drivers/net/wireless/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[4];
 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 = IEEE80211_BAND_2GHZ, .center_freq = 2412, .hw_value = 1, },
 350         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2417, .hw_value = 2, },
 351         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2422, .hw_value = 3, },
 352         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2427, .hw_value = 4, },
 353         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2432, .hw_value = 5, },
 354         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2437, .hw_value = 6, },
 355         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2442, .hw_value = 7, },
 356         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2447, .hw_value = 8, },
 357         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2452, .hw_value = 9, },
 358         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2457, .hw_value = 10, },
 359         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2462, .hw_value = 11, },
 360         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2467, .hw_value = 12, },
 361         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2472, .hw_value = 13, },
 362         { .band = IEEE80211_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 = IEEE80211_BAND_5GHZ, .center_freq = 5180, .hw_value = 36, },
 383         { .band = IEEE80211_BAND_5GHZ, .center_freq = 5200, .hw_value = 40, },
 384         { .band = IEEE80211_BAND_5GHZ, .center_freq = 5220, .hw_value = 44, },
 385         { .band = IEEE80211_BAND_5GHZ, .center_freq = 5240, .hw_value = 48, },
 386 };
 387
 388 static const struct ieee80211_rate mwl8k_rates_50[] = {
 389         { .bitrate = 60, .hw_value = 12, },
 390         { .bitrate = 90, .hw_value = 18, },
 391         { .bitrate = 120, .hw_value = 24, },
 392         { .bitrate = 180, .hw_value = 36, },
 393         { .bitrate = 240, .hw_value = 48, },
 394         { .bitrate = 360, .hw_value = 72, },
 395         { .bitrate = 480, .hw_value = 96, },
 396         { .bitrate = 540, .hw_value = 108, },
 397 };
 398
 399 /* Set or get info from Firmware */
 400 #define MWL8K_CMD_GET                   0x0000
 401 #define MWL8K_CMD_SET                   0x0001
 402 #define MWL8K_CMD_SET_LIST              0x0002
 403
 404 /* Firmware command codes */
 405 #define MWL8K_CMD_CODE_DNLD             0x0001
 406 #define MWL8K_CMD_GET_HW_SPEC           0x0003
 407 #define MWL8K_CMD_SET_HW_SPEC           0x0004
 408 #define MWL8K_CMD_MAC_MULTICAST_ADR     0x0010
 409 #define MWL8K_CMD_GET_STAT              0x0014
 410 #define MWL8K_CMD_BBP_REG_ACCESS        0x001a
 411 #define MWL8K_CMD_RADIO_CONTROL         0x001c
 412 #define MWL8K_CMD_RF_TX_POWER           0x001e
 413 #define MWL8K_CMD_TX_POWER              0x001f
 414 #define MWL8K_CMD_RF_ANTENNA            0x0020
 415 #define MWL8K_CMD_SET_BEACON            0x0100          /* per-vif */
 416 #define MWL8K_CMD_SET_PRE_SCAN          0x0107
 417 #define MWL8K_CMD_SET_POST_SCAN         0x0108
 418 #define MWL8K_CMD_SET_RF_CHANNEL        0x010a
 419 #define MWL8K_CMD_SET_AID               0x010d
 420 #define MWL8K_CMD_SET_RATE              0x0110
 421 #define MWL8K_CMD_SET_FINALIZE_JOIN     0x0111
 422 #define MWL8K_CMD_RTS_THRESHOLD         0x0113
 423 #define MWL8K_CMD_SET_SLOT              0x0114
 424 #define MWL8K_CMD_SET_EDCA_PARAMS       0x0115
 425 #define MWL8K_CMD_SET_WMM_MODE          0x0123
 426 #define MWL8K_CMD_MIMO_CONFIG           0x0125
 427 #define MWL8K_CMD_USE_FIXED_RATE        0x0126
 428 #define MWL8K_CMD_ENABLE_SNIFFER        0x0150
 429 #define MWL8K_CMD_SET_MAC_ADDR          0x0202          /* per-vif */
 430 #define MWL8K_CMD_SET_RATEADAPT_MODE    0x0203
 431 #define MWL8K_CMD_GET_WATCHDOG_BITMAP   0x0205
 432 #define MWL8K_CMD_DEL_MAC_ADDR          0x0206          /* per-vif */
 433 #define MWL8K_CMD_BSS_START             0x1100          /* per-vif */
 434 #define MWL8K_CMD_SET_NEW_STN           0x1111          /* per-vif */
 435 #define MWL8K_CMD_UPDATE_ENCRYPTION     0x1122          /* per-vif */
 436 #define MWL8K_CMD_UPDATE_STADB          0x1123
 437 #define MWL8K_CMD_BASTREAM              0x1125
 438
 439 static const char *mwl8k_cmd_name(__le16 cmd, char *buf, int bufsize)
 440 {
 441         u16 command = le16_to_cpu(cmd);
 442
 443 #define MWL8K_CMDNAME(x)        case MWL8K_CMD_##x: do {\
 444                                         snprintf(buf, bufsize, "%s", #x);\
 445                                         return buf;\
 446                                         } while (0)
 447         switch (command & ~0x8000) {
 448                 MWL8K_CMDNAME(CODE_DNLD);
 449                 MWL8K_CMDNAME(GET_HW_SPEC);
 450                 MWL8K_CMDNAME(SET_HW_SPEC);
 451                 MWL8K_CMDNAME(MAC_MULTICAST_ADR);
 452                 MWL8K_CMDNAME(GET_STAT);
 453                 MWL8K_CMDNAME(RADIO_CONTROL);
 454                 MWL8K_CMDNAME(RF_TX_POWER);
 455                 MWL8K_CMDNAME(TX_POWER);
 456                 MWL8K_CMDNAME(RF_ANTENNA);
 457                 MWL8K_CMDNAME(SET_BEACON);
 458                 MWL8K_CMDNAME(SET_PRE_SCAN);
 459                 MWL8K_CMDNAME(SET_POST_SCAN);
 460                 MWL8K_CMDNAME(SET_RF_CHANNEL);
 461                 MWL8K_CMDNAME(SET_AID);
 462                 MWL8K_CMDNAME(SET_RATE);
 463                 MWL8K_CMDNAME(SET_FINALIZE_JOIN);
 464                 MWL8K_CMDNAME(RTS_THRESHOLD);
 465                 MWL8K_CMDNAME(SET_SLOT);
 466                 MWL8K_CMDNAME(SET_EDCA_PARAMS);
 467                 MWL8K_CMDNAME(SET_WMM_MODE);
 468                 MWL8K_CMDNAME(MIMO_CONFIG);
 469                 MWL8K_CMDNAME(USE_FIXED_RATE);
 470                 MWL8K_CMDNAME(ENABLE_SNIFFER);
 471                 MWL8K_CMDNAME(SET_MAC_ADDR);
 472                 MWL8K_CMDNAME(SET_RATEADAPT_MODE);
 473                 MWL8K_CMDNAME(BSS_START);
 474                 MWL8K_CMDNAME(SET_NEW_STN);
 475                 MWL8K_CMDNAME(UPDATE_ENCRYPTION);
 476                 MWL8K_CMDNAME(UPDATE_STADB);
 477                 MWL8K_CMDNAME(BASTREAM);
 478                 MWL8K_CMDNAME(GET_WATCHDOG_BITMAP);
 479         default:
 480                 snprintf(buf, bufsize, "0x%x", cmd);
 481         }
 482 #undef MWL8K_CMDNAME
 483
 484         return buf;
 485 }
 486
 487 /* Hardware and firmware reset */
 488 static void mwl8k_hw_reset(struct mwl8k_priv *priv)
 489 {
 490         iowrite32(MWL8K_H2A_INT_RESET,
 491                 priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
 492         iowrite32(MWL8K_H2A_INT_RESET,
 493                 priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
 494         msleep(20);
 495 }
 496
 497 /* Release fw image */
 498 static void mwl8k_release_fw(const struct firmware **fw)
 499 {
 500         if (*fw == NULL)
 501                 return;
 502         release_firmware(*fw);
 503         *fw = NULL;
 504 }
 505
 506 static void mwl8k_release_firmware(struct mwl8k_priv *priv)
 507 {
 508         mwl8k_release_fw(&priv->fw_ucode);
 509         mwl8k_release_fw(&priv->fw_helper);
 510 }
 511
 512 /* states for asynchronous f/w loading */
 513 static void mwl8k_fw_state_machine(const struct firmware *fw, void *context);
 514 enum {
 515         FW_STATE_INIT = 0,
 516         FW_STATE_LOADING_PREF,
 517         FW_STATE_LOADING_ALT,
 518         FW_STATE_ERROR,
 519 };
 520
 521 /* Request fw image */
 522 static int mwl8k_request_fw(struct mwl8k_priv *priv,
 523                             const char *fname, const struct firmware **fw,
 524                             bool nowait)
 525 {
 526         /* release current image */
 527         if (*fw != NULL)
 528                 mwl8k_release_fw(fw);
 529
 530         if (nowait)
 531                 return request_firmware_nowait(THIS_MODULE, 1, fname,
 532                                                &priv->pdev->dev, GFP_KERNEL,
 533                                                priv, mwl8k_fw_state_machine);
 534         else
 535                 return request_firmware(fw, fname, &priv->pdev->dev);
 536 }
 537
 538 static int mwl8k_request_firmware(struct mwl8k_priv *priv, char *fw_image,
 539                                   bool nowait)
 540 {
 541         struct mwl8k_device_info *di = priv->device_info;
 542         int rc;
 543
 544         if (di->helper_image != NULL) {
 545                 if (nowait)
 546                         rc = mwl8k_request_fw(priv, di->helper_image,
 547                                               &priv->fw_helper, true);
 548                 else
 549                         rc = mwl8k_request_fw(priv, di->helper_image,
 550                                               &priv->fw_helper, false);
 551                 if (rc)
 552                         printk(KERN_ERR "%s: Error requesting helper fw %s\n",
 553                                pci_name(priv->pdev), di->helper_image);
 554
 555                 if (rc || nowait)
 556                         return rc;
 557         }
 558
 559         if (nowait) {
 560                 /*
 561                  * if we get here, no helper image is needed.  Skip the
 562                  * FW_STATE_INIT state.
 563                  */
 564                 priv->fw_state = FW_STATE_LOADING_PREF;
 565                 rc = mwl8k_request_fw(priv, fw_image,
 566                                       &priv->fw_ucode,
 567                                       true);
 568         } else
 569                 rc = mwl8k_request_fw(priv, fw_image,
 570                                       &priv->fw_ucode, false);
 571         if (rc) {
 572                 printk(KERN_ERR "%s: Error requesting firmware file %s\n",
 573                        pci_name(priv->pdev), fw_image);
 574                 mwl8k_release_fw(&priv->fw_helper);
 575                 return rc;
 576         }
 577
 578         return 0;
 579 }
 580
 581 struct mwl8k_cmd_pkt {
 582         __le16  code;
 583         __le16  length;
 584         __u8    seq_num;
 585         __u8    macid;
 586         __le16  result;
 587         char    payload[0];
 588 } __packed;
 589
 590 /*
 591  * Firmware loading.
 592  */
 593 static int
 594 mwl8k_send_fw_load_cmd(struct mwl8k_priv *priv, void *data, int length)
 595 {
 596         void __iomem *regs = priv->regs;
 597         dma_addr_t dma_addr;
 598         int loops;
 599
 600         dma_addr = pci_map_single(priv->pdev, data, length, PCI_DMA_TODEVICE);
 601         if (pci_dma_mapping_error(priv->pdev, dma_addr))
 602                 return -ENOMEM;
 603
 604         iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR);
 605         iowrite32(0, regs + MWL8K_HIU_INT_CODE);
 606         iowrite32(MWL8K_H2A_INT_DOORBELL,
 607                 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
 608         iowrite32(MWL8K_H2A_INT_DUMMY,
 609                 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
 610
 611         loops = 1000;
 612         do {
 613                 u32 int_code;
 614                 if (priv->is_8764) {
 615                         int_code = ioread32(regs +
 616                                             MWL8K_HIU_H2A_INTERRUPT_STATUS);
 617                         if (int_code == 0)
 618                                 break;
 619                 } else {
 620                         int_code = ioread32(regs + MWL8K_HIU_INT_CODE);
 621                         if (int_code == MWL8K_INT_CODE_CMD_FINISHED) {
 622                                 iowrite32(0, regs + MWL8K_HIU_INT_CODE);
 623                                 break;
 624                         }
 625                 }
 626                 cond_resched();
 627                 udelay(1);
 628         } while (--loops);
 629
 630         pci_unmap_single(priv->pdev, dma_addr, length, PCI_DMA_TODEVICE);
 631
 632         return loops ? 0 : -ETIMEDOUT;
 633 }
 634
 635 static int mwl8k_load_fw_image(struct mwl8k_priv *priv,
 636                                 const u8 *data, size_t length)
 637 {
 638         struct mwl8k_cmd_pkt *cmd;
 639         int done;
 640         int rc = 0;
 641
 642         cmd = kmalloc(sizeof(*cmd) + 256, GFP_KERNEL);
 643         if (cmd == NULL)
 644                 return -ENOMEM;
 645
 646         cmd->code = cpu_to_le16(MWL8K_CMD_CODE_DNLD);
 647         cmd->seq_num = 0;
 648         cmd->macid = 0;
 649         cmd->result = 0;
 650
 651         done = 0;
 652         while (length) {
 653                 int block_size = length > 256 ? 256 : length;
 654
 655                 memcpy(cmd->payload, data + done, block_size);
 656                 cmd->length = cpu_to_le16(block_size);
 657
 658                 rc = mwl8k_send_fw_load_cmd(priv, cmd,
 659                                                 sizeof(*cmd) + block_size);
 660                 if (rc)
 661                         break;
 662
 663                 done += block_size;
 664                 length -= block_size;
 665         }
 666
 667         if (!rc) {
 668                 cmd->length = 0;
 669                 rc = mwl8k_send_fw_load_cmd(priv, cmd, sizeof(*cmd));
 670         }
 671
 672         kfree(cmd);
 673
 674         return rc;
 675 }
 676
 677 static int mwl8k_feed_fw_image(struct mwl8k_priv *priv,
 678                                 const u8 *data, size_t length)
 679 {
 680         unsigned char *buffer;
 681         int may_continue, rc = 0;
 682         u32 done, prev_block_size;
 683
 684         buffer = kmalloc(1024, GFP_KERNEL);
 685         if (buffer == NULL)
 686                 return -ENOMEM;
 687
 688         done = 0;
 689         prev_block_size = 0;
 690         may_continue = 1000;
 691         while (may_continue > 0) {
 692                 u32 block_size;
 693
 694                 block_size = ioread32(priv->regs + MWL8K_HIU_SCRATCH);
 695                 if (block_size & 1) {
 696                         block_size &= ~1;
 697                         may_continue--;
 698                 } else {
 699                         done += prev_block_size;
 700                         length -= prev_block_size;
 701                 }
 702
 703                 if (block_size > 1024 || block_size > length) {
 704                         rc = -EOVERFLOW;
 705                         break;
 706                 }
 707
 708                 if (length == 0) {
 709                         rc = 0;
 710                         break;
 711                 }
 712
 713                 if (block_size == 0) {
 714                         rc = -EPROTO;
 715                         may_continue--;
 716                         udelay(1);
 717                         continue;
 718                 }
 719
 720                 prev_block_size = block_size;
 721                 memcpy(buffer, data + done, block_size);
 722
 723                 rc = mwl8k_send_fw_load_cmd(priv, buffer, block_size);
 724                 if (rc)
 725                         break;
 726         }
 727
 728         if (!rc && length != 0)
 729                 rc = -EREMOTEIO;
 730
 731         kfree(buffer);
 732
 733         return rc;
 734 }
 735
 736 static int mwl8k_load_firmware(struct ieee80211_hw *hw)
 737 {
 738         struct mwl8k_priv *priv = hw->priv;
 739         const struct firmware *fw = priv->fw_ucode;
 740         int rc;
 741         int loops;
 742
 743         if (!memcmp(fw->data, "\x01\x00\x00\x00", 4) && !priv->is_8764) {
 744                 const struct firmware *helper = priv->fw_helper;
 745
 746                 if (helper == NULL) {
 747                         printk(KERN_ERR "%s: helper image needed but none "
 748                                "given\n", pci_name(priv->pdev));
 749                         return -EINVAL;
 750                 }
 751
 752                 rc = mwl8k_load_fw_image(priv, helper->data, helper->size);
 753                 if (rc) {
 754                         printk(KERN_ERR "%s: unable to load firmware "
 755                                "helper image\n", pci_name(priv->pdev));
 756                         return rc;
 757                 }
 758                 msleep(20);
 759
 760                 rc = mwl8k_feed_fw_image(priv, fw->data, fw->size);
 761         } else {
 762                 if (priv->is_8764)
 763                         rc = mwl8k_feed_fw_image(priv, fw->data, fw->size);
 764                 else
 765                         rc = mwl8k_load_fw_image(priv, fw->data, fw->size);
 766         }
 767
 768         if (rc) {
 769                 printk(KERN_ERR "%s: unable to load firmware image\n",
 770                        pci_name(priv->pdev));
 771                 return rc;
 772         }
 773
 774         iowrite32(MWL8K_MODE_STA, priv->regs + MWL8K_HIU_GEN_PTR);
 775
 776         loops = 500000;
 777         do {
 778                 u32 ready_code;
 779
 780                 ready_code = ioread32(priv->regs + MWL8K_HIU_INT_CODE);
 781                 if (ready_code == MWL8K_FWAP_READY) {
 782                         priv->ap_fw = true;
 783                         break;
 784                 } else if (ready_code == MWL8K_FWSTA_READY) {
 785                         priv->ap_fw = false;
 786                         break;
 787                 }
 788
 789                 cond_resched();
 790                 udelay(1);
 791         } while (--loops);
 792
 793         return loops ? 0 : -ETIMEDOUT;
 794 }
 795
 796
 797 /* DMA header used by firmware and hardware.  */
 798 struct mwl8k_dma_data {
 799         __le16 fwlen;
 800         struct ieee80211_hdr wh;
 801         char data[0];
 802 } __packed;
 803
 804 /* Routines to add/remove DMA header from skb.  */
 805 static inline void mwl8k_remove_dma_header(struct sk_buff *skb, __le16 qos)
 806 {
 807         struct mwl8k_dma_data *tr;
 808         int hdrlen;
 809
 810         tr = (struct mwl8k_dma_data *)skb->data;
 811         hdrlen = ieee80211_hdrlen(tr->wh.frame_control);
 812
 813         if (hdrlen != sizeof(tr->wh)) {
 814                 if (ieee80211_is_data_qos(tr->wh.frame_control)) {
 815                         memmove(tr->data - hdrlen, &tr->wh, hdrlen - 2);
 816                         *((__le16 *)(tr->data - 2)) = qos;
 817                 } else {
 818                         memmove(tr->data - hdrlen, &tr->wh, hdrlen);
 819                 }
 820         }
 821
 822         if (hdrlen != sizeof(*tr))
 823                 skb_pull(skb, sizeof(*tr) - hdrlen);
 824 }
 825
 826 #define REDUCED_TX_HEADROOM     8
 827
 828 static void
 829 mwl8k_add_dma_header(struct mwl8k_priv *priv, struct sk_buff *skb,
 830                                                 int head_pad, int tail_pad)
 831 {
 832         struct ieee80211_hdr *wh;
 833         int hdrlen;
 834         int reqd_hdrlen;
 835         struct mwl8k_dma_data *tr;
 836
 837         /*
 838          * Add a firmware DMA header; the firmware requires that we
 839          * present a 2-byte payload length followed by a 4-address
 840          * header (without QoS field), followed (optionally) by any
 841          * WEP/ExtIV header (but only filled in for CCMP).
 842          */
 843         wh = (struct ieee80211_hdr *)skb->data;
 844
 845         hdrlen = ieee80211_hdrlen(wh->frame_control);
 846
 847         /*
 848          * Check if skb_resize is required because of
 849          * tx_headroom adjustment.
 850          */
 851         if (priv->ap_fw && (hdrlen < (sizeof(struct ieee80211_cts)
 852                                                 + REDUCED_TX_HEADROOM))) {
 853                 if (pskb_expand_head(skb, REDUCED_TX_HEADROOM, 0, GFP_ATOMIC)) {
 854
 855                         wiphy_err(priv->hw->wiphy,
 856                                         "Failed to reallocate TX buffer\n");
 857                         return;
 858                 }
 859                 skb->truesize += REDUCED_TX_HEADROOM;
 860         }
 861
 862         reqd_hdrlen = sizeof(*tr) + head_pad;
 863
 864         if (hdrlen != reqd_hdrlen)
 865                 skb_push(skb, reqd_hdrlen - hdrlen);
 866
 867         if (ieee80211_is_data_qos(wh->frame_control))
 868                 hdrlen -= IEEE80211_QOS_CTL_LEN;
 869
 870         tr = (struct mwl8k_dma_data *)skb->data;
 871         if (wh != &tr->wh)
 872                 memmove(&tr->wh, wh, hdrlen);
 873         if (hdrlen != sizeof(tr->wh))
 874                 memset(((void *)&tr->wh) + hdrlen, 0, sizeof(tr->wh) - hdrlen);
 875
 876         /*
 877          * Firmware length is the length of the fully formed "802.11
 878          * payload".  That is, everything except for the 802.11 header.
 879          * This includes all crypto material including the MIC.
 880          */
 881         tr->fwlen = cpu_to_le16(skb->len - sizeof(*tr) + tail_pad);
 882 }
 883
 884 static void mwl8k_encapsulate_tx_frame(struct mwl8k_priv *priv,
 885                 struct sk_buff *skb)
 886 {
 887         struct ieee80211_hdr *wh;
 888         struct ieee80211_tx_info *tx_info;
 889         struct ieee80211_key_conf *key_conf;
 890         int data_pad;
 891         int head_pad = 0;
 892
 893         wh = (struct ieee80211_hdr *)skb->data;
 894
 895         tx_info = IEEE80211_SKB_CB(skb);
 896
 897         key_conf = NULL;
 898         if (ieee80211_is_data(wh->frame_control))
 899                 key_conf = tx_info->control.hw_key;
 900
 901         /*
 902          * Make sure the packet header is in the DMA header format (4-address
 903          * without QoS), and add head & tail padding when HW crypto is enabled.
 904          *
 905          * We have the following trailer padding requirements:
 906          * - WEP: 4 trailer bytes (ICV)
 907          * - TKIP: 12 trailer bytes (8 MIC + 4 ICV)
 908          * - CCMP: 8 trailer bytes (MIC)
 909          */
 910         data_pad = 0;
 911         if (key_conf != NULL) {
 912                 head_pad = key_conf->iv_len;
 913                 switch (key_conf->cipher) {
 914                 case WLAN_CIPHER_SUITE_WEP40:
 915                 case WLAN_CIPHER_SUITE_WEP104:
 916                         data_pad = 4;
 917                         break;
 918                 case WLAN_CIPHER_SUITE_TKIP:
 919                         data_pad = 12;
 920                         break;
 921                 case WLAN_CIPHER_SUITE_CCMP:
 922                         data_pad = 8;
 923                         break;
 924                 }
 925         }
 926         mwl8k_add_dma_header(priv, skb, head_pad, data_pad);
 927 }
 928
 929 /*
 930  * Packet reception for 88w8366/88w8764 AP firmware.
 931  */
 932 struct mwl8k_rxd_ap {
 933         __le16 pkt_len;
 934         __u8 sq2;
 935         __u8 rate;
 936         __le32 pkt_phys_addr;
 937         __le32 next_rxd_phys_addr;
 938         __le16 qos_control;
 939         __le16 htsig2;
 940         __le32 hw_rssi_info;
 941         __le32 hw_noise_floor_info;
 942         __u8 noise_floor;
 943         __u8 pad0[3];
 944         __u8 rssi;
 945         __u8 rx_status;
 946         __u8 channel;
 947         __u8 rx_ctrl;
 948 } __packed;
 949
 950 #define MWL8K_AP_RATE_INFO_MCS_FORMAT           0x80
 951 #define MWL8K_AP_RATE_INFO_40MHZ                0x40
 952 #define MWL8K_AP_RATE_INFO_RATEID(x)            ((x) & 0x3f)
 953
 954 #define MWL8K_AP_RX_CTRL_OWNED_BY_HOST          0x80
 955
 956 /* 8366/8764 AP rx_status bits */
 957 #define MWL8K_AP_RXSTAT_DECRYPT_ERR_MASK                0x80
 958 #define MWL8K_AP_RXSTAT_GENERAL_DECRYPT_ERR             0xFF
 959 #define MWL8K_AP_RXSTAT_TKIP_DECRYPT_MIC_ERR            0x02
 960 #define MWL8K_AP_RXSTAT_WEP_DECRYPT_ICV_ERR             0x04
 961 #define MWL8K_AP_RXSTAT_TKIP_DECRYPT_ICV_ERR            0x08
 962
 963 static void mwl8k_rxd_ap_init(void *_rxd, dma_addr_t next_dma_addr)
 964 {
 965         struct mwl8k_rxd_ap *rxd = _rxd;
 966
 967         rxd->next_rxd_phys_addr = cpu_to_le32(next_dma_addr);
 968         rxd->rx_ctrl = MWL8K_AP_RX_CTRL_OWNED_BY_HOST;
 969 }
 970
 971 static void mwl8k_rxd_ap_refill(void *_rxd, dma_addr_t addr, int len)
 972 {
 973         struct mwl8k_rxd_ap *rxd = _rxd;
 974
 975         rxd->pkt_len = cpu_to_le16(len);
 976         rxd->pkt_phys_addr = cpu_to_le32(addr);
 977         wmb();
 978         rxd->rx_ctrl = 0;
 979 }
 980
 981 static int
 982 mwl8k_rxd_ap_process(void *_rxd, struct ieee80211_rx_status *status,
 983                      __le16 *qos, s8 *noise)
 984 {
 985         struct mwl8k_rxd_ap *rxd = _rxd;
 986
 987         if (!(rxd->rx_ctrl & MWL8K_AP_RX_CTRL_OWNED_BY_HOST))
 988                 return -1;
 989         rmb();
 990
 991         memset(status, 0, sizeof(*status));
 992
 993         status->signal = -rxd->rssi;
 994         *noise = -rxd->noise_floor;
 995
 996         if (rxd->rate & MWL8K_AP_RATE_INFO_MCS_FORMAT) {
 997                 status->flag |= RX_FLAG_HT;
 998                 if (rxd->rate & MWL8K_AP_RATE_INFO_40MHZ)
 999                         status->flag |= RX_FLAG_40MHZ;
1000                 status->rate_idx = MWL8K_AP_RATE_INFO_RATEID(rxd->rate);
1001         } else {
1002                 int i;
1003
1004                 for (i = 0; i < ARRAY_SIZE(mwl8k_rates_24); i++) {
1005                         if (mwl8k_rates_24[i].hw_value == rxd->rate) {
1006                                 status->rate_idx = i;
1007                                 break;
1008                         }
1009                 }
1010         }
1011
1012         if (rxd->channel > 14) {
1013                 status->band = IEEE80211_BAND_5GHZ;
1014                 if (!(status->flag & RX_FLAG_HT))
1015                         status->rate_idx -= 5;
1016         } else {
1017                 status->band = IEEE80211_BAND_2GHZ;
1018         }
1019         status->freq = ieee80211_channel_to_frequency(rxd->channel,
1020                                                       status->band);
1021
1022         *qos = rxd->qos_control;
1023
1024         if ((rxd->rx_status != MWL8K_AP_RXSTAT_GENERAL_DECRYPT_ERR) &&
1025             (rxd->rx_status & MWL8K_AP_RXSTAT_DECRYPT_ERR_MASK) &&
1026             (rxd->rx_status & MWL8K_AP_RXSTAT_TKIP_DECRYPT_MIC_ERR))
1027                 status->flag |= RX_FLAG_MMIC_ERROR;
1028
1029         return le16_to_cpu(rxd->pkt_len);
1030 }
1031
1032 static struct rxd_ops rxd_ap_ops = {
1033         .rxd_size       = sizeof(struct mwl8k_rxd_ap),
1034         .rxd_init       = mwl8k_rxd_ap_init,
1035         .rxd_refill     = mwl8k_rxd_ap_refill,
1036         .rxd_process    = mwl8k_rxd_ap_process,
1037 };
1038
1039 /*
1040  * Packet reception for STA firmware.
