linux/drivers/net/wireless/marvell/mwl8k.c
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   1/*
   2 * drivers/net/wireless/mwl8k.c
   3 * Driver for Marvell TOPDOG 802.11 Wireless cards
   4 *
   5 * Copyright (C) 2008, 2009, 2010 Marvell Semiconductor Inc.
   6 *
   7 * This file is licensed under the terms of the GNU General Public
   8 * License version 2.  This program is licensed "as is" without any
   9 * warranty of any kind, whether express or implied.
  10 */
  11
  12#include <linux/interrupt.h>
  13#include <linux/module.h>
  14#include <linux/kernel.h>
  15#include <linux/sched.h>
  16#include <linux/spinlock.h>
  17#include <linux/list.h>
  18#include <linux/pci.h>
  19#include <linux/delay.h>
  20#include <linux/completion.h>
  21#include <linux/etherdevice.h>
  22#include <linux/slab.h>
  23#include <net/mac80211.h>
  24#include <linux/moduleparam.h>
  25#include <linux/firmware.h>
  26#include <linux/workqueue.h>
  27
  28#define MWL8K_DESC      "Marvell TOPDOG(R) 802.11 Wireless Network Driver"
  29#define MWL8K_NAME      KBUILD_MODNAME
  30#define MWL8K_VERSION   "0.13"
  31
  32/* Module parameters */
  33static bool ap_mode_default;
  34module_param(ap_mode_default, bool, 0);
  35MODULE_PARM_DESC(ap_mode_default,
  36                 "Set to 1 to make ap mode the default instead of sta mode");
  37
  38/* Register definitions */
  39#define MWL8K_HIU_GEN_PTR                       0x00000c10
  40#define  MWL8K_MODE_STA                          0x0000005a
  41#define  MWL8K_MODE_AP                           0x000000a5
  42#define MWL8K_HIU_INT_CODE                      0x00000c14
  43#define  MWL8K_FWSTA_READY                       0xf0f1f2f4
  44#define  MWL8K_FWAP_READY                        0xf1f2f4a5
  45#define  MWL8K_INT_CODE_CMD_FINISHED             0x00000005
  46#define MWL8K_HIU_SCRATCH                       0x00000c40
  47
  48/* Host->device communications */
  49#define MWL8K_HIU_H2A_INTERRUPT_EVENTS          0x00000c18
  50#define MWL8K_HIU_H2A_INTERRUPT_STATUS          0x00000c1c
  51#define MWL8K_HIU_H2A_INTERRUPT_MASK            0x00000c20
  52#define MWL8K_HIU_H2A_INTERRUPT_CLEAR_SEL       0x00000c24
  53#define MWL8K_HIU_H2A_INTERRUPT_STATUS_MASK     0x00000c28
  54#define  MWL8K_H2A_INT_DUMMY                     (1 << 20)
  55#define  MWL8K_H2A_INT_RESET                     (1 << 15)
  56#define  MWL8K_H2A_INT_DOORBELL                  (1 << 1)
  57#define  MWL8K_H2A_INT_PPA_READY                 (1 << 0)
  58
  59/* Device->host communications */
  60#define MWL8K_HIU_A2H_INTERRUPT_EVENTS          0x00000c2c
  61#define MWL8K_HIU_A2H_INTERRUPT_STATUS          0x00000c30
  62#define MWL8K_HIU_A2H_INTERRUPT_MASK            0x00000c34
  63#define MWL8K_HIU_A2H_INTERRUPT_CLEAR_SEL       0x00000c38
  64#define MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK     0x00000c3c
  65#define  MWL8K_A2H_INT_DUMMY                     (1 << 20)
  66#define  MWL8K_A2H_INT_BA_WATCHDOG               (1 << 14)
  67#define  MWL8K_A2H_INT_CHNL_SWITCHED             (1 << 11)
  68#define  MWL8K_A2H_INT_QUEUE_EMPTY               (1 << 10)
  69#define  MWL8K_A2H_INT_RADAR_DETECT              (1 << 7)
  70#define  MWL8K_A2H_INT_RADIO_ON                  (1 << 6)
  71#define  MWL8K_A2H_INT_RADIO_OFF                 (1 << 5)
  72#define  MWL8K_A2H_INT_MAC_EVENT                 (1 << 3)
  73#define  MWL8K_A2H_INT_OPC_DONE                  (1 << 2)
  74#define  MWL8K_A2H_INT_RX_READY                  (1 << 1)
  75#define  MWL8K_A2H_INT_TX_DONE                   (1 << 0)
  76
  77/* HW micro second timer register
  78 * located at offset 0xA600. This
  79 * will be used to timestamp tx
  80 * packets.
  81 */
  82
  83#define MWL8K_HW_TIMER_REGISTER                 0x0000a600
  84#define BBU_RXRDY_CNT_REG                       0x0000a860
  85#define NOK_CCA_CNT_REG                         0x0000a6a0
  86#define BBU_AVG_NOISE_VAL                       0x67
  87
  88#define MWL8K_A2H_EVENTS        (MWL8K_A2H_INT_DUMMY | \
  89                                 MWL8K_A2H_INT_CHNL_SWITCHED | \
  90                                 MWL8K_A2H_INT_QUEUE_EMPTY | \
  91                                 MWL8K_A2H_INT_RADAR_DETECT | \
  92                                 MWL8K_A2H_INT_RADIO_ON | \
  93                                 MWL8K_A2H_INT_RADIO_OFF | \
  94                                 MWL8K_A2H_INT_MAC_EVENT | \
  95                                 MWL8K_A2H_INT_OPC_DONE | \
  96                                 MWL8K_A2H_INT_RX_READY | \
  97                                 MWL8K_A2H_INT_TX_DONE | \
  98                                 MWL8K_A2H_INT_BA_WATCHDOG)
  99
 100#define MWL8K_RX_QUEUES         1
 101#define MWL8K_TX_WMM_QUEUES     4
 102#define MWL8K_MAX_AMPDU_QUEUES  8
 103#define MWL8K_MAX_TX_QUEUES     (MWL8K_TX_WMM_QUEUES + MWL8K_MAX_AMPDU_QUEUES)
 104#define mwl8k_tx_queues(priv)   (MWL8K_TX_WMM_QUEUES + (priv)->num_ampdu_queues)
 105
 106/* txpriorities are mapped with hw queues.
 107 * Each hw queue has a txpriority.
 108 */
 109#define TOTAL_HW_TX_QUEUES      8
 110
 111/* Each HW queue can have one AMPDU stream.
 112 * But, because one of the hw queue is reserved,
 113 * maximum AMPDU queues that can be created are
 114 * one short of total tx queues.
 115 */
 116#define MWL8K_NUM_AMPDU_STREAMS (TOTAL_HW_TX_QUEUES - 1)
 117
 118#define MWL8K_NUM_CHANS 18
 119
 120struct rxd_ops {
 121        int rxd_size;
 122        void (*rxd_init)(void *rxd, dma_addr_t next_dma_addr);
 123        void (*rxd_refill)(void *rxd, dma_addr_t addr, int len);
 124        int (*rxd_process)(void *rxd, struct ieee80211_rx_status *status,
 125                           __le16 *qos, s8 *noise);
 126};
 127
 128struct mwl8k_device_info {
 129        char *part_name;
 130        char *helper_image;
 131        char *fw_image_sta;
 132        char *fw_image_ap;
 133        struct rxd_ops *ap_rxd_ops;
 134        u32 fw_api_ap;
 135};
 136
 137struct mwl8k_rx_queue {
 138        int rxd_count;
 139
 140        /* hw receives here */
 141        int head;
 142
 143        /* refill descs here */
 144        int tail;
 145
 146        void *rxd;
 147        dma_addr_t rxd_dma;
 148        struct {
 149                struct sk_buff *skb;
 150                DEFINE_DMA_UNMAP_ADDR(dma);
 151        } *buf;
 152};
 153
 154struct mwl8k_tx_queue {
 155        /* hw transmits here */
 156        int head;
 157
 158        /* sw appends here */
 159        int tail;
 160
 161        unsigned int len;
 162        struct mwl8k_tx_desc *txd;
 163        dma_addr_t txd_dma;
 164        struct sk_buff **skb;
 165};
 166
 167enum {
 168        AMPDU_NO_STREAM,
 169        AMPDU_STREAM_NEW,
 170        AMPDU_STREAM_IN_PROGRESS,
 171        AMPDU_STREAM_ACTIVE,
 172};
 173
 174struct mwl8k_ampdu_stream {
 175        struct ieee80211_sta *sta;
 176        u8 tid;
 177        u8 state;
 178        u8 idx;
 179};
 180
 181struct mwl8k_priv {
 182        struct ieee80211_hw *hw;
 183        struct pci_dev *pdev;
 184        int irq;
 185
 186        struct mwl8k_device_info *device_info;
 187
 188        void __iomem *sram;
 189        void __iomem *regs;
 190
 191        /* firmware */
 192        const struct firmware *fw_helper;
 193        const struct firmware *fw_ucode;
 194
 195        /* hardware/firmware parameters */
 196        bool ap_fw;
 197        struct rxd_ops *rxd_ops;
 198        struct ieee80211_supported_band band_24;
 199        struct ieee80211_channel channels_24[14];
 200        struct ieee80211_rate rates_24[13];
 201        struct ieee80211_supported_band band_50;
 202        struct ieee80211_channel channels_50[9];
 203        struct ieee80211_rate rates_50[8];
 204        u32 ap_macids_supported;
 205        u32 sta_macids_supported;
 206
 207        /* Ampdu stream information */
 208        u8 num_ampdu_queues;
 209        spinlock_t stream_lock;
 210        struct mwl8k_ampdu_stream ampdu[MWL8K_MAX_AMPDU_QUEUES];
 211        struct work_struct watchdog_ba_handle;
 212
 213        /* firmware access */
 214        struct mutex fw_mutex;
 215        struct task_struct *fw_mutex_owner;
 216        struct task_struct *hw_restart_owner;
 217        int fw_mutex_depth;
 218        struct completion *hostcmd_wait;
 219
 220        atomic_t watchdog_event_pending;
 221
 222        /* lock held over TX and TX reap */
 223        spinlock_t tx_lock;
 224
 225        /* TX quiesce completion, protected by fw_mutex and tx_lock */
 226        struct completion *tx_wait;
 227
 228        /* List of interfaces.  */
 229        u32 macids_used;
 230        struct list_head vif_list;
 231
 232        /* power management status cookie from firmware */
 233        u32 *cookie;
 234        dma_addr_t cookie_dma;
 235
 236        u16 num_mcaddrs;
 237        u8 hw_rev;
 238        u32 fw_rev;
 239        u32 caps;
 240
 241        /*
 242         * Running count of TX packets in flight, to avoid
 243         * iterating over the transmit rings each time.
 244         */
 245        int pending_tx_pkts;
 246
 247        struct mwl8k_rx_queue rxq[MWL8K_RX_QUEUES];
 248        struct mwl8k_tx_queue txq[MWL8K_MAX_TX_QUEUES];
 249        u32 txq_offset[MWL8K_MAX_TX_QUEUES];
 250
 251        bool radio_on;
 252        bool radio_short_preamble;
 253        bool sniffer_enabled;
 254        bool wmm_enabled;
 255
 256        /* XXX need to convert this to handle multiple interfaces */
 257        bool capture_beacon;
 258        u8 capture_bssid[ETH_ALEN];
 259        struct sk_buff *beacon_skb;
 260
 261        /*
 262         * This FJ worker has to be global as it is scheduled from the
 263         * RX handler.  At this point we don't know which interface it
 264         * belongs to until the list of bssids waiting to complete join
 265         * is checked.
 266         */
 267        struct work_struct finalize_join_worker;
 268
 269        /* Tasklet to perform TX reclaim.  */
 270        struct tasklet_struct poll_tx_task;
 271
 272        /* Tasklet to perform RX.  */
 273        struct tasklet_struct poll_rx_task;
 274
 275        /* Most recently reported noise in dBm */
 276        s8 noise;
 277
 278        /*
 279         * preserve the queue configurations so they can be restored if/when
 280         * the firmware image is swapped.
 281         */
 282        struct ieee80211_tx_queue_params wmm_params[MWL8K_TX_WMM_QUEUES];
 283
 284        /* To perform the task of reloading the firmware */
 285        struct work_struct fw_reload;
 286        bool hw_restart_in_progress;
 287
 288        /* async firmware loading state */
 289        unsigned fw_state;
 290        char *fw_pref;
 291        char *fw_alt;
 292        bool is_8764;
 293        struct completion firmware_loading_complete;
 294
 295        /* bitmap of running BSSes */
 296        u32 running_bsses;
 297
 298        /* ACS related */
 299        bool sw_scan_start;
 300        struct ieee80211_channel *acs_chan;
 301        unsigned long channel_time;
 302        struct survey_info survey[MWL8K_NUM_CHANS];
 303};
 304
 305#define MAX_WEP_KEY_LEN         13
 306#define NUM_WEP_KEYS            4
 307
 308/* Per interface specific private data */
 309struct mwl8k_vif {
 310        struct list_head list;
 311        struct ieee80211_vif *vif;
 312
 313        /* Firmware macid for this vif.  */
 314        int macid;
 315
 316        /* Non AMPDU sequence number assigned by driver.  */
 317        u16 seqno;
 318
 319        /* Saved WEP keys */
 320        struct {
 321                u8 enabled;
 322                u8 key[sizeof(struct ieee80211_key_conf) + MAX_WEP_KEY_LEN];
 323        } wep_key_conf[NUM_WEP_KEYS];
 324
 325        /* BSSID */
 326        u8 bssid[ETH_ALEN];
 327
 328        /* A flag to indicate is HW crypto is enabled for this bssid */
 329        bool is_hw_crypto_enabled;
 330};
 331#define MWL8K_VIF(_vif) ((struct mwl8k_vif *)&((_vif)->drv_priv))
 332#define IEEE80211_KEY_CONF(_u8) ((struct ieee80211_key_conf *)(_u8))
 333
 334struct tx_traffic_info {
 335        u32 start_time;
 336        u32 pkts;
 337};
 338
 339#define MWL8K_MAX_TID 8
 340struct mwl8k_sta {
 341        /* Index into station database. Returned by UPDATE_STADB.  */
 342        u8 peer_id;
 343        u8 is_ampdu_allowed;
 344        struct tx_traffic_info tx_stats[MWL8K_MAX_TID];
 345};
 346#define MWL8K_STA(_sta) ((struct mwl8k_sta *)&((_sta)->drv_priv))
 347
 348static const struct ieee80211_channel mwl8k_channels_24[] = {
 349        { .band = NL80211_BAND_2GHZ, .center_freq = 2412, .hw_value = 1, },
 350        { .band = NL80211_BAND_2GHZ, .center_freq = 2417, .hw_value = 2, },
 351        { .band = NL80211_BAND_2GHZ, .center_freq = 2422, .hw_value = 3, },
 352        { .band = NL80211_BAND_2GHZ, .center_freq = 2427, .hw_value = 4, },
 353        { .band = NL80211_BAND_2GHZ, .center_freq = 2432, .hw_value = 5, },
 354        { .band = NL80211_BAND_2GHZ, .center_freq = 2437, .hw_value = 6, },
 355        { .band = NL80211_BAND_2GHZ, .center_freq = 2442, .hw_value = 7, },
 356        { .band = NL80211_BAND_2GHZ, .center_freq = 2447, .hw_value = 8, },
 357        { .band = NL80211_BAND_2GHZ, .center_freq = 2452, .hw_value = 9, },
 358        { .band = NL80211_BAND_2GHZ, .center_freq = 2457, .hw_value = 10, },
 359        { .band = NL80211_BAND_2GHZ, .center_freq = 2462, .hw_value = 11, },
 360        { .band = NL80211_BAND_2GHZ, .center_freq = 2467, .hw_value = 12, },
 361        { .band = NL80211_BAND_2GHZ, .center_freq = 2472, .hw_value = 13, },
 362        { .band = NL80211_BAND_2GHZ, .center_freq = 2484, .hw_value = 14, },
 363};
 364
 365static const struct ieee80211_rate mwl8k_rates_24[] = {
 366        { .bitrate = 10, .hw_value = 2, },
 367        { .bitrate = 20, .hw_value = 4, },
 368        { .bitrate = 55, .hw_value = 11, },
 369        { .bitrate = 110, .hw_value = 22, },
 370        { .bitrate = 220, .hw_value = 44, },
 371        { .bitrate = 60, .hw_value = 12, },
 372        { .bitrate = 90, .hw_value = 18, },
 373        { .bitrate = 120, .hw_value = 24, },
 374        { .bitrate = 180, .hw_value = 36, },
 375        { .bitrate = 240, .hw_value = 48, },
 376        { .bitrate = 360, .hw_value = 72, },
 377        { .bitrate = 480, .hw_value = 96, },
 378        { .bitrate = 540, .hw_value = 108, },
 379};
 380
 381static const struct ieee80211_channel mwl8k_channels_50[] = {
 382        { .band = NL80211_BAND_5GHZ, .center_freq = 5180, .hw_value = 36, },
 383        { .band = NL80211_BAND_5GHZ, .center_freq = 5200, .hw_value = 40, },
 384        { .band = NL80211_BAND_5GHZ, .center_freq = 5220, .hw_value = 44, },
 385        { .band = NL80211_BAND_5GHZ, .center_freq = 5240, .hw_value = 48, },
 386        { .band = NL80211_BAND_5GHZ, .center_freq = 5745, .hw_value = 149, },
 387        { .band = NL80211_BAND_5GHZ, .center_freq = 5765, .hw_value = 153, },
 388        { .band = NL80211_BAND_5GHZ, .center_freq = 5785, .hw_value = 157, },
 389        { .band = NL80211_BAND_5GHZ, .center_freq = 5805, .hw_value = 161, },
 390        { .band = NL80211_BAND_5GHZ, .center_freq = 5825, .hw_value = 165, },
 391};
 392
 393static const struct ieee80211_rate mwl8k_rates_50[] = {
 394        { .bitrate = 60, .hw_value = 12, },
 395        { .bitrate = 90, .hw_value = 18, },
 396        { .bitrate = 120, .hw_value = 24, },
 397        { .bitrate = 180, .hw_value = 36, },
 398        { .bitrate = 240, .hw_value = 48, },
 399        { .bitrate = 360, .hw_value = 72, },
 400        { .bitrate = 480, .hw_value = 96, },
 401        { .bitrate = 540, .hw_value = 108, },
 402};
 403
 404/* Set or get info from Firmware */
 405#define MWL8K_CMD_GET                   0x0000
 406#define MWL8K_CMD_SET                   0x0001
 407#define MWL8K_CMD_SET_LIST              0x0002
 408
 409/* Firmware command codes */
 410#define MWL8K_CMD_CODE_DNLD             0x0001
 411#define MWL8K_CMD_GET_HW_SPEC           0x0003
 412#define MWL8K_CMD_SET_HW_SPEC           0x0004
 413#define MWL8K_CMD_MAC_MULTICAST_ADR     0x0010
 414#define MWL8K_CMD_GET_STAT              0x0014
 415#define MWL8K_CMD_BBP_REG_ACCESS        0x001a
 416#define MWL8K_CMD_RADIO_CONTROL         0x001c
 417#define MWL8K_CMD_RF_TX_POWER           0x001e
 418#define MWL8K_CMD_TX_POWER              0x001f
 419#define MWL8K_CMD_RF_ANTENNA            0x0020
 420#define MWL8K_CMD_SET_BEACON            0x0100          /* per-vif */
 421#define MWL8K_CMD_SET_PRE_SCAN          0x0107
 422#define MWL8K_CMD_SET_POST_SCAN         0x0108
 423#define MWL8K_CMD_SET_RF_CHANNEL        0x010a
 424#define MWL8K_CMD_SET_AID               0x010d
 425#define MWL8K_CMD_SET_RATE              0x0110
 426#define MWL8K_CMD_SET_FINALIZE_JOIN     0x0111
 427#define MWL8K_CMD_RTS_THRESHOLD         0x0113
 428#define MWL8K_CMD_SET_SLOT              0x0114
 429#define MWL8K_CMD_SET_EDCA_PARAMS       0x0115
 430#define MWL8K_CMD_SET_WMM_MODE          0x0123
 431#define MWL8K_CMD_MIMO_CONFIG           0x0125
 432#define MWL8K_CMD_USE_FIXED_RATE        0x0126
 433#define MWL8K_CMD_ENABLE_SNIFFER        0x0150
 434#define MWL8K_CMD_SET_MAC_ADDR          0x0202          /* per-vif */
 435#define MWL8K_CMD_SET_RATEADAPT_MODE    0x0203
 436#define MWL8K_CMD_GET_WATCHDOG_BITMAP   0x0205
 437#define MWL8K_CMD_DEL_MAC_ADDR          0x0206          /* per-vif */
 438#define MWL8K_CMD_BSS_START             0x1100          /* per-vif */
 439#define MWL8K_CMD_SET_NEW_STN           0x1111          /* per-vif */
 440#define MWL8K_CMD_UPDATE_ENCRYPTION     0x1122          /* per-vif */
 441#define MWL8K_CMD_UPDATE_STADB          0x1123
 442#define MWL8K_CMD_BASTREAM              0x1125
 443
 444#define MWL8K_LEGACY_5G_RATE_OFFSET \
 445        (ARRAY_SIZE(mwl8k_rates_24) - ARRAY_SIZE(mwl8k_rates_50))
 446
 447static const char *mwl8k_cmd_name(__le16 cmd, char *buf, int bufsize)
 448{
 449        u16 command = le16_to_cpu(cmd);
 450
 451#define MWL8K_CMDNAME(x)        case MWL8K_CMD_##x: do {\
 452                                        snprintf(buf, bufsize, "%s", #x);\
 453                                        return buf;\
 454                                        } while (0)
 455        switch (command & ~0x8000) {
 456                MWL8K_CMDNAME(CODE_DNLD);
 457                MWL8K_CMDNAME(GET_HW_SPEC);
 458                MWL8K_CMDNAME(SET_HW_SPEC);
 459                MWL8K_CMDNAME(MAC_MULTICAST_ADR);
 460                MWL8K_CMDNAME(GET_STAT);
 461                MWL8K_CMDNAME(RADIO_CONTROL);
 462                MWL8K_CMDNAME(RF_TX_POWER);
 463                MWL8K_CMDNAME(TX_POWER);
 464                MWL8K_CMDNAME(RF_ANTENNA);
 465                MWL8K_CMDNAME(SET_BEACON);
 466                MWL8K_CMDNAME(SET_PRE_SCAN);
 467                MWL8K_CMDNAME(SET_POST_SCAN);
 468                MWL8K_CMDNAME(SET_RF_CHANNEL);
 469                MWL8K_CMDNAME(SET_AID);
 470                MWL8K_CMDNAME(SET_RATE);
 471                MWL8K_CMDNAME(SET_FINALIZE_JOIN);
 472                MWL8K_CMDNAME(RTS_THRESHOLD);
 473                MWL8K_CMDNAME(SET_SLOT);
 474                MWL8K_CMDNAME(SET_EDCA_PARAMS);
 475                MWL8K_CMDNAME(SET_WMM_MODE);
 476                MWL8K_CMDNAME(MIMO_CONFIG);
 477                MWL8K_CMDNAME(USE_FIXED_RATE);
 478                MWL8K_CMDNAME(ENABLE_SNIFFER);
 479                MWL8K_CMDNAME(SET_MAC_ADDR);
 480                MWL8K_CMDNAME(SET_RATEADAPT_MODE);
 481                MWL8K_CMDNAME(BSS_START);
 482                MWL8K_CMDNAME(SET_NEW_STN);
 483                MWL8K_CMDNAME(UPDATE_ENCRYPTION);
 484                MWL8K_CMDNAME(UPDATE_STADB);
 485                MWL8K_CMDNAME(BASTREAM);
 486                MWL8K_CMDNAME(GET_WATCHDOG_BITMAP);
 487        default:
 488                snprintf(buf, bufsize, "0x%x", cmd);
 489        }
 490#undef MWL8K_CMDNAME
 491
 492        return buf;
 493}
 494
 495/* Hardware and firmware reset */
 496static void mwl8k_hw_reset(struct mwl8k_priv *priv)
 497{
 498        iowrite32(MWL8K_H2A_INT_RESET,
 499                priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
 500        iowrite32(MWL8K_H2A_INT_RESET,
 501                priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
 502        msleep(20);
 503}
 504
 505/* Release fw image */
 506static void mwl8k_release_fw(const struct firmware **fw)
 507{
 508        if (*fw == NULL)
 509                return;
 510        release_firmware(*fw);
 511        *fw = NULL;
 512}
 513
 514static void mwl8k_release_firmware(struct mwl8k_priv *priv)
 515{
 516        mwl8k_release_fw(&priv->fw_ucode);
 517        mwl8k_release_fw(&priv->fw_helper);
 518}
 519
 520/* states for asynchronous f/w loading */
 521static void mwl8k_fw_state_machine(const struct firmware *fw, void *context);
 522enum {
 523        FW_STATE_INIT = 0,
 524        FW_STATE_LOADING_PREF,
 525        FW_STATE_LOADING_ALT,
 526        FW_STATE_ERROR,
 527};
 528
 529/* Request fw image */
 530static int mwl8k_request_fw(struct mwl8k_priv *priv,
 531                            const char *fname, const struct firmware **fw,
 532                            bool nowait)
 533{
 534        /* release current image */
 535        if (*fw != NULL)
 536                mwl8k_release_fw(fw);
 537
 538        if (nowait)
 539                return request_firmware_nowait(THIS_MODULE, 1, fname,
 540                                               &priv->pdev->dev, GFP_KERNEL,
 541                                               priv, mwl8k_fw_state_machine);
 542        else
 543                return request_firmware(fw, fname, &priv->pdev->dev);
 544}
 545
 546static int mwl8k_request_firmware(struct mwl8k_priv *priv, char *fw_image,
 547                                  bool nowait)
 548{
 549        struct mwl8k_device_info *di = priv->device_info;
 550        int rc;
 551
 552        if (di->helper_image != NULL) {
 553                if (nowait)
 554                        rc = mwl8k_request_fw(priv, di->helper_image,
 555                                              &priv->fw_helper, true);
 556                else
 557                        rc = mwl8k_request_fw(priv, di->helper_image,
 558                                              &priv->fw_helper, false);
 559                if (rc)
 560                        printk(KERN_ERR "%s: Error requesting helper fw %s\n",
 561                               pci_name(priv->pdev), di->helper_image);
 562
 563                if (rc || nowait)
 564                        return rc;
 565        }
 566
 567        if (nowait) {
 568                /*
 569                 * if we get here, no helper image is needed.  Skip the
 570                 * FW_STATE_INIT state.
 571                 */
 572                priv->fw_state = FW_STATE_LOADING_PREF;
 573                rc = mwl8k_request_fw(priv, fw_image,
 574                                      &priv->fw_ucode,
 575                                      true);
 576        } else
 577                rc = mwl8k_request_fw(priv, fw_image,
 578                                      &priv->fw_ucode, false);
 579        if (rc) {
 580                printk(KERN_ERR "%s: Error requesting firmware file %s\n",
 581                       pci_name(priv->pdev), fw_image);
 582                mwl8k_release_fw(&priv->fw_helper);
 583                return rc;
 584        }
 585
 586        return 0;
 587}
 588
 589struct mwl8k_cmd_pkt {
 590        __le16  code;
 591        __le16  length;
 592        __u8    seq_num;
 593        __u8    macid;
 594        __le16  result;
 595        char    payload[0];
 596} __packed;
 597
 598/*
 599 * Firmware loading.
