Adding upstream version 4.19.249.upstream/4.19.249

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

1 files changed, 469 insertions, 0 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rs.h b/drivers/net/wireless/intel/iwlwifi/mvm/rs.h
new file mode 100644
index 000000000..d0f47899f
--- /dev/null
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rs.h
@@ -0,0 +1,469 @@
+/******************************************************************************
+ *
+ * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
+ * Copyright(c) 2015 Intel Mobile Communications GmbH
+ * Copyright(c) 2017 Intel Deutschland GmbH
+ * Copyright(c) 2018 Intel Corporation
+ *
+ * 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.
+ *
+ * The full GNU General Public License is included in this distribution in the
+ * file called LICENSE.
+ *
+ * Contact Information:
+ *  Intel Linux Wireless <linuxwifi@intel.com>
+ * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+ *
+ *****************************************************************************/
+
+#ifndef __rs_h__
+#define __rs_h__
+
+#include <net/mac80211.h>
+
+#include "iwl-config.h"
+
+#include "fw-api.h"
+#include "iwl-trans.h"
+
+#define RS_NAME "iwl-mvm-rs"
+
+struct iwl_rs_rate_info {
+	u8 plcp;	  /* uCode API:  IWL_RATE_6M_PLCP, etc. */
+	u8 plcp_ht_siso;  /* uCode API:  IWL_RATE_SISO_6M_PLCP, etc. */
+	u8 plcp_ht_mimo2; /* uCode API:  IWL_RATE_MIMO2_6M_PLCP, etc. */
+	u8 plcp_vht_siso;
+	u8 plcp_vht_mimo2;
+	u8 prev_rs;      /* previous rate used in rs algo */
+	u8 next_rs;      /* next rate used in rs algo */
+};
+
+#define IWL_RATE_60M_PLCP 3
+
+enum {
+	IWL_RATE_INVM_INDEX = IWL_RATE_COUNT,
+	IWL_RATE_INVALID = IWL_RATE_COUNT,
+};
+
+#define LINK_QUAL_MAX_RETRY_NUM 16
+
+enum {
+	IWL_RATE_6M_INDEX_TABLE = 0,
+	IWL_RATE_9M_INDEX_TABLE,
+	IWL_RATE_12M_INDEX_TABLE,
+	IWL_RATE_18M_INDEX_TABLE,
+	IWL_RATE_24M_INDEX_TABLE,
+	IWL_RATE_36M_INDEX_TABLE,
+	IWL_RATE_48M_INDEX_TABLE,
+	IWL_RATE_54M_INDEX_TABLE,
+	IWL_RATE_1M_INDEX_TABLE,
+	IWL_RATE_2M_INDEX_TABLE,
+	IWL_RATE_5M_INDEX_TABLE,
+	IWL_RATE_11M_INDEX_TABLE,
+	IWL_RATE_INVM_INDEX_TABLE = IWL_RATE_INVM_INDEX - 1,
+};
+
+/* #define vs. enum to keep from defaulting to 'large integer' */
+#define	IWL_RATE_6M_MASK   (1 << IWL_RATE_6M_INDEX)
+#define	IWL_RATE_9M_MASK   (1 << IWL_RATE_9M_INDEX)
+#define	IWL_RATE_12M_MASK  (1 << IWL_RATE_12M_INDEX)
+#define	IWL_RATE_18M_MASK  (1 << IWL_RATE_18M_INDEX)
+#define	IWL_RATE_24M_MASK  (1 << IWL_RATE_24M_INDEX)
+#define	IWL_RATE_36M_MASK  (1 << IWL_RATE_36M_INDEX)
+#define	IWL_RATE_48M_MASK  (1 << IWL_RATE_48M_INDEX)
+#define	IWL_RATE_54M_MASK  (1 << IWL_RATE_54M_INDEX)