1041  */
1042 struct mwl8k_rxd_sta {
1043         __le16 pkt_len;
1044         __u8 link_quality;
1045         __u8 noise_level;
1046         __le32 pkt_phys_addr;
1047         __le32 next_rxd_phys_addr;
1048         __le16 qos_control;
1049         __le16 rate_info;
1050         __le32 pad0[4];
1051         __u8 rssi;
1052         __u8 channel;
1053         __le16 pad1;
1054         __u8 rx_ctrl;
1055         __u8 rx_status;
1056         __u8 pad2[2];
1057 } __packed;
1058
1059 #define MWL8K_STA_RATE_INFO_SHORTPRE            0x8000
1060 #define MWL8K_STA_RATE_INFO_ANTSELECT(x)        (((x) >> 11) & 0x3)
1061 #define MWL8K_STA_RATE_INFO_RATEID(x)           (((x) >> 3) & 0x3f)
1062 #define MWL8K_STA_RATE_INFO_40MHZ               0x0004
1063 #define MWL8K_STA_RATE_INFO_SHORTGI             0x0002
1064 #define MWL8K_STA_RATE_INFO_MCS_FORMAT          0x0001
1065
1066 #define MWL8K_STA_RX_CTRL_OWNED_BY_HOST         0x02
1067 #define MWL8K_STA_RX_CTRL_DECRYPT_ERROR         0x04
1068 /* ICV=0 or MIC=1 */
1069 #define MWL8K_STA_RX_CTRL_DEC_ERR_TYPE          0x08
1070 /* Key is uploaded only in failure case */
1071 #define MWL8K_STA_RX_CTRL_KEY_INDEX                     0x30
1072
1073 static void mwl8k_rxd_sta_init(void *_rxd, dma_addr_t next_dma_addr)
1074 {
1075         struct mwl8k_rxd_sta *rxd = _rxd;
1076
1077         rxd->next_rxd_phys_addr = cpu_to_le32(next_dma_addr);
1078         rxd->rx_ctrl = MWL8K_STA_RX_CTRL_OWNED_BY_HOST;
1079 }
1080
1081 static void mwl8k_rxd_sta_refill(void *_rxd, dma_addr_t addr, int len)
1082 {
1083         struct mwl8k_rxd_sta *rxd = _rxd;
1084
1085         rxd->pkt_len = cpu_to_le16(len);
1086         rxd->pkt_phys_addr = cpu_to_le32(addr);
1087         wmb();
1088         rxd->rx_ctrl = 0;
1089 }
1090
1091 static int
1092 mwl8k_rxd_sta_process(void *_rxd, struct ieee80211_rx_status *status,
1093                        __le16 *qos, s8 *noise)
1094 {
1095         struct mwl8k_rxd_sta *rxd = _rxd;
1096         u16 rate_info;
1097
1098         if (!(rxd->rx_ctrl & MWL8K_STA_RX_CTRL_OWNED_BY_HOST))
1099                 return -1;
1100         rmb();
1101
1102         rate_info = le16_to_cpu(rxd->rate_info);
1103
1104         memset(status, 0, sizeof(*status));
1105
1106         status->signal = -rxd->rssi;
1107         *noise = -rxd->noise_level;
1108         status->antenna = MWL8K_STA_RATE_INFO_ANTSELECT(rate_info);
1109         status->rate_idx = MWL8K_STA_RATE_INFO_RATEID(rate_info);
1110
1111         if (rate_info & MWL8K_STA_RATE_INFO_SHORTPRE)
1112                 status->flag |= RX_FLAG_SHORTPRE;
1113         if (rate_info & MWL8K_STA_RATE_INFO_40MHZ)
1114                 status->flag |= RX_FLAG_40MHZ;
1115         if (rate_info & MWL8K_STA_RATE_INFO_SHORTGI)
1116                 status->flag |= RX_FLAG_SHORT_GI;
1117         if (rate_info & MWL8K_STA_RATE_INFO_MCS_FORMAT)
1118                 status->flag |= RX_FLAG_HT;
1119
1120         if (rxd->channel > 14) {
1121                 status->band = IEEE80211_BAND_5GHZ;
1122                 if (!(status->flag & RX_FLAG_HT))
1123                         status->rate_idx -= 5;
1124         } else {
1125                 status->band = IEEE80211_BAND_2GHZ;
1126         }
1127         status->freq = ieee80211_channel_to_frequency(rxd->channel,
1128                                                       status->band);
1129
1130         *qos = rxd->qos_control;
1131         if ((rxd->rx_ctrl & MWL8K_STA_RX_CTRL_DECRYPT_ERROR) &&
1132             (rxd->rx_ctrl & MWL8K_STA_RX_CTRL_DEC_ERR_TYPE))
1133                 status->flag |= RX_FLAG_MMIC_ERROR;
1134
1135         return le16_to_cpu(rxd->pkt_len);
1136 }
1137
1138 static struct rxd_ops rxd_sta_ops = {
1139         .rxd_size       = sizeof(struct mwl8k_rxd_sta),
1140         .rxd_init       = mwl8k_rxd_sta_init,
1141         .rxd_refill     = mwl8k_rxd_sta_refill,
1142         .rxd_process    = mwl8k_rxd_sta_process,
1143 };
1144
1145
1146 #define MWL8K_RX_DESCS          256
1147 #define MWL8K_RX_MAXSZ          3800
1148
1149 static int mwl8k_rxq_init(struct ieee80211_hw *hw, int index)
1150 {
1151         struct mwl8k_priv *priv = hw->priv;
1152         struct mwl8k_rx_queue *rxq = priv->rxq + index;
1153         int size;
1154         int i;
1155
1156         rxq->rxd_count = 0;
1157         rxq->head = 0;
1158         rxq->tail = 0;
1159
1160         size = MWL8K_RX_DESCS * priv->rxd_ops->rxd_size;
1161
1162         rxq->rxd = pci_alloc_consistent(priv->pdev, size, &rxq->rxd_dma);
1163         if (rxq->rxd == NULL) {
1164                 wiphy_err(hw->wiphy, "failed to alloc RX descriptors\n");
1165                 return -ENOMEM;
1166         }
1167         memset(rxq->rxd, 0, size);
1168
1169         rxq->buf = kcalloc(MWL8K_RX_DESCS, sizeof(*rxq->buf), GFP_KERNEL);
1170         if (rxq->buf == NULL) {
1171                 pci_free_consistent(priv->pdev, size, rxq->rxd, rxq->rxd_dma);
1172                 return -ENOMEM;
1173         }
1174
1175         for (i = 0; i < MWL8K_RX_DESCS; i++) {
1176                 int desc_size;
1177                 void *rxd;
1178                 int nexti;
1179                 dma_addr_t next_dma_addr;
1180
1181                 desc_size = priv->rxd_ops->rxd_size;
1182                 rxd = rxq->rxd + (i * priv->rxd_ops->rxd_size);
1183
1184                 nexti = i + 1;
1185                 if (nexti == MWL8K_RX_DESCS)
1186                         nexti = 0;
1187                 next_dma_addr = rxq->rxd_dma + (nexti * desc_size);
1188
1189                 priv->rxd_ops->rxd_init(rxd, next_dma_addr);
1190         }
1191
1192         return 0;
1193 }
1194
1195 static int rxq_refill(struct ieee80211_hw *hw, int index, int limit)
1196 {
1197         struct mwl8k_priv *priv = hw->priv;
1198         struct mwl8k_rx_queue *rxq = priv->rxq + index;
1199         int refilled;
1200
1201         refilled = 0;
1202         while (rxq->rxd_count < MWL8K_RX_DESCS && limit--) {
1203                 struct sk_buff *skb;
1204                 dma_addr_t addr;
1205                 int rx;
1206                 void *rxd;
1207
1208                 skb = dev_alloc_skb(MWL8K_RX_MAXSZ);
1209                 if (skb == NULL)
1210                         break;
1211
1212                 addr = pci_map_single(priv->pdev, skb->data,
1213                                       MWL8K_RX_MAXSZ, DMA_FROM_DEVICE);
1214
1215                 rxq->rxd_count++;
1216                 rx = rxq->tail++;
1217                 if (rxq->tail == MWL8K_RX_DESCS)
1218                         rxq->tail = 0;
1219                 rxq->buf[rx].skb = skb;
1220                 dma_unmap_addr_set(&rxq->buf[rx], dma, addr);
1221
1222                 rxd = rxq->rxd + (rx * priv->rxd_ops->rxd_size);
1223                 priv->rxd_ops->rxd_refill(rxd, addr, MWL8K_RX_MAXSZ);
1224
1225                 refilled++;
1226         }
1227
1228         return refilled;
1229 }
1230
1231 /* Must be called only when the card's reception is completely halted */
1232 static void mwl8k_rxq_deinit(struct ieee80211_hw *hw, int index)
1233 {
1234         struct mwl8k_priv *priv = hw->priv;
1235         struct mwl8k_rx_queue *rxq = priv->rxq + index;
1236         int i;
1237
1238         if (rxq->rxd == NULL)
1239                 return;
1240
1241         for (i = 0; i < MWL8K_RX_DESCS; i++) {
1242                 if (rxq->buf[i].skb != NULL) {
1243                         pci_unmap_single(priv->pdev,
1244                                          dma_unmap_addr(&rxq->buf[i], dma),
1245                                          MWL8K_RX_MAXSZ, PCI_DMA_FROMDEVICE);
1246                         dma_unmap_addr_set(&rxq->buf[i], dma, 0);
1247
1248                         kfree_skb(rxq->buf[i].skb);
1249                         rxq->buf[i].skb = NULL;
1250                 }
1251         }
1252
1253         kfree(rxq->buf);
1254         rxq->buf = NULL;
1255
1256         pci_free_consistent(priv->pdev,
1257                             MWL8K_RX_DESCS * priv->rxd_ops->rxd_size,
1258                             rxq->rxd, rxq->rxd_dma);
1259         rxq->rxd = NULL;
1260 }
1261
1262
1263 /*
1264  * Scan a list of BSSIDs to process for finalize join.
1265  * Allows for extension to process multiple BSSIDs.
1266  */
1267 static inline int
1268 mwl8k_capture_bssid(struct mwl8k_priv *priv, struct ieee80211_hdr *wh)
1269 {
1270         return priv->capture_beacon &&
1271                 ieee80211_is_beacon(wh->frame_control) &&
1272                 ether_addr_equal_64bits(wh->addr3, priv->capture_bssid);
1273 }
1274
1275 static inline void mwl8k_save_beacon(struct ieee80211_hw *hw,
1276                                      struct sk_buff *skb)
1277 {
1278         struct mwl8k_priv *priv = hw->priv;
1279
1280         priv->capture_beacon = false;
1281         memset(priv->capture_bssid, 0, ETH_ALEN);
1282
1283         /*
1284          * Use GFP_ATOMIC as rxq_process is called from
1285          * the primary interrupt handler, memory allocation call
1286          * must not sleep.
1287          */
1288         priv->beacon_skb = skb_copy(skb, GFP_ATOMIC);
1289         if (priv->beacon_skb != NULL)
1290                 ieee80211_queue_work(hw, &priv->finalize_join_worker);
1291 }
1292
1293 static inline struct mwl8k_vif *mwl8k_find_vif_bss(struct list_head *vif_list,
1294                                                    u8 *bssid)
1295 {
1296         struct mwl8k_vif *mwl8k_vif;
1297
1298         list_for_each_entry(mwl8k_vif,
1299                             vif_list, list) {
1300                 if (memcmp(bssid, mwl8k_vif->bssid,
1301                            ETH_ALEN) == 0)
1302                         return mwl8k_vif;
1303         }
1304
1305         return NULL;
1306 }
1307
1308 static int rxq_process(struct ieee80211_hw *hw, int index, int limit)
1309 {
1310         struct mwl8k_priv *priv = hw->priv;
1311         struct mwl8k_vif *mwl8k_vif = NULL;
1312         struct mwl8k_rx_queue *rxq = priv->rxq + index;
1313         int processed;
1314
1315         processed = 0;
1316         while (rxq->rxd_count && limit--) {
1317                 struct sk_buff *skb;
1318                 void *rxd;
1319                 int pkt_len;
1320                 struct ieee80211_rx_status status;
1321                 struct ieee80211_hdr *wh;
1322                 __le16 qos;
1323
1324                 skb = rxq->buf[rxq->head].skb;
1325                 if (skb == NULL)
1326                         break;
1327
1328                 rxd = rxq->rxd + (rxq->head * priv->rxd_ops->rxd_size);
1329
1330                 pkt_len = priv->rxd_ops->rxd_process(rxd, &status, &qos,
1331                                                         &priv->noise);
1332                 if (pkt_len < 0)
1333                         break;
1334
1335                 rxq->buf[rxq->head].skb = NULL;
1336
1337                 pci_unmap_single(priv->pdev,
1338                                  dma_unmap_addr(&rxq->buf[rxq->head], dma),
1339                                  MWL8K_RX_MAXSZ, PCI_DMA_FROMDEVICE);
1340                 dma_unmap_addr_set(&rxq->buf[rxq->head], dma, 0);
1341
1342                 rxq->head++;
1343                 if (rxq->head == MWL8K_RX_DESCS)
1344                         rxq->head = 0;
1345
1346                 rxq->rxd_count--;
1347
1348                 wh = &((struct mwl8k_dma_data *)skb->data)->wh;
1349
1350                 /*
1351                  * Check for a pending join operation.  Save a
1352                  * copy of the beacon and schedule a tasklet to
1353                  * send a FINALIZE_JOIN command to the firmware.
1354                  */
1355                 if (mwl8k_capture_bssid(priv, (void *)skb->data))
1356                         mwl8k_save_beacon(hw, skb);
1357
1358                 if (ieee80211_has_protected(wh->frame_control)) {
1359
1360                         /* Check if hw crypto has been enabled for
1361                          * this bss. If yes, set the status flags
1362                          * accordingly
1363                          */
1364                         mwl8k_vif = mwl8k_find_vif_bss(&priv->vif_list,
1365                                                                 wh->addr1);
1366
1367                         if (mwl8k_vif != NULL &&
1368                             mwl8k_vif->is_hw_crypto_enabled) {
1369                                 /*
1370                                  * When MMIC ERROR is encountered
1371                                  * by the firmware, payload is
1372                                  * dropped and only 32 bytes of
1373                                  * mwl8k Firmware header is sent
1374                                  * to the host.
1375                                  *
1376                                  * We need to add four bytes of
1377                                  * key information.  In it
1378                                  * MAC80211 expects keyidx set to
1379                                  * 0 for triggering Counter
1380                                  * Measure of MMIC failure.
1381                                  */
1382                                 if (status.flag & RX_FLAG_MMIC_ERROR) {
1383                                         struct mwl8k_dma_data *tr;
1384                                         tr = (struct mwl8k_dma_data *)skb->data;
1385                                         memset((void *)&(tr->data), 0, 4);
1386                                         pkt_len += 4;
1387                                 }
1388
1389                                 if (!ieee80211_is_auth(wh->frame_control))
1390                                         status.flag |= RX_FLAG_IV_STRIPPED |
1391                                                        RX_FLAG_DECRYPTED |
1392                                                        RX_FLAG_MMIC_STRIPPED;
1393                         }
1394                 }
1395
1396                 skb_put(skb, pkt_len);
1397                 mwl8k_remove_dma_header(skb, qos);
1398                 memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
1399                 ieee80211_rx_irqsafe(hw, skb);
1400
1401                 processed++;
1402         }
1403
1404         return processed;
1405 }
1406
1407
1408 /*
1409  * Packet transmission.
1410  */
1411
1412 #define MWL8K_TXD_STATUS_OK                     0x00000001
1413 #define MWL8K_TXD_STATUS_OK_RETRY               0x00000002
1414 #define MWL8K_TXD_STATUS_OK_MORE_RETRY          0x00000004
1415 #define MWL8K_TXD_STATUS_MULTICAST_TX           0x00000008
1416 #define MWL8K_TXD_STATUS_FW_OWNED               0x80000000
1417
1418 #define MWL8K_QOS_QLEN_UNSPEC                   0xff00
1419 #define MWL8K_QOS_ACK_POLICY_MASK               0x0060
1420 #define MWL8K_QOS_ACK_POLICY_NORMAL             0x0000
1421 #define MWL8K_QOS_ACK_POLICY_BLOCKACK           0x0060
1422 #define MWL8K_QOS_EOSP                          0x0010
1423
1424 struct mwl8k_tx_desc {
1425         __le32 status;
1426         __u8 data_rate;
1427         __u8 tx_priority;
1428         __le16 qos_control;
1429         __le32 pkt_phys_addr;
1430         __le16 pkt_len;
1431         __u8 dest_MAC_addr[ETH_ALEN];
1432         __le32 next_txd_phys_addr;
1433         __le32 timestamp;
1434         __le16 rate_info;
1435         __u8 peer_id;
1436         __u8 tx_frag_cnt;
1437 } __packed;
1438
1439 #define MWL8K_TX_DESCS          128
1440
1441 static int mwl8k_txq_init(struct ieee80211_hw *hw, int index)
1442 {
1443         struct mwl8k_priv *priv = hw->priv;
1444         struct mwl8k_tx_queue *txq = priv->txq + index;
1445         int size;
1446         int i;
1447
1448         txq->len = 0;
1449         txq->head = 0;
1450         txq->tail = 0;
1451
1452         size = MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc);
1453
1454         txq->txd = pci_alloc_consistent(priv->pdev, size, &txq->txd_dma);
1455         if (txq->txd == NULL) {
1456                 wiphy_err(hw->wiphy, "failed to alloc TX descriptors\n");
1457                 return -ENOMEM;
1458         }
1459         memset(txq->txd, 0, size);
1460
1461         txq->skb = kcalloc(MWL8K_TX_DESCS, sizeof(*txq->skb), GFP_KERNEL);
1462         if (txq->skb == NULL) {
1463                 pci_free_consistent(priv->pdev, size, txq->txd, txq->txd_dma);
1464                 return -ENOMEM;
1465         }
1466
1467         for (i = 0; i < MWL8K_TX_DESCS; i++) {
1468                 struct mwl8k_tx_desc *tx_desc;
1469                 int nexti;
1470
1471                 tx_desc = txq->txd + i;
1472                 nexti = (i + 1) % MWL8K_TX_DESCS;
1473
1474                 tx_desc->status = 0;
1475                 tx_desc->next_txd_phys_addr =
1476                         cpu_to_le32(txq->txd_dma + nexti * sizeof(*tx_desc));
1477         }
1478
1479         return 0;
1480 }
1481
1482 static inline void mwl8k_tx_start(struct mwl8k_priv *priv)
1483 {
1484         iowrite32(MWL8K_H2A_INT_PPA_READY,
1485                 priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
1486         iowrite32(MWL8K_H2A_INT_DUMMY,
1487                 priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
1488         ioread32(priv->regs + MWL8K_HIU_INT_CODE);
1489 }
1490
1491 static void mwl8k_dump_tx_rings(struct ieee80211_hw *hw)
1492 {
1493         struct mwl8k_priv *priv = hw->priv;
1494         int i;
1495
1496         for (i = 0; i < mwl8k_tx_queues(priv); i++) {
1497                 struct mwl8k_tx_queue *txq = priv->txq + i;
1498                 int fw_owned = 0;
1499                 int drv_owned = 0;
1500                 int unused = 0;
1501                 int desc;
1502
1503                 for (desc = 0; desc < MWL8K_TX_DESCS; desc++) {
1504                         struct mwl8k_tx_desc *tx_desc = txq->txd + desc;
1505                         u32 status;
1506
1507                         status = le32_to_cpu(tx_desc->status);
1508                         if (status & MWL8K_TXD_STATUS_FW_OWNED)
1509                                 fw_owned++;
1510                         else
1511                                 drv_owned++;
1512
1513                         if (tx_desc->pkt_len == 0)
1514                                 unused++;
1515                 }
1516
1517                 wiphy_err(hw->wiphy,
1518                           "txq[%d] len=%d head=%d tail=%d "
1519                           "fw_owned=%d drv_owned=%d unused=%d\n",
1520                           i,
1521                           txq->len, txq->head, txq->tail,
1522                           fw_owned, drv_owned, unused);
1523         }
1524 }
1525
1526 /*
1527  * Must be called with priv->fw_mutex held and tx queues stopped.
1528  */
1529 #define MWL8K_TX_WAIT_TIMEOUT_MS        5000
1530
1531 static int mwl8k_tx_wait_empty(struct ieee80211_hw *hw)
1532 {
1533         struct mwl8k_priv *priv = hw->priv;
1534         DECLARE_COMPLETION_ONSTACK(tx_wait);
1535         int retry;
1536         int rc;
1537
1538         might_sleep();
1539
1540         /* Since fw restart is in progress, allow only the firmware
1541          * commands from the restart code and block the other
1542          * commands since they are going to fail in any case since
1543          * the firmware has crashed
1544          */
1545         if (priv->hw_restart_in_progress) {
1546                 if (priv->hw_restart_owner == current)
1547                         return 0;
1548                 else
1549                         return -EBUSY;
1550         }
1551
1552         if (atomic_read(&priv->watchdog_event_pending))
1553                 return 0;
1554
1555         /*
1556          * The TX queues are stopped at this point, so this test
1557          * doesn't need to take ->tx_lock.
1558          */
1559         if (!priv->pending_tx_pkts)
1560                 return 0;
1561
1562         retry = 1;
1563         rc = 0;
1564
1565         spin_lock_bh(&priv->tx_lock);
1566         priv->tx_wait = &tx_wait;
1567         while (!rc) {
1568                 int oldcount;
1569                 unsigned long timeout;
1570
1571                 oldcount = priv->pending_tx_pkts;
1572
1573                 spin_unlock_bh(&priv->tx_lock);
1574                 timeout = wait_for_completion_timeout(&tx_wait,
1575                             msecs_to_jiffies(MWL8K_TX_WAIT_TIMEOUT_MS));
1576
1577                 if (atomic_read(&priv->watchdog_event_pending)) {
1578                         spin_lock_bh(&priv->tx_lock);
1579                         priv->tx_wait = NULL;
1580                         spin_unlock_bh(&priv->tx_lock);
1581                         return 0;
1582                 }
1583
1584                 spin_lock_bh(&priv->tx_lock);
1585
1586                 if (timeout || !priv->pending_tx_pkts) {
1587                         WARN_ON(priv->pending_tx_pkts);
1588                         if (retry)
1589                                 wiphy_notice(hw->wiphy, "tx rings drained\n");
1590                         break;
1591                 }
1592
1593                 if (retry) {
1594                         mwl8k_tx_start(priv);
1595                         retry = 0;
1596                         continue;
1597                 }
1598
1599                 if (priv->pending_tx_pkts < oldcount) {
1600                         wiphy_notice(hw->wiphy,
1601                                      "waiting for tx rings to drain (%d -> %d pkts)\n",
1602                                      oldcount, priv->pending_tx_pkts);
1603                         retry = 1;
1604                         continue;
1605                 }
1606
1607                 priv->tx_wait = NULL;
1608
1609                 wiphy_err(hw->wiphy, "tx rings stuck for %d ms\n",
1610                           MWL8K_TX_WAIT_TIMEOUT_MS);
1611                 mwl8k_dump_tx_rings(hw);
1612                 priv->hw_restart_in_progress = true;
1613                 ieee80211_queue_work(hw, &priv->fw_reload);
1614
1615                 rc = -ETIMEDOUT;
1616         }
1617         priv->tx_wait = NULL;
1618         spin_unlock_bh(&priv->tx_lock);
1619
1620         return rc;
1621 }
1622
1623 #define MWL8K_TXD_SUCCESS(status)                               \
1624         ((status) & (MWL8K_TXD_STATUS_OK |                      \
1625                      MWL8K_TXD_STATUS_OK_RETRY |                \
1626                      MWL8K_TXD_STATUS_OK_MORE_RETRY))
1627
1628 static int mwl8k_tid_queue_mapping(u8 tid)
1629 {
1630         BUG_ON(tid > 7);
1631
1632         switch (tid) {
1633         case 0:
1634         case 3:
1635                 return IEEE80211_AC_BE;
1636                 break;
1637         case 1:
1638         case 2:
1639                 return IEEE80211_AC_BK;
1640                 break;
1641         case 4:
1642         case 5:
1643                 return IEEE80211_AC_VI;
1644                 break;
1645         case 6:
1646         case 7:
1647                 return IEEE80211_AC_VO;
1648                 break;
1649         default:
1650                 return -1;
1651                 break;
1652         }
1653 }
1654
1655 /* The firmware will fill in the rate information
1656  * for each packet that gets queued in the hardware
1657  * and these macros will interpret that info.
1658  */
1659
1660 #define RI_FORMAT(a)              (a & 0x0001)
1661 #define RI_RATE_ID_MCS(a)        ((a & 0x01f8) >> 3)
1662
1663 static int
1664 mwl8k_txq_reclaim(struct ieee80211_hw *hw, int index, int limit, int force)
1665 {
1666         struct mwl8k_priv *priv = hw->priv;
1667         struct mwl8k_tx_queue *txq = priv->txq + index;
1668         int processed;
1669
1670         processed = 0;
1671         while (txq->len > 0 && limit--) {
1672                 int tx;
1673                 struct mwl8k_tx_desc *tx_desc;
1674                 unsigned long addr;
1675                 int size;
1676                 struct sk_buff *skb;
1677                 struct ieee80211_tx_info *info;
1678                 u32 status;
1679                 struct ieee80211_sta *sta;
1680                 struct mwl8k_sta *sta_info = NULL;
1681                 u16 rate_info;
1682                 struct ieee80211_hdr *wh;
1683
1684                 tx = txq->head;
1685                 tx_desc = txq->txd + tx;
1686
1687                 status = le32_to_cpu(tx_desc->status);
1688
1689                 if (status & MWL8K_TXD_STATUS_FW_OWNED) {
1690                         if (!force)
1691                                 break;
1692                         tx_desc->status &=
1693                                 ~cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED);
1694                 }
1695
1696                 txq->head = (tx + 1) % MWL8K_TX_DESCS;
1697                 BUG_ON(txq->len == 0);
1698                 txq->len--;
1699                 priv->pending_tx_pkts--;
1700
1701                 addr = le32_to_cpu(tx_desc->pkt_phys_addr);
1702                 size = le16_to_cpu(tx_desc->pkt_len);
1703                 skb = txq->skb[tx];
1704                 txq->skb[tx] = NULL;
1705
1706                 BUG_ON(skb == NULL);
1707                 pci_unmap_single(priv->pdev, addr, size, PCI_DMA_TODEVICE);
1708
1709                 mwl8k_remove_dma_header(skb, tx_desc->qos_control);
1710
1711                 wh = (struct ieee80211_hdr *) skb->data;
1712
1713                 /* Mark descriptor as unused */
1714                 tx_desc->pkt_phys_addr = 0;
1715                 tx_desc->pkt_len = 0;
1716
1717                 info = IEEE80211_SKB_CB(skb);
1718                 if (ieee80211_is_data(wh->frame_control)) {
1719                         rcu_read_lock();
1720                         sta = ieee80211_find_sta_by_ifaddr(hw, wh->addr1,
1721                                                            wh->addr2);
1722                         if (sta) {
1723                                 sta_info = MWL8K_STA(sta);
1724                                 BUG_ON(sta_info == NULL);
1725                                 rate_info = le16_to_cpu(tx_desc->rate_info);
1726                                 /* If rate is < 6.5 Mpbs for an ht station
1727                                  * do not form an ampdu. If the station is a
1728                                  * legacy station (format = 0), do not form an
1729                                  * ampdu
1730                                  */
1731                                 if (RI_RATE_ID_MCS(rate_info) < 1 ||
1732                                     RI_FORMAT(rate_info) == 0) {
1733                                         sta_info->is_ampdu_allowed = false;
1734                                 } else {
1735                                         sta_info->is_ampdu_allowed = true;
1736                                 }
1737                         }
1738                         rcu_read_unlock();
1739                 }
1740
1741                 ieee80211_tx_info_clear_status(info);
1742
1743                 /* Rate control is happening in the firmware.
1744                  * Ensure no tx rate is being reported.
