drivers/net/wireless/marvell/mwl8k.c

   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 */
  33 static bool ap_mode_default;
  34 module_param(ap_mode_default, bool, 0);
  35 MODULE_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
 120 struct 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
 128 struct 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
 137 struct 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
 154 struct 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
 167 enum {
 168         AMPDU_NO_STREAM,
 169         AMPDU_STREAM_NEW,
 170         AMPDU_STREAM_IN_PROGRESS,
 171         AMPDU_STREAM_ACTIVE,
 172 };
 173
 174 struct mwl8k_ampdu_stream {
 175         struct ieee80211_sta *sta;
 176         u8 tid;
 177         u8 state;
 178         u8 idx;
 179 };
 180
 181 struct 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 */
 309 struct 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
 334 struct tx_traffic_info {
 335         u32 start_time;
 336         u32 pkts;
 337 };
 338
 339 #define MWL8K_MAX_TID 8
 340 struct 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
 348 static 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
 365 static 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
 381 static 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
 393 static 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
 447 static 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 */
 496 static 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 */
 506 static void mwl8k_release_fw(const struct firmware **fw)
 507 {
 508         if (*fw == NULL)
 509                 return;
 510         release_firmware(*fw);
 511         *fw = NULL;
 512 }
 513
 514 static 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 */
 521 static void mwl8k_fw_state_machine(const struct firmware *fw, void *context);
 522 enum {
 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 */
 530 static 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
 546 static 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
 589 struct mwl8k_cmd_pkt {
 590         /* New members MUST be added within the __struct_group() macro below. */
 591         __struct_group(mwl8k_cmd_pkt_hdr, hdr, __packed,
 592                 __le16  code;
 593                 __le16  length;
 594                 __u8    seq_num;
 595                 __u8    macid;
 596                 __le16  result;
 597         );
 598         char payload[];
 599 } __packed;
 600 static_assert(offsetof(struct mwl8k_cmd_pkt, payload) == sizeof(struct mwl8k_cmd_pkt_hdr),
 601               "struct member likely outside of __struct_group()");
 602
 603 /*
 604  * Firmware loading.
 605  */
 606 static int
 607 mwl8k_send_fw_load_cmd(struct mwl8k_priv *priv, void *data, int length)
 608 {
 609         void __iomem *regs = priv->regs;
 610         dma_addr_t dma_addr;
 611         int loops;
 612
 613         dma_addr = dma_map_single(&priv->pdev->dev, data, length,
 614                                   DMA_TO_DEVICE);
 615         if (dma_mapping_error(&priv->pdev->dev, dma_addr))
 616                 return -ENOMEM;
 617
 618         iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR);
 619         iowrite32(0, regs + MWL8K_HIU_INT_CODE);
 620         iowrite32(MWL8K_H2A_INT_DOORBELL,
 621                 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
 622         iowrite32(MWL8K_H2A_INT_DUMMY,
 623                 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
 624
 625         loops = 1000;
 626         do {
 627                 u32 int_code;
 628                 if (priv->is_8764) {
 629                         int_code = ioread32(regs +
 630                                             MWL8K_HIU_H2A_INTERRUPT_STATUS);
 631                         if (int_code == 0)
 632                                 break;
 633                 } else {
 634                         int_code = ioread32(regs + MWL8K_HIU_INT_CODE);
 635                         if (int_code == MWL8K_INT_CODE_CMD_FINISHED) {
 636                                 iowrite32(0, regs + MWL8K_HIU_INT_CODE);
 637                                 break;
 638                         }
 639                 }
 640                 cond_resched();
 641                 udelay(1);
 642         } while (--loops);
 643
 644         dma_unmap_single(&priv->pdev->dev, dma_addr, length, DMA_TO_DEVICE);
 645
 646         return loops ? 0 : -ETIMEDOUT;
 647 }
 648
 649 static int mwl8k_load_fw_image(struct mwl8k_priv *priv,
 650                                 const u8 *data, size_t length)
 651 {
 652         struct mwl8k_cmd_pkt *cmd;
 653         int done;
 654         int rc = 0;
 655
 656         cmd = kmalloc(sizeof(*cmd) + 256, GFP_KERNEL);
 657         if (cmd == NULL)
 658                 return -ENOMEM;
 659
 660         cmd->code = cpu_to_le16(MWL8K_CMD_CODE_DNLD);
 661         cmd->seq_num = 0;
 662         cmd->macid = 0;
 663         cmd->result = 0;
 664
 665         done = 0;
 666         while (length) {
 667                 int block_size = length > 256 ? 256 : length;
 668
 669                 memcpy(cmd->payload, data + done, block_size);
 670                 cmd->length = cpu_to_le16(block_size);
 671
 672                 rc = mwl8k_send_fw_load_cmd(priv, cmd,
 673                                                 sizeof(*cmd) + block_size);
 674                 if (rc)
 675                         break;
 676
 677                 done += block_size;
 678                 length -= block_size;
 679         }
 680
 681         if (!rc) {
 682                 cmd->length = 0;
 683                 rc = mwl8k_send_fw_load_cmd(priv, cmd, sizeof(*cmd));
 684         }
 685
 686         kfree(cmd);
 687
 688         return rc;
 689 }
 690
 691 static int mwl8k_feed_fw_image(struct mwl8k_priv *priv,
 692                                 const u8 *data, size_t length)
 693 {
 694         unsigned char *buffer;
 695         int may_continue, rc = 0;
 696         u32 done, prev_block_size;
 697
 698         buffer = kmalloc(1024, GFP_KERNEL);
 699         if (buffer == NULL)
 700                 return -ENOMEM;
 701
 702         done = 0;
 703         prev_block_size = 0;
 704         may_continue = 1000;
 705         while (may_continue > 0) {
 706                 u32 block_size;
 707
 708                 block_size = ioread32(priv->regs + MWL8K_HIU_SCRATCH);
 709                 if (block_size & 1) {
 710                         block_size &= ~1;
 711                         may_continue--;
 712                 } else {
 713                         done += prev_block_size;
 714                         length -= prev_block_size;
 715                 }
 716
 717                 if (block_size > 1024 || block_size > length) {
 718                         rc = -EOVERFLOW;
 719                         break;
 720                 }
 721
 722                 if (length == 0) {
 723                         rc = 0;
 724                         break;
 725                 }
 726
 727                 if (block_size == 0) {
 728                         rc = -EPROTO;
 729                         may_continue--;
 730                         udelay(1);
 731                         continue;
 732                 }
 733
 734                 prev_block_size = block_size;
 735                 memcpy(buffer, data + done, block_size);
 736
 737                 rc = mwl8k_send_fw_load_cmd(priv, buffer, block_size);
 738                 if (rc)
 739                         break;
 740         }
 741
 742         if (!rc && length != 0)
 743                 rc = -EREMOTEIO;
 744
 745         kfree(buffer);
 746
 747         return rc;
 748 }
 749
 750 static int mwl8k_load_firmware(struct ieee80211_hw *hw)
 751 {
 752         struct mwl8k_priv *priv = hw->priv;
 753         const struct firmware *fw = priv->fw_ucode;
 754         int rc;
 755         int loops;
 756
 757         if (!memcmp(fw->data, "\x01\x00\x00\x00", 4) && !priv->is_8764) {
 758                 const struct firmware *helper = priv->fw_helper;
 759
 760                 if (helper == NULL) {
 761                         printk(KERN_ERR "%s: helper image needed but none "
 762                                "given\n", pci_name(priv->pdev));
 763                         return -EINVAL;
 764                 }
 765
 766                 rc = mwl8k_load_fw_image(priv, helper->data, helper->size);
 767                 if (rc) {
 768                         printk(KERN_ERR "%s: unable to load firmware "
 769                                "helper image\n", pci_name(priv->pdev));
 770                         return rc;
 771                 }
 772                 msleep(20);
 773
 774                 rc = mwl8k_feed_fw_image(priv, fw->data, fw->size);
 775         } else {
 776                 if (priv->is_8764)
 777                         rc = mwl8k_feed_fw_image(priv, fw->data, fw->size);
 778                 else
 779                         rc = mwl8k_load_fw_image(priv, fw->data, fw->size);
 780         }
 781
 782         if (rc) {
 783                 printk(KERN_ERR "%s: unable to load firmware image\n",
 784                        pci_name(priv->pdev));
 785                 return rc;
 786         }
 787
 788         iowrite32(MWL8K_MODE_STA, priv->regs + MWL8K_HIU_GEN_PTR);
 789
 790         loops = 500000;
 791         do {
 792                 u32 ready_code;
 793
 794                 ready_code = ioread32(priv->regs + MWL8K_HIU_INT_CODE);
 795                 if (ready_code == MWL8K_FWAP_READY) {
 796                         priv->ap_fw = true;
 797                         break;
 798                 } else if (ready_code == MWL8K_FWSTA_READY) {
 799                         priv->ap_fw = false;
 800                         break;
 801                 }
 802
 803                 cond_resched();
 804                 udelay(1);
 805         } while (--loops);
 806
 807         return loops ? 0 : -ETIMEDOUT;
 808 }
 809
 810
 811 /* DMA header used by firmware and hardware.  */
 812 struct mwl8k_dma_data {
 813         __le16 fwlen;
 814         struct ieee80211_hdr wh;
 815         char data[];
 816 } __packed __aligned(2);
 817
 818 /* Routines to add/remove DMA header from skb.  */
 819 static inline void mwl8k_remove_dma_header(struct sk_buff *skb, __le16 qos)
 820 {
 821         struct mwl8k_dma_data *tr;
 822         int hdrlen;
 823
 824         tr = (struct mwl8k_dma_data *)skb->data;
 825         hdrlen = ieee80211_hdrlen(tr->wh.frame_control);
 826
 827         if (hdrlen != sizeof(tr->wh)) {
 828                 if (ieee80211_is_data_qos(tr->wh.frame_control)) {
 829                         memmove(tr->data - hdrlen, &tr->wh, hdrlen - 2);
 830                         *((__le16 *)(tr->data - 2)) = qos;
 831                 } else {
 832                         memmove(tr->data - hdrlen, &tr->wh, hdrlen);
 833                 }
 834         }
 835
 836         if (hdrlen != sizeof(*tr))
 837                 skb_pull(skb, sizeof(*tr) - hdrlen);
 838 }
 839
 840 #define REDUCED_TX_HEADROOM     8
 841
 842 static void
 843 mwl8k_add_dma_header(struct mwl8k_priv *priv, struct sk_buff *skb,
 844                                                 int head_pad, int tail_pad)
 845 {
 846         struct ieee80211_hdr *wh;
 847         int hdrlen;
 848         int reqd_hdrlen;
 849         struct mwl8k_dma_data *tr;
 850
 851         /*
 852          * Add a firmware DMA header; the firmware requires that we
 853          * present a 2-byte payload length followed by a 4-address
 854          * header (without QoS field), followed (optionally) by any
 855          * WEP/ExtIV header (but only filled in for CCMP).
 856          */
 857         wh = (struct ieee80211_hdr *)skb->data;
 858
 859         hdrlen = ieee80211_hdrlen(wh->frame_control);
 860
 861         /*
 862          * Check if skb_resize is required because of
 863          * tx_headroom adjustment.
 864          */
 865         if (priv->ap_fw && (hdrlen < (sizeof(struct ieee80211_cts)
 866                                                 + REDUCED_TX_HEADROOM))) {
 867                 if (pskb_expand_head(skb, REDUCED_TX_HEADROOM, 0, GFP_ATOMIC)) {
 868
 869                         wiphy_err(priv->hw->wiphy,
 870                                         "Failed to reallocate TX buffer\n");
 871                         return;
 872                 }
 873                 skb->truesize += REDUCED_TX_HEADROOM;
 874         }
 875
 876         reqd_hdrlen = sizeof(*tr) + head_pad;
 877
 878         if (hdrlen != reqd_hdrlen)
 879                 skb_push(skb, reqd_hdrlen - hdrlen);
 880
 881         if (ieee80211_is_data_qos(wh->frame_control))
 882                 hdrlen -= IEEE80211_QOS_CTL_LEN;
 883
 884         tr = (struct mwl8k_dma_data *)skb->data;
 885         if (wh != &tr->wh)
 886                 memmove(&tr->wh, wh, hdrlen);
 887         if (hdrlen != sizeof(tr->wh))
 888                 memset(((void *)&tr->wh) + hdrlen, 0, sizeof(tr->wh) - hdrlen);
 889
 890         /*
 891          * Firmware length is the length of the fully formed "802.11
 892          * payload".  That is, everything except for the 802.11 header.
 893          * This includes all crypto material including the MIC.
 894          */
 895         tr->fwlen = cpu_to_le16(skb->len - sizeof(*tr) + tail_pad);
 896 }
 897
 898 static void mwl8k_encapsulate_tx_frame(struct mwl8k_priv *priv,
 899                 struct sk_buff *skb)
 900 {
 901         struct ieee80211_hdr *wh;
 902         struct ieee80211_tx_info *tx_info;
 903         struct ieee80211_key_conf *key_conf;
 904         int data_pad;
 905         int head_pad = 0;
 906
 907         wh = (struct ieee80211_hdr *)skb->data;
 908
 909         tx_info = IEEE80211_SKB_CB(skb);
 910
 911         key_conf = NULL;
 912         if (ieee80211_is_data(wh->frame_control))
 913                 key_conf = tx_info->control.hw_key;
 914
 915         /*
 916          * Make sure the packet header is in the DMA header format (4-address
 917          * without QoS), and add head & tail padding when HW crypto is enabled.
 918          *
 919          * We have the following trailer padding requirements:
 920          * - WEP: 4 trailer bytes (ICV)
 921          * - TKIP: 12 trailer bytes (8 MIC + 4 ICV)
 922          * - CCMP: 8 trailer bytes (MIC)
 923          */
 924         data_pad = 0;
 925         if (key_conf != NULL) {
 926                 head_pad = key_conf->iv_len;
 927                 switch (key_conf->cipher) {
 928                 case WLAN_CIPHER_SUITE_WEP40:
 929                 case WLAN_CIPHER_SUITE_WEP104:
 930                         data_pad = 4;
 931                         break;
 932                 case WLAN_CIPHER_SUITE_TKIP:
 933                         data_pad = 12;
 934                         break;
 935                 case WLAN_CIPHER_SUITE_CCMP:
 936                         data_pad = 8;
 937                         break;
 938                 }
 939         }
 940         mwl8k_add_dma_header(priv, skb, head_pad, data_pad);
 941 }
 942
 943 /*
 944  * Packet reception for 88w8366/88w8764 AP firmware.
 945  */
 946 struct mwl8k_rxd_ap {
 947         __le16 pkt_len;
 948         __u8 sq2;
 949         __u8 rate;
 950         __le32 pkt_phys_addr;
 951         __le32 next_rxd_phys_addr;
 952         __le16 qos_control;
 953         __le16 htsig2;
 954         __le32 hw_rssi_info;
 955         __le32 hw_noise_floor_info;
 956         __u8 noise_floor;
 957         __u8 pad0[3];
 958         __u8 rssi;
 959         __u8 rx_status;
 960         __u8 channel;
 961         __u8 rx_ctrl;
 962 } __packed;
 963
 964 #define MWL8K_AP_RATE_INFO_MCS_FORMAT           0x80
 965 #define MWL8K_AP_RATE_INFO_40MHZ                0x40
 966 #define MWL8K_AP_RATE_INFO_RATEID(x)            ((x) & 0x3f)
 967
 968 #define MWL8K_AP_RX_CTRL_OWNED_BY_HOST          0x80
 969
 970 /* 8366/8764 AP rx_status bits */
 971 #define MWL8K_AP_RXSTAT_DECRYPT_ERR_MASK                0x80
 972 #define MWL8K_AP_RXSTAT_GENERAL_DECRYPT_ERR             0xFF
 973 #define MWL8K_AP_RXSTAT_TKIP_DECRYPT_MIC_ERR            0x02
 974 #define MWL8K_AP_RXSTAT_WEP_DECRYPT_ICV_ERR             0x04
 975 #define MWL8K_AP_RXSTAT_TKIP_DECRYPT_ICV_ERR            0x08
 976
 977 static void mwl8k_rxd_ap_init(void *_rxd, dma_addr_t next_dma_addr)
 978 {
 979         struct mwl8k_rxd_ap *rxd = _rxd;
 980
 981         rxd->next_rxd_phys_addr = cpu_to_le32(next_dma_addr);
 982         rxd->rx_ctrl = MWL8K_AP_RX_CTRL_OWNED_BY_HOST;
 983 }
 984
 985 static void mwl8k_rxd_ap_refill(void *_rxd, dma_addr_t addr, int len)
 986 {
 987         struct mwl8k_rxd_ap *rxd = _rxd;
 988
 989         rxd->pkt_len = cpu_to_le16(len);
 990         rxd->pkt_phys_addr = cpu_to_le32(addr);
 991         wmb();
 992         rxd->rx_ctrl = 0;
 993 }
 994
 995 static int
 996 mwl8k_rxd_ap_process(void *_rxd, struct ieee80211_rx_status *status,
 997                      __le16 *qos, s8 *noise)
 998 {
 999         struct mwl8k_rxd_ap *rxd = _rxd;
1000
1001         if (!(rxd->rx_ctrl & MWL8K_AP_RX_CTRL_OWNED_BY_HOST))
1002                 return -1;
1003         rmb();
1004
1005         memset(status, 0, sizeof(*status));
1006
1007         status->signal = -rxd->rssi;
1008         *noise = -rxd->noise_floor;
1009
1010         if (rxd->rate & MWL8K_AP_RATE_INFO_MCS_FORMAT) {
1011                 status->encoding = RX_ENC_HT;
1012                 if (rxd->rate & MWL8K_AP_RATE_INFO_40MHZ)
1013                         status->bw = RATE_INFO_BW_40;
1014                 status->rate_idx = MWL8K_AP_RATE_INFO_RATEID(rxd->rate);
1015         } else {
1016                 int i;
1017
1018                 for (i = 0; i < ARRAY_SIZE(mwl8k_rates_24); i++) {
1019                         if (mwl8k_rates_24[i].hw_value == rxd->rate) {
1020                                 status->rate_idx = i;
1021                                 break;
1022                         }
1023                 }
1024         }
1025
1026         if (rxd->channel > 14) {
1027                 status->band = NL80211_BAND_5GHZ;
1028                 if (!(status->encoding == RX_ENC_HT) &&
1029                     status->rate_idx >= MWL8K_LEGACY_5G_RATE_OFFSET)
1030                         status->rate_idx -= MWL8K_LEGACY_5G_RATE_OFFSET;
1031         } else {
1032                 status->band = NL80211_BAND_2GHZ;
1033         }
1034         status->freq = ieee80211_channel_to_frequency(rxd->channel,
1035                                                       status->band);
1036
1037         *qos = rxd->qos_control;
1038
1039         if ((rxd->rx_status != MWL8K_AP_RXSTAT_GENERAL_DECRYPT_ERR) &&
1040             (rxd->rx_status & MWL8K_AP_RXSTAT_DECRYPT_ERR_MASK) &&
1041             (rxd->rx_status & MWL8K_AP_RXSTAT_TKIP_DECRYPT_MIC_ERR))
1042                 status->flag |= RX_FLAG_MMIC_ERROR;
1043
1044         return le16_to_cpu(rxd->pkt_len);
1045 }
1046
1047 static struct rxd_ops rxd_ap_ops = {
1048         .rxd_size       = sizeof(struct mwl8k_rxd_ap),
1049         .rxd_init       = mwl8k_rxd_ap_init,
1050         .rxd_refill     = mwl8k_rxd_ap_refill,
1051         .rxd_process    = mwl8k_rxd_ap_process,
1052 };
1053
1054 /*
1055  * Packet reception for STA firmware.
1056  */
1057 struct mwl8k_rxd_sta {
1058         __le16 pkt_len;
1059         __u8 link_quality;
1060         __u8 noise_level;
1061         __le32 pkt_phys_addr;
1062         __le32 next_rxd_phys_addr;
1063         __le16 qos_control;
1064         __le16 rate_info;
1065         __le32 pad0[4];
1066         __u8 rssi;
1067         __u8 channel;
1068         __le16 pad1;
1069         __u8 rx_ctrl;
1070         __u8 rx_status;
1071         __u8 pad2[2];
1072 } __packed;
1073
1074 #define MWL8K_STA_RATE_INFO_SHORTPRE            0x8000
1075 #define MWL8K_STA_RATE_INFO_ANTSELECT(x)        (((x) >> 11) & 0x3)
1076 #define MWL8K_STA_RATE_INFO_RATEID(x)           (((x) >> 3) & 0x3f)
1077 #define MWL8K_STA_RATE_INFO_40MHZ               0x0004
1078 #define MWL8K_STA_RATE_INFO_SHORTGI             0x0002
1079 #define MWL8K_STA_RATE_INFO_MCS_FORMAT          0x0001
1080
1081 #define MWL8K_STA_RX_CTRL_OWNED_BY_HOST         0x02
1082 #define MWL8K_STA_RX_CTRL_DECRYPT_ERROR         0x04
1083 /* ICV=0 or MIC=1 */
1084 #define MWL8K_STA_RX_CTRL_DEC_ERR_TYPE          0x08
1085 /* Key is uploaded only in failure case */
1086 #define MWL8K_STA_RX_CTRL_KEY_INDEX                     0x30
1087
1088 static void mwl8k_rxd_sta_init(void *_rxd, dma_addr_t next_dma_addr)
1089 {
1090         struct mwl8k_rxd_sta *rxd = _rxd;
1091
1092         rxd->next_rxd_phys_addr = cpu_to_le32(next_dma_addr);
1093         rxd->rx_ctrl = MWL8K_STA_RX_CTRL_OWNED_BY_HOST;
1094 }
1095
1096 static void mwl8k_rxd_sta_refill(void *_rxd, dma_addr_t addr, int len)
1097 {
1098         struct mwl8k_rxd_sta *rxd = _rxd;
1099
1100         rxd->pkt_len = cpu_to_le16(len);
1101         rxd->pkt_phys_addr = cpu_to_le32(addr);
1102         wmb();
1103         rxd->rx_ctrl = 0;
1104 }
1105
1106 static int
1107 mwl8k_rxd_sta_process(void *_rxd, struct ieee80211_rx_status *status,
1108                        __le16 *qos, s8 *noise)
1109 {
1110         struct mwl8k_rxd_sta *rxd = _rxd;
1111         u16 rate_info;
1112
1113         if (!(rxd->rx_ctrl & MWL8K_STA_RX_CTRL_OWNED_BY_HOST))
1114                 return -1;
1115         rmb();
1116
1117         rate_info = le16_to_cpu(rxd->rate_info);
1118
1119         memset(status, 0, sizeof(*status));
1120
1121         status->signal = -rxd->rssi;
1122         *noise = -rxd->noise_level;
1123         status->antenna = MWL8K_STA_RATE_INFO_ANTSELECT(rate_info);
1124         status->rate_idx = MWL8K_STA_RATE_INFO_RATEID(rate_info);
1125
1126         if (rate_info & MWL8K_STA_RATE_INFO_SHORTPRE)
1127                 status->enc_flags |= RX_ENC_FLAG_SHORTPRE;
1128         if (rate_info & MWL8K_STA_RATE_INFO_40MHZ)
1129                 status->bw = RATE_INFO_BW_40;
1130         if (rate_info & MWL8K_STA_RATE_INFO_SHORTGI)
1131                 status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
1132         if (rate_info & MWL8K_STA_RATE_INFO_MCS_FORMAT)
1133                 status->encoding = RX_ENC_HT;
1134
1135         if (rxd->channel > 14) {
1136                 status->band = NL80211_BAND_5GHZ;
1137                 if (!(status->encoding == RX_ENC_HT) &&
1138                     status->rate_idx >= MWL8K_LEGACY_5G_RATE_OFFSET)
1139                         status->rate_idx -= MWL8K_LEGACY_5G_RATE_OFFSET;
1140         } else {
1141                 status->band = NL80211_BAND_2GHZ;
1142         }
1143         status->freq = ieee80211_channel_to_frequency(rxd->channel,
1144                                                       status->band);
1145
1146         *qos = rxd->qos_control;
1147         if ((rxd->rx_ctrl & MWL8K_STA_RX_CTRL_DECRYPT_ERROR) &&
1148             (rxd->rx_ctrl & MWL8K_STA_RX_CTRL_DEC_ERR_TYPE))
1149                 status->flag |= RX_FLAG_MMIC_ERROR;
1150
1151         return le16_to_cpu(rxd->pkt_len);
1152 }
1153
1154 static struct rxd_ops rxd_sta_ops = {
1155         .rxd_size       = sizeof(struct mwl8k_rxd_sta),
1156         .rxd_init       = mwl8k_rxd_sta_init,
1157         .rxd_refill     = mwl8k_rxd_sta_refill,
1158         .rxd_process    = mwl8k_rxd_sta_process,
1159 };
1160
1161
1162 #define MWL8K_RX_DESCS          256
1163 #define MWL8K_RX_MAXSZ          3800
1164
1165 static int mwl8k_rxq_init(struct ieee80211_hw *hw, int index)
1166 {
1167         struct mwl8k_priv *priv = hw->priv;
1168         struct mwl8k_rx_queue *rxq = priv->rxq + index;
1169         int size;
1170         int i;
1171
1172         rxq->rxd_count = 0;
1173         rxq->head = 0;
1174         rxq->tail = 0;
1175
1176         size = MWL8K_RX_DESCS * priv->rxd_ops->rxd_size;
1177
1178         rxq->rxd = dma_alloc_coherent(&priv->pdev->dev, size, &rxq->rxd_dma,
1179                                       GFP_KERNEL);
1180         if (rxq->rxd == NULL) {
1181                 wiphy_err(hw->wiphy, "failed to alloc RX descriptors\n");
1182                 return -ENOMEM;
1183         }
1184
1185         rxq->buf = kcalloc(MWL8K_RX_DESCS, sizeof(*rxq->buf), GFP_KERNEL);
1186         if (rxq->buf == NULL) {
1187                 dma_free_coherent(&priv->pdev->dev, size, rxq->rxd,
1188                                   rxq->rxd_dma);
1189                 return -ENOMEM;
1190         }
1191
1192         for (i = 0; i < MWL8K_RX_DESCS; i++) {
1193                 int desc_size;
1194                 void *rxd;
1195                 int nexti;
1196                 dma_addr_t next_dma_addr;
1197
1198                 desc_size = priv->rxd_ops->rxd_size;
1199                 rxd = rxq->rxd + (i * priv->rxd_ops->rxd_size);
1200
1201                 nexti = i + 1;
1202                 if (nexti == MWL8K_RX_DESCS)
1203                         nexti = 0;
1204                 next_dma_addr = rxq->rxd_dma + (nexti * desc_size);
1205
1206                 priv->rxd_ops->rxd_init(rxd, next_dma_addr);
1207         }
1208
1209         return 0;
1210 }
1211
1212 static int rxq_refill(struct ieee80211_hw *hw, int index, int limit)
1213 {
1214         struct mwl8k_priv *priv = hw->priv;
1215         struct mwl8k_rx_queue *rxq = priv->rxq + index;
1216         int refilled = 0;
1217
1218         while (rxq->rxd_count < MWL8K_RX_DESCS && limit--) {
1219                 struct sk_buff *skb;
1220                 dma_addr_t addr;
1221                 int rx;
1222                 void *rxd;
1223
1224                 skb = dev_alloc_skb(MWL8K_RX_MAXSZ);
1225                 if (skb == NULL)
1226                         break;
1227
1228                 addr = dma_map_single(&priv->pdev->dev, skb->data,
1229                                       MWL8K_RX_MAXSZ, DMA_FROM_DEVICE);
1230
1231                 rxq->rxd_count++;
1232                 rx = rxq->tail++;
1233                 if (rxq->tail == MWL8K_RX_DESCS)
1234                         rxq->tail = 0;
1235                 rxq->buf[rx].skb = skb;
1236                 dma_unmap_addr_set(&rxq->buf[rx], dma, addr);
1237
1238                 rxd = rxq->rxd + (rx * priv->rxd_ops->rxd_size);
1239                 priv->rxd_ops->rxd_refill(rxd, addr, MWL8K_RX_MAXSZ);
1240
1241                 refilled++;
1242         }
1243
1244         return refilled;
1245 }
1246
1247 /* Must be called only when the card's reception is completely halted */
1248 static void mwl8k_rxq_deinit(struct ieee80211_hw *hw, int index)
1249 {
1250         struct mwl8k_priv *priv = hw->priv;
1251         struct mwl8k_rx_queue *rxq = priv->rxq + index;
1252         int i;
1253
1254         if (rxq->rxd == NULL)
1255                 return;
1256
1257         for (i = 0; i < MWL8K_RX_DESCS; i++) {
1258                 if (rxq->buf[i].skb != NULL) {
1259                         dma_unmap_single(&priv->pdev->dev,
1260                                          dma_unmap_addr(&rxq->buf[i], dma),
1261                                          MWL8K_RX_MAXSZ, DMA_FROM_DEVICE);
1262                         dma_unmap_addr_set(&rxq->buf[i], dma, 0);
1263
1264                         kfree_skb(rxq->buf[i].skb);
1265                         rxq->buf[i].skb = NULL;
1266                 }
1267         }
1268
1269         kfree(rxq->buf);
1270         rxq->buf = NULL;
1271
1272         dma_free_coherent(&priv->pdev->dev,
1273                           MWL8K_RX_DESCS * priv->rxd_ops->rxd_size, rxq->rxd,
1274                           rxq->rxd_dma);
1275         rxq->rxd = NULL;
1276 }
1277
1278
1279 /*
1280  * Scan a list of BSSIDs to process for finalize join.
