drivers/net/wireless/marvell/mwl8k.c

   1 /*
   2  * drivers/net/wireless/mwl8k.c
   3  * Driver for Marvell TOPDOG 802.11 Wireless cards
   4  *
   5  * Copyright (C) 2008, 2009, 2010 Marvell Semiconductor Inc.
   6  *
   7  * This file is licensed under the terms of the GNU General Public
   8  * License version 2.  This program is licensed "as is" without any
   9  * warranty of any kind, whether express or implied.
  10  */
  11
  12 #include <linux/interrupt.h>
  13 #include <linux/module.h>
  14 #include <linux/kernel.h>
  15 #include <linux/sched.h>
  16 #include <linux/spinlock.h>
  17 #include <linux/list.h>
  18 #include <linux/pci.h>
  19 #include <linux/delay.h>
  20 #include <linux/completion.h>
  21 #include <linux/etherdevice.h>
  22 #include <linux/slab.h>
  23 #include <net/mac80211.h>
  24 #include <linux/moduleparam.h>
  25 #include <linux/firmware.h>
  26 #include <linux/workqueue.h>
  27
  28 #define MWL8K_DESC      "Marvell TOPDOG(R) 802.11 Wireless Network Driver"
  29 #define MWL8K_NAME      KBUILD_MODNAME
  30 #define MWL8K_VERSION   "0.13"
  31
  32 /* Module parameters */
  33 static bool ap_mode_default;
  34 module_param(ap_mode_default, bool, 0);
  35 MODULE_PARM_DESC(ap_mode_default,
  36                  "Set to 1 to make ap mode the default instead of sta mode");
  37
  38 /* Register definitions */
  39 #define MWL8K_HIU_GEN_PTR                       0x00000c10
  40 #define  MWL8K_MODE_STA                          0x0000005a
  41 #define  MWL8K_MODE_AP                           0x000000a5
  42 #define MWL8K_HIU_INT_CODE                      0x00000c14
  43 #define  MWL8K_FWSTA_READY                       0xf0f1f2f4
  44 #define  MWL8K_FWAP_READY                        0xf1f2f4a5
  45 #define  MWL8K_INT_CODE_CMD_FINISHED             0x00000005
  46 #define MWL8K_HIU_SCRATCH                       0x00000c40
  47
  48 /* Host->device communications */
  49 #define MWL8K_HIU_H2A_INTERRUPT_EVENTS          0x00000c18
  50 #define MWL8K_HIU_H2A_INTERRUPT_STATUS          0x00000c1c
  51 #define MWL8K_HIU_H2A_INTERRUPT_MASK            0x00000c20
  52 #define MWL8K_HIU_H2A_INTERRUPT_CLEAR_SEL       0x00000c24
  53 #define MWL8K_HIU_H2A_INTERRUPT_STATUS_MASK     0x00000c28
  54 #define  MWL8K_H2A_INT_DUMMY                     (1 << 20)
  55 #define  MWL8K_H2A_INT_RESET                     (1 << 15)
  56 #define  MWL8K_H2A_INT_DOORBELL                  (1 << 1)
  57 #define  MWL8K_H2A_INT_PPA_READY                 (1 << 0)
  58
  59 /* Device->host communications */
  60 #define MWL8K_HIU_A2H_INTERRUPT_EVENTS          0x00000c2c
  61 #define MWL8K_HIU_A2H_INTERRUPT_STATUS          0x00000c30
  62 #define MWL8K_HIU_A2H_INTERRUPT_MASK            0x00000c34
  63 #define MWL8K_HIU_A2H_INTERRUPT_CLEAR_SEL       0x00000c38
  64 #define MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK     0x00000c3c
  65 #define  MWL8K_A2H_INT_DUMMY                     (1 << 20)
  66 #define  MWL8K_A2H_INT_BA_WATCHDOG               (1 << 14)
  67 #define  MWL8K_A2H_INT_CHNL_SWITCHED             (1 << 11)
  68 #define  MWL8K_A2H_INT_QUEUE_EMPTY               (1 << 10)
  69 #define  MWL8K_A2H_INT_RADAR_DETECT              (1 << 7)
  70 #define  MWL8K_A2H_INT_RADIO_ON                  (1 << 6)
  71 #define  MWL8K_A2H_INT_RADIO_OFF                 (1 << 5)
  72 #define  MWL8K_A2H_INT_MAC_EVENT                 (1 << 3)
  73 #define  MWL8K_A2H_INT_OPC_DONE                  (1 << 2)
  74 #define  MWL8K_A2H_INT_RX_READY                  (1 << 1)
  75 #define  MWL8K_A2H_INT_TX_DONE                   (1 << 0)
  76
  77 /* HW micro second timer register
  78  * located at offset 0xA600. This
  79  * will be used to timestamp tx
  80  * packets.
  81  */
  82
  83 #define MWL8K_HW_TIMER_REGISTER                 0x0000a600
  84 #define BBU_RXRDY_CNT_REG                       0x0000a860
  85 #define NOK_CCA_CNT_REG                         0x0000a6a0
  86 #define BBU_AVG_NOISE_VAL                       0x67
  87
  88 #define MWL8K_A2H_EVENTS        (MWL8K_A2H_INT_DUMMY | \
  89                                  MWL8K_A2H_INT_CHNL_SWITCHED | \
  90                                  MWL8K_A2H_INT_QUEUE_EMPTY | \
  91                                  MWL8K_A2H_INT_RADAR_DETECT | \
  92                                  MWL8K_A2H_INT_RADIO_ON | \
  93                                  MWL8K_A2H_INT_RADIO_OFF | \
  94                                  MWL8K_A2H_INT_MAC_EVENT | \
  95                                  MWL8K_A2H_INT_OPC_DONE | \
  96                                  MWL8K_A2H_INT_RX_READY | \
  97                                  MWL8K_A2H_INT_TX_DONE | \
  98                                  MWL8K_A2H_INT_BA_WATCHDOG)
  99
 100 #define MWL8K_RX_QUEUES         1
 101 #define MWL8K_TX_WMM_QUEUES     4
 102 #define MWL8K_MAX_AMPDU_QUEUES  8
 103 #define MWL8K_MAX_TX_QUEUES     (MWL8K_TX_WMM_QUEUES + MWL8K_MAX_AMPDU_QUEUES)
 104 #define mwl8k_tx_queues(priv)   (MWL8K_TX_WMM_QUEUES + (priv)->num_ampdu_queues)
 105
 106 /* txpriorities are mapped with hw queues.
 107  * Each hw queue has a txpriority.
 108  */
 109 #define TOTAL_HW_TX_QUEUES      8
 110
 111 /* Each HW queue can have one AMPDU stream.
 112  * But, because one of the hw queue is reserved,
 113  * maximum AMPDU queues that can be created are
 114  * one short of total tx queues.
 115  */
 116 #define MWL8K_NUM_AMPDU_STREAMS (TOTAL_HW_TX_QUEUES - 1)
 117
 118 #define MWL8K_NUM_CHANS 18
 119
 120 struct rxd_ops {
 121         int rxd_size;
 122         void (*rxd_init)(void *rxd, dma_addr_t next_dma_addr);
 123         void (*rxd_refill)(void *rxd, dma_addr_t addr, int len);
 124         int (*rxd_process)(void *rxd, struct ieee80211_rx_status *status,
 125                            __le16 *qos, s8 *noise);
 126 };
 127
 128 struct mwl8k_device_info {
 129         char *part_name;
 130         char *helper_image;
 131         char *fw_image_sta;
 132         char *fw_image_ap;
 133         struct rxd_ops *ap_rxd_ops;
 134         u32 fw_api_ap;
 135 };
 136
 137 struct mwl8k_rx_queue {
 138         int rxd_count;
 139
 140         /* hw receives here */
 141         int head;
 142
 143         /* refill descs here */
 144         int tail;
 145
 146         void *rxd;
 147         dma_addr_t rxd_dma;
 148         struct {
 149                 struct sk_buff *skb;
 150                 DEFINE_DMA_UNMAP_ADDR(dma);
 151         } *buf;
 152 };
 153
 154 struct mwl8k_tx_queue {
 155         /* hw transmits here */
 156         int head;
 157
 158         /* sw appends here */
 159         int tail;
 160
 161         unsigned int len;
 162         struct mwl8k_tx_desc *txd;
 163         dma_addr_t txd_dma;
 164         struct sk_buff **skb;
 165 };
 166
 167 enum {
 168         AMPDU_NO_STREAM,
 169         AMPDU_STREAM_NEW,
 170         AMPDU_STREAM_IN_PROGRESS,
 171         AMPDU_STREAM_ACTIVE,
 172 };
 173
 174 struct mwl8k_ampdu_stream {
 175         struct ieee80211_sta *sta;
 176         u8 tid;
 177         u8 state;
 178         u8 idx;
 179 };
 180
 181 struct mwl8k_priv {
 182         struct ieee80211_hw *hw;
 183         struct pci_dev *pdev;
 184         int irq;
 185
 186         struct mwl8k_device_info *device_info;
 187
 188         void __iomem *sram;
 189         void __iomem *regs;
 190
 191         /* firmware */
 192         const struct firmware *fw_helper;
 193         const struct firmware *fw_ucode;
 194
 195         /* hardware/firmware parameters */
 196         bool ap_fw;
 197         struct rxd_ops *rxd_ops;
 198         struct ieee80211_supported_band band_24;
 199         struct ieee80211_channel channels_24[14];
 200         struct ieee80211_rate rates_24[13];
 201         struct ieee80211_supported_band band_50;
 202         struct ieee80211_channel channels_50[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 = NL80211_BAND_2GHZ, .center_freq = 2412, .hw_value = 1, },
 350         { .band = NL80211_BAND_2GHZ, .center_freq = 2417, .hw_value = 2, },
 351         { .band = NL80211_BAND_2GHZ, .center_freq = 2422, .hw_value = 3, },
 352         { .band = NL80211_BAND_2GHZ, .center_freq = 2427, .hw_value = 4, },
 353         { .band = NL80211_BAND_2GHZ, .center_freq = 2432, .hw_value = 5, },
 354         { .band = NL80211_BAND_2GHZ, .center_freq = 2437, .hw_value = 6, },
 355         { .band = NL80211_BAND_2GHZ, .center_freq = 2442, .hw_value = 7, },
 356         { .band = NL80211_BAND_2GHZ, .center_freq = 2447, .hw_value = 8, },
 357         { .band = NL80211_BAND_2GHZ, .center_freq = 2452, .hw_value = 9, },
 358         { .band = NL80211_BAND_2GHZ, .center_freq = 2457, .hw_value = 10, },
 359         { .band = NL80211_BAND_2GHZ, .center_freq = 2462, .hw_value = 11, },
 360         { .band = NL80211_BAND_2GHZ, .center_freq = 2467, .hw_value = 12, },
 361         { .band = NL80211_BAND_2GHZ, .center_freq = 2472, .hw_value = 13, },
 362         { .band = NL80211_BAND_2GHZ, .center_freq = 2484, .hw_value = 14, },
 363 };
 364
 365 static const struct ieee80211_rate mwl8k_rates_24[] = {
 366         { .bitrate = 10, .hw_value = 2, },
 367         { .bitrate = 20, .hw_value = 4, },
 368         { .bitrate = 55, .hw_value = 11, },
 369         { .bitrate = 110, .hw_value = 22, },
 370         { .bitrate = 220, .hw_value = 44, },
 371         { .bitrate = 60, .hw_value = 12, },
 372         { .bitrate = 90, .hw_value = 18, },
 373         { .bitrate = 120, .hw_value = 24, },
 374         { .bitrate = 180, .hw_value = 36, },
 375         { .bitrate = 240, .hw_value = 48, },
 376         { .bitrate = 360, .hw_value = 72, },
 377         { .bitrate = 480, .hw_value = 96, },
 378         { .bitrate = 540, .hw_value = 108, },
 379 };
 380
 381 static const struct ieee80211_channel mwl8k_channels_50[] = {
 382         { .band = NL80211_BAND_5GHZ, .center_freq = 5180, .hw_value = 36, },
 383         { .band = NL80211_BAND_5GHZ, .center_freq = 5200, .hw_value = 40, },
 384         { .band = NL80211_BAND_5GHZ, .center_freq = 5220, .hw_value = 44, },
 385         { .band = NL80211_BAND_5GHZ, .center_freq = 5240, .hw_value = 48, },
 386 };
 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 reject_firmware_nowait(THIS_MODULE, 1, fname,
 532                                                &priv->pdev->dev, GFP_KERNEL,
 533                                                priv, mwl8k_fw_state_machine);
 534         else
 535                 return reject_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 = NL80211_BAND_5GHZ;
1014                 if (!(status->flag & RX_FLAG_HT))
1015                         status->rate_idx -= 5;
1016         } else {
1017                 status->band = NL80211_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 = NL80211_BAND_5GHZ;
1122                 if (!(status->flag & RX_FLAG_HT))
1123                         status->rate_idx -= 5;
1124         } else {
1125                 status->band = NL80211_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_zalloc_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
1168         rxq->buf = kcalloc(MWL8K_RX_DESCS, sizeof(*rxq->buf), GFP_KERNEL);
1169         if (rxq->buf == NULL) {
1170                 pci_free_consistent(priv->pdev, size, rxq->rxd, rxq->rxd_dma);
1171                 return -ENOMEM;
1172         }
1173
1174         for (i = 0; i < MWL8K_RX_DESCS; i++) {
1175                 int desc_size;
1176                 void *rxd;
1177                 int nexti;
1178                 dma_addr_t next_dma_addr;
1179
1180                 desc_size = priv->rxd_ops->rxd_size;
1181                 rxd = rxq->rxd + (i * priv->rxd_ops->rxd_size);
1182
1183                 nexti = i + 1;
1184                 if (nexti == MWL8K_RX_DESCS)
1185                         nexti = 0;
1186                 next_dma_addr = rxq->rxd_dma + (nexti * desc_size);
1187
1188                 priv->rxd_ops->rxd_init(rxd, next_dma_addr);
1189         }
1190
1191         return 0;
1192 }
1193
1194 static int rxq_refill(struct ieee80211_hw *hw, int index, int limit)
1195 {
1196         struct mwl8k_priv *priv = hw->priv;
1197         struct mwl8k_rx_queue *rxq = priv->rxq + index;
1198         int refilled;
1199
1200         refilled = 0;
1201         while (rxq->rxd_count < MWL8K_RX_DESCS && limit--) {
1202                 struct sk_buff *skb;
1203                 dma_addr_t addr;
1204                 int rx;
1205                 void *rxd;
1206
1207                 skb = dev_alloc_skb(MWL8K_RX_MAXSZ);
1208                 if (skb == NULL)
1209                         break;
1210
1211                 addr = pci_map_single(priv->pdev, skb->data,
1212                                       MWL8K_RX_MAXSZ, DMA_FROM_DEVICE);
1213
1214                 rxq->rxd_count++;
1215                 rx = rxq->tail++;
1216                 if (rxq->tail == MWL8K_RX_DESCS)
1217                         rxq->tail = 0;
1218                 rxq->buf[rx].skb = skb;
1219                 dma_unmap_addr_set(&rxq->buf[rx], dma, addr);
1220
1221                 rxd = rxq->rxd + (rx * priv->rxd_ops->rxd_size);
1222                 priv->rxd_ops->rxd_refill(rxd, addr, MWL8K_RX_MAXSZ);
1223
1224                 refilled++;
1225         }
1226
1227         return refilled;
1228 }
1229
1230 /* Must be called only when the card's reception is completely halted */
1231 static void mwl8k_rxq_deinit(struct ieee80211_hw *hw, int index)
1232 {
1233         struct mwl8k_priv *priv = hw->priv;
1234         struct mwl8k_rx_queue *rxq = priv->rxq + index;
1235         int i;
1236
1237         if (rxq->rxd == NULL)
1238                 return;
1239
1240         for (i = 0; i < MWL8K_RX_DESCS; i++) {
1241                 if (rxq->buf[i].skb != NULL) {
1242                         pci_unmap_single(priv->pdev,
1243                                          dma_unmap_addr(&rxq->buf[i], dma),
1244                                          MWL8K_RX_MAXSZ, PCI_DMA_FROMDEVICE);
1245                         dma_unmap_addr_set(&rxq->buf[i], dma, 0);
1246
1247                         kfree_skb(rxq->buf[i].skb);
1248                         rxq->buf[i].skb = NULL;
1249                 }
1250         }
1251
1252         kfree(rxq->buf);
1253         rxq->buf = NULL;
1254
1255         pci_free_consistent(priv->pdev,
1256                             MWL8K_RX_DESCS * priv->rxd_ops->rxd_size,
1257                             rxq->rxd, rxq->rxd_dma);
1258         rxq->rxd = NULL;
1259 }
1260
1261
1262 /*
1263  * Scan a list of BSSIDs to process for finalize join.
1264  * Allows for extension to process multiple BSSIDs.
1265  */
1266 static inline int
1267 mwl8k_capture_bssid(struct mwl8k_priv *priv, struct ieee80211_hdr *wh)
1268 {
1269         return priv->capture_beacon &&
1270                 ieee80211_is_beacon(wh->frame_control) &&
1271                 ether_addr_equal_64bits(wh->addr3, priv->capture_bssid);
1272 }
1273
1274 static inline void mwl8k_save_beacon(struct ieee80211_hw *hw,
1275                                      struct sk_buff *skb)
1276 {
1277         struct mwl8k_priv *priv = hw->priv;
1278
1279         priv->capture_beacon = false;
1280         eth_zero_addr(priv->capture_bssid);
1281
1282         /*
1283          * Use GFP_ATOMIC as rxq_process is called from
1284          * the primary interrupt handler, memory allocation call
1285          * must not sleep.
1286          */
1287         priv->beacon_skb = skb_copy(skb, GFP_ATOMIC);
1288         if (priv->beacon_skb != NULL)
1289                 ieee80211_queue_work(hw, &priv->finalize_join_worker);
1290 }
1291
1292 static inline struct mwl8k_vif *mwl8k_find_vif_bss(struct list_head *vif_list,
1293                                                    u8 *bssid)
1294 {
1295         struct mwl8k_vif *mwl8k_vif;
1296
1297         list_for_each_entry(mwl8k_vif,
1298                             vif_list, list) {
1299                 if (memcmp(bssid, mwl8k_vif->bssid,
1300                            ETH_ALEN) == 0)
1301                         return mwl8k_vif;
1302         }
1303
1304         return NULL;
1305 }
1306
1307 static int rxq_process(struct ieee80211_hw *hw, int index, int limit)
1308 {
1309         struct mwl8k_priv *priv = hw->priv;
1310         struct mwl8k_vif *mwl8k_vif = NULL;
1311         struct mwl8k_rx_queue *rxq = priv->rxq + index;
1312         int processed;
1313
1314         processed = 0;
1315         while (rxq->rxd_count && limit--) {
1316                 struct sk_buff *skb;
1317                 void *rxd;
1318                 int pkt_len;
1319                 struct ieee80211_rx_status status;
1320                 struct ieee80211_hdr *wh;
1321                 __le16 qos;
1322
1323                 skb = rxq->buf[rxq->head].skb;
1324                 if (skb == NULL)
1325                         break;
1326
1327                 rxd = rxq->rxd + (rxq->head * priv->rxd_ops->rxd_size);
1328
1329                 pkt_len = priv->rxd_ops->rxd_process(rxd, &status, &qos,
1330                                                         &priv->noise);
1331                 if (pkt_len < 0)
1332                         break;
1333
1334                 rxq->buf[rxq->head].skb = NULL;
1335
1336                 pci_unmap_single(priv->pdev,
1337                                  dma_unmap_addr(&rxq->buf[rxq->head], dma),
1338                                  MWL8K_RX_MAXSZ, PCI_DMA_FROMDEVICE);
1339                 dma_unmap_addr_set(&rxq->buf[rxq->head], dma, 0);
1340
1341                 rxq->head++;
1342                 if (rxq->head == MWL8K_RX_DESCS)
1343                         rxq->head = 0;
1344
1345                 rxq->rxd_count--;
1346
1347                 wh = &((struct mwl8k_dma_data *)skb->data)->wh;
1348
1349                 /*
1350                  * Check for a pending join operation.  Save a
1351                  * copy of the beacon and schedule a tasklet to
1352                  * send a FINALIZE_JOIN command to the firmware.
1353                  */
1354                 if (mwl8k_capture_bssid(priv, (void *)skb->data))
1355                         mwl8k_save_beacon(hw, skb);
1356
1357                 if (ieee80211_has_protected(wh->frame_control)) {
1358
1359                         /* Check if hw crypto has been enabled for
1360                          * this bss. If yes, set the status flags
1361                          * accordingly
1362                          */
1363                         mwl8k_vif = mwl8k_find_vif_bss(&priv->vif_list,
1364                                                                 wh->addr1);
1365
1366                         if (mwl8k_vif != NULL &&
1367                             mwl8k_vif->is_hw_crypto_enabled) {
1368                                 /*
1369                                  * When MMIC ERROR is encountered
1370                                  * by the firmware, payload is
1371                                  * dropped and only 32 bytes of
1372                                  * mwl8k Firmware header is sent
1373                                  * to the host.
1374                                  *
1375                                  * We need to add four bytes of
1376                                  * key information.  In it
1377                                  * MAC80211 expects keyidx set to
1378                                  * 0 for triggering Counter
1379                                  * Measure of MMIC failure.
1380                                  */
1381                                 if (status.flag & RX_FLAG_MMIC_ERROR) {
1382                                         struct mwl8k_dma_data *tr;
1383                                         tr = (struct mwl8k_dma_data *)skb->data;
1384                                         memset((void *)&(tr->data), 0, 4);
1385                                         pkt_len += 4;
1386                                 }
1387
1388                                 if (!ieee80211_is_auth(wh->frame_control))
1389                                         status.flag |= RX_FLAG_IV_STRIPPED |
1390                                                        RX_FLAG_DECRYPTED |
1391                                                        RX_FLAG_MMIC_STRIPPED;
1392                         }
1393                 }
1394
1395                 skb_put(skb, pkt_len);
1396                 mwl8k_remove_dma_header(skb, qos);
1397                 memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
1398                 ieee80211_rx_irqsafe(hw, skb);
1399
1400                 processed++;
1401         }
1402
1403         return processed;
1404 }
1405
1406
1407 /*
1408  * Packet transmission.
1409  */
1410
1411 #define MWL8K_TXD_STATUS_OK                     0x00000001
1412 #define MWL8K_TXD_STATUS_OK_RETRY               0x00000002
1413 #define MWL8K_TXD_STATUS_OK_MORE_RETRY          0x00000004
1414 #define MWL8K_TXD_STATUS_MULTICAST_TX           0x00000008
1415 #define MWL8K_TXD_STATUS_FW_OWNED               0x80000000
1416
1417 #define MWL8K_QOS_QLEN_UNSPEC                   0xff00
1418 #define MWL8K_QOS_ACK_POLICY_MASK               0x0060
1419 #define MWL8K_QOS_ACK_POLICY_NORMAL             0x0000
1420 #define MWL8K_QOS_ACK_POLICY_BLOCKACK           0x0060
1421 #define MWL8K_QOS_EOSP                          0x0010
1422
1423 struct mwl8k_tx_desc {
1424         __le32 status;
1425         __u8 data_rate;
1426         __u8 tx_priority;
1427         __le16 qos_control;
1428         __le32 pkt_phys_addr;
1429         __le16 pkt_len;
1430         __u8 dest_MAC_addr[ETH_ALEN];
1431         __le32 next_txd_phys_addr;
1432         __le32 timestamp;
1433         __le16 rate_info;
1434         __u8 peer_id;
1435         __u8 tx_frag_cnt;
1436 } __packed;
1437
1438 #define MWL8K_TX_DESCS          128
1439
1440 static int mwl8k_txq_init(struct ieee80211_hw *hw, int index)
1441 {
1442         struct mwl8k_priv *priv = hw->priv;
1443         struct mwl8k_tx_queue *txq = priv->txq + index;
1444         int size;
1445         int i;
1446
1447         txq->len = 0;
1448         txq->head = 0;
1449         txq->tail = 0;
1450
1451         size = MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc);
1452
1453         txq->txd = pci_zalloc_consistent(priv->pdev, size, &txq->txd_dma);
1454         if (txq->txd == NULL) {
1455                 wiphy_err(hw->wiphy, "failed to alloc TX descriptors\n");
1456                 return -ENOMEM;
1457         }
1458
1459         txq->skb = kcalloc(MWL8K_TX_DESCS, sizeof(*txq->skb), GFP_KERNEL);
1460         if (txq->skb == NULL) {
1461                 pci_free_consistent(priv->pdev, size, txq->txd, txq->txd_dma);
1462                 txq->txd = NULL;
1463                 return -ENOMEM;
1464         }
1465
1466         for (i = 0; i < MWL8K_TX_DESCS; i++) {
1467                 struct mwl8k_tx_desc *tx_desc;
1468                 int nexti;
1469
1470                 tx_desc = txq->txd + i;
1471                 nexti = (i + 1) % MWL8K_TX_DESCS;
1472
1473                 tx_desc->status = 0;
1474                 tx_desc->next_txd_phys_addr =
1475                         cpu_to_le32(txq->txd_dma + nexti * sizeof(*tx_desc));
1476         }
1477
1478         return 0;
1479 }
1480
1481 static inline void mwl8k_tx_start(struct mwl8k_priv *priv)
1482 {
1483         iowrite32(MWL8K_H2A_INT_PPA_READY,
1484                 priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
1485         iowrite32(MWL8K_H2A_INT_DUMMY,
1486                 priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
1487         ioread32(priv->regs + MWL8K_HIU_INT_CODE);
1488 }
1489
1490 static void mwl8k_dump_tx_rings(struct ieee80211_hw *hw)
1491 {
1492         struct mwl8k_priv *priv = hw->priv;
1493         int i;
1494
1495         for (i = 0; i < mwl8k_tx_queues(priv); i++) {
1496                 struct mwl8k_tx_queue *txq = priv->txq + i;
1497                 int fw_owned = 0;
1498                 int drv_owned = 0;
1499                 int unused = 0;
1500                 int desc;
1501
1502                 for (desc = 0; desc < MWL8K_TX_DESCS; desc++) {
1503                         struct mwl8k_tx_desc *tx_desc = txq->txd + desc;
1504                         u32 status;
1505
1506                         status = le32_to_cpu(tx_desc->status);
1507                         if (status & MWL8K_TXD_STATUS_FW_OWNED)
1508                                 fw_owned++;
1509                         else
1510                                 drv_owned++;
1511
1512                         if (tx_desc->pkt_len == 0)
1513                                 unused++;
1514                 }
1515
1516                 wiphy_err(hw->wiphy,
1517                           "txq[%d] len=%d head=%d tail=%d "
1518                           "fw_owned=%d drv_owned=%d unused=%d\n",
1519                           i,
1520                           txq->len, txq->head, txq->tail,
1521                           fw_owned, drv_owned, unused);
1522         }
1523 }
1524
1525 /*
1526  * Must be called with priv->fw_mutex held and tx queues stopped.