1745                  */
1746                 info->status.rates[0].idx = -1;
1747                 info->status.rates[0].count = 1;
1748
1749                 if (MWL8K_TXD_SUCCESS(status))
1750                         info->flags |= IEEE80211_TX_STAT_ACK;
1751
1752                 ieee80211_tx_status_irqsafe(hw, skb);
1753
1754                 processed++;
1755         }
1756
1757         return processed;
1758 }
1759
1760 /* must be called only when the card's transmit is completely halted */
1761 static void mwl8k_txq_deinit(struct ieee80211_hw *hw, int index)
1762 {
1763         struct mwl8k_priv *priv = hw->priv;
1764         struct mwl8k_tx_queue *txq = priv->txq + index;
1765
1766         if (txq->txd == NULL)
1767                 return;
1768
1769         mwl8k_txq_reclaim(hw, index, INT_MAX, 1);
1770
1771         kfree(txq->skb);
1772         txq->skb = NULL;
1773
1774         pci_free_consistent(priv->pdev,
1775                             MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc),
1776                             txq->txd, txq->txd_dma);
1777         txq->txd = NULL;
1778 }
1779
1780 /* caller must hold priv->stream_lock when calling the stream functions */
1781 static struct mwl8k_ampdu_stream *
1782 mwl8k_add_stream(struct ieee80211_hw *hw, struct ieee80211_sta *sta, u8 tid)
1783 {
1784         struct mwl8k_ampdu_stream *stream;
1785         struct mwl8k_priv *priv = hw->priv;
1786         int i;
1787
1788         for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
1789                 stream = &priv->ampdu[i];
1790                 if (stream->state == AMPDU_NO_STREAM) {
1791                         stream->sta = sta;
1792                         stream->state = AMPDU_STREAM_NEW;
1793                         stream->tid = tid;
1794                         stream->idx = i;
1795                         wiphy_debug(hw->wiphy, "Added a new stream for %pM %d",
1796                                     sta->addr, tid);
1797                         return stream;
1798                 }
1799         }
1800         return NULL;
1801 }
1802
1803 static int
1804 mwl8k_start_stream(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream)
1805 {
1806         int ret;
1807
1808         /* if the stream has already been started, don't start it again */
1809         if (stream->state != AMPDU_STREAM_NEW)
1810                 return 0;
1811         ret = ieee80211_start_tx_ba_session(stream->sta, stream->tid, 0);
1812         if (ret)
1813                 wiphy_debug(hw->wiphy, "Failed to start stream for %pM %d: "
1814                             "%d\n", stream->sta->addr, stream->tid, ret);
1815         else
1816                 wiphy_debug(hw->wiphy, "Started stream for %pM %d\n",
1817                             stream->sta->addr, stream->tid);
1818         return ret;
1819 }
1820
1821 static void
1822 mwl8k_remove_stream(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream)
1823 {
1824         wiphy_debug(hw->wiphy, "Remove stream for %pM %d\n", stream->sta->addr,
1825                     stream->tid);
1826         memset(stream, 0, sizeof(*stream));
1827 }
1828
1829 static struct mwl8k_ampdu_stream *
1830 mwl8k_lookup_stream(struct ieee80211_hw *hw, u8 *addr, u8 tid)
1831 {
1832         struct mwl8k_priv *priv = hw->priv;
1833         int i;
1834
1835         for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
1836                 struct mwl8k_ampdu_stream *stream;
1837                 stream = &priv->ampdu[i];
1838                 if (stream->state == AMPDU_NO_STREAM)
1839                         continue;
1840                 if (!memcmp(stream->sta->addr, addr, ETH_ALEN) &&
1841                     stream->tid == tid)
1842                         return stream;
1843         }
1844         return NULL;
1845 }
1846
1847 #define MWL8K_AMPDU_PACKET_THRESHOLD 64
1848 static inline bool mwl8k_ampdu_allowed(struct ieee80211_sta *sta, u8 tid)
1849 {
1850         struct mwl8k_sta *sta_info = MWL8K_STA(sta);
1851         struct tx_traffic_info *tx_stats;
1852
1853         BUG_ON(tid >= MWL8K_MAX_TID);
1854         tx_stats = &sta_info->tx_stats[tid];
1855
1856         return sta_info->is_ampdu_allowed &&
1857                 tx_stats->pkts > MWL8K_AMPDU_PACKET_THRESHOLD;
1858 }
1859
1860 static inline void mwl8k_tx_count_packet(struct ieee80211_sta *sta, u8 tid)
1861 {
1862         struct mwl8k_sta *sta_info = MWL8K_STA(sta);
1863         struct tx_traffic_info *tx_stats;
1864
1865         BUG_ON(tid >= MWL8K_MAX_TID);
1866         tx_stats = &sta_info->tx_stats[tid];
1867
1868         if (tx_stats->start_time == 0)
1869                 tx_stats->start_time = jiffies;
1870
1871         /* reset the packet count after each second elapses.  If the number of
1872          * packets ever exceeds the ampdu_min_traffic threshold, we will allow
1873          * an ampdu stream to be started.
1874          */
1875         if (jiffies - tx_stats->start_time > HZ) {
1876                 tx_stats->pkts = 0;
1877                 tx_stats->start_time = 0;
1878         } else
1879                 tx_stats->pkts++;
1880 }
1881
1882 /* The hardware ampdu queues start from 5.
1883  * txpriorities for ampdu queues are
1884  * 5 6 7 0 1 2 3 4 ie., queue 5 is highest
1885  * and queue 3 is lowest (queue 4 is reserved)
1886  */
1887 #define BA_QUEUE                5
1888
1889 static void
1890 mwl8k_txq_xmit(struct ieee80211_hw *hw,
1891                int index,
1892                struct ieee80211_sta *sta,
1893                struct sk_buff *skb)
1894 {
1895         struct mwl8k_priv *priv = hw->priv;
1896         struct ieee80211_tx_info *tx_info;
1897         struct mwl8k_vif *mwl8k_vif;
1898         struct ieee80211_hdr *wh;
1899         struct mwl8k_tx_queue *txq;
1900         struct mwl8k_tx_desc *tx;
1901         dma_addr_t dma;
1902         u32 txstatus;
1903         u8 txdatarate;
1904         u16 qos;
1905         int txpriority;
1906         u8 tid = 0;
1907         struct mwl8k_ampdu_stream *stream = NULL;
1908         bool start_ba_session = false;
1909         bool mgmtframe = false;
1910         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
1911         bool eapol_frame = false;
1912
1913         wh = (struct ieee80211_hdr *)skb->data;
1914         if (ieee80211_is_data_qos(wh->frame_control))
1915                 qos = le16_to_cpu(*((__le16 *)ieee80211_get_qos_ctl(wh)));
1916         else
1917                 qos = 0;
1918
1919         if (skb->protocol == cpu_to_be16(ETH_P_PAE))
1920                 eapol_frame = true;
1921
1922         if (ieee80211_is_mgmt(wh->frame_control))
1923                 mgmtframe = true;
1924
1925         if (priv->ap_fw)
1926                 mwl8k_encapsulate_tx_frame(priv, skb);
1927         else
1928                 mwl8k_add_dma_header(priv, skb, 0, 0);
1929
1930         wh = &((struct mwl8k_dma_data *)skb->data)->wh;
1931
1932         tx_info = IEEE80211_SKB_CB(skb);
1933         mwl8k_vif = MWL8K_VIF(tx_info->control.vif);
1934
1935         if (tx_info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
1936                 wh->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1937                 wh->seq_ctrl |= cpu_to_le16(mwl8k_vif->seqno);
1938                 mwl8k_vif->seqno += 0x10;
1939         }
1940
1941         /* Setup firmware control bit fields for each frame type.  */
1942         txstatus = 0;
1943         txdatarate = 0;
1944         if (ieee80211_is_mgmt(wh->frame_control) ||
1945             ieee80211_is_ctl(wh->frame_control)) {
1946                 txdatarate = 0;
1947                 qos |= MWL8K_QOS_QLEN_UNSPEC | MWL8K_QOS_EOSP;
1948         } else if (ieee80211_is_data(wh->frame_control)) {
1949                 txdatarate = 1;
1950                 if (is_multicast_ether_addr(wh->addr1))
1951                         txstatus |= MWL8K_TXD_STATUS_MULTICAST_TX;
1952
1953                 qos &= ~MWL8K_QOS_ACK_POLICY_MASK;
1954                 if (tx_info->flags & IEEE80211_TX_CTL_AMPDU)
1955                         qos |= MWL8K_QOS_ACK_POLICY_BLOCKACK;
1956                 else
1957                         qos |= MWL8K_QOS_ACK_POLICY_NORMAL;
1958         }
1959
1960         /* Queue ADDBA request in the respective data queue.  While setting up
1961          * the ampdu stream, mac80211 queues further packets for that
1962          * particular ra/tid pair.  However, packets piled up in the hardware
1963          * for that ra/tid pair will still go out. ADDBA request and the
1964          * related data packets going out from different queues asynchronously
1965          * will cause a shift in the receiver window which might result in
1966          * ampdu packets getting dropped at the receiver after the stream has
1967          * been setup.
1968          */
1969         if (unlikely(ieee80211_is_action(wh->frame_control) &&
1970             mgmt->u.action.category == WLAN_CATEGORY_BACK &&
1971             mgmt->u.action.u.addba_req.action_code == WLAN_ACTION_ADDBA_REQ &&
1972             priv->ap_fw)) {
1973                 u16 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1974                 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1975                 index = mwl8k_tid_queue_mapping(tid);
1976         }
1977
1978         txpriority = index;
1979
1980         if (priv->ap_fw && sta && sta->ht_cap.ht_supported && !eapol_frame &&
1981             ieee80211_is_data_qos(wh->frame_control)) {
1982                 tid = qos & 0xf;
1983                 mwl8k_tx_count_packet(sta, tid);
1984                 spin_lock(&priv->stream_lock);
1985                 stream = mwl8k_lookup_stream(hw, sta->addr, tid);
1986                 if (stream != NULL) {
1987                         if (stream->state == AMPDU_STREAM_ACTIVE) {
1988                                 WARN_ON(!(qos & MWL8K_QOS_ACK_POLICY_BLOCKACK));
1989                                 txpriority = (BA_QUEUE + stream->idx) %
1990                                              TOTAL_HW_TX_QUEUES;
1991                                 if (stream->idx <= 1)
1992                                         index = stream->idx +
1993                                                 MWL8K_TX_WMM_QUEUES;
1994
1995                         } else if (stream->state == AMPDU_STREAM_NEW) {
1996                                 /* We get here if the driver sends us packets
1997                                  * after we've initiated a stream, but before
1998                                  * our ampdu_action routine has been called
1999                                  * with IEEE80211_AMPDU_TX_START to get the SSN
2000                                  * for the ADDBA request.  So this packet can
2001                                  * go out with no risk of sequence number
2002                                  * mismatch.  No special handling is required.
2003                                  */
2004                         } else {
2005                                 /* Drop packets that would go out after the
2006                                  * ADDBA request was sent but before the ADDBA
2007                                  * response is received.  If we don't do this,
2008                                  * the recipient would probably receive it
2009                                  * after the ADDBA request with SSN 0.  This
2010                                  * will cause the recipient's BA receive window
2011                                  * to shift, which would cause the subsequent
2012                                  * packets in the BA stream to be discarded.
2013                                  * mac80211 queues our packets for us in this
2014                                  * case, so this is really just a safety check.
2015                                  */
2016                                 wiphy_warn(hw->wiphy,
2017                                            "Cannot send packet while ADDBA "
2018                                            "dialog is underway.\n");
2019                                 spin_unlock(&priv->stream_lock);
2020                                 dev_kfree_skb(skb);
2021                                 return;
2022                         }
2023                 } else {
2024                         /* Defer calling mwl8k_start_stream so that the current
2025                          * skb can go out before the ADDBA request.  This
2026                          * prevents sequence number mismatch at the recepient
2027                          * as described above.
2028                          */
2029                         if (mwl8k_ampdu_allowed(sta, tid)) {
2030                                 stream = mwl8k_add_stream(hw, sta, tid);
2031                                 if (stream != NULL)
2032                                         start_ba_session = true;
2033                         }
2034                 }
2035                 spin_unlock(&priv->stream_lock);
2036         } else {
2037                 qos &= ~MWL8K_QOS_ACK_POLICY_MASK;
2038                 qos |= MWL8K_QOS_ACK_POLICY_NORMAL;
2039         }
2040
2041         dma = pci_map_single(priv->pdev, skb->data,
2042                                 skb->len, PCI_DMA_TODEVICE);
2043
2044         if (pci_dma_mapping_error(priv->pdev, dma)) {
2045                 wiphy_debug(hw->wiphy,
2046                             "failed to dma map skb, dropping TX frame.\n");
2047                 if (start_ba_session) {
2048                         spin_lock(&priv->stream_lock);
2049                         mwl8k_remove_stream(hw, stream);
2050                         spin_unlock(&priv->stream_lock);
2051                 }
2052                 dev_kfree_skb(skb);
2053                 return;
2054         }
2055
2056         spin_lock_bh(&priv->tx_lock);
2057
2058         txq = priv->txq + index;
2059
2060         /* Mgmt frames that go out frequently are probe
2061          * responses. Other mgmt frames got out relatively
2062          * infrequently. Hence reserve 2 buffers so that
2063          * other mgmt frames do not get dropped due to an
2064          * already queued probe response in one of the
2065          * reserved buffers.
2066          */
2067
2068         if (txq->len >= MWL8K_TX_DESCS - 2) {
2069                 if (!mgmtframe || txq->len == MWL8K_TX_DESCS) {
2070                         if (start_ba_session) {
2071                                 spin_lock(&priv->stream_lock);
2072                                 mwl8k_remove_stream(hw, stream);
2073                                 spin_unlock(&priv->stream_lock);
2074                         }
2075                         mwl8k_tx_start(priv);
2076                         spin_unlock_bh(&priv->tx_lock);
2077                         pci_unmap_single(priv->pdev, dma, skb->len,
2078                                          PCI_DMA_TODEVICE);
2079                         dev_kfree_skb(skb);
2080                         return;
2081                 }
2082         }
2083
2084         BUG_ON(txq->skb[txq->tail] != NULL);
2085         txq->skb[txq->tail] = skb;
2086
2087         tx = txq->txd + txq->tail;
2088         tx->data_rate = txdatarate;
2089         tx->tx_priority = txpriority;
2090         tx->qos_control = cpu_to_le16(qos);
2091         tx->pkt_phys_addr = cpu_to_le32(dma);
2092         tx->pkt_len = cpu_to_le16(skb->len);
2093         tx->rate_info = 0;
2094         if (!priv->ap_fw && sta != NULL)
2095                 tx->peer_id = MWL8K_STA(sta)->peer_id;
2096         else
2097                 tx->peer_id = 0;
2098
2099         if (priv->ap_fw && ieee80211_is_data(wh->frame_control) && !eapol_frame)
2100                 tx->timestamp = cpu_to_le32(ioread32(priv->regs +
2101                                                 MWL8K_HW_TIMER_REGISTER));
2102         else
2103                 tx->timestamp = 0;
2104
2105         wmb();
2106         tx->status = cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED | txstatus);
2107
2108         txq->len++;
2109         priv->pending_tx_pkts++;
2110
2111         txq->tail++;
2112         if (txq->tail == MWL8K_TX_DESCS)
2113                 txq->tail = 0;
2114
2115         mwl8k_tx_start(priv);
2116
2117         spin_unlock_bh(&priv->tx_lock);
2118
2119         /* Initiate the ampdu session here */
2120         if (start_ba_session) {
2121                 spin_lock(&priv->stream_lock);
2122                 if (mwl8k_start_stream(hw, stream))
2123                         mwl8k_remove_stream(hw, stream);
2124                 spin_unlock(&priv->stream_lock);
2125         }
2126 }
2127
2128
2129 /*
2130  * Firmware access.
2131  *
2132  * We have the following requirements for issuing firmware commands:
2133  * - Some commands require that the packet transmit path is idle when
2134  *   the command is issued.  (For simplicity, we'll just quiesce the
2135  *   transmit path for every command.)
2136  * - There are certain sequences of commands that need to be issued to
2137  *   the hardware sequentially, with no other intervening commands.
2138  *
2139  * This leads to an implementation of a "firmware lock" as a mutex that
2140  * can be taken recursively, and which is taken by both the low-level
2141  * command submission function (mwl8k_post_cmd) as well as any users of
2142  * that function that require issuing of an atomic sequence of commands,
2143  * and quiesces the transmit path whenever it's taken.
2144  */
2145 static int mwl8k_fw_lock(struct ieee80211_hw *hw)
2146 {
2147         struct mwl8k_priv *priv = hw->priv;
2148
2149         if (priv->fw_mutex_owner != current) {
2150                 int rc;
2151
2152                 mutex_lock(&priv->fw_mutex);
2153                 ieee80211_stop_queues(hw);
2154
2155                 rc = mwl8k_tx_wait_empty(hw);
2156                 if (rc) {
2157                         if (!priv->hw_restart_in_progress)
2158                                 ieee80211_wake_queues(hw);
2159
2160                         mutex_unlock(&priv->fw_mutex);
2161
2162                         return rc;
2163                 }
2164
2165                 priv->fw_mutex_owner = current;
2166         }
2167
2168         priv->fw_mutex_depth++;
2169
2170         return 0;
2171 }
2172
2173 static void mwl8k_fw_unlock(struct ieee80211_hw *hw)
2174 {
2175         struct mwl8k_priv *priv = hw->priv;
2176
2177         if (!--priv->fw_mutex_depth) {
2178                 if (!priv->hw_restart_in_progress)
2179                         ieee80211_wake_queues(hw);
2180
2181                 priv->fw_mutex_owner = NULL;
2182                 mutex_unlock(&priv->fw_mutex);
2183         }
2184 }
2185
2186 static void mwl8k_enable_bsses(struct ieee80211_hw *hw, bool enable,
2187                                u32 bitmap);
2188
2189 /*
2190  * Command processing.
2191  */
2192
2193 /* Timeout firmware commands after 10s */
2194 #define MWL8K_CMD_TIMEOUT_MS    10000
2195
2196 static int mwl8k_post_cmd(struct ieee80211_hw *hw, struct mwl8k_cmd_pkt *cmd)
2197 {
2198         DECLARE_COMPLETION_ONSTACK(cmd_wait);
2199         struct mwl8k_priv *priv = hw->priv;
2200         void __iomem *regs = priv->regs;
2201         dma_addr_t dma_addr;
2202         unsigned int dma_size;
2203         int rc;
2204         unsigned long timeout = 0;
2205         u8 buf[32];
2206         u32 bitmap = 0;
2207
2208         wiphy_dbg(hw->wiphy, "Posting %s [%d]\n",
2209                   mwl8k_cmd_name(cmd->code, buf, sizeof(buf)), cmd->macid);
2210
2211         /* Before posting firmware commands that could change the hardware
2212          * characteristics, make sure that all BSSes are stopped temporary.
2213          * Enable these stopped BSSes after completion of the commands
2214          */
2215
2216         rc = mwl8k_fw_lock(hw);
2217         if (rc)
2218                 return rc;
2219
2220         if (priv->ap_fw && priv->running_bsses) {
2221                 switch (le16_to_cpu(cmd->code)) {
2222                 case MWL8K_CMD_SET_RF_CHANNEL:
2223                 case MWL8K_CMD_RADIO_CONTROL:
2224                 case MWL8K_CMD_RF_TX_POWER:
2225                 case MWL8K_CMD_TX_POWER:
2226                 case MWL8K_CMD_RF_ANTENNA:
2227                 case MWL8K_CMD_RTS_THRESHOLD:
2228                 case MWL8K_CMD_MIMO_CONFIG:
2229                         bitmap = priv->running_bsses;
2230                         mwl8k_enable_bsses(hw, false, bitmap);
2231                         break;
2232                 }
2233         }
2234
2235         cmd->result = (__force __le16) 0xffff;
2236         dma_size = le16_to_cpu(cmd->length);
2237         dma_addr = pci_map_single(priv->pdev, cmd, dma_size,
2238                                   PCI_DMA_BIDIRECTIONAL);
2239         if (pci_dma_mapping_error(priv->pdev, dma_addr))
2240                 return -ENOMEM;
2241
2242         priv->hostcmd_wait = &cmd_wait;
2243         iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR);
2244         iowrite32(MWL8K_H2A_INT_DOORBELL,
2245                 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
2246         iowrite32(MWL8K_H2A_INT_DUMMY,
2247                 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
2248
2249         timeout = wait_for_completion_timeout(&cmd_wait,
2250                                 msecs_to_jiffies(MWL8K_CMD_TIMEOUT_MS));
2251
2252         priv->hostcmd_wait = NULL;
2253
2254
2255         pci_unmap_single(priv->pdev, dma_addr, dma_size,
2256                                         PCI_DMA_BIDIRECTIONAL);
2257
2258         if (!timeout) {
2259                 wiphy_err(hw->wiphy, "Command %s timeout after %u ms\n",
2260                           mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
2261                           MWL8K_CMD_TIMEOUT_MS);
2262                 rc = -ETIMEDOUT;
2263         } else {
2264                 int ms;
2265
2266                 ms = MWL8K_CMD_TIMEOUT_MS - jiffies_to_msecs(timeout);
2267
2268                 rc = cmd->result ? -EINVAL : 0;
2269                 if (rc)
2270                         wiphy_err(hw->wiphy, "Command %s error 0x%x\n",
2271                                   mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
2272                                   le16_to_cpu(cmd->result));
2273                 else if (ms > 2000)
2274                         wiphy_notice(hw->wiphy, "Command %s took %d ms\n",
2275                                      mwl8k_cmd_name(cmd->code,
2276                                                     buf, sizeof(buf)),
2277                                      ms);
2278         }
2279
2280         if (bitmap)
2281                 mwl8k_enable_bsses(hw, true, bitmap);
2282
2283         mwl8k_fw_unlock(hw);
2284
2285         return rc;
2286 }
2287
2288 static int mwl8k_post_pervif_cmd(struct ieee80211_hw *hw,
2289                                  struct ieee80211_vif *vif,
2290                                  struct mwl8k_cmd_pkt *cmd)
2291 {
2292         if (vif != NULL)
2293                 cmd->macid = MWL8K_VIF(vif)->macid;
2294         return mwl8k_post_cmd(hw, cmd);
2295 }
2296
2297 /*
2298  * Setup code shared between STA and AP firmware images.
2299  */
2300 static void mwl8k_setup_2ghz_band(struct ieee80211_hw *hw)
2301 {
2302         struct mwl8k_priv *priv = hw->priv;
2303
2304         BUILD_BUG_ON(sizeof(priv->channels_24) != sizeof(mwl8k_channels_24));
2305         memcpy(priv->channels_24, mwl8k_channels_24, sizeof(mwl8k_channels_24));
2306
2307         BUILD_BUG_ON(sizeof(priv->rates_24) != sizeof(mwl8k_rates_24));
2308         memcpy(priv->rates_24, mwl8k_rates_24, sizeof(mwl8k_rates_24));
2309
2310         priv->band_24.band = IEEE80211_BAND_2GHZ;
2311         priv->band_24.channels = priv->channels_24;
2312         priv->band_24.n_channels = ARRAY_SIZE(mwl8k_channels_24);
2313         priv->band_24.bitrates = priv->rates_24;
2314         priv->band_24.n_bitrates = ARRAY_SIZE(mwl8k_rates_24);
2315
2316         hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->band_24;
2317 }
2318
2319 static void mwl8k_setup_5ghz_band(struct ieee80211_hw *hw)
2320 {
2321         struct mwl8k_priv *priv = hw->priv;
2322
2323         BUILD_BUG_ON(sizeof(priv->channels_50) != sizeof(mwl8k_channels_50));
2324         memcpy(priv->channels_50, mwl8k_channels_50, sizeof(mwl8k_channels_50));
2325
2326         BUILD_BUG_ON(sizeof(priv->rates_50) != sizeof(mwl8k_rates_50));
2327         memcpy(priv->rates_50, mwl8k_rates_50, sizeof(mwl8k_rates_50));
2328
2329         priv->band_50.band = IEEE80211_BAND_5GHZ;
2330         priv->band_50.channels = priv->channels_50;
2331         priv->band_50.n_channels = ARRAY_SIZE(mwl8k_channels_50);
2332         priv->band_50.bitrates = priv->rates_50;
2333         priv->band_50.n_bitrates = ARRAY_SIZE(mwl8k_rates_50);
2334
2335         hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &priv->band_50;
2336 }
2337
2338 /*
2339  * CMD_GET_HW_SPEC (STA version).
2340  */
2341 struct mwl8k_cmd_get_hw_spec_sta {
2342         struct mwl8k_cmd_pkt header;
2343         __u8 hw_rev;
2344         __u8 host_interface;
2345         __le16 num_mcaddrs;
2346         __u8 perm_addr[ETH_ALEN];
2347         __le16 region_code;
2348         __le32 fw_rev;
2349         __le32 ps_cookie;
2350         __le32 caps;
2351         __u8 mcs_bitmap[16];
2352         __le32 rx_queue_ptr;
2353         __le32 num_tx_queues;
2354         __le32 tx_queue_ptrs[MWL8K_TX_WMM_QUEUES];
2355         __le32 caps2;
2356         __le32 num_tx_desc_per_queue;
2357         __le32 total_rxd;
2358 } __packed;
2359
2360 #define MWL8K_CAP_MAX_AMSDU             0x20000000
2361 #define MWL8K_CAP_GREENFIELD            0x08000000
2362 #define MWL8K_CAP_AMPDU                 0x04000000
2363 #define MWL8K_CAP_RX_STBC               0x01000000
2364 #define MWL8K_CAP_TX_STBC               0x00800000
2365 #define MWL8K_CAP_SHORTGI_40MHZ         0x00400000
2366 #define MWL8K_CAP_SHORTGI_20MHZ         0x00200000
2367 #define MWL8K_CAP_RX_ANTENNA_MASK       0x000e0000
2368 #define MWL8K_CAP_TX_ANTENNA_MASK       0x0001c000
2369 #define MWL8K_CAP_DELAY_BA              0x00003000
2370 #define MWL8K_CAP_MIMO                  0x00000200
2371 #define MWL8K_CAP_40MHZ                 0x00000100
2372 #define MWL8K_CAP_BAND_MASK             0x00000007
2373 #define MWL8K_CAP_5GHZ                  0x00000004
2374 #define MWL8K_CAP_2GHZ4                 0x00000001
2375
2376 static void
2377 mwl8k_set_ht_caps(struct ieee80211_hw *hw,
2378                   struct ieee80211_supported_band *band, u32 cap)
2379 {
2380         int rx_streams;
2381         int tx_streams;
2382
2383         band->ht_cap.ht_supported = 1;
2384
2385         if (cap & MWL8K_CAP_MAX_AMSDU)
2386                 band->ht_cap.cap |= IEEE80211_HT_CAP_MAX_AMSDU;
2387         if (cap & MWL8K_CAP_GREENFIELD)
2388                 band->ht_cap.cap |= IEEE80211_HT_CAP_GRN_FLD;
2389         if (cap & MWL8K_CAP_AMPDU) {
2390                 hw->flags |= IEEE80211_HW_AMPDU_AGGREGATION;
2391                 band->ht_cap.ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
2392                 band->ht_cap.ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE;
2393         }
2394         if (cap & MWL8K_CAP_RX_STBC)
2395                 band->ht_cap.cap |= IEEE80211_HT_CAP_RX_STBC;
2396         if (cap & MWL8K_CAP_TX_STBC)
2397                 band->ht_cap.cap |= IEEE80211_HT_CAP_TX_STBC;
2398         if (cap & MWL8K_CAP_SHORTGI_40MHZ)
2399                 band->ht_cap.cap |= IEEE80211_HT_CAP_SGI_40;
2400         if (cap & MWL8K_CAP_SHORTGI_20MHZ)
2401                 band->ht_cap.cap |= IEEE80211_HT_CAP_SGI_20;
2402         if (cap & MWL8K_CAP_DELAY_BA)
2403                 band->ht_cap.cap |= IEEE80211_HT_CAP_DELAY_BA;
2404         if (cap & MWL8K_CAP_40MHZ)
2405                 band->ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2406
2407         rx_streams = hweight32(cap & MWL8K_CAP_RX_ANTENNA_MASK);
2408         tx_streams = hweight32(cap & MWL8K_CAP_TX_ANTENNA_MASK);
2409
2410         band->ht_cap.mcs.rx_mask[0] = 0xff;
2411         if (rx_streams >= 2)
2412                 band->ht_cap.mcs.rx_mask[1] = 0xff;
2413         if (rx_streams >= 3)
2414                 band->ht_cap.mcs.rx_mask[2] = 0xff;
2415         band->ht_cap.mcs.rx_mask[4] = 0x01;
2416         band->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
2417
2418         if (rx_streams != tx_streams) {
2419                 band->ht_cap.mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
2420                 band->ht_cap.mcs.tx_params |= (tx_streams - 1) <<
2421                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
2422         }
2423 }
2424
2425 static void
2426 mwl8k_set_caps(struct ieee80211_hw *hw, u32 caps)
2427 {
2428         struct mwl8k_priv *priv = hw->priv;
2429
2430         if (priv->caps)
2431                 return;
2432
2433         if ((caps & MWL8K_CAP_2GHZ4) || !(caps & MWL8K_CAP_BAND_MASK)) {
2434                 mwl8k_setup_2ghz_band(hw);
2435                 if (caps & MWL8K_CAP_MIMO)
2436                         mwl8k_set_ht_caps(hw, &priv->band_24, caps);
2437         }
2438
2439         if (caps & MWL8K_CAP_5GHZ) {
2440                 mwl8k_setup_5ghz_band(hw);
2441                 if (caps & MWL8K_CAP_MIMO)
2442                         mwl8k_set_ht_caps(hw, &priv->band_50, caps);
2443         }
2444
2445         priv->caps = caps;
2446 }
2447
2448 static int mwl8k_cmd_get_hw_spec_sta(struct ieee80211_hw *hw)
2449 {
2450         struct mwl8k_priv *priv = hw->priv;
2451         struct mwl8k_cmd_get_hw_spec_sta *cmd;
2452         int rc;
2453         int i;
2454
2455         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2456         if (cmd == NULL)
2457                 return -ENOMEM;
2458
2459         cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_HW_SPEC);
2460         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2461
2462         memset(cmd->perm_addr, 0xff, sizeof(cmd->perm_addr));
2463         cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2464         cmd->rx_queue_ptr = cpu_to_le32(priv->rxq[0].rxd_dma);
2465         cmd->num_tx_queues = cpu_to_le32(mwl8k_tx_queues(priv));
2466         for (i = 0; i < mwl8k_tx_queues(priv); i++)
2467                 cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[i].txd_dma);
2468         cmd->num_tx_desc_per_queue = cpu_to_le32(MWL8K_TX_DESCS);
2469         cmd->total_rxd = cpu_to_le32(MWL8K_RX_DESCS);
2470
2471         rc = mwl8k_post_cmd(hw, &cmd->header);
2472
2473         if (!rc) {
2474                 SET_IEEE80211_PERM_ADDR(hw, cmd->perm_addr);
2475                 priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs);
2476                 priv->fw_rev = le32_to_cpu(cmd->fw_rev);
2477                 priv->hw_rev = cmd->hw_rev;
2478                 mwl8k_set_caps(hw, le32_to_cpu(cmd->caps));
2479                 priv->ap_macids_supported = 0x00000000;
2480                 priv->sta_macids_supported = 0x00000001;
2481         }
2482
2483         kfree(cmd);
2484         return rc;
2485 }
2486
2487 /*
2488  * CMD_GET_HW_SPEC (AP version).