1281  * Allows for extension to process multiple BSSIDs.
1282  */
1283 static inline int
1284 mwl8k_capture_bssid(struct mwl8k_priv *priv, struct ieee80211_hdr *wh)
1285 {
1286         return priv->capture_beacon &&
1287                 ieee80211_is_beacon(wh->frame_control) &&
1288                 ether_addr_equal_64bits(wh->addr3, priv->capture_bssid);
1289 }
1290
1291 static inline void mwl8k_save_beacon(struct ieee80211_hw *hw,
1292                                      struct sk_buff *skb)
1293 {
1294         struct mwl8k_priv *priv = hw->priv;
1295
1296         priv->capture_beacon = false;
1297         eth_zero_addr(priv->capture_bssid);
1298
1299         /*
1300          * Use GFP_ATOMIC as rxq_process is called from
1301          * the primary interrupt handler, memory allocation call
1302          * must not sleep.
1303          */
1304         priv->beacon_skb = skb_copy(skb, GFP_ATOMIC);
1305         if (priv->beacon_skb != NULL)
1306                 ieee80211_queue_work(hw, &priv->finalize_join_worker);
1307 }
1308
1309 static inline struct mwl8k_vif *mwl8k_find_vif_bss(struct list_head *vif_list,
1310                                                    u8 *bssid)
1311 {
1312         struct mwl8k_vif *mwl8k_vif;
1313
1314         list_for_each_entry(mwl8k_vif,
1315                             vif_list, list) {
1316                 if (memcmp(bssid, mwl8k_vif->bssid,
1317                            ETH_ALEN) == 0)
1318                         return mwl8k_vif;
1319         }
1320
1321         return NULL;
1322 }
1323
1324 static int rxq_process(struct ieee80211_hw *hw, int index, int limit)
1325 {
1326         struct mwl8k_priv *priv = hw->priv;
1327         struct mwl8k_vif *mwl8k_vif = NULL;
1328         struct mwl8k_rx_queue *rxq = priv->rxq + index;
1329         int processed;
1330
1331         processed = 0;
1332         while (rxq->rxd_count && limit--) {
1333                 struct sk_buff *skb;
1334                 void *rxd;
1335                 int pkt_len;
1336                 struct ieee80211_rx_status status;
1337                 struct ieee80211_hdr *wh;
1338                 __le16 qos;
1339
1340                 skb = rxq->buf[rxq->head].skb;
1341                 if (skb == NULL)
1342                         break;
1343
1344                 rxd = rxq->rxd + (rxq->head * priv->rxd_ops->rxd_size);
1345
1346                 pkt_len = priv->rxd_ops->rxd_process(rxd, &status, &qos,
1347                                                         &priv->noise);
1348                 if (pkt_len < 0)
1349                         break;
1350
1351                 rxq->buf[rxq->head].skb = NULL;
1352
1353                 dma_unmap_single(&priv->pdev->dev,
1354                                  dma_unmap_addr(&rxq->buf[rxq->head], dma),
1355                                  MWL8K_RX_MAXSZ, DMA_FROM_DEVICE);
1356                 dma_unmap_addr_set(&rxq->buf[rxq->head], dma, 0);
1357
1358                 rxq->head++;
1359                 if (rxq->head == MWL8K_RX_DESCS)
1360                         rxq->head = 0;
1361
1362                 rxq->rxd_count--;
1363
1364                 wh = &((struct mwl8k_dma_data *)skb->data)->wh;
1365
1366                 /*
1367                  * Check for a pending join operation.  Save a
1368                  * copy of the beacon and schedule a tasklet to
1369                  * send a FINALIZE_JOIN command to the firmware.
1370                  */
1371                 if (mwl8k_capture_bssid(priv, (void *)skb->data))
1372                         mwl8k_save_beacon(hw, skb);
1373
1374                 if (ieee80211_has_protected(wh->frame_control)) {
1375
1376                         /* Check if hw crypto has been enabled for
1377                          * this bss. If yes, set the status flags
1378                          * accordingly
1379                          */
1380                         mwl8k_vif = mwl8k_find_vif_bss(&priv->vif_list,
1381                                                                 wh->addr1);
1382
1383                         if (mwl8k_vif != NULL &&
1384                             mwl8k_vif->is_hw_crypto_enabled) {
1385                                 /*
1386                                  * When MMIC ERROR is encountered
1387                                  * by the firmware, payload is
1388                                  * dropped and only 32 bytes of
1389                                  * mwl8k Firmware header is sent
1390                                  * to the host.
1391                                  *
1392                                  * We need to add four bytes of
1393                                  * key information.  In it
1394                                  * MAC80211 expects keyidx set to
1395                                  * 0 for triggering Counter
1396                                  * Measure of MMIC failure.
1397                                  */
1398                                 if (status.flag & RX_FLAG_MMIC_ERROR) {
1399                                         struct mwl8k_dma_data *tr;
1400                                         tr = (struct mwl8k_dma_data *)skb->data;
1401                                         memset((void *)&(tr->data), 0, 4);
1402                                         pkt_len += 4;
1403                                 }
1404
1405                                 if (!ieee80211_is_auth(wh->frame_control))
1406                                         status.flag |= RX_FLAG_IV_STRIPPED |
1407                                                        RX_FLAG_DECRYPTED |
1408                                                        RX_FLAG_MMIC_STRIPPED;
1409                         }
1410                 }
1411
1412                 skb_put(skb, pkt_len);
1413                 mwl8k_remove_dma_header(skb, qos);
1414                 memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
1415                 ieee80211_rx_irqsafe(hw, skb);
1416
1417                 processed++;
1418         }
1419
1420         return processed;
1421 }
1422
1423
1424 /*
1425  * Packet transmission.
1426  */
1427
1428 #define MWL8K_TXD_STATUS_OK                     0x00000001
1429 #define MWL8K_TXD_STATUS_OK_RETRY               0x00000002
1430 #define MWL8K_TXD_STATUS_OK_MORE_RETRY          0x00000004
1431 #define MWL8K_TXD_STATUS_MULTICAST_TX           0x00000008
1432 #define MWL8K_TXD_STATUS_FW_OWNED               0x80000000
1433
1434 #define MWL8K_QOS_QLEN_UNSPEC                   0xff00
1435 #define MWL8K_QOS_ACK_POLICY_MASK               0x0060
1436 #define MWL8K_QOS_ACK_POLICY_NORMAL             0x0000
1437 #define MWL8K_QOS_ACK_POLICY_BLOCKACK           0x0060
1438 #define MWL8K_QOS_EOSP                          0x0010
1439
1440 struct mwl8k_tx_desc {
1441         __le32 status;
1442         __u8 data_rate;
1443         __u8 tx_priority;
1444         __le16 qos_control;
1445         __le32 pkt_phys_addr;
1446         __le16 pkt_len;
1447         __u8 dest_MAC_addr[ETH_ALEN];
1448         __le32 next_txd_phys_addr;
1449         __le32 timestamp;
1450         __le16 rate_info;
1451         __u8 peer_id;
1452         __u8 tx_frag_cnt;
1453 } __packed;
1454
1455 #define MWL8K_TX_DESCS          128
1456
1457 static int mwl8k_txq_init(struct ieee80211_hw *hw, int index)
1458 {
1459         struct mwl8k_priv *priv = hw->priv;
1460         struct mwl8k_tx_queue *txq = priv->txq + index;
1461         int size;
1462         int i;
1463
1464         txq->len = 0;
1465         txq->head = 0;
1466         txq->tail = 0;
1467
1468         size = MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc);
1469
1470         txq->txd = dma_alloc_coherent(&priv->pdev->dev, size, &txq->txd_dma,
1471                                       GFP_KERNEL);
1472         if (txq->txd == NULL) {
1473                 wiphy_err(hw->wiphy, "failed to alloc TX descriptors\n");
1474                 return -ENOMEM;
1475         }
1476
1477         txq->skb = kcalloc(MWL8K_TX_DESCS, sizeof(*txq->skb), GFP_KERNEL);
1478         if (txq->skb == NULL) {
1479                 dma_free_coherent(&priv->pdev->dev, size, txq->txd,
1480                                   txq->txd_dma);
1481                 txq->txd = NULL;
1482                 return -ENOMEM;
1483         }
1484
1485         for (i = 0; i < MWL8K_TX_DESCS; i++) {
1486                 struct mwl8k_tx_desc *tx_desc;
1487                 int nexti;
1488
1489                 tx_desc = txq->txd + i;
1490                 nexti = (i + 1) % MWL8K_TX_DESCS;
1491
1492                 tx_desc->status = 0;
1493                 tx_desc->next_txd_phys_addr =
1494                         cpu_to_le32(txq->txd_dma + nexti * sizeof(*tx_desc));
1495         }
1496
1497         return 0;
1498 }
1499
1500 static inline void mwl8k_tx_start(struct mwl8k_priv *priv)
1501 {
1502         iowrite32(MWL8K_H2A_INT_PPA_READY,
1503                 priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
1504         iowrite32(MWL8K_H2A_INT_DUMMY,
1505                 priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
1506         ioread32(priv->regs + MWL8K_HIU_INT_CODE);
1507 }
1508
1509 static void mwl8k_dump_tx_rings(struct ieee80211_hw *hw)
1510 {
1511         struct mwl8k_priv *priv = hw->priv;
1512         int i;
1513
1514         for (i = 0; i < mwl8k_tx_queues(priv); i++) {
1515                 struct mwl8k_tx_queue *txq = priv->txq + i;
1516                 int fw_owned = 0;
1517                 int drv_owned = 0;
1518                 int unused = 0;
1519                 int desc;
1520
1521                 for (desc = 0; desc < MWL8K_TX_DESCS; desc++) {
1522                         struct mwl8k_tx_desc *tx_desc = txq->txd + desc;
1523                         u32 status;
1524
1525                         status = le32_to_cpu(tx_desc->status);
1526                         if (status & MWL8K_TXD_STATUS_FW_OWNED)
1527                                 fw_owned++;
1528                         else
1529                                 drv_owned++;
1530
1531                         if (tx_desc->pkt_len == 0)
1532                                 unused++;
1533                 }
1534
1535                 wiphy_err(hw->wiphy,
1536                           "txq[%d] len=%d head=%d tail=%d "
1537                           "fw_owned=%d drv_owned=%d unused=%d\n",
1538                           i,
1539                           txq->len, txq->head, txq->tail,
1540                           fw_owned, drv_owned, unused);
1541         }
1542 }
1543
1544 /*
1545  * Must be called with priv->fw_mutex held and tx queues stopped.
1546  */
1547 #define MWL8K_TX_WAIT_TIMEOUT_MS        5000
1548
1549 static int mwl8k_tx_wait_empty(struct ieee80211_hw *hw)
1550 {
1551         struct mwl8k_priv *priv = hw->priv;
1552         DECLARE_COMPLETION_ONSTACK(tx_wait);
1553         int retry;
1554         int rc;
1555
1556         might_sleep();
1557
1558         /* Since fw restart is in progress, allow only the firmware
1559          * commands from the restart code and block the other
1560          * commands since they are going to fail in any case since
1561          * the firmware has crashed
1562          */
1563         if (priv->hw_restart_in_progress) {
1564                 if (priv->hw_restart_owner == current)
1565                         return 0;
1566                 else
1567                         return -EBUSY;
1568         }
1569
1570         if (atomic_read(&priv->watchdog_event_pending))
1571                 return 0;
1572
1573         /*
1574          * The TX queues are stopped at this point, so this test
1575          * doesn't need to take ->tx_lock.
1576          */
1577         if (!priv->pending_tx_pkts)
1578                 return 0;
1579
1580         retry = 1;
1581         rc = 0;
1582
1583         spin_lock_bh(&priv->tx_lock);
1584         priv->tx_wait = &tx_wait;
1585         while (!rc) {
1586                 int oldcount;
1587                 unsigned long timeout;
1588
1589                 oldcount = priv->pending_tx_pkts;
1590
1591                 spin_unlock_bh(&priv->tx_lock);
1592                 timeout = wait_for_completion_timeout(&tx_wait,
1593                             msecs_to_jiffies(MWL8K_TX_WAIT_TIMEOUT_MS));
1594
1595                 if (atomic_read(&priv->watchdog_event_pending)) {
1596                         spin_lock_bh(&priv->tx_lock);
1597                         priv->tx_wait = NULL;
1598                         spin_unlock_bh(&priv->tx_lock);
1599                         return 0;
1600                 }
1601
1602                 spin_lock_bh(&priv->tx_lock);
1603
1604                 if (timeout || !priv->pending_tx_pkts) {
1605                         WARN_ON(priv->pending_tx_pkts);
1606                         if (retry)
1607                                 wiphy_notice(hw->wiphy, "tx rings drained\n");
1608                         break;
1609                 }
1610
1611                 if (retry) {
1612                         mwl8k_tx_start(priv);
1613                         retry = 0;
1614                         continue;
1615                 }
1616
1617                 if (priv->pending_tx_pkts < oldcount) {
1618                         wiphy_notice(hw->wiphy,
1619                                      "waiting for tx rings to drain (%d -> %d pkts)\n",
1620                                      oldcount, priv->pending_tx_pkts);
1621                         retry = 1;
1622                         continue;
1623                 }
1624
1625                 priv->tx_wait = NULL;
1626
1627                 wiphy_err(hw->wiphy, "tx rings stuck for %d ms\n",
1628                           MWL8K_TX_WAIT_TIMEOUT_MS);
1629                 mwl8k_dump_tx_rings(hw);
1630                 priv->hw_restart_in_progress = true;
1631                 ieee80211_queue_work(hw, &priv->fw_reload);
1632
1633                 rc = -ETIMEDOUT;
1634         }
1635         priv->tx_wait = NULL;
1636         spin_unlock_bh(&priv->tx_lock);
1637
1638         return rc;
1639 }
1640
1641 #define MWL8K_TXD_SUCCESS(status)                               \
1642         ((status) & (MWL8K_TXD_STATUS_OK |                      \
1643                      MWL8K_TXD_STATUS_OK_RETRY |                \
1644                      MWL8K_TXD_STATUS_OK_MORE_RETRY))
1645
1646 static int mwl8k_tid_queue_mapping(u8 tid)
1647 {
1648         BUG_ON(tid > 7);
1649
1650         switch (tid) {
1651         case 0:
1652         case 3:
1653                 return IEEE80211_AC_BE;
1654         case 1:
1655         case 2:
1656                 return IEEE80211_AC_BK;
1657         case 4:
1658         case 5:
1659                 return IEEE80211_AC_VI;
1660         case 6:
1661         case 7:
1662                 return IEEE80211_AC_VO;
1663         default:
1664                 return -1;
1665         }
1666 }
1667
1668 /* The firmware will fill in the rate information
1669  * for each packet that gets queued in the hardware
1670  * and these macros will interpret that info.
1671  */
1672
1673 #define RI_FORMAT(a)              (a & 0x0001)
1674 #define RI_RATE_ID_MCS(a)        ((a & 0x01f8) >> 3)
1675
1676 static int
1677 mwl8k_txq_reclaim(struct ieee80211_hw *hw, int index, int limit, int force)
1678 {
1679         struct mwl8k_priv *priv = hw->priv;
1680         struct mwl8k_tx_queue *txq = priv->txq + index;
1681         int processed;
1682
1683         processed = 0;
1684         while (txq->len > 0 && limit--) {
1685                 int tx;
1686                 struct mwl8k_tx_desc *tx_desc;
1687                 unsigned long addr;
1688                 int size;
1689                 struct sk_buff *skb;
1690                 struct ieee80211_tx_info *info;
1691                 u32 status;
1692                 struct ieee80211_sta *sta;
1693                 struct mwl8k_sta *sta_info = NULL;
1694                 u16 rate_info;
1695                 struct ieee80211_hdr *wh;
1696
1697                 tx = txq->head;
1698                 tx_desc = txq->txd + tx;
1699
1700                 status = le32_to_cpu(tx_desc->status);
1701
1702                 if (status & MWL8K_TXD_STATUS_FW_OWNED) {
1703                         if (!force)
1704                                 break;
1705                         tx_desc->status &=
1706                                 ~cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED);
1707                 }
1708
1709                 txq->head = (tx + 1) % MWL8K_TX_DESCS;
1710                 BUG_ON(txq->len == 0);
1711                 txq->len--;
1712                 priv->pending_tx_pkts--;
1713
1714                 addr = le32_to_cpu(tx_desc->pkt_phys_addr);
1715                 size = le16_to_cpu(tx_desc->pkt_len);
1716                 skb = txq->skb[tx];
1717                 txq->skb[tx] = NULL;
1718
1719                 BUG_ON(skb == NULL);
1720                 dma_unmap_single(&priv->pdev->dev, addr, size, DMA_TO_DEVICE);
1721
1722                 mwl8k_remove_dma_header(skb, tx_desc->qos_control);
1723
1724                 wh = (struct ieee80211_hdr *) skb->data;
1725
1726                 /* Mark descriptor as unused */
1727                 tx_desc->pkt_phys_addr = 0;
1728                 tx_desc->pkt_len = 0;
1729
1730                 info = IEEE80211_SKB_CB(skb);
1731                 if (ieee80211_is_data(wh->frame_control)) {
1732                         rcu_read_lock();
1733                         sta = ieee80211_find_sta_by_ifaddr(hw, wh->addr1,
1734                                                            wh->addr2);
1735                         if (sta) {
1736                                 sta_info = MWL8K_STA(sta);
1737                                 BUG_ON(sta_info == NULL);
1738                                 rate_info = le16_to_cpu(tx_desc->rate_info);
1739                                 /* If rate is < 6.5 Mpbs for an ht station
1740                                  * do not form an ampdu. If the station is a
1741                                  * legacy station (format = 0), do not form an
1742                                  * ampdu
1743                                  */
1744                                 if (RI_RATE_ID_MCS(rate_info) < 1 ||
1745                                     RI_FORMAT(rate_info) == 0) {
1746                                         sta_info->is_ampdu_allowed = false;
1747                                 } else {
1748                                         sta_info->is_ampdu_allowed = true;
1749                                 }
1750                         }
1751                         rcu_read_unlock();
1752                 }
1753
1754                 ieee80211_tx_info_clear_status(info);
1755
1756                 /* Rate control is happening in the firmware.
1757                  * Ensure no tx rate is being reported.
1758                  */
1759                 info->status.rates[0].idx = -1;
1760                 info->status.rates[0].count = 1;
1761
1762                 if (MWL8K_TXD_SUCCESS(status))
1763                         info->flags |= IEEE80211_TX_STAT_ACK;
1764
1765                 ieee80211_tx_status_irqsafe(hw, skb);
1766
1767                 processed++;
1768         }
1769
1770         return processed;
1771 }
1772
1773 /* must be called only when the card's transmit is completely halted */
1774 static void mwl8k_txq_deinit(struct ieee80211_hw *hw, int index)
1775 {
1776         struct mwl8k_priv *priv = hw->priv;
1777         struct mwl8k_tx_queue *txq = priv->txq + index;
1778
1779         if (txq->txd == NULL)
1780                 return;
1781
1782         mwl8k_txq_reclaim(hw, index, INT_MAX, 1);
1783
1784         kfree(txq->skb);
1785         txq->skb = NULL;
1786
1787         dma_free_coherent(&priv->pdev->dev,
1788                           MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc),
1789                           txq->txd, txq->txd_dma);
1790         txq->txd = NULL;
1791 }
1792
1793 /* caller must hold priv->stream_lock when calling the stream functions */
1794 static struct mwl8k_ampdu_stream *
1795 mwl8k_add_stream(struct ieee80211_hw *hw, struct ieee80211_sta *sta, u8 tid)
1796 {
1797         struct mwl8k_ampdu_stream *stream;
1798         struct mwl8k_priv *priv = hw->priv;
1799         int i;
1800
1801         for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
1802                 stream = &priv->ampdu[i];
1803                 if (stream->state == AMPDU_NO_STREAM) {
1804                         stream->sta = sta;
1805                         stream->state = AMPDU_STREAM_NEW;
1806                         stream->tid = tid;
1807                         stream->idx = i;
1808                         wiphy_debug(hw->wiphy, "Added a new stream for %pM %d",
1809                                     sta->addr, tid);
1810                         return stream;
1811                 }
1812         }
1813         return NULL;
1814 }
1815
1816 static int
1817 mwl8k_start_stream(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream)
1818 {
1819         int ret;
1820
1821         /* if the stream has already been started, don't start it again */
1822         if (stream->state != AMPDU_STREAM_NEW)
1823                 return 0;
1824         ret = ieee80211_start_tx_ba_session(stream->sta, stream->tid, 0);
1825         if (ret)
1826                 wiphy_debug(hw->wiphy, "Failed to start stream for %pM %d: "
1827                             "%d\n", stream->sta->addr, stream->tid, ret);
1828         else
1829                 wiphy_debug(hw->wiphy, "Started stream for %pM %d\n",
1830                             stream->sta->addr, stream->tid);
1831         return ret;
1832 }
1833
1834 static void
1835 mwl8k_remove_stream(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream)
1836 {
1837         wiphy_debug(hw->wiphy, "Remove stream for %pM %d\n", stream->sta->addr,
1838                     stream->tid);
1839         memset(stream, 0, sizeof(*stream));
1840 }
1841
1842 static struct mwl8k_ampdu_stream *
1843 mwl8k_lookup_stream(struct ieee80211_hw *hw, u8 *addr, u8 tid)
1844 {
1845         struct mwl8k_priv *priv = hw->priv;
1846         int i;
1847
1848         for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
1849                 struct mwl8k_ampdu_stream *stream;
1850                 stream = &priv->ampdu[i];
1851                 if (stream->state == AMPDU_NO_STREAM)
1852                         continue;
1853                 if (!memcmp(stream->sta->addr, addr, ETH_ALEN) &&
1854                     stream->tid == tid)
1855                         return stream;
1856         }
1857         return NULL;
1858 }
1859
1860 #define MWL8K_AMPDU_PACKET_THRESHOLD 64
1861 static inline bool mwl8k_ampdu_allowed(struct ieee80211_sta *sta, u8 tid)
1862 {
1863         struct mwl8k_sta *sta_info = MWL8K_STA(sta);
1864         struct tx_traffic_info *tx_stats;
1865
1866         BUG_ON(tid >= MWL8K_MAX_TID);
1867         tx_stats = &sta_info->tx_stats[tid];
1868
1869         return sta_info->is_ampdu_allowed &&
1870                 tx_stats->pkts > MWL8K_AMPDU_PACKET_THRESHOLD;
1871 }
1872
1873 static inline void mwl8k_tx_count_packet(struct ieee80211_sta *sta, u8 tid)
1874 {
1875         struct mwl8k_sta *sta_info = MWL8K_STA(sta);
1876         struct tx_traffic_info *tx_stats;
1877
1878         BUG_ON(tid >= MWL8K_MAX_TID);
1879         tx_stats = &sta_info->tx_stats[tid];
1880
1881         if (tx_stats->start_time == 0)
1882                 tx_stats->start_time = jiffies;
1883
1884         /* reset the packet count after each second elapses.  If the number of
1885          * packets ever exceeds the ampdu_min_traffic threshold, we will allow
1886          * an ampdu stream to be started.
1887          */
1888         if (time_after(jiffies, (unsigned long)tx_stats->start_time + HZ)) {
1889                 tx_stats->pkts = 0;
1890                 tx_stats->start_time = 0;
1891         } else
1892                 tx_stats->pkts++;
1893 }
1894
1895 /* The hardware ampdu queues start from 5.
1896  * txpriorities for ampdu queues are
1897  * 5 6 7 0 1 2 3 4 ie., queue 5 is highest
1898  * and queue 3 is lowest (queue 4 is reserved)
1899  */
1900 #define BA_QUEUE                5
1901
1902 static void
1903 mwl8k_txq_xmit(struct ieee80211_hw *hw,
1904                int index,
1905                struct ieee80211_sta *sta,
1906                struct sk_buff *skb)
1907 {
1908         struct mwl8k_priv *priv = hw->priv;
1909         struct ieee80211_tx_info *tx_info;
1910         struct mwl8k_vif *mwl8k_vif;
1911         struct ieee80211_hdr *wh;
1912         struct mwl8k_tx_queue *txq;
1913         struct mwl8k_tx_desc *tx;
1914         dma_addr_t dma;
1915         u32 txstatus;
1916         u8 txdatarate;
1917         u16 qos;
1918         int txpriority;
1919         u8 tid = 0;
1920         struct mwl8k_ampdu_stream *stream = NULL;
1921         bool start_ba_session = false;
1922         bool mgmtframe = false;
1923         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
1924         bool eapol_frame = false;
1925
1926         wh = (struct ieee80211_hdr *)skb->data;
1927         if (ieee80211_is_data_qos(wh->frame_control))
1928                 qos = le16_to_cpu(*((__le16 *)ieee80211_get_qos_ctl(wh)));
1929         else
1930                 qos = 0;
1931
1932         if (skb->protocol == cpu_to_be16(ETH_P_PAE))
1933                 eapol_frame = true;
1934
1935         if (ieee80211_is_mgmt(wh->frame_control))
1936                 mgmtframe = true;
1937
1938         if (priv->ap_fw)
1939                 mwl8k_encapsulate_tx_frame(priv, skb);
1940         else
1941                 mwl8k_add_dma_header(priv, skb, 0, 0);
1942
1943         wh = &((struct mwl8k_dma_data *)skb->data)->wh;
1944
1945         tx_info = IEEE80211_SKB_CB(skb);
1946         mwl8k_vif = MWL8K_VIF(tx_info->control.vif);
1947
1948         if (tx_info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
1949                 wh->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1950                 wh->seq_ctrl |= cpu_to_le16(mwl8k_vif->seqno);
1951                 mwl8k_vif->seqno += 0x10;
1952         }
1953
1954         /* Setup firmware control bit fields for each frame type.  */
1955         txstatus = 0;
1956         txdatarate = 0;
1957         if (ieee80211_is_mgmt(wh->frame_control) ||
1958             ieee80211_is_ctl(wh->frame_control)) {
1959                 txdatarate = 0;
1960                 qos |= MWL8K_QOS_QLEN_UNSPEC | MWL8K_QOS_EOSP;
1961         } else if (ieee80211_is_data(wh->frame_control)) {
1962                 txdatarate = 1;
1963                 if (is_multicast_ether_addr(wh->addr1))
1964                         txstatus |= MWL8K_TXD_STATUS_MULTICAST_TX;
1965
1966                 qos &= ~MWL8K_QOS_ACK_POLICY_MASK;
1967                 if (tx_info->flags & IEEE80211_TX_CTL_AMPDU)
1968                         qos |= MWL8K_QOS_ACK_POLICY_BLOCKACK;
1969                 else
1970                         qos |= MWL8K_QOS_ACK_POLICY_NORMAL;
1971         }
1972
1973         /* Queue ADDBA request in the respective data queue.  While setting up
1974          * the ampdu stream, mac80211 queues further packets for that
1975          * particular ra/tid pair.  However, packets piled up in the hardware
1976          * for that ra/tid pair will still go out. ADDBA request and the
1977          * related data packets going out from different queues asynchronously
1978          * will cause a shift in the receiver window which might result in
1979          * ampdu packets getting dropped at the receiver after the stream has
1980          * been setup.
