drivers/net/wireless/marvell/mwl8k.c

   1 /*
   2  * drivers/net/wireless/mwl8k.c
   3  * Driver for Marvell TOPDOG 802.11 Wireless cards
   4  *
   5  * Copyright (C) 2008, 2009, 2010 Marvell Semiconductor Inc.
   6  *
   7  * This file is licensed under the terms of the GNU General Public
   8  * License version 2.  This program is licensed "as is" without any
   9  * warranty of any kind, whether express or implied.
  10  */
  11
  12 #include <linux/interrupt.h>
  13 #include <linux/module.h>
  14 #include <linux/kernel.h>
  15 #include <linux/sched.h>
  16 #include <linux/spinlock.h>
  17 #include <linux/list.h>
  18 #include <linux/pci.h>
  19 #include <linux/delay.h>
  20 #include <linux/completion.h>
  21 #include <linux/etherdevice.h>
  22 #include <linux/slab.h>
  23 #include <net/mac80211.h>
  24 #include <linux/moduleparam.h>
  25 #include <linux/firmware.h>
  26 #include <linux/workqueue.h>
  27
  28 #define MWL8K_DESC      "Marvell TOPDOG(R) 802.11 Wireless Network Driver"
  29 #define MWL8K_NAME      KBUILD_MODNAME
  30 #define MWL8K_VERSION   "0.13"
  31
  32 /* Module parameters */
  33 static bool ap_mode_default;
  34 module_param(ap_mode_default, bool, 0);
  35 MODULE_PARM_DESC(ap_mode_default,
  36                  "Set to 1 to make ap mode the default instead of sta mode");
  37
  38 /* Register definitions */
  39 #define MWL8K_HIU_GEN_PTR                       0x00000c10
  40 #define  MWL8K_MODE_STA                          0x0000005a
  41 #define  MWL8K_MODE_AP                           0x000000a5
  42 #define MWL8K_HIU_INT_CODE                      0x00000c14
  43 #define  MWL8K_FWSTA_READY                       0xf0f1f2f4
  44 #define  MWL8K_FWAP_READY                        0xf1f2f4a5
  45 #define  MWL8K_INT_CODE_CMD_FINISHED             0x00000005
  46 #define MWL8K_HIU_SCRATCH                       0x00000c40
  47
  48 /* Host->device communications */
  49 #define MWL8K_HIU_H2A_INTERRUPT_EVENTS          0x00000c18
  50 #define MWL8K_HIU_H2A_INTERRUPT_STATUS          0x00000c1c
  51 #define MWL8K_HIU_H2A_INTERRUPT_MASK            0x00000c20
  52 #define MWL8K_HIU_H2A_INTERRUPT_CLEAR_SEL       0x00000c24
  53 #define MWL8K_HIU_H2A_INTERRUPT_STATUS_MASK     0x00000c28
  54 #define  MWL8K_H2A_INT_DUMMY                     (1 << 20)
  55 #define  MWL8K_H2A_INT_RESET                     (1 << 15)
  56 #define  MWL8K_H2A_INT_DOORBELL                  (1 << 1)
  57 #define  MWL8K_H2A_INT_PPA_READY                 (1 << 0)
  58
  59 /* Device->host communications */
  60 #define MWL8K_HIU_A2H_INTERRUPT_EVENTS          0x00000c2c
  61 #define MWL8K_HIU_A2H_INTERRUPT_STATUS          0x00000c30
  62 #define MWL8K_HIU_A2H_INTERRUPT_MASK            0x00000c34
  63 #define MWL8K_HIU_A2H_INTERRUPT_CLEAR_SEL       0x00000c38
  64 #define MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK     0x00000c3c
  65 #define  MWL8K_A2H_INT_DUMMY                     (1 << 20)
  66 #define  MWL8K_A2H_INT_BA_WATCHDOG               (1 << 14)
  67 #define  MWL8K_A2H_INT_CHNL_SWITCHED             (1 << 11)
  68 #define  MWL8K_A2H_INT_QUEUE_EMPTY               (1 << 10)
  69 #define  MWL8K_A2H_INT_RADAR_DETECT              (1 << 7)
  70 #define  MWL8K_A2H_INT_RADIO_ON                  (1 << 6)
  71 #define  MWL8K_A2H_INT_RADIO_OFF                 (1 << 5)
  72 #define  MWL8K_A2H_INT_MAC_EVENT                 (1 << 3)
  73 #define  MWL8K_A2H_INT_OPC_DONE                  (1 << 2)
  74 #define  MWL8K_A2H_INT_RX_READY                  (1 << 1)
  75 #define  MWL8K_A2H_INT_TX_DONE                   (1 << 0)
  76
  77 /* HW micro second timer register
  78  * located at offset 0xA600. This
  79  * will be used to timestamp tx
  80  * packets.
  81  */
  82
  83 #define MWL8K_HW_TIMER_REGISTER                 0x0000a600
  84 #define BBU_RXRDY_CNT_REG                       0x0000a860
  85 #define NOK_CCA_CNT_REG                         0x0000a6a0
  86 #define BBU_AVG_NOISE_VAL                       0x67
  87
  88 #define MWL8K_A2H_EVENTS        (MWL8K_A2H_INT_DUMMY | \
  89                                  MWL8K_A2H_INT_CHNL_SWITCHED | \
  90                                  MWL8K_A2H_INT_QUEUE_EMPTY | \
  91                                  MWL8K_A2H_INT_RADAR_DETECT | \
  92                                  MWL8K_A2H_INT_RADIO_ON | \
  93                                  MWL8K_A2H_INT_RADIO_OFF | \
  94                                  MWL8K_A2H_INT_MAC_EVENT | \
  95                                  MWL8K_A2H_INT_OPC_DONE | \
  96                                  MWL8K_A2H_INT_RX_READY | \
  97                                  MWL8K_A2H_INT_TX_DONE | \
  98                                  MWL8K_A2H_INT_BA_WATCHDOG)
  99
 100 #define MWL8K_RX_QUEUES         1
 101 #define MWL8K_TX_WMM_QUEUES     4
 102 #define MWL8K_MAX_AMPDU_QUEUES  8
 103 #define MWL8K_MAX_TX_QUEUES     (MWL8K_TX_WMM_QUEUES + MWL8K_MAX_AMPDU_QUEUES)
 104 #define mwl8k_tx_queues(priv)   (MWL8K_TX_WMM_QUEUES + (priv)->num_ampdu_queues)
 105
 106 /* txpriorities are mapped with hw queues.
 107  * Each hw queue has a txpriority.
 108  */
 109 #define TOTAL_HW_TX_QUEUES      8
 110
 111 /* Each HW queue can have one AMPDU stream.
 112  * But, because one of the hw queue is reserved,
 113  * maximum AMPDU queues that can be created are
 114  * one short of total tx queues.
 115  */
 116 #define MWL8K_NUM_AMPDU_STREAMS (TOTAL_HW_TX_QUEUES - 1)
 117
 118 #define MWL8K_NUM_CHANS 18
 119
 120 struct rxd_ops {
 121         int rxd_size;
 122         void (*rxd_init)(void *rxd, dma_addr_t next_dma_addr);
 123         void (*rxd_refill)(void *rxd, dma_addr_t addr, int len);
 124         int (*rxd_process)(void *rxd, struct ieee80211_rx_status *status,
 125                            __le16 *qos, s8 *noise);
 126 };
 127
 128 struct mwl8k_device_info {
 129         char *part_name;
 130         char *helper_image;
 131         char *fw_image_sta;
 132         char *fw_image_ap;
 133         struct rxd_ops *ap_rxd_ops;
 134         u32 fw_api_ap;
 135 };
 136
 137 struct mwl8k_rx_queue {
 138         int rxd_count;
 139
 140         /* hw receives here */
 141         int head;
 142
 143         /* refill descs here */
 144         int tail;
 145
 146         void *rxd;
 147         dma_addr_t rxd_dma;
 148         struct {
 149                 struct sk_buff *skb;
 150                 DEFINE_DMA_UNMAP_ADDR(dma);
 151         } *buf;
 152 };
 153
 154 struct mwl8k_tx_queue {
 155         /* hw transmits here */
 156         int head;
 157
 158         /* sw appends here */
 159         int tail;
 160
 161         unsigned int len;
 162         struct mwl8k_tx_desc *txd;
 163         dma_addr_t txd_dma;
 164         struct sk_buff **skb;
 165 };
 166
 167 enum {
 168         AMPDU_NO_STREAM,
 169         AMPDU_STREAM_NEW,
 170         AMPDU_STREAM_IN_PROGRESS,
 171         AMPDU_STREAM_ACTIVE,
 172 };
 173
 174 struct mwl8k_ampdu_stream {
 175         struct ieee80211_sta *sta;
 176         u8 tid;
 177         u8 state;
 178         u8 idx;
 179 };
 180
 181 struct mwl8k_priv {
 182         struct ieee80211_hw *hw;
 183         struct pci_dev *pdev;
 184         int irq;
 185
 186         struct mwl8k_device_info *device_info;
 187
 188         void __iomem *sram;
 189         void __iomem *regs;
 190
 191         /* firmware */
 192         const struct firmware *fw_helper;
 193         const struct firmware *fw_ucode;
 194
 195         /* hardware/firmware parameters */
 196         bool ap_fw;
 197         struct rxd_ops *rxd_ops;
 198         struct ieee80211_supported_band band_24;
 199         struct ieee80211_channel channels_24[14];
 200         struct ieee80211_rate rates_24[13];
 201         struct ieee80211_supported_band band_50;
 202         struct ieee80211_channel channels_50[9];
 203         struct ieee80211_rate rates_50[8];
 204         u32 ap_macids_supported;
 205         u32 sta_macids_supported;
 206
 207         /* Ampdu stream information */
 208         u8 num_ampdu_queues;
 209         spinlock_t stream_lock;
 210         struct mwl8k_ampdu_stream ampdu[MWL8K_MAX_AMPDU_QUEUES];
 211         struct work_struct watchdog_ba_handle;
 212
 213         /* firmware access */
 214         struct mutex fw_mutex;
 215         struct task_struct *fw_mutex_owner;
 216         struct task_struct *hw_restart_owner;
 217         int fw_mutex_depth;
 218         struct completion *hostcmd_wait;
 219
 220         atomic_t watchdog_event_pending;
 221
 222         /* lock held over TX and TX reap */
 223         spinlock_t tx_lock;
 224
 225         /* TX quiesce completion, protected by fw_mutex and tx_lock */
 226         struct completion *tx_wait;
 227
 228         /* List of interfaces.  */
 229         u32 macids_used;
 230         struct list_head vif_list;
 231
 232         /* power management status cookie from firmware */
 233         u32 *cookie;
 234         dma_addr_t cookie_dma;
 235
 236         u16 num_mcaddrs;
 237         u8 hw_rev;
 238         u32 fw_rev;
 239         u32 caps;
 240
 241         /*
 242          * Running count of TX packets in flight, to avoid
 243          * iterating over the transmit rings each time.
 244          */
 245         int pending_tx_pkts;
 246
 247         struct mwl8k_rx_queue rxq[MWL8K_RX_QUEUES];
 248         struct mwl8k_tx_queue txq[MWL8K_MAX_TX_QUEUES];
 249         u32 txq_offset[MWL8K_MAX_TX_QUEUES];
 250
 251         bool radio_on;
 252         bool radio_short_preamble;
 253         bool sniffer_enabled;
 254         bool wmm_enabled;
 255
 256         /* XXX need to convert this to handle multiple interfaces */
 257         bool capture_beacon;
 258         u8 capture_bssid[ETH_ALEN];
 259         struct sk_buff *beacon_skb;
 260
 261         /*
 262          * This FJ worker has to be global as it is scheduled from the
 263          * RX handler.  At this point we don't know which interface it
 264          * belongs to until the list of bssids waiting to complete join
 265          * is checked.
 266          */
 267         struct work_struct finalize_join_worker;
 268
 269         /* Tasklet to perform TX reclaim.  */
 270         struct tasklet_struct poll_tx_task;
 271
 272         /* Tasklet to perform RX.  */
 273         struct tasklet_struct poll_rx_task;
 274
 275         /* Most recently reported noise in dBm */
 276         s8 noise;
 277
 278         /*
 279          * preserve the queue configurations so they can be restored if/when
 280          * the firmware image is swapped.
 281          */
 282         struct ieee80211_tx_queue_params wmm_params[MWL8K_TX_WMM_QUEUES];
 283
 284         /* To perform the task of reloading the firmware */
 285         struct work_struct fw_reload;
 286         bool hw_restart_in_progress;
 287
 288         /* async firmware loading state */
 289         unsigned fw_state;
 290         char *fw_pref;
 291         char *fw_alt;
 292         bool is_8764;
 293         struct completion firmware_loading_complete;
 294
 295         /* bitmap of running BSSes */
 296         u32 running_bsses;
 297
 298         /* ACS related */
 299         bool sw_scan_start;
 300         struct ieee80211_channel *acs_chan;
 301         unsigned long channel_time;
 302         struct survey_info survey[MWL8K_NUM_CHANS];
 303 };
 304
 305 #define MAX_WEP_KEY_LEN         13
 306 #define NUM_WEP_KEYS            4
 307
 308 /* Per interface specific private data */
 309 struct mwl8k_vif {
 310         struct list_head list;
 311         struct ieee80211_vif *vif;
 312
 313         /* Firmware macid for this vif.  */
 314         int macid;
 315
 316         /* Non AMPDU sequence number assigned by driver.  */
 317         u16 seqno;
 318
 319         /* Saved WEP keys */
 320         struct {
 321                 u8 enabled;
 322                 u8 key[sizeof(struct ieee80211_key_conf) + MAX_WEP_KEY_LEN];
 323         } wep_key_conf[NUM_WEP_KEYS];
 324
 325         /* BSSID */
 326         u8 bssid[ETH_ALEN];
 327
 328         /* A flag to indicate is HW crypto is enabled for this bssid */
 329         bool is_hw_crypto_enabled;
 330 };
 331 #define MWL8K_VIF(_vif) ((struct mwl8k_vif *)&((_vif)->drv_priv))
 332 #define IEEE80211_KEY_CONF(_u8) ((struct ieee80211_key_conf *)(_u8))
 333
 334 struct tx_traffic_info {
 335         u32 start_time;
 336         u32 pkts;
 337 };
 338
 339 #define MWL8K_MAX_TID 8
 340 struct mwl8k_sta {
 341         /* Index into station database. Returned by UPDATE_STADB.  */
 342         u8 peer_id;
 343         u8 is_ampdu_allowed;
 344         struct tx_traffic_info tx_stats[MWL8K_MAX_TID];
 345 };
 346 #define MWL8K_STA(_sta) ((struct mwl8k_sta *)&((_sta)->drv_priv))
 347
 348 static const struct ieee80211_channel mwl8k_channels_24[] = {
 349         { .band = NL80211_BAND_2GHZ, .center_freq = 2412, .hw_value = 1, },
 350         { .band = NL80211_BAND_2GHZ, .center_freq = 2417, .hw_value = 2, },
 351         { .band = NL80211_BAND_2GHZ, .center_freq = 2422, .hw_value = 3, },
 352         { .band = NL80211_BAND_2GHZ, .center_freq = 2427, .hw_value = 4, },
 353         { .band = NL80211_BAND_2GHZ, .center_freq = 2432, .hw_value = 5, },
 354         { .band = NL80211_BAND_2GHZ, .center_freq = 2437, .hw_value = 6, },
 355         { .band = NL80211_BAND_2GHZ, .center_freq = 2442, .hw_value = 7, },
 356         { .band = NL80211_BAND_2GHZ, .center_freq = 2447, .hw_value = 8, },
 357         { .band = NL80211_BAND_2GHZ, .center_freq = 2452, .hw_value = 9, },
 358         { .band = NL80211_BAND_2GHZ, .center_freq = 2457, .hw_value = 10, },
 359         { .band = NL80211_BAND_2GHZ, .center_freq = 2462, .hw_value = 11, },
 360         { .band = NL80211_BAND_2GHZ, .center_freq = 2467, .hw_value = 12, },
 361         { .band = NL80211_BAND_2GHZ, .center_freq = 2472, .hw_value = 13, },
 362         { .band = NL80211_BAND_2GHZ, .center_freq = 2484, .hw_value = 14, },
 363 };
 364
 365 static const struct ieee80211_rate mwl8k_rates_24[] = {
 366         { .bitrate = 10, .hw_value = 2, },
 367         { .bitrate = 20, .hw_value = 4, },
 368         { .bitrate = 55, .hw_value = 11, },
 369         { .bitrate = 110, .hw_value = 22, },
 370         { .bitrate = 220, .hw_value = 44, },
 371         { .bitrate = 60, .hw_value = 12, },
 372         { .bitrate = 90, .hw_value = 18, },
 373         { .bitrate = 120, .hw_value = 24, },
 374         { .bitrate = 180, .hw_value = 36, },
 375         { .bitrate = 240, .hw_value = 48, },
 376         { .bitrate = 360, .hw_value = 72, },
 377         { .bitrate = 480, .hw_value = 96, },
 378         { .bitrate = 540, .hw_value = 108, },
 379 };
 380
 381 static const struct ieee80211_channel mwl8k_channels_50[] = {
 382         { .band = NL80211_BAND_5GHZ, .center_freq = 5180, .hw_value = 36, },
 383         { .band = NL80211_BAND_5GHZ, .center_freq = 5200, .hw_value = 40, },
 384         { .band = NL80211_BAND_5GHZ, .center_freq = 5220, .hw_value = 44, },
 385         { .band = NL80211_BAND_5GHZ, .center_freq = 5240, .hw_value = 48, },
 386         { .band = NL80211_BAND_5GHZ, .center_freq = 5745, .hw_value = 149, },
 387         { .band = NL80211_BAND_5GHZ, .center_freq = 5765, .hw_value = 153, },
 388         { .band = NL80211_BAND_5GHZ, .center_freq = 5785, .hw_value = 157, },
 389         { .band = NL80211_BAND_5GHZ, .center_freq = 5805, .hw_value = 161, },
 390         { .band = NL80211_BAND_5GHZ, .center_freq = 5825, .hw_value = 165, },
 391 };
 392
 393 static const struct ieee80211_rate mwl8k_rates_50[] = {
 394         { .bitrate = 60, .hw_value = 12, },
 395         { .bitrate = 90, .hw_value = 18, },
 396         { .bitrate = 120, .hw_value = 24, },
 397         { .bitrate = 180, .hw_value = 36, },
 398         { .bitrate = 240, .hw_value = 48, },
 399         { .bitrate = 360, .hw_value = 72, },
 400         { .bitrate = 480, .hw_value = 96, },
 401         { .bitrate = 540, .hw_value = 108, },
 402 };
 403
 404 /* Set or get info from Firmware */
 405 #define MWL8K_CMD_GET                   0x0000
 406 #define MWL8K_CMD_SET                   0x0001
 407 #define MWL8K_CMD_SET_LIST              0x0002
 408
 409 /* Firmware command codes */
 410 #define MWL8K_CMD_CODE_DNLD             0x0001
 411 #define MWL8K_CMD_GET_HW_SPEC           0x0003
 412 #define MWL8K_CMD_SET_HW_SPEC           0x0004
 413 #define MWL8K_CMD_MAC_MULTICAST_ADR     0x0010
 414 #define MWL8K_CMD_GET_STAT              0x0014
 415 #define MWL8K_CMD_BBP_REG_ACCESS        0x001a
 416 #define MWL8K_CMD_RADIO_CONTROL         0x001c
 417 #define MWL8K_CMD_RF_TX_POWER           0x001e
 418 #define MWL8K_CMD_TX_POWER              0x001f
 419 #define MWL8K_CMD_RF_ANTENNA            0x0020
 420 #define MWL8K_CMD_SET_BEACON            0x0100          /* per-vif */
 421 #define MWL8K_CMD_SET_PRE_SCAN          0x0107
 422 #define MWL8K_CMD_SET_POST_SCAN         0x0108
 423 #define MWL8K_CMD_SET_RF_CHANNEL        0x010a
 424 #define MWL8K_CMD_SET_AID               0x010d
 425 #define MWL8K_CMD_SET_RATE              0x0110
 426 #define MWL8K_CMD_SET_FINALIZE_JOIN     0x0111
 427 #define MWL8K_CMD_RTS_THRESHOLD         0x0113
 428 #define MWL8K_CMD_SET_SLOT              0x0114
 429 #define MWL8K_CMD_SET_EDCA_PARAMS       0x0115
 430 #define MWL8K_CMD_SET_WMM_MODE          0x0123
 431 #define MWL8K_CMD_MIMO_CONFIG           0x0125
 432 #define MWL8K_CMD_USE_FIXED_RATE        0x0126
 433 #define MWL8K_CMD_ENABLE_SNIFFER        0x0150
 434 #define MWL8K_CMD_SET_MAC_ADDR          0x0202          /* per-vif */
 435 #define MWL8K_CMD_SET_RATEADAPT_MODE    0x0203
 436 #define MWL8K_CMD_GET_WATCHDOG_BITMAP   0x0205
 437 #define MWL8K_CMD_DEL_MAC_ADDR          0x0206          /* per-vif */
 438 #define MWL8K_CMD_BSS_START             0x1100          /* per-vif */
 439 #define MWL8K_CMD_SET_NEW_STN           0x1111          /* per-vif */
 440 #define MWL8K_CMD_UPDATE_ENCRYPTION     0x1122          /* per-vif */
 441 #define MWL8K_CMD_UPDATE_STADB          0x1123
 442 #define MWL8K_CMD_BASTREAM              0x1125
 443
 444 #define MWL8K_LEGACY_5G_RATE_OFFSET \
 445         (ARRAY_SIZE(mwl8k_rates_24) - ARRAY_SIZE(mwl8k_rates_50))
 446
 447 static const char *mwl8k_cmd_name(__le16 cmd, char *buf, int bufsize)
 448 {
 449         u16 command = le16_to_cpu(cmd);
 450
 451 #define MWL8K_CMDNAME(x)        case MWL8K_CMD_##x: do {\
 452                                         snprintf(buf, bufsize, "%s", #x);\
 453                                         return buf;\
 454                                         } while (0)
 455         switch (command & ~0x8000) {
 456                 MWL8K_CMDNAME(CODE_DNLD);
 457                 MWL8K_CMDNAME(GET_HW_SPEC);
 458                 MWL8K_CMDNAME(SET_HW_SPEC);
 459                 MWL8K_CMDNAME(MAC_MULTICAST_ADR);
 460                 MWL8K_CMDNAME(GET_STAT);
 461                 MWL8K_CMDNAME(RADIO_CONTROL);
 462                 MWL8K_CMDNAME(RF_TX_POWER);
 463                 MWL8K_CMDNAME(TX_POWER);
 464                 MWL8K_CMDNAME(RF_ANTENNA);
 465                 MWL8K_CMDNAME(SET_BEACON);
 466                 MWL8K_CMDNAME(SET_PRE_SCAN);
 467                 MWL8K_CMDNAME(SET_POST_SCAN);
 468                 MWL8K_CMDNAME(SET_RF_CHANNEL);
 469                 MWL8K_CMDNAME(SET_AID);
 470                 MWL8K_CMDNAME(SET_RATE);
 471                 MWL8K_CMDNAME(SET_FINALIZE_JOIN);
 472                 MWL8K_CMDNAME(RTS_THRESHOLD);
 473                 MWL8K_CMDNAME(SET_SLOT);
 474                 MWL8K_CMDNAME(SET_EDCA_PARAMS);
 475                 MWL8K_CMDNAME(SET_WMM_MODE);
 476                 MWL8K_CMDNAME(MIMO_CONFIG);
 477                 MWL8K_CMDNAME(USE_FIXED_RATE);
 478                 MWL8K_CMDNAME(ENABLE_SNIFFER);
 479                 MWL8K_CMDNAME(SET_MAC_ADDR);
 480                 MWL8K_CMDNAME(SET_RATEADAPT_MODE);
 481                 MWL8K_CMDNAME(BSS_START);
 482                 MWL8K_CMDNAME(SET_NEW_STN);
 483                 MWL8K_CMDNAME(UPDATE_ENCRYPTION);
 484                 MWL8K_CMDNAME(UPDATE_STADB);
 485                 MWL8K_CMDNAME(BASTREAM);
 486                 MWL8K_CMDNAME(GET_WATCHDOG_BITMAP);
 487         default:
 488                 snprintf(buf, bufsize, "0x%x", cmd);
 489         }
 490 #undef MWL8K_CMDNAME
 491
 492         return buf;
 493 }
 494
 495 /* Hardware and firmware reset */
 496 static void mwl8k_hw_reset(struct mwl8k_priv *priv)
 497 {
 498         iowrite32(MWL8K_H2A_INT_RESET,
 499                 priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
 500         iowrite32(MWL8K_H2A_INT_RESET,
 501                 priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
 502         msleep(20);
 503 }
 504
 505 /* Release fw image */
 506 static void mwl8k_release_fw(const struct firmware **fw)
 507 {
 508         if (*fw == NULL)
 509                 return;
 510         release_firmware(*fw);
 511         *fw = NULL;
 512 }
 513
 514 static void mwl8k_release_firmware(struct mwl8k_priv *priv)
 515 {
 516         mwl8k_release_fw(&priv->fw_ucode);
 517         mwl8k_release_fw(&priv->fw_helper);
 518 }
 519
 520 /* states for asynchronous f/w loading */
 521 static void mwl8k_fw_state_machine(const struct firmware *fw, void *context);
 522 enum {
 523         FW_STATE_INIT = 0,
 524         FW_STATE_LOADING_PREF,
 525         FW_STATE_LOADING_ALT,
 526         FW_STATE_ERROR,
 527 };
 528
 529 /* Request fw image */
 530 static int mwl8k_request_fw(struct mwl8k_priv *priv,
 531                             const char *fname, const struct firmware **fw,
 532                             bool nowait)
 533 {
 534         /* release current image */
 535         if (*fw != NULL)
 536                 mwl8k_release_fw(fw);
 537
 538         if (nowait)
 539                 return request_firmware_nowait(THIS_MODULE, 1, fname,
 540                                                &priv->pdev->dev, GFP_KERNEL,
 541                                                priv, mwl8k_fw_state_machine);
 542         else
 543                 return request_firmware(fw, fname, &priv->pdev->dev);
 544 }
 545
 546 static int mwl8k_request_firmware(struct mwl8k_priv *priv, char *fw_image,
 547                                   bool nowait)
 548 {
 549         struct mwl8k_device_info *di = priv->device_info;
 550         int rc;
 551
 552         if (di->helper_image != NULL) {
 553                 if (nowait)
 554                         rc = mwl8k_request_fw(priv, di->helper_image,
 555                                               &priv->fw_helper, true);
 556                 else
 557                         rc = mwl8k_request_fw(priv, di->helper_image,
 558                                               &priv->fw_helper, false);
 559                 if (rc)
 560                         printk(KERN_ERR "%s: Error requesting helper fw %s\n",
 561                                pci_name(priv->pdev), di->helper_image);
 562
 563                 if (rc || nowait)
 564                         return rc;
 565         }
 566
 567         if (nowait) {
 568                 /*
 569                  * if we get here, no helper image is needed.  Skip the
 570                  * FW_STATE_INIT state.
 571                  */
 572                 priv->fw_state = FW_STATE_LOADING_PREF;
 573                 rc = mwl8k_request_fw(priv, fw_image,
 574                                       &priv->fw_ucode,
 575                                       true);
 576         } else
 577                 rc = mwl8k_request_fw(priv, fw_image,
 578                                       &priv->fw_ucode, false);
 579         if (rc) {
 580                 printk(KERN_ERR "%s: Error requesting firmware file %s\n",
 581                        pci_name(priv->pdev), fw_image);
 582                 mwl8k_release_fw(&priv->fw_helper);
 583                 return rc;
 584         }
 585
 586         return 0;
 587 }
 588
 589 struct mwl8k_cmd_pkt {
 590         __le16  code;
 591         __le16  length;
 592         __u8    seq_num;
 593         __u8    macid;
 594         __le16  result;
 595         char    payload[];
 596 } __packed;
 597
 598 /*
 599  * Firmware loading.