2489  */
2490 struct mwl8k_cmd_get_hw_spec_ap {
2491         struct mwl8k_cmd_pkt header;
2492         __u8 hw_rev;
2493         __u8 host_interface;
2494         __le16 num_wcb;
2495         __le16 num_mcaddrs;
2496         __u8 perm_addr[ETH_ALEN];
2497         __le16 region_code;
2498         __le16 num_antenna;
2499         __le32 fw_rev;
2500         __le32 wcbbase0;
2501         __le32 rxwrptr;
2502         __le32 rxrdptr;
2503         __le32 ps_cookie;
2504         __le32 wcbbase1;
2505         __le32 wcbbase2;
2506         __le32 wcbbase3;
2507         __le32 fw_api_version;
2508         __le32 caps;
2509         __le32 num_of_ampdu_queues;
2510         __le32 wcbbase_ampdu[MWL8K_MAX_AMPDU_QUEUES];
2511 } __packed;
2512
2513 static int mwl8k_cmd_get_hw_spec_ap(struct ieee80211_hw *hw)
2514 {
2515         struct mwl8k_priv *priv = hw->priv;
2516         struct mwl8k_cmd_get_hw_spec_ap *cmd;
2517         int rc, i;
2518         u32 api_version;
2519
2520         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2521         if (cmd == NULL)
2522                 return -ENOMEM;
2523
2524         cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_HW_SPEC);
2525         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2526
2527         memset(cmd->perm_addr, 0xff, sizeof(cmd->perm_addr));
2528         cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2529
2530         rc = mwl8k_post_cmd(hw, &cmd->header);
2531
2532         if (!rc) {
2533                 int off;
2534
2535                 api_version = le32_to_cpu(cmd->fw_api_version);
2536                 if (priv->device_info->fw_api_ap != api_version) {
2537                         printk(KERN_ERR "%s: Unsupported fw API version for %s."
2538                                "  Expected %d got %d.\n", MWL8K_NAME,
2539                                priv->device_info->part_name,
2540                                priv->device_info->fw_api_ap,
2541                                api_version);
2542                         rc = -EINVAL;
2543                         goto done;
2544                 }
2545                 SET_IEEE80211_PERM_ADDR(hw, cmd->perm_addr);
2546                 priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs);
2547                 priv->fw_rev = le32_to_cpu(cmd->fw_rev);
2548                 priv->hw_rev = cmd->hw_rev;
2549                 mwl8k_set_caps(hw, le32_to_cpu(cmd->caps));
2550                 priv->ap_macids_supported = 0x000000ff;
2551                 priv->sta_macids_supported = 0x00000100;
2552                 priv->num_ampdu_queues = le32_to_cpu(cmd->num_of_ampdu_queues);
2553                 if (priv->num_ampdu_queues > MWL8K_MAX_AMPDU_QUEUES) {
2554                         wiphy_warn(hw->wiphy, "fw reported %d ampdu queues"
2555                                    " but we only support %d.\n",
2556                                    priv->num_ampdu_queues,
2557                                    MWL8K_MAX_AMPDU_QUEUES);
2558                         priv->num_ampdu_queues = MWL8K_MAX_AMPDU_QUEUES;
2559                 }
2560                 off = le32_to_cpu(cmd->rxwrptr) & 0xffff;
2561                 iowrite32(priv->rxq[0].rxd_dma, priv->sram + off);
2562
2563                 off = le32_to_cpu(cmd->rxrdptr) & 0xffff;
2564                 iowrite32(priv->rxq[0].rxd_dma, priv->sram + off);
2565
2566                 priv->txq_offset[0] = le32_to_cpu(cmd->wcbbase0) & 0xffff;
2567                 priv->txq_offset[1] = le32_to_cpu(cmd->wcbbase1) & 0xffff;
2568                 priv->txq_offset[2] = le32_to_cpu(cmd->wcbbase2) & 0xffff;
2569                 priv->txq_offset[3] = le32_to_cpu(cmd->wcbbase3) & 0xffff;
2570
2571                 for (i = 0; i < priv->num_ampdu_queues; i++)
2572                         priv->txq_offset[i + MWL8K_TX_WMM_QUEUES] =
2573                                 le32_to_cpu(cmd->wcbbase_ampdu[i]) & 0xffff;
2574         }
2575
2576 done:
2577         kfree(cmd);
2578         return rc;
2579 }
2580
2581 /*
2582  * CMD_SET_HW_SPEC.
2583  */
2584 struct mwl8k_cmd_set_hw_spec {
2585         struct mwl8k_cmd_pkt header;
2586         __u8 hw_rev;
2587         __u8 host_interface;
2588         __le16 num_mcaddrs;
2589         __u8 perm_addr[ETH_ALEN];
2590         __le16 region_code;
2591         __le32 fw_rev;
2592         __le32 ps_cookie;
2593         __le32 caps;
2594         __le32 rx_queue_ptr;
2595         __le32 num_tx_queues;
2596         __le32 tx_queue_ptrs[MWL8K_MAX_TX_QUEUES];
2597         __le32 flags;
2598         __le32 num_tx_desc_per_queue;
2599         __le32 total_rxd;
2600 } __packed;
2601
2602 /* If enabled, MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY will cause
2603  * packets to expire 500 ms after the timestamp in the tx descriptor.  That is,
2604  * the packets that are queued for more than 500ms, will be dropped in the
2605  * hardware. This helps minimizing the issues caused due to head-of-line
2606  * blocking where a slow client can hog the bandwidth and affect traffic to a
2607  * faster client.
2608  */
2609 #define MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY  0x00000400
2610 #define MWL8K_SET_HW_SPEC_FLAG_GENERATE_CCMP_HDR        0x00000200
2611 #define MWL8K_SET_HW_SPEC_FLAG_HOST_DECR_MGMT           0x00000080
2612 #define MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_PROBERESP       0x00000020
2613 #define MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_BEACON          0x00000010
2614
2615 static int mwl8k_cmd_set_hw_spec(struct ieee80211_hw *hw)
2616 {
2617         struct mwl8k_priv *priv = hw->priv;
2618         struct mwl8k_cmd_set_hw_spec *cmd;
2619         int rc;
2620         int i;
2621
2622         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2623         if (cmd == NULL)
2624                 return -ENOMEM;
2625
2626         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_HW_SPEC);
2627         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2628
2629         cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2630         cmd->rx_queue_ptr = cpu_to_le32(priv->rxq[0].rxd_dma);
2631         cmd->num_tx_queues = cpu_to_le32(mwl8k_tx_queues(priv));
2632
2633         /*
2634          * Mac80211 stack has Q0 as highest priority and Q3 as lowest in
2635          * that order. Firmware has Q3 as highest priority and Q0 as lowest
2636          * in that order. Map Q3 of mac80211 to Q0 of firmware so that the
2637          * priority is interpreted the right way in firmware.
2638          */
2639         for (i = 0; i < mwl8k_tx_queues(priv); i++) {
2640                 int j = mwl8k_tx_queues(priv) - 1 - i;
2641                 cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[j].txd_dma);
2642         }
2643
2644         cmd->flags = cpu_to_le32(MWL8K_SET_HW_SPEC_FLAG_HOST_DECR_MGMT |
2645                                  MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_PROBERESP |
2646                                  MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_BEACON |
2647                                  MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY |
2648                                  MWL8K_SET_HW_SPEC_FLAG_GENERATE_CCMP_HDR);
2649         cmd->num_tx_desc_per_queue = cpu_to_le32(MWL8K_TX_DESCS);
2650         cmd->total_rxd = cpu_to_le32(MWL8K_RX_DESCS);
2651
2652         rc = mwl8k_post_cmd(hw, &cmd->header);
2653         kfree(cmd);
2654
2655         return rc;
2656 }
2657
2658 /*
2659  * CMD_MAC_MULTICAST_ADR.
2660  */
2661 struct mwl8k_cmd_mac_multicast_adr {
2662         struct mwl8k_cmd_pkt header;
2663         __le16 action;
2664         __le16 numaddr;
2665         __u8 addr[0][ETH_ALEN];
2666 };
2667
2668 #define MWL8K_ENABLE_RX_DIRECTED        0x0001
2669 #define MWL8K_ENABLE_RX_MULTICAST       0x0002
2670 #define MWL8K_ENABLE_RX_ALL_MULTICAST   0x0004
2671 #define MWL8K_ENABLE_RX_BROADCAST       0x0008
2672
2673 static struct mwl8k_cmd_pkt *
2674 __mwl8k_cmd_mac_multicast_adr(struct ieee80211_hw *hw, int allmulti,
2675                               struct netdev_hw_addr_list *mc_list)
2676 {
2677         struct mwl8k_priv *priv = hw->priv;
2678         struct mwl8k_cmd_mac_multicast_adr *cmd;
2679         int size;
2680         int mc_count = 0;
2681
2682         if (mc_list)
2683                 mc_count = netdev_hw_addr_list_count(mc_list);
2684
2685         if (allmulti || mc_count > priv->num_mcaddrs) {
2686                 allmulti = 1;
2687                 mc_count = 0;
2688         }
2689
2690         size = sizeof(*cmd) + mc_count * ETH_ALEN;
2691
2692         cmd = kzalloc(size, GFP_ATOMIC);
2693         if (cmd == NULL)
2694                 return NULL;
2695
2696         cmd->header.code = cpu_to_le16(MWL8K_CMD_MAC_MULTICAST_ADR);
2697         cmd->header.length = cpu_to_le16(size);
2698         cmd->action = cpu_to_le16(MWL8K_ENABLE_RX_DIRECTED |
2699                                   MWL8K_ENABLE_RX_BROADCAST);
2700
2701         if (allmulti) {
2702                 cmd->action |= cpu_to_le16(MWL8K_ENABLE_RX_ALL_MULTICAST);
2703         } else if (mc_count) {
2704                 struct netdev_hw_addr *ha;
2705                 int i = 0;
2706
2707                 cmd->action |= cpu_to_le16(MWL8K_ENABLE_RX_MULTICAST);
2708                 cmd->numaddr = cpu_to_le16(mc_count);
2709                 netdev_hw_addr_list_for_each(ha, mc_list) {
2710                         memcpy(cmd->addr[i], ha->addr, ETH_ALEN);
2711                 }
2712         }
2713
2714         return &cmd->header;
2715 }
2716
2717 /*
2718  * CMD_GET_STAT.
2719  */
2720 struct mwl8k_cmd_get_stat {
2721         struct mwl8k_cmd_pkt header;
2722         __le32 stats[64];
2723 } __packed;
2724
2725 #define MWL8K_STAT_ACK_FAILURE  9
2726 #define MWL8K_STAT_RTS_FAILURE  12
2727 #define MWL8K_STAT_FCS_ERROR    24
2728 #define MWL8K_STAT_RTS_SUCCESS  11
2729
2730 static int mwl8k_cmd_get_stat(struct ieee80211_hw *hw,
2731                               struct ieee80211_low_level_stats *stats)
2732 {
2733         struct mwl8k_cmd_get_stat *cmd;
2734         int rc;
2735
2736         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2737         if (cmd == NULL)
2738                 return -ENOMEM;
2739
2740         cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_STAT);
2741         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2742
2743         rc = mwl8k_post_cmd(hw, &cmd->header);
2744         if (!rc) {
2745                 stats->dot11ACKFailureCount =
2746                         le32_to_cpu(cmd->stats[MWL8K_STAT_ACK_FAILURE]);
2747                 stats->dot11RTSFailureCount =
2748                         le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_FAILURE]);
2749                 stats->dot11FCSErrorCount =
2750                         le32_to_cpu(cmd->stats[MWL8K_STAT_FCS_ERROR]);
2751                 stats->dot11RTSSuccessCount =
2752                         le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_SUCCESS]);
2753         }
2754         kfree(cmd);
2755
2756         return rc;
2757 }
2758
2759 /*
2760  * CMD_RADIO_CONTROL.
2761  */
2762 struct mwl8k_cmd_radio_control {
2763         struct mwl8k_cmd_pkt header;
2764         __le16 action;
2765         __le16 control;
2766         __le16 radio_on;
2767 } __packed;
2768
2769 static int
2770 mwl8k_cmd_radio_control(struct ieee80211_hw *hw, bool enable, bool force)
2771 {
2772         struct mwl8k_priv *priv = hw->priv;
2773         struct mwl8k_cmd_radio_control *cmd;
2774         int rc;
2775
2776         if (enable == priv->radio_on && !force)
2777                 return 0;
2778
2779         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2780         if (cmd == NULL)
2781                 return -ENOMEM;
2782
2783         cmd->header.code = cpu_to_le16(MWL8K_CMD_RADIO_CONTROL);
2784         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2785         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
2786         cmd->control = cpu_to_le16(priv->radio_short_preamble ? 3 : 1);
2787         cmd->radio_on = cpu_to_le16(enable ? 0x0001 : 0x0000);
2788
2789         rc = mwl8k_post_cmd(hw, &cmd->header);
2790         kfree(cmd);
2791
2792         if (!rc)
2793                 priv->radio_on = enable;
2794
2795         return rc;
2796 }
2797
2798 static int mwl8k_cmd_radio_disable(struct ieee80211_hw *hw)
2799 {
2800         return mwl8k_cmd_radio_control(hw, 0, 0);
2801 }
2802
2803 static int mwl8k_cmd_radio_enable(struct ieee80211_hw *hw)
2804 {
2805         return mwl8k_cmd_radio_control(hw, 1, 0);
2806 }
2807
2808 static int
2809 mwl8k_set_radio_preamble(struct ieee80211_hw *hw, bool short_preamble)
2810 {
2811         struct mwl8k_priv *priv = hw->priv;
2812
2813         priv->radio_short_preamble = short_preamble;
2814
2815         return mwl8k_cmd_radio_control(hw, 1, 1);
2816 }
2817
2818 /*
2819  * CMD_RF_TX_POWER.
2820  */
2821 #define MWL8K_RF_TX_POWER_LEVEL_TOTAL   8
2822
2823 struct mwl8k_cmd_rf_tx_power {
2824         struct mwl8k_cmd_pkt header;
2825         __le16 action;
2826         __le16 support_level;
2827         __le16 current_level;
2828         __le16 reserved;
2829         __le16 power_level_list[MWL8K_RF_TX_POWER_LEVEL_TOTAL];
2830 } __packed;
2831
2832 static int mwl8k_cmd_rf_tx_power(struct ieee80211_hw *hw, int dBm)
2833 {
2834         struct mwl8k_cmd_rf_tx_power *cmd;
2835         int rc;
2836
2837         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2838         if (cmd == NULL)
2839                 return -ENOMEM;
2840
2841         cmd->header.code = cpu_to_le16(MWL8K_CMD_RF_TX_POWER);
2842         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2843         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
2844         cmd->support_level = cpu_to_le16(dBm);
2845
2846         rc = mwl8k_post_cmd(hw, &cmd->header);
2847         kfree(cmd);
2848
2849         return rc;
2850 }
2851
2852 /*
2853  * CMD_TX_POWER.
2854  */
2855 #define MWL8K_TX_POWER_LEVEL_TOTAL      12
2856
2857 struct mwl8k_cmd_tx_power {
2858         struct mwl8k_cmd_pkt header;
2859         __le16 action;
2860         __le16 band;
2861         __le16 channel;
2862         __le16 bw;
2863         __le16 sub_ch;
2864         __le16 power_level_list[MWL8K_TX_POWER_LEVEL_TOTAL];
2865 } __packed;
2866
2867 static int mwl8k_cmd_tx_power(struct ieee80211_hw *hw,
2868                                      struct ieee80211_conf *conf,
2869                                      unsigned short pwr)
2870 {
2871         struct ieee80211_channel *channel = conf->chandef.chan;
2872         enum nl80211_channel_type channel_type =
2873                 cfg80211_get_chandef_type(&conf->chandef);
2874         struct mwl8k_cmd_tx_power *cmd;
2875         int rc;
2876         int i;
2877
2878         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2879         if (cmd == NULL)
2880                 return -ENOMEM;
2881
2882         cmd->header.code = cpu_to_le16(MWL8K_CMD_TX_POWER);
2883         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2884         cmd->action = cpu_to_le16(MWL8K_CMD_SET_LIST);
2885
2886         if (channel->band == IEEE80211_BAND_2GHZ)
2887                 cmd->band = cpu_to_le16(0x1);
2888         else if (channel->band == IEEE80211_BAND_5GHZ)
2889                 cmd->band = cpu_to_le16(0x4);
2890
2891         cmd->channel = cpu_to_le16(channel->hw_value);
2892
2893         if (channel_type == NL80211_CHAN_NO_HT ||
2894             channel_type == NL80211_CHAN_HT20) {
2895                 cmd->bw = cpu_to_le16(0x2);
2896         } else {
2897                 cmd->bw = cpu_to_le16(0x4);
2898                 if (channel_type == NL80211_CHAN_HT40MINUS)
2899                         cmd->sub_ch = cpu_to_le16(0x3);
2900                 else if (channel_type == NL80211_CHAN_HT40PLUS)
2901                         cmd->sub_ch = cpu_to_le16(0x1);
2902         }
2903
2904         for (i = 0; i < MWL8K_TX_POWER_LEVEL_TOTAL; i++)
2905                 cmd->power_level_list[i] = cpu_to_le16(pwr);
2906
2907         rc = mwl8k_post_cmd(hw, &cmd->header);
2908         kfree(cmd);
2909
2910         return rc;
2911 }
2912
2913 /*
2914  * CMD_RF_ANTENNA.
2915  */
2916 struct mwl8k_cmd_rf_antenna {
2917         struct mwl8k_cmd_pkt header;
2918         __le16 antenna;
2919         __le16 mode;
2920 } __packed;
2921
2922 #define MWL8K_RF_ANTENNA_RX             1
2923 #define MWL8K_RF_ANTENNA_TX             2
2924
2925 static int
2926 mwl8k_cmd_rf_antenna(struct ieee80211_hw *hw, int antenna, int mask)
2927 {
2928         struct mwl8k_cmd_rf_antenna *cmd;
2929         int rc;
2930
2931         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2932         if (cmd == NULL)
2933                 return -ENOMEM;
2934
2935         cmd->header.code = cpu_to_le16(MWL8K_CMD_RF_ANTENNA);
2936         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2937         cmd->antenna = cpu_to_le16(antenna);
2938         cmd->mode = cpu_to_le16(mask);
2939
2940         rc = mwl8k_post_cmd(hw, &cmd->header);
2941         kfree(cmd);
2942
2943         return rc;
2944 }
2945
2946 /*
2947  * CMD_SET_BEACON.
2948  */
2949 struct mwl8k_cmd_set_beacon {
2950         struct mwl8k_cmd_pkt header;
2951         __le16 beacon_len;
2952         __u8 beacon[0];
2953 };
2954
2955 static int mwl8k_cmd_set_beacon(struct ieee80211_hw *hw,
2956                                 struct ieee80211_vif *vif, u8 *beacon, int len)
2957 {
2958         struct mwl8k_cmd_set_beacon *cmd;
2959         int rc;
2960
2961         cmd = kzalloc(sizeof(*cmd) + len, GFP_KERNEL);
2962         if (cmd == NULL)
2963                 return -ENOMEM;
2964
2965         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_BEACON);
2966         cmd->header.length = cpu_to_le16(sizeof(*cmd) + len);
2967         cmd->beacon_len = cpu_to_le16(len);
2968         memcpy(cmd->beacon, beacon, len);
2969
2970         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
2971         kfree(cmd);
2972
2973         return rc;
2974 }
2975
2976 /*
2977  * CMD_SET_PRE_SCAN.
2978  */
2979 struct mwl8k_cmd_set_pre_scan {
2980         struct mwl8k_cmd_pkt header;
2981 } __packed;
2982
2983 static int mwl8k_cmd_set_pre_scan(struct ieee80211_hw *hw)
2984 {
2985         struct mwl8k_cmd_set_pre_scan *cmd;
2986         int rc;
2987
2988         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2989         if (cmd == NULL)
2990                 return -ENOMEM;
2991
2992         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_PRE_SCAN);
2993         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2994
2995         rc = mwl8k_post_cmd(hw, &cmd->header);
2996         kfree(cmd);
2997
2998         return rc;
2999 }
3000
3001 /*
3002  * CMD_BBP_REG_ACCESS.
3003  */
3004 struct mwl8k_cmd_bbp_reg_access {
3005         struct mwl8k_cmd_pkt header;
3006         __le16 action;
3007         __le16 offset;
3008         u8 value;
3009         u8 rsrv[3];
3010 } __packed;
3011
3012 static int
3013 mwl8k_cmd_bbp_reg_access(struct ieee80211_hw *hw,
3014                          u16 action,
3015                          u16 offset,
3016                          u8 *value)
3017 {
3018         struct mwl8k_cmd_bbp_reg_access *cmd;
3019         int rc;
3020
3021         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3022         if (cmd == NULL)
3023                 return -ENOMEM;
3024
3025         cmd->header.code = cpu_to_le16(MWL8K_CMD_BBP_REG_ACCESS);
3026         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3027         cmd->action = cpu_to_le16(action);
3028         cmd->offset = cpu_to_le16(offset);
3029
3030         rc = mwl8k_post_cmd(hw, &cmd->header);
3031
3032         if (!rc)
3033                 *value = cmd->value;
3034         else
3035                 *value = 0;
3036
3037         kfree(cmd);
3038
3039         return rc;
3040 }
3041
3042 /*
3043  * CMD_SET_POST_SCAN.
3044  */
3045 struct mwl8k_cmd_set_post_scan {
3046         struct mwl8k_cmd_pkt header;
3047         __le32 isibss;
3048         __u8 bssid[ETH_ALEN];
3049 } __packed;
3050
3051 static int
3052 mwl8k_cmd_set_post_scan(struct ieee80211_hw *hw, const __u8 *mac)
3053 {
3054         struct mwl8k_cmd_set_post_scan *cmd;
3055         int rc;
3056
3057         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3058         if (cmd == NULL)
3059                 return -ENOMEM;
3060
3061         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_POST_SCAN);
3062         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3063         cmd->isibss = 0;
3064         memcpy(cmd->bssid, mac, ETH_ALEN);
3065
3066         rc = mwl8k_post_cmd(hw, &cmd->header);
3067         kfree(cmd);
3068
3069         return rc;
3070 }
3071
3072 static int freq_to_idx(struct mwl8k_priv *priv, int freq)
3073 {
3074         struct ieee80211_supported_band *sband;
3075         int band, ch, idx = 0;
3076
3077         for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) {
3078                 sband = priv->hw->wiphy->bands[band];
3079                 if (!sband)
3080                         continue;
3081
3082                 for (ch = 0; ch < sband->n_channels; ch++, idx++)
3083                         if (sband->channels[ch].center_freq == freq)
3084                                 goto exit;
3085         }
3086
3087 exit:
3088         return idx;
3089 }
3090
3091 static void mwl8k_update_survey(struct mwl8k_priv *priv,
3092                                 struct ieee80211_channel *channel)
3093 {
3094         u32 cca_cnt, rx_rdy;
3095         s8 nf = 0, idx;
3096         struct survey_info *survey;
3097
3098         idx = freq_to_idx(priv, priv->acs_chan->center_freq);
3099         if (idx >= MWL8K_NUM_CHANS) {
3100                 wiphy_err(priv->hw->wiphy, "Failed to update survey\n");
3101                 return;
3102         }
3103
3104         survey = &priv->survey[idx];
3105
3106         cca_cnt = ioread32(priv->regs + NOK_CCA_CNT_REG);
3107         cca_cnt /= 1000; /* uSecs to mSecs */
3108         survey->channel_time_busy = (u64) cca_cnt;
3109
3110         rx_rdy = ioread32(priv->regs + BBU_RXRDY_CNT_REG);
3111         rx_rdy /= 1000; /* uSecs to mSecs */
3112         survey->channel_time_rx = (u64) rx_rdy;
3113
3114         priv->channel_time = jiffies - priv->channel_time;
3115         survey->channel_time = jiffies_to_msecs(priv->channel_time);
3116
3117         survey->channel = channel;
3118
3119         mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &nf);
3120
3121         /* Make sure sign is negative else ACS  at hostapd fails */
3122         survey->noise = nf * -1;
3123
3124         survey->filled = SURVEY_INFO_NOISE_DBM |
3125                          SURVEY_INFO_CHANNEL_TIME |
3126                          SURVEY_INFO_CHANNEL_TIME_BUSY |
3127                          SURVEY_INFO_CHANNEL_TIME_RX;
3128 }
3129
3130 /*
3131  * CMD_SET_RF_CHANNEL.
3132  */
3133 struct mwl8k_cmd_set_rf_channel {
3134         struct mwl8k_cmd_pkt header;
3135         __le16 action;
3136         __u8 current_channel;
3137         __le32 channel_flags;
3138 } __packed;
3139
3140 static int mwl8k_cmd_set_rf_channel(struct ieee80211_hw *hw,
3141                                     struct ieee80211_conf *conf)
3142 {
3143         struct ieee80211_channel *channel = conf->chandef.chan;
3144         enum nl80211_channel_type channel_type =
3145                 cfg80211_get_chandef_type(&conf->chandef);
3146         struct mwl8k_cmd_set_rf_channel *cmd;
3147         struct mwl8k_priv *priv = hw->priv;
3148         int rc;
3149
3150         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3151         if (cmd == NULL)
3152                 return -ENOMEM;
3153
3154         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RF_CHANNEL);
3155         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3156         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3157         cmd->current_channel = channel->hw_value;
3158
3159         if (channel->band == IEEE80211_BAND_2GHZ)
3160                 cmd->channel_flags |= cpu_to_le32(0x00000001);
3161         else if (channel->band == IEEE80211_BAND_5GHZ)
3162                 cmd->channel_flags |= cpu_to_le32(0x00000004);
3163
3164         if (!priv->sw_scan_start) {
3165                 if (channel_type == NL80211_CHAN_NO_HT ||
3166                     channel_type == NL80211_CHAN_HT20)
3167                         cmd->channel_flags |= cpu_to_le32(0x00000080);
3168                 else if (channel_type == NL80211_CHAN_HT40MINUS)
3169                         cmd->channel_flags |= cpu_to_le32(0x000001900);
3170                 else if (channel_type == NL80211_CHAN_HT40PLUS)
3171                         cmd->channel_flags |= cpu_to_le32(0x000000900);
3172         } else {
3173                 cmd->channel_flags |= cpu_to_le32(0x00000080);
3174         }
3175
3176         if (priv->sw_scan_start) {
3177                 /* Store current channel stats
3178                  * before switching to newer one.
3179                  * This will be processed only for AP fw.
3180                  */
3181                 if (priv->channel_time != 0)
3182                         mwl8k_update_survey(priv, priv->acs_chan);
3183
3184                 priv->channel_time = jiffies;
3185                 priv->acs_chan =  channel;
3186         }
3187
3188         rc = mwl8k_post_cmd(hw, &cmd->header);
3189         kfree(cmd);
3190
3191         return rc;
3192 }
3193
3194 /*
3195  * CMD_SET_AID.
3196  */
3197 #define MWL8K_FRAME_PROT_DISABLED                       0x00
3198 #define MWL8K_FRAME_PROT_11G                            0x07
3199 #define MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY              0x02
3200 #define MWL8K_FRAME_PROT_11N_HT_ALL                     0x06
3201
3202 struct mwl8k_cmd_update_set_aid {
3203         struct  mwl8k_cmd_pkt header;
3204         __le16  aid;
3205
3206          /* AP's MAC address (BSSID) */
3207         __u8    bssid[ETH_ALEN];
3208         __le16  protection_mode;
3209         __u8    supp_rates[14];
3210 } __packed;
3211
3212 static void legacy_rate_mask_to_array(u8 *rates, u32 mask)
3213 {
3214         int i;
3215         int j;
3216
3217         /*
3218          * Clear nonstandard rate 4.
