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691 lines
20 KiB
Diff
691 lines
20 KiB
Diff
From: =?UTF-8?q?Toke=20H=C3=B8iland-J=C3=B8rgensen?= <toke@redhat.com>
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Date: Mon, 18 Nov 2019 22:06:08 -0800
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Subject: [PATCH] mac80211: Import airtime calculation code from mt76
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Felix recently added code to calculate airtime of packets to the mt76
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driver. Import this into mac80211 so we can use it for airtime queue limit
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calculations.
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The airtime.c file is copied verbatim from the mt76 driver, and adjusted to
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be usable in mac80211. This involves:
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- Switching to mac80211 data structures.
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- Adding support for 160 MHz channels and HE mode.
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- Moving the symbol and duration calculations around a bit to avoid
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rounding with the higher rates and longer symbol times used for HE rates.
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The per-rate TX rate calculation is also split out to its own function so
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it can be used directly for the AQL calculations later.
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Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
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Link: https://lore.kernel.org/r/20191119060610.76681-3-kyan@google.com
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[fix HE_GROUP_IDX() to use 3 * bw, since there are 3 _gi values]
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Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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---
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create mode 100644 net/mac80211/airtime.c
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--- a/include/net/mac80211.h
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+++ b/include/net/mac80211.h
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@@ -6417,4 +6417,33 @@ void ieee80211_nan_func_match(struct iee
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struct cfg80211_nan_match_params *match,
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gfp_t gfp);
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+/**
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+ * ieee80211_calc_rx_airtime - calculate estimated transmission airtime for RX.
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+ *
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+ * This function calculates the estimated airtime usage of a frame based on the
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+ * rate information in the RX status struct and the frame length.
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+ *
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+ * @hw: pointer as obtained from ieee80211_alloc_hw()
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+ * @status: &struct ieee80211_rx_status containing the transmission rate
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+ * information.
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+ * @len: frame length in bytes
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+ */
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+u32 ieee80211_calc_rx_airtime(struct ieee80211_hw *hw,
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+ struct ieee80211_rx_status *status,
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+ int len);
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+
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+/**
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+ * ieee80211_calc_tx_airtime - calculate estimated transmission airtime for TX.
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+ *
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+ * This function calculates the estimated airtime usage of a frame based on the
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+ * rate information in the TX info struct and the frame length.
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+ *
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+ * @hw: pointer as obtained from ieee80211_alloc_hw()
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+ * @info: &struct ieee80211_tx_info of the frame.
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+ * @len: frame length in bytes
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+ */
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+u32 ieee80211_calc_tx_airtime(struct ieee80211_hw *hw,
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+ struct ieee80211_tx_info *info,
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+ int len);
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+
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#endif /* MAC80211_H */
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--- a/net/mac80211/Makefile
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+++ b/net/mac80211/Makefile
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@@ -31,7 +31,8 @@ mac80211-y := \
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chan.o \
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trace.o mlme.o \
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tdls.o \
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- ocb.o
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+ ocb.o \
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+ airtime.o
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mac80211-$(CPTCFG_MAC80211_LEDS) += led.o
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mac80211-$(CPTCFG_MAC80211_DEBUGFS) += \
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--- /dev/null
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+++ b/net/mac80211/airtime.c
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@@ -0,0 +1,597 @@
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+// SPDX-License-Identifier: ISC
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+/*
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+ * Copyright (C) 2019 Felix Fietkau <nbd@nbd.name>
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+ */
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+
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+#include <net/mac80211.h>
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+#include "ieee80211_i.h"
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+#include "sta_info.h"
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+
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+#define AVG_PKT_SIZE 1024
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+
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+/* Number of bits for an average sized packet */
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+#define MCS_NBITS (AVG_PKT_SIZE << 3)
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+
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+/* Number of kilo-symbols (symbols * 1024) for a packet with (bps) bits per
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+ * symbol. We use k-symbols to avoid rounding in the _TIME macros below.
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+ */
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+#define MCS_N_KSYMS(bps) DIV_ROUND_UP(MCS_NBITS << 10, (bps))
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+
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+/* Transmission time (in 1024 * usec) for a packet containing (ksyms) * 1024
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+ * symbols.