 600 */
 601static int
 602mwl8k_send_fw_load_cmd(struct mwl8k_priv *priv, void *data, int length)
 603{
 604        void __iomem *regs = priv->regs;
 605        dma_addr_t dma_addr;
 606        int loops;
 607
 608        dma_addr = pci_map_single(priv->pdev, data, length, PCI_DMA_TODEVICE);
 609        if (pci_dma_mapping_error(priv->pdev, dma_addr))
 610                return -ENOMEM;
 611
 612        iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR);
 613        iowrite32(0, regs + MWL8K_HIU_INT_CODE);
 614        iowrite32(MWL8K_H2A_INT_DOORBELL,
 615                regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
 616        iowrite32(MWL8K_H2A_INT_DUMMY,
 617                regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
 618
 619        loops = 1000;
 620        do {
 621                u32 int_code;
 622                if (priv->is_8764) {
 623                        int_code = ioread32(regs +
 624                                            MWL8K_HIU_H2A_INTERRUPT_STATUS);
 625                        if (int_code == 0)
 626                                break;
 627                } else {
 628                        int_code = ioread32(regs + MWL8K_HIU_INT_CODE);
 629                        if (int_code == MWL8K_INT_CODE_CMD_FINISHED) {
 630                                iowrite32(0, regs + MWL8K_HIU_INT_CODE);
 631                                break;
 632                        }
 633                }
 634                cond_resched();
 635                udelay(1);
 636        } while (--loops);
 637
 638        pci_unmap_single(priv->pdev, dma_addr, length, PCI_DMA_TODEVICE);
 639
 640        return loops ? 0 : -ETIMEDOUT;
 641}
 642
 643static int mwl8k_load_fw_image(struct mwl8k_priv *priv,
 644                                const u8 *data, size_t length)
 645{
 646        struct mwl8k_cmd_pkt *cmd;
 647        int done;
 648        int rc = 0;
 649
 650        cmd = kmalloc(sizeof(*cmd) + 256, GFP_KERNEL);
 651        if (cmd == NULL)
 652                return -ENOMEM;
 653
 654        cmd->code = cpu_to_le16(MWL8K_CMD_CODE_DNLD);
 655        cmd->seq_num = 0;
 656        cmd->macid = 0;
 657        cmd->result = 0;
 658
 659        done = 0;
 660        while (length) {
 661                int block_size = length > 256 ? 256 : length;
 662
 663                memcpy(cmd->payload, data + done, block_size);
 664                cmd->length = cpu_to_le16(block_size);
 665
 666                rc = mwl8k_send_fw_load_cmd(priv, cmd,
 667                                                sizeof(*cmd) + block_size);
 668                if (rc)
 669                        break;
 670
 671                done += block_size;
 672                length -= block_size;
 673        }
 674
 675        if (!rc) {
 676                cmd->length = 0;
 677                rc = mwl8k_send_fw_load_cmd(priv, cmd, sizeof(*cmd));
 678        }
 679
 680        kfree(cmd);
 681
 682        return rc;
 683}
 684
 685static int mwl8k_feed_fw_image(struct mwl8k_priv *priv,
 686                                const u8 *data, size_t length)
 687{
 688        unsigned char *buffer;
 689        int may_continue, rc = 0;
 690        u32 done, prev_block_size;
 691
 692        buffer = kmalloc(1024, GFP_KERNEL);
 693        if (buffer == NULL)
 694                return -ENOMEM;
 695
 696        done = 0;
 697        prev_block_size = 0;
 698        may_continue = 1000;
 699        while (may_continue > 0) {
 700                u32 block_size;
 701
 702                block_size = ioread32(priv->regs + MWL8K_HIU_SCRATCH);
 703                if (block_size & 1) {
 704                        block_size &= ~1;
 705                        may_continue--;
 706                } else {
 707                        done += prev_block_size;
 708                        length -= prev_block_size;
 709                }
 710
 711                if (block_size > 1024 || block_size > length) {
 712                        rc = -EOVERFLOW;
 713                        break;
 714                }
 715
 716                if (length == 0) {
 717                        rc = 0;
 718                        break;
 719                }
 720
 721                if (block_size == 0) {
 722                        rc = -EPROTO;
 723                        may_continue--;
 724                        udelay(1);
 725                        continue;
 726                }
 727
 728                prev_block_size = block_size;
 729                memcpy(buffer, data + done, block_size);
 730
 731                rc = mwl8k_send_fw_load_cmd(priv, buffer, block_size);
 732                if (rc)
 733                        break;
 734        }
 735
 736        if (!rc && length != 0)
 737                rc = -EREMOTEIO;
 738
 739        kfree(buffer);
 740
 741        return rc;
 742}
 743
 744static int mwl8k_load_firmware(struct ieee80211_hw *hw)
 745{
 746        struct mwl8k_priv *priv = hw->priv;
 747        const struct firmware *fw = priv->fw_ucode;
 748        int rc;
 749        int loops;
 750
 751        if (!memcmp(fw->data, "\x01\x00\x00\x00", 4) && !priv->is_8764) {
 752                const struct firmware *helper = priv->fw_helper;
 753
 754                if (helper == NULL) {
 755                        printk(KERN_ERR "%s: helper image needed but none "
 756                               "given\n", pci_name(priv->pdev));
 757                        return -EINVAL;
 758                }
 759
 760                rc = mwl8k_load_fw_image(priv, helper->data, helper->size);
 761                if (rc) {
 762                        printk(KERN_ERR "%s: unable to load firmware "
 763                               "helper image\n", pci_name(priv->pdev));
 764                        return rc;
 765                }
 766                msleep(20);
 767
 768                rc = mwl8k_feed_fw_image(priv, fw->data, fw->size);
 769        } else {
 770                if (priv->is_8764)
 771                        rc = mwl8k_feed_fw_image(priv, fw->data, fw->size);
 772                else
 773                        rc = mwl8k_load_fw_image(priv, fw->data, fw->size);
 774        }
 775
 776        if (rc) {
 777                printk(KERN_ERR "%s: unable to load firmware image\n",
 778                       pci_name(priv->pdev));
 779                return rc;
 780        }
 781
 782        iowrite32(MWL8K_MODE_STA, priv->regs + MWL8K_HIU_GEN_PTR);
 783
 784        loops = 500000;
 785        do {
 786                u32 ready_code;
 787
 788                ready_code = ioread32(priv->regs + MWL8K_HIU_INT_CODE);
 789                if (ready_code == MWL8K_FWAP_READY) {
 790                        priv->ap_fw = true;
 791                        break;
 792                } else if (ready_code == MWL8K_FWSTA_READY) {
 793                        priv->ap_fw = false;
 794                        break;
 795                }
 796
 797                cond_resched();
 798                udelay(1);
 799        } while (--loops);
 800
 801        return loops ? 0 : -ETIMEDOUT;
 802}
 803
 804
 805/* DMA header used by firmware and hardware.  */
 806struct mwl8k_dma_data {
 807        __le16 fwlen;
 808        struct ieee80211_hdr wh;
 809        char data[0];
 810} __packed;
 811
 812/* Routines to add/remove DMA header from skb.  */
 813static inline void mwl8k_remove_dma_header(struct sk_buff *skb, __le16 qos)
 814{
 815        struct mwl8k_dma_data *tr;
 816        int hdrlen;
 817
 818        tr = (struct mwl8k_dma_data *)skb->data;
 819        hdrlen = ieee80211_hdrlen(tr->wh.frame_control);
 820
 821        if (hdrlen != sizeof(tr->wh)) {
 822                if (ieee80211_is_data_qos(tr->wh.frame_control)) {
 823                        memmove(tr->data - hdrlen, &tr->wh, hdrlen - 2);
 824                        *((__le16 *)(tr->data - 2)) = qos;
 825                } else {
 826                        memmove(tr->data - hdrlen, &tr->wh, hdrlen);
 827                }
 828        }
 829
 830        if (hdrlen != sizeof(*tr))
 831                skb_pull(skb, sizeof(*tr) - hdrlen);
 832}
 833
 834#define REDUCED_TX_HEADROOM     8
 835
 836static void
 837mwl8k_add_dma_header(struct mwl8k_priv *priv, struct sk_buff *skb,
 838                                                int head_pad, int tail_pad)
 839{
 840        struct ieee80211_hdr *wh;
 841        int hdrlen;
 842        int reqd_hdrlen;
 843        struct mwl8k_dma_data *tr;
 844
 845        /*
 846         * Add a firmware DMA header; the firmware requires that we
 847         * present a 2-byte payload length followed by a 4-address
 848         * header (without QoS field), followed (optionally) by any
 849         * WEP/ExtIV header (but only filled in for CCMP).
 850         */
 851        wh = (struct ieee80211_hdr *)skb->data;
 852
 853        hdrlen = ieee80211_hdrlen(wh->frame_control);
 854
 855        /*
 856         * Check if skb_resize is required because of
 857         * tx_headroom adjustment.
 858         */
 859        if (priv->ap_fw && (hdrlen < (sizeof(struct ieee80211_cts)
 860                                                + REDUCED_TX_HEADROOM))) {
 861                if (pskb_expand_head(skb, REDUCED_TX_HEADROOM, 0, GFP_ATOMIC)) {
 862
 863                        wiphy_err(priv->hw->wiphy,
 864                                        "Failed to reallocate TX buffer\n");
 865                        return;
 866                }
 867                skb->truesize += REDUCED_TX_HEADROOM;
 868        }
 869
 870        reqd_hdrlen = sizeof(*tr) + head_pad;
 871
 872        if (hdrlen != reqd_hdrlen)
 873                skb_push(skb, reqd_hdrlen - hdrlen);
 874
 875        if (ieee80211_is_data_qos(wh->frame_control))
 876                hdrlen -= IEEE80211_QOS_CTL_LEN;
 877
 878        tr = (struct mwl8k_dma_data *)skb->data;
 879        if (wh != &tr->wh)
 880                memmove(&tr->wh, wh, hdrlen);
 881        if (hdrlen != sizeof(tr->wh))
 882                memset(((void *)&tr->wh) + hdrlen, 0, sizeof(tr->wh) - hdrlen);
 883
 884        /*
 885         * Firmware length is the length of the fully formed "802.11
 886         * payload".  That is, everything except for the 802.11 header.
 887         * This includes all crypto material including the MIC.
 888         */
 889        tr->fwlen = cpu_to_le16(skb->len - sizeof(*tr) + tail_pad);
 890}
 891
 892static void mwl8k_encapsulate_tx_frame(struct mwl8k_priv *priv,
 893                struct sk_buff *skb)
 894{
 895        struct ieee80211_hdr *wh;
 896        struct ieee80211_tx_info *tx_info;
 897        struct ieee80211_key_conf *key_conf;
 898        int data_pad;
 899        int head_pad = 0;
 900
 901        wh = (struct ieee80211_hdr *)skb->data;
 902
 903        tx_info = IEEE80211_SKB_CB(skb);
 904
 905        key_conf = NULL;
 906        if (ieee80211_is_data(wh->frame_control))
 907                key_conf = tx_info->control.hw_key;
 908
 909        /*
 910         * Make sure the packet header is in the DMA header format (4-address
 911         * without QoS), and add head & tail padding when HW crypto is enabled.
 912         *
 913         * We have the following trailer padding requirements:
 914         * - WEP: 4 trailer bytes (ICV)
 915         * - TKIP: 12 trailer bytes (8 MIC + 4 ICV)
 916         * - CCMP: 8 trailer bytes (MIC)
 917         */
 918        data_pad = 0;
 919        if (key_conf != NULL) {
 920                head_pad = key_conf->iv_len;
 921                switch (key_conf->cipher) {
 922                case WLAN_CIPHER_SUITE_WEP40:
 923                case WLAN_CIPHER_SUITE_WEP104:
 924                        data_pad = 4;
 925                        break;
 926                case WLAN_CIPHER_SUITE_TKIP:
 927                        data_pad = 12;
 928                        break;
 929                case WLAN_CIPHER_SUITE_CCMP:
 930                        data_pad = 8;
 931                        break;
 932                }
 933        }
 934        mwl8k_add_dma_header(priv, skb, head_pad, data_pad);
 935}
 936
 937/*
 938 * Packet reception for 88w8366/88w8764 AP firmware.
 939 */
 940struct mwl8k_rxd_ap {
 941        __le16 pkt_len;
 942        __u8 sq2;
 943        __u8 rate;
 944        __le32 pkt_phys_addr;
 945        __le32 next_rxd_phys_addr;
 946        __le16 qos_control;
 947        __le16 htsig2;
 948        __le32 hw_rssi_info;
 949        __le32 hw_noise_floor_info;
 950        __u8 noise_floor;
 951        __u8 pad0[3];
 952        __u8 rssi;
 953        __u8 rx_status;
 954        __u8 channel;
 955        __u8 rx_ctrl;
 956} __packed;
 957
 958#define MWL8K_AP_RATE_INFO_MCS_FORMAT           0x80
 959#define MWL8K_AP_RATE_INFO_40MHZ                0x40
 960#define MWL8K_AP_RATE_INFO_RATEID(x)            ((x) & 0x3f)
 961
 962#define MWL8K_AP_RX_CTRL_OWNED_BY_HOST          0x80
 963
 964/* 8366/8764 AP rx_status bits */
 965#define MWL8K_AP_RXSTAT_DECRYPT_ERR_MASK                0x80
 966#define MWL8K_AP_RXSTAT_GENERAL_DECRYPT_ERR             0xFF
 967#define MWL8K_AP_RXSTAT_TKIP_DECRYPT_MIC_ERR            0x02
 968#define MWL8K_AP_RXSTAT_WEP_DECRYPT_ICV_ERR             0x04
 969#define MWL8K_AP_RXSTAT_TKIP_DECRYPT_ICV_ERR            0x08
 970
 971static void mwl8k_rxd_ap_init(void *_rxd, dma_addr_t next_dma_addr)
 972{
 973        struct mwl8k_rxd_ap *rxd = _rxd;
 974
 975        rxd->next_rxd_phys_addr = cpu_to_le32(next_dma_addr);
 976        rxd->rx_ctrl = MWL8K_AP_RX_CTRL_OWNED_BY_HOST;
 977}
 978
 979static void mwl8k_rxd_ap_refill(void *_rxd, dma_addr_t addr, int len)
 980{
 981        struct mwl8k_rxd_ap *rxd = _rxd;
 982
 983        rxd->pkt_len = cpu_to_le16(len);
 984        rxd->pkt_phys_addr = cpu_to_le32(addr);
 985        wmb();
 986        rxd->rx_ctrl = 0;
 987}
 988
 989static int
 990mwl8k_rxd_ap_process(void *_rxd, struct ieee80211_rx_status *status,
 991                     __le16 *qos, s8 *noise)
 992{
 993        struct mwl8k_rxd_ap *rxd = _rxd;
 994
 995        if (!(rxd->rx_ctrl & MWL8K_AP_RX_CTRL_OWNED_BY_HOST))
 996                return -1;
 997        rmb();
 998
 999        memset(status, 0, sizeof(*status));
1000
1001        status->signal = -rxd->rssi;
1002        *noise = -rxd->noise_floor;
1003
1004        if (rxd->rate & MWL8K_AP_RATE_INFO_MCS_FORMAT) {
1005                status->encoding = RX_ENC_HT;
1006                if (rxd->rate & MWL8K_AP_RATE_INFO_40MHZ)
1007                        status->bw = RATE_INFO_BW_40;
1008                status->rate_idx = MWL8K_AP_RATE_INFO_RATEID(rxd->rate);
1009        } else {
1010                int i;
1011
1012                for (i = 0; i < ARRAY_SIZE(mwl8k_rates_24); i++) {
1013                        if (mwl8k_rates_24[i].hw_value == rxd->rate) {
1014                                status->rate_idx = i;
1015                                break;
1016                        }
1017                }
1018        }
1019
1020        if (rxd->channel > 14) {
1021                status->band = NL80211_BAND_5GHZ;
1022                if (!(status->encoding == RX_ENC_HT) &&
1023                    status->rate_idx >= MWL8K_LEGACY_5G_RATE_OFFSET)
1024                        status->rate_idx -= MWL8K_LEGACY_5G_RATE_OFFSET;
1025        } else {
1026                status->band = NL80211_BAND_2GHZ;
1027        }
1028        status->freq = ieee80211_channel_to_frequency(rxd->channel,
1029                                                      status->band);
1030
1031        *qos = rxd->qos_control;
1032
1033        if ((rxd->rx_status != MWL8K_AP_RXSTAT_GENERAL_DECRYPT_ERR) &&
1034            (rxd->rx_status & MWL8K_AP_RXSTAT_DECRYPT_ERR_MASK) &&
1035            (rxd->rx_status & MWL8K_AP_RXSTAT_TKIP_DECRYPT_MIC_ERR))
1036                status->flag |= RX_FLAG_MMIC_ERROR;
1037
1038        return le16_to_cpu(rxd->pkt_len);
1039}
1040
1041static struct rxd_ops rxd_ap_ops = {
1042        .rxd_size       = sizeof(struct mwl8k_rxd_ap),
1043        .rxd_init       = mwl8k_rxd_ap_init,
1044        .rxd_refill     = mwl8k_rxd_ap_refill,
1045        .rxd_process    = mwl8k_rxd_ap_process,
1046};
1047
1048/*
1049 * Packet reception for STA firmware.
1050 */
1051struct mwl8k_rxd_sta {
1052        __le16 pkt_len;
1053        __u8 link_quality;
1054        __u8 noise_level;
1055        __le32 pkt_phys_addr;
1056        __le32 next_rxd_phys_addr;
1057        __le16 qos_control;
1058        __le16 rate_info;
1059        __le32 pad0[4];
1060        __u8 rssi;
1061        __u8 channel;
1062        __le16 pad1;
1063        __u8 rx_ctrl;
1064        __u8 rx_status;
1065        __u8 pad2[2];
1066} __packed;
1067
1068#define MWL8K_STA_RATE_INFO_SHORTPRE            0x8000
1069#define MWL8K_STA_RATE_INFO_ANTSELECT(x)        (((x) >> 11) & 0x3)
1070#define MWL8K_STA_RATE_INFO_RATEID(x)           (((x) >> 3) & 0x3f)
1071#define MWL8K_STA_RATE_INFO_40MHZ               0x0004
1072#define MWL8K_STA_RATE_INFO_SHORTGI             0x0002
1073#define MWL8K_STA_RATE_INFO_MCS_FORMAT          0x0001
1074
1075#define MWL8K_STA_RX_CTRL_OWNED_BY_HOST         0x02
1076#define MWL8K_STA_RX_CTRL_DECRYPT_ERROR         0x04
1077/* ICV=0 or MIC=1 */
1078#define MWL8K_STA_RX_CTRL_DEC_ERR_TYPE          0x08
1079/* Key is uploaded only in failure case */
1080#define MWL8K_STA_RX_CTRL_KEY_INDEX                     0x30
1081
1082static void mwl8k_rxd_sta_init(void *_rxd, dma_addr_t next_dma_addr)
1083{
1084        struct mwl8k_rxd_sta *rxd = _rxd;
1085
1086        rxd->next_rxd_phys_addr = cpu_to_le32(next_dma_addr);
1087        rxd->rx_ctrl = MWL8K_STA_RX_CTRL_OWNED_BY_HOST;
1088}
1089
1090static void mwl8k_rxd_sta_refill(void *_rxd, dma_addr_t addr, int len)
1091{
1092        struct mwl8k_rxd_sta *rxd = _rxd;
1093
1094        rxd->pkt_len = cpu_to_le16(len);
1095        rxd->pkt_phys_addr = cpu_to_le32(addr);
1096        wmb();
1097        rxd->rx_ctrl = 0;
1098}
1099
1100static int
1101mwl8k_rxd_sta_process(void *_rxd, struct ieee80211_rx_status *status,
1102                       __le16 *qos, s8 *noise)
1103{
1104        struct mwl8k_rxd_sta *rxd = _rxd;
1105        u16 rate_info;
1106
1107        if (!(rxd->rx_ctrl & MWL8K_STA_RX_CTRL_OWNED_BY_HOST))
1108                return -1;
1109        rmb();
1110
1111        rate_info = le16_to_cpu(rxd->rate_info);
1112
1113        memset(status, 0, sizeof(*status));
1114
1115        status->signal = -rxd->rssi;
1116        *noise = -rxd->noise_level;
1117        status->antenna = MWL8K_STA_RATE_INFO_ANTSELECT(rate_info);
1118        status->rate_idx = MWL8K_STA_RATE_INFO_RATEID(rate_info);
1119
1120        if (rate_info & MWL8K_STA_RATE_INFO_SHORTPRE)
1121                status->enc_flags |= RX_ENC_FLAG_SHORTPRE;
1122        if (rate_info & MWL8K_STA_RATE_INFO_40MHZ)
1123                status->bw = RATE_INFO_BW_40;
1124        if (rate_info & MWL8K_STA_RATE_INFO_SHORTGI)
1125                status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
1126        if (rate_info & MWL8K_STA_RATE_INFO_MCS_FORMAT)
1127                status->encoding = RX_ENC_HT;
1128
1129        if (rxd->channel > 14) {
1130                status->band = NL80211_BAND_5GHZ;
1131                if (!(status->encoding == RX_ENC_HT) &&
1132                    status->rate_idx >= MWL8K_LEGACY_5G_RATE_OFFSET)
1133                        status->rate_idx -= MWL8K_LEGACY_5G_RATE_OFFSET;
1134        } else {
1135                status->band = NL80211_BAND_2GHZ;
1136        }
1137        status->freq = ieee80211_channel_to_frequency(rxd->channel,
1138                                                      status->band);
1139
1140        *qos = rxd->qos_control;
1141        if ((rxd->rx_ctrl & MWL8K_STA_RX_CTRL_DECRYPT_ERROR) &&
1142            (rxd->rx_ctrl & MWL8K_STA_RX_CTRL_DEC_ERR_TYPE))
1143                status->flag |= RX_FLAG_MMIC_ERROR;
1144
1145        return le16_to_cpu(rxd->pkt_len);
1146}
1147
1148static struct rxd_ops rxd_sta_ops = {
1149        .rxd_size       = sizeof(struct mwl8k_rxd_sta),
1150        .rxd_init       = mwl8k_rxd_sta_init,
1151        .rxd_refill     = mwl8k_rxd_sta_refill,
1152        .rxd_process    = mwl8k_rxd_sta_process,
1153};
1154
1155
1156#define MWL8K_RX_DESCS          256
1157#define MWL8K_RX_MAXSZ          3800
1158
1159static int mwl8k_rxq_init(struct ieee80211_hw *hw, int index)
1160{
1161        struct mwl8k_priv *priv = hw->priv;
1162        struct mwl8k_rx_queue *rxq = priv->rxq + index;
1163        int size;
1164        int i;
1165
1166        rxq->rxd_count = 0;
1167        rxq->head = 0;
1168        rxq->tail = 0;
1169
1170        size = MWL8K_RX_DESCS * priv->rxd_ops->rxd_size;
1171
1172        rxq->rxd = pci_zalloc_consistent(priv->pdev, size, &rxq->rxd_dma);
1173        if (rxq->rxd == NULL) {
1174                wiphy_err(hw->wiphy, "failed to alloc RX descriptors\n");
1175                return -ENOMEM;
1176        }
1177
1178        rxq->buf = kcalloc(MWL8K_RX_DESCS, sizeof(*rxq->buf), GFP_KERNEL);
1179        if (rxq->buf == NULL) {
1180                pci_free_consistent(priv->pdev, size, rxq->rxd, rxq->rxd_dma);
1181                return -ENOMEM;
1182        }
1183
1184        for (i = 0; i < MWL8K_RX_DESCS; i++) {
1185                int desc_size;
1186                void *rxd;
1187                int nexti;
1188                dma_addr_t next_dma_addr;
1189
1190                desc_size = priv->rxd_ops->rxd_size;
1191                rxd = rxq->rxd + (i * priv->rxd_ops->rxd_size);
1192
1193                nexti = i + 1;
1194                if (nexti == MWL8K_RX_DESCS)
1195                        nexti = 0;
1196                next_dma_addr = rxq->rxd_dma + (nexti * desc_size);
1197
1198                priv->rxd_ops->rxd_init(rxd, next_dma_addr);
1199        }
1200
1201        return 0;
1202}
1203
1204static int rxq_refill(struct ieee80211_hw *hw, int index, int limit)
1205{
1206        struct mwl8k_priv *priv = hw->priv;
1207        struct mwl8k_rx_queue *rxq = priv->rxq + index;
1208        int refilled;
1209
1210        refilled = 0;
1211        while (rxq->rxd_count < MWL8K_RX_DESCS && limit--) {
1212                struct sk_buff *skb;
1213                dma_addr_t addr;
1214                int rx;
1215                void *rxd;
1216
1217                skb = dev_alloc_skb(MWL8K_RX_MAXSZ);
1218                if (skb == NULL)
1219                        break;
1220
1221                addr = pci_map_single(priv->pdev, skb->data,
1222                                      MWL8K_RX_MAXSZ, DMA_FROM_DEVICE);
1223
1224                rxq->rxd_count++;
1225                rx = rxq->tail++;
1226                if (rxq->tail == MWL8K_RX_DESCS)
1227                        rxq->tail = 0;
1228                rxq->buf[rx].skb = skb;
1229                dma_unmap_addr_set(&rxq->buf[rx], dma, addr);
1230
1231                rxd = rxq->rxd + (rx * priv->rxd_ops->rxd_size);
1232                priv->rxd_ops->rxd_refill(rxd, addr, MWL8K_RX_MAXSZ);
1233
1234                refilled++;
1235        }
1236
1237        return refilled;
1238}
1239
1240/* Must be called only when the card's reception is completely halted */
1241static void mwl8k_rxq_deinit(struct ieee80211_hw *hw, int index)
1242{
1243        struct mwl8k_priv *priv = hw->priv;
1244        struct mwl8k_rx_queue *rxq = priv->rxq + index;
1245        int i;
1246
1247        if (rxq->rxd == NULL)
1248                return;
1249
1250        for (i = 0; i < MWL8K_RX_DESCS; i++) {
1251                if (rxq->buf[i].skb != NULL) {
1252                        pci_unmap_single(priv->pdev,
1253                                         dma_unmap_addr(&rxq->buf[i], dma),
1254                                         MWL8K_RX_MAXSZ, PCI_DMA_FROMDEVICE);
1255                        dma_unmap_addr_set(&rxq->buf[i], dma, 0);
1256
1257                        kfree_skb(rxq->buf[i].skb);
1258                        rxq->buf[i].skb = NULL;
1259                }
1260        }
1261
1262        kfree(rxq->buf);
1263        rxq->buf = NULL;
1264
1265        pci_free_consistent(priv->pdev,
1266                            MWL8K_RX_DESCS * priv->rxd_ops->rxd_size,
1267                            rxq->rxd, rxq->rxd_dma);
1268        rxq->rxd = NULL;
1269}
1270
1271
1272/*
1273 * Scan a list of BSSIDs to process for finalize join.
1274 * Allows for extension to process multiple BSSIDs.
1275 */
1276static inline int
1277mwl8k_capture_bssid(struct mwl8k_priv *priv, struct ieee80211_hdr *wh)
1278{
1279        return priv->capture_beacon &&
1280                ieee80211_is_beacon(wh->frame_control) &&
1281                ether_addr_equal_64bits(wh->addr3, priv->capture_bssid);
1282}
1283
1284static inline void mwl8k_save_beacon(struct ieee80211_hw *hw,
1285                                     struct sk_buff *skb)
1286{
1287        struct mwl8k_priv *priv = hw->priv;
1288
1289        priv->capture_beacon = false;
1290        eth_zero_addr(priv->capture_bssid);
1291
1292        /*
1293         * Use GFP_ATOMIC as rxq_process is called from
1294         * the primary interrupt handler, memory allocation call
1295         * must not sleep.
1296         */
1297        priv->beacon_skb = skb_copy(skb, GFP_ATOMIC);
1298        if (priv->beacon_skb != NULL)
1299                ieee80211_queue_work(hw, &priv->finalize_join_worker);
1300}
1301
1302static inline struct mwl8k_vif *mwl8k_find_vif_bss(struct list_head *vif_list,
1303                                                   u8 *bssid)
1304{
1305        struct mwl8k_vif *mwl8k_vif;
1306
1307        list_for_each_entry(mwl8k_vif,
1308                            vif_list, list) {
1309                if (memcmp(bssid, mwl8k_vif->bssid,
1310                           ETH_ALEN) == 0)
1311                        return mwl8k_vif;
1312        }
1313
1314        return NULL;
1315}
1316
1317static int rxq_process(struct ieee80211_hw *hw, int index, int limit)
1318{
1319        struct mwl8k_priv *priv = hw->priv;
1320        struct mwl8k_vif *mwl8k_vif = NULL;
1321        struct mwl8k_rx_queue *rxq = priv->rxq + index;
1322        int processed;
1323
1324        processed = 0;
1325        while (rxq->rxd_count && limit--) {
1326                struct sk_buff *skb;
1327                void *rxd;
1328                int pkt_len;
1329                struct ieee80211_rx_status status;
1330                struct ieee80211_hdr *wh;
1331                __le16 qos;
1332
1333                skb = rxq->buf[rxq->head].skb;
1334                if (skb == NULL)
1335                        break;
1336
1337                rxd = rxq->rxd + (rxq->head * priv->rxd_ops->rxd_size);
1338
1339                pkt_len = priv->rxd_ops->rxd_process(rxd, &status, &qos,
1340                                                        &priv->noise);
1341                if (pkt_len < 0)
1342                        break;
1343
1344                rxq->buf[rxq->head].skb = NULL;
1345
1346                pci_unmap_single(priv->pdev,
1347                                 dma_unmap_addr(&rxq->buf[rxq->head], dma),
1348                                 MWL8K_RX_MAXSZ, PCI_DMA_FROMDEVICE);
1349                dma_unmap_addr_set(&rxq->buf[rxq->head], dma, 0);
1350
1351                rxq->head++;
1352                if (rxq->head == MWL8K_RX_DESCS)
1353                        rxq->head = 0;
1354
1355                rxq->rxd_count--;
1356
1357                wh = &((struct mwl8k_dma_data *)skb->data)->wh;
1358
1359                /*
1360                 * Check for a pending join operation.  Save a
1361                 * copy of the beacon and schedule a tasklet to
1362                 * send a FINALIZE_JOIN command to the firmware.
1363                 */
1364                if (mwl8k_capture_bssid(priv, (void *)skb->data))
1365                        mwl8k_save_beacon(hw, skb);
1366
1367                if (ieee80211_has_protected(wh->frame_control)) {
1368
1369                        /* Check if hw crypto has been enabled for
1370                         * this bss. If yes, set the status flags
1371                         * accordingly
1372                         */
1373                        mwl8k_vif = mwl8k_find_vif_bss(&priv->vif_list,
1374                                                                wh->addr1);
1375
1376                        if (mwl8k_vif != NULL &&
1377                            mwl8k_vif->is_hw_crypto_enabled) {
1378                                /*
1379                                 * When MMIC ERROR is encountered
1380                                 * by the firmware, payload is
1381                                 * dropped and only 32 bytes of
1382                                 * mwl8k Firmware header is sent
1383                                 * to the host.
1384                                 *
1385                                 * We need to add four bytes of
1386                                 * key information.  In it
1387                                 * MAC80211 expects keyidx set to
1388                                 * 0 for triggering Counter
1389                                 * Measure of MMIC failure.
1390                                 */
1391                                if (status.flag & RX_FLAG_MMIC_ERROR) {
1392                                        struct mwl8k_dma_data *tr;
1393                                        tr = (struct mwl8k_dma_data *)skb->data;
1394                                        memset((void *)&(tr->data), 0, 4);
1395                                        pkt_len += 4;
1396                                }
1397
1398                                if (!ieee80211_is_auth(wh->frame_control))
1399                                        status.flag |= RX_FLAG_IV_STRIPPED |
1400                                                       RX_FLAG_DECRYPTED |
1401                                                       RX_FLAG_MMIC_STRIPPED;
1402                        }
1403                }
1404
1405                skb_put(skb, pkt_len);
1406                mwl8k_remove_dma_header(skb, qos);
1407                memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
1408                ieee80211_rx_irqsafe(hw, skb);
1409
1410                processed++;
1411        }
1412
1413        return processed;
1414}
1415
1416
1417/*
1418 * Packet transmission.