1527  */
1528 #define MWL8K_TX_WAIT_TIMEOUT_MS        5000
1529
1530 static int mwl8k_tx_wait_empty(struct ieee80211_hw *hw)
1531 {
1532         struct mwl8k_priv *priv = hw->priv;
1533         DECLARE_COMPLETION_ONSTACK(tx_wait);
1534         int retry;
1535         int rc;
1536
1537         might_sleep();
1538
1539         /* Since fw restart is in progress, allow only the firmware
1540          * commands from the restart code and block the other
1541          * commands since they are going to fail in any case since
1542          * the firmware has crashed
1543          */
1544         if (priv->hw_restart_in_progress) {
1545                 if (priv->hw_restart_owner == current)
1546                         return 0;
1547                 else
1548                         return -EBUSY;
1549         }
1550
1551         if (atomic_read(&priv->watchdog_event_pending))
1552                 return 0;
1553
1554         /*
1555          * The TX queues are stopped at this point, so this test
1556          * doesn't need to take ->tx_lock.
1557          */
1558         if (!priv->pending_tx_pkts)
1559                 return 0;
1560
1561         retry = 1;
1562         rc = 0;
1563
1564         spin_lock_bh(&priv->tx_lock);
1565         priv->tx_wait = &tx_wait;
1566         while (!rc) {
1567                 int oldcount;
1568                 unsigned long timeout;
1569
1570                 oldcount = priv->pending_tx_pkts;
1571
1572                 spin_unlock_bh(&priv->tx_lock);
1573                 timeout = wait_for_completion_timeout(&tx_wait,
1574                             msecs_to_jiffies(MWL8K_TX_WAIT_TIMEOUT_MS));
1575
1576                 if (atomic_read(&priv->watchdog_event_pending)) {
1577                         spin_lock_bh(&priv->tx_lock);
1578                         priv->tx_wait = NULL;
1579                         spin_unlock_bh(&priv->tx_lock);
1580                         return 0;
1581                 }
1582
1583                 spin_lock_bh(&priv->tx_lock);
1584
1585                 if (timeout || !priv->pending_tx_pkts) {
1586                         WARN_ON(priv->pending_tx_pkts);
1587                         if (retry)
1588                                 wiphy_notice(hw->wiphy, "tx rings drained\n");
1589                         break;
1590                 }
1591
1592                 if (retry) {
1593                         mwl8k_tx_start(priv);
1594                         retry = 0;
1595                         continue;
1596                 }
1597
1598                 if (priv->pending_tx_pkts < oldcount) {
1599                         wiphy_notice(hw->wiphy,
1600                                      "waiting for tx rings to drain (%d -> %d pkts)\n",
1601                                      oldcount, priv->pending_tx_pkts);
1602                         retry = 1;
1603                         continue;
1604                 }
1605
1606                 priv->tx_wait = NULL;
1607
1608                 wiphy_err(hw->wiphy, "tx rings stuck for %d ms\n",
1609                           MWL8K_TX_WAIT_TIMEOUT_MS);
1610                 mwl8k_dump_tx_rings(hw);
1611                 priv->hw_restart_in_progress = true;
1612                 ieee80211_queue_work(hw, &priv->fw_reload);
1613
1614                 rc = -ETIMEDOUT;
1615         }
1616         priv->tx_wait = NULL;
1617         spin_unlock_bh(&priv->tx_lock);
1618
1619         return rc;
1620 }
1621
1622 #define MWL8K_TXD_SUCCESS(status)                               \
1623         ((status) & (MWL8K_TXD_STATUS_OK |                      \
1624                      MWL8K_TXD_STATUS_OK_RETRY |                \
1625                      MWL8K_TXD_STATUS_OK_MORE_RETRY))
1626
1627 static int mwl8k_tid_queue_mapping(u8 tid)
1628 {
1629         BUG_ON(tid > 7);
1630
1631         switch (tid) {
1632         case 0:
1633         case 3:
1634                 return IEEE80211_AC_BE;
1635         case 1:
1636         case 2:
1637                 return IEEE80211_AC_BK;
1638         case 4:
1639         case 5:
1640                 return IEEE80211_AC_VI;
1641         case 6:
1642         case 7:
1643                 return IEEE80211_AC_VO;
1644         default:
1645                 return -1;
1646         }
1647 }
1648
1649 /* The firmware will fill in the rate information
1650  * for each packet that gets queued in the hardware
1651  * and these macros will interpret that info.
1652  */
1653
1654 #define RI_FORMAT(a)              (a & 0x0001)
1655 #define RI_RATE_ID_MCS(a)        ((a & 0x01f8) >> 3)
1656
1657 static int
1658 mwl8k_txq_reclaim(struct ieee80211_hw *hw, int index, int limit, int force)
1659 {
1660         struct mwl8k_priv *priv = hw->priv;
1661         struct mwl8k_tx_queue *txq = priv->txq + index;
1662         int processed;
1663
1664         processed = 0;
1665         while (txq->len > 0 && limit--) {
1666                 int tx;
1667                 struct mwl8k_tx_desc *tx_desc;
1668                 unsigned long addr;
1669                 int size;
1670                 struct sk_buff *skb;
1671                 struct ieee80211_tx_info *info;
1672                 u32 status;
1673                 struct ieee80211_sta *sta;
1674                 struct mwl8k_sta *sta_info = NULL;
1675                 u16 rate_info;
1676                 struct ieee80211_hdr *wh;
1677
1678                 tx = txq->head;
1679                 tx_desc = txq->txd + tx;
1680
1681                 status = le32_to_cpu(tx_desc->status);
1682
1683                 if (status & MWL8K_TXD_STATUS_FW_OWNED) {
1684                         if (!force)
1685                                 break;
1686                         tx_desc->status &=
1687                                 ~cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED);
1688                 }
1689
1690                 txq->head = (tx + 1) % MWL8K_TX_DESCS;
1691                 BUG_ON(txq->len == 0);
1692                 txq->len--;
1693                 priv->pending_tx_pkts--;
1694
1695                 addr = le32_to_cpu(tx_desc->pkt_phys_addr);
1696                 size = le16_to_cpu(tx_desc->pkt_len);
1697                 skb = txq->skb[tx];
1698                 txq->skb[tx] = NULL;
1699
1700                 BUG_ON(skb == NULL);
1701                 pci_unmap_single(priv->pdev, addr, size, PCI_DMA_TODEVICE);
1702
1703                 mwl8k_remove_dma_header(skb, tx_desc->qos_control);
1704
1705                 wh = (struct ieee80211_hdr *) skb->data;
1706
1707                 /* Mark descriptor as unused */
1708                 tx_desc->pkt_phys_addr = 0;
1709                 tx_desc->pkt_len = 0;
1710
1711                 info = IEEE80211_SKB_CB(skb);
1712                 if (ieee80211_is_data(wh->frame_control)) {
1713                         rcu_read_lock();
1714                         sta = ieee80211_find_sta_by_ifaddr(hw, wh->addr1,
1715                                                            wh->addr2);
1716                         if (sta) {
1717                                 sta_info = MWL8K_STA(sta);
1718                                 BUG_ON(sta_info == NULL);
1719                                 rate_info = le16_to_cpu(tx_desc->rate_info);
1720                                 /* If rate is < 6.5 Mpbs for an ht station
1721                                  * do not form an ampdu. If the station is a
1722                                  * legacy station (format = 0), do not form an
1723                                  * ampdu
1724                                  */
1725                                 if (RI_RATE_ID_MCS(rate_info) < 1 ||
1726                                     RI_FORMAT(rate_info) == 0) {
1727                                         sta_info->is_ampdu_allowed = false;
1728                                 } else {
1729                                         sta_info->is_ampdu_allowed = true;
1730                                 }
1731                         }
1732                         rcu_read_unlock();
1733                 }
1734
1735                 ieee80211_tx_info_clear_status(info);
1736
1737                 /* Rate control is happening in the firmware.
1738                  * Ensure no tx rate is being reported.
1739                  */
1740                 info->status.rates[0].idx = -1;
1741                 info->status.rates[0].count = 1;
1742
1743                 if (MWL8K_TXD_SUCCESS(status))
1744                         info->flags |= IEEE80211_TX_STAT_ACK;
1745
1746                 ieee80211_tx_status_irqsafe(hw, skb);
1747
1748                 processed++;
1749         }
1750
1751         return processed;
1752 }
1753
1754 /* must be called only when the card's transmit is completely halted */
1755 static void mwl8k_txq_deinit(struct ieee80211_hw *hw, int index)
1756 {
1757         struct mwl8k_priv *priv = hw->priv;
1758         struct mwl8k_tx_queue *txq = priv->txq + index;
1759
1760         if (txq->txd == NULL)
1761                 return;
1762
1763         mwl8k_txq_reclaim(hw, index, INT_MAX, 1);
1764
1765         kfree(txq->skb);
1766         txq->skb = NULL;
1767
1768         pci_free_consistent(priv->pdev,
1769                             MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc),
1770                             txq->txd, txq->txd_dma);
1771         txq->txd = NULL;
1772 }
1773
1774 /* caller must hold priv->stream_lock when calling the stream functions */
1775 static struct mwl8k_ampdu_stream *
1776 mwl8k_add_stream(struct ieee80211_hw *hw, struct ieee80211_sta *sta, u8 tid)
1777 {
1778         struct mwl8k_ampdu_stream *stream;
1779         struct mwl8k_priv *priv = hw->priv;
1780         int i;
1781
1782         for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
1783                 stream = &priv->ampdu[i];
1784                 if (stream->state == AMPDU_NO_STREAM) {
1785                         stream->sta = sta;
1786                         stream->state = AMPDU_STREAM_NEW;
1787                         stream->tid = tid;
1788                         stream->idx = i;
1789                         wiphy_debug(hw->wiphy, "Added a new stream for %pM %d",
1790                                     sta->addr, tid);
1791                         return stream;
1792                 }
1793         }
1794         return NULL;
1795 }
1796
1797 static int
1798 mwl8k_start_stream(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream)
1799 {
1800         int ret;
1801
1802         /* if the stream has already been started, don't start it again */
1803         if (stream->state != AMPDU_STREAM_NEW)
1804                 return 0;
1805         ret = ieee80211_start_tx_ba_session(stream->sta, stream->tid, 0);
1806         if (ret)
1807                 wiphy_debug(hw->wiphy, "Failed to start stream for %pM %d: "
1808                             "%d\n", stream->sta->addr, stream->tid, ret);
1809         else
1810                 wiphy_debug(hw->wiphy, "Started stream for %pM %d\n",
1811                             stream->sta->addr, stream->tid);
1812         return ret;
1813 }
1814
1815 static void
1816 mwl8k_remove_stream(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream)
1817 {
1818         wiphy_debug(hw->wiphy, "Remove stream for %pM %d\n", stream->sta->addr,
1819                     stream->tid);
1820         memset(stream, 0, sizeof(*stream));
1821 }
1822
1823 static struct mwl8k_ampdu_stream *
1824 mwl8k_lookup_stream(struct ieee80211_hw *hw, u8 *addr, u8 tid)
1825 {
1826         struct mwl8k_priv *priv = hw->priv;
1827         int i;
1828
1829         for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
1830                 struct mwl8k_ampdu_stream *stream;
1831                 stream = &priv->ampdu[i];
1832                 if (stream->state == AMPDU_NO_STREAM)
1833                         continue;
1834                 if (!memcmp(stream->sta->addr, addr, ETH_ALEN) &&
1835                     stream->tid == tid)
1836                         return stream;
1837         }
1838         return NULL;
1839 }
1840
1841 #define MWL8K_AMPDU_PACKET_THRESHOLD 64
1842 static inline bool mwl8k_ampdu_allowed(struct ieee80211_sta *sta, u8 tid)
1843 {
1844         struct mwl8k_sta *sta_info = MWL8K_STA(sta);
1845         struct tx_traffic_info *tx_stats;
1846
1847         BUG_ON(tid >= MWL8K_MAX_TID);
1848         tx_stats = &sta_info->tx_stats[tid];
1849
1850         return sta_info->is_ampdu_allowed &&
1851                 tx_stats->pkts > MWL8K_AMPDU_PACKET_THRESHOLD;
1852 }
1853
1854 static inline void mwl8k_tx_count_packet(struct ieee80211_sta *sta, u8 tid)
1855 {
1856         struct mwl8k_sta *sta_info = MWL8K_STA(sta);
1857         struct tx_traffic_info *tx_stats;
1858
1859         BUG_ON(tid >= MWL8K_MAX_TID);
1860         tx_stats = &sta_info->tx_stats[tid];
1861
1862         if (tx_stats->start_time == 0)
1863                 tx_stats->start_time = jiffies;
1864
1865         /* reset the packet count after each second elapses.  If the number of
1866          * packets ever exceeds the ampdu_min_traffic threshold, we will allow
1867          * an ampdu stream to be started.
1868          */
1869         if (jiffies - tx_stats->start_time > HZ) {
1870                 tx_stats->pkts = 0;
1871                 tx_stats->start_time = 0;
1872         } else
1873                 tx_stats->pkts++;
1874 }
1875
1876 /* The hardware ampdu queues start from 5.
1877  * txpriorities for ampdu queues are
1878  * 5 6 7 0 1 2 3 4 ie., queue 5 is highest
1879  * and queue 3 is lowest (queue 4 is reserved)
1880  */
1881 #define BA_QUEUE                5
1882
1883 static void
1884 mwl8k_txq_xmit(struct ieee80211_hw *hw,
1885                int index,
1886                struct ieee80211_sta *sta,
1887                struct sk_buff *skb)
1888 {
1889         struct mwl8k_priv *priv = hw->priv;
1890         struct ieee80211_tx_info *tx_info;
1891         struct mwl8k_vif *mwl8k_vif;
1892         struct ieee80211_hdr *wh;
1893         struct mwl8k_tx_queue *txq;
1894         struct mwl8k_tx_desc *tx;
1895         dma_addr_t dma;
1896         u32 txstatus;
1897         u8 txdatarate;
1898         u16 qos;
1899         int txpriority;
1900         u8 tid = 0;
1901         struct mwl8k_ampdu_stream *stream = NULL;
1902         bool start_ba_session = false;
1903         bool mgmtframe = false;
1904         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
1905         bool eapol_frame = false;
1906
1907         wh = (struct ieee80211_hdr *)skb->data;
1908         if (ieee80211_is_data_qos(wh->frame_control))
1909                 qos = le16_to_cpu(*((__le16 *)ieee80211_get_qos_ctl(wh)));
1910         else
1911                 qos = 0;
1912
1913         if (skb->protocol == cpu_to_be16(ETH_P_PAE))
1914                 eapol_frame = true;
1915
1916         if (ieee80211_is_mgmt(wh->frame_control))
1917                 mgmtframe = true;
1918
1919         if (priv->ap_fw)
1920                 mwl8k_encapsulate_tx_frame(priv, skb);
1921         else
1922                 mwl8k_add_dma_header(priv, skb, 0, 0);
1923
1924         wh = &((struct mwl8k_dma_data *)skb->data)->wh;
1925
1926         tx_info = IEEE80211_SKB_CB(skb);
1927         mwl8k_vif = MWL8K_VIF(tx_info->control.vif);
1928
1929         if (tx_info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
1930                 wh->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1931                 wh->seq_ctrl |= cpu_to_le16(mwl8k_vif->seqno);
1932                 mwl8k_vif->seqno += 0x10;
1933         }
1934
1935         /* Setup firmware control bit fields for each frame type.  */
1936         txstatus = 0;
1937         txdatarate = 0;
1938         if (ieee80211_is_mgmt(wh->frame_control) ||
1939             ieee80211_is_ctl(wh->frame_control)) {
1940                 txdatarate = 0;
1941                 qos |= MWL8K_QOS_QLEN_UNSPEC | MWL8K_QOS_EOSP;
1942         } else if (ieee80211_is_data(wh->frame_control)) {
1943                 txdatarate = 1;
1944                 if (is_multicast_ether_addr(wh->addr1))
1945                         txstatus |= MWL8K_TXD_STATUS_MULTICAST_TX;
1946
1947                 qos &= ~MWL8K_QOS_ACK_POLICY_MASK;
1948                 if (tx_info->flags & IEEE80211_TX_CTL_AMPDU)
1949                         qos |= MWL8K_QOS_ACK_POLICY_BLOCKACK;
1950                 else
1951                         qos |= MWL8K_QOS_ACK_POLICY_NORMAL;
1952         }
1953
1954         /* Queue ADDBA request in the respective data queue.  While setting up
1955          * the ampdu stream, mac80211 queues further packets for that
1956          * particular ra/tid pair.  However, packets piled up in the hardware
1957          * for that ra/tid pair will still go out. ADDBA request and the
1958          * related data packets going out from different queues asynchronously
1959          * will cause a shift in the receiver window which might result in
1960          * ampdu packets getting dropped at the receiver after the stream has
1961          * been setup.
1962          */
1963         if (unlikely(ieee80211_is_action(wh->frame_control) &&
1964             mgmt->u.action.category == WLAN_CATEGORY_BACK &&
1965             mgmt->u.action.u.addba_req.action_code == WLAN_ACTION_ADDBA_REQ &&
1966             priv->ap_fw)) {
1967                 u16 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1968                 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1969                 index = mwl8k_tid_queue_mapping(tid);
1970         }
1971
1972         txpriority = index;
1973
1974         if (priv->ap_fw && sta && sta->ht_cap.ht_supported && !eapol_frame &&
1975             ieee80211_is_data_qos(wh->frame_control)) {
1976                 tid = qos & 0xf;
1977                 mwl8k_tx_count_packet(sta, tid);
1978                 spin_lock(&priv->stream_lock);
1979                 stream = mwl8k_lookup_stream(hw, sta->addr, tid);
1980                 if (stream != NULL) {
1981                         if (stream->state == AMPDU_STREAM_ACTIVE) {
1982                                 WARN_ON(!(qos & MWL8K_QOS_ACK_POLICY_BLOCKACK));
1983                                 txpriority = (BA_QUEUE + stream->idx) %
1984                                              TOTAL_HW_TX_QUEUES;
1985                                 if (stream->idx <= 1)
1986                                         index = stream->idx +
1987                                                 MWL8K_TX_WMM_QUEUES;
1988
1989                         } else if (stream->state == AMPDU_STREAM_NEW) {
1990                                 /* We get here if the driver sends us packets
1991                                  * after we've initiated a stream, but before
1992                                  * our ampdu_action routine has been called
1993                                  * with IEEE80211_AMPDU_TX_START to get the SSN
1994                                  * for the ADDBA request.  So this packet can
1995                                  * go out with no risk of sequence number
1996                                  * mismatch.  No special handling is required.
1997                                  */
1998                         } else {
1999                                 /* Drop packets that would go out after the
2000                                  * ADDBA request was sent but before the ADDBA
2001                                  * response is received.  If we don't do this,
2002                                  * the recipient would probably receive it
2003                                  * after the ADDBA request with SSN 0.  This
2004                                  * will cause the recipient's BA receive window
2005                                  * to shift, which would cause the subsequent
2006                                  * packets in the BA stream to be discarded.
2007                                  * mac80211 queues our packets for us in this
2008                                  * case, so this is really just a safety check.
2009                                  */
2010                                 wiphy_warn(hw->wiphy,
2011                                            "Cannot send packet while ADDBA "
2012                                            "dialog is underway.\n");
2013                                 spin_unlock(&priv->stream_lock);
2014                                 dev_kfree_skb(skb);
2015                                 return;
2016                         }
2017                 } else {
2018                         /* Defer calling mwl8k_start_stream so that the current
2019                          * skb can go out before the ADDBA request.  This
2020                          * prevents sequence number mismatch at the recepient
2021                          * as described above.
2022                          */
2023                         if (mwl8k_ampdu_allowed(sta, tid)) {
2024                                 stream = mwl8k_add_stream(hw, sta, tid);
2025                                 if (stream != NULL)
2026                                         start_ba_session = true;
2027                         }
2028                 }
2029                 spin_unlock(&priv->stream_lock);
2030         } else {
2031                 qos &= ~MWL8K_QOS_ACK_POLICY_MASK;
2032                 qos |= MWL8K_QOS_ACK_POLICY_NORMAL;
2033         }
2034
2035         dma = pci_map_single(priv->pdev, skb->data,
2036                                 skb->len, PCI_DMA_TODEVICE);
2037
2038         if (pci_dma_mapping_error(priv->pdev, dma)) {
2039                 wiphy_debug(hw->wiphy,
2040                             "failed to dma map skb, dropping TX frame.\n");
2041                 if (start_ba_session) {
2042                         spin_lock(&priv->stream_lock);
2043                         mwl8k_remove_stream(hw, stream);
2044                         spin_unlock(&priv->stream_lock);
2045                 }
2046                 dev_kfree_skb(skb);
2047                 return;
2048         }
2049
2050         spin_lock_bh(&priv->tx_lock);
2051
2052         txq = priv->txq + index;
2053
2054         /* Mgmt frames that go out frequently are probe
2055          * responses. Other mgmt frames got out relatively
2056          * infrequently. Hence reserve 2 buffers so that
2057          * other mgmt frames do not get dropped due to an
2058          * already queued probe response in one of the
2059          * reserved buffers.
2060          */
2061
2062         if (txq->len >= MWL8K_TX_DESCS - 2) {
2063                 if (!mgmtframe || txq->len == MWL8K_TX_DESCS) {
2064                         if (start_ba_session) {
2065                                 spin_lock(&priv->stream_lock);
2066                                 mwl8k_remove_stream(hw, stream);
2067                                 spin_unlock(&priv->stream_lock);
2068                         }
2069                         mwl8k_tx_start(priv);
2070                         spin_unlock_bh(&priv->tx_lock);
2071                         pci_unmap_single(priv->pdev, dma, skb->len,
2072                                          PCI_DMA_TODEVICE);
2073                         dev_kfree_skb(skb);
2074                         return;
2075                 }
2076         }
2077
2078         BUG_ON(txq->skb[txq->tail] != NULL);
2079         txq->skb[txq->tail] = skb;
2080
2081         tx = txq->txd + txq->tail;
2082         tx->data_rate = txdatarate;
2083         tx->tx_priority = txpriority;
2084         tx->qos_control = cpu_to_le16(qos);
2085         tx->pkt_phys_addr = cpu_to_le32(dma);
2086         tx->pkt_len = cpu_to_le16(skb->len);
2087         tx->rate_info = 0;
2088         if (!priv->ap_fw && sta != NULL)
2089                 tx->peer_id = MWL8K_STA(sta)->peer_id;
2090         else
2091                 tx->peer_id = 0;
2092
2093         if (priv->ap_fw && ieee80211_is_data(wh->frame_control) && !eapol_frame)
2094                 tx->timestamp = cpu_to_le32(ioread32(priv->regs +
2095                                                 MWL8K_HW_TIMER_REGISTER));
2096         else
2097                 tx->timestamp = 0;
2098
2099         wmb();
2100         tx->status = cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED | txstatus);
2101
2102         txq->len++;
2103         priv->pending_tx_pkts++;
2104
2105         txq->tail++;
2106         if (txq->tail == MWL8K_TX_DESCS)
2107                 txq->tail = 0;
2108
2109         mwl8k_tx_start(priv);
2110
2111         spin_unlock_bh(&priv->tx_lock);
2112
2113         /* Initiate the ampdu session here */
2114         if (start_ba_session) {
2115                 spin_lock(&priv->stream_lock);
2116                 if (mwl8k_start_stream(hw, stream))
2117                         mwl8k_remove_stream(hw, stream);
2118                 spin_unlock(&priv->stream_lock);
2119         }
2120 }
2121
2122
2123 /*
2124  * Firmware access.
2125  *
2126  * We have the following requirements for issuing firmware commands:
2127  * - Some commands require that the packet transmit path is idle when
2128  *   the command is issued.  (For simplicity, we'll just quiesce the
2129  *   transmit path for every command.)
2130  * - There are certain sequences of commands that need to be issued to
2131  *   the hardware sequentially, with no other intervening commands.
2132  *
2133  * This leads to an implementation of a "firmware lock" as a mutex that
2134  * can be taken recursively, and which is taken by both the low-level
2135  * command submission function (mwl8k_post_cmd) as well as any users of
2136  * that function that require issuing of an atomic sequence of commands,
2137  * and quiesces the transmit path whenever it's taken.