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+ */
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+#define MCS_SYMBOL_TIME(sgi, ksyms) \
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+ (sgi ? \
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+ ((ksyms) * 4 * 18) / 20 : /* 3.6 us per sym */ \
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+ ((ksyms) * 4) /* 4.0 us per sym */ \
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+ )
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+
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+/* Transmit duration for the raw data part of an average sized packet */
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+#define MCS_DURATION(streams, sgi, bps) \
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+ ((u32)MCS_SYMBOL_TIME(sgi, MCS_N_KSYMS((streams) * (bps))))
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+
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+#define MCS_DURATION_S(shift, streams, sgi, bps) \
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+ ((u16)((MCS_DURATION(streams, sgi, bps) >> shift)))
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+
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+/* These should match the values in enum nl80211_he_gi */
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+#define HE_GI_08 0
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+#define HE_GI_16 1
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+#define HE_GI_32 2
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+
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+/* Transmission time (1024 usec) for a packet containing (ksyms) * k-symbols */
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+#define HE_SYMBOL_TIME(gi, ksyms) \
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+ (gi == HE_GI_08 ? \
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+ ((ksyms) * 16 * 17) / 20 : /* 13.6 us per sym */ \
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+ (gi == HE_GI_16 ? \
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+ ((ksyms) * 16 * 18) / 20 : /* 14.4 us per sym */ \
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+ ((ksyms) * 16) /* 16.0 us per sym */ \
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+ ))
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+
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+/* Transmit duration for the raw data part of an average sized packet */
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+#define HE_DURATION(streams, gi, bps) \
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+ ((u32)HE_SYMBOL_TIME(gi, MCS_N_KSYMS((streams) * (bps))))
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+
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+#define HE_DURATION_S(shift, streams, gi, bps) \
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+ (HE_DURATION(streams, gi, bps) >> shift)
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+
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+#define BW_20 0
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+#define BW_40 1
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+#define BW_80 2
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+#define BW_160 3
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+
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+/*
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+ * Define group sort order: HT40 -> SGI -> #streams
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+ */
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+#define IEEE80211_MAX_STREAMS 4
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+#define IEEE80211_HT_STREAM_GROUPS 4 /* BW(=2) * SGI(=2) */
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+#define IEEE80211_VHT_STREAM_GROUPS 8 /* BW(=4) * SGI(=2) */
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+
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+#define IEEE80211_HE_MAX_STREAMS 8
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+#define IEEE80211_HE_STREAM_GROUPS 12 /* BW(=4) * GI(=3) */
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+
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+#define IEEE80211_HT_GROUPS_NB (IEEE80211_MAX_STREAMS * \
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+ IEEE80211_HT_STREAM_GROUPS)
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+#define IEEE80211_VHT_GROUPS_NB (IEEE80211_MAX_STREAMS * \
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+ IEEE80211_VHT_STREAM_GROUPS)
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+#define IEEE80211_HE_GROUPS_NB (IEEE80211_HE_MAX_STREAMS * \