1419 */
1420
1421#define MWL8K_TXD_STATUS_OK                     0x00000001
1422#define MWL8K_TXD_STATUS_OK_RETRY               0x00000002
1423#define MWL8K_TXD_STATUS_OK_MORE_RETRY          0x00000004
1424#define MWL8K_TXD_STATUS_MULTICAST_TX           0x00000008
1425#define MWL8K_TXD_STATUS_FW_OWNED               0x80000000
1426
1427#define MWL8K_QOS_QLEN_UNSPEC                   0xff00
1428#define MWL8K_QOS_ACK_POLICY_MASK               0x0060
1429#define MWL8K_QOS_ACK_POLICY_NORMAL             0x0000
1430#define MWL8K_QOS_ACK_POLICY_BLOCKACK           0x0060
1431#define MWL8K_QOS_EOSP                          0x0010
1432
1433struct mwl8k_tx_desc {
1434        __le32 status;
1435        __u8 data_rate;
1436        __u8 tx_priority;
1437        __le16 qos_control;
1438        __le32 pkt_phys_addr;
1439        __le16 pkt_len;
1440        __u8 dest_MAC_addr[ETH_ALEN];
1441        __le32 next_txd_phys_addr;
1442        __le32 timestamp;
1443        __le16 rate_info;
1444        __u8 peer_id;
1445        __u8 tx_frag_cnt;
1446} __packed;
1447
1448#define MWL8K_TX_DESCS          128
1449
1450static int mwl8k_txq_init(struct ieee80211_hw *hw, int index)
1451{
1452        struct mwl8k_priv *priv = hw->priv;
1453        struct mwl8k_tx_queue *txq = priv->txq + index;
1454        int size;
1455        int i;
1456
1457        txq->len = 0;
1458        txq->head = 0;
1459        txq->tail = 0;
1460
1461        size = MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc);
1462
1463        txq->txd = pci_zalloc_consistent(priv->pdev, size, &txq->txd_dma);
1464        if (txq->txd == NULL) {
1465                wiphy_err(hw->wiphy, "failed to alloc TX descriptors\n");
1466                return -ENOMEM;
1467        }
1468
1469        txq->skb = kcalloc(MWL8K_TX_DESCS, sizeof(*txq->skb), GFP_KERNEL);
1470        if (txq->skb == NULL) {
1471                pci_free_consistent(priv->pdev, size, txq->txd, txq->txd_dma);
1472                return -ENOMEM;
1473        }
1474
1475        for (i = 0; i < MWL8K_TX_DESCS; i++) {
1476                struct mwl8k_tx_desc *tx_desc;
1477                int nexti;
1478
1479                tx_desc = txq->txd + i;
1480                nexti = (i + 1) % MWL8K_TX_DESCS;
1481
1482                tx_desc->status = 0;
1483                tx_desc->next_txd_phys_addr =
1484                        cpu_to_le32(txq->txd_dma + nexti * sizeof(*tx_desc));
1485        }
1486
1487        return 0;
1488}
1489
1490static inline void mwl8k_tx_start(struct mwl8k_priv *priv)
1491{
1492        iowrite32(MWL8K_H2A_INT_PPA_READY,
1493                priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
1494        iowrite32(MWL8K_H2A_INT_DUMMY,
1495                priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
1496        ioread32(priv->regs + MWL8K_HIU_INT_CODE);
1497}
1498
1499static void mwl8k_dump_tx_rings(struct ieee80211_hw *hw)
1500{
1501        struct mwl8k_priv *priv = hw->priv;
1502        int i;
1503
1504        for (i = 0; i < mwl8k_tx_queues(priv); i++) {
1505                struct mwl8k_tx_queue *txq = priv->txq + i;
1506                int fw_owned = 0;
1507                int drv_owned = 0;
1508                int unused = 0;
1509                int desc;
1510
1511                for (desc = 0; desc < MWL8K_TX_DESCS; desc++) {
1512                        struct mwl8k_tx_desc *tx_desc = txq->txd + desc;
1513                        u32 status;
1514
1515                        status = le32_to_cpu(tx_desc->status);
1516                        if (status & MWL8K_TXD_STATUS_FW_OWNED)
1517                                fw_owned++;
1518                        else
1519                                drv_owned++;
1520
1521                        if (tx_desc->pkt_len == 0)
1522                                unused++;
1523                }
1524
1525                wiphy_err(hw->wiphy,
1526                          "txq[%d] len=%d head=%d tail=%d "
1527                          "fw_owned=%d drv_owned=%d unused=%d\n",
1528                          i,
1529                          txq->len, txq->head, txq->tail,
1530                          fw_owned, drv_owned, unused);
1531        }
1532}
1533
1534/*
1535 * Must be called with priv->fw_mutex held and tx queues stopped.
1536 */
1537#define MWL8K_TX_WAIT_TIMEOUT_MS        5000
1538
1539static int mwl8k_tx_wait_empty(struct ieee80211_hw *hw)
1540{
1541        struct mwl8k_priv *priv = hw->priv;
1542        DECLARE_COMPLETION_ONSTACK(tx_wait);
1543        int retry;
1544        int rc;
1545
1546        might_sleep();
1547
1548        /* Since fw restart is in progress, allow only the firmware
1549         * commands from the restart code and block the other
1550         * commands since they are going to fail in any case since
1551         * the firmware has crashed
1552         */
1553        if (priv->hw_restart_in_progress) {
1554                if (priv->hw_restart_owner == current)
1555                        return 0;
1556                else
1557                        return -EBUSY;
1558        }
1559
1560        if (atomic_read(&priv->watchdog_event_pending))
1561                return 0;
1562
1563        /*
1564         * The TX queues are stopped at this point, so this test
1565         * doesn't need to take ->tx_lock.
1566         */
1567        if (!priv->pending_tx_pkts)
1568                return 0;
1569
1570        retry = 1;
1571        rc = 0;
1572
1573        spin_lock_bh(&priv->tx_lock);
1574        priv->tx_wait = &tx_wait;
1575        while (!rc) {
1576                int oldcount;
1577                unsigned long timeout;
1578
1579                oldcount = priv->pending_tx_pkts;
1580
1581                spin_unlock_bh(&priv->tx_lock);
1582                timeout = wait_for_completion_timeout(&tx_wait,
1583                            msecs_to_jiffies(MWL8K_TX_WAIT_TIMEOUT_MS));
1584
1585                if (atomic_read(&priv->watchdog_event_pending)) {
1586                        spin_lock_bh(&priv->tx_lock);
1587                        priv->tx_wait = NULL;
1588                        spin_unlock_bh(&priv->tx_lock);
1589                        return 0;
1590                }
1591
1592                spin_lock_bh(&priv->tx_lock);
1593
1594                if (timeout || !priv->pending_tx_pkts) {
1595                        WARN_ON(priv->pending_tx_pkts);
1596                        if (retry)
1597                                wiphy_notice(hw->wiphy, "tx rings drained\n");
1598                        break;
1599                }
1600
1601                if (retry) {
1602                        mwl8k_tx_start(priv);
1603                        retry = 0;
1604                        continue;
1605                }
1606
1607                if (priv->pending_tx_pkts < oldcount) {
1608                        wiphy_notice(hw->wiphy,
1609                                     "waiting for tx rings to drain (%d -> %d pkts)\n",
1610                                     oldcount, priv->pending_tx_pkts);
1611                        retry = 1;
1612                        continue;
1613                }
1614
1615                priv->tx_wait = NULL;
1616
1617                wiphy_err(hw->wiphy, "tx rings stuck for %d ms\n",
1618                          MWL8K_TX_WAIT_TIMEOUT_MS);
1619                mwl8k_dump_tx_rings(hw);
1620                priv->hw_restart_in_progress = true;
1621                ieee80211_queue_work(hw, &priv->fw_reload);
1622
1623                rc = -ETIMEDOUT;
1624        }
1625        priv->tx_wait = NULL;
1626        spin_unlock_bh(&priv->tx_lock);
1627
1628        return rc;
1629}
1630
1631#define MWL8K_TXD_SUCCESS(status)                               \
1632        ((status) & (MWL8K_TXD_STATUS_OK |                      \
1633                     MWL8K_TXD_STATUS_OK_RETRY |                \
1634                     MWL8K_TXD_STATUS_OK_MORE_RETRY))
1635
1636static int mwl8k_tid_queue_mapping(u8 tid)
1637{
1638        BUG_ON(tid > 7);
1639
1640        switch (tid) {
1641        case 0:
1642        case 3:
1643                return IEEE80211_AC_BE;
1644        case 1:
1645        case 2:
1646                return IEEE80211_AC_BK;
1647        case 4:
1648        case 5:
1649                return IEEE80211_AC_VI;
1650        case 6:
1651        case 7:
1652                return IEEE80211_AC_VO;
1653        default:
1654                return -1;
1655        }
1656}
1657
1658/* The firmware will fill in the rate information
1659 * for each packet that gets queued in the hardware
1660 * and these macros will interpret that info.
1661 */
1662
1663#define RI_FORMAT(a)              (a & 0x0001)
1664#define RI_RATE_ID_MCS(a)        ((a & 0x01f8) >> 3)
1665
1666static int
1667mwl8k_txq_reclaim(struct ieee80211_hw *hw, int index, int limit, int force)
1668{
1669        struct mwl8k_priv *priv = hw->priv;
1670        struct mwl8k_tx_queue *txq = priv->txq + index;
1671        int processed;
1672
1673        processed = 0;
1674        while (txq->len > 0 && limit--) {
1675                int tx;
1676                struct mwl8k_tx_desc *tx_desc;
1677                unsigned long addr;
1678                int size;
1679                struct sk_buff *skb;
1680                struct ieee80211_tx_info *info;
1681                u32 status;
1682                struct ieee80211_sta *sta;
1683                struct mwl8k_sta *sta_info = NULL;
1684                u16 rate_info;
1685                struct ieee80211_hdr *wh;
1686
1687                tx = txq->head;
1688                tx_desc = txq->txd + tx;
1689
1690                status = le32_to_cpu(tx_desc->status);
1691
1692                if (status & MWL8K_TXD_STATUS_FW_OWNED) {
1693                        if (!force)
1694                                break;
1695                        tx_desc->status &=
1696                                ~cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED);
1697                }
1698
1699                txq->head = (tx + 1) % MWL8K_TX_DESCS;
1700                BUG_ON(txq->len == 0);
1701                txq->len--;
1702                priv->pending_tx_pkts--;
1703
1704                addr = le32_to_cpu(tx_desc->pkt_phys_addr);
1705                size = le16_to_cpu(tx_desc->pkt_len);
1706                skb = txq->skb[tx];
1707                txq->skb[tx] = NULL;
1708
1709                BUG_ON(skb == NULL);
1710                pci_unmap_single(priv->pdev, addr, size, PCI_DMA_TODEVICE);
1711
1712                mwl8k_remove_dma_header(skb, tx_desc->qos_control);
1713
1714                wh = (struct ieee80211_hdr *) skb->data;
1715
1716                /* Mark descriptor as unused */
1717                tx_desc->pkt_phys_addr = 0;
1718                tx_desc->pkt_len = 0;
1719
1720                info = IEEE80211_SKB_CB(skb);
1721                if (ieee80211_is_data(wh->frame_control)) {
1722                        rcu_read_lock();
1723                        sta = ieee80211_find_sta_by_ifaddr(hw, wh->addr1,
1724                                                           wh->addr2);
1725                        if (sta) {
1726                                sta_info = MWL8K_STA(sta);
1727                                BUG_ON(sta_info == NULL);
1728                                rate_info = le16_to_cpu(tx_desc->rate_info);
1729                                /* If rate is < 6.5 Mpbs for an ht station
1730                                 * do not form an ampdu. If the station is a
1731                                 * legacy station (format = 0), do not form an
1732                                 * ampdu
1733                                 */
1734                                if (RI_RATE_ID_MCS(rate_info) < 1 ||
1735                                    RI_FORMAT(rate_info) == 0) {
1736                                        sta_info->is_ampdu_allowed = false;
1737                                } else {
1738                                        sta_info->is_ampdu_allowed = true;
1739                                }
1740                        }
1741                        rcu_read_unlock();
1742                }
1743
1744                ieee80211_tx_info_clear_status(info);
1745
1746                /* Rate control is happening in the firmware.
1747                 * Ensure no tx rate is being reported.
1748                 */
1749                info->status.rates[0].idx = -1;
1750                info->status.rates[0].count = 1;
1751
1752                if (MWL8K_TXD_SUCCESS(status))
1753                        info->flags |= IEEE80211_TX_STAT_ACK;
1754
1755                ieee80211_tx_status_irqsafe(hw, skb);
1756
1757                processed++;
1758        }
1759
1760        return processed;
1761}
1762
1763/* must be called only when the card's transmit is completely halted */
1764static void mwl8k_txq_deinit(struct ieee80211_hw *hw, int index)
1765{
1766        struct mwl8k_priv *priv = hw->priv;
1767        struct mwl8k_tx_queue *txq = priv->txq + index;
1768
1769        if (txq->txd == NULL)
1770                return;
1771
1772        mwl8k_txq_reclaim(hw, index, INT_MAX, 1);
1773
1774        kfree(txq->skb);
1775        txq->skb = NULL;
1776
1777        pci_free_consistent(priv->pdev,
1778                            MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc),
1779                            txq->txd, txq->txd_dma);
1780        txq->txd = NULL;
1781}
1782
1783/* caller must hold priv->stream_lock when calling the stream functions */
1784static struct mwl8k_ampdu_stream *
1785mwl8k_add_stream(struct ieee80211_hw *hw, struct ieee80211_sta *sta, u8 tid)
1786{
1787        struct mwl8k_ampdu_stream *stream;
1788        struct mwl8k_priv *priv = hw->priv;
1789        int i;
1790
1791        for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
1792                stream = &priv->ampdu[i];
1793                if (stream->state == AMPDU_NO_STREAM) {
1794                        stream->sta = sta;
1795                        stream->state = AMPDU_STREAM_NEW;
1796                        stream->tid = tid;
1797                        stream->idx = i;
1798                        wiphy_debug(hw->wiphy, "Added a new stream for %pM %d",
1799                                    sta->addr, tid);
1800                        return stream;
1801                }
1802        }
1803        return NULL;
1804}
1805
1806static int
1807mwl8k_start_stream(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream)
1808{
1809        int ret;
1810
1811        /* if the stream has already been started, don't start it again */
1812        if (stream->state != AMPDU_STREAM_NEW)
1813                return 0;
1814        ret = ieee80211_start_tx_ba_session(stream->sta, stream->tid, 0);
1815        if (ret)
1816                wiphy_debug(hw->wiphy, "Failed to start stream for %pM %d: "
1817                            "%d\n", stream->sta->addr, stream->tid, ret);
1818        else
1819                wiphy_debug(hw->wiphy, "Started stream for %pM %d\n",
1820                            stream->sta->addr, stream->tid);
1821        return ret;
1822}
1823
1824static void
1825mwl8k_remove_stream(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream)
1826{
1827        wiphy_debug(hw->wiphy, "Remove stream for %pM %d\n", stream->sta->addr,
1828                    stream->tid);
1829        memset(stream, 0, sizeof(*stream));
1830}
1831
1832static struct mwl8k_ampdu_stream *
1833mwl8k_lookup_stream(struct ieee80211_hw *hw, u8 *addr, u8 tid)
1834{
1835        struct mwl8k_priv *priv = hw->priv;
1836        int i;
1837
1838        for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
1839                struct mwl8k_ampdu_stream *stream;
1840                stream = &priv->ampdu[i];
1841                if (stream->state == AMPDU_NO_STREAM)
1842                        continue;
1843                if (!memcmp(stream->sta->addr, addr, ETH_ALEN) &&
1844                    stream->tid == tid)
1845                        return stream;
1846        }
1847        return NULL;
1848}
1849
1850#define MWL8K_AMPDU_PACKET_THRESHOLD 64
1851static inline bool mwl8k_ampdu_allowed(struct ieee80211_sta *sta, u8 tid)
1852{
1853        struct mwl8k_sta *sta_info = MWL8K_STA(sta);
1854        struct tx_traffic_info *tx_stats;
1855
1856        BUG_ON(tid >= MWL8K_MAX_TID);
1857        tx_stats = &sta_info->tx_stats[tid];
1858
1859        return sta_info->is_ampdu_allowed &&
1860                tx_stats->pkts > MWL8K_AMPDU_PACKET_THRESHOLD;
1861}
1862
1863static inline void mwl8k_tx_count_packet(struct ieee80211_sta *sta, u8 tid)
1864{
1865        struct mwl8k_sta *sta_info = MWL8K_STA(sta);
1866        struct tx_traffic_info *tx_stats;
1867
1868        BUG_ON(tid >= MWL8K_MAX_TID);
1869        tx_stats = &sta_info->tx_stats[tid];
1870
1871        if (tx_stats->start_time == 0)
1872                tx_stats->start_time = jiffies;
1873
1874        /* reset the packet count after each second elapses.  If the number of
1875         * packets ever exceeds the ampdu_min_traffic threshold, we will allow
1876         * an ampdu stream to be started.
1877         */
1878        if (jiffies - tx_stats->start_time > HZ) {
1879                tx_stats->pkts = 0;
1880                tx_stats->start_time = 0;
1881        } else
1882                tx_stats->pkts++;
1883}
1884
1885/* The hardware ampdu queues start from 5.
1886 * txpriorities for ampdu queues are
1887 * 5 6 7 0 1 2 3 4 ie., queue 5 is highest
1888 * and queue 3 is lowest (queue 4 is reserved)
1889 */
1890#define BA_QUEUE                5
1891
1892static void
1893mwl8k_txq_xmit(struct ieee80211_hw *hw,
1894               int index,
1895               struct ieee80211_sta *sta,
1896               struct sk_buff *skb)
1897{
1898        struct mwl8k_priv *priv = hw->priv;
1899        struct ieee80211_tx_info *tx_info;
1900        struct mwl8k_vif *mwl8k_vif;
1901        struct ieee80211_hdr *wh;
1902        struct mwl8k_tx_queue *txq;
1903        struct mwl8k_tx_desc *tx;
1904        dma_addr_t dma;
1905        u32 txstatus;
1906        u8 txdatarate;
1907        u16 qos;
1908        int txpriority;
1909        u8 tid = 0;
1910        struct mwl8k_ampdu_stream *stream = NULL;
1911        bool start_ba_session = false;
1912        bool mgmtframe = false;
1913        struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
1914        bool eapol_frame = false;
1915
1916        wh = (struct ieee80211_hdr *)skb->data;
1917        if (ieee80211_is_data_qos(wh->frame_control))
1918                qos = le16_to_cpu(*((__le16 *)ieee80211_get_qos_ctl(wh)));
1919        else
1920                qos = 0;
1921
1922        if (skb->protocol == cpu_to_be16(ETH_P_PAE))
1923                eapol_frame = true;
1924
1925        if (ieee80211_is_mgmt(wh->frame_control))
1926                mgmtframe = true;
1927
1928        if (priv->ap_fw)
1929                mwl8k_encapsulate_tx_frame(priv, skb);
1930        else
1931                mwl8k_add_dma_header(priv, skb, 0, 0);
1932
1933        wh = &((struct mwl8k_dma_data *)skb->data)->wh;
1934
1935        tx_info = IEEE80211_SKB_CB(skb);
1936        mwl8k_vif = MWL8K_VIF(tx_info->control.vif);
1937
1938        if (tx_info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
1939                wh->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1940                wh->seq_ctrl |= cpu_to_le16(mwl8k_vif->seqno);
1941                mwl8k_vif->seqno += 0x10;
1942        }
1943
1944        /* Setup firmware control bit fields for each frame type.  */
1945        txstatus = 0;
1946        txdatarate = 0;
1947        if (ieee80211_is_mgmt(wh->frame_control) ||
1948            ieee80211_is_ctl(wh->frame_control)) {
1949                txdatarate = 0;
1950                qos |= MWL8K_QOS_QLEN_UNSPEC | MWL8K_QOS_EOSP;
1951        } else if (ieee80211_is_data(wh->frame_control)) {
1952                txdatarate = 1;
1953                if (is_multicast_ether_addr(wh->addr1))
1954                        txstatus |= MWL8K_TXD_STATUS_MULTICAST_TX;
1955
1956                qos &= ~MWL8K_QOS_ACK_POLICY_MASK;
1957                if (tx_info->flags & IEEE80211_TX_CTL_AMPDU)
1958                        qos |= MWL8K_QOS_ACK_POLICY_BLOCKACK;
1959                else
1960                        qos |= MWL8K_QOS_ACK_POLICY_NORMAL;
1961        }
1962
1963        /* Queue ADDBA request in the respective data queue.  While setting up
1964         * the ampdu stream, mac80211 queues further packets for that
1965         * particular ra/tid pair.  However, packets piled up in the hardware
1966         * for that ra/tid pair will still go out. ADDBA request and the
1967         * related data packets going out from different queues asynchronously
1968         * will cause a shift in the receiver window which might result in
1969         * ampdu packets getting dropped at the receiver after the stream has
1970         * been setup.
1971         */
1972        if (unlikely(ieee80211_is_action(wh->frame_control) &&
1973            mgmt->u.action.category == WLAN_CATEGORY_BACK &&
1974            mgmt->u.action.u.addba_req.action_code == WLAN_ACTION_ADDBA_REQ &&
1975            priv->ap_fw)) {
1976                u16 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1977                tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1978                index = mwl8k_tid_queue_mapping(tid);
1979        }
1980
1981        txpriority = index;
1982
1983        if (priv->ap_fw && sta && sta->ht_cap.ht_supported && !eapol_frame &&
1984            ieee80211_is_data_qos(wh->frame_control)) {
1985                tid = qos & 0xf;
1986                mwl8k_tx_count_packet(sta, tid);
1987                spin_lock(&priv->stream_lock);
1988                stream = mwl8k_lookup_stream(hw, sta->addr, tid);
1989                if (stream != NULL) {
1990                        if (stream->state == AMPDU_STREAM_ACTIVE) {
1991                                WARN_ON(!(qos & MWL8K_QOS_ACK_POLICY_BLOCKACK));
1992                                txpriority = (BA_QUEUE + stream->idx) %
1993                                             TOTAL_HW_TX_QUEUES;
1994                                if (stream->idx <= 1)
1995                                        index = stream->idx +
1996                                                MWL8K_TX_WMM_QUEUES;
1997
1998                        } else if (stream->state == AMPDU_STREAM_NEW) {
1999                                /* We get here if the driver sends us packets
2000                                 * after we've initiated a stream, but before
2001                                 * our ampdu_action routine has been called
2002                                 * with IEEE80211_AMPDU_TX_START to get the SSN
2003                                 * for the ADDBA request.  So this packet can
2004                                 * go out with no risk of sequence number
2005                                 * mismatch.  No special handling is required.
2006                                 */
2007                        } else {
2008                                /* Drop packets that would go out after the
2009                                 * ADDBA request was sent but before the ADDBA
2010                                 * response is received.  If we don't do this,
2011                                 * the recipient would probably receive it
2012                                 * after the ADDBA request with SSN 0.  This
2013                                 * will cause the recipient's BA receive window
2014                                 * to shift, which would cause the subsequent
2015                                 * packets in the BA stream to be discarded.
2016                                 * mac80211 queues our packets for us in this
2017                                 * case, so this is really just a safety check.
2018                                 */
2019                                wiphy_warn(hw->wiphy,
2020                                           "Cannot send packet while ADDBA "
2021                                           "dialog is underway.\n");
2022                                spin_unlock(&priv->stream_lock);
2023                                dev_kfree_skb(skb);
2024                                return;
2025                        }
2026                } else {
2027                        /* Defer calling mwl8k_start_stream so that the current
2028                         * skb can go out before the ADDBA request.  This
2029                         * prevents sequence number mismatch at the recepient
2030                         * as described above.
2031                         */
2032                        if (mwl8k_ampdu_allowed(sta, tid)) {
2033                                stream = mwl8k_add_stream(hw, sta, tid);
2034                                if (stream != NULL)
2035                                        start_ba_session = true;
2036                        }
2037                }
2038                spin_unlock(&priv->stream_lock);
2039        } else {
2040                qos &= ~MWL8K_QOS_ACK_POLICY_MASK;
2041                qos |= MWL8K_QOS_ACK_POLICY_NORMAL;
2042        }
2043
2044        dma = pci_map_single(priv->pdev, skb->data,
2045                                skb->len, PCI_DMA_TODEVICE);
2046
2047        if (pci_dma_mapping_error(priv->pdev, dma)) {
2048                wiphy_debug(hw->wiphy,
2049                            "failed to dma map skb, dropping TX frame.\n");
2050                if (start_ba_session) {
2051                        spin_lock(&priv->stream_lock);
2052                        mwl8k_remove_stream(hw, stream);
2053                        spin_unlock(&priv->stream_lock);
2054                }
2055                dev_kfree_skb(skb);
2056                return;
2057        }
2058
2059        spin_lock_bh(&priv->tx_lock);
2060
2061        txq = priv->txq + index;
2062
2063        /* Mgmt frames that go out frequently are probe
2064         * responses. Other mgmt frames got out relatively
2065         * infrequently. Hence reserve 2 buffers so that
2066         * other mgmt frames do not get dropped due to an
2067         * already queued probe response in one of the
2068         * reserved buffers.
2069         */
2070
2071        if (txq->len >= MWL8K_TX_DESCS - 2) {
2072                if (!mgmtframe || txq->len == MWL8K_TX_DESCS) {
2073                        if (start_ba_session) {
2074                                spin_lock(&priv->stream_lock);
2075                                mwl8k_remove_stream(hw, stream);
2076                                spin_unlock(&priv->stream_lock);
2077                        }
2078                        mwl8k_tx_start(priv);
2079                        spin_unlock_bh(&priv->tx_lock);
2080                        pci_unmap_single(priv->pdev, dma, skb->len,
2081                                         PCI_DMA_TODEVICE);
2082                        dev_kfree_skb(skb);
2083                        return;
2084                }
2085        }
2086
2087        BUG_ON(txq->skb[txq->tail] != NULL);
2088        txq->skb[txq->tail] = skb;
2089
2090        tx = txq->txd + txq->tail;
2091        tx->data_rate = txdatarate;
2092        tx->tx_priority = txpriority;
2093        tx->qos_control = cpu_to_le16(qos);
2094        tx->pkt_phys_addr = cpu_to_le32(dma);
2095        tx->pkt_len = cpu_to_le16(skb->len);
2096        tx->rate_info = 0;
2097        if (!priv->ap_fw && sta != NULL)
2098                tx->peer_id = MWL8K_STA(sta)->peer_id;
2099        else
2100                tx->peer_id = 0;
2101
2102        if (priv->ap_fw && ieee80211_is_data(wh->frame_control) && !eapol_frame)
2103                tx->timestamp = cpu_to_le32(ioread32(priv->regs +
2104                                                MWL8K_HW_TIMER_REGISTER));
2105        else
2106                tx->timestamp = 0;
2107
2108        wmb();
2109        tx->status = cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED | txstatus);
2110
2111        txq->len++;
2112        priv->pending_tx_pkts++;
2113
2114        txq->tail++;
2115        if (txq->tail == MWL8K_TX_DESCS)
2116                txq->tail = 0;
2117
2118        mwl8k_tx_start(priv);
2119
2120        spin_unlock_bh(&priv->tx_lock);
2121
2122        /* Initiate the ampdu session here */
2123        if (start_ba_session) {
2124                spin_lock(&priv->stream_lock);
2125                if (mwl8k_start_stream(hw, stream))
2126                        mwl8k_remove_stream(hw, stream);
2127                spin_unlock(&priv->stream_lock);
2128        }
2129}
2130
2131
2132/*
2133 * Firmware access.
2134 *
2135 * We have the following requirements for issuing firmware commands:
2136 * - Some commands require that the packet transmit path is idle when
2137 *   the command is issued.  (For simplicity, we'll just quiesce the
2138 *   transmit path for every command.)
2139 * - There are certain sequences of commands that need to be issued to
2140 *   the hardware sequentially, with no other intervening commands.
2141 *
2142 * This leads to an implementation of a "firmware lock" as a mutex that
2143 * can be taken recursively, and which is taken by both the low-level
2144 * command submission function (mwl8k_post_cmd) as well as any users of
2145 * that function that require issuing of an atomic sequence of commands,
2146 * and quiesces the transmit path whenever it's taken.
2147 */
2148static int mwl8k_fw_lock(struct ieee80211_hw *hw)
2149{
2150        struct mwl8k_priv *priv = hw->priv;
2151
2152        if (priv->fw_mutex_owner != current) {
2153                int rc;
2154
2155                mutex_lock(&priv->fw_mutex);
2156                ieee80211_stop_queues(hw);
2157
2158                rc = mwl8k_tx_wait_empty(hw);
2159                if (rc) {
2160                        if (!priv->hw_restart_in_progress)
2161                                ieee80211_wake_queues(hw);
2162
2163                        mutex_unlock(&priv->fw_mutex);
2164
2165                        return rc;
2166                }
2167
2168                priv->fw_mutex_owner = current;
2169        }
2170
2171        priv->fw_mutex_depth++;
2172
2173        return 0;
2174}
2175
2176static void mwl8k_fw_unlock(struct ieee80211_hw *hw)
2177{
2178        struct mwl8k_priv *priv = hw->priv;
2179
2180        if (!--priv->fw_mutex_depth) {
2181                if (!priv->hw_restart_in_progress)
2182                        ieee80211_wake_queues(hw);
2183
2184                priv->fw_mutex_owner = NULL;
2185                mutex_unlock(&priv->fw_mutex);
2186        }
2187}
2188
2189static void mwl8k_enable_bsses(struct ieee80211_hw *hw, bool enable,
2190                               u32 bitmap);
2191
2192/*
2193 * Command processing.
2194 */
2195
2196/* Timeout firmware commands after 10s */
2197#define MWL8K_CMD_TIMEOUT_MS    10000
2198
2199static int mwl8k_post_cmd(struct ieee80211_hw *hw, struct mwl8k_cmd_pkt *cmd)
2200{
2201        DECLARE_COMPLETION_ONSTACK(cmd_wait);
2202        struct mwl8k_priv *priv = hw->priv;
2203        void __iomem *regs = priv->regs;
2204        dma_addr_t dma_addr;
2205        unsigned int dma_size;
2206        int rc;
2207        unsigned long timeout = 0;
2208        u8 buf[32];
2209        u32 bitmap = 0;
2210
2211        wiphy_dbg(hw->wiphy, "Posting %s [%d]\n",
2212                  mwl8k_cmd_name(cmd->code, buf, sizeof(buf)), cmd->macid);
2213
2214        /* Before posting firmware commands that could change the hardware
2215         * characteristics, make sure that all BSSes are stopped temporary.
2216         * Enable these stopped BSSes after completion of the commands
2217         */
2218
2219        rc = mwl8k_fw_lock(hw);
2220        if (rc)
2221                return rc;
2222
2223        if (priv->ap_fw && priv->running_bsses) {
2224                switch (le16_to_cpu(cmd->code)) {
2225                case MWL8K_CMD_SET_RF_CHANNEL:
2226                case MWL8K_CMD_RADIO_CONTROL:
2227                case MWL8K_CMD_RF_TX_POWER:
2228                case MWL8K_CMD_TX_POWER:
2229                case MWL8K_CMD_RF_ANTENNA:
2230                case MWL8K_CMD_RTS_THRESHOLD:
2231                case MWL8K_CMD_MIMO_CONFIG:
2232                        bitmap = priv->running_bsses;
2233                        mwl8k_enable_bsses(hw, false, bitmap);
2234                        break;
2235                }
2236        }
2237
2238        cmd->result = (__force __le16) 0xffff;
2239        dma_size = le16_to_cpu(cmd->length);
2240        dma_addr = pci_map_single(priv->pdev, cmd, dma_size,
2241                                  PCI_DMA_BIDIRECTIONAL);
2242        if (pci_dma_mapping_error(priv->pdev, dma_addr)) {
2243                rc = -ENOMEM;
2244                goto exit;
2245        }
2246
2247        priv->hostcmd_wait = &cmd_wait;
2248        iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR);
2249        iowrite32(MWL8K_H2A_INT_DOORBELL,
2250                regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
2251        iowrite32(MWL8K_H2A_INT_DUMMY,
2252                regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
2253
2254        timeout = wait_for_completion_timeout(&cmd_wait,
2255                                msecs_to_jiffies(MWL8K_CMD_TIMEOUT_MS));
2256
2257        priv->hostcmd_wait = NULL;
2258
2259
2260        pci_unmap_single(priv->pdev, dma_addr, dma_size,
2261                                        PCI_DMA_BIDIRECTIONAL);
2262
2263        if (!timeout) {
2264                wiphy_err(hw->wiphy, "Command %s timeout after %u ms\n",
2265                          mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
2266                          MWL8K_CMD_TIMEOUT_MS);
2267                rc = -ETIMEDOUT;
2268        } else {
2269                int ms;
2270
2271                ms = MWL8K_CMD_TIMEOUT_MS - jiffies_to_msecs(timeout);
2272
2273                rc = cmd->result ? -EINVAL : 0;
2274                if (rc)
2275                        wiphy_err(hw->wiphy, "Command %s error 0x%x\n",
2276                                  mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
2277                                  le16_to_cpu(cmd->result));
2278                else if (ms > 2000)
2279                        wiphy_notice(hw->wiphy, "Command %s took %d ms\n",
2280                                     mwl8k_cmd_name(cmd->code,
2281                                                    buf, sizeof(buf)),
2282                                     ms);
2283        }
2284
2285exit:
2286        if (bitmap)
2287                mwl8k_enable_bsses(hw, true, bitmap);
2288
2289        mwl8k_fw_unlock(hw);
2290
2291        return rc;
2292}
2293
2294static int mwl8k_post_pervif_cmd(struct ieee80211_hw *hw,
2295                                 struct ieee80211_vif *vif,
2296                                 struct mwl8k_cmd_pkt *cmd)
2297{
2298        if (vif != NULL)
2299                cmd->macid = MWL8K_VIF(vif)->macid;
2300        return mwl8k_post_cmd(hw, cmd);
2301}
2302
2303/*
2304 * Setup code shared between STA and AP firmware images.
