iwlwifi: add the MVM driver

Newer firmware revisions have a completely new
firmware API. This is the new driver for this
new API.

I've listed the people who directly contributed
code, but many others from various teams have
contributed in other ways.

Cc: Alexander Bondar <alexander.bondar@intel.com>
Cc: Amit Beka <amit.beka@intel.com>
Cc: Amnon Paz <amnonx.paz@intel.com>
Cc: Assaf Krauss <assaf.krauss@intel.com>
Cc: David Spinadel <david.spinadel@intel.com>
Cc: Dor Shaish <dor.shaish@intel.com>
Cc: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Cc: Eytan Lifshitz <eytan.lifshitz@intel.com>
Cc: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 393 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/mvm/rs.h b/drivers/net/wireless/iwlwifi/mvm/rs.h
new file mode 100644
index 000000000000..219c6857cc0f
--- /dev/null
+++ b/drivers/net/wireless/iwlwifi/mvm/rs.h
@@ -0,0 +1,393 @@
+/******************************************************************************
+ *
+ * Copyright(c) 2003 - 2013 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
+ *
+ * The full GNU General Public License is included in this distribution in the
+ * file called LICENSE.
+ *
+ * Contact Information:
+ *  Intel Linux Wireless <ilw@linux.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"
+
+struct iwl_rs_rate_info {
+        u8 plcp;        /* uCode API:  IWL_RATE_6M_PLCP, etc. */
+        u8 plcp_siso;   /* uCode API:  IWL_RATE_SISO_6M_PLCP, etc. */
+        u8 plcp_mimo2;  /* uCode API:  IWL_RATE_MIMO2_6M_PLCP, etc. */
+        u8 plcp_mimo3;  /* uCode API:  IWL_RATE_MIMO3_6M_PLCP, etc. */
+        u8 ieee;        /* MAC header:  IWL_RATE_6M_IEEE, etc. */
+        u8 prev_ieee;    /* previous rate in IEEE speeds */
+        u8 next_ieee;    /* next rate in IEEE speeds */
+        u8 prev_rs;      /* previous rate used in rs algo */
+        u8 next_rs;      /* next rate used in rs algo */
+        u8 prev_rs_tgg;  /* previous rate used in TGG rs algo */
+        u8 next_rs_tgg;  /* next rate used in TGG 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 OFDM high-throughput (HT) bit rates */
+enum {
+        IWL_RATE_SISO_6M_PLCP = 0,
+        IWL_RATE_SISO_12M_PLCP = 1,
+        IWL_RATE_SISO_18M_PLCP = 2,
+        IWL_RATE_SISO_24M_PLCP = 3,
+        IWL_RATE_SISO_36M_PLCP = 4,
+        IWL_RATE_SISO_48M_PLCP = 5,
+        IWL_RATE_SISO_54M_PLCP = 6,
+        IWL_RATE_SISO_60M_PLCP = 7,
+        IWL_RATE_MIMO2_6M_PLCP  = 0x8,
+        IWL_RATE_MIMO2_12M_PLCP = 0x9,
+        IWL_RATE_MIMO2_18M_PLCP = 0xa,
+        IWL_RATE_MIMO2_24M_PLCP = 0xb,
+        IWL_RATE_MIMO2_36M_PLCP = 0xc,
+        IWL_RATE_MIMO2_48M_PLCP = 0xd,
+        IWL_RATE_MIMO2_54M_PLCP = 0xe,
+        IWL_RATE_MIMO2_60M_PLCP = 0xf,
+        IWL_RATE_MIMO3_6M_PLCP  = 0x10,
+        IWL_RATE_MIMO3_12M_PLCP = 0x11,
+        IWL_RATE_MIMO3_18M_PLCP = 0x12,
+        IWL_RATE_MIMO3_24M_PLCP = 0x13,
+        IWL_RATE_MIMO3_36M_PLCP = 0x14,
+        IWL_RATE_MIMO3_48M_PLCP = 0x15,
+        IWL_RATE_MIMO3_54M_PLCP = 0x16,
+        IWL_RATE_MIMO3_60M_PLCP = 0x17,
+        IWL_RATE_SISO_INVM_PLCP,
+        IWL_RATE_MIMO2_INVM_PLCP = IWL_RATE_SISO_INVM_PLCP,
+        IWL_RATE_MIMO3_INVM_PLCP = IWL_RATE_SISO_INVM_PLCP,
+};
+
+/* MAC header values for bit rates */
+enum {
+        IWL_RATE_6M_IEEE  = 12,
+        IWL_RATE_9M_IEEE  = 18,
+        IWL_RATE_12M_IEEE = 24,
+        IWL_RATE_18M_IEEE = 36,
+        IWL_RATE_24M_IEEE = 48,
+        IWL_RATE_36M_IEEE = 72,
+        IWL_RATE_48M_IEEE = 96,
+        IWL_RATE_54M_IEEE = 108,
+        IWL_RATE_60M_IEEE = 120,
+        IWL_RATE_1M_IEEE  = 2,
+        IWL_RATE_2M_IEEE  = 4,
+        IWL_RATE_5M_IEEE  = 11,
+        IWL_RATE_11M_IEEE = 22,
+};
+
+#define IWL_RATES_MASK ((1 << IWL_RATE_COUNT) - 1)
+