 600  */
 601 static int
 602 mwl8k_send_fw_load_cmd(struct mwl8k_priv *priv, void *data, int length)
 603 {
 604         void __iomem *regs = priv->regs;
 605         dma_addr_t dma_addr;
 606         int loops;
 607
 608         dma_addr = dma_map_single(&priv->pdev->dev, data, length,
 609                                   DMA_TO_DEVICE);
 610         if (dma_mapping_error(&priv->pdev->dev, dma_addr))
 611                 return -ENOMEM;
 612
 613         iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR);
 614         iowrite32(0, regs + MWL8K_HIU_INT_CODE);
 615         iowrite32(MWL8K_H2A_INT_DOORBELL,
 616                 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
 617         iowrite32(MWL8K_H2A_INT_DUMMY,
 618                 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
 619
 620         loops = 1000;
 621         do {
 622                 u32 int_code;
 623                 if (priv->is_8764) {
 624                         int_code = ioread32(regs +
 625                                             MWL8K_HIU_H2A_INTERRUPT_STATUS);
 626                         if (int_code == 0)
 627                                 break;
 628                 } else {
 629                         int_code = ioread32(regs + MWL8K_HIU_INT_CODE);
 630                         if (int_code == MWL8K_INT_CODE_CMD_FINISHED) {
 631                                 iowrite32(0, regs + MWL8K_HIU_INT_CODE);
 632                                 break;
 633                         }
 634                 }
 635                 cond_resched();
 636                 udelay(1);
 637         } while (--loops);
 638
 639         dma_unmap_single(&priv->pdev->dev, dma_addr, length, DMA_TO_DEVICE);
 640
 641         return loops ? 0 : -ETIMEDOUT;
 642 }
 643
 644 static int mwl8k_load_fw_image(struct mwl8k_priv *priv,
 645                                 const u8 *data, size_t length)
 646 {
 647         struct mwl8k_cmd_pkt *cmd;
 648         int done;
 649         int rc = 0;
 650
 651         cmd = kmalloc(sizeof(*cmd) + 256, GFP_KERNEL);
 652         if (cmd == NULL)
 653                 return -ENOMEM;
 654
 655         cmd->code = cpu_to_le16(MWL8K_CMD_CODE_DNLD);
 656         cmd->seq_num = 0;
 657         cmd->macid = 0;
 658         cmd->result = 0;
 659
 660         done = 0;
 661         while (length) {
 662                 int block_size = length > 256 ? 256 : length;
 663
 664                 memcpy(cmd->payload, data + done, block_size);
 665                 cmd->length = cpu_to_le16(block_size);
 666
 667                 rc = mwl8k_send_fw_load_cmd(priv, cmd,
 668                                                 sizeof(*cmd) + block_size);
 669                 if (rc)
 670                         break;
 671
 672                 done += block_size;
 673                 length -= block_size;
 674         }
 675
 676         if (!rc) {
 677                 cmd->length = 0;
 678                 rc = mwl8k_send_fw_load_cmd(priv, cmd, sizeof(*cmd));
 679         }
 680
 681         kfree(cmd);
 682
 683         return rc;
 684 }
 685
 686 static int mwl8k_feed_fw_image(struct mwl8k_priv *priv,
 687                                 const u8 *data, size_t length)
 688 {
 689         unsigned char *buffer;
 690         int may_continue, rc = 0;
 691         u32 done, prev_block_size;
 692
 693         buffer = kmalloc(1024, GFP_KERNEL);
 694         if (buffer == NULL)
 695                 return -ENOMEM;
 696
 697         done = 0;
 698         prev_block_size = 0;
 699         may_continue = 1000;
 700         while (may_continue > 0) {
 701                 u32 block_size;
 702
 703                 block_size = ioread32(priv->regs + MWL8K_HIU_SCRATCH);
 704                 if (block_size & 1) {
 705                         block_size &= ~1;
 706                         may_continue--;
 707                 } else {
 708                         done += prev_block_size;
 709                         length -= prev_block_size;
 710                 }
 711
 712                 if (block_size > 1024 || block_size > length) {
 713                         rc = -EOVERFLOW;
 714                         break;
 715                 }
 716
 717                 if (length == 0) {
 718                         rc = 0;
 719                         break;
 720                 }
 721
 722                 if (block_size == 0) {
 723                         rc = -EPROTO;
 724                         may_continue--;
 725                         udelay(1);
 726                         continue;
 727                 }
 728
 729                 prev_block_size = block_size;
 730                 memcpy(buffer, data + done, block_size);
 731
 732                 rc = mwl8k_send_fw_load_cmd(priv, buffer, block_size);
 733                 if (rc)
 734                         break;
 735         }
 736
 737         if (!rc && length != 0)
 738                 rc = -EREMOTEIO;
 739
 740         kfree(buffer);
 741
 742         return rc;
 743 }
 744
 745 static int mwl8k_load_firmware(struct ieee80211_hw *hw)
 746 {
 747         struct mwl8k_priv *priv = hw->priv;
 748         const struct firmware *fw = priv->fw_ucode;
 749         int rc;
 750         int loops;
 751
 752         if (!memcmp(fw->data, "\x01\x00\x00\x00", 4) && !priv->is_8764) {
 753                 const struct firmware *helper = priv->fw_helper;
 754
 755                 if (helper == NULL) {
 756                         printk(KERN_ERR "%s: helper image needed but none "
 757                                "given\n", pci_name(priv->pdev));
 758                         return -EINVAL;
 759                 }
 760
 761                 rc = mwl8k_load_fw_image(priv, helper->data, helper->size);
 762                 if (rc) {
 763                         printk(KERN_ERR "%s: unable to load firmware "
 764                                "helper image\n", pci_name(priv->pdev));
 765                         return rc;
 766                 }
 767                 msleep(20);
 768
 769                 rc = mwl8k_feed_fw_image(priv, fw->data, fw->size);
 770         } else {
 771                 if (priv->is_8764)
 772                         rc = mwl8k_feed_fw_image(priv, fw->data, fw->size);
 773                 else
 774                         rc = mwl8k_load_fw_image(priv, fw->data, fw->size);
 775         }
 776
 777         if (rc) {
 778                 printk(KERN_ERR "%s: unable to load firmware image\n",
 779                        pci_name(priv->pdev));
 780                 return rc;
 781         }
 782
 783         iowrite32(MWL8K_MODE_STA, priv->regs + MWL8K_HIU_GEN_PTR);
 784
 785         loops = 500000;
 786         do {
 787                 u32 ready_code;
 788
 789                 ready_code = ioread32(priv->regs + MWL8K_HIU_INT_CODE);
 790                 if (ready_code == MWL8K_FWAP_READY) {
 791                         priv->ap_fw = true;
 792                         break;
 793                 } else if (ready_code == MWL8K_FWSTA_READY) {
 794                         priv->ap_fw = false;
 795                         break;
 796                 }
 797
 798                 cond_resched();
 799                 udelay(1);
 800         } while (--loops);
 801
 802         return loops ? 0 : -ETIMEDOUT;
 803 }
 804
 805
 806 /* DMA header used by firmware and hardware.  */
 807 struct mwl8k_dma_data {
 808         __le16 fwlen;
 809         struct ieee80211_hdr wh;
 810         char data[];
 811 } __packed;
 812
 813 /* Routines to add/remove DMA header from skb.  */
 814 static inline void mwl8k_remove_dma_header(struct sk_buff *skb, __le16 qos)
 815 {
 816         struct mwl8k_dma_data *tr;
 817         int hdrlen;
 818
 819         tr = (struct mwl8k_dma_data *)skb->data;
 820         hdrlen = ieee80211_hdrlen(tr->wh.frame_control);
 821
 822         if (hdrlen != sizeof(tr->wh)) {
 823                 if (ieee80211_is_data_qos(tr->wh.frame_control)) {
 824                         memmove(tr->data - hdrlen, &tr->wh, hdrlen - 2);
 825                         *((__le16 *)(tr->data - 2)) = qos;
 826                 } else {
 827                         memmove(tr->data - hdrlen, &tr->wh, hdrlen);
 828                 }
 829         }
 830
 831         if (hdrlen != sizeof(*tr))
 832                 skb_pull(skb, sizeof(*tr) - hdrlen);
 833 }
 834
 835 #define REDUCED_TX_HEADROOM     8
 836
 837 static void
 838 mwl8k_add_dma_header(struct mwl8k_priv *priv, struct sk_buff *skb,
 839                                                 int head_pad, int tail_pad)
 840 {
 841         struct ieee80211_hdr *wh;
 842         int hdrlen;
 843         int reqd_hdrlen;
 844         struct mwl8k_dma_data *tr;
 845
 846         /*
 847          * Add a firmware DMA header; the firmware requires that we
 848          * present a 2-byte payload length followed by a 4-address
 849          * header (without QoS field), followed (optionally) by any
 850          * WEP/ExtIV header (but only filled in for CCMP).
 851          */
 852         wh = (struct ieee80211_hdr *)skb->data;
 853
 854         hdrlen = ieee80211_hdrlen(wh->frame_control);
 855
 856         /*
 857          * Check if skb_resize is required because of
 858          * tx_headroom adjustment.
 859          */
 860         if (priv->ap_fw && (hdrlen < (sizeof(struct ieee80211_cts)
 861                                                 + REDUCED_TX_HEADROOM))) {
 862                 if (pskb_expand_head(skb, REDUCED_TX_HEADROOM, 0, GFP_ATOMIC)) {
 863
 864                         wiphy_err(priv->hw->wiphy,
 865                                         "Failed to reallocate TX buffer\n");
 866                         return;
 867                 }
 868                 skb->truesize += REDUCED_TX_HEADROOM;
 869         }
 870
 871         reqd_hdrlen = sizeof(*tr) + head_pad;
 872
 873         if (hdrlen != reqd_hdrlen)
 874                 skb_push(skb, reqd_hdrlen - hdrlen);
 875
 876         if (ieee80211_is_data_qos(wh->frame_control))
 877                 hdrlen -= IEEE80211_QOS_CTL_LEN;
 878
 879         tr = (struct mwl8k_dma_data *)skb->data;
 880         if (wh != &tr->wh)
 881                 memmove(&tr->wh, wh, hdrlen);
 882         if (hdrlen != sizeof(tr->wh))
 883                 memset(((void *)&tr->wh) + hdrlen, 0, sizeof(tr->wh) - hdrlen);
 884
 885         /*
 886          * Firmware length is the length of the fully formed "802.11
 887          * payload".  That is, everything except for the 802.11 header.
 888          * This includes all crypto material including the MIC.
 889          */
 890         tr->fwlen = cpu_to_le16(skb->len - sizeof(*tr) + tail_pad);
 891 }
 892
 893 static void mwl8k_encapsulate_tx_frame(struct mwl8k_priv *priv,
 894                 struct sk_buff *skb)
 895 {
 896         struct ieee80211_hdr *wh;
 897         struct ieee80211_tx_info *tx_info;
 898         struct ieee80211_key_conf *key_conf;
 899         int data_pad;
 900         int head_pad = 0;
 901
 902         wh = (struct ieee80211_hdr *)skb->data;
 903
 904         tx_info = IEEE80211_SKB_CB(skb);
 905
 906         key_conf = NULL;
 907         if (ieee80211_is_data(wh->frame_control))
 908                 key_conf = tx_info->control.hw_key;
 909
 910         /*
 911          * Make sure the packet header is in the DMA header format (4-address
 912          * without QoS), and add head & tail padding when HW crypto is enabled.
 913          *
 914          * We have the following trailer padding requirements:
 915          * - WEP: 4 trailer bytes (ICV)
 916          * - TKIP: 12 trailer bytes (8 MIC + 4 ICV)
 917          * - CCMP: 8 trailer bytes (MIC)
 918          */
 919         data_pad = 0;
 920         if (key_conf != NULL) {
 921                 head_pad = key_conf->iv_len;
 922                 switch (key_conf->cipher) {
 923                 case WLAN_CIPHER_SUITE_WEP40:
 924                 case WLAN_CIPHER_SUITE_WEP104:
 925                         data_pad = 4;
 926                         break;
 927                 case WLAN_CIPHER_SUITE_TKIP:
 928                         data_pad = 12;
 929                         break;
 930                 case WLAN_CIPHER_SUITE_CCMP:
 931                         data_pad = 8;
 932                         break;
 933                 }
 934         }
 935         mwl8k_add_dma_header(priv, skb, head_pad, data_pad);
 936 }
 937
 938 /*
 939  * Packet reception for 88w8366/88w8764 AP firmware.
 940  */
 941 struct mwl8k_rxd_ap {
 942         __le16 pkt_len;
 943         __u8 sq2;
 944         __u8 rate;
 945         __le32 pkt_phys_addr;
 946         __le32 next_rxd_phys_addr;
 947         __le16 qos_control;
 948         __le16 htsig2;
 949         __le32 hw_rssi_info;
 950         __le32 hw_noise_floor_info;
 951         __u8 noise_floor;
 952         __u8 pad0[3];
 953         __u8 rssi;
 954         __u8 rx_status;
 955         __u8 channel;
 956         __u8 rx_ctrl;
 957 } __packed;
 958
 959 #define MWL8K_AP_RATE_INFO_MCS_FORMAT           0x80
 960 #define MWL8K_AP_RATE_INFO_40MHZ                0x40
 961 #define MWL8K_AP_RATE_INFO_RATEID(x)            ((x) & 0x3f)
 962
 963 #define MWL8K_AP_RX_CTRL_OWNED_BY_HOST          0x80
 964
 965 /* 8366/8764 AP rx_status bits */
 966 #define MWL8K_AP_RXSTAT_DECRYPT_ERR_MASK                0x80
 967 #define MWL8K_AP_RXSTAT_GENERAL_DECRYPT_ERR             0xFF
 968 #define MWL8K_AP_RXSTAT_TKIP_DECRYPT_MIC_ERR            0x02
 969 #define MWL8K_AP_RXSTAT_WEP_DECRYPT_ICV_ERR             0x04
 970 #define MWL8K_AP_RXSTAT_TKIP_DECRYPT_ICV_ERR            0x08
 971
 972 static void mwl8k_rxd_ap_init(void *_rxd, dma_addr_t next_dma_addr)
 973 {
 974         struct mwl8k_rxd_ap *rxd = _rxd;
 975
 976         rxd->next_rxd_phys_addr = cpu_to_le32(next_dma_addr);
 977         rxd->rx_ctrl = MWL8K_AP_RX_CTRL_OWNED_BY_HOST;
 978 }
 979
 980 static void mwl8k_rxd_ap_refill(void *_rxd, dma_addr_t addr, int len)
 981 {
 982         struct mwl8k_rxd_ap *rxd = _rxd;
 983
 984         rxd->pkt_len = cpu_to_le16(len);
 985         rxd->pkt_phys_addr = cpu_to_le32(addr);
 986         wmb();
 987         rxd->rx_ctrl = 0;
 988 }
 989
 990 static int
 991 mwl8k_rxd_ap_process(void *_rxd, struct ieee80211_rx_status *status,
 992                      __le16 *qos, s8 *noise)
 993 {
 994         struct mwl8k_rxd_ap *rxd = _rxd;
 995
 996         if (!(rxd->rx_ctrl & MWL8K_AP_RX_CTRL_OWNED_BY_HOST))
 997                 return -1;
 998         rmb();
 999
1000         memset(status, 0, sizeof(*status));
1001
1002         status->signal = -rxd->rssi;
1003         *noise = -rxd->noise_floor;
1004
1005         if (rxd->rate & MWL8K_AP_RATE_INFO_MCS_FORMAT) {
1006                 status->encoding = RX_ENC_HT;
1007                 if (rxd->rate & MWL8K_AP_RATE_INFO_40MHZ)
1008                         status->bw = RATE_INFO_BW_40;
1009                 status->rate_idx = MWL8K_AP_RATE_INFO_RATEID(rxd->rate);
1010         } else {
1011                 int i;
1012
1013                 for (i = 0; i < ARRAY_SIZE(mwl8k_rates_24); i++) {
1014                         if (mwl8k_rates_24[i].hw_value == rxd->rate) {
1015                                 status->rate_idx = i;
1016                                 break;
1017                         }
1018                 }
1019         }
1020
1021         if (rxd->channel > 14) {
1022                 status->band = NL80211_BAND_5GHZ;
1023                 if (!(status->encoding == RX_ENC_HT) &&
1024                     status->rate_idx >= MWL8K_LEGACY_5G_RATE_OFFSET)
1025                         status->rate_idx -= MWL8K_LEGACY_5G_RATE_OFFSET;
1026         } else {
1027                 status->band = NL80211_BAND_2GHZ;
1028         }
1029         status->freq = ieee80211_channel_to_frequency(rxd->channel,
1030                                                       status->band);
1031
1032         *qos = rxd->qos_control;
1033
1034         if ((rxd->rx_status != MWL8K_AP_RXSTAT_GENERAL_DECRYPT_ERR) &&
1035             (rxd->rx_status & MWL8K_AP_RXSTAT_DECRYPT_ERR_MASK) &&
1036             (rxd->rx_status & MWL8K_AP_RXSTAT_TKIP_DECRYPT_MIC_ERR))
1037                 status->flag |= RX_FLAG_MMIC_ERROR;
1038
1039         return le16_to_cpu(rxd->pkt_len);
1040 }
1041
1042 static struct rxd_ops rxd_ap_ops = {
1043         .rxd_size       = sizeof(struct mwl8k_rxd_ap),
1044         .rxd_init       = mwl8k_rxd_ap_init,
1045         .rxd_refill     = mwl8k_rxd_ap_refill,
1046         .rxd_process    = mwl8k_rxd_ap_process,
1047 };
1048
1049 /*
1050  * Packet reception for STA firmware.
1051  */
1052 struct mwl8k_rxd_sta {
1053         __le16 pkt_len;
1054         __u8 link_quality;
1055         __u8 noise_level;
1056         __le32 pkt_phys_addr;
1057         __le32 next_rxd_phys_addr;
1058         __le16 qos_control;
1059         __le16 rate_info;
1060         __le32 pad0[4];
1061         __u8 rssi;
1062         __u8 channel;
1063         __le16 pad1;
1064         __u8 rx_ctrl;
1065         __u8 rx_status;
1066         __u8 pad2[2];
1067 } __packed;
1068
1069 #define MWL8K_STA_RATE_INFO_SHORTPRE            0x8000
1070 #define MWL8K_STA_RATE_INFO_ANTSELECT(x)        (((x) >> 11) & 0x3)
1071 #define MWL8K_STA_RATE_INFO_RATEID(x)           (((x) >> 3) & 0x3f)
1072 #define MWL8K_STA_RATE_INFO_40MHZ               0x0004
1073 #define MWL8K_STA_RATE_INFO_SHORTGI             0x0002
1074 #define MWL8K_STA_RATE_INFO_MCS_FORMAT          0x0001
1075
1076 #define MWL8K_STA_RX_CTRL_OWNED_BY_HOST         0x02
1077 #define MWL8K_STA_RX_CTRL_DECRYPT_ERROR         0x04
1078 /* ICV=0 or MIC=1 */
1079 #define MWL8K_STA_RX_CTRL_DEC_ERR_TYPE          0x08
1080 /* Key is uploaded only in failure case */
1081 #define MWL8K_STA_RX_CTRL_KEY_INDEX                     0x30
1082
1083 static void mwl8k_rxd_sta_init(void *_rxd, dma_addr_t next_dma_addr)
1084 {
1085         struct mwl8k_rxd_sta *rxd = _rxd;
1086
1087         rxd->next_rxd_phys_addr = cpu_to_le32(next_dma_addr);
1088         rxd->rx_ctrl = MWL8K_STA_RX_CTRL_OWNED_BY_HOST;
1089 }
1090
1091 static void mwl8k_rxd_sta_refill(void *_rxd, dma_addr_t addr, int len)
1092 {
1093         struct mwl8k_rxd_sta *rxd = _rxd;
1094
1095         rxd->pkt_len = cpu_to_le16(len);
1096         rxd->pkt_phys_addr = cpu_to_le32(addr);
1097         wmb();
1098         rxd->rx_ctrl = 0;
1099 }
1100
1101 static int
1102 mwl8k_rxd_sta_process(void *_rxd, struct ieee80211_rx_status *status,
1103                        __le16 *qos, s8 *noise)
1104 {
1105         struct mwl8k_rxd_sta *rxd = _rxd;
1106         u16 rate_info;
1107
1108         if (!(rxd->rx_ctrl & MWL8K_STA_RX_CTRL_OWNED_BY_HOST))
1109                 return -1;
1110         rmb();
1111
1112         rate_info = le16_to_cpu(rxd->rate_info);
1113
1114         memset(status, 0, sizeof(*status));
1115
1116         status->signal = -rxd->rssi;
1117         *noise = -rxd->noise_level;
1118         status->antenna = MWL8K_STA_RATE_INFO_ANTSELECT(rate_info);
1119         status->rate_idx = MWL8K_STA_RATE_INFO_RATEID(rate_info);
1120
1121         if (rate_info & MWL8K_STA_RATE_INFO_SHORTPRE)
1122                 status->enc_flags |= RX_ENC_FLAG_SHORTPRE;
1123         if (rate_info & MWL8K_STA_RATE_INFO_40MHZ)
1124                 status->bw = RATE_INFO_BW_40;
1125         if (rate_info & MWL8K_STA_RATE_INFO_SHORTGI)
1126                 status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
1127         if (rate_info & MWL8K_STA_RATE_INFO_MCS_FORMAT)
1128                 status->encoding = RX_ENC_HT;
1129
1130         if (rxd->channel > 14) {
1131                 status->band = NL80211_BAND_5GHZ;
1132                 if (!(status->encoding == RX_ENC_HT) &&
1133                     status->rate_idx >= MWL8K_LEGACY_5G_RATE_OFFSET)
1134                         status->rate_idx -= MWL8K_LEGACY_5G_RATE_OFFSET;
1135         } else {
1136                 status->band = NL80211_BAND_2GHZ;
1137         }
1138         status->freq = ieee80211_channel_to_frequency(rxd->channel,
1139                                                       status->band);
1140
1141         *qos = rxd->qos_control;
1142         if ((rxd->rx_ctrl & MWL8K_STA_RX_CTRL_DECRYPT_ERROR) &&
1143             (rxd->rx_ctrl & MWL8K_STA_RX_CTRL_DEC_ERR_TYPE))
1144                 status->flag |= RX_FLAG_MMIC_ERROR;
1145
1146         return le16_to_cpu(rxd->pkt_len);
1147 }
1148
1149 static struct rxd_ops rxd_sta_ops = {
1150         .rxd_size       = sizeof(struct mwl8k_rxd_sta),
1151         .rxd_init       = mwl8k_rxd_sta_init,
1152         .rxd_refill     = mwl8k_rxd_sta_refill,
1153         .rxd_process    = mwl8k_rxd_sta_process,
1154 };
1155
1156
1157 #define MWL8K_RX_DESCS          256
1158 #define MWL8K_RX_MAXSZ          3800
1159
1160 static int mwl8k_rxq_init(struct ieee80211_hw *hw, int index)
1161 {
1162         struct mwl8k_priv *priv = hw->priv;
1163         struct mwl8k_rx_queue *rxq = priv->rxq + index;
1164         int size;
1165         int i;
1166
1167         rxq->rxd_count = 0;
1168         rxq->head = 0;
1169         rxq->tail = 0;
1170
1171         size = MWL8K_RX_DESCS * priv->rxd_ops->rxd_size;
1172
1173         rxq->rxd = dma_alloc_coherent(&priv->pdev->dev, size, &rxq->rxd_dma,
1174                                       GFP_KERNEL);
1175         if (rxq->rxd == NULL) {
1176                 wiphy_err(hw->wiphy, "failed to alloc RX descriptors\n");
1177                 return -ENOMEM;
1178         }
1179
1180         rxq->buf = kcalloc(MWL8K_RX_DESCS, sizeof(*rxq->buf), GFP_KERNEL);
1181         if (rxq->buf == NULL) {
1182                 dma_free_coherent(&priv->pdev->dev, size, rxq->rxd,
1183                                   rxq->rxd_dma);
1184                 return -ENOMEM;
1185         }
1186
1187         for (i = 0; i < MWL8K_RX_DESCS; i++) {
1188                 int desc_size;
1189                 void *rxd;
1190                 int nexti;
1191                 dma_addr_t next_dma_addr;
1192
1193                 desc_size = priv->rxd_ops->rxd_size;
1194                 rxd = rxq->rxd + (i * priv->rxd_ops->rxd_size);
1195
1196                 nexti = i + 1;
1197                 if (nexti == MWL8K_RX_DESCS)
1198                         nexti = 0;
1199                 next_dma_addr = rxq->rxd_dma + (nexti * desc_size);
1200
1201                 priv->rxd_ops->rxd_init(rxd, next_dma_addr);
1202         }
1203
1204         return 0;
1205 }
1206
1207 static int rxq_refill(struct ieee80211_hw *hw, int index, int limit)
1208 {
1209         struct mwl8k_priv *priv = hw->priv;
1210         struct mwl8k_rx_queue *rxq = priv->rxq + index;
1211         int refilled;
1212
1213         refilled = 0;
1214         while (rxq->rxd_count < MWL8K_RX_DESCS && limit--) {
1215                 struct sk_buff *skb;
1216                 dma_addr_t addr;
1217                 int rx;
1218                 void *rxd;
1219
1220                 skb = dev_alloc_skb(MWL8K_RX_MAXSZ);
1221                 if (skb == NULL)
1222                         break;
1223
1224                 addr = dma_map_single(&priv->pdev->dev, skb->data,
1225                                       MWL8K_RX_MAXSZ, DMA_FROM_DEVICE);
1226
1227                 rxq->rxd_count++;
1228                 rx = rxq->tail++;
1229                 if (rxq->tail == MWL8K_RX_DESCS)
1230                         rxq->tail = 0;
1231                 rxq->buf[rx].skb = skb;
1232                 dma_unmap_addr_set(&rxq->buf[rx], dma, addr);
1233
1234                 rxd = rxq->rxd + (rx * priv->rxd_ops->rxd_size);
1235                 priv->rxd_ops->rxd_refill(rxd, addr, MWL8K_RX_MAXSZ);
1236
1237                 refilled++;
1238         }
1239
1240         return refilled;
1241 }
1242
1243 /* Must be called only when the card's reception is completely halted */
1244 static void mwl8k_rxq_deinit(struct ieee80211_hw *hw, int index)
1245 {
1246         struct mwl8k_priv *priv = hw->priv;
1247         struct mwl8k_rx_queue *rxq = priv->rxq + index;
1248         int i;
1249
1250         if (rxq->rxd == NULL)
1251                 return;
1252
1253         for (i = 0; i < MWL8K_RX_DESCS; i++) {
1254                 if (rxq->buf[i].skb != NULL) {
1255                         dma_unmap_single(&priv->pdev->dev,
1256                                          dma_unmap_addr(&rxq->buf[i], dma),
1257                                          MWL8K_RX_MAXSZ, DMA_FROM_DEVICE);
1258                         dma_unmap_addr_set(&rxq->buf[i], dma, 0);
1259
1260                         kfree_skb(rxq->buf[i].skb);
1261                         rxq->buf[i].skb = NULL;
1262                 }
1263         }
1264
1265         kfree(rxq->buf);
1266         rxq->buf = NULL;
1267
1268         dma_free_coherent(&priv->pdev->dev,
1269                           MWL8K_RX_DESCS * priv->rxd_ops->rxd_size, rxq->rxd,
1270                           rxq->rxd_dma);
1271         rxq->rxd = NULL;
1272 }
1273
1274
1275 /*
1276  * Scan a list of BSSIDs to process for finalize join.
1277  * Allows for extension to process multiple BSSIDs.
1278  */
1279 static inline int
1280 mwl8k_capture_bssid(struct mwl8k_priv *priv, struct ieee80211_hdr *wh)
1281 {
1282         return priv->capture_beacon &&
1283                 ieee80211_is_beacon(wh->frame_control) &&
1284                 ether_addr_equal_64bits(wh->addr3, priv->capture_bssid);
1285 }
1286
1287 static inline void mwl8k_save_beacon(struct ieee80211_hw *hw,
1288                                      struct sk_buff *skb)
1289 {
1290         struct mwl8k_priv *priv = hw->priv;
1291
1292         priv->capture_beacon = false;
1293         eth_zero_addr(priv->capture_bssid);
1294
1295         /*
1296          * Use GFP_ATOMIC as rxq_process is called from
1297          * the primary interrupt handler, memory allocation call
1298          * must not sleep.