2305 */
2306static void mwl8k_setup_2ghz_band(struct ieee80211_hw *hw)
2307{
2308        struct mwl8k_priv *priv = hw->priv;
2309
2310        BUILD_BUG_ON(sizeof(priv->channels_24) != sizeof(mwl8k_channels_24));
2311        memcpy(priv->channels_24, mwl8k_channels_24, sizeof(mwl8k_channels_24));
2312
2313        BUILD_BUG_ON(sizeof(priv->rates_24) != sizeof(mwl8k_rates_24));
2314        memcpy(priv->rates_24, mwl8k_rates_24, sizeof(mwl8k_rates_24));
2315
2316        priv->band_24.band = NL80211_BAND_2GHZ;
2317        priv->band_24.channels = priv->channels_24;
2318        priv->band_24.n_channels = ARRAY_SIZE(mwl8k_channels_24);
2319        priv->band_24.bitrates = priv->rates_24;
2320        priv->band_24.n_bitrates = ARRAY_SIZE(mwl8k_rates_24);
2321
2322        hw->wiphy->bands[NL80211_BAND_2GHZ] = &priv->band_24;
2323}
2324
2325static void mwl8k_setup_5ghz_band(struct ieee80211_hw *hw)
2326{
2327        struct mwl8k_priv *priv = hw->priv;
2328
2329        BUILD_BUG_ON(sizeof(priv->channels_50) != sizeof(mwl8k_channels_50));
2330        memcpy(priv->channels_50, mwl8k_channels_50, sizeof(mwl8k_channels_50));
2331
2332        BUILD_BUG_ON(sizeof(priv->rates_50) != sizeof(mwl8k_rates_50));
2333        memcpy(priv->rates_50, mwl8k_rates_50, sizeof(mwl8k_rates_50));
2334
2335        priv->band_50.band = NL80211_BAND_5GHZ;
2336        priv->band_50.channels = priv->channels_50;
2337        priv->band_50.n_channels = ARRAY_SIZE(mwl8k_channels_50);
2338        priv->band_50.bitrates = priv->rates_50;
2339        priv->band_50.n_bitrates = ARRAY_SIZE(mwl8k_rates_50);
2340
2341        hw->wiphy->bands[NL80211_BAND_5GHZ] = &priv->band_50;
2342}
2343
2344/*
2345 * CMD_GET_HW_SPEC (STA version).
2346 */
2347struct mwl8k_cmd_get_hw_spec_sta {
2348        struct mwl8k_cmd_pkt header;
2349        __u8 hw_rev;
2350        __u8 host_interface;
2351        __le16 num_mcaddrs;
2352        __u8 perm_addr[ETH_ALEN];
2353        __le16 region_code;
2354        __le32 fw_rev;
2355        __le32 ps_cookie;
2356        __le32 caps;
2357        __u8 mcs_bitmap[16];
2358        __le32 rx_queue_ptr;
2359        __le32 num_tx_queues;
2360        __le32 tx_queue_ptrs[MWL8K_TX_WMM_QUEUES];
2361        __le32 caps2;
2362        __le32 num_tx_desc_per_queue;
2363        __le32 total_rxd;
2364} __packed;
2365
2366#define MWL8K_CAP_MAX_AMSDU             0x20000000
2367#define MWL8K_CAP_GREENFIELD            0x08000000
2368#define MWL8K_CAP_AMPDU                 0x04000000
2369#define MWL8K_CAP_RX_STBC               0x01000000
2370#define MWL8K_CAP_TX_STBC               0x00800000
2371#define MWL8K_CAP_SHORTGI_40MHZ         0x00400000
2372#define MWL8K_CAP_SHORTGI_20MHZ         0x00200000
2373#define MWL8K_CAP_RX_ANTENNA_MASK       0x000e0000
2374#define MWL8K_CAP_TX_ANTENNA_MASK       0x0001c000
2375#define MWL8K_CAP_DELAY_BA              0x00003000
2376#define MWL8K_CAP_MIMO                  0x00000200
2377#define MWL8K_CAP_40MHZ                 0x00000100
2378#define MWL8K_CAP_BAND_MASK             0x00000007
2379#define MWL8K_CAP_5GHZ                  0x00000004
2380#define MWL8K_CAP_2GHZ4                 0x00000001
2381
2382static void
2383mwl8k_set_ht_caps(struct ieee80211_hw *hw,
2384                  struct ieee80211_supported_band *band, u32 cap)
2385{
2386        int rx_streams;
2387        int tx_streams;
2388
2389        band->ht_cap.ht_supported = 1;
2390
2391        if (cap & MWL8K_CAP_MAX_AMSDU)
2392                band->ht_cap.cap |= IEEE80211_HT_CAP_MAX_AMSDU;
2393        if (cap & MWL8K_CAP_GREENFIELD)
2394                band->ht_cap.cap |= IEEE80211_HT_CAP_GRN_FLD;
2395        if (cap & MWL8K_CAP_AMPDU) {
2396                ieee80211_hw_set(hw, AMPDU_AGGREGATION);
2397                band->ht_cap.ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
2398                band->ht_cap.ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE;
2399        }
2400        if (cap & MWL8K_CAP_RX_STBC)
2401                band->ht_cap.cap |= IEEE80211_HT_CAP_RX_STBC;
2402        if (cap & MWL8K_CAP_TX_STBC)
2403                band->ht_cap.cap |= IEEE80211_HT_CAP_TX_STBC;
2404        if (cap & MWL8K_CAP_SHORTGI_40MHZ)
2405                band->ht_cap.cap |= IEEE80211_HT_CAP_SGI_40;
2406        if (cap & MWL8K_CAP_SHORTGI_20MHZ)
2407                band->ht_cap.cap |= IEEE80211_HT_CAP_SGI_20;
2408        if (cap & MWL8K_CAP_DELAY_BA)
2409                band->ht_cap.cap |= IEEE80211_HT_CAP_DELAY_BA;
2410        if (cap & MWL8K_CAP_40MHZ)
2411                band->ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2412
2413        rx_streams = hweight32(cap & MWL8K_CAP_RX_ANTENNA_MASK);
2414        tx_streams = hweight32(cap & MWL8K_CAP_TX_ANTENNA_MASK);
2415
2416        band->ht_cap.mcs.rx_mask[0] = 0xff;
2417        if (rx_streams >= 2)
2418                band->ht_cap.mcs.rx_mask[1] = 0xff;
2419        if (rx_streams >= 3)
2420                band->ht_cap.mcs.rx_mask[2] = 0xff;
2421        band->ht_cap.mcs.rx_mask[4] = 0x01;
2422        band->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
2423
2424        if (rx_streams != tx_streams) {
2425                band->ht_cap.mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
2426                band->ht_cap.mcs.tx_params |= (tx_streams - 1) <<
2427                                IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
2428        }
2429}
2430
2431static void
2432mwl8k_set_caps(struct ieee80211_hw *hw, u32 caps)
2433{
2434        struct mwl8k_priv *priv = hw->priv;
2435
2436        if (priv->caps)
2437                return;
2438
2439        if ((caps & MWL8K_CAP_2GHZ4) || !(caps & MWL8K_CAP_BAND_MASK)) {
2440                mwl8k_setup_2ghz_band(hw);
2441                if (caps & MWL8K_CAP_MIMO)
2442                        mwl8k_set_ht_caps(hw, &priv->band_24, caps);
2443        }
2444
2445        if (caps & MWL8K_CAP_5GHZ) {
2446                mwl8k_setup_5ghz_band(hw);
2447                if (caps & MWL8K_CAP_MIMO)
2448                        mwl8k_set_ht_caps(hw, &priv->band_50, caps);
2449        }
2450
2451        priv->caps = caps;
2452}
2453
2454static int mwl8k_cmd_get_hw_spec_sta(struct ieee80211_hw *hw)
2455{
2456        struct mwl8k_priv *priv = hw->priv;
2457        struct mwl8k_cmd_get_hw_spec_sta *cmd;
2458        int rc;
2459        int i;
2460
2461        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2462        if (cmd == NULL)
2463                return -ENOMEM;
2464
2465        cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_HW_SPEC);
2466        cmd->header.length = cpu_to_le16(sizeof(*cmd));
2467
2468        memset(cmd->perm_addr, 0xff, sizeof(cmd->perm_addr));
2469        cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2470        cmd->rx_queue_ptr = cpu_to_le32(priv->rxq[0].rxd_dma);
2471        cmd->num_tx_queues = cpu_to_le32(mwl8k_tx_queues(priv));
2472        for (i = 0; i < mwl8k_tx_queues(priv); i++)
2473                cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[i].txd_dma);
2474        cmd->num_tx_desc_per_queue = cpu_to_le32(MWL8K_TX_DESCS);
2475        cmd->total_rxd = cpu_to_le32(MWL8K_RX_DESCS);
2476
2477        rc = mwl8k_post_cmd(hw, &cmd->header);
2478
2479        if (!rc) {
2480                SET_IEEE80211_PERM_ADDR(hw, cmd->perm_addr);
2481                priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs);
2482                priv->fw_rev = le32_to_cpu(cmd->fw_rev);
2483                priv->hw_rev = cmd->hw_rev;
2484                mwl8k_set_caps(hw, le32_to_cpu(cmd->caps));
2485                priv->ap_macids_supported = 0x00000000;
2486                priv->sta_macids_supported = 0x00000001;
2487        }
2488
2489        kfree(cmd);
2490        return rc;
2491}
2492
2493/*
2494 * CMD_GET_HW_SPEC (AP version).
2495 */
2496struct mwl8k_cmd_get_hw_spec_ap {
2497        struct mwl8k_cmd_pkt header;
2498        __u8 hw_rev;
2499        __u8 host_interface;
2500        __le16 num_wcb;
2501        __le16 num_mcaddrs;
2502        __u8 perm_addr[ETH_ALEN];
2503        __le16 region_code;
2504        __le16 num_antenna;
2505        __le32 fw_rev;
2506        __le32 wcbbase0;
2507        __le32 rxwrptr;
2508        __le32 rxrdptr;
2509        __le32 ps_cookie;
2510        __le32 wcbbase1;
2511        __le32 wcbbase2;
2512        __le32 wcbbase3;
2513        __le32 fw_api_version;
2514        __le32 caps;
2515        __le32 num_of_ampdu_queues;
2516        __le32 wcbbase_ampdu[MWL8K_MAX_AMPDU_QUEUES];
2517} __packed;
2518
2519static int mwl8k_cmd_get_hw_spec_ap(struct ieee80211_hw *hw)
2520{
2521        struct mwl8k_priv *priv = hw->priv;
2522        struct mwl8k_cmd_get_hw_spec_ap *cmd;
2523        int rc, i;
2524        u32 api_version;
2525
2526        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2527        if (cmd == NULL)
2528                return -ENOMEM;
2529
2530        cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_HW_SPEC);
2531        cmd->header.length = cpu_to_le16(sizeof(*cmd));
2532
2533        memset(cmd->perm_addr, 0xff, sizeof(cmd->perm_addr));
2534        cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2535
2536        rc = mwl8k_post_cmd(hw, &cmd->header);
2537
2538        if (!rc) {
2539                int off;
2540
2541                api_version = le32_to_cpu(cmd->fw_api_version);
2542                if (priv->device_info->fw_api_ap != api_version) {
2543                        printk(KERN_ERR "%s: Unsupported fw API version for %s."
2544                               "  Expected %d got %d.\n", MWL8K_NAME,
2545                               priv->device_info->part_name,
2546                               priv->device_info->fw_api_ap,
2547                               api_version);
2548                        rc = -EINVAL;
2549                        goto done;
2550                }
2551                SET_IEEE80211_PERM_ADDR(hw, cmd->perm_addr);
2552                priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs);
2553                priv->fw_rev = le32_to_cpu(cmd->fw_rev);
2554                priv->hw_rev = cmd->hw_rev;
2555                mwl8k_set_caps(hw, le32_to_cpu(cmd->caps));
2556                priv->ap_macids_supported = 0x000000ff;
2557                priv->sta_macids_supported = 0x00000100;
2558                priv->num_ampdu_queues = le32_to_cpu(cmd->num_of_ampdu_queues);
2559                if (priv->num_ampdu_queues > MWL8K_MAX_AMPDU_QUEUES) {
2560                        wiphy_warn(hw->wiphy, "fw reported %d ampdu queues"
2561                                   " but we only support %d.\n",
2562                                   priv->num_ampdu_queues,
2563                                   MWL8K_MAX_AMPDU_QUEUES);
2564                        priv->num_ampdu_queues = MWL8K_MAX_AMPDU_QUEUES;
2565                }
2566                off = le32_to_cpu(cmd->rxwrptr) & 0xffff;
2567                iowrite32(priv->rxq[0].rxd_dma, priv->sram + off);
2568
2569                off = le32_to_cpu(cmd->rxrdptr) & 0xffff;
2570                iowrite32(priv->rxq[0].rxd_dma, priv->sram + off);
2571
2572                priv->txq_offset[0] = le32_to_cpu(cmd->wcbbase0) & 0xffff;
2573                priv->txq_offset[1] = le32_to_cpu(cmd->wcbbase1) & 0xffff;
2574                priv->txq_offset[2] = le32_to_cpu(cmd->wcbbase2) & 0xffff;
2575                priv->txq_offset[3] = le32_to_cpu(cmd->wcbbase3) & 0xffff;
2576
2577                for (i = 0; i < priv->num_ampdu_queues; i++)
2578                        priv->txq_offset[i + MWL8K_TX_WMM_QUEUES] =
2579                                le32_to_cpu(cmd->wcbbase_ampdu[i]) & 0xffff;
2580        }
2581
2582done:
2583        kfree(cmd);
2584        return rc;
2585}
2586
2587/*
2588 * CMD_SET_HW_SPEC.
2589 */
2590struct mwl8k_cmd_set_hw_spec {
2591        struct mwl8k_cmd_pkt header;
2592        __u8 hw_rev;
2593        __u8 host_interface;
2594        __le16 num_mcaddrs;
2595        __u8 perm_addr[ETH_ALEN];
2596        __le16 region_code;
2597        __le32 fw_rev;
2598        __le32 ps_cookie;
2599        __le32 caps;
2600        __le32 rx_queue_ptr;
2601        __le32 num_tx_queues;
2602        __le32 tx_queue_ptrs[MWL8K_MAX_TX_QUEUES];
2603        __le32 flags;
2604        __le32 num_tx_desc_per_queue;
2605        __le32 total_rxd;
2606} __packed;
2607
2608/* If enabled, MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY will cause
2609 * packets to expire 500 ms after the timestamp in the tx descriptor.  That is,
2610 * the packets that are queued for more than 500ms, will be dropped in the
2611 * hardware. This helps minimizing the issues caused due to head-of-line
2612 * blocking where a slow client can hog the bandwidth and affect traffic to a
2613 * faster client.
2614 */
2615#define MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY  0x00000400
2616#define MWL8K_SET_HW_SPEC_FLAG_GENERATE_CCMP_HDR        0x00000200
2617#define MWL8K_SET_HW_SPEC_FLAG_HOST_DECR_MGMT           0x00000080
2618#define MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_PROBERESP       0x00000020
2619#define MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_BEACON          0x00000010
2620
2621static int mwl8k_cmd_set_hw_spec(struct ieee80211_hw *hw)
2622{
2623        struct mwl8k_priv *priv = hw->priv;
2624        struct mwl8k_cmd_set_hw_spec *cmd;
2625        int rc;
2626        int i;
2627
2628        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2629        if (cmd == NULL)
2630                return -ENOMEM;
2631
2632        cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_HW_SPEC);
2633        cmd->header.length = cpu_to_le16(sizeof(*cmd));
2634
2635        cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2636        cmd->rx_queue_ptr = cpu_to_le32(priv->rxq[0].rxd_dma);
2637        cmd->num_tx_queues = cpu_to_le32(mwl8k_tx_queues(priv));
2638
2639        /*
2640         * Mac80211 stack has Q0 as highest priority and Q3 as lowest in
2641         * that order. Firmware has Q3 as highest priority and Q0 as lowest
2642         * in that order. Map Q3 of mac80211 to Q0 of firmware so that the
2643         * priority is interpreted the right way in firmware.
2644         */
2645        for (i = 0; i < mwl8k_tx_queues(priv); i++) {
2646                int j = mwl8k_tx_queues(priv) - 1 - i;
2647                cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[j].txd_dma);
2648        }
2649
2650        cmd->flags = cpu_to_le32(MWL8K_SET_HW_SPEC_FLAG_HOST_DECR_MGMT |
2651                                 MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_PROBERESP |
2652                                 MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_BEACON |
2653                                 MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY |
2654                                 MWL8K_SET_HW_SPEC_FLAG_GENERATE_CCMP_HDR);
2655        cmd->num_tx_desc_per_queue = cpu_to_le32(MWL8K_TX_DESCS);
2656        cmd->total_rxd = cpu_to_le32(MWL8K_RX_DESCS);
2657
2658        rc = mwl8k_post_cmd(hw, &cmd->header);
2659        kfree(cmd);
2660
2661        return rc;
2662}
2663
2664/*
2665 * CMD_MAC_MULTICAST_ADR.
2666 */
2667struct mwl8k_cmd_mac_multicast_adr {
2668        struct mwl8k_cmd_pkt header;
2669        __le16 action;
2670        __le16 numaddr;
2671        __u8 addr[0][ETH_ALEN];
2672};
2673
2674#define MWL8K_ENABLE_RX_DIRECTED        0x0001
2675#define MWL8K_ENABLE_RX_MULTICAST       0x0002
2676#define MWL8K_ENABLE_RX_ALL_MULTICAST   0x0004
2677#define MWL8K_ENABLE_RX_BROADCAST       0x0008
2678
2679static struct mwl8k_cmd_pkt *
2680__mwl8k_cmd_mac_multicast_adr(struct ieee80211_hw *hw, int allmulti,
2681                              struct netdev_hw_addr_list *mc_list)
2682{
2683        struct mwl8k_priv *priv = hw->priv;
2684        struct mwl8k_cmd_mac_multicast_adr *cmd;
2685        int size;
2686        int mc_count = 0;
2687
2688        if (mc_list)
2689                mc_count = netdev_hw_addr_list_count(mc_list);
2690
2691        if (allmulti || mc_count > priv->num_mcaddrs) {
2692                allmulti = 1;
2693                mc_count = 0;
2694        }
2695
2696        size = sizeof(*cmd) + mc_count * ETH_ALEN;
2697
2698        cmd = kzalloc(size, GFP_ATOMIC);
2699        if (cmd == NULL)
2700                return NULL;
2701
2702        cmd->header.code = cpu_to_le16(MWL8K_CMD_MAC_MULTICAST_ADR);
2703        cmd->header.length = cpu_to_le16(size);
2704        cmd->action = cpu_to_le16(MWL8K_ENABLE_RX_DIRECTED |
2705                                  MWL8K_ENABLE_RX_BROADCAST);
2706
2707        if (allmulti) {
2708                cmd->action |= cpu_to_le16(MWL8K_ENABLE_RX_ALL_MULTICAST);
2709        } else if (mc_count) {
2710                struct netdev_hw_addr *ha;
2711                int i = 0;
2712
2713                cmd->action |= cpu_to_le16(MWL8K_ENABLE_RX_MULTICAST);
2714                cmd->numaddr = cpu_to_le16(mc_count);
2715                netdev_hw_addr_list_for_each(ha, mc_list) {
2716                        memcpy(cmd->addr[i], ha->addr, ETH_ALEN);
2717                }
2718        }
2719
2720        return &cmd->header;
2721}
2722
2723/*
2724 * CMD_GET_STAT.
2725 */
2726struct mwl8k_cmd_get_stat {
2727        struct mwl8k_cmd_pkt header;
2728        __le32 stats[64];
2729} __packed;
2730
2731#define MWL8K_STAT_ACK_FAILURE  9
2732#define MWL8K_STAT_RTS_FAILURE  12
2733#define MWL8K_STAT_FCS_ERROR    24
2734#define MWL8K_STAT_RTS_SUCCESS  11
2735
2736static int mwl8k_cmd_get_stat(struct ieee80211_hw *hw,
2737                              struct ieee80211_low_level_stats *stats)
2738{
2739        struct mwl8k_cmd_get_stat *cmd;
2740        int rc;
2741
2742        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2743        if (cmd == NULL)
2744                return -ENOMEM;
2745
2746        cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_STAT);
2747        cmd->header.length = cpu_to_le16(sizeof(*cmd));
2748
2749        rc = mwl8k_post_cmd(hw, &cmd->header);
2750        if (!rc) {
2751                stats->dot11ACKFailureCount =
2752                        le32_to_cpu(cmd->stats[MWL8K_STAT_ACK_FAILURE]);
2753                stats->dot11RTSFailureCount =
2754                        le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_FAILURE]);
2755                stats->dot11FCSErrorCount =
2756                        le32_to_cpu(cmd->stats[MWL8K_STAT_FCS_ERROR]);
2757                stats->dot11RTSSuccessCount =
2758                        le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_SUCCESS]);
2759        }
2760        kfree(cmd);
2761
2762        return rc;
2763}
2764
2765/*
2766 * CMD_RADIO_CONTROL.
2767 */
2768struct mwl8k_cmd_radio_control {
2769        struct mwl8k_cmd_pkt header;
2770        __le16 action;
2771        __le16 control;
2772        __le16 radio_on;
2773} __packed;
2774
2775static int
2776mwl8k_cmd_radio_control(struct ieee80211_hw *hw, bool enable, bool force)
2777{
2778        struct mwl8k_priv *priv = hw->priv;
2779        struct mwl8k_cmd_radio_control *cmd;
2780        int rc;
2781
2782        if (enable == priv->radio_on && !force)
2783                return 0;
2784
2785        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2786        if (cmd == NULL)
2787                return -ENOMEM;
2788
2789        cmd->header.code = cpu_to_le16(MWL8K_CMD_RADIO_CONTROL);
2790        cmd->header.length = cpu_to_le16(sizeof(*cmd));
2791        cmd->action = cpu_to_le16(MWL8K_CMD_SET);
2792        cmd->control = cpu_to_le16(priv->radio_short_preamble ? 3 : 1);
2793        cmd->radio_on = cpu_to_le16(enable ? 0x0001 : 0x0000);
2794
2795        rc = mwl8k_post_cmd(hw, &cmd->header);
2796        kfree(cmd);
2797
2798        if (!rc)
2799                priv->radio_on = enable;
2800
2801        return rc;
2802}
2803
2804static int mwl8k_cmd_radio_disable(struct ieee80211_hw *hw)
2805{
2806        return mwl8k_cmd_radio_control(hw, 0, 0);
2807}
2808
2809static int mwl8k_cmd_radio_enable(struct ieee80211_hw *hw)
2810{
2811        return mwl8k_cmd_radio_control(hw, 1, 0);
2812}
2813
2814static int
2815mwl8k_set_radio_preamble(struct ieee80211_hw *hw, bool short_preamble)
2816{
2817        struct mwl8k_priv *priv = hw->priv;
2818
2819        priv->radio_short_preamble = short_preamble;
2820
2821        return mwl8k_cmd_radio_control(hw, 1, 1);
2822}
2823
2824/*
2825 * CMD_RF_TX_POWER.
2826 */
2827#define MWL8K_RF_TX_POWER_LEVEL_TOTAL   8
2828
2829struct mwl8k_cmd_rf_tx_power {
2830        struct mwl8k_cmd_pkt header;
2831        __le16 action;
2832        __le16 support_level;
2833        __le16 current_level;
2834        __le16 reserved;
2835        __le16 power_level_list[MWL8K_RF_TX_POWER_LEVEL_TOTAL];
2836} __packed;
2837
2838static int mwl8k_cmd_rf_tx_power(struct ieee80211_hw *hw, int dBm)
2839{
2840        struct mwl8k_cmd_rf_tx_power *cmd;
2841        int rc;
2842
2843        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2844        if (cmd == NULL)
2845                return -ENOMEM;
2846
2847        cmd->header.code = cpu_to_le16(MWL8K_CMD_RF_TX_POWER);
2848        cmd->header.length = cpu_to_le16(sizeof(*cmd));
2849        cmd->action = cpu_to_le16(MWL8K_CMD_SET);
2850        cmd->support_level = cpu_to_le16(dBm);
2851
2852        rc = mwl8k_post_cmd(hw, &cmd->header);
2853        kfree(cmd);
2854
2855        return rc;
2856}
2857
2858/*
2859 * CMD_TX_POWER.
2860 */
2861#define MWL8K_TX_POWER_LEVEL_TOTAL      12
2862
2863struct mwl8k_cmd_tx_power {
2864        struct mwl8k_cmd_pkt header;
2865        __le16 action;
2866        __le16 band;
2867        __le16 channel;
2868        __le16 bw;
2869        __le16 sub_ch;
2870        __le16 power_level_list[MWL8K_TX_POWER_LEVEL_TOTAL];
2871} __packed;
2872
2873static int mwl8k_cmd_tx_power(struct ieee80211_hw *hw,
2874                                     struct ieee80211_conf *conf,
2875                                     unsigned short pwr)
2876{
2877        struct ieee80211_channel *channel = conf->chandef.chan;
2878        enum nl80211_channel_type channel_type =
2879                cfg80211_get_chandef_type(&conf->chandef);
2880        struct mwl8k_cmd_tx_power *cmd;
2881        int rc;
2882        int i;
2883
2884        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2885        if (cmd == NULL)
2886                return -ENOMEM;
2887
2888        cmd->header.code = cpu_to_le16(MWL8K_CMD_TX_POWER);
2889        cmd->header.length = cpu_to_le16(sizeof(*cmd));
2890        cmd->action = cpu_to_le16(MWL8K_CMD_SET_LIST);
2891
2892        if (channel->band == NL80211_BAND_2GHZ)
2893                cmd->band = cpu_to_le16(0x1);
2894        else if (channel->band == NL80211_BAND_5GHZ)
2895                cmd->band = cpu_to_le16(0x4);
2896
2897        cmd->channel = cpu_to_le16(channel->hw_value);
2898
2899        if (channel_type == NL80211_CHAN_NO_HT ||
2900            channel_type == NL80211_CHAN_HT20) {
2901                cmd->bw = cpu_to_le16(0x2);
2902        } else {
2903                cmd->bw = cpu_to_le16(0x4);
2904                if (channel_type == NL80211_CHAN_HT40MINUS)
2905                        cmd->sub_ch = cpu_to_le16(0x3);
2906                else if (channel_type == NL80211_CHAN_HT40PLUS)
2907                        cmd->sub_ch = cpu_to_le16(0x1);
2908        }
2909
2910        for (i = 0; i < MWL8K_TX_POWER_LEVEL_TOTAL; i++)
2911                cmd->power_level_list[i] = cpu_to_le16(pwr);
2912
2913        rc = mwl8k_post_cmd(hw, &cmd->header);
2914        kfree(cmd);
2915
2916        return rc;
2917}
2918
2919/*
2920 * CMD_RF_ANTENNA.
2921 */
2922struct mwl8k_cmd_rf_antenna {
2923        struct mwl8k_cmd_pkt header;
2924        __le16 antenna;
2925        __le16 mode;
2926} __packed;
2927
2928#define MWL8K_RF_ANTENNA_RX             1
2929#define MWL8K_RF_ANTENNA_TX             2
2930
2931static int
2932mwl8k_cmd_rf_antenna(struct ieee80211_hw *hw, int antenna, int mask)
2933{
2934        struct mwl8k_cmd_rf_antenna *cmd;
2935        int rc;
2936
2937        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2938        if (cmd == NULL)
2939                return -ENOMEM;
2940
2941        cmd->header.code = cpu_to_le16(MWL8K_CMD_RF_ANTENNA);
2942        cmd->header.length = cpu_to_le16(sizeof(*cmd));
2943        cmd->antenna = cpu_to_le16(antenna);
2944        cmd->mode = cpu_to_le16(mask);
2945
2946        rc = mwl8k_post_cmd(hw, &cmd->header);
2947        kfree(cmd);
2948
2949        return rc;
2950}
2951
2952/*
2953 * CMD_SET_BEACON.
2954 */
2955struct mwl8k_cmd_set_beacon {
2956        struct mwl8k_cmd_pkt header;
2957        __le16 beacon_len;
2958        __u8 beacon[0];
2959};
2960
2961static int mwl8k_cmd_set_beacon(struct ieee80211_hw *hw,
2962                                struct ieee80211_vif *vif, u8 *beacon, int len)
2963{
2964        struct mwl8k_cmd_set_beacon *cmd;
2965        int rc;
2966
2967        cmd = kzalloc(sizeof(*cmd) + len, GFP_KERNEL);
2968        if (cmd == NULL)
2969                return -ENOMEM;
2970
2971        cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_BEACON);
2972        cmd->header.length = cpu_to_le16(sizeof(*cmd) + len);
2973        cmd->beacon_len = cpu_to_le16(len);
2974        memcpy(cmd->beacon, beacon, len);
2975
2976        rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
2977        kfree(cmd);
2978
2979        return rc;
2980}
2981
2982/*
2983 * CMD_SET_PRE_SCAN.
2984 */
2985struct mwl8k_cmd_set_pre_scan {
2986        struct mwl8k_cmd_pkt header;
2987} __packed;
2988
2989static int mwl8k_cmd_set_pre_scan(struct ieee80211_hw *hw)
2990{
2991        struct mwl8k_cmd_set_pre_scan *cmd;
2992        int rc;
2993
2994        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2995        if (cmd == NULL)
2996                return -ENOMEM;
2997
2998        cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_PRE_SCAN);
2999        cmd->header.length = cpu_to_le16(sizeof(*cmd));
3000
3001        rc = mwl8k_post_cmd(hw, &cmd->header);
3002        kfree(cmd);
3003
3004        return rc;
3005}
3006
3007/*
3008 * CMD_BBP_REG_ACCESS.