1981          */
1982         if (unlikely(ieee80211_is_action(wh->frame_control) &&
1983             mgmt->u.action.category == WLAN_CATEGORY_BACK &&
1984             mgmt->u.action.u.addba_req.action_code == WLAN_ACTION_ADDBA_REQ &&
1985             priv->ap_fw)) {
1986                 u16 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1987                 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1988                 index = mwl8k_tid_queue_mapping(tid);
1989         }
1990
1991         txpriority = index;
1992
1993         if (priv->ap_fw && sta && sta->deflink.ht_cap.ht_supported && !eapol_frame &&
1994             ieee80211_is_data_qos(wh->frame_control)) {
1995                 tid = qos & 0xf;
1996                 mwl8k_tx_count_packet(sta, tid);
1997                 spin_lock(&priv->stream_lock);
1998                 stream = mwl8k_lookup_stream(hw, sta->addr, tid);
1999                 if (stream != NULL) {
2000                         if (stream->state == AMPDU_STREAM_ACTIVE) {
2001                                 WARN_ON(!(qos & MWL8K_QOS_ACK_POLICY_BLOCKACK));
2002                                 txpriority = (BA_QUEUE + stream->idx) %
2003                                              TOTAL_HW_TX_QUEUES;
2004                                 if (stream->idx <= 1)
2005                                         index = stream->idx +
2006                                                 MWL8K_TX_WMM_QUEUES;
2007
2008                         } else if (stream->state == AMPDU_STREAM_NEW) {
2009                                 /* We get here if the driver sends us packets
2010                                  * after we've initiated a stream, but before
2011                                  * our ampdu_action routine has been called
2012                                  * with IEEE80211_AMPDU_TX_START to get the SSN
2013                                  * for the ADDBA request.  So this packet can
2014                                  * go out with no risk of sequence number
2015                                  * mismatch.  No special handling is required.
2016                                  */
2017                         } else {
2018                                 /* Drop packets that would go out after the
2019                                  * ADDBA request was sent but before the ADDBA
2020                                  * response is received.  If we don't do this,
2021                                  * the recipient would probably receive it
2022                                  * after the ADDBA request with SSN 0.  This
2023                                  * will cause the recipient's BA receive window
2024                                  * to shift, which would cause the subsequent
2025                                  * packets in the BA stream to be discarded.
2026                                  * mac80211 queues our packets for us in this
2027                                  * case, so this is really just a safety check.
2028                                  */
2029                                 wiphy_warn(hw->wiphy,
2030                                            "Cannot send packet while ADDBA "
2031                                            "dialog is underway.\n");
2032                                 spin_unlock(&priv->stream_lock);
2033                                 dev_kfree_skb(skb);
2034                                 return;
2035                         }
2036                 } else {
2037                         /* Defer calling mwl8k_start_stream so that the current
2038                          * skb can go out before the ADDBA request.  This
2039                          * prevents sequence number mismatch at the recepient
2040                          * as described above.
2041                          */
2042                         if (mwl8k_ampdu_allowed(sta, tid)) {
2043                                 stream = mwl8k_add_stream(hw, sta, tid);
2044                                 if (stream != NULL)
2045                                         start_ba_session = true;
2046                         }
2047                 }
2048                 spin_unlock(&priv->stream_lock);
2049         } else {
2050                 qos &= ~MWL8K_QOS_ACK_POLICY_MASK;
2051                 qos |= MWL8K_QOS_ACK_POLICY_NORMAL;
2052         }
2053
2054         dma = dma_map_single(&priv->pdev->dev, skb->data, skb->len,
2055                              DMA_TO_DEVICE);
2056
2057         if (dma_mapping_error(&priv->pdev->dev, dma)) {
2058                 wiphy_debug(hw->wiphy,
2059                             "failed to dma map skb, dropping TX frame.\n");
2060                 if (start_ba_session) {
2061                         spin_lock(&priv->stream_lock);
2062                         mwl8k_remove_stream(hw, stream);
2063                         spin_unlock(&priv->stream_lock);
2064                 }
2065                 dev_kfree_skb(skb);
2066                 return;
2067         }
2068
2069         spin_lock_bh(&priv->tx_lock);
2070
2071         txq = priv->txq + index;
2072
2073         /* Mgmt frames that go out frequently are probe
2074          * responses. Other mgmt frames got out relatively
2075          * infrequently. Hence reserve 2 buffers so that
2076          * other mgmt frames do not get dropped due to an
2077          * already queued probe response in one of the
2078          * reserved buffers.
2079          */
2080
2081         if (txq->len >= MWL8K_TX_DESCS - 2) {
2082                 if (!mgmtframe || txq->len == MWL8K_TX_DESCS) {
2083                         if (start_ba_session) {
2084                                 spin_lock(&priv->stream_lock);
2085                                 mwl8k_remove_stream(hw, stream);
2086                                 spin_unlock(&priv->stream_lock);
2087                         }
2088                         mwl8k_tx_start(priv);
2089                         spin_unlock_bh(&priv->tx_lock);
2090                         dma_unmap_single(&priv->pdev->dev, dma, skb->len,
2091                                          DMA_TO_DEVICE);
2092                         dev_kfree_skb(skb);
2093                         return;
2094                 }
2095         }
2096
2097         BUG_ON(txq->skb[txq->tail] != NULL);
2098         txq->skb[txq->tail] = skb;
2099
2100         tx = txq->txd + txq->tail;
2101         tx->data_rate = txdatarate;
2102         tx->tx_priority = txpriority;
2103         tx->qos_control = cpu_to_le16(qos);
2104         tx->pkt_phys_addr = cpu_to_le32(dma);
2105         tx->pkt_len = cpu_to_le16(skb->len);
2106         tx->rate_info = 0;
2107         if (!priv->ap_fw && sta != NULL)
2108                 tx->peer_id = MWL8K_STA(sta)->peer_id;
2109         else
2110                 tx->peer_id = 0;
2111
2112         if (priv->ap_fw && ieee80211_is_data(wh->frame_control) && !eapol_frame)
2113                 tx->timestamp = cpu_to_le32(ioread32(priv->regs +
2114                                                 MWL8K_HW_TIMER_REGISTER));
2115         else
2116                 tx->timestamp = 0;
2117
2118         wmb();
2119         tx->status = cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED | txstatus);
2120
2121         txq->len++;
2122         priv->pending_tx_pkts++;
2123
2124         txq->tail++;
2125         if (txq->tail == MWL8K_TX_DESCS)
2126                 txq->tail = 0;
2127
2128         mwl8k_tx_start(priv);
2129
2130         spin_unlock_bh(&priv->tx_lock);
2131
2132         /* Initiate the ampdu session here */
2133         if (start_ba_session) {
2134                 spin_lock(&priv->stream_lock);
2135                 if (mwl8k_start_stream(hw, stream))
2136                         mwl8k_remove_stream(hw, stream);
2137                 spin_unlock(&priv->stream_lock);
2138         }
2139 }
2140
2141
2142 /*
2143  * Firmware access.
2144  *
2145  * We have the following requirements for issuing firmware commands:
2146  * - Some commands require that the packet transmit path is idle when
2147  *   the command is issued.  (For simplicity, we'll just quiesce the
2148  *   transmit path for every command.)
2149  * - There are certain sequences of commands that need to be issued to
2150  *   the hardware sequentially, with no other intervening commands.
2151  *
2152  * This leads to an implementation of a "firmware lock" as a mutex that
2153  * can be taken recursively, and which is taken by both the low-level
2154  * command submission function (mwl8k_post_cmd) as well as any users of
2155  * that function that require issuing of an atomic sequence of commands,
2156  * and quiesces the transmit path whenever it's taken.
2157  */
2158 static int mwl8k_fw_lock(struct ieee80211_hw *hw)
2159 {
2160         struct mwl8k_priv *priv = hw->priv;
2161
2162         if (priv->fw_mutex_owner != current) {
2163                 int rc;
2164
2165                 mutex_lock(&priv->fw_mutex);
2166                 ieee80211_stop_queues(hw);
2167
2168                 rc = mwl8k_tx_wait_empty(hw);
2169                 if (rc) {
2170                         if (!priv->hw_restart_in_progress)
2171                                 ieee80211_wake_queues(hw);
2172
2173                         mutex_unlock(&priv->fw_mutex);
2174
2175                         return rc;
2176                 }
2177
2178                 priv->fw_mutex_owner = current;
2179         }
2180
2181         priv->fw_mutex_depth++;
2182
2183         return 0;
2184 }
2185
2186 static void mwl8k_fw_unlock(struct ieee80211_hw *hw)
2187 {
2188         struct mwl8k_priv *priv = hw->priv;
2189
2190         if (!--priv->fw_mutex_depth) {
2191                 if (!priv->hw_restart_in_progress)
2192                         ieee80211_wake_queues(hw);
2193
2194                 priv->fw_mutex_owner = NULL;
2195                 mutex_unlock(&priv->fw_mutex);
2196         }
2197 }
2198
2199 static void mwl8k_enable_bsses(struct ieee80211_hw *hw, bool enable,
2200                                u32 bitmap);
2201
2202 /*
2203  * Command processing.
2204  */
2205
2206 /* Timeout firmware commands after 10s */
2207 #define MWL8K_CMD_TIMEOUT_MS    10000
2208
2209 static int mwl8k_post_cmd(struct ieee80211_hw *hw, struct mwl8k_cmd_pkt_hdr *cmd)
2210 {
2211         DECLARE_COMPLETION_ONSTACK(cmd_wait);
2212         struct mwl8k_priv *priv = hw->priv;
2213         void __iomem *regs = priv->regs;
2214         dma_addr_t dma_addr;
2215         unsigned int dma_size;
2216         int rc;
2217         unsigned long time_left = 0;
2218         u8 buf[32];
2219         u32 bitmap = 0;
2220
2221         wiphy_dbg(hw->wiphy, "Posting %s [%d]\n",
2222                   mwl8k_cmd_name(cmd->code, buf, sizeof(buf)), cmd->macid);
2223
2224         /* Before posting firmware commands that could change the hardware
2225          * characteristics, make sure that all BSSes are stopped temporary.
2226          * Enable these stopped BSSes after completion of the commands
2227          */
2228
2229         rc = mwl8k_fw_lock(hw);
2230         if (rc)
2231                 return rc;
2232
2233         if (priv->ap_fw && priv->running_bsses) {
2234                 switch (le16_to_cpu(cmd->code)) {
2235                 case MWL8K_CMD_SET_RF_CHANNEL:
2236                 case MWL8K_CMD_RADIO_CONTROL:
2237                 case MWL8K_CMD_RF_TX_POWER:
2238                 case MWL8K_CMD_TX_POWER:
2239                 case MWL8K_CMD_RF_ANTENNA:
2240                 case MWL8K_CMD_RTS_THRESHOLD:
2241                 case MWL8K_CMD_MIMO_CONFIG:
2242                         bitmap = priv->running_bsses;
2243                         mwl8k_enable_bsses(hw, false, bitmap);
2244                         break;
2245                 }
2246         }
2247
2248         cmd->result = (__force __le16) 0xffff;
2249         dma_size = le16_to_cpu(cmd->length);
2250         dma_addr = dma_map_single(&priv->pdev->dev, cmd, dma_size,
2251                                   DMA_BIDIRECTIONAL);
2252         if (dma_mapping_error(&priv->pdev->dev, dma_addr)) {
2253                 rc = -ENOMEM;
2254                 goto exit;
2255         }
2256
2257         priv->hostcmd_wait = &cmd_wait;
2258         iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR);
2259         iowrite32(MWL8K_H2A_INT_DOORBELL,
2260                 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
2261         iowrite32(MWL8K_H2A_INT_DUMMY,
2262                 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
2263
2264         time_left = wait_for_completion_timeout(&cmd_wait,
2265                                                 msecs_to_jiffies(MWL8K_CMD_TIMEOUT_MS));
2266
2267         priv->hostcmd_wait = NULL;
2268
2269
2270         dma_unmap_single(&priv->pdev->dev, dma_addr, dma_size,
2271                          DMA_BIDIRECTIONAL);
2272
2273         if (!time_left) {
2274                 wiphy_err(hw->wiphy, "Command %s timeout after %u ms\n",
2275                           mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
2276                           MWL8K_CMD_TIMEOUT_MS);
2277                 rc = -ETIMEDOUT;
2278         } else {
2279                 int ms;
2280
2281                 ms = MWL8K_CMD_TIMEOUT_MS - jiffies_to_msecs(time_left);
2282
2283                 rc = cmd->result ? -EINVAL : 0;
2284                 if (rc)
2285                         wiphy_err(hw->wiphy, "Command %s error 0x%x\n",
2286                                   mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
2287                                   le16_to_cpu(cmd->result));
2288                 else if (ms > 2000)
2289                         wiphy_notice(hw->wiphy, "Command %s took %d ms\n",
2290                                      mwl8k_cmd_name(cmd->code,
2291                                                     buf, sizeof(buf)),
2292                                      ms);
2293         }
2294
2295 exit:
2296         if (bitmap)
2297                 mwl8k_enable_bsses(hw, true, bitmap);
2298
2299         mwl8k_fw_unlock(hw);
2300
2301         return rc;
2302 }
2303
2304 static int mwl8k_post_pervif_cmd(struct ieee80211_hw *hw,
2305                                  struct ieee80211_vif *vif,
2306                                  struct mwl8k_cmd_pkt_hdr *cmd)
2307 {
2308         if (vif != NULL)
2309                 cmd->macid = MWL8K_VIF(vif)->macid;
2310         return mwl8k_post_cmd(hw, cmd);
2311 }
2312
2313 /*
2314  * Setup code shared between STA and AP firmware images.
2315  */
2316 static void mwl8k_setup_2ghz_band(struct ieee80211_hw *hw)
2317 {
2318         struct mwl8k_priv *priv = hw->priv;
2319
2320         BUILD_BUG_ON(sizeof(priv->channels_24) != sizeof(mwl8k_channels_24));
2321         memcpy(priv->channels_24, mwl8k_channels_24, sizeof(mwl8k_channels_24));
2322
2323         BUILD_BUG_ON(sizeof(priv->rates_24) != sizeof(mwl8k_rates_24));
2324         memcpy(priv->rates_24, mwl8k_rates_24, sizeof(mwl8k_rates_24));
2325
2326         priv->band_24.band = NL80211_BAND_2GHZ;
2327         priv->band_24.channels = priv->channels_24;
2328         priv->band_24.n_channels = ARRAY_SIZE(mwl8k_channels_24);
2329         priv->band_24.bitrates = priv->rates_24;
2330         priv->band_24.n_bitrates = ARRAY_SIZE(mwl8k_rates_24);
2331
2332         hw->wiphy->bands[NL80211_BAND_2GHZ] = &priv->band_24;
2333 }
2334
2335 static void mwl8k_setup_5ghz_band(struct ieee80211_hw *hw)
2336 {
2337         struct mwl8k_priv *priv = hw->priv;
2338
2339         BUILD_BUG_ON(sizeof(priv->channels_50) != sizeof(mwl8k_channels_50));
2340         memcpy(priv->channels_50, mwl8k_channels_50, sizeof(mwl8k_channels_50));
2341
2342         BUILD_BUG_ON(sizeof(priv->rates_50) != sizeof(mwl8k_rates_50));
2343         memcpy(priv->rates_50, mwl8k_rates_50, sizeof(mwl8k_rates_50));
2344
2345         priv->band_50.band = NL80211_BAND_5GHZ;
2346         priv->band_50.channels = priv->channels_50;
2347         priv->band_50.n_channels = ARRAY_SIZE(mwl8k_channels_50);
2348         priv->band_50.bitrates = priv->rates_50;
2349         priv->band_50.n_bitrates = ARRAY_SIZE(mwl8k_rates_50);
2350
2351         hw->wiphy->bands[NL80211_BAND_5GHZ] = &priv->band_50;
2352 }
2353
2354 /*
2355  * CMD_GET_HW_SPEC (STA version).
2356  */
2357 struct mwl8k_cmd_get_hw_spec_sta {
2358         struct mwl8k_cmd_pkt_hdr header;
2359         __u8 hw_rev;
2360         __u8 host_interface;
2361         __le16 num_mcaddrs;
2362         __u8 perm_addr[ETH_ALEN];
2363         __le16 region_code;
2364         __le32 fw_rev;
2365         __le32 ps_cookie;
2366         __le32 caps;
2367         __u8 mcs_bitmap[16];
2368         __le32 rx_queue_ptr;
2369         __le32 num_tx_queues;
2370         __le32 tx_queue_ptrs[MWL8K_TX_WMM_QUEUES];
2371         __le32 caps2;
2372         __le32 num_tx_desc_per_queue;
2373         __le32 total_rxd;
2374 } __packed;
2375
2376 #define MWL8K_CAP_MAX_AMSDU             0x20000000
2377 #define MWL8K_CAP_GREENFIELD            0x08000000
2378 #define MWL8K_CAP_AMPDU                 0x04000000
2379 #define MWL8K_CAP_RX_STBC               0x01000000
2380 #define MWL8K_CAP_TX_STBC               0x00800000
2381 #define MWL8K_CAP_SHORTGI_40MHZ         0x00400000
2382 #define MWL8K_CAP_SHORTGI_20MHZ         0x00200000
2383 #define MWL8K_CAP_RX_ANTENNA_MASK       0x000e0000
2384 #define MWL8K_CAP_TX_ANTENNA_MASK       0x0001c000
2385 #define MWL8K_CAP_DELAY_BA              0x00003000
2386 #define MWL8K_CAP_MIMO                  0x00000200
2387 #define MWL8K_CAP_40MHZ                 0x00000100
2388 #define MWL8K_CAP_BAND_MASK             0x00000007
2389 #define MWL8K_CAP_5GHZ                  0x00000004
2390 #define MWL8K_CAP_2GHZ4                 0x00000001
2391
2392 static void
2393 mwl8k_set_ht_caps(struct ieee80211_hw *hw,
2394                   struct ieee80211_supported_band *band, u32 cap)
2395 {
2396         int rx_streams;
2397         int tx_streams;
2398
2399         band->ht_cap.ht_supported = 1;
2400
2401         if (cap & MWL8K_CAP_MAX_AMSDU)
2402                 band->ht_cap.cap |= IEEE80211_HT_CAP_MAX_AMSDU;
2403         if (cap & MWL8K_CAP_GREENFIELD)
2404                 band->ht_cap.cap |= IEEE80211_HT_CAP_GRN_FLD;
2405         if (cap & MWL8K_CAP_AMPDU) {
2406                 ieee80211_hw_set(hw, AMPDU_AGGREGATION);
2407                 band->ht_cap.ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
2408                 band->ht_cap.ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE;
2409         }
2410         if (cap & MWL8K_CAP_RX_STBC)
2411                 band->ht_cap.cap |= IEEE80211_HT_CAP_RX_STBC;
2412         if (cap & MWL8K_CAP_TX_STBC)
2413                 band->ht_cap.cap |= IEEE80211_HT_CAP_TX_STBC;
2414         if (cap & MWL8K_CAP_SHORTGI_40MHZ)
2415                 band->ht_cap.cap |= IEEE80211_HT_CAP_SGI_40;
2416         if (cap & MWL8K_CAP_SHORTGI_20MHZ)
2417                 band->ht_cap.cap |= IEEE80211_HT_CAP_SGI_20;
2418         if (cap & MWL8K_CAP_DELAY_BA)
2419                 band->ht_cap.cap |= IEEE80211_HT_CAP_DELAY_BA;
2420         if (cap & MWL8K_CAP_40MHZ)
2421                 band->ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2422
2423         rx_streams = hweight32(cap & MWL8K_CAP_RX_ANTENNA_MASK);
2424         tx_streams = hweight32(cap & MWL8K_CAP_TX_ANTENNA_MASK);
2425
2426         band->ht_cap.mcs.rx_mask[0] = 0xff;
2427         if (rx_streams >= 2)
2428                 band->ht_cap.mcs.rx_mask[1] = 0xff;
2429         if (rx_streams >= 3)
2430                 band->ht_cap.mcs.rx_mask[2] = 0xff;
2431         band->ht_cap.mcs.rx_mask[4] = 0x01;
2432         band->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
2433
2434         if (rx_streams != tx_streams) {
2435                 band->ht_cap.mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
2436                 band->ht_cap.mcs.tx_params |= (tx_streams - 1) <<
2437                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
2438         }
2439 }
2440
2441 static void
2442 mwl8k_set_caps(struct ieee80211_hw *hw, u32 caps)
2443 {
2444         struct mwl8k_priv *priv = hw->priv;
2445
2446         if (priv->caps)
2447                 return;
2448
2449         if ((caps & MWL8K_CAP_2GHZ4) || !(caps & MWL8K_CAP_BAND_MASK)) {
2450                 mwl8k_setup_2ghz_band(hw);
2451                 if (caps & MWL8K_CAP_MIMO)
2452                         mwl8k_set_ht_caps(hw, &priv->band_24, caps);
2453         }
2454
2455         if (caps & MWL8K_CAP_5GHZ) {
2456                 mwl8k_setup_5ghz_band(hw);
2457                 if (caps & MWL8K_CAP_MIMO)
2458                         mwl8k_set_ht_caps(hw, &priv->band_50, caps);
2459         }
2460
2461         priv->caps = caps;
2462 }
2463
2464 static int mwl8k_cmd_get_hw_spec_sta(struct ieee80211_hw *hw)
2465 {
2466         struct mwl8k_priv *priv = hw->priv;
2467         struct mwl8k_cmd_get_hw_spec_sta *cmd;
2468         int rc;
2469         int i;
2470
2471         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2472         if (cmd == NULL)
2473                 return -ENOMEM;
2474
2475         cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_HW_SPEC);
2476         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2477
2478         memset(cmd->perm_addr, 0xff, sizeof(cmd->perm_addr));
2479         cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2480         cmd->rx_queue_ptr = cpu_to_le32(priv->rxq[0].rxd_dma);
2481         cmd->num_tx_queues = cpu_to_le32(mwl8k_tx_queues(priv));
2482         for (i = 0; i < mwl8k_tx_queues(priv); i++)
2483                 cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[i].txd_dma);
2484         cmd->num_tx_desc_per_queue = cpu_to_le32(MWL8K_TX_DESCS);
2485         cmd->total_rxd = cpu_to_le32(MWL8K_RX_DESCS);
2486
2487         rc = mwl8k_post_cmd(hw, &cmd->header);
2488
2489         if (!rc) {
2490                 SET_IEEE80211_PERM_ADDR(hw, cmd->perm_addr);
2491                 priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs);
2492                 priv->fw_rev = le32_to_cpu(cmd->fw_rev);
2493                 priv->hw_rev = cmd->hw_rev;
2494                 mwl8k_set_caps(hw, le32_to_cpu(cmd->caps));
2495                 priv->ap_macids_supported = 0x00000000;
2496                 priv->sta_macids_supported = 0x00000001;
2497         }
2498
2499         kfree(cmd);
2500         return rc;
2501 }
2502
2503 /*
2504  * CMD_GET_HW_SPEC (AP version).
2505  */
2506 struct mwl8k_cmd_get_hw_spec_ap {
2507         struct mwl8k_cmd_pkt_hdr header;
2508         __u8 hw_rev;
2509         __u8 host_interface;
2510         __le16 num_wcb;
2511         __le16 num_mcaddrs;
2512         __u8 perm_addr[ETH_ALEN];
2513         __le16 region_code;
2514         __le16 num_antenna;
2515         __le32 fw_rev;
2516         __le32 wcbbase0;
2517         __le32 rxwrptr;
2518         __le32 rxrdptr;
2519         __le32 ps_cookie;
2520         __le32 wcbbase1;
2521         __le32 wcbbase2;
2522         __le32 wcbbase3;
2523         __le32 fw_api_version;
2524         __le32 caps;
2525         __le32 num_of_ampdu_queues;
2526         __le32 wcbbase_ampdu[MWL8K_MAX_AMPDU_QUEUES];
2527 } __packed;
2528
2529 static int mwl8k_cmd_get_hw_spec_ap(struct ieee80211_hw *hw)
2530 {
2531         struct mwl8k_priv *priv = hw->priv;
2532         struct mwl8k_cmd_get_hw_spec_ap *cmd;
2533         int rc, i;
2534         u32 api_version;
2535
2536         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2537         if (cmd == NULL)
2538                 return -ENOMEM;
2539
2540         cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_HW_SPEC);
2541         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2542
2543         memset(cmd->perm_addr, 0xff, sizeof(cmd->perm_addr));
2544         cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2545
2546         rc = mwl8k_post_cmd(hw, &cmd->header);
2547
2548         if (!rc) {
2549                 int off;
2550
2551                 api_version = le32_to_cpu(cmd->fw_api_version);
2552                 if (priv->device_info->fw_api_ap != api_version) {
2553                         printk(KERN_ERR "%s: Unsupported fw API version for %s."
2554                                "  Expected %d got %d.\n", MWL8K_NAME,
2555                                priv->device_info->part_name,
2556                                priv->device_info->fw_api_ap,
2557                                api_version);
2558                         rc = -EINVAL;
2559                         goto done;
2560                 }
2561                 SET_IEEE80211_PERM_ADDR(hw, cmd->perm_addr);
2562                 priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs);
2563                 priv->fw_rev = le32_to_cpu(cmd->fw_rev);
2564                 priv->hw_rev = cmd->hw_rev;
2565                 mwl8k_set_caps(hw, le32_to_cpu(cmd->caps));
2566                 priv->ap_macids_supported = 0x000000ff;
2567                 priv->sta_macids_supported = 0x00000100;
2568                 priv->num_ampdu_queues = le32_to_cpu(cmd->num_of_ampdu_queues);
2569                 if (priv->num_ampdu_queues > MWL8K_MAX_AMPDU_QUEUES) {
2570                         wiphy_warn(hw->wiphy, "fw reported %d ampdu queues"
2571                                    " but we only support %d.\n",
2572                                    priv->num_ampdu_queues,
2573                                    MWL8K_MAX_AMPDU_QUEUES);
2574                         priv->num_ampdu_queues = MWL8K_MAX_AMPDU_QUEUES;
2575                 }
2576                 off = le32_to_cpu(cmd->rxwrptr) & 0xffff;
2577                 iowrite32(priv->rxq[0].rxd_dma, priv->sram + off);
2578
2579                 off = le32_to_cpu(cmd->rxrdptr) & 0xffff;
2580                 iowrite32(priv->rxq[0].rxd_dma, priv->sram + off);
2581
2582                 priv->txq_offset[0] = le32_to_cpu(cmd->wcbbase0) & 0xffff;
2583                 priv->txq_offset[1] = le32_to_cpu(cmd->wcbbase1) & 0xffff;
2584                 priv->txq_offset[2] = le32_to_cpu(cmd->wcbbase2) & 0xffff;
2585                 priv->txq_offset[3] = le32_to_cpu(cmd->wcbbase3) & 0xffff;
2586
2587                 for (i = 0; i < priv->num_ampdu_queues; i++)
2588                         priv->txq_offset[i + MWL8K_TX_WMM_QUEUES] =
2589                                 le32_to_cpu(cmd->wcbbase_ampdu[i]) & 0xffff;
2590         }
2591
2592 done:
2593         kfree(cmd);
2594         return rc;
2595 }
2596
2597 /*
2598  * CMD_SET_HW_SPEC.
2599  */
2600 struct mwl8k_cmd_set_hw_spec {
2601         struct mwl8k_cmd_pkt_hdr header;
2602         __u8 hw_rev;
2603         __u8 host_interface;
2604         __le16 num_mcaddrs;
2605         __u8 perm_addr[ETH_ALEN];
2606         __le16 region_code;
2607         __le32 fw_rev;
2608         __le32 ps_cookie;
2609         __le32 caps;
2610         __le32 rx_queue_ptr;
2611         __le32 num_tx_queues;
2612         __le32 tx_queue_ptrs[MWL8K_MAX_TX_QUEUES];
2613         __le32 flags;
2614         __le32 num_tx_desc_per_queue;
2615         __le32 total_rxd;
2616 } __packed;
2617
2618 /* If enabled, MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY will cause
2619  * packets to expire 500 ms after the timestamp in the tx descriptor.  That is,
2620  * the packets that are queued for more than 500ms, will be dropped in the
2621  * hardware. This helps minimizing the issues caused due to head-of-line
2622  * blocking where a slow client can hog the bandwidth and affect traffic to a
2623  * faster client.
