Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 492 insertions, 0 deletions

diff --git a/drivers/net/wireless/realtek/rtw89/sar.c b/drivers/net/wireless/realtek/rtw89/sar.c
new file mode 100644
index 0000000000..aed05b026c
--- /dev/null
+++ b/drivers/net/wireless/realtek/rtw89/sar.c
@@ -0,0 +1,492 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+/* Copyright(c) 2019-2020  Realtek Corporation
+ */
+
+#include "acpi.h"
+#include "debug.h"
+#include "phy.h"
+#include "reg.h"
+#include "sar.h"
+
+#define RTW89_TAS_FACTOR 2 /* unit: 0.25 dBm */
+#define RTW89_TAS_DPR_GAP (1 << RTW89_TAS_FACTOR)
+#define RTW89_TAS_DELTA (2 << RTW89_TAS_FACTOR)
+
+static enum rtw89_sar_subband rtw89_sar_get_subband(struct rtw89_dev *rtwdev,
+						    u32 center_freq)
+{
+	switch (center_freq) {
+	default:
+		rtw89_debug(rtwdev, RTW89_DBG_SAR,
+			    "center freq: %u to SAR subband is unhandled\n",
+			    center_freq);
+		fallthrough;
+	case 2412 ... 2484:
+		return RTW89_SAR_2GHZ_SUBBAND;
+	case 5180 ... 5320:
+		return RTW89_SAR_5GHZ_SUBBAND_1_2;
+	case 5500 ... 5720:
+		return RTW89_SAR_5GHZ_SUBBAND_2_E;
+	case 5745 ... 5825:
+		return RTW89_SAR_5GHZ_SUBBAND_3;
+	case 5955 ... 6155:
+		return RTW89_SAR_6GHZ_SUBBAND_5_L;
+	case 6175 ... 6415:
+		return RTW89_SAR_6GHZ_SUBBAND_5_H;
+	case 6435 ... 6515:
+		return RTW89_SAR_6GHZ_SUBBAND_6;
+	case 6535 ... 6695:
+		return RTW89_SAR_6GHZ_SUBBAND_7_L;
+	case 6715 ... 6855:
+		return RTW89_SAR_6GHZ_SUBBAND_7_H;
+
+	/* freq 6875 (ch 185, 20MHz) spans RTW89_SAR_6GHZ_SUBBAND_7_H
+	 * and RTW89_SAR_6GHZ_SUBBAND_8, so directly describe it with
+	 * struct rtw89_sar_span in the following.
+	 */
+
+	case 6895 ... 7115:
+		return RTW89_SAR_6GHZ_SUBBAND_8;
+	}
+}
+
+struct rtw89_sar_span {
+	enum rtw89_sar_subband subband_low;
+	enum rtw89_sar_subband subband_high;
+};
+
+#define RTW89_SAR_SPAN_VALID(span) ((span)->subband_high)
+
+#define RTW89_SAR_6GHZ_SPAN_HEAD 6145
+#define RTW89_SAR_6GHZ_SPAN_IDX(center_freq) \
+	((((int)(center_freq) - RTW89_SAR_6GHZ_SPAN_HEAD) / 5) / 2)
+
+#define RTW89_DECL_SAR_6GHZ_SPAN(center_freq, subband_l, subband_h) \
+	[RTW89_SAR_6GHZ_SPAN_IDX(center_freq)] = { \
+		.subband_low = RTW89_SAR_6GHZ_ ## subband_l, \
+		.subband_high = RTW89_SAR_6GHZ_ ## subband_h, \
+	}
+
+/* Since 6GHz SAR subbands are not edge aligned, some cases span two SAR
+ * subbands. In the following, we describe each of them with rtw89_sar_span.