+#define IWL_RATE_60M_MASK  (1 << IWL_RATE_60M_INDEX)
+#define	IWL_RATE_1M_MASK   (1 << IWL_RATE_1M_INDEX)
+#define	IWL_RATE_2M_MASK   (1 << IWL_RATE_2M_INDEX)
+#define	IWL_RATE_5M_MASK   (1 << IWL_RATE_5M_INDEX)
+#define	IWL_RATE_11M_MASK  (1 << IWL_RATE_11M_INDEX)
+
+
+/* uCode API values for HT/VHT bit rates */
+enum {
+	IWL_RATE_HT_SISO_MCS_0_PLCP = 0,
+	IWL_RATE_HT_SISO_MCS_1_PLCP = 1,
+	IWL_RATE_HT_SISO_MCS_2_PLCP = 2,
+	IWL_RATE_HT_SISO_MCS_3_PLCP = 3,
+	IWL_RATE_HT_SISO_MCS_4_PLCP = 4,
+	IWL_RATE_HT_SISO_MCS_5_PLCP = 5,
+	IWL_RATE_HT_SISO_MCS_6_PLCP = 6,
+	IWL_RATE_HT_SISO_MCS_7_PLCP = 7,
+	IWL_RATE_HT_MIMO2_MCS_0_PLCP = 0x8,
+	IWL_RATE_HT_MIMO2_MCS_1_PLCP = 0x9,
+	IWL_RATE_HT_MIMO2_MCS_2_PLCP = 0xA,
+	IWL_RATE_HT_MIMO2_MCS_3_PLCP = 0xB,
+	IWL_RATE_HT_MIMO2_MCS_4_PLCP = 0xC,
+	IWL_RATE_HT_MIMO2_MCS_5_PLCP = 0xD,
+	IWL_RATE_HT_MIMO2_MCS_6_PLCP = 0xE,
+	IWL_RATE_HT_MIMO2_MCS_7_PLCP = 0xF,
+	IWL_RATE_VHT_SISO_MCS_0_PLCP = 0,
+	IWL_RATE_VHT_SISO_MCS_1_PLCP = 1,
+	IWL_RATE_VHT_SISO_MCS_2_PLCP = 2,
+	IWL_RATE_VHT_SISO_MCS_3_PLCP = 3,
+	IWL_RATE_VHT_SISO_MCS_4_PLCP = 4,
+	IWL_RATE_VHT_SISO_MCS_5_PLCP = 5,
+	IWL_RATE_VHT_SISO_MCS_6_PLCP = 6,
+	IWL_RATE_VHT_SISO_MCS_7_PLCP = 7,
+	IWL_RATE_VHT_SISO_MCS_8_PLCP = 8,
+	IWL_RATE_VHT_SISO_MCS_9_PLCP = 9,
+	IWL_RATE_VHT_MIMO2_MCS_0_PLCP = 0x10,
+	IWL_RATE_VHT_MIMO2_MCS_1_PLCP = 0x11,
+	IWL_RATE_VHT_MIMO2_MCS_2_PLCP = 0x12,
+	IWL_RATE_VHT_MIMO2_MCS_3_PLCP = 0x13,
+	IWL_RATE_VHT_MIMO2_MCS_4_PLCP = 0x14,
+	IWL_RATE_VHT_MIMO2_MCS_5_PLCP = 0x15,
+	IWL_RATE_VHT_MIMO2_MCS_6_PLCP = 0x16,
+	IWL_RATE_VHT_MIMO2_MCS_7_PLCP = 0x17,
+	IWL_RATE_VHT_MIMO2_MCS_8_PLCP = 0x18,
+	IWL_RATE_VHT_MIMO2_MCS_9_PLCP = 0x19,
+	IWL_RATE_HT_SISO_MCS_INV_PLCP,
+	IWL_RATE_HT_MIMO2_MCS_INV_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
+	IWL_RATE_VHT_SISO_MCS_INV_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
+	IWL_RATE_VHT_MIMO2_MCS_INV_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
+	IWL_RATE_HT_SISO_MCS_8_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
+	IWL_RATE_HT_SISO_MCS_9_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
+	IWL_RATE_HT_MIMO2_MCS_8_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
+	IWL_RATE_HT_MIMO2_MCS_9_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
+};
+
+#define IWL_RATES_MASK ((1 << IWL_RATE_COUNT) - 1)
+
+#define IWL_INVALID_VALUE    -1
+
+#define TPC_MAX_REDUCTION		15
+#define TPC_NO_REDUCTION		0
+#define TPC_INVALID			0xff
+
+#define LINK_QUAL_AGG_FRAME_LIMIT_DEF	(63)
+#define LINK_QUAL_AGG_FRAME_LIMIT_MAX	(63)
+/*
+ * FIXME - various places in firmware API still use u8,
+ * e.g. LQ command and SCD config command.
+ * This should be 256 instead.