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+ IEEE80211_HE_STREAM_GROUPS)
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+#define IEEE80211_GROUPS_NB (IEEE80211_HT_GROUPS_NB + \
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+ IEEE80211_VHT_GROUPS_NB + \
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+ IEEE80211_HE_GROUPS_NB)
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+
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+#define IEEE80211_HT_GROUP_0 0
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+#define IEEE80211_VHT_GROUP_0 (IEEE80211_HT_GROUP_0 + IEEE80211_HT_GROUPS_NB)
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+#define IEEE80211_HE_GROUP_0 (IEEE80211_VHT_GROUP_0 + IEEE80211_VHT_GROUPS_NB)
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+
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+#define MCS_GROUP_RATES 12
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+
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+#define HT_GROUP_IDX(_streams, _sgi, _ht40) \
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+ IEEE80211_HT_GROUP_0 + \
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+ IEEE80211_MAX_STREAMS * 2 * _ht40 + \
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+ IEEE80211_MAX_STREAMS * _sgi + \
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+ _streams - 1
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+
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+#define _MAX(a, b) (((a)>(b))?(a):(b))
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+
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+#define GROUP_SHIFT(duration) \
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+ _MAX(0, 16 - __builtin_clz(duration))
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+
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+/* MCS rate information for an MCS group */
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+#define __MCS_GROUP(_streams, _sgi, _ht40, _s) \
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+ [HT_GROUP_IDX(_streams, _sgi, _ht40)] = { \
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+ .shift = _s, \
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+ .duration = { \
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+ MCS_DURATION_S(_s, _streams, _sgi, _ht40 ? 54 : 26), \
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+ MCS_DURATION_S(_s, _streams, _sgi, _ht40 ? 108 : 52), \
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+ MCS_DURATION_S(_s, _streams, _sgi, _ht40 ? 162 : 78), \
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+ MCS_DURATION_S(_s, _streams, _sgi, _ht40 ? 216 : 104), \
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+ MCS_DURATION_S(_s, _streams, _sgi, _ht40 ? 324 : 156), \
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+ MCS_DURATION_S(_s, _streams, _sgi, _ht40 ? 432 : 208), \
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+ MCS_DURATION_S(_s, _streams, _sgi, _ht40 ? 486 : 234), \
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+ MCS_DURATION_S(_s, _streams, _sgi, _ht40 ? 540 : 260) \
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+ } \
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+}
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+
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+#define MCS_GROUP_SHIFT(_streams, _sgi, _ht40) \
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+ GROUP_SHIFT(MCS_DURATION(_streams, _sgi, _ht40 ? 54 : 26))
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+
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+#define MCS_GROUP(_streams, _sgi, _ht40) \
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+ __MCS_GROUP(_streams, _sgi, _ht40, \
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+ MCS_GROUP_SHIFT(_streams, _sgi, _ht40))
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+
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+#define VHT_GROUP_IDX(_streams, _sgi, _bw) \
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+ (IEEE80211_VHT_GROUP_0 + \
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+ IEEE80211_MAX_STREAMS * 2 * (_bw) + \
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+ IEEE80211_MAX_STREAMS * (_sgi) + \
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+ (_streams) - 1)
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+
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+#define BW2VBPS(_bw, r4, r3, r2, r1) \
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+ (_bw == BW_160 ? r4 : _bw == BW_80 ? r3 : _bw == BW_40 ? r2 : r1)
