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, 460 insertions, 0 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/tt.c b/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
new file mode 100644
index 000000000000..cadfc0460597
--- /dev/null
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
@@ -0,0 +1,460 @@
+/******************************************************************************
+ *
+ * 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) 2012 - 2014 Intel Corporation. All rights reserved.
+ * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
+ * Copyright(c) 2015 Intel Deutschland 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"
+
+#define IWL_MVM_TEMP_NOTIF_WAIT_TIMEOUT HZ
+
+static void iwl_mvm_enter_ctkill(struct iwl_mvm *mvm)
+{
+        struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle;
+        u32 duration = tt->params.ct_kill_duration;
+
+        if (test_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status))
+                return;
+
+        IWL_ERR(mvm, "Enter CT Kill\n");
+        iwl_mvm_set_hw_ctkill_state(mvm, true);
+
+        tt->throttle = false;
+        tt->dynamic_smps = false;
+
+        /* Don't schedule an exit work if we're in test mode, since
+         * the temperature will not change unless we manually set it
+         * again (or disable testing).
+         */
+        if (!mvm->temperature_test)
+                schedule_delayed_work(&tt->ct_kill_exit,
+                                      round_jiffies_relative(duration * HZ));
+}
+
+static void iwl_mvm_exit_ctkill(struct iwl_mvm *mvm)
+{
+        if (!test_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status))
+                return;
+
+        IWL_ERR(mvm, "Exit CT Kill\n");
+        iwl_mvm_set_hw_ctkill_state(mvm, false);
+}
+
+void iwl_mvm_tt_temp_changed(struct iwl_mvm *mvm, u32 temp)
+{
+        /* ignore the notification if we are in test mode */
+        if (mvm->temperature_test)
+                return;
+
+        if (mvm->temperature == temp)
+                return;
+
+        mvm->temperature = temp;
+        iwl_mvm_tt_handler(mvm);
+}
+
+static int iwl_mvm_temp_notif_parse(struct iwl_mvm *mvm,
+                                    struct iwl_rx_packet *pkt)
+{
+        struct iwl_dts_measurement_notif *notif;
+        int len = iwl_rx_packet_payload_len(pkt);
+        int temp;
+
+        if (WARN_ON_ONCE(len != sizeof(*notif))) {
+                IWL_ERR(mvm, "Invalid DTS_MEASUREMENT_NOTIFICATION\n");
+                return -EINVAL;
+        }
+
+        notif = (void *)pkt->data;
+
+        temp = le32_to_cpu(notif->temp);
+
+        /* shouldn't be negative, but since it's s32, make sure it isn't */
+        if (WARN_ON_ONCE(temp < 0))
+                temp = 0;
+
+        IWL_DEBUG_TEMP(mvm, "DTS_MEASUREMENT_NOTIFICATION - %d\n", temp);
+
+        return temp;
+}
+
+static bool iwl_mvm_temp_notif_wait(struct iwl_notif_wait_data *notif_wait,
+                                    struct iwl_rx_packet *pkt, void *data)
+{
+        struct iwl_mvm *mvm =
+                container_of(notif_wait, struct iwl_mvm, notif_wait);
+        int *temp = data;
+        int ret;
+
+        ret = iwl_mvm_temp_notif_parse(mvm, pkt);
+        if (ret < 0)
+                return true;
+
+        *temp = ret;
+
+        return true;
+}
+
+void iwl_mvm_temp_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
+{
+        struct iwl_rx_packet *pkt = rxb_addr(rxb);
+        int temp;
+
+        /* the notification is handled synchronously in ctkill, so skip here */
+        if (test_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status))
+                return;
+
+        temp = iwl_mvm_temp_notif_parse(mvm, pkt);
+        if (temp < 0)
+                return;
+
+        iwl_mvm_tt_temp_changed(mvm, temp);
+}
+
+static int iwl_mvm_get_temp_cmd(struct iwl_mvm *mvm)
+{
+        struct iwl_dts_measurement_cmd cmd = {
+                .flags = cpu_to_le32(DTS_TRIGGER_CMD_FLAGS_TEMP),
+        };
+        struct iwl_ext_dts_measurement_cmd extcmd = {
+                .control_mode = cpu_to_le32(DTS_AUTOMATIC),
+        };
+        u32 cmdid;
+
+        if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_WIDE_CMD_HDR))
+                cmdid = iwl_cmd_id(CMD_DTS_MEASUREMENT_TRIGGER_WIDE,
+                                   PHY_OPS_GROUP, 0);
+        else
+                cmdid = CMD_DTS_MEASUREMENT_TRIGGER;
+
+        if (!fw_has_capa(&mvm->fw->ucode_capa,
+                         IWL_UCODE_TLV_CAPA_EXTENDED_DTS_MEASURE))
+                return iwl_mvm_send_cmd_pdu(mvm, cmdid, 0, sizeof(cmd), &cmd);
+
+        return iwl_mvm_send_cmd_pdu(mvm, cmdid, 0, sizeof(extcmd), &extcmd);
+}
+
+int iwl_mvm_get_temp(struct iwl_mvm *mvm)
+{
+        struct iwl_notification_wait wait_temp_notif;
+        static u16 temp_notif[] = { WIDE_ID(PHY_OPS_GROUP,
