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@@ -0,0 +1,509 @@
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+/******************************************************************************
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+ *
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+ * This file is provided under a dual BSD/GPLv2 license. When using or
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+ * redistributing this file, you may do so under either license.
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+ *
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+ * GPL LICENSE SUMMARY
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+ *
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+ * Copyright(c) 2013 Intel Corporation. All rights reserved.
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of version 2 of the GNU General Public License as
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+ * published by the Free Software Foundation.
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+ *
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+ * This program is distributed in the hope that it will be useful, but
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+ * WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ * General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software
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+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
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+ * USA
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+ *
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+ * The full GNU General Public License is included in this distribution
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+ * in the file called COPYING.
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+ *
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+ * 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
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+ *
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+ * BSD LICENSE
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+ *
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+ * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
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+ * All rights reserved.
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+ *
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+ * Redistribution and use in source and binary forms, with or without
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+ * modification, are permitted provided that the following conditions
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+ * are met:
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+ *
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+ * * Redistributions of source code must retain the above copyright
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+ * notice, this list of conditions and the following disclaimer.
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+ * * Redistributions in binary form must reproduce the above copyright
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+ * notice, this list of conditions and the following disclaimer in
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+ * the documentation and/or other materials provided with the
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+ * distribution.
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+ * * Neither the name Intel Corporation nor the names of its
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+ * contributors may be used to endorse or promote products derived
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+ * from this software without specific prior written permission.
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+ *
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+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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+ *
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+ *****************************************************************************/
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+
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+#include "mvm.h"
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+#include "iwl-config.h"
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+#include "iwl-io.h"
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+#include "iwl-csr.h"
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+#include "iwl-prph.h"
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+
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+#define OTP_DTS_DIODE_DEVIATION 96 /*in words*/
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+/* VBG - Voltage Band Gap error data (temperature offset) */
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+#define OTP_WP_DTS_VBG (OTP_DTS_DIODE_DEVIATION + 2)
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+#define MEAS_VBG_MIN_VAL 2300
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+#define MEAS_VBG_MAX_VAL 3000
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+#define MEAS_VBG_DEFAULT_VAL 2700
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+#define DTS_DIODE_VALID(flags) (flags & DTS_DIODE_REG_FLAGS_PASS_ONCE)
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+#define MIN_TEMPERATURE 0
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+#define MAX_TEMPERATURE 125
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+#define TEMPERATURE_ERROR (MAX_TEMPERATURE + 1)
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+#define PTAT_DIGITAL_VALUE_MIN_VALUE 0
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+#define PTAT_DIGITAL_VALUE_MAX_VALUE 0xFF
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+#define DTS_VREFS_NUM 5
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+static inline u32 DTS_DIODE_GET_VREFS_ID(u32 flags)
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+{
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+ return (flags & DTS_DIODE_REG_FLAGS_VREFS_ID) >>
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+ DTS_DIODE_REG_FLAGS_VREFS_ID_POS;
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+}
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+
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+#define CALC_VREFS_MIN_DIFF 43
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+#define CALC_VREFS_MAX_DIFF 51
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+#define CALC_LUT_SIZE (1 + CALC_VREFS_MAX_DIFF - CALC_VREFS_MIN_DIFF)
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+#define CALC_LUT_INDEX_OFFSET CALC_VREFS_MIN_DIFF
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+#define CALC_TEMPERATURE_RESULT_SHIFT_OFFSET 23
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+
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+/*
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+ * @digital_value: The diode's digital-value sampled (temperature/voltage)
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+ * @vref_low: The lower voltage-reference (the vref just below the diode's
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+ * sampled digital-value)
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+ * @vref_high: The higher voltage-reference (the vref just above the diode's
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+ * sampled digital-value)
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+ * @flags: bits[1:0]: The ID of the Vrefs pair (lowVref,highVref)
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+ * bits[6:2]: Reserved.
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+ * bits[7:7]: Indicates completion of at least 1 successful sample
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+ * since last DTS reset.