+#define IWL_INVALID_VALUE    -1
+
+#define IWL_MIN_RSSI_VAL                 -100
+#define IWL_MAX_RSSI_VAL                    0
+
+/* These values specify how many Tx frame attempts before
+ * searching for a new modulation mode */
+#define IWL_LEGACY_FAILURE_LIMIT        160
+#define IWL_LEGACY_SUCCESS_LIMIT        480
+#define IWL_LEGACY_TABLE_COUNT          160
+
+#define IWL_NONE_LEGACY_FAILURE_LIMIT   400
+#define IWL_NONE_LEGACY_SUCCESS_LIMIT   4500
+#define IWL_NONE_LEGACY_TABLE_COUNT     1500
+
+/* Success ratio (ACKed / attempted tx frames) values (perfect is 128 * 100) */
+#define IWL_RS_GOOD_RATIO               12800   /* 100% */
+#define IWL_RATE_SCALE_SWITCH           10880   /*  85% */
+#define IWL_RATE_HIGH_TH                10880   /*  85% */
+#define IWL_RATE_INCREASE_TH            6400    /*  50% */
+#define IWL_RATE_DECREASE_TH            1920    /*  15% */
+
+/* possible actions when in legacy mode */
+#define IWL_LEGACY_SWITCH_ANTENNA1      0
+#define IWL_LEGACY_SWITCH_ANTENNA2      1
+#define IWL_LEGACY_SWITCH_SISO          2
+#define IWL_LEGACY_SWITCH_MIMO2_AB      3
+#define IWL_LEGACY_SWITCH_MIMO2_AC      4
+#define IWL_LEGACY_SWITCH_MIMO2_BC      5
+#define IWL_LEGACY_SWITCH_MIMO3_ABC     6
+
+/* possible actions when in siso mode */
+#define IWL_SISO_SWITCH_ANTENNA1        0
+#define IWL_SISO_SWITCH_ANTENNA2        1
+#define IWL_SISO_SWITCH_MIMO2_AB        2
+#define IWL_SISO_SWITCH_MIMO2_AC        3
+#define IWL_SISO_SWITCH_MIMO2_BC        4
+#define IWL_SISO_SWITCH_GI              5
+#define IWL_SISO_SWITCH_MIMO3_ABC       6
+
+
+/* possible actions when in mimo mode */
+#define IWL_MIMO2_SWITCH_ANTENNA1       0
+#define IWL_MIMO2_SWITCH_ANTENNA2       1
+#define IWL_MIMO2_SWITCH_SISO_A         2
+#define IWL_MIMO2_SWITCH_SISO_B         3
+#define IWL_MIMO2_SWITCH_SISO_C         4
+#define IWL_MIMO2_SWITCH_GI             5
+#define IWL_MIMO2_SWITCH_MIMO3_ABC      6
+
+
+/* possible actions when in mimo3 mode */
+#define IWL_MIMO3_SWITCH_ANTENNA1       0
+#define IWL_MIMO3_SWITCH_ANTENNA2       1
+#define IWL_MIMO3_SWITCH_SISO_A         2
+#define IWL_MIMO3_SWITCH_SISO_B         3
+#define IWL_MIMO3_SWITCH_SISO_C         4
+#define IWL_MIMO3_SWITCH_MIMO2_AB       5
+#define IWL_MIMO3_SWITCH_MIMO2_AC       6
+#define IWL_MIMO3_SWITCH_MIMO2_BC       7
+#define IWL_MIMO3_SWITCH_GI             8
+
+
+#define IWL_MAX_11N_MIMO3_SEARCH IWL_MIMO3_SWITCH_GI
+#define IWL_MAX_SEARCH IWL_MIMO2_SWITCH_MIMO3_ABC
+
+/*FIXME:RS:add possible actions for MIMO3*/
+
+#define IWL_ACTION_LIMIT                3       /* # possible actions */
+
+#define LINK_QUAL_AGG_TIME_LIMIT_DEF    (4000) /* 4 milliseconds */
+#define LINK_QUAL_AGG_TIME_LIMIT_MAX    (8000)
+#define LINK_QUAL_AGG_TIME_LIMIT_MIN    (100)
+
+#define LINK_QUAL_AGG_DISABLE_START_DEF (3)
+#define LINK_QUAL_AGG_DISABLE_START_MAX (255)
+#define LINK_QUAL_AGG_DISABLE_START_MIN (0)
+
+#define LINK_QUAL_AGG_FRAME_LIMIT_DEF   (63)
+#define LINK_QUAL_AGG_FRAME_LIMIT_MAX   (63)
+#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_LOAD_THRESHOLD  10
+#define IWL_AGG_ALL_TID         0xff
+#define TID_QUEUE_CELL_SPACING  50      /*mS */
+#define TID_QUEUE_MAX_SIZE      20
+#define TID_ROUND_VALUE         5       /* mS */
+
+#define TID_MAX_TIME_DIFF ((TID_QUEUE_MAX_SIZE - 1) * TID_QUEUE_CELL_SPACING)
+#define TIME_WRAP_AROUND(x, y) (((y) > (x)) ? (y) - (x) : (0-(x)) + (y))
+
+enum iwl_table_type {
+        LQ_NONE,
+        LQ_G,           /* legacy types */
+        LQ_A,
+        LQ_SISO,        /* high-throughput types */
+        LQ_MIMO2,
+        LQ_MIMO3,
+        LQ_MAX,
+};
+
+#define is_legacy(tbl) (((tbl) == LQ_G) || ((tbl) == LQ_A))
+#define is_siso(tbl) ((tbl) == LQ_SISO)
+#define is_mimo2(tbl) ((tbl) == LQ_MIMO2)