+ */
+#define LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF	(255)
+#define LINK_QUAL_AGG_FRAME_LIMIT_GEN2_MAX	(255)
+#define LINK_QUAL_AGG_FRAME_LIMIT_MIN	(0)
+
+#define LQ_SIZE		2	/* 2 mode tables:  "Active" and "Search" */
+
+/* load per tid defines for A-MPDU activation */
+#define IWL_AGG_TPT_THREHOLD	0
+#define IWL_AGG_ALL_TID		0xff
+
+enum iwl_table_type {
+	LQ_NONE,
+	LQ_LEGACY_G,	/* legacy types */
+	LQ_LEGACY_A,
+	LQ_HT_SISO,	/* HT types */
+	LQ_HT_MIMO2,
+	LQ_VHT_SISO,    /* VHT types */
+	LQ_VHT_MIMO2,
+	LQ_HE_SISO,     /* HE types */
+	LQ_HE_MIMO2,
+	LQ_MAX,
+};
+
+struct rs_rate {
+	int index;
+	enum iwl_table_type type;
+	u8 ant;
+	u32 bw;
+	bool sgi;
+	bool ldpc;
+	bool stbc;
+	bool bfer;
+};
+
+
+#define is_type_legacy(type) (((type) == LQ_LEGACY_G) || \
+			      ((type) == LQ_LEGACY_A))
+#define is_type_ht_siso(type) ((type) == LQ_HT_SISO)
+#define is_type_ht_mimo2(type) ((type) == LQ_HT_MIMO2)
+#define is_type_vht_siso(type) ((type) == LQ_VHT_SISO)
+#define is_type_vht_mimo2(type) ((type) == LQ_VHT_MIMO2)
+#define is_type_he_siso(type) ((type) == LQ_HE_SISO)
+#define is_type_he_mimo2(type) ((type) == LQ_HE_MIMO2)
+#define is_type_siso(type) (is_type_ht_siso(type) || is_type_vht_siso(type) || \
+			    is_type_he_siso(type))
+#define is_type_mimo2(type) (is_type_ht_mimo2(type) || \
+			     is_type_vht_mimo2(type) || is_type_he_mimo2(type))
+#define is_type_mimo(type) (is_type_mimo2(type))
+#define is_type_ht(type) (is_type_ht_siso(type) || is_type_ht_mimo2(type))
+#define is_type_vht(type) (is_type_vht_siso(type) || is_type_vht_mimo2(type))
+#define is_type_he(type) (is_type_he_siso(type) || is_type_he_mimo2(type))
+#define is_type_a_band(type) ((type) == LQ_LEGACY_A)
+#define is_type_g_band(type) ((type) == LQ_LEGACY_G)
+
+#define is_legacy(rate)       is_type_legacy((rate)->type)
+#define is_ht_siso(rate)      is_type_ht_siso((rate)->type)
+#define is_ht_mimo2(rate)     is_type_ht_mimo2((rate)->type)
+#define is_vht_siso(rate)     is_type_vht_siso((rate)->type)
+#define is_vht_mimo2(rate)    is_type_vht_mimo2((rate)->type)
+#define is_siso(rate)         is_type_siso((rate)->type)
+#define is_mimo2(rate)        is_type_mimo2((rate)->type)
+#define is_mimo(rate)         is_type_mimo((rate)->type)
+#define is_ht(rate)           is_type_ht((rate)->type)
+#define is_vht(rate)          is_type_vht((rate)->type)
+#define is_he(rate)           is_type_he((rate)->type)
+#define is_a_band(rate)       is_type_a_band((rate)->type)
+#define is_g_band(rate)       is_type_g_band((rate)->type)
+
+#define is_ht20(rate)         ((rate)->bw == RATE_MCS_CHAN_WIDTH_20)
+#define is_ht40(rate)         ((rate)->bw == RATE_MCS_CHAN_WIDTH_40)
+#define is_ht80(rate)         ((rate)->bw == RATE_MCS_CHAN_WIDTH_80)
+#define is_ht160(rate)        ((rate)->bw == RATE_MCS_CHAN_WIDTH_160)
+
+#define IWL_MAX_MCS_DISPLAY_SIZE	12
+
+struct iwl_rate_mcs_info {
+	char	mbps[IWL_MAX_MCS_DISPLAY_SIZE];
+	char	mcs[IWL_MAX_MCS_DISPLAY_SIZE];
+};
+
+/**
+ * struct iwl_lq_sta_rs_fw - rate and related statistics for RS in FW
+ * @last_rate_n_flags: last rate reported by FW
+ * @sta_id: the id of the station
+#ifdef CONFIG_MAC80211_DEBUGFS
+ * @dbg_fixed_rate: for debug, use fixed rate if not 0
+ * @dbg_agg_frame_count_lim: for debug, max number of frames in A-MPDU
+#endif
+ * @chains: bitmask of chains reported in %chain_signal
+ * @chain_signal: per chain signal strength
+ * @last_rssi: last rssi reported
+ * @drv: pointer back to the driver data
+ */
+