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+ */
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+struct iwl_mvm_dts_diode_bits {
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+ u8 digital_value;
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+ u8 vref_low;
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+ u8 vref_high;
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+ u8 flags;
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+} __packed;
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+
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+union dts_diode_results {
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+ u32 reg_value;
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+ struct iwl_mvm_dts_diode_bits bits;
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+} __packed;
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+
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+static s16 iwl_mvm_dts_get_volt_band_gap(struct iwl_mvm *mvm)
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+{
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+ struct iwl_nvm_section calib_sec;
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+ const __le16 *calib;
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+ u16 vbg;
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+
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+ /* TODO: move parsing to NVM code */
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+ calib_sec = mvm->nvm_sections[NVM_SECTION_TYPE_CALIBRATION];
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+ calib = (__le16 *)calib_sec.data;
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+
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+ vbg = le16_to_cpu(calib[OTP_WP_DTS_VBG]);
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+
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+ if (vbg < MEAS_VBG_MIN_VAL || vbg > MEAS_VBG_MAX_VAL)
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+ vbg = MEAS_VBG_DEFAULT_VAL;
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+
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+ return vbg;
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+}
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+
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+static u16 iwl_mvm_dts_get_ptat_deviation_offset(struct iwl_mvm *mvm)
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+{
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+ const u8 *calib;
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+ u8 ptat, pa1, pa2, median;
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+
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+ /* TODO: move parsing to NVM code */
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+ calib = mvm->nvm_sections[NVM_SECTION_TYPE_CALIBRATION].data;
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+ ptat = calib[OTP_DTS_DIODE_DEVIATION];
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+ pa1 = calib[OTP_DTS_DIODE_DEVIATION + 1];
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+ pa2 = calib[OTP_DTS_DIODE_DEVIATION + 2];
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+
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+ /* get the median: */
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+ if (ptat > pa1) {
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+ if (ptat > pa2)
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+ median = (pa1 > pa2) ? pa1 : pa2;
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+ else
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+ median = ptat;
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+ } else {
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+ if (pa1 > pa2)
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+ median = (ptat > pa2) ? ptat : pa2;
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+ else
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+ median = pa1;
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+ }
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+
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+ return ptat - median;
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+}
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+
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+static u8 iwl_mvm_dts_calibrate_ptat_deviation(struct iwl_mvm *mvm, u8 value)
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+{
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+ /* Calibrate the PTAT digital value, based on PTAT deviation data: */
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+ s16 new_val = value - iwl_mvm_dts_get_ptat_deviation_offset(mvm);
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+
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+ if (new_val > PTAT_DIGITAL_VALUE_MAX_VALUE)
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+ new_val = PTAT_DIGITAL_VALUE_MAX_VALUE;
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+ else if (new_val < PTAT_DIGITAL_VALUE_MIN_VALUE)
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+ new_val = PTAT_DIGITAL_VALUE_MIN_VALUE;
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+
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+ return new_val;
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+}
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+
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+static bool dts_get_adjacent_vrefs(struct iwl_mvm *mvm,
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+ union dts_diode_results *avg_ptat)
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+{
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+ u8 vrefs_results[DTS_VREFS_NUM];
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+ u8 low_vref_index = 0, flags;
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+ u32 reg;
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+
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+ reg = iwl_read_prph(mvm->trans, DTSC_VREF_AVG);
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+ memcpy(vrefs_results, ®, sizeof(reg));
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+ reg = iwl_read_prph(mvm->trans, DTSC_VREF5_AVG);
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+ vrefs_results[4] = reg & 0xff;
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+
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+ if (avg_ptat->bits.digital_value < vrefs_results[0] ||
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+ avg_ptat->bits.digital_value > vrefs_results[4])
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+ return false;
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+
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+ if (avg_ptat->bits.digital_value > vrefs_results[3])
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+ low_vref_index = 3;
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+ else if (avg_ptat->bits.digital_value > vrefs_results[2])
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+ low_vref_index = 2;
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+ else if (avg_ptat->bits.digital_value > vrefs_results[1])
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+ low_vref_index = 1;
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+
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+ avg_ptat->bits.vref_low = vrefs_results[low_vref_index];
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+ avg_ptat->bits.vref_high = vrefs_results[low_vref_index + 1];
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+ flags = avg_ptat->bits.flags;
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+ avg_ptat->bits.flags =
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+ (flags & ~DTS_DIODE_REG_FLAGS_VREFS_ID) |
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+ (low_vref_index & DTS_DIODE_REG_FLAGS_VREFS_ID);
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+ return true;
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+}
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+
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+/*
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+ * return true it the results are valid, and false otherwise.