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+
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+#define __VHT_GROUP(_streams, _sgi, _bw, _s) \
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+ [VHT_GROUP_IDX(_streams, _sgi, _bw)] = { \
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+ .shift = _s, \
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+ .duration = { \
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+ MCS_DURATION_S(_s, _streams, _sgi, \
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+ BW2VBPS(_bw, 234, 117, 54, 26)), \
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+ MCS_DURATION_S(_s, _streams, _sgi, \
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+ BW2VBPS(_bw, 468, 234, 108, 52)), \
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+ MCS_DURATION_S(_s, _streams, _sgi, \
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+ BW2VBPS(_bw, 702, 351, 162, 78)), \
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+ MCS_DURATION_S(_s, _streams, _sgi, \
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+ BW2VBPS(_bw, 936, 468, 216, 104)), \
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+ MCS_DURATION_S(_s, _streams, _sgi, \
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+ BW2VBPS(_bw, 1404, 702, 324, 156)), \
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+ MCS_DURATION_S(_s, _streams, _sgi, \
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+ BW2VBPS(_bw, 1872, 936, 432, 208)), \
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+ MCS_DURATION_S(_s, _streams, _sgi, \
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+ BW2VBPS(_bw, 2106, 1053, 486, 234)), \
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+ MCS_DURATION_S(_s, _streams, _sgi, \
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+ BW2VBPS(_bw, 2340, 1170, 540, 260)), \
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+ MCS_DURATION_S(_s, _streams, _sgi, \
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+ BW2VBPS(_bw, 2808, 1404, 648, 312)), \
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+ MCS_DURATION_S(_s, _streams, _sgi, \
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+ BW2VBPS(_bw, 3120, 1560, 720, 346)) \
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+ } \
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+}
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+
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+#define VHT_GROUP_SHIFT(_streams, _sgi, _bw) \
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+ GROUP_SHIFT(MCS_DURATION(_streams, _sgi, \
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+ BW2VBPS(_bw, 243, 117, 54, 26)))
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+
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+#define VHT_GROUP(_streams, _sgi, _bw) \
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+ __VHT_GROUP(_streams, _sgi, _bw, \
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+ VHT_GROUP_SHIFT(_streams, _sgi, _bw))
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+
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+
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+#define HE_GROUP_IDX(_streams, _gi, _bw) \
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+ (IEEE80211_HE_GROUP_0 + \
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+ IEEE80211_HE_MAX_STREAMS * 3 * (_bw) + \
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+ IEEE80211_HE_MAX_STREAMS * (_gi) + \
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+ (_streams) - 1)
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+
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+#define __HE_GROUP(_streams, _gi, _bw, _s) \
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+ [HE_GROUP_IDX(_streams, _gi, _bw)] = { \
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+ .shift = _s, \
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+ .duration = { \
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+ HE_DURATION_S(_s, _streams, _gi, \
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+ BW2VBPS(_bw, 979, 489, 230, 115)), \
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+ HE_DURATION_S(_s, _streams, _gi, \
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+ BW2VBPS(_bw, 1958, 979, 475, 230)), \
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+ HE_DURATION_S(_s, _streams, _gi, \
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+ BW2VBPS(_bw, 2937, 1468, 705, 345)), \
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+ HE_DURATION_S(_s, _streams, _gi, \