1299          */
1300         priv->beacon_skb = skb_copy(skb, GFP_ATOMIC);
1301         if (priv->beacon_skb != NULL)
1302                 ieee80211_queue_work(hw, &priv->finalize_join_worker);
1303 }
1304
1305 static inline struct mwl8k_vif *mwl8k_find_vif_bss(struct list_head *vif_list,
1306                                                    u8 *bssid)
1307 {
1308         struct mwl8k_vif *mwl8k_vif;
1309
1310         list_for_each_entry(mwl8k_vif,
1311                             vif_list, list) {
1312                 if (memcmp(bssid, mwl8k_vif->bssid,
1313                            ETH_ALEN) == 0)
1314                         return mwl8k_vif;
1315         }
1316
1317         return NULL;
1318 }
1319
1320 static int rxq_process(struct ieee80211_hw *hw, int index, int limit)
1321 {
1322         struct mwl8k_priv *priv = hw->priv;
1323         struct mwl8k_vif *mwl8k_vif = NULL;
1324         struct mwl8k_rx_queue *rxq = priv->rxq + index;
1325         int processed;
1326
1327         processed = 0;
1328         while (rxq->rxd_count && limit--) {
1329                 struct sk_buff *skb;
1330                 void *rxd;
1331                 int pkt_len;
1332                 struct ieee80211_rx_status status;
1333                 struct ieee80211_hdr *wh;
1334                 __le16 qos;
1335
1336                 skb = rxq->buf[rxq->head].skb;
1337                 if (skb == NULL)
1338                         break;
1339
1340                 rxd = rxq->rxd + (rxq->head * priv->rxd_ops->rxd_size);
1341
1342                 pkt_len = priv->rxd_ops->rxd_process(rxd, &status, &qos,
1343                                                         &priv->noise);
1344                 if (pkt_len < 0)
1345                         break;
1346
1347                 rxq->buf[rxq->head].skb = NULL;
1348
1349                 dma_unmap_single(&priv->pdev->dev,
1350                                  dma_unmap_addr(&rxq->buf[rxq->head], dma),
1351                                  MWL8K_RX_MAXSZ, DMA_FROM_DEVICE);
1352                 dma_unmap_addr_set(&rxq->buf[rxq->head], dma, 0);
1353
1354                 rxq->head++;
1355                 if (rxq->head == MWL8K_RX_DESCS)
1356                         rxq->head = 0;
1357
1358                 rxq->rxd_count--;
1359
1360                 wh = &((struct mwl8k_dma_data *)skb->data)->wh;
1361
1362                 /*
1363                  * Check for a pending join operation.  Save a
1364                  * copy of the beacon and schedule a tasklet to
1365                  * send a FINALIZE_JOIN command to the firmware.
1366                  */
1367                 if (mwl8k_capture_bssid(priv, (void *)skb->data))
1368                         mwl8k_save_beacon(hw, skb);
1369
1370                 if (ieee80211_has_protected(wh->frame_control)) {
1371
1372                         /* Check if hw crypto has been enabled for
1373                          * this bss. If yes, set the status flags
1374                          * accordingly
1375                          */
1376                         mwl8k_vif = mwl8k_find_vif_bss(&priv->vif_list,
1377                                                                 wh->addr1);
1378
1379                         if (mwl8k_vif != NULL &&
1380                             mwl8k_vif->is_hw_crypto_enabled) {
1381                                 /*
1382                                  * When MMIC ERROR is encountered
1383                                  * by the firmware, payload is
1384                                  * dropped and only 32 bytes of
1385                                  * mwl8k Firmware header is sent
1386                                  * to the host.
1387                                  *
1388                                  * We need to add four bytes of
1389                                  * key information.  In it
1390                                  * MAC80211 expects keyidx set to
1391                                  * 0 for triggering Counter
1392                                  * Measure of MMIC failure.
1393                                  */
1394                                 if (status.flag & RX_FLAG_MMIC_ERROR) {
1395                                         struct mwl8k_dma_data *tr;
1396                                         tr = (struct mwl8k_dma_data *)skb->data;
1397                                         memset((void *)&(tr->data), 0, 4);
1398                                         pkt_len += 4;
1399                                 }
1400
1401                                 if (!ieee80211_is_auth(wh->frame_control))
1402                                         status.flag |= RX_FLAG_IV_STRIPPED |
1403                                                        RX_FLAG_DECRYPTED |
1404                                                        RX_FLAG_MMIC_STRIPPED;
1405                         }
1406                 }
1407
1408                 skb_put(skb, pkt_len);
1409                 mwl8k_remove_dma_header(skb, qos);
1410                 memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
1411                 ieee80211_rx_irqsafe(hw, skb);
1412
1413                 processed++;
1414         }
1415
1416         return processed;
1417 }
1418
1419
1420 /*
1421  * Packet transmission.
1422  */
1423
1424 #define MWL8K_TXD_STATUS_OK                     0x00000001
1425 #define MWL8K_TXD_STATUS_OK_RETRY               0x00000002
1426 #define MWL8K_TXD_STATUS_OK_MORE_RETRY          0x00000004
1427 #define MWL8K_TXD_STATUS_MULTICAST_TX           0x00000008
1428 #define MWL8K_TXD_STATUS_FW_OWNED               0x80000000
1429
1430 #define MWL8K_QOS_QLEN_UNSPEC                   0xff00
1431 #define MWL8K_QOS_ACK_POLICY_MASK               0x0060
1432 #define MWL8K_QOS_ACK_POLICY_NORMAL             0x0000
1433 #define MWL8K_QOS_ACK_POLICY_BLOCKACK           0x0060
1434 #define MWL8K_QOS_EOSP                          0x0010
1435
1436 struct mwl8k_tx_desc {
1437         __le32 status;
1438         __u8 data_rate;
1439         __u8 tx_priority;
1440         __le16 qos_control;
1441         __le32 pkt_phys_addr;
1442         __le16 pkt_len;
1443         __u8 dest_MAC_addr[ETH_ALEN];
1444         __le32 next_txd_phys_addr;
1445         __le32 timestamp;
1446         __le16 rate_info;
1447         __u8 peer_id;
1448         __u8 tx_frag_cnt;
1449 } __packed;
1450
1451 #define MWL8K_TX_DESCS          128
1452
1453 static int mwl8k_txq_init(struct ieee80211_hw *hw, int index)
1454 {
1455         struct mwl8k_priv *priv = hw->priv;
1456         struct mwl8k_tx_queue *txq = priv->txq + index;
1457         int size;
1458         int i;
1459
1460         txq->len = 0;
1461         txq->head = 0;
1462         txq->tail = 0;
1463
1464         size = MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc);
1465
1466         txq->txd = dma_alloc_coherent(&priv->pdev->dev, size, &txq->txd_dma,
1467                                       GFP_KERNEL);
1468         if (txq->txd == NULL) {
1469                 wiphy_err(hw->wiphy, "failed to alloc TX descriptors\n");
1470                 return -ENOMEM;
1471         }
1472
1473         txq->skb = kcalloc(MWL8K_TX_DESCS, sizeof(*txq->skb), GFP_KERNEL);
1474         if (txq->skb == NULL) {
1475                 dma_free_coherent(&priv->pdev->dev, size, txq->txd,
1476                                   txq->txd_dma);
1477                 return -ENOMEM;
1478         }
1479
1480         for (i = 0; i < MWL8K_TX_DESCS; i++) {
1481                 struct mwl8k_tx_desc *tx_desc;
1482                 int nexti;
1483
1484                 tx_desc = txq->txd + i;
1485                 nexti = (i + 1) % MWL8K_TX_DESCS;
1486
1487                 tx_desc->status = 0;
1488                 tx_desc->next_txd_phys_addr =
1489                         cpu_to_le32(txq->txd_dma + nexti * sizeof(*tx_desc));
1490         }
1491
1492         return 0;
1493 }
1494
1495 static inline void mwl8k_tx_start(struct mwl8k_priv *priv)
1496 {
1497         iowrite32(MWL8K_H2A_INT_PPA_READY,
1498                 priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
1499         iowrite32(MWL8K_H2A_INT_DUMMY,
1500                 priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
1501         ioread32(priv->regs + MWL8K_HIU_INT_CODE);
1502 }
1503
1504 static void mwl8k_dump_tx_rings(struct ieee80211_hw *hw)
1505 {
1506         struct mwl8k_priv *priv = hw->priv;
1507         int i;
1508
1509         for (i = 0; i < mwl8k_tx_queues(priv); i++) {
1510                 struct mwl8k_tx_queue *txq = priv->txq + i;
1511                 int fw_owned = 0;
1512                 int drv_owned = 0;
1513                 int unused = 0;
1514                 int desc;
1515
1516                 for (desc = 0; desc < MWL8K_TX_DESCS; desc++) {
1517                         struct mwl8k_tx_desc *tx_desc = txq->txd + desc;
1518                         u32 status;
1519
1520                         status = le32_to_cpu(tx_desc->status);
1521                         if (status & MWL8K_TXD_STATUS_FW_OWNED)
1522                                 fw_owned++;
1523                         else
1524                                 drv_owned++;
1525
1526                         if (tx_desc->pkt_len == 0)
1527                                 unused++;
1528                 }
1529
1530                 wiphy_err(hw->wiphy,
1531                           "txq[%d] len=%d head=%d tail=%d "
1532                           "fw_owned=%d drv_owned=%d unused=%d\n",
1533                           i,
1534                           txq->len, txq->head, txq->tail,
1535                           fw_owned, drv_owned, unused);
1536         }
1537 }
1538
1539 /*
1540  * Must be called with priv->fw_mutex held and tx queues stopped.
1541  */
1542 #define MWL8K_TX_WAIT_TIMEOUT_MS        5000
1543
1544 static int mwl8k_tx_wait_empty(struct ieee80211_hw *hw)
1545 {
1546         struct mwl8k_priv *priv = hw->priv;
1547         DECLARE_COMPLETION_ONSTACK(tx_wait);
1548         int retry;
1549         int rc;
1550
1551         might_sleep();
1552
1553         /* Since fw restart is in progress, allow only the firmware
1554          * commands from the restart code and block the other
1555          * commands since they are going to fail in any case since
1556          * the firmware has crashed
1557          */
1558         if (priv->hw_restart_in_progress) {
1559                 if (priv->hw_restart_owner == current)
1560                         return 0;
1561                 else
1562                         return -EBUSY;
1563         }
1564
1565         if (atomic_read(&priv->watchdog_event_pending))
1566                 return 0;
1567
1568         /*
1569          * The TX queues are stopped at this point, so this test
1570          * doesn't need to take ->tx_lock.
1571          */
1572         if (!priv->pending_tx_pkts)
1573                 return 0;
1574
1575         retry = 1;
1576         rc = 0;
1577
1578         spin_lock_bh(&priv->tx_lock);
1579         priv->tx_wait = &tx_wait;
1580         while (!rc) {
1581                 int oldcount;
1582                 unsigned long timeout;
1583
1584                 oldcount = priv->pending_tx_pkts;
1585
1586                 spin_unlock_bh(&priv->tx_lock);
1587                 timeout = wait_for_completion_timeout(&tx_wait,
1588                             msecs_to_jiffies(MWL8K_TX_WAIT_TIMEOUT_MS));
1589
1590                 if (atomic_read(&priv->watchdog_event_pending)) {
1591                         spin_lock_bh(&priv->tx_lock);
1592                         priv->tx_wait = NULL;
1593                         spin_unlock_bh(&priv->tx_lock);
1594                         return 0;
1595                 }
1596
1597                 spin_lock_bh(&priv->tx_lock);
1598
1599                 if (timeout || !priv->pending_tx_pkts) {
1600                         WARN_ON(priv->pending_tx_pkts);
1601                         if (retry)
1602                                 wiphy_notice(hw->wiphy, "tx rings drained\n");
1603                         break;
1604                 }
1605
1606                 if (retry) {
1607                         mwl8k_tx_start(priv);
1608                         retry = 0;
1609                         continue;
1610                 }
1611
1612                 if (priv->pending_tx_pkts < oldcount) {
1613                         wiphy_notice(hw->wiphy,
1614                                      "waiting for tx rings to drain (%d -> %d pkts)\n",
1615                                      oldcount, priv->pending_tx_pkts);
1616                         retry = 1;
1617                         continue;
1618                 }
1619
1620                 priv->tx_wait = NULL;
1621
1622                 wiphy_err(hw->wiphy, "tx rings stuck for %d ms\n",
1623                           MWL8K_TX_WAIT_TIMEOUT_MS);
1624                 mwl8k_dump_tx_rings(hw);
1625                 priv->hw_restart_in_progress = true;
1626                 ieee80211_queue_work(hw, &priv->fw_reload);
1627
1628                 rc = -ETIMEDOUT;
1629         }
1630         priv->tx_wait = NULL;
1631         spin_unlock_bh(&priv->tx_lock);
1632
1633         return rc;
1634 }
1635
1636 #define MWL8K_TXD_SUCCESS(status)                               \
1637         ((status) & (MWL8K_TXD_STATUS_OK |                      \
1638                      MWL8K_TXD_STATUS_OK_RETRY |                \
1639                      MWL8K_TXD_STATUS_OK_MORE_RETRY))
1640
1641 static int mwl8k_tid_queue_mapping(u8 tid)
1642 {
1643         BUG_ON(tid > 7);
1644
1645         switch (tid) {
1646         case 0:
1647         case 3:
1648                 return IEEE80211_AC_BE;
1649         case 1:
1650         case 2:
1651                 return IEEE80211_AC_BK;
1652         case 4:
1653         case 5:
1654                 return IEEE80211_AC_VI;
1655         case 6:
1656         case 7:
1657                 return IEEE80211_AC_VO;
1658         default:
1659                 return -1;
1660         }
1661 }
1662
1663 /* The firmware will fill in the rate information
1664  * for each packet that gets queued in the hardware
1665  * and these macros will interpret that info.
1666  */
1667
1668 #define RI_FORMAT(a)              (a & 0x0001)
1669 #define RI_RATE_ID_MCS(a)        ((a & 0x01f8) >> 3)
1670
1671 static int
1672 mwl8k_txq_reclaim(struct ieee80211_hw *hw, int index, int limit, int force)
1673 {
1674         struct mwl8k_priv *priv = hw->priv;
1675         struct mwl8k_tx_queue *txq = priv->txq + index;
1676         int processed;
1677
1678         processed = 0;
1679         while (txq->len > 0 && limit--) {
1680                 int tx;
1681                 struct mwl8k_tx_desc *tx_desc;
1682                 unsigned long addr;
1683                 int size;
1684                 struct sk_buff *skb;
1685                 struct ieee80211_tx_info *info;
1686                 u32 status;
1687                 struct ieee80211_sta *sta;
1688                 struct mwl8k_sta *sta_info = NULL;
1689                 u16 rate_info;
1690                 struct ieee80211_hdr *wh;
1691
1692                 tx = txq->head;
1693                 tx_desc = txq->txd + tx;
1694
1695                 status = le32_to_cpu(tx_desc->status);
1696
1697                 if (status & MWL8K_TXD_STATUS_FW_OWNED) {
1698                         if (!force)
1699                                 break;
1700                         tx_desc->status &=
1701                                 ~cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED);
1702                 }
1703
1704                 txq->head = (tx + 1) % MWL8K_TX_DESCS;
1705                 BUG_ON(txq->len == 0);
1706                 txq->len--;
1707                 priv->pending_tx_pkts--;
1708
1709                 addr = le32_to_cpu(tx_desc->pkt_phys_addr);
1710                 size = le16_to_cpu(tx_desc->pkt_len);
1711                 skb = txq->skb[tx];
1712                 txq->skb[tx] = NULL;
1713
1714                 BUG_ON(skb == NULL);
1715                 dma_unmap_single(&priv->pdev->dev, addr, size, DMA_TO_DEVICE);
1716
1717                 mwl8k_remove_dma_header(skb, tx_desc->qos_control);
1718
1719                 wh = (struct ieee80211_hdr *) skb->data;
1720
1721                 /* Mark descriptor as unused */
1722                 tx_desc->pkt_phys_addr = 0;
1723                 tx_desc->pkt_len = 0;
1724
1725                 info = IEEE80211_SKB_CB(skb);
1726                 if (ieee80211_is_data(wh->frame_control)) {
1727                         rcu_read_lock();
1728                         sta = ieee80211_find_sta_by_ifaddr(hw, wh->addr1,
1729                                                            wh->addr2);
1730                         if (sta) {
1731                                 sta_info = MWL8K_STA(sta);
1732                                 BUG_ON(sta_info == NULL);
1733                                 rate_info = le16_to_cpu(tx_desc->rate_info);
1734                                 /* If rate is < 6.5 Mpbs for an ht station
1735                                  * do not form an ampdu. If the station is a
1736                                  * legacy station (format = 0), do not form an
1737                                  * ampdu
1738                                  */
1739                                 if (RI_RATE_ID_MCS(rate_info) < 1 ||
1740                                     RI_FORMAT(rate_info) == 0) {
1741                                         sta_info->is_ampdu_allowed = false;
1742                                 } else {
1743                                         sta_info->is_ampdu_allowed = true;
1744                                 }
1745                         }
1746                         rcu_read_unlock();
1747                 }
1748
1749                 ieee80211_tx_info_clear_status(info);
1750
1751                 /* Rate control is happening in the firmware.
1752                  * Ensure no tx rate is being reported.
1753                  */
1754                 info->status.rates[0].idx = -1;
1755                 info->status.rates[0].count = 1;
1756
1757                 if (MWL8K_TXD_SUCCESS(status))
1758                         info->flags |= IEEE80211_TX_STAT_ACK;
1759
1760                 ieee80211_tx_status_irqsafe(hw, skb);
1761
1762                 processed++;
1763         }
1764
1765         return processed;
1766 }
1767
1768 /* must be called only when the card's transmit is completely halted */
1769 static void mwl8k_txq_deinit(struct ieee80211_hw *hw, int index)
1770 {
1771         struct mwl8k_priv *priv = hw->priv;
1772         struct mwl8k_tx_queue *txq = priv->txq + index;
1773
1774         if (txq->txd == NULL)
1775                 return;
1776
1777         mwl8k_txq_reclaim(hw, index, INT_MAX, 1);
1778
1779         kfree(txq->skb);
1780         txq->skb = NULL;
1781
1782         dma_free_coherent(&priv->pdev->dev,
1783                           MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc),
1784                           txq->txd, txq->txd_dma);
1785         txq->txd = NULL;
1786 }
1787
1788 /* caller must hold priv->stream_lock when calling the stream functions */
1789 static struct mwl8k_ampdu_stream *
1790 mwl8k_add_stream(struct ieee80211_hw *hw, struct ieee80211_sta *sta, u8 tid)
1791 {
1792         struct mwl8k_ampdu_stream *stream;
1793         struct mwl8k_priv *priv = hw->priv;
1794         int i;
1795
1796         for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
1797                 stream = &priv->ampdu[i];
1798                 if (stream->state == AMPDU_NO_STREAM) {
1799                         stream->sta = sta;
1800                         stream->state = AMPDU_STREAM_NEW;
1801                         stream->tid = tid;
1802                         stream->idx = i;
1803                         wiphy_debug(hw->wiphy, "Added a new stream for %pM %d",
1804                                     sta->addr, tid);
1805                         return stream;
1806                 }
1807         }
1808         return NULL;
1809 }
1810
1811 static int
1812 mwl8k_start_stream(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream)
1813 {
1814         int ret;
1815
1816         /* if the stream has already been started, don't start it again */
1817         if (stream->state != AMPDU_STREAM_NEW)
1818                 return 0;
1819         ret = ieee80211_start_tx_ba_session(stream->sta, stream->tid, 0);
1820         if (ret)
1821                 wiphy_debug(hw->wiphy, "Failed to start stream for %pM %d: "
1822                             "%d\n", stream->sta->addr, stream->tid, ret);
1823         else
1824                 wiphy_debug(hw->wiphy, "Started stream for %pM %d\n",
1825                             stream->sta->addr, stream->tid);
1826         return ret;
1827 }
1828
1829 static void
1830 mwl8k_remove_stream(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream)
1831 {
1832         wiphy_debug(hw->wiphy, "Remove stream for %pM %d\n", stream->sta->addr,
1833                     stream->tid);
1834         memset(stream, 0, sizeof(*stream));
1835 }
1836
1837 static struct mwl8k_ampdu_stream *
1838 mwl8k_lookup_stream(struct ieee80211_hw *hw, u8 *addr, u8 tid)
1839 {
1840         struct mwl8k_priv *priv = hw->priv;
1841         int i;
1842
1843         for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
1844                 struct mwl8k_ampdu_stream *stream;
1845                 stream = &priv->ampdu[i];
1846                 if (stream->state == AMPDU_NO_STREAM)
1847                         continue;
1848                 if (!memcmp(stream->sta->addr, addr, ETH_ALEN) &&
1849                     stream->tid == tid)
1850                         return stream;
1851         }
1852         return NULL;
1853 }
1854
1855 #define MWL8K_AMPDU_PACKET_THRESHOLD 64
1856 static inline bool mwl8k_ampdu_allowed(struct ieee80211_sta *sta, u8 tid)
1857 {
1858         struct mwl8k_sta *sta_info = MWL8K_STA(sta);
1859         struct tx_traffic_info *tx_stats;
1860
1861         BUG_ON(tid >= MWL8K_MAX_TID);
1862         tx_stats = &sta_info->tx_stats[tid];
1863
1864         return sta_info->is_ampdu_allowed &&
1865                 tx_stats->pkts > MWL8K_AMPDU_PACKET_THRESHOLD;
1866 }
1867
1868 static inline void mwl8k_tx_count_packet(struct ieee80211_sta *sta, u8 tid)
1869 {
1870         struct mwl8k_sta *sta_info = MWL8K_STA(sta);
1871         struct tx_traffic_info *tx_stats;
1872
1873         BUG_ON(tid >= MWL8K_MAX_TID);
1874         tx_stats = &sta_info->tx_stats[tid];
1875
1876         if (tx_stats->start_time == 0)
1877                 tx_stats->start_time = jiffies;
1878
1879         /* reset the packet count after each second elapses.  If the number of
1880          * packets ever exceeds the ampdu_min_traffic threshold, we will allow
1881          * an ampdu stream to be started.
1882          */
1883         if (jiffies - tx_stats->start_time > HZ) {
1884                 tx_stats->pkts = 0;
1885                 tx_stats->start_time = 0;
1886         } else
1887                 tx_stats->pkts++;
1888 }
1889
1890 /* The hardware ampdu queues start from 5.
1891  * txpriorities for ampdu queues are
1892  * 5 6 7 0 1 2 3 4 ie., queue 5 is highest
1893  * and queue 3 is lowest (queue 4 is reserved)
1894  */
1895 #define BA_QUEUE                5
1896
1897 static void
1898 mwl8k_txq_xmit(struct ieee80211_hw *hw,
1899                int index,
1900                struct ieee80211_sta *sta,
1901                struct sk_buff *skb)
1902 {
1903         struct mwl8k_priv *priv = hw->priv;
1904         struct ieee80211_tx_info *tx_info;
1905         struct mwl8k_vif *mwl8k_vif;
1906         struct ieee80211_hdr *wh;
1907         struct mwl8k_tx_queue *txq;
1908         struct mwl8k_tx_desc *tx;
1909         dma_addr_t dma;
1910         u32 txstatus;
1911         u8 txdatarate;
1912         u16 qos;
1913         int txpriority;
1914         u8 tid = 0;
1915         struct mwl8k_ampdu_stream *stream = NULL;
1916         bool start_ba_session = false;
1917         bool mgmtframe = false;
1918         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
1919         bool eapol_frame = false;
1920
1921         wh = (struct ieee80211_hdr *)skb->data;
1922         if (ieee80211_is_data_qos(wh->frame_control))
1923                 qos = le16_to_cpu(*((__le16 *)ieee80211_get_qos_ctl(wh)));
1924         else
1925                 qos = 0;
1926
1927         if (skb->protocol == cpu_to_be16(ETH_P_PAE))
1928                 eapol_frame = true;
1929
1930         if (ieee80211_is_mgmt(wh->frame_control))
1931                 mgmtframe = true;
1932
1933         if (priv->ap_fw)
1934                 mwl8k_encapsulate_tx_frame(priv, skb);
1935         else
1936                 mwl8k_add_dma_header(priv, skb, 0, 0);
1937
1938         wh = &((struct mwl8k_dma_data *)skb->data)->wh;
1939
1940         tx_info = IEEE80211_SKB_CB(skb);
1941         mwl8k_vif = MWL8K_VIF(tx_info->control.vif);
1942
1943         if (tx_info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
1944                 wh->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1945                 wh->seq_ctrl |= cpu_to_le16(mwl8k_vif->seqno);
1946                 mwl8k_vif->seqno += 0x10;
1947         }
1948
1949         /* Setup firmware control bit fields for each frame type.  */
1950         txstatus = 0;
1951         txdatarate = 0;
1952         if (ieee80211_is_mgmt(wh->frame_control) ||
1953             ieee80211_is_ctl(wh->frame_control)) {
1954                 txdatarate = 0;
1955                 qos |= MWL8K_QOS_QLEN_UNSPEC | MWL8K_QOS_EOSP;
1956         } else if (ieee80211_is_data(wh->frame_control)) {
1957                 txdatarate = 1;
1958                 if (is_multicast_ether_addr(wh->addr1))
1959                         txstatus |= MWL8K_TXD_STATUS_MULTICAST_TX;
1960
1961                 qos &= ~MWL8K_QOS_ACK_POLICY_MASK;
1962                 if (tx_info->flags & IEEE80211_TX_CTL_AMPDU)
1963                         qos |= MWL8K_QOS_ACK_POLICY_BLOCKACK;
1964                 else
1965                         qos |= MWL8K_QOS_ACK_POLICY_NORMAL;
1966         }
1967
1968         /* Queue ADDBA request in the respective data queue.  While setting up
1969          * the ampdu stream, mac80211 queues further packets for that
1970          * particular ra/tid pair.  However, packets piled up in the hardware
1971          * for that ra/tid pair will still go out. ADDBA request and the
1972          * related data packets going out from different queues asynchronously
1973          * will cause a shift in the receiver window which might result in
1974          * ampdu packets getting dropped at the receiver after the stream has
1975          * been setup.
1976          */
1977         if (unlikely(ieee80211_is_action(wh->frame_control) &&
1978             mgmt->u.action.category == WLAN_CATEGORY_BACK &&
1979             mgmt->u.action.u.addba_req.action_code == WLAN_ACTION_ADDBA_REQ &&
1980             priv->ap_fw)) {
1981                 u16 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1982                 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1983                 index = mwl8k_tid_queue_mapping(tid);
1984         }
1985
1986         txpriority = index;
1987
1988         if (priv->ap_fw && sta && sta->ht_cap.ht_supported && !eapol_frame &&
1989             ieee80211_is_data_qos(wh->frame_control)) {
1990                 tid = qos & 0xf;
1991                 mwl8k_tx_count_packet(sta, tid);
1992                 spin_lock(&priv->stream_lock);
1993                 stream = mwl8k_lookup_stream(hw, sta->addr, tid);
1994                 if (stream != NULL) {
1995                         if (stream->state == AMPDU_STREAM_ACTIVE) {
1996                                 WARN_ON(!(qos & MWL8K_QOS_ACK_POLICY_BLOCKACK));
1997                                 txpriority = (BA_QUEUE + stream->idx) %
1998                                              TOTAL_HW_TX_QUEUES;
1999                                 if (stream->idx <= 1)
2000                                         index = stream->idx +
2001                                                 MWL8K_TX_WMM_QUEUES;
2002
2003                         } else if (stream->state == AMPDU_STREAM_NEW) {
2004                                 /* We get here if the driver sends us packets
2005                                  * after we've initiated a stream, but before
2006                                  * our ampdu_action routine has been called
2007                                  * with IEEE80211_AMPDU_TX_START to get the SSN
2008                                  * for the ADDBA request.  So this packet can
2009                                  * go out with no risk of sequence number
2010                                  * mismatch.  No special handling is required.
2011                                  */
2012                         } else {
2013                                 /* Drop packets that would go out after the
2014                                  * ADDBA request was sent but before the ADDBA
2015                                  * response is received.  If we don't do this,
2016                                  * the recipient would probably receive it
2017                                  * after the ADDBA request with SSN 0.  This
2018                                  * will cause the recipient's BA receive window
2019                                  * to shift, which would cause the subsequent
2020                                  * packets in the BA stream to be discarded.
2021                                  * mac80211 queues our packets for us in this
2022                                  * case, so this is really just a safety check.
2023                                  */
2024                                 wiphy_warn(hw->wiphy,
2025                                            "Cannot send packet while ADDBA "
2026                                            "dialog is underway.\n");
2027                                 spin_unlock(&priv->stream_lock);
2028                                 dev_kfree_skb(skb);
2029                                 return;
2030                         }
2031                 } else {
2032                         /* Defer calling mwl8k_start_stream so that the current
2033                          * skb can go out before the ADDBA request.  This
2034                          * prevents sequence number mismatch at the recepient
2035                          * as described above.