3219          */
3220         mask &= 0x1fef;
3221
3222         for (i = 0, j = 0; i < 13; i++) {
3223                 if (mask & (1 << i))
3224                         rates[j++] = mwl8k_rates_24[i].hw_value;
3225         }
3226 }
3227
3228 static int
3229 mwl8k_cmd_set_aid(struct ieee80211_hw *hw,
3230                   struct ieee80211_vif *vif, u32 legacy_rate_mask)
3231 {
3232         struct mwl8k_cmd_update_set_aid *cmd;
3233         u16 prot_mode;
3234         int rc;
3235
3236         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3237         if (cmd == NULL)
3238                 return -ENOMEM;
3239
3240         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_AID);
3241         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3242         cmd->aid = cpu_to_le16(vif->bss_conf.aid);
3243         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
3244
3245         if (vif->bss_conf.use_cts_prot) {
3246                 prot_mode = MWL8K_FRAME_PROT_11G;
3247         } else {
3248                 switch (vif->bss_conf.ht_operation_mode &
3249                         IEEE80211_HT_OP_MODE_PROTECTION) {
3250                 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
3251                         prot_mode = MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY;
3252                         break;
3253                 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
3254                         prot_mode = MWL8K_FRAME_PROT_11N_HT_ALL;
3255                         break;
3256                 default:
3257                         prot_mode = MWL8K_FRAME_PROT_DISABLED;
3258                         break;
3259                 }
3260         }
3261         cmd->protection_mode = cpu_to_le16(prot_mode);
3262
3263         legacy_rate_mask_to_array(cmd->supp_rates, legacy_rate_mask);
3264
3265         rc = mwl8k_post_cmd(hw, &cmd->header);
3266         kfree(cmd);
3267
3268         return rc;
3269 }
3270
3271 /*
3272  * CMD_SET_RATE.
3273  */
3274 struct mwl8k_cmd_set_rate {
3275         struct  mwl8k_cmd_pkt header;
3276         __u8    legacy_rates[14];
3277
3278         /* Bitmap for supported MCS codes.  */
3279         __u8    mcs_set[16];
3280         __u8    reserved[16];
3281 } __packed;
3282
3283 static int
3284 mwl8k_cmd_set_rate(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
3285                    u32 legacy_rate_mask, u8 *mcs_rates)
3286 {
3287         struct mwl8k_cmd_set_rate *cmd;
3288         int rc;
3289
3290         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3291         if (cmd == NULL)
3292                 return -ENOMEM;
3293
3294         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATE);
3295         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3296         legacy_rate_mask_to_array(cmd->legacy_rates, legacy_rate_mask);
3297         memcpy(cmd->mcs_set, mcs_rates, 16);
3298
3299         rc = mwl8k_post_cmd(hw, &cmd->header);
3300         kfree(cmd);
3301
3302         return rc;
3303 }
3304
3305 /*
3306  * CMD_FINALIZE_JOIN.
3307  */
3308 #define MWL8K_FJ_BEACON_MAXLEN  128
3309
3310 struct mwl8k_cmd_finalize_join {
3311         struct mwl8k_cmd_pkt header;
3312         __le32 sleep_interval;  /* Number of beacon periods to sleep */
3313         __u8 beacon_data[MWL8K_FJ_BEACON_MAXLEN];
3314 } __packed;
3315
3316 static int mwl8k_cmd_finalize_join(struct ieee80211_hw *hw, void *frame,
3317                                    int framelen, int dtim)
3318 {
3319         struct mwl8k_cmd_finalize_join *cmd;
3320         struct ieee80211_mgmt *payload = frame;
3321         int payload_len;
3322         int rc;
3323
3324         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3325         if (cmd == NULL)
3326                 return -ENOMEM;
3327
3328         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_FINALIZE_JOIN);
3329         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3330         cmd->sleep_interval = cpu_to_le32(dtim ? dtim : 1);
3331
3332         payload_len = framelen - ieee80211_hdrlen(payload->frame_control);
3333         if (payload_len < 0)
3334                 payload_len = 0;
3335         else if (payload_len > MWL8K_FJ_BEACON_MAXLEN)
3336                 payload_len = MWL8K_FJ_BEACON_MAXLEN;
3337
3338         memcpy(cmd->beacon_data, &payload->u.beacon, payload_len);
3339
3340         rc = mwl8k_post_cmd(hw, &cmd->header);
3341         kfree(cmd);
3342
3343         return rc;
3344 }
3345
3346 /*
3347  * CMD_SET_RTS_THRESHOLD.
3348  */
3349 struct mwl8k_cmd_set_rts_threshold {
3350         struct mwl8k_cmd_pkt header;
3351         __le16 action;
3352         __le16 threshold;
3353 } __packed;
3354
3355 static int
3356 mwl8k_cmd_set_rts_threshold(struct ieee80211_hw *hw, int rts_thresh)
3357 {
3358         struct mwl8k_cmd_set_rts_threshold *cmd;
3359         int rc;
3360
3361         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3362         if (cmd == NULL)
3363                 return -ENOMEM;
3364
3365         cmd->header.code = cpu_to_le16(MWL8K_CMD_RTS_THRESHOLD);
3366         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3367         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3368         cmd->threshold = cpu_to_le16(rts_thresh);
3369
3370         rc = mwl8k_post_cmd(hw, &cmd->header);
3371         kfree(cmd);
3372
3373         return rc;
3374 }
3375
3376 /*
3377  * CMD_SET_SLOT.
3378  */
3379 struct mwl8k_cmd_set_slot {
3380         struct mwl8k_cmd_pkt header;
3381         __le16 action;
3382         __u8 short_slot;
3383 } __packed;
3384
3385 static int mwl8k_cmd_set_slot(struct ieee80211_hw *hw, bool short_slot_time)
3386 {
3387         struct mwl8k_cmd_set_slot *cmd;
3388         int rc;
3389
3390         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3391         if (cmd == NULL)
3392                 return -ENOMEM;
3393
3394         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_SLOT);
3395         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3396         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3397         cmd->short_slot = short_slot_time;
3398
3399         rc = mwl8k_post_cmd(hw, &cmd->header);
3400         kfree(cmd);
3401
3402         return rc;
3403 }
3404
3405 /*
3406  * CMD_SET_EDCA_PARAMS.
3407  */
3408 struct mwl8k_cmd_set_edca_params {
3409         struct mwl8k_cmd_pkt header;
3410
3411         /* See MWL8K_SET_EDCA_XXX below */
3412         __le16 action;
3413
3414         /* TX opportunity in units of 32 us */
3415         __le16 txop;
3416
3417         union {
3418                 struct {
3419                         /* Log exponent of max contention period: 0...15 */
3420                         __le32 log_cw_max;
3421
3422                         /* Log exponent of min contention period: 0...15 */
3423                         __le32 log_cw_min;
3424
3425                         /* Adaptive interframe spacing in units of 32us */
3426                         __u8 aifs;
3427
3428                         /* TX queue to configure */
3429                         __u8 txq;
3430                 } ap;
3431                 struct {
3432                         /* Log exponent of max contention period: 0...15 */
3433                         __u8 log_cw_max;
3434
3435                         /* Log exponent of min contention period: 0...15 */
3436                         __u8 log_cw_min;
3437
3438                         /* Adaptive interframe spacing in units of 32us */
3439                         __u8 aifs;
3440
3441                         /* TX queue to configure */
3442                         __u8 txq;
3443                 } sta;
3444         };
3445 } __packed;
3446
3447 #define MWL8K_SET_EDCA_CW       0x01
3448 #define MWL8K_SET_EDCA_TXOP     0x02
3449 #define MWL8K_SET_EDCA_AIFS     0x04
3450
3451 #define MWL8K_SET_EDCA_ALL      (MWL8K_SET_EDCA_CW | \
3452                                  MWL8K_SET_EDCA_TXOP | \
3453                                  MWL8K_SET_EDCA_AIFS)
3454
3455 static int
3456 mwl8k_cmd_set_edca_params(struct ieee80211_hw *hw, __u8 qnum,
3457                           __u16 cw_min, __u16 cw_max,
3458                           __u8 aifs, __u16 txop)
3459 {
3460         struct mwl8k_priv *priv = hw->priv;
3461         struct mwl8k_cmd_set_edca_params *cmd;
3462         int rc;
3463
3464         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3465         if (cmd == NULL)
3466                 return -ENOMEM;
3467
3468         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_EDCA_PARAMS);
3469         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3470         cmd->action = cpu_to_le16(MWL8K_SET_EDCA_ALL);
3471         cmd->txop = cpu_to_le16(txop);
3472         if (priv->ap_fw) {
3473                 cmd->ap.log_cw_max = cpu_to_le32(ilog2(cw_max + 1));
3474                 cmd->ap.log_cw_min = cpu_to_le32(ilog2(cw_min + 1));
3475                 cmd->ap.aifs = aifs;
3476                 cmd->ap.txq = qnum;
3477         } else {
3478                 cmd->sta.log_cw_max = (u8)ilog2(cw_max + 1);
3479                 cmd->sta.log_cw_min = (u8)ilog2(cw_min + 1);
3480                 cmd->sta.aifs = aifs;
3481                 cmd->sta.txq = qnum;
3482         }
3483
3484         rc = mwl8k_post_cmd(hw, &cmd->header);
3485         kfree(cmd);
3486
3487         return rc;
3488 }
3489
3490 /*
3491  * CMD_SET_WMM_MODE.
3492  */
3493 struct mwl8k_cmd_set_wmm_mode {
3494         struct mwl8k_cmd_pkt header;
3495         __le16 action;
3496 } __packed;
3497
3498 static int mwl8k_cmd_set_wmm_mode(struct ieee80211_hw *hw, bool enable)
3499 {
3500         struct mwl8k_priv *priv = hw->priv;
3501         struct mwl8k_cmd_set_wmm_mode *cmd;
3502         int rc;
3503
3504         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3505         if (cmd == NULL)
3506                 return -ENOMEM;
3507
3508         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_WMM_MODE);
3509         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3510         cmd->action = cpu_to_le16(!!enable);
3511
3512         rc = mwl8k_post_cmd(hw, &cmd->header);
3513         kfree(cmd);
3514
3515         if (!rc)
3516                 priv->wmm_enabled = enable;
3517
3518         return rc;
3519 }
3520
3521 /*
3522  * CMD_MIMO_CONFIG.
3523  */
3524 struct mwl8k_cmd_mimo_config {
3525         struct mwl8k_cmd_pkt header;
3526         __le32 action;
3527         __u8 rx_antenna_map;
3528         __u8 tx_antenna_map;
3529 } __packed;
3530
3531 static int mwl8k_cmd_mimo_config(struct ieee80211_hw *hw, __u8 rx, __u8 tx)
3532 {
3533         struct mwl8k_cmd_mimo_config *cmd;
3534         int rc;
3535
3536         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3537         if (cmd == NULL)
3538                 return -ENOMEM;
3539
3540         cmd->header.code = cpu_to_le16(MWL8K_CMD_MIMO_CONFIG);
3541         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3542         cmd->action = cpu_to_le32((u32)MWL8K_CMD_SET);
3543         cmd->rx_antenna_map = rx;
3544         cmd->tx_antenna_map = tx;
3545
3546         rc = mwl8k_post_cmd(hw, &cmd->header);
3547         kfree(cmd);
3548
3549         return rc;
3550 }
3551
3552 /*
3553  * CMD_USE_FIXED_RATE (STA version).
3554  */
3555 struct mwl8k_cmd_use_fixed_rate_sta {
3556         struct mwl8k_cmd_pkt header;
3557         __le32 action;
3558         __le32 allow_rate_drop;
3559         __le32 num_rates;
3560         struct {
3561                 __le32 is_ht_rate;
3562                 __le32 enable_retry;
3563                 __le32 rate;
3564                 __le32 retry_count;
3565         } rate_entry[8];
3566         __le32 rate_type;
3567         __le32 reserved1;
3568         __le32 reserved2;
3569 } __packed;
3570
3571 #define MWL8K_USE_AUTO_RATE     0x0002
3572 #define MWL8K_UCAST_RATE        0
3573
3574 static int mwl8k_cmd_use_fixed_rate_sta(struct ieee80211_hw *hw)
3575 {
3576         struct mwl8k_cmd_use_fixed_rate_sta *cmd;
3577         int rc;
3578
3579         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3580         if (cmd == NULL)
3581                 return -ENOMEM;
3582
3583         cmd->header.code = cpu_to_le16(MWL8K_CMD_USE_FIXED_RATE);
3584         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3585         cmd->action = cpu_to_le32(MWL8K_USE_AUTO_RATE);
3586         cmd->rate_type = cpu_to_le32(MWL8K_UCAST_RATE);
3587
3588         rc = mwl8k_post_cmd(hw, &cmd->header);
3589         kfree(cmd);
3590
3591         return rc;
3592 }
3593
3594 /*
3595  * CMD_USE_FIXED_RATE (AP version).
3596  */
3597 struct mwl8k_cmd_use_fixed_rate_ap {
3598         struct mwl8k_cmd_pkt header;
3599         __le32 action;
3600         __le32 allow_rate_drop;
3601         __le32 num_rates;
3602         struct mwl8k_rate_entry_ap {
3603                 __le32 is_ht_rate;
3604                 __le32 enable_retry;
3605                 __le32 rate;
3606                 __le32 retry_count;
3607         } rate_entry[4];
3608         u8 multicast_rate;
3609         u8 multicast_rate_type;
3610         u8 management_rate;
3611 } __packed;
3612
3613 static int
3614 mwl8k_cmd_use_fixed_rate_ap(struct ieee80211_hw *hw, int mcast, int mgmt)
3615 {
3616         struct mwl8k_cmd_use_fixed_rate_ap *cmd;
3617         int rc;
3618
3619         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3620         if (cmd == NULL)
3621                 return -ENOMEM;
3622
3623         cmd->header.code = cpu_to_le16(MWL8K_CMD_USE_FIXED_RATE);
3624         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3625         cmd->action = cpu_to_le32(MWL8K_USE_AUTO_RATE);
3626         cmd->multicast_rate = mcast;
3627         cmd->management_rate = mgmt;
3628
3629         rc = mwl8k_post_cmd(hw, &cmd->header);
3630         kfree(cmd);
3631
3632         return rc;
3633 }
3634
3635 /*
3636  * CMD_ENABLE_SNIFFER.
3637  */
3638 struct mwl8k_cmd_enable_sniffer {
3639         struct mwl8k_cmd_pkt header;
3640         __le32 action;
3641 } __packed;
3642
3643 static int mwl8k_cmd_enable_sniffer(struct ieee80211_hw *hw, bool enable)
3644 {
3645         struct mwl8k_cmd_enable_sniffer *cmd;
3646         int rc;
3647
3648         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3649         if (cmd == NULL)
3650                 return -ENOMEM;
3651
3652         cmd->header.code = cpu_to_le16(MWL8K_CMD_ENABLE_SNIFFER);
3653         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3654         cmd->action = cpu_to_le32(!!enable);
3655
3656         rc = mwl8k_post_cmd(hw, &cmd->header);
3657         kfree(cmd);
3658
3659         return rc;
3660 }
3661
3662 struct mwl8k_cmd_update_mac_addr {
3663         struct mwl8k_cmd_pkt header;
3664         union {
3665                 struct {
3666                         __le16 mac_type;
3667                         __u8 mac_addr[ETH_ALEN];
3668                 } mbss;
3669                 __u8 mac_addr[ETH_ALEN];
3670         };
3671 } __packed;
3672
3673 #define MWL8K_MAC_TYPE_PRIMARY_CLIENT           0
3674 #define MWL8K_MAC_TYPE_SECONDARY_CLIENT         1
3675 #define MWL8K_MAC_TYPE_PRIMARY_AP               2
3676 #define MWL8K_MAC_TYPE_SECONDARY_AP             3
3677
3678 static int mwl8k_cmd_update_mac_addr(struct ieee80211_hw *hw,
3679                                   struct ieee80211_vif *vif, u8 *mac, bool set)
3680 {
3681         struct mwl8k_priv *priv = hw->priv;
3682         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
3683         struct mwl8k_cmd_update_mac_addr *cmd;
3684         int mac_type;
3685         int rc;
3686
3687         mac_type = MWL8K_MAC_TYPE_PRIMARY_AP;
3688         if (vif != NULL && vif->type == NL80211_IFTYPE_STATION) {
3689                 if (mwl8k_vif->macid + 1 == ffs(priv->sta_macids_supported))
3690                         if (priv->ap_fw)
3691                                 mac_type = MWL8K_MAC_TYPE_SECONDARY_CLIENT;
3692                         else
3693                                 mac_type = MWL8K_MAC_TYPE_PRIMARY_CLIENT;
3694                 else
3695                         mac_type = MWL8K_MAC_TYPE_SECONDARY_CLIENT;
3696         } else if (vif != NULL && vif->type == NL80211_IFTYPE_AP) {
3697                 if (mwl8k_vif->macid + 1 == ffs(priv->ap_macids_supported))
3698                         mac_type = MWL8K_MAC_TYPE_PRIMARY_AP;
3699                 else
3700                         mac_type = MWL8K_MAC_TYPE_SECONDARY_AP;
3701         }
3702
3703         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3704         if (cmd == NULL)
3705                 return -ENOMEM;
3706
3707         if (set)
3708                 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_MAC_ADDR);
3709         else
3710                 cmd->header.code = cpu_to_le16(MWL8K_CMD_DEL_MAC_ADDR);
3711
3712         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3713         if (priv->ap_fw) {
3714                 cmd->mbss.mac_type = cpu_to_le16(mac_type);
3715                 memcpy(cmd->mbss.mac_addr, mac, ETH_ALEN);
3716         } else {
3717                 memcpy(cmd->mac_addr, mac, ETH_ALEN);
3718         }
3719
3720         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3721         kfree(cmd);
3722
3723         return rc;
3724 }
3725
3726 /*
3727  * MWL8K_CMD_SET_MAC_ADDR.
3728  */
3729 static inline int mwl8k_cmd_set_mac_addr(struct ieee80211_hw *hw,
3730                                   struct ieee80211_vif *vif, u8 *mac)
3731 {
3732         return mwl8k_cmd_update_mac_addr(hw, vif, mac, true);
3733 }
3734
3735 /*
3736  * MWL8K_CMD_DEL_MAC_ADDR.
3737  */
3738 static inline int mwl8k_cmd_del_mac_addr(struct ieee80211_hw *hw,
3739                                   struct ieee80211_vif *vif, u8 *mac)
3740 {
3741         return mwl8k_cmd_update_mac_addr(hw, vif, mac, false);
3742 }
3743
3744 /*
3745  * CMD_SET_RATEADAPT_MODE.
3746  */
3747 struct mwl8k_cmd_set_rate_adapt_mode {
3748         struct mwl8k_cmd_pkt header;
3749         __le16 action;
3750         __le16 mode;
3751 } __packed;
3752
3753 static int mwl8k_cmd_set_rateadapt_mode(struct ieee80211_hw *hw, __u16 mode)
3754 {
3755         struct mwl8k_cmd_set_rate_adapt_mode *cmd;
3756         int rc;
3757
3758         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3759         if (cmd == NULL)
3760                 return -ENOMEM;
3761
3762         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATEADAPT_MODE);
3763         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3764         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3765         cmd->mode = cpu_to_le16(mode);
3766
3767         rc = mwl8k_post_cmd(hw, &cmd->header);
3768         kfree(cmd);
3769
3770         return rc;
3771 }
3772
3773 /*
3774  * CMD_GET_WATCHDOG_BITMAP.
3775  */
3776 struct mwl8k_cmd_get_watchdog_bitmap {
3777         struct mwl8k_cmd_pkt header;
3778         u8      bitmap;
3779 } __packed;
3780
3781 static int mwl8k_cmd_get_watchdog_bitmap(struct ieee80211_hw *hw, u8 *bitmap)
3782 {
3783         struct mwl8k_cmd_get_watchdog_bitmap *cmd;
3784         int rc;
3785
3786         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3787         if (cmd == NULL)
3788                 return -ENOMEM;
3789
3790         cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_WATCHDOG_BITMAP);
3791         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3792
3793         rc = mwl8k_post_cmd(hw, &cmd->header);
3794         if (!rc)
3795                 *bitmap = cmd->bitmap;
3796
3797         kfree(cmd);
3798
3799         return rc;
3800 }
3801
3802 #define MWL8K_WMM_QUEUE_NUMBER  3
3803
3804 static void mwl8k_destroy_ba(struct ieee80211_hw *hw,
3805                              u8 idx);
3806
3807 static void mwl8k_watchdog_ba_events(struct work_struct *work)
3808 {
3809         int rc;
3810         u8 bitmap = 0, stream_index;
3811         struct mwl8k_ampdu_stream *streams;
3812         struct mwl8k_priv *priv =
3813                 container_of(work, struct mwl8k_priv, watchdog_ba_handle);
3814         struct ieee80211_hw *hw = priv->hw;
3815         int i;
3816         u32 status = 0;
3817
3818         mwl8k_fw_lock(hw);
3819
3820         rc = mwl8k_cmd_get_watchdog_bitmap(priv->hw, &bitmap);
3821         if (rc)
3822                 goto done;
3823
3824         spin_lock(&priv->stream_lock);
3825
3826         /* the bitmap is the hw queue number.  Map it to the ampdu queue. */
3827         for (i = 0; i < TOTAL_HW_TX_QUEUES; i++) {
3828                 if (bitmap & (1 << i)) {
3829                         stream_index = (i + MWL8K_WMM_QUEUE_NUMBER) %
3830                                        TOTAL_HW_TX_QUEUES;
3831                         streams = &priv->ampdu[stream_index];
3832                         if (streams->state == AMPDU_STREAM_ACTIVE) {
3833                                 ieee80211_stop_tx_ba_session(streams->sta,
3834                                                              streams->tid);
3835                                 spin_unlock(&priv->stream_lock);
3836                                 mwl8k_destroy_ba(hw, stream_index);
3837                                 spin_lock(&priv->stream_lock);
3838                         }
3839                 }
3840         }
3841
3842         spin_unlock(&priv->stream_lock);
3843 done:
3844         atomic_dec(&priv->watchdog_event_pending);
3845         status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
3846         iowrite32((status | MWL8K_A2H_INT_BA_WATCHDOG),
3847                   priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
3848         mwl8k_fw_unlock(hw);
3849         return;
3850 }
3851
3852
3853 /*
3854  * CMD_BSS_START.
3855  */
3856 struct mwl8k_cmd_bss_start {
3857         struct mwl8k_cmd_pkt header;
3858         __le32 enable;
3859 } __packed;
3860
3861 static int mwl8k_cmd_bss_start(struct ieee80211_hw *hw,
3862                                struct ieee80211_vif *vif, int enable)
3863 {
3864         struct mwl8k_cmd_bss_start *cmd;
3865         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
3866         struct mwl8k_priv *priv = hw->priv;
3867         int rc;
3868
3869         if (enable && (priv->running_bsses & (1 << mwl8k_vif->macid)))
3870                 return 0;
3871
3872         if (!enable && !(priv->running_bsses & (1 << mwl8k_vif->macid)))
3873                 return 0;
3874
3875         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3876         if (cmd == NULL)
3877                 return -ENOMEM;
3878
3879         cmd->header.code = cpu_to_le16(MWL8K_CMD_BSS_START);
3880         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3881         cmd->enable = cpu_to_le32(enable);
3882
3883         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3884         kfree(cmd);
3885
3886         if (!rc) {
3887                 if (enable)
3888                         priv->running_bsses |= (1 << mwl8k_vif->macid);
3889                 else
3890                         priv->running_bsses &= ~(1 << mwl8k_vif->macid);
3891         }
3892         return rc;
3893 }
3894
3895 static void mwl8k_enable_bsses(struct ieee80211_hw *hw, bool enable, u32 bitmap)
3896 {
3897         struct mwl8k_priv *priv = hw->priv;
3898         struct mwl8k_vif *mwl8k_vif, *tmp_vif;
3899         struct ieee80211_vif *vif;
3900
3901         list_for_each_entry_safe(mwl8k_vif, tmp_vif, &priv->vif_list, list) {
3902                 vif = mwl8k_vif->vif;
3903
3904                 if (!(bitmap & (1 << mwl8k_vif->macid)))
3905                         continue;
3906
3907                 if (vif->type == NL80211_IFTYPE_AP)
3908                         mwl8k_cmd_bss_start(hw, vif, enable);
3909         }
3910 }
3911 /*
3912  * CMD_BASTREAM.
3913  */
3914
3915 /*
3916  * UPSTREAM is tx direction
3917  */
3918 #define BASTREAM_FLAG_DIRECTION_UPSTREAM        0x00
3919 #define BASTREAM_FLAG_IMMEDIATE_TYPE            0x01
3920
3921 enum ba_stream_action_type {
3922         MWL8K_BA_CREATE,
3923         MWL8K_BA_UPDATE,
3924         MWL8K_BA_DESTROY,
3925         MWL8K_BA_FLUSH,
3926         MWL8K_BA_CHECK,
3927 };
3928
3929
3930 struct mwl8k_create_ba_stream {
3931         __le32  flags;
3932         __le32  idle_thrs;
3933         __le32  bar_thrs;
3934         __le32  window_size;
3935         u8      peer_mac_addr[6];
3936         u8      dialog_token;
3937         u8      tid;
3938         u8      queue_id;
3939         u8      param_info;
3940         __le32  ba_context;
3941         u8      reset_seq_no_flag;
3942         __le16  curr_seq_no;
3943         u8      sta_src_mac_addr[6];
3944 } __packed;
3945
3946 struct mwl8k_destroy_ba_stream {
3947         __le32  flags;
3948         __le32  ba_context;
3949 } __packed;
3950
3951 struct mwl8k_cmd_bastream {
3952         struct mwl8k_cmd_pkt    header;
3953         __le32  action;
3954         union {
3955                 struct mwl8k_create_ba_stream   create_params;
3956                 struct mwl8k_destroy_ba_stream  destroy_params;
3957         };
3958 } __packed;
3959
3960 static int
3961 mwl8k_check_ba(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream,
3962                struct ieee80211_vif *vif)
3963 {
3964         struct mwl8k_cmd_bastream *cmd;
3965         int rc;
3966
3967         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3968         if (cmd == NULL)
3969                 return -ENOMEM;
3970
3971         cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
3972         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3973
3974         cmd->action = cpu_to_le32(MWL8K_BA_CHECK);
3975
3976         cmd->create_params.queue_id = stream->idx;
3977         memcpy(&cmd->create_params.peer_mac_addr[0], stream->sta->addr,
3978                ETH_ALEN);
3979         cmd->create_params.tid = stream->tid;
3980
3981         cmd->create_params.flags =
3982                 cpu_to_le32(BASTREAM_FLAG_IMMEDIATE_TYPE) |
3983                 cpu_to_le32(BASTREAM_FLAG_DIRECTION_UPSTREAM);
3984
3985         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3986
3987         kfree(cmd);
3988
3989         return rc;
3990 }
3991
3992 static int
3993 mwl8k_create_ba(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream,
3994                 u8 buf_size, struct ieee80211_vif *vif)
3995 {
3996         struct mwl8k_cmd_bastream *cmd;
3997         int rc;
3998
3999         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4000         if (cmd == NULL)
4001                 return -ENOMEM;
4002
4003
4004         cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
4005         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4006
4007         cmd->action = cpu_to_le32(MWL8K_BA_CREATE);
4008
4009         cmd->create_params.bar_thrs = cpu_to_le32((u32)buf_size);
4010         cmd->create_params.window_size = cpu_to_le32((u32)buf_size);
4011         cmd->create_params.queue_id = stream->idx;
4012
4013         memcpy(cmd->create_params.peer_mac_addr, stream->sta->addr, ETH_ALEN);
4014         cmd->create_params.tid = stream->tid;
4015         cmd->create_params.curr_seq_no = cpu_to_le16(0);
4016         cmd->create_params.reset_seq_no_flag = 1;
4017
4018         cmd->create_params.param_info =
4019                 (stream->sta->ht_cap.ampdu_factor &
4020                  IEEE80211_HT_AMPDU_PARM_FACTOR) |
4021                 ((stream->sta->ht_cap.ampdu_density << 2) &
4022                  IEEE80211_HT_AMPDU_PARM_DENSITY);
4023
4024         cmd->create_params.flags =
4025                 cpu_to_le32(BASTREAM_FLAG_IMMEDIATE_TYPE |
4026                                         BASTREAM_FLAG_DIRECTION_UPSTREAM);
4027
4028         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4029
4030         wiphy_debug(hw->wiphy, "Created a BA stream for %pM : tid %d\n",
4031                 stream->sta->addr, stream->tid);
4032         kfree(cmd);
4033
4034         return rc;
4035 }
4036
4037 static void mwl8k_destroy_ba(struct ieee80211_hw *hw,
4038                              u8 idx)
4039 {
4040         struct mwl8k_cmd_bastream *cmd;
4041
4042         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4043         if (cmd == NULL)
4044                 return;
4045
4046         cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
4047         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4048         cmd->action = cpu_to_le32(MWL8K_BA_DESTROY);
4049
4050         cmd->destroy_params.ba_context = cpu_to_le32(idx);
4051         mwl8k_post_cmd(hw, &cmd->header);
4052
4053         wiphy_debug(hw->wiphy, "Deleted BA stream index %d\n", idx);
4054
4055         kfree(cmd);
4056 }
4057
4058 /*
4059  * CMD_SET_NEW_STN.