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+ BW2VBPS(_bw, 3916, 1958, 936, 475)), \
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+ HE_DURATION_S(_s, _streams, _gi, \
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+ BW2VBPS(_bw, 5875, 2937, 1411, 705)), \
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+ HE_DURATION_S(_s, _streams, _gi, \
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+ BW2VBPS(_bw, 7833, 3916, 1872, 936)), \
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+ HE_DURATION_S(_s, _streams, _gi, \
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+ BW2VBPS(_bw, 8827, 4406, 2102, 1051)), \
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+ HE_DURATION_S(_s, _streams, _gi, \
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+ BW2VBPS(_bw, 9806, 4896, 2347, 1166)), \
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+ HE_DURATION_S(_s, _streams, _gi, \
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+ BW2VBPS(_bw, 11764, 5875, 2808, 1411)), \
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+ HE_DURATION_S(_s, _streams, _gi, \
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+ BW2VBPS(_bw, 13060, 6523, 3124, 1555)), \
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+ HE_DURATION_S(_s, _streams, _gi, \
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+ BW2VBPS(_bw, 14702, 7344, 3513, 1756)), \
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+ HE_DURATION_S(_s, _streams, _gi, \
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+ BW2VBPS(_bw, 16329, 8164, 3902, 1944)) \
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+ } \
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+}
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+
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+#define HE_GROUP_SHIFT(_streams, _gi, _bw) \
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+ GROUP_SHIFT(HE_DURATION(_streams, _gi, \
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+ BW2VBPS(_bw, 979, 489, 230, 115)))
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+
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+#define HE_GROUP(_streams, _gi, _bw) \
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+ __HE_GROUP(_streams, _gi, _bw, \
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+ HE_GROUP_SHIFT(_streams, _gi, _bw))
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+struct mcs_group {
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+ u8 shift;
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+ u16 duration[MCS_GROUP_RATES];
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+};
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+
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+static const struct mcs_group airtime_mcs_groups[] = {
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+ MCS_GROUP(1, 0, BW_20),
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+ MCS_GROUP(2, 0, BW_20),
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+ MCS_GROUP(3, 0, BW_20),
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+ MCS_GROUP(4, 0, BW_20),
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+
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+ MCS_GROUP(1, 1, BW_20),
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+ MCS_GROUP(2, 1, BW_20),
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+ MCS_GROUP(3, 1, BW_20),
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+ MCS_GROUP(4, 1, BW_20),
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+
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+ MCS_GROUP(1, 0, BW_40),
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+ MCS_GROUP(2, 0, BW_40),
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+ MCS_GROUP(3, 0, BW_40),
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+ MCS_GROUP(4, 0, BW_40),
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+
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+ MCS_GROUP(1, 1, BW_40),
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+ MCS_GROUP(2, 1, BW_40),
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+ MCS_GROUP(3, 1, BW_40),
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+ MCS_GROUP(4, 1, BW_40),
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+
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+ VHT_GROUP(1, 0, BW_20),
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+ VHT_GROUP(2, 0, BW_20),
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+ VHT_GROUP(3, 0, BW_20),
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+ VHT_GROUP(4, 0, BW_20),
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+