+struct iwl_lq_sta_rs_fw {
+	/* last tx rate_n_flags */
+	u32 last_rate_n_flags;
+
+	/* persistent fields - initialized only once - keep last! */
+	struct lq_sta_pers_rs_fw {
+		u32 sta_id;
+#ifdef CONFIG_MAC80211_DEBUGFS
+		u32 dbg_fixed_rate;
+		u16 dbg_agg_frame_count_lim;
+#endif
+		u8 chains;
+		s8 chain_signal[IEEE80211_MAX_CHAINS];
+		s8 last_rssi;
+		struct iwl_mvm *drv;
+	} pers;
+};
+
+/**
+ * struct iwl_rate_scale_data -- tx success history for one rate
+ */
+struct iwl_rate_scale_data {
+	u64 data;		/* bitmap of successful frames */
+	s32 success_counter;	/* number of frames successful */
+	s32 success_ratio;	/* per-cent * 128  */
+	s32 counter;		/* number of frames attempted */
+	s32 average_tpt;	/* success ratio * expected throughput */
+};
+
+/* Possible Tx columns
+ * Tx Column = a combo of legacy/siso/mimo x antenna x SGI
+ */
+enum rs_column {
+	RS_COLUMN_LEGACY_ANT_A = 0,
+	RS_COLUMN_LEGACY_ANT_B,
+	RS_COLUMN_SISO_ANT_A,
+	RS_COLUMN_SISO_ANT_B,
+	RS_COLUMN_SISO_ANT_A_SGI,
+	RS_COLUMN_SISO_ANT_B_SGI,
+	RS_COLUMN_MIMO2,
+	RS_COLUMN_MIMO2_SGI,
+
+	RS_COLUMN_LAST = RS_COLUMN_MIMO2_SGI,
+	RS_COLUMN_COUNT = RS_COLUMN_LAST + 1,
+	RS_COLUMN_INVALID,
+};
+
+enum rs_ss_force_opt {
+	RS_SS_FORCE_NONE = 0,
+	RS_SS_FORCE_STBC,
+	RS_SS_FORCE_BFER,
+	RS_SS_FORCE_SISO,
+};
+
+/* Packet stats per rate */
+struct rs_rate_stats {
+	u64 success;
+	u64 total;
+};
+
+/**
+ * struct iwl_scale_tbl_info -- tx params and success history for all rates
+ *
+ * There are two of these in struct iwl_lq_sta,
+ * one for "active", and one for "search".
+ */
+struct iwl_scale_tbl_info {
+	struct rs_rate rate;
+	enum rs_column column;
+	const u16 *expected_tpt;	/* throughput metrics; expected_tpt_G, etc. */
+	struct iwl_rate_scale_data win[IWL_RATE_COUNT]; /* rate histories */
+	/* per txpower-reduction history */
+	struct iwl_rate_scale_data tpc_win[TPC_MAX_REDUCTION + 1];
+};
+
+enum {
+	RS_STATE_SEARCH_CYCLE_STARTED,
+	RS_STATE_SEARCH_CYCLE_ENDED,
+	RS_STATE_STAY_IN_COLUMN,
+};
+
+/**
+ * struct iwl_lq_sta -- driver's rate scaling private structure
+ *
+ * Pointer to this gets passed back and forth between driver and mac80211.
+ */
+struct iwl_lq_sta {
+	u8 active_tbl;		/* index of active table, range 0-1 */
+	u8 rs_state;            /* RS_STATE_* */
+	u8 search_better_tbl;	/* 1: currently trying alternate mode */
+	s32 last_tpt;
+
+	/* The following determine when to search for a new mode */
+	u32 table_count_limit;
+	u32 max_failure_limit;	/* # failed frames before new search */
+	u32 max_success_limit;	/* # successful frames before new search */
+	u32 table_count;
+	u32 total_failed;	/* total failed frames, any/all rates */
+	u32 total_success;	/* total successful frames, any/all rates */
+	u64 flush_timer;	/* time staying in mode before new search */
+
+	u32 visited_columns;    /* Bitmask marking which Tx columns were
+				 * explored during a search cycle
+				 */
+	u64 last_tx;
+	bool is_vht;
+	bool ldpc;              /* LDPC Rx is supported by the STA */
+	bool stbc_capable;      /* Tx STBC is supported by chip and Rx by STA */
+	bool bfer_capable;      /* Remote supports beamformee and we BFer */
+
+	enum nl80211_band band;
+
+	/* The following are bitmaps of rates; IWL_RATE_6M_MASK, etc. */
+	unsigned long active_legacy_rate;
+	unsigned long active_siso_rate;
+	unsigned long active_mimo2_rate;
+
+	/* Highest rate per Tx mode */
+	u8 max_legacy_rate_idx;
+	u8 max_siso_rate_idx;
+	u8 max_mimo2_rate_idx;
+
+	/* Optimal rate based on RSSI and STA caps.