+ */
+static const struct rtw89_sar_span rtw89_sar_overlapping_6ghz[] = {
+	RTW89_DECL_SAR_6GHZ_SPAN(6145, SUBBAND_5_L, SUBBAND_5_H),
+	RTW89_DECL_SAR_6GHZ_SPAN(6165, SUBBAND_5_L, SUBBAND_5_H),
+	RTW89_DECL_SAR_6GHZ_SPAN(6185, SUBBAND_5_L, SUBBAND_5_H),
+	RTW89_DECL_SAR_6GHZ_SPAN(6505, SUBBAND_6, SUBBAND_7_L),
+	RTW89_DECL_SAR_6GHZ_SPAN(6525, SUBBAND_6, SUBBAND_7_L),
+	RTW89_DECL_SAR_6GHZ_SPAN(6545, SUBBAND_6, SUBBAND_7_L),
+	RTW89_DECL_SAR_6GHZ_SPAN(6665, SUBBAND_7_L, SUBBAND_7_H),
+	RTW89_DECL_SAR_6GHZ_SPAN(6705, SUBBAND_7_L, SUBBAND_7_H),
+	RTW89_DECL_SAR_6GHZ_SPAN(6825, SUBBAND_7_H, SUBBAND_8),
+	RTW89_DECL_SAR_6GHZ_SPAN(6865, SUBBAND_7_H, SUBBAND_8),
+	RTW89_DECL_SAR_6GHZ_SPAN(6875, SUBBAND_7_H, SUBBAND_8),
+	RTW89_DECL_SAR_6GHZ_SPAN(6885, SUBBAND_7_H, SUBBAND_8),
+};
+
+static int rtw89_query_sar_config_common(struct rtw89_dev *rtwdev,
+					 u32 center_freq, s32 *cfg)
+{
+	struct rtw89_sar_cfg_common *rtwsar = &rtwdev->sar.cfg_common;
+	const struct rtw89_sar_span *span = NULL;
+	enum rtw89_sar_subband subband_l, subband_h;
+	int idx;
+
+	if (center_freq >= RTW89_SAR_6GHZ_SPAN_HEAD) {
+		idx = RTW89_SAR_6GHZ_SPAN_IDX(center_freq);
+		/* To decrease size of rtw89_sar_overlapping_6ghz[],
+		 * RTW89_SAR_6GHZ_SPAN_IDX() truncates the leading NULLs
+		 * to make first span as index 0 of the table. So, if center
+		 * frequency is less than the first one, it will get netative.
+		 */
+		if (idx >= 0 && idx < ARRAY_SIZE(rtw89_sar_overlapping_6ghz))
+			span = &rtw89_sar_overlapping_6ghz[idx];
+	}
+
+	if (span && RTW89_SAR_SPAN_VALID(span)) {
+		subband_l = span->subband_low;
+		subband_h = span->subband_high;
+	} else {
+		subband_l = rtw89_sar_get_subband(rtwdev, center_freq);
+		subband_h = subband_l;
+	}
+
+	rtw89_debug(rtwdev, RTW89_DBG_SAR,
+		    "center_freq %u: SAR subband {%u, %u}\n",
+		    center_freq, subband_l, subband_h);
+
+	if (!rtwsar->set[subband_l] && !rtwsar->set[subband_h])
+		return -ENODATA;
+
+	if (!rtwsar->set[subband_l])
+		*cfg = rtwsar->cfg[subband_h];
+	else if (!rtwsar->set[subband_h])
+		*cfg = rtwsar->cfg[subband_l];
+	else
+		*cfg = min(rtwsar->cfg[subband_l], rtwsar->cfg[subband_h]);
+
+	return 0;
+}
+
+static const
+struct rtw89_sar_handler rtw89_sar_handlers[RTW89_SAR_SOURCE_NR] = {
+	[RTW89_SAR_SOURCE_COMMON] = {
+		.descr_sar_source = "RTW89_SAR_SOURCE_COMMON",
+		.txpwr_factor_sar = 2,
+		.query_sar_config = rtw89_query_sar_config_common,
+	},
+};
+
+#define rtw89_sar_set_src(_dev, _src, _cfg_name, _cfg_data)		\
+	do {								\
+		typeof(_src) _s = (_src);				\
+		typeof(_dev) _d = (_dev);				\
+		BUILD_BUG_ON(!rtw89_sar_handlers[_s].descr_sar_source);	\
+		BUILD_BUG_ON(!rtw89_sar_handlers[_s].query_sar_config);	\
+		lockdep_assert_held(&_d->mutex);			\
+		_d->sar._cfg_name = *(_cfg_data);			\
+		_d->sar.src = _s;					\
+	} while (0)
+
+static s8 rtw89_txpwr_sar_to_mac(struct rtw89_dev *rtwdev, u8 fct, s32 cfg)
+{
+	const u8 fct_mac = rtwdev->chip->txpwr_factor_mac;
+	s32 cfg_mac;
+
+	cfg_mac = fct > fct_mac ?
