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