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+ */
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+static bool dts_read_ptat_avg_results(struct iwl_mvm *mvm,
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+ union dts_diode_results *avg_ptat)
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+{
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+ u32 reg;
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+ u8 tmp;
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+
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+ /* fill the diode value and pass_once with avg-reg results */
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+ reg = iwl_read_prph(mvm->trans, DTSC_PTAT_AVG);
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+ reg &= DTS_DIODE_REG_DIG_VAL | DTS_DIODE_REG_PASS_ONCE;
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+ avg_ptat->reg_value = reg;
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+
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+ /* calibrate the PTAT digital value */
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+ tmp = avg_ptat->bits.digital_value;
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+ tmp = iwl_mvm_dts_calibrate_ptat_deviation(mvm, tmp);
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+ avg_ptat->bits.digital_value = tmp;
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+
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+ /*
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+ * fill vrefs fields, based on the avgVrefs results
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+ * and the diode value
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+ */
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+ return dts_get_adjacent_vrefs(mvm, avg_ptat) &&
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+ DTS_DIODE_VALID(avg_ptat->bits.flags);
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+}
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+
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+static s32 calculate_nic_temperature(union dts_diode_results avg_ptat,
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+ u16 volt_band_gap)
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+{
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+ u32 tmp_result;
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+ u8 vrefs_diff;
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+ /*
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+ * For temperature calculation (at the end, shift right by 23)
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+ * LUT[(D2-D1)] = ROUND{ 2^23 / ((D2-D1)*9*10) }
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+ * (D2-D1) == 43 44 45 46 47 48 49 50 51
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+ */
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+ static const u16 calc_lut[CALC_LUT_SIZE] = {
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+ 2168, 2118, 2071, 2026, 1983, 1942, 1902, 1864, 1828,
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+ };
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+
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+ /*
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+ * The diff between the high and low voltage-references is assumed
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+ * to be strictly be in range of [60,68]
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+ */
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+ vrefs_diff = avg_ptat.bits.vref_high - avg_ptat.bits.vref_low;
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+
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+ if (vrefs_diff < CALC_VREFS_MIN_DIFF ||
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+ vrefs_diff > CALC_VREFS_MAX_DIFF)
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+ return TEMPERATURE_ERROR;
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+
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+ /* calculate the result: */
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+ tmp_result =
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+ vrefs_diff * (DTS_DIODE_GET_VREFS_ID(avg_ptat.bits.flags) + 9);
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+ tmp_result += avg_ptat.bits.digital_value;
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+ tmp_result -= avg_ptat.bits.vref_high;
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+
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+ /* multiply by the LUT value (based on the diff) */
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+ tmp_result *= calc_lut[vrefs_diff - CALC_LUT_INDEX_OFFSET];
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+
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+ /*
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+ * Get the BandGap (the voltage refereces source) error data
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+ * (temperature offset)
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+ */
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+ tmp_result *= volt_band_gap;
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+
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+ /*
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+ * here, tmp_result value can be up to 32-bits. We want to right-shift
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+ * it *without* sign-extend.
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+ */
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+ tmp_result = tmp_result >> CALC_TEMPERATURE_RESULT_SHIFT_OFFSET;
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+
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+ /*
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+ * at this point, tmp_result should be in the range:
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+ * 200 <= tmp_result <= 365
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+ */
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+ return (s16)tmp_result - 240;
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+}
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+
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+static s32 check_nic_temperature(struct iwl_mvm *mvm)
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+{
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+ u16 volt_band_gap;
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+ union dts_diode_results avg_ptat;
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+
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+ volt_band_gap = iwl_mvm_dts_get_volt_band_gap(mvm);
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+
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+ /* disable DTS */
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+ iwl_write_prph(mvm->trans, SHR_MISC_WFM_DTS_EN, 0);
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+
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+ /* SV initialization */
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+ iwl_write_prph(mvm->trans, SHR_MISC_WFM_DTS_EN, 1);
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+ iwl_write_prph(mvm->trans, DTSC_CFG_MODE,
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+ DTSC_CFG_MODE_PERIODIC);