2138  */
2139 static int mwl8k_fw_lock(struct ieee80211_hw *hw)
2140 {
2141         struct mwl8k_priv *priv = hw->priv;
2142
2143         if (priv->fw_mutex_owner != current) {
2144                 int rc;
2145
2146                 mutex_lock(&priv->fw_mutex);
2147                 ieee80211_stop_queues(hw);
2148
2149                 rc = mwl8k_tx_wait_empty(hw);
2150                 if (rc) {
2151                         if (!priv->hw_restart_in_progress)
2152                                 ieee80211_wake_queues(hw);
2153
2154                         mutex_unlock(&priv->fw_mutex);
2155
2156                         return rc;
2157                 }
2158
2159                 priv->fw_mutex_owner = current;
2160         }
2161
2162         priv->fw_mutex_depth++;
2163
2164         return 0;
2165 }
2166
2167 static void mwl8k_fw_unlock(struct ieee80211_hw *hw)
2168 {
2169         struct mwl8k_priv *priv = hw->priv;
2170
2171         if (!--priv->fw_mutex_depth) {
2172                 if (!priv->hw_restart_in_progress)
2173                         ieee80211_wake_queues(hw);
2174
2175                 priv->fw_mutex_owner = NULL;
2176                 mutex_unlock(&priv->fw_mutex);
2177         }
2178 }
2179
2180 static void mwl8k_enable_bsses(struct ieee80211_hw *hw, bool enable,
2181                                u32 bitmap);
2182
2183 /*
2184  * Command processing.
2185  */
2186
2187 /* Timeout firmware commands after 10s */
2188 #define MWL8K_CMD_TIMEOUT_MS    10000
2189
2190 static int mwl8k_post_cmd(struct ieee80211_hw *hw, struct mwl8k_cmd_pkt *cmd)
2191 {
2192         DECLARE_COMPLETION_ONSTACK(cmd_wait);
2193         struct mwl8k_priv *priv = hw->priv;
2194         void __iomem *regs = priv->regs;
2195         dma_addr_t dma_addr;
2196         unsigned int dma_size;
2197         int rc;
2198         unsigned long timeout = 0;
2199         u8 buf[32];
2200         u32 bitmap = 0;
2201
2202         wiphy_dbg(hw->wiphy, "Posting %s [%d]\n",
2203                   mwl8k_cmd_name(cmd->code, buf, sizeof(buf)), cmd->macid);
2204
2205         /* Before posting firmware commands that could change the hardware
2206          * characteristics, make sure that all BSSes are stopped temporary.
2207          * Enable these stopped BSSes after completion of the commands
2208          */
2209
2210         rc = mwl8k_fw_lock(hw);
2211         if (rc)
2212                 return rc;
2213
2214         if (priv->ap_fw && priv->running_bsses) {
2215                 switch (le16_to_cpu(cmd->code)) {
2216                 case MWL8K_CMD_SET_RF_CHANNEL:
2217                 case MWL8K_CMD_RADIO_CONTROL:
2218                 case MWL8K_CMD_RF_TX_POWER:
2219                 case MWL8K_CMD_TX_POWER:
2220                 case MWL8K_CMD_RF_ANTENNA:
2221                 case MWL8K_CMD_RTS_THRESHOLD:
2222                 case MWL8K_CMD_MIMO_CONFIG:
2223                         bitmap = priv->running_bsses;
2224                         mwl8k_enable_bsses(hw, false, bitmap);
2225                         break;
2226                 }
2227         }
2228
2229         cmd->result = (__force __le16) 0xffff;
2230         dma_size = le16_to_cpu(cmd->length);
2231         dma_addr = pci_map_single(priv->pdev, cmd, dma_size,
2232                                   PCI_DMA_BIDIRECTIONAL);
2233         if (pci_dma_mapping_error(priv->pdev, dma_addr))
2234                 return -ENOMEM;
2235
2236         priv->hostcmd_wait = &cmd_wait;
2237         iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR);
2238         iowrite32(MWL8K_H2A_INT_DOORBELL,
2239                 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
2240         iowrite32(MWL8K_H2A_INT_DUMMY,
2241                 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
2242
2243         timeout = wait_for_completion_timeout(&cmd_wait,
2244                                 msecs_to_jiffies(MWL8K_CMD_TIMEOUT_MS));
2245
2246         priv->hostcmd_wait = NULL;
2247
2248
2249         pci_unmap_single(priv->pdev, dma_addr, dma_size,
2250                                         PCI_DMA_BIDIRECTIONAL);
2251
2252         if (!timeout) {
2253                 wiphy_err(hw->wiphy, "Command %s timeout after %u ms\n",
2254                           mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
2255                           MWL8K_CMD_TIMEOUT_MS);
2256                 rc = -ETIMEDOUT;
2257         } else {
2258                 int ms;
2259
2260                 ms = MWL8K_CMD_TIMEOUT_MS - jiffies_to_msecs(timeout);
2261
2262                 rc = cmd->result ? -EINVAL : 0;
2263                 if (rc)
2264                         wiphy_err(hw->wiphy, "Command %s error 0x%x\n",
2265                                   mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
2266                                   le16_to_cpu(cmd->result));
2267                 else if (ms > 2000)
2268                         wiphy_notice(hw->wiphy, "Command %s took %d ms\n",
2269                                      mwl8k_cmd_name(cmd->code,
2270                                                     buf, sizeof(buf)),
2271                                      ms);
2272         }
2273
2274         if (bitmap)
2275                 mwl8k_enable_bsses(hw, true, bitmap);
2276
2277         mwl8k_fw_unlock(hw);
2278
2279         return rc;
2280 }
2281
2282 static int mwl8k_post_pervif_cmd(struct ieee80211_hw *hw,
2283                                  struct ieee80211_vif *vif,
2284                                  struct mwl8k_cmd_pkt *cmd)
2285 {
2286         if (vif != NULL)
2287                 cmd->macid = MWL8K_VIF(vif)->macid;
2288         return mwl8k_post_cmd(hw, cmd);
2289 }
2290
2291 /*
2292  * Setup code shared between STA and AP firmware images.
2293  */
2294 static void mwl8k_setup_2ghz_band(struct ieee80211_hw *hw)
2295 {
2296         struct mwl8k_priv *priv = hw->priv;
2297
2298         BUILD_BUG_ON(sizeof(priv->channels_24) != sizeof(mwl8k_channels_24));
2299         memcpy(priv->channels_24, mwl8k_channels_24, sizeof(mwl8k_channels_24));
2300
2301         BUILD_BUG_ON(sizeof(priv->rates_24) != sizeof(mwl8k_rates_24));
2302         memcpy(priv->rates_24, mwl8k_rates_24, sizeof(mwl8k_rates_24));
2303
2304         priv->band_24.band = NL80211_BAND_2GHZ;
2305         priv->band_24.channels = priv->channels_24;
2306         priv->band_24.n_channels = ARRAY_SIZE(mwl8k_channels_24);
2307         priv->band_24.bitrates = priv->rates_24;
2308         priv->band_24.n_bitrates = ARRAY_SIZE(mwl8k_rates_24);
2309
2310         hw->wiphy->bands[NL80211_BAND_2GHZ] = &priv->band_24;
2311 }
2312
2313 static void mwl8k_setup_5ghz_band(struct ieee80211_hw *hw)
2314 {
2315         struct mwl8k_priv *priv = hw->priv;
2316
2317         BUILD_BUG_ON(sizeof(priv->channels_50) != sizeof(mwl8k_channels_50));
2318         memcpy(priv->channels_50, mwl8k_channels_50, sizeof(mwl8k_channels_50));
2319
2320         BUILD_BUG_ON(sizeof(priv->rates_50) != sizeof(mwl8k_rates_50));
2321         memcpy(priv->rates_50, mwl8k_rates_50, sizeof(mwl8k_rates_50));
2322
2323         priv->band_50.band = NL80211_BAND_5GHZ;
2324         priv->band_50.channels = priv->channels_50;
2325         priv->band_50.n_channels = ARRAY_SIZE(mwl8k_channels_50);
2326         priv->band_50.bitrates = priv->rates_50;
2327         priv->band_50.n_bitrates = ARRAY_SIZE(mwl8k_rates_50);
2328
2329         hw->wiphy->bands[NL80211_BAND_5GHZ] = &priv->band_50;
2330 }
2331
2332 /*
2333  * CMD_GET_HW_SPEC (STA version).
2334  */
2335 struct mwl8k_cmd_get_hw_spec_sta {
2336         struct mwl8k_cmd_pkt header;
2337         __u8 hw_rev;
2338         __u8 host_interface;
2339         __le16 num_mcaddrs;
2340         __u8 perm_addr[ETH_ALEN];
2341         __le16 region_code;
2342         __le32 fw_rev;
2343         __le32 ps_cookie;
2344         __le32 caps;
2345         __u8 mcs_bitmap[16];
2346         __le32 rx_queue_ptr;
2347         __le32 num_tx_queues;
2348         __le32 tx_queue_ptrs[MWL8K_TX_WMM_QUEUES];
2349         __le32 caps2;
2350         __le32 num_tx_desc_per_queue;
2351         __le32 total_rxd;
2352 } __packed;
2353
2354 #define MWL8K_CAP_MAX_AMSDU             0x20000000
2355 #define MWL8K_CAP_GREENFIELD            0x08000000
2356 #define MWL8K_CAP_AMPDU                 0x04000000
2357 #define MWL8K_CAP_RX_STBC               0x01000000
2358 #define MWL8K_CAP_TX_STBC               0x00800000
2359 #define MWL8K_CAP_SHORTGI_40MHZ         0x00400000
2360 #define MWL8K_CAP_SHORTGI_20MHZ         0x00200000
2361 #define MWL8K_CAP_RX_ANTENNA_MASK       0x000e0000
2362 #define MWL8K_CAP_TX_ANTENNA_MASK       0x0001c000
2363 #define MWL8K_CAP_DELAY_BA              0x00003000
2364 #define MWL8K_CAP_MIMO                  0x00000200
2365 #define MWL8K_CAP_40MHZ                 0x00000100
2366 #define MWL8K_CAP_BAND_MASK             0x00000007
2367 #define MWL8K_CAP_5GHZ                  0x00000004
2368 #define MWL8K_CAP_2GHZ4                 0x00000001
2369
2370 static void
2371 mwl8k_set_ht_caps(struct ieee80211_hw *hw,
2372                   struct ieee80211_supported_band *band, u32 cap)
2373 {
2374         int rx_streams;
2375         int tx_streams;
2376
2377         band->ht_cap.ht_supported = 1;
2378
2379         if (cap & MWL8K_CAP_MAX_AMSDU)
2380                 band->ht_cap.cap |= IEEE80211_HT_CAP_MAX_AMSDU;
2381         if (cap & MWL8K_CAP_GREENFIELD)
2382                 band->ht_cap.cap |= IEEE80211_HT_CAP_GRN_FLD;
2383         if (cap & MWL8K_CAP_AMPDU) {
2384                 ieee80211_hw_set(hw, AMPDU_AGGREGATION);
2385                 band->ht_cap.ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
2386                 band->ht_cap.ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE;
2387         }
2388         if (cap & MWL8K_CAP_RX_STBC)
2389                 band->ht_cap.cap |= IEEE80211_HT_CAP_RX_STBC;
2390         if (cap & MWL8K_CAP_TX_STBC)
2391                 band->ht_cap.cap |= IEEE80211_HT_CAP_TX_STBC;
2392         if (cap & MWL8K_CAP_SHORTGI_40MHZ)
2393                 band->ht_cap.cap |= IEEE80211_HT_CAP_SGI_40;
2394         if (cap & MWL8K_CAP_SHORTGI_20MHZ)
2395                 band->ht_cap.cap |= IEEE80211_HT_CAP_SGI_20;
2396         if (cap & MWL8K_CAP_DELAY_BA)
2397                 band->ht_cap.cap |= IEEE80211_HT_CAP_DELAY_BA;
2398         if (cap & MWL8K_CAP_40MHZ)
2399                 band->ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2400
2401         rx_streams = hweight32(cap & MWL8K_CAP_RX_ANTENNA_MASK);
2402         tx_streams = hweight32(cap & MWL8K_CAP_TX_ANTENNA_MASK);
2403
2404         band->ht_cap.mcs.rx_mask[0] = 0xff;
2405         if (rx_streams >= 2)
2406                 band->ht_cap.mcs.rx_mask[1] = 0xff;
2407         if (rx_streams >= 3)
2408                 band->ht_cap.mcs.rx_mask[2] = 0xff;
2409         band->ht_cap.mcs.rx_mask[4] = 0x01;
2410         band->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
2411
2412         if (rx_streams != tx_streams) {
2413                 band->ht_cap.mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
2414                 band->ht_cap.mcs.tx_params |= (tx_streams - 1) <<
2415                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
2416         }
2417 }
2418
2419 static void
2420 mwl8k_set_caps(struct ieee80211_hw *hw, u32 caps)
2421 {
2422         struct mwl8k_priv *priv = hw->priv;
2423
2424         if (priv->caps)
2425                 return;
2426
2427         if ((caps & MWL8K_CAP_2GHZ4) || !(caps & MWL8K_CAP_BAND_MASK)) {
2428                 mwl8k_setup_2ghz_band(hw);
2429                 if (caps & MWL8K_CAP_MIMO)
2430                         mwl8k_set_ht_caps(hw, &priv->band_24, caps);
2431         }
2432
2433         if (caps & MWL8K_CAP_5GHZ) {
2434                 mwl8k_setup_5ghz_band(hw);
2435                 if (caps & MWL8K_CAP_MIMO)
2436                         mwl8k_set_ht_caps(hw, &priv->band_50, caps);
2437         }
2438
2439         priv->caps = caps;
2440 }
2441
2442 static int mwl8k_cmd_get_hw_spec_sta(struct ieee80211_hw *hw)
2443 {
2444         struct mwl8k_priv *priv = hw->priv;
2445         struct mwl8k_cmd_get_hw_spec_sta *cmd;
2446         int rc;
2447         int i;
2448
2449         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2450         if (cmd == NULL)
2451                 return -ENOMEM;
2452
2453         cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_HW_SPEC);
2454         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2455
2456         memset(cmd->perm_addr, 0xff, sizeof(cmd->perm_addr));
2457         cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2458         cmd->rx_queue_ptr = cpu_to_le32(priv->rxq[0].rxd_dma);
2459         cmd->num_tx_queues = cpu_to_le32(mwl8k_tx_queues(priv));
2460         for (i = 0; i < mwl8k_tx_queues(priv); i++)
2461                 cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[i].txd_dma);
2462         cmd->num_tx_desc_per_queue = cpu_to_le32(MWL8K_TX_DESCS);
2463         cmd->total_rxd = cpu_to_le32(MWL8K_RX_DESCS);
2464
2465         rc = mwl8k_post_cmd(hw, &cmd->header);
2466
2467         if (!rc) {
2468                 SET_IEEE80211_PERM_ADDR(hw, cmd->perm_addr);
2469                 priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs);
2470                 priv->fw_rev = le32_to_cpu(cmd->fw_rev);
2471                 priv->hw_rev = cmd->hw_rev;
2472                 mwl8k_set_caps(hw, le32_to_cpu(cmd->caps));
2473                 priv->ap_macids_supported = 0x00000000;
2474                 priv->sta_macids_supported = 0x00000001;
2475         }
2476
2477         kfree(cmd);
2478         return rc;
2479 }
2480
2481 /*
2482  * CMD_GET_HW_SPEC (AP version).
2483  */
2484 struct mwl8k_cmd_get_hw_spec_ap {
2485         struct mwl8k_cmd_pkt header;
2486         __u8 hw_rev;
2487         __u8 host_interface;
2488         __le16 num_wcb;
2489         __le16 num_mcaddrs;
2490         __u8 perm_addr[ETH_ALEN];
2491         __le16 region_code;
2492         __le16 num_antenna;
2493         __le32 fw_rev;
2494         __le32 wcbbase0;
2495         __le32 rxwrptr;
2496         __le32 rxrdptr;
2497         __le32 ps_cookie;
2498         __le32 wcbbase1;
2499         __le32 wcbbase2;
2500         __le32 wcbbase3;
2501         __le32 fw_api_version;
2502         __le32 caps;
2503         __le32 num_of_ampdu_queues;
2504         __le32 wcbbase_ampdu[MWL8K_MAX_AMPDU_QUEUES];
2505 } __packed;
2506
2507 static int mwl8k_cmd_get_hw_spec_ap(struct ieee80211_hw *hw)
2508 {
2509         struct mwl8k_priv *priv = hw->priv;
2510         struct mwl8k_cmd_get_hw_spec_ap *cmd;
2511         int rc, i;
2512         u32 api_version;
2513
2514         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2515         if (cmd == NULL)
2516                 return -ENOMEM;
2517
2518         cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_HW_SPEC);
2519         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2520
2521         memset(cmd->perm_addr, 0xff, sizeof(cmd->perm_addr));
2522         cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2523
2524         rc = mwl8k_post_cmd(hw, &cmd->header);
2525
2526         if (!rc) {
2527                 int off;
2528
2529                 api_version = le32_to_cpu(cmd->fw_api_version);
2530                 if (priv->device_info->fw_api_ap != api_version) {
2531                         printk(KERN_ERR "%s: Unsupported fw API version for %s."
2532                                "  Expected %d got %d.\n", MWL8K_NAME,
2533                                priv->device_info->part_name,
2534                                priv->device_info->fw_api_ap,
2535                                api_version);
2536                         rc = -EINVAL;
2537                         goto done;
2538                 }
2539                 SET_IEEE80211_PERM_ADDR(hw, cmd->perm_addr);
2540                 priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs);
2541                 priv->fw_rev = le32_to_cpu(cmd->fw_rev);
2542                 priv->hw_rev = cmd->hw_rev;
2543                 mwl8k_set_caps(hw, le32_to_cpu(cmd->caps));
2544                 priv->ap_macids_supported = 0x000000ff;
2545                 priv->sta_macids_supported = 0x00000100;
2546                 priv->num_ampdu_queues = le32_to_cpu(cmd->num_of_ampdu_queues);
2547                 if (priv->num_ampdu_queues > MWL8K_MAX_AMPDU_QUEUES) {
2548                         wiphy_warn(hw->wiphy, "fw reported %d ampdu queues"
2549                                    " but we only support %d.\n",
2550                                    priv->num_ampdu_queues,
2551                                    MWL8K_MAX_AMPDU_QUEUES);
2552                         priv->num_ampdu_queues = MWL8K_MAX_AMPDU_QUEUES;
2553                 }
2554                 off = le32_to_cpu(cmd->rxwrptr) & 0xffff;
2555                 iowrite32(priv->rxq[0].rxd_dma, priv->sram + off);
2556
2557                 off = le32_to_cpu(cmd->rxrdptr) & 0xffff;
2558                 iowrite32(priv->rxq[0].rxd_dma, priv->sram + off);
2559
2560                 priv->txq_offset[0] = le32_to_cpu(cmd->wcbbase0) & 0xffff;
2561                 priv->txq_offset[1] = le32_to_cpu(cmd->wcbbase1) & 0xffff;
2562                 priv->txq_offset[2] = le32_to_cpu(cmd->wcbbase2) & 0xffff;
2563                 priv->txq_offset[3] = le32_to_cpu(cmd->wcbbase3) & 0xffff;
2564
2565                 for (i = 0; i < priv->num_ampdu_queues; i++)
2566                         priv->txq_offset[i + MWL8K_TX_WMM_QUEUES] =
2567                                 le32_to_cpu(cmd->wcbbase_ampdu[i]) & 0xffff;
2568         }
2569
2570 done:
2571         kfree(cmd);
2572         return rc;
2573 }
2574
2575 /*
2576  * CMD_SET_HW_SPEC.
2577  */
2578 struct mwl8k_cmd_set_hw_spec {
2579         struct mwl8k_cmd_pkt header;
2580         __u8 hw_rev;
2581         __u8 host_interface;
2582         __le16 num_mcaddrs;
2583         __u8 perm_addr[ETH_ALEN];
2584         __le16 region_code;
2585         __le32 fw_rev;
2586         __le32 ps_cookie;
2587         __le32 caps;
2588         __le32 rx_queue_ptr;
2589         __le32 num_tx_queues;
2590         __le32 tx_queue_ptrs[MWL8K_MAX_TX_QUEUES];
2591         __le32 flags;
2592         __le32 num_tx_desc_per_queue;
2593         __le32 total_rxd;
2594 } __packed;
2595
2596 /* If enabled, MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY will cause
2597  * packets to expire 500 ms after the timestamp in the tx descriptor.  That is,
2598  * the packets that are queued for more than 500ms, will be dropped in the
2599  * hardware. This helps minimizing the issues caused due to head-of-line
2600  * blocking where a slow client can hog the bandwidth and affect traffic to a
2601  * faster client.
2602  */
2603 #define MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY  0x00000400
2604 #define MWL8K_SET_HW_SPEC_FLAG_GENERATE_CCMP_HDR        0x00000200
2605 #define MWL8K_SET_HW_SPEC_FLAG_HOST_DECR_MGMT           0x00000080
2606 #define MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_PROBERESP       0x00000020
2607 #define MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_BEACON          0x00000010
2608
2609 static int mwl8k_cmd_set_hw_spec(struct ieee80211_hw *hw)
2610 {
2611         struct mwl8k_priv *priv = hw->priv;
2612         struct mwl8k_cmd_set_hw_spec *cmd;
2613         int rc;
2614         int i;
2615
2616         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2617         if (cmd == NULL)
2618                 return -ENOMEM;
2619
2620         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_HW_SPEC);
2621         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2622
2623         cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2624         cmd->rx_queue_ptr = cpu_to_le32(priv->rxq[0].rxd_dma);
2625         cmd->num_tx_queues = cpu_to_le32(mwl8k_tx_queues(priv));
2626
2627         /*
2628          * Mac80211 stack has Q0 as highest priority and Q3 as lowest in
2629          * that order. Firmware has Q3 as highest priority and Q0 as lowest
2630          * in that order. Map Q3 of mac80211 to Q0 of firmware so that the
2631          * priority is interpreted the right way in firmware.
2632          */
2633         for (i = 0; i < mwl8k_tx_queues(priv); i++) {
2634                 int j = mwl8k_tx_queues(priv) - 1 - i;
2635                 cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[j].txd_dma);
2636         }
2637
2638         cmd->flags = cpu_to_le32(MWL8K_SET_HW_SPEC_FLAG_HOST_DECR_MGMT |
2639                                  MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_PROBERESP |
2640                                  MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_BEACON |
2641                                  MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY |
2642                                  MWL8K_SET_HW_SPEC_FLAG_GENERATE_CCMP_HDR);
2643         cmd->num_tx_desc_per_queue = cpu_to_le32(MWL8K_TX_DESCS);
2644         cmd->total_rxd = cpu_to_le32(MWL8K_RX_DESCS);
2645
2646         rc = mwl8k_post_cmd(hw, &cmd->header);
2647         kfree(cmd);
2648
2649         return rc;
2650 }
2651
2652 /*
2653  * CMD_MAC_MULTICAST_ADR.
2654  */
2655 struct mwl8k_cmd_mac_multicast_adr {
2656         struct mwl8k_cmd_pkt header;
2657         __le16 action;
2658         __le16 numaddr;
2659         __u8 addr[0][ETH_ALEN];
2660 };
2661
2662 #define MWL8K_ENABLE_RX_DIRECTED        0x0001
2663 #define MWL8K_ENABLE_RX_MULTICAST       0x0002
2664 #define MWL8K_ENABLE_RX_ALL_MULTICAST   0x0004
2665 #define MWL8K_ENABLE_RX_BROADCAST       0x0008
2666
2667 static struct mwl8k_cmd_pkt *
2668 __mwl8k_cmd_mac_multicast_adr(struct ieee80211_hw *hw, int allmulti,
2669                               struct netdev_hw_addr_list *mc_list)
2670 {
2671         struct mwl8k_priv *priv = hw->priv;
2672         struct mwl8k_cmd_mac_multicast_adr *cmd;
2673         int size;
2674         int mc_count = 0;
2675
2676         if (mc_list)
2677                 mc_count = netdev_hw_addr_list_count(mc_list);
2678
2679         if (allmulti || mc_count > priv->num_mcaddrs) {
2680                 allmulti = 1;
2681                 mc_count = 0;
2682         }
2683
2684         size = sizeof(*cmd) + mc_count * ETH_ALEN;
2685
2686         cmd = kzalloc(size, GFP_ATOMIC);
2687         if (cmd == NULL)
2688                 return NULL;
2689
2690         cmd->header.code = cpu_to_le16(MWL8K_CMD_MAC_MULTICAST_ADR);
2691         cmd->header.length = cpu_to_le16(size);
2692         cmd->action = cpu_to_le16(MWL8K_ENABLE_RX_DIRECTED |
2693                                   MWL8K_ENABLE_RX_BROADCAST);
2694
2695         if (allmulti) {
2696                 cmd->action |= cpu_to_le16(MWL8K_ENABLE_RX_ALL_MULTICAST);
2697         } else if (mc_count) {
2698                 struct netdev_hw_addr *ha;
2699                 int i = 0;
2700
2701                 cmd->action |= cpu_to_le16(MWL8K_ENABLE_RX_MULTICAST);
2702                 cmd->numaddr = cpu_to_le16(mc_count);
2703                 netdev_hw_addr_list_for_each(ha, mc_list) {
2704                         memcpy(cmd->addr[i], ha->addr, ETH_ALEN);
2705                 }
2706         }
2707
2708         return &cmd->header;
2709 }
2710
2711 /*
2712  * CMD_GET_STAT.
2713  */
2714 struct mwl8k_cmd_get_stat {
2715         struct mwl8k_cmd_pkt header;
2716         __le32 stats[64];
2717 } __packed;
2718
2719 #define MWL8K_STAT_ACK_FAILURE  9
2720 #define MWL8K_STAT_RTS_FAILURE  12
2721 #define MWL8K_STAT_FCS_ERROR    24
2722 #define MWL8K_STAT_RTS_SUCCESS  11
2723
2724 static int mwl8k_cmd_get_stat(struct ieee80211_hw *hw,
2725                               struct ieee80211_low_level_stats *stats)
2726 {
2727         struct mwl8k_cmd_get_stat *cmd;
2728         int rc;
2729
2730         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2731         if (cmd == NULL)
2732                 return -ENOMEM;
2733
2734         cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_STAT);
2735         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2736
2737         rc = mwl8k_post_cmd(hw, &cmd->header);
2738         if (!rc) {
2739                 stats->dot11ACKFailureCount =
2740                         le32_to_cpu(cmd->stats[MWL8K_STAT_ACK_FAILURE]);
2741                 stats->dot11RTSFailureCount =
2742                         le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_FAILURE]);
2743                 stats->dot11FCSErrorCount =
2744                         le32_to_cpu(cmd->stats[MWL8K_STAT_FCS_ERROR]);
2745                 stats->dot11RTSSuccessCount =
2746                         le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_SUCCESS]);
2747         }
2748         kfree(cmd);
2749
2750         return rc;
2751 }
2752
2753 /*
2754  * CMD_RADIO_CONTROL.
