drivers/net/wireless/marvell/mwl8k.c

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