2624  */
2625 #define MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY  0x00000400
2626 #define MWL8K_SET_HW_SPEC_FLAG_GENERATE_CCMP_HDR        0x00000200
2627 #define MWL8K_SET_HW_SPEC_FLAG_HOST_DECR_MGMT           0x00000080
2628 #define MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_PROBERESP       0x00000020
2629 #define MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_BEACON          0x00000010
2630
2631 static int mwl8k_cmd_set_hw_spec(struct ieee80211_hw *hw)
2632 {
2633         struct mwl8k_priv *priv = hw->priv;
2634         struct mwl8k_cmd_set_hw_spec *cmd;
2635         int rc;
2636         int i;
2637
2638         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2639         if (cmd == NULL)
2640                 return -ENOMEM;
2641
2642         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_HW_SPEC);
2643         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2644
2645         cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2646         cmd->rx_queue_ptr = cpu_to_le32(priv->rxq[0].rxd_dma);
2647         cmd->num_tx_queues = cpu_to_le32(mwl8k_tx_queues(priv));
2648
2649         /*
2650          * Mac80211 stack has Q0 as highest priority and Q3 as lowest in
2651          * that order. Firmware has Q3 as highest priority and Q0 as lowest
2652          * in that order. Map Q3 of mac80211 to Q0 of firmware so that the
2653          * priority is interpreted the right way in firmware.
2654          */
2655         for (i = 0; i < mwl8k_tx_queues(priv); i++) {
2656                 int j = mwl8k_tx_queues(priv) - 1 - i;
2657                 cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[j].txd_dma);
2658         }
2659
2660         cmd->flags = cpu_to_le32(MWL8K_SET_HW_SPEC_FLAG_HOST_DECR_MGMT |
2661                                  MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_PROBERESP |
2662                                  MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_BEACON |
2663                                  MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY |
2664                                  MWL8K_SET_HW_SPEC_FLAG_GENERATE_CCMP_HDR);
2665         cmd->num_tx_desc_per_queue = cpu_to_le32(MWL8K_TX_DESCS);
2666         cmd->total_rxd = cpu_to_le32(MWL8K_RX_DESCS);
2667
2668         rc = mwl8k_post_cmd(hw, &cmd->header);
2669         kfree(cmd);
2670
2671         return rc;
2672 }
2673
2674 /*
2675  * CMD_MAC_MULTICAST_ADR.
2676  */
2677 struct mwl8k_cmd_mac_multicast_adr {
2678         struct mwl8k_cmd_pkt_hdr header;
2679         __le16 action;
2680         __le16 numaddr;
2681         __u8 addr[][ETH_ALEN];
2682 };
2683
2684 #define MWL8K_ENABLE_RX_DIRECTED        0x0001
2685 #define MWL8K_ENABLE_RX_MULTICAST       0x0002
2686 #define MWL8K_ENABLE_RX_ALL_MULTICAST   0x0004
2687 #define MWL8K_ENABLE_RX_BROADCAST       0x0008
2688
2689 static struct mwl8k_cmd_pkt_hdr *
2690 __mwl8k_cmd_mac_multicast_adr(struct ieee80211_hw *hw, int allmulti,
2691                               struct netdev_hw_addr_list *mc_list)
2692 {
2693         struct mwl8k_priv *priv = hw->priv;
2694         struct mwl8k_cmd_mac_multicast_adr *cmd;
2695         int size;
2696         int mc_count = 0;
2697
2698         if (mc_list)
2699                 mc_count = netdev_hw_addr_list_count(mc_list);
2700
2701         if (allmulti || mc_count > priv->num_mcaddrs) {
2702                 allmulti = 1;
2703                 mc_count = 0;
2704         }
2705
2706         size = sizeof(*cmd) + mc_count * ETH_ALEN;
2707
2708         cmd = kzalloc(size, GFP_ATOMIC);
2709         if (cmd == NULL)
2710                 return NULL;
2711
2712         cmd->header.code = cpu_to_le16(MWL8K_CMD_MAC_MULTICAST_ADR);
2713         cmd->header.length = cpu_to_le16(size);
2714         cmd->action = cpu_to_le16(MWL8K_ENABLE_RX_DIRECTED |
2715                                   MWL8K_ENABLE_RX_BROADCAST);
2716
2717         if (allmulti) {
2718                 cmd->action |= cpu_to_le16(MWL8K_ENABLE_RX_ALL_MULTICAST);
2719         } else if (mc_count) {
2720                 struct netdev_hw_addr *ha;
2721                 int i = 0;
2722
2723                 cmd->action |= cpu_to_le16(MWL8K_ENABLE_RX_MULTICAST);
2724                 cmd->numaddr = cpu_to_le16(mc_count);
2725                 netdev_hw_addr_list_for_each(ha, mc_list) {
2726                         memcpy(cmd->addr[i++], ha->addr, ETH_ALEN);
2727                 }
2728         }
2729
2730         return &cmd->header;
2731 }
2732
2733 /*
2734  * CMD_GET_STAT.
2735  */
2736 struct mwl8k_cmd_get_stat {
2737         struct mwl8k_cmd_pkt_hdr header;
2738         __le32 stats[64];
2739 } __packed;
2740
2741 #define MWL8K_STAT_ACK_FAILURE  9
2742 #define MWL8K_STAT_RTS_FAILURE  12
2743 #define MWL8K_STAT_FCS_ERROR    24
2744 #define MWL8K_STAT_RTS_SUCCESS  11
2745
2746 static int mwl8k_cmd_get_stat(struct ieee80211_hw *hw,
2747                               struct ieee80211_low_level_stats *stats)
2748 {
2749         struct mwl8k_cmd_get_stat *cmd;
2750         int rc;
2751
2752         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2753         if (cmd == NULL)
2754                 return -ENOMEM;
2755
2756         cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_STAT);
2757         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2758
2759         rc = mwl8k_post_cmd(hw, &cmd->header);
2760         if (!rc) {
2761                 stats->dot11ACKFailureCount =
2762                         le32_to_cpu(cmd->stats[MWL8K_STAT_ACK_FAILURE]);
2763                 stats->dot11RTSFailureCount =
2764                         le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_FAILURE]);
2765                 stats->dot11FCSErrorCount =
2766                         le32_to_cpu(cmd->stats[MWL8K_STAT_FCS_ERROR]);
2767                 stats->dot11RTSSuccessCount =
2768                         le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_SUCCESS]);
2769         }
2770         kfree(cmd);
2771
2772         return rc;
2773 }
2774
2775 /*
2776  * CMD_RADIO_CONTROL.
2777  */
2778 struct mwl8k_cmd_radio_control {
2779         struct mwl8k_cmd_pkt_hdr header;
2780         __le16 action;
2781         __le16 control;
2782         __le16 radio_on;
2783 } __packed;
2784
2785 static int
2786 mwl8k_cmd_radio_control(struct ieee80211_hw *hw, bool enable, bool force)
2787 {
2788         struct mwl8k_priv *priv = hw->priv;
2789         struct mwl8k_cmd_radio_control *cmd;
2790         int rc;
2791
2792         if (enable == priv->radio_on && !force)
2793                 return 0;
2794
2795         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2796         if (cmd == NULL)
2797                 return -ENOMEM;
2798
2799         cmd->header.code = cpu_to_le16(MWL8K_CMD_RADIO_CONTROL);
2800         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2801         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
2802         cmd->control = cpu_to_le16(priv->radio_short_preamble ? 3 : 1);
2803         cmd->radio_on = cpu_to_le16(enable ? 0x0001 : 0x0000);
2804
2805         rc = mwl8k_post_cmd(hw, &cmd->header);
2806         kfree(cmd);
2807
2808         if (!rc)
2809                 priv->radio_on = enable;
2810
2811         return rc;
2812 }
2813
2814 static int mwl8k_cmd_radio_disable(struct ieee80211_hw *hw)
2815 {
2816         return mwl8k_cmd_radio_control(hw, 0, 0);
2817 }
2818
2819 static int mwl8k_cmd_radio_enable(struct ieee80211_hw *hw)
2820 {
2821         return mwl8k_cmd_radio_control(hw, 1, 0);
2822 }
2823
2824 static int
2825 mwl8k_set_radio_preamble(struct ieee80211_hw *hw, bool short_preamble)
2826 {
2827         struct mwl8k_priv *priv = hw->priv;
2828
2829         priv->radio_short_preamble = short_preamble;
2830
2831         return mwl8k_cmd_radio_control(hw, 1, 1);
2832 }
2833
2834 /*
2835  * CMD_RF_TX_POWER.
2836  */
2837 #define MWL8K_RF_TX_POWER_LEVEL_TOTAL   8
2838
2839 struct mwl8k_cmd_rf_tx_power {
2840         struct mwl8k_cmd_pkt_hdr header;
2841         __le16 action;
2842         __le16 support_level;
2843         __le16 current_level;
2844         __le16 reserved;
2845         __le16 power_level_list[MWL8K_RF_TX_POWER_LEVEL_TOTAL];
2846 } __packed;
2847
2848 static int mwl8k_cmd_rf_tx_power(struct ieee80211_hw *hw, int dBm)
2849 {
2850         struct mwl8k_cmd_rf_tx_power *cmd;
2851         int rc;
2852
2853         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2854         if (cmd == NULL)
2855                 return -ENOMEM;
2856
2857         cmd->header.code = cpu_to_le16(MWL8K_CMD_RF_TX_POWER);
2858         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2859         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
2860         cmd->support_level = cpu_to_le16(dBm);
2861
2862         rc = mwl8k_post_cmd(hw, &cmd->header);
2863         kfree(cmd);
2864
2865         return rc;
2866 }
2867
2868 /*
2869  * CMD_TX_POWER.
2870  */
2871 #define MWL8K_TX_POWER_LEVEL_TOTAL      12
2872
2873 struct mwl8k_cmd_tx_power {
2874         struct mwl8k_cmd_pkt_hdr header;
2875         __le16 action;
2876         __le16 band;
2877         __le16 channel;
2878         __le16 bw;
2879         __le16 sub_ch;
2880         __le16 power_level_list[MWL8K_TX_POWER_LEVEL_TOTAL];
2881 } __packed;
2882
2883 static int mwl8k_cmd_tx_power(struct ieee80211_hw *hw,
2884                                      struct ieee80211_conf *conf,
2885                                      unsigned short pwr)
2886 {
2887         struct ieee80211_channel *channel = conf->chandef.chan;
2888         enum nl80211_channel_type channel_type =
2889                 cfg80211_get_chandef_type(&conf->chandef);
2890         struct mwl8k_cmd_tx_power *cmd;
2891         int rc;
2892         int i;
2893
2894         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2895         if (cmd == NULL)
2896                 return -ENOMEM;
2897
2898         cmd->header.code = cpu_to_le16(MWL8K_CMD_TX_POWER);
2899         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2900         cmd->action = cpu_to_le16(MWL8K_CMD_SET_LIST);
2901
2902         if (channel->band == NL80211_BAND_2GHZ)
2903                 cmd->band = cpu_to_le16(0x1);
2904         else if (channel->band == NL80211_BAND_5GHZ)
2905                 cmd->band = cpu_to_le16(0x4);
2906
2907         cmd->channel = cpu_to_le16(channel->hw_value);
2908
2909         if (channel_type == NL80211_CHAN_NO_HT ||
2910             channel_type == NL80211_CHAN_HT20) {
2911                 cmd->bw = cpu_to_le16(0x2);
2912         } else {
2913                 cmd->bw = cpu_to_le16(0x4);
2914                 if (channel_type == NL80211_CHAN_HT40MINUS)
2915                         cmd->sub_ch = cpu_to_le16(0x3);
2916                 else if (channel_type == NL80211_CHAN_HT40PLUS)
2917                         cmd->sub_ch = cpu_to_le16(0x1);
2918         }
2919
2920         for (i = 0; i < MWL8K_TX_POWER_LEVEL_TOTAL; i++)
2921                 cmd->power_level_list[i] = cpu_to_le16(pwr);
2922
2923         rc = mwl8k_post_cmd(hw, &cmd->header);
2924         kfree(cmd);
2925
2926         return rc;
2927 }
2928
2929 /*
2930  * CMD_RF_ANTENNA.
2931  */
2932 struct mwl8k_cmd_rf_antenna {
2933         struct mwl8k_cmd_pkt_hdr header;
2934         __le16 antenna;
2935         __le16 mode;
2936 } __packed;
2937
2938 #define MWL8K_RF_ANTENNA_RX             1
2939 #define MWL8K_RF_ANTENNA_TX             2
2940
2941 static int
2942 mwl8k_cmd_rf_antenna(struct ieee80211_hw *hw, int antenna, int mask)
2943 {
2944         struct mwl8k_cmd_rf_antenna *cmd;
2945         int rc;
2946
2947         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2948         if (cmd == NULL)
2949                 return -ENOMEM;
2950
2951         cmd->header.code = cpu_to_le16(MWL8K_CMD_RF_ANTENNA);
2952         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2953         cmd->antenna = cpu_to_le16(antenna);
2954         cmd->mode = cpu_to_le16(mask);
2955
2956         rc = mwl8k_post_cmd(hw, &cmd->header);
2957         kfree(cmd);
2958
2959         return rc;
2960 }
2961
2962 /*
2963  * CMD_SET_BEACON.
2964  */
2965 struct mwl8k_cmd_set_beacon {
2966         struct mwl8k_cmd_pkt_hdr header;
2967         __le16 beacon_len;
2968         __u8 beacon[];
2969 };
2970
2971 static int mwl8k_cmd_set_beacon(struct ieee80211_hw *hw,
2972                                 struct ieee80211_vif *vif, u8 *beacon, int len)
2973 {
2974         struct mwl8k_cmd_set_beacon *cmd;
2975         int rc;
2976
2977         cmd = kzalloc(sizeof(*cmd) + len, GFP_KERNEL);
2978         if (cmd == NULL)
2979                 return -ENOMEM;
2980
2981         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_BEACON);
2982         cmd->header.length = cpu_to_le16(sizeof(*cmd) + len);
2983         cmd->beacon_len = cpu_to_le16(len);
2984         memcpy(cmd->beacon, beacon, len);
2985
2986         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
2987         kfree(cmd);
2988
2989         return rc;
2990 }
2991
2992 /*
2993  * CMD_SET_PRE_SCAN.
2994  */
2995 struct mwl8k_cmd_set_pre_scan {
2996         struct mwl8k_cmd_pkt_hdr header;
2997 } __packed;
2998
2999 static int mwl8k_cmd_set_pre_scan(struct ieee80211_hw *hw)
3000 {
3001         struct mwl8k_cmd_set_pre_scan *cmd;
3002         int rc;
3003
3004         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3005         if (cmd == NULL)
3006                 return -ENOMEM;
3007
3008         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_PRE_SCAN);
3009         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3010
3011         rc = mwl8k_post_cmd(hw, &cmd->header);
3012         kfree(cmd);
3013
3014         return rc;
3015 }
3016
3017 /*
3018  * CMD_BBP_REG_ACCESS.
3019  */
3020 struct mwl8k_cmd_bbp_reg_access {
3021         struct mwl8k_cmd_pkt_hdr header;
3022         __le16 action;
3023         __le16 offset;
3024         u8 value;
3025         u8 rsrv[3];
3026 } __packed;
3027
3028 static int
3029 mwl8k_cmd_bbp_reg_access(struct ieee80211_hw *hw,
3030                          u16 action,
3031                          u16 offset,
3032                          u8 *value)
3033 {
3034         struct mwl8k_cmd_bbp_reg_access *cmd;
3035         int rc;
3036
3037         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3038         if (cmd == NULL)
3039                 return -ENOMEM;
3040
3041         cmd->header.code = cpu_to_le16(MWL8K_CMD_BBP_REG_ACCESS);
3042         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3043         cmd->action = cpu_to_le16(action);
3044         cmd->offset = cpu_to_le16(offset);
3045
3046         rc = mwl8k_post_cmd(hw, &cmd->header);
3047
3048         if (!rc)
3049                 *value = cmd->value;
3050         else
3051                 *value = 0;
3052
3053         kfree(cmd);
3054
3055         return rc;
3056 }
3057
3058 /*
3059  * CMD_SET_POST_SCAN.
3060  */
3061 struct mwl8k_cmd_set_post_scan {
3062         struct mwl8k_cmd_pkt_hdr header;
3063         __le32 isibss;
3064         __u8 bssid[ETH_ALEN];
3065 } __packed;
3066
3067 static int
3068 mwl8k_cmd_set_post_scan(struct ieee80211_hw *hw, const __u8 *mac)
3069 {
3070         struct mwl8k_cmd_set_post_scan *cmd;
3071         int rc;
3072
3073         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3074         if (cmd == NULL)
3075                 return -ENOMEM;
3076
3077         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_POST_SCAN);
3078         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3079         cmd->isibss = 0;
3080         memcpy(cmd->bssid, mac, ETH_ALEN);
3081
3082         rc = mwl8k_post_cmd(hw, &cmd->header);
3083         kfree(cmd);
3084
3085         return rc;
3086 }
3087
3088 static int freq_to_idx(struct mwl8k_priv *priv, int freq)
3089 {
3090         struct ieee80211_supported_band *sband;
3091         int band, ch, idx = 0;
3092
3093         for (band = NL80211_BAND_2GHZ; band < NUM_NL80211_BANDS; band++) {
3094                 sband = priv->hw->wiphy->bands[band];
3095                 if (!sband)
3096                         continue;
3097
3098                 for (ch = 0; ch < sband->n_channels; ch++, idx++)
3099                         if (sband->channels[ch].center_freq == freq)
3100                                 goto exit;
3101         }
3102
3103 exit:
3104         return idx;
3105 }
3106
3107 static void mwl8k_update_survey(struct mwl8k_priv *priv,
3108                                 struct ieee80211_channel *channel)
3109 {
3110         u32 cca_cnt, rx_rdy;
3111         s8 nf = 0, idx;
3112         struct survey_info *survey;
3113
3114         idx = freq_to_idx(priv, priv->acs_chan->center_freq);
3115         if (idx >= MWL8K_NUM_CHANS) {
3116                 wiphy_err(priv->hw->wiphy, "Failed to update survey\n");
3117                 return;
3118         }
3119
3120         survey = &priv->survey[idx];
3121
3122         cca_cnt = ioread32(priv->regs + NOK_CCA_CNT_REG);
3123         cca_cnt /= 1000; /* uSecs to mSecs */
3124         survey->time_busy = (u64) cca_cnt;
3125
3126         rx_rdy = ioread32(priv->regs + BBU_RXRDY_CNT_REG);
3127         rx_rdy /= 1000; /* uSecs to mSecs */
3128         survey->time_rx = (u64) rx_rdy;
3129
3130         priv->channel_time = jiffies - priv->channel_time;
3131         survey->time = jiffies_to_msecs(priv->channel_time);
3132
3133         survey->channel = channel;
3134
3135         mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &nf);
3136
3137         /* Make sure sign is negative else ACS  at hostapd fails */
3138         survey->noise = nf * -1;
3139
3140         survey->filled = SURVEY_INFO_NOISE_DBM |
3141                          SURVEY_INFO_TIME |
3142                          SURVEY_INFO_TIME_BUSY |
3143                          SURVEY_INFO_TIME_RX;
3144 }
3145
3146 /*
3147  * CMD_SET_RF_CHANNEL.
3148  */
3149 struct mwl8k_cmd_set_rf_channel {
3150         struct mwl8k_cmd_pkt_hdr header;
3151         __le16 action;
3152         __u8 current_channel;
3153         __le32 channel_flags;
3154 } __packed;
3155
3156 static int mwl8k_cmd_set_rf_channel(struct ieee80211_hw *hw,
3157                                     struct ieee80211_conf *conf)
3158 {
3159         struct ieee80211_channel *channel = conf->chandef.chan;
3160         enum nl80211_channel_type channel_type =
3161                 cfg80211_get_chandef_type(&conf->chandef);
3162         struct mwl8k_cmd_set_rf_channel *cmd;
3163         struct mwl8k_priv *priv = hw->priv;
3164         int rc;
3165
3166         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3167         if (cmd == NULL)
3168                 return -ENOMEM;
3169
3170         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RF_CHANNEL);
3171         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3172         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3173         cmd->current_channel = channel->hw_value;
3174
3175         if (channel->band == NL80211_BAND_2GHZ)
3176                 cmd->channel_flags |= cpu_to_le32(0x00000001);
3177         else if (channel->band == NL80211_BAND_5GHZ)
3178                 cmd->channel_flags |= cpu_to_le32(0x00000004);
3179
3180         if (!priv->sw_scan_start) {
3181                 if (channel_type == NL80211_CHAN_NO_HT ||
3182                     channel_type == NL80211_CHAN_HT20)
3183                         cmd->channel_flags |= cpu_to_le32(0x00000080);
3184                 else if (channel_type == NL80211_CHAN_HT40MINUS)
3185                         cmd->channel_flags |= cpu_to_le32(0x000001900);
3186                 else if (channel_type == NL80211_CHAN_HT40PLUS)
3187                         cmd->channel_flags |= cpu_to_le32(0x000000900);
3188         } else {
3189                 cmd->channel_flags |= cpu_to_le32(0x00000080);
3190         }
3191
3192         if (priv->sw_scan_start) {
3193                 /* Store current channel stats
3194                  * before switching to newer one.
3195                  * This will be processed only for AP fw.
3196                  */
3197                 if (priv->channel_time != 0)
3198                         mwl8k_update_survey(priv, priv->acs_chan);
3199
3200                 priv->channel_time = jiffies;
3201                 priv->acs_chan =  channel;
3202         }
3203
3204         rc = mwl8k_post_cmd(hw, &cmd->header);
3205         kfree(cmd);
3206
3207         return rc;
3208 }
3209
3210 /*
3211  * CMD_SET_AID.
3212  */
3213 #define MWL8K_FRAME_PROT_DISABLED                       0x00
3214 #define MWL8K_FRAME_PROT_11G                            0x07
3215 #define MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY              0x02
3216 #define MWL8K_FRAME_PROT_11N_HT_ALL                     0x06
3217
3218 struct mwl8k_cmd_update_set_aid {
3219         struct mwl8k_cmd_pkt_hdr header;
3220         __le16  aid;
3221
3222          /* AP's MAC address (BSSID) */
3223         __u8    bssid[ETH_ALEN];
3224         __le16  protection_mode;
3225         __u8    supp_rates[14];
3226 } __packed;
3227
3228 static void legacy_rate_mask_to_array(u8 *rates, u32 mask)
3229 {
3230         int i;
3231         int j;
3232
3233         /*
3234          * Clear nonstandard rate 4.
3235          */
3236         mask &= 0x1fef;
3237
3238         for (i = 0, j = 0; i < 13; i++) {
3239                 if (mask & (1 << i))
3240                         rates[j++] = mwl8k_rates_24[i].hw_value;
3241         }
3242 }
3243
3244 static int
3245 mwl8k_cmd_set_aid(struct ieee80211_hw *hw,
3246                   struct ieee80211_vif *vif, u32 legacy_rate_mask)
3247 {
3248         struct mwl8k_cmd_update_set_aid *cmd;
3249         u16 prot_mode;
3250         int rc;
3251
3252         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3253         if (cmd == NULL)
3254                 return -ENOMEM;
3255
3256         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_AID);
3257         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3258         cmd->aid = cpu_to_le16(vif->cfg.aid);
3259         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
3260
3261         if (vif->bss_conf.use_cts_prot) {
3262                 prot_mode = MWL8K_FRAME_PROT_11G;
3263         } else {
3264                 switch (vif->bss_conf.ht_operation_mode &
3265                         IEEE80211_HT_OP_MODE_PROTECTION) {
3266                 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
3267                         prot_mode = MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY;
3268                         break;
3269                 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
3270                         prot_mode = MWL8K_FRAME_PROT_11N_HT_ALL;
3271                         break;
3272                 default:
3273                         prot_mode = MWL8K_FRAME_PROT_DISABLED;
3274                         break;
3275                 }
3276         }
3277         cmd->protection_mode = cpu_to_le16(prot_mode);
3278
3279         legacy_rate_mask_to_array(cmd->supp_rates, legacy_rate_mask);
3280
3281         rc = mwl8k_post_cmd(hw, &cmd->header);
3282         kfree(cmd);
3283
3284         return rc;
3285 }
3286
3287 /*
3288  * CMD_SET_RATE.
3289  */
3290 struct mwl8k_cmd_set_rate {
3291         struct mwl8k_cmd_pkt_hdr header;
3292         __u8    legacy_rates[14];
3293
3294         /* Bitmap for supported MCS codes.  */
3295         __u8    mcs_set[16];
3296         __u8    reserved[16];
3297 } __packed;
3298
3299 static int
3300 mwl8k_cmd_set_rate(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
3301                    u32 legacy_rate_mask, u8 *mcs_rates)
3302 {
3303         struct mwl8k_cmd_set_rate *cmd;
3304         int rc;
3305
3306         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3307         if (cmd == NULL)
3308                 return -ENOMEM;
3309
3310         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATE);
3311         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3312         legacy_rate_mask_to_array(cmd->legacy_rates, legacy_rate_mask);
3313         memcpy(cmd->mcs_set, mcs_rates, 16);
3314
3315         rc = mwl8k_post_cmd(hw, &cmd->header);
3316         kfree(cmd);
3317
3318         return rc;
3319 }
3320
3321 /*
3322  * CMD_FINALIZE_JOIN.
3323  */
3324 #define MWL8K_FJ_BEACON_MAXLEN  128
3325
3326 struct mwl8k_cmd_finalize_join {
3327         struct mwl8k_cmd_pkt_hdr header;
3328         __le32 sleep_interval;  /* Number of beacon periods to sleep */
3329         __u8 beacon_data[MWL8K_FJ_BEACON_MAXLEN];
3330 } __packed;
3331
3332 static int mwl8k_cmd_finalize_join(struct ieee80211_hw *hw, void *frame,
3333                                    int framelen, int dtim)
3334 {
3335         struct mwl8k_cmd_finalize_join *cmd;
3336         struct ieee80211_mgmt *payload = frame;
3337         int payload_len;
3338         int rc;
3339
3340         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3341         if (cmd == NULL)
3342                 return -ENOMEM;
3343
3344         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_FINALIZE_JOIN);
3345         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3346         cmd->sleep_interval = cpu_to_le32(dtim ? dtim : 1);
3347
3348         payload_len = framelen - ieee80211_hdrlen(payload->frame_control);
3349         if (payload_len < 0)
3350                 payload_len = 0;
3351         else if (payload_len > MWL8K_FJ_BEACON_MAXLEN)
3352                 payload_len = MWL8K_FJ_BEACON_MAXLEN;
3353
3354         memcpy(cmd->beacon_data, &payload->u.beacon, payload_len);
3355
3356         rc = mwl8k_post_cmd(hw, &cmd->header);
3357         kfree(cmd);
3358
3359         return rc;
3360 }
3361
3362 /*
3363  * CMD_SET_RTS_THRESHOLD.
3364  */
3365 struct mwl8k_cmd_set_rts_threshold {
3366         struct mwl8k_cmd_pkt_hdr header;
3367         __le16 action;
3368         __le16 threshold;
3369 } __packed;
3370
3371 static int
3372 mwl8k_cmd_set_rts_threshold(struct ieee80211_hw *hw, int rts_thresh)
3373 {
3374         struct mwl8k_cmd_set_rts_threshold *cmd;
3375         int rc;
3376
3377         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3378         if (cmd == NULL)
3379                 return -ENOMEM;
3380
3381         cmd->header.code = cpu_to_le16(MWL8K_CMD_RTS_THRESHOLD);
3382         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3383         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3384         cmd->threshold = cpu_to_le16(rts_thresh);
3385
3386         rc = mwl8k_post_cmd(hw, &cmd->header);
3387         kfree(cmd);
3388
3389         return rc;
3390 }
3391
3392 /*
3393  * CMD_SET_SLOT.