2036                          */
2037                         if (mwl8k_ampdu_allowed(sta, tid)) {
2038                                 stream = mwl8k_add_stream(hw, sta, tid);
2039                                 if (stream != NULL)
2040                                         start_ba_session = true;
2041                         }
2042                 }
2043                 spin_unlock(&priv->stream_lock);
2044         } else {
2045                 qos &= ~MWL8K_QOS_ACK_POLICY_MASK;
2046                 qos |= MWL8K_QOS_ACK_POLICY_NORMAL;
2047         }
2048
2049         dma = dma_map_single(&priv->pdev->dev, skb->data, skb->len,
2050                              DMA_TO_DEVICE);
2051
2052         if (dma_mapping_error(&priv->pdev->dev, dma)) {
2053                 wiphy_debug(hw->wiphy,
2054                             "failed to dma map skb, dropping TX frame.\n");
2055                 if (start_ba_session) {
2056                         spin_lock(&priv->stream_lock);
2057                         mwl8k_remove_stream(hw, stream);
2058                         spin_unlock(&priv->stream_lock);
2059                 }
2060                 dev_kfree_skb(skb);
2061                 return;
2062         }
2063
2064         spin_lock_bh(&priv->tx_lock);
2065
2066         txq = priv->txq + index;
2067
2068         /* Mgmt frames that go out frequently are probe
2069          * responses. Other mgmt frames got out relatively
2070          * infrequently. Hence reserve 2 buffers so that
2071          * other mgmt frames do not get dropped due to an
2072          * already queued probe response in one of the
2073          * reserved buffers.
2074          */
2075
2076         if (txq->len >= MWL8K_TX_DESCS - 2) {
2077                 if (!mgmtframe || txq->len == MWL8K_TX_DESCS) {
2078                         if (start_ba_session) {
2079                                 spin_lock(&priv->stream_lock);
2080                                 mwl8k_remove_stream(hw, stream);
2081                                 spin_unlock(&priv->stream_lock);
2082                         }
2083                         mwl8k_tx_start(priv);
2084                         spin_unlock_bh(&priv->tx_lock);
2085                         dma_unmap_single(&priv->pdev->dev, dma, skb->len,
2086                                          DMA_TO_DEVICE);
2087                         dev_kfree_skb(skb);
2088                         return;
2089                 }
2090         }
2091
2092         BUG_ON(txq->skb[txq->tail] != NULL);
2093         txq->skb[txq->tail] = skb;
2094
2095         tx = txq->txd + txq->tail;
2096         tx->data_rate = txdatarate;
2097         tx->tx_priority = txpriority;
2098         tx->qos_control = cpu_to_le16(qos);
2099         tx->pkt_phys_addr = cpu_to_le32(dma);
2100         tx->pkt_len = cpu_to_le16(skb->len);
2101         tx->rate_info = 0;
2102         if (!priv->ap_fw && sta != NULL)
2103                 tx->peer_id = MWL8K_STA(sta)->peer_id;
2104         else
2105                 tx->peer_id = 0;
2106
2107         if (priv->ap_fw && ieee80211_is_data(wh->frame_control) && !eapol_frame)
2108                 tx->timestamp = cpu_to_le32(ioread32(priv->regs +
2109                                                 MWL8K_HW_TIMER_REGISTER));
2110         else
2111                 tx->timestamp = 0;
2112
2113         wmb();
2114         tx->status = cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED | txstatus);
2115
2116         txq->len++;
2117         priv->pending_tx_pkts++;
2118
2119         txq->tail++;
2120         if (txq->tail == MWL8K_TX_DESCS)
2121                 txq->tail = 0;
2122
2123         mwl8k_tx_start(priv);
2124
2125         spin_unlock_bh(&priv->tx_lock);
2126
2127         /* Initiate the ampdu session here */
2128         if (start_ba_session) {
2129                 spin_lock(&priv->stream_lock);
2130                 if (mwl8k_start_stream(hw, stream))
2131                         mwl8k_remove_stream(hw, stream);
2132                 spin_unlock(&priv->stream_lock);
2133         }
2134 }
2135
2136
2137 /*
2138  * Firmware access.
2139  *
2140  * We have the following requirements for issuing firmware commands:
2141  * - Some commands require that the packet transmit path is idle when
2142  *   the command is issued.  (For simplicity, we'll just quiesce the
2143  *   transmit path for every command.)
2144  * - There are certain sequences of commands that need to be issued to
2145  *   the hardware sequentially, with no other intervening commands.
2146  *
2147  * This leads to an implementation of a "firmware lock" as a mutex that
2148  * can be taken recursively, and which is taken by both the low-level
2149  * command submission function (mwl8k_post_cmd) as well as any users of
2150  * that function that require issuing of an atomic sequence of commands,
2151  * and quiesces the transmit path whenever it's taken.
2152  */
2153 static int mwl8k_fw_lock(struct ieee80211_hw *hw)
2154 {
2155         struct mwl8k_priv *priv = hw->priv;
2156
2157         if (priv->fw_mutex_owner != current) {
2158                 int rc;
2159
2160                 mutex_lock(&priv->fw_mutex);
2161                 ieee80211_stop_queues(hw);
2162
2163                 rc = mwl8k_tx_wait_empty(hw);
2164                 if (rc) {
2165                         if (!priv->hw_restart_in_progress)
2166                                 ieee80211_wake_queues(hw);
2167
2168                         mutex_unlock(&priv->fw_mutex);
2169
2170                         return rc;
2171                 }
2172
2173                 priv->fw_mutex_owner = current;
2174         }
2175
2176         priv->fw_mutex_depth++;
2177
2178         return 0;
2179 }
2180
2181 static void mwl8k_fw_unlock(struct ieee80211_hw *hw)
2182 {
2183         struct mwl8k_priv *priv = hw->priv;
2184
2185         if (!--priv->fw_mutex_depth) {
2186                 if (!priv->hw_restart_in_progress)
2187                         ieee80211_wake_queues(hw);
2188
2189                 priv->fw_mutex_owner = NULL;
2190                 mutex_unlock(&priv->fw_mutex);
2191         }
2192 }
2193
2194 static void mwl8k_enable_bsses(struct ieee80211_hw *hw, bool enable,
2195                                u32 bitmap);
2196
2197 /*
2198  * Command processing.
2199  */
2200
2201 /* Timeout firmware commands after 10s */
2202 #define MWL8K_CMD_TIMEOUT_MS    10000
2203
2204 static int mwl8k_post_cmd(struct ieee80211_hw *hw, struct mwl8k_cmd_pkt *cmd)
2205 {
2206         DECLARE_COMPLETION_ONSTACK(cmd_wait);
2207         struct mwl8k_priv *priv = hw->priv;
2208         void __iomem *regs = priv->regs;
2209         dma_addr_t dma_addr;
2210         unsigned int dma_size;
2211         int rc;
2212         unsigned long timeout = 0;
2213         u8 buf[32];
2214         u32 bitmap = 0;
2215
2216         wiphy_dbg(hw->wiphy, "Posting %s [%d]\n",
2217                   mwl8k_cmd_name(cmd->code, buf, sizeof(buf)), cmd->macid);
2218
2219         /* Before posting firmware commands that could change the hardware
2220          * characteristics, make sure that all BSSes are stopped temporary.
2221          * Enable these stopped BSSes after completion of the commands
2222          */
2223
2224         rc = mwl8k_fw_lock(hw);
2225         if (rc)
2226                 return rc;
2227
2228         if (priv->ap_fw && priv->running_bsses) {
2229                 switch (le16_to_cpu(cmd->code)) {
2230                 case MWL8K_CMD_SET_RF_CHANNEL:
2231                 case MWL8K_CMD_RADIO_CONTROL:
2232                 case MWL8K_CMD_RF_TX_POWER:
2233                 case MWL8K_CMD_TX_POWER:
2234                 case MWL8K_CMD_RF_ANTENNA:
2235                 case MWL8K_CMD_RTS_THRESHOLD:
2236                 case MWL8K_CMD_MIMO_CONFIG:
2237                         bitmap = priv->running_bsses;
2238                         mwl8k_enable_bsses(hw, false, bitmap);
2239                         break;
2240                 }
2241         }
2242
2243         cmd->result = (__force __le16) 0xffff;
2244         dma_size = le16_to_cpu(cmd->length);
2245         dma_addr = dma_map_single(&priv->pdev->dev, cmd, dma_size,
2246                                   DMA_BIDIRECTIONAL);
2247         if (dma_mapping_error(&priv->pdev->dev, dma_addr)) {
2248                 rc = -ENOMEM;
2249                 goto exit;
2250         }
2251
2252         priv->hostcmd_wait = &cmd_wait;
2253         iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR);
2254         iowrite32(MWL8K_H2A_INT_DOORBELL,
2255                 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
2256         iowrite32(MWL8K_H2A_INT_DUMMY,
2257                 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
2258
2259         timeout = wait_for_completion_timeout(&cmd_wait,
2260                                 msecs_to_jiffies(MWL8K_CMD_TIMEOUT_MS));
2261
2262         priv->hostcmd_wait = NULL;
2263
2264
2265         dma_unmap_single(&priv->pdev->dev, dma_addr, dma_size,
2266                          DMA_BIDIRECTIONAL);
2267
2268         if (!timeout) {
2269                 wiphy_err(hw->wiphy, "Command %s timeout after %u ms\n",
2270                           mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
2271                           MWL8K_CMD_TIMEOUT_MS);
2272                 rc = -ETIMEDOUT;
2273         } else {
2274                 int ms;
2275
2276                 ms = MWL8K_CMD_TIMEOUT_MS - jiffies_to_msecs(timeout);
2277
2278                 rc = cmd->result ? -EINVAL : 0;
2279                 if (rc)
2280                         wiphy_err(hw->wiphy, "Command %s error 0x%x\n",
2281                                   mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
2282                                   le16_to_cpu(cmd->result));
2283                 else if (ms > 2000)
2284                         wiphy_notice(hw->wiphy, "Command %s took %d ms\n",
2285                                      mwl8k_cmd_name(cmd->code,
2286                                                     buf, sizeof(buf)),
2287                                      ms);
2288         }
2289
2290 exit:
2291         if (bitmap)
2292                 mwl8k_enable_bsses(hw, true, bitmap);
2293
2294         mwl8k_fw_unlock(hw);
2295
2296         return rc;
2297 }
2298
2299 static int mwl8k_post_pervif_cmd(struct ieee80211_hw *hw,
2300                                  struct ieee80211_vif *vif,
2301                                  struct mwl8k_cmd_pkt *cmd)
2302 {
2303         if (vif != NULL)
2304                 cmd->macid = MWL8K_VIF(vif)->macid;
2305         return mwl8k_post_cmd(hw, cmd);
2306 }
2307
2308 /*
2309  * Setup code shared between STA and AP firmware images.
2310  */
2311 static void mwl8k_setup_2ghz_band(struct ieee80211_hw *hw)
2312 {
2313         struct mwl8k_priv *priv = hw->priv;
2314
2315         BUILD_BUG_ON(sizeof(priv->channels_24) != sizeof(mwl8k_channels_24));
2316         memcpy(priv->channels_24, mwl8k_channels_24, sizeof(mwl8k_channels_24));
2317
2318         BUILD_BUG_ON(sizeof(priv->rates_24) != sizeof(mwl8k_rates_24));
2319         memcpy(priv->rates_24, mwl8k_rates_24, sizeof(mwl8k_rates_24));
2320
2321         priv->band_24.band = NL80211_BAND_2GHZ;
2322         priv->band_24.channels = priv->channels_24;
2323         priv->band_24.n_channels = ARRAY_SIZE(mwl8k_channels_24);
2324         priv->band_24.bitrates = priv->rates_24;
2325         priv->band_24.n_bitrates = ARRAY_SIZE(mwl8k_rates_24);
2326
2327         hw->wiphy->bands[NL80211_BAND_2GHZ] = &priv->band_24;
2328 }
2329
2330 static void mwl8k_setup_5ghz_band(struct ieee80211_hw *hw)
2331 {
2332         struct mwl8k_priv *priv = hw->priv;
2333
2334         BUILD_BUG_ON(sizeof(priv->channels_50) != sizeof(mwl8k_channels_50));
2335         memcpy(priv->channels_50, mwl8k_channels_50, sizeof(mwl8k_channels_50));
2336
2337         BUILD_BUG_ON(sizeof(priv->rates_50) != sizeof(mwl8k_rates_50));
2338         memcpy(priv->rates_50, mwl8k_rates_50, sizeof(mwl8k_rates_50));
2339
2340         priv->band_50.band = NL80211_BAND_5GHZ;
2341         priv->band_50.channels = priv->channels_50;
2342         priv->band_50.n_channels = ARRAY_SIZE(mwl8k_channels_50);
2343         priv->band_50.bitrates = priv->rates_50;
2344         priv->band_50.n_bitrates = ARRAY_SIZE(mwl8k_rates_50);
2345
2346         hw->wiphy->bands[NL80211_BAND_5GHZ] = &priv->band_50;
2347 }
2348
2349 /*
2350  * CMD_GET_HW_SPEC (STA version).
2351  */
2352 struct mwl8k_cmd_get_hw_spec_sta {
2353         struct mwl8k_cmd_pkt header;
2354         __u8 hw_rev;
2355         __u8 host_interface;
2356         __le16 num_mcaddrs;
2357         __u8 perm_addr[ETH_ALEN];
2358         __le16 region_code;
2359         __le32 fw_rev;
2360         __le32 ps_cookie;
2361         __le32 caps;
2362         __u8 mcs_bitmap[16];
2363         __le32 rx_queue_ptr;
2364         __le32 num_tx_queues;
2365         __le32 tx_queue_ptrs[MWL8K_TX_WMM_QUEUES];
2366         __le32 caps2;
2367         __le32 num_tx_desc_per_queue;
2368         __le32 total_rxd;
2369 } __packed;
2370
2371 #define MWL8K_CAP_MAX_AMSDU             0x20000000
2372 #define MWL8K_CAP_GREENFIELD            0x08000000
2373 #define MWL8K_CAP_AMPDU                 0x04000000
2374 #define MWL8K_CAP_RX_STBC               0x01000000
2375 #define MWL8K_CAP_TX_STBC               0x00800000
2376 #define MWL8K_CAP_SHORTGI_40MHZ         0x00400000
2377 #define MWL8K_CAP_SHORTGI_20MHZ         0x00200000
2378 #define MWL8K_CAP_RX_ANTENNA_MASK       0x000e0000
2379 #define MWL8K_CAP_TX_ANTENNA_MASK       0x0001c000
2380 #define MWL8K_CAP_DELAY_BA              0x00003000
2381 #define MWL8K_CAP_MIMO                  0x00000200
2382 #define MWL8K_CAP_40MHZ                 0x00000100
2383 #define MWL8K_CAP_BAND_MASK             0x00000007
2384 #define MWL8K_CAP_5GHZ                  0x00000004
2385 #define MWL8K_CAP_2GHZ4                 0x00000001
2386
2387 static void
2388 mwl8k_set_ht_caps(struct ieee80211_hw *hw,
2389                   struct ieee80211_supported_band *band, u32 cap)
2390 {
2391         int rx_streams;
2392         int tx_streams;
2393
2394         band->ht_cap.ht_supported = 1;
2395
2396         if (cap & MWL8K_CAP_MAX_AMSDU)
2397                 band->ht_cap.cap |= IEEE80211_HT_CAP_MAX_AMSDU;
2398         if (cap & MWL8K_CAP_GREENFIELD)
2399                 band->ht_cap.cap |= IEEE80211_HT_CAP_GRN_FLD;
2400         if (cap & MWL8K_CAP_AMPDU) {
2401                 ieee80211_hw_set(hw, AMPDU_AGGREGATION);
2402                 band->ht_cap.ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
2403                 band->ht_cap.ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE;
2404         }
2405         if (cap & MWL8K_CAP_RX_STBC)
2406                 band->ht_cap.cap |= IEEE80211_HT_CAP_RX_STBC;
2407         if (cap & MWL8K_CAP_TX_STBC)
2408                 band->ht_cap.cap |= IEEE80211_HT_CAP_TX_STBC;
2409         if (cap & MWL8K_CAP_SHORTGI_40MHZ)
2410                 band->ht_cap.cap |= IEEE80211_HT_CAP_SGI_40;
2411         if (cap & MWL8K_CAP_SHORTGI_20MHZ)
2412                 band->ht_cap.cap |= IEEE80211_HT_CAP_SGI_20;
2413         if (cap & MWL8K_CAP_DELAY_BA)
2414                 band->ht_cap.cap |= IEEE80211_HT_CAP_DELAY_BA;
2415         if (cap & MWL8K_CAP_40MHZ)
2416                 band->ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2417
2418         rx_streams = hweight32(cap & MWL8K_CAP_RX_ANTENNA_MASK);
2419         tx_streams = hweight32(cap & MWL8K_CAP_TX_ANTENNA_MASK);
2420
2421         band->ht_cap.mcs.rx_mask[0] = 0xff;
2422         if (rx_streams >= 2)
2423                 band->ht_cap.mcs.rx_mask[1] = 0xff;
2424         if (rx_streams >= 3)
2425                 band->ht_cap.mcs.rx_mask[2] = 0xff;
2426         band->ht_cap.mcs.rx_mask[4] = 0x01;
2427         band->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
2428
2429         if (rx_streams != tx_streams) {
2430                 band->ht_cap.mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
2431                 band->ht_cap.mcs.tx_params |= (tx_streams - 1) <<
2432                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
2433         }
2434 }
2435
2436 static void
2437 mwl8k_set_caps(struct ieee80211_hw *hw, u32 caps)
2438 {
2439         struct mwl8k_priv *priv = hw->priv;
2440
2441         if (priv->caps)
2442                 return;
2443
2444         if ((caps & MWL8K_CAP_2GHZ4) || !(caps & MWL8K_CAP_BAND_MASK)) {
2445                 mwl8k_setup_2ghz_band(hw);
2446                 if (caps & MWL8K_CAP_MIMO)
2447                         mwl8k_set_ht_caps(hw, &priv->band_24, caps);
2448         }
2449
2450         if (caps & MWL8K_CAP_5GHZ) {
2451                 mwl8k_setup_5ghz_band(hw);
2452                 if (caps & MWL8K_CAP_MIMO)
2453                         mwl8k_set_ht_caps(hw, &priv->band_50, caps);
2454         }
2455
2456         priv->caps = caps;
2457 }
2458
2459 static int mwl8k_cmd_get_hw_spec_sta(struct ieee80211_hw *hw)
2460 {
2461         struct mwl8k_priv *priv = hw->priv;
2462         struct mwl8k_cmd_get_hw_spec_sta *cmd;
2463         int rc;
2464         int i;
2465
2466         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2467         if (cmd == NULL)
2468                 return -ENOMEM;
2469
2470         cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_HW_SPEC);
2471         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2472
2473         memset(cmd->perm_addr, 0xff, sizeof(cmd->perm_addr));
2474         cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2475         cmd->rx_queue_ptr = cpu_to_le32(priv->rxq[0].rxd_dma);
2476         cmd->num_tx_queues = cpu_to_le32(mwl8k_tx_queues(priv));
2477         for (i = 0; i < mwl8k_tx_queues(priv); i++)
2478                 cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[i].txd_dma);
2479         cmd->num_tx_desc_per_queue = cpu_to_le32(MWL8K_TX_DESCS);
2480         cmd->total_rxd = cpu_to_le32(MWL8K_RX_DESCS);
2481
2482         rc = mwl8k_post_cmd(hw, &cmd->header);
2483
2484         if (!rc) {
2485                 SET_IEEE80211_PERM_ADDR(hw, cmd->perm_addr);
2486                 priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs);
2487                 priv->fw_rev = le32_to_cpu(cmd->fw_rev);
2488                 priv->hw_rev = cmd->hw_rev;
2489                 mwl8k_set_caps(hw, le32_to_cpu(cmd->caps));
2490                 priv->ap_macids_supported = 0x00000000;
2491                 priv->sta_macids_supported = 0x00000001;
2492         }
2493
2494         kfree(cmd);
2495         return rc;
2496 }
2497
2498 /*
2499  * CMD_GET_HW_SPEC (AP version).
2500  */
2501 struct mwl8k_cmd_get_hw_spec_ap {
2502         struct mwl8k_cmd_pkt header;
2503         __u8 hw_rev;
2504         __u8 host_interface;
2505         __le16 num_wcb;
2506         __le16 num_mcaddrs;
2507         __u8 perm_addr[ETH_ALEN];
2508         __le16 region_code;
2509         __le16 num_antenna;
2510         __le32 fw_rev;
2511         __le32 wcbbase0;
2512         __le32 rxwrptr;
2513         __le32 rxrdptr;
2514         __le32 ps_cookie;
2515         __le32 wcbbase1;
2516         __le32 wcbbase2;
2517         __le32 wcbbase3;
2518         __le32 fw_api_version;
2519         __le32 caps;
2520         __le32 num_of_ampdu_queues;
2521         __le32 wcbbase_ampdu[MWL8K_MAX_AMPDU_QUEUES];
2522 } __packed;
2523
2524 static int mwl8k_cmd_get_hw_spec_ap(struct ieee80211_hw *hw)
2525 {
2526         struct mwl8k_priv *priv = hw->priv;
2527         struct mwl8k_cmd_get_hw_spec_ap *cmd;
2528         int rc, i;
2529         u32 api_version;
2530
2531         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2532         if (cmd == NULL)
2533                 return -ENOMEM;
2534
2535         cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_HW_SPEC);
2536         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2537
2538         memset(cmd->perm_addr, 0xff, sizeof(cmd->perm_addr));
2539         cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2540
2541         rc = mwl8k_post_cmd(hw, &cmd->header);
2542
2543         if (!rc) {
2544                 int off;
2545
2546                 api_version = le32_to_cpu(cmd->fw_api_version);
2547                 if (priv->device_info->fw_api_ap != api_version) {
2548                         printk(KERN_ERR "%s: Unsupported fw API version for %s."
2549                                "  Expected %d got %d.\n", MWL8K_NAME,
2550                                priv->device_info->part_name,
2551                                priv->device_info->fw_api_ap,
2552                                api_version);
2553                         rc = -EINVAL;
2554                         goto done;
2555                 }
2556                 SET_IEEE80211_PERM_ADDR(hw, cmd->perm_addr);
2557                 priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs);
2558                 priv->fw_rev = le32_to_cpu(cmd->fw_rev);
2559                 priv->hw_rev = cmd->hw_rev;
2560                 mwl8k_set_caps(hw, le32_to_cpu(cmd->caps));
2561                 priv->ap_macids_supported = 0x000000ff;
2562                 priv->sta_macids_supported = 0x00000100;
2563                 priv->num_ampdu_queues = le32_to_cpu(cmd->num_of_ampdu_queues);
2564                 if (priv->num_ampdu_queues > MWL8K_MAX_AMPDU_QUEUES) {
2565                         wiphy_warn(hw->wiphy, "fw reported %d ampdu queues"
2566                                    " but we only support %d.\n",
2567                                    priv->num_ampdu_queues,
2568                                    MWL8K_MAX_AMPDU_QUEUES);
2569                         priv->num_ampdu_queues = MWL8K_MAX_AMPDU_QUEUES;
2570                 }
2571                 off = le32_to_cpu(cmd->rxwrptr) & 0xffff;
2572                 iowrite32(priv->rxq[0].rxd_dma, priv->sram + off);
2573
2574                 off = le32_to_cpu(cmd->rxrdptr) & 0xffff;
2575                 iowrite32(priv->rxq[0].rxd_dma, priv->sram + off);
2576
2577                 priv->txq_offset[0] = le32_to_cpu(cmd->wcbbase0) & 0xffff;
2578                 priv->txq_offset[1] = le32_to_cpu(cmd->wcbbase1) & 0xffff;
2579                 priv->txq_offset[2] = le32_to_cpu(cmd->wcbbase2) & 0xffff;
2580                 priv->txq_offset[3] = le32_to_cpu(cmd->wcbbase3) & 0xffff;
2581
2582                 for (i = 0; i < priv->num_ampdu_queues; i++)
2583                         priv->txq_offset[i + MWL8K_TX_WMM_QUEUES] =
2584                                 le32_to_cpu(cmd->wcbbase_ampdu[i]) & 0xffff;
2585         }
2586
2587 done:
2588         kfree(cmd);
2589         return rc;
2590 }
2591
2592 /*
2593  * CMD_SET_HW_SPEC.
2594  */
2595 struct mwl8k_cmd_set_hw_spec {
2596         struct mwl8k_cmd_pkt header;
2597         __u8 hw_rev;
2598         __u8 host_interface;
2599         __le16 num_mcaddrs;
2600         __u8 perm_addr[ETH_ALEN];
2601         __le16 region_code;
2602         __le32 fw_rev;
2603         __le32 ps_cookie;
2604         __le32 caps;
2605         __le32 rx_queue_ptr;
2606         __le32 num_tx_queues;
2607         __le32 tx_queue_ptrs[MWL8K_MAX_TX_QUEUES];
2608         __le32 flags;
2609         __le32 num_tx_desc_per_queue;
2610         __le32 total_rxd;
2611 } __packed;
2612
2613 /* If enabled, MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY will cause
2614  * packets to expire 500 ms after the timestamp in the tx descriptor.  That is,
2615  * the packets that are queued for more than 500ms, will be dropped in the
2616  * hardware. This helps minimizing the issues caused due to head-of-line
2617  * blocking where a slow client can hog the bandwidth and affect traffic to a
2618  * faster client.
2619  */
2620 #define MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY  0x00000400
2621 #define MWL8K_SET_HW_SPEC_FLAG_GENERATE_CCMP_HDR        0x00000200
2622 #define MWL8K_SET_HW_SPEC_FLAG_HOST_DECR_MGMT           0x00000080
2623 #define MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_PROBERESP       0x00000020
2624 #define MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_BEACON          0x00000010
2625
2626 static int mwl8k_cmd_set_hw_spec(struct ieee80211_hw *hw)
2627 {
2628         struct mwl8k_priv *priv = hw->priv;
2629         struct mwl8k_cmd_set_hw_spec *cmd;
2630         int rc;
2631         int i;
2632
2633         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2634         if (cmd == NULL)
2635                 return -ENOMEM;
2636
2637         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_HW_SPEC);
2638         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2639
2640         cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2641         cmd->rx_queue_ptr = cpu_to_le32(priv->rxq[0].rxd_dma);
2642         cmd->num_tx_queues = cpu_to_le32(mwl8k_tx_queues(priv));
2643
2644         /*
2645          * Mac80211 stack has Q0 as highest priority and Q3 as lowest in
2646          * that order. Firmware has Q3 as highest priority and Q0 as lowest
2647          * in that order. Map Q3 of mac80211 to Q0 of firmware so that the
2648          * priority is interpreted the right way in firmware.
2649          */
2650         for (i = 0; i < mwl8k_tx_queues(priv); i++) {
2651                 int j = mwl8k_tx_queues(priv) - 1 - i;
2652                 cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[j].txd_dma);
2653         }
2654
2655         cmd->flags = cpu_to_le32(MWL8K_SET_HW_SPEC_FLAG_HOST_DECR_MGMT |
2656                                  MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_PROBERESP |
2657                                  MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_BEACON |
2658                                  MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY |
2659                                  MWL8K_SET_HW_SPEC_FLAG_GENERATE_CCMP_HDR);
2660         cmd->num_tx_desc_per_queue = cpu_to_le32(MWL8K_TX_DESCS);
2661         cmd->total_rxd = cpu_to_le32(MWL8K_RX_DESCS);
2662
2663         rc = mwl8k_post_cmd(hw, &cmd->header);
2664         kfree(cmd);
2665
2666         return rc;
2667 }
2668
2669 /*
2670  * CMD_MAC_MULTICAST_ADR.