2755  */
2756 struct mwl8k_cmd_radio_control {
2757         struct mwl8k_cmd_pkt header;
2758         __le16 action;
2759         __le16 control;
2760         __le16 radio_on;
2761 } __packed;
2762
2763 static int
2764 mwl8k_cmd_radio_control(struct ieee80211_hw *hw, bool enable, bool force)
2765 {
2766         struct mwl8k_priv *priv = hw->priv;
2767         struct mwl8k_cmd_radio_control *cmd;
2768         int rc;
2769
2770         if (enable == priv->radio_on && !force)
2771                 return 0;
2772
2773         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2774         if (cmd == NULL)
2775                 return -ENOMEM;
2776
2777         cmd->header.code = cpu_to_le16(MWL8K_CMD_RADIO_CONTROL);
2778         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2779         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
2780         cmd->control = cpu_to_le16(priv->radio_short_preamble ? 3 : 1);
2781         cmd->radio_on = cpu_to_le16(enable ? 0x0001 : 0x0000);
2782
2783         rc = mwl8k_post_cmd(hw, &cmd->header);
2784         kfree(cmd);
2785
2786         if (!rc)
2787                 priv->radio_on = enable;
2788
2789         return rc;
2790 }
2791
2792 static int mwl8k_cmd_radio_disable(struct ieee80211_hw *hw)
2793 {
2794         return mwl8k_cmd_radio_control(hw, 0, 0);
2795 }
2796
2797 static int mwl8k_cmd_radio_enable(struct ieee80211_hw *hw)
2798 {
2799         return mwl8k_cmd_radio_control(hw, 1, 0);
2800 }
2801
2802 static int
2803 mwl8k_set_radio_preamble(struct ieee80211_hw *hw, bool short_preamble)
2804 {
2805         struct mwl8k_priv *priv = hw->priv;
2806
2807         priv->radio_short_preamble = short_preamble;
2808
2809         return mwl8k_cmd_radio_control(hw, 1, 1);
2810 }
2811
2812 /*
2813  * CMD_RF_TX_POWER.
2814  */
2815 #define MWL8K_RF_TX_POWER_LEVEL_TOTAL   8
2816
2817 struct mwl8k_cmd_rf_tx_power {
2818         struct mwl8k_cmd_pkt header;
2819         __le16 action;
2820         __le16 support_level;
2821         __le16 current_level;
2822         __le16 reserved;
2823         __le16 power_level_list[MWL8K_RF_TX_POWER_LEVEL_TOTAL];
2824 } __packed;
2825
2826 static int mwl8k_cmd_rf_tx_power(struct ieee80211_hw *hw, int dBm)
2827 {
2828         struct mwl8k_cmd_rf_tx_power *cmd;
2829         int rc;
2830
2831         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2832         if (cmd == NULL)
2833                 return -ENOMEM;
2834
2835         cmd->header.code = cpu_to_le16(MWL8K_CMD_RF_TX_POWER);
2836         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2837         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
2838         cmd->support_level = cpu_to_le16(dBm);
2839
2840         rc = mwl8k_post_cmd(hw, &cmd->header);
2841         kfree(cmd);
2842
2843         return rc;
2844 }
2845
2846 /*
2847  * CMD_TX_POWER.
2848  */
2849 #define MWL8K_TX_POWER_LEVEL_TOTAL      12
2850
2851 struct mwl8k_cmd_tx_power {
2852         struct mwl8k_cmd_pkt header;
2853         __le16 action;
2854         __le16 band;
2855         __le16 channel;
2856         __le16 bw;
2857         __le16 sub_ch;
2858         __le16 power_level_list[MWL8K_TX_POWER_LEVEL_TOTAL];
2859 } __packed;
2860
2861 static int mwl8k_cmd_tx_power(struct ieee80211_hw *hw,
2862                                      struct ieee80211_conf *conf,
2863                                      unsigned short pwr)
2864 {
2865         struct ieee80211_channel *channel = conf->chandef.chan;
2866         enum nl80211_channel_type channel_type =
2867                 cfg80211_get_chandef_type(&conf->chandef);
2868         struct mwl8k_cmd_tx_power *cmd;
2869         int rc;
2870         int i;
2871
2872         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2873         if (cmd == NULL)
2874                 return -ENOMEM;
2875
2876         cmd->header.code = cpu_to_le16(MWL8K_CMD_TX_POWER);
2877         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2878         cmd->action = cpu_to_le16(MWL8K_CMD_SET_LIST);
2879
2880         if (channel->band == NL80211_BAND_2GHZ)
2881                 cmd->band = cpu_to_le16(0x1);
2882         else if (channel->band == NL80211_BAND_5GHZ)
2883                 cmd->band = cpu_to_le16(0x4);
2884
2885         cmd->channel = cpu_to_le16(channel->hw_value);
2886
2887         if (channel_type == NL80211_CHAN_NO_HT ||
2888             channel_type == NL80211_CHAN_HT20) {
2889                 cmd->bw = cpu_to_le16(0x2);
2890         } else {
2891                 cmd->bw = cpu_to_le16(0x4);
2892                 if (channel_type == NL80211_CHAN_HT40MINUS)
2893                         cmd->sub_ch = cpu_to_le16(0x3);
2894                 else if (channel_type == NL80211_CHAN_HT40PLUS)
2895                         cmd->sub_ch = cpu_to_le16(0x1);
2896         }
2897
2898         for (i = 0; i < MWL8K_TX_POWER_LEVEL_TOTAL; i++)
2899                 cmd->power_level_list[i] = cpu_to_le16(pwr);
2900
2901         rc = mwl8k_post_cmd(hw, &cmd->header);
2902         kfree(cmd);
2903
2904         return rc;
2905 }
2906
2907 /*
2908  * CMD_RF_ANTENNA.
2909  */
2910 struct mwl8k_cmd_rf_antenna {
2911         struct mwl8k_cmd_pkt header;
2912         __le16 antenna;
2913         __le16 mode;
2914 } __packed;
2915
2916 #define MWL8K_RF_ANTENNA_RX             1
2917 #define MWL8K_RF_ANTENNA_TX             2
2918
2919 static int
2920 mwl8k_cmd_rf_antenna(struct ieee80211_hw *hw, int antenna, int mask)
2921 {
2922         struct mwl8k_cmd_rf_antenna *cmd;
2923         int rc;
2924
2925         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2926         if (cmd == NULL)
2927                 return -ENOMEM;
2928
2929         cmd->header.code = cpu_to_le16(MWL8K_CMD_RF_ANTENNA);
2930         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2931         cmd->antenna = cpu_to_le16(antenna);
2932         cmd->mode = cpu_to_le16(mask);
2933
2934         rc = mwl8k_post_cmd(hw, &cmd->header);
2935         kfree(cmd);
2936
2937         return rc;
2938 }
2939
2940 /*
2941  * CMD_SET_BEACON.
2942  */
2943 struct mwl8k_cmd_set_beacon {
2944         struct mwl8k_cmd_pkt header;
2945         __le16 beacon_len;
2946         __u8 beacon[0];
2947 };
2948
2949 static int mwl8k_cmd_set_beacon(struct ieee80211_hw *hw,
2950                                 struct ieee80211_vif *vif, u8 *beacon, int len)
2951 {
2952         struct mwl8k_cmd_set_beacon *cmd;
2953         int rc;
2954
2955         cmd = kzalloc(sizeof(*cmd) + len, GFP_KERNEL);
2956         if (cmd == NULL)
2957                 return -ENOMEM;
2958
2959         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_BEACON);
2960         cmd->header.length = cpu_to_le16(sizeof(*cmd) + len);
2961         cmd->beacon_len = cpu_to_le16(len);
2962         memcpy(cmd->beacon, beacon, len);
2963
2964         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
2965         kfree(cmd);
2966
2967         return rc;
2968 }
2969
2970 /*
2971  * CMD_SET_PRE_SCAN.
2972  */
2973 struct mwl8k_cmd_set_pre_scan {
2974         struct mwl8k_cmd_pkt header;
2975 } __packed;
2976
2977 static int mwl8k_cmd_set_pre_scan(struct ieee80211_hw *hw)
2978 {
2979         struct mwl8k_cmd_set_pre_scan *cmd;
2980         int rc;
2981
2982         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2983         if (cmd == NULL)
2984                 return -ENOMEM;
2985
2986         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_PRE_SCAN);
2987         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2988
2989         rc = mwl8k_post_cmd(hw, &cmd->header);
2990         kfree(cmd);
2991
2992         return rc;
2993 }
2994
2995 /*
2996  * CMD_BBP_REG_ACCESS.
2997  */
2998 struct mwl8k_cmd_bbp_reg_access {
2999         struct mwl8k_cmd_pkt header;
3000         __le16 action;
3001         __le16 offset;
3002         u8 value;
3003         u8 rsrv[3];
3004 } __packed;
3005
3006 static int
3007 mwl8k_cmd_bbp_reg_access(struct ieee80211_hw *hw,
3008                          u16 action,
3009                          u16 offset,
3010                          u8 *value)
3011 {
3012         struct mwl8k_cmd_bbp_reg_access *cmd;
3013         int rc;
3014
3015         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3016         if (cmd == NULL)
3017                 return -ENOMEM;
3018
3019         cmd->header.code = cpu_to_le16(MWL8K_CMD_BBP_REG_ACCESS);
3020         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3021         cmd->action = cpu_to_le16(action);
3022         cmd->offset = cpu_to_le16(offset);
3023
3024         rc = mwl8k_post_cmd(hw, &cmd->header);
3025
3026         if (!rc)
3027                 *value = cmd->value;
3028         else
3029                 *value = 0;
3030
3031         kfree(cmd);
3032
3033         return rc;
3034 }
3035
3036 /*
3037  * CMD_SET_POST_SCAN.
3038  */
3039 struct mwl8k_cmd_set_post_scan {
3040         struct mwl8k_cmd_pkt header;
3041         __le32 isibss;
3042         __u8 bssid[ETH_ALEN];
3043 } __packed;
3044
3045 static int
3046 mwl8k_cmd_set_post_scan(struct ieee80211_hw *hw, const __u8 *mac)
3047 {
3048         struct mwl8k_cmd_set_post_scan *cmd;
3049         int rc;
3050
3051         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3052         if (cmd == NULL)
3053                 return -ENOMEM;
3054
3055         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_POST_SCAN);
3056         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3057         cmd->isibss = 0;
3058         memcpy(cmd->bssid, mac, ETH_ALEN);
3059
3060         rc = mwl8k_post_cmd(hw, &cmd->header);
3061         kfree(cmd);
3062
3063         return rc;
3064 }
3065
3066 static int freq_to_idx(struct mwl8k_priv *priv, int freq)
3067 {
3068         struct ieee80211_supported_band *sband;
3069         int band, ch, idx = 0;
3070
3071         for (band = NL80211_BAND_2GHZ; band < NUM_NL80211_BANDS; band++) {
3072                 sband = priv->hw->wiphy->bands[band];
3073                 if (!sband)
3074                         continue;
3075
3076                 for (ch = 0; ch < sband->n_channels; ch++, idx++)
3077                         if (sband->channels[ch].center_freq == freq)
3078                                 goto exit;
3079         }
3080
3081 exit:
3082         return idx;
3083 }
3084
3085 static void mwl8k_update_survey(struct mwl8k_priv *priv,
3086                                 struct ieee80211_channel *channel)
3087 {
3088         u32 cca_cnt, rx_rdy;
3089         s8 nf = 0, idx;
3090         struct survey_info *survey;
3091
3092         idx = freq_to_idx(priv, priv->acs_chan->center_freq);
3093         if (idx >= MWL8K_NUM_CHANS) {
3094                 wiphy_err(priv->hw->wiphy, "Failed to update survey\n");
3095                 return;
3096         }
3097
3098         survey = &priv->survey[idx];
3099
3100         cca_cnt = ioread32(priv->regs + NOK_CCA_CNT_REG);
3101         cca_cnt /= 1000; /* uSecs to mSecs */
3102         survey->time_busy = (u64) cca_cnt;
3103
3104         rx_rdy = ioread32(priv->regs + BBU_RXRDY_CNT_REG);
3105         rx_rdy /= 1000; /* uSecs to mSecs */
3106         survey->time_rx = (u64) rx_rdy;
3107
3108         priv->channel_time = jiffies - priv->channel_time;
3109         survey->time = jiffies_to_msecs(priv->channel_time);
3110
3111         survey->channel = channel;
3112
3113         mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &nf);
3114
3115         /* Make sure sign is negative else ACS  at hostapd fails */
3116         survey->noise = nf * -1;
3117
3118         survey->filled = SURVEY_INFO_NOISE_DBM |
3119                          SURVEY_INFO_TIME |
3120                          SURVEY_INFO_TIME_BUSY |
3121                          SURVEY_INFO_TIME_RX;
3122 }
3123
3124 /*
3125  * CMD_SET_RF_CHANNEL.
3126  */
3127 struct mwl8k_cmd_set_rf_channel {
3128         struct mwl8k_cmd_pkt header;
3129         __le16 action;
3130         __u8 current_channel;
3131         __le32 channel_flags;
3132 } __packed;
3133
3134 static int mwl8k_cmd_set_rf_channel(struct ieee80211_hw *hw,
3135                                     struct ieee80211_conf *conf)
3136 {
3137         struct ieee80211_channel *channel = conf->chandef.chan;
3138         enum nl80211_channel_type channel_type =
3139                 cfg80211_get_chandef_type(&conf->chandef);
3140         struct mwl8k_cmd_set_rf_channel *cmd;
3141         struct mwl8k_priv *priv = hw->priv;
3142         int rc;
3143
3144         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3145         if (cmd == NULL)
3146                 return -ENOMEM;
3147
3148         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RF_CHANNEL);
3149         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3150         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3151         cmd->current_channel = channel->hw_value;
3152
3153         if (channel->band == NL80211_BAND_2GHZ)
3154                 cmd->channel_flags |= cpu_to_le32(0x00000001);
3155         else if (channel->band == NL80211_BAND_5GHZ)
3156                 cmd->channel_flags |= cpu_to_le32(0x00000004);
3157
3158         if (!priv->sw_scan_start) {
3159                 if (channel_type == NL80211_CHAN_NO_HT ||
3160                     channel_type == NL80211_CHAN_HT20)
3161                         cmd->channel_flags |= cpu_to_le32(0x00000080);
3162                 else if (channel_type == NL80211_CHAN_HT40MINUS)
3163                         cmd->channel_flags |= cpu_to_le32(0x000001900);
3164                 else if (channel_type == NL80211_CHAN_HT40PLUS)
3165                         cmd->channel_flags |= cpu_to_le32(0x000000900);
3166         } else {
3167                 cmd->channel_flags |= cpu_to_le32(0x00000080);
3168         }
3169
3170         if (priv->sw_scan_start) {
3171                 /* Store current channel stats
3172                  * before switching to newer one.
3173                  * This will be processed only for AP fw.
3174                  */
3175                 if (priv->channel_time != 0)
3176                         mwl8k_update_survey(priv, priv->acs_chan);
3177
3178                 priv->channel_time = jiffies;
3179                 priv->acs_chan =  channel;
3180         }
3181
3182         rc = mwl8k_post_cmd(hw, &cmd->header);
3183         kfree(cmd);
3184
3185         return rc;
3186 }
3187
3188 /*
3189  * CMD_SET_AID.
3190  */
3191 #define MWL8K_FRAME_PROT_DISABLED                       0x00
3192 #define MWL8K_FRAME_PROT_11G                            0x07
3193 #define MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY              0x02
3194 #define MWL8K_FRAME_PROT_11N_HT_ALL                     0x06
3195
3196 struct mwl8k_cmd_update_set_aid {
3197         struct  mwl8k_cmd_pkt header;
3198         __le16  aid;
3199
3200          /* AP's MAC address (BSSID) */
3201         __u8    bssid[ETH_ALEN];
3202         __le16  protection_mode;
3203         __u8    supp_rates[14];
3204 } __packed;
3205
3206 static void legacy_rate_mask_to_array(u8 *rates, u32 mask)
3207 {
3208         int i;
3209         int j;
3210
3211         /*
3212          * Clear nonstandard rate 4.
3213          */
3214         mask &= 0x1fef;
3215
3216         for (i = 0, j = 0; i < 13; i++) {
3217                 if (mask & (1 << i))
3218                         rates[j++] = mwl8k_rates_24[i].hw_value;
3219         }
3220 }
3221
3222 static int
3223 mwl8k_cmd_set_aid(struct ieee80211_hw *hw,
3224                   struct ieee80211_vif *vif, u32 legacy_rate_mask)
3225 {
3226         struct mwl8k_cmd_update_set_aid *cmd;
3227         u16 prot_mode;
3228         int rc;
3229
3230         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3231         if (cmd == NULL)
3232                 return -ENOMEM;
3233
3234         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_AID);
3235         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3236         cmd->aid = cpu_to_le16(vif->bss_conf.aid);
3237         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
3238
3239         if (vif->bss_conf.use_cts_prot) {
3240                 prot_mode = MWL8K_FRAME_PROT_11G;
3241         } else {
3242                 switch (vif->bss_conf.ht_operation_mode &
3243                         IEEE80211_HT_OP_MODE_PROTECTION) {
3244                 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
3245                         prot_mode = MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY;
3246                         break;
3247                 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
3248                         prot_mode = MWL8K_FRAME_PROT_11N_HT_ALL;
3249                         break;
3250                 default:
3251                         prot_mode = MWL8K_FRAME_PROT_DISABLED;
3252                         break;
3253                 }
3254         }
3255         cmd->protection_mode = cpu_to_le16(prot_mode);
3256
3257         legacy_rate_mask_to_array(cmd->supp_rates, legacy_rate_mask);
3258
3259         rc = mwl8k_post_cmd(hw, &cmd->header);
3260         kfree(cmd);
3261
3262         return rc;
3263 }
3264
3265 /*
3266  * CMD_SET_RATE.
3267  */
3268 struct mwl8k_cmd_set_rate {
3269         struct  mwl8k_cmd_pkt header;
3270         __u8    legacy_rates[14];
3271
3272         /* Bitmap for supported MCS codes.  */
3273         __u8    mcs_set[16];
3274         __u8    reserved[16];
3275 } __packed;
3276
3277 static int
3278 mwl8k_cmd_set_rate(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
3279                    u32 legacy_rate_mask, u8 *mcs_rates)
3280 {
3281         struct mwl8k_cmd_set_rate *cmd;
3282         int rc;
3283
3284         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3285         if (cmd == NULL)
3286                 return -ENOMEM;
3287
3288         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATE);
3289         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3290         legacy_rate_mask_to_array(cmd->legacy_rates, legacy_rate_mask);
3291         memcpy(cmd->mcs_set, mcs_rates, 16);
3292
3293         rc = mwl8k_post_cmd(hw, &cmd->header);
3294         kfree(cmd);
3295
3296         return rc;
3297 }
3298
3299 /*
3300  * CMD_FINALIZE_JOIN.
3301  */
3302 #define MWL8K_FJ_BEACON_MAXLEN  128
3303
3304 struct mwl8k_cmd_finalize_join {
3305         struct mwl8k_cmd_pkt header;
3306         __le32 sleep_interval;  /* Number of beacon periods to sleep */
3307         __u8 beacon_data[MWL8K_FJ_BEACON_MAXLEN];
3308 } __packed;
3309
3310 static int mwl8k_cmd_finalize_join(struct ieee80211_hw *hw, void *frame,
3311                                    int framelen, int dtim)
3312 {
3313         struct mwl8k_cmd_finalize_join *cmd;
3314         struct ieee80211_mgmt *payload = frame;
3315         int payload_len;
3316         int rc;
3317
3318         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3319         if (cmd == NULL)
3320                 return -ENOMEM;
3321
3322         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_FINALIZE_JOIN);
3323         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3324         cmd->sleep_interval = cpu_to_le32(dtim ? dtim : 1);
3325
3326         payload_len = framelen - ieee80211_hdrlen(payload->frame_control);
3327         if (payload_len < 0)
3328                 payload_len = 0;
3329         else if (payload_len > MWL8K_FJ_BEACON_MAXLEN)
3330                 payload_len = MWL8K_FJ_BEACON_MAXLEN;
3331
3332         memcpy(cmd->beacon_data, &payload->u.beacon, payload_len);
3333
3334         rc = mwl8k_post_cmd(hw, &cmd->header);
3335         kfree(cmd);
3336
3337         return rc;
3338 }
3339
3340 /*
3341  * CMD_SET_RTS_THRESHOLD.
3342  */
3343 struct mwl8k_cmd_set_rts_threshold {
3344         struct mwl8k_cmd_pkt header;
3345         __le16 action;
3346         __le16 threshold;
3347 } __packed;
3348
3349 static int
3350 mwl8k_cmd_set_rts_threshold(struct ieee80211_hw *hw, int rts_thresh)
3351 {
3352         struct mwl8k_cmd_set_rts_threshold *cmd;
3353         int rc;
3354
3355         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3356         if (cmd == NULL)
3357                 return -ENOMEM;
3358
3359         cmd->header.code = cpu_to_le16(MWL8K_CMD_RTS_THRESHOLD);
3360         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3361         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3362         cmd->threshold = cpu_to_le16(rts_thresh);
3363
3364         rc = mwl8k_post_cmd(hw, &cmd->header);
3365         kfree(cmd);
3366
3367         return rc;
3368 }
3369
3370 /*
3371  * CMD_SET_SLOT.
3372  */
3373 struct mwl8k_cmd_set_slot {
3374         struct mwl8k_cmd_pkt header;
3375         __le16 action;
3376         __u8 short_slot;
3377 } __packed;
3378
3379 static int mwl8k_cmd_set_slot(struct ieee80211_hw *hw, bool short_slot_time)
3380 {
3381         struct mwl8k_cmd_set_slot *cmd;
3382         int rc;
3383
3384         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3385         if (cmd == NULL)
3386                 return -ENOMEM;
3387
3388         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_SLOT);
3389         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3390         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3391         cmd->short_slot = short_slot_time;
3392
3393         rc = mwl8k_post_cmd(hw, &cmd->header);
3394         kfree(cmd);
3395
3396         return rc;
3397 }
3398
3399 /*
3400  * CMD_SET_EDCA_PARAMS.
3401  */
3402 struct mwl8k_cmd_set_edca_params {
3403         struct mwl8k_cmd_pkt header;
3404
3405         /* See MWL8K_SET_EDCA_XXX below */
3406         __le16 action;
3407
3408         /* TX opportunity in units of 32 us */
3409         __le16 txop;
3410
3411         union {
3412                 struct {
3413                         /* Log exponent of max contention period: 0...15 */
3414                         __le32 log_cw_max;
3415
3416                         /* Log exponent of min contention period: 0...15 */
3417                         __le32 log_cw_min;
3418
3419                         /* Adaptive interframe spacing in units of 32us */
3420                         __u8 aifs;
3421
3422                         /* TX queue to configure */
3423                         __u8 txq;
3424                 } ap;
3425                 struct {
3426                         /* Log exponent of max contention period: 0...15 */
3427                         __u8 log_cw_max;
3428
3429                         /* Log exponent of min contention period: 0...15 */
3430                         __u8 log_cw_min;
3431
3432                         /* Adaptive interframe spacing in units of 32us */
3433                         __u8 aifs;
3434
3435                         /* TX queue to configure */
3436                         __u8 txq;
3437                 } sta;
3438         };
3439 } __packed;
3440
3441 #define MWL8K_SET_EDCA_CW       0x01
3442 #define MWL8K_SET_EDCA_TXOP     0x02
3443 #define MWL8K_SET_EDCA_AIFS     0x04
3444
3445 #define MWL8K_SET_EDCA_ALL      (MWL8K_SET_EDCA_CW | \
3446                                  MWL8K_SET_EDCA_TXOP | \
3447                                  MWL8K_SET_EDCA_AIFS)
3448
3449 static int
3450 mwl8k_cmd_set_edca_params(struct ieee80211_hw *hw, __u8 qnum,
3451                           __u16 cw_min, __u16 cw_max,
3452                           __u8 aifs, __u16 txop)
3453 {
3454         struct mwl8k_priv *priv = hw->priv;
3455         struct mwl8k_cmd_set_edca_params *cmd;
3456         int rc;
3457
3458         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3459         if (cmd == NULL)
3460                 return -ENOMEM;
3461
3462         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_EDCA_PARAMS);
3463         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3464         cmd->action = cpu_to_le16(MWL8K_SET_EDCA_ALL);
3465         cmd->txop = cpu_to_le16(txop);
3466         if (priv->ap_fw) {
3467                 cmd->ap.log_cw_max = cpu_to_le32(ilog2(cw_max + 1));
3468                 cmd->ap.log_cw_min = cpu_to_le32(ilog2(cw_min + 1));
3469                 cmd->ap.aifs = aifs;
3470                 cmd->ap.txq = qnum;
3471         } else {
3472                 cmd->sta.log_cw_max = (u8)ilog2(cw_max + 1);
3473                 cmd->sta.log_cw_min = (u8)ilog2(cw_min + 1);
3474                 cmd->sta.aifs = aifs;
3475                 cmd->sta.txq = qnum;
3476         }
3477
3478         rc = mwl8k_post_cmd(hw, &cmd->header);
3479         kfree(cmd);
3480
3481         return rc;
3482 }
3483
3484 /*
3485  * CMD_SET_WMM_MODE.