+		  cfg >> (fct - fct_mac) : cfg << (fct_mac - fct);
+
+	return (s8)clamp_t(s32, cfg_mac,
+			   RTW89_SAR_TXPWR_MAC_MIN,
+			   RTW89_SAR_TXPWR_MAC_MAX);
+}
+
+static s8 rtw89_txpwr_tas_to_sar(const struct rtw89_sar_handler *sar_hdl,
+				 s8 cfg)
+{
+	const u8 fct = sar_hdl->txpwr_factor_sar;
+
+	if (fct > RTW89_TAS_FACTOR)
+		return cfg << (fct - RTW89_TAS_FACTOR);
+	else
+		return cfg >> (RTW89_TAS_FACTOR - fct);
+}
+
+static s8 rtw89_txpwr_sar_to_tas(const struct rtw89_sar_handler *sar_hdl,
+				 s8 cfg)
+{
+	const u8 fct = sar_hdl->txpwr_factor_sar;
+
+	if (fct > RTW89_TAS_FACTOR)
+		return cfg >> (fct - RTW89_TAS_FACTOR);
+	else
+		return cfg << (RTW89_TAS_FACTOR - fct);
+}
+
+s8 rtw89_query_sar(struct rtw89_dev *rtwdev, u32 center_freq)
+{
+	const enum rtw89_sar_sources src = rtwdev->sar.src;
+	/* its members are protected by rtw89_sar_set_src() */
+	const struct rtw89_sar_handler *sar_hdl = &rtw89_sar_handlers[src];
+	struct rtw89_tas_info *tas = &rtwdev->tas;
+	s8 delta;
+	int ret;
+	s32 cfg;
+	u8 fct;
+
+	lockdep_assert_held(&rtwdev->mutex);
+
+	if (src == RTW89_SAR_SOURCE_NONE)
+		return RTW89_SAR_TXPWR_MAC_MAX;
+
+	ret = sar_hdl->query_sar_config(rtwdev, center_freq, &cfg);
+	if (ret)
+		return RTW89_SAR_TXPWR_MAC_MAX;
+
+	if (tas->enable) {
+		switch (tas->state) {
+		case RTW89_TAS_STATE_DPR_OFF:
+			return RTW89_SAR_TXPWR_MAC_MAX;
+		case RTW89_TAS_STATE_DPR_ON:
+			delta = rtw89_txpwr_tas_to_sar(sar_hdl, tas->delta);
+			cfg -= delta;
+			break;
+		case RTW89_TAS_STATE_DPR_FORBID:
+		default:
+			break;
+		}
+	}
+
+	fct = sar_hdl->txpwr_factor_sar;
+
+	return rtw89_txpwr_sar_to_mac(rtwdev, fct, cfg);
+}
+
+void rtw89_print_sar(struct seq_file *m, struct rtw89_dev *rtwdev, u32 center_freq)
+{
+	const enum rtw89_sar_sources src = rtwdev->sar.src;
+	/* its members are protected by rtw89_sar_set_src() */
+	const struct rtw89_sar_handler *sar_hdl = &rtw89_sar_handlers[src];
+	const u8 fct_mac = rtwdev->chip->txpwr_factor_mac;
+	int ret;
+	s32 cfg;
+	u8 fct;
+
+	lockdep_assert_held(&rtwdev->mutex);
+
+	if (src == RTW89_SAR_SOURCE_NONE) {
+		seq_puts(m, "no SAR is applied\n");
+		return;
+	}
+
+	seq_printf(m, "source: %d (%s)\n", src, sar_hdl->descr_sar_source);
+
+	ret = sar_hdl->query_sar_config(rtwdev, center_freq, &cfg);
+	if (ret) {
+		seq_printf(m, "config: return code: %d\n", ret);
+		seq_printf(m, "assign: max setting: %d (unit: 1/%lu dBm)\n",
+			   RTW89_SAR_TXPWR_MAC_MAX, BIT(fct_mac));
+		return;
+	}
+
+	fct = sar_hdl->txpwr_factor_sar;
+
+	seq_printf(m, "config: %d (unit: 1/%lu dBm)\n", cfg, BIT(fct));
+}
+
+void rtw89_print_tas(struct seq_file *m, struct rtw89_dev *rtwdev)
+{
+	struct rtw89_tas_info *tas = &rtwdev->tas;
+
+	if (!tas->enable) {
+		seq_puts(m, "no TAS is applied\n");
+		return;
+	}
+
+	seq_printf(m, "DPR gap: %d\n", tas->dpr_gap);
+	seq_printf(m, "TAS delta: %d\n", tas->delta);
+}
+
+static int rtw89_apply_sar_common(struct rtw89_dev *rtwdev,
+				  const struct rtw89_sar_cfg_common *sar)
+{