3394  */
3395 struct mwl8k_cmd_set_slot {
3396         struct mwl8k_cmd_pkt_hdr header;
3397         __le16 action;
3398         __u8 short_slot;
3399 } __packed;
3400
3401 static int mwl8k_cmd_set_slot(struct ieee80211_hw *hw, bool short_slot_time)
3402 {
3403         struct mwl8k_cmd_set_slot *cmd;
3404         int rc;
3405
3406         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3407         if (cmd == NULL)
3408                 return -ENOMEM;
3409
3410         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_SLOT);
3411         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3412         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3413         cmd->short_slot = short_slot_time;
3414
3415         rc = mwl8k_post_cmd(hw, &cmd->header);
3416         kfree(cmd);
3417
3418         return rc;
3419 }
3420
3421 /*
3422  * CMD_SET_EDCA_PARAMS.
3423  */
3424 struct mwl8k_cmd_set_edca_params {
3425         struct mwl8k_cmd_pkt_hdr header;
3426
3427         /* See MWL8K_SET_EDCA_XXX below */
3428         __le16 action;
3429
3430         /* TX opportunity in units of 32 us */
3431         __le16 txop;
3432
3433         union {
3434                 struct {
3435                         /* Log exponent of max contention period: 0...15 */
3436                         __le32 log_cw_max;
3437
3438                         /* Log exponent of min contention period: 0...15 */
3439                         __le32 log_cw_min;
3440
3441                         /* Adaptive interframe spacing in units of 32us */
3442                         __u8 aifs;
3443
3444                         /* TX queue to configure */
3445                         __u8 txq;
3446                 } ap;
3447                 struct {
3448                         /* Log exponent of max contention period: 0...15 */
3449                         __u8 log_cw_max;
3450
3451                         /* Log exponent of min contention period: 0...15 */
3452                         __u8 log_cw_min;
3453
3454                         /* Adaptive interframe spacing in units of 32us */
3455                         __u8 aifs;
3456
3457                         /* TX queue to configure */
3458                         __u8 txq;
3459                 } sta;
3460         };
3461 } __packed;
3462
3463 #define MWL8K_SET_EDCA_CW       0x01
3464 #define MWL8K_SET_EDCA_TXOP     0x02
3465 #define MWL8K_SET_EDCA_AIFS     0x04
3466
3467 #define MWL8K_SET_EDCA_ALL      (MWL8K_SET_EDCA_CW | \
3468                                  MWL8K_SET_EDCA_TXOP | \
3469                                  MWL8K_SET_EDCA_AIFS)
3470
3471 static int
3472 mwl8k_cmd_set_edca_params(struct ieee80211_hw *hw, __u8 qnum,
3473                           __u16 cw_min, __u16 cw_max,
3474                           __u8 aifs, __u16 txop)
3475 {
3476         struct mwl8k_priv *priv = hw->priv;
3477         struct mwl8k_cmd_set_edca_params *cmd;
3478         int rc;
3479
3480         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3481         if (cmd == NULL)
3482                 return -ENOMEM;
3483
3484         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_EDCA_PARAMS);
3485         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3486         cmd->action = cpu_to_le16(MWL8K_SET_EDCA_ALL);
3487         cmd->txop = cpu_to_le16(txop);
3488         if (priv->ap_fw) {
3489                 cmd->ap.log_cw_max = cpu_to_le32(ilog2(cw_max + 1));
3490                 cmd->ap.log_cw_min = cpu_to_le32(ilog2(cw_min + 1));
3491                 cmd->ap.aifs = aifs;
3492                 cmd->ap.txq = qnum;
3493         } else {
3494                 cmd->sta.log_cw_max = (u8)ilog2(cw_max + 1);
3495                 cmd->sta.log_cw_min = (u8)ilog2(cw_min + 1);
3496                 cmd->sta.aifs = aifs;
3497                 cmd->sta.txq = qnum;
3498         }
3499
3500         rc = mwl8k_post_cmd(hw, &cmd->header);
3501         kfree(cmd);
3502
3503         return rc;
3504 }
3505
3506 /*
3507  * CMD_SET_WMM_MODE.
3508  */
3509 struct mwl8k_cmd_set_wmm_mode {
3510         struct mwl8k_cmd_pkt_hdr header;
3511         __le16 action;
3512 } __packed;
3513
3514 static int mwl8k_cmd_set_wmm_mode(struct ieee80211_hw *hw, bool enable)
3515 {
3516         struct mwl8k_priv *priv = hw->priv;
3517         struct mwl8k_cmd_set_wmm_mode *cmd;
3518         int rc;
3519
3520         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3521         if (cmd == NULL)
3522                 return -ENOMEM;
3523
3524         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_WMM_MODE);
3525         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3526         cmd->action = cpu_to_le16(!!enable);
3527
3528         rc = mwl8k_post_cmd(hw, &cmd->header);
3529         kfree(cmd);
3530
3531         if (!rc)
3532                 priv->wmm_enabled = enable;
3533
3534         return rc;
3535 }
3536
3537 /*
3538  * CMD_MIMO_CONFIG.
3539  */
3540 struct mwl8k_cmd_mimo_config {
3541         struct mwl8k_cmd_pkt_hdr header;
3542         __le32 action;
3543         __u8 rx_antenna_map;
3544         __u8 tx_antenna_map;
3545 } __packed;
3546
3547 static int mwl8k_cmd_mimo_config(struct ieee80211_hw *hw, __u8 rx, __u8 tx)
3548 {
3549         struct mwl8k_cmd_mimo_config *cmd;
3550         int rc;
3551
3552         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3553         if (cmd == NULL)
3554                 return -ENOMEM;
3555
3556         cmd->header.code = cpu_to_le16(MWL8K_CMD_MIMO_CONFIG);
3557         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3558         cmd->action = cpu_to_le32((u32)MWL8K_CMD_SET);
3559         cmd->rx_antenna_map = rx;
3560         cmd->tx_antenna_map = tx;
3561
3562         rc = mwl8k_post_cmd(hw, &cmd->header);
3563         kfree(cmd);
3564
3565         return rc;
3566 }
3567
3568 /*
3569  * CMD_USE_FIXED_RATE (STA version).
3570  */
3571 struct mwl8k_cmd_use_fixed_rate_sta {
3572         struct mwl8k_cmd_pkt_hdr header;
3573         __le32 action;
3574         __le32 allow_rate_drop;
3575         __le32 num_rates;
3576         struct {
3577                 __le32 is_ht_rate;
3578                 __le32 enable_retry;
3579                 __le32 rate;
3580                 __le32 retry_count;
3581         } rate_entry[8];
3582         __le32 rate_type;
3583         __le32 reserved1;
3584         __le32 reserved2;
3585 } __packed;
3586
3587 #define MWL8K_USE_AUTO_RATE     0x0002
3588 #define MWL8K_UCAST_RATE        0
3589
3590 static int mwl8k_cmd_use_fixed_rate_sta(struct ieee80211_hw *hw)
3591 {
3592         struct mwl8k_cmd_use_fixed_rate_sta *cmd;
3593         int rc;
3594
3595         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3596         if (cmd == NULL)
3597                 return -ENOMEM;
3598
3599         cmd->header.code = cpu_to_le16(MWL8K_CMD_USE_FIXED_RATE);
3600         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3601         cmd->action = cpu_to_le32(MWL8K_USE_AUTO_RATE);
3602         cmd->rate_type = cpu_to_le32(MWL8K_UCAST_RATE);
3603
3604         rc = mwl8k_post_cmd(hw, &cmd->header);
3605         kfree(cmd);
3606
3607         return rc;
3608 }
3609
3610 /*
3611  * CMD_USE_FIXED_RATE (AP version).
3612  */
3613 struct mwl8k_cmd_use_fixed_rate_ap {
3614         struct mwl8k_cmd_pkt_hdr header;
3615         __le32 action;
3616         __le32 allow_rate_drop;
3617         __le32 num_rates;
3618         struct mwl8k_rate_entry_ap {
3619                 __le32 is_ht_rate;
3620                 __le32 enable_retry;
3621                 __le32 rate;
3622                 __le32 retry_count;
3623         } rate_entry[4];
3624         u8 multicast_rate;
3625         u8 multicast_rate_type;
3626         u8 management_rate;
3627 } __packed;
3628
3629 static int
3630 mwl8k_cmd_use_fixed_rate_ap(struct ieee80211_hw *hw, int mcast, int mgmt)
3631 {
3632         struct mwl8k_cmd_use_fixed_rate_ap *cmd;
3633         int rc;
3634
3635         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3636         if (cmd == NULL)
3637                 return -ENOMEM;
3638
3639         cmd->header.code = cpu_to_le16(MWL8K_CMD_USE_FIXED_RATE);
3640         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3641         cmd->action = cpu_to_le32(MWL8K_USE_AUTO_RATE);
3642         cmd->multicast_rate = mcast;
3643         cmd->management_rate = mgmt;
3644
3645         rc = mwl8k_post_cmd(hw, &cmd->header);
3646         kfree(cmd);
3647
3648         return rc;
3649 }
3650
3651 /*
3652  * CMD_ENABLE_SNIFFER.
3653  */
3654 struct mwl8k_cmd_enable_sniffer {
3655         struct mwl8k_cmd_pkt_hdr header;
3656         __le32 action;
3657 } __packed;
3658
3659 static int mwl8k_cmd_enable_sniffer(struct ieee80211_hw *hw, bool enable)
3660 {
3661         struct mwl8k_cmd_enable_sniffer *cmd;
3662         int rc;
3663
3664         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3665         if (cmd == NULL)
3666                 return -ENOMEM;
3667
3668         cmd->header.code = cpu_to_le16(MWL8K_CMD_ENABLE_SNIFFER);
3669         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3670         cmd->action = cpu_to_le32(!!enable);
3671
3672         rc = mwl8k_post_cmd(hw, &cmd->header);
3673         kfree(cmd);
3674
3675         return rc;
3676 }
3677
3678 struct mwl8k_cmd_update_mac_addr {
3679         struct mwl8k_cmd_pkt_hdr header;
3680         union {
3681                 struct {
3682                         __le16 mac_type;
3683                         __u8 mac_addr[ETH_ALEN];
3684                 } mbss;
3685                 __u8 mac_addr[ETH_ALEN];
3686         };
3687 } __packed;
3688
3689 #define MWL8K_MAC_TYPE_PRIMARY_CLIENT           0
3690 #define MWL8K_MAC_TYPE_SECONDARY_CLIENT         1
3691 #define MWL8K_MAC_TYPE_PRIMARY_AP               2
3692 #define MWL8K_MAC_TYPE_SECONDARY_AP             3
3693
3694 static int mwl8k_cmd_update_mac_addr(struct ieee80211_hw *hw,
3695                                   struct ieee80211_vif *vif, u8 *mac, bool set)
3696 {
3697         struct mwl8k_priv *priv = hw->priv;
3698         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
3699         struct mwl8k_cmd_update_mac_addr *cmd;
3700         int mac_type;
3701         int rc;
3702
3703         mac_type = MWL8K_MAC_TYPE_PRIMARY_AP;
3704         if (vif != NULL && vif->type == NL80211_IFTYPE_STATION) {
3705                 if (mwl8k_vif->macid + 1 == ffs(priv->sta_macids_supported))
3706                         if (priv->ap_fw)
3707                                 mac_type = MWL8K_MAC_TYPE_SECONDARY_CLIENT;
3708                         else
3709                                 mac_type = MWL8K_MAC_TYPE_PRIMARY_CLIENT;
3710                 else
3711                         mac_type = MWL8K_MAC_TYPE_SECONDARY_CLIENT;
3712         } else if (vif != NULL && vif->type == NL80211_IFTYPE_AP) {
3713                 if (mwl8k_vif->macid + 1 == ffs(priv->ap_macids_supported))
3714                         mac_type = MWL8K_MAC_TYPE_PRIMARY_AP;
3715                 else
3716                         mac_type = MWL8K_MAC_TYPE_SECONDARY_AP;
3717         }
3718
3719         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3720         if (cmd == NULL)
3721                 return -ENOMEM;
3722
3723         if (set)
3724                 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_MAC_ADDR);
3725         else
3726                 cmd->header.code = cpu_to_le16(MWL8K_CMD_DEL_MAC_ADDR);
3727
3728         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3729         if (priv->ap_fw) {
3730                 cmd->mbss.mac_type = cpu_to_le16(mac_type);
3731                 memcpy(cmd->mbss.mac_addr, mac, ETH_ALEN);
3732         } else {
3733                 memcpy(cmd->mac_addr, mac, ETH_ALEN);
3734         }
3735
3736         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3737         kfree(cmd);
3738
3739         return rc;
3740 }
3741
3742 /*
3743  * MWL8K_CMD_SET_MAC_ADDR.
3744  */
3745 static inline int mwl8k_cmd_set_mac_addr(struct ieee80211_hw *hw,
3746                                   struct ieee80211_vif *vif, u8 *mac)
3747 {
3748         return mwl8k_cmd_update_mac_addr(hw, vif, mac, true);
3749 }
3750
3751 /*
3752  * MWL8K_CMD_DEL_MAC_ADDR.
3753  */
3754 static inline int mwl8k_cmd_del_mac_addr(struct ieee80211_hw *hw,
3755                                   struct ieee80211_vif *vif, u8 *mac)
3756 {
3757         return mwl8k_cmd_update_mac_addr(hw, vif, mac, false);
3758 }
3759
3760 /*
3761  * CMD_SET_RATEADAPT_MODE.
3762  */
3763 struct mwl8k_cmd_set_rate_adapt_mode {
3764         struct mwl8k_cmd_pkt_hdr header;
3765         __le16 action;
3766         __le16 mode;
3767 } __packed;
3768
3769 static int mwl8k_cmd_set_rateadapt_mode(struct ieee80211_hw *hw, __u16 mode)
3770 {
3771         struct mwl8k_cmd_set_rate_adapt_mode *cmd;
3772         int rc;
3773
3774         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3775         if (cmd == NULL)
3776                 return -ENOMEM;
3777
3778         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATEADAPT_MODE);
3779         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3780         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3781         cmd->mode = cpu_to_le16(mode);
3782
3783         rc = mwl8k_post_cmd(hw, &cmd->header);
3784         kfree(cmd);
3785
3786         return rc;
3787 }
3788
3789 /*
3790  * CMD_GET_WATCHDOG_BITMAP.
3791  */
3792 struct mwl8k_cmd_get_watchdog_bitmap {
3793         struct mwl8k_cmd_pkt_hdr header;
3794         u8      bitmap;
3795 } __packed;
3796
3797 static int mwl8k_cmd_get_watchdog_bitmap(struct ieee80211_hw *hw, u8 *bitmap)
3798 {
3799         struct mwl8k_cmd_get_watchdog_bitmap *cmd;
3800         int rc;
3801
3802         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3803         if (cmd == NULL)
3804                 return -ENOMEM;
3805
3806         cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_WATCHDOG_BITMAP);
3807         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3808
3809         rc = mwl8k_post_cmd(hw, &cmd->header);
3810         if (!rc)
3811                 *bitmap = cmd->bitmap;
3812
3813         kfree(cmd);
3814
3815         return rc;
3816 }
3817
3818 #define MWL8K_WMM_QUEUE_NUMBER  3
3819
3820 static void mwl8k_destroy_ba(struct ieee80211_hw *hw,
3821                              u8 idx);
3822
3823 static void mwl8k_watchdog_ba_events(struct work_struct *work)
3824 {
3825         int rc;
3826         u8 bitmap = 0, stream_index;
3827         struct mwl8k_ampdu_stream *streams;
3828         struct mwl8k_priv *priv =
3829                 container_of(work, struct mwl8k_priv, watchdog_ba_handle);
3830         struct ieee80211_hw *hw = priv->hw;
3831         int i;
3832         u32 status = 0;
3833
3834         mwl8k_fw_lock(hw);
3835
3836         rc = mwl8k_cmd_get_watchdog_bitmap(priv->hw, &bitmap);
3837         if (rc)
3838                 goto done;
3839
3840         spin_lock(&priv->stream_lock);
3841
3842         /* the bitmap is the hw queue number.  Map it to the ampdu queue. */
3843         for (i = 0; i < TOTAL_HW_TX_QUEUES; i++) {
3844                 if (bitmap & (1 << i)) {
3845                         stream_index = (i + MWL8K_WMM_QUEUE_NUMBER) %
3846                                        TOTAL_HW_TX_QUEUES;
3847                         streams = &priv->ampdu[stream_index];
3848                         if (streams->state == AMPDU_STREAM_ACTIVE) {
3849                                 ieee80211_stop_tx_ba_session(streams->sta,
3850                                                              streams->tid);
3851                                 spin_unlock(&priv->stream_lock);
3852                                 mwl8k_destroy_ba(hw, stream_index);
3853                                 spin_lock(&priv->stream_lock);
3854                         }
3855                 }
3856         }
3857
3858         spin_unlock(&priv->stream_lock);
3859 done:
3860         atomic_dec(&priv->watchdog_event_pending);
3861         status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
3862         iowrite32((status | MWL8K_A2H_INT_BA_WATCHDOG),
3863                   priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
3864         mwl8k_fw_unlock(hw);
3865         return;
3866 }
3867
3868
3869 /*
3870  * CMD_BSS_START.
3871  */
3872 struct mwl8k_cmd_bss_start {
3873         struct mwl8k_cmd_pkt_hdr header;
3874         __le32 enable;
3875 } __packed;
3876
3877 static int mwl8k_cmd_bss_start(struct ieee80211_hw *hw,
3878                                struct ieee80211_vif *vif, int enable)
3879 {
3880         struct mwl8k_cmd_bss_start *cmd;
3881         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
3882         struct mwl8k_priv *priv = hw->priv;
3883         int rc;
3884
3885         if (enable && (priv->running_bsses & (1 << mwl8k_vif->macid)))
3886                 return 0;
3887
3888         if (!enable && !(priv->running_bsses & (1 << mwl8k_vif->macid)))
3889                 return 0;
3890
3891         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3892         if (cmd == NULL)
3893                 return -ENOMEM;
3894
3895         cmd->header.code = cpu_to_le16(MWL8K_CMD_BSS_START);
3896         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3897         cmd->enable = cpu_to_le32(enable);
3898
3899         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3900         kfree(cmd);
3901
3902         if (!rc) {
3903                 if (enable)
3904                         priv->running_bsses |= (1 << mwl8k_vif->macid);
3905                 else
3906                         priv->running_bsses &= ~(1 << mwl8k_vif->macid);
3907         }
3908         return rc;
3909 }
3910
3911 static void mwl8k_enable_bsses(struct ieee80211_hw *hw, bool enable, u32 bitmap)
3912 {
3913         struct mwl8k_priv *priv = hw->priv;
3914         struct mwl8k_vif *mwl8k_vif, *tmp_vif;
3915         struct ieee80211_vif *vif;
3916
3917         list_for_each_entry_safe(mwl8k_vif, tmp_vif, &priv->vif_list, list) {
3918                 vif = mwl8k_vif->vif;
3919
3920                 if (!(bitmap & (1 << mwl8k_vif->macid)))
3921                         continue;
3922
3923                 if (vif->type == NL80211_IFTYPE_AP)
3924                         mwl8k_cmd_bss_start(hw, vif, enable);
3925         }
3926 }
3927 /*
3928  * CMD_BASTREAM.
3929  */
3930
3931 /*
3932  * UPSTREAM is tx direction
3933  */
3934 #define BASTREAM_FLAG_DIRECTION_UPSTREAM        0x00
3935 #define BASTREAM_FLAG_IMMEDIATE_TYPE            0x01
3936
3937 enum ba_stream_action_type {
3938         MWL8K_BA_CREATE,
3939         MWL8K_BA_UPDATE,
3940         MWL8K_BA_DESTROY,
3941         MWL8K_BA_FLUSH,
3942         MWL8K_BA_CHECK,
3943 };
3944
3945
3946 struct mwl8k_create_ba_stream {
3947         __le32  flags;
3948         __le32  idle_thrs;
3949         __le32  bar_thrs;
3950         __le32  window_size;
3951         u8      peer_mac_addr[6];
3952         u8      dialog_token;
3953         u8      tid;
3954         u8      queue_id;
3955         u8      param_info;
3956         __le32  ba_context;
3957         u8      reset_seq_no_flag;
3958         __le16  curr_seq_no;
3959         u8      sta_src_mac_addr[6];
3960 } __packed;
3961
3962 struct mwl8k_destroy_ba_stream {
3963         __le32  flags;
3964         __le32  ba_context;
3965 } __packed;
3966
3967 struct mwl8k_cmd_bastream {
3968         struct mwl8k_cmd_pkt_hdr        header;
3969         __le32  action;
3970         union {
3971                 struct mwl8k_create_ba_stream   create_params;
3972                 struct mwl8k_destroy_ba_stream  destroy_params;
3973         };
3974 } __packed;
3975
3976 static int
3977 mwl8k_check_ba(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream,
3978                struct ieee80211_vif *vif)
3979 {
3980         struct mwl8k_cmd_bastream *cmd;
3981         int rc;
3982
3983         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3984         if (cmd == NULL)
3985                 return -ENOMEM;
3986
3987         cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
3988         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3989
3990         cmd->action = cpu_to_le32(MWL8K_BA_CHECK);
3991
3992         cmd->create_params.queue_id = stream->idx;
3993         memcpy(&cmd->create_params.peer_mac_addr[0], stream->sta->addr,
3994                ETH_ALEN);
3995         cmd->create_params.tid = stream->tid;
3996
3997         cmd->create_params.flags =
3998                 cpu_to_le32(BASTREAM_FLAG_IMMEDIATE_TYPE) |
3999                 cpu_to_le32(BASTREAM_FLAG_DIRECTION_UPSTREAM);
4000
4001         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4002
4003         kfree(cmd);
4004
4005         return rc;
4006 }
4007
4008 static int
4009 mwl8k_create_ba(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream,
4010                 u8 buf_size, struct ieee80211_vif *vif)
4011 {
4012         struct mwl8k_cmd_bastream *cmd;
4013         int rc;
4014
4015         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4016         if (cmd == NULL)
4017                 return -ENOMEM;
4018
4019
4020         cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
4021         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4022
4023         cmd->action = cpu_to_le32(MWL8K_BA_CREATE);
4024
4025         cmd->create_params.bar_thrs = cpu_to_le32((u32)buf_size);
4026         cmd->create_params.window_size = cpu_to_le32((u32)buf_size);
4027         cmd->create_params.queue_id = stream->idx;
4028
4029         memcpy(cmd->create_params.peer_mac_addr, stream->sta->addr, ETH_ALEN);
4030         cmd->create_params.tid = stream->tid;
4031         cmd->create_params.curr_seq_no = cpu_to_le16(0);
4032         cmd->create_params.reset_seq_no_flag = 1;
4033
4034         cmd->create_params.param_info =
4035                 (stream->sta->deflink.ht_cap.ampdu_factor &
4036                  IEEE80211_HT_AMPDU_PARM_FACTOR) |
4037                 ((stream->sta->deflink.ht_cap.ampdu_density << 2) &
4038                  IEEE80211_HT_AMPDU_PARM_DENSITY);
4039
4040         cmd->create_params.flags =
4041                 cpu_to_le32(BASTREAM_FLAG_IMMEDIATE_TYPE |
4042                                         BASTREAM_FLAG_DIRECTION_UPSTREAM);
4043
4044         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4045
4046         wiphy_debug(hw->wiphy, "Created a BA stream for %pM : tid %d\n",
4047                 stream->sta->addr, stream->tid);
4048         kfree(cmd);
4049
4050         return rc;
4051 }
4052
4053 static void mwl8k_destroy_ba(struct ieee80211_hw *hw,
4054                              u8 idx)
4055 {
4056         struct mwl8k_cmd_bastream *cmd;
4057
4058         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4059         if (cmd == NULL)
4060                 return;
4061
4062         cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
4063         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4064         cmd->action = cpu_to_le32(MWL8K_BA_DESTROY);
4065
4066         cmd->destroy_params.ba_context = cpu_to_le32(idx);
4067         mwl8k_post_cmd(hw, &cmd->header);
4068
4069         wiphy_debug(hw->wiphy, "Deleted BA stream index %d\n", idx);
4070
4071         kfree(cmd);
4072 }
4073
4074 /*
4075  * CMD_SET_NEW_STN.
4076  */
4077 struct mwl8k_cmd_set_new_stn {
4078         struct mwl8k_cmd_pkt_hdr header;
4079         __le16 aid;
4080         __u8 mac_addr[6];
4081         __le16 stn_id;
4082         __le16 action;
4083         __le16 rsvd;
4084         __le32 legacy_rates;
4085         __u8 ht_rates[4];
4086         __le16 cap_info;
4087         __le16 ht_capabilities_info;
4088         __u8 mac_ht_param_info;
4089         __u8 rev;
4090         __u8 control_channel;
4091         __u8 add_channel;
4092         __le16 op_mode;
4093         __le16 stbc;
4094         __u8 add_qos_info;
4095         __u8 is_qos_sta;
4096         __le32 fw_sta_ptr;
4097 } __packed;
4098
4099 #define MWL8K_STA_ACTION_ADD            0
4100 #define MWL8K_STA_ACTION_REMOVE         2
4101
4102 static int mwl8k_cmd_set_new_stn_add(struct ieee80211_hw *hw,
4103                                      struct ieee80211_vif *vif,
4104                                      struct ieee80211_sta *sta)
4105 {
4106         struct mwl8k_cmd_set_new_stn *cmd;
4107         u32 rates;
4108         int rc;
4109
4110         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4111         if (cmd == NULL)
4112                 return -ENOMEM;
4113
4114         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4115         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4116         cmd->aid = cpu_to_le16(sta->aid);
4117         memcpy(cmd->mac_addr, sta->addr, ETH_ALEN);
4118         cmd->stn_id = cpu_to_le16(sta->aid);
4119         cmd->action = cpu_to_le16(MWL8K_STA_ACTION_ADD);
4120         if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ)
4121                 rates = sta->deflink.supp_rates[NL80211_BAND_2GHZ];
4122         else
4123                 rates = sta->deflink.supp_rates[NL80211_BAND_5GHZ] << 5;
4124         cmd->legacy_rates = cpu_to_le32(rates);
4125         if (sta->deflink.ht_cap.ht_supported) {
4126                 cmd->ht_rates[0] = sta->deflink.ht_cap.mcs.rx_mask[0];
4127                 cmd->ht_rates[1] = sta->deflink.ht_cap.mcs.rx_mask[1];
4128                 cmd->ht_rates[2] = sta->deflink.ht_cap.mcs.rx_mask[2];
4129                 cmd->ht_rates[3] = sta->deflink.ht_cap.mcs.rx_mask[3];
4130                 cmd->ht_capabilities_info = cpu_to_le16(sta->deflink.ht_cap.cap);
4131                 cmd->mac_ht_param_info = (sta->deflink.ht_cap.ampdu_factor & 3) |
4132                         ((sta->deflink.ht_cap.ampdu_density & 7) << 2);
4133                 cmd->is_qos_sta = 1;
4134         }
4135
4136         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4137         kfree(cmd);
4138
4139         return rc;
4140 }
4141
4142 static int mwl8k_cmd_set_new_stn_add_self(struct ieee80211_hw *hw,
4143                                           struct ieee80211_vif *vif)
4144 {
4145         struct mwl8k_cmd_set_new_stn *cmd;
4146         int rc;
4147
4148         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4149         if (cmd == NULL)
4150                 return -ENOMEM;
4151
4152         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4153         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4154         memcpy(cmd->mac_addr, vif->addr, ETH_ALEN);
4155
4156         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4157         kfree(cmd);
4158
4159         return rc;
4160 }
4161
4162 static int mwl8k_cmd_set_new_stn_del(struct ieee80211_hw *hw,
4163                                      struct ieee80211_vif *vif, u8 *addr)
4164 {
4165         struct mwl8k_cmd_set_new_stn *cmd;
4166         struct mwl8k_priv *priv = hw->priv;
4167         int rc, i;
4168         u8 idx;
4169
4170         spin_lock(&priv->stream_lock);
4171         /* Destroy any active ampdu streams for this sta */
4172         for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
4173                 struct mwl8k_ampdu_stream *s;
4174                 s = &priv->ampdu[i];
4175                 if (s->state != AMPDU_NO_STREAM) {
4176                         if (memcmp(s->sta->addr, addr, ETH_ALEN) == 0) {
4177                                 if (s->state == AMPDU_STREAM_ACTIVE) {
4178                                         idx = s->idx;
4179                                         spin_unlock(&priv->stream_lock);
4180                                         mwl8k_destroy_ba(hw, idx);
4181                                         spin_lock(&priv->stream_lock);
4182                                 } else if (s->state == AMPDU_STREAM_NEW) {
4183                                         mwl8k_remove_stream(hw, s);
4184                                 }
4185                         }
4186                 }
4187         }
4188
4189         spin_unlock(&priv->stream_lock);
4190
4191         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4192         if (cmd == NULL)
4193                 return -ENOMEM;
4194
4195         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4196         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4197         memcpy(cmd->mac_addr, addr, ETH_ALEN);
4198         cmd->action = cpu_to_le16(MWL8K_STA_ACTION_REMOVE);
4199
4200         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4201         kfree(cmd);
4202
4203         return rc;
4204 }
4205
4206 /*
4207  * CMD_UPDATE_ENCRYPTION.