2671  */
2672 struct mwl8k_cmd_mac_multicast_adr {
2673         struct mwl8k_cmd_pkt header;
2674         __le16 action;
2675         __le16 numaddr;
2676         __u8 addr[][ETH_ALEN];
2677 };
2678
2679 #define MWL8K_ENABLE_RX_DIRECTED        0x0001
2680 #define MWL8K_ENABLE_RX_MULTICAST       0x0002
2681 #define MWL8K_ENABLE_RX_ALL_MULTICAST   0x0004
2682 #define MWL8K_ENABLE_RX_BROADCAST       0x0008
2683
2684 static struct mwl8k_cmd_pkt *
2685 __mwl8k_cmd_mac_multicast_adr(struct ieee80211_hw *hw, int allmulti,
2686                               struct netdev_hw_addr_list *mc_list)
2687 {
2688         struct mwl8k_priv *priv = hw->priv;
2689         struct mwl8k_cmd_mac_multicast_adr *cmd;
2690         int size;
2691         int mc_count = 0;
2692
2693         if (mc_list)
2694                 mc_count = netdev_hw_addr_list_count(mc_list);
2695
2696         if (allmulti || mc_count > priv->num_mcaddrs) {
2697                 allmulti = 1;
2698                 mc_count = 0;
2699         }
2700
2701         size = sizeof(*cmd) + mc_count * ETH_ALEN;
2702
2703         cmd = kzalloc(size, GFP_ATOMIC);
2704         if (cmd == NULL)
2705                 return NULL;
2706
2707         cmd->header.code = cpu_to_le16(MWL8K_CMD_MAC_MULTICAST_ADR);
2708         cmd->header.length = cpu_to_le16(size);
2709         cmd->action = cpu_to_le16(MWL8K_ENABLE_RX_DIRECTED |
2710                                   MWL8K_ENABLE_RX_BROADCAST);
2711
2712         if (allmulti) {
2713                 cmd->action |= cpu_to_le16(MWL8K_ENABLE_RX_ALL_MULTICAST);
2714         } else if (mc_count) {
2715                 struct netdev_hw_addr *ha;
2716                 int i = 0;
2717
2718                 cmd->action |= cpu_to_le16(MWL8K_ENABLE_RX_MULTICAST);
2719                 cmd->numaddr = cpu_to_le16(mc_count);
2720                 netdev_hw_addr_list_for_each(ha, mc_list) {
2721                         memcpy(cmd->addr[i], ha->addr, ETH_ALEN);
2722                 }
2723         }
2724
2725         return &cmd->header;
2726 }
2727
2728 /*
2729  * CMD_GET_STAT.
2730  */
2731 struct mwl8k_cmd_get_stat {
2732         struct mwl8k_cmd_pkt header;
2733         __le32 stats[64];
2734 } __packed;
2735
2736 #define MWL8K_STAT_ACK_FAILURE  9
2737 #define MWL8K_STAT_RTS_FAILURE  12
2738 #define MWL8K_STAT_FCS_ERROR    24
2739 #define MWL8K_STAT_RTS_SUCCESS  11
2740
2741 static int mwl8k_cmd_get_stat(struct ieee80211_hw *hw,
2742                               struct ieee80211_low_level_stats *stats)
2743 {
2744         struct mwl8k_cmd_get_stat *cmd;
2745         int rc;
2746
2747         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2748         if (cmd == NULL)
2749                 return -ENOMEM;
2750
2751         cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_STAT);
2752         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2753
2754         rc = mwl8k_post_cmd(hw, &cmd->header);
2755         if (!rc) {
2756                 stats->dot11ACKFailureCount =
2757                         le32_to_cpu(cmd->stats[MWL8K_STAT_ACK_FAILURE]);
2758                 stats->dot11RTSFailureCount =
2759                         le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_FAILURE]);
2760                 stats->dot11FCSErrorCount =
2761                         le32_to_cpu(cmd->stats[MWL8K_STAT_FCS_ERROR]);
2762                 stats->dot11RTSSuccessCount =
2763                         le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_SUCCESS]);
2764         }
2765         kfree(cmd);
2766
2767         return rc;
2768 }
2769
2770 /*
2771  * CMD_RADIO_CONTROL.
2772  */
2773 struct mwl8k_cmd_radio_control {
2774         struct mwl8k_cmd_pkt header;
2775         __le16 action;
2776         __le16 control;
2777         __le16 radio_on;
2778 } __packed;
2779
2780 static int
2781 mwl8k_cmd_radio_control(struct ieee80211_hw *hw, bool enable, bool force)
2782 {
2783         struct mwl8k_priv *priv = hw->priv;
2784         struct mwl8k_cmd_radio_control *cmd;
2785         int rc;
2786
2787         if (enable == priv->radio_on && !force)
2788                 return 0;
2789
2790         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2791         if (cmd == NULL)
2792                 return -ENOMEM;
2793
2794         cmd->header.code = cpu_to_le16(MWL8K_CMD_RADIO_CONTROL);
2795         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2796         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
2797         cmd->control = cpu_to_le16(priv->radio_short_preamble ? 3 : 1);
2798         cmd->radio_on = cpu_to_le16(enable ? 0x0001 : 0x0000);
2799
2800         rc = mwl8k_post_cmd(hw, &cmd->header);
2801         kfree(cmd);
2802
2803         if (!rc)
2804                 priv->radio_on = enable;
2805
2806         return rc;
2807 }
2808
2809 static int mwl8k_cmd_radio_disable(struct ieee80211_hw *hw)
2810 {
2811         return mwl8k_cmd_radio_control(hw, 0, 0);
2812 }
2813
2814 static int mwl8k_cmd_radio_enable(struct ieee80211_hw *hw)
2815 {
2816         return mwl8k_cmd_radio_control(hw, 1, 0);
2817 }
2818
2819 static int
2820 mwl8k_set_radio_preamble(struct ieee80211_hw *hw, bool short_preamble)
2821 {
2822         struct mwl8k_priv *priv = hw->priv;
2823
2824         priv->radio_short_preamble = short_preamble;
2825
2826         return mwl8k_cmd_radio_control(hw, 1, 1);
2827 }
2828
2829 /*
2830  * CMD_RF_TX_POWER.
2831  */
2832 #define MWL8K_RF_TX_POWER_LEVEL_TOTAL   8
2833
2834 struct mwl8k_cmd_rf_tx_power {
2835         struct mwl8k_cmd_pkt header;
2836         __le16 action;
2837         __le16 support_level;
2838         __le16 current_level;
2839         __le16 reserved;
2840         __le16 power_level_list[MWL8K_RF_TX_POWER_LEVEL_TOTAL];
2841 } __packed;
2842
2843 static int mwl8k_cmd_rf_tx_power(struct ieee80211_hw *hw, int dBm)
2844 {
2845         struct mwl8k_cmd_rf_tx_power *cmd;
2846         int rc;
2847
2848         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2849         if (cmd == NULL)
2850                 return -ENOMEM;
2851
2852         cmd->header.code = cpu_to_le16(MWL8K_CMD_RF_TX_POWER);
2853         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2854         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
2855         cmd->support_level = cpu_to_le16(dBm);
2856
2857         rc = mwl8k_post_cmd(hw, &cmd->header);
2858         kfree(cmd);
2859
2860         return rc;
2861 }
2862
2863 /*
2864  * CMD_TX_POWER.
2865  */
2866 #define MWL8K_TX_POWER_LEVEL_TOTAL      12
2867
2868 struct mwl8k_cmd_tx_power {
2869         struct mwl8k_cmd_pkt header;
2870         __le16 action;
2871         __le16 band;
2872         __le16 channel;
2873         __le16 bw;
2874         __le16 sub_ch;
2875         __le16 power_level_list[MWL8K_TX_POWER_LEVEL_TOTAL];
2876 } __packed;
2877
2878 static int mwl8k_cmd_tx_power(struct ieee80211_hw *hw,
2879                                      struct ieee80211_conf *conf,
2880                                      unsigned short pwr)
2881 {
2882         struct ieee80211_channel *channel = conf->chandef.chan;
2883         enum nl80211_channel_type channel_type =
2884                 cfg80211_get_chandef_type(&conf->chandef);
2885         struct mwl8k_cmd_tx_power *cmd;
2886         int rc;
2887         int i;
2888
2889         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2890         if (cmd == NULL)
2891                 return -ENOMEM;
2892
2893         cmd->header.code = cpu_to_le16(MWL8K_CMD_TX_POWER);
2894         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2895         cmd->action = cpu_to_le16(MWL8K_CMD_SET_LIST);
2896
2897         if (channel->band == NL80211_BAND_2GHZ)
2898                 cmd->band = cpu_to_le16(0x1);
2899         else if (channel->band == NL80211_BAND_5GHZ)
2900                 cmd->band = cpu_to_le16(0x4);
2901
2902         cmd->channel = cpu_to_le16(channel->hw_value);
2903
2904         if (channel_type == NL80211_CHAN_NO_HT ||
2905             channel_type == NL80211_CHAN_HT20) {
2906                 cmd->bw = cpu_to_le16(0x2);
2907         } else {
2908                 cmd->bw = cpu_to_le16(0x4);
2909                 if (channel_type == NL80211_CHAN_HT40MINUS)
2910                         cmd->sub_ch = cpu_to_le16(0x3);
2911                 else if (channel_type == NL80211_CHAN_HT40PLUS)
2912                         cmd->sub_ch = cpu_to_le16(0x1);
2913         }
2914
2915         for (i = 0; i < MWL8K_TX_POWER_LEVEL_TOTAL; i++)
2916                 cmd->power_level_list[i] = cpu_to_le16(pwr);
2917
2918         rc = mwl8k_post_cmd(hw, &cmd->header);
2919         kfree(cmd);
2920
2921         return rc;
2922 }
2923
2924 /*
2925  * CMD_RF_ANTENNA.
2926  */
2927 struct mwl8k_cmd_rf_antenna {
2928         struct mwl8k_cmd_pkt header;
2929         __le16 antenna;
2930         __le16 mode;
2931 } __packed;
2932
2933 #define MWL8K_RF_ANTENNA_RX             1
2934 #define MWL8K_RF_ANTENNA_TX             2
2935
2936 static int
2937 mwl8k_cmd_rf_antenna(struct ieee80211_hw *hw, int antenna, int mask)
2938 {
2939         struct mwl8k_cmd_rf_antenna *cmd;
2940         int rc;
2941
2942         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2943         if (cmd == NULL)
2944                 return -ENOMEM;
2945
2946         cmd->header.code = cpu_to_le16(MWL8K_CMD_RF_ANTENNA);
2947         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2948         cmd->antenna = cpu_to_le16(antenna);
2949         cmd->mode = cpu_to_le16(mask);
2950
2951         rc = mwl8k_post_cmd(hw, &cmd->header);
2952         kfree(cmd);
2953
2954         return rc;
2955 }
2956
2957 /*
2958  * CMD_SET_BEACON.
2959  */
2960 struct mwl8k_cmd_set_beacon {
2961         struct mwl8k_cmd_pkt header;
2962         __le16 beacon_len;
2963         __u8 beacon[];
2964 };
2965
2966 static int mwl8k_cmd_set_beacon(struct ieee80211_hw *hw,
2967                                 struct ieee80211_vif *vif, u8 *beacon, int len)
2968 {
2969         struct mwl8k_cmd_set_beacon *cmd;
2970         int rc;
2971
2972         cmd = kzalloc(sizeof(*cmd) + len, GFP_KERNEL);
2973         if (cmd == NULL)
2974                 return -ENOMEM;
2975
2976         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_BEACON);
2977         cmd->header.length = cpu_to_le16(sizeof(*cmd) + len);
2978         cmd->beacon_len = cpu_to_le16(len);
2979         memcpy(cmd->beacon, beacon, len);
2980
2981         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
2982         kfree(cmd);
2983
2984         return rc;
2985 }
2986
2987 /*
2988  * CMD_SET_PRE_SCAN.
2989  */
2990 struct mwl8k_cmd_set_pre_scan {
2991         struct mwl8k_cmd_pkt header;
2992 } __packed;
2993
2994 static int mwl8k_cmd_set_pre_scan(struct ieee80211_hw *hw)
2995 {
2996         struct mwl8k_cmd_set_pre_scan *cmd;
2997         int rc;
2998
2999         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3000         if (cmd == NULL)
3001                 return -ENOMEM;
3002
3003         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_PRE_SCAN);
3004         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3005
3006         rc = mwl8k_post_cmd(hw, &cmd->header);
3007         kfree(cmd);
3008
3009         return rc;
3010 }
3011
3012 /*
3013  * CMD_BBP_REG_ACCESS.
3014  */
3015 struct mwl8k_cmd_bbp_reg_access {
3016         struct mwl8k_cmd_pkt header;
3017         __le16 action;
3018         __le16 offset;
3019         u8 value;
3020         u8 rsrv[3];
3021 } __packed;
3022
3023 static int
3024 mwl8k_cmd_bbp_reg_access(struct ieee80211_hw *hw,
3025                          u16 action,
3026                          u16 offset,
3027                          u8 *value)
3028 {
3029         struct mwl8k_cmd_bbp_reg_access *cmd;
3030         int rc;
3031
3032         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3033         if (cmd == NULL)
3034                 return -ENOMEM;
3035
3036         cmd->header.code = cpu_to_le16(MWL8K_CMD_BBP_REG_ACCESS);
3037         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3038         cmd->action = cpu_to_le16(action);
3039         cmd->offset = cpu_to_le16(offset);
3040
3041         rc = mwl8k_post_cmd(hw, &cmd->header);
3042
3043         if (!rc)
3044                 *value = cmd->value;
3045         else
3046                 *value = 0;
3047
3048         kfree(cmd);
3049
3050         return rc;
3051 }
3052
3053 /*
3054  * CMD_SET_POST_SCAN.
3055  */
3056 struct mwl8k_cmd_set_post_scan {
3057         struct mwl8k_cmd_pkt header;
3058         __le32 isibss;
3059         __u8 bssid[ETH_ALEN];
3060 } __packed;
3061
3062 static int
3063 mwl8k_cmd_set_post_scan(struct ieee80211_hw *hw, const __u8 *mac)
3064 {
3065         struct mwl8k_cmd_set_post_scan *cmd;
3066         int rc;
3067
3068         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3069         if (cmd == NULL)
3070                 return -ENOMEM;
3071
3072         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_POST_SCAN);
3073         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3074         cmd->isibss = 0;
3075         memcpy(cmd->bssid, mac, ETH_ALEN);
3076
3077         rc = mwl8k_post_cmd(hw, &cmd->header);
3078         kfree(cmd);
3079
3080         return rc;
3081 }
3082
3083 static int freq_to_idx(struct mwl8k_priv *priv, int freq)
3084 {
3085         struct ieee80211_supported_band *sband;
3086         int band, ch, idx = 0;
3087
3088         for (band = NL80211_BAND_2GHZ; band < NUM_NL80211_BANDS; band++) {
3089                 sband = priv->hw->wiphy->bands[band];
3090                 if (!sband)
3091                         continue;
3092
3093                 for (ch = 0; ch < sband->n_channels; ch++, idx++)
3094                         if (sband->channels[ch].center_freq == freq)
3095                                 goto exit;
3096         }
3097
3098 exit:
3099         return idx;
3100 }
3101
3102 static void mwl8k_update_survey(struct mwl8k_priv *priv,
3103                                 struct ieee80211_channel *channel)
3104 {
3105         u32 cca_cnt, rx_rdy;
3106         s8 nf = 0, idx;
3107         struct survey_info *survey;
3108
3109         idx = freq_to_idx(priv, priv->acs_chan->center_freq);
3110         if (idx >= MWL8K_NUM_CHANS) {
3111                 wiphy_err(priv->hw->wiphy, "Failed to update survey\n");
3112                 return;
3113         }
3114
3115         survey = &priv->survey[idx];
3116
3117         cca_cnt = ioread32(priv->regs + NOK_CCA_CNT_REG);
3118         cca_cnt /= 1000; /* uSecs to mSecs */
3119         survey->time_busy = (u64) cca_cnt;
3120
3121         rx_rdy = ioread32(priv->regs + BBU_RXRDY_CNT_REG);
3122         rx_rdy /= 1000; /* uSecs to mSecs */
3123         survey->time_rx = (u64) rx_rdy;
3124
3125         priv->channel_time = jiffies - priv->channel_time;
3126         survey->time = jiffies_to_msecs(priv->channel_time);
3127
3128         survey->channel = channel;
3129
3130         mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &nf);
3131
3132         /* Make sure sign is negative else ACS  at hostapd fails */
3133         survey->noise = nf * -1;
3134
3135         survey->filled = SURVEY_INFO_NOISE_DBM |
3136                          SURVEY_INFO_TIME |
3137                          SURVEY_INFO_TIME_BUSY |
3138                          SURVEY_INFO_TIME_RX;
3139 }
3140
3141 /*
3142  * CMD_SET_RF_CHANNEL.
3143  */
3144 struct mwl8k_cmd_set_rf_channel {
3145         struct mwl8k_cmd_pkt header;
3146         __le16 action;
3147         __u8 current_channel;
3148         __le32 channel_flags;
3149 } __packed;
3150
3151 static int mwl8k_cmd_set_rf_channel(struct ieee80211_hw *hw,
3152                                     struct ieee80211_conf *conf)
3153 {
3154         struct ieee80211_channel *channel = conf->chandef.chan;
3155         enum nl80211_channel_type channel_type =
3156                 cfg80211_get_chandef_type(&conf->chandef);
3157         struct mwl8k_cmd_set_rf_channel *cmd;
3158         struct mwl8k_priv *priv = hw->priv;
3159         int rc;
3160
3161         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3162         if (cmd == NULL)
3163                 return -ENOMEM;
3164
3165         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RF_CHANNEL);
3166         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3167         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3168         cmd->current_channel = channel->hw_value;
3169
3170         if (channel->band == NL80211_BAND_2GHZ)
3171                 cmd->channel_flags |= cpu_to_le32(0x00000001);
3172         else if (channel->band == NL80211_BAND_5GHZ)
3173                 cmd->channel_flags |= cpu_to_le32(0x00000004);
3174
3175         if (!priv->sw_scan_start) {
3176                 if (channel_type == NL80211_CHAN_NO_HT ||
3177                     channel_type == NL80211_CHAN_HT20)
3178                         cmd->channel_flags |= cpu_to_le32(0x00000080);
3179                 else if (channel_type == NL80211_CHAN_HT40MINUS)
3180                         cmd->channel_flags |= cpu_to_le32(0x000001900);
3181                 else if (channel_type == NL80211_CHAN_HT40PLUS)
3182                         cmd->channel_flags |= cpu_to_le32(0x000000900);
3183         } else {
3184                 cmd->channel_flags |= cpu_to_le32(0x00000080);
3185         }
3186
3187         if (priv->sw_scan_start) {
3188                 /* Store current channel stats
3189                  * before switching to newer one.
3190                  * This will be processed only for AP fw.
3191                  */
3192                 if (priv->channel_time != 0)
3193                         mwl8k_update_survey(priv, priv->acs_chan);
3194
3195                 priv->channel_time = jiffies;
3196                 priv->acs_chan =  channel;
3197         }
3198
3199         rc = mwl8k_post_cmd(hw, &cmd->header);
3200         kfree(cmd);
3201
3202         return rc;
3203 }
3204
3205 /*
3206  * CMD_SET_AID.
3207  */
3208 #define MWL8K_FRAME_PROT_DISABLED                       0x00
3209 #define MWL8K_FRAME_PROT_11G                            0x07
3210 #define MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY              0x02
3211 #define MWL8K_FRAME_PROT_11N_HT_ALL                     0x06
3212
3213 struct mwl8k_cmd_update_set_aid {
3214         struct  mwl8k_cmd_pkt header;
3215         __le16  aid;
3216
3217          /* AP's MAC address (BSSID) */
3218         __u8    bssid[ETH_ALEN];
3219         __le16  protection_mode;
3220         __u8    supp_rates[14];
3221 } __packed;
3222
3223 static void legacy_rate_mask_to_array(u8 *rates, u32 mask)
3224 {
3225         int i;
3226         int j;
3227
3228         /*
3229          * Clear nonstandard rate 4.
3230          */
3231         mask &= 0x1fef;
3232
3233         for (i = 0, j = 0; i < 13; i++) {
3234                 if (mask & (1 << i))
3235                         rates[j++] = mwl8k_rates_24[i].hw_value;
3236         }
3237 }
3238
3239 static int
3240 mwl8k_cmd_set_aid(struct ieee80211_hw *hw,
3241                   struct ieee80211_vif *vif, u32 legacy_rate_mask)
3242 {
3243         struct mwl8k_cmd_update_set_aid *cmd;
3244         u16 prot_mode;
3245         int rc;
3246
3247         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3248         if (cmd == NULL)
3249                 return -ENOMEM;
3250
3251         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_AID);
3252         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3253         cmd->aid = cpu_to_le16(vif->bss_conf.aid);
3254         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
3255
3256         if (vif->bss_conf.use_cts_prot) {
3257                 prot_mode = MWL8K_FRAME_PROT_11G;
3258         } else {
3259                 switch (vif->bss_conf.ht_operation_mode &
3260                         IEEE80211_HT_OP_MODE_PROTECTION) {
3261                 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
3262                         prot_mode = MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY;
3263                         break;
3264                 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
3265                         prot_mode = MWL8K_FRAME_PROT_11N_HT_ALL;
3266                         break;
3267                 default:
3268                         prot_mode = MWL8K_FRAME_PROT_DISABLED;
3269                         break;
3270                 }
3271         }
3272         cmd->protection_mode = cpu_to_le16(prot_mode);
3273
3274         legacy_rate_mask_to_array(cmd->supp_rates, legacy_rate_mask);
3275
3276         rc = mwl8k_post_cmd(hw, &cmd->header);
3277         kfree(cmd);
3278
3279         return rc;
3280 }
3281
3282 /*
3283  * CMD_SET_RATE.
3284  */
3285 struct mwl8k_cmd_set_rate {
3286         struct  mwl8k_cmd_pkt header;
3287         __u8    legacy_rates[14];
3288
3289         /* Bitmap for supported MCS codes.  */
3290         __u8    mcs_set[16];
3291         __u8    reserved[16];
3292 } __packed;
3293
3294 static int
3295 mwl8k_cmd_set_rate(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
3296                    u32 legacy_rate_mask, u8 *mcs_rates)
3297 {
3298         struct mwl8k_cmd_set_rate *cmd;
3299         int rc;
3300
3301         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3302         if (cmd == NULL)
3303                 return -ENOMEM;
3304
3305         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATE);
3306         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3307         legacy_rate_mask_to_array(cmd->legacy_rates, legacy_rate_mask);
3308         memcpy(cmd->mcs_set, mcs_rates, 16);
3309
3310         rc = mwl8k_post_cmd(hw, &cmd->header);
3311         kfree(cmd);
3312
3313         return rc;
3314 }
3315
3316 /*
3317  * CMD_FINALIZE_JOIN.
3318  */
3319 #define MWL8K_FJ_BEACON_MAXLEN  128
3320
3321 struct mwl8k_cmd_finalize_join {
3322         struct mwl8k_cmd_pkt header;
3323         __le32 sleep_interval;  /* Number of beacon periods to sleep */
3324         __u8 beacon_data[MWL8K_FJ_BEACON_MAXLEN];
3325 } __packed;
3326
3327 static int mwl8k_cmd_finalize_join(struct ieee80211_hw *hw, void *frame,
3328                                    int framelen, int dtim)
3329 {
3330         struct mwl8k_cmd_finalize_join *cmd;
3331         struct ieee80211_mgmt *payload = frame;
3332         int payload_len;
3333         int rc;
3334
3335         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3336         if (cmd == NULL)
3337                 return -ENOMEM;
3338
3339         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_FINALIZE_JOIN);
3340         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3341         cmd->sleep_interval = cpu_to_le32(dtim ? dtim : 1);
3342
3343         payload_len = framelen - ieee80211_hdrlen(payload->frame_control);
3344         if (payload_len < 0)
3345                 payload_len = 0;
3346         else if (payload_len > MWL8K_FJ_BEACON_MAXLEN)
3347                 payload_len = MWL8K_FJ_BEACON_MAXLEN;
3348
3349         memcpy(cmd->beacon_data, &payload->u.beacon, payload_len);
3350
3351         rc = mwl8k_post_cmd(hw, &cmd->header);
3352         kfree(cmd);
3353
3354         return rc;
3355 }
3356
3357 /*
3358  * CMD_SET_RTS_THRESHOLD.
3359  */
3360 struct mwl8k_cmd_set_rts_threshold {
3361         struct mwl8k_cmd_pkt header;
3362         __le16 action;
3363         __le16 threshold;
3364 } __packed;
3365
3366 static int
3367 mwl8k_cmd_set_rts_threshold(struct ieee80211_hw *hw, int rts_thresh)
3368 {
3369         struct mwl8k_cmd_set_rts_threshold *cmd;
3370         int rc;
3371
3372         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3373         if (cmd == NULL)
3374                 return -ENOMEM;
3375
3376         cmd->header.code = cpu_to_le16(MWL8K_CMD_RTS_THRESHOLD);
3377         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3378         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3379         cmd->threshold = cpu_to_le16(rts_thresh);
3380
3381         rc = mwl8k_post_cmd(hw, &cmd->header);
3382         kfree(cmd);
3383
3384         return rc;
3385 }
3386
3387 /*
3388  * CMD_SET_SLOT.
3389  */
3390 struct mwl8k_cmd_set_slot {
3391         struct mwl8k_cmd_pkt header;
3392         __le16 action;
3393         __u8 short_slot;
3394 } __packed;
3395
3396 static int mwl8k_cmd_set_slot(struct ieee80211_hw *hw, bool short_slot_time)
3397 {
3398         struct mwl8k_cmd_set_slot *cmd;
3399         int rc;
3400
3401         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3402         if (cmd == NULL)
3403                 return -ENOMEM;
3404
3405         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_SLOT);
3406         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3407         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3408         cmd->short_slot = short_slot_time;
3409
3410         rc = mwl8k_post_cmd(hw, &cmd->header);
3411         kfree(cmd);
3412
3413         return rc;
3414 }
3415
3416 /*
3417  * CMD_SET_EDCA_PARAMS.
3418  */
3419 struct mwl8k_cmd_set_edca_params {
3420         struct mwl8k_cmd_pkt header;
3421
3422         /* See MWL8K_SET_EDCA_XXX below */
3423         __le16 action;
3424
3425         /* TX opportunity in units of 32 us */
3426         __le16 txop;
3427
3428         union {
3429                 struct {
3430                         /* Log exponent of max contention period: 0...15 */
3431                         __le32 log_cw_max;
3432
3433                         /* Log exponent of min contention period: 0...15 */
3434                         __le32 log_cw_min;
3435
3436                         /* Adaptive interframe spacing in units of 32us */
3437                         __u8 aifs;
3438
3439                         /* TX queue to configure */
3440                         __u8 txq;
3441                 } ap;
3442                 struct {
3443                         /* Log exponent of max contention period: 0...15 */
3444                         __u8 log_cw_max;
3445
3446                         /* Log exponent of min contention period: 0...15 */
3447                         __u8 log_cw_min;
3448
3449                         /* Adaptive interframe spacing in units of 32us */
3450                         __u8 aifs;
3451
3452                         /* TX queue to configure */
3453                         __u8 txq;
3454                 } sta;
3455         };
3456 } __packed;
3457
3458 #define MWL8K_SET_EDCA_CW       0x01
3459 #define MWL8K_SET_EDCA_TXOP     0x02
3460 #define MWL8K_SET_EDCA_AIFS     0x04
3461
3462 #define MWL8K_SET_EDCA_ALL      (MWL8K_SET_EDCA_CW | \
3463                                  MWL8K_SET_EDCA_TXOP | \
3464                                  MWL8K_SET_EDCA_AIFS)
3465
3466 static int
3467 mwl8k_cmd_set_edca_params(struct ieee80211_hw *hw, __u8 qnum,
3468                           __u16 cw_min, __u16 cw_max,
3469                           __u8 aifs, __u16 txop)
3470 {
3471         struct mwl8k_priv *priv = hw->priv;
3472         struct mwl8k_cmd_set_edca_params *cmd;
3473         int rc;
3474
3475         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3476         if (cmd == NULL)
3477                 return -ENOMEM;
3478
3479         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_EDCA_PARAMS);
3480         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3481         cmd->action = cpu_to_le16(MWL8K_SET_EDCA_ALL);
3482         cmd->txop = cpu_to_le16(txop);
3483         if (priv->ap_fw) {
3484                 cmd->ap.log_cw_max = cpu_to_le32(ilog2(cw_max + 1));
3485                 cmd->ap.log_cw_min = cpu_to_le32(ilog2(cw_min + 1));
3486                 cmd->ap.aifs = aifs;
3487                 cmd->ap.txq = qnum;
3488         } else {
3489                 cmd->sta.log_cw_max = (u8)ilog2(cw_max + 1);
3490                 cmd->sta.log_cw_min = (u8)ilog2(cw_min + 1);
3491                 cmd->sta.aifs = aifs;
3492                 cmd->sta.txq = qnum;
3493         }
3494
3495         rc = mwl8k_post_cmd(hw, &cmd->header);
3496         kfree(cmd);
3497
3498         return rc;
3499 }
3500
3501 /*
3502  * CMD_SET_WMM_MODE.