3009 */
3010struct mwl8k_cmd_bbp_reg_access {
3011        struct mwl8k_cmd_pkt header;
3012        __le16 action;
3013        __le16 offset;
3014        u8 value;
3015        u8 rsrv[3];
3016} __packed;
3017
3018static int
3019mwl8k_cmd_bbp_reg_access(struct ieee80211_hw *hw,
3020                         u16 action,
3021                         u16 offset,
3022                         u8 *value)
3023{
3024        struct mwl8k_cmd_bbp_reg_access *cmd;
3025        int rc;
3026
3027        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3028        if (cmd == NULL)
3029                return -ENOMEM;
3030
3031        cmd->header.code = cpu_to_le16(MWL8K_CMD_BBP_REG_ACCESS);
3032        cmd->header.length = cpu_to_le16(sizeof(*cmd));
3033        cmd->action = cpu_to_le16(action);
3034        cmd->offset = cpu_to_le16(offset);
3035
3036        rc = mwl8k_post_cmd(hw, &cmd->header);
3037
3038        if (!rc)
3039                *value = cmd->value;
3040        else
3041                *value = 0;
3042
3043        kfree(cmd);
3044
3045        return rc;
3046}
3047
3048/*
3049 * CMD_SET_POST_SCAN.
3050 */
3051struct mwl8k_cmd_set_post_scan {
3052        struct mwl8k_cmd_pkt header;
3053        __le32 isibss;
3054        __u8 bssid[ETH_ALEN];
3055} __packed;
3056
3057static int
3058mwl8k_cmd_set_post_scan(struct ieee80211_hw *hw, const __u8 *mac)
3059{
3060        struct mwl8k_cmd_set_post_scan *cmd;
3061        int rc;
3062
3063        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3064        if (cmd == NULL)
3065                return -ENOMEM;
3066
3067        cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_POST_SCAN);
3068        cmd->header.length = cpu_to_le16(sizeof(*cmd));
3069        cmd->isibss = 0;
3070        memcpy(cmd->bssid, mac, ETH_ALEN);
3071
3072        rc = mwl8k_post_cmd(hw, &cmd->header);
3073        kfree(cmd);
3074
3075        return rc;
3076}
3077
3078static int freq_to_idx(struct mwl8k_priv *priv, int freq)
3079{
3080        struct ieee80211_supported_band *sband;
3081        int band, ch, idx = 0;
3082
3083        for (band = NL80211_BAND_2GHZ; band < NUM_NL80211_BANDS; band++) {
3084                sband = priv->hw->wiphy->bands[band];
3085                if (!sband)
3086                        continue;
3087
3088                for (ch = 0; ch < sband->n_channels; ch++, idx++)
3089                        if (sband->channels[ch].center_freq == freq)
3090                                goto exit;
3091        }
3092
3093exit:
3094        return idx;
3095}
3096
3097static void mwl8k_update_survey(struct mwl8k_priv *priv,
3098                                struct ieee80211_channel *channel)
3099{
3100        u32 cca_cnt, rx_rdy;
3101        s8 nf = 0, idx;
3102        struct survey_info *survey;
3103
3104        idx = freq_to_idx(priv, priv->acs_chan->center_freq);
3105        if (idx >= MWL8K_NUM_CHANS) {
3106                wiphy_err(priv->hw->wiphy, "Failed to update survey\n");
3107                return;
3108        }
3109
3110        survey = &priv->survey[idx];
3111
3112        cca_cnt = ioread32(priv->regs + NOK_CCA_CNT_REG);
3113        cca_cnt /= 1000; /* uSecs to mSecs */
3114        survey->time_busy = (u64) cca_cnt;
3115
3116        rx_rdy = ioread32(priv->regs + BBU_RXRDY_CNT_REG);
3117        rx_rdy /= 1000; /* uSecs to mSecs */
3118        survey->time_rx = (u64) rx_rdy;
3119
3120        priv->channel_time = jiffies - priv->channel_time;
3121        survey->time = jiffies_to_msecs(priv->channel_time);
3122
3123        survey->channel = channel;
3124
3125        mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &nf);
3126
3127        /* Make sure sign is negative else ACS  at hostapd fails */
3128        survey->noise = nf * -1;
3129
3130        survey->filled = SURVEY_INFO_NOISE_DBM |
3131                         SURVEY_INFO_TIME |
3132                         SURVEY_INFO_TIME_BUSY |
3133                         SURVEY_INFO_TIME_RX;
3134}
3135
3136/*
3137 * CMD_SET_RF_CHANNEL.
3138 */
3139struct mwl8k_cmd_set_rf_channel {
3140        struct mwl8k_cmd_pkt header;
3141        __le16 action;
3142        __u8 current_channel;
3143        __le32 channel_flags;
3144} __packed;
3145
3146static int mwl8k_cmd_set_rf_channel(struct ieee80211_hw *hw,
3147                                    struct ieee80211_conf *conf)
3148{
3149        struct ieee80211_channel *channel = conf->chandef.chan;
3150        enum nl80211_channel_type channel_type =
3151                cfg80211_get_chandef_type(&conf->chandef);
3152        struct mwl8k_cmd_set_rf_channel *cmd;
3153        struct mwl8k_priv *priv = hw->priv;
3154        int rc;
3155
3156        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3157        if (cmd == NULL)
3158                return -ENOMEM;
3159
3160        cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RF_CHANNEL);
3161        cmd->header.length = cpu_to_le16(sizeof(*cmd));
3162        cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3163        cmd->current_channel = channel->hw_value;
3164
3165        if (channel->band == NL80211_BAND_2GHZ)
3166                cmd->channel_flags |= cpu_to_le32(0x00000001);
3167        else if (channel->band == NL80211_BAND_5GHZ)
3168                cmd->channel_flags |= cpu_to_le32(0x00000004);
3169
3170        if (!priv->sw_scan_start) {
3171                if (channel_type == NL80211_CHAN_NO_HT ||
3172                    channel_type == NL80211_CHAN_HT20)
3173                        cmd->channel_flags |= cpu_to_le32(0x00000080);
3174                else if (channel_type == NL80211_CHAN_HT40MINUS)
3175                        cmd->channel_flags |= cpu_to_le32(0x000001900);
3176                else if (channel_type == NL80211_CHAN_HT40PLUS)
3177                        cmd->channel_flags |= cpu_to_le32(0x000000900);
3178        } else {
3179                cmd->channel_flags |= cpu_to_le32(0x00000080);
3180        }
3181
3182        if (priv->sw_scan_start) {
3183                /* Store current channel stats
3184                 * before switching to newer one.
3185                 * This will be processed only for AP fw.
3186                 */
3187                if (priv->channel_time != 0)
3188                        mwl8k_update_survey(priv, priv->acs_chan);
3189
3190                priv->channel_time = jiffies;
3191                priv->acs_chan =  channel;
3192        }
3193
3194        rc = mwl8k_post_cmd(hw, &cmd->header);
3195        kfree(cmd);
3196
3197        return rc;
3198}
3199
3200/*
3201 * CMD_SET_AID.
3202 */
3203#define MWL8K_FRAME_PROT_DISABLED                       0x00
3204#define MWL8K_FRAME_PROT_11G                            0x07
3205#define MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY              0x02
3206#define MWL8K_FRAME_PROT_11N_HT_ALL                     0x06
3207
3208struct mwl8k_cmd_update_set_aid {
3209        struct  mwl8k_cmd_pkt header;
3210        __le16  aid;
3211
3212         /* AP's MAC address (BSSID) */
3213        __u8    bssid[ETH_ALEN];
3214        __le16  protection_mode;
3215        __u8    supp_rates[14];
3216} __packed;
3217
3218static void legacy_rate_mask_to_array(u8 *rates, u32 mask)
3219{
3220        int i;
3221        int j;
3222
3223        /*
3224         * Clear nonstandard rate 4.
3225         */
3226        mask &= 0x1fef;
3227
3228        for (i = 0, j = 0; i < 13; i++) {
3229                if (mask & (1 << i))
3230                        rates[j++] = mwl8k_rates_24[i].hw_value;
3231        }
3232}
3233
3234static int
3235mwl8k_cmd_set_aid(struct ieee80211_hw *hw,
3236                  struct ieee80211_vif *vif, u32 legacy_rate_mask)
3237{
3238        struct mwl8k_cmd_update_set_aid *cmd;
3239        u16 prot_mode;
3240        int rc;
3241
3242        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3243        if (cmd == NULL)
3244                return -ENOMEM;
3245
3246        cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_AID);
3247        cmd->header.length = cpu_to_le16(sizeof(*cmd));
3248        cmd->aid = cpu_to_le16(vif->bss_conf.aid);
3249        memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
3250
3251        if (vif->bss_conf.use_cts_prot) {
3252                prot_mode = MWL8K_FRAME_PROT_11G;
3253        } else {
3254                switch (vif->bss_conf.ht_operation_mode &
3255                        IEEE80211_HT_OP_MODE_PROTECTION) {
3256                case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
3257                        prot_mode = MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY;
3258                        break;
3259                case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
3260                        prot_mode = MWL8K_FRAME_PROT_11N_HT_ALL;
3261                        break;
3262                default:
3263                        prot_mode = MWL8K_FRAME_PROT_DISABLED;
3264                        break;
3265                }
3266        }
3267        cmd->protection_mode = cpu_to_le16(prot_mode);
3268
3269        legacy_rate_mask_to_array(cmd->supp_rates, legacy_rate_mask);
3270
3271        rc = mwl8k_post_cmd(hw, &cmd->header);
3272        kfree(cmd);
3273
3274        return rc;
3275}
3276
3277/*
3278 * CMD_SET_RATE.
3279 */
3280struct mwl8k_cmd_set_rate {
3281        struct  mwl8k_cmd_pkt header;
3282        __u8    legacy_rates[14];
3283
3284        /* Bitmap for supported MCS codes.  */
3285        __u8    mcs_set[16];
3286        __u8    reserved[16];
3287} __packed;
3288
3289static int
3290mwl8k_cmd_set_rate(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
3291                   u32 legacy_rate_mask, u8 *mcs_rates)
3292{
3293        struct mwl8k_cmd_set_rate *cmd;
3294        int rc;
3295
3296        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3297        if (cmd == NULL)
3298                return -ENOMEM;
3299
3300        cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATE);
3301        cmd->header.length = cpu_to_le16(sizeof(*cmd));
3302        legacy_rate_mask_to_array(cmd->legacy_rates, legacy_rate_mask);
3303        memcpy(cmd->mcs_set, mcs_rates, 16);
3304
3305        rc = mwl8k_post_cmd(hw, &cmd->header);
3306        kfree(cmd);
3307
3308        return rc;
3309}
3310
3311/*
3312 * CMD_FINALIZE_JOIN.
3313 */
3314#define MWL8K_FJ_BEACON_MAXLEN  128
3315
3316struct mwl8k_cmd_finalize_join {
3317        struct mwl8k_cmd_pkt header;
3318        __le32 sleep_interval;  /* Number of beacon periods to sleep */
3319        __u8 beacon_data[MWL8K_FJ_BEACON_MAXLEN];
3320} __packed;
3321
3322static int mwl8k_cmd_finalize_join(struct ieee80211_hw *hw, void *frame,
3323                                   int framelen, int dtim)
3324{
3325        struct mwl8k_cmd_finalize_join *cmd;
3326        struct ieee80211_mgmt *payload = frame;
3327        int payload_len;
3328        int rc;
3329
3330        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3331        if (cmd == NULL)
3332                return -ENOMEM;
3333
3334        cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_FINALIZE_JOIN);
3335        cmd->header.length = cpu_to_le16(sizeof(*cmd));
3336        cmd->sleep_interval = cpu_to_le32(dtim ? dtim : 1);
3337
3338        payload_len = framelen - ieee80211_hdrlen(payload->frame_control);
3339        if (payload_len < 0)
3340                payload_len = 0;
3341        else if (payload_len > MWL8K_FJ_BEACON_MAXLEN)
3342                payload_len = MWL8K_FJ_BEACON_MAXLEN;
3343
3344        memcpy(cmd->beacon_data, &payload->u.beacon, payload_len);
3345
3346        rc = mwl8k_post_cmd(hw, &cmd->header);
3347        kfree(cmd);
3348
3349        return rc;
3350}
3351
3352/*
3353 * CMD_SET_RTS_THRESHOLD.
3354 */
3355struct mwl8k_cmd_set_rts_threshold {
3356        struct mwl8k_cmd_pkt header;
3357        __le16 action;
3358        __le16 threshold;
3359} __packed;
3360
3361static int
3362mwl8k_cmd_set_rts_threshold(struct ieee80211_hw *hw, int rts_thresh)
3363{
3364        struct mwl8k_cmd_set_rts_threshold *cmd;
3365        int rc;
3366
3367        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3368        if (cmd == NULL)
3369                return -ENOMEM;
3370
3371        cmd->header.code = cpu_to_le16(MWL8K_CMD_RTS_THRESHOLD);
3372        cmd->header.length = cpu_to_le16(sizeof(*cmd));
3373        cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3374        cmd->threshold = cpu_to_le16(rts_thresh);
3375
3376        rc = mwl8k_post_cmd(hw, &cmd->header);
3377        kfree(cmd);
3378
3379        return rc;
3380}
3381
3382/*
3383 * CMD_SET_SLOT.
3384 */
3385struct mwl8k_cmd_set_slot {
3386        struct mwl8k_cmd_pkt header;
3387        __le16 action;
3388        __u8 short_slot;
3389} __packed;
3390
3391static int mwl8k_cmd_set_slot(struct ieee80211_hw *hw, bool short_slot_time)
3392{
3393        struct mwl8k_cmd_set_slot *cmd;
3394        int rc;
3395
3396        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3397        if (cmd == NULL)
3398                return -ENOMEM;
3399
3400        cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_SLOT);
3401        cmd->header.length = cpu_to_le16(sizeof(*cmd));
3402        cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3403        cmd->short_slot = short_slot_time;
3404
3405        rc = mwl8k_post_cmd(hw, &cmd->header);
3406        kfree(cmd);
3407
3408        return rc;
3409}
3410
3411/*
3412 * CMD_SET_EDCA_PARAMS.
3413 */
3414struct mwl8k_cmd_set_edca_params {
3415        struct mwl8k_cmd_pkt header;
3416
3417        /* See MWL8K_SET_EDCA_XXX below */
3418        __le16 action;
3419
3420        /* TX opportunity in units of 32 us */
3421        __le16 txop;
3422
3423        union {
3424                struct {
3425                        /* Log exponent of max contention period: 0...15 */
3426                        __le32 log_cw_max;
3427
3428                        /* Log exponent of min contention period: 0...15 */
3429                        __le32 log_cw_min;
3430
3431                        /* Adaptive interframe spacing in units of 32us */
3432                        __u8 aifs;
3433
3434                        /* TX queue to configure */
3435                        __u8 txq;
3436                } ap;
3437                struct {
3438                        /* Log exponent of max contention period: 0...15 */
3439                        __u8 log_cw_max;
3440
3441                        /* Log exponent of min contention period: 0...15 */
3442                        __u8 log_cw_min;
3443
3444                        /* Adaptive interframe spacing in units of 32us */
3445                        __u8 aifs;
3446
3447                        /* TX queue to configure */
3448                        __u8 txq;
3449                } sta;
3450        };
3451} __packed;
3452
3453#define MWL8K_SET_EDCA_CW       0x01
3454#define MWL8K_SET_EDCA_TXOP     0x02
3455#define MWL8K_SET_EDCA_AIFS     0x04
3456
3457#define MWL8K_SET_EDCA_ALL      (MWL8K_SET_EDCA_CW | \
3458                                 MWL8K_SET_EDCA_TXOP | \
3459                                 MWL8K_SET_EDCA_AIFS)
3460
3461static int
3462mwl8k_cmd_set_edca_params(struct ieee80211_hw *hw, __u8 qnum,
3463                          __u16 cw_min, __u16 cw_max,
3464                          __u8 aifs, __u16 txop)
3465{
3466        struct mwl8k_priv *priv = hw->priv;
3467        struct mwl8k_cmd_set_edca_params *cmd;
3468        int rc;
3469
3470        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3471        if (cmd == NULL)
3472                return -ENOMEM;
3473
3474        cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_EDCA_PARAMS);
3475        cmd->header.length = cpu_to_le16(sizeof(*cmd));
3476        cmd->action = cpu_to_le16(MWL8K_SET_EDCA_ALL);
3477        cmd->txop = cpu_to_le16(txop);
3478        if (priv->ap_fw) {
3479                cmd->ap.log_cw_max = cpu_to_le32(ilog2(cw_max + 1));
3480                cmd->ap.log_cw_min = cpu_to_le32(ilog2(cw_min + 1));
3481                cmd->ap.aifs = aifs;
3482                cmd->ap.txq = qnum;
3483        } else {
3484                cmd->sta.log_cw_max = (u8)ilog2(cw_max + 1);
3485                cmd->sta.log_cw_min = (u8)ilog2(cw_min + 1);
3486                cmd->sta.aifs = aifs;
3487                cmd->sta.txq = qnum;
3488        }
3489
3490        rc = mwl8k_post_cmd(hw, &cmd->header);
3491        kfree(cmd);
3492
3493        return rc;
3494}
3495
3496/*
3497 * CMD_SET_WMM_MODE.
3498 */
3499struct mwl8k_cmd_set_wmm_mode {
3500        struct mwl8k_cmd_pkt header;
3501        __le16 action;
3502} __packed;
3503
3504static int mwl8k_cmd_set_wmm_mode(struct ieee80211_hw *hw, bool enable)
3505{
3506        struct mwl8k_priv *priv = hw->priv;
3507        struct mwl8k_cmd_set_wmm_mode *cmd;
3508        int rc;
3509
3510        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3511        if (cmd == NULL)
3512                return -ENOMEM;
3513
3514        cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_WMM_MODE);
3515        cmd->header.length = cpu_to_le16(sizeof(*cmd));
3516        cmd->action = cpu_to_le16(!!enable);
3517
3518        rc = mwl8k_post_cmd(hw, &cmd->header);
3519        kfree(cmd);
3520
3521        if (!rc)
3522                priv->wmm_enabled = enable;
3523
3524        return rc;
3525}
3526
3527/*
3528 * CMD_MIMO_CONFIG.
3529 */
3530struct mwl8k_cmd_mimo_config {
3531        struct mwl8k_cmd_pkt header;
3532        __le32 action;
3533        __u8 rx_antenna_map;
3534        __u8 tx_antenna_map;
3535} __packed;
3536
3537static int mwl8k_cmd_mimo_config(struct ieee80211_hw *hw, __u8 rx, __u8 tx)
3538{
3539        struct mwl8k_cmd_mimo_config *cmd;
3540        int rc;
3541
3542        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3543        if (cmd == NULL)
3544                return -ENOMEM;
3545
3546        cmd->header.code = cpu_to_le16(MWL8K_CMD_MIMO_CONFIG);
3547        cmd->header.length = cpu_to_le16(sizeof(*cmd));
3548        cmd->action = cpu_to_le32((u32)MWL8K_CMD_SET);
3549        cmd->rx_antenna_map = rx;
3550        cmd->tx_antenna_map = tx;
3551
3552        rc = mwl8k_post_cmd(hw, &cmd->header);
3553        kfree(cmd);
3554
3555        return rc;
3556}
3557
3558/*
3559 * CMD_USE_FIXED_RATE (STA version).
3560 */
3561struct mwl8k_cmd_use_fixed_rate_sta {
3562        struct mwl8k_cmd_pkt header;
3563        __le32 action;
3564        __le32 allow_rate_drop;
3565        __le32 num_rates;
3566        struct {
3567                __le32 is_ht_rate;
3568                __le32 enable_retry;
3569                __le32 rate;
3570                __le32 retry_count;
3571        } rate_entry[8];
3572        __le32 rate_type;
3573        __le32 reserved1;
3574        __le32 reserved2;
3575} __packed;
3576
3577#define MWL8K_USE_AUTO_RATE     0x0002
3578#define MWL8K_UCAST_RATE        0
3579
3580static int mwl8k_cmd_use_fixed_rate_sta(struct ieee80211_hw *hw)
3581{
3582        struct mwl8k_cmd_use_fixed_rate_sta *cmd;
3583        int rc;
3584
3585        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3586        if (cmd == NULL)
3587                return -ENOMEM;
3588
3589        cmd->header.code = cpu_to_le16(MWL8K_CMD_USE_FIXED_RATE);
3590        cmd->header.length = cpu_to_le16(sizeof(*cmd));
3591        cmd->action = cpu_to_le32(MWL8K_USE_AUTO_RATE);
3592        cmd->rate_type = cpu_to_le32(MWL8K_UCAST_RATE);
3593
3594        rc = mwl8k_post_cmd(hw, &cmd->header);
3595        kfree(cmd);
3596
3597        return rc;
3598}
3599
3600/*
3601 * CMD_USE_FIXED_RATE (AP version).
3602 */
3603struct mwl8k_cmd_use_fixed_rate_ap {
3604        struct mwl8k_cmd_pkt header;
3605        __le32 action;
3606        __le32 allow_rate_drop;
3607        __le32 num_rates;
3608        struct mwl8k_rate_entry_ap {
3609                __le32 is_ht_rate;
3610                __le32 enable_retry;
3611                __le32 rate;
3612                __le32 retry_count;
3613        } rate_entry[4];
3614        u8 multicast_rate;
3615        u8 multicast_rate_type;
3616        u8 management_rate;
3617} __packed;
3618
3619static int
3620mwl8k_cmd_use_fixed_rate_ap(struct ieee80211_hw *hw, int mcast, int mgmt)
3621{
3622        struct mwl8k_cmd_use_fixed_rate_ap *cmd;
3623        int rc;
3624
3625        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3626        if (cmd == NULL)
3627                return -ENOMEM;
3628
3629        cmd->header.code = cpu_to_le16(MWL8K_CMD_USE_FIXED_RATE);
3630        cmd->header.length = cpu_to_le16(sizeof(*cmd));
3631        cmd->action = cpu_to_le32(MWL8K_USE_AUTO_RATE);
3632        cmd->multicast_rate = mcast;
3633        cmd->management_rate = mgmt;
3634
3635        rc = mwl8k_post_cmd(hw, &cmd->header);
3636        kfree(cmd);
3637
3638        return rc;
3639}
3640
3641/*
3642 * CMD_ENABLE_SNIFFER.
3643 */
3644struct mwl8k_cmd_enable_sniffer {
3645        struct mwl8k_cmd_pkt header;
3646        __le32 action;
3647} __packed;
3648
3649static int mwl8k_cmd_enable_sniffer(struct ieee80211_hw *hw, bool enable)
3650{
3651        struct mwl8k_cmd_enable_sniffer *cmd;
3652        int rc;
3653
3654        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3655        if (cmd == NULL)
3656                return -ENOMEM;
3657
3658        cmd->header.code = cpu_to_le16(MWL8K_CMD_ENABLE_SNIFFER);
3659        cmd->header.length = cpu_to_le16(sizeof(*cmd));
3660        cmd->action = cpu_to_le32(!!enable);
3661
3662        rc = mwl8k_post_cmd(hw, &cmd->header);
3663        kfree(cmd);
3664
3665        return rc;
3666}
3667
3668struct mwl8k_cmd_update_mac_addr {
3669        struct mwl8k_cmd_pkt header;
3670        union {
3671                struct {
3672                        __le16 mac_type;
3673                        __u8 mac_addr[ETH_ALEN];
3674                } mbss;
3675                __u8 mac_addr[ETH_ALEN];
3676        };
3677} __packed;
3678
3679#define MWL8K_MAC_TYPE_PRIMARY_CLIENT           0
3680#define MWL8K_MAC_TYPE_SECONDARY_CLIENT         1
3681#define MWL8K_MAC_TYPE_PRIMARY_AP               2
3682#define MWL8K_MAC_TYPE_SECONDARY_AP             3
3683
3684static int mwl8k_cmd_update_mac_addr(struct ieee80211_hw *hw,
3685                                  struct ieee80211_vif *vif, u8 *mac, bool set)
3686{
3687        struct mwl8k_priv *priv = hw->priv;
3688        struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
3689        struct mwl8k_cmd_update_mac_addr *cmd;
3690        int mac_type;
3691        int rc;
3692
3693        mac_type = MWL8K_MAC_TYPE_PRIMARY_AP;
3694        if (vif != NULL && vif->type == NL80211_IFTYPE_STATION) {
3695                if (mwl8k_vif->macid + 1 == ffs(priv->sta_macids_supported))
3696                        if (priv->ap_fw)
3697                                mac_type = MWL8K_MAC_TYPE_SECONDARY_CLIENT;
3698                        else
3699                                mac_type = MWL8K_MAC_TYPE_PRIMARY_CLIENT;
3700                else
3701                        mac_type = MWL8K_MAC_TYPE_SECONDARY_CLIENT;
3702        } else if (vif != NULL && vif->type == NL80211_IFTYPE_AP) {
3703                if (mwl8k_vif->macid + 1 == ffs(priv->ap_macids_supported))
3704                        mac_type = MWL8K_MAC_TYPE_PRIMARY_AP;
3705                else
3706                        mac_type = MWL8K_MAC_TYPE_SECONDARY_AP;
3707        }
3708
3709        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3710        if (cmd == NULL)
3711                return -ENOMEM;
3712
3713        if (set)
3714                cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_MAC_ADDR);
3715        else
3716                cmd->header.code = cpu_to_le16(MWL8K_CMD_DEL_MAC_ADDR);
3717
3718        cmd->header.length = cpu_to_le16(sizeof(*cmd));
3719        if (priv->ap_fw) {
3720                cmd->mbss.mac_type = cpu_to_le16(mac_type);
3721                memcpy(cmd->mbss.mac_addr, mac, ETH_ALEN);
3722        } else {
3723                memcpy(cmd->mac_addr, mac, ETH_ALEN);
3724        }
3725
3726        rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3727        kfree(cmd);
3728
3729        return rc;
3730}
3731
3732/*
3733 * MWL8K_CMD_SET_MAC_ADDR.
3734 */
3735static inline int mwl8k_cmd_set_mac_addr(struct ieee80211_hw *hw,
3736                                  struct ieee80211_vif *vif, u8 *mac)
3737{
3738        return mwl8k_cmd_update_mac_addr(hw, vif, mac, true);
3739}
3740
3741/*
3742 * MWL8K_CMD_DEL_MAC_ADDR.
3743 */
3744static inline int mwl8k_cmd_del_mac_addr(struct ieee80211_hw *hw,
3745                                  struct ieee80211_vif *vif, u8 *mac)
3746{
3747        return mwl8k_cmd_update_mac_addr(hw, vif, mac, false);
3748}
3749
3750/*
3751 * CMD_SET_RATEADAPT_MODE.
3752 */
3753struct mwl8k_cmd_set_rate_adapt_mode {
3754        struct mwl8k_cmd_pkt header;
3755        __le16 action;
3756        __le16 mode;
3757} __packed;
3758
3759static int mwl8k_cmd_set_rateadapt_mode(struct ieee80211_hw *hw, __u16 mode)
3760{
3761        struct mwl8k_cmd_set_rate_adapt_mode *cmd;
3762        int rc;
3763
3764        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3765        if (cmd == NULL)
3766                return -ENOMEM;
3767
3768        cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATEADAPT_MODE);
3769        cmd->header.length = cpu_to_le16(sizeof(*cmd));
3770        cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3771        cmd->mode = cpu_to_le16(mode);
3772
3773        rc = mwl8k_post_cmd(hw, &cmd->header);
3774        kfree(cmd);
3775
3776        return rc;
3777}
3778
3779/*
3780 * CMD_GET_WATCHDOG_BITMAP.
3781 */
3782struct mwl8k_cmd_get_watchdog_bitmap {
3783        struct mwl8k_cmd_pkt header;
3784        u8      bitmap;
3785} __packed;
3786
3787static int mwl8k_cmd_get_watchdog_bitmap(struct ieee80211_hw *hw, u8 *bitmap)
3788{
3789        struct mwl8k_cmd_get_watchdog_bitmap *cmd;
3790        int rc;
3791
3792        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3793        if (cmd == NULL)
3794                return -ENOMEM;
3795
3796        cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_WATCHDOG_BITMAP);
3797        cmd->header.length = cpu_to_le16(sizeof(*cmd));
3798
3799        rc = mwl8k_post_cmd(hw, &cmd->header);
3800        if (!rc)
3801                *bitmap = cmd->bitmap;
3802
3803        kfree(cmd);
3804
3805        return rc;
3806}
3807
3808#define MWL8K_WMM_QUEUE_NUMBER  3
3809
3810static void mwl8k_destroy_ba(struct ieee80211_hw *hw,
3811                             u8 idx);
3812
3813static void mwl8k_watchdog_ba_events(struct work_struct *work)
3814{
3815        int rc;
3816        u8 bitmap = 0, stream_index;
3817        struct mwl8k_ampdu_stream *streams;
3818        struct mwl8k_priv *priv =
3819                container_of(work, struct mwl8k_priv, watchdog_ba_handle);
3820        struct ieee80211_hw *hw = priv->hw;
3821        int i;
3822        u32 status = 0;
3823
3824        mwl8k_fw_lock(hw);
3825
3826        rc = mwl8k_cmd_get_watchdog_bitmap(priv->hw, &bitmap);
3827        if (rc)
3828                goto done;
3829
3830        spin_lock(&priv->stream_lock);
3831
3832        /* the bitmap is the hw queue number.  Map it to the ampdu queue. */
3833        for (i = 0; i < TOTAL_HW_TX_QUEUES; i++) {
3834                if (bitmap & (1 << i)) {
3835                        stream_index = (i + MWL8K_WMM_QUEUE_NUMBER) %
3836                                       TOTAL_HW_TX_QUEUES;
3837                        streams = &priv->ampdu[stream_index];
3838                        if (streams->state == AMPDU_STREAM_ACTIVE) {
3839                                ieee80211_stop_tx_ba_session(streams->sta,
3840                                                             streams->tid);
3841                                spin_unlock(&priv->stream_lock);
3842                                mwl8k_destroy_ba(hw, stream_index);
3843                                spin_lock(&priv->stream_lock);
3844                        }
3845                }
3846        }
3847
3848        spin_unlock(&priv->stream_lock);
3849done:
3850        atomic_dec(&priv->watchdog_event_pending);
3851        status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
3852        iowrite32((status | MWL8K_A2H_INT_BA_WATCHDOG),
3853                  priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
3854        mwl8k_fw_unlock(hw);
3855        return;
3856}
3857
3858
3859/*
3860 * CMD_BSS_START.
3861 */
3862struct mwl8k_cmd_bss_start {
3863        struct mwl8k_cmd_pkt header;
3864        __le32 enable;
3865} __packed;
3866
3867static int mwl8k_cmd_bss_start(struct ieee80211_hw *hw,
3868                               struct ieee80211_vif *vif, int enable)
3869{
3870        struct mwl8k_cmd_bss_start *cmd;
3871        struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
3872        struct mwl8k_priv *priv = hw->priv;
3873        int rc;
3874
3875        if (enable && (priv->running_bsses & (1 << mwl8k_vif->macid)))
3876                return 0;
3877
3878        if (!enable && !(priv->running_bsses & (1 << mwl8k_vif->macid)))
3879                return 0;
3880
3881        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3882        if (cmd == NULL)
3883                return -ENOMEM;
3884
3885        cmd->header.code = cpu_to_le16(MWL8K_CMD_BSS_START);
3886        cmd->header.length = cpu_to_le16(sizeof(*cmd));
3887        cmd->enable = cpu_to_le32(enable);
3888
3889        rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3890        kfree(cmd);
3891
3892        if (!rc) {
3893                if (enable)
3894                        priv->running_bsses |= (1 << mwl8k_vif->macid);
3895                else
3896                        priv->running_bsses &= ~(1 << mwl8k_vif->macid);
3897        }
3898        return rc;
3899}
3900
3901static void mwl8k_enable_bsses(struct ieee80211_hw *hw, bool enable, u32 bitmap)
3902{
3903        struct mwl8k_priv *priv = hw->priv;
3904        struct mwl8k_vif *mwl8k_vif, *tmp_vif;
3905        struct ieee80211_vif *vif;
3906
3907        list_for_each_entry_safe(mwl8k_vif, tmp_vif, &priv->vif_list, list) {
3908                vif = mwl8k_vif->vif;
3909
3910                if (!(bitmap & (1 << mwl8k_vif->macid)))
3911                        continue;
3912
3913                if (vif->type == NL80211_IFTYPE_AP)
3914                        mwl8k_cmd_bss_start(hw, vif, enable);
3915        }
3916}
3917/*
3918 * CMD_BASTREAM.