+#define is_mimo3(tbl) ((tbl) == LQ_MIMO3)
+#define is_mimo(tbl) (is_mimo2(tbl) || is_mimo3(tbl))
+#define is_Ht(tbl) (is_siso(tbl) || is_mimo(tbl))
+#define is_a_band(tbl) ((tbl) == LQ_A)
+#define is_g_and(tbl) ((tbl) == LQ_G)
+
+#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_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 */
+        unsigned long stamp;
+};
+
+/**
+ * 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 {
+        enum iwl_table_type lq_type;
+        u8 ant_type;
+        u8 is_SGI;      /* 1 = short guard interval */
+        u8 is_ht40;     /* 1 = 40 MHz channel width */
+        u8 action;      /* change modulation; IWL_[LEGACY/SISO/MIMO]_SWITCH_* */
+        u8 max_search;  /* maximun number of tables we can search */
+        s32 *expected_tpt;      /* throughput metrics; expected_tpt_G, etc. */
+        u32 current_rate;  /* rate_n_flags, uCode API format */
+        struct iwl_rate_scale_data win[IWL_RATE_COUNT]; /* rate histories */
+};
+
+struct iwl_traffic_load {
+        unsigned long time_stamp;       /* age of the oldest statistics */
+        u32 packet_count[TID_QUEUE_MAX_SIZE];   /* packet count in this time
+                                                 * slice */
+        u32 total;                      /* total num of packets during the
+                                         * last TID_MAX_TIME_DIFF */
+        u8 queue_count;                 /* number of queues that has
+                                         * been used since the last cleanup */
+        u8 head;                        /* start of the circular buffer */
+};
+
+/**
+ * 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 enable_counter;      /* indicates HT mode */
+        u8 stay_in_tbl;         /* 1: disallow, 0: allow search for new mode */
+        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 */
+
+        u8 action_counter;      /* # mode-switch actions tried */
+        u8 is_green;
+        enum ieee80211_band band;
+
+        /* The following are bitmaps of rates; IWL_RATE_6M_MASK, etc. */
+        u32 supp_rates;
+        u16 active_legacy_rate;
+        u16 active_siso_rate;
+        u16 active_mimo2_rate;
+        u16 active_mimo3_rate;
+        s8 max_rate_idx;     /* Max rate set by user */
+        u8 missed_rate_counter;
+
+        struct iwl_lq_cmd lq;
+        struct iwl_scale_tbl_info lq_info[LQ_SIZE]; /* "active", "search" */
+        struct iwl_traffic_load load[IWL_MAX_TID_COUNT];
+        u8 tx_agg_tid_en;
+#ifdef CONFIG_MAC80211_DEBUGFS
+        struct dentry *rs_sta_dbgfs_scale_table_file;
+        struct dentry *rs_sta_dbgfs_stats_table_file;
+        struct dentry *rs_sta_dbgfs_rate_scale_data_file;
+        struct dentry *rs_sta_dbgfs_tx_agg_tid_en_file;
+        u32 dbg_fixed_rate;
+#endif
+        struct iwl_mvm *drv;
+
+        /* used to be in sta_info */
+        int last_txrate_idx;
+        /* last tx rate_n_flags */
+        u32 last_rate_n_flags;
+        /* packets destined for this STA are aggregated */
+        u8 is_agg;
+        /* BT traffic this sta was last updated in */
+        u8 last_bt_traffic;
+};
+
+static inline u8 num_of_ant(u8 mask)
+{
+        return  !!((mask) & ANT_A) +
+                !!((mask) & ANT_B) +
+                !!((mask) & ANT_C);
+}
+
+/* Initialize station's rate scaling information after adding station */
+extern void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm,
+                                 struct ieee80211_sta *sta,
+                                 enum ieee80211_band band);
+
+/**
+ * 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
+ *
+ */
+extern 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.
+ */
+extern void iwl_mvm_rate_control_unregister(void);
+
+#endif /* __rs__ */