4060  */
4061 struct mwl8k_cmd_set_new_stn {
4062         struct mwl8k_cmd_pkt header;
4063         __le16 aid;
4064         __u8 mac_addr[6];
4065         __le16 stn_id;
4066         __le16 action;
4067         __le16 rsvd;
4068         __le32 legacy_rates;
4069         __u8 ht_rates[4];
4070         __le16 cap_info;
4071         __le16 ht_capabilities_info;
4072         __u8 mac_ht_param_info;
4073         __u8 rev;
4074         __u8 control_channel;
4075         __u8 add_channel;
4076         __le16 op_mode;
4077         __le16 stbc;
4078         __u8 add_qos_info;
4079         __u8 is_qos_sta;
4080         __le32 fw_sta_ptr;
4081 } __packed;
4082
4083 #define MWL8K_STA_ACTION_ADD            0
4084 #define MWL8K_STA_ACTION_REMOVE         2
4085
4086 static int mwl8k_cmd_set_new_stn_add(struct ieee80211_hw *hw,
4087                                      struct ieee80211_vif *vif,
4088                                      struct ieee80211_sta *sta)
4089 {
4090         struct mwl8k_cmd_set_new_stn *cmd;
4091         u32 rates;
4092         int rc;
4093
4094         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4095         if (cmd == NULL)
4096                 return -ENOMEM;
4097
4098         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4099         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4100         cmd->aid = cpu_to_le16(sta->aid);
4101         memcpy(cmd->mac_addr, sta->addr, ETH_ALEN);
4102         cmd->stn_id = cpu_to_le16(sta->aid);
4103         cmd->action = cpu_to_le16(MWL8K_STA_ACTION_ADD);
4104         if (hw->conf.chandef.chan->band == IEEE80211_BAND_2GHZ)
4105                 rates = sta->supp_rates[IEEE80211_BAND_2GHZ];
4106         else
4107                 rates = sta->supp_rates[IEEE80211_BAND_5GHZ] << 5;
4108         cmd->legacy_rates = cpu_to_le32(rates);
4109         if (sta->ht_cap.ht_supported) {
4110                 cmd->ht_rates[0] = sta->ht_cap.mcs.rx_mask[0];
4111                 cmd->ht_rates[1] = sta->ht_cap.mcs.rx_mask[1];
4112                 cmd->ht_rates[2] = sta->ht_cap.mcs.rx_mask[2];
4113                 cmd->ht_rates[3] = sta->ht_cap.mcs.rx_mask[3];
4114                 cmd->ht_capabilities_info = cpu_to_le16(sta->ht_cap.cap);
4115                 cmd->mac_ht_param_info = (sta->ht_cap.ampdu_factor & 3) |
4116                         ((sta->ht_cap.ampdu_density & 7) << 2);
4117                 cmd->is_qos_sta = 1;
4118         }
4119
4120         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4121         kfree(cmd);
4122
4123         return rc;
4124 }
4125
4126 static int mwl8k_cmd_set_new_stn_add_self(struct ieee80211_hw *hw,
4127                                           struct ieee80211_vif *vif)
4128 {
4129         struct mwl8k_cmd_set_new_stn *cmd;
4130         int rc;
4131
4132         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4133         if (cmd == NULL)
4134                 return -ENOMEM;
4135
4136         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4137         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4138         memcpy(cmd->mac_addr, vif->addr, ETH_ALEN);
4139
4140         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4141         kfree(cmd);
4142
4143         return rc;
4144 }
4145
4146 static int mwl8k_cmd_set_new_stn_del(struct ieee80211_hw *hw,
4147                                      struct ieee80211_vif *vif, u8 *addr)
4148 {
4149         struct mwl8k_cmd_set_new_stn *cmd;
4150         struct mwl8k_priv *priv = hw->priv;
4151         int rc, i;
4152         u8 idx;
4153
4154         spin_lock(&priv->stream_lock);
4155         /* Destroy any active ampdu streams for this sta */
4156         for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
4157                 struct mwl8k_ampdu_stream *s;
4158                 s = &priv->ampdu[i];
4159                 if (s->state != AMPDU_NO_STREAM) {
4160                         if (memcmp(s->sta->addr, addr, ETH_ALEN) == 0) {
4161                                 if (s->state == AMPDU_STREAM_ACTIVE) {
4162                                         idx = s->idx;
4163                                         spin_unlock(&priv->stream_lock);
4164                                         mwl8k_destroy_ba(hw, idx);
4165                                         spin_lock(&priv->stream_lock);
4166                                 } else if (s->state == AMPDU_STREAM_NEW) {
4167                                         mwl8k_remove_stream(hw, s);
4168                                 }
4169                         }
4170                 }
4171         }
4172
4173         spin_unlock(&priv->stream_lock);
4174
4175         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4176         if (cmd == NULL)
4177                 return -ENOMEM;
4178
4179         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4180         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4181         memcpy(cmd->mac_addr, addr, ETH_ALEN);
4182         cmd->action = cpu_to_le16(MWL8K_STA_ACTION_REMOVE);
4183
4184         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4185         kfree(cmd);
4186
4187         return rc;
4188 }
4189
4190 /*
4191  * CMD_UPDATE_ENCRYPTION.
4192  */
4193
4194 #define MAX_ENCR_KEY_LENGTH     16
4195 #define MIC_KEY_LENGTH          8
4196
4197 struct mwl8k_cmd_update_encryption {
4198         struct mwl8k_cmd_pkt header;
4199
4200         __le32 action;
4201         __le32 reserved;
4202         __u8 mac_addr[6];
4203         __u8 encr_type;
4204
4205 } __packed;
4206
4207 struct mwl8k_cmd_set_key {
4208         struct mwl8k_cmd_pkt header;
4209
4210         __le32 action;
4211         __le32 reserved;
4212         __le16 length;
4213         __le16 key_type_id;
4214         __le32 key_info;
4215         __le32 key_id;
4216         __le16 key_len;
4217         __u8 key_material[MAX_ENCR_KEY_LENGTH];
4218         __u8 tkip_tx_mic_key[MIC_KEY_LENGTH];
4219         __u8 tkip_rx_mic_key[MIC_KEY_LENGTH];
4220         __le16 tkip_rsc_low;
4221         __le32 tkip_rsc_high;
4222         __le16 tkip_tsc_low;
4223         __le32 tkip_tsc_high;
4224         __u8 mac_addr[6];
4225 } __packed;
4226
4227 enum {
4228         MWL8K_ENCR_ENABLE,
4229         MWL8K_ENCR_SET_KEY,
4230         MWL8K_ENCR_REMOVE_KEY,
4231         MWL8K_ENCR_SET_GROUP_KEY,
4232 };
4233
4234 #define MWL8K_UPDATE_ENCRYPTION_TYPE_WEP        0
4235 #define MWL8K_UPDATE_ENCRYPTION_TYPE_DISABLE    1
4236 #define MWL8K_UPDATE_ENCRYPTION_TYPE_TKIP       4
4237 #define MWL8K_UPDATE_ENCRYPTION_TYPE_MIXED      7
4238 #define MWL8K_UPDATE_ENCRYPTION_TYPE_AES        8
4239
4240 enum {
4241         MWL8K_ALG_WEP,
4242         MWL8K_ALG_TKIP,
4243         MWL8K_ALG_CCMP,
4244 };
4245
4246 #define MWL8K_KEY_FLAG_TXGROUPKEY       0x00000004
4247 #define MWL8K_KEY_FLAG_PAIRWISE         0x00000008
4248 #define MWL8K_KEY_FLAG_TSC_VALID        0x00000040
4249 #define MWL8K_KEY_FLAG_WEP_TXKEY        0x01000000
4250 #define MWL8K_KEY_FLAG_MICKEY_VALID     0x02000000
4251
4252 static int mwl8k_cmd_update_encryption_enable(struct ieee80211_hw *hw,
4253                                               struct ieee80211_vif *vif,
4254                                               u8 *addr,
4255                                               u8 encr_type)
4256 {
4257         struct mwl8k_cmd_update_encryption *cmd;
4258         int rc;
4259
4260         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4261         if (cmd == NULL)
4262                 return -ENOMEM;
4263
4264         cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_ENCRYPTION);
4265         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4266         cmd->action = cpu_to_le32(MWL8K_ENCR_ENABLE);
4267         memcpy(cmd->mac_addr, addr, ETH_ALEN);
4268         cmd->encr_type = encr_type;
4269
4270         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4271         kfree(cmd);
4272
4273         return rc;
4274 }
4275
4276 static int mwl8k_encryption_set_cmd_info(struct mwl8k_cmd_set_key *cmd,
4277                                                 u8 *addr,
4278                                                 struct ieee80211_key_conf *key)
4279 {
4280         cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_ENCRYPTION);
4281         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4282         cmd->length = cpu_to_le16(sizeof(*cmd) -
4283                                 offsetof(struct mwl8k_cmd_set_key, length));
4284         cmd->key_id = cpu_to_le32(key->keyidx);
4285         cmd->key_len = cpu_to_le16(key->keylen);
4286         memcpy(cmd->mac_addr, addr, ETH_ALEN);
4287
4288         switch (key->cipher) {
4289         case WLAN_CIPHER_SUITE_WEP40:
4290         case WLAN_CIPHER_SUITE_WEP104:
4291                 cmd->key_type_id = cpu_to_le16(MWL8K_ALG_WEP);
4292                 if (key->keyidx == 0)
4293                         cmd->key_info = cpu_to_le32(MWL8K_KEY_FLAG_WEP_TXKEY);
4294
4295                 break;
4296         case WLAN_CIPHER_SUITE_TKIP:
4297                 cmd->key_type_id = cpu_to_le16(MWL8K_ALG_TKIP);
4298                 cmd->key_info = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4299                         ? cpu_to_le32(MWL8K_KEY_FLAG_PAIRWISE)
4300                         : cpu_to_le32(MWL8K_KEY_FLAG_TXGROUPKEY);
4301                 cmd->key_info |= cpu_to_le32(MWL8K_KEY_FLAG_MICKEY_VALID
4302                                                 | MWL8K_KEY_FLAG_TSC_VALID);
4303                 break;
4304         case WLAN_CIPHER_SUITE_CCMP:
4305                 cmd->key_type_id = cpu_to_le16(MWL8K_ALG_CCMP);
4306                 cmd->key_info = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4307                         ? cpu_to_le32(MWL8K_KEY_FLAG_PAIRWISE)
4308                         : cpu_to_le32(MWL8K_KEY_FLAG_TXGROUPKEY);
4309                 break;
4310         default:
4311                 return -ENOTSUPP;
4312         }
4313
4314         return 0;
4315 }
4316
4317 static int mwl8k_cmd_encryption_set_key(struct ieee80211_hw *hw,
4318                                                 struct ieee80211_vif *vif,
4319                                                 u8 *addr,
4320                                                 struct ieee80211_key_conf *key)
4321 {
4322         struct mwl8k_cmd_set_key *cmd;
4323         int rc;
4324         int keymlen;
4325         u32 action;
4326         u8 idx;
4327         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4328
4329         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4330         if (cmd == NULL)
4331                 return -ENOMEM;
4332
4333         rc = mwl8k_encryption_set_cmd_info(cmd, addr, key);
4334         if (rc < 0)
4335                 goto done;
4336
4337         idx = key->keyidx;
4338
4339         if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4340                 action = MWL8K_ENCR_SET_KEY;
4341         else
4342                 action = MWL8K_ENCR_SET_GROUP_KEY;
4343
4344         switch (key->cipher) {
4345         case WLAN_CIPHER_SUITE_WEP40:
4346         case WLAN_CIPHER_SUITE_WEP104:
4347                 if (!mwl8k_vif->wep_key_conf[idx].enabled) {
4348                         memcpy(mwl8k_vif->wep_key_conf[idx].key, key,
4349                                                 sizeof(*key) + key->keylen);
4350                         mwl8k_vif->wep_key_conf[idx].enabled = 1;
4351                 }
4352
4353                 keymlen = key->keylen;
4354                 action = MWL8K_ENCR_SET_KEY;
4355                 break;
4356         case WLAN_CIPHER_SUITE_TKIP:
4357                 keymlen = MAX_ENCR_KEY_LENGTH + 2 * MIC_KEY_LENGTH;
4358                 break;
4359         case WLAN_CIPHER_SUITE_CCMP:
4360                 keymlen = key->keylen;
4361                 break;
4362         default:
4363                 rc = -ENOTSUPP;
4364                 goto done;
4365         }
4366
4367         memcpy(cmd->key_material, key->key, keymlen);
4368         cmd->action = cpu_to_le32(action);
4369
4370         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4371 done:
4372         kfree(cmd);
4373
4374         return rc;
4375 }
4376
4377 static int mwl8k_cmd_encryption_remove_key(struct ieee80211_hw *hw,
4378                                                 struct ieee80211_vif *vif,
4379                                                 u8 *addr,
4380                                                 struct ieee80211_key_conf *key)
4381 {
4382         struct mwl8k_cmd_set_key *cmd;
4383         int rc;
4384         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4385
4386         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4387         if (cmd == NULL)
4388                 return -ENOMEM;
4389
4390         rc = mwl8k_encryption_set_cmd_info(cmd, addr, key);
4391         if (rc < 0)
4392                 goto done;
4393
4394         if (key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
4395                         key->cipher == WLAN_CIPHER_SUITE_WEP104)
4396                 mwl8k_vif->wep_key_conf[key->keyidx].enabled = 0;
4397
4398         cmd->action = cpu_to_le32(MWL8K_ENCR_REMOVE_KEY);
4399
4400         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4401 done:
4402         kfree(cmd);
4403
4404         return rc;
4405 }
4406
4407 static int mwl8k_set_key(struct ieee80211_hw *hw,
4408                          enum set_key_cmd cmd_param,
4409                          struct ieee80211_vif *vif,
4410                          struct ieee80211_sta *sta,
4411                          struct ieee80211_key_conf *key)
4412 {
4413         int rc = 0;
4414         u8 encr_type;
4415         u8 *addr;
4416         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4417         struct mwl8k_priv *priv = hw->priv;
4418
4419         if (vif->type == NL80211_IFTYPE_STATION && !priv->ap_fw)
4420                 return -EOPNOTSUPP;
4421
4422         if (sta == NULL)
4423                 addr = vif->addr;
4424         else
4425                 addr = sta->addr;
4426
4427         if (cmd_param == SET_KEY) {
4428                 rc = mwl8k_cmd_encryption_set_key(hw, vif, addr, key);
4429                 if (rc)
4430                         goto out;
4431
4432                 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40)
4433                                 || (key->cipher == WLAN_CIPHER_SUITE_WEP104))
4434                         encr_type = MWL8K_UPDATE_ENCRYPTION_TYPE_WEP;
4435                 else
4436                         encr_type = MWL8K_UPDATE_ENCRYPTION_TYPE_MIXED;
4437
4438                 rc = mwl8k_cmd_update_encryption_enable(hw, vif, addr,
4439                                                                 encr_type);
4440                 if (rc)
4441                         goto out;
4442
4443                 mwl8k_vif->is_hw_crypto_enabled = true;
4444
4445         } else {
4446                 rc = mwl8k_cmd_encryption_remove_key(hw, vif, addr, key);
4447
4448                 if (rc)
4449                         goto out;
4450         }
4451 out:
4452         return rc;
4453 }
4454
4455 /*
4456  * CMD_UPDATE_STADB.
4457  */
4458 struct ewc_ht_info {
4459         __le16  control1;
4460         __le16  control2;
4461         __le16  control3;
4462 } __packed;
4463
4464 struct peer_capability_info {
4465         /* Peer type - AP vs. STA.  */
4466         __u8    peer_type;
4467
4468         /* Basic 802.11 capabilities from assoc resp.  */
4469         __le16  basic_caps;
4470
4471         /* Set if peer supports 802.11n high throughput (HT).  */
4472         __u8    ht_support;
4473
4474         /* Valid if HT is supported.  */
4475         __le16  ht_caps;
4476         __u8    extended_ht_caps;
4477         struct ewc_ht_info      ewc_info;
4478
4479         /* Legacy rate table. Intersection of our rates and peer rates.  */
4480         __u8    legacy_rates[12];
4481
4482         /* HT rate table. Intersection of our rates and peer rates.  */
4483         __u8    ht_rates[16];
4484         __u8    pad[16];
4485
4486         /* If set, interoperability mode, no proprietary extensions.  */
4487         __u8    interop;
4488         __u8    pad2;
4489         __u8    station_id;
4490         __le16  amsdu_enabled;
4491 } __packed;
4492
4493 struct mwl8k_cmd_update_stadb {
4494         struct mwl8k_cmd_pkt header;
4495
4496         /* See STADB_ACTION_TYPE */
4497         __le32  action;
4498
4499         /* Peer MAC address */
4500         __u8    peer_addr[ETH_ALEN];
4501
4502         __le32  reserved;
4503
4504         /* Peer info - valid during add/update.  */
4505         struct peer_capability_info     peer_info;
4506 } __packed;
4507
4508 #define MWL8K_STA_DB_MODIFY_ENTRY       1
4509 #define MWL8K_STA_DB_DEL_ENTRY          2
4510
4511 /* Peer Entry flags - used to define the type of the peer node */
4512 #define MWL8K_PEER_TYPE_ACCESSPOINT     2
4513
4514 static int mwl8k_cmd_update_stadb_add(struct ieee80211_hw *hw,
4515                                       struct ieee80211_vif *vif,
4516                                       struct ieee80211_sta *sta)
4517 {
4518         struct mwl8k_cmd_update_stadb *cmd;
4519         struct peer_capability_info *p;
4520         u32 rates;
4521         int rc;
4522
4523         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4524         if (cmd == NULL)
4525                 return -ENOMEM;
4526
4527         cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_STADB);
4528         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4529         cmd->action = cpu_to_le32(MWL8K_STA_DB_MODIFY_ENTRY);
4530         memcpy(cmd->peer_addr, sta->addr, ETH_ALEN);
4531
4532         p = &cmd->peer_info;
4533         p->peer_type = MWL8K_PEER_TYPE_ACCESSPOINT;
4534         p->basic_caps = cpu_to_le16(vif->bss_conf.assoc_capability);
4535         p->ht_support = sta->ht_cap.ht_supported;
4536         p->ht_caps = cpu_to_le16(sta->ht_cap.cap);
4537         p->extended_ht_caps = (sta->ht_cap.ampdu_factor & 3) |
4538                 ((sta->ht_cap.ampdu_density & 7) << 2);
4539         if (hw->conf.chandef.chan->band == IEEE80211_BAND_2GHZ)
4540                 rates = sta->supp_rates[IEEE80211_BAND_2GHZ];
4541         else
4542                 rates = sta->supp_rates[IEEE80211_BAND_5GHZ] << 5;
4543         legacy_rate_mask_to_array(p->legacy_rates, rates);
4544         memcpy(p->ht_rates, sta->ht_cap.mcs.rx_mask, 16);
4545         p->interop = 1;
4546         p->amsdu_enabled = 0;
4547
4548         rc = mwl8k_post_cmd(hw, &cmd->header);
4549         if (!rc)
4550                 rc = p->station_id;
4551         kfree(cmd);
4552
4553         return rc;
4554 }
4555
4556 static int mwl8k_cmd_update_stadb_del(struct ieee80211_hw *hw,
4557                                       struct ieee80211_vif *vif, u8 *addr)
4558 {
4559         struct mwl8k_cmd_update_stadb *cmd;
4560         int rc;
4561
4562         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4563         if (cmd == NULL)
4564                 return -ENOMEM;
4565
4566         cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_STADB);
4567         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4568         cmd->action = cpu_to_le32(MWL8K_STA_DB_DEL_ENTRY);
4569         memcpy(cmd->peer_addr, addr, ETH_ALEN);
4570
4571         rc = mwl8k_post_cmd(hw, &cmd->header);
4572         kfree(cmd);
4573
4574         return rc;
4575 }
4576
4577
4578 /*
4579  * Interrupt handling.
4580  */
4581 static irqreturn_t mwl8k_interrupt(int irq, void *dev_id)
4582 {
4583         struct ieee80211_hw *hw = dev_id;
4584         struct mwl8k_priv *priv = hw->priv;
4585         u32 status;
4586
4587         status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4588         if (!status)
4589                 return IRQ_NONE;
4590
4591         if (status & MWL8K_A2H_INT_TX_DONE) {
4592                 status &= ~MWL8K_A2H_INT_TX_DONE;
4593                 tasklet_schedule(&priv->poll_tx_task);
4594         }
4595
4596         if (status & MWL8K_A2H_INT_RX_READY) {
4597                 status &= ~MWL8K_A2H_INT_RX_READY;
4598                 tasklet_schedule(&priv->poll_rx_task);
4599         }
4600
4601         if (status & MWL8K_A2H_INT_BA_WATCHDOG) {
4602                 iowrite32(~MWL8K_A2H_INT_BA_WATCHDOG,
4603                           priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
4604
4605                 atomic_inc(&priv->watchdog_event_pending);
4606                 status &= ~MWL8K_A2H_INT_BA_WATCHDOG;
4607                 ieee80211_queue_work(hw, &priv->watchdog_ba_handle);
4608         }
4609
4610         if (status)
4611                 iowrite32(~status, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4612
4613         if (status & MWL8K_A2H_INT_OPC_DONE) {
4614                 if (priv->hostcmd_wait != NULL)
4615                         complete(priv->hostcmd_wait);
4616         }
4617
4618         if (status & MWL8K_A2H_INT_QUEUE_EMPTY) {
4619                 if (!mutex_is_locked(&priv->fw_mutex) &&
4620                     priv->radio_on && priv->pending_tx_pkts)
4621                         mwl8k_tx_start(priv);
4622         }
4623
4624         return IRQ_HANDLED;
4625 }
4626
4627 static void mwl8k_tx_poll(unsigned long data)
4628 {
4629         struct ieee80211_hw *hw = (struct ieee80211_hw *)data;
4630         struct mwl8k_priv *priv = hw->priv;
4631         int limit;
4632         int i;
4633
4634         limit = 32;
4635
4636         spin_lock_bh(&priv->tx_lock);
4637
4638         for (i = 0; i < mwl8k_tx_queues(priv); i++)
4639                 limit -= mwl8k_txq_reclaim(hw, i, limit, 0);
4640
4641         if (!priv->pending_tx_pkts && priv->tx_wait != NULL) {
4642                 complete(priv->tx_wait);
4643                 priv->tx_wait = NULL;
4644         }
4645
4646         spin_unlock_bh(&priv->tx_lock);
4647
4648         if (limit) {
4649                 writel(~MWL8K_A2H_INT_TX_DONE,
4650                        priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4651         } else {
4652                 tasklet_schedule(&priv->poll_tx_task);
4653         }
4654 }
4655
4656 static void mwl8k_rx_poll(unsigned long data)
4657 {
4658         struct ieee80211_hw *hw = (struct ieee80211_hw *)data;
4659         struct mwl8k_priv *priv = hw->priv;
4660         int limit;
4661
4662         limit = 32;
4663         limit -= rxq_process(hw, 0, limit);
4664         limit -= rxq_refill(hw, 0, limit);
4665
4666         if (limit) {
4667                 writel(~MWL8K_A2H_INT_RX_READY,
4668                        priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4669         } else {
4670                 tasklet_schedule(&priv->poll_rx_task);
4671         }
4672 }
4673
4674
4675 /*
4676  * Core driver operations.
4677  */
4678 static void mwl8k_tx(struct ieee80211_hw *hw,
4679                      struct ieee80211_tx_control *control,
4680                      struct sk_buff *skb)
4681 {
4682         struct mwl8k_priv *priv = hw->priv;
4683         int index = skb_get_queue_mapping(skb);
4684
4685         if (!priv->radio_on) {
4686                 wiphy_debug(hw->wiphy,
4687                             "dropped TX frame since radio disabled\n");
4688                 dev_kfree_skb(skb);
4689                 return;
4690         }
4691
4692         mwl8k_txq_xmit(hw, index, control->sta, skb);
4693 }
4694
4695 static int mwl8k_start(struct ieee80211_hw *hw)
4696 {
4697         struct mwl8k_priv *priv = hw->priv;
4698         int rc;
4699
4700         rc = request_irq(priv->pdev->irq, mwl8k_interrupt,
4701                          IRQF_SHARED, MWL8K_NAME, hw);
4702         if (rc) {
4703                 priv->irq = -1;
4704                 wiphy_err(hw->wiphy, "failed to register IRQ handler\n");
4705                 return -EIO;
4706         }
4707         priv->irq = priv->pdev->irq;
4708
4709         /* Enable TX reclaim and RX tasklets.  */
4710         tasklet_enable(&priv->poll_tx_task);
4711         tasklet_enable(&priv->poll_rx_task);
4712
4713         /* Enable interrupts */
4714         iowrite32(MWL8K_A2H_EVENTS, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4715         iowrite32(MWL8K_A2H_EVENTS,
4716                   priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
4717
4718         rc = mwl8k_fw_lock(hw);
4719         if (!rc) {
4720                 rc = mwl8k_cmd_radio_enable(hw);
4721
4722                 if (!priv->ap_fw) {
4723                         if (!rc)
4724                                 rc = mwl8k_cmd_enable_sniffer(hw, 0);
4725
4726                         if (!rc)
4727                                 rc = mwl8k_cmd_set_pre_scan(hw);
4728
4729                         if (!rc)
4730                                 rc = mwl8k_cmd_set_post_scan(hw,
4731                                                 "\x00\x00\x00\x00\x00\x00");
4732                 }
4733
4734                 if (!rc)
4735                         rc = mwl8k_cmd_set_rateadapt_mode(hw, 0);
4736
4737                 if (!rc)
4738                         rc = mwl8k_cmd_set_wmm_mode(hw, 0);
4739
4740                 mwl8k_fw_unlock(hw);
4741         }
4742
4743         if (rc) {
4744                 iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4745                 free_irq(priv->pdev->irq, hw);
4746                 priv->irq = -1;
4747                 tasklet_disable(&priv->poll_tx_task);
4748                 tasklet_disable(&priv->poll_rx_task);
4749         } else {
4750                 ieee80211_wake_queues(hw);
4751         }
4752
4753         return rc;
4754 }
4755
4756 static void mwl8k_stop(struct ieee80211_hw *hw)
4757 {
4758         struct mwl8k_priv *priv = hw->priv;
4759         int i;
4760
4761         if (!priv->hw_restart_in_progress)
4762                 mwl8k_cmd_radio_disable(hw);
4763
4764         ieee80211_stop_queues(hw);
4765
4766         /* Disable interrupts */
4767         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4768         if (priv->irq != -1) {
4769                 free_irq(priv->pdev->irq, hw);
4770                 priv->irq = -1;
4771         }
4772
4773         /* Stop finalize join worker */
4774         cancel_work_sync(&priv->finalize_join_worker);
4775         cancel_work_sync(&priv->watchdog_ba_handle);
4776         if (priv->beacon_skb != NULL)
4777                 dev_kfree_skb(priv->beacon_skb);
4778
4779         /* Stop TX reclaim and RX tasklets.  */
4780         tasklet_disable(&priv->poll_tx_task);
4781         tasklet_disable(&priv->poll_rx_task);
4782
4783         /* Return all skbs to mac80211 */
4784         for (i = 0; i < mwl8k_tx_queues(priv); i++)
4785                 mwl8k_txq_reclaim(hw, i, INT_MAX, 1);
4786 }
4787
4788 static int mwl8k_reload_firmware(struct ieee80211_hw *hw, char *fw_image);
4789
4790 static int mwl8k_add_interface(struct ieee80211_hw *hw,
4791                                struct ieee80211_vif *vif)
4792 {
4793         struct mwl8k_priv *priv = hw->priv;
4794         struct mwl8k_vif *mwl8k_vif;
4795         u32 macids_supported;
4796         int macid, rc;
4797         struct mwl8k_device_info *di;
4798
4799         /*
4800          * Reject interface creation if sniffer mode is active, as
4801          * STA operation is mutually exclusive with hardware sniffer
4802          * mode.  (Sniffer mode is only used on STA firmware.)
4803          */
4804         if (priv->sniffer_enabled) {
4805                 wiphy_info(hw->wiphy,
4806                            "unable to create STA interface because sniffer mode is enabled\n");
4807                 return -EINVAL;
4808         }
4809
4810         di = priv->device_info;
4811         switch (vif->type) {
4812         case NL80211_IFTYPE_AP:
4813                 if (!priv->ap_fw && di->fw_image_ap) {
4814                         /* we must load the ap fw to meet this request */
4815                         if (!list_empty(&priv->vif_list))
4816                                 return -EBUSY;
4817                         rc = mwl8k_reload_firmware(hw, di->fw_image_ap);
4818                         if (rc)
4819                                 return rc;
4820                 }
4821                 macids_supported = priv->ap_macids_supported;
4822                 break;
4823         case NL80211_IFTYPE_STATION:
4824                 if (priv->ap_fw && di->fw_image_sta) {
4825                         if (!list_empty(&priv->vif_list)) {
4826                                 wiphy_warn(hw->wiphy, "AP interface is running.\n"
4827                                            "Adding STA interface for WDS");
4828                         } else {
4829                                 /* we must load the sta fw to
4830                                  * meet this request.