+                                            DTS_MEASUREMENT_NOTIF_WIDE) };
+        int ret, temp;
+
+        if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_WIDE_CMD_HDR))
+                temp_notif[0] = DTS_MEASUREMENT_NOTIFICATION;
+
+        lockdep_assert_held(&mvm->mutex);
+
+        iwl_init_notification_wait(&mvm->notif_wait, &wait_temp_notif,
+                                   temp_notif, ARRAY_SIZE(temp_notif),
+                                   iwl_mvm_temp_notif_wait, &temp);
+
+        ret = iwl_mvm_get_temp_cmd(mvm);
+        if (ret) {
+                IWL_ERR(mvm, "Failed to get the temperature (err=%d)\n", ret);
+                iwl_remove_notification(&mvm->notif_wait, &wait_temp_notif);
+                return ret;
+        }
+
+        ret = iwl_wait_notification(&mvm->notif_wait, &wait_temp_notif,
+                                    IWL_MVM_TEMP_NOTIF_WAIT_TIMEOUT);
+        if (ret) {
+                IWL_ERR(mvm, "Getting the temperature timed out\n");
+                return ret;
+        }
+
+        return temp;
+}
+
+static void check_exit_ctkill(struct work_struct *work)
+{
+        struct iwl_mvm_tt_mgmt *tt;
+        struct iwl_mvm *mvm;
+        u32 duration;
+        s32 temp;
+
+        tt = container_of(work, struct iwl_mvm_tt_mgmt, ct_kill_exit.work);
+        mvm = container_of(tt, struct iwl_mvm, thermal_throttle);
+
+        duration = tt->params.ct_kill_duration;
+
+        mutex_lock(&mvm->mutex);
+
+        if (__iwl_mvm_mac_start(mvm))
+                goto reschedule;
+
+        /* make sure the device is available for direct read/writes */
+        if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_CHECK_CTKILL)) {
+                __iwl_mvm_mac_stop(mvm);
+                goto reschedule;
+        }
+
+        temp = iwl_mvm_get_temp(mvm);
+
+        iwl_mvm_unref(mvm, IWL_MVM_REF_CHECK_CTKILL);
+
+        __iwl_mvm_mac_stop(mvm);
+
+        if (temp < 0)
+                goto reschedule;
+
+        IWL_DEBUG_TEMP(mvm, "NIC temperature: %d\n", temp);
+
+        if (temp <= tt->params.ct_kill_exit) {
+                mutex_unlock(&mvm->mutex);
+                iwl_mvm_exit_ctkill(mvm);
+                return;
+        }
+
+reschedule:
+        mutex_unlock(&mvm->mutex);
+        schedule_delayed_work(&mvm->thermal_throttle.ct_kill_exit,
+                              round_jiffies(duration * HZ));
+}
+
+static void iwl_mvm_tt_smps_iterator(void *_data, u8 *mac,
+                                     struct ieee80211_vif *vif)
+{
+        struct iwl_mvm *mvm = _data;
+        enum ieee80211_smps_mode smps_mode;
+
+        lockdep_assert_held(&mvm->mutex);
+
+        if (mvm->thermal_throttle.dynamic_smps)
+                smps_mode = IEEE80211_SMPS_DYNAMIC;
+        else
+                smps_mode = IEEE80211_SMPS_AUTOMATIC;
+
+        if (vif->type != NL80211_IFTYPE_STATION)
+                return;
+
+        iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT, smps_mode);
+}
+
+static void iwl_mvm_tt_tx_protection(struct iwl_mvm *mvm, bool enable)
+{
+        struct ieee80211_sta *sta;
+        struct iwl_mvm_sta *mvmsta;
+        int i, err;
+
+        for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
+                sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
+                                                lockdep_is_held(&mvm->mutex));
+                if (IS_ERR_OR_NULL(sta))
+                        continue;
+                mvmsta = iwl_mvm_sta_from_mac80211(sta);
+                if (enable == mvmsta->tt_tx_protection)
+                        continue;
+                err = iwl_mvm_tx_protection(mvm, mvmsta, enable);
+                if (err) {
+                        IWL_ERR(mvm, "Failed to %s Tx protection\n",
+                                enable ? "enable" : "disable");
+                } else {
+                        IWL_DEBUG_TEMP(mvm, "%s Tx protection\n",
+                                       enable ? "Enable" : "Disable");
+                        mvmsta->tt_tx_protection = enable;
+                }
+        }
+}
+
+void iwl_mvm_tt_tx_backoff(struct iwl_mvm *mvm, u32 backoff)
+{
+        struct iwl_host_cmd cmd = {
+                .id = REPLY_THERMAL_MNG_BACKOFF,
+                .len = { sizeof(u32), },
+                .data = { &backoff, },
+        };
+
+        backoff = max(backoff, mvm->thermal_throttle.min_backoff);
+
+        if (iwl_mvm_send_cmd(mvm, &cmd) == 0) {
+                IWL_DEBUG_TEMP(mvm, "Set Thermal Tx backoff to: %u\n",
+                               backoff);
+                mvm->thermal_throttle.tx_backoff = backoff;
+        } else {
+                IWL_ERR(mvm, "Failed to change Thermal Tx backoff\n");
+        }
+}
+
+void iwl_mvm_tt_handler(struct iwl_mvm *mvm)
+{
+        struct iwl_tt_params *params = &mvm->thermal_throttle.params;