3919 */
3920
3921/*
3922 * UPSTREAM is tx direction
3923 */
3924#define BASTREAM_FLAG_DIRECTION_UPSTREAM        0x00
3925#define BASTREAM_FLAG_IMMEDIATE_TYPE            0x01
3926
3927enum ba_stream_action_type {
3928        MWL8K_BA_CREATE,
3929        MWL8K_BA_UPDATE,
3930        MWL8K_BA_DESTROY,
3931        MWL8K_BA_FLUSH,
3932        MWL8K_BA_CHECK,
3933};
3934
3935
3936struct mwl8k_create_ba_stream {
3937        __le32  flags;
3938        __le32  idle_thrs;
3939        __le32  bar_thrs;
3940        __le32  window_size;
3941        u8      peer_mac_addr[6];
3942        u8      dialog_token;
3943        u8      tid;
3944        u8      queue_id;
3945        u8      param_info;
3946        __le32  ba_context;
3947        u8      reset_seq_no_flag;
3948        __le16  curr_seq_no;
3949        u8      sta_src_mac_addr[6];
3950} __packed;
3951
3952struct mwl8k_destroy_ba_stream {
3953        __le32  flags;
3954        __le32  ba_context;
3955} __packed;
3956
3957struct mwl8k_cmd_bastream {
3958        struct mwl8k_cmd_pkt    header;
3959        __le32  action;
3960        union {
3961                struct mwl8k_create_ba_stream   create_params;
3962                struct mwl8k_destroy_ba_stream  destroy_params;
3963        };
3964} __packed;
3965
3966static int
3967mwl8k_check_ba(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream,
3968               struct ieee80211_vif *vif)
3969{
3970        struct mwl8k_cmd_bastream *cmd;
3971        int rc;
3972
3973        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3974        if (cmd == NULL)
3975                return -ENOMEM;
3976
3977        cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
3978        cmd->header.length = cpu_to_le16(sizeof(*cmd));
3979
3980        cmd->action = cpu_to_le32(MWL8K_BA_CHECK);
3981
3982        cmd->create_params.queue_id = stream->idx;
3983        memcpy(&cmd->create_params.peer_mac_addr[0], stream->sta->addr,
3984               ETH_ALEN);
3985        cmd->create_params.tid = stream->tid;
3986
3987        cmd->create_params.flags =
3988                cpu_to_le32(BASTREAM_FLAG_IMMEDIATE_TYPE) |
3989                cpu_to_le32(BASTREAM_FLAG_DIRECTION_UPSTREAM);
3990
3991        rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3992
3993        kfree(cmd);
3994
3995        return rc;
3996}
3997
3998static int
3999mwl8k_create_ba(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream,
4000                u8 buf_size, struct ieee80211_vif *vif)
4001{
4002        struct mwl8k_cmd_bastream *cmd;
4003        int rc;
4004
4005        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4006        if (cmd == NULL)
4007                return -ENOMEM;
4008
4009
4010        cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
4011        cmd->header.length = cpu_to_le16(sizeof(*cmd));
4012
4013        cmd->action = cpu_to_le32(MWL8K_BA_CREATE);
4014
4015        cmd->create_params.bar_thrs = cpu_to_le32((u32)buf_size);
4016        cmd->create_params.window_size = cpu_to_le32((u32)buf_size);
4017        cmd->create_params.queue_id = stream->idx;
4018
4019        memcpy(cmd->create_params.peer_mac_addr, stream->sta->addr, ETH_ALEN);
4020        cmd->create_params.tid = stream->tid;
4021        cmd->create_params.curr_seq_no = cpu_to_le16(0);
4022        cmd->create_params.reset_seq_no_flag = 1;
4023
4024        cmd->create_params.param_info =
4025                (stream->sta->ht_cap.ampdu_factor &
4026                 IEEE80211_HT_AMPDU_PARM_FACTOR) |
4027                ((stream->sta->ht_cap.ampdu_density << 2) &
4028                 IEEE80211_HT_AMPDU_PARM_DENSITY);
4029
4030        cmd->create_params.flags =
4031                cpu_to_le32(BASTREAM_FLAG_IMMEDIATE_TYPE |
4032                                        BASTREAM_FLAG_DIRECTION_UPSTREAM);
4033
4034        rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4035
4036        wiphy_debug(hw->wiphy, "Created a BA stream for %pM : tid %d\n",
4037                stream->sta->addr, stream->tid);
4038        kfree(cmd);
4039
4040        return rc;
4041}
4042
4043static void mwl8k_destroy_ba(struct ieee80211_hw *hw,
4044                             u8 idx)
4045{
4046        struct mwl8k_cmd_bastream *cmd;
4047
4048        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4049        if (cmd == NULL)
4050                return;
4051
4052        cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
4053        cmd->header.length = cpu_to_le16(sizeof(*cmd));
4054        cmd->action = cpu_to_le32(MWL8K_BA_DESTROY);
4055
4056        cmd->destroy_params.ba_context = cpu_to_le32(idx);
4057        mwl8k_post_cmd(hw, &cmd->header);
4058
4059        wiphy_debug(hw->wiphy, "Deleted BA stream index %d\n", idx);
4060
4061        kfree(cmd);
4062}
4063
4064/*
4065 * CMD_SET_NEW_STN.
4066 */
4067struct mwl8k_cmd_set_new_stn {
4068        struct mwl8k_cmd_pkt header;
4069        __le16 aid;
4070        __u8 mac_addr[6];
4071        __le16 stn_id;
4072        __le16 action;
4073        __le16 rsvd;
4074        __le32 legacy_rates;
4075        __u8 ht_rates[4];
4076        __le16 cap_info;
4077        __le16 ht_capabilities_info;
4078        __u8 mac_ht_param_info;
4079        __u8 rev;
4080        __u8 control_channel;
4081        __u8 add_channel;
4082        __le16 op_mode;
4083        __le16 stbc;
4084        __u8 add_qos_info;
4085        __u8 is_qos_sta;
4086        __le32 fw_sta_ptr;
4087} __packed;
4088
4089#define MWL8K_STA_ACTION_ADD            0
4090#define MWL8K_STA_ACTION_REMOVE         2
4091
4092static int mwl8k_cmd_set_new_stn_add(struct ieee80211_hw *hw,
4093                                     struct ieee80211_vif *vif,
4094                                     struct ieee80211_sta *sta)
4095{
4096        struct mwl8k_cmd_set_new_stn *cmd;
4097        u32 rates;
4098        int rc;
4099
4100        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4101        if (cmd == NULL)
4102                return -ENOMEM;
4103
4104        cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4105        cmd->header.length = cpu_to_le16(sizeof(*cmd));
4106        cmd->aid = cpu_to_le16(sta->aid);
4107        memcpy(cmd->mac_addr, sta->addr, ETH_ALEN);
4108        cmd->stn_id = cpu_to_le16(sta->aid);
4109        cmd->action = cpu_to_le16(MWL8K_STA_ACTION_ADD);
4110        if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ)
4111                rates = sta->supp_rates[NL80211_BAND_2GHZ];
4112        else
4113                rates = sta->supp_rates[NL80211_BAND_5GHZ] << 5;
4114        cmd->legacy_rates = cpu_to_le32(rates);
4115        if (sta->ht_cap.ht_supported) {
4116                cmd->ht_rates[0] = sta->ht_cap.mcs.rx_mask[0];
4117                cmd->ht_rates[1] = sta->ht_cap.mcs.rx_mask[1];
4118                cmd->ht_rates[2] = sta->ht_cap.mcs.rx_mask[2];
4119                cmd->ht_rates[3] = sta->ht_cap.mcs.rx_mask[3];
4120                cmd->ht_capabilities_info = cpu_to_le16(sta->ht_cap.cap);
4121                cmd->mac_ht_param_info = (sta->ht_cap.ampdu_factor & 3) |
4122                        ((sta->ht_cap.ampdu_density & 7) << 2);
4123                cmd->is_qos_sta = 1;
4124        }
4125
4126        rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4127        kfree(cmd);
4128
4129        return rc;
4130}
4131
4132static int mwl8k_cmd_set_new_stn_add_self(struct ieee80211_hw *hw,
4133                                          struct ieee80211_vif *vif)
4134{
4135        struct mwl8k_cmd_set_new_stn *cmd;
4136        int rc;
4137
4138        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4139        if (cmd == NULL)
4140                return -ENOMEM;
4141
4142        cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4143        cmd->header.length = cpu_to_le16(sizeof(*cmd));
4144        memcpy(cmd->mac_addr, vif->addr, ETH_ALEN);
4145
4146        rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4147        kfree(cmd);
4148
4149        return rc;
4150}
4151
4152static int mwl8k_cmd_set_new_stn_del(struct ieee80211_hw *hw,
4153                                     struct ieee80211_vif *vif, u8 *addr)
4154{
4155        struct mwl8k_cmd_set_new_stn *cmd;
4156        struct mwl8k_priv *priv = hw->priv;
4157        int rc, i;
4158        u8 idx;
4159
4160        spin_lock(&priv->stream_lock);
4161        /* Destroy any active ampdu streams for this sta */
4162        for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
4163                struct mwl8k_ampdu_stream *s;
4164                s = &priv->ampdu[i];
4165                if (s->state != AMPDU_NO_STREAM) {
4166                        if (memcmp(s->sta->addr, addr, ETH_ALEN) == 0) {
4167                                if (s->state == AMPDU_STREAM_ACTIVE) {
4168                                        idx = s->idx;
4169                                        spin_unlock(&priv->stream_lock);
4170                                        mwl8k_destroy_ba(hw, idx);
4171                                        spin_lock(&priv->stream_lock);
4172                                } else if (s->state == AMPDU_STREAM_NEW) {
4173                                        mwl8k_remove_stream(hw, s);
4174                                }
4175                        }
4176                }
4177        }
4178
4179        spin_unlock(&priv->stream_lock);
4180
4181        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4182        if (cmd == NULL)
4183                return -ENOMEM;
4184
4185        cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4186        cmd->header.length = cpu_to_le16(sizeof(*cmd));
4187        memcpy(cmd->mac_addr, addr, ETH_ALEN);
4188        cmd->action = cpu_to_le16(MWL8K_STA_ACTION_REMOVE);
4189
4190        rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4191        kfree(cmd);
4192
4193        return rc;
4194}
4195
4196/*
4197 * CMD_UPDATE_ENCRYPTION.
4198 */
4199
4200#define MAX_ENCR_KEY_LENGTH     16
4201#define MIC_KEY_LENGTH          8
4202
4203struct mwl8k_cmd_update_encryption {
4204        struct mwl8k_cmd_pkt header;
4205
4206        __le32 action;
4207        __le32 reserved;
4208        __u8 mac_addr[6];
4209        __u8 encr_type;
4210
4211} __packed;
4212
4213struct mwl8k_cmd_set_key {
4214        struct mwl8k_cmd_pkt header;
4215
4216        __le32 action;
4217        __le32 reserved;
4218        __le16 length;
4219        __le16 key_type_id;
4220        __le32 key_info;
4221        __le32 key_id;
4222        __le16 key_len;
4223        __u8 key_material[MAX_ENCR_KEY_LENGTH];
4224        __u8 tkip_tx_mic_key[MIC_KEY_LENGTH];
4225        __u8 tkip_rx_mic_key[MIC_KEY_LENGTH];
4226        __le16 tkip_rsc_low;
4227        __le32 tkip_rsc_high;
4228        __le16 tkip_tsc_low;
4229        __le32 tkip_tsc_high;
4230        __u8 mac_addr[6];
4231} __packed;
4232
4233enum {
4234        MWL8K_ENCR_ENABLE,
4235        MWL8K_ENCR_SET_KEY,
4236        MWL8K_ENCR_REMOVE_KEY,
4237        MWL8K_ENCR_SET_GROUP_KEY,
4238};
4239
4240#define MWL8K_UPDATE_ENCRYPTION_TYPE_WEP        0
4241#define MWL8K_UPDATE_ENCRYPTION_TYPE_DISABLE    1
4242#define MWL8K_UPDATE_ENCRYPTION_TYPE_TKIP       4
4243#define MWL8K_UPDATE_ENCRYPTION_TYPE_MIXED      7
4244#define MWL8K_UPDATE_ENCRYPTION_TYPE_AES        8
4245
4246enum {
4247        MWL8K_ALG_WEP,
4248        MWL8K_ALG_TKIP,
4249        MWL8K_ALG_CCMP,
4250};
4251
4252#define MWL8K_KEY_FLAG_TXGROUPKEY       0x00000004
4253#define MWL8K_KEY_FLAG_PAIRWISE         0x00000008
4254#define MWL8K_KEY_FLAG_TSC_VALID        0x00000040
4255#define MWL8K_KEY_FLAG_WEP_TXKEY        0x01000000
4256#define MWL8K_KEY_FLAG_MICKEY_VALID     0x02000000
4257
4258static int mwl8k_cmd_update_encryption_enable(struct ieee80211_hw *hw,
4259                                              struct ieee80211_vif *vif,
4260                                              u8 *addr,
4261                                              u8 encr_type)
4262{
4263        struct mwl8k_cmd_update_encryption *cmd;
4264        int rc;
4265
4266        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4267        if (cmd == NULL)
4268                return -ENOMEM;
4269
4270        cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_ENCRYPTION);
4271        cmd->header.length = cpu_to_le16(sizeof(*cmd));
4272        cmd->action = cpu_to_le32(MWL8K_ENCR_ENABLE);
4273        memcpy(cmd->mac_addr, addr, ETH_ALEN);
4274        cmd->encr_type = encr_type;
4275
4276        rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4277        kfree(cmd);
4278
4279        return rc;
4280}
4281
4282static int mwl8k_encryption_set_cmd_info(struct mwl8k_cmd_set_key *cmd,
4283                                                u8 *addr,
4284                                                struct ieee80211_key_conf *key)
4285{
4286        cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_ENCRYPTION);
4287        cmd->header.length = cpu_to_le16(sizeof(*cmd));
4288        cmd->length = cpu_to_le16(sizeof(*cmd) -
4289                                offsetof(struct mwl8k_cmd_set_key, length));
4290        cmd->key_id = cpu_to_le32(key->keyidx);
4291        cmd->key_len = cpu_to_le16(key->keylen);
4292        memcpy(cmd->mac_addr, addr, ETH_ALEN);
4293
4294        switch (key->cipher) {
4295        case WLAN_CIPHER_SUITE_WEP40:
4296        case WLAN_CIPHER_SUITE_WEP104:
4297                cmd->key_type_id = cpu_to_le16(MWL8K_ALG_WEP);
4298                if (key->keyidx == 0)
4299                        cmd->key_info = cpu_to_le32(MWL8K_KEY_FLAG_WEP_TXKEY);
4300
4301                break;
4302        case WLAN_CIPHER_SUITE_TKIP:
4303                cmd->key_type_id = cpu_to_le16(MWL8K_ALG_TKIP);
4304                cmd->key_info = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4305                        ? cpu_to_le32(MWL8K_KEY_FLAG_PAIRWISE)
4306                        : cpu_to_le32(MWL8K_KEY_FLAG_TXGROUPKEY);
4307                cmd->key_info |= cpu_to_le32(MWL8K_KEY_FLAG_MICKEY_VALID
4308                                                | MWL8K_KEY_FLAG_TSC_VALID);
4309                break;
4310        case WLAN_CIPHER_SUITE_CCMP:
4311                cmd->key_type_id = cpu_to_le16(MWL8K_ALG_CCMP);
4312                cmd->key_info = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4313                        ? cpu_to_le32(MWL8K_KEY_FLAG_PAIRWISE)
4314                        : cpu_to_le32(MWL8K_KEY_FLAG_TXGROUPKEY);
4315                break;
4316        default:
4317                return -ENOTSUPP;
4318        }
4319
4320        return 0;
4321}
4322
4323static int mwl8k_cmd_encryption_set_key(struct ieee80211_hw *hw,
4324                                                struct ieee80211_vif *vif,
4325                                                u8 *addr,
4326                                                struct ieee80211_key_conf *key)
4327{
4328        struct mwl8k_cmd_set_key *cmd;
4329        int rc;
4330        int keymlen;
4331        u32 action;
4332        u8 idx;
4333        struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4334
4335        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4336        if (cmd == NULL)
4337                return -ENOMEM;
4338
4339        rc = mwl8k_encryption_set_cmd_info(cmd, addr, key);
4340        if (rc < 0)
4341                goto done;
4342
4343        idx = key->keyidx;
4344
4345        if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4346                action = MWL8K_ENCR_SET_KEY;
4347        else
4348                action = MWL8K_ENCR_SET_GROUP_KEY;
4349
4350        switch (key->cipher) {
4351        case WLAN_CIPHER_SUITE_WEP40:
4352        case WLAN_CIPHER_SUITE_WEP104:
4353                if (!mwl8k_vif->wep_key_conf[idx].enabled) {
4354                        memcpy(mwl8k_vif->wep_key_conf[idx].key, key,
4355                                                sizeof(*key) + key->keylen);
4356                        mwl8k_vif->wep_key_conf[idx].enabled = 1;
4357                }
4358
4359                keymlen = key->keylen;
4360                action = MWL8K_ENCR_SET_KEY;
4361                break;
4362        case WLAN_CIPHER_SUITE_TKIP:
4363                keymlen = MAX_ENCR_KEY_LENGTH + 2 * MIC_KEY_LENGTH;
4364                break;
4365        case WLAN_CIPHER_SUITE_CCMP:
4366                keymlen = key->keylen;
4367                break;
4368        default:
4369                rc = -ENOTSUPP;
4370                goto done;
4371        }
4372
4373        memcpy(cmd->key_material, key->key, keymlen);
4374        cmd->action = cpu_to_le32(action);
4375
4376        rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4377done:
4378        kfree(cmd);
4379
4380        return rc;
4381}
4382
4383static int mwl8k_cmd_encryption_remove_key(struct ieee80211_hw *hw,
4384                                                struct ieee80211_vif *vif,
4385                                                u8 *addr,
4386                                                struct ieee80211_key_conf *key)
4387{
4388        struct mwl8k_cmd_set_key *cmd;
4389        int rc;
4390        struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4391
4392        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4393        if (cmd == NULL)
4394                return -ENOMEM;
4395
4396        rc = mwl8k_encryption_set_cmd_info(cmd, addr, key);
4397        if (rc < 0)
4398                goto done;
4399
4400        if (key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
4401                        key->cipher == WLAN_CIPHER_SUITE_WEP104)
4402                mwl8k_vif->wep_key_conf[key->keyidx].enabled = 0;
4403
4404        cmd->action = cpu_to_le32(MWL8K_ENCR_REMOVE_KEY);
4405
4406        rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4407done:
4408        kfree(cmd);
4409
4410        return rc;
4411}
4412
4413static int mwl8k_set_key(struct ieee80211_hw *hw,
4414                         enum set_key_cmd cmd_param,
4415                         struct ieee80211_vif *vif,
4416                         struct ieee80211_sta *sta,
4417                         struct ieee80211_key_conf *key)
4418{
4419        int rc = 0;
4420        u8 encr_type;
4421        u8 *addr;
4422        struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4423        struct mwl8k_priv *priv = hw->priv;
4424
4425        if (vif->type == NL80211_IFTYPE_STATION && !priv->ap_fw)
4426                return -EOPNOTSUPP;
4427
4428        if (sta == NULL)
4429                addr = vif->addr;
4430        else
4431                addr = sta->addr;
4432
4433        if (cmd_param == SET_KEY) {
4434                rc = mwl8k_cmd_encryption_set_key(hw, vif, addr, key);
4435                if (rc)
4436                        goto out;
4437
4438                if ((key->cipher == WLAN_CIPHER_SUITE_WEP40)
4439                                || (key->cipher == WLAN_CIPHER_SUITE_WEP104))
4440                        encr_type = MWL8K_UPDATE_ENCRYPTION_TYPE_WEP;
4441                else
4442                        encr_type = MWL8K_UPDATE_ENCRYPTION_TYPE_MIXED;
4443
4444                rc = mwl8k_cmd_update_encryption_enable(hw, vif, addr,
4445                                                                encr_type);
4446                if (rc)
4447                        goto out;
4448
4449                mwl8k_vif->is_hw_crypto_enabled = true;
4450
4451        } else {
4452                rc = mwl8k_cmd_encryption_remove_key(hw, vif, addr, key);
4453
4454                if (rc)
4455                        goto out;
4456        }
4457out:
4458        return rc;
4459}
4460
4461/*
4462 * CMD_UPDATE_STADB.
4463 */
4464struct ewc_ht_info {
4465        __le16  control1;
4466        __le16  control2;
4467        __le16  control3;
4468} __packed;
4469
4470struct peer_capability_info {
4471        /* Peer type - AP vs. STA.  */
4472        __u8    peer_type;
4473
4474        /* Basic 802.11 capabilities from assoc resp.  */
4475        __le16  basic_caps;
4476
4477        /* Set if peer supports 802.11n high throughput (HT).  */
4478        __u8    ht_support;
4479
4480        /* Valid if HT is supported.  */
4481        __le16  ht_caps;
4482        __u8    extended_ht_caps;
4483        struct ewc_ht_info      ewc_info;
4484
4485        /* Legacy rate table. Intersection of our rates and peer rates.  */
4486        __u8    legacy_rates[12];
4487
4488        /* HT rate table. Intersection of our rates and peer rates.  */
4489        __u8    ht_rates[16];
4490        __u8    pad[16];
4491
4492        /* If set, interoperability mode, no proprietary extensions.  */
4493        __u8    interop;
4494        __u8    pad2;
4495        __u8    station_id;
4496        __le16  amsdu_enabled;
4497} __packed;
4498
4499struct mwl8k_cmd_update_stadb {
4500        struct mwl8k_cmd_pkt header;
4501
4502        /* See STADB_ACTION_TYPE */
4503        __le32  action;
4504
4505        /* Peer MAC address */
4506        __u8    peer_addr[ETH_ALEN];
4507
4508        __le32  reserved;
4509
4510        /* Peer info - valid during add/update.  */
4511        struct peer_capability_info     peer_info;
4512} __packed;
4513
4514#define MWL8K_STA_DB_MODIFY_ENTRY       1
4515#define MWL8K_STA_DB_DEL_ENTRY          2
4516
4517/* Peer Entry flags - used to define the type of the peer node */
4518#define MWL8K_PEER_TYPE_ACCESSPOINT     2
4519
4520static int mwl8k_cmd_update_stadb_add(struct ieee80211_hw *hw,
4521                                      struct ieee80211_vif *vif,
4522                                      struct ieee80211_sta *sta)
4523{
4524        struct mwl8k_cmd_update_stadb *cmd;
4525        struct peer_capability_info *p;
4526        u32 rates;
4527        int rc;
4528
4529        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4530        if (cmd == NULL)
4531                return -ENOMEM;
4532
4533        cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_STADB);
4534        cmd->header.length = cpu_to_le16(sizeof(*cmd));
4535        cmd->action = cpu_to_le32(MWL8K_STA_DB_MODIFY_ENTRY);
4536        memcpy(cmd->peer_addr, sta->addr, ETH_ALEN);
4537
4538        p = &cmd->peer_info;
4539        p->peer_type = MWL8K_PEER_TYPE_ACCESSPOINT;
4540        p->basic_caps = cpu_to_le16(vif->bss_conf.assoc_capability);
4541        p->ht_support = sta->ht_cap.ht_supported;
4542        p->ht_caps = cpu_to_le16(sta->ht_cap.cap);
4543        p->extended_ht_caps = (sta->ht_cap.ampdu_factor & 3) |
4544                ((sta->ht_cap.ampdu_density & 7) << 2);
4545        if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ)
4546                rates = sta->supp_rates[NL80211_BAND_2GHZ];
4547        else
4548                rates = sta->supp_rates[NL80211_BAND_5GHZ] << 5;
4549        legacy_rate_mask_to_array(p->legacy_rates, rates);
4550        memcpy(p->ht_rates, sta->ht_cap.mcs.rx_mask, 16);
4551        p->interop = 1;
4552        p->amsdu_enabled = 0;
4553
4554        rc = mwl8k_post_cmd(hw, &cmd->header);
4555        if (!rc)
4556                rc = p->station_id;
4557        kfree(cmd);
4558
4559        return rc;
4560}
4561
4562static int mwl8k_cmd_update_stadb_del(struct ieee80211_hw *hw,
4563                                      struct ieee80211_vif *vif, u8 *addr)
4564{
4565        struct mwl8k_cmd_update_stadb *cmd;
4566        int rc;
4567
4568        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4569        if (cmd == NULL)
4570                return -ENOMEM;
4571
4572        cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_STADB);
4573        cmd->header.length = cpu_to_le16(sizeof(*cmd));
4574        cmd->action = cpu_to_le32(MWL8K_STA_DB_DEL_ENTRY);
4575        memcpy(cmd->peer_addr, addr, ETH_ALEN);
4576
4577        rc = mwl8k_post_cmd(hw, &cmd->header);
4578        kfree(cmd);
4579
4580        return rc;
4581}
4582
4583
4584/*
4585 * Interrupt handling.
4586 */
4587static irqreturn_t mwl8k_interrupt(int irq, void *dev_id)
4588{
4589        struct ieee80211_hw *hw = dev_id;
4590        struct mwl8k_priv *priv = hw->priv;
4591        u32 status;
4592
4593        status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4594        if (!status)
4595                return IRQ_NONE;
4596
4597        if (status & MWL8K_A2H_INT_TX_DONE) {
4598                status &= ~MWL8K_A2H_INT_TX_DONE;
4599                tasklet_schedule(&priv->poll_tx_task);
4600        }
4601
4602        if (status & MWL8K_A2H_INT_RX_READY) {
4603                status &= ~MWL8K_A2H_INT_RX_READY;
4604                tasklet_schedule(&priv->poll_rx_task);
4605        }
4606
4607        if (status & MWL8K_A2H_INT_BA_WATCHDOG) {
4608                iowrite32(~MWL8K_A2H_INT_BA_WATCHDOG,
4609                          priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
4610
4611                atomic_inc(&priv->watchdog_event_pending);
4612                status &= ~MWL8K_A2H_INT_BA_WATCHDOG;
4613                ieee80211_queue_work(hw, &priv->watchdog_ba_handle);
4614        }
4615
4616        if (status)
4617                iowrite32(~status, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4618
4619        if (status & MWL8K_A2H_INT_OPC_DONE) {
4620                if (priv->hostcmd_wait != NULL)
4621                        complete(priv->hostcmd_wait);
4622        }
4623
4624        if (status & MWL8K_A2H_INT_QUEUE_EMPTY) {
4625                if (!mutex_is_locked(&priv->fw_mutex) &&
4626                    priv->radio_on && priv->pending_tx_pkts)
4627                        mwl8k_tx_start(priv);
4628        }
4629
4630        return IRQ_HANDLED;
4631}
4632
4633static void mwl8k_tx_poll(unsigned long data)
4634{
4635        struct ieee80211_hw *hw = (struct ieee80211_hw *)data;
4636        struct mwl8k_priv *priv = hw->priv;
4637        int limit;
4638        int i;
4639
4640        limit = 32;
4641
4642        spin_lock(&priv->tx_lock);
4643
4644        for (i = 0; i < mwl8k_tx_queues(priv); i++)
4645                limit -= mwl8k_txq_reclaim(hw, i, limit, 0);
4646
4647        if (!priv->pending_tx_pkts && priv->tx_wait != NULL) {
4648                complete(priv->tx_wait);
4649                priv->tx_wait = NULL;
4650        }
4651
4652        spin_unlock(&priv->tx_lock);
4653
4654        if (limit) {
4655                writel(~MWL8K_A2H_INT_TX_DONE,
4656                       priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4657        } else {
4658                tasklet_schedule(&priv->poll_tx_task);
4659        }
4660}
4661
4662static void mwl8k_rx_poll(unsigned long data)
4663{
4664        struct ieee80211_hw *hw = (struct ieee80211_hw *)data;
4665        struct mwl8k_priv *priv = hw->priv;
4666        int limit;
4667
4668        limit = 32;
4669        limit -= rxq_process(hw, 0, limit);
4670        limit -= rxq_refill(hw, 0, limit);
4671
4672        if (limit) {
4673                writel(~MWL8K_A2H_INT_RX_READY,
4674                       priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4675        } else {
4676                tasklet_schedule(&priv->poll_rx_task);
4677        }
4678}
4679
4680
4681/*
4682 * Core driver operations.