3486  */
3487 struct mwl8k_cmd_set_wmm_mode {
3488         struct mwl8k_cmd_pkt header;
3489         __le16 action;
3490 } __packed;
3491
3492 static int mwl8k_cmd_set_wmm_mode(struct ieee80211_hw *hw, bool enable)
3493 {
3494         struct mwl8k_priv *priv = hw->priv;
3495         struct mwl8k_cmd_set_wmm_mode *cmd;
3496         int rc;
3497
3498         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3499         if (cmd == NULL)
3500                 return -ENOMEM;
3501
3502         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_WMM_MODE);
3503         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3504         cmd->action = cpu_to_le16(!!enable);
3505
3506         rc = mwl8k_post_cmd(hw, &cmd->header);
3507         kfree(cmd);
3508
3509         if (!rc)
3510                 priv->wmm_enabled = enable;
3511
3512         return rc;
3513 }
3514
3515 /*
3516  * CMD_MIMO_CONFIG.
3517  */
3518 struct mwl8k_cmd_mimo_config {
3519         struct mwl8k_cmd_pkt header;
3520         __le32 action;
3521         __u8 rx_antenna_map;
3522         __u8 tx_antenna_map;
3523 } __packed;
3524
3525 static int mwl8k_cmd_mimo_config(struct ieee80211_hw *hw, __u8 rx, __u8 tx)
3526 {
3527         struct mwl8k_cmd_mimo_config *cmd;
3528         int rc;
3529
3530         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3531         if (cmd == NULL)
3532                 return -ENOMEM;
3533
3534         cmd->header.code = cpu_to_le16(MWL8K_CMD_MIMO_CONFIG);
3535         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3536         cmd->action = cpu_to_le32((u32)MWL8K_CMD_SET);
3537         cmd->rx_antenna_map = rx;
3538         cmd->tx_antenna_map = tx;
3539
3540         rc = mwl8k_post_cmd(hw, &cmd->header);
3541         kfree(cmd);
3542
3543         return rc;
3544 }
3545
3546 /*
3547  * CMD_USE_FIXED_RATE (STA version).
3548  */
3549 struct mwl8k_cmd_use_fixed_rate_sta {
3550         struct mwl8k_cmd_pkt header;
3551         __le32 action;
3552         __le32 allow_rate_drop;
3553         __le32 num_rates;
3554         struct {
3555                 __le32 is_ht_rate;
3556                 __le32 enable_retry;
3557                 __le32 rate;
3558                 __le32 retry_count;
3559         } rate_entry[8];
3560         __le32 rate_type;
3561         __le32 reserved1;
3562         __le32 reserved2;
3563 } __packed;
3564
3565 #define MWL8K_USE_AUTO_RATE     0x0002
3566 #define MWL8K_UCAST_RATE        0
3567
3568 static int mwl8k_cmd_use_fixed_rate_sta(struct ieee80211_hw *hw)
3569 {
3570         struct mwl8k_cmd_use_fixed_rate_sta *cmd;
3571         int rc;
3572
3573         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3574         if (cmd == NULL)
3575                 return -ENOMEM;
3576
3577         cmd->header.code = cpu_to_le16(MWL8K_CMD_USE_FIXED_RATE);
3578         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3579         cmd->action = cpu_to_le32(MWL8K_USE_AUTO_RATE);
3580         cmd->rate_type = cpu_to_le32(MWL8K_UCAST_RATE);
3581
3582         rc = mwl8k_post_cmd(hw, &cmd->header);
3583         kfree(cmd);
3584
3585         return rc;
3586 }
3587
3588 /*
3589  * CMD_USE_FIXED_RATE (AP version).
3590  */
3591 struct mwl8k_cmd_use_fixed_rate_ap {
3592         struct mwl8k_cmd_pkt header;
3593         __le32 action;
3594         __le32 allow_rate_drop;
3595         __le32 num_rates;
3596         struct mwl8k_rate_entry_ap {
3597                 __le32 is_ht_rate;
3598                 __le32 enable_retry;
3599                 __le32 rate;
3600                 __le32 retry_count;
3601         } rate_entry[4];
3602         u8 multicast_rate;
3603         u8 multicast_rate_type;
3604         u8 management_rate;
3605 } __packed;
3606
3607 static int
3608 mwl8k_cmd_use_fixed_rate_ap(struct ieee80211_hw *hw, int mcast, int mgmt)
3609 {
3610         struct mwl8k_cmd_use_fixed_rate_ap *cmd;
3611         int rc;
3612
3613         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3614         if (cmd == NULL)
3615                 return -ENOMEM;
3616
3617         cmd->header.code = cpu_to_le16(MWL8K_CMD_USE_FIXED_RATE);
3618         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3619         cmd->action = cpu_to_le32(MWL8K_USE_AUTO_RATE);
3620         cmd->multicast_rate = mcast;
3621         cmd->management_rate = mgmt;
3622
3623         rc = mwl8k_post_cmd(hw, &cmd->header);
3624         kfree(cmd);
3625
3626         return rc;
3627 }
3628
3629 /*
3630  * CMD_ENABLE_SNIFFER.
3631  */
3632 struct mwl8k_cmd_enable_sniffer {
3633         struct mwl8k_cmd_pkt header;
3634         __le32 action;
3635 } __packed;
3636
3637 static int mwl8k_cmd_enable_sniffer(struct ieee80211_hw *hw, bool enable)
3638 {
3639         struct mwl8k_cmd_enable_sniffer *cmd;
3640         int rc;
3641
3642         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3643         if (cmd == NULL)
3644                 return -ENOMEM;
3645
3646         cmd->header.code = cpu_to_le16(MWL8K_CMD_ENABLE_SNIFFER);
3647         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3648         cmd->action = cpu_to_le32(!!enable);
3649
3650         rc = mwl8k_post_cmd(hw, &cmd->header);
3651         kfree(cmd);
3652
3653         return rc;
3654 }
3655
3656 struct mwl8k_cmd_update_mac_addr {
3657         struct mwl8k_cmd_pkt header;
3658         union {
3659                 struct {
3660                         __le16 mac_type;
3661                         __u8 mac_addr[ETH_ALEN];
3662                 } mbss;
3663                 __u8 mac_addr[ETH_ALEN];
3664         };
3665 } __packed;
3666
3667 #define MWL8K_MAC_TYPE_PRIMARY_CLIENT           0
3668 #define MWL8K_MAC_TYPE_SECONDARY_CLIENT         1
3669 #define MWL8K_MAC_TYPE_PRIMARY_AP               2
3670 #define MWL8K_MAC_TYPE_SECONDARY_AP             3
3671
3672 static int mwl8k_cmd_update_mac_addr(struct ieee80211_hw *hw,
3673                                   struct ieee80211_vif *vif, u8 *mac, bool set)
3674 {
3675         struct mwl8k_priv *priv = hw->priv;
3676         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
3677         struct mwl8k_cmd_update_mac_addr *cmd;
3678         int mac_type;
3679         int rc;
3680
3681         mac_type = MWL8K_MAC_TYPE_PRIMARY_AP;
3682         if (vif != NULL && vif->type == NL80211_IFTYPE_STATION) {
3683                 if (mwl8k_vif->macid + 1 == ffs(priv->sta_macids_supported))
3684                         if (priv->ap_fw)
3685                                 mac_type = MWL8K_MAC_TYPE_SECONDARY_CLIENT;
3686                         else
3687                                 mac_type = MWL8K_MAC_TYPE_PRIMARY_CLIENT;
3688                 else
3689                         mac_type = MWL8K_MAC_TYPE_SECONDARY_CLIENT;
3690         } else if (vif != NULL && vif->type == NL80211_IFTYPE_AP) {
3691                 if (mwl8k_vif->macid + 1 == ffs(priv->ap_macids_supported))
3692                         mac_type = MWL8K_MAC_TYPE_PRIMARY_AP;
3693                 else
3694                         mac_type = MWL8K_MAC_TYPE_SECONDARY_AP;
3695         }
3696
3697         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3698         if (cmd == NULL)
3699                 return -ENOMEM;
3700
3701         if (set)
3702                 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_MAC_ADDR);
3703         else
3704                 cmd->header.code = cpu_to_le16(MWL8K_CMD_DEL_MAC_ADDR);
3705
3706         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3707         if (priv->ap_fw) {
3708                 cmd->mbss.mac_type = cpu_to_le16(mac_type);
3709                 memcpy(cmd->mbss.mac_addr, mac, ETH_ALEN);
3710         } else {
3711                 memcpy(cmd->mac_addr, mac, ETH_ALEN);
3712         }
3713
3714         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3715         kfree(cmd);
3716
3717         return rc;
3718 }
3719
3720 /*
3721  * MWL8K_CMD_SET_MAC_ADDR.
3722  */
3723 static inline int mwl8k_cmd_set_mac_addr(struct ieee80211_hw *hw,
3724                                   struct ieee80211_vif *vif, u8 *mac)
3725 {
3726         return mwl8k_cmd_update_mac_addr(hw, vif, mac, true);
3727 }
3728
3729 /*
3730  * MWL8K_CMD_DEL_MAC_ADDR.
3731  */
3732 static inline int mwl8k_cmd_del_mac_addr(struct ieee80211_hw *hw,
3733                                   struct ieee80211_vif *vif, u8 *mac)
3734 {
3735         return mwl8k_cmd_update_mac_addr(hw, vif, mac, false);
3736 }
3737
3738 /*
3739  * CMD_SET_RATEADAPT_MODE.
3740  */
3741 struct mwl8k_cmd_set_rate_adapt_mode {
3742         struct mwl8k_cmd_pkt header;
3743         __le16 action;
3744         __le16 mode;
3745 } __packed;
3746
3747 static int mwl8k_cmd_set_rateadapt_mode(struct ieee80211_hw *hw, __u16 mode)
3748 {
3749         struct mwl8k_cmd_set_rate_adapt_mode *cmd;
3750         int rc;
3751
3752         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3753         if (cmd == NULL)
3754                 return -ENOMEM;
3755
3756         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATEADAPT_MODE);
3757         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3758         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3759         cmd->mode = cpu_to_le16(mode);
3760
3761         rc = mwl8k_post_cmd(hw, &cmd->header);
3762         kfree(cmd);
3763
3764         return rc;
3765 }
3766
3767 /*
3768  * CMD_GET_WATCHDOG_BITMAP.
3769  */
3770 struct mwl8k_cmd_get_watchdog_bitmap {
3771         struct mwl8k_cmd_pkt header;
3772         u8      bitmap;
3773 } __packed;
3774
3775 static int mwl8k_cmd_get_watchdog_bitmap(struct ieee80211_hw *hw, u8 *bitmap)
3776 {
3777         struct mwl8k_cmd_get_watchdog_bitmap *cmd;
3778         int rc;
3779
3780         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3781         if (cmd == NULL)
3782                 return -ENOMEM;
3783
3784         cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_WATCHDOG_BITMAP);
3785         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3786
3787         rc = mwl8k_post_cmd(hw, &cmd->header);
3788         if (!rc)
3789                 *bitmap = cmd->bitmap;
3790
3791         kfree(cmd);
3792
3793         return rc;
3794 }
3795
3796 #define MWL8K_WMM_QUEUE_NUMBER  3
3797
3798 static void mwl8k_destroy_ba(struct ieee80211_hw *hw,
3799                              u8 idx);
3800
3801 static void mwl8k_watchdog_ba_events(struct work_struct *work)
3802 {
3803         int rc;
3804         u8 bitmap = 0, stream_index;
3805         struct mwl8k_ampdu_stream *streams;
3806         struct mwl8k_priv *priv =
3807                 container_of(work, struct mwl8k_priv, watchdog_ba_handle);
3808         struct ieee80211_hw *hw = priv->hw;
3809         int i;
3810         u32 status = 0;
3811
3812         mwl8k_fw_lock(hw);
3813
3814         rc = mwl8k_cmd_get_watchdog_bitmap(priv->hw, &bitmap);
3815         if (rc)
3816                 goto done;
3817
3818         spin_lock(&priv->stream_lock);
3819
3820         /* the bitmap is the hw queue number.  Map it to the ampdu queue. */
3821         for (i = 0; i < TOTAL_HW_TX_QUEUES; i++) {
3822                 if (bitmap & (1 << i)) {
3823                         stream_index = (i + MWL8K_WMM_QUEUE_NUMBER) %
3824                                        TOTAL_HW_TX_QUEUES;
3825                         streams = &priv->ampdu[stream_index];
3826                         if (streams->state == AMPDU_STREAM_ACTIVE) {
3827                                 ieee80211_stop_tx_ba_session(streams->sta,
3828                                                              streams->tid);
3829                                 spin_unlock(&priv->stream_lock);
3830                                 mwl8k_destroy_ba(hw, stream_index);
3831                                 spin_lock(&priv->stream_lock);
3832                         }
3833                 }
3834         }
3835
3836         spin_unlock(&priv->stream_lock);
3837 done:
3838         atomic_dec(&priv->watchdog_event_pending);
3839         status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
3840         iowrite32((status | MWL8K_A2H_INT_BA_WATCHDOG),
3841                   priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
3842         mwl8k_fw_unlock(hw);
3843         return;
3844 }
3845
3846
3847 /*
3848  * CMD_BSS_START.
3849  */
3850 struct mwl8k_cmd_bss_start {
3851         struct mwl8k_cmd_pkt header;
3852         __le32 enable;
3853 } __packed;
3854
3855 static int mwl8k_cmd_bss_start(struct ieee80211_hw *hw,
3856                                struct ieee80211_vif *vif, int enable)
3857 {
3858         struct mwl8k_cmd_bss_start *cmd;
3859         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
3860         struct mwl8k_priv *priv = hw->priv;
3861         int rc;
3862
3863         if (enable && (priv->running_bsses & (1 << mwl8k_vif->macid)))
3864                 return 0;
3865
3866         if (!enable && !(priv->running_bsses & (1 << mwl8k_vif->macid)))
3867                 return 0;
3868
3869         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3870         if (cmd == NULL)
3871                 return -ENOMEM;
3872
3873         cmd->header.code = cpu_to_le16(MWL8K_CMD_BSS_START);
3874         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3875         cmd->enable = cpu_to_le32(enable);
3876
3877         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3878         kfree(cmd);
3879
3880         if (!rc) {
3881                 if (enable)
3882                         priv->running_bsses |= (1 << mwl8k_vif->macid);
3883                 else
3884                         priv->running_bsses &= ~(1 << mwl8k_vif->macid);
3885         }
3886         return rc;
3887 }
3888
3889 static void mwl8k_enable_bsses(struct ieee80211_hw *hw, bool enable, u32 bitmap)
3890 {
3891         struct mwl8k_priv *priv = hw->priv;
3892         struct mwl8k_vif *mwl8k_vif, *tmp_vif;
3893         struct ieee80211_vif *vif;
3894
3895         list_for_each_entry_safe(mwl8k_vif, tmp_vif, &priv->vif_list, list) {
3896                 vif = mwl8k_vif->vif;
3897
3898                 if (!(bitmap & (1 << mwl8k_vif->macid)))
3899                         continue;
3900
3901                 if (vif->type == NL80211_IFTYPE_AP)
3902                         mwl8k_cmd_bss_start(hw, vif, enable);
3903         }
3904 }
3905 /*
3906  * CMD_BASTREAM.
3907  */
3908
3909 /*
3910  * UPSTREAM is tx direction
3911  */
3912 #define BASTREAM_FLAG_DIRECTION_UPSTREAM        0x00
3913 #define BASTREAM_FLAG_IMMEDIATE_TYPE            0x01
3914
3915 enum ba_stream_action_type {
3916         MWL8K_BA_CREATE,
3917         MWL8K_BA_UPDATE,
3918         MWL8K_BA_DESTROY,
3919         MWL8K_BA_FLUSH,
3920         MWL8K_BA_CHECK,
3921 };
3922
3923
3924 struct mwl8k_create_ba_stream {
3925         __le32  flags;
3926         __le32  idle_thrs;
3927         __le32  bar_thrs;
3928         __le32  window_size;
3929         u8      peer_mac_addr[6];
3930         u8      dialog_token;
3931         u8      tid;
3932         u8      queue_id;
3933         u8      param_info;
3934         __le32  ba_context;
3935         u8      reset_seq_no_flag;
3936         __le16  curr_seq_no;
3937         u8      sta_src_mac_addr[6];
3938 } __packed;
3939
3940 struct mwl8k_destroy_ba_stream {
3941         __le32  flags;
3942         __le32  ba_context;
3943 } __packed;
3944
3945 struct mwl8k_cmd_bastream {
3946         struct mwl8k_cmd_pkt    header;
3947         __le32  action;
3948         union {
3949                 struct mwl8k_create_ba_stream   create_params;
3950                 struct mwl8k_destroy_ba_stream  destroy_params;
3951         };
3952 } __packed;
3953
3954 static int
3955 mwl8k_check_ba(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream,
3956                struct ieee80211_vif *vif)
3957 {
3958         struct mwl8k_cmd_bastream *cmd;
3959         int rc;
3960
3961         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3962         if (cmd == NULL)
3963                 return -ENOMEM;
3964
3965         cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
3966         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3967
3968         cmd->action = cpu_to_le32(MWL8K_BA_CHECK);
3969
3970         cmd->create_params.queue_id = stream->idx;
3971         memcpy(&cmd->create_params.peer_mac_addr[0], stream->sta->addr,
3972                ETH_ALEN);
3973         cmd->create_params.tid = stream->tid;
3974
3975         cmd->create_params.flags =
3976                 cpu_to_le32(BASTREAM_FLAG_IMMEDIATE_TYPE) |
3977                 cpu_to_le32(BASTREAM_FLAG_DIRECTION_UPSTREAM);
3978
3979         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3980
3981         kfree(cmd);
3982
3983         return rc;
3984 }
3985
3986 static int
3987 mwl8k_create_ba(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream,
3988                 u8 buf_size, struct ieee80211_vif *vif)
3989 {
3990         struct mwl8k_cmd_bastream *cmd;
3991         int rc;
3992
3993         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3994         if (cmd == NULL)
3995                 return -ENOMEM;
3996
3997
3998         cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
3999         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4000
4001         cmd->action = cpu_to_le32(MWL8K_BA_CREATE);
4002
4003         cmd->create_params.bar_thrs = cpu_to_le32((u32)buf_size);
4004         cmd->create_params.window_size = cpu_to_le32((u32)buf_size);
4005         cmd->create_params.queue_id = stream->idx;
4006
4007         memcpy(cmd->create_params.peer_mac_addr, stream->sta->addr, ETH_ALEN);
4008         cmd->create_params.tid = stream->tid;
4009         cmd->create_params.curr_seq_no = cpu_to_le16(0);
4010         cmd->create_params.reset_seq_no_flag = 1;
4011
4012         cmd->create_params.param_info =
4013                 (stream->sta->ht_cap.ampdu_factor &
4014                  IEEE80211_HT_AMPDU_PARM_FACTOR) |
4015                 ((stream->sta->ht_cap.ampdu_density << 2) &
4016                  IEEE80211_HT_AMPDU_PARM_DENSITY);
4017
4018         cmd->create_params.flags =
4019                 cpu_to_le32(BASTREAM_FLAG_IMMEDIATE_TYPE |
4020                                         BASTREAM_FLAG_DIRECTION_UPSTREAM);
4021
4022         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4023
4024         wiphy_debug(hw->wiphy, "Created a BA stream for %pM : tid %d\n",
4025                 stream->sta->addr, stream->tid);
4026         kfree(cmd);
4027
4028         return rc;
4029 }
4030
4031 static void mwl8k_destroy_ba(struct ieee80211_hw *hw,
4032                              u8 idx)
4033 {
4034         struct mwl8k_cmd_bastream *cmd;
4035
4036         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4037         if (cmd == NULL)
4038                 return;
4039
4040         cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
4041         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4042         cmd->action = cpu_to_le32(MWL8K_BA_DESTROY);
4043
4044         cmd->destroy_params.ba_context = cpu_to_le32(idx);
4045         mwl8k_post_cmd(hw, &cmd->header);
4046
4047         wiphy_debug(hw->wiphy, "Deleted BA stream index %d\n", idx);
4048
4049         kfree(cmd);
4050 }
4051
4052 /*
4053  * CMD_SET_NEW_STN.
4054  */
4055 struct mwl8k_cmd_set_new_stn {
4056         struct mwl8k_cmd_pkt header;
4057         __le16 aid;
4058         __u8 mac_addr[6];
4059         __le16 stn_id;
4060         __le16 action;
4061         __le16 rsvd;
4062         __le32 legacy_rates;
4063         __u8 ht_rates[4];
4064         __le16 cap_info;
4065         __le16 ht_capabilities_info;
4066         __u8 mac_ht_param_info;
4067         __u8 rev;
4068         __u8 control_channel;
4069         __u8 add_channel;
4070         __le16 op_mode;
4071         __le16 stbc;
4072         __u8 add_qos_info;
4073         __u8 is_qos_sta;
4074         __le32 fw_sta_ptr;
4075 } __packed;
4076
4077 #define MWL8K_STA_ACTION_ADD            0
4078 #define MWL8K_STA_ACTION_REMOVE         2
4079
4080 static int mwl8k_cmd_set_new_stn_add(struct ieee80211_hw *hw,
4081                                      struct ieee80211_vif *vif,
4082                                      struct ieee80211_sta *sta)
4083 {
4084         struct mwl8k_cmd_set_new_stn *cmd;
4085         u32 rates;
4086         int rc;
4087
4088         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4089         if (cmd == NULL)
4090                 return -ENOMEM;
4091
4092         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4093         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4094         cmd->aid = cpu_to_le16(sta->aid);
4095         memcpy(cmd->mac_addr, sta->addr, ETH_ALEN);
4096         cmd->stn_id = cpu_to_le16(sta->aid);
4097         cmd->action = cpu_to_le16(MWL8K_STA_ACTION_ADD);
4098         if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ)
4099                 rates = sta->supp_rates[NL80211_BAND_2GHZ];
4100         else
4101                 rates = sta->supp_rates[NL80211_BAND_5GHZ] << 5;
4102         cmd->legacy_rates = cpu_to_le32(rates);
4103         if (sta->ht_cap.ht_supported) {
4104                 cmd->ht_rates[0] = sta->ht_cap.mcs.rx_mask[0];
4105                 cmd->ht_rates[1] = sta->ht_cap.mcs.rx_mask[1];
4106                 cmd->ht_rates[2] = sta->ht_cap.mcs.rx_mask[2];
4107                 cmd->ht_rates[3] = sta->ht_cap.mcs.rx_mask[3];
4108                 cmd->ht_capabilities_info = cpu_to_le16(sta->ht_cap.cap);
4109                 cmd->mac_ht_param_info = (sta->ht_cap.ampdu_factor & 3) |
4110                         ((sta->ht_cap.ampdu_density & 7) << 2);
4111                 cmd->is_qos_sta = 1;
4112         }
4113
4114         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4115         kfree(cmd);
4116
4117         return rc;
4118 }
4119
4120 static int mwl8k_cmd_set_new_stn_add_self(struct ieee80211_hw *hw,
4121                                           struct ieee80211_vif *vif)
4122 {
4123         struct mwl8k_cmd_set_new_stn *cmd;
4124         int rc;
4125
4126         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4127         if (cmd == NULL)
4128                 return -ENOMEM;
4129
4130         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4131         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4132         memcpy(cmd->mac_addr, vif->addr, ETH_ALEN);
4133
4134         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4135         kfree(cmd);
4136
4137         return rc;
4138 }
4139
4140 static int mwl8k_cmd_set_new_stn_del(struct ieee80211_hw *hw,
4141                                      struct ieee80211_vif *vif, u8 *addr)
4142 {
4143         struct mwl8k_cmd_set_new_stn *cmd;
4144         struct mwl8k_priv *priv = hw->priv;
4145         int rc, i;
4146         u8 idx;
4147
4148         spin_lock(&priv->stream_lock);
4149         /* Destroy any active ampdu streams for this sta */
4150         for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
4151                 struct mwl8k_ampdu_stream *s;
4152                 s = &priv->ampdu[i];
4153                 if (s->state != AMPDU_NO_STREAM) {
4154                         if (memcmp(s->sta->addr, addr, ETH_ALEN) == 0) {
4155                                 if (s->state == AMPDU_STREAM_ACTIVE) {
4156                                         idx = s->idx;
4157                                         spin_unlock(&priv->stream_lock);
4158                                         mwl8k_destroy_ba(hw, idx);
4159                                         spin_lock(&priv->stream_lock);
4160                                 } else if (s->state == AMPDU_STREAM_NEW) {
4161                                         mwl8k_remove_stream(hw, s);
4162                                 }
4163                         }
4164                 }
4165         }
4166
4167         spin_unlock(&priv->stream_lock);
4168
4169         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4170         if (cmd == NULL)
4171                 return -ENOMEM;
4172
4173         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4174         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4175         memcpy(cmd->mac_addr, addr, ETH_ALEN);
4176         cmd->action = cpu_to_le16(MWL8K_STA_ACTION_REMOVE);
4177
4178         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4179         kfree(cmd);
4180
4181         return rc;
4182 }
4183
4184 /*
4185  * CMD_UPDATE_ENCRYPTION.