+        struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle;
+        s32 temperature = mvm->temperature;
+        bool throttle_enable = false;
+        int i;
+        u32 tx_backoff;
+
+        IWL_DEBUG_TEMP(mvm, "NIC temperature: %d\n", mvm->temperature);
+
+        if (params->support_ct_kill && temperature >= params->ct_kill_entry) {
+                iwl_mvm_enter_ctkill(mvm);
+                return;
+        }
+
+        if (params->support_ct_kill &&
+            temperature <= params->ct_kill_exit) {
+                iwl_mvm_exit_ctkill(mvm);
+                return;
+        }
+
+        if (params->support_dynamic_smps) {
+                if (!tt->dynamic_smps &&
+                    temperature >= params->dynamic_smps_entry) {
+                        IWL_DEBUG_TEMP(mvm, "Enable dynamic SMPS\n");
+                        tt->dynamic_smps = true;
+                        ieee80211_iterate_active_interfaces_atomic(
+                                        mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
+                                        iwl_mvm_tt_smps_iterator, mvm);
+                        throttle_enable = true;
+                } else if (tt->dynamic_smps &&
+                           temperature <= params->dynamic_smps_exit) {
+                        IWL_DEBUG_TEMP(mvm, "Disable dynamic SMPS\n");
+                        tt->dynamic_smps = false;
+                        ieee80211_iterate_active_interfaces_atomic(
+                                        mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
+                                        iwl_mvm_tt_smps_iterator, mvm);
+                }
+        }
+
+        if (params->support_tx_protection) {
+                if (temperature >= params->tx_protection_entry) {
+                        iwl_mvm_tt_tx_protection(mvm, true);
+                        throttle_enable = true;
+                } else if (temperature <= params->tx_protection_exit) {
+                        iwl_mvm_tt_tx_protection(mvm, false);
+                }
+        }
+
+        if (params->support_tx_backoff) {
+                tx_backoff = tt->min_backoff;
+                for (i = 0; i < TT_TX_BACKOFF_SIZE; i++) {
+                        if (temperature < params->tx_backoff[i].temperature)
+                                break;
+                        tx_backoff = max(tt->min_backoff,
+                                         params->tx_backoff[i].backoff);
+                }
+                if (tx_backoff != tt->min_backoff)
+                        throttle_enable = true;
+                if (tt->tx_backoff != tx_backoff)
+                        iwl_mvm_tt_tx_backoff(mvm, tx_backoff);
+        }
+
+        if (!tt->throttle && throttle_enable) {
+                IWL_WARN(mvm,
+                         "Due to high temperature thermal throttling initiated\n");
+                tt->throttle = true;
+        } else if (tt->throttle && !tt->dynamic_smps &&
+                   tt->tx_backoff == tt->min_backoff &&
+                   temperature <= params->tx_protection_exit) {
+                IWL_WARN(mvm,
+                         "Temperature is back to normal thermal throttling stopped\n");
+                tt->throttle = false;
+        }
+}
+
+static const struct iwl_tt_params iwl_mvm_default_tt_params = {
+        .ct_kill_entry = 118,
+        .ct_kill_exit = 96,
+        .ct_kill_duration = 5,
+        .dynamic_smps_entry = 114,
+        .dynamic_smps_exit = 110,
+        .tx_protection_entry = 114,
+        .tx_protection_exit = 108,
+        .tx_backoff = {
+                {.temperature = 112, .backoff = 200},
+                {.temperature = 113, .backoff = 600},
+                {.temperature = 114, .backoff = 1200},
+                {.temperature = 115, .backoff = 2000},
+                {.temperature = 116, .backoff = 4000},
+                {.temperature = 117, .backoff = 10000},
+        },
+        .support_ct_kill = true,
+        .support_dynamic_smps = true,
+        .support_tx_protection = true,
+        .support_tx_backoff = true,
+};
+
+void iwl_mvm_tt_initialize(struct iwl_mvm *mvm, u32 min_backoff)
+{
+        struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle;
+
+        IWL_DEBUG_TEMP(mvm, "Initialize Thermal Throttling\n");
+
+        if (mvm->cfg->thermal_params)
+                tt->params = *mvm->cfg->thermal_params;
+        else
+                tt->params = iwl_mvm_default_tt_params;
+
+        tt->throttle = false;
+        tt->dynamic_smps = false;
+        tt->min_backoff = min_backoff;
+        INIT_DELAYED_WORK(&tt->ct_kill_exit, check_exit_ctkill);
+}
+
+void iwl_mvm_tt_exit(struct iwl_mvm *mvm)
+{
+        cancel_delayed_work_sync(&mvm->thermal_throttle.ct_kill_exit);
+        IWL_DEBUG_TEMP(mvm, "Exit Thermal Throttling\n");
+}