4208  */
4209
4210 #define MAX_ENCR_KEY_LENGTH     16
4211 #define MIC_KEY_LENGTH          8
4212
4213 struct mwl8k_cmd_update_encryption {
4214         struct mwl8k_cmd_pkt_hdr header;
4215
4216         __le32 action;
4217         __le32 reserved;
4218         __u8 mac_addr[6];
4219         __u8 encr_type;
4220
4221 } __packed;
4222
4223 struct mwl8k_cmd_set_key {
4224         struct mwl8k_cmd_pkt_hdr header;
4225
4226         __le32 action;
4227         __le32 reserved;
4228         __le16 length;
4229         __le16 key_type_id;
4230         __le32 key_info;
4231         __le32 key_id;
4232         __le16 key_len;
4233         struct {
4234                 __u8 key_material[MAX_ENCR_KEY_LENGTH];
4235                 __u8 tkip_tx_mic_key[MIC_KEY_LENGTH];
4236                 __u8 tkip_rx_mic_key[MIC_KEY_LENGTH];
4237         } tkip;
4238         __le16 tkip_rsc_low;
4239         __le32 tkip_rsc_high;
4240         __le16 tkip_tsc_low;
4241         __le32 tkip_tsc_high;
4242         __u8 mac_addr[6];
4243 } __packed;
4244
4245 enum {
4246         MWL8K_ENCR_ENABLE,
4247         MWL8K_ENCR_SET_KEY,
4248         MWL8K_ENCR_REMOVE_KEY,
4249         MWL8K_ENCR_SET_GROUP_KEY,
4250 };
4251
4252 #define MWL8K_UPDATE_ENCRYPTION_TYPE_WEP        0
4253 #define MWL8K_UPDATE_ENCRYPTION_TYPE_DISABLE    1
4254 #define MWL8K_UPDATE_ENCRYPTION_TYPE_TKIP       4
4255 #define MWL8K_UPDATE_ENCRYPTION_TYPE_MIXED      7
4256 #define MWL8K_UPDATE_ENCRYPTION_TYPE_AES        8
4257
4258 enum {
4259         MWL8K_ALG_WEP,
4260         MWL8K_ALG_TKIP,
4261         MWL8K_ALG_CCMP,
4262 };
4263
4264 #define MWL8K_KEY_FLAG_TXGROUPKEY       0x00000004
4265 #define MWL8K_KEY_FLAG_PAIRWISE         0x00000008
4266 #define MWL8K_KEY_FLAG_TSC_VALID        0x00000040
4267 #define MWL8K_KEY_FLAG_WEP_TXKEY        0x01000000
4268 #define MWL8K_KEY_FLAG_MICKEY_VALID     0x02000000
4269
4270 static int mwl8k_cmd_update_encryption_enable(struct ieee80211_hw *hw,
4271                                               struct ieee80211_vif *vif,
4272                                               u8 *addr,
4273                                               u8 encr_type)
4274 {
4275         struct mwl8k_cmd_update_encryption *cmd;
4276         int rc;
4277
4278         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4279         if (cmd == NULL)
4280                 return -ENOMEM;
4281
4282         cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_ENCRYPTION);
4283         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4284         cmd->action = cpu_to_le32(MWL8K_ENCR_ENABLE);
4285         memcpy(cmd->mac_addr, addr, ETH_ALEN);
4286         cmd->encr_type = encr_type;
4287
4288         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4289         kfree(cmd);
4290
4291         return rc;
4292 }
4293
4294 static int mwl8k_encryption_set_cmd_info(struct mwl8k_cmd_set_key *cmd,
4295                                                 u8 *addr,
4296                                                 struct ieee80211_key_conf *key)
4297 {
4298         cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_ENCRYPTION);
4299         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4300         cmd->length = cpu_to_le16(sizeof(*cmd) -
4301                                 offsetof(struct mwl8k_cmd_set_key, length));
4302         cmd->key_id = cpu_to_le32(key->keyidx);
4303         cmd->key_len = cpu_to_le16(key->keylen);
4304         memcpy(cmd->mac_addr, addr, ETH_ALEN);
4305
4306         switch (key->cipher) {
4307         case WLAN_CIPHER_SUITE_WEP40:
4308         case WLAN_CIPHER_SUITE_WEP104:
4309                 cmd->key_type_id = cpu_to_le16(MWL8K_ALG_WEP);
4310                 if (key->keyidx == 0)
4311                         cmd->key_info = cpu_to_le32(MWL8K_KEY_FLAG_WEP_TXKEY);
4312
4313                 break;
4314         case WLAN_CIPHER_SUITE_TKIP:
4315                 cmd->key_type_id = cpu_to_le16(MWL8K_ALG_TKIP);
4316                 cmd->key_info = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4317                         ? cpu_to_le32(MWL8K_KEY_FLAG_PAIRWISE)
4318                         : cpu_to_le32(MWL8K_KEY_FLAG_TXGROUPKEY);
4319                 cmd->key_info |= cpu_to_le32(MWL8K_KEY_FLAG_MICKEY_VALID
4320                                                 | MWL8K_KEY_FLAG_TSC_VALID);
4321                 break;
4322         case WLAN_CIPHER_SUITE_CCMP:
4323                 cmd->key_type_id = cpu_to_le16(MWL8K_ALG_CCMP);
4324                 cmd->key_info = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4325                         ? cpu_to_le32(MWL8K_KEY_FLAG_PAIRWISE)
4326                         : cpu_to_le32(MWL8K_KEY_FLAG_TXGROUPKEY);
4327                 break;
4328         default:
4329                 return -ENOTSUPP;
4330         }
4331
4332         return 0;
4333 }
4334
4335 static int mwl8k_cmd_encryption_set_key(struct ieee80211_hw *hw,
4336                                                 struct ieee80211_vif *vif,
4337                                                 u8 *addr,
4338                                                 struct ieee80211_key_conf *key)
4339 {
4340         struct mwl8k_cmd_set_key *cmd;
4341         int rc;
4342         int keymlen;
4343         u32 action;
4344         u8 idx;
4345         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4346
4347         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4348         if (cmd == NULL)
4349                 return -ENOMEM;
4350
4351         rc = mwl8k_encryption_set_cmd_info(cmd, addr, key);
4352         if (rc < 0)
4353                 goto done;
4354
4355         idx = key->keyidx;
4356
4357         if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4358                 action = MWL8K_ENCR_SET_KEY;
4359         else
4360                 action = MWL8K_ENCR_SET_GROUP_KEY;
4361
4362         switch (key->cipher) {
4363         case WLAN_CIPHER_SUITE_WEP40:
4364         case WLAN_CIPHER_SUITE_WEP104:
4365                 if (!mwl8k_vif->wep_key_conf[idx].enabled) {
4366                         memcpy(mwl8k_vif->wep_key_conf[idx].key, key,
4367                                                 sizeof(*key) + key->keylen);
4368                         mwl8k_vif->wep_key_conf[idx].enabled = 1;
4369                 }
4370
4371                 keymlen = key->keylen;
4372                 action = MWL8K_ENCR_SET_KEY;
4373                 break;
4374         case WLAN_CIPHER_SUITE_TKIP:
4375                 keymlen = MAX_ENCR_KEY_LENGTH + 2 * MIC_KEY_LENGTH;
4376                 break;
4377         case WLAN_CIPHER_SUITE_CCMP:
4378                 keymlen = key->keylen;
4379                 break;
4380         default:
4381                 rc = -ENOTSUPP;
4382                 goto done;
4383         }
4384
4385         memcpy(&cmd->tkip, key->key, keymlen);
4386         cmd->action = cpu_to_le32(action);
4387
4388         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4389 done:
4390         kfree(cmd);
4391
4392         return rc;
4393 }
4394
4395 static int mwl8k_cmd_encryption_remove_key(struct ieee80211_hw *hw,
4396                                                 struct ieee80211_vif *vif,
4397                                                 u8 *addr,
4398                                                 struct ieee80211_key_conf *key)
4399 {
4400         struct mwl8k_cmd_set_key *cmd;
4401         int rc;
4402         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4403
4404         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4405         if (cmd == NULL)
4406                 return -ENOMEM;
4407
4408         rc = mwl8k_encryption_set_cmd_info(cmd, addr, key);
4409         if (rc < 0)
4410                 goto done;
4411
4412         if (key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
4413                         key->cipher == WLAN_CIPHER_SUITE_WEP104)
4414                 mwl8k_vif->wep_key_conf[key->keyidx].enabled = 0;
4415
4416         cmd->action = cpu_to_le32(MWL8K_ENCR_REMOVE_KEY);
4417
4418         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4419 done:
4420         kfree(cmd);
4421
4422         return rc;
4423 }
4424
4425 static int mwl8k_set_key(struct ieee80211_hw *hw,
4426                          enum set_key_cmd cmd_param,
4427                          struct ieee80211_vif *vif,
4428                          struct ieee80211_sta *sta,
4429                          struct ieee80211_key_conf *key)
4430 {
4431         int rc = 0;
4432         u8 encr_type;
4433         u8 *addr;
4434         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4435         struct mwl8k_priv *priv = hw->priv;
4436
4437         if (vif->type == NL80211_IFTYPE_STATION && !priv->ap_fw)
4438                 return -EOPNOTSUPP;
4439
4440         if (sta == NULL)
4441                 addr = vif->addr;
4442         else
4443                 addr = sta->addr;
4444
4445         if (cmd_param == SET_KEY) {
4446                 rc = mwl8k_cmd_encryption_set_key(hw, vif, addr, key);
4447                 if (rc)
4448                         goto out;
4449
4450                 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40)
4451                                 || (key->cipher == WLAN_CIPHER_SUITE_WEP104))
4452                         encr_type = MWL8K_UPDATE_ENCRYPTION_TYPE_WEP;
4453                 else
4454                         encr_type = MWL8K_UPDATE_ENCRYPTION_TYPE_MIXED;
4455
4456                 rc = mwl8k_cmd_update_encryption_enable(hw, vif, addr,
4457                                                                 encr_type);
4458                 if (rc)
4459                         goto out;
4460
4461                 mwl8k_vif->is_hw_crypto_enabled = true;
4462
4463         } else {
4464                 rc = mwl8k_cmd_encryption_remove_key(hw, vif, addr, key);
4465
4466                 if (rc)
4467                         goto out;
4468         }
4469 out:
4470         return rc;
4471 }
4472
4473 /*
4474  * CMD_UPDATE_STADB.
4475  */
4476 struct ewc_ht_info {
4477         __le16  control1;
4478         __le16  control2;
4479         __le16  control3;
4480 } __packed;
4481
4482 struct peer_capability_info {
4483         /* Peer type - AP vs. STA.  */
4484         __u8    peer_type;
4485
4486         /* Basic 802.11 capabilities from assoc resp.  */
4487         __le16  basic_caps;
4488
4489         /* Set if peer supports 802.11n high throughput (HT).  */
4490         __u8    ht_support;
4491
4492         /* Valid if HT is supported.  */
4493         __le16  ht_caps;
4494         __u8    extended_ht_caps;
4495         struct ewc_ht_info      ewc_info;
4496
4497         /* Legacy rate table. Intersection of our rates and peer rates.  */
4498         __u8    legacy_rates[12];
4499
4500         /* HT rate table. Intersection of our rates and peer rates.  */
4501         __u8    ht_rates[16];
4502         __u8    pad[16];
4503
4504         /* If set, interoperability mode, no proprietary extensions.  */
4505         __u8    interop;
4506         __u8    pad2;
4507         __u8    station_id;
4508         __le16  amsdu_enabled;
4509 } __packed;
4510
4511 struct mwl8k_cmd_update_stadb {
4512         struct mwl8k_cmd_pkt_hdr header;
4513
4514         /* See STADB_ACTION_TYPE */
4515         __le32  action;
4516
4517         /* Peer MAC address */
4518         __u8    peer_addr[ETH_ALEN];
4519
4520         __le32  reserved;
4521
4522         /* Peer info - valid during add/update.  */
4523         struct peer_capability_info     peer_info;
4524 } __packed;
4525
4526 #define MWL8K_STA_DB_MODIFY_ENTRY       1
4527 #define MWL8K_STA_DB_DEL_ENTRY          2
4528
4529 /* Peer Entry flags - used to define the type of the peer node */
4530 #define MWL8K_PEER_TYPE_ACCESSPOINT     2
4531
4532 static int mwl8k_cmd_update_stadb_add(struct ieee80211_hw *hw,
4533                                       struct ieee80211_vif *vif,
4534                                       struct ieee80211_sta *sta)
4535 {
4536         struct mwl8k_cmd_update_stadb *cmd;
4537         struct peer_capability_info *p;
4538         u32 rates;
4539         int rc;
4540
4541         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4542         if (cmd == NULL)
4543                 return -ENOMEM;
4544
4545         cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_STADB);
4546         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4547         cmd->action = cpu_to_le32(MWL8K_STA_DB_MODIFY_ENTRY);
4548         memcpy(cmd->peer_addr, sta->addr, ETH_ALEN);
4549
4550         p = &cmd->peer_info;
4551         p->peer_type = MWL8K_PEER_TYPE_ACCESSPOINT;
4552         p->basic_caps = cpu_to_le16(vif->bss_conf.assoc_capability);
4553         p->ht_support = sta->deflink.ht_cap.ht_supported;
4554         p->ht_caps = cpu_to_le16(sta->deflink.ht_cap.cap);
4555         p->extended_ht_caps = (sta->deflink.ht_cap.ampdu_factor & 3) |
4556                 ((sta->deflink.ht_cap.ampdu_density & 7) << 2);
4557         if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ)
4558                 rates = sta->deflink.supp_rates[NL80211_BAND_2GHZ];
4559         else
4560                 rates = sta->deflink.supp_rates[NL80211_BAND_5GHZ] << 5;
4561         legacy_rate_mask_to_array(p->legacy_rates, rates);
4562         memcpy(p->ht_rates, &sta->deflink.ht_cap.mcs, 16);
4563         p->interop = 1;
4564         p->amsdu_enabled = 0;
4565
4566         rc = mwl8k_post_cmd(hw, &cmd->header);
4567         if (!rc)
4568                 rc = p->station_id;
4569         kfree(cmd);
4570
4571         return rc;
4572 }
4573
4574 static int mwl8k_cmd_update_stadb_del(struct ieee80211_hw *hw,
4575                                       struct ieee80211_vif *vif, u8 *addr)
4576 {
4577         struct mwl8k_cmd_update_stadb *cmd;
4578         int rc;
4579
4580         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4581         if (cmd == NULL)
4582                 return -ENOMEM;
4583
4584         cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_STADB);
4585         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4586         cmd->action = cpu_to_le32(MWL8K_STA_DB_DEL_ENTRY);
4587         memcpy(cmd->peer_addr, addr, ETH_ALEN);
4588
4589         rc = mwl8k_post_cmd(hw, &cmd->header);
4590         kfree(cmd);
4591
4592         return rc;
4593 }
4594
4595
4596 /*
4597  * Interrupt handling.
4598  */
4599 static irqreturn_t mwl8k_interrupt(int irq, void *dev_id)
4600 {
4601         struct ieee80211_hw *hw = dev_id;
4602         struct mwl8k_priv *priv = hw->priv;
4603         u32 status;
4604
4605         status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4606         if (!status)
4607                 return IRQ_NONE;
4608
4609         if (status & MWL8K_A2H_INT_TX_DONE) {
4610                 status &= ~MWL8K_A2H_INT_TX_DONE;
4611                 tasklet_schedule(&priv->poll_tx_task);
4612         }
4613
4614         if (status & MWL8K_A2H_INT_RX_READY) {
4615                 status &= ~MWL8K_A2H_INT_RX_READY;
4616                 tasklet_schedule(&priv->poll_rx_task);
4617         }
4618
4619         if (status & MWL8K_A2H_INT_BA_WATCHDOG) {
4620                 iowrite32(~MWL8K_A2H_INT_BA_WATCHDOG,
4621                           priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
4622
4623                 atomic_inc(&priv->watchdog_event_pending);
4624                 status &= ~MWL8K_A2H_INT_BA_WATCHDOG;
4625                 ieee80211_queue_work(hw, &priv->watchdog_ba_handle);
4626         }
4627
4628         if (status)
4629                 iowrite32(~status, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4630
4631         if (status & MWL8K_A2H_INT_OPC_DONE) {
4632                 if (priv->hostcmd_wait != NULL)
4633                         complete(priv->hostcmd_wait);
4634         }
4635
4636         if (status & MWL8K_A2H_INT_QUEUE_EMPTY) {
4637                 if (!mutex_is_locked(&priv->fw_mutex) &&
4638                     priv->radio_on && priv->pending_tx_pkts)
4639                         mwl8k_tx_start(priv);
4640         }
4641
4642         return IRQ_HANDLED;
4643 }
4644
4645 static void mwl8k_tx_poll(struct tasklet_struct *t)
4646 {
4647         struct mwl8k_priv *priv = from_tasklet(priv, t, poll_tx_task);
4648         struct ieee80211_hw *hw = pci_get_drvdata(priv->pdev);
4649         int limit;
4650         int i;
4651
4652         limit = 32;
4653
4654         spin_lock(&priv->tx_lock);
4655
4656         for (i = 0; i < mwl8k_tx_queues(priv); i++)
4657                 limit -= mwl8k_txq_reclaim(hw, i, limit, 0);
4658
4659         if (!priv->pending_tx_pkts && priv->tx_wait != NULL) {
4660                 complete(priv->tx_wait);
4661                 priv->tx_wait = NULL;
4662         }
4663
4664         spin_unlock(&priv->tx_lock);
4665
4666         if (limit) {
4667                 writel(~MWL8K_A2H_INT_TX_DONE,
4668                        priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4669         } else {
4670                 tasklet_schedule(&priv->poll_tx_task);
4671         }
4672 }
4673
4674 static void mwl8k_rx_poll(struct tasklet_struct *t)
4675 {
4676         struct mwl8k_priv *priv = from_tasklet(priv, t, poll_rx_task);
4677         struct ieee80211_hw *hw = pci_get_drvdata(priv->pdev);
4678         int limit;
4679
4680         limit = 32;
4681         limit -= rxq_process(hw, 0, limit);
4682         limit -= rxq_refill(hw, 0, limit);
4683
4684         if (limit) {
4685                 writel(~MWL8K_A2H_INT_RX_READY,
4686                        priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4687         } else {
4688                 tasklet_schedule(&priv->poll_rx_task);
4689         }
4690 }
4691
4692
4693 /*
4694  * Core driver operations.
4695  */
4696 static void mwl8k_tx(struct ieee80211_hw *hw,
4697                      struct ieee80211_tx_control *control,
4698                      struct sk_buff *skb)
4699 {
4700         struct mwl8k_priv *priv = hw->priv;
4701         int index = skb_get_queue_mapping(skb);
4702
4703         if (!priv->radio_on) {
4704                 wiphy_debug(hw->wiphy,
4705                             "dropped TX frame since radio disabled\n");
4706                 dev_kfree_skb(skb);
4707                 return;
4708         }
4709
4710         mwl8k_txq_xmit(hw, index, control->sta, skb);
4711 }
4712
4713 static int mwl8k_start(struct ieee80211_hw *hw)
4714 {
4715         struct mwl8k_priv *priv = hw->priv;
4716         int rc;
4717
4718         rc = request_irq(priv->pdev->irq, mwl8k_interrupt,
4719                          IRQF_SHARED, MWL8K_NAME, hw);
4720         if (rc) {
4721                 priv->irq = -1;
4722                 wiphy_err(hw->wiphy, "failed to register IRQ handler\n");
4723                 return -EIO;
4724         }
4725         priv->irq = priv->pdev->irq;
4726
4727         /* Enable TX reclaim and RX tasklets.  */
4728         tasklet_enable(&priv->poll_tx_task);
4729         tasklet_enable(&priv->poll_rx_task);
4730
4731         /* Enable interrupts */
4732         iowrite32(MWL8K_A2H_EVENTS, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4733         iowrite32(MWL8K_A2H_EVENTS,
4734                   priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
4735
4736         rc = mwl8k_fw_lock(hw);
4737         if (!rc) {
4738                 rc = mwl8k_cmd_radio_enable(hw);
4739
4740                 if (!priv->ap_fw) {
4741                         if (!rc)
4742                                 rc = mwl8k_cmd_enable_sniffer(hw, 0);
4743
4744                         if (!rc)
4745                                 rc = mwl8k_cmd_set_pre_scan(hw);
4746
4747                         if (!rc)
4748                                 rc = mwl8k_cmd_set_post_scan(hw,
4749                                                 "\x00\x00\x00\x00\x00\x00");
4750                 }
4751
4752                 if (!rc)
4753                         rc = mwl8k_cmd_set_rateadapt_mode(hw, 0);
4754
4755                 if (!rc)
4756                         rc = mwl8k_cmd_set_wmm_mode(hw, 0);
4757
4758                 mwl8k_fw_unlock(hw);
4759         }
4760
4761         if (rc) {
4762                 iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4763                 free_irq(priv->pdev->irq, hw);
4764                 priv->irq = -1;
4765                 tasklet_disable(&priv->poll_tx_task);
4766                 tasklet_disable(&priv->poll_rx_task);
4767         } else {
4768                 ieee80211_wake_queues(hw);
4769         }
4770
4771         return rc;
4772 }
4773
4774 static void mwl8k_stop(struct ieee80211_hw *hw, bool suspend)
4775 {
4776         struct mwl8k_priv *priv = hw->priv;
4777         int i;
4778
4779         if (!priv->hw_restart_in_progress)
4780                 mwl8k_cmd_radio_disable(hw);
4781
4782         ieee80211_stop_queues(hw);
4783
4784         /* Disable interrupts */
4785         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4786         if (priv->irq != -1) {
4787                 free_irq(priv->pdev->irq, hw);
4788                 priv->irq = -1;
4789         }
4790
4791         /* Stop finalize join worker */
4792         cancel_work_sync(&priv->finalize_join_worker);
4793         cancel_work_sync(&priv->watchdog_ba_handle);
4794         if (priv->beacon_skb != NULL)
4795                 dev_kfree_skb(priv->beacon_skb);
4796
4797         /* Stop TX reclaim and RX tasklets.  */
4798         tasklet_disable(&priv->poll_tx_task);
4799         tasklet_disable(&priv->poll_rx_task);
4800
4801         /* Return all skbs to mac80211 */
4802         for (i = 0; i < mwl8k_tx_queues(priv); i++)
4803                 mwl8k_txq_reclaim(hw, i, INT_MAX, 1);
4804 }
4805
4806 static int mwl8k_reload_firmware(struct ieee80211_hw *hw, char *fw_image);
4807
4808 static int mwl8k_add_interface(struct ieee80211_hw *hw,
4809                                struct ieee80211_vif *vif)
4810 {
4811         struct mwl8k_priv *priv = hw->priv;
4812         struct mwl8k_vif *mwl8k_vif;
4813         u32 macids_supported;
4814         int macid, rc;
4815         struct mwl8k_device_info *di;
4816
4817         /*
4818          * Reject interface creation if sniffer mode is active, as
4819          * STA operation is mutually exclusive with hardware sniffer
4820          * mode.  (Sniffer mode is only used on STA firmware.)
4821          */
4822         if (priv->sniffer_enabled) {
4823                 wiphy_info(hw->wiphy,
4824                            "unable to create STA interface because sniffer mode is enabled\n");
4825                 return -EINVAL;
4826         }
4827
4828         di = priv->device_info;
4829         switch (vif->type) {
4830         case NL80211_IFTYPE_AP:
4831                 if (!priv->ap_fw && di->fw_image_ap) {
4832                         /* we must load the ap fw to meet this request */
4833                         if (!list_empty(&priv->vif_list))
4834                                 return -EBUSY;
4835                         rc = mwl8k_reload_firmware(hw, di->fw_image_ap);
4836                         if (rc)
4837                                 return rc;
4838                 }
4839                 macids_supported = priv->ap_macids_supported;
4840                 break;
4841         case NL80211_IFTYPE_STATION:
4842                 if (priv->ap_fw && di->fw_image_sta) {
4843                         if (!list_empty(&priv->vif_list)) {
4844                                 wiphy_warn(hw->wiphy, "AP interface is running.\n"
4845                                            "Adding STA interface for WDS");
4846                         } else {
4847                                 /* we must load the sta fw to
4848                                  * meet this request.
4849                                  */
4850                                 rc = mwl8k_reload_firmware(hw,
4851                                                            di->fw_image_sta);
4852                                 if (rc)
4853                                         return rc;
4854                         }
4855                 }
4856                 macids_supported = priv->sta_macids_supported;
4857                 break;
4858         default:
4859                 return -EINVAL;
4860         }
4861
4862         macid = ffs(macids_supported & ~priv->macids_used);
4863         if (!macid--)
4864                 return -EBUSY;
4865
4866         /* Setup driver private area. */
4867         mwl8k_vif = MWL8K_VIF(vif);
4868         memset(mwl8k_vif, 0, sizeof(*mwl8k_vif));
4869         mwl8k_vif->vif = vif;
4870         mwl8k_vif->macid = macid;
4871         mwl8k_vif->seqno = 0;
4872         memcpy(mwl8k_vif->bssid, vif->addr, ETH_ALEN);
4873         mwl8k_vif->is_hw_crypto_enabled = false;
4874
4875         /* Set the mac address.  */
4876         mwl8k_cmd_set_mac_addr(hw, vif, vif->addr);
4877
4878         if (vif->type == NL80211_IFTYPE_AP)
4879                 mwl8k_cmd_set_new_stn_add_self(hw, vif);
4880
4881         priv->macids_used |= 1 << mwl8k_vif->macid;
4882         list_add_tail(&mwl8k_vif->list, &priv->vif_list);
4883
4884         return 0;
4885 }
4886
4887 static void mwl8k_remove_vif(struct mwl8k_priv *priv, struct mwl8k_vif *vif)
4888 {
4889         /* Has ieee80211_restart_hw re-added the removed interfaces? */
4890         if (!priv->macids_used)
4891                 return;
4892
4893         priv->macids_used &= ~(1 << vif->macid);
4894         list_del(&vif->list);
4895 }
4896
4897 static void mwl8k_remove_interface(struct ieee80211_hw *hw,
4898                                    struct ieee80211_vif *vif)
4899 {
4900         struct mwl8k_priv *priv = hw->priv;
4901         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4902
4903         if (vif->type == NL80211_IFTYPE_AP)
4904                 mwl8k_cmd_set_new_stn_del(hw, vif, vif->addr);
4905
4906         mwl8k_cmd_del_mac_addr(hw, vif, vif->addr);
4907
4908         mwl8k_remove_vif(priv, mwl8k_vif);
4909 }
4910
4911 static void mwl8k_hw_restart_work(struct work_struct *work)
4912 {
4913         struct mwl8k_priv *priv =
4914                 container_of(work, struct mwl8k_priv, fw_reload);
4915         struct ieee80211_hw *hw = priv->hw;
4916         struct mwl8k_device_info *di;
4917         int rc;
4918
4919         /* If some command is waiting for a response, clear it */
4920         if (priv->hostcmd_wait != NULL) {
4921                 complete(priv->hostcmd_wait);
4922                 priv->hostcmd_wait = NULL;
4923         }
4924
4925         priv->hw_restart_owner = current;
4926         di = priv->device_info;
4927         mwl8k_fw_lock(hw);
4928
4929         if (priv->ap_fw)
4930                 rc = mwl8k_reload_firmware(hw, di->fw_image_ap);
4931         else
4932                 rc = mwl8k_reload_firmware(hw, di->fw_image_sta);
4933
4934         if (rc)
4935                 goto fail;
4936
4937         priv->hw_restart_owner = NULL;
4938         priv->hw_restart_in_progress = false;
4939
4940         /*
4941          * This unlock will wake up the queues and
4942          * also opens the command path for other
4943          * commands
4944          */
4945         mwl8k_fw_unlock(hw);
4946
4947         ieee80211_restart_hw(hw);
4948
4949         wiphy_err(hw->wiphy, "Firmware restarted successfully\n");
4950
4951         return;
4952 fail:
4953         mwl8k_fw_unlock(hw);
4954
4955         wiphy_err(hw->wiphy, "Firmware restart failed\n");
4956 }
4957
4958 static int mwl8k_config(struct ieee80211_hw *hw, u32 changed)
4959 {
4960         struct ieee80211_conf *conf = &hw->conf;
4961         struct mwl8k_priv *priv = hw->priv;
4962         int rc;
4963
4964         rc = mwl8k_fw_lock(hw);
4965         if (rc)
4966                 return rc;
4967
4968         if (conf->flags & IEEE80211_CONF_IDLE)
4969                 rc = mwl8k_cmd_radio_disable(hw);
4970         else
4971                 rc = mwl8k_cmd_radio_enable(hw);
4972         if (rc)
4973                 goto out;
4974
4975         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
4976                 rc = mwl8k_cmd_set_rf_channel(hw, conf);
4977                 if (rc)
4978                         goto out;
4979         }
4980
4981         if (conf->power_level > 18)
4982                 conf->power_level = 18;
4983
4984         if (priv->ap_fw) {
4985
4986                 if (conf->flags & IEEE80211_CONF_CHANGE_POWER) {
4987                         rc = mwl8k_cmd_tx_power(hw, conf, conf->power_level);
4988                         if (rc)
4989                                 goto out;
4990                 }
4991
4992
4993         } else {
4994                 rc = mwl8k_cmd_rf_tx_power(hw, conf->power_level);
4995                 if (rc)
4996                         goto out;
4997                 rc = mwl8k_cmd_mimo_config(hw, 0x7, 0x7);
4998         }
4999
5000 out:
5001         mwl8k_fw_unlock(hw);
5002
5003         return rc;
5004 }
5005
5006 static void
5007 mwl8k_bss_info_changed_sta(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5008                            struct ieee80211_bss_conf *info, u32 changed)
5009 {
5010         struct mwl8k_priv *priv = hw->priv;
5011         u32 ap_legacy_rates = 0;
5012         u8 ap_mcs_rates[16];
5013         int rc;
5014
5015         if (mwl8k_fw_lock(hw))
5016                 return;
5017
5018         /*
5019          * No need to capture a beacon if we're no longer associated.