3503  */
3504 struct mwl8k_cmd_set_wmm_mode {
3505         struct mwl8k_cmd_pkt header;
3506         __le16 action;
3507 } __packed;
3508
3509 static int mwl8k_cmd_set_wmm_mode(struct ieee80211_hw *hw, bool enable)
3510 {
3511         struct mwl8k_priv *priv = hw->priv;
3512         struct mwl8k_cmd_set_wmm_mode *cmd;
3513         int rc;
3514
3515         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3516         if (cmd == NULL)
3517                 return -ENOMEM;
3518
3519         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_WMM_MODE);
3520         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3521         cmd->action = cpu_to_le16(!!enable);
3522
3523         rc = mwl8k_post_cmd(hw, &cmd->header);
3524         kfree(cmd);
3525
3526         if (!rc)
3527                 priv->wmm_enabled = enable;
3528
3529         return rc;
3530 }
3531
3532 /*
3533  * CMD_MIMO_CONFIG.
3534  */
3535 struct mwl8k_cmd_mimo_config {
3536         struct mwl8k_cmd_pkt header;
3537         __le32 action;
3538         __u8 rx_antenna_map;
3539         __u8 tx_antenna_map;
3540 } __packed;
3541
3542 static int mwl8k_cmd_mimo_config(struct ieee80211_hw *hw, __u8 rx, __u8 tx)
3543 {
3544         struct mwl8k_cmd_mimo_config *cmd;
3545         int rc;
3546
3547         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3548         if (cmd == NULL)
3549                 return -ENOMEM;
3550
3551         cmd->header.code = cpu_to_le16(MWL8K_CMD_MIMO_CONFIG);
3552         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3553         cmd->action = cpu_to_le32((u32)MWL8K_CMD_SET);
3554         cmd->rx_antenna_map = rx;
3555         cmd->tx_antenna_map = tx;
3556
3557         rc = mwl8k_post_cmd(hw, &cmd->header);
3558         kfree(cmd);
3559
3560         return rc;
3561 }
3562
3563 /*
3564  * CMD_USE_FIXED_RATE (STA version).
3565  */
3566 struct mwl8k_cmd_use_fixed_rate_sta {
3567         struct mwl8k_cmd_pkt header;
3568         __le32 action;
3569         __le32 allow_rate_drop;
3570         __le32 num_rates;
3571         struct {
3572                 __le32 is_ht_rate;
3573                 __le32 enable_retry;
3574                 __le32 rate;
3575                 __le32 retry_count;
3576         } rate_entry[8];
3577         __le32 rate_type;
3578         __le32 reserved1;
3579         __le32 reserved2;
3580 } __packed;
3581
3582 #define MWL8K_USE_AUTO_RATE     0x0002
3583 #define MWL8K_UCAST_RATE        0
3584
3585 static int mwl8k_cmd_use_fixed_rate_sta(struct ieee80211_hw *hw)
3586 {
3587         struct mwl8k_cmd_use_fixed_rate_sta *cmd;
3588         int rc;
3589
3590         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3591         if (cmd == NULL)
3592                 return -ENOMEM;
3593
3594         cmd->header.code = cpu_to_le16(MWL8K_CMD_USE_FIXED_RATE);
3595         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3596         cmd->action = cpu_to_le32(MWL8K_USE_AUTO_RATE);
3597         cmd->rate_type = cpu_to_le32(MWL8K_UCAST_RATE);
3598
3599         rc = mwl8k_post_cmd(hw, &cmd->header);
3600         kfree(cmd);
3601
3602         return rc;
3603 }
3604
3605 /*
3606  * CMD_USE_FIXED_RATE (AP version).
3607  */
3608 struct mwl8k_cmd_use_fixed_rate_ap {
3609         struct mwl8k_cmd_pkt header;
3610         __le32 action;
3611         __le32 allow_rate_drop;
3612         __le32 num_rates;
3613         struct mwl8k_rate_entry_ap {
3614                 __le32 is_ht_rate;
3615                 __le32 enable_retry;
3616                 __le32 rate;
3617                 __le32 retry_count;
3618         } rate_entry[4];
3619         u8 multicast_rate;
3620         u8 multicast_rate_type;
3621         u8 management_rate;
3622 } __packed;
3623
3624 static int
3625 mwl8k_cmd_use_fixed_rate_ap(struct ieee80211_hw *hw, int mcast, int mgmt)
3626 {
3627         struct mwl8k_cmd_use_fixed_rate_ap *cmd;
3628         int rc;
3629
3630         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3631         if (cmd == NULL)
3632                 return -ENOMEM;
3633
3634         cmd->header.code = cpu_to_le16(MWL8K_CMD_USE_FIXED_RATE);
3635         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3636         cmd->action = cpu_to_le32(MWL8K_USE_AUTO_RATE);
3637         cmd->multicast_rate = mcast;
3638         cmd->management_rate = mgmt;
3639
3640         rc = mwl8k_post_cmd(hw, &cmd->header);
3641         kfree(cmd);
3642
3643         return rc;
3644 }
3645
3646 /*
3647  * CMD_ENABLE_SNIFFER.
3648  */
3649 struct mwl8k_cmd_enable_sniffer {
3650         struct mwl8k_cmd_pkt header;
3651         __le32 action;
3652 } __packed;
3653
3654 static int mwl8k_cmd_enable_sniffer(struct ieee80211_hw *hw, bool enable)
3655 {
3656         struct mwl8k_cmd_enable_sniffer *cmd;
3657         int rc;
3658
3659         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3660         if (cmd == NULL)
3661                 return -ENOMEM;
3662
3663         cmd->header.code = cpu_to_le16(MWL8K_CMD_ENABLE_SNIFFER);
3664         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3665         cmd->action = cpu_to_le32(!!enable);
3666
3667         rc = mwl8k_post_cmd(hw, &cmd->header);
3668         kfree(cmd);
3669
3670         return rc;
3671 }
3672
3673 struct mwl8k_cmd_update_mac_addr {
3674         struct mwl8k_cmd_pkt header;
3675         union {
3676                 struct {
3677                         __le16 mac_type;
3678                         __u8 mac_addr[ETH_ALEN];
3679                 } mbss;
3680                 __u8 mac_addr[ETH_ALEN];
3681         };
3682 } __packed;
3683
3684 #define MWL8K_MAC_TYPE_PRIMARY_CLIENT           0
3685 #define MWL8K_MAC_TYPE_SECONDARY_CLIENT         1
3686 #define MWL8K_MAC_TYPE_PRIMARY_AP               2
3687 #define MWL8K_MAC_TYPE_SECONDARY_AP             3
3688
3689 static int mwl8k_cmd_update_mac_addr(struct ieee80211_hw *hw,
3690                                   struct ieee80211_vif *vif, u8 *mac, bool set)
3691 {
3692         struct mwl8k_priv *priv = hw->priv;
3693         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
3694         struct mwl8k_cmd_update_mac_addr *cmd;
3695         int mac_type;
3696         int rc;
3697
3698         mac_type = MWL8K_MAC_TYPE_PRIMARY_AP;
3699         if (vif != NULL && vif->type == NL80211_IFTYPE_STATION) {
3700                 if (mwl8k_vif->macid + 1 == ffs(priv->sta_macids_supported))
3701                         if (priv->ap_fw)
3702                                 mac_type = MWL8K_MAC_TYPE_SECONDARY_CLIENT;
3703                         else
3704                                 mac_type = MWL8K_MAC_TYPE_PRIMARY_CLIENT;
3705                 else
3706                         mac_type = MWL8K_MAC_TYPE_SECONDARY_CLIENT;
3707         } else if (vif != NULL && vif->type == NL80211_IFTYPE_AP) {
3708                 if (mwl8k_vif->macid + 1 == ffs(priv->ap_macids_supported))
3709                         mac_type = MWL8K_MAC_TYPE_PRIMARY_AP;
3710                 else
3711                         mac_type = MWL8K_MAC_TYPE_SECONDARY_AP;
3712         }
3713
3714         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3715         if (cmd == NULL)
3716                 return -ENOMEM;
3717
3718         if (set)
3719                 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_MAC_ADDR);
3720         else
3721                 cmd->header.code = cpu_to_le16(MWL8K_CMD_DEL_MAC_ADDR);
3722
3723         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3724         if (priv->ap_fw) {
3725                 cmd->mbss.mac_type = cpu_to_le16(mac_type);
3726                 memcpy(cmd->mbss.mac_addr, mac, ETH_ALEN);
3727         } else {
3728                 memcpy(cmd->mac_addr, mac, ETH_ALEN);
3729         }
3730
3731         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3732         kfree(cmd);
3733
3734         return rc;
3735 }
3736
3737 /*
3738  * MWL8K_CMD_SET_MAC_ADDR.
3739  */
3740 static inline int mwl8k_cmd_set_mac_addr(struct ieee80211_hw *hw,
3741                                   struct ieee80211_vif *vif, u8 *mac)
3742 {
3743         return mwl8k_cmd_update_mac_addr(hw, vif, mac, true);
3744 }
3745
3746 /*
3747  * MWL8K_CMD_DEL_MAC_ADDR.
3748  */
3749 static inline int mwl8k_cmd_del_mac_addr(struct ieee80211_hw *hw,
3750                                   struct ieee80211_vif *vif, u8 *mac)
3751 {
3752         return mwl8k_cmd_update_mac_addr(hw, vif, mac, false);
3753 }
3754
3755 /*
3756  * CMD_SET_RATEADAPT_MODE.
3757  */
3758 struct mwl8k_cmd_set_rate_adapt_mode {
3759         struct mwl8k_cmd_pkt header;
3760         __le16 action;
3761         __le16 mode;
3762 } __packed;
3763
3764 static int mwl8k_cmd_set_rateadapt_mode(struct ieee80211_hw *hw, __u16 mode)
3765 {
3766         struct mwl8k_cmd_set_rate_adapt_mode *cmd;
3767         int rc;
3768
3769         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3770         if (cmd == NULL)
3771                 return -ENOMEM;
3772
3773         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATEADAPT_MODE);
3774         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3775         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3776         cmd->mode = cpu_to_le16(mode);
3777
3778         rc = mwl8k_post_cmd(hw, &cmd->header);
3779         kfree(cmd);
3780
3781         return rc;
3782 }
3783
3784 /*
3785  * CMD_GET_WATCHDOG_BITMAP.
3786  */
3787 struct mwl8k_cmd_get_watchdog_bitmap {
3788         struct mwl8k_cmd_pkt header;
3789         u8      bitmap;
3790 } __packed;
3791
3792 static int mwl8k_cmd_get_watchdog_bitmap(struct ieee80211_hw *hw, u8 *bitmap)
3793 {
3794         struct mwl8k_cmd_get_watchdog_bitmap *cmd;
3795         int rc;
3796
3797         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3798         if (cmd == NULL)
3799                 return -ENOMEM;
3800
3801         cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_WATCHDOG_BITMAP);
3802         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3803
3804         rc = mwl8k_post_cmd(hw, &cmd->header);
3805         if (!rc)
3806                 *bitmap = cmd->bitmap;
3807
3808         kfree(cmd);
3809
3810         return rc;
3811 }
3812
3813 #define MWL8K_WMM_QUEUE_NUMBER  3
3814
3815 static void mwl8k_destroy_ba(struct ieee80211_hw *hw,
3816                              u8 idx);
3817
3818 static void mwl8k_watchdog_ba_events(struct work_struct *work)
3819 {
3820         int rc;
3821         u8 bitmap = 0, stream_index;
3822         struct mwl8k_ampdu_stream *streams;
3823         struct mwl8k_priv *priv =
3824                 container_of(work, struct mwl8k_priv, watchdog_ba_handle);
3825         struct ieee80211_hw *hw = priv->hw;
3826         int i;
3827         u32 status = 0;
3828
3829         mwl8k_fw_lock(hw);
3830
3831         rc = mwl8k_cmd_get_watchdog_bitmap(priv->hw, &bitmap);
3832         if (rc)
3833                 goto done;
3834
3835         spin_lock(&priv->stream_lock);
3836
3837         /* the bitmap is the hw queue number.  Map it to the ampdu queue. */
3838         for (i = 0; i < TOTAL_HW_TX_QUEUES; i++) {
3839                 if (bitmap & (1 << i)) {
3840                         stream_index = (i + MWL8K_WMM_QUEUE_NUMBER) %
3841                                        TOTAL_HW_TX_QUEUES;
3842                         streams = &priv->ampdu[stream_index];
3843                         if (streams->state == AMPDU_STREAM_ACTIVE) {
3844                                 ieee80211_stop_tx_ba_session(streams->sta,
3845                                                              streams->tid);
3846                                 spin_unlock(&priv->stream_lock);
3847                                 mwl8k_destroy_ba(hw, stream_index);
3848                                 spin_lock(&priv->stream_lock);
3849                         }
3850                 }
3851         }
3852
3853         spin_unlock(&priv->stream_lock);
3854 done:
3855         atomic_dec(&priv->watchdog_event_pending);
3856         status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
3857         iowrite32((status | MWL8K_A2H_INT_BA_WATCHDOG),
3858                   priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
3859         mwl8k_fw_unlock(hw);
3860         return;
3861 }
3862
3863
3864 /*
3865  * CMD_BSS_START.
3866  */
3867 struct mwl8k_cmd_bss_start {
3868         struct mwl8k_cmd_pkt header;
3869         __le32 enable;
3870 } __packed;
3871
3872 static int mwl8k_cmd_bss_start(struct ieee80211_hw *hw,
3873                                struct ieee80211_vif *vif, int enable)
3874 {
3875         struct mwl8k_cmd_bss_start *cmd;
3876         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
3877         struct mwl8k_priv *priv = hw->priv;
3878         int rc;
3879
3880         if (enable && (priv->running_bsses & (1 << mwl8k_vif->macid)))
3881                 return 0;
3882
3883         if (!enable && !(priv->running_bsses & (1 << mwl8k_vif->macid)))
3884                 return 0;
3885
3886         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3887         if (cmd == NULL)
3888                 return -ENOMEM;
3889
3890         cmd->header.code = cpu_to_le16(MWL8K_CMD_BSS_START);
3891         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3892         cmd->enable = cpu_to_le32(enable);
3893
3894         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3895         kfree(cmd);
3896
3897         if (!rc) {
3898                 if (enable)
3899                         priv->running_bsses |= (1 << mwl8k_vif->macid);
3900                 else
3901                         priv->running_bsses &= ~(1 << mwl8k_vif->macid);
3902         }
3903         return rc;
3904 }
3905
3906 static void mwl8k_enable_bsses(struct ieee80211_hw *hw, bool enable, u32 bitmap)
3907 {
3908         struct mwl8k_priv *priv = hw->priv;
3909         struct mwl8k_vif *mwl8k_vif, *tmp_vif;
3910         struct ieee80211_vif *vif;
3911
3912         list_for_each_entry_safe(mwl8k_vif, tmp_vif, &priv->vif_list, list) {
3913                 vif = mwl8k_vif->vif;
3914
3915                 if (!(bitmap & (1 << mwl8k_vif->macid)))
3916                         continue;
3917
3918                 if (vif->type == NL80211_IFTYPE_AP)
3919                         mwl8k_cmd_bss_start(hw, vif, enable);
3920         }
3921 }
3922 /*
3923  * CMD_BASTREAM.
3924  */
3925
3926 /*
3927  * UPSTREAM is tx direction
3928  */
3929 #define BASTREAM_FLAG_DIRECTION_UPSTREAM        0x00
3930 #define BASTREAM_FLAG_IMMEDIATE_TYPE            0x01
3931
3932 enum ba_stream_action_type {
3933         MWL8K_BA_CREATE,
3934         MWL8K_BA_UPDATE,
3935         MWL8K_BA_DESTROY,
3936         MWL8K_BA_FLUSH,
3937         MWL8K_BA_CHECK,
3938 };
3939
3940
3941 struct mwl8k_create_ba_stream {
3942         __le32  flags;
3943         __le32  idle_thrs;
3944         __le32  bar_thrs;
3945         __le32  window_size;
3946         u8      peer_mac_addr[6];
3947         u8      dialog_token;
3948         u8      tid;
3949         u8      queue_id;
3950         u8      param_info;
3951         __le32  ba_context;
3952         u8      reset_seq_no_flag;
3953         __le16  curr_seq_no;
3954         u8      sta_src_mac_addr[6];
3955 } __packed;
3956
3957 struct mwl8k_destroy_ba_stream {
3958         __le32  flags;
3959         __le32  ba_context;
3960 } __packed;
3961
3962 struct mwl8k_cmd_bastream {
3963         struct mwl8k_cmd_pkt    header;
3964         __le32  action;
3965         union {
3966                 struct mwl8k_create_ba_stream   create_params;
3967                 struct mwl8k_destroy_ba_stream  destroy_params;
3968         };
3969 } __packed;
3970
3971 static int
3972 mwl8k_check_ba(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream,
3973                struct ieee80211_vif *vif)
3974 {
3975         struct mwl8k_cmd_bastream *cmd;
3976         int rc;
3977
3978         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3979         if (cmd == NULL)
3980                 return -ENOMEM;
3981
3982         cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
3983         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3984
3985         cmd->action = cpu_to_le32(MWL8K_BA_CHECK);
3986
3987         cmd->create_params.queue_id = stream->idx;
3988         memcpy(&cmd->create_params.peer_mac_addr[0], stream->sta->addr,
3989                ETH_ALEN);
3990         cmd->create_params.tid = stream->tid;
3991
3992         cmd->create_params.flags =
3993                 cpu_to_le32(BASTREAM_FLAG_IMMEDIATE_TYPE) |
3994                 cpu_to_le32(BASTREAM_FLAG_DIRECTION_UPSTREAM);
3995
3996         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3997
3998         kfree(cmd);
3999
4000         return rc;
4001 }
4002
4003 static int
4004 mwl8k_create_ba(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream,
4005                 u8 buf_size, struct ieee80211_vif *vif)
4006 {
4007         struct mwl8k_cmd_bastream *cmd;
4008         int rc;
4009
4010         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4011         if (cmd == NULL)
4012                 return -ENOMEM;
4013
4014
4015         cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
4016         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4017
4018         cmd->action = cpu_to_le32(MWL8K_BA_CREATE);
4019
4020         cmd->create_params.bar_thrs = cpu_to_le32((u32)buf_size);
4021         cmd->create_params.window_size = cpu_to_le32((u32)buf_size);
4022         cmd->create_params.queue_id = stream->idx;
4023
4024         memcpy(cmd->create_params.peer_mac_addr, stream->sta->addr, ETH_ALEN);
4025         cmd->create_params.tid = stream->tid;
4026         cmd->create_params.curr_seq_no = cpu_to_le16(0);
4027         cmd->create_params.reset_seq_no_flag = 1;
4028
4029         cmd->create_params.param_info =
4030                 (stream->sta->ht_cap.ampdu_factor &
4031                  IEEE80211_HT_AMPDU_PARM_FACTOR) |
4032                 ((stream->sta->ht_cap.ampdu_density << 2) &
4033                  IEEE80211_HT_AMPDU_PARM_DENSITY);
4034
4035         cmd->create_params.flags =
4036                 cpu_to_le32(BASTREAM_FLAG_IMMEDIATE_TYPE |
4037                                         BASTREAM_FLAG_DIRECTION_UPSTREAM);
4038
4039         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4040
4041         wiphy_debug(hw->wiphy, "Created a BA stream for %pM : tid %d\n",
4042                 stream->sta->addr, stream->tid);
4043         kfree(cmd);
4044
4045         return rc;
4046 }
4047
4048 static void mwl8k_destroy_ba(struct ieee80211_hw *hw,
4049                              u8 idx)
4050 {
4051         struct mwl8k_cmd_bastream *cmd;
4052
4053         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4054         if (cmd == NULL)
4055                 return;
4056
4057         cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
4058         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4059         cmd->action = cpu_to_le32(MWL8K_BA_DESTROY);
4060
4061         cmd->destroy_params.ba_context = cpu_to_le32(idx);
4062         mwl8k_post_cmd(hw, &cmd->header);
4063
4064         wiphy_debug(hw->wiphy, "Deleted BA stream index %d\n", idx);
4065
4066         kfree(cmd);
4067 }
4068
4069 /*
4070  * CMD_SET_NEW_STN.
4071  */
4072 struct mwl8k_cmd_set_new_stn {
4073         struct mwl8k_cmd_pkt header;
4074         __le16 aid;
4075         __u8 mac_addr[6];
4076         __le16 stn_id;
4077         __le16 action;
4078         __le16 rsvd;
4079         __le32 legacy_rates;
4080         __u8 ht_rates[4];
4081         __le16 cap_info;
4082         __le16 ht_capabilities_info;
4083         __u8 mac_ht_param_info;
4084         __u8 rev;
4085         __u8 control_channel;
4086         __u8 add_channel;
4087         __le16 op_mode;
4088         __le16 stbc;
4089         __u8 add_qos_info;
4090         __u8 is_qos_sta;
4091         __le32 fw_sta_ptr;
4092 } __packed;
4093
4094 #define MWL8K_STA_ACTION_ADD            0
4095 #define MWL8K_STA_ACTION_REMOVE         2
4096
4097 static int mwl8k_cmd_set_new_stn_add(struct ieee80211_hw *hw,
4098                                      struct ieee80211_vif *vif,
4099                                      struct ieee80211_sta *sta)
4100 {
4101         struct mwl8k_cmd_set_new_stn *cmd;
4102         u32 rates;
4103         int rc;
4104
4105         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4106         if (cmd == NULL)
4107                 return -ENOMEM;
4108
4109         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4110         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4111         cmd->aid = cpu_to_le16(sta->aid);
4112         memcpy(cmd->mac_addr, sta->addr, ETH_ALEN);
4113         cmd->stn_id = cpu_to_le16(sta->aid);
4114         cmd->action = cpu_to_le16(MWL8K_STA_ACTION_ADD);
4115         if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ)
4116                 rates = sta->supp_rates[NL80211_BAND_2GHZ];
4117         else
4118                 rates = sta->supp_rates[NL80211_BAND_5GHZ] << 5;
4119         cmd->legacy_rates = cpu_to_le32(rates);
4120         if (sta->ht_cap.ht_supported) {
4121                 cmd->ht_rates[0] = sta->ht_cap.mcs.rx_mask[0];
4122                 cmd->ht_rates[1] = sta->ht_cap.mcs.rx_mask[1];
4123                 cmd->ht_rates[2] = sta->ht_cap.mcs.rx_mask[2];
4124                 cmd->ht_rates[3] = sta->ht_cap.mcs.rx_mask[3];
4125                 cmd->ht_capabilities_info = cpu_to_le16(sta->ht_cap.cap);
4126                 cmd->mac_ht_param_info = (sta->ht_cap.ampdu_factor & 3) |
4127                         ((sta->ht_cap.ampdu_density & 7) << 2);
4128                 cmd->is_qos_sta = 1;
4129         }
4130
4131         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4132         kfree(cmd);
4133
4134         return rc;
4135 }
4136
4137 static int mwl8k_cmd_set_new_stn_add_self(struct ieee80211_hw *hw,
4138                                           struct ieee80211_vif *vif)
4139 {
4140         struct mwl8k_cmd_set_new_stn *cmd;
4141         int rc;
4142
4143         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4144         if (cmd == NULL)
4145                 return -ENOMEM;
4146
4147         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4148         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4149         memcpy(cmd->mac_addr, vif->addr, ETH_ALEN);
4150
4151         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4152         kfree(cmd);
4153
4154         return rc;
4155 }
4156
4157 static int mwl8k_cmd_set_new_stn_del(struct ieee80211_hw *hw,
4158                                      struct ieee80211_vif *vif, u8 *addr)
4159 {
4160         struct mwl8k_cmd_set_new_stn *cmd;
4161         struct mwl8k_priv *priv = hw->priv;
4162         int rc, i;
4163         u8 idx;
4164
4165         spin_lock(&priv->stream_lock);
4166         /* Destroy any active ampdu streams for this sta */
4167         for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
4168                 struct mwl8k_ampdu_stream *s;
4169                 s = &priv->ampdu[i];
4170                 if (s->state != AMPDU_NO_STREAM) {
4171                         if (memcmp(s->sta->addr, addr, ETH_ALEN) == 0) {
4172                                 if (s->state == AMPDU_STREAM_ACTIVE) {
4173                                         idx = s->idx;
4174                                         spin_unlock(&priv->stream_lock);
4175                                         mwl8k_destroy_ba(hw, idx);
4176                                         spin_lock(&priv->stream_lock);
4177                                 } else if (s->state == AMPDU_STREAM_NEW) {
4178                                         mwl8k_remove_stream(hw, s);
4179                                 }
4180                         }
4181                 }
4182         }
4183
4184         spin_unlock(&priv->stream_lock);
4185
4186         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4187         if (cmd == NULL)
4188                 return -ENOMEM;
4189
4190         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4191         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4192         memcpy(cmd->mac_addr, addr, ETH_ALEN);
4193         cmd->action = cpu_to_le16(MWL8K_STA_ACTION_REMOVE);
4194
4195         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4196         kfree(cmd);
4197
4198         return rc;
4199 }
4200
4201 /*
4202  * CMD_UPDATE_ENCRYPTION.