4186  */
4187
4188 #define MAX_ENCR_KEY_LENGTH     16
4189 #define MIC_KEY_LENGTH          8
4190
4191 struct mwl8k_cmd_update_encryption {
4192         struct mwl8k_cmd_pkt header;
4193
4194         __le32 action;
4195         __le32 reserved;
4196         __u8 mac_addr[6];
4197         __u8 encr_type;
4198
4199 } __packed;
4200
4201 struct mwl8k_cmd_set_key {
4202         struct mwl8k_cmd_pkt header;
4203
4204         __le32 action;
4205         __le32 reserved;
4206         __le16 length;
4207         __le16 key_type_id;
4208         __le32 key_info;
4209         __le32 key_id;
4210         __le16 key_len;
4211         __u8 key_material[MAX_ENCR_KEY_LENGTH];
4212         __u8 tkip_tx_mic_key[MIC_KEY_LENGTH];
4213         __u8 tkip_rx_mic_key[MIC_KEY_LENGTH];
4214         __le16 tkip_rsc_low;
4215         __le32 tkip_rsc_high;
4216         __le16 tkip_tsc_low;
4217         __le32 tkip_tsc_high;
4218         __u8 mac_addr[6];
4219 } __packed;
4220
4221 enum {
4222         MWL8K_ENCR_ENABLE,
4223         MWL8K_ENCR_SET_KEY,
4224         MWL8K_ENCR_REMOVE_KEY,
4225         MWL8K_ENCR_SET_GROUP_KEY,
4226 };
4227
4228 #define MWL8K_UPDATE_ENCRYPTION_TYPE_WEP        0
4229 #define MWL8K_UPDATE_ENCRYPTION_TYPE_DISABLE    1
4230 #define MWL8K_UPDATE_ENCRYPTION_TYPE_TKIP       4
4231 #define MWL8K_UPDATE_ENCRYPTION_TYPE_MIXED      7
4232 #define MWL8K_UPDATE_ENCRYPTION_TYPE_AES        8
4233
4234 enum {
4235         MWL8K_ALG_WEP,
4236         MWL8K_ALG_TKIP,
4237         MWL8K_ALG_CCMP,
4238 };
4239
4240 #define MWL8K_KEY_FLAG_TXGROUPKEY       0x00000004
4241 #define MWL8K_KEY_FLAG_PAIRWISE         0x00000008
4242 #define MWL8K_KEY_FLAG_TSC_VALID        0x00000040
4243 #define MWL8K_KEY_FLAG_WEP_TXKEY        0x01000000
4244 #define MWL8K_KEY_FLAG_MICKEY_VALID     0x02000000
4245
4246 static int mwl8k_cmd_update_encryption_enable(struct ieee80211_hw *hw,
4247                                               struct ieee80211_vif *vif,
4248                                               u8 *addr,
4249                                               u8 encr_type)
4250 {
4251         struct mwl8k_cmd_update_encryption *cmd;
4252         int rc;
4253
4254         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4255         if (cmd == NULL)
4256                 return -ENOMEM;
4257
4258         cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_ENCRYPTION);
4259         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4260         cmd->action = cpu_to_le32(MWL8K_ENCR_ENABLE);
4261         memcpy(cmd->mac_addr, addr, ETH_ALEN);
4262         cmd->encr_type = encr_type;
4263
4264         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4265         kfree(cmd);
4266
4267         return rc;
4268 }
4269
4270 static int mwl8k_encryption_set_cmd_info(struct mwl8k_cmd_set_key *cmd,
4271                                                 u8 *addr,
4272                                                 struct ieee80211_key_conf *key)
4273 {
4274         cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_ENCRYPTION);
4275         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4276         cmd->length = cpu_to_le16(sizeof(*cmd) -
4277                                 offsetof(struct mwl8k_cmd_set_key, length));
4278         cmd->key_id = cpu_to_le32(key->keyidx);
4279         cmd->key_len = cpu_to_le16(key->keylen);
4280         memcpy(cmd->mac_addr, addr, ETH_ALEN);
4281
4282         switch (key->cipher) {
4283         case WLAN_CIPHER_SUITE_WEP40:
4284         case WLAN_CIPHER_SUITE_WEP104:
4285                 cmd->key_type_id = cpu_to_le16(MWL8K_ALG_WEP);
4286                 if (key->keyidx == 0)
4287                         cmd->key_info = cpu_to_le32(MWL8K_KEY_FLAG_WEP_TXKEY);
4288
4289                 break;
4290         case WLAN_CIPHER_SUITE_TKIP:
4291                 cmd->key_type_id = cpu_to_le16(MWL8K_ALG_TKIP);
4292                 cmd->key_info = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4293                         ? cpu_to_le32(MWL8K_KEY_FLAG_PAIRWISE)
4294                         : cpu_to_le32(MWL8K_KEY_FLAG_TXGROUPKEY);
4295                 cmd->key_info |= cpu_to_le32(MWL8K_KEY_FLAG_MICKEY_VALID
4296                                                 | MWL8K_KEY_FLAG_TSC_VALID);
4297                 break;
4298         case WLAN_CIPHER_SUITE_CCMP:
4299                 cmd->key_type_id = cpu_to_le16(MWL8K_ALG_CCMP);
4300                 cmd->key_info = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4301                         ? cpu_to_le32(MWL8K_KEY_FLAG_PAIRWISE)
4302                         : cpu_to_le32(MWL8K_KEY_FLAG_TXGROUPKEY);
4303                 break;
4304         default:
4305                 return -ENOTSUPP;
4306         }
4307
4308         return 0;
4309 }
4310
4311 static int mwl8k_cmd_encryption_set_key(struct ieee80211_hw *hw,
4312                                                 struct ieee80211_vif *vif,
4313                                                 u8 *addr,
4314                                                 struct ieee80211_key_conf *key)
4315 {
4316         struct mwl8k_cmd_set_key *cmd;
4317         int rc;
4318         int keymlen;
4319         u32 action;
4320         u8 idx;
4321         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4322
4323         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4324         if (cmd == NULL)
4325                 return -ENOMEM;
4326
4327         rc = mwl8k_encryption_set_cmd_info(cmd, addr, key);
4328         if (rc < 0)
4329                 goto done;
4330
4331         idx = key->keyidx;
4332
4333         if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4334                 action = MWL8K_ENCR_SET_KEY;
4335         else
4336                 action = MWL8K_ENCR_SET_GROUP_KEY;
4337
4338         switch (key->cipher) {
4339         case WLAN_CIPHER_SUITE_WEP40:
4340         case WLAN_CIPHER_SUITE_WEP104:
4341                 if (!mwl8k_vif->wep_key_conf[idx].enabled) {
4342                         memcpy(mwl8k_vif->wep_key_conf[idx].key, key,
4343                                                 sizeof(*key) + key->keylen);
4344                         mwl8k_vif->wep_key_conf[idx].enabled = 1;
4345                 }
4346
4347                 keymlen = key->keylen;
4348                 action = MWL8K_ENCR_SET_KEY;
4349                 break;
4350         case WLAN_CIPHER_SUITE_TKIP:
4351                 keymlen = MAX_ENCR_KEY_LENGTH + 2 * MIC_KEY_LENGTH;
4352                 break;
4353         case WLAN_CIPHER_SUITE_CCMP:
4354                 keymlen = key->keylen;
4355                 break;
4356         default:
4357                 rc = -ENOTSUPP;
4358                 goto done;
4359         }
4360
4361         memcpy(cmd->key_material, key->key, keymlen);
4362         cmd->action = cpu_to_le32(action);
4363
4364         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4365 done:
4366         kfree(cmd);
4367
4368         return rc;
4369 }
4370
4371 static int mwl8k_cmd_encryption_remove_key(struct ieee80211_hw *hw,
4372                                                 struct ieee80211_vif *vif,
4373                                                 u8 *addr,
4374                                                 struct ieee80211_key_conf *key)
4375 {
4376         struct mwl8k_cmd_set_key *cmd;
4377         int rc;
4378         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4379
4380         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4381         if (cmd == NULL)
4382                 return -ENOMEM;
4383
4384         rc = mwl8k_encryption_set_cmd_info(cmd, addr, key);
4385         if (rc < 0)
4386                 goto done;
4387
4388         if (key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
4389                         key->cipher == WLAN_CIPHER_SUITE_WEP104)
4390                 mwl8k_vif->wep_key_conf[key->keyidx].enabled = 0;
4391
4392         cmd->action = cpu_to_le32(MWL8K_ENCR_REMOVE_KEY);
4393
4394         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4395 done:
4396         kfree(cmd);
4397
4398         return rc;
4399 }
4400
4401 static int mwl8k_set_key(struct ieee80211_hw *hw,
4402                          enum set_key_cmd cmd_param,
4403                          struct ieee80211_vif *vif,
4404                          struct ieee80211_sta *sta,
4405                          struct ieee80211_key_conf *key)
4406 {
4407         int rc = 0;
4408         u8 encr_type;
4409         u8 *addr;
4410         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4411         struct mwl8k_priv *priv = hw->priv;
4412
4413         if (vif->type == NL80211_IFTYPE_STATION && !priv->ap_fw)
4414                 return -EOPNOTSUPP;
4415
4416         if (sta == NULL)
4417                 addr = vif->addr;
4418         else
4419                 addr = sta->addr;
4420
4421         if (cmd_param == SET_KEY) {
4422                 rc = mwl8k_cmd_encryption_set_key(hw, vif, addr, key);
4423                 if (rc)
4424                         goto out;
4425
4426                 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40)
4427                                 || (key->cipher == WLAN_CIPHER_SUITE_WEP104))
4428                         encr_type = MWL8K_UPDATE_ENCRYPTION_TYPE_WEP;
4429                 else
4430                         encr_type = MWL8K_UPDATE_ENCRYPTION_TYPE_MIXED;
4431
4432                 rc = mwl8k_cmd_update_encryption_enable(hw, vif, addr,
4433                                                                 encr_type);
4434                 if (rc)
4435                         goto out;
4436
4437                 mwl8k_vif->is_hw_crypto_enabled = true;
4438
4439         } else {
4440                 rc = mwl8k_cmd_encryption_remove_key(hw, vif, addr, key);
4441
4442                 if (rc)
4443                         goto out;
4444         }
4445 out:
4446         return rc;
4447 }
4448
4449 /*
4450  * CMD_UPDATE_STADB.
4451  */
4452 struct ewc_ht_info {
4453         __le16  control1;
4454         __le16  control2;
4455         __le16  control3;
4456 } __packed;
4457
4458 struct peer_capability_info {
4459         /* Peer type - AP vs. STA.  */
4460         __u8    peer_type;
4461
4462         /* Basic 802.11 capabilities from assoc resp.  */
4463         __le16  basic_caps;
4464
4465         /* Set if peer supports 802.11n high throughput (HT).  */
4466         __u8    ht_support;
4467
4468         /* Valid if HT is supported.  */
4469         __le16  ht_caps;
4470         __u8    extended_ht_caps;
4471         struct ewc_ht_info      ewc_info;
4472
4473         /* Legacy rate table. Intersection of our rates and peer rates.  */
4474         __u8    legacy_rates[12];
4475
4476         /* HT rate table. Intersection of our rates and peer rates.  */
4477         __u8    ht_rates[16];
4478         __u8    pad[16];
4479
4480         /* If set, interoperability mode, no proprietary extensions.  */
4481         __u8    interop;
4482         __u8    pad2;
4483         __u8    station_id;
4484         __le16  amsdu_enabled;
4485 } __packed;
4486
4487 struct mwl8k_cmd_update_stadb {
4488         struct mwl8k_cmd_pkt header;
4489
4490         /* See STADB_ACTION_TYPE */
4491         __le32  action;
4492
4493         /* Peer MAC address */
4494         __u8    peer_addr[ETH_ALEN];
4495
4496         __le32  reserved;
4497
4498         /* Peer info - valid during add/update.  */
4499         struct peer_capability_info     peer_info;
4500 } __packed;
4501
4502 #define MWL8K_STA_DB_MODIFY_ENTRY       1
4503 #define MWL8K_STA_DB_DEL_ENTRY          2
4504
4505 /* Peer Entry flags - used to define the type of the peer node */
4506 #define MWL8K_PEER_TYPE_ACCESSPOINT     2
4507
4508 static int mwl8k_cmd_update_stadb_add(struct ieee80211_hw *hw,
4509                                       struct ieee80211_vif *vif,
4510                                       struct ieee80211_sta *sta)
4511 {
4512         struct mwl8k_cmd_update_stadb *cmd;
4513         struct peer_capability_info *p;
4514         u32 rates;
4515         int rc;
4516
4517         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4518         if (cmd == NULL)
4519                 return -ENOMEM;
4520
4521         cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_STADB);
4522         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4523         cmd->action = cpu_to_le32(MWL8K_STA_DB_MODIFY_ENTRY);
4524         memcpy(cmd->peer_addr, sta->addr, ETH_ALEN);
4525
4526         p = &cmd->peer_info;
4527         p->peer_type = MWL8K_PEER_TYPE_ACCESSPOINT;
4528         p->basic_caps = cpu_to_le16(vif->bss_conf.assoc_capability);
4529         p->ht_support = sta->ht_cap.ht_supported;
4530         p->ht_caps = cpu_to_le16(sta->ht_cap.cap);
4531         p->extended_ht_caps = (sta->ht_cap.ampdu_factor & 3) |
4532                 ((sta->ht_cap.ampdu_density & 7) << 2);
4533         if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ)
4534                 rates = sta->supp_rates[NL80211_BAND_2GHZ];
4535         else
4536                 rates = sta->supp_rates[NL80211_BAND_5GHZ] << 5;
4537         legacy_rate_mask_to_array(p->legacy_rates, rates);
4538         memcpy(p->ht_rates, sta->ht_cap.mcs.rx_mask, 16);
4539         p->interop = 1;
4540         p->amsdu_enabled = 0;
4541
4542         rc = mwl8k_post_cmd(hw, &cmd->header);
4543         if (!rc)
4544                 rc = p->station_id;
4545         kfree(cmd);
4546
4547         return rc;
4548 }
4549
4550 static int mwl8k_cmd_update_stadb_del(struct ieee80211_hw *hw,
4551                                       struct ieee80211_vif *vif, u8 *addr)
4552 {
4553         struct mwl8k_cmd_update_stadb *cmd;
4554         int rc;
4555
4556         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4557         if (cmd == NULL)
4558                 return -ENOMEM;
4559
4560         cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_STADB);
4561         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4562         cmd->action = cpu_to_le32(MWL8K_STA_DB_DEL_ENTRY);
4563         memcpy(cmd->peer_addr, addr, ETH_ALEN);
4564
4565         rc = mwl8k_post_cmd(hw, &cmd->header);
4566         kfree(cmd);
4567
4568         return rc;
4569 }
4570
4571
4572 /*
4573  * Interrupt handling.
4574  */
4575 static irqreturn_t mwl8k_interrupt(int irq, void *dev_id)
4576 {
4577         struct ieee80211_hw *hw = dev_id;
4578         struct mwl8k_priv *priv = hw->priv;
4579         u32 status;
4580
4581         status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4582         if (!status)
4583                 return IRQ_NONE;
4584
4585         if (status & MWL8K_A2H_INT_TX_DONE) {
4586                 status &= ~MWL8K_A2H_INT_TX_DONE;
4587                 tasklet_schedule(&priv->poll_tx_task);
4588         }
4589
4590         if (status & MWL8K_A2H_INT_RX_READY) {
4591                 status &= ~MWL8K_A2H_INT_RX_READY;
4592                 tasklet_schedule(&priv->poll_rx_task);
4593         }
4594
4595         if (status & MWL8K_A2H_INT_BA_WATCHDOG) {
4596                 iowrite32(~MWL8K_A2H_INT_BA_WATCHDOG,
4597                           priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
4598
4599                 atomic_inc(&priv->watchdog_event_pending);
4600                 status &= ~MWL8K_A2H_INT_BA_WATCHDOG;
4601                 ieee80211_queue_work(hw, &priv->watchdog_ba_handle);
4602         }
4603
4604         if (status)
4605                 iowrite32(~status, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4606
4607         if (status & MWL8K_A2H_INT_OPC_DONE) {
4608                 if (priv->hostcmd_wait != NULL)
4609                         complete(priv->hostcmd_wait);
4610         }
4611
4612         if (status & MWL8K_A2H_INT_QUEUE_EMPTY) {
4613                 if (!mutex_is_locked(&priv->fw_mutex) &&
4614                     priv->radio_on && priv->pending_tx_pkts)
4615                         mwl8k_tx_start(priv);
4616         }
4617
4618         return IRQ_HANDLED;
4619 }
4620
4621 static void mwl8k_tx_poll(unsigned long data)
4622 {
4623         struct ieee80211_hw *hw = (struct ieee80211_hw *)data;
4624         struct mwl8k_priv *priv = hw->priv;
4625         int limit;
4626         int i;
4627
4628         limit = 32;
4629
4630         spin_lock_bh(&priv->tx_lock);
4631
4632         for (i = 0; i < mwl8k_tx_queues(priv); i++)
4633                 limit -= mwl8k_txq_reclaim(hw, i, limit, 0);
4634
4635         if (!priv->pending_tx_pkts && priv->tx_wait != NULL) {
4636                 complete(priv->tx_wait);
4637                 priv->tx_wait = NULL;
4638         }
4639
4640         spin_unlock_bh(&priv->tx_lock);
4641
4642         if (limit) {
4643                 writel(~MWL8K_A2H_INT_TX_DONE,
4644                        priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4645         } else {
4646                 tasklet_schedule(&priv->poll_tx_task);
4647         }
4648 }
4649
4650 static void mwl8k_rx_poll(unsigned long data)
4651 {
4652         struct ieee80211_hw *hw = (struct ieee80211_hw *)data;
4653         struct mwl8k_priv *priv = hw->priv;
4654         int limit;
4655
4656         limit = 32;
4657         limit -= rxq_process(hw, 0, limit);
4658         limit -= rxq_refill(hw, 0, limit);
4659
4660         if (limit) {
4661                 writel(~MWL8K_A2H_INT_RX_READY,
4662                        priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4663         } else {
4664                 tasklet_schedule(&priv->poll_rx_task);
4665         }
4666 }
4667
4668
4669 /*
4670  * Core driver operations.
4671  */
4672 static void mwl8k_tx(struct ieee80211_hw *hw,
4673                      struct ieee80211_tx_control *control,
4674                      struct sk_buff *skb)
4675 {
4676         struct mwl8k_priv *priv = hw->priv;
4677         int index = skb_get_queue_mapping(skb);
4678
4679         if (!priv->radio_on) {
4680                 wiphy_debug(hw->wiphy,
4681                             "dropped TX frame since radio disabled\n");
4682                 dev_kfree_skb(skb);
4683                 return;
4684         }
4685
4686         mwl8k_txq_xmit(hw, index, control->sta, skb);
4687 }
4688
4689 static int mwl8k_start(struct ieee80211_hw *hw)
4690 {
4691         struct mwl8k_priv *priv = hw->priv;
4692         int rc;
4693
4694         rc = request_irq(priv->pdev->irq, mwl8k_interrupt,
4695                          IRQF_SHARED, MWL8K_NAME, hw);
4696         if (rc) {
4697                 priv->irq = -1;
4698                 wiphy_err(hw->wiphy, "failed to register IRQ handler\n");
4699                 return -EIO;
4700         }
4701         priv->irq = priv->pdev->irq;
4702
4703         /* Enable TX reclaim and RX tasklets.  */
4704         tasklet_enable(&priv->poll_tx_task);
4705         tasklet_enable(&priv->poll_rx_task);
4706
4707         /* Enable interrupts */
4708         iowrite32(MWL8K_A2H_EVENTS, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4709         iowrite32(MWL8K_A2H_EVENTS,
4710                   priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
4711
4712         rc = mwl8k_fw_lock(hw);
4713         if (!rc) {
4714                 rc = mwl8k_cmd_radio_enable(hw);
4715
4716                 if (!priv->ap_fw) {
4717                         if (!rc)
4718                                 rc = mwl8k_cmd_enable_sniffer(hw, 0);
4719
4720                         if (!rc)
4721                                 rc = mwl8k_cmd_set_pre_scan(hw);
4722
4723                         if (!rc)
4724                                 rc = mwl8k_cmd_set_post_scan(hw,
4725                                                 "\x00\x00\x00\x00\x00\x00");
4726                 }
4727
4728                 if (!rc)
4729                         rc = mwl8k_cmd_set_rateadapt_mode(hw, 0);
4730
4731                 if (!rc)
4732                         rc = mwl8k_cmd_set_wmm_mode(hw, 0);
4733
4734                 mwl8k_fw_unlock(hw);
4735         }
4736
4737         if (rc) {
4738                 iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4739                 free_irq(priv->pdev->irq, hw);
4740                 priv->irq = -1;
4741                 tasklet_disable(&priv->poll_tx_task);
4742                 tasklet_disable(&priv->poll_rx_task);
4743         } else {
4744                 ieee80211_wake_queues(hw);
4745         }
4746
4747         return rc;
4748 }
4749
4750 static void mwl8k_stop(struct ieee80211_hw *hw)
4751 {
4752         struct mwl8k_priv *priv = hw->priv;
4753         int i;
4754
4755         if (!priv->hw_restart_in_progress)
4756                 mwl8k_cmd_radio_disable(hw);
4757
4758         ieee80211_stop_queues(hw);
4759
4760         /* Disable interrupts */
4761         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4762         if (priv->irq != -1) {
4763                 free_irq(priv->pdev->irq, hw);
4764                 priv->irq = -1;
4765         }
4766
4767         /* Stop finalize join worker */
4768         cancel_work_sync(&priv->finalize_join_worker);
4769         cancel_work_sync(&priv->watchdog_ba_handle);
4770         if (priv->beacon_skb != NULL)
4771                 dev_kfree_skb(priv->beacon_skb);
4772
4773         /* Stop TX reclaim and RX tasklets.  */
4774         tasklet_disable(&priv->poll_tx_task);
4775         tasklet_disable(&priv->poll_rx_task);
4776
4777         /* Return all skbs to mac80211 */
4778         for (i = 0; i < mwl8k_tx_queues(priv); i++)
4779                 mwl8k_txq_reclaim(hw, i, INT_MAX, 1);
4780 }
4781
4782 static int mwl8k_reload_firmware(struct ieee80211_hw *hw, char *fw_image);
4783
4784 static int mwl8k_add_interface(struct ieee80211_hw *hw,
4785                                struct ieee80211_vif *vif)
4786 {
4787         struct mwl8k_priv *priv = hw->priv;
4788         struct mwl8k_vif *mwl8k_vif;
4789         u32 macids_supported;
4790         int macid, rc;
4791         struct mwl8k_device_info *di;
4792
4793         /*
4794          * Reject interface creation if sniffer mode is active, as
4795          * STA operation is mutually exclusive with hardware sniffer
4796          * mode.  (Sniffer mode is only used on STA firmware.)
4797          */
4798         if (priv->sniffer_enabled) {
4799                 wiphy_info(hw->wiphy,
4800                            "unable to create STA interface because sniffer mode is enabled\n");
4801                 return -EINVAL;
4802         }
4803
4804         di = priv->device_info;
4805         switch (vif->type) {
4806         case NL80211_IFTYPE_AP:
4807                 if (!priv->ap_fw && di->fw_image_ap) {
4808                         /* we must load the ap fw to meet this request */
4809                         if (!list_empty(&priv->vif_list))
4810                                 return -EBUSY;
4811                         rc = mwl8k_reload_firmware(hw, di->fw_image_ap);
4812                         if (rc)
4813                                 return rc;
4814                 }
4815                 macids_supported = priv->ap_macids_supported;
4816                 break;
4817         case NL80211_IFTYPE_STATION:
4818                 if (priv->ap_fw && di->fw_image_sta) {
4819                         if (!list_empty(&priv->vif_list)) {
4820                                 wiphy_warn(hw->wiphy, "AP interface is running.\n"
4821                                            "Adding STA interface for WDS");
4822                         } else {
4823                                 /* we must load the sta fw to
4824                                  * meet this request.