5020          */
5021         if ((changed & BSS_CHANGED_ASSOC) && !vif->cfg.assoc)
5022                 priv->capture_beacon = false;
5023
5024         /*
5025          * Get the AP's legacy and MCS rates.
5026          */
5027         if (vif->cfg.assoc) {
5028                 struct ieee80211_sta *ap;
5029
5030                 rcu_read_lock();
5031
5032                 ap = ieee80211_find_sta(vif, vif->bss_conf.bssid);
5033                 if (ap == NULL) {
5034                         rcu_read_unlock();
5035                         goto out;
5036                 }
5037
5038                 if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ) {
5039                         ap_legacy_rates = ap->deflink.supp_rates[NL80211_BAND_2GHZ];
5040                 } else {
5041                         ap_legacy_rates =
5042                                 ap->deflink.supp_rates[NL80211_BAND_5GHZ] << 5;
5043                 }
5044                 memcpy(ap_mcs_rates, &ap->deflink.ht_cap.mcs, 16);
5045
5046                 rcu_read_unlock();
5047
5048                 if (changed & BSS_CHANGED_ASSOC) {
5049                         if (!priv->ap_fw) {
5050                                 rc = mwl8k_cmd_set_rate(hw, vif,
5051                                                         ap_legacy_rates,
5052                                                         ap_mcs_rates);
5053                                 if (rc)
5054                                         goto out;
5055
5056                                 rc = mwl8k_cmd_use_fixed_rate_sta(hw);
5057                                 if (rc)
5058                                         goto out;
5059                         } else {
5060                                 int idx;
5061                                 int rate;
5062
5063                                 /* Use AP firmware specific rate command.
5064                                  */
5065                                 idx = ffs(vif->bss_conf.basic_rates);
5066                                 if (idx)
5067                                         idx--;
5068
5069                                 if (hw->conf.chandef.chan->band ==
5070                                     NL80211_BAND_2GHZ)
5071                                         rate = mwl8k_rates_24[idx].hw_value;
5072                                 else
5073                                         rate = mwl8k_rates_50[idx].hw_value;
5074
5075                                 mwl8k_cmd_use_fixed_rate_ap(hw, rate, rate);
5076                         }
5077                 }
5078         }
5079
5080         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
5081                 rc = mwl8k_set_radio_preamble(hw,
5082                                 vif->bss_conf.use_short_preamble);
5083                 if (rc)
5084                         goto out;
5085         }
5086
5087         if ((changed & BSS_CHANGED_ERP_SLOT) && !priv->ap_fw)  {
5088                 rc = mwl8k_cmd_set_slot(hw, vif->bss_conf.use_short_slot);
5089                 if (rc)
5090                         goto out;
5091         }
5092
5093         if (vif->cfg.assoc && !priv->ap_fw &&
5094             (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_ERP_CTS_PROT |
5095                         BSS_CHANGED_HT))) {
5096                 rc = mwl8k_cmd_set_aid(hw, vif, ap_legacy_rates);
5097                 if (rc)
5098                         goto out;
5099         }
5100
5101         if (vif->cfg.assoc &&
5102             (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_BEACON_INT))) {
5103                 /*
5104                  * Finalize the join.  Tell rx handler to process
5105                  * next beacon from our BSSID.
5106                  */
5107                 memcpy(priv->capture_bssid, vif->bss_conf.bssid, ETH_ALEN);
5108                 priv->capture_beacon = true;
5109         }
5110
5111 out:
5112         mwl8k_fw_unlock(hw);
5113 }
5114
5115 static void
5116 mwl8k_bss_info_changed_ap(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5117                           struct ieee80211_bss_conf *info, u32 changed)
5118 {
5119         int rc;
5120
5121         if (mwl8k_fw_lock(hw))
5122                 return;
5123
5124         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
5125                 rc = mwl8k_set_radio_preamble(hw,
5126                                 vif->bss_conf.use_short_preamble);
5127                 if (rc)
5128                         goto out;
5129         }
5130
5131         if (changed & BSS_CHANGED_BASIC_RATES) {
5132                 int idx;
5133                 int rate;
5134
5135                 /*
5136                  * Use lowest supported basic rate for multicasts
5137                  * and management frames (such as probe responses --
5138                  * beacons will always go out at 1 Mb/s).
5139                  */
5140                 idx = ffs(vif->bss_conf.basic_rates);
5141                 if (idx)
5142                         idx--;
5143
5144                 if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ)
5145                         rate = mwl8k_rates_24[idx].hw_value;
5146                 else
5147                         rate = mwl8k_rates_50[idx].hw_value;
5148
5149                 mwl8k_cmd_use_fixed_rate_ap(hw, rate, rate);
5150         }
5151
5152         if (changed & (BSS_CHANGED_BEACON_INT | BSS_CHANGED_BEACON)) {
5153                 struct sk_buff *skb;
5154
5155                 skb = ieee80211_beacon_get(hw, vif, 0);
5156                 if (skb != NULL) {
5157                         mwl8k_cmd_set_beacon(hw, vif, skb->data, skb->len);
5158                         kfree_skb(skb);
5159                 }
5160         }
5161
5162         if (changed & BSS_CHANGED_BEACON_ENABLED)
5163                 mwl8k_cmd_bss_start(hw, vif, info->enable_beacon);
5164
5165 out:
5166         mwl8k_fw_unlock(hw);
5167 }
5168
5169 static void
5170 mwl8k_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5171                        struct ieee80211_bss_conf *info, u64 changed)
5172 {
5173         if (vif->type == NL80211_IFTYPE_STATION)
5174                 mwl8k_bss_info_changed_sta(hw, vif, info, changed);
5175         if (vif->type == NL80211_IFTYPE_AP)
5176                 mwl8k_bss_info_changed_ap(hw, vif, info, changed);
5177 }
5178
5179 static u64 mwl8k_prepare_multicast(struct ieee80211_hw *hw,
5180                                    struct netdev_hw_addr_list *mc_list)
5181 {
5182         struct mwl8k_cmd_pkt_hdr *cmd;
5183
5184         /*
5185          * Synthesize and return a command packet that programs the
5186          * hardware multicast address filter.  At this point we don't
5187          * know whether FIF_ALLMULTI is being requested, but if it is,
5188          * we'll end up throwing this packet away and creating a new
5189          * one in mwl8k_configure_filter().
5190          */
5191         cmd = __mwl8k_cmd_mac_multicast_adr(hw, 0, mc_list);
5192
5193         return (unsigned long)cmd;
5194 }
5195
5196 static int
5197 mwl8k_configure_filter_sniffer(struct ieee80211_hw *hw,
5198                                unsigned int changed_flags,
5199                                unsigned int *total_flags)
5200 {
5201         struct mwl8k_priv *priv = hw->priv;
5202
5203         /*
5204          * Hardware sniffer mode is mutually exclusive with STA
5205          * operation, so refuse to enable sniffer mode if a STA
5206          * interface is active.
5207          */
5208         if (!list_empty(&priv->vif_list)) {
5209                 if (net_ratelimit())
5210                         wiphy_info(hw->wiphy,
5211                                    "not enabling sniffer mode because STA interface is active\n");
5212                 return 0;
5213         }
5214
5215         if (!priv->sniffer_enabled) {
5216                 if (mwl8k_cmd_enable_sniffer(hw, 1))
5217                         return 0;
5218                 priv->sniffer_enabled = true;
5219         }
5220
5221         *total_flags &= FIF_ALLMULTI |
5222                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL |
5223                         FIF_OTHER_BSS;
5224
5225         return 1;
5226 }
5227
5228 static struct mwl8k_vif *mwl8k_first_vif(struct mwl8k_priv *priv)
5229 {
5230         if (!list_empty(&priv->vif_list))
5231                 return list_entry(priv->vif_list.next, struct mwl8k_vif, list);
5232
5233         return NULL;
5234 }
5235
5236 static void mwl8k_configure_filter(struct ieee80211_hw *hw,
5237                                    unsigned int changed_flags,
5238                                    unsigned int *total_flags,
5239                                    u64 multicast)
5240 {
5241         struct mwl8k_priv *priv = hw->priv;
5242         struct mwl8k_cmd_pkt_hdr *cmd = (void *)(unsigned long)multicast;
5243
5244         /*
5245          * AP firmware doesn't allow fine-grained control over
5246          * the receive filter.
5247          */
5248         if (priv->ap_fw) {
5249                 *total_flags &= FIF_ALLMULTI | FIF_BCN_PRBRESP_PROMISC;
5250                 kfree(cmd);
5251                 return;
5252         }
5253
5254         /*
5255          * Enable hardware sniffer mode if FIF_CONTROL or
5256          * FIF_OTHER_BSS is requested.
5257          */
5258         if (*total_flags & (FIF_CONTROL | FIF_OTHER_BSS) &&
5259             mwl8k_configure_filter_sniffer(hw, changed_flags, total_flags)) {
5260                 kfree(cmd);
5261                 return;
5262         }
5263
5264         /* Clear unsupported feature flags */
5265         *total_flags &= FIF_ALLMULTI | FIF_BCN_PRBRESP_PROMISC;
5266
5267         if (mwl8k_fw_lock(hw)) {
5268                 kfree(cmd);
5269                 return;
5270         }
5271
5272         if (priv->sniffer_enabled) {
5273                 mwl8k_cmd_enable_sniffer(hw, 0);
5274                 priv->sniffer_enabled = false;
5275         }
5276
5277         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
5278                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC) {
5279                         /*
5280                          * Disable the BSS filter.
5281                          */
5282                         mwl8k_cmd_set_pre_scan(hw);
5283                 } else {
5284                         struct mwl8k_vif *mwl8k_vif;
5285                         const u8 *bssid;
5286
5287                         /*
5288                          * Enable the BSS filter.
5289                          *
5290                          * If there is an active STA interface, use that
5291                          * interface's BSSID, otherwise use a dummy one
5292                          * (where the OUI part needs to be nonzero for
5293                          * the BSSID to be accepted by POST_SCAN).
5294                          */
5295                         mwl8k_vif = mwl8k_first_vif(priv);
5296                         if (mwl8k_vif != NULL)
5297                                 bssid = mwl8k_vif->vif->bss_conf.bssid;
5298                         else
5299                                 bssid = "\x01\x00\x00\x00\x00\x00";
5300
5301                         mwl8k_cmd_set_post_scan(hw, bssid);
5302                 }
5303         }
5304
5305         /*
5306          * If FIF_ALLMULTI is being requested, throw away the command
5307          * packet that ->prepare_multicast() built and replace it with
5308          * a command packet that enables reception of all multicast
5309          * packets.
5310          */
5311         if (*total_flags & FIF_ALLMULTI) {
5312                 kfree(cmd);
5313                 cmd = __mwl8k_cmd_mac_multicast_adr(hw, 1, NULL);
5314         }
5315
5316         if (cmd != NULL) {
5317                 mwl8k_post_cmd(hw, cmd);
5318                 kfree(cmd);
5319         }
5320
5321         mwl8k_fw_unlock(hw);
5322 }
5323
5324 static int mwl8k_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
5325 {
5326         return mwl8k_cmd_set_rts_threshold(hw, value);
5327 }
5328
5329 static int mwl8k_sta_remove(struct ieee80211_hw *hw,
5330                             struct ieee80211_vif *vif,
5331                             struct ieee80211_sta *sta)
5332 {
5333         struct mwl8k_priv *priv = hw->priv;
5334
5335         if (priv->ap_fw)
5336                 return mwl8k_cmd_set_new_stn_del(hw, vif, sta->addr);
5337         else
5338                 return mwl8k_cmd_update_stadb_del(hw, vif, sta->addr);
5339 }
5340
5341 static int mwl8k_sta_add(struct ieee80211_hw *hw,
5342                          struct ieee80211_vif *vif,
5343                          struct ieee80211_sta *sta)
5344 {
5345         struct mwl8k_priv *priv = hw->priv;
5346         int ret;
5347         int i;
5348         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
5349         struct ieee80211_key_conf *key;
5350
5351         if (!priv->ap_fw) {
5352                 ret = mwl8k_cmd_update_stadb_add(hw, vif, sta);
5353                 if (ret >= 0) {
5354                         MWL8K_STA(sta)->peer_id = ret;
5355                         if (sta->deflink.ht_cap.ht_supported)
5356                                 MWL8K_STA(sta)->is_ampdu_allowed = true;
5357                         ret = 0;
5358                 }
5359
5360         } else {
5361                 ret = mwl8k_cmd_set_new_stn_add(hw, vif, sta);
5362         }
5363
5364         for (i = 0; i < NUM_WEP_KEYS; i++) {
5365                 key = IEEE80211_KEY_CONF(mwl8k_vif->wep_key_conf[i].key);
5366                 if (mwl8k_vif->wep_key_conf[i].enabled)
5367                         mwl8k_set_key(hw, SET_KEY, vif, sta, key);
5368         }
5369         return ret;
5370 }
5371
5372 static int mwl8k_conf_tx(struct ieee80211_hw *hw,
5373                          struct ieee80211_vif *vif,
5374                          unsigned int link_id, u16 queue,
5375                          const struct ieee80211_tx_queue_params *params)
5376 {
5377         struct mwl8k_priv *priv = hw->priv;
5378         int rc;
5379
5380         rc = mwl8k_fw_lock(hw);
5381         if (!rc) {
5382                 BUG_ON(queue > MWL8K_TX_WMM_QUEUES - 1);
5383                 memcpy(&priv->wmm_params[queue], params, sizeof(*params));
5384
5385                 if (!priv->wmm_enabled)
5386                         rc = mwl8k_cmd_set_wmm_mode(hw, 1);
5387
5388                 if (!rc) {
5389                         int q = MWL8K_TX_WMM_QUEUES - 1 - queue;
5390                         rc = mwl8k_cmd_set_edca_params(hw, q,
5391                                                        params->cw_min,
5392                                                        params->cw_max,
5393                                                        params->aifs,
5394                                                        params->txop);
5395                 }
5396
5397                 mwl8k_fw_unlock(hw);
5398         }
5399
5400         return rc;
5401 }
5402
5403 static int mwl8k_get_stats(struct ieee80211_hw *hw,
5404                            struct ieee80211_low_level_stats *stats)
5405 {
5406         return mwl8k_cmd_get_stat(hw, stats);
5407 }
5408
5409 static int mwl8k_get_survey(struct ieee80211_hw *hw, int idx,
5410                                 struct survey_info *survey)
5411 {
5412         struct mwl8k_priv *priv = hw->priv;
5413         struct ieee80211_conf *conf = &hw->conf;
5414         struct ieee80211_supported_band *sband;
5415
5416         if (priv->ap_fw) {
5417                 sband = hw->wiphy->bands[NL80211_BAND_2GHZ];
5418
5419                 if (sband && idx >= sband->n_channels) {
5420                         idx -= sband->n_channels;
5421                         sband = NULL;
5422                 }
5423
5424                 if (!sband)
5425                         sband = hw->wiphy->bands[NL80211_BAND_5GHZ];
5426
5427                 if (!sband || idx >= sband->n_channels)
5428                         return -ENOENT;
5429
5430                 memcpy(survey, &priv->survey[idx], sizeof(*survey));
5431                 survey->channel = &sband->channels[idx];
5432
5433                 return 0;
5434         }
5435
5436         if (idx != 0)
5437                 return -ENOENT;
5438
5439         survey->channel = conf->chandef.chan;
5440         survey->filled = SURVEY_INFO_NOISE_DBM;
5441         survey->noise = priv->noise;
5442
5443         return 0;
5444 }
5445
5446 #define MAX_AMPDU_ATTEMPTS 5
5447
5448 static int
5449 mwl8k_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5450                    struct ieee80211_ampdu_params *params)
5451 {
5452         struct ieee80211_sta *sta = params->sta;
5453         enum ieee80211_ampdu_mlme_action action = params->action;
5454         u16 tid = params->tid;
5455         u16 *ssn = &params->ssn;
5456         u8 buf_size = params->buf_size;
5457         int i, rc = 0;
5458         struct mwl8k_priv *priv = hw->priv;
5459         struct mwl8k_ampdu_stream *stream;
5460         u8 *addr = sta->addr, idx;
5461         struct mwl8k_sta *sta_info = MWL8K_STA(sta);
5462
5463         if (!ieee80211_hw_check(hw, AMPDU_AGGREGATION))
5464                 return -ENOTSUPP;
5465
5466         spin_lock(&priv->stream_lock);
5467         stream = mwl8k_lookup_stream(hw, addr, tid);
5468
5469         switch (action) {
5470         case IEEE80211_AMPDU_RX_START:
5471         case IEEE80211_AMPDU_RX_STOP:
5472                 break;
5473         case IEEE80211_AMPDU_TX_START:
5474                 /* By the time we get here the hw queues may contain outgoing
5475                  * packets for this RA/TID that are not part of this BA
5476                  * session.  The hw will assign sequence numbers to these
5477                  * packets as they go out.  So if we query the hw for its next
5478                  * sequence number and use that for the SSN here, it may end up
5479                  * being wrong, which will lead to sequence number mismatch at
5480                  * the recipient.  To avoid this, we reset the sequence number
5481                  * to O for the first MPDU in this BA stream.
5482                  */
5483                 *ssn = 0;
5484                 if (stream == NULL) {
5485                         /* This means that somebody outside this driver called
5486                          * ieee80211_start_tx_ba_session.  This is unexpected
5487                          * because we do our own rate control.  Just warn and
5488                          * move on.