4203  */
4204
4205 #define MAX_ENCR_KEY_LENGTH     16
4206 #define MIC_KEY_LENGTH          8
4207
4208 struct mwl8k_cmd_update_encryption {
4209         struct mwl8k_cmd_pkt header;
4210
4211         __le32 action;
4212         __le32 reserved;
4213         __u8 mac_addr[6];
4214         __u8 encr_type;
4215
4216 } __packed;
4217
4218 struct mwl8k_cmd_set_key {
4219         struct mwl8k_cmd_pkt header;
4220
4221         __le32 action;
4222         __le32 reserved;
4223         __le16 length;
4224         __le16 key_type_id;
4225         __le32 key_info;
4226         __le32 key_id;
4227         __le16 key_len;
4228         __u8 key_material[MAX_ENCR_KEY_LENGTH];
4229         __u8 tkip_tx_mic_key[MIC_KEY_LENGTH];
4230         __u8 tkip_rx_mic_key[MIC_KEY_LENGTH];
4231         __le16 tkip_rsc_low;
4232         __le32 tkip_rsc_high;
4233         __le16 tkip_tsc_low;
4234         __le32 tkip_tsc_high;
4235         __u8 mac_addr[6];
4236 } __packed;
4237
4238 enum {
4239         MWL8K_ENCR_ENABLE,
4240         MWL8K_ENCR_SET_KEY,
4241         MWL8K_ENCR_REMOVE_KEY,
4242         MWL8K_ENCR_SET_GROUP_KEY,
4243 };
4244
4245 #define MWL8K_UPDATE_ENCRYPTION_TYPE_WEP        0
4246 #define MWL8K_UPDATE_ENCRYPTION_TYPE_DISABLE    1
4247 #define MWL8K_UPDATE_ENCRYPTION_TYPE_TKIP       4
4248 #define MWL8K_UPDATE_ENCRYPTION_TYPE_MIXED      7
4249 #define MWL8K_UPDATE_ENCRYPTION_TYPE_AES        8
4250
4251 enum {
4252         MWL8K_ALG_WEP,
4253         MWL8K_ALG_TKIP,
4254         MWL8K_ALG_CCMP,
4255 };
4256
4257 #define MWL8K_KEY_FLAG_TXGROUPKEY       0x00000004
4258 #define MWL8K_KEY_FLAG_PAIRWISE         0x00000008
4259 #define MWL8K_KEY_FLAG_TSC_VALID        0x00000040
4260 #define MWL8K_KEY_FLAG_WEP_TXKEY        0x01000000
4261 #define MWL8K_KEY_FLAG_MICKEY_VALID     0x02000000
4262
4263 static int mwl8k_cmd_update_encryption_enable(struct ieee80211_hw *hw,
4264                                               struct ieee80211_vif *vif,
4265                                               u8 *addr,
4266                                               u8 encr_type)
4267 {
4268         struct mwl8k_cmd_update_encryption *cmd;
4269         int rc;
4270
4271         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4272         if (cmd == NULL)
4273                 return -ENOMEM;
4274
4275         cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_ENCRYPTION);
4276         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4277         cmd->action = cpu_to_le32(MWL8K_ENCR_ENABLE);
4278         memcpy(cmd->mac_addr, addr, ETH_ALEN);
4279         cmd->encr_type = encr_type;
4280
4281         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4282         kfree(cmd);
4283
4284         return rc;
4285 }
4286
4287 static int mwl8k_encryption_set_cmd_info(struct mwl8k_cmd_set_key *cmd,
4288                                                 u8 *addr,
4289                                                 struct ieee80211_key_conf *key)
4290 {
4291         cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_ENCRYPTION);
4292         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4293         cmd->length = cpu_to_le16(sizeof(*cmd) -
4294                                 offsetof(struct mwl8k_cmd_set_key, length));
4295         cmd->key_id = cpu_to_le32(key->keyidx);
4296         cmd->key_len = cpu_to_le16(key->keylen);
4297         memcpy(cmd->mac_addr, addr, ETH_ALEN);
4298
4299         switch (key->cipher) {
4300         case WLAN_CIPHER_SUITE_WEP40:
4301         case WLAN_CIPHER_SUITE_WEP104:
4302                 cmd->key_type_id = cpu_to_le16(MWL8K_ALG_WEP);
4303                 if (key->keyidx == 0)
4304                         cmd->key_info = cpu_to_le32(MWL8K_KEY_FLAG_WEP_TXKEY);
4305
4306                 break;
4307         case WLAN_CIPHER_SUITE_TKIP:
4308                 cmd->key_type_id = cpu_to_le16(MWL8K_ALG_TKIP);
4309                 cmd->key_info = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4310                         ? cpu_to_le32(MWL8K_KEY_FLAG_PAIRWISE)
4311                         : cpu_to_le32(MWL8K_KEY_FLAG_TXGROUPKEY);
4312                 cmd->key_info |= cpu_to_le32(MWL8K_KEY_FLAG_MICKEY_VALID
4313                                                 | MWL8K_KEY_FLAG_TSC_VALID);
4314                 break;
4315         case WLAN_CIPHER_SUITE_CCMP:
4316                 cmd->key_type_id = cpu_to_le16(MWL8K_ALG_CCMP);
4317                 cmd->key_info = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4318                         ? cpu_to_le32(MWL8K_KEY_FLAG_PAIRWISE)
4319                         : cpu_to_le32(MWL8K_KEY_FLAG_TXGROUPKEY);
4320                 break;
4321         default:
4322                 return -ENOTSUPP;
4323         }
4324
4325         return 0;
4326 }
4327
4328 static int mwl8k_cmd_encryption_set_key(struct ieee80211_hw *hw,
4329                                                 struct ieee80211_vif *vif,
4330                                                 u8 *addr,
4331                                                 struct ieee80211_key_conf *key)
4332 {
4333         struct mwl8k_cmd_set_key *cmd;
4334         int rc;
4335         int keymlen;
4336         u32 action;
4337         u8 idx;
4338         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4339
4340         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4341         if (cmd == NULL)
4342                 return -ENOMEM;
4343
4344         rc = mwl8k_encryption_set_cmd_info(cmd, addr, key);
4345         if (rc < 0)
4346                 goto done;
4347
4348         idx = key->keyidx;
4349
4350         if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4351                 action = MWL8K_ENCR_SET_KEY;
4352         else
4353                 action = MWL8K_ENCR_SET_GROUP_KEY;
4354
4355         switch (key->cipher) {
4356         case WLAN_CIPHER_SUITE_WEP40:
4357         case WLAN_CIPHER_SUITE_WEP104:
4358                 if (!mwl8k_vif->wep_key_conf[idx].enabled) {
4359                         memcpy(mwl8k_vif->wep_key_conf[idx].key, key,
4360                                                 sizeof(*key) + key->keylen);
4361                         mwl8k_vif->wep_key_conf[idx].enabled = 1;
4362                 }
4363
4364                 keymlen = key->keylen;
4365                 action = MWL8K_ENCR_SET_KEY;
4366                 break;
4367         case WLAN_CIPHER_SUITE_TKIP:
4368                 keymlen = MAX_ENCR_KEY_LENGTH + 2 * MIC_KEY_LENGTH;
4369                 break;
4370         case WLAN_CIPHER_SUITE_CCMP:
4371                 keymlen = key->keylen;
4372                 break;
4373         default:
4374                 rc = -ENOTSUPP;
4375                 goto done;
4376         }
4377
4378         memcpy(cmd->key_material, key->key, keymlen);
4379         cmd->action = cpu_to_le32(action);
4380
4381         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4382 done:
4383         kfree(cmd);
4384
4385         return rc;
4386 }
4387
4388 static int mwl8k_cmd_encryption_remove_key(struct ieee80211_hw *hw,
4389                                                 struct ieee80211_vif *vif,
4390                                                 u8 *addr,
4391                                                 struct ieee80211_key_conf *key)
4392 {
4393         struct mwl8k_cmd_set_key *cmd;
4394         int rc;
4395         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4396
4397         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4398         if (cmd == NULL)
4399                 return -ENOMEM;
4400
4401         rc = mwl8k_encryption_set_cmd_info(cmd, addr, key);
4402         if (rc < 0)
4403                 goto done;
4404
4405         if (key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
4406                         key->cipher == WLAN_CIPHER_SUITE_WEP104)
4407                 mwl8k_vif->wep_key_conf[key->keyidx].enabled = 0;
4408
4409         cmd->action = cpu_to_le32(MWL8K_ENCR_REMOVE_KEY);
4410
4411         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4412 done:
4413         kfree(cmd);
4414
4415         return rc;
4416 }
4417
4418 static int mwl8k_set_key(struct ieee80211_hw *hw,
4419                          enum set_key_cmd cmd_param,
4420                          struct ieee80211_vif *vif,
4421                          struct ieee80211_sta *sta,
4422                          struct ieee80211_key_conf *key)
4423 {
4424         int rc = 0;
4425         u8 encr_type;
4426         u8 *addr;
4427         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4428         struct mwl8k_priv *priv = hw->priv;
4429
4430         if (vif->type == NL80211_IFTYPE_STATION && !priv->ap_fw)
4431                 return -EOPNOTSUPP;
4432
4433         if (sta == NULL)
4434                 addr = vif->addr;
4435         else
4436                 addr = sta->addr;
4437
4438         if (cmd_param == SET_KEY) {
4439                 rc = mwl8k_cmd_encryption_set_key(hw, vif, addr, key);
4440                 if (rc)
4441                         goto out;
4442
4443                 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40)
4444                                 || (key->cipher == WLAN_CIPHER_SUITE_WEP104))
4445                         encr_type = MWL8K_UPDATE_ENCRYPTION_TYPE_WEP;
4446                 else
4447                         encr_type = MWL8K_UPDATE_ENCRYPTION_TYPE_MIXED;
4448
4449                 rc = mwl8k_cmd_update_encryption_enable(hw, vif, addr,
4450                                                                 encr_type);
4451                 if (rc)
4452                         goto out;
4453
4454                 mwl8k_vif->is_hw_crypto_enabled = true;
4455
4456         } else {
4457                 rc = mwl8k_cmd_encryption_remove_key(hw, vif, addr, key);
4458
4459                 if (rc)
4460                         goto out;
4461         }
4462 out:
4463         return rc;
4464 }
4465
4466 /*
4467  * CMD_UPDATE_STADB.
4468  */
4469 struct ewc_ht_info {
4470         __le16  control1;
4471         __le16  control2;
4472         __le16  control3;
4473 } __packed;
4474
4475 struct peer_capability_info {
4476         /* Peer type - AP vs. STA.  */
4477         __u8    peer_type;
4478
4479         /* Basic 802.11 capabilities from assoc resp.  */
4480         __le16  basic_caps;
4481
4482         /* Set if peer supports 802.11n high throughput (HT).  */
4483         __u8    ht_support;
4484
4485         /* Valid if HT is supported.  */
4486         __le16  ht_caps;
4487         __u8    extended_ht_caps;
4488         struct ewc_ht_info      ewc_info;
4489
4490         /* Legacy rate table. Intersection of our rates and peer rates.  */
4491         __u8    legacy_rates[12];
4492
4493         /* HT rate table. Intersection of our rates and peer rates.  */
4494         __u8    ht_rates[16];
4495         __u8    pad[16];
4496
4497         /* If set, interoperability mode, no proprietary extensions.  */
4498         __u8    interop;
4499         __u8    pad2;
4500         __u8    station_id;
4501         __le16  amsdu_enabled;
4502 } __packed;
4503
4504 struct mwl8k_cmd_update_stadb {
4505         struct mwl8k_cmd_pkt header;
4506
4507         /* See STADB_ACTION_TYPE */
4508         __le32  action;
4509
4510         /* Peer MAC address */
4511         __u8    peer_addr[ETH_ALEN];
4512
4513         __le32  reserved;
4514
4515         /* Peer info - valid during add/update.  */
4516         struct peer_capability_info     peer_info;
4517 } __packed;
4518
4519 #define MWL8K_STA_DB_MODIFY_ENTRY       1
4520 #define MWL8K_STA_DB_DEL_ENTRY          2
4521
4522 /* Peer Entry flags - used to define the type of the peer node */
4523 #define MWL8K_PEER_TYPE_ACCESSPOINT     2
4524
4525 static int mwl8k_cmd_update_stadb_add(struct ieee80211_hw *hw,
4526                                       struct ieee80211_vif *vif,
4527                                       struct ieee80211_sta *sta)
4528 {
4529         struct mwl8k_cmd_update_stadb *cmd;
4530         struct peer_capability_info *p;
4531         u32 rates;
4532         int rc;
4533
4534         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4535         if (cmd == NULL)
4536                 return -ENOMEM;
4537
4538         cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_STADB);
4539         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4540         cmd->action = cpu_to_le32(MWL8K_STA_DB_MODIFY_ENTRY);
4541         memcpy(cmd->peer_addr, sta->addr, ETH_ALEN);
4542
4543         p = &cmd->peer_info;
4544         p->peer_type = MWL8K_PEER_TYPE_ACCESSPOINT;
4545         p->basic_caps = cpu_to_le16(vif->bss_conf.assoc_capability);
4546         p->ht_support = sta->ht_cap.ht_supported;
4547         p->ht_caps = cpu_to_le16(sta->ht_cap.cap);
4548         p->extended_ht_caps = (sta->ht_cap.ampdu_factor & 3) |
4549                 ((sta->ht_cap.ampdu_density & 7) << 2);
4550         if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ)
4551                 rates = sta->supp_rates[NL80211_BAND_2GHZ];
4552         else
4553                 rates = sta->supp_rates[NL80211_BAND_5GHZ] << 5;
4554         legacy_rate_mask_to_array(p->legacy_rates, rates);
4555         memcpy(p->ht_rates, sta->ht_cap.mcs.rx_mask, 16);
4556         p->interop = 1;
4557         p->amsdu_enabled = 0;
4558
4559         rc = mwl8k_post_cmd(hw, &cmd->header);
4560         if (!rc)
4561                 rc = p->station_id;
4562         kfree(cmd);
4563
4564         return rc;
4565 }
4566
4567 static int mwl8k_cmd_update_stadb_del(struct ieee80211_hw *hw,
4568                                       struct ieee80211_vif *vif, u8 *addr)
4569 {
4570         struct mwl8k_cmd_update_stadb *cmd;
4571         int rc;
4572
4573         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4574         if (cmd == NULL)
4575                 return -ENOMEM;
4576
4577         cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_STADB);
4578         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4579         cmd->action = cpu_to_le32(MWL8K_STA_DB_DEL_ENTRY);
4580         memcpy(cmd->peer_addr, addr, ETH_ALEN);
4581
4582         rc = mwl8k_post_cmd(hw, &cmd->header);
4583         kfree(cmd);
4584
4585         return rc;
4586 }
4587
4588
4589 /*
4590  * Interrupt handling.
4591  */
4592 static irqreturn_t mwl8k_interrupt(int irq, void *dev_id)
4593 {
4594         struct ieee80211_hw *hw = dev_id;
4595         struct mwl8k_priv *priv = hw->priv;
4596         u32 status;
4597
4598         status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4599         if (!status)
4600                 return IRQ_NONE;
4601
4602         if (status & MWL8K_A2H_INT_TX_DONE) {
4603                 status &= ~MWL8K_A2H_INT_TX_DONE;
4604                 tasklet_schedule(&priv->poll_tx_task);
4605         }
4606
4607         if (status & MWL8K_A2H_INT_RX_READY) {
4608                 status &= ~MWL8K_A2H_INT_RX_READY;
4609                 tasklet_schedule(&priv->poll_rx_task);
4610         }
4611
4612         if (status & MWL8K_A2H_INT_BA_WATCHDOG) {
4613                 iowrite32(~MWL8K_A2H_INT_BA_WATCHDOG,
4614                           priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
4615
4616                 atomic_inc(&priv->watchdog_event_pending);
4617                 status &= ~MWL8K_A2H_INT_BA_WATCHDOG;
4618                 ieee80211_queue_work(hw, &priv->watchdog_ba_handle);
4619         }
4620
4621         if (status)
4622                 iowrite32(~status, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4623
4624         if (status & MWL8K_A2H_INT_OPC_DONE) {
4625                 if (priv->hostcmd_wait != NULL)
4626                         complete(priv->hostcmd_wait);
4627         }
4628
4629         if (status & MWL8K_A2H_INT_QUEUE_EMPTY) {
4630                 if (!mutex_is_locked(&priv->fw_mutex) &&
4631                     priv->radio_on && priv->pending_tx_pkts)
4632                         mwl8k_tx_start(priv);
4633         }
4634
4635         return IRQ_HANDLED;
4636 }
4637
4638 static void mwl8k_tx_poll(struct tasklet_struct *t)
4639 {
4640         struct mwl8k_priv *priv = from_tasklet(priv, t, poll_tx_task);
4641         struct ieee80211_hw *hw = pci_get_drvdata(priv->pdev);
4642         int limit;
4643         int i;
4644
4645         limit = 32;
4646
4647         spin_lock(&priv->tx_lock);
4648
4649         for (i = 0; i < mwl8k_tx_queues(priv); i++)
4650                 limit -= mwl8k_txq_reclaim(hw, i, limit, 0);
4651
4652         if (!priv->pending_tx_pkts && priv->tx_wait != NULL) {
4653                 complete(priv->tx_wait);
4654                 priv->tx_wait = NULL;
4655         }
4656
4657         spin_unlock(&priv->tx_lock);
4658
4659         if (limit) {
4660                 writel(~MWL8K_A2H_INT_TX_DONE,
4661                        priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4662         } else {
4663                 tasklet_schedule(&priv->poll_tx_task);
4664         }
4665 }
4666
4667 static void mwl8k_rx_poll(struct tasklet_struct *t)
4668 {
4669         struct mwl8k_priv *priv = from_tasklet(priv, t, poll_rx_task);
4670         struct ieee80211_hw *hw = pci_get_drvdata(priv->pdev);
4671         int limit;
4672
4673         limit = 32;
4674         limit -= rxq_process(hw, 0, limit);
4675         limit -= rxq_refill(hw, 0, limit);
4676
4677         if (limit) {
4678                 writel(~MWL8K_A2H_INT_RX_READY,
4679                        priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4680         } else {
4681                 tasklet_schedule(&priv->poll_rx_task);
4682         }
4683 }
4684
4685
4686 /*
4687  * Core driver operations.
4688  */
4689 static void mwl8k_tx(struct ieee80211_hw *hw,
4690                      struct ieee80211_tx_control *control,
4691                      struct sk_buff *skb)
4692 {
4693         struct mwl8k_priv *priv = hw->priv;
4694         int index = skb_get_queue_mapping(skb);
4695
4696         if (!priv->radio_on) {
4697                 wiphy_debug(hw->wiphy,
4698                             "dropped TX frame since radio disabled\n");
4699                 dev_kfree_skb(skb);
4700                 return;
4701         }
4702
4703         mwl8k_txq_xmit(hw, index, control->sta, skb);
4704 }
4705
4706 static int mwl8k_start(struct ieee80211_hw *hw)
4707 {
4708         struct mwl8k_priv *priv = hw->priv;
4709         int rc;
4710
4711         rc = request_irq(priv->pdev->irq, mwl8k_interrupt,
4712                          IRQF_SHARED, MWL8K_NAME, hw);
4713         if (rc) {
4714                 priv->irq = -1;
4715                 wiphy_err(hw->wiphy, "failed to register IRQ handler\n");
4716                 return -EIO;
4717         }
4718         priv->irq = priv->pdev->irq;
4719
4720         /* Enable TX reclaim and RX tasklets.  */
4721         tasklet_enable(&priv->poll_tx_task);
4722         tasklet_enable(&priv->poll_rx_task);
4723
4724         /* Enable interrupts */
4725         iowrite32(MWL8K_A2H_EVENTS, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4726         iowrite32(MWL8K_A2H_EVENTS,
4727                   priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
4728
4729         rc = mwl8k_fw_lock(hw);
4730         if (!rc) {
4731                 rc = mwl8k_cmd_radio_enable(hw);
4732
4733                 if (!priv->ap_fw) {
4734                         if (!rc)
4735                                 rc = mwl8k_cmd_enable_sniffer(hw, 0);
4736
4737                         if (!rc)
4738                                 rc = mwl8k_cmd_set_pre_scan(hw);
4739
4740                         if (!rc)
4741                                 rc = mwl8k_cmd_set_post_scan(hw,
4742                                                 "\x00\x00\x00\x00\x00\x00");
4743                 }
4744
4745                 if (!rc)
4746                         rc = mwl8k_cmd_set_rateadapt_mode(hw, 0);
4747
4748                 if (!rc)
4749                         rc = mwl8k_cmd_set_wmm_mode(hw, 0);
4750
4751                 mwl8k_fw_unlock(hw);
4752         }
4753
4754         if (rc) {
4755                 iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4756                 free_irq(priv->pdev->irq, hw);
4757                 priv->irq = -1;
4758                 tasklet_disable(&priv->poll_tx_task);
4759                 tasklet_disable(&priv->poll_rx_task);
4760         } else {
4761                 ieee80211_wake_queues(hw);
4762         }
4763
4764         return rc;
4765 }
4766
4767 static void mwl8k_stop(struct ieee80211_hw *hw)
4768 {
4769         struct mwl8k_priv *priv = hw->priv;
4770         int i;
4771
4772         if (!priv->hw_restart_in_progress)
4773                 mwl8k_cmd_radio_disable(hw);
4774
4775         ieee80211_stop_queues(hw);
4776
4777         /* Disable interrupts */
4778         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4779         if (priv->irq != -1) {
4780                 free_irq(priv->pdev->irq, hw);
4781                 priv->irq = -1;
4782         }
4783
4784         /* Stop finalize join worker */
4785         cancel_work_sync(&priv->finalize_join_worker);
4786         cancel_work_sync(&priv->watchdog_ba_handle);
4787         if (priv->beacon_skb != NULL)
4788                 dev_kfree_skb(priv->beacon_skb);
4789
4790         /* Stop TX reclaim and RX tasklets.  */
4791         tasklet_disable(&priv->poll_tx_task);
4792         tasklet_disable(&priv->poll_rx_task);
4793
4794         /* Return all skbs to mac80211 */
4795         for (i = 0; i < mwl8k_tx_queues(priv); i++)
4796                 mwl8k_txq_reclaim(hw, i, INT_MAX, 1);
4797 }
4798
4799 static int mwl8k_reload_firmware(struct ieee80211_hw *hw, char *fw_image);
4800
4801 static int mwl8k_add_interface(struct ieee80211_hw *hw,
4802                                struct ieee80211_vif *vif)
4803 {
4804         struct mwl8k_priv *priv = hw->priv;
4805         struct mwl8k_vif *mwl8k_vif;
4806         u32 macids_supported;
4807         int macid, rc;
4808         struct mwl8k_device_info *di;
4809
4810         /*
4811          * Reject interface creation if sniffer mode is active, as
4812          * STA operation is mutually exclusive with hardware sniffer
4813          * mode.  (Sniffer mode is only used on STA firmware.)
4814          */
4815         if (priv->sniffer_enabled) {
4816                 wiphy_info(hw->wiphy,
4817                            "unable to create STA interface because sniffer mode is enabled\n");
4818                 return -EINVAL;
4819         }
4820
4821         di = priv->device_info;
4822         switch (vif->type) {
4823         case NL80211_IFTYPE_AP:
4824                 if (!priv->ap_fw && di->fw_image_ap) {
4825                         /* we must load the ap fw to meet this request */
4826                         if (!list_empty(&priv->vif_list))
4827                                 return -EBUSY;
4828                         rc = mwl8k_reload_firmware(hw, di->fw_image_ap);
4829                         if (rc)
4830                                 return rc;
4831                 }
4832                 macids_supported = priv->ap_macids_supported;
4833                 break;
4834         case NL80211_IFTYPE_STATION:
4835                 if (priv->ap_fw && di->fw_image_sta) {
4836                         if (!list_empty(&priv->vif_list)) {
4837                                 wiphy_warn(hw->wiphy, "AP interface is running.\n"
4838                                            "Adding STA interface for WDS");
4839                         } else {
4840                                 /* we must load the sta fw to
4841                                  * meet this request.
4842                                  */
4843                                 rc = mwl8k_reload_firmware(hw,
4844                                                            di->fw_image_sta);
4845                                 if (rc)
4846                                         return rc;
4847                         }
4848                 }
4849                 macids_supported = priv->sta_macids_supported;
4850                 break;
4851         default:
4852                 return -EINVAL;
4853         }
4854
4855         macid = ffs(macids_supported & ~priv->macids_used);
4856         if (!macid--)
4857                 return -EBUSY;
4858
4859         /* Setup driver private area. */
4860         mwl8k_vif = MWL8K_VIF(vif);
4861         memset(mwl8k_vif, 0, sizeof(*mwl8k_vif));
4862         mwl8k_vif->vif = vif;
4863         mwl8k_vif->macid = macid;
4864         mwl8k_vif->seqno = 0;
4865         memcpy(mwl8k_vif->bssid, vif->addr, ETH_ALEN);
4866         mwl8k_vif->is_hw_crypto_enabled = false;
4867
4868         /* Set the mac address.  */
4869         mwl8k_cmd_set_mac_addr(hw, vif, vif->addr);
4870
4871         if (vif->type == NL80211_IFTYPE_AP)
4872                 mwl8k_cmd_set_new_stn_add_self(hw, vif);
4873
4874         priv->macids_used |= 1 << mwl8k_vif->macid;
4875         list_add_tail(&mwl8k_vif->list, &priv->vif_list);
4876
4877         return 0;
4878 }
4879
4880 static void mwl8k_remove_vif(struct mwl8k_priv *priv, struct mwl8k_vif *vif)
4881 {
4882         /* Has ieee80211_restart_hw re-added the removed interfaces? */
4883         if (!priv->macids_used)
4884                 return;
4885
4886         priv->macids_used &= ~(1 << vif->macid);
4887         list_del(&vif->list);
4888 }
4889
4890 static void mwl8k_remove_interface(struct ieee80211_hw *hw,
4891                                    struct ieee80211_vif *vif)
4892 {
4893         struct mwl8k_priv *priv = hw->priv;
4894         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4895
4896         if (vif->type == NL80211_IFTYPE_AP)
4897                 mwl8k_cmd_set_new_stn_del(hw, vif, vif->addr);
4898
4899         mwl8k_cmd_del_mac_addr(hw, vif, vif->addr);
4900
4901         mwl8k_remove_vif(priv, mwl8k_vif);
4902 }
4903
4904 static void mwl8k_hw_restart_work(struct work_struct *work)
4905 {
4906         struct mwl8k_priv *priv =
4907                 container_of(work, struct mwl8k_priv, fw_reload);
4908         struct ieee80211_hw *hw = priv->hw;
4909         struct mwl8k_device_info *di;
4910         int rc;
4911
4912         /* If some command is waiting for a response, clear it */
4913         if (priv->hostcmd_wait != NULL) {
4914                 complete(priv->hostcmd_wait);
4915                 priv->hostcmd_wait = NULL;
4916         }
4917
4918         priv->hw_restart_owner = current;
4919         di = priv->device_info;
4920         mwl8k_fw_lock(hw);
4921
4922         if (priv->ap_fw)
4923                 rc = mwl8k_reload_firmware(hw, di->fw_image_ap);
4924         else
4925                 rc = mwl8k_reload_firmware(hw, di->fw_image_sta);
4926
4927         if (rc)
4928                 goto fail;
4929
4930         priv->hw_restart_owner = NULL;
4931         priv->hw_restart_in_progress = false;
4932
4933         /*
4934          * This unlock will wake up the queues and
4935          * also opens the command path for other
4936          * commands
4937          */
4938         mwl8k_fw_unlock(hw);
4939
4940         ieee80211_restart_hw(hw);
4941
4942         wiphy_err(hw->wiphy, "Firmware restarted successfully\n");
4943
4944         return;
4945 fail:
4946         mwl8k_fw_unlock(hw);
4947
4948         wiphy_err(hw->wiphy, "Firmware restart failed\n");
4949 }
4950
4951 static int mwl8k_config(struct ieee80211_hw *hw, u32 changed)
4952 {
4953         struct ieee80211_conf *conf = &hw->conf;
4954         struct mwl8k_priv *priv = hw->priv;
4955         int rc;
4956
4957         rc = mwl8k_fw_lock(hw);
4958         if (rc)
4959                 return rc;
4960
4961         if (conf->flags & IEEE80211_CONF_IDLE)
4962                 rc = mwl8k_cmd_radio_disable(hw);
4963         else
4964                 rc = mwl8k_cmd_radio_enable(hw);
4965         if (rc)
4966                 goto out;
4967
4968         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
4969                 rc = mwl8k_cmd_set_rf_channel(hw, conf);
4970                 if (rc)
4971                         goto out;
4972         }
4973
4974         if (conf->power_level > 18)
4975                 conf->power_level = 18;
4976
4977         if (priv->ap_fw) {
4978
4979                 if (conf->flags & IEEE80211_CONF_CHANGE_POWER) {
4980                         rc = mwl8k_cmd_tx_power(hw, conf, conf->power_level);
4981                         if (rc)
4982                                 goto out;
4983                 }
4984
4985
4986         } else {
4987                 rc = mwl8k_cmd_rf_tx_power(hw, conf->power_level);
4988                 if (rc)
4989                         goto out;
4990                 rc = mwl8k_cmd_mimo_config(hw, 0x7, 0x7);
4991         }
4992
4993 out:
4994         mwl8k_fw_unlock(hw);
4995
4996         return rc;
4997 }
4998
4999 static void
5000 mwl8k_bss_info_changed_sta(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5001                            struct ieee80211_bss_conf *info, u32 changed)
5002 {
5003         struct mwl8k_priv *priv = hw->priv;
5004         u32 ap_legacy_rates = 0;
5005         u8 ap_mcs_rates[16];
5006         int rc;
5007
5008         if (mwl8k_fw_lock(hw))
5009                 return;
5010
5011         /*
5012          * No need to capture a beacon if we're no longer associated.
5013          */
5014         if ((changed & BSS_CHANGED_ASSOC) && !vif->bss_conf.assoc)
5015                 priv->capture_beacon = false;
5016
5017         /*
5018          * Get the AP's legacy and MCS rates.
5019          */
5020         if (vif->bss_conf.assoc) {
5021                 struct ieee80211_sta *ap;
5022
5023                 rcu_read_lock();
5024
5025                 ap = ieee80211_find_sta(vif, vif->bss_conf.bssid);
5026                 if (ap == NULL) {
5027                         rcu_read_unlock();
5028                         goto out;
5029                 }
5030
5031                 if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ) {
5032                         ap_legacy_rates = ap->supp_rates[NL80211_BAND_2GHZ];
5033                 } else {
5034                         ap_legacy_rates =
5035                                 ap->supp_rates[NL80211_BAND_5GHZ] << 5;
5036                 }
5037                 memcpy(ap_mcs_rates, ap->ht_cap.mcs.rx_mask, 16);
5038
5039                 rcu_read_unlock();
5040
5041                 if (changed & BSS_CHANGED_ASSOC) {
5042                         if (!priv->ap_fw) {
5043                                 rc = mwl8k_cmd_set_rate(hw, vif,
5044                                                         ap_legacy_rates,
5045                                                         ap_mcs_rates);
5046                                 if (rc)
5047                                         goto out;
5048
5049                                 rc = mwl8k_cmd_use_fixed_rate_sta(hw);
5050                                 if (rc)
5051                                         goto out;
5052                         } else {
5053                                 int idx;
5054                                 int rate;
5055
5056                                 /* Use AP firmware specific rate command.