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+ VHT_GROUP(1, 1, BW_20),
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+ VHT_GROUP(2, 1, BW_20),
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+ VHT_GROUP(3, 1, BW_20),
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+ VHT_GROUP(4, 1, BW_20),
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+
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+ VHT_GROUP(1, 0, BW_40),
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+ VHT_GROUP(2, 0, BW_40),
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+ VHT_GROUP(3, 0, BW_40),
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+ VHT_GROUP(4, 0, BW_40),
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+
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+ VHT_GROUP(1, 1, BW_40),
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+ VHT_GROUP(2, 1, BW_40),
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+ VHT_GROUP(3, 1, BW_40),
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+ VHT_GROUP(4, 1, BW_40),
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+
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+ VHT_GROUP(1, 0, BW_80),
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+ VHT_GROUP(2, 0, BW_80),
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+ VHT_GROUP(3, 0, BW_80),
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+ VHT_GROUP(4, 0, BW_80),
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+
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+ VHT_GROUP(1, 1, BW_80),
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+ VHT_GROUP(2, 1, BW_80),
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+ VHT_GROUP(3, 1, BW_80),
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+ VHT_GROUP(4, 1, BW_80),
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+
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+ VHT_GROUP(1, 0, BW_160),
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+ VHT_GROUP(2, 0, BW_160),
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+ VHT_GROUP(3, 0, BW_160),
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+ VHT_GROUP(4, 0, BW_160),
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+
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+ VHT_GROUP(1, 1, BW_160),
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+ VHT_GROUP(2, 1, BW_160),
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+ VHT_GROUP(3, 1, BW_160),
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+ VHT_GROUP(4, 1, BW_160),
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+
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+ HE_GROUP(1, HE_GI_08, BW_20),
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+ HE_GROUP(2, HE_GI_08, BW_20),
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+ HE_GROUP(3, HE_GI_08, BW_20),
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+ HE_GROUP(4, HE_GI_08, BW_20),
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+ HE_GROUP(5, HE_GI_08, BW_20),
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+ HE_GROUP(6, HE_GI_08, BW_20),
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+ HE_GROUP(7, HE_GI_08, BW_20),
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+ HE_GROUP(8, HE_GI_08, BW_20),
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+
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+ HE_GROUP(1, HE_GI_16, BW_20),
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+ HE_GROUP(2, HE_GI_16, BW_20),
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+ HE_GROUP(3, HE_GI_16, BW_20),
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+ HE_GROUP(4, HE_GI_16, BW_20),
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+ HE_GROUP(5, HE_GI_16, BW_20),
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+ HE_GROUP(6, HE_GI_16, BW_20),
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+ HE_GROUP(7, HE_GI_16, BW_20),
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+ HE_GROUP(8, HE_GI_16, BW_20),
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+
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+ HE_GROUP(1, HE_GI_32, BW_20),
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+ HE_GROUP(2, HE_GI_32, BW_20),
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+ HE_GROUP(3, HE_GI_32, BW_20),
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+ HE_GROUP(4, HE_GI_32, BW_20),
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+ HE_GROUP(5, HE_GI_32, BW_20),
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+ HE_GROUP(6, HE_GI_32, BW_20),