+	enum rtw89_sar_sources src;
+	int ret = 0;
+
+	mutex_lock(&rtwdev->mutex);
+
+	src = rtwdev->sar.src;
+	if (src != RTW89_SAR_SOURCE_NONE && src != RTW89_SAR_SOURCE_COMMON) {
+		rtw89_warn(rtwdev, "SAR source: %d is in use", src);
+		ret = -EBUSY;
+		goto exit;
+	}
+
+	rtw89_sar_set_src(rtwdev, RTW89_SAR_SOURCE_COMMON, cfg_common, sar);
+	rtw89_core_set_chip_txpwr(rtwdev);
+
+exit:
+	mutex_unlock(&rtwdev->mutex);
+	return ret;
+}
+
+static const struct cfg80211_sar_freq_ranges rtw89_common_sar_freq_ranges[] = {
+	{ .start_freq = 2412, .end_freq = 2484, },
+	{ .start_freq = 5180, .end_freq = 5320, },
+	{ .start_freq = 5500, .end_freq = 5720, },
+	{ .start_freq = 5745, .end_freq = 5825, },
+	{ .start_freq = 5955, .end_freq = 6155, },
+	{ .start_freq = 6175, .end_freq = 6415, },
+	{ .start_freq = 6435, .end_freq = 6515, },
+	{ .start_freq = 6535, .end_freq = 6695, },
+	{ .start_freq = 6715, .end_freq = 6875, },
+	{ .start_freq = 6875, .end_freq = 7115, },
+};
+
+static_assert(RTW89_SAR_SUBBAND_NR ==
+	      ARRAY_SIZE(rtw89_common_sar_freq_ranges));
+
+const struct cfg80211_sar_capa rtw89_sar_capa = {
+	.type = NL80211_SAR_TYPE_POWER,
+	.num_freq_ranges = ARRAY_SIZE(rtw89_common_sar_freq_ranges),
+	.freq_ranges = rtw89_common_sar_freq_ranges,
+};
+
+int rtw89_ops_set_sar_specs(struct ieee80211_hw *hw,
+			    const struct cfg80211_sar_specs *sar)
+{
+	struct rtw89_dev *rtwdev = hw->priv;
+	struct rtw89_sar_cfg_common sar_common = {0};
+	u8 fct;
+	u32 freq_start;
+	u32 freq_end;
+	s32 power;
+	u32 i, idx;
+
+	if (sar->type != NL80211_SAR_TYPE_POWER)
+		return -EINVAL;
+
+	fct = rtw89_sar_handlers[RTW89_SAR_SOURCE_COMMON].txpwr_factor_sar;
+
+	for (i = 0; i < sar->num_sub_specs; i++) {
+		idx = sar->sub_specs[i].freq_range_index;
+		if (idx >= ARRAY_SIZE(rtw89_common_sar_freq_ranges))
+			return -EINVAL;
+
+		freq_start = rtw89_common_sar_freq_ranges[idx].start_freq;
+		freq_end = rtw89_common_sar_freq_ranges[idx].end_freq;
+		power = sar->sub_specs[i].power;
+
+		rtw89_debug(rtwdev, RTW89_DBG_SAR,
+			    "On freq %u to %u, set SAR limit %d (unit: 1/%lu dBm)\n",
+			    freq_start, freq_end, power, BIT(fct));
+
+		sar_common.set[idx] = true;
+		sar_common.cfg[idx] = power;
+	}
+
+	return rtw89_apply_sar_common(rtwdev, &sar_common);
+}
+
+static void rtw89_tas_state_update(struct rtw89_dev *rtwdev)
+{
+	const enum rtw89_sar_sources src = rtwdev->sar.src;
+	/* its members are protected by rtw89_sar_set_src() */
+	const struct rtw89_sar_handler *sar_hdl = &rtw89_sar_handlers[src];
+	struct rtw89_tas_info *tas = &rtwdev->tas;
+	s32 txpwr_avg = tas->total_txpwr / RTW89_TAS_MAX_WINDOW / PERCENT;
+	s32 dpr_on_threshold, dpr_off_threshold, cfg;
+	enum rtw89_tas_state state = tas->state;
+	const struct rtw89_chan *chan;
+	int ret;
+
+	lockdep_assert_held(&rtwdev->mutex);
+
+	if (src == RTW89_SAR_SOURCE_NONE)
+		return;
+
+	chan = rtw89_chan_get(rtwdev, RTW89_SUB_ENTITY_0);
+	ret = sar_hdl->query_sar_config(rtwdev, chan->freq, &cfg);
+	if (ret)