4683 */
4684static void mwl8k_tx(struct ieee80211_hw *hw,
4685                     struct ieee80211_tx_control *control,
4686                     struct sk_buff *skb)
4687{
4688        struct mwl8k_priv *priv = hw->priv;
4689        int index = skb_get_queue_mapping(skb);
4690
4691        if (!priv->radio_on) {
4692                wiphy_debug(hw->wiphy,
4693                            "dropped TX frame since radio disabled\n");
4694                dev_kfree_skb(skb);
4695                return;
4696        }
4697
4698        mwl8k_txq_xmit(hw, index, control->sta, skb);
4699}
4700
4701static int mwl8k_start(struct ieee80211_hw *hw)
4702{
4703        struct mwl8k_priv *priv = hw->priv;
4704        int rc;
4705
4706        rc = request_irq(priv->pdev->irq, mwl8k_interrupt,
4707                         IRQF_SHARED, MWL8K_NAME, hw);
4708        if (rc) {
4709                priv->irq = -1;
4710                wiphy_err(hw->wiphy, "failed to register IRQ handler\n");
4711                return -EIO;
4712        }
4713        priv->irq = priv->pdev->irq;
4714
4715        /* Enable TX reclaim and RX tasklets.  */
4716        tasklet_enable(&priv->poll_tx_task);
4717        tasklet_enable(&priv->poll_rx_task);
4718
4719        /* Enable interrupts */
4720        iowrite32(MWL8K_A2H_EVENTS, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4721        iowrite32(MWL8K_A2H_EVENTS,
4722                  priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
4723
4724        rc = mwl8k_fw_lock(hw);
4725        if (!rc) {
4726                rc = mwl8k_cmd_radio_enable(hw);
4727
4728                if (!priv->ap_fw) {
4729                        if (!rc)
4730                                rc = mwl8k_cmd_enable_sniffer(hw, 0);
4731
4732                        if (!rc)
4733                                rc = mwl8k_cmd_set_pre_scan(hw);
4734
4735                        if (!rc)
4736                                rc = mwl8k_cmd_set_post_scan(hw,
4737                                                "\x00\x00\x00\x00\x00\x00");
4738                }
4739
4740                if (!rc)
4741                        rc = mwl8k_cmd_set_rateadapt_mode(hw, 0);
4742
4743                if (!rc)
4744                        rc = mwl8k_cmd_set_wmm_mode(hw, 0);
4745
4746                mwl8k_fw_unlock(hw);
4747        }
4748
4749        if (rc) {
4750                iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4751                free_irq(priv->pdev->irq, hw);
4752                priv->irq = -1;
4753                tasklet_disable(&priv->poll_tx_task);
4754                tasklet_disable(&priv->poll_rx_task);
4755        } else {
4756                ieee80211_wake_queues(hw);
4757        }
4758
4759        return rc;
4760}
4761
4762static void mwl8k_stop(struct ieee80211_hw *hw)
4763{
4764        struct mwl8k_priv *priv = hw->priv;
4765        int i;
4766
4767        if (!priv->hw_restart_in_progress)
4768                mwl8k_cmd_radio_disable(hw);
4769
4770        ieee80211_stop_queues(hw);
4771
4772        /* Disable interrupts */
4773        iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4774        if (priv->irq != -1) {
4775                free_irq(priv->pdev->irq, hw);
4776                priv->irq = -1;
4777        }
4778
4779        /* Stop finalize join worker */
4780        cancel_work_sync(&priv->finalize_join_worker);
4781        cancel_work_sync(&priv->watchdog_ba_handle);
4782        if (priv->beacon_skb != NULL)
4783                dev_kfree_skb(priv->beacon_skb);
4784
4785        /* Stop TX reclaim and RX tasklets.  */
4786        tasklet_disable(&priv->poll_tx_task);
4787        tasklet_disable(&priv->poll_rx_task);
4788
4789        /* Return all skbs to mac80211 */
4790        for (i = 0; i < mwl8k_tx_queues(priv); i++)
4791                mwl8k_txq_reclaim(hw, i, INT_MAX, 1);
4792}
4793
4794static int mwl8k_reload_firmware(struct ieee80211_hw *hw, char *fw_image);
4795
4796static int mwl8k_add_interface(struct ieee80211_hw *hw,
4797                               struct ieee80211_vif *vif)
4798{
4799        struct mwl8k_priv *priv = hw->priv;
4800        struct mwl8k_vif *mwl8k_vif;
4801        u32 macids_supported;
4802        int macid, rc;
4803        struct mwl8k_device_info *di;
4804
4805        /*
4806         * Reject interface creation if sniffer mode is active, as
4807         * STA operation is mutually exclusive with hardware sniffer
4808         * mode.  (Sniffer mode is only used on STA firmware.)
4809         */
4810        if (priv->sniffer_enabled) {
4811                wiphy_info(hw->wiphy,
4812                           "unable to create STA interface because sniffer mode is enabled\n");
4813                return -EINVAL;
4814        }
4815
4816        di = priv->device_info;
4817        switch (vif->type) {
4818        case NL80211_IFTYPE_AP:
4819                if (!priv->ap_fw && di->fw_image_ap) {
4820                        /* we must load the ap fw to meet this request */
4821                        if (!list_empty(&priv->vif_list))
4822                                return -EBUSY;
4823                        rc = mwl8k_reload_firmware(hw, di->fw_image_ap);
4824                        if (rc)
4825                                return rc;
4826                }
4827                macids_supported = priv->ap_macids_supported;
4828                break;
4829        case NL80211_IFTYPE_STATION:
4830                if (priv->ap_fw && di->fw_image_sta) {
4831                        if (!list_empty(&priv->vif_list)) {
4832                                wiphy_warn(hw->wiphy, "AP interface is running.\n"
4833                                           "Adding STA interface for WDS");
4834                        } else {
4835                                /* we must load the sta fw to
4836                                 * meet this request.
4837                                 */
4838                                rc = mwl8k_reload_firmware(hw,
4839                                                           di->fw_image_sta);
4840                                if (rc)
4841                                        return rc;
4842                        }
4843                }
4844                macids_supported = priv->sta_macids_supported;
4845                break;
4846        default:
4847                return -EINVAL;
4848        }
4849
4850        macid = ffs(macids_supported & ~priv->macids_used);
4851        if (!macid--)
4852                return -EBUSY;
4853
4854        /* Setup driver private area. */
4855        mwl8k_vif = MWL8K_VIF(vif);
4856        memset(mwl8k_vif, 0, sizeof(*mwl8k_vif));
4857        mwl8k_vif->vif = vif;
4858        mwl8k_vif->macid = macid;
4859        mwl8k_vif->seqno = 0;
4860        memcpy(mwl8k_vif->bssid, vif->addr, ETH_ALEN);
4861        mwl8k_vif->is_hw_crypto_enabled = false;
4862
4863        /* Set the mac address.  */
4864        mwl8k_cmd_set_mac_addr(hw, vif, vif->addr);
4865
4866        if (vif->type == NL80211_IFTYPE_AP)
4867                mwl8k_cmd_set_new_stn_add_self(hw, vif);
4868
4869        priv->macids_used |= 1 << mwl8k_vif->macid;
4870        list_add_tail(&mwl8k_vif->list, &priv->vif_list);
4871
4872        return 0;
4873}
4874
4875static void mwl8k_remove_vif(struct mwl8k_priv *priv, struct mwl8k_vif *vif)
4876{
4877        /* Has ieee80211_restart_hw re-added the removed interfaces? */
4878        if (!priv->macids_used)
4879                return;
4880
4881        priv->macids_used &= ~(1 << vif->macid);
4882        list_del(&vif->list);
4883}
4884
4885static void mwl8k_remove_interface(struct ieee80211_hw *hw,
4886                                   struct ieee80211_vif *vif)
4887{
4888        struct mwl8k_priv *priv = hw->priv;
4889        struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4890
4891        if (vif->type == NL80211_IFTYPE_AP)
4892                mwl8k_cmd_set_new_stn_del(hw, vif, vif->addr);
4893
4894        mwl8k_cmd_del_mac_addr(hw, vif, vif->addr);
4895
4896        mwl8k_remove_vif(priv, mwl8k_vif);
4897}
4898
4899static void mwl8k_hw_restart_work(struct work_struct *work)
4900{
4901        struct mwl8k_priv *priv =
4902                container_of(work, struct mwl8k_priv, fw_reload);
4903        struct ieee80211_hw *hw = priv->hw;
4904        struct mwl8k_device_info *di;
4905        int rc;
4906
4907        /* If some command is waiting for a response, clear it */
4908        if (priv->hostcmd_wait != NULL) {
4909                complete(priv->hostcmd_wait);
4910                priv->hostcmd_wait = NULL;
4911        }
4912
4913        priv->hw_restart_owner = current;
4914        di = priv->device_info;
4915        mwl8k_fw_lock(hw);
4916
4917        if (priv->ap_fw)
4918                rc = mwl8k_reload_firmware(hw, di->fw_image_ap);
4919        else
4920                rc = mwl8k_reload_firmware(hw, di->fw_image_sta);
4921
4922        if (rc)
4923                goto fail;
4924
4925        priv->hw_restart_owner = NULL;
4926        priv->hw_restart_in_progress = false;
4927
4928        /*
4929         * This unlock will wake up the queues and
4930         * also opens the command path for other
4931         * commands
4932         */
4933        mwl8k_fw_unlock(hw);
4934
4935        ieee80211_restart_hw(hw);
4936
4937        wiphy_err(hw->wiphy, "Firmware restarted successfully\n");
4938
4939        return;
4940fail:
4941        mwl8k_fw_unlock(hw);
4942
4943        wiphy_err(hw->wiphy, "Firmware restart failed\n");
4944}
4945
4946static int mwl8k_config(struct ieee80211_hw *hw, u32 changed)
4947{
4948        struct ieee80211_conf *conf = &hw->conf;
4949        struct mwl8k_priv *priv = hw->priv;
4950        int rc;
4951
4952        rc = mwl8k_fw_lock(hw);
4953        if (rc)
4954                return rc;
4955
4956        if (conf->flags & IEEE80211_CONF_IDLE)
4957                rc = mwl8k_cmd_radio_disable(hw);
4958        else
4959                rc = mwl8k_cmd_radio_enable(hw);
4960        if (rc)
4961                goto out;
4962
4963        if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
4964                rc = mwl8k_cmd_set_rf_channel(hw, conf);
4965                if (rc)
4966                        goto out;
4967        }
4968
4969        if (conf->power_level > 18)
4970                conf->power_level = 18;
4971
4972        if (priv->ap_fw) {
4973
4974                if (conf->flags & IEEE80211_CONF_CHANGE_POWER) {
4975                        rc = mwl8k_cmd_tx_power(hw, conf, conf->power_level);
4976                        if (rc)
4977                                goto out;
4978                }
4979
4980
4981        } else {
4982                rc = mwl8k_cmd_rf_tx_power(hw, conf->power_level);
4983                if (rc)
4984                        goto out;
4985                rc = mwl8k_cmd_mimo_config(hw, 0x7, 0x7);
4986        }
4987
4988out:
4989        mwl8k_fw_unlock(hw);
4990
4991        return rc;
4992}
4993
4994static void
4995mwl8k_bss_info_changed_sta(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4996                           struct ieee80211_bss_conf *info, u32 changed)
4997{
4998        struct mwl8k_priv *priv = hw->priv;
4999        u32 ap_legacy_rates = 0;
5000        u8 ap_mcs_rates[16];
5001        int rc;
5002
5003        if (mwl8k_fw_lock(hw))
5004                return;
5005
5006        /*
5007         * No need to capture a beacon if we're no longer associated.
5008         */
5009        if ((changed & BSS_CHANGED_ASSOC) && !vif->bss_conf.assoc)
5010                priv->capture_beacon = false;
5011
5012        /*
5013         * Get the AP's legacy and MCS rates.
5014         */
5015        if (vif->bss_conf.assoc) {
5016                struct ieee80211_sta *ap;
5017
5018                rcu_read_lock();
5019
5020                ap = ieee80211_find_sta(vif, vif->bss_conf.bssid);
5021                if (ap == NULL) {
5022                        rcu_read_unlock();
5023                        goto out;
5024                }
5025
5026                if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ) {
5027                        ap_legacy_rates = ap->supp_rates[NL80211_BAND_2GHZ];
5028                } else {
5029                        ap_legacy_rates =
5030                                ap->supp_rates[NL80211_BAND_5GHZ] << 5;
5031                }
5032                memcpy(ap_mcs_rates, ap->ht_cap.mcs.rx_mask, 16);
5033
5034                rcu_read_unlock();
5035
5036                if (changed & BSS_CHANGED_ASSOC) {
5037                        if (!priv->ap_fw) {
5038                                rc = mwl8k_cmd_set_rate(hw, vif,
5039                                                        ap_legacy_rates,
5040                                                        ap_mcs_rates);
5041                                if (rc)
5042                                        goto out;
5043
5044                                rc = mwl8k_cmd_use_fixed_rate_sta(hw);
5045                                if (rc)
5046                                        goto out;
5047                        } else {
5048                                int idx;
5049                                int rate;
5050
5051                                /* Use AP firmware specific rate command.
5052                                 */
5053                                idx = ffs(vif->bss_conf.basic_rates);
5054                                if (idx)
5055                                        idx--;
5056
5057                                if (hw->conf.chandef.chan->band ==
5058                                    NL80211_BAND_2GHZ)
5059                                        rate = mwl8k_rates_24[idx].hw_value;
5060                                else
5061                                        rate = mwl8k_rates_50[idx].hw_value;
5062
5063                                mwl8k_cmd_use_fixed_rate_ap(hw, rate, rate);
5064                        }
5065                }
5066        }
5067
5068        if (changed & BSS_CHANGED_ERP_PREAMBLE) {
5069                rc = mwl8k_set_radio_preamble(hw,
5070                                vif->bss_conf.use_short_preamble);
5071                if (rc)
5072                        goto out;
5073        }
5074
5075        if ((changed & BSS_CHANGED_ERP_SLOT) && !priv->ap_fw)  {
5076                rc = mwl8k_cmd_set_slot(hw, vif->bss_conf.use_short_slot);
5077                if (rc)
5078                        goto out;
5079        }
5080
5081        if (vif->bss_conf.assoc && !priv->ap_fw &&
5082            (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_ERP_CTS_PROT |
5083                        BSS_CHANGED_HT))) {
5084                rc = mwl8k_cmd_set_aid(hw, vif, ap_legacy_rates);
5085                if (rc)
5086                        goto out;
5087        }
5088
5089        if (vif->bss_conf.assoc &&
5090            (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_BEACON_INT))) {
5091                /*
5092                 * Finalize the join.  Tell rx handler to process
5093                 * next beacon from our BSSID.
5094                 */
5095                memcpy(priv->capture_bssid, vif->bss_conf.bssid, ETH_ALEN);
5096                priv->capture_beacon = true;
5097        }
5098
5099out:
5100        mwl8k_fw_unlock(hw);
5101}
5102
5103static void
5104mwl8k_bss_info_changed_ap(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5105                          struct ieee80211_bss_conf *info, u32 changed)
5106{
5107        int rc;
5108
5109        if (mwl8k_fw_lock(hw))
5110                return;
5111
5112        if (changed & BSS_CHANGED_ERP_PREAMBLE) {
5113                rc = mwl8k_set_radio_preamble(hw,
5114                                vif->bss_conf.use_short_preamble);
5115                if (rc)
5116                        goto out;
5117        }
5118
5119        if (changed & BSS_CHANGED_BASIC_RATES) {
5120                int idx;
5121                int rate;
5122
5123                /*
5124                 * Use lowest supported basic rate for multicasts
5125                 * and management frames (such as probe responses --
5126                 * beacons will always go out at 1 Mb/s).
5127                 */
5128                idx = ffs(vif->bss_conf.basic_rates);
5129                if (idx)
5130                        idx--;
5131
5132                if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ)
5133                        rate = mwl8k_rates_24[idx].hw_value;
5134                else
5135                        rate = mwl8k_rates_50[idx].hw_value;
5136
5137                mwl8k_cmd_use_fixed_rate_ap(hw, rate, rate);
5138        }
5139
5140        if (changed & (BSS_CHANGED_BEACON_INT | BSS_CHANGED_BEACON)) {
5141                struct sk_buff *skb;
5142
5143                skb = ieee80211_beacon_get(hw, vif);
5144                if (skb != NULL) {
5145                        mwl8k_cmd_set_beacon(hw, vif, skb->data, skb->len);
5146                        kfree_skb(skb);
5147                }
5148        }
5149
5150        if (changed & BSS_CHANGED_BEACON_ENABLED)
5151                mwl8k_cmd_bss_start(hw, vif, info->enable_beacon);
5152
5153out:
5154        mwl8k_fw_unlock(hw);
5155}
5156
5157static void
5158mwl8k_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5159                       struct ieee80211_bss_conf *info, u32 changed)
5160{
5161        if (vif->type == NL80211_IFTYPE_STATION)
5162                mwl8k_bss_info_changed_sta(hw, vif, info, changed);
5163        if (vif->type == NL80211_IFTYPE_AP)
5164                mwl8k_bss_info_changed_ap(hw, vif, info, changed);
5165}
5166
5167static u64 mwl8k_prepare_multicast(struct ieee80211_hw *hw,
5168                                   struct netdev_hw_addr_list *mc_list)
5169{
5170        struct mwl8k_cmd_pkt *cmd;
5171
5172        /*
5173         * Synthesize and return a command packet that programs the
5174         * hardware multicast address filter.  At this point we don't
5175         * know whether FIF_ALLMULTI is being requested, but if it is,
5176         * we'll end up throwing this packet away and creating a new
5177         * one in mwl8k_configure_filter().
5178         */
5179        cmd = __mwl8k_cmd_mac_multicast_adr(hw, 0, mc_list);
5180
5181        return (unsigned long)cmd;
5182}
5183
5184static int
5185mwl8k_configure_filter_sniffer(struct ieee80211_hw *hw,
5186                               unsigned int changed_flags,
5187                               unsigned int *total_flags)
5188{
5189        struct mwl8k_priv *priv = hw->priv;
5190
5191        /*
5192         * Hardware sniffer mode is mutually exclusive with STA
5193         * operation, so refuse to enable sniffer mode if a STA
5194         * interface is active.
5195         */
5196        if (!list_empty(&priv->vif_list)) {
5197                if (net_ratelimit())
5198                        wiphy_info(hw->wiphy,
5199                                   "not enabling sniffer mode because STA interface is active\n");
5200                return 0;
5201        }
5202
5203        if (!priv->sniffer_enabled) {
5204                if (mwl8k_cmd_enable_sniffer(hw, 1))
5205                        return 0;
5206                priv->sniffer_enabled = true;
5207        }
5208
5209        *total_flags &= FIF_ALLMULTI |
5210                        FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL |
5211                        FIF_OTHER_BSS;
5212
5213        return 1;
5214}
5215
5216static struct mwl8k_vif *mwl8k_first_vif(struct mwl8k_priv *priv)
5217{
5218        if (!list_empty(&priv->vif_list))
5219                return list_entry(priv->vif_list.next, struct mwl8k_vif, list);
5220
5221        return NULL;
5222}
5223
5224static void mwl8k_configure_filter(struct ieee80211_hw *hw,
5225                                   unsigned int changed_flags,
5226                                   unsigned int *total_flags,
5227                                   u64 multicast)
5228{
5229        struct mwl8k_priv *priv = hw->priv;
5230        struct mwl8k_cmd_pkt *cmd = (void *)(unsigned long)multicast;
5231
5232        /*
5233         * AP firmware doesn't allow fine-grained control over
5234         * the receive filter.
5235         */
5236        if (priv->ap_fw) {
5237                *total_flags &= FIF_ALLMULTI | FIF_BCN_PRBRESP_PROMISC;
5238                kfree(cmd);
5239                return;
5240        }
5241
5242        /*
5243         * Enable hardware sniffer mode if FIF_CONTROL or
5244         * FIF_OTHER_BSS is requested.
5245         */
5246        if (*total_flags & (FIF_CONTROL | FIF_OTHER_BSS) &&
5247            mwl8k_configure_filter_sniffer(hw, changed_flags, total_flags)) {
5248                kfree(cmd);
5249                return;
5250        }
5251
5252        /* Clear unsupported feature flags */
5253        *total_flags &= FIF_ALLMULTI | FIF_BCN_PRBRESP_PROMISC;
5254
5255        if (mwl8k_fw_lock(hw)) {
5256                kfree(cmd);
5257                return;
5258        }
5259
5260        if (priv->sniffer_enabled) {
5261                mwl8k_cmd_enable_sniffer(hw, 0);
5262                priv->sniffer_enabled = false;
5263        }
5264
5265        if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
5266                if (*total_flags & FIF_BCN_PRBRESP_PROMISC) {
5267                        /*
5268                         * Disable the BSS filter.
5269                         */
5270                        mwl8k_cmd_set_pre_scan(hw);
5271                } else {
5272                        struct mwl8k_vif *mwl8k_vif;
5273                        const u8 *bssid;
5274
5275                        /*
5276                         * Enable the BSS filter.
5277                         *
5278                         * If there is an active STA interface, use that
5279                         * interface's BSSID, otherwise use a dummy one
5280                         * (where the OUI part needs to be nonzero for
5281                         * the BSSID to be accepted by POST_SCAN).
5282                         */
5283                        mwl8k_vif = mwl8k_first_vif(priv);
5284                        if (mwl8k_vif != NULL)
5285                                bssid = mwl8k_vif->vif->bss_conf.bssid;
5286                        else
5287                                bssid = "\x01\x00\x00\x00\x00\x00";
5288
5289                        mwl8k_cmd_set_post_scan(hw, bssid);
5290                }
5291        }
5292
5293        /*
5294         * If FIF_ALLMULTI is being requested, throw away the command
5295         * packet that ->prepare_multicast() built and replace it with
5296         * a command packet that enables reception of all multicast
5297         * packets.
5298         */
5299        if (*total_flags & FIF_ALLMULTI) {
5300                kfree(cmd);
5301                cmd = __mwl8k_cmd_mac_multicast_adr(hw, 1, NULL);
5302        }
5303
5304        if (cmd != NULL) {
5305                mwl8k_post_cmd(hw, cmd);
5306                kfree(cmd);
5307        }
5308
5309        mwl8k_fw_unlock(hw);
5310}
5311
5312static int mwl8k_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
5313{
5314        return mwl8k_cmd_set_rts_threshold(hw, value);
5315}
5316
5317static int mwl8k_sta_remove(struct ieee80211_hw *hw,
5318                            struct ieee80211_vif *vif,
5319                            struct ieee80211_sta *sta)
5320{
5321        struct mwl8k_priv *priv = hw->priv;
5322
5323        if (priv->ap_fw)
5324                return mwl8k_cmd_set_new_stn_del(hw, vif, sta->addr);
5325        else
5326                return mwl8k_cmd_update_stadb_del(hw, vif, sta->addr);
5327}
5328
5329static int mwl8k_sta_add(struct ieee80211_hw *hw,
5330                         struct ieee80211_vif *vif,
5331                         struct ieee80211_sta *sta)
5332{
5333        struct mwl8k_priv *priv = hw->priv;
5334        int ret;
5335        int i;
5336        struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
5337        struct ieee80211_key_conf *key;
5338
5339        if (!priv->ap_fw) {
5340                ret = mwl8k_cmd_update_stadb_add(hw, vif, sta);
5341                if (ret >= 0) {
5342                        MWL8K_STA(sta)->peer_id = ret;
5343                        if (sta->ht_cap.ht_supported)
5344                                MWL8K_STA(sta)->is_ampdu_allowed = true;
5345                        ret = 0;
5346                }
5347
5348        } else {
5349                ret = mwl8k_cmd_set_new_stn_add(hw, vif, sta);
5350        }
5351
5352        for (i = 0; i < NUM_WEP_KEYS; i++) {
5353                key = IEEE80211_KEY_CONF(mwl8k_vif->wep_key_conf[i].key);
5354                if (mwl8k_vif->wep_key_conf[i].enabled)
5355                        mwl8k_set_key(hw, SET_KEY, vif, sta, key);
5356        }
5357        return ret;
5358}
5359
5360static int mwl8k_conf_tx(struct ieee80211_hw *hw,
5361                         struct ieee80211_vif *vif, u16 queue,
5362                         const struct ieee80211_tx_queue_params *params)
5363{
5364        struct mwl8k_priv *priv = hw->priv;
5365        int rc;
5366
5367        rc = mwl8k_fw_lock(hw);
5368        if (!rc) {
5369                BUG_ON(queue > MWL8K_TX_WMM_QUEUES - 1);
5370                memcpy(&priv->wmm_params[queue], params, sizeof(*params));
5371
5372                if (!priv->wmm_enabled)
5373                        rc = mwl8k_cmd_set_wmm_mode(hw, 1);
5374
5375                if (!rc) {
5376                        int q = MWL8K_TX_WMM_QUEUES - 1 - queue;
5377                        rc = mwl8k_cmd_set_edca_params(hw, q,
5378                                                       params->cw_min,
5379                                                       params->cw_max,
5380                                                       params->aifs,
5381                                                       params->txop);
5382                }
5383
5384                mwl8k_fw_unlock(hw);
5385        }
5386
5387        return rc;
5388}
5389
5390static int mwl8k_get_stats(struct ieee80211_hw *hw,
5391                           struct ieee80211_low_level_stats *stats)
5392{
5393        return mwl8k_cmd_get_stat(hw, stats);
5394}
5395
5396static int mwl8k_get_survey(struct ieee80211_hw *hw, int idx,
5397                                struct survey_info *survey)
5398{
5399        struct mwl8k_priv *priv = hw->priv;
5400        struct ieee80211_conf *conf = &hw->conf;
5401        struct ieee80211_supported_band *sband;
5402
5403        if (priv->ap_fw) {
5404                sband = hw->wiphy->bands[NL80211_BAND_2GHZ];
5405
5406                if (sband && idx >= sband->n_channels) {
5407                        idx -= sband->n_channels;
5408                        sband = NULL;
5409                }
5410
5411                if (!sband)
5412                        sband = hw->wiphy->bands[NL80211_BAND_5GHZ];
5413
5414                if (!sband || idx >= sband->n_channels)
5415                        return -ENOENT;
5416
5417                memcpy(survey, &priv->survey[idx], sizeof(*survey));
5418                survey->channel = &sband->channels[idx];
5419
5420                return 0;
5421        }
5422
5423        if (idx != 0)
5424                return -ENOENT;
5425
5426        survey->channel = conf->chandef.chan;
5427        survey->filled = SURVEY_INFO_NOISE_DBM;
5428        survey->noise = priv->noise;
5429
5430        return 0;
5431}
5432
5433#define MAX_AMPDU_ATTEMPTS 5
5434
5435static int
5436mwl8k_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5437                   struct ieee80211_ampdu_params *params)
5438{
5439        struct ieee80211_sta *sta = params->sta;
5440        enum ieee80211_ampdu_mlme_action action = params->action;
5441        u16 tid = params->tid;
5442        u16 *ssn = &params->ssn;
5443        u8 buf_size = params->buf_size;
5444        int i, rc = 0;
5445        struct mwl8k_priv *priv = hw->priv;
5446        struct mwl8k_ampdu_stream *stream;
5447        u8 *addr = sta->addr, idx;
5448        struct mwl8k_sta *sta_info = MWL8K_STA(sta);
5449
5450        if (!ieee80211_hw_check(hw, AMPDU_AGGREGATION))
5451                return -ENOTSUPP;
5452
5453        spin_lock(&priv->stream_lock);
5454        stream = mwl8k_lookup_stream(hw, addr, tid);
5455
5456        switch (action) {
5457        case IEEE80211_AMPDU_RX_START:
5458        case IEEE80211_AMPDU_RX_STOP:
5459                break;
5460        case IEEE80211_AMPDU_TX_START:
5461                /* By the time we get here the hw queues may contain outgoing
5462                 * packets for this RA/TID that are not part of this BA
5463                 * session.  The hw will assign sequence numbers to these
5464                 * packets as they go out.  So if we query the hw for its next
5465                 * sequence number and use that for the SSN here, it may end up
5466                 * being wrong, which will lead to sequence number mismatch at
5467                 * the recipient.  To avoid this, we reset the sequence number
5468                 * to O for the first MPDU in this BA stream.
5469                 */
5470                *ssn = 0;
5471                if (stream == NULL) {
5472                        /* This means that somebody outside this driver called
5473                         * ieee80211_start_tx_ba_session.  This is unexpected
5474                         * because we do our own rate control.  Just warn and
5475                         * move on.