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+ HE_GROUP(7, HE_GI_32, BW_20),
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+ HE_GROUP(8, HE_GI_32, BW_20),
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+
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|
+ HE_GROUP(1, HE_GI_08, BW_40),
|
|
+ HE_GROUP(2, HE_GI_08, BW_40),
|
|
+ HE_GROUP(3, HE_GI_08, BW_40),
|
|
+ HE_GROUP(4, HE_GI_08, BW_40),
|
|
+ HE_GROUP(5, HE_GI_08, BW_40),
|
|
+ HE_GROUP(6, HE_GI_08, BW_40),
|
|
+ HE_GROUP(7, HE_GI_08, BW_40),
|
|
+ HE_GROUP(8, HE_GI_08, BW_40),
|
|
+
|
|
+ HE_GROUP(1, HE_GI_16, BW_40),
|
|
+ HE_GROUP(2, HE_GI_16, BW_40),
|
|
+ HE_GROUP(3, HE_GI_16, BW_40),
|
|
+ HE_GROUP(4, HE_GI_16, BW_40),
|
|
+ HE_GROUP(5, HE_GI_16, BW_40),
|
|
+ HE_GROUP(6, HE_GI_16, BW_40),
|
|
+ HE_GROUP(7, HE_GI_16, BW_40),
|
|
+ HE_GROUP(8, HE_GI_16, BW_40),
|
|
+
|
|
+ HE_GROUP(1, HE_GI_32, BW_40),
|
|
+ HE_GROUP(2, HE_GI_32, BW_40),
|
|
+ HE_GROUP(3, HE_GI_32, BW_40),
|
|
+ HE_GROUP(4, HE_GI_32, BW_40),
|
|
+ HE_GROUP(5, HE_GI_32, BW_40),
|
|
+ HE_GROUP(6, HE_GI_32, BW_40),
|
|
+ HE_GROUP(7, HE_GI_32, BW_40),
|
|
+ HE_GROUP(8, HE_GI_32, BW_40),
|
|
+
|
|
+ HE_GROUP(1, HE_GI_08, BW_80),
|
|
+ HE_GROUP(2, HE_GI_08, BW_80),
|
|
+ HE_GROUP(3, HE_GI_08, BW_80),
|
|
+ HE_GROUP(4, HE_GI_08, BW_80),
|
|
+ HE_GROUP(5, HE_GI_08, BW_80),
|
|
+ HE_GROUP(6, HE_GI_08, BW_80),
|
|
+ HE_GROUP(7, HE_GI_08, BW_80),
|
|
+ HE_GROUP(8, HE_GI_08, BW_80),
|
|
+
|
|
+ HE_GROUP(1, HE_GI_16, BW_80),
|
|
+ HE_GROUP(2, HE_GI_16, BW_80),
|
|
+ HE_GROUP(3, HE_GI_16, BW_80),
|
|
+ HE_GROUP(4, HE_GI_16, BW_80),
|
|
+ HE_GROUP(5, HE_GI_16, BW_80),
|
|
+ HE_GROUP(6, HE_GI_16, BW_80),
|
|
+ HE_GROUP(7, HE_GI_16, BW_80),
|
|
+ HE_GROUP(8, HE_GI_16, BW_80),
|
|
+
|
|
+ HE_GROUP(1, HE_GI_32, BW_80),
|
|
+ HE_GROUP(2, HE_GI_32, BW_80),
|
|
+ HE_GROUP(3, HE_GI_32, BW_80),
|
|
+ HE_GROUP(4, HE_GI_32, BW_80),
|
|
+ HE_GROUP(5, HE_GI_32, BW_80),
|
|
+ HE_GROUP(6, HE_GI_32, BW_80),
|
|
+ HE_GROUP(7, HE_GI_32, BW_80),
|
|
+ HE_GROUP(8, HE_GI_32, BW_80),
|
|
+
|
|
+ HE_GROUP(1, HE_GI_08, BW_160),
|
|
+ HE_GROUP(2, HE_GI_08, BW_160),
|
|
+ HE_GROUP(3, HE_GI_08, BW_160),
|
|
+ HE_GROUP(4, HE_GI_08, BW_160),
|
|
+ HE_GROUP(5, HE_GI_08, BW_160),
|
|
+ HE_GROUP(6, HE_GI_08, BW_160),
|
|
+ HE_GROUP(7, HE_GI_08, BW_160),
|
|
+ HE_GROUP(8, HE_GI_08, BW_160),
|
|
+
|
|
+ HE_GROUP(1, HE_GI_16, BW_160),
|
|
+ HE_GROUP(2, HE_GI_16, BW_160),
|
|
+ HE_GROUP(3, HE_GI_16, BW_160),
|
|
+ HE_GROUP(4, HE_GI_16, BW_160),
|
|
+ HE_GROUP(5, HE_GI_16, BW_160),
|
|
+ HE_GROUP(6, HE_GI_16, BW_160),
|
|
+ HE_GROUP(7, HE_GI_16, BW_160),
|
|
+ HE_GROUP(8, HE_GI_16, BW_160),
|
|
+
|
|
+ HE_GROUP(1, HE_GI_32, BW_160),
|
|
+ HE_GROUP(2, HE_GI_32, BW_160),
|
|
+ HE_GROUP(3, HE_GI_32, BW_160),
|
|
+ HE_GROUP(4, HE_GI_32, BW_160),
|
|
+ HE_GROUP(5, HE_GI_32, BW_160),
|
|
+ HE_GROUP(6, HE_GI_32, BW_160),
|
|
+ HE_GROUP(7, HE_GI_32, BW_160),
|
|
+ HE_GROUP(8, HE_GI_32, BW_160),
|
|
+};
|
|
+
|
|
+static u32
|
|
+ieee80211_calc_legacy_rate_duration(u16 bitrate, bool short_pre,
|
|
+ bool cck, int len)
|
|
+{
|
|
+ u32 duration;
|
|
+
|
|
+ if (cck) {
|
|
+ duration = 144 + 48; /* preamble + PLCP */
|
|
+ if (short_pre)
|
|
+ duration >>= 1;
|
|
+
|
|
+ duration += 10; /* SIFS */
|
|
+ } else {
|
|
+ duration = 20 + 16; /* premable + SIFS */
|
|
+ }
|
|
+
|
|
+ len <<= 3;
|
|
+ duration += (len * 10) / bitrate;
|
|
+
|
|
+ return duration;
|
|
+}
|
|
+
|
|
+u32 ieee80211_calc_rx_airtime(struct ieee80211_hw *hw,
|
|
+ struct ieee80211_rx_status *status,
|
|
+ int len)
|
|
+{
|
|
+ struct ieee80211_supported_band *sband;
|
|
+ const struct ieee80211_rate *rate;
|
|
+ bool sgi = status->enc_flags & RX_ENC_FLAG_SHORT_GI;
|
|
+ bool sp = status->enc_flags & RX_ENC_FLAG_SHORTPRE;
|
|
+ int bw, streams;
|
|
+ int group, idx;
|
|
+ u32 duration;
|
|
+ bool cck;
|
|
+
|
|
+ switch (status->bw) {
|
|
+ case RATE_INFO_BW_20:
|
|
+ bw = BW_20;
|
|
+ break;
|
|
+ case RATE_INFO_BW_40:
|
|
+ bw = BW_40;
|
|
+ break;
|
|
+ case RATE_INFO_BW_80:
|
|
+ bw = BW_80;
|
|
+ break;
|
|
+ case RATE_INFO_BW_160:
|
|
+ bw = BW_160;
|
|
+ break;
|
|
+ default:
|
|
+ WARN_ON_ONCE(1);
|
|
+ return 0;
|
|
+ }
|
|
+
|
|
+ switch (status->encoding) {
|
|
+ case RX_ENC_LEGACY:
|
|
+ if (WARN_ON_ONCE(status->band > NL80211_BAND_5GHZ))
|
|
+ return 0;
|
|
+
|
|
+ sband = hw->wiphy->bands[status->band];
|
|
+ if (!sband || status->rate_idx > sband->n_bitrates)
|
|
+ return 0;
|
|
+
|
|
+ rate = &sband->bitrates[status->rate_idx];
|
|
+ cck = rate->flags & IEEE80211_RATE_MANDATORY_B;
|
|
+
|
|
+ return ieee80211_calc_legacy_rate_duration(rate->bitrate, sp,
|
|
+ cck, len);
|
|
+
|
|
+ case RX_ENC_VHT:
|
|
+ streams = status->nss;