4831                                  */
4832                                 rc = mwl8k_reload_firmware(hw,
4833                                                            di->fw_image_sta);
4834                                 if (rc)
4835                                         return rc;
4836                         }
4837                 }
4838                 macids_supported = priv->sta_macids_supported;
4839                 break;
4840         default:
4841                 return -EINVAL;
4842         }
4843
4844         macid = ffs(macids_supported & ~priv->macids_used);
4845         if (!macid--)
4846                 return -EBUSY;
4847
4848         /* Setup driver private area. */
4849         mwl8k_vif = MWL8K_VIF(vif);
4850         memset(mwl8k_vif, 0, sizeof(*mwl8k_vif));
4851         mwl8k_vif->vif = vif;
4852         mwl8k_vif->macid = macid;
4853         mwl8k_vif->seqno = 0;
4854         memcpy(mwl8k_vif->bssid, vif->addr, ETH_ALEN);
4855         mwl8k_vif->is_hw_crypto_enabled = false;
4856
4857         /* Set the mac address.  */
4858         mwl8k_cmd_set_mac_addr(hw, vif, vif->addr);
4859
4860         if (vif->type == NL80211_IFTYPE_AP)
4861                 mwl8k_cmd_set_new_stn_add_self(hw, vif);
4862
4863         priv->macids_used |= 1 << mwl8k_vif->macid;
4864         list_add_tail(&mwl8k_vif->list, &priv->vif_list);
4865
4866         return 0;
4867 }
4868
4869 static void mwl8k_remove_vif(struct mwl8k_priv *priv, struct mwl8k_vif *vif)
4870 {
4871         /* Has ieee80211_restart_hw re-added the removed interfaces? */
4872         if (!priv->macids_used)
4873                 return;
4874
4875         priv->macids_used &= ~(1 << vif->macid);
4876         list_del(&vif->list);
4877 }
4878
4879 static void mwl8k_remove_interface(struct ieee80211_hw *hw,
4880                                    struct ieee80211_vif *vif)
4881 {
4882         struct mwl8k_priv *priv = hw->priv;
4883         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4884
4885         if (vif->type == NL80211_IFTYPE_AP)
4886                 mwl8k_cmd_set_new_stn_del(hw, vif, vif->addr);
4887
4888         mwl8k_cmd_del_mac_addr(hw, vif, vif->addr);
4889
4890         mwl8k_remove_vif(priv, mwl8k_vif);
4891 }
4892
4893 static void mwl8k_hw_restart_work(struct work_struct *work)
4894 {
4895         struct mwl8k_priv *priv =
4896                 container_of(work, struct mwl8k_priv, fw_reload);
4897         struct ieee80211_hw *hw = priv->hw;
4898         struct mwl8k_device_info *di;
4899         int rc;
4900
4901         /* If some command is waiting for a response, clear it */
4902         if (priv->hostcmd_wait != NULL) {
4903                 complete(priv->hostcmd_wait);
4904                 priv->hostcmd_wait = NULL;
4905         }
4906
4907         priv->hw_restart_owner = current;
4908         di = priv->device_info;
4909         mwl8k_fw_lock(hw);
4910
4911         if (priv->ap_fw)
4912                 rc = mwl8k_reload_firmware(hw, di->fw_image_ap);
4913         else
4914                 rc = mwl8k_reload_firmware(hw, di->fw_image_sta);
4915
4916         if (rc)
4917                 goto fail;
4918
4919         priv->hw_restart_owner = NULL;
4920         priv->hw_restart_in_progress = false;
4921
4922         /*
4923          * This unlock will wake up the queues and
4924          * also opens the command path for other
4925          * commands
4926          */
4927         mwl8k_fw_unlock(hw);
4928
4929         ieee80211_restart_hw(hw);
4930
4931         wiphy_err(hw->wiphy, "Firmware restarted successfully\n");
4932
4933         return;
4934 fail:
4935         mwl8k_fw_unlock(hw);
4936
4937         wiphy_err(hw->wiphy, "Firmware restart failed\n");
4938 }
4939
4940 static int mwl8k_config(struct ieee80211_hw *hw, u32 changed)
4941 {
4942         struct ieee80211_conf *conf = &hw->conf;
4943         struct mwl8k_priv *priv = hw->priv;
4944         int rc;
4945
4946         rc = mwl8k_fw_lock(hw);
4947         if (rc)
4948                 return rc;
4949
4950         if (conf->flags & IEEE80211_CONF_IDLE)
4951                 rc = mwl8k_cmd_radio_disable(hw);
4952         else
4953                 rc = mwl8k_cmd_radio_enable(hw);
4954         if (rc)
4955                 goto out;
4956
4957         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
4958                 rc = mwl8k_cmd_set_rf_channel(hw, conf);
4959                 if (rc)
4960                         goto out;
4961         }
4962
4963         if (conf->power_level > 18)
4964                 conf->power_level = 18;
4965
4966         if (priv->ap_fw) {
4967
4968                 if (conf->flags & IEEE80211_CONF_CHANGE_POWER) {
4969                         rc = mwl8k_cmd_tx_power(hw, conf, conf->power_level);
4970                         if (rc)
4971                                 goto out;
4972                 }
4973
4974
4975         } else {
4976                 rc = mwl8k_cmd_rf_tx_power(hw, conf->power_level);
4977                 if (rc)
4978                         goto out;
4979                 rc = mwl8k_cmd_mimo_config(hw, 0x7, 0x7);
4980         }
4981
4982 out:
4983         mwl8k_fw_unlock(hw);
4984
4985         return rc;
4986 }
4987
4988 static void
4989 mwl8k_bss_info_changed_sta(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4990                            struct ieee80211_bss_conf *info, u32 changed)
4991 {
4992         struct mwl8k_priv *priv = hw->priv;
4993         u32 ap_legacy_rates = 0;
4994         u8 ap_mcs_rates[16];
4995         int rc;
4996
4997         if (mwl8k_fw_lock(hw))
4998                 return;
4999
5000         /*
5001          * No need to capture a beacon if we're no longer associated.
5002          */
5003         if ((changed & BSS_CHANGED_ASSOC) && !vif->bss_conf.assoc)
5004                 priv->capture_beacon = false;
5005
5006         /*
5007          * Get the AP's legacy and MCS rates.
5008          */
5009         if (vif->bss_conf.assoc) {
5010                 struct ieee80211_sta *ap;
5011
5012                 rcu_read_lock();
5013
5014                 ap = ieee80211_find_sta(vif, vif->bss_conf.bssid);
5015                 if (ap == NULL) {
5016                         rcu_read_unlock();
5017                         goto out;
5018                 }
5019
5020                 if (hw->conf.chandef.chan->band == IEEE80211_BAND_2GHZ) {
5021                         ap_legacy_rates = ap->supp_rates[IEEE80211_BAND_2GHZ];
5022                 } else {
5023                         ap_legacy_rates =
5024                                 ap->supp_rates[IEEE80211_BAND_5GHZ] << 5;
5025                 }
5026                 memcpy(ap_mcs_rates, ap->ht_cap.mcs.rx_mask, 16);
5027
5028                 rcu_read_unlock();
5029         }
5030
5031         if ((changed & BSS_CHANGED_ASSOC) && vif->bss_conf.assoc &&
5032             !priv->ap_fw) {
5033                 rc = mwl8k_cmd_set_rate(hw, vif, ap_legacy_rates, ap_mcs_rates);
5034                 if (rc)
5035                         goto out;
5036
5037                 rc = mwl8k_cmd_use_fixed_rate_sta(hw);
5038                 if (rc)
5039                         goto out;
5040         } else {
5041                 if ((changed & BSS_CHANGED_ASSOC) && vif->bss_conf.assoc &&
5042                     priv->ap_fw) {
5043                         int idx;
5044                         int rate;
5045
5046                         /* Use AP firmware specific rate command.
5047                          */
5048                         idx = ffs(vif->bss_conf.basic_rates);
5049                         if (idx)
5050                                 idx--;
5051
5052                         if (hw->conf.chandef.chan->band == IEEE80211_BAND_2GHZ)
5053                                 rate = mwl8k_rates_24[idx].hw_value;
5054                         else
5055                                 rate = mwl8k_rates_50[idx].hw_value;
5056
5057                         mwl8k_cmd_use_fixed_rate_ap(hw, rate, rate);
5058                 }
5059         }
5060
5061         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
5062                 rc = mwl8k_set_radio_preamble(hw,
5063                                 vif->bss_conf.use_short_preamble);
5064                 if (rc)
5065                         goto out;
5066         }
5067
5068         if ((changed & BSS_CHANGED_ERP_SLOT) && !priv->ap_fw)  {
5069                 rc = mwl8k_cmd_set_slot(hw, vif->bss_conf.use_short_slot);
5070                 if (rc)
5071                         goto out;
5072         }
5073
5074         if (vif->bss_conf.assoc && !priv->ap_fw &&
5075             (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_ERP_CTS_PROT |
5076                         BSS_CHANGED_HT))) {
5077                 rc = mwl8k_cmd_set_aid(hw, vif, ap_legacy_rates);
5078                 if (rc)
5079                         goto out;
5080         }
5081
5082         if (vif->bss_conf.assoc &&
5083             (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_BEACON_INT))) {
5084                 /*
5085                  * Finalize the join.  Tell rx handler to process
5086                  * next beacon from our BSSID.
5087                  */
5088                 memcpy(priv->capture_bssid, vif->bss_conf.bssid, ETH_ALEN);
5089                 priv->capture_beacon = true;
5090         }
5091
5092 out:
5093         mwl8k_fw_unlock(hw);
5094 }
5095
5096 static void
5097 mwl8k_bss_info_changed_ap(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5098                           struct ieee80211_bss_conf *info, u32 changed)
5099 {
5100         int rc;
5101
5102         if (mwl8k_fw_lock(hw))
5103                 return;
5104
5105         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
5106                 rc = mwl8k_set_radio_preamble(hw,
5107                                 vif->bss_conf.use_short_preamble);
5108                 if (rc)
5109                         goto out;
5110         }
5111
5112         if (changed & BSS_CHANGED_BASIC_RATES) {
5113                 int idx;
5114                 int rate;
5115
5116                 /*
5117                  * Use lowest supported basic rate for multicasts
5118                  * and management frames (such as probe responses --
5119                  * beacons will always go out at 1 Mb/s).
5120                  */
5121                 idx = ffs(vif->bss_conf.basic_rates);
5122                 if (idx)
5123                         idx--;
5124
5125                 if (hw->conf.chandef.chan->band == IEEE80211_BAND_2GHZ)
5126                         rate = mwl8k_rates_24[idx].hw_value;
5127                 else
5128                         rate = mwl8k_rates_50[idx].hw_value;
5129
5130                 mwl8k_cmd_use_fixed_rate_ap(hw, rate, rate);
5131         }
5132
5133         if (changed & (BSS_CHANGED_BEACON_INT | BSS_CHANGED_BEACON)) {
5134                 struct sk_buff *skb;
5135
5136                 skb = ieee80211_beacon_get(hw, vif);
5137                 if (skb != NULL) {
5138                         mwl8k_cmd_set_beacon(hw, vif, skb->data, skb->len);
5139                         kfree_skb(skb);
5140                 }
5141         }
5142
5143         if (changed & BSS_CHANGED_BEACON_ENABLED)
5144                 mwl8k_cmd_bss_start(hw, vif, info->enable_beacon);
5145
5146 out:
5147         mwl8k_fw_unlock(hw);
5148 }
5149
5150 static void
5151 mwl8k_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5152                        struct ieee80211_bss_conf *info, u32 changed)
5153 {
5154         if (vif->type == NL80211_IFTYPE_STATION)
5155                 mwl8k_bss_info_changed_sta(hw, vif, info, changed);
5156         if (vif->type == NL80211_IFTYPE_AP)
5157                 mwl8k_bss_info_changed_ap(hw, vif, info, changed);
5158 }
5159
5160 static u64 mwl8k_prepare_multicast(struct ieee80211_hw *hw,
5161                                    struct netdev_hw_addr_list *mc_list)
5162 {
5163         struct mwl8k_cmd_pkt *cmd;
5164
5165         /*
5166          * Synthesize and return a command packet that programs the
5167          * hardware multicast address filter.  At this point we don't
5168          * know whether FIF_ALLMULTI is being requested, but if it is,
5169          * we'll end up throwing this packet away and creating a new
5170          * one in mwl8k_configure_filter().
5171          */
5172         cmd = __mwl8k_cmd_mac_multicast_adr(hw, 0, mc_list);
5173
5174         return (unsigned long)cmd;
5175 }
5176
5177 static int
5178 mwl8k_configure_filter_sniffer(struct ieee80211_hw *hw,
5179                                unsigned int changed_flags,
5180                                unsigned int *total_flags)
5181 {
5182         struct mwl8k_priv *priv = hw->priv;
5183
5184         /*
5185          * Hardware sniffer mode is mutually exclusive with STA
5186          * operation, so refuse to enable sniffer mode if a STA
5187          * interface is active.
5188          */
5189         if (!list_empty(&priv->vif_list)) {
5190                 if (net_ratelimit())
5191                         wiphy_info(hw->wiphy,
5192                                    "not enabling sniffer mode because STA interface is active\n");
5193                 return 0;
5194         }
5195
5196         if (!priv->sniffer_enabled) {
5197                 if (mwl8k_cmd_enable_sniffer(hw, 1))
5198                         return 0;
5199                 priv->sniffer_enabled = true;
5200         }
5201
5202         *total_flags &= FIF_PROMISC_IN_BSS | FIF_ALLMULTI |
5203                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL |
5204                         FIF_OTHER_BSS;
5205
5206         return 1;
5207 }
5208
5209 static struct mwl8k_vif *mwl8k_first_vif(struct mwl8k_priv *priv)
5210 {
5211         if (!list_empty(&priv->vif_list))
5212                 return list_entry(priv->vif_list.next, struct mwl8k_vif, list);
5213
5214         return NULL;
5215 }
5216
5217 static void mwl8k_configure_filter(struct ieee80211_hw *hw,
5218                                    unsigned int changed_flags,
5219                                    unsigned int *total_flags,
5220                                    u64 multicast)
5221 {
5222         struct mwl8k_priv *priv = hw->priv;
5223         struct mwl8k_cmd_pkt *cmd = (void *)(unsigned long)multicast;
5224
5225         /*
5226          * AP firmware doesn't allow fine-grained control over
5227          * the receive filter.
5228          */
5229         if (priv->ap_fw) {
5230                 *total_flags &= FIF_ALLMULTI | FIF_BCN_PRBRESP_PROMISC;
5231                 kfree(cmd);
5232                 return;
5233         }
5234
5235         /*
5236          * Enable hardware sniffer mode if FIF_CONTROL or
5237          * FIF_OTHER_BSS is requested.
5238          */
5239         if (*total_flags & (FIF_CONTROL | FIF_OTHER_BSS) &&
5240             mwl8k_configure_filter_sniffer(hw, changed_flags, total_flags)) {
5241                 kfree(cmd);
5242                 return;
5243         }
5244
5245         /* Clear unsupported feature flags */
5246         *total_flags &= FIF_ALLMULTI | FIF_BCN_PRBRESP_PROMISC;
5247
5248         if (mwl8k_fw_lock(hw)) {
5249                 kfree(cmd);
5250                 return;
5251         }
5252
5253         if (priv->sniffer_enabled) {
5254                 mwl8k_cmd_enable_sniffer(hw, 0);
5255                 priv->sniffer_enabled = false;
5256         }
5257
5258         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
5259                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC) {
5260                         /*
5261                          * Disable the BSS filter.
5262                          */
5263                         mwl8k_cmd_set_pre_scan(hw);
5264                 } else {
5265                         struct mwl8k_vif *mwl8k_vif;
5266                         const u8 *bssid;
5267
5268                         /*
5269                          * Enable the BSS filter.
5270                          *
5271                          * If there is an active STA interface, use that
5272                          * interface's BSSID, otherwise use a dummy one
5273                          * (where the OUI part needs to be nonzero for
5274                          * the BSSID to be accepted by POST_SCAN).
5275                          */
5276                         mwl8k_vif = mwl8k_first_vif(priv);
5277                         if (mwl8k_vif != NULL)
5278                                 bssid = mwl8k_vif->vif->bss_conf.bssid;
5279                         else
5280                                 bssid = "\x01\x00\x00\x00\x00\x00";
5281
5282                         mwl8k_cmd_set_post_scan(hw, bssid);
5283                 }
5284         }
5285
5286         /*
5287          * If FIF_ALLMULTI is being requested, throw away the command
5288          * packet that ->prepare_multicast() built and replace it with
5289          * a command packet that enables reception of all multicast
5290          * packets.
5291          */
5292         if (*total_flags & FIF_ALLMULTI) {
5293                 kfree(cmd);
5294                 cmd = __mwl8k_cmd_mac_multicast_adr(hw, 1, NULL);
5295         }
5296
5297         if (cmd != NULL) {
5298                 mwl8k_post_cmd(hw, cmd);
5299                 kfree(cmd);
5300         }
5301
5302         mwl8k_fw_unlock(hw);
5303 }
5304
5305 static int mwl8k_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
5306 {
5307         return mwl8k_cmd_set_rts_threshold(hw, value);
5308 }
5309
5310 static int mwl8k_sta_remove(struct ieee80211_hw *hw,
5311                             struct ieee80211_vif *vif,
5312                             struct ieee80211_sta *sta)
5313 {
5314         struct mwl8k_priv *priv = hw->priv;
5315
5316         if (priv->ap_fw)
5317                 return mwl8k_cmd_set_new_stn_del(hw, vif, sta->addr);
5318         else
5319                 return mwl8k_cmd_update_stadb_del(hw, vif, sta->addr);
5320 }
5321
5322 static int mwl8k_sta_add(struct ieee80211_hw *hw,
5323                          struct ieee80211_vif *vif,
5324                          struct ieee80211_sta *sta)
5325 {
5326         struct mwl8k_priv *priv = hw->priv;
5327         int ret;
5328         int i;
5329         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
5330         struct ieee80211_key_conf *key;
5331
5332         if (!priv->ap_fw) {
5333                 ret = mwl8k_cmd_update_stadb_add(hw, vif, sta);
5334                 if (ret >= 0) {
5335                         MWL8K_STA(sta)->peer_id = ret;
5336                         if (sta->ht_cap.ht_supported)
5337                                 MWL8K_STA(sta)->is_ampdu_allowed = true;
5338                         ret = 0;
5339                 }
5340
5341         } else {
5342                 ret = mwl8k_cmd_set_new_stn_add(hw, vif, sta);
5343         }
5344
5345         for (i = 0; i < NUM_WEP_KEYS; i++) {
5346                 key = IEEE80211_KEY_CONF(mwl8k_vif->wep_key_conf[i].key);
5347                 if (mwl8k_vif->wep_key_conf[i].enabled)
5348                         mwl8k_set_key(hw, SET_KEY, vif, sta, key);
5349         }
5350         return ret;
5351 }
5352
5353 static int mwl8k_conf_tx(struct ieee80211_hw *hw,
5354                          struct ieee80211_vif *vif, u16 queue,
5355                          const struct ieee80211_tx_queue_params *params)
5356 {
5357         struct mwl8k_priv *priv = hw->priv;
5358         int rc;
5359
5360         rc = mwl8k_fw_lock(hw);
5361         if (!rc) {
5362                 BUG_ON(queue > MWL8K_TX_WMM_QUEUES - 1);
5363                 memcpy(&priv->wmm_params[queue], params, sizeof(*params));
5364
5365                 if (!priv->wmm_enabled)
5366                         rc = mwl8k_cmd_set_wmm_mode(hw, 1);
5367
5368                 if (!rc) {
5369                         int q = MWL8K_TX_WMM_QUEUES - 1 - queue;
5370                         rc = mwl8k_cmd_set_edca_params(hw, q,
5371                                                        params->cw_min,
5372                                                        params->cw_max,
5373                                                        params->aifs,
5374                                                        params->txop);
5375                 }
5376
5377                 mwl8k_fw_unlock(hw);
5378         }
5379
5380         return rc;
5381 }
5382
5383 static int mwl8k_get_stats(struct ieee80211_hw *hw,
5384                            struct ieee80211_low_level_stats *stats)
5385 {
5386         return mwl8k_cmd_get_stat(hw, stats);
5387 }
5388
5389 static int mwl8k_get_survey(struct ieee80211_hw *hw, int idx,
5390                                 struct survey_info *survey)
5391 {
5392         struct mwl8k_priv *priv = hw->priv;
5393         struct ieee80211_conf *conf = &hw->conf;
5394         struct ieee80211_supported_band *sband;
5395
5396         if (priv->ap_fw) {
5397                 sband = hw->wiphy->bands[IEEE80211_BAND_2GHZ];
5398
5399                 if (sband && idx >= sband->n_channels) {
5400                         idx -= sband->n_channels;
5401                         sband = NULL;
5402                 }
5403
5404                 if (!sband)
5405                         sband = hw->wiphy->bands[IEEE80211_BAND_5GHZ];
5406
5407                 if (!sband || idx >= sband->n_channels)
5408                         return -ENOENT;
5409
5410                 memcpy(survey, &priv->survey[idx], sizeof(*survey));
5411                 survey->channel = &sband->channels[idx];
5412
5413                 return 0;
5414         }
5415
5416         if (idx != 0)
5417                 return -ENOENT;
5418
5419         survey->channel = conf->chandef.chan;
5420         survey->filled = SURVEY_INFO_NOISE_DBM;
5421         survey->noise = priv->noise;
5422
5423         return 0;
5424 }
5425
5426 #define MAX_AMPDU_ATTEMPTS 5
5427
5428 static int
5429 mwl8k_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5430                    enum ieee80211_ampdu_mlme_action action,
5431                    struct ieee80211_sta *sta, u16 tid, u16 *ssn,
5432                    u8 buf_size)
5433 {
5434
5435         int i, rc = 0;
5436         struct mwl8k_priv *priv = hw->priv;
5437         struct mwl8k_ampdu_stream *stream;
5438         u8 *addr = sta->addr, idx;
5439         struct mwl8k_sta *sta_info = MWL8K_STA(sta);
5440
5441         if (!(hw->flags & IEEE80211_HW_AMPDU_AGGREGATION))
5442                 return -ENOTSUPP;
5443
5444         spin_lock(&priv->stream_lock);
5445         stream = mwl8k_lookup_stream(hw, addr, tid);
5446
5447         switch (action) {
5448         case IEEE80211_AMPDU_RX_START:
5449         case IEEE80211_AMPDU_RX_STOP:
5450                 break;
5451         case IEEE80211_AMPDU_TX_START:
5452                 /* By the time we get here the hw queues may contain outgoing
5453                  * packets for this RA/TID that are not part of this BA
5454                  * session.  The hw will assign sequence numbers to these
5455                  * packets as they go out.  So if we query the hw for its next
5456                  * sequence number and use that for the SSN here, it may end up
5457                  * being wrong, which will lead to sequence number mismatch at
5458                  * the recipient.  To avoid this, we reset the sequence number
5459                  * to O for the first MPDU in this BA stream.
5460                  */
5461                 *ssn = 0;
5462                 if (stream == NULL) {
5463                         /* This means that somebody outside this driver called
5464                          * ieee80211_start_tx_ba_session.  This is unexpected
5465                          * because we do our own rate control.  Just warn and
5466                          * move on.