4825                                  */
4826                                 rc = mwl8k_reload_firmware(hw,
4827                                                            di->fw_image_sta);
4828                                 if (rc)
4829                                         return rc;
4830                         }
4831                 }
4832                 macids_supported = priv->sta_macids_supported;
4833                 break;
4834         default:
4835                 return -EINVAL;
4836         }
4837
4838         macid = ffs(macids_supported & ~priv->macids_used);
4839         if (!macid--)
4840                 return -EBUSY;
4841
4842         /* Setup driver private area. */
4843         mwl8k_vif = MWL8K_VIF(vif);
4844         memset(mwl8k_vif, 0, sizeof(*mwl8k_vif));
4845         mwl8k_vif->vif = vif;
4846         mwl8k_vif->macid = macid;
4847         mwl8k_vif->seqno = 0;
4848         memcpy(mwl8k_vif->bssid, vif->addr, ETH_ALEN);
4849         mwl8k_vif->is_hw_crypto_enabled = false;
4850
4851         /* Set the mac address.  */
4852         mwl8k_cmd_set_mac_addr(hw, vif, vif->addr);
4853
4854         if (vif->type == NL80211_IFTYPE_AP)
4855                 mwl8k_cmd_set_new_stn_add_self(hw, vif);
4856
4857         priv->macids_used |= 1 << mwl8k_vif->macid;
4858         list_add_tail(&mwl8k_vif->list, &priv->vif_list);
4859
4860         return 0;
4861 }
4862
4863 static void mwl8k_remove_vif(struct mwl8k_priv *priv, struct mwl8k_vif *vif)
4864 {
4865         /* Has ieee80211_restart_hw re-added the removed interfaces? */
4866         if (!priv->macids_used)
4867                 return;
4868
4869         priv->macids_used &= ~(1 << vif->macid);
4870         list_del(&vif->list);
4871 }
4872
4873 static void mwl8k_remove_interface(struct ieee80211_hw *hw,
4874                                    struct ieee80211_vif *vif)
4875 {
4876         struct mwl8k_priv *priv = hw->priv;
4877         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4878
4879         if (vif->type == NL80211_IFTYPE_AP)
4880                 mwl8k_cmd_set_new_stn_del(hw, vif, vif->addr);
4881
4882         mwl8k_cmd_del_mac_addr(hw, vif, vif->addr);
4883
4884         mwl8k_remove_vif(priv, mwl8k_vif);
4885 }
4886
4887 static void mwl8k_hw_restart_work(struct work_struct *work)
4888 {
4889         struct mwl8k_priv *priv =
4890                 container_of(work, struct mwl8k_priv, fw_reload);
4891         struct ieee80211_hw *hw = priv->hw;
4892         struct mwl8k_device_info *di;
4893         int rc;
4894
4895         /* If some command is waiting for a response, clear it */
4896         if (priv->hostcmd_wait != NULL) {
4897                 complete(priv->hostcmd_wait);
4898                 priv->hostcmd_wait = NULL;
4899         }
4900
4901         priv->hw_restart_owner = current;
4902         di = priv->device_info;
4903         mwl8k_fw_lock(hw);
4904
4905         if (priv->ap_fw)
4906                 rc = mwl8k_reload_firmware(hw, di->fw_image_ap);
4907         else
4908                 rc = mwl8k_reload_firmware(hw, di->fw_image_sta);
4909
4910         if (rc)
4911                 goto fail;
4912
4913         priv->hw_restart_owner = NULL;
4914         priv->hw_restart_in_progress = false;
4915
4916         /*
4917          * This unlock will wake up the queues and
4918          * also opens the command path for other
4919          * commands
4920          */
4921         mwl8k_fw_unlock(hw);
4922
4923         ieee80211_restart_hw(hw);
4924
4925         wiphy_err(hw->wiphy, "Firmware restarted successfully\n");
4926
4927         return;
4928 fail:
4929         mwl8k_fw_unlock(hw);
4930
4931         wiphy_err(hw->wiphy, "Firmware restart failed\n");
4932 }
4933
4934 static int mwl8k_config(struct ieee80211_hw *hw, u32 changed)
4935 {
4936         struct ieee80211_conf *conf = &hw->conf;
4937         struct mwl8k_priv *priv = hw->priv;
4938         int rc;
4939
4940         rc = mwl8k_fw_lock(hw);
4941         if (rc)
4942                 return rc;
4943
4944         if (conf->flags & IEEE80211_CONF_IDLE)
4945                 rc = mwl8k_cmd_radio_disable(hw);
4946         else
4947                 rc = mwl8k_cmd_radio_enable(hw);
4948         if (rc)
4949                 goto out;
4950
4951         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
4952                 rc = mwl8k_cmd_set_rf_channel(hw, conf);
4953                 if (rc)
4954                         goto out;
4955         }
4956
4957         if (conf->power_level > 18)
4958                 conf->power_level = 18;
4959
4960         if (priv->ap_fw) {
4961
4962                 if (conf->flags & IEEE80211_CONF_CHANGE_POWER) {
4963                         rc = mwl8k_cmd_tx_power(hw, conf, conf->power_level);
4964                         if (rc)
4965                                 goto out;
4966                 }
4967
4968
4969         } else {
4970                 rc = mwl8k_cmd_rf_tx_power(hw, conf->power_level);
4971                 if (rc)
4972                         goto out;
4973                 rc = mwl8k_cmd_mimo_config(hw, 0x7, 0x7);
4974         }
4975
4976 out:
4977         mwl8k_fw_unlock(hw);
4978
4979         return rc;
4980 }
4981
4982 static void
4983 mwl8k_bss_info_changed_sta(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4984                            struct ieee80211_bss_conf *info, u32 changed)
4985 {
4986         struct mwl8k_priv *priv = hw->priv;
4987         u32 ap_legacy_rates = 0;
4988         u8 ap_mcs_rates[16];
4989         int rc;
4990
4991         if (mwl8k_fw_lock(hw))
4992                 return;
4993
4994         /*
4995          * No need to capture a beacon if we're no longer associated.
4996          */
4997         if ((changed & BSS_CHANGED_ASSOC) && !vif->bss_conf.assoc)
4998                 priv->capture_beacon = false;
4999
5000         /*
5001          * Get the AP's legacy and MCS rates.
5002          */
5003         if (vif->bss_conf.assoc) {
5004                 struct ieee80211_sta *ap;
5005
5006                 rcu_read_lock();
5007
5008                 ap = ieee80211_find_sta(vif, vif->bss_conf.bssid);
5009                 if (ap == NULL) {
5010                         rcu_read_unlock();
5011                         goto out;
5012                 }
5013
5014                 if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ) {
5015                         ap_legacy_rates = ap->supp_rates[NL80211_BAND_2GHZ];
5016                 } else {
5017                         ap_legacy_rates =
5018                                 ap->supp_rates[NL80211_BAND_5GHZ] << 5;
5019                 }
5020                 memcpy(ap_mcs_rates, ap->ht_cap.mcs.rx_mask, 16);
5021
5022                 rcu_read_unlock();
5023
5024                 if (changed & BSS_CHANGED_ASSOC) {
5025                         if (!priv->ap_fw) {
5026                                 rc = mwl8k_cmd_set_rate(hw, vif,
5027                                                         ap_legacy_rates,
5028                                                         ap_mcs_rates);
5029                                 if (rc)
5030                                         goto out;
5031
5032                                 rc = mwl8k_cmd_use_fixed_rate_sta(hw);
5033                                 if (rc)
5034                                         goto out;
5035                         } else {
5036                                 int idx;
5037                                 int rate;
5038
5039                                 /* Use AP firmware specific rate command.
5040                                  */
5041                                 idx = ffs(vif->bss_conf.basic_rates);
5042                                 if (idx)
5043                                         idx--;
5044
5045                                 if (hw->conf.chandef.chan->band ==
5046                                     NL80211_BAND_2GHZ)
5047                                         rate = mwl8k_rates_24[idx].hw_value;
5048                                 else
5049                                         rate = mwl8k_rates_50[idx].hw_value;
5050
5051                                 mwl8k_cmd_use_fixed_rate_ap(hw, rate, rate);
5052                         }
5053                 }
5054         }
5055
5056         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
5057                 rc = mwl8k_set_radio_preamble(hw,
5058                                 vif->bss_conf.use_short_preamble);
5059                 if (rc)
5060                         goto out;
5061         }
5062
5063         if ((changed & BSS_CHANGED_ERP_SLOT) && !priv->ap_fw)  {
5064                 rc = mwl8k_cmd_set_slot(hw, vif->bss_conf.use_short_slot);
5065                 if (rc)
5066                         goto out;
5067         }
5068
5069         if (vif->bss_conf.assoc && !priv->ap_fw &&
5070             (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_ERP_CTS_PROT |
5071                         BSS_CHANGED_HT))) {
5072                 rc = mwl8k_cmd_set_aid(hw, vif, ap_legacy_rates);
5073                 if (rc)
5074                         goto out;
5075         }
5076
5077         if (vif->bss_conf.assoc &&
5078             (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_BEACON_INT))) {
5079                 /*
5080                  * Finalize the join.  Tell rx handler to process
5081                  * next beacon from our BSSID.
5082                  */
5083                 memcpy(priv->capture_bssid, vif->bss_conf.bssid, ETH_ALEN);
5084                 priv->capture_beacon = true;
5085         }
5086
5087 out:
5088         mwl8k_fw_unlock(hw);
5089 }
5090
5091 static void
5092 mwl8k_bss_info_changed_ap(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5093                           struct ieee80211_bss_conf *info, u32 changed)
5094 {
5095         int rc;
5096
5097         if (mwl8k_fw_lock(hw))
5098                 return;
5099
5100         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
5101                 rc = mwl8k_set_radio_preamble(hw,
5102                                 vif->bss_conf.use_short_preamble);
5103                 if (rc)
5104                         goto out;
5105         }
5106
5107         if (changed & BSS_CHANGED_BASIC_RATES) {
5108                 int idx;
5109                 int rate;
5110
5111                 /*
5112                  * Use lowest supported basic rate for multicasts
5113                  * and management frames (such as probe responses --
5114                  * beacons will always go out at 1 Mb/s).
5115                  */
5116                 idx = ffs(vif->bss_conf.basic_rates);
5117                 if (idx)
5118                         idx--;
5119
5120                 if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ)
5121                         rate = mwl8k_rates_24[idx].hw_value;
5122                 else
5123                         rate = mwl8k_rates_50[idx].hw_value;
5124
5125                 mwl8k_cmd_use_fixed_rate_ap(hw, rate, rate);
5126         }
5127
5128         if (changed & (BSS_CHANGED_BEACON_INT | BSS_CHANGED_BEACON)) {
5129                 struct sk_buff *skb;
5130
5131                 skb = ieee80211_beacon_get(hw, vif);
5132                 if (skb != NULL) {
5133                         mwl8k_cmd_set_beacon(hw, vif, skb->data, skb->len);
5134                         kfree_skb(skb);
5135                 }
5136         }
5137
5138         if (changed & BSS_CHANGED_BEACON_ENABLED)
5139                 mwl8k_cmd_bss_start(hw, vif, info->enable_beacon);
5140
5141 out:
5142         mwl8k_fw_unlock(hw);
5143 }
5144
5145 static void
5146 mwl8k_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5147                        struct ieee80211_bss_conf *info, u32 changed)
5148 {
5149         if (vif->type == NL80211_IFTYPE_STATION)
5150                 mwl8k_bss_info_changed_sta(hw, vif, info, changed);
5151         if (vif->type == NL80211_IFTYPE_AP)
5152                 mwl8k_bss_info_changed_ap(hw, vif, info, changed);
5153 }
5154
5155 static u64 mwl8k_prepare_multicast(struct ieee80211_hw *hw,
5156                                    struct netdev_hw_addr_list *mc_list)
5157 {
5158         struct mwl8k_cmd_pkt *cmd;
5159
5160         /*
5161          * Synthesize and return a command packet that programs the
5162          * hardware multicast address filter.  At this point we don't
5163          * know whether FIF_ALLMULTI is being requested, but if it is,
5164          * we'll end up throwing this packet away and creating a new
5165          * one in mwl8k_configure_filter().
5166          */
5167         cmd = __mwl8k_cmd_mac_multicast_adr(hw, 0, mc_list);
5168
5169         return (unsigned long)cmd;
5170 }
5171
5172 static int
5173 mwl8k_configure_filter_sniffer(struct ieee80211_hw *hw,
5174                                unsigned int changed_flags,
5175                                unsigned int *total_flags)
5176 {
5177         struct mwl8k_priv *priv = hw->priv;
5178
5179         /*
5180          * Hardware sniffer mode is mutually exclusive with STA
5181          * operation, so refuse to enable sniffer mode if a STA
5182          * interface is active.
5183          */
5184         if (!list_empty(&priv->vif_list)) {
5185                 if (net_ratelimit())
5186                         wiphy_info(hw->wiphy,
5187                                    "not enabling sniffer mode because STA interface is active\n");
5188                 return 0;
5189         }
5190
5191         if (!priv->sniffer_enabled) {
5192                 if (mwl8k_cmd_enable_sniffer(hw, 1))
5193                         return 0;
5194                 priv->sniffer_enabled = true;
5195         }
5196
5197         *total_flags &= FIF_ALLMULTI |
5198                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL |
5199                         FIF_OTHER_BSS;
5200
5201         return 1;
5202 }
5203
5204 static struct mwl8k_vif *mwl8k_first_vif(struct mwl8k_priv *priv)
5205 {
5206         if (!list_empty(&priv->vif_list))
5207                 return list_entry(priv->vif_list.next, struct mwl8k_vif, list);
5208
5209         return NULL;
5210 }
5211
5212 static void mwl8k_configure_filter(struct ieee80211_hw *hw,
5213                                    unsigned int changed_flags,
5214                                    unsigned int *total_flags,
5215                                    u64 multicast)
5216 {
5217         struct mwl8k_priv *priv = hw->priv;
5218         struct mwl8k_cmd_pkt *cmd = (void *)(unsigned long)multicast;
5219
5220         /*
5221          * AP firmware doesn't allow fine-grained control over
5222          * the receive filter.
5223          */
5224         if (priv->ap_fw) {
5225                 *total_flags &= FIF_ALLMULTI | FIF_BCN_PRBRESP_PROMISC;
5226                 kfree(cmd);
5227                 return;
5228         }
5229
5230         /*
5231          * Enable hardware sniffer mode if FIF_CONTROL or
5232          * FIF_OTHER_BSS is requested.
5233          */
5234         if (*total_flags & (FIF_CONTROL | FIF_OTHER_BSS) &&
5235             mwl8k_configure_filter_sniffer(hw, changed_flags, total_flags)) {
5236                 kfree(cmd);
5237                 return;
5238         }
5239
5240         /* Clear unsupported feature flags */
5241         *total_flags &= FIF_ALLMULTI | FIF_BCN_PRBRESP_PROMISC;
5242
5243         if (mwl8k_fw_lock(hw)) {
5244                 kfree(cmd);
5245                 return;
5246         }
5247
5248         if (priv->sniffer_enabled) {
5249                 mwl8k_cmd_enable_sniffer(hw, 0);
5250                 priv->sniffer_enabled = false;
5251         }
5252
5253         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
5254                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC) {
5255                         /*
5256                          * Disable the BSS filter.
5257                          */
5258                         mwl8k_cmd_set_pre_scan(hw);
5259                 } else {
5260                         struct mwl8k_vif *mwl8k_vif;
5261                         const u8 *bssid;
5262
5263                         /*
5264                          * Enable the BSS filter.
5265                          *
5266                          * If there is an active STA interface, use that
5267                          * interface's BSSID, otherwise use a dummy one
5268                          * (where the OUI part needs to be nonzero for
5269                          * the BSSID to be accepted by POST_SCAN).
5270                          */
5271                         mwl8k_vif = mwl8k_first_vif(priv);
5272                         if (mwl8k_vif != NULL)
5273                                 bssid = mwl8k_vif->vif->bss_conf.bssid;
5274                         else
5275                                 bssid = "\x01\x00\x00\x00\x00\x00";
5276
5277                         mwl8k_cmd_set_post_scan(hw, bssid);
5278                 }
5279         }
5280
5281         /*
5282          * If FIF_ALLMULTI is being requested, throw away the command
5283          * packet that ->prepare_multicast() built and replace it with
5284          * a command packet that enables reception of all multicast
5285          * packets.
5286          */
5287         if (*total_flags & FIF_ALLMULTI) {
5288                 kfree(cmd);
5289                 cmd = __mwl8k_cmd_mac_multicast_adr(hw, 1, NULL);
5290         }
5291
5292         if (cmd != NULL) {
5293                 mwl8k_post_cmd(hw, cmd);
5294                 kfree(cmd);
5295         }
5296
5297         mwl8k_fw_unlock(hw);
5298 }
5299
5300 static int mwl8k_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
5301 {
5302         return mwl8k_cmd_set_rts_threshold(hw, value);
5303 }
5304
5305 static int mwl8k_sta_remove(struct ieee80211_hw *hw,
5306                             struct ieee80211_vif *vif,
5307                             struct ieee80211_sta *sta)
5308 {
5309         struct mwl8k_priv *priv = hw->priv;
5310
5311         if (priv->ap_fw)
5312                 return mwl8k_cmd_set_new_stn_del(hw, vif, sta->addr);
5313         else
5314                 return mwl8k_cmd_update_stadb_del(hw, vif, sta->addr);
5315 }
5316
5317 static int mwl8k_sta_add(struct ieee80211_hw *hw,
5318                          struct ieee80211_vif *vif,
5319                          struct ieee80211_sta *sta)
5320 {
5321         struct mwl8k_priv *priv = hw->priv;
5322         int ret;
5323         int i;
5324         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
5325         struct ieee80211_key_conf *key;
5326
5327         if (!priv->ap_fw) {
5328                 ret = mwl8k_cmd_update_stadb_add(hw, vif, sta);
5329                 if (ret >= 0) {
5330                         MWL8K_STA(sta)->peer_id = ret;
5331                         if (sta->ht_cap.ht_supported)
5332                                 MWL8K_STA(sta)->is_ampdu_allowed = true;
5333                         ret = 0;
5334                 }
5335
5336         } else {
5337                 ret = mwl8k_cmd_set_new_stn_add(hw, vif, sta);
5338         }
5339
5340         for (i = 0; i < NUM_WEP_KEYS; i++) {
5341                 key = IEEE80211_KEY_CONF(mwl8k_vif->wep_key_conf[i].key);
5342                 if (mwl8k_vif->wep_key_conf[i].enabled)
5343                         mwl8k_set_key(hw, SET_KEY, vif, sta, key);
5344         }
5345         return ret;
5346 }
5347
5348 static int mwl8k_conf_tx(struct ieee80211_hw *hw,
5349                          struct ieee80211_vif *vif, u16 queue,
5350                          const struct ieee80211_tx_queue_params *params)
5351 {
5352         struct mwl8k_priv *priv = hw->priv;
5353         int rc;
5354
5355         rc = mwl8k_fw_lock(hw);
5356         if (!rc) {
5357                 BUG_ON(queue > MWL8K_TX_WMM_QUEUES - 1);
5358                 memcpy(&priv->wmm_params[queue], params, sizeof(*params));
5359
5360                 if (!priv->wmm_enabled)
5361                         rc = mwl8k_cmd_set_wmm_mode(hw, 1);
5362
5363                 if (!rc) {
5364                         int q = MWL8K_TX_WMM_QUEUES - 1 - queue;
5365                         rc = mwl8k_cmd_set_edca_params(hw, q,
5366                                                        params->cw_min,
5367                                                        params->cw_max,
5368                                                        params->aifs,
5369                                                        params->txop);
5370                 }
5371
5372                 mwl8k_fw_unlock(hw);
5373         }
5374
5375         return rc;
5376 }
5377
5378 static int mwl8k_get_stats(struct ieee80211_hw *hw,
5379                            struct ieee80211_low_level_stats *stats)
5380 {
5381         return mwl8k_cmd_get_stat(hw, stats);
5382 }
5383
5384 static int mwl8k_get_survey(struct ieee80211_hw *hw, int idx,
5385                                 struct survey_info *survey)
5386 {
5387         struct mwl8k_priv *priv = hw->priv;
5388         struct ieee80211_conf *conf = &hw->conf;
5389         struct ieee80211_supported_band *sband;
5390
5391         if (priv->ap_fw) {
5392                 sband = hw->wiphy->bands[NL80211_BAND_2GHZ];
5393
5394                 if (sband && idx >= sband->n_channels) {
5395                         idx -= sband->n_channels;
5396                         sband = NULL;
5397                 }
5398
5399                 if (!sband)
5400                         sband = hw->wiphy->bands[NL80211_BAND_5GHZ];
5401
5402                 if (!sband || idx >= sband->n_channels)
5403                         return -ENOENT;
5404
5405                 memcpy(survey, &priv->survey[idx], sizeof(*survey));
5406                 survey->channel = &sband->channels[idx];
5407
5408                 return 0;
5409         }
5410
5411         if (idx != 0)
5412                 return -ENOENT;
5413
5414         survey->channel = conf->chandef.chan;
5415         survey->filled = SURVEY_INFO_NOISE_DBM;
5416         survey->noise = priv->noise;
5417
5418         return 0;
5419 }
5420
5421 #define MAX_AMPDU_ATTEMPTS 5
5422
5423 static int
5424 mwl8k_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5425                    struct ieee80211_ampdu_params *params)
5426 {
5427         struct ieee80211_sta *sta = params->sta;
5428         enum ieee80211_ampdu_mlme_action action = params->action;
5429         u16 tid = params->tid;
5430         u16 *ssn = &params->ssn;
5431         u8 buf_size = params->buf_size;
5432         int i, rc = 0;
5433         struct mwl8k_priv *priv = hw->priv;
5434         struct mwl8k_ampdu_stream *stream;
5435         u8 *addr = sta->addr, idx;
5436         struct mwl8k_sta *sta_info = MWL8K_STA(sta);
5437
5438         if (!ieee80211_hw_check(hw, AMPDU_AGGREGATION))
5439                 return -ENOTSUPP;
5440
5441         spin_lock(&priv->stream_lock);
5442         stream = mwl8k_lookup_stream(hw, addr, tid);
5443
5444         switch (action) {
5445         case IEEE80211_AMPDU_RX_START:
5446         case IEEE80211_AMPDU_RX_STOP:
5447                 break;
5448         case IEEE80211_AMPDU_TX_START:
5449                 /* By the time we get here the hw queues may contain outgoing
5450                  * packets for this RA/TID that are not part of this BA
5451                  * session.  The hw will assign sequence numbers to these
5452                  * packets as they go out.  So if we query the hw for its next
5453                  * sequence number and use that for the SSN here, it may end up
5454                  * being wrong, which will lead to sequence number mismatch at
5455                  * the recipient.  To avoid this, we reset the sequence number
5456                  * to O for the first MPDU in this BA stream.
5457                  */
5458                 *ssn = 0;
5459                 if (stream == NULL) {
5460                         /* This means that somebody outside this driver called
5461                          * ieee80211_start_tx_ba_session.  This is unexpected
5462                          * because we do our own rate control.  Just warn and
5463                          * move on.