+		return;
+
+	cfg = rtw89_txpwr_sar_to_tas(sar_hdl, cfg);
+
+	if (tas->delta >= cfg) {
+		rtw89_debug(rtwdev, RTW89_DBG_SAR,
+			    "TAS delta exceed SAR limit\n");
+		state = RTW89_TAS_STATE_DPR_FORBID;
+		goto out;
+	}
+
+	dpr_on_threshold = cfg;
+	dpr_off_threshold = cfg - tas->dpr_gap;
+	rtw89_debug(rtwdev, RTW89_DBG_SAR,
+		    "DPR_ON thold: %d, DPR_OFF thold: %d, txpwr_avg: %d\n",
+		    dpr_on_threshold, dpr_off_threshold, txpwr_avg);
+
+	if (txpwr_avg >= dpr_on_threshold)
+		state = RTW89_TAS_STATE_DPR_ON;
+	else if (txpwr_avg < dpr_off_threshold)
+		state = RTW89_TAS_STATE_DPR_OFF;
+
+out:
+	if (tas->state == state)
+		return;
+
+	rtw89_debug(rtwdev, RTW89_DBG_SAR,
+		    "TAS old state: %d, new state: %d\n", tas->state, state);
+	tas->state = state;
+	rtw89_core_set_chip_txpwr(rtwdev);
+}
+
+void rtw89_tas_init(struct rtw89_dev *rtwdev)
+{
+	struct rtw89_tas_info *tas = &rtwdev->tas;
+	int ret;
+	u8 val;
+
+	ret = rtw89_acpi_evaluate_dsm(rtwdev, RTW89_ACPI_DSM_FUNC_TAS_EN, &val);
+	if (ret) {
+		rtw89_debug(rtwdev, RTW89_DBG_SAR,
+			    "acpi: cannot get TAS: %d\n", ret);
+		return;
+	}
+
+	switch (val) {
+	case 0:
+		tas->enable = false;
+		break;
+	case 1:
+		tas->enable = true;
+		break;
+	default:
+		break;
+	}
+
+	if (!tas->enable) {
+		rtw89_debug(rtwdev, RTW89_DBG_SAR, "TAS not enable\n");
+		return;
+	}
+
+	tas->dpr_gap = RTW89_TAS_DPR_GAP;
+	tas->delta = RTW89_TAS_DELTA;
+}
+
+void rtw89_tas_reset(struct rtw89_dev *rtwdev)
+{
+	struct rtw89_tas_info *tas = &rtwdev->tas;
+
+	if (!tas->enable)
+		return;
+
+	memset(&tas->txpwr_history, 0, sizeof(tas->txpwr_history));
+	tas->total_txpwr = 0;
+	tas->cur_idx = 0;
+	tas->state = RTW89_TAS_STATE_DPR_OFF;
+}
+
+static const struct rtw89_reg_def txpwr_regs[] = {
+	{R_PATH0_TXPWR, B_PATH0_TXPWR},
+	{R_PATH1_TXPWR, B_PATH1_TXPWR},
+};
+
+void rtw89_tas_track(struct rtw89_dev *rtwdev)
+{
+	struct rtw89_env_monitor_info *env = &rtwdev->env_monitor;
+	const enum rtw89_sar_sources src = rtwdev->sar.src;
+	u8 max_nss_num = rtwdev->chip->rf_path_num;
+	struct rtw89_tas_info *tas = &rtwdev->tas;
+	s16 tmp, txpwr, instant_txpwr = 0;
+	u32 val;
+	int i;
+
+	if (!tas->enable || src == RTW89_SAR_SOURCE_NONE)
+		return;
+
+	if (env->ccx_watchdog_result != RTW89_PHY_ENV_MON_IFS_CLM)
+		return;
+
+	for (i = 0; i < max_nss_num; i++) {
+		val = rtw89_phy_read32_mask(rtwdev, txpwr_regs[i].addr,
+					    txpwr_regs[i].mask);
+		tmp = sign_extend32(val, 8);
+		if (tmp <= 0)
+			return;
+		instant_txpwr += tmp;
+	}
+
+	instant_txpwr /= max_nss_num;
+	/* in unit of 0.25 dBm multiply by percentage */
+	txpwr = instant_txpwr * env->ifs_clm_tx_ratio;
+	tas->total_txpwr += txpwr - tas->txpwr_history[tas->cur_idx];
+	tas->txpwr_history[tas->cur_idx] = txpwr;
+	rtw89_debug(rtwdev, RTW89_DBG_SAR,
+		    "instant_txpwr: %d, tx_ratio: %d, txpwr: %d\n",
+		    instant_txpwr, env->ifs_clm_tx_ratio, txpwr);
+
+	tas->cur_idx = (tas->cur_idx + 1) % RTW89_TAS_MAX_WINDOW;
+
+	rtw89_tas_state_update(rtwdev);
+}