+	 * Used only to reflect link speed to userspace.
+	 */
+	struct rs_rate optimal_rate;
+	unsigned long optimal_rate_mask;
+	const struct rs_init_rate_info *optimal_rates;
+	int optimal_nentries;
+
+	u8 missed_rate_counter;
+
+	struct iwl_lq_cmd lq;
+	struct iwl_scale_tbl_info lq_info[LQ_SIZE]; /* "active", "search" */
+	u8 tx_agg_tid_en;
+
+	/* last tx rate_n_flags */
+	u32 last_rate_n_flags;
+	/* packets destined for this STA are aggregated */
+	u8 is_agg;
+
+	/* tx power reduce for this sta */
+	int tpc_reduce;
+
+	/* persistent fields - initialized only once - keep last! */
+	struct lq_sta_pers {
+#ifdef CONFIG_MAC80211_DEBUGFS
+		u32 dbg_fixed_rate;
+		u8 dbg_fixed_txp_reduction;
+
+		/* force STBC/BFER/SISO for testing */
+		enum rs_ss_force_opt ss_force;
+#endif
+		u8 chains;
+		s8 chain_signal[IEEE80211_MAX_CHAINS];
+		s8 last_rssi;
+		struct rs_rate_stats tx_stats[RS_COLUMN_COUNT][IWL_RATE_COUNT];
+		struct iwl_mvm *drv;
+	} pers;
+};
+
+/* ieee80211_tx_info's status_driver_data[0] is packed with lq color and txp
+ * Note, it's iwlmvm <-> mac80211 interface.
+ * bits 0-7: reduced tx power
+ * bits 8-10: LQ command's color
+ */
+#define RS_DRV_DATA_TXP_MSK 0xff
+#define RS_DRV_DATA_LQ_COLOR_POS 8
+#define RS_DRV_DATA_LQ_COLOR_MSK (7 << RS_DRV_DATA_LQ_COLOR_POS)
+#define RS_DRV_DATA_LQ_COLOR_GET(_f) (((_f) & RS_DRV_DATA_LQ_COLOR_MSK) >>\
+				      RS_DRV_DATA_LQ_COLOR_POS)
+#define RS_DRV_DATA_PACK(_c, _p) ((void *)(uintptr_t)\
+				  (((uintptr_t)_p) |\
+				   ((_c) << RS_DRV_DATA_LQ_COLOR_POS)))
+
+/* Initialize station's rate scaling information after adding station */
+void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
+			  enum nl80211_band band, bool init);
+
+/* Notify RS about Tx status */
+void iwl_mvm_rs_tx_status(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
+			  int tid, struct ieee80211_tx_info *info, bool ndp);
+
+/**
+ * iwl_rate_control_register - Register the rate control algorithm callbacks
+ *
+ * Since the rate control algorithm is hardware specific, there is no need
+ * or reason to place it as a stand alone module.  The driver can call
+ * iwl_rate_control_register in order to register the rate control callbacks
+ * with the mac80211 subsystem.  This should be performed prior to calling
+ * ieee80211_register_hw
+ *
+ */
+int iwl_mvm_rate_control_register(void);
+
+/**
+ * iwl_rate_control_unregister - Unregister the rate control callbacks
+ *
+ * This should be called after calling ieee80211_unregister_hw, but before
+ * the driver is unloaded.
+ */
+void iwl_mvm_rate_control_unregister(void);
+
+struct iwl_mvm_sta;
+
+int iwl_mvm_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
+			  bool enable);
+
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+void iwl_mvm_reset_frame_stats(struct iwl_mvm *mvm);
+#endif
+
+#ifdef CONFIG_MAC80211_DEBUGFS
+void rs_remove_sta_debugfs(void *mvm, void *mvm_sta);
+#endif
+
+void iwl_mvm_rs_add_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta);
+void rs_fw_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
+		     enum nl80211_band band, bool update);
+int rs_fw_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
+			bool enable);
+void iwl_mvm_tlc_update_notif(struct iwl_mvm *mvm,
+			      struct iwl_rx_cmd_buffer *rxb);
+#endif /* __rs__ */