\n");
+                        return -EINVAL;
+                }
+                rcu_read_lock();
+                sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
+                if (IS_ERR_OR_NULL(sta)) {
+                        IWL_ERR(mvm, "Invalid station id\n");
+                        rcu_read_unlock();
+                        return -EINVAL;
+                }
+                iwl_mvm_fill_sf_command(mvm, &sf_cmd, sta);
+                rcu_read_unlock();
+                break;
+        case SF_INIT_OFF:
+                iwl_mvm_fill_sf_command(mvm, &sf_cmd, NULL);
+                break;
+        default:
+                WARN_ONCE(1, "Invalid state: %d. not sending Smart Fifo cmd\n",
+                          new_state);
+                return -EINVAL;
+        }
+
+        ret = iwl_mvm_send_cmd_pdu(mvm, REPLY_SF_CFG_CMD, CMD_ASYNC,
+                                   sizeof(sf_cmd), &sf_cmd);
+        if (!ret)
+                mvm->sf_state = new_state;
+
+        return ret;
+}
+
+/*
+ * Update Smart fifo:
+ * Count bound interfaces that are not to be removed, ignoring p2p devices,
+ * and set new state accordingly.
+ */
+int iwl_mvm_sf_update(struct iwl_mvm *mvm, struct ieee80211_vif *changed_vif,
+                      bool remove_vif)
+{
+        enum iwl_sf_state new_state;
+        u8 sta_id = IWL_MVM_STATION_COUNT;
+        struct iwl_mvm_vif *mvmvif = NULL;
+        struct iwl_mvm_active_iface_iterator_data data = {
+                .ignore_vif = changed_vif,
+                .sta_vif_state = SF_UNINIT,
+                .sta_vif_ap_sta_id = IWL_MVM_STATION_COUNT,
+        };
+
+        /*
+         * Ignore the call if we are in HW Restart flow, or if the handled
+         * vif is a p2p device.
+         */
+        if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) ||
+            (changed_vif && changed_vif->type == NL80211_IFTYPE_P2P_DEVICE))
+                return 0;
+
+        ieee80211_iterate_active_interfaces_atomic(mvm->hw,
+                                                   IEEE80211_IFACE_ITER_NORMAL,
+                                                   iwl_mvm_bound_iface_iterator,
+                                                   &data);
+
+        /* If changed_vif exists and is not to be removed, add to the count */
+        if (changed_vif && !remove_vif)
+                data.num_active_macs++;
+
+        switch (data.num_active_macs) {
+        case 0:
+                /* If there are no active macs - change state to SF_INIT_OFF */
+                new_state = SF_INIT_OFF;
+                break;
+        case 1:
+                if (remove_vif) {
+                        /* The one active mac left is of type station
+                         * and we filled the relevant data during iteration
+                         */
+                        new_state = data.sta_vif_state;
+                        sta_id = data.sta_vif_ap_sta_id;
+                } else {
+                        if (WARN_ON(!changed_vif))
+                                return -EINVAL;
+                        if (changed_vif->type != NL80211_IFTYPE_STATION) {
+                                new_state = SF_UNINIT;
+                        } else if (changed_vif->bss_conf.assoc &&
+                                   changed_vif->bss_conf.dtim_period) {
+                                mvmvif = iwl_mvm_vif_from_mac80211(changed_vif);
+                                sta_id = mvmvif->ap_sta_id;
+                                new_state = SF_FULL_ON;
+                        } else {
+                                new_state = SF_INIT_OFF;
+                        }
+                }
+                break;
+        default:
+                /* If there are multiple active macs - change to SF_UNINIT */
+                new_state = SF_UNINIT;
+        }
+        return iwl_mvm_sf_config(mvm, sta_id, new_state);
+}