5467                          */
5468                         wiphy_warn(hw->wiphy, "Unexpected call to %s.  "
5469                                    "Proceeding anyway.\n", __func__);
5470                         stream = mwl8k_add_stream(hw, sta, tid);
5471                 }
5472                 if (stream == NULL) {
5473                         wiphy_debug(hw->wiphy, "no free AMPDU streams\n");
5474                         rc = -EBUSY;
5475                         break;
5476                 }
5477                 stream->state = AMPDU_STREAM_IN_PROGRESS;
5478
5479                 /* Release the lock before we do the time consuming stuff */
5480                 spin_unlock(&priv->stream_lock);
5481                 for (i = 0; i < MAX_AMPDU_ATTEMPTS; i++) {
5482
5483                         /* Check if link is still valid */
5484                         if (!sta_info->is_ampdu_allowed) {
5485                                 spin_lock(&priv->stream_lock);
5486                                 mwl8k_remove_stream(hw, stream);
5487                                 spin_unlock(&priv->stream_lock);
5488                                 return -EBUSY;
5489                         }
5490
5491                         rc = mwl8k_check_ba(hw, stream, vif);
5492
5493                         /* If HW restart is in progress mwl8k_post_cmd will
5494                          * return -EBUSY. Avoid retrying mwl8k_check_ba in
5495                          * such cases
5496                          */
5497                         if (!rc || rc == -EBUSY)
5498                                 break;
5499                         /*
5500                          * HW queues take time to be flushed, give them
5501                          * sufficient time
5502                          */
5503
5504                         msleep(1000);
5505                 }
5506                 spin_lock(&priv->stream_lock);
5507                 if (rc) {
5508                         wiphy_err(hw->wiphy, "Stream for tid %d busy after %d"
5509                                 " attempts\n", tid, MAX_AMPDU_ATTEMPTS);
5510                         mwl8k_remove_stream(hw, stream);
5511                         rc = -EBUSY;
5512                         break;
5513                 }
5514                 ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid);
5515                 break;
5516         case IEEE80211_AMPDU_TX_STOP_CONT:
5517         case IEEE80211_AMPDU_TX_STOP_FLUSH:
5518         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
5519                 if (stream) {
5520                         if (stream->state == AMPDU_STREAM_ACTIVE) {
5521                                 idx = stream->idx;
5522                                 spin_unlock(&priv->stream_lock);
5523                                 mwl8k_destroy_ba(hw, idx);
5524                                 spin_lock(&priv->stream_lock);
5525                         }
5526                         mwl8k_remove_stream(hw, stream);
5527                 }
5528                 ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
5529                 break;
5530         case IEEE80211_AMPDU_TX_OPERATIONAL:
5531                 BUG_ON(stream == NULL);
5532                 BUG_ON(stream->state != AMPDU_STREAM_IN_PROGRESS);
5533                 spin_unlock(&priv->stream_lock);
5534                 rc = mwl8k_create_ba(hw, stream, buf_size, vif);
5535                 spin_lock(&priv->stream_lock);
5536                 if (!rc)
5537                         stream->state = AMPDU_STREAM_ACTIVE;
5538                 else {
5539                         idx = stream->idx;
5540                         spin_unlock(&priv->stream_lock);
5541                         mwl8k_destroy_ba(hw, idx);
5542                         spin_lock(&priv->stream_lock);
5543                         wiphy_debug(hw->wiphy,
5544                                 "Failed adding stream for sta %pM tid %d\n",
5545                                 addr, tid);
5546                         mwl8k_remove_stream(hw, stream);
5547                 }
5548                 break;
5549
5550         default:
5551                 rc = -ENOTSUPP;
5552         }
5553
5554         spin_unlock(&priv->stream_lock);
5555         return rc;
5556 }
5557
5558 static void mwl8k_sw_scan_start(struct ieee80211_hw *hw)
5559 {
5560         struct mwl8k_priv *priv = hw->priv;
5561         u8 tmp;
5562
5563         if (!priv->ap_fw)
5564                 return;
5565
5566         /* clear all stats */
5567         priv->channel_time = 0;
5568         ioread32(priv->regs + BBU_RXRDY_CNT_REG);
5569         ioread32(priv->regs + NOK_CCA_CNT_REG);
5570         mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &tmp);
5571
5572         priv->sw_scan_start = true;
5573 }
5574
5575 static void mwl8k_sw_scan_complete(struct ieee80211_hw *hw)
5576 {
5577         struct mwl8k_priv *priv = hw->priv;
5578         u8 tmp;
5579
5580         if (!priv->ap_fw)
5581                 return;
5582
5583         priv->sw_scan_start = false;
5584
5585         /* clear all stats */
5586         priv->channel_time = 0;
5587         ioread32(priv->regs + BBU_RXRDY_CNT_REG);
5588         ioread32(priv->regs + NOK_CCA_CNT_REG);
5589         mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &tmp);
5590 }
5591
5592 static const struct ieee80211_ops mwl8k_ops = {
5593         .tx                     = mwl8k_tx,
5594         .start                  = mwl8k_start,
5595         .stop                   = mwl8k_stop,
5596         .add_interface          = mwl8k_add_interface,
5597         .remove_interface       = mwl8k_remove_interface,
5598         .config                 = mwl8k_config,
5599         .bss_info_changed       = mwl8k_bss_info_changed,
5600         .prepare_multicast      = mwl8k_prepare_multicast,
5601         .configure_filter       = mwl8k_configure_filter,
5602         .set_key                = mwl8k_set_key,
5603         .set_rts_threshold      = mwl8k_set_rts_threshold,
5604         .sta_add                = mwl8k_sta_add,
5605         .sta_remove             = mwl8k_sta_remove,
5606         .conf_tx                = mwl8k_conf_tx,
5607         .get_stats              = mwl8k_get_stats,
5608         .get_survey             = mwl8k_get_survey,
5609         .ampdu_action           = mwl8k_ampdu_action,
5610         .sw_scan_start          = mwl8k_sw_scan_start,
5611         .sw_scan_complete       = mwl8k_sw_scan_complete,
5612 };
5613
5614 static void mwl8k_finalize_join_worker(struct work_struct *work)
5615 {
5616         struct mwl8k_priv *priv =
5617                 container_of(work, struct mwl8k_priv, finalize_join_worker);
5618         struct sk_buff *skb = priv->beacon_skb;
5619         struct ieee80211_mgmt *mgmt = (void *)skb->data;
5620         int len = skb->len - offsetof(struct ieee80211_mgmt, u.beacon.variable);
5621         const u8 *tim = cfg80211_find_ie(WLAN_EID_TIM,
5622                                          mgmt->u.beacon.variable, len);
5623         int dtim_period = 1;
5624
5625         if (tim && tim[1] >= 2)
5626                 dtim_period = tim[3];
5627
5628         mwl8k_cmd_finalize_join(priv->hw, skb->data, skb->len, dtim_period);
5629
5630         dev_kfree_skb(skb);
5631         priv->beacon_skb = NULL;
5632 }
5633
5634 enum {
5635         MWL8363 = 0,
5636         MWL8687,
5637         MWL8366,
5638         MWL8764,
5639 };
5640
5641 #define MWL8K_8366_AP_FW_API 3
5642 #define _MWL8K_8366_AP_FW(api) "mwl8k/fmimage_8366_ap-" #api ".fw"
5643 #define MWL8K_8366_AP_FW(api) _MWL8K_8366_AP_FW(api)
5644
5645 #define MWL8K_8764_AP_FW_API 1
5646 #define _MWL8K_8764_AP_FW(api) "mwl8k/fmimage_8764_ap-" #api ".fw"
5647 #define MWL8K_8764_AP_FW(api) _MWL8K_8764_AP_FW(api)
5648
5649 static struct mwl8k_device_info mwl8k_info_tbl[] = {
5650         [MWL8363] = {
5651                 .part_name      = "88w8363",
5652                 .helper_image   = "mwl8k/helper_8363.fw",
5653                 .fw_image_sta   = "mwl8k/fmimage_8363.fw",
5654         },
5655         [MWL8687] = {
5656                 .part_name      = "88w8687",
5657                 .helper_image   = "mwl8k/helper_8687.fw",
5658                 .fw_image_sta   = "mwl8k/fmimage_8687.fw",
5659         },
5660         [MWL8366] = {
5661                 .part_name      = "88w8366",
5662                 .helper_image   = "mwl8k/helper_8366.fw",
5663                 .fw_image_sta   = "mwl8k/fmimage_8366.fw",
5664                 .fw_image_ap    = MWL8K_8366_AP_FW(MWL8K_8366_AP_FW_API),
5665                 .fw_api_ap      = MWL8K_8366_AP_FW_API,
5666                 .ap_rxd_ops     = &rxd_ap_ops,
5667         },
5668         [MWL8764] = {
5669                 .part_name      = "88w8764",
5670                 .fw_image_ap    = MWL8K_8764_AP_FW(MWL8K_8764_AP_FW_API),
5671                 .fw_api_ap      = MWL8K_8764_AP_FW_API,
5672                 .ap_rxd_ops     = &rxd_ap_ops,
5673         },
5674 };
5675
5676 MODULE_FIRMWARE("mwl8k/helper_8363.fw");
5677 MODULE_FIRMWARE("mwl8k/fmimage_8363.fw");
5678 MODULE_FIRMWARE("mwl8k/helper_8687.fw");
5679 MODULE_FIRMWARE("mwl8k/fmimage_8687.fw");
5680 MODULE_FIRMWARE("mwl8k/helper_8366.fw");
5681 MODULE_FIRMWARE("mwl8k/fmimage_8366.fw");
5682 MODULE_FIRMWARE(MWL8K_8366_AP_FW(MWL8K_8366_AP_FW_API));
5683
5684 static DEFINE_PCI_DEVICE_TABLE(mwl8k_pci_id_table) = {
5685         { PCI_VDEVICE(MARVELL, 0x2a0a), .driver_data = MWL8363, },
5686         { PCI_VDEVICE(MARVELL, 0x2a0c), .driver_data = MWL8363, },
5687         { PCI_VDEVICE(MARVELL, 0x2a24), .driver_data = MWL8363, },
5688         { PCI_VDEVICE(MARVELL, 0x2a2b), .driver_data = MWL8687, },
5689         { PCI_VDEVICE(MARVELL, 0x2a30), .driver_data = MWL8687, },
5690         { PCI_VDEVICE(MARVELL, 0x2a40), .driver_data = MWL8366, },
5691         { PCI_VDEVICE(MARVELL, 0x2a41), .driver_data = MWL8366, },
5692         { PCI_VDEVICE(MARVELL, 0x2a42), .driver_data = MWL8366, },
5693         { PCI_VDEVICE(MARVELL, 0x2a43), .driver_data = MWL8366, },
5694         { PCI_VDEVICE(MARVELL, 0x2b36), .driver_data = MWL8764, },
5695         { },
5696 };
5697 MODULE_DEVICE_TABLE(pci, mwl8k_pci_id_table);
5698
5699 static int mwl8k_request_alt_fw(struct mwl8k_priv *priv)
5700 {
5701         int rc;
5702         printk(KERN_ERR "%s: Error requesting preferred fw %s.\n"
5703                "Trying alternative firmware %s\n", pci_name(priv->pdev),
5704                priv->fw_pref, priv->fw_alt);
5705         rc = mwl8k_request_fw(priv, priv->fw_alt, &priv->fw_ucode, true);
5706         if (rc) {
5707                 printk(KERN_ERR "%s: Error requesting alt fw %s\n",
5708                        pci_name(priv->pdev), priv->fw_alt);
5709                 return rc;
5710         }
5711         return 0;
5712 }
5713
5714 static int mwl8k_firmware_load_success(struct mwl8k_priv *priv);
5715 static void mwl8k_fw_state_machine(const struct firmware *fw, void *context)
5716 {
5717         struct mwl8k_priv *priv = context;
5718         struct mwl8k_device_info *di = priv->device_info;
5719         int rc;
5720
5721         switch (priv->fw_state) {
5722         case FW_STATE_INIT:
5723                 if (!fw) {
5724                         printk(KERN_ERR "%s: Error requesting helper fw %s\n",
5725                                pci_name(priv->pdev), di->helper_image);
5726                         goto fail;
5727                 }
5728                 priv->fw_helper = fw;
5729                 rc = mwl8k_request_fw(priv, priv->fw_pref, &priv->fw_ucode,
5730                                       true);
5731                 if (rc && priv->fw_alt) {
5732                         rc = mwl8k_request_alt_fw(priv);
5733                         if (rc)
5734                                 goto fail;
5735                         priv->fw_state = FW_STATE_LOADING_ALT;
5736                 } else if (rc)
5737                         goto fail;
5738                 else
5739                         priv->fw_state = FW_STATE_LOADING_PREF;
5740                 break;
5741
5742         case FW_STATE_LOADING_PREF:
5743                 if (!fw) {
5744                         if (priv->fw_alt) {
5745                                 rc = mwl8k_request_alt_fw(priv);
5746                                 if (rc)
5747                                         goto fail;
5748                                 priv->fw_state = FW_STATE_LOADING_ALT;
5749                         } else
5750                                 goto fail;
5751                 } else {
5752                         priv->fw_ucode = fw;
5753                         rc = mwl8k_firmware_load_success(priv);
5754                         if (rc)
5755                                 goto fail;
5756                         else
5757                                 complete(&priv->firmware_loading_complete);
5758                 }
5759                 break;
5760
5761         case FW_STATE_LOADING_ALT:
5762                 if (!fw) {
5763                         printk(KERN_ERR "%s: Error requesting alt fw %s\n",
5764                                pci_name(priv->pdev), di->helper_image);
5765                         goto fail;
5766                 }
5767                 priv->fw_ucode = fw;
5768                 rc = mwl8k_firmware_load_success(priv);
5769                 if (rc)
5770                         goto fail;
5771                 else
5772                         complete(&priv->firmware_loading_complete);
5773                 break;
5774
5775         default:
5776                 printk(KERN_ERR "%s: Unexpected firmware loading state: %d\n",
5777                        MWL8K_NAME, priv->fw_state);
5778                 BUG_ON(1);
5779         }
5780
5781         return;
5782
5783 fail:
5784         priv->fw_state = FW_STATE_ERROR;
5785         complete(&priv->firmware_loading_complete);
5786         device_release_driver(&priv->pdev->dev);
5787         mwl8k_release_firmware(priv);
5788 }
5789
5790 #define MAX_RESTART_ATTEMPTS 1
5791 static int mwl8k_init_firmware(struct ieee80211_hw *hw, char *fw_image,
5792                                bool nowait)
5793 {
5794         struct mwl8k_priv *priv = hw->priv;
5795         int rc;
5796         int count = MAX_RESTART_ATTEMPTS;
5797
5798 retry:
5799         /* Reset firmware and hardware */
5800         mwl8k_hw_reset(priv);
5801
5802         /* Ask userland hotplug daemon for the device firmware */
5803         rc = mwl8k_request_firmware(priv, fw_image, nowait);
5804         if (rc) {
5805                 wiphy_err(hw->wiphy, "Firmware files not found\n");
5806                 return rc;
5807         }
5808
5809         if (nowait)
5810                 return rc;
5811
5812         /* Load firmware into hardware */
5813         rc = mwl8k_load_firmware(hw);
5814         if (rc)
5815                 wiphy_err(hw->wiphy, "Cannot start firmware\n");
5816
5817         /* Reclaim memory once firmware is successfully loaded */
5818         mwl8k_release_firmware(priv);
5819
5820         if (rc && count) {
5821                 /* FW did not start successfully;
5822                  * lets try one more time
5823                  */
5824                 count--;
5825                 wiphy_err(hw->wiphy, "Trying to reload the firmware again\n");
5826                 msleep(20);
5827                 goto retry;
5828         }
5829
5830         return rc;
5831 }
5832
5833 static int mwl8k_init_txqs(struct ieee80211_hw *hw)
5834 {
5835         struct mwl8k_priv *priv = hw->priv;
5836         int rc = 0;
5837         int i;
5838
5839         for (i = 0; i < mwl8k_tx_queues(priv); i++) {
5840                 rc = mwl8k_txq_init(hw, i);
5841                 if (rc)
5842                         break;
5843                 if (priv->ap_fw)
5844                         iowrite32(priv->txq[i].txd_dma,
5845                                   priv->sram + priv->txq_offset[i]);
5846         }
5847         return rc;
5848 }
5849
5850 /* initialize hw after successfully loading a firmware image */
5851 static int mwl8k_probe_hw(struct ieee80211_hw *hw)
5852 {
5853         struct mwl8k_priv *priv = hw->priv;
5854         int rc = 0;
5855         int i;
5856
5857         if (priv->ap_fw) {
5858                 priv->rxd_ops = priv->device_info->ap_rxd_ops;
5859                 if (priv->rxd_ops == NULL) {
5860                         wiphy_err(hw->wiphy,
5861                                   "Driver does not have AP firmware image support for this hardware\n");
5862                         rc = -ENOENT;
5863                         goto err_stop_firmware;
5864                 }
5865         } else {
5866                 priv->rxd_ops = &rxd_sta_ops;
5867         }
5868
5869         priv->sniffer_enabled = false;
5870         priv->wmm_enabled = false;
5871         priv->pending_tx_pkts = 0;
5872         atomic_set(&priv->watchdog_event_pending, 0);
5873
5874         rc = mwl8k_rxq_init(hw, 0);
5875         if (rc)
5876                 goto err_stop_firmware;
5877         rxq_refill(hw, 0, INT_MAX);
5878
5879         /* For the sta firmware, we need to know the dma addresses of tx queues
5880          * before sending MWL8K_CMD_GET_HW_SPEC.  So we must initialize them
5881          * prior to issuing this command.  But for the AP case, we learn the
5882          * total number of queues from the result CMD_GET_HW_SPEC, so for this
5883          * case we must initialize the tx queues after.
5884          */
5885         priv->num_ampdu_queues = 0;
5886         if (!priv->ap_fw) {
5887                 rc = mwl8k_init_txqs(hw);
5888                 if (rc)
5889                         goto err_free_queues;
5890         }
5891
5892         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
5893         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5894         iowrite32(MWL8K_A2H_INT_TX_DONE|MWL8K_A2H_INT_RX_READY|
5895                   MWL8K_A2H_INT_BA_WATCHDOG,
5896                   priv->regs + MWL8K_HIU_A2H_INTERRUPT_CLEAR_SEL);
5897         iowrite32(MWL8K_A2H_INT_OPC_DONE,
5898                   priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
5899
5900         rc = request_irq(priv->pdev->irq, mwl8k_interrupt,
5901                          IRQF_SHARED, MWL8K_NAME, hw);
5902         if (rc) {
5903                 wiphy_err(hw->wiphy, "failed to register IRQ handler\n");
5904                 goto err_free_queues;
5905         }
5906
5907         /*
5908          * When hw restart is requested,
5909          * mac80211 will take care of clearing
5910          * the ampdu streams, so do not clear
5911          * the ampdu state here
5912          */
5913         if (!priv->hw_restart_in_progress)
5914                 memset(priv->ampdu, 0, sizeof(priv->ampdu));
5915
5916         /*
5917          * Temporarily enable interrupts.  Initial firmware host
5918          * commands use interrupts and avoid polling.  Disable
5919          * interrupts when done.
5920          */
5921         iowrite32(MWL8K_A2H_EVENTS, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5922
5923         /* Get config data, mac addrs etc */
5924         if (priv->ap_fw) {
5925                 rc = mwl8k_cmd_get_hw_spec_ap(hw);
5926                 if (!rc)
5927                         rc = mwl8k_init_txqs(hw);
5928                 if (!rc)
5929                         rc = mwl8k_cmd_set_hw_spec(hw);
5930         } else {
5931                 rc = mwl8k_cmd_get_hw_spec_sta(hw);
5932         }
5933         if (rc) {
5934                 wiphy_err(hw->wiphy, "Cannot initialise firmware\n");
5935                 goto err_free_irq;
5936         }
5937
5938         /* Turn radio off */
5939         rc = mwl8k_cmd_radio_disable(hw);
5940         if (rc) {
5941                 wiphy_err(hw->wiphy, "Cannot disable\n");
5942                 goto err_free_irq;
5943         }
5944
5945         /* Clear MAC address */
5946         rc = mwl8k_cmd_set_mac_addr(hw, NULL, "\x00\x00\x00\x00\x00\x00");
5947         if (rc) {
5948                 wiphy_err(hw->wiphy, "Cannot clear MAC address\n");
5949                 goto err_free_irq;
5950         }
5951
5952         /* Configure Antennas */
5953         rc = mwl8k_cmd_rf_antenna(hw, MWL8K_RF_ANTENNA_RX, 0x3);
5954         if (rc)
5955                 wiphy_warn(hw->wiphy, "failed to set # of RX antennas");
5956         rc = mwl8k_cmd_rf_antenna(hw, MWL8K_RF_ANTENNA_TX, 0x7);
5957         if (rc)
5958                 wiphy_warn(hw->wiphy, "failed to set # of TX antennas");
5959
5960
5961         /* Disable interrupts */
5962         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5963         free_irq(priv->pdev->irq, hw);
5964
5965         wiphy_info(hw->wiphy, "%s v%d, %pm, %s firmware %u.%u.%u.%u\n",
5966                    priv->device_info->part_name,
5967                    priv->hw_rev, hw->wiphy->perm_addr,
5968                    priv->ap_fw ? "AP" : "STA",
5969                    (priv->fw_rev >> 24) & 0xff, (priv->fw_rev >> 16) & 0xff,
5970                    (priv->fw_rev >> 8) & 0xff, priv->fw_rev & 0xff);
5971
5972         return 0;
5973
5974 err_free_irq:
5975         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5976         free_irq(priv->pdev->irq, hw);
5977
5978 err_free_queues:
5979         for (i = 0; i < mwl8k_tx_queues(priv); i++)
5980                 mwl8k_txq_deinit(hw, i);
5981         mwl8k_rxq_deinit(hw, 0);
5982
5983 err_stop_firmware:
5984         mwl8k_hw_reset(priv);
5985
5986         return rc;
5987 }
5988
5989 /*
5990  * invoke mwl8k_reload_firmware to change the firmware image after the device
5991  * has already been registered
5992  */
5993 static int mwl8k_reload_firmware(struct ieee80211_hw *hw, char *fw_image)
5994 {
5995         int i, rc = 0;
5996         struct mwl8k_priv *priv = hw->priv;
5997         struct mwl8k_vif *vif, *tmp_vif;
5998
5999         mwl8k_stop(hw);
6000         mwl8k_rxq_deinit(hw, 0);
6001
6002         /*
6003          * All the existing interfaces are re-added by the ieee80211_reconfig;
6004          * which means driver should remove existing interfaces before calling
6005          * ieee80211_restart_hw
6006          */
6007         if (priv->hw_restart_in_progress)
6008                 list_for_each_entry_safe(vif, tmp_vif, &priv->vif_list, list)
6009                         mwl8k_remove_vif(priv, vif);
6010
6011         for (i = 0; i < mwl8k_tx_queues(priv); i++)
6012                 mwl8k_txq_deinit(hw, i);
6013
6014         rc = mwl8k_init_firmware(hw, fw_image, false);
6015         if (rc)
6016                 goto fail;
6017
6018         rc = mwl8k_probe_hw(hw);
6019         if (rc)
6020                 goto fail;
6021
6022         if (priv->hw_restart_in_progress)
6023                 return rc;
6024
6025         rc = mwl8k_start(hw);
6026         if (rc)
6027                 goto fail;
6028
6029         rc = mwl8k_config(hw, ~0);
6030         if (rc)
6031                 goto fail;
6032
6033         for (i = 0; i < MWL8K_TX_WMM_QUEUES; i++) {
6034                 rc = mwl8k_conf_tx(hw, NULL, i, &priv->wmm_params[i]);
6035                 if (rc)
6036                         goto fail;
6037         }
6038
6039         return rc;
6040
6041 fail:
6042         printk(KERN_WARNING "mwl8k: Failed to reload firmware image.\n");
6043         return rc;
6044 }
6045
6046 static const struct ieee80211_iface_limit ap_if_limits[] = {
6047         { .max = 8,     .types = BIT(NL80211_IFTYPE_AP) },
6048         { .max = 1,     .types = BIT(NL80211_IFTYPE_STATION) },
6049 };
6050
6051 static const struct ieee80211_iface_combination ap_if_comb = {
6052         .limits = ap_if_limits,
6053         .n_limits = ARRAY_SIZE(ap_if_limits),
6054         .max_interfaces = 8,
6055         .num_different_channels = 1,
6056 };
6057
6058
6059 static int mwl8k_firmware_load_success(struct mwl8k_priv *priv)
6060 {
6061         struct ieee80211_hw *hw = priv->hw;
6062         int i, rc;
6063
6064         rc = mwl8k_load_firmware(hw);
6065         mwl8k_release_firmware(priv);
6066         if (rc) {
6067                 wiphy_err(hw->wiphy, "Cannot start firmware\n");
6068                 return rc;
6069         }
6070
6071         /*
6072          * Extra headroom is the size of the required DMA header
6073          * minus the size of the smallest 802.11 frame (CTS frame).
6074          */
6075         hw->extra_tx_headroom =
6076                 sizeof(struct mwl8k_dma_data) - sizeof(struct ieee80211_cts);
6077
6078         hw->extra_tx_headroom -= priv->ap_fw ? REDUCED_TX_HEADROOM : 0;
6079
6080         hw->queues = MWL8K_TX_WMM_QUEUES;
6081
6082         /* Set rssi values to dBm */
6083         hw->flags |= IEEE80211_HW_SIGNAL_DBM | IEEE80211_HW_HAS_RATE_CONTROL;
6084
6085         /*
6086          * Ask mac80211 to not to trigger PS mode
6087          * based on PM bit of incoming frames.
6088          */
6089         if (priv->ap_fw)
6090                 hw->flags |= IEEE80211_HW_AP_LINK_PS;
6091
6092         hw->vif_data_size = sizeof(struct mwl8k_vif);
6093         hw->sta_data_size = sizeof(struct mwl8k_sta);
6094
6095         priv->macids_used = 0;
6096         INIT_LIST_HEAD(&priv->vif_list);
6097
6098         /* Set default radio state and preamble */
6099         priv->radio_on = false;
6100         priv->radio_short_preamble = false;
6101
6102         /* Finalize join worker */
6103         INIT_WORK(&priv->finalize_join_worker, mwl8k_finalize_join_worker);
6104         /* Handle watchdog ba events */
6105         INIT_WORK(&priv->watchdog_ba_handle, mwl8k_watchdog_ba_events);
6106         /* To reload the firmware if it crashes */
6107         INIT_WORK(&priv->fw_reload, mwl8k_hw_restart_work);
6108
6109         /* TX reclaim and RX tasklets.  */
6110         tasklet_init(&priv->poll_tx_task, mwl8k_tx_poll, (unsigned long)hw);
6111         tasklet_disable(&priv->poll_tx_task);
6112         tasklet_init(&priv->poll_rx_task, mwl8k_rx_poll, (unsigned long)hw);
6113         tasklet_disable(&priv->poll_rx_task);
6114
6115         /* Power management cookie */
6116         priv->cookie = pci_alloc_consistent(priv->pdev, 4, &priv->cookie_dma);
6117         if (priv->cookie == NULL)
6118                 return -ENOMEM;
6119
6120         mutex_init(&priv->fw_mutex);
6121         priv->fw_mutex_owner = NULL;
6122         priv->fw_mutex_depth = 0;
6123         priv->hostcmd_wait = NULL;
6124
6125         spin_lock_init(&priv->tx_lock);
6126
6127         spin_lock_init(&priv->stream_lock);
6128
6129         priv->tx_wait = NULL;
6130
6131         rc = mwl8k_probe_hw(hw);
6132         if (rc)
6133                 goto err_free_cookie;
6134
6135         hw->wiphy->interface_modes = 0;
6136
6137         if (priv->ap_macids_supported || priv->device_info->fw_image_ap) {
6138                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP);
6139                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_STATION);
6140                 hw->wiphy->iface_combinations = &ap_if_comb;
6141                 hw->wiphy->n_iface_combinations = 1;
6142         }
6143
6144         if (priv->sta_macids_supported || priv->device_info->fw_image_sta)
6145                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_STATION);
6146
6147         rc = ieee80211_register_hw(hw);
6148         if (rc) {
6149                 wiphy_err(hw->wiphy, "Cannot register device\n");
6150                 goto err_unprobe_hw;
6151         }
6152
6153         return 0;
6154
6155 err_unprobe_hw:
6156         for (i = 0; i < mwl8k_tx_queues(priv); i++)
6157                 mwl8k_txq_deinit(hw, i);
6158         mwl8k_rxq_deinit(hw, 0);
6159
6160 err_free_cookie:
6161         if (priv->cookie != NULL)
6162                 pci_free_consistent(priv->pdev, 4,
6163                                 priv->cookie, priv->cookie_dma);
6164
6165         return rc;
6166 }
6167 static int mwl8k_probe(struct pci_dev *pdev,
6168                                  const struct pci_device_id *id)
6169 {
6170         static int printed_version;
6171         struct ieee80211_hw *hw;
6172         struct mwl8k_priv *priv;
6173         struct mwl8k_device_info *di;
6174         int rc;
6175
6176         if (!printed_version) {
6177                 printk(KERN_INFO "%s version %s\n", MWL8K_DESC, MWL8K_VERSION);
6178                 printed_version = 1;
6179         }
6180
6181
6182         rc = pci_enable_device(pdev);
6183         if (rc) {
6184                 printk(KERN_ERR "%s: Cannot enable new PCI device\n",
6185                        MWL8K_NAME);
6186                 return rc;
6187         }
6188
6189         rc = pci_request_regions(pdev, MWL8K_NAME);
6190         if (rc) {
6191                 printk(KERN_ERR "%s: Cannot obtain PCI resources\n",
6192                        MWL8K_NAME);
6193                 goto err_disable_device;
6194         }
6195
6196         pci_set_master(pdev);
6197
6198
6199         hw = ieee80211_alloc_hw(sizeof(*priv), &mwl8k_ops);
6200         if (hw == NULL) {
6201                 printk(KERN_ERR "%s: ieee80211 alloc failed\n", MWL8K_NAME);
6202                 rc = -ENOMEM;
6203                 goto err_free_reg;
6204         }
6205
6206         SET_IEEE80211_DEV(hw, &pdev->dev);
6207         pci_set_drvdata(pdev, hw);
6208
6209         priv = hw->priv;
6210         priv->hw = hw;
6211         priv->pdev = pdev;
6212         priv->device_info = &mwl8k_info_tbl[id->driver_data];
6213
6214         if (id->driver_data == MWL8764)
6215                 priv->is_8764 = true;
6216
6217         priv->sram = pci_iomap(pdev, 0, 0x10000);
6218         if (priv->sram == NULL) {
6219                 wiphy_err(hw->wiphy, "Cannot map device SRAM\n");
6220                 rc = -EIO;
6221                 goto err_iounmap;
6222         }
6223
6224         /*
6225          * If BAR0 is a 32 bit BAR, the register BAR will be BAR1.
6226          * If BAR0 is a 64 bit BAR, the register BAR will be BAR2.
6227          */
6228         priv->regs = pci_iomap(pdev, 1, 0x10000);
6229         if (priv->regs == NULL) {
6230                 priv->regs = pci_iomap(pdev, 2, 0x10000);
6231                 if (priv->regs == NULL) {
6232                         wiphy_err(hw->wiphy, "Cannot map device registers\n");
6233                         rc = -EIO;
6234                         goto err_iounmap;
6235                 }
6236         }
6237
6238         /*
6239          * Choose the initial fw image depending on user input.  If a second
6240          * image is available, make it the alternative image that will be
6241          * loaded if the first one fails.
6242          */
6243         init_completion(&priv->firmware_loading_complete);
6244         di = priv->device_info;
6245         if (ap_mode_default && di->fw_image_ap) {
6246                 priv->fw_pref = di->fw_image_ap;
6247                 priv->fw_alt = di->fw_image_sta;
6248         } else if (!ap_mode_default && di->fw_image_sta) {
6249                 priv->fw_pref = di->fw_image_sta;
6250                 priv->fw_alt = di->fw_image_ap;
6251         } else if (ap_mode_default && !di->fw_image_ap && di->fw_image_sta) {
6252                 printk(KERN_WARNING "AP fw is unavailable.  Using STA fw.");
6253                 priv->fw_pref = di->fw_image_sta;
6254         } else if (!ap_mode_default && !di->fw_image_sta && di->fw_image_ap) {
6255                 printk(KERN_WARNING "STA fw is unavailable.  Using AP fw.");
6256                 priv->fw_pref = di->fw_image_ap;
6257         }
6258         rc = mwl8k_init_firmware(hw, priv->fw_pref, true);
6259         if (rc)
6260                 goto err_stop_firmware;
6261
6262         priv->hw_restart_in_progress = false;
6263
6264         priv->running_bsses = 0;
6265
6266         return rc;
6267
6268 err_stop_firmware:
6269         mwl8k_hw_reset(priv);
6270
6271 err_iounmap:
6272         if (priv->regs != NULL)
6273                 pci_iounmap(pdev, priv->regs);
6274
6275         if (priv->sram != NULL)
6276                 pci_iounmap(pdev, priv->sram);
6277
6278         ieee80211_free_hw(hw);
6279
6280 err_free_reg:
6281         pci_release_regions(pdev);
6282
6283 err_disable_device:
6284         pci_disable_device(pdev);
6285
6286         return rc;
6287 }
6288
6289 static void mwl8k_remove(struct pci_dev *pdev)
6290 {
6291         struct ieee80211_hw *hw = pci_get_drvdata(pdev);
6292         struct mwl8k_priv *priv;
6293         int i;
6294
6295         if (hw == NULL)
6296                 return;
6297         priv = hw->priv;
6298
6299         wait_for_completion(&priv->firmware_loading_complete);
6300
6301         if (priv->fw_state == FW_STATE_ERROR) {
6302                 mwl8k_hw_reset(priv);
6303                 goto unmap;
6304         }
6305
6306         ieee80211_stop_queues(hw);
6307
6308         ieee80211_unregister_hw(hw);
6309
6310         /* Remove TX reclaim and RX tasklets.  */
6311         tasklet_kill(&priv->poll_tx_task);
6312         tasklet_kill(&priv->poll_rx_task);
6313
6314         /* Stop hardware */
6315         mwl8k_hw_reset(priv);
6316
6317         /* Return all skbs to mac80211 */
6318         for (i = 0; i < mwl8k_tx_queues(priv); i++)
6319                 mwl8k_txq_reclaim(hw, i, INT_MAX, 1);
6320
6321         for (i = 0; i < mwl8k_tx_queues(priv); i++)
6322                 mwl8k_txq_deinit(hw, i);
6323
6324         mwl8k_rxq_deinit(hw, 0);
6325
6326         pci_free_consistent(priv->pdev, 4, priv->cookie, priv->cookie_dma);
6327
6328 unmap:
6329         pci_iounmap(pdev, priv->regs);
6330         pci_iounmap(pdev, priv->sram);
6331         ieee80211_free_hw(hw);
6332         pci_release_regions(pdev);
6333         pci_disable_device(pdev);
6334 }
6335
6336 static struct pci_driver mwl8k_driver = {
6337         .name           = MWL8K_NAME,
6338         .id_table       = mwl8k_pci_id_table,
6339         .probe          = mwl8k_probe,
6340         .remove         = mwl8k_remove,
6341 };
6342
6343 module_pci_driver(mwl8k_driver);
6344
6345 MODULE_DESCRIPTION(MWL8K_DESC);
6346 MODULE_VERSION(MWL8K_VERSION);
6347 MODULE_AUTHOR("Lennert Buytenhek <buytenh@marvell.com>");
6348 MODULE_LICENSE("GPL");