5476                         */
5477                        wiphy_warn(hw->wiphy, "Unexpected call to %s.  "
5478                                   "Proceeding anyway.\n", __func__);
5479                        stream = mwl8k_add_stream(hw, sta, tid);
5480                }
5481                if (stream == NULL) {
5482                        wiphy_debug(hw->wiphy, "no free AMPDU streams\n");
5483                        rc = -EBUSY;
5484                        break;
5485                }
5486                stream->state = AMPDU_STREAM_IN_PROGRESS;
5487
5488                /* Release the lock before we do the time consuming stuff */
5489                spin_unlock(&priv->stream_lock);
5490                for (i = 0; i < MAX_AMPDU_ATTEMPTS; i++) {
5491
5492                        /* Check if link is still valid */
5493                        if (!sta_info->is_ampdu_allowed) {
5494                                spin_lock(&priv->stream_lock);
5495                                mwl8k_remove_stream(hw, stream);
5496                                spin_unlock(&priv->stream_lock);
5497                                return -EBUSY;
5498                        }
5499
5500                        rc = mwl8k_check_ba(hw, stream, vif);
5501
5502                        /* If HW restart is in progress mwl8k_post_cmd will
5503                         * return -EBUSY. Avoid retrying mwl8k_check_ba in
5504                         * such cases
5505                         */
5506                        if (!rc || rc == -EBUSY)
5507                                break;
5508                        /*
5509                         * HW queues take time to be flushed, give them
5510                         * sufficient time
5511                         */
5512
5513                        msleep(1000);
5514                }
5515                spin_lock(&priv->stream_lock);
5516                if (rc) {
5517                        wiphy_err(hw->wiphy, "Stream for tid %d busy after %d"
5518                                " attempts\n", tid, MAX_AMPDU_ATTEMPTS);
5519                        mwl8k_remove_stream(hw, stream);
5520                        rc = -EBUSY;
5521                        break;
5522                }
5523                rc = IEEE80211_AMPDU_TX_START_IMMEDIATE;
5524                break;
5525        case IEEE80211_AMPDU_TX_STOP_CONT:
5526        case IEEE80211_AMPDU_TX_STOP_FLUSH:
5527        case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
5528                if (stream) {
5529                        if (stream->state == AMPDU_STREAM_ACTIVE) {
5530                                idx = stream->idx;
5531                                spin_unlock(&priv->stream_lock);
5532                                mwl8k_destroy_ba(hw, idx);
5533                                spin_lock(&priv->stream_lock);
5534                        }
5535                        mwl8k_remove_stream(hw, stream);
5536                }
5537                ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
5538                break;
5539        case IEEE80211_AMPDU_TX_OPERATIONAL:
5540                BUG_ON(stream == NULL);
5541                BUG_ON(stream->state != AMPDU_STREAM_IN_PROGRESS);
5542                spin_unlock(&priv->stream_lock);
5543                rc = mwl8k_create_ba(hw, stream, buf_size, vif);
5544                spin_lock(&priv->stream_lock);
5545                if (!rc)
5546                        stream->state = AMPDU_STREAM_ACTIVE;
5547                else {
5548                        idx = stream->idx;
5549                        spin_unlock(&priv->stream_lock);
5550                        mwl8k_destroy_ba(hw, idx);
5551                        spin_lock(&priv->stream_lock);
5552                        wiphy_debug(hw->wiphy,
5553                                "Failed adding stream for sta %pM tid %d\n",
5554                                addr, tid);
5555                        mwl8k_remove_stream(hw, stream);
5556                }
5557                break;
5558
5559        default:
5560                rc = -ENOTSUPP;
5561        }
5562
5563        spin_unlock(&priv->stream_lock);
5564        return rc;
5565}
5566
5567static void mwl8k_sw_scan_start(struct ieee80211_hw *hw,
5568                                struct ieee80211_vif *vif,
5569                                const u8 *mac_addr)
5570{
5571        struct mwl8k_priv *priv = hw->priv;
5572        u8 tmp;
5573
5574        if (!priv->ap_fw)
5575                return;
5576
5577        /* clear all stats */
5578        priv->channel_time = 0;
5579        ioread32(priv->regs + BBU_RXRDY_CNT_REG);
5580        ioread32(priv->regs + NOK_CCA_CNT_REG);
5581        mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &tmp);
5582
5583        priv->sw_scan_start = true;
5584}
5585
5586static void mwl8k_sw_scan_complete(struct ieee80211_hw *hw,
5587                                   struct ieee80211_vif *vif)
5588{
5589        struct mwl8k_priv *priv = hw->priv;
5590        u8 tmp;
5591
5592        if (!priv->ap_fw)
5593                return;
5594
5595        priv->sw_scan_start = false;
5596
5597        /* clear all stats */
5598        priv->channel_time = 0;
5599        ioread32(priv->regs + BBU_RXRDY_CNT_REG);
5600        ioread32(priv->regs + NOK_CCA_CNT_REG);
5601        mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &tmp);
5602}
5603
5604static const struct ieee80211_ops mwl8k_ops = {
5605        .tx                     = mwl8k_tx,
5606        .start                  = mwl8k_start,
5607        .stop                   = mwl8k_stop,
5608        .add_interface          = mwl8k_add_interface,
5609        .remove_interface       = mwl8k_remove_interface,
5610        .config                 = mwl8k_config,
5611        .bss_info_changed       = mwl8k_bss_info_changed,
5612        .prepare_multicast      = mwl8k_prepare_multicast,
5613        .configure_filter       = mwl8k_configure_filter,
5614        .set_key                = mwl8k_set_key,
5615        .set_rts_threshold      = mwl8k_set_rts_threshold,
5616        .sta_add                = mwl8k_sta_add,
5617        .sta_remove             = mwl8k_sta_remove,
5618        .conf_tx                = mwl8k_conf_tx,
5619        .get_stats              = mwl8k_get_stats,
5620        .get_survey             = mwl8k_get_survey,
5621        .ampdu_action           = mwl8k_ampdu_action,
5622        .sw_scan_start          = mwl8k_sw_scan_start,
5623        .sw_scan_complete       = mwl8k_sw_scan_complete,
5624};
5625
5626static void mwl8k_finalize_join_worker(struct work_struct *work)
5627{
5628        struct mwl8k_priv *priv =
5629                container_of(work, struct mwl8k_priv, finalize_join_worker);
5630        struct sk_buff *skb = priv->beacon_skb;
5631        struct ieee80211_mgmt *mgmt = (void *)skb->data;
5632        int len = skb->len - offsetof(struct ieee80211_mgmt, u.beacon.variable);
5633        const u8 *tim = cfg80211_find_ie(WLAN_EID_TIM,
5634                                         mgmt->u.beacon.variable, len);
5635        int dtim_period = 1;
5636
5637        if (tim && tim[1] >= 2)
5638                dtim_period = tim[3];
5639
5640        mwl8k_cmd_finalize_join(priv->hw, skb->data, skb->len, dtim_period);
5641
5642        dev_kfree_skb(skb);
5643        priv->beacon_skb = NULL;
5644}
5645
5646enum {
5647        MWL8363 = 0,
5648        MWL8687,
5649        MWL8366,
5650        MWL8764,
5651};
5652
5653#define MWL8K_8366_AP_FW_API 3
5654#define _MWL8K_8366_AP_FW(api) "mwl8k/fmimage_8366_ap-" #api ".fw"
5655#define MWL8K_8366_AP_FW(api) _MWL8K_8366_AP_FW(api)
5656
5657#define MWL8K_8764_AP_FW_API 1
5658#define _MWL8K_8764_AP_FW(api) "mwl8k/fmimage_8764_ap-" #api ".fw"
5659#define MWL8K_8764_AP_FW(api) _MWL8K_8764_AP_FW(api)
5660
5661static struct mwl8k_device_info mwl8k_info_tbl[] = {
5662        [MWL8363] = {
5663                .part_name      = "88w8363",
5664                .helper_image   = "mwl8k/helper_8363.fw",
5665                .fw_image_sta   = "mwl8k/fmimage_8363.fw",
5666        },
5667        [MWL8687] = {
5668                .part_name      = "88w8687",
5669                .helper_image   = "mwl8k/helper_8687.fw",
5670                .fw_image_sta   = "mwl8k/fmimage_8687.fw",
5671        },
5672        [MWL8366] = {
5673                .part_name      = "88w8366",
5674                .helper_image   = "mwl8k/helper_8366.fw",
5675                .fw_image_sta   = "mwl8k/fmimage_8366.fw",
5676                .fw_image_ap    = MWL8K_8366_AP_FW(MWL8K_8366_AP_FW_API),
5677                .fw_api_ap      = MWL8K_8366_AP_FW_API,
5678                .ap_rxd_ops     = &rxd_ap_ops,
5679        },
5680        [MWL8764] = {
5681                .part_name      = "88w8764",
5682                .fw_image_ap    = MWL8K_8764_AP_FW(MWL8K_8764_AP_FW_API),
5683                .fw_api_ap      = MWL8K_8764_AP_FW_API,
5684                .ap_rxd_ops     = &rxd_ap_ops,
5685        },
5686};
5687
5688MODULE_FIRMWARE("mwl8k/helper_8363.fw");
5689MODULE_FIRMWARE("mwl8k/fmimage_8363.fw");
5690MODULE_FIRMWARE("mwl8k/helper_8687.fw");
5691MODULE_FIRMWARE("mwl8k/fmimage_8687.fw");
5692MODULE_FIRMWARE("mwl8k/helper_8366.fw");
5693MODULE_FIRMWARE("mwl8k/fmimage_8366.fw");
5694MODULE_FIRMWARE(MWL8K_8366_AP_FW(MWL8K_8366_AP_FW_API));
5695
5696static const struct pci_device_id mwl8k_pci_id_table[] = {
5697        { PCI_VDEVICE(MARVELL, 0x2a0a), .driver_data = MWL8363, },
5698        { PCI_VDEVICE(MARVELL, 0x2a0c), .driver_data = MWL8363, },
5699        { PCI_VDEVICE(MARVELL, 0x2a24), .driver_data = MWL8363, },
5700        { PCI_VDEVICE(MARVELL, 0x2a2b), .driver_data = MWL8687, },
5701        { PCI_VDEVICE(MARVELL, 0x2a30), .driver_data = MWL8687, },
5702        { PCI_VDEVICE(MARVELL, 0x2a40), .driver_data = MWL8366, },
5703        { PCI_VDEVICE(MARVELL, 0x2a41), .driver_data = MWL8366, },
5704        { PCI_VDEVICE(MARVELL, 0x2a42), .driver_data = MWL8366, },
5705        { PCI_VDEVICE(MARVELL, 0x2a43), .driver_data = MWL8366, },
5706        { PCI_VDEVICE(MARVELL, 0x2b36), .driver_data = MWL8764, },
5707        { },
5708};
5709MODULE_DEVICE_TABLE(pci, mwl8k_pci_id_table);
5710
5711static int mwl8k_request_alt_fw(struct mwl8k_priv *priv)
5712{
5713        int rc;
5714        printk(KERN_ERR "%s: Error requesting preferred fw %s.\n"
5715               "Trying alternative firmware %s\n", pci_name(priv->pdev),
5716               priv->fw_pref, priv->fw_alt);
5717        rc = mwl8k_request_fw(priv, priv->fw_alt, &priv->fw_ucode, true);
5718        if (rc) {
5719                printk(KERN_ERR "%s: Error requesting alt fw %s\n",
5720                       pci_name(priv->pdev), priv->fw_alt);
5721                return rc;
5722        }
5723        return 0;
5724}
5725
5726static int mwl8k_firmware_load_success(struct mwl8k_priv *priv);
5727static void mwl8k_fw_state_machine(const struct firmware *fw, void *context)
5728{
5729        struct mwl8k_priv *priv = context;
5730        struct mwl8k_device_info *di = priv->device_info;
5731        int rc;
5732
5733        switch (priv->fw_state) {
5734        case FW_STATE_INIT:
5735                if (!fw) {
5736                        printk(KERN_ERR "%s: Error requesting helper fw %s\n",
5737                               pci_name(priv->pdev), di->helper_image);
5738                        goto fail;
5739                }
5740                priv->fw_helper = fw;
5741                rc = mwl8k_request_fw(priv, priv->fw_pref, &priv->fw_ucode,
5742                                      true);
5743                if (rc && priv->fw_alt) {
5744                        rc = mwl8k_request_alt_fw(priv);
5745                        if (rc)
5746                                goto fail;
5747                        priv->fw_state = FW_STATE_LOADING_ALT;
5748                } else if (rc)
5749                        goto fail;
5750                else
5751                        priv->fw_state = FW_STATE_LOADING_PREF;
5752                break;
5753
5754        case FW_STATE_LOADING_PREF:
5755                if (!fw) {
5756                        if (priv->fw_alt) {
5757                                rc = mwl8k_request_alt_fw(priv);
5758                                if (rc)
5759                                        goto fail;
5760                                priv->fw_state = FW_STATE_LOADING_ALT;
5761                        } else
5762                                goto fail;
5763                } else {
5764                        priv->fw_ucode = fw;
5765                        rc = mwl8k_firmware_load_success(priv);
5766                        if (rc)
5767                                goto fail;
5768                        else
5769                                complete(&priv->firmware_loading_complete);
5770                }
5771                break;
5772
5773        case FW_STATE_LOADING_ALT:
5774                if (!fw) {
5775                        printk(KERN_ERR "%s: Error requesting alt fw %s\n",
5776                               pci_name(priv->pdev), di->helper_image);
5777                        goto fail;
5778                }
5779                priv->fw_ucode = fw;
5780                rc = mwl8k_firmware_load_success(priv);
5781                if (rc)
5782                        goto fail;
5783                else
5784                        complete(&priv->firmware_loading_complete);
5785                break;
5786
5787        default:
5788                printk(KERN_ERR "%s: Unexpected firmware loading state: %d\n",
5789                       MWL8K_NAME, priv->fw_state);
5790                BUG_ON(1);
5791        }
5792
5793        return;
5794
5795fail:
5796        priv->fw_state = FW_STATE_ERROR;
5797        complete(&priv->firmware_loading_complete);
5798        device_release_driver(&priv->pdev->dev);
5799        mwl8k_release_firmware(priv);
5800}
5801
5802#define MAX_RESTART_ATTEMPTS 1
5803static int mwl8k_init_firmware(struct ieee80211_hw *hw, char *fw_image,
5804                               bool nowait)
5805{
5806        struct mwl8k_priv *priv = hw->priv;
5807        int rc;
5808        int count = MAX_RESTART_ATTEMPTS;
5809
5810retry:
5811        /* Reset firmware and hardware */
5812        mwl8k_hw_reset(priv);
5813
5814        /* Ask userland hotplug daemon for the device firmware */
5815        rc = mwl8k_request_firmware(priv, fw_image, nowait);
5816        if (rc) {
5817                wiphy_err(hw->wiphy, "Firmware files not found\n");
5818                return rc;
5819        }
5820
5821        if (nowait)
5822                return rc;
5823
5824        /* Load firmware into hardware */
5825        rc = mwl8k_load_firmware(hw);
5826        if (rc)
5827                wiphy_err(hw->wiphy, "Cannot start firmware\n");
5828
5829        /* Reclaim memory once firmware is successfully loaded */
5830        mwl8k_release_firmware(priv);
5831
5832        if (rc && count) {
5833                /* FW did not start successfully;
5834                 * lets try one more time
5835                 */
5836                count--;
5837                wiphy_err(hw->wiphy, "Trying to reload the firmware again\n");
5838                msleep(20);
5839                goto retry;
5840        }
5841
5842        return rc;
5843}
5844
5845static int mwl8k_init_txqs(struct ieee80211_hw *hw)
5846{
5847        struct mwl8k_priv *priv = hw->priv;
5848        int rc = 0;
5849        int i;
5850
5851        for (i = 0; i < mwl8k_tx_queues(priv); i++) {
5852                rc = mwl8k_txq_init(hw, i);
5853                if (rc)
5854                        break;
5855                if (priv->ap_fw)
5856                        iowrite32(priv->txq[i].txd_dma,
5857                                  priv->sram + priv->txq_offset[i]);
5858        }
5859        return rc;
5860}
5861
5862/* initialize hw after successfully loading a firmware image */
5863static int mwl8k_probe_hw(struct ieee80211_hw *hw)
5864{
5865        struct mwl8k_priv *priv = hw->priv;
5866        int rc = 0;
5867        int i;
5868
5869        if (priv->ap_fw) {
5870                priv->rxd_ops = priv->device_info->ap_rxd_ops;
5871                if (priv->rxd_ops == NULL) {
5872                        wiphy_err(hw->wiphy,
5873                                  "Driver does not have AP firmware image support for this hardware\n");
5874                        rc = -ENOENT;
5875                        goto err_stop_firmware;
5876                }
5877        } else {
5878                priv->rxd_ops = &rxd_sta_ops;
5879        }
5880
5881        priv->sniffer_enabled = false;
5882        priv->wmm_enabled = false;
5883        priv->pending_tx_pkts = 0;
5884        atomic_set(&priv->watchdog_event_pending, 0);
5885
5886        rc = mwl8k_rxq_init(hw, 0);
5887        if (rc)
5888                goto err_stop_firmware;
5889        rxq_refill(hw, 0, INT_MAX);
5890
5891        /* For the sta firmware, we need to know the dma addresses of tx queues
5892         * before sending MWL8K_CMD_GET_HW_SPEC.  So we must initialize them
5893         * prior to issuing this command.  But for the AP case, we learn the
5894         * total number of queues from the result CMD_GET_HW_SPEC, so for this
5895         * case we must initialize the tx queues after.
5896         */
5897        priv->num_ampdu_queues = 0;
5898        if (!priv->ap_fw) {
5899                rc = mwl8k_init_txqs(hw);
5900                if (rc)
5901                        goto err_free_queues;
5902        }
5903
5904        iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
5905        iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5906        iowrite32(MWL8K_A2H_INT_TX_DONE|MWL8K_A2H_INT_RX_READY|
5907                  MWL8K_A2H_INT_BA_WATCHDOG,
5908                  priv->regs + MWL8K_HIU_A2H_INTERRUPT_CLEAR_SEL);
5909        iowrite32(MWL8K_A2H_INT_OPC_DONE,
5910                  priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
5911
5912        rc = request_irq(priv->pdev->irq, mwl8k_interrupt,
5913                         IRQF_SHARED, MWL8K_NAME, hw);
5914        if (rc) {
5915                wiphy_err(hw->wiphy, "failed to register IRQ handler\n");
5916                goto err_free_queues;
5917        }
5918
5919        /*
5920         * When hw restart is requested,
5921         * mac80211 will take care of clearing
5922         * the ampdu streams, so do not clear
5923         * the ampdu state here
5924         */
5925        if (!priv->hw_restart_in_progress)
5926                memset(priv->ampdu, 0, sizeof(priv->ampdu));
5927
5928        /*
5929         * Temporarily enable interrupts.  Initial firmware host
5930         * commands use interrupts and avoid polling.  Disable
5931         * interrupts when done.
5932         */
5933        iowrite32(MWL8K_A2H_EVENTS, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5934
5935        /* Get config data, mac addrs etc */
5936        if (priv->ap_fw) {
5937                rc = mwl8k_cmd_get_hw_spec_ap(hw);
5938                if (!rc)
5939                        rc = mwl8k_init_txqs(hw);
5940                if (!rc)
5941                        rc = mwl8k_cmd_set_hw_spec(hw);
5942        } else {
5943                rc = mwl8k_cmd_get_hw_spec_sta(hw);
5944        }
5945        if (rc) {
5946                wiphy_err(hw->wiphy, "Cannot initialise firmware\n");
5947                goto err_free_irq;
5948        }
5949
5950        /* Turn radio off */
5951        rc = mwl8k_cmd_radio_disable(hw);
5952        if (rc) {
5953                wiphy_err(hw->wiphy, "Cannot disable\n");
5954                goto err_free_irq;
5955        }
5956
5957        /* Clear MAC address */
5958        rc = mwl8k_cmd_set_mac_addr(hw, NULL, "\x00\x00\x00\x00\x00\x00");
5959        if (rc) {
5960                wiphy_err(hw->wiphy, "Cannot clear MAC address\n");
5961                goto err_free_irq;
5962        }
5963
5964        /* Configure Antennas */
5965        rc = mwl8k_cmd_rf_antenna(hw, MWL8K_RF_ANTENNA_RX, 0x3);
5966        if (rc)
5967                wiphy_warn(hw->wiphy, "failed to set # of RX antennas");
5968        rc = mwl8k_cmd_rf_antenna(hw, MWL8K_RF_ANTENNA_TX, 0x7);
5969        if (rc)
5970                wiphy_warn(hw->wiphy, "failed to set # of TX antennas");
5971
5972
5973        /* Disable interrupts */
5974        iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5975        free_irq(priv->pdev->irq, hw);
5976
5977        wiphy_info(hw->wiphy, "%s v%d, %pm, %s firmware %u.%u.%u.%u\n",
5978                   priv->device_info->part_name,
5979                   priv->hw_rev, hw->wiphy->perm_addr,
5980                   priv->ap_fw ? "AP" : "STA",
5981                   (priv->fw_rev >> 24) & 0xff, (priv->fw_rev >> 16) & 0xff,
5982                   (priv->fw_rev >> 8) & 0xff, priv->fw_rev & 0xff);
5983
5984        return 0;
5985
5986err_free_irq:
5987        iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5988        free_irq(priv->pdev->irq, hw);
5989
5990err_free_queues:
5991        for (i = 0; i < mwl8k_tx_queues(priv); i++)
5992                mwl8k_txq_deinit(hw, i);
5993        mwl8k_rxq_deinit(hw, 0);
5994
5995err_stop_firmware:
5996        mwl8k_hw_reset(priv);
5997
5998        return rc;
5999}
6000
6001/*
6002 * invoke mwl8k_reload_firmware to change the firmware image after the device
6003 * has already been registered
6004 */
6005static int mwl8k_reload_firmware(struct ieee80211_hw *hw, char *fw_image)
6006{
6007        int i, rc = 0;
6008        struct mwl8k_priv *priv = hw->priv;
6009        struct mwl8k_vif *vif, *tmp_vif;
6010
6011        mwl8k_stop(hw);
6012        mwl8k_rxq_deinit(hw, 0);
6013
6014        /*
6015         * All the existing interfaces are re-added by the ieee80211_reconfig;
6016         * which means driver should remove existing interfaces before calling
6017         * ieee80211_restart_hw
6018         */
6019        if (priv->hw_restart_in_progress)
6020                list_for_each_entry_safe(vif, tmp_vif, &priv->vif_list, list)
6021                        mwl8k_remove_vif(priv, vif);
6022
6023        for (i = 0; i < mwl8k_tx_queues(priv); i++)
6024                mwl8k_txq_deinit(hw, i);
6025
6026        rc = mwl8k_init_firmware(hw, fw_image, false);
6027        if (rc)
6028                goto fail;
6029
6030        rc = mwl8k_probe_hw(hw);
6031        if (rc)
6032                goto fail;
6033
6034        if (priv->hw_restart_in_progress)
6035                return rc;
6036
6037        rc = mwl8k_start(hw);
6038        if (rc)
6039                goto fail;
6040
6041        rc = mwl8k_config(hw, ~0);
6042        if (rc)
6043                goto fail;
6044
6045        for (i = 0; i < MWL8K_TX_WMM_QUEUES; i++) {
6046                rc = mwl8k_conf_tx(hw, NULL, i, &priv->wmm_params[i]);
6047                if (rc)
6048                        goto fail;
6049        }
6050
6051        return rc;
6052
6053fail:
6054        printk(KERN_WARNING "mwl8k: Failed to reload firmware image.\n");
6055        return rc;
6056}
6057
6058static const struct ieee80211_iface_limit ap_if_limits[] = {
6059        { .max = 8,     .types = BIT(NL80211_IFTYPE_AP) },
6060        { .max = 1,     .types = BIT(NL80211_IFTYPE_STATION) },
6061};
6062
6063static const struct ieee80211_iface_combination ap_if_comb = {
6064        .limits = ap_if_limits,
6065        .n_limits = ARRAY_SIZE(ap_if_limits),
6066        .max_interfaces = 8,
6067        .num_different_channels = 1,
6068};
6069
6070
6071static int mwl8k_firmware_load_success(struct mwl8k_priv *priv)
6072{
6073        struct ieee80211_hw *hw = priv->hw;
6074        int i, rc;
6075
6076        rc = mwl8k_load_firmware(hw);
6077        mwl8k_release_firmware(priv);
6078        if (rc) {
6079                wiphy_err(hw->wiphy, "Cannot start firmware\n");
6080                return rc;
6081        }
6082
6083        /*
6084         * Extra headroom is the size of the required DMA header
6085         * minus the size of the smallest 802.11 frame (CTS frame).
6086         */
6087        hw->extra_tx_headroom =
6088                sizeof(struct mwl8k_dma_data) - sizeof(struct ieee80211_cts);
6089
6090        hw->extra_tx_headroom -= priv->ap_fw ? REDUCED_TX_HEADROOM : 0;
6091
6092        hw->queues = MWL8K_TX_WMM_QUEUES;
6093
6094        /* Set rssi values to dBm */
6095        ieee80211_hw_set(hw, SIGNAL_DBM);
6096        ieee80211_hw_set(hw, HAS_RATE_CONTROL);
6097
6098        /*
6099         * Ask mac80211 to not to trigger PS mode
6100         * based on PM bit of incoming frames.
6101         */
6102        if (priv->ap_fw)
6103                ieee80211_hw_set(hw, AP_LINK_PS);
6104
6105        hw->vif_data_size = sizeof(struct mwl8k_vif);
6106        hw->sta_data_size = sizeof(struct mwl8k_sta);
6107
6108        priv->macids_used = 0;
6109        INIT_LIST_HEAD(&priv->vif_list);
6110
6111        /* Set default radio state and preamble */
6112        priv->radio_on = false;
6113        priv->radio_short_preamble = false;
6114
6115        /* Finalize join worker */
6116        INIT_WORK(&priv->finalize_join_worker, mwl8k_finalize_join_worker);
6117        /* Handle watchdog ba events */
6118        INIT_WORK(&priv->watchdog_ba_handle, mwl8k_watchdog_ba_events);
6119        /* To reload the firmware if it crashes */
6120        INIT_WORK(&priv->fw_reload, mwl8k_hw_restart_work);
6121
6122        /* TX reclaim and RX tasklets.  */
6123        tasklet_init(&priv->poll_tx_task, mwl8k_tx_poll, (unsigned long)hw);
6124        tasklet_disable(&priv->poll_tx_task);
6125        tasklet_init(&priv->poll_rx_task, mwl8k_rx_poll, (unsigned long)hw);
6126        tasklet_disable(&priv->poll_rx_task);
6127
6128        /* Power management cookie */
6129        priv->cookie = pci_alloc_consistent(priv->pdev, 4, &priv->cookie_dma);
6130        if (priv->cookie == NULL)
6131                return -ENOMEM;
6132
6133        mutex_init(&priv->fw_mutex);
6134        priv->fw_mutex_owner = NULL;
6135        priv->fw_mutex_depth = 0;
6136        priv->hostcmd_wait = NULL;
6137
6138        spin_lock_init(&priv->tx_lock);
6139
6140        spin_lock_init(&priv->stream_lock);
6141
6142        priv->tx_wait = NULL;
6143
6144        rc = mwl8k_probe_hw(hw);
6145        if (rc)
6146                goto err_free_cookie;
6147
6148        hw->wiphy->interface_modes = 0;
6149
6150        if (priv->ap_macids_supported || priv->device_info->fw_image_ap) {
6151                hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP);
6152                hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_STATION);
6153                hw->wiphy->iface_combinations = &ap_if_comb;
6154                hw->wiphy->n_iface_combinations = 1;
6155        }
6156
6157        if (priv->sta_macids_supported || priv->device_info->fw_image_sta)
6158                hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_STATION);
6159
6160        wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
6161
6162        rc = ieee80211_register_hw(hw);
6163        if (rc) {
6164                wiphy_err(hw->wiphy, "Cannot register device\n");
6165                goto err_unprobe_hw;
6166        }
6167
6168        return 0;
6169
6170err_unprobe_hw:
6171        for (i = 0; i < mwl8k_tx_queues(priv); i++)
6172                mwl8k_txq_deinit(hw, i);
6173        mwl8k_rxq_deinit(hw, 0);
6174
6175err_free_cookie:
6176        if (priv->cookie != NULL)
6177                pci_free_consistent(priv->pdev, 4,
6178                                priv->cookie, priv->cookie_dma);
6179
6180        return rc;
6181}
6182static int mwl8k_probe(struct pci_dev *pdev,
6183                                 const struct pci_device_id *id)
6184{
6185        static int printed_version;
6186        struct ieee80211_hw *hw;
6187        struct mwl8k_priv *priv;
6188        struct mwl8k_device_info *di;
6189        int rc;
6190
6191        if (!printed_version) {
6192                printk(KERN_INFO "%s version %s\n", MWL8K_DESC, MWL8K_VERSION);
6193                printed_version = 1;
6194        }
6195
6196
6197        rc = pci_enable_device(pdev);
6198        if (rc) {
6199                printk(KERN_ERR "%s: Cannot enable new PCI device\n",
6200                       MWL8K_NAME);
6201                return rc;
6202        }
6203
6204        rc = pci_request_regions(pdev, MWL8K_NAME);
6205        if (rc) {
6206                printk(KERN_ERR "%s: Cannot obtain PCI resources\n",
6207                       MWL8K_NAME);
6208                goto err_disable_device;
6209        }
6210
6211        pci_set_master(pdev);
6212
6213
6214        hw = ieee80211_alloc_hw(sizeof(*priv), &mwl8k_ops);
6215        if (hw == NULL) {
6216                printk(KERN_ERR "%s: ieee80211 alloc failed\n", MWL8K_NAME);
6217                rc = -ENOMEM;
6218                goto err_free_reg;
6219        }
6220
6221        SET_IEEE80211_DEV(hw, &pdev->dev);
6222        pci_set_drvdata(pdev, hw);
6223
6224        priv = hw->priv;
6225        priv->hw = hw;
6226        priv->pdev = pdev;
6227        priv->device_info = &mwl8k_info_tbl[id->driver_data];
6228
6229        if (id->driver_data == MWL8764)
6230                priv->is_8764 = true;
6231
6232        priv->sram = pci_iomap(pdev, 0, 0x10000);
6233        if (priv->sram == NULL) {
6234                wiphy_err(hw->wiphy, "Cannot map device SRAM\n");
6235                rc = -EIO;
6236                goto err_iounmap;
6237        }
6238
6239        /*
6240         * If BAR0 is a 32 bit BAR, the register BAR will be BAR1.
6241         * If BAR0 is a 64 bit BAR, the register BAR will be BAR2.
6242         */
6243        priv->regs = pci_iomap(pdev, 1, 0x10000);
6244        if (priv->regs == NULL) {
6245                priv->regs = pci_iomap(pdev, 2, 0x10000);
6246                if (priv->regs == NULL) {
6247                        wiphy_err(hw->wiphy, "Cannot map device registers\n");
6248                        rc = -EIO;
6249                        goto err_iounmap;
6250                }
6251        }
6252
6253        /*
6254         * Choose the initial fw image depending on user input.  If a second
6255         * image is available, make it the alternative image that will be
6256         * loaded if the first one fails.
6257         */
6258        init_completion(&priv->firmware_loading_complete);
6259        di = priv->device_info;
6260        if (ap_mode_default && di->fw_image_ap) {
6261                priv->fw_pref = di->fw_image_ap;
6262                priv->fw_alt = di->fw_image_sta;
6263        } else if (!ap_mode_default && di->fw_image_sta) {
6264                priv->fw_pref = di->fw_image_sta;
6265                priv->fw_alt = di->fw_image_ap;
6266        } else if (ap_mode_default && !di->fw_image_ap && di->fw_image_sta) {
6267                printk(KERN_WARNING "AP fw is unavailable.  Using STA fw.");
6268                priv->fw_pref = di->fw_image_sta;
6269        } else if (!ap_mode_default && !di->fw_image_sta && di->fw_image_ap) {
6270                printk(KERN_WARNING "STA fw is unavailable.  Using AP fw.");
6271                priv->fw_pref = di->fw_image_ap;
6272        }
6273        rc = mwl8k_init_firmware(hw, priv->fw_pref, true);
6274        if (rc)
6275                goto err_stop_firmware;
6276
6277        priv->hw_restart_in_progress = false;
6278
6279        priv->running_bsses = 0;
6280
6281        return rc;
6282
6283err_stop_firmware:
6284        mwl8k_hw_reset(priv);
6285
6286err_iounmap:
6287        if (priv->regs != NULL)
6288                pci_iounmap(pdev, priv->regs);
6289
6290        if (priv->sram != NULL)
6291                pci_iounmap(pdev, priv->sram);
6292
6293        ieee80211_free_hw(hw);
6294
6295err_free_reg:
6296        pci_release_regions(pdev);
6297
6298err_disable_device:
6299        pci_disable_device(pdev);
6300
6301        return rc;
6302}
6303
6304static void mwl8k_remove(struct pci_dev *pdev)
6305{
6306        struct ieee80211_hw *hw = pci_get_drvdata(pdev);
6307        struct mwl8k_priv *priv;
6308        int i;
6309
6310        if (hw == NULL)
6311                return;
6312        priv = hw->priv;
6313
6314        wait_for_completion(&priv->firmware_loading_complete);
6315
6316        if (priv->fw_state == FW_STATE_ERROR) {
6317                mwl8k_hw_reset(priv);
6318                goto unmap;
6319        }
6320
6321        ieee80211_stop_queues(hw);
6322
6323        ieee80211_unregister_hw(hw);
6324
6325        /* Remove TX reclaim and RX tasklets.  */
6326        tasklet_kill(&priv->poll_tx_task);
6327        tasklet_kill(&priv->poll_rx_task);
6328
6329        /* Stop hardware */
6330        mwl8k_hw_reset(priv);
6331
6332        /* Return all skbs to mac80211 */
6333        for (i = 0; i < mwl8k_tx_queues(priv); i++)
6334                mwl8k_txq_reclaim(hw, i, INT_MAX, 1);
6335
6336        for (i = 0; i < mwl8k_tx_queues(priv); i++)
6337                mwl8k_txq_deinit(hw, i);
6338
6339        mwl8k_rxq_deinit(hw, 0);
6340
6341        pci_free_consistent(priv->pdev, 4, priv->cookie, priv->cookie_dma);
6342
6343unmap:
6344        pci_iounmap(pdev, priv->regs);
6345        pci_iounmap(pdev, priv->sram);
6346        ieee80211_free_hw(hw);
6347        pci_release_regions(pdev);
6348        pci_disable_device(pdev);
6349}
6350
6351static struct pci_driver mwl8k_driver = {
6352        .name           = MWL8K_NAME,
6353        .id_table       = mwl8k_pci_id_table,
6354        .probe          = mwl8k_probe,
6355        .remove         = mwl8k_remove,
6356};
6357
6358module_pci_driver(mwl8k_driver);
6359
6360MODULE_DESCRIPTION(MWL8K_DESC);
6361MODULE_VERSION(MWL8K_VERSION);
6362MODULE_AUTHOR("Lennert Buytenhek <buytenh@marvell.com>");
6363MODULE_LICENSE("GPL");
6364