|
|
+ idx = status->rate_idx;
|
|
+ group = VHT_GROUP_IDX(streams, sgi, bw);
|
|
+ break;
|
|
+ case RX_ENC_HT:
|
|
+ streams = ((status->rate_idx >> 3) & 3) + 1;
|
|
+ idx = status->rate_idx & 7;
|
|
+ group = HT_GROUP_IDX(streams, sgi, bw);
|
|
+ break;
|
|
+ case RX_ENC_HE:
|
|
+ streams = status->nss;
|
|
+ idx = status->rate_idx;
|
|
+ group = HE_GROUP_IDX(streams, status->he_gi, bw);
|
|
+ break;
|
|
+ default:
|
|
+ WARN_ON_ONCE(1);
|
|
+ return 0;
|
|
+ }
|
|
+
|
|
+ if (WARN_ON_ONCE((status->encoding != RX_ENC_HE && streams > 4) ||
|
|
+ (status->encoding == RX_ENC_HE && streams > 8)))
|
|
+ return 0;
|
|
+
|
|
+ duration = airtime_mcs_groups[group].duration[idx];
|
|
+ duration <<= airtime_mcs_groups[group].shift;
|
|
+ duration *= len;
|
|
+ duration /= AVG_PKT_SIZE;
|
|
+ duration /= 1024;
|
|
+
|
|
+ duration += 36 + (streams << 2);
|
|
+
|
|
+ return duration;
|
|
+}
|
|
+EXPORT_SYMBOL_GPL(ieee80211_calc_rx_airtime);
|
|
+
|
|
+static u32 ieee80211_calc_tx_airtime_rate(struct ieee80211_hw *hw,
|
|
+ struct ieee80211_tx_rate *rate,
|
|
+ u8 band, int len)
|
|
+{
|
|
+ struct ieee80211_rx_status stat = {
|
|
+ .band = band,
|
|
+ };
|
|
+
|
|
+ if (rate->idx < 0 || !rate->count)
|
|
+ return 0;
|
|
+
|
|
+ if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
|
|
+ stat.bw = RATE_INFO_BW_80;
|
|
+ else if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
|
|
+ stat.bw = RATE_INFO_BW_40;
|
|
+ else
|
|
+ stat.bw = RATE_INFO_BW_20;
|
|
+
|
|
+ stat.enc_flags = 0;
|
|
+ if (rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
|
|
+ stat.enc_flags |= RX_ENC_FLAG_SHORTPRE;
|
|
+ if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
|
|
+ stat.enc_flags |= RX_ENC_FLAG_SHORT_GI;
|
|
+
|
|
+ stat.rate_idx = rate->idx;
|
|
+ if (rate->flags & IEEE80211_TX_RC_VHT_MCS) {
|
|
+ stat.encoding = RX_ENC_VHT;
|
|
+ stat.rate_idx = ieee80211_rate_get_vht_mcs(rate);
|
|
+ stat.nss = ieee80211_rate_get_vht_nss(rate);
|
|
+ } else if (rate->flags & IEEE80211_TX_RC_MCS) {
|
|
+ stat.encoding = RX_ENC_HT;
|
|
+ } else {
|
|
+ stat.encoding = RX_ENC_LEGACY;
|
|
+ }
|
|
+
|
|
+ return ieee80211_calc_rx_airtime(hw, &stat, len);
|
|
+}
|
|
+
|
|
+u32 ieee80211_calc_tx_airtime(struct ieee80211_hw *hw,
|
|
+ struct ieee80211_tx_info *info,
|
|
+ int len)
|
|
+{
|
|
+ u32 duration = 0;
|
|
+ int i;
|
|
+
|
|
+ for (i = 0; i < ARRAY_SIZE(info->status.rates); i++) {
|
|
+ struct ieee80211_tx_rate *rate = &info->status.rates[i];
|
|
+ u32 cur_duration;
|
|
+
|
|
+ cur_duration = ieee80211_calc_tx_airtime_rate(hw, rate,
|
|
+ info->band, len);
|
|
+ if (!cur_duration)
|
|
+ break;
|
|
+
|
|
+ duration += cur_duration * rate->count;
|
|
+ }
|
|
+
|
|
+ return duration;
|
|
+}
|
|
+EXPORT_SYMBOL_GPL(ieee80211_calc_tx_airtime);
|
|
+
|
|
+u32 ieee80211_calc_expected_tx_airtime(struct ieee80211_hw *hw,
|
|
+ struct ieee80211_vif *vif,
|
|
+ struct ieee80211_sta *pubsta,
|
|
+ int len)
|
|
+{
|
|
+ struct ieee80211_supported_band *sband;
|
|
+ struct ieee80211_chanctx_conf *conf;
|
|
+ int rateidx, shift = 0;
|
|
+ bool cck, short_pream;
|
|
+ u32 basic_rates;
|
|
+ u8 band = 0;
|
|
+ u16 rate;
|
|
+
|
|
+ len += 38; /* Ethernet header length */
|
|
+
|
|
+ conf = rcu_dereference(vif->chanctx_conf);
|
|
+ if (conf) {
|
|
+ band = conf->def.chan->band;
|
|
+ shift = ieee80211_chandef_get_shift(&conf->def);
|
|
+ }
|
|
+
|
|
+ if (pubsta) {
|
|
+ struct sta_info *sta = container_of(pubsta, struct sta_info,
|
|
+ sta);
|
|
+
|
|
+ return ieee80211_calc_tx_airtime_rate(hw,
|
|
+ &sta->tx_stats.last_rate,
|
|
+ band, len);
|
|
+ }
|
|
+
|
|
+ if (!conf)
|
|
+ return 0;
|
|
+
|
|
+ /* No station to get latest rate from, so calculate the worst-case
|
|
+ * duration using the lowest configured basic rate.
|
|
+ */
|
|
+ sband = hw->wiphy->bands[band];
|
|
+
|
|
+ basic_rates = vif->bss_conf.basic_rates;
|
|
+ short_pream = vif->bss_conf.use_short_preamble;
|
|
+
|
|
+ rateidx = basic_rates ? ffs(basic_rates) - 1 : 0;
|
|
+ rate = sband->bitrates[rateidx].bitrate << shift;
|
|
+ cck = sband->bitrates[rateidx].flags & IEEE80211_RATE_MANDATORY_B;
|
|
+
|
|
+ return ieee80211_calc_legacy_rate_duration(rate, short_pream, cck, len);
|
|
+}
|
|
--- a/net/mac80211/ieee80211_i.h
|
|
+++ b/net/mac80211/ieee80211_i.h
|
|
@@ -2253,6 +2253,10 @@ const char *ieee80211_get_reason_code_st
|
|
|
|
extern const struct ethtool_ops ieee80211_ethtool_ops;
|
|
|
|
+u32 ieee80211_calc_expected_tx_airtime(struct ieee80211_hw *hw,
|
|
+ struct ieee80211_vif *vif,
|
|
+ struct ieee80211_sta *pubsta,
|
|
+ int len);
|
|
#ifdef CPTCFG_MAC80211_NOINLINE
|
|
#define debug_noinline noinline
|
|
#else
|