5464                          */
5465                         wiphy_warn(hw->wiphy, "Unexpected call to %s.  "
5466                                    "Proceeding anyway.\n", __func__);
5467                         stream = mwl8k_add_stream(hw, sta, tid);
5468                 }
5469                 if (stream == NULL) {
5470                         wiphy_debug(hw->wiphy, "no free AMPDU streams\n");
5471                         rc = -EBUSY;
5472                         break;
5473                 }
5474                 stream->state = AMPDU_STREAM_IN_PROGRESS;
5475
5476                 /* Release the lock before we do the time consuming stuff */
5477                 spin_unlock(&priv->stream_lock);
5478                 for (i = 0; i < MAX_AMPDU_ATTEMPTS; i++) {
5479
5480                         /* Check if link is still valid */
5481                         if (!sta_info->is_ampdu_allowed) {
5482                                 spin_lock(&priv->stream_lock);
5483                                 mwl8k_remove_stream(hw, stream);
5484                                 spin_unlock(&priv->stream_lock);
5485                                 return -EBUSY;
5486                         }
5487
5488                         rc = mwl8k_check_ba(hw, stream, vif);
5489
5490                         /* If HW restart is in progress mwl8k_post_cmd will
5491                          * return -EBUSY. Avoid retrying mwl8k_check_ba in
5492                          * such cases
5493                          */
5494                         if (!rc || rc == -EBUSY)
5495                                 break;
5496                         /*
5497                          * HW queues take time to be flushed, give them
5498                          * sufficient time
5499                          */
5500
5501                         msleep(1000);
5502                 }
5503                 spin_lock(&priv->stream_lock);
5504                 if (rc) {
5505                         wiphy_err(hw->wiphy, "Stream for tid %d busy after %d"
5506                                 " attempts\n", tid, MAX_AMPDU_ATTEMPTS);
5507                         mwl8k_remove_stream(hw, stream);
5508                         rc = -EBUSY;
5509                         break;
5510                 }
5511                 ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid);
5512                 break;
5513         case IEEE80211_AMPDU_TX_STOP_CONT:
5514         case IEEE80211_AMPDU_TX_STOP_FLUSH:
5515         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
5516                 if (stream) {
5517                         if (stream->state == AMPDU_STREAM_ACTIVE) {
5518                                 idx = stream->idx;
5519                                 spin_unlock(&priv->stream_lock);
5520                                 mwl8k_destroy_ba(hw, idx);
5521                                 spin_lock(&priv->stream_lock);
5522                         }
5523                         mwl8k_remove_stream(hw, stream);
5524                 }
5525                 ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
5526                 break;
5527         case IEEE80211_AMPDU_TX_OPERATIONAL:
5528                 BUG_ON(stream == NULL);
5529                 BUG_ON(stream->state != AMPDU_STREAM_IN_PROGRESS);
5530                 spin_unlock(&priv->stream_lock);
5531                 rc = mwl8k_create_ba(hw, stream, buf_size, vif);
5532                 spin_lock(&priv->stream_lock);
5533                 if (!rc)
5534                         stream->state = AMPDU_STREAM_ACTIVE;
5535                 else {
5536                         idx = stream->idx;
5537                         spin_unlock(&priv->stream_lock);
5538                         mwl8k_destroy_ba(hw, idx);
5539                         spin_lock(&priv->stream_lock);
5540                         wiphy_debug(hw->wiphy,
5541                                 "Failed adding stream for sta %pM tid %d\n",
5542                                 addr, tid);
5543                         mwl8k_remove_stream(hw, stream);
5544                 }
5545                 break;
5546
5547         default:
5548                 rc = -ENOTSUPP;
5549         }
5550
5551         spin_unlock(&priv->stream_lock);
5552         return rc;
5553 }
5554
5555 static void mwl8k_sw_scan_start(struct ieee80211_hw *hw,
5556                                 struct ieee80211_vif *vif,
5557                                 const u8 *mac_addr)
5558 {
5559         struct mwl8k_priv *priv = hw->priv;
5560         u8 tmp;
5561
5562         if (!priv->ap_fw)
5563                 return;
5564
5565         /* clear all stats */
5566         priv->channel_time = 0;
5567         ioread32(priv->regs + BBU_RXRDY_CNT_REG);
5568         ioread32(priv->regs + NOK_CCA_CNT_REG);
5569         mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &tmp);
5570
5571         priv->sw_scan_start = true;
5572 }
5573
5574 static void mwl8k_sw_scan_complete(struct ieee80211_hw *hw,
5575                                    struct ieee80211_vif *vif)
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) "/*(DEBLOBBED)*/"
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) "/*(DEBLOBBED)*/"
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   = "/*(DEBLOBBED)*/",
5653                 .fw_image_sta   = "/*(DEBLOBBED)*/",
5654         },
5655         [MWL8687] = {
5656                 .part_name      = "88w8687",
5657                 .helper_image   = "/*(DEBLOBBED)*/",
5658                 .fw_image_sta   = "/*(DEBLOBBED)*/",
5659         },
5660         [MWL8366] = {
5661                 .part_name      = "88w8366",
5662                 .helper_image   = "/*(DEBLOBBED)*/",
5663                 .fw_image_sta   = "/*(DEBLOBBED)*/",
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 /*(DEBLOBBED)*/
5677
5678 static const struct pci_device_id mwl8k_pci_id_table[] = {
5679         { PCI_VDEVICE(MARVELL, 0x2a0a), .driver_data = MWL8363, },
5680         { PCI_VDEVICE(MARVELL, 0x2a0c), .driver_data = MWL8363, },
5681         { PCI_VDEVICE(MARVELL, 0x2a24), .driver_data = MWL8363, },
5682         { PCI_VDEVICE(MARVELL, 0x2a2b), .driver_data = MWL8687, },
5683         { PCI_VDEVICE(MARVELL, 0x2a30), .driver_data = MWL8687, },
5684         { PCI_VDEVICE(MARVELL, 0x2a40), .driver_data = MWL8366, },
5685         { PCI_VDEVICE(MARVELL, 0x2a41), .driver_data = MWL8366, },
5686         { PCI_VDEVICE(MARVELL, 0x2a42), .driver_data = MWL8366, },
5687         { PCI_VDEVICE(MARVELL, 0x2a43), .driver_data = MWL8366, },
5688         { PCI_VDEVICE(MARVELL, 0x2b36), .driver_data = MWL8764, },
5689         { },
5690 };
5691 MODULE_DEVICE_TABLE(pci, mwl8k_pci_id_table);
5692
5693 static int mwl8k_request_alt_fw(struct mwl8k_priv *priv)
5694 {
5695         int rc;
5696         printk(KERN_ERR "%s: Error requesting preferred fw %s.\n"
5697                "Trying alternative firmware %s\n", pci_name(priv->pdev),
5698                priv->fw_pref, priv->fw_alt);
5699         rc = mwl8k_request_fw(priv, priv->fw_alt, &priv->fw_ucode, true);
5700         if (rc) {
5701                 printk(KERN_ERR "%s: Error requesting alt fw %s\n",
5702                        pci_name(priv->pdev), priv->fw_alt);
5703                 return rc;
5704         }
5705         return 0;
5706 }
5707
5708 static int mwl8k_firmware_load_success(struct mwl8k_priv *priv);
5709 static void mwl8k_fw_state_machine(const struct firmware *fw, void *context)
5710 {
5711         struct mwl8k_priv *priv = context;
5712         struct mwl8k_device_info *di = priv->device_info;
5713         int rc;
5714
5715         switch (priv->fw_state) {
5716         case FW_STATE_INIT:
5717                 if (!fw) {
5718                         printk(KERN_ERR "%s: Error requesting helper fw %s\n",
5719                                pci_name(priv->pdev), di->helper_image);
5720                         goto fail;
5721                 }
5722                 priv->fw_helper = fw;
5723                 rc = mwl8k_request_fw(priv, priv->fw_pref, &priv->fw_ucode,
5724                                       true);
5725                 if (rc && priv->fw_alt) {
5726                         rc = mwl8k_request_alt_fw(priv);
5727                         if (rc)
5728                                 goto fail;
5729                         priv->fw_state = FW_STATE_LOADING_ALT;
5730                 } else if (rc)
5731                         goto fail;
5732                 else
5733                         priv->fw_state = FW_STATE_LOADING_PREF;
5734                 break;
5735
5736         case FW_STATE_LOADING_PREF:
5737                 if (!fw) {
5738                         if (priv->fw_alt) {
5739                                 rc = mwl8k_request_alt_fw(priv);
5740                                 if (rc)
5741                                         goto fail;
5742                                 priv->fw_state = FW_STATE_LOADING_ALT;
5743                         } else
5744                                 goto fail;
5745                 } else {
5746                         priv->fw_ucode = fw;
5747                         rc = mwl8k_firmware_load_success(priv);
5748                         if (rc)
5749                                 goto fail;
5750                         else
5751                                 complete(&priv->firmware_loading_complete);
5752                 }
5753                 break;
5754
5755         case FW_STATE_LOADING_ALT:
5756                 if (!fw) {
5757                         printk(KERN_ERR "%s: Error requesting alt fw %s\n",
5758                                pci_name(priv->pdev), di->helper_image);
5759                         goto fail;
5760                 }
5761                 priv->fw_ucode = fw;
5762                 rc = mwl8k_firmware_load_success(priv);
5763                 if (rc)
5764                         goto fail;
5765                 else
5766                         complete(&priv->firmware_loading_complete);
5767                 break;
5768
5769         default:
5770                 printk(KERN_ERR "%s: Unexpected firmware loading state: %d\n",
5771                        MWL8K_NAME, priv->fw_state);
5772                 BUG_ON(1);
5773         }
5774
5775         return;
5776
5777 fail:
5778         priv->fw_state = FW_STATE_ERROR;
5779         complete(&priv->firmware_loading_complete);
5780         device_release_driver(&priv->pdev->dev);
5781         mwl8k_release_firmware(priv);
5782 }
5783
5784 #define MAX_RESTART_ATTEMPTS 1
5785 static int mwl8k_init_firmware(struct ieee80211_hw *hw, char *fw_image,
5786                                bool nowait)
5787 {
5788         struct mwl8k_priv *priv = hw->priv;
5789         int rc;
5790         int count = MAX_RESTART_ATTEMPTS;
5791
5792 retry:
5793         /* Reset firmware and hardware */
5794         mwl8k_hw_reset(priv);
5795
5796         /* Ask userland hotplug daemon for the device firmware */
5797         rc = mwl8k_request_firmware(priv, fw_image, nowait);
5798         if (rc) {
5799                 wiphy_err(hw->wiphy, "Firmware files not found\n");
5800                 return rc;
5801         }
5802
5803         if (nowait)
5804                 return rc;
5805
5806         /* Load firmware into hardware */
5807         rc = mwl8k_load_firmware(hw);
5808         if (rc)
5809                 wiphy_err(hw->wiphy, "Cannot start firmware\n");
5810
5811         /* Reclaim memory once firmware is successfully loaded */
5812         mwl8k_release_firmware(priv);
5813
5814         if (rc && count) {
5815                 /* FW did not start successfully;
5816                  * lets try one more time
5817                  */
5818                 count--;
5819                 wiphy_err(hw->wiphy, "Trying to reload the firmware again\n");
5820                 msleep(20);
5821                 goto retry;
5822         }
5823
5824         return rc;
5825 }
5826
5827 static int mwl8k_init_txqs(struct ieee80211_hw *hw)
5828 {
5829         struct mwl8k_priv *priv = hw->priv;
5830         int rc = 0;
5831         int i;
5832
5833         for (i = 0; i < mwl8k_tx_queues(priv); i++) {
5834                 rc = mwl8k_txq_init(hw, i);
5835                 if (rc)
5836                         break;
5837                 if (priv->ap_fw)
5838                         iowrite32(priv->txq[i].txd_dma,
5839                                   priv->sram + priv->txq_offset[i]);
5840         }
5841         return rc;
5842 }
5843
5844 /* initialize hw after successfully loading a firmware image */
5845 static int mwl8k_probe_hw(struct ieee80211_hw *hw)
5846 {
5847         struct mwl8k_priv *priv = hw->priv;
5848         int rc = 0;
5849         int i;
5850
5851         if (priv->ap_fw) {
5852                 priv->rxd_ops = priv->device_info->ap_rxd_ops;
5853                 if (priv->rxd_ops == NULL) {
5854                         wiphy_err(hw->wiphy,
5855                                   "Driver does not have AP firmware image support for this hardware\n");
5856                         rc = -ENOENT;
5857                         goto err_stop_firmware;
5858                 }
5859         } else {
5860                 priv->rxd_ops = &rxd_sta_ops;
5861         }
5862
5863         priv->sniffer_enabled = false;
5864         priv->wmm_enabled = false;
5865         priv->pending_tx_pkts = 0;
5866         atomic_set(&priv->watchdog_event_pending, 0);
5867
5868         rc = mwl8k_rxq_init(hw, 0);
5869         if (rc)
5870                 goto err_stop_firmware;
5871         rxq_refill(hw, 0, INT_MAX);
5872
5873         /* For the sta firmware, we need to know the dma addresses of tx queues
5874          * before sending MWL8K_CMD_GET_HW_SPEC.  So we must initialize them
5875          * prior to issuing this command.  But for the AP case, we learn the
5876          * total number of queues from the result CMD_GET_HW_SPEC, so for this
5877          * case we must initialize the tx queues after.
5878          */
5879         priv->num_ampdu_queues = 0;
5880         if (!priv->ap_fw) {
5881                 rc = mwl8k_init_txqs(hw);
5882                 if (rc)
5883                         goto err_free_queues;
5884         }
5885
5886         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
5887         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5888         iowrite32(MWL8K_A2H_INT_TX_DONE|MWL8K_A2H_INT_RX_READY|
5889                   MWL8K_A2H_INT_BA_WATCHDOG,
5890                   priv->regs + MWL8K_HIU_A2H_INTERRUPT_CLEAR_SEL);
5891         iowrite32(MWL8K_A2H_INT_OPC_DONE,
5892                   priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
5893
5894         rc = request_irq(priv->pdev->irq, mwl8k_interrupt,
5895                          IRQF_SHARED, MWL8K_NAME, hw);
5896         if (rc) {
5897                 wiphy_err(hw->wiphy, "failed to register IRQ handler\n");
5898                 goto err_free_queues;
5899         }
5900
5901         /*
5902          * When hw restart is requested,
5903          * mac80211 will take care of clearing
5904          * the ampdu streams, so do not clear
5905          * the ampdu state here
5906          */
5907         if (!priv->hw_restart_in_progress)
5908                 memset(priv->ampdu, 0, sizeof(priv->ampdu));
5909
5910         /*
5911          * Temporarily enable interrupts.  Initial firmware host
5912          * commands use interrupts and avoid polling.  Disable
5913          * interrupts when done.
5914          */
5915         iowrite32(MWL8K_A2H_EVENTS, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5916
5917         /* Get config data, mac addrs etc */
5918         if (priv->ap_fw) {
5919                 rc = mwl8k_cmd_get_hw_spec_ap(hw);
5920                 if (!rc)
5921                         rc = mwl8k_init_txqs(hw);
5922                 if (!rc)
5923                         rc = mwl8k_cmd_set_hw_spec(hw);
5924         } else {
5925                 rc = mwl8k_cmd_get_hw_spec_sta(hw);
5926         }
5927         if (rc) {
5928                 wiphy_err(hw->wiphy, "Cannot initialise firmware\n");
5929                 goto err_free_irq;
5930         }
5931
5932         /* Turn radio off */
5933         rc = mwl8k_cmd_radio_disable(hw);
5934         if (rc) {
5935                 wiphy_err(hw->wiphy, "Cannot disable\n");
5936                 goto err_free_irq;
5937         }
5938
5939         /* Clear MAC address */
5940         rc = mwl8k_cmd_set_mac_addr(hw, NULL, "\x00\x00\x00\x00\x00\x00");
5941         if (rc) {
5942                 wiphy_err(hw->wiphy, "Cannot clear MAC address\n");
5943                 goto err_free_irq;
5944         }
5945
5946         /* Configure Antennas */
5947         rc = mwl8k_cmd_rf_antenna(hw, MWL8K_RF_ANTENNA_RX, 0x3);
5948         if (rc)
5949                 wiphy_warn(hw->wiphy, "failed to set # of RX antennas");
5950         rc = mwl8k_cmd_rf_antenna(hw, MWL8K_RF_ANTENNA_TX, 0x7);
5951         if (rc)
5952                 wiphy_warn(hw->wiphy, "failed to set # of TX antennas");
5953
5954
5955         /* Disable interrupts */
5956         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5957         free_irq(priv->pdev->irq, hw);
5958
5959         wiphy_info(hw->wiphy, "%s v%d, %pm, %s firmware %u.%u.%u.%u\n",
5960                    priv->device_info->part_name,
5961                    priv->hw_rev, hw->wiphy->perm_addr,
5962                    priv->ap_fw ? "AP" : "STA",
5963                    (priv->fw_rev >> 24) & 0xff, (priv->fw_rev >> 16) & 0xff,
5964                    (priv->fw_rev >> 8) & 0xff, priv->fw_rev & 0xff);
5965
5966         return 0;
5967
5968 err_free_irq:
5969         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5970         free_irq(priv->pdev->irq, hw);
5971
5972 err_free_queues:
5973         for (i = 0; i < mwl8k_tx_queues(priv); i++)
5974                 mwl8k_txq_deinit(hw, i);
5975         mwl8k_rxq_deinit(hw, 0);
5976
5977 err_stop_firmware:
5978         mwl8k_hw_reset(priv);
5979
5980         return rc;
5981 }
5982
5983 /*
5984  * invoke mwl8k_reload_firmware to change the firmware image after the device
5985  * has already been registered
5986  */
5987 static int mwl8k_reload_firmware(struct ieee80211_hw *hw, char *fw_image)
5988 {
5989         int i, rc = 0;
5990         struct mwl8k_priv *priv = hw->priv;
5991         struct mwl8k_vif *vif, *tmp_vif;
5992
5993         mwl8k_stop(hw);
5994         mwl8k_rxq_deinit(hw, 0);
5995
5996         /*
5997          * All the existing interfaces are re-added by the ieee80211_reconfig;
5998          * which means driver should remove existing interfaces before calling
5999          * ieee80211_restart_hw
6000          */
6001         if (priv->hw_restart_in_progress)
6002                 list_for_each_entry_safe(vif, tmp_vif, &priv->vif_list, list)
6003                         mwl8k_remove_vif(priv, vif);
6004
6005         for (i = 0; i < mwl8k_tx_queues(priv); i++)
6006                 mwl8k_txq_deinit(hw, i);
6007
6008         rc = mwl8k_init_firmware(hw, fw_image, false);
6009         if (rc)
6010                 goto fail;
6011
6012         rc = mwl8k_probe_hw(hw);
6013         if (rc)
6014                 goto fail;
6015
6016         if (priv->hw_restart_in_progress)
6017                 return rc;
6018
6019         rc = mwl8k_start(hw);
6020         if (rc)
6021                 goto fail;
6022
6023         rc = mwl8k_config(hw, ~0);
6024         if (rc)
6025                 goto fail;
6026
6027         for (i = 0; i < MWL8K_TX_WMM_QUEUES; i++) {
6028                 rc = mwl8k_conf_tx(hw, NULL, i, &priv->wmm_params[i]);
6029                 if (rc)
6030                         goto fail;
6031         }
6032
6033         return rc;
6034
6035 fail:
6036         printk(KERN_WARNING "mwl8k: Failed to reload firmware image.\n");
6037         return rc;
6038 }
6039
6040 static const struct ieee80211_iface_limit ap_if_limits[] = {
6041         { .max = 8,     .types = BIT(NL80211_IFTYPE_AP) },
6042         { .max = 1,     .types = BIT(NL80211_IFTYPE_STATION) },
6043 };
6044
6045 static const struct ieee80211_iface_combination ap_if_comb = {
6046         .limits = ap_if_limits,
6047         .n_limits = ARRAY_SIZE(ap_if_limits),
6048         .max_interfaces = 8,
6049         .num_different_channels = 1,
6050 };
6051
6052
6053 static int mwl8k_firmware_load_success(struct mwl8k_priv *priv)
6054 {
6055         struct ieee80211_hw *hw = priv->hw;
6056         int i, rc;
6057
6058         rc = mwl8k_load_firmware(hw);
6059         mwl8k_release_firmware(priv);
6060         if (rc) {
6061                 wiphy_err(hw->wiphy, "Cannot start firmware\n");
6062                 return rc;
6063         }
6064
6065         /*
6066          * Extra headroom is the size of the required DMA header
6067          * minus the size of the smallest 802.11 frame (CTS frame).
6068          */
6069         hw->extra_tx_headroom =
6070                 sizeof(struct mwl8k_dma_data) - sizeof(struct ieee80211_cts);
6071
6072         hw->extra_tx_headroom -= priv->ap_fw ? REDUCED_TX_HEADROOM : 0;
6073
6074         hw->queues = MWL8K_TX_WMM_QUEUES;
6075
6076         /* Set rssi values to dBm */
6077         ieee80211_hw_set(hw, SIGNAL_DBM);
6078         ieee80211_hw_set(hw, HAS_RATE_CONTROL);
6079
6080         /*
6081          * Ask mac80211 to not to trigger PS mode
6082          * based on PM bit of incoming frames.
6083          */
6084         if (priv->ap_fw)
6085                 ieee80211_hw_set(hw, AP_LINK_PS);
6086
6087         hw->vif_data_size = sizeof(struct mwl8k_vif);
6088         hw->sta_data_size = sizeof(struct mwl8k_sta);
6089
6090         priv->macids_used = 0;
6091         INIT_LIST_HEAD(&priv->vif_list);
6092
6093         /* Set default radio state and preamble */
6094         priv->radio_on = false;
6095         priv->radio_short_preamble = false;
6096
6097         /* Finalize join worker */
6098         INIT_WORK(&priv->finalize_join_worker, mwl8k_finalize_join_worker);
6099         /* Handle watchdog ba events */
6100         INIT_WORK(&priv->watchdog_ba_handle, mwl8k_watchdog_ba_events);
6101         /* To reload the firmware if it crashes */
6102         INIT_WORK(&priv->fw_reload, mwl8k_hw_restart_work);
6103
6104         /* TX reclaim and RX tasklets.  */
6105         tasklet_init(&priv->poll_tx_task, mwl8k_tx_poll, (unsigned long)hw);
6106         tasklet_disable(&priv->poll_tx_task);
6107         tasklet_init(&priv->poll_rx_task, mwl8k_rx_poll, (unsigned long)hw);
6108         tasklet_disable(&priv->poll_rx_task);
6109
6110         /* Power management cookie */
6111         priv->cookie = pci_alloc_consistent(priv->pdev, 4, &priv->cookie_dma);
6112         if (priv->cookie == NULL)
6113                 return -ENOMEM;
6114
6115         mutex_init(&priv->fw_mutex);
6116         priv->fw_mutex_owner = NULL;
6117         priv->fw_mutex_depth = 0;
6118         priv->hostcmd_wait = NULL;
6119
6120         spin_lock_init(&priv->tx_lock);
6121
6122         spin_lock_init(&priv->stream_lock);
6123
6124         priv->tx_wait = NULL;
6125
6126         rc = mwl8k_probe_hw(hw);
6127         if (rc)
6128                 goto err_free_cookie;
6129
6130         hw->wiphy->interface_modes = 0;
6131
6132         if (priv->ap_macids_supported || priv->device_info->fw_image_ap) {
6133                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP);
6134                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_STATION);
6135                 hw->wiphy->iface_combinations = &ap_if_comb;
6136                 hw->wiphy->n_iface_combinations = 1;
6137         }
6138
6139         if (priv->sta_macids_supported || priv->device_info->fw_image_sta)
6140                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_STATION);
6141
6142         rc = ieee80211_register_hw(hw);
6143         if (rc) {
6144                 wiphy_err(hw->wiphy, "Cannot register device\n");
6145                 goto err_unprobe_hw;
6146         }
6147
6148         return 0;
6149
6150 err_unprobe_hw:
6151         for (i = 0; i < mwl8k_tx_queues(priv); i++)
6152                 mwl8k_txq_deinit(hw, i);
6153         mwl8k_rxq_deinit(hw, 0);
6154
6155 err_free_cookie:
6156         if (priv->cookie != NULL)
6157                 pci_free_consistent(priv->pdev, 4,
6158                                 priv->cookie, priv->cookie_dma);
6159
6160         return rc;
6161 }
6162 static int mwl8k_probe(struct pci_dev *pdev,
6163                                  const struct pci_device_id *id)
6164 {
6165         static int printed_version;
6166         struct ieee80211_hw *hw;
6167         struct mwl8k_priv *priv;
6168         struct mwl8k_device_info *di;
6169         int rc;
6170
6171         if (!printed_version) {
6172                 printk(KERN_INFO "%s version %s\n", MWL8K_DESC, MWL8K_VERSION);
6173                 printed_version = 1;
6174         }
6175
6176
6177         rc = pci_enable_device(pdev);
6178         if (rc) {
6179                 printk(KERN_ERR "%s: Cannot enable new PCI device\n",
6180                        MWL8K_NAME);
6181                 return rc;
6182         }
6183
6184         rc = pci_request_regions(pdev, MWL8K_NAME);
6185         if (rc) {
6186                 printk(KERN_ERR "%s: Cannot obtain PCI resources\n",
6187                        MWL8K_NAME);
6188                 goto err_disable_device;
6189         }
6190
6191         pci_set_master(pdev);
6192
6193
6194         hw = ieee80211_alloc_hw(sizeof(*priv), &mwl8k_ops);
6195         if (hw == NULL) {
6196                 printk(KERN_ERR "%s: ieee80211 alloc failed\n", MWL8K_NAME);
6197                 rc = -ENOMEM;
6198                 goto err_free_reg;
6199         }
6200
6201         SET_IEEE80211_DEV(hw, &pdev->dev);
6202         pci_set_drvdata(pdev, hw);
6203
6204         priv = hw->priv;
6205         priv->hw = hw;
6206         priv->pdev = pdev;
6207         priv->device_info = &mwl8k_info_tbl[id->driver_data];
6208
6209         if (id->driver_data == MWL8764)
6210                 priv->is_8764 = true;
6211
6212         priv->sram = pci_iomap(pdev, 0, 0x10000);
6213         if (priv->sram == NULL) {
6214                 wiphy_err(hw->wiphy, "Cannot map device SRAM\n");
6215                 rc = -EIO;
6216                 goto err_iounmap;
6217         }
6218
6219         /*
6220          * If BAR0 is a 32 bit BAR, the register BAR will be BAR1.
6221          * If BAR0 is a 64 bit BAR, the register BAR will be BAR2.
6222          */
6223         priv->regs = pci_iomap(pdev, 1, 0x10000);
6224         if (priv->regs == NULL) {
6225                 priv->regs = pci_iomap(pdev, 2, 0x10000);
6226                 if (priv->regs == NULL) {
6227                         wiphy_err(hw->wiphy, "Cannot map device registers\n");
6228                         rc = -EIO;
6229                         goto err_iounmap;
6230                 }
6231         }
6232
6233         /*
6234          * Choose the initial fw image depending on user input.  If a second
6235          * image is available, make it the alternative image that will be
6236          * loaded if the first one fails.
6237          */
6238         init_completion(&priv->firmware_loading_complete);
6239         di = priv->device_info;
6240         if (ap_mode_default && di->fw_image_ap) {
6241                 priv->fw_pref = di->fw_image_ap;
6242                 priv->fw_alt = di->fw_image_sta;
6243         } else if (!ap_mode_default && di->fw_image_sta) {
6244                 priv->fw_pref = di->fw_image_sta;
6245                 priv->fw_alt = di->fw_image_ap;
6246         } else if (ap_mode_default && !di->fw_image_ap && di->fw_image_sta) {
6247                 printk(KERN_WARNING "AP fw is unavailable.  Using STA fw.");
6248                 priv->fw_pref = di->fw_image_sta;
6249         } else if (!ap_mode_default && !di->fw_image_sta && di->fw_image_ap) {
6250                 printk(KERN_WARNING "STA fw is unavailable.  Using AP fw.");
6251                 priv->fw_pref = di->fw_image_ap;
6252         }
6253         rc = mwl8k_init_firmware(hw, priv->fw_pref, true);
6254         if (rc)
6255                 goto err_stop_firmware;
6256
6257         priv->hw_restart_in_progress = false;
6258
6259         priv->running_bsses = 0;
6260
6261         return rc;
6262
6263 err_stop_firmware:
6264         mwl8k_hw_reset(priv);
6265
6266 err_iounmap:
6267         if (priv->regs != NULL)
6268                 pci_iounmap(pdev, priv->regs);
6269
6270         if (priv->sram != NULL)
6271                 pci_iounmap(pdev, priv->sram);
6272
6273         ieee80211_free_hw(hw);
6274
6275 err_free_reg:
6276         pci_release_regions(pdev);
6277
6278 err_disable_device:
6279         pci_disable_device(pdev);
6280
6281         return rc;
6282 }
6283
6284 static void mwl8k_remove(struct pci_dev *pdev)
6285 {
6286         struct ieee80211_hw *hw = pci_get_drvdata(pdev);
6287         struct mwl8k_priv *priv;
6288         int i;
6289
6290         if (hw == NULL)
6291                 return;
6292         priv = hw->priv;
6293
6294         wait_for_completion(&priv->firmware_loading_complete);
6295
6296         if (priv->fw_state == FW_STATE_ERROR) {
6297                 mwl8k_hw_reset(priv);
6298                 goto unmap;
6299         }
6300
6301         ieee80211_stop_queues(hw);
6302
6303         ieee80211_unregister_hw(hw);
6304
6305         /* Remove TX reclaim and RX tasklets.  */
6306         tasklet_kill(&priv->poll_tx_task);
6307         tasklet_kill(&priv->poll_rx_task);
6308
6309         /* Stop hardware */
6310         mwl8k_hw_reset(priv);
6311
6312         /* Return all skbs to mac80211 */
6313         for (i = 0; i < mwl8k_tx_queues(priv); i++)
6314                 mwl8k_txq_reclaim(hw, i, INT_MAX, 1);
6315
6316         for (i = 0; i < mwl8k_tx_queues(priv); i++)
6317                 mwl8k_txq_deinit(hw, i);
6318
6319         mwl8k_rxq_deinit(hw, 0);
6320
6321         pci_free_consistent(priv->pdev, 4, priv->cookie, priv->cookie_dma);
6322
6323 unmap:
6324         pci_iounmap(pdev, priv->regs);
6325         pci_iounmap(pdev, priv->sram);
6326         ieee80211_free_hw(hw);
6327         pci_release_regions(pdev);
6328         pci_disable_device(pdev);
6329 }
6330
6331 static struct pci_driver mwl8k_driver = {
6332         .name           = MWL8K_NAME,
6333         .id_table       = mwl8k_pci_id_table,
6334         .probe          = mwl8k_probe,
6335         .remove         = mwl8k_remove,
6336 };
6337
6338 module_pci_driver(mwl8k_driver);
6339
6340 MODULE_DESCRIPTION(MWL8K_DESC);
6341 MODULE_VERSION(MWL8K_VERSION);
6342 MODULE_AUTHOR("Lennert Buytenhek <buytenh@marvell.com>");
6343 MODULE_LICENSE("GPL");