5489                          */
5490                         wiphy_warn(hw->wiphy, "Unexpected call to %s.  "
5491                                    "Proceeding anyway.\n", __func__);
5492                         stream = mwl8k_add_stream(hw, sta, tid);
5493                 }
5494                 if (stream == NULL) {
5495                         wiphy_debug(hw->wiphy, "no free AMPDU streams\n");
5496                         rc = -EBUSY;
5497                         break;
5498                 }
5499                 stream->state = AMPDU_STREAM_IN_PROGRESS;
5500
5501                 /* Release the lock before we do the time consuming stuff */
5502                 spin_unlock(&priv->stream_lock);
5503                 for (i = 0; i < MAX_AMPDU_ATTEMPTS; i++) {
5504
5505                         /* Check if link is still valid */
5506                         if (!sta_info->is_ampdu_allowed) {
5507                                 spin_lock(&priv->stream_lock);
5508                                 mwl8k_remove_stream(hw, stream);
5509                                 spin_unlock(&priv->stream_lock);
5510                                 return -EBUSY;
5511                         }
5512
5513                         rc = mwl8k_check_ba(hw, stream, vif);
5514
5515                         /* If HW restart is in progress mwl8k_post_cmd will
5516                          * return -EBUSY. Avoid retrying mwl8k_check_ba in
5517                          * such cases
5518                          */
5519                         if (!rc || rc == -EBUSY)
5520                                 break;
5521                         /*
5522                          * HW queues take time to be flushed, give them
5523                          * sufficient time
5524                          */
5525
5526                         msleep(1000);
5527                 }
5528                 spin_lock(&priv->stream_lock);
5529                 if (rc) {
5530                         wiphy_err(hw->wiphy, "Stream for tid %d busy after %d"
5531                                 " attempts\n", tid, MAX_AMPDU_ATTEMPTS);
5532                         mwl8k_remove_stream(hw, stream);
5533                         rc = -EBUSY;
5534                         break;
5535                 }
5536                 rc = IEEE80211_AMPDU_TX_START_IMMEDIATE;
5537                 break;
5538         case IEEE80211_AMPDU_TX_STOP_CONT:
5539         case IEEE80211_AMPDU_TX_STOP_FLUSH:
5540         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
5541                 if (stream) {
5542                         if (stream->state == AMPDU_STREAM_ACTIVE) {
5543                                 idx = stream->idx;
5544                                 spin_unlock(&priv->stream_lock);
5545                                 mwl8k_destroy_ba(hw, idx);
5546                                 spin_lock(&priv->stream_lock);
5547                         }
5548                         mwl8k_remove_stream(hw, stream);
5549                 }
5550                 ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
5551                 break;
5552         case IEEE80211_AMPDU_TX_OPERATIONAL:
5553                 BUG_ON(stream == NULL);
5554                 BUG_ON(stream->state != AMPDU_STREAM_IN_PROGRESS);
5555                 spin_unlock(&priv->stream_lock);
5556                 rc = mwl8k_create_ba(hw, stream, buf_size, vif);
5557                 spin_lock(&priv->stream_lock);
5558                 if (!rc)
5559                         stream->state = AMPDU_STREAM_ACTIVE;
5560                 else {
5561                         idx = stream->idx;
5562                         spin_unlock(&priv->stream_lock);
5563                         mwl8k_destroy_ba(hw, idx);
5564                         spin_lock(&priv->stream_lock);
5565                         wiphy_debug(hw->wiphy,
5566                                 "Failed adding stream for sta %pM tid %d\n",
5567                                 addr, tid);
5568                         mwl8k_remove_stream(hw, stream);
5569                 }
5570                 break;
5571
5572         default:
5573                 rc = -ENOTSUPP;
5574         }
5575
5576         spin_unlock(&priv->stream_lock);
5577         return rc;
5578 }
5579
5580 static void mwl8k_sw_scan_start(struct ieee80211_hw *hw,
5581                                 struct ieee80211_vif *vif,
5582                                 const u8 *mac_addr)
5583 {
5584         struct mwl8k_priv *priv = hw->priv;
5585         u8 tmp;
5586
5587         if (!priv->ap_fw)
5588                 return;
5589
5590         /* clear all stats */
5591         priv->channel_time = 0;
5592         ioread32(priv->regs + BBU_RXRDY_CNT_REG);
5593         ioread32(priv->regs + NOK_CCA_CNT_REG);
5594         mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &tmp);
5595
5596         priv->sw_scan_start = true;
5597 }
5598
5599 static void mwl8k_sw_scan_complete(struct ieee80211_hw *hw,
5600                                    struct ieee80211_vif *vif)
5601 {
5602         struct mwl8k_priv *priv = hw->priv;
5603         u8 tmp;
5604
5605         if (!priv->ap_fw)
5606                 return;
5607
5608         priv->sw_scan_start = false;
5609
5610         /* clear all stats */
5611         priv->channel_time = 0;
5612         ioread32(priv->regs + BBU_RXRDY_CNT_REG);
5613         ioread32(priv->regs + NOK_CCA_CNT_REG);
5614         mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &tmp);
5615 }
5616
5617 static const struct ieee80211_ops mwl8k_ops = {
5618         .add_chanctx = ieee80211_emulate_add_chanctx,
5619         .remove_chanctx = ieee80211_emulate_remove_chanctx,
5620         .change_chanctx = ieee80211_emulate_change_chanctx,
5621         .switch_vif_chanctx = ieee80211_emulate_switch_vif_chanctx,
5622         .tx                     = mwl8k_tx,
5623         .wake_tx_queue          = ieee80211_handle_wake_tx_queue,
5624         .start                  = mwl8k_start,
5625         .stop                   = mwl8k_stop,
5626         .add_interface          = mwl8k_add_interface,
5627         .remove_interface       = mwl8k_remove_interface,
5628         .config                 = mwl8k_config,
5629         .bss_info_changed       = mwl8k_bss_info_changed,
5630         .prepare_multicast      = mwl8k_prepare_multicast,
5631         .configure_filter       = mwl8k_configure_filter,
5632         .set_key                = mwl8k_set_key,
5633         .set_rts_threshold      = mwl8k_set_rts_threshold,
5634         .sta_add                = mwl8k_sta_add,
5635         .sta_remove             = mwl8k_sta_remove,
5636         .conf_tx                = mwl8k_conf_tx,
5637         .get_stats              = mwl8k_get_stats,
5638         .get_survey             = mwl8k_get_survey,
5639         .ampdu_action           = mwl8k_ampdu_action,
5640         .sw_scan_start          = mwl8k_sw_scan_start,
5641         .sw_scan_complete       = mwl8k_sw_scan_complete,
5642 };
5643
5644 static void mwl8k_finalize_join_worker(struct work_struct *work)
5645 {
5646         struct mwl8k_priv *priv =
5647                 container_of(work, struct mwl8k_priv, finalize_join_worker);
5648         struct sk_buff *skb = priv->beacon_skb;
5649         struct ieee80211_mgmt *mgmt = (void *)skb->data;
5650         int len = skb->len - offsetof(struct ieee80211_mgmt, u.beacon.variable);
5651         const u8 *tim = cfg80211_find_ie(WLAN_EID_TIM,
5652                                          mgmt->u.beacon.variable, len);
5653         int dtim_period = 1;
5654
5655         if (tim && tim[1] >= 2)
5656                 dtim_period = tim[3];
5657
5658         mwl8k_cmd_finalize_join(priv->hw, skb->data, skb->len, dtim_period);
5659
5660         dev_kfree_skb(skb);
5661         priv->beacon_skb = NULL;
5662 }
5663
5664 enum {
5665         MWL8363 = 0,
5666         MWL8687,
5667         MWL8366,
5668         MWL8764,
5669 };
5670
5671 #define MWL8K_8366_AP_FW_API 3
5672 #define _MWL8K_8366_AP_FW(api) "mwl8k/fmimage_8366_ap-" #api ".fw"
5673 #define MWL8K_8366_AP_FW(api) _MWL8K_8366_AP_FW(api)
5674
5675 #define MWL8K_8764_AP_FW_API 1
5676 #define _MWL8K_8764_AP_FW(api) "mwl8k/fmimage_8764_ap-" #api ".fw"
5677 #define MWL8K_8764_AP_FW(api) _MWL8K_8764_AP_FW(api)
5678
5679 static struct mwl8k_device_info mwl8k_info_tbl[] = {
5680         [MWL8363] = {
5681                 .part_name      = "88w8363",
5682                 .helper_image   = "mwl8k/helper_8363.fw",
5683                 .fw_image_sta   = "mwl8k/fmimage_8363.fw",
5684         },
5685         [MWL8687] = {
5686                 .part_name      = "88w8687",
5687                 .helper_image   = "mwl8k/helper_8687.fw",
5688                 .fw_image_sta   = "mwl8k/fmimage_8687.fw",
5689         },
5690         [MWL8366] = {
5691                 .part_name      = "88w8366",
5692                 .helper_image   = "mwl8k/helper_8366.fw",
5693                 .fw_image_sta   = "mwl8k/fmimage_8366.fw",
5694                 .fw_image_ap    = MWL8K_8366_AP_FW(MWL8K_8366_AP_FW_API),
5695                 .fw_api_ap      = MWL8K_8366_AP_FW_API,
5696                 .ap_rxd_ops     = &rxd_ap_ops,
5697         },
5698         [MWL8764] = {
5699                 .part_name      = "88w8764",
5700                 .fw_image_ap    = MWL8K_8764_AP_FW(MWL8K_8764_AP_FW_API),
5701                 .fw_api_ap      = MWL8K_8764_AP_FW_API,
5702                 .ap_rxd_ops     = &rxd_ap_ops,
5703         },
5704 };
5705
5706 MODULE_FIRMWARE("mwl8k/helper_8363.fw");
5707 MODULE_FIRMWARE("mwl8k/fmimage_8363.fw");
5708 MODULE_FIRMWARE("mwl8k/helper_8687.fw");
5709 MODULE_FIRMWARE("mwl8k/fmimage_8687.fw");
5710 MODULE_FIRMWARE("mwl8k/helper_8366.fw");
5711 MODULE_FIRMWARE("mwl8k/fmimage_8366.fw");
5712 MODULE_FIRMWARE(MWL8K_8366_AP_FW(MWL8K_8366_AP_FW_API));
5713
5714 static const struct pci_device_id mwl8k_pci_id_table[] = {
5715         { PCI_VDEVICE(MARVELL, 0x2a0a), .driver_data = MWL8363, },
5716         { PCI_VDEVICE(MARVELL, 0x2a0c), .driver_data = MWL8363, },
5717         { PCI_VDEVICE(MARVELL, 0x2a24), .driver_data = MWL8363, },
5718         { PCI_VDEVICE(MARVELL, 0x2a2b), .driver_data = MWL8687, },
5719         { PCI_VDEVICE(MARVELL, 0x2a30), .driver_data = MWL8687, },
5720         { PCI_VDEVICE(MARVELL, 0x2a40), .driver_data = MWL8366, },
5721         { PCI_VDEVICE(MARVELL, 0x2a41), .driver_data = MWL8366, },
5722         { PCI_VDEVICE(MARVELL, 0x2a42), .driver_data = MWL8366, },
5723         { PCI_VDEVICE(MARVELL, 0x2a43), .driver_data = MWL8366, },
5724         { PCI_VDEVICE(MARVELL, 0x2b36), .driver_data = MWL8764, },
5725         { },
5726 };
5727 MODULE_DEVICE_TABLE(pci, mwl8k_pci_id_table);
5728
5729 static int mwl8k_request_alt_fw(struct mwl8k_priv *priv)
5730 {
5731         int rc;
5732         printk(KERN_ERR "%s: Error requesting preferred fw %s.\n"
5733                "Trying alternative firmware %s\n", pci_name(priv->pdev),
5734                priv->fw_pref, priv->fw_alt);
5735         rc = mwl8k_request_fw(priv, priv->fw_alt, &priv->fw_ucode, true);
5736         if (rc) {
5737                 printk(KERN_ERR "%s: Error requesting alt fw %s\n",
5738                        pci_name(priv->pdev), priv->fw_alt);
5739                 return rc;
5740         }
5741         return 0;
5742 }
5743
5744 static int mwl8k_firmware_load_success(struct mwl8k_priv *priv);
5745 static void mwl8k_fw_state_machine(const struct firmware *fw, void *context)
5746 {
5747         struct mwl8k_priv *priv = context;
5748         struct mwl8k_device_info *di = priv->device_info;
5749         int rc;
5750
5751         switch (priv->fw_state) {
5752         case FW_STATE_INIT:
5753                 if (!fw) {
5754                         printk(KERN_ERR "%s: Error requesting helper fw %s\n",
5755                                pci_name(priv->pdev), di->helper_image);
5756                         goto fail;
5757                 }
5758                 priv->fw_helper = fw;
5759                 rc = mwl8k_request_fw(priv, priv->fw_pref, &priv->fw_ucode,
5760                                       true);
5761                 if (rc && priv->fw_alt) {
5762                         rc = mwl8k_request_alt_fw(priv);
5763                         if (rc)
5764                                 goto fail;
5765                         priv->fw_state = FW_STATE_LOADING_ALT;
5766                 } else if (rc)
5767                         goto fail;
5768                 else
5769                         priv->fw_state = FW_STATE_LOADING_PREF;
5770                 break;
5771
5772         case FW_STATE_LOADING_PREF:
5773                 if (!fw) {
5774                         if (priv->fw_alt) {
5775                                 rc = mwl8k_request_alt_fw(priv);
5776                                 if (rc)
5777                                         goto fail;
5778                                 priv->fw_state = FW_STATE_LOADING_ALT;
5779                         } else
5780                                 goto fail;
5781                 } else {
5782                         priv->fw_ucode = fw;
5783                         rc = mwl8k_firmware_load_success(priv);
5784                         if (rc)
5785                                 goto fail;
5786                         else
5787                                 complete(&priv->firmware_loading_complete);
5788                 }
5789                 break;
5790
5791         case FW_STATE_LOADING_ALT:
5792                 if (!fw) {
5793                         printk(KERN_ERR "%s: Error requesting alt fw %s\n",
5794                                pci_name(priv->pdev), di->helper_image);
5795                         goto fail;
5796                 }
5797                 priv->fw_ucode = fw;
5798                 rc = mwl8k_firmware_load_success(priv);
5799                 if (rc)
5800                         goto fail;
5801                 else
5802                         complete(&priv->firmware_loading_complete);
5803                 break;
5804
5805         default:
5806                 printk(KERN_ERR "%s: Unexpected firmware loading state: %d\n",
5807                        MWL8K_NAME, priv->fw_state);
5808                 BUG_ON(1);
5809         }
5810
5811         return;
5812
5813 fail:
5814         priv->fw_state = FW_STATE_ERROR;
5815         complete(&priv->firmware_loading_complete);
5816         mwl8k_release_firmware(priv);
5817         device_release_driver(&priv->pdev->dev);
5818 }
5819
5820 #define MAX_RESTART_ATTEMPTS 1
5821 static int mwl8k_init_firmware(struct ieee80211_hw *hw, char *fw_image,
5822                                bool nowait)
5823 {
5824         struct mwl8k_priv *priv = hw->priv;
5825         int rc;
5826         int count = MAX_RESTART_ATTEMPTS;
5827
5828 retry:
5829         /* Reset firmware and hardware */
5830         mwl8k_hw_reset(priv);
5831
5832         /* Ask userland hotplug daemon for the device firmware */
5833         rc = mwl8k_request_firmware(priv, fw_image, nowait);
5834         if (rc) {
5835                 wiphy_err(hw->wiphy, "Firmware files not found\n");
5836                 return rc;
5837         }
5838
5839         if (nowait)
5840                 return rc;
5841
5842         /* Load firmware into hardware */
5843         rc = mwl8k_load_firmware(hw);
5844         if (rc)
5845                 wiphy_err(hw->wiphy, "Cannot start firmware\n");
5846
5847         /* Reclaim memory once firmware is successfully loaded */
5848         mwl8k_release_firmware(priv);
5849
5850         if (rc && count) {
5851                 /* FW did not start successfully;
5852                  * lets try one more time
5853                  */
5854                 count--;
5855                 wiphy_err(hw->wiphy, "Trying to reload the firmware again\n");
5856                 msleep(20);
5857                 goto retry;
5858         }
5859
5860         return rc;
5861 }
5862
5863 static int mwl8k_init_txqs(struct ieee80211_hw *hw)
5864 {
5865         struct mwl8k_priv *priv = hw->priv;
5866         int rc = 0;
5867         int i;
5868
5869         for (i = 0; i < mwl8k_tx_queues(priv); i++) {
5870                 rc = mwl8k_txq_init(hw, i);
5871                 if (rc)
5872                         break;
5873                 if (priv->ap_fw)
5874                         iowrite32(priv->txq[i].txd_dma,
5875                                   priv->sram + priv->txq_offset[i]);
5876         }
5877         return rc;
5878 }
5879
5880 /* initialize hw after successfully loading a firmware image */
5881 static int mwl8k_probe_hw(struct ieee80211_hw *hw)
5882 {
5883         struct mwl8k_priv *priv = hw->priv;
5884         int rc = 0;
5885         int i;
5886
5887         if (priv->ap_fw) {
5888                 priv->rxd_ops = priv->device_info->ap_rxd_ops;
5889                 if (priv->rxd_ops == NULL) {
5890                         wiphy_err(hw->wiphy,
5891                                   "Driver does not have AP firmware image support for this hardware\n");
5892                         rc = -ENOENT;
5893                         goto err_stop_firmware;
5894                 }
5895         } else {
5896                 priv->rxd_ops = &rxd_sta_ops;
5897         }
5898
5899         priv->sniffer_enabled = false;
5900         priv->wmm_enabled = false;
5901         priv->pending_tx_pkts = 0;
5902         atomic_set(&priv->watchdog_event_pending, 0);
5903
5904         rc = mwl8k_rxq_init(hw, 0);
5905         if (rc)
5906                 goto err_stop_firmware;
5907         rxq_refill(hw, 0, INT_MAX);
5908
5909         /* For the sta firmware, we need to know the dma addresses of tx queues
5910          * before sending MWL8K_CMD_GET_HW_SPEC.  So we must initialize them
5911          * prior to issuing this command.  But for the AP case, we learn the
5912          * total number of queues from the result CMD_GET_HW_SPEC, so for this
5913          * case we must initialize the tx queues after.
5914          */
5915         priv->num_ampdu_queues = 0;
5916         if (!priv->ap_fw) {
5917                 rc = mwl8k_init_txqs(hw);
5918                 if (rc)
5919                         goto err_free_queues;
5920         }
5921
5922         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
5923         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5924         iowrite32(MWL8K_A2H_INT_TX_DONE|MWL8K_A2H_INT_RX_READY|
5925                   MWL8K_A2H_INT_BA_WATCHDOG,
5926                   priv->regs + MWL8K_HIU_A2H_INTERRUPT_CLEAR_SEL);
5927         iowrite32(MWL8K_A2H_INT_OPC_DONE,
5928                   priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
5929
5930         rc = request_irq(priv->pdev->irq, mwl8k_interrupt,
5931                          IRQF_SHARED, MWL8K_NAME, hw);
5932         if (rc) {
5933                 wiphy_err(hw->wiphy, "failed to register IRQ handler\n");
5934                 goto err_free_queues;
5935         }
5936
5937         /*
5938          * When hw restart is requested,
5939          * mac80211 will take care of clearing
5940          * the ampdu streams, so do not clear
5941          * the ampdu state here
5942          */
5943         if (!priv->hw_restart_in_progress)
5944                 memset(priv->ampdu, 0, sizeof(priv->ampdu));
5945
5946         /*
5947          * Temporarily enable interrupts.  Initial firmware host
5948          * commands use interrupts and avoid polling.  Disable
5949          * interrupts when done.
5950          */
5951         iowrite32(MWL8K_A2H_EVENTS, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5952
5953         /* Get config data, mac addrs etc */
5954         if (priv->ap_fw) {
5955                 rc = mwl8k_cmd_get_hw_spec_ap(hw);
5956                 if (!rc)
5957                         rc = mwl8k_init_txqs(hw);
5958                 if (!rc)
5959                         rc = mwl8k_cmd_set_hw_spec(hw);
5960         } else {
5961                 rc = mwl8k_cmd_get_hw_spec_sta(hw);
5962         }
5963         if (rc) {
5964                 wiphy_err(hw->wiphy, "Cannot initialise firmware\n");
5965                 goto err_free_irq;
5966         }
5967
5968         /* Turn radio off */
5969         rc = mwl8k_cmd_radio_disable(hw);
5970         if (rc) {
5971                 wiphy_err(hw->wiphy, "Cannot disable\n");
5972                 goto err_free_irq;
5973         }
5974
5975         /* Clear MAC address */
5976         rc = mwl8k_cmd_set_mac_addr(hw, NULL, "\x00\x00\x00\x00\x00\x00");
5977         if (rc) {
5978                 wiphy_err(hw->wiphy, "Cannot clear MAC address\n");
5979                 goto err_free_irq;
5980         }
5981
5982         /* Configure Antennas */
5983         rc = mwl8k_cmd_rf_antenna(hw, MWL8K_RF_ANTENNA_RX, 0x3);
5984         if (rc)
5985                 wiphy_warn(hw->wiphy, "failed to set # of RX antennas");
5986         rc = mwl8k_cmd_rf_antenna(hw, MWL8K_RF_ANTENNA_TX, 0x7);
5987         if (rc)
5988                 wiphy_warn(hw->wiphy, "failed to set # of TX antennas");
5989
5990
5991         /* Disable interrupts */
5992         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5993         free_irq(priv->pdev->irq, hw);
5994
5995         wiphy_info(hw->wiphy, "%s v%d, %pm, %s firmware %u.%u.%u.%u\n",
5996                    priv->device_info->part_name,
5997                    priv->hw_rev, hw->wiphy->perm_addr,
5998                    priv->ap_fw ? "AP" : "STA",
5999                    (priv->fw_rev >> 24) & 0xff, (priv->fw_rev >> 16) & 0xff,
6000                    (priv->fw_rev >> 8) & 0xff, priv->fw_rev & 0xff);
6001
6002         return 0;
6003
6004 err_free_irq:
6005         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
6006         free_irq(priv->pdev->irq, hw);
6007
6008 err_free_queues:
6009         for (i = 0; i < mwl8k_tx_queues(priv); i++)
6010                 mwl8k_txq_deinit(hw, i);
6011         mwl8k_rxq_deinit(hw, 0);
6012
6013 err_stop_firmware:
6014         mwl8k_hw_reset(priv);
6015
6016         return rc;
6017 }
6018
6019 /*
6020  * invoke mwl8k_reload_firmware to change the firmware image after the device
6021  * has already been registered
6022  */
6023 static int mwl8k_reload_firmware(struct ieee80211_hw *hw, char *fw_image)
6024 {
6025         int i, rc = 0;
6026         struct mwl8k_priv *priv = hw->priv;
6027         struct mwl8k_vif *vif, *tmp_vif;
6028
6029         mwl8k_stop(hw, false);
6030         mwl8k_rxq_deinit(hw, 0);
6031
6032         /*
6033          * All the existing interfaces are re-added by the ieee80211_reconfig;
6034          * which means driver should remove existing interfaces before calling
6035          * ieee80211_restart_hw
6036          */
6037         if (priv->hw_restart_in_progress)
6038                 list_for_each_entry_safe(vif, tmp_vif, &priv->vif_list, list)
6039                         mwl8k_remove_vif(priv, vif);
6040
6041         for (i = 0; i < mwl8k_tx_queues(priv); i++)
6042                 mwl8k_txq_deinit(hw, i);
6043
6044         rc = mwl8k_init_firmware(hw, fw_image, false);
6045         if (rc)
6046                 goto fail;
6047
6048         rc = mwl8k_probe_hw(hw);
6049         if (rc)
6050                 goto fail;
6051
6052         if (priv->hw_restart_in_progress)
6053                 return rc;
6054
6055         rc = mwl8k_start(hw);
6056         if (rc)
6057                 goto fail;
6058
6059         rc = mwl8k_config(hw, ~0);
6060         if (rc)
6061                 goto fail;
6062
6063         for (i = 0; i < MWL8K_TX_WMM_QUEUES; i++) {
6064                 rc = mwl8k_conf_tx(hw, NULL, 0, i, &priv->wmm_params[i]);
6065                 if (rc)
6066                         goto fail;
6067         }
6068
6069         return rc;
6070
6071 fail:
6072         printk(KERN_WARNING "mwl8k: Failed to reload firmware image.\n");
6073         return rc;
6074 }
6075
6076 static const struct ieee80211_iface_limit ap_if_limits[] = {
6077         { .max = 8,     .types = BIT(NL80211_IFTYPE_AP) },
6078         { .max = 1,     .types = BIT(NL80211_IFTYPE_STATION) },
6079 };
6080
6081 static const struct ieee80211_iface_combination ap_if_comb = {
6082         .limits = ap_if_limits,
6083         .n_limits = ARRAY_SIZE(ap_if_limits),
6084         .max_interfaces = 8,
6085         .num_different_channels = 1,
6086 };
6087
6088
6089 static int mwl8k_firmware_load_success(struct mwl8k_priv *priv)
6090 {
6091         struct ieee80211_hw *hw = priv->hw;
6092         int i, rc;
6093
6094         rc = mwl8k_load_firmware(hw);
6095         mwl8k_release_firmware(priv);
6096         if (rc) {
6097                 wiphy_err(hw->wiphy, "Cannot start firmware\n");
6098                 return rc;
6099         }
6100
6101         /*
6102          * Extra headroom is the size of the required DMA header
6103          * minus the size of the smallest 802.11 frame (CTS frame).
6104          */
6105         hw->extra_tx_headroom =
6106                 sizeof(struct mwl8k_dma_data) - sizeof(struct ieee80211_cts);
6107
6108         hw->extra_tx_headroom -= priv->ap_fw ? REDUCED_TX_HEADROOM : 0;
6109
6110         hw->queues = MWL8K_TX_WMM_QUEUES;
6111
6112         /* Set rssi values to dBm */
6113         ieee80211_hw_set(hw, SIGNAL_DBM);
6114         ieee80211_hw_set(hw, HAS_RATE_CONTROL);
6115
6116         /*
6117          * Ask mac80211 to not to trigger PS mode
6118          * based on PM bit of incoming frames.
6119          */
6120         if (priv->ap_fw)
6121                 ieee80211_hw_set(hw, AP_LINK_PS);
6122
6123         hw->vif_data_size = sizeof(struct mwl8k_vif);
6124         hw->sta_data_size = sizeof(struct mwl8k_sta);
6125
6126         priv->macids_used = 0;
6127         INIT_LIST_HEAD(&priv->vif_list);
6128
6129         /* Set default radio state and preamble */
6130         priv->radio_on = false;
6131         priv->radio_short_preamble = false;
6132
6133         /* Finalize join worker */
6134         INIT_WORK(&priv->finalize_join_worker, mwl8k_finalize_join_worker);
6135         /* Handle watchdog ba events */
6136         INIT_WORK(&priv->watchdog_ba_handle, mwl8k_watchdog_ba_events);
6137         /* To reload the firmware if it crashes */
6138         INIT_WORK(&priv->fw_reload, mwl8k_hw_restart_work);
6139
6140         /* TX reclaim and RX tasklets.  */
6141         tasklet_setup(&priv->poll_tx_task, mwl8k_tx_poll);
6142         tasklet_disable(&priv->poll_tx_task);
6143         tasklet_setup(&priv->poll_rx_task, mwl8k_rx_poll);
6144         tasklet_disable(&priv->poll_rx_task);
6145
6146         /* Power management cookie */
6147         priv->cookie = dma_alloc_coherent(&priv->pdev->dev, 4,
6148                                           &priv->cookie_dma, GFP_KERNEL);
6149         if (priv->cookie == NULL)
6150                 return -ENOMEM;
6151
6152         mutex_init(&priv->fw_mutex);
6153         priv->fw_mutex_owner = NULL;
6154         priv->fw_mutex_depth = 0;
6155         priv->hostcmd_wait = NULL;
6156
6157         spin_lock_init(&priv->tx_lock);
6158
6159         spin_lock_init(&priv->stream_lock);
6160
6161         priv->tx_wait = NULL;
6162
6163         rc = mwl8k_probe_hw(hw);
6164         if (rc)
6165                 goto err_free_cookie;
6166
6167         hw->wiphy->interface_modes = 0;
6168
6169         if (priv->ap_macids_supported || priv->device_info->fw_image_ap) {
6170                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP);
6171                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_STATION);
6172                 hw->wiphy->iface_combinations = &ap_if_comb;
6173                 hw->wiphy->n_iface_combinations = 1;
6174         }
6175
6176         if (priv->sta_macids_supported || priv->device_info->fw_image_sta)
6177                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_STATION);
6178
6179         wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
6180
6181         rc = ieee80211_register_hw(hw);
6182         if (rc) {
6183                 wiphy_err(hw->wiphy, "Cannot register device\n");
6184                 goto err_unprobe_hw;
6185         }
6186
6187         return 0;
6188
6189 err_unprobe_hw:
6190         for (i = 0; i < mwl8k_tx_queues(priv); i++)
6191                 mwl8k_txq_deinit(hw, i);
6192         mwl8k_rxq_deinit(hw, 0);
6193
6194 err_free_cookie:
6195         if (priv->cookie != NULL)
6196                 dma_free_coherent(&priv->pdev->dev, 4, priv->cookie,
6197                                   priv->cookie_dma);
6198
6199         return rc;
6200 }
6201 static int mwl8k_probe(struct pci_dev *pdev,
6202                                  const struct pci_device_id *id)
6203 {
6204         static int printed_version;
6205         struct ieee80211_hw *hw;
6206         struct mwl8k_priv *priv;
6207         struct mwl8k_device_info *di;
6208         int rc;
6209
6210         if (!printed_version) {
6211                 printk(KERN_INFO "%s version %s\n", MWL8K_DESC, MWL8K_VERSION);
6212                 printed_version = 1;
6213         }
6214
6215
6216         rc = pci_enable_device(pdev);
6217         if (rc) {
6218                 printk(KERN_ERR "%s: Cannot enable new PCI device\n",
6219                        MWL8K_NAME);
6220                 return rc;
6221         }
6222
6223         rc = pci_request_regions(pdev, MWL8K_NAME);
6224         if (rc) {
6225                 printk(KERN_ERR "%s: Cannot obtain PCI resources\n",
6226                        MWL8K_NAME);
6227                 goto err_disable_device;
6228         }
6229
6230         pci_set_master(pdev);
6231
6232
6233         hw = ieee80211_alloc_hw(sizeof(*priv), &mwl8k_ops);
6234         if (hw == NULL) {
6235                 printk(KERN_ERR "%s: ieee80211 alloc failed\n", MWL8K_NAME);
6236                 rc = -ENOMEM;
6237                 goto err_free_reg;
6238         }
6239
6240         SET_IEEE80211_DEV(hw, &pdev->dev);
6241         pci_set_drvdata(pdev, hw);
6242
6243         priv = hw->priv;
6244         priv->hw = hw;
6245         priv->pdev = pdev;
6246         priv->device_info = &mwl8k_info_tbl[id->driver_data];
6247
6248         if (id->driver_data == MWL8764)
6249                 priv->is_8764 = true;
6250
6251         priv->sram = pci_iomap(pdev, 0, 0x10000);
6252         if (priv->sram == NULL) {
6253                 wiphy_err(hw->wiphy, "Cannot map device SRAM\n");
6254                 rc = -EIO;
6255                 goto err_iounmap;
6256         }
6257
6258         /*
6259          * If BAR0 is a 32 bit BAR, the register BAR will be BAR1.
6260          * If BAR0 is a 64 bit BAR, the register BAR will be BAR2.
6261          */
6262         priv->regs = pci_iomap(pdev, 1, 0x10000);
6263         if (priv->regs == NULL) {
6264                 priv->regs = pci_iomap(pdev, 2, 0x10000);
6265                 if (priv->regs == NULL) {
6266                         wiphy_err(hw->wiphy, "Cannot map device registers\n");
6267                         rc = -EIO;
6268                         goto err_iounmap;
6269                 }
6270         }
6271
6272         /*
6273          * Choose the initial fw image depending on user input.  If a second
6274          * image is available, make it the alternative image that will be
6275          * loaded if the first one fails.
6276          */
6277         init_completion(&priv->firmware_loading_complete);
6278         di = priv->device_info;
6279         if (ap_mode_default && di->fw_image_ap) {
6280                 priv->fw_pref = di->fw_image_ap;
6281                 priv->fw_alt = di->fw_image_sta;
6282         } else if (!ap_mode_default && di->fw_image_sta) {
6283                 priv->fw_pref = di->fw_image_sta;
6284                 priv->fw_alt = di->fw_image_ap;
6285         } else if (ap_mode_default && !di->fw_image_ap && di->fw_image_sta) {
6286                 printk(KERN_WARNING "AP fw is unavailable.  Using STA fw.");
6287                 priv->fw_pref = di->fw_image_sta;
6288         } else if (!ap_mode_default && !di->fw_image_sta && di->fw_image_ap) {
6289                 printk(KERN_WARNING "STA fw is unavailable.  Using AP fw.");
6290                 priv->fw_pref = di->fw_image_ap;
6291         }
6292         rc = mwl8k_init_firmware(hw, priv->fw_pref, true);
6293         if (rc)
6294                 goto err_stop_firmware;
6295
6296         priv->hw_restart_in_progress = false;
6297
6298         priv->running_bsses = 0;
6299
6300         return rc;
6301
6302 err_stop_firmware:
6303         mwl8k_hw_reset(priv);
6304
6305 err_iounmap:
6306         if (priv->regs != NULL)
6307                 pci_iounmap(pdev, priv->regs);
6308
6309         if (priv->sram != NULL)
6310                 pci_iounmap(pdev, priv->sram);
6311
6312         ieee80211_free_hw(hw);
6313
6314 err_free_reg:
6315         pci_release_regions(pdev);
6316
6317 err_disable_device:
6318         pci_disable_device(pdev);
6319
6320         return rc;
6321 }
6322
6323 static void mwl8k_remove(struct pci_dev *pdev)
6324 {
6325         struct ieee80211_hw *hw = pci_get_drvdata(pdev);
6326         struct mwl8k_priv *priv;
6327         int i;
6328
6329         if (hw == NULL)
6330                 return;
6331         priv = hw->priv;
6332
6333         wait_for_completion(&priv->firmware_loading_complete);
6334
6335         if (priv->fw_state == FW_STATE_ERROR) {
6336                 mwl8k_hw_reset(priv);
6337                 goto unmap;
6338         }
6339
6340         ieee80211_stop_queues(hw);
6341
6342         ieee80211_unregister_hw(hw);
6343
6344         /* Remove TX reclaim and RX tasklets.  */
6345         tasklet_kill(&priv->poll_tx_task);
6346         tasklet_kill(&priv->poll_rx_task);
6347
6348         /* Stop hardware */
6349         mwl8k_hw_reset(priv);
6350
6351         /* Return all skbs to mac80211 */
6352         for (i = 0; i < mwl8k_tx_queues(priv); i++)
6353                 mwl8k_txq_reclaim(hw, i, INT_MAX, 1);
6354
6355         for (i = 0; i < mwl8k_tx_queues(priv); i++)
6356                 mwl8k_txq_deinit(hw, i);
6357
6358         mwl8k_rxq_deinit(hw, 0);
6359
6360         dma_free_coherent(&priv->pdev->dev, 4, priv->cookie, priv->cookie_dma);
6361
6362 unmap:
6363         pci_iounmap(pdev, priv->regs);
6364         pci_iounmap(pdev, priv->sram);
6365         ieee80211_free_hw(hw);
6366         pci_release_regions(pdev);
6367         pci_disable_device(pdev);
6368 }
6369
6370 static struct pci_driver mwl8k_driver = {
6371         .name           = MWL8K_NAME,
6372         .id_table       = mwl8k_pci_id_table,
6373         .probe          = mwl8k_probe,
6374         .remove         = mwl8k_remove,
6375 };
6376
6377 module_pci_driver(mwl8k_driver);
6378
6379 MODULE_DESCRIPTION(MWL8K_DESC);
6380 MODULE_VERSION(MWL8K_VERSION);
6381 MODULE_AUTHOR("Lennert Buytenhek <[email protected]>");
6382 MODULE_LICENSE("GPL");