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+
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+ /* wait for results */
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+ msleep(100);
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+ if (!dts_read_ptat_avg_results(mvm, &avg_ptat))
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+ return TEMPERATURE_ERROR;
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+
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+ /* disable DTS */
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+ iwl_write_prph(mvm->trans, SHR_MISC_WFM_DTS_EN, 0);
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+
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+ return calculate_nic_temperature(avg_ptat, volt_band_gap);
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+}
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+
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+static void iwl_mvm_enter_ctkill(struct iwl_mvm *mvm)
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+{
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+ u32 duration = mvm->thermal_throttle.params->ct_kill_duration;
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+
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+ IWL_ERR(mvm, "Enter CT Kill\n");
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+ iwl_mvm_set_hw_ctkill_state(mvm, true);
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+ schedule_delayed_work(&mvm->thermal_throttle.ct_kill_exit,
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+ round_jiffies_relative(duration * HZ));
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+}
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+
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+static void iwl_mvm_exit_ctkill(struct iwl_mvm *mvm)
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+{
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+ IWL_ERR(mvm, "Exit CT Kill\n");
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+ iwl_mvm_set_hw_ctkill_state(mvm, false);
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+}
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+
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+static void check_exit_ctkill(struct work_struct *work)
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+{
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+ struct iwl_mvm_tt_mgmt *tt;
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+ struct iwl_mvm *mvm;
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+ u32 duration;
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+ s32 temp;
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+
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+ tt = container_of(work, struct iwl_mvm_tt_mgmt, ct_kill_exit.work);
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+ mvm = container_of(tt, struct iwl_mvm, thermal_throttle);
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+
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+ duration = tt->params->ct_kill_duration;
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+
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+ iwl_trans_start_hw(mvm->trans);
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+ temp = check_nic_temperature(mvm);
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+ iwl_trans_stop_hw(mvm->trans, false);
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+
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+ if (temp < MIN_TEMPERATURE || temp > MAX_TEMPERATURE) {
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+ IWL_DEBUG_TEMP(mvm, "Failed to measure NIC temperature\n");
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+ goto reschedule;
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+ }
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+ IWL_DEBUG_TEMP(mvm, "NIC temperature: %d\n", temp);
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+
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+ if (temp <= tt->params->ct_kill_exit) {
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+ iwl_mvm_exit_ctkill(mvm);
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+ return;
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+ }
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+
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+reschedule:
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+ schedule_delayed_work(&mvm->thermal_throttle.ct_kill_exit,
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+ round_jiffies(duration * HZ));
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+}
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+
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+static void iwl_mvm_tt_smps_iterator(void *_data, u8 *mac,
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+ struct ieee80211_vif *vif)
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+{
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+ struct iwl_mvm *mvm = _data;
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+ enum ieee80211_smps_mode smps_mode;
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+
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+ lockdep_assert_held(&mvm->mutex);
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+
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+ if (mvm->thermal_throttle.dynamic_smps)
|
|
|
+ smps_mode = IEEE80211_SMPS_DYNAMIC;
|
|
|
+ else
|
|
|
+ smps_mode = IEEE80211_SMPS_AUTOMATIC;
|
|
|
+
|
|
|
+ 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 = (void *)sta->drv_priv;
|
|
|
+ if (enable == mvmsta->tt_tx_protection)
|
|
|
+ continue;
|
|
|
+ err = iwl_mvm_tx_protection(mvm, &mvmsta->lq_sta.lq,
|
|
|
+ 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;
|
|
|
+ }
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static 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, },
|
|
|
+ .flags = CMD_SYNC,
|
|
|
+ };
|
|
|
+
|
|
|
+ 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)
|
|
|
+{
|
|
|
+ const struct iwl_tt_params *params = mvm->thermal_throttle.params;
|
|
|
+ struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle;
|
|
|
+ s32 temperature = mvm->temperature;
|
|
|
+ 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_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);
|
|
|
+ } 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);
|
|
|
+ else if (temperature <= params->tx_protection_exit)
|
|
|
+ iwl_mvm_tt_tx_protection(mvm, false);
|
|
|
+ }
|
|
|
+
|
|
|
+ if (params->support_tx_backoff) {
|
|
|
+ tx_backoff = 0;
|
|
|
+ for (i = 0; i < TT_TX_BACKOFF_SIZE; i++) {
|
|
|
+ if (temperature < params->tx_backoff[i].temperature)
|
|
|
+ break;
|
|
|
+ tx_backoff = params->tx_backoff[i].backoff;
|
|
|
+ }
|
|
|
+ if (tt->tx_backoff != tx_backoff)
|
|
|
+ iwl_mvm_tt_tx_backoff(mvm, tx_backoff);
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static const struct iwl_tt_params iwl7000_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)
|
|
|
+{
|
|
|
+ struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle;
|
|
|
+
|
|
|
+ IWL_DEBUG_TEMP(mvm, "Initialize Thermal Throttling\n");
|
|
|
+ tt->params = &iwl7000_tt_params;
|
|
|
+ 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");
|
|
|
+}
|
Eytan Lifshitz