5057                                  */
5058                                 idx = ffs(vif->bss_conf.basic_rates);
5059                                 if (idx)
5060                                         idx--;
5061
5062                                 if (hw->conf.chandef.chan->band ==
5063                                     NL80211_BAND_2GHZ)
5064                                         rate = mwl8k_rates_24[idx].hw_value;
5065                                 else
5066                                         rate = mwl8k_rates_50[idx].hw_value;
5067
5068                                 mwl8k_cmd_use_fixed_rate_ap(hw, rate, rate);
5069                         }
5070                 }
5071         }
5072
5073         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
5074                 rc = mwl8k_set_radio_preamble(hw,
5075                                 vif->bss_conf.use_short_preamble);
5076                 if (rc)
5077                         goto out;
5078         }
5079
5080         if ((changed & BSS_CHANGED_ERP_SLOT) && !priv->ap_fw)  {
5081                 rc = mwl8k_cmd_set_slot(hw, vif->bss_conf.use_short_slot);
5082                 if (rc)
5083                         goto out;
5084         }
5085
5086         if (vif->bss_conf.assoc && !priv->ap_fw &&
5087             (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_ERP_CTS_PROT |
5088                         BSS_CHANGED_HT))) {
5089                 rc = mwl8k_cmd_set_aid(hw, vif, ap_legacy_rates);
5090                 if (rc)
5091                         goto out;
5092         }
5093
5094         if (vif->bss_conf.assoc &&
5095             (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_BEACON_INT))) {
5096                 /*
5097                  * Finalize the join.  Tell rx handler to process
5098                  * next beacon from our BSSID.
5099                  */
5100                 memcpy(priv->capture_bssid, vif->bss_conf.bssid, ETH_ALEN);
5101                 priv->capture_beacon = true;
5102         }
5103
5104 out:
5105         mwl8k_fw_unlock(hw);
5106 }
5107
5108 static void
5109 mwl8k_bss_info_changed_ap(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5110                           struct ieee80211_bss_conf *info, u32 changed)
5111 {
5112         int rc;
5113
5114         if (mwl8k_fw_lock(hw))
5115                 return;
5116
5117         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
5118                 rc = mwl8k_set_radio_preamble(hw,
5119                                 vif->bss_conf.use_short_preamble);
5120                 if (rc)
5121                         goto out;
5122         }
5123
5124         if (changed & BSS_CHANGED_BASIC_RATES) {
5125                 int idx;
5126                 int rate;
5127
5128                 /*
5129                  * Use lowest supported basic rate for multicasts
5130                  * and management frames (such as probe responses --
5131                  * beacons will always go out at 1 Mb/s).
5132                  */
5133                 idx = ffs(vif->bss_conf.basic_rates);
5134                 if (idx)
5135                         idx--;
5136
5137                 if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ)
5138                         rate = mwl8k_rates_24[idx].hw_value;
5139                 else
5140                         rate = mwl8k_rates_50[idx].hw_value;
5141
5142                 mwl8k_cmd_use_fixed_rate_ap(hw, rate, rate);
5143         }
5144
5145         if (changed & (BSS_CHANGED_BEACON_INT | BSS_CHANGED_BEACON)) {
5146                 struct sk_buff *skb;
5147
5148                 skb = ieee80211_beacon_get(hw, vif);
5149                 if (skb != NULL) {
5150                         mwl8k_cmd_set_beacon(hw, vif, skb->data, skb->len);
5151                         kfree_skb(skb);
5152                 }
5153         }
5154
5155         if (changed & BSS_CHANGED_BEACON_ENABLED)
5156                 mwl8k_cmd_bss_start(hw, vif, info->enable_beacon);
5157
5158 out:
5159         mwl8k_fw_unlock(hw);
5160 }
5161
5162 static void
5163 mwl8k_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5164                        struct ieee80211_bss_conf *info, u32 changed)
5165 {
5166         if (vif->type == NL80211_IFTYPE_STATION)
5167                 mwl8k_bss_info_changed_sta(hw, vif, info, changed);
5168         if (vif->type == NL80211_IFTYPE_AP)
5169                 mwl8k_bss_info_changed_ap(hw, vif, info, changed);
5170 }
5171
5172 static u64 mwl8k_prepare_multicast(struct ieee80211_hw *hw,
5173                                    struct netdev_hw_addr_list *mc_list)
5174 {
5175         struct mwl8k_cmd_pkt *cmd;
5176
5177         /*
5178          * Synthesize and return a command packet that programs the
5179          * hardware multicast address filter.  At this point we don't
5180          * know whether FIF_ALLMULTI is being requested, but if it is,
5181          * we'll end up throwing this packet away and creating a new
5182          * one in mwl8k_configure_filter().
5183          */
5184         cmd = __mwl8k_cmd_mac_multicast_adr(hw, 0, mc_list);
5185
5186         return (unsigned long)cmd;
5187 }
5188
5189 static int
5190 mwl8k_configure_filter_sniffer(struct ieee80211_hw *hw,
5191                                unsigned int changed_flags,
5192                                unsigned int *total_flags)
5193 {
5194         struct mwl8k_priv *priv = hw->priv;
5195
5196         /*
5197          * Hardware sniffer mode is mutually exclusive with STA
5198          * operation, so refuse to enable sniffer mode if a STA
5199          * interface is active.
5200          */
5201         if (!list_empty(&priv->vif_list)) {
5202                 if (net_ratelimit())
5203                         wiphy_info(hw->wiphy,
5204                                    "not enabling sniffer mode because STA interface is active\n");
5205                 return 0;
5206         }
5207
5208         if (!priv->sniffer_enabled) {
5209                 if (mwl8k_cmd_enable_sniffer(hw, 1))
5210                         return 0;
5211                 priv->sniffer_enabled = true;
5212         }
5213
5214         *total_flags &= FIF_ALLMULTI |
5215                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL |
5216                         FIF_OTHER_BSS;
5217
5218         return 1;
5219 }
5220
5221 static struct mwl8k_vif *mwl8k_first_vif(struct mwl8k_priv *priv)
5222 {
5223         if (!list_empty(&priv->vif_list))
5224                 return list_entry(priv->vif_list.next, struct mwl8k_vif, list);
5225
5226         return NULL;
5227 }
5228
5229 static void mwl8k_configure_filter(struct ieee80211_hw *hw,
5230                                    unsigned int changed_flags,
5231                                    unsigned int *total_flags,
5232                                    u64 multicast)
5233 {
5234         struct mwl8k_priv *priv = hw->priv;
5235         struct mwl8k_cmd_pkt *cmd = (void *)(unsigned long)multicast;
5236
5237         /*
5238          * AP firmware doesn't allow fine-grained control over
5239          * the receive filter.
5240          */
5241         if (priv->ap_fw) {
5242                 *total_flags &= FIF_ALLMULTI | FIF_BCN_PRBRESP_PROMISC;
5243                 kfree(cmd);
5244                 return;
5245         }
5246
5247         /*
5248          * Enable hardware sniffer mode if FIF_CONTROL or
5249          * FIF_OTHER_BSS is requested.
5250          */
5251         if (*total_flags & (FIF_CONTROL | FIF_OTHER_BSS) &&
5252             mwl8k_configure_filter_sniffer(hw, changed_flags, total_flags)) {
5253                 kfree(cmd);
5254                 return;
5255         }
5256
5257         /* Clear unsupported feature flags */
5258         *total_flags &= FIF_ALLMULTI | FIF_BCN_PRBRESP_PROMISC;
5259
5260         if (mwl8k_fw_lock(hw)) {
5261                 kfree(cmd);
5262                 return;
5263         }
5264
5265         if (priv->sniffer_enabled) {
5266                 mwl8k_cmd_enable_sniffer(hw, 0);
5267                 priv->sniffer_enabled = false;
5268         }
5269
5270         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
5271                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC) {
5272                         /*
5273                          * Disable the BSS filter.
5274                          */
5275                         mwl8k_cmd_set_pre_scan(hw);
5276                 } else {
5277                         struct mwl8k_vif *mwl8k_vif;
5278                         const u8 *bssid;
5279
5280                         /*
5281                          * Enable the BSS filter.
5282                          *
5283                          * If there is an active STA interface, use that
5284                          * interface's BSSID, otherwise use a dummy one
5285                          * (where the OUI part needs to be nonzero for
5286                          * the BSSID to be accepted by POST_SCAN).
5287                          */
5288                         mwl8k_vif = mwl8k_first_vif(priv);
5289                         if (mwl8k_vif != NULL)
5290                                 bssid = mwl8k_vif->vif->bss_conf.bssid;
5291                         else
5292                                 bssid = "\x01\x00\x00\x00\x00\x00";
5293
5294                         mwl8k_cmd_set_post_scan(hw, bssid);
5295                 }
5296         }
5297
5298         /*
5299          * If FIF_ALLMULTI is being requested, throw away the command
5300          * packet that ->prepare_multicast() built and replace it with
5301          * a command packet that enables reception of all multicast
5302          * packets.
5303          */
5304         if (*total_flags & FIF_ALLMULTI) {
5305                 kfree(cmd);
5306                 cmd = __mwl8k_cmd_mac_multicast_adr(hw, 1, NULL);
5307         }
5308
5309         if (cmd != NULL) {
5310                 mwl8k_post_cmd(hw, cmd);
5311                 kfree(cmd);
5312         }
5313
5314         mwl8k_fw_unlock(hw);
5315 }
5316
5317 static int mwl8k_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
5318 {
5319         return mwl8k_cmd_set_rts_threshold(hw, value);
5320 }
5321
5322 static int mwl8k_sta_remove(struct ieee80211_hw *hw,
5323                             struct ieee80211_vif *vif,
5324                             struct ieee80211_sta *sta)
5325 {
5326         struct mwl8k_priv *priv = hw->priv;
5327
5328         if (priv->ap_fw)
5329                 return mwl8k_cmd_set_new_stn_del(hw, vif, sta->addr);
5330         else
5331                 return mwl8k_cmd_update_stadb_del(hw, vif, sta->addr);
5332 }
5333
5334 static int mwl8k_sta_add(struct ieee80211_hw *hw,
5335                          struct ieee80211_vif *vif,
5336                          struct ieee80211_sta *sta)
5337 {
5338         struct mwl8k_priv *priv = hw->priv;
5339         int ret;
5340         int i;
5341         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
5342         struct ieee80211_key_conf *key;
5343
5344         if (!priv->ap_fw) {
5345                 ret = mwl8k_cmd_update_stadb_add(hw, vif, sta);
5346                 if (ret >= 0) {
5347                         MWL8K_STA(sta)->peer_id = ret;
5348                         if (sta->ht_cap.ht_supported)
5349                                 MWL8K_STA(sta)->is_ampdu_allowed = true;
5350                         ret = 0;
5351                 }
5352
5353         } else {
5354                 ret = mwl8k_cmd_set_new_stn_add(hw, vif, sta);
5355         }
5356
5357         for (i = 0; i < NUM_WEP_KEYS; i++) {
5358                 key = IEEE80211_KEY_CONF(mwl8k_vif->wep_key_conf[i].key);
5359                 if (mwl8k_vif->wep_key_conf[i].enabled)
5360                         mwl8k_set_key(hw, SET_KEY, vif, sta, key);
5361         }
5362         return ret;
5363 }
5364
5365 static int mwl8k_conf_tx(struct ieee80211_hw *hw,
5366                          struct ieee80211_vif *vif, u16 queue,
5367                          const struct ieee80211_tx_queue_params *params)
5368 {
5369         struct mwl8k_priv *priv = hw->priv;
5370         int rc;
5371
5372         rc = mwl8k_fw_lock(hw);
5373         if (!rc) {
5374                 BUG_ON(queue > MWL8K_TX_WMM_QUEUES - 1);
5375                 memcpy(&priv->wmm_params[queue], params, sizeof(*params));
5376
5377                 if (!priv->wmm_enabled)
5378                         rc = mwl8k_cmd_set_wmm_mode(hw, 1);
5379
5380                 if (!rc) {
5381                         int q = MWL8K_TX_WMM_QUEUES - 1 - queue;
5382                         rc = mwl8k_cmd_set_edca_params(hw, q,
5383                                                        params->cw_min,
5384                                                        params->cw_max,
5385                                                        params->aifs,
5386                                                        params->txop);
5387                 }
5388
5389                 mwl8k_fw_unlock(hw);
5390         }
5391
5392         return rc;
5393 }
5394
5395 static int mwl8k_get_stats(struct ieee80211_hw *hw,
5396                            struct ieee80211_low_level_stats *stats)
5397 {
5398         return mwl8k_cmd_get_stat(hw, stats);
5399 }
5400
5401 static int mwl8k_get_survey(struct ieee80211_hw *hw, int idx,
5402                                 struct survey_info *survey)
5403 {
5404         struct mwl8k_priv *priv = hw->priv;
5405         struct ieee80211_conf *conf = &hw->conf;
5406         struct ieee80211_supported_band *sband;
5407
5408         if (priv->ap_fw) {
5409                 sband = hw->wiphy->bands[NL80211_BAND_2GHZ];
5410
5411                 if (sband && idx >= sband->n_channels) {
5412                         idx -= sband->n_channels;
5413                         sband = NULL;
5414                 }
5415
5416                 if (!sband)
5417                         sband = hw->wiphy->bands[NL80211_BAND_5GHZ];
5418
5419                 if (!sband || idx >= sband->n_channels)
5420                         return -ENOENT;
5421
5422                 memcpy(survey, &priv->survey[idx], sizeof(*survey));
5423                 survey->channel = &sband->channels[idx];
5424
5425                 return 0;
5426         }
5427
5428         if (idx != 0)
5429                 return -ENOENT;
5430
5431         survey->channel = conf->chandef.chan;
5432         survey->filled = SURVEY_INFO_NOISE_DBM;
5433         survey->noise = priv->noise;
5434
5435         return 0;
5436 }
5437
5438 #define MAX_AMPDU_ATTEMPTS 5
5439
5440 static int
5441 mwl8k_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5442                    struct ieee80211_ampdu_params *params)
5443 {
5444         struct ieee80211_sta *sta = params->sta;
5445         enum ieee80211_ampdu_mlme_action action = params->action;
5446         u16 tid = params->tid;
5447         u16 *ssn = &params->ssn;
5448         u8 buf_size = params->buf_size;
5449         int i, rc = 0;
5450         struct mwl8k_priv *priv = hw->priv;
5451         struct mwl8k_ampdu_stream *stream;
5452         u8 *addr = sta->addr, idx;
5453         struct mwl8k_sta *sta_info = MWL8K_STA(sta);
5454
5455         if (!ieee80211_hw_check(hw, AMPDU_AGGREGATION))
5456                 return -ENOTSUPP;
5457
5458         spin_lock(&priv->stream_lock);
5459         stream = mwl8k_lookup_stream(hw, addr, tid);
5460
5461         switch (action) {
5462         case IEEE80211_AMPDU_RX_START:
5463         case IEEE80211_AMPDU_RX_STOP:
5464                 break;
5465         case IEEE80211_AMPDU_TX_START:
5466                 /* By the time we get here the hw queues may contain outgoing
5467                  * packets for this RA/TID that are not part of this BA
5468                  * session.  The hw will assign sequence numbers to these
5469                  * packets as they go out.  So if we query the hw for its next
5470                  * sequence number and use that for the SSN here, it may end up
5471                  * being wrong, which will lead to sequence number mismatch at
5472                  * the recipient.  To avoid this, we reset the sequence number
5473                  * to O for the first MPDU in this BA stream.
5474                  */
5475                 *ssn = 0;
5476                 if (stream == NULL) {
5477                         /* This means that somebody outside this driver called
5478                          * ieee80211_start_tx_ba_session.  This is unexpected
5479                          * because we do our own rate control.  Just warn and
5480                          * move on.
5481                          */
5482                         wiphy_warn(hw->wiphy, "Unexpected call to %s.  "
5483                                    "Proceeding anyway.\n", __func__);
5484                         stream = mwl8k_add_stream(hw, sta, tid);
5485                 }
5486                 if (stream == NULL) {
5487                         wiphy_debug(hw->wiphy, "no free AMPDU streams\n");
5488                         rc = -EBUSY;
5489                         break;
5490                 }
5491                 stream->state = AMPDU_STREAM_IN_PROGRESS;
5492
5493                 /* Release the lock before we do the time consuming stuff */
5494                 spin_unlock(&priv->stream_lock);
5495                 for (i = 0; i < MAX_AMPDU_ATTEMPTS; i++) {
5496
5497                         /* Check if link is still valid */
5498                         if (!sta_info->is_ampdu_allowed) {
5499                                 spin_lock(&priv->stream_lock);
5500                                 mwl8k_remove_stream(hw, stream);
5501                                 spin_unlock(&priv->stream_lock);
5502                                 return -EBUSY;
5503                         }
5504
5505                         rc = mwl8k_check_ba(hw, stream, vif);
5506
5507                         /* If HW restart is in progress mwl8k_post_cmd will
5508                          * return -EBUSY. Avoid retrying mwl8k_check_ba in
5509                          * such cases
5510                          */
5511                         if (!rc || rc == -EBUSY)
5512                                 break;
5513                         /*
5514                          * HW queues take time to be flushed, give them
5515                          * sufficient time
5516                          */
5517
5518                         msleep(1000);
5519                 }
5520                 spin_lock(&priv->stream_lock);
5521                 if (rc) {
5522                         wiphy_err(hw->wiphy, "Stream for tid %d busy after %d"
5523                                 " attempts\n", tid, MAX_AMPDU_ATTEMPTS);
5524                         mwl8k_remove_stream(hw, stream);
5525                         rc = -EBUSY;
5526                         break;
5527                 }
5528                 rc = IEEE80211_AMPDU_TX_START_IMMEDIATE;
5529                 break;
5530         case IEEE80211_AMPDU_TX_STOP_CONT:
5531         case IEEE80211_AMPDU_TX_STOP_FLUSH:
5532         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
5533                 if (stream) {
5534                         if (stream->state == AMPDU_STREAM_ACTIVE) {
5535                                 idx = stream->idx;
5536                                 spin_unlock(&priv->stream_lock);
5537                                 mwl8k_destroy_ba(hw, idx);
5538                                 spin_lock(&priv->stream_lock);
5539                         }
5540                         mwl8k_remove_stream(hw, stream);
5541                 }
5542                 ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
5543                 break;
5544         case IEEE80211_AMPDU_TX_OPERATIONAL:
5545                 BUG_ON(stream == NULL);
5546                 BUG_ON(stream->state != AMPDU_STREAM_IN_PROGRESS);
5547                 spin_unlock(&priv->stream_lock);
5548                 rc = mwl8k_create_ba(hw, stream, buf_size, vif);
5549                 spin_lock(&priv->stream_lock);
5550                 if (!rc)
5551                         stream->state = AMPDU_STREAM_ACTIVE;
5552                 else {
5553                         idx = stream->idx;
5554                         spin_unlock(&priv->stream_lock);
5555                         mwl8k_destroy_ba(hw, idx);
5556                         spin_lock(&priv->stream_lock);
5557                         wiphy_debug(hw->wiphy,
5558                                 "Failed adding stream for sta %pM tid %d\n",
5559                                 addr, tid);
5560                         mwl8k_remove_stream(hw, stream);
5561                 }
5562                 break;
5563
5564         default:
5565                 rc = -ENOTSUPP;
5566         }
5567
5568         spin_unlock(&priv->stream_lock);
5569         return rc;
5570 }
5571
5572 static void mwl8k_sw_scan_start(struct ieee80211_hw *hw,
5573                                 struct ieee80211_vif *vif,
5574                                 const u8 *mac_addr)
5575 {
5576         struct mwl8k_priv *priv = hw->priv;
5577         u8 tmp;
5578
5579         if (!priv->ap_fw)
5580                 return;
5581
5582         /* clear all stats */
5583         priv->channel_time = 0;
5584         ioread32(priv->regs + BBU_RXRDY_CNT_REG);
5585         ioread32(priv->regs + NOK_CCA_CNT_REG);
5586         mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &tmp);
5587
5588         priv->sw_scan_start = true;
5589 }
5590
5591 static void mwl8k_sw_scan_complete(struct ieee80211_hw *hw,
5592                                    struct ieee80211_vif *vif)
5593 {
5594         struct mwl8k_priv *priv = hw->priv;
5595         u8 tmp;
5596
5597         if (!priv->ap_fw)
5598                 return;
5599
5600         priv->sw_scan_start = false;
5601
5602         /* clear all stats */
5603         priv->channel_time = 0;
5604         ioread32(priv->regs + BBU_RXRDY_CNT_REG);
5605         ioread32(priv->regs + NOK_CCA_CNT_REG);
5606         mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &tmp);
5607 }
5608
5609 static const struct ieee80211_ops mwl8k_ops = {
5610         .tx                     = mwl8k_tx,
5611         .start                  = mwl8k_start,
5612         .stop                   = mwl8k_stop,
5613         .add_interface          = mwl8k_add_interface,
5614         .remove_interface       = mwl8k_remove_interface,
5615         .config                 = mwl8k_config,
5616         .bss_info_changed       = mwl8k_bss_info_changed,
5617         .prepare_multicast      = mwl8k_prepare_multicast,
5618         .configure_filter       = mwl8k_configure_filter,
5619         .set_key                = mwl8k_set_key,
5620         .set_rts_threshold      = mwl8k_set_rts_threshold,
5621         .sta_add                = mwl8k_sta_add,
5622         .sta_remove             = mwl8k_sta_remove,
5623         .conf_tx                = mwl8k_conf_tx,
5624         .get_stats              = mwl8k_get_stats,
5625         .get_survey             = mwl8k_get_survey,
5626         .ampdu_action           = mwl8k_ampdu_action,
5627         .sw_scan_start          = mwl8k_sw_scan_start,
5628         .sw_scan_complete       = mwl8k_sw_scan_complete,
5629 };
5630
5631 static void mwl8k_finalize_join_worker(struct work_struct *work)
5632 {
5633         struct mwl8k_priv *priv =
5634                 container_of(work, struct mwl8k_priv, finalize_join_worker);
5635         struct sk_buff *skb = priv->beacon_skb;
5636         struct ieee80211_mgmt *mgmt = (void *)skb->data;
5637         int len = skb->len - offsetof(struct ieee80211_mgmt, u.beacon.variable);
5638         const u8 *tim = cfg80211_find_ie(WLAN_EID_TIM,
5639                                          mgmt->u.beacon.variable, len);
5640         int dtim_period = 1;
5641
5642         if (tim && tim[1] >= 2)
5643                 dtim_period = tim[3];
5644
5645         mwl8k_cmd_finalize_join(priv->hw, skb->data, skb->len, dtim_period);
5646
5647         dev_kfree_skb(skb);
5648         priv->beacon_skb = NULL;
5649 }
5650
5651 enum {
5652         MWL8363 = 0,
5653         MWL8687,
5654         MWL8366,
5655         MWL8764,
5656 };
5657
5658 #define MWL8K_8366_AP_FW_API 3
5659 #define _MWL8K_8366_AP_FW(api) "mwl8k/fmimage_8366_ap-" #api ".fw"
5660 #define MWL8K_8366_AP_FW(api) _MWL8K_8366_AP_FW(api)
5661
5662 #define MWL8K_8764_AP_FW_API 1
5663 #define _MWL8K_8764_AP_FW(api) "mwl8k/fmimage_8764_ap-" #api ".fw"
5664 #define MWL8K_8764_AP_FW(api) _MWL8K_8764_AP_FW(api)
5665
5666 static struct mwl8k_device_info mwl8k_info_tbl[] = {
5667         [MWL8363] = {
5668                 .part_name      = "88w8363",
5669                 .helper_image   = "mwl8k/helper_8363.fw",
5670                 .fw_image_sta   = "mwl8k/fmimage_8363.fw",
5671         },
5672         [MWL8687] = {
5673                 .part_name      = "88w8687",
5674                 .helper_image   = "mwl8k/helper_8687.fw",
5675                 .fw_image_sta   = "mwl8k/fmimage_8687.fw",
5676         },
5677         [MWL8366] = {
5678                 .part_name      = "88w8366",
5679                 .helper_image   = "mwl8k/helper_8366.fw",
5680                 .fw_image_sta   = "mwl8k/fmimage_8366.fw",
5681                 .fw_image_ap    = MWL8K_8366_AP_FW(MWL8K_8366_AP_FW_API),
5682                 .fw_api_ap      = MWL8K_8366_AP_FW_API,
5683                 .ap_rxd_ops     = &rxd_ap_ops,
5684         },
5685         [MWL8764] = {
5686                 .part_name      = "88w8764",
5687                 .fw_image_ap    = MWL8K_8764_AP_FW(MWL8K_8764_AP_FW_API),
5688                 .fw_api_ap      = MWL8K_8764_AP_FW_API,
5689                 .ap_rxd_ops     = &rxd_ap_ops,
5690         },
5691 };
5692
5693 MODULE_FIRMWARE("mwl8k/helper_8363.fw");
5694 MODULE_FIRMWARE("mwl8k/fmimage_8363.fw");
5695 MODULE_FIRMWARE("mwl8k/helper_8687.fw");
5696 MODULE_FIRMWARE("mwl8k/fmimage_8687.fw");
5697 MODULE_FIRMWARE("mwl8k/helper_8366.fw");
5698 MODULE_FIRMWARE("mwl8k/fmimage_8366.fw");
5699 MODULE_FIRMWARE(MWL8K_8366_AP_FW(MWL8K_8366_AP_FW_API));
5700
5701 static const struct pci_device_id mwl8k_pci_id_table[] = {
5702         { PCI_VDEVICE(MARVELL, 0x2a0a), .driver_data = MWL8363, },
5703         { PCI_VDEVICE(MARVELL, 0x2a0c), .driver_data = MWL8363, },
5704         { PCI_VDEVICE(MARVELL, 0x2a24), .driver_data = MWL8363, },
5705         { PCI_VDEVICE(MARVELL, 0x2a2b), .driver_data = MWL8687, },
5706         { PCI_VDEVICE(MARVELL, 0x2a30), .driver_data = MWL8687, },
5707         { PCI_VDEVICE(MARVELL, 0x2a40), .driver_data = MWL8366, },
5708         { PCI_VDEVICE(MARVELL, 0x2a41), .driver_data = MWL8366, },
5709         { PCI_VDEVICE(MARVELL, 0x2a42), .driver_data = MWL8366, },
5710         { PCI_VDEVICE(MARVELL, 0x2a43), .driver_data = MWL8366, },
5711         { PCI_VDEVICE(MARVELL, 0x2b36), .driver_data = MWL8764, },
5712         { },
5713 };
5714 MODULE_DEVICE_TABLE(pci, mwl8k_pci_id_table);
5715
5716 static int mwl8k_request_alt_fw(struct mwl8k_priv *priv)
5717 {
5718         int rc;
5719         printk(KERN_ERR "%s: Error requesting preferred fw %s.\n"
5720                "Trying alternative firmware %s\n", pci_name(priv->pdev),
5721                priv->fw_pref, priv->fw_alt);
5722         rc = mwl8k_request_fw(priv, priv->fw_alt, &priv->fw_ucode, true);
5723         if (rc) {
5724                 printk(KERN_ERR "%s: Error requesting alt fw %s\n",
5725                        pci_name(priv->pdev), priv->fw_alt);
5726                 return rc;
5727         }
5728         return 0;
5729 }
5730
5731 static int mwl8k_firmware_load_success(struct mwl8k_priv *priv);
5732 static void mwl8k_fw_state_machine(const struct firmware *fw, void *context)
5733 {
5734         struct mwl8k_priv *priv = context;
5735         struct mwl8k_device_info *di = priv->device_info;
5736         int rc;
5737
5738         switch (priv->fw_state) {
5739         case FW_STATE_INIT:
5740                 if (!fw) {
5741                         printk(KERN_ERR "%s: Error requesting helper fw %s\n",
5742                                pci_name(priv->pdev), di->helper_image);
5743                         goto fail;
5744                 }
5745                 priv->fw_helper = fw;
5746                 rc = mwl8k_request_fw(priv, priv->fw_pref, &priv->fw_ucode,
5747                                       true);
5748                 if (rc && priv->fw_alt) {
5749                         rc = mwl8k_request_alt_fw(priv);
5750                         if (rc)
5751                                 goto fail;
5752                         priv->fw_state = FW_STATE_LOADING_ALT;
5753                 } else if (rc)
5754                         goto fail;
5755                 else
5756                         priv->fw_state = FW_STATE_LOADING_PREF;
5757                 break;
5758
5759         case FW_STATE_LOADING_PREF:
5760                 if (!fw) {
5761                         if (priv->fw_alt) {
5762                                 rc = mwl8k_request_alt_fw(priv);
5763                                 if (rc)
5764                                         goto fail;
5765                                 priv->fw_state = FW_STATE_LOADING_ALT;
5766                         } else
5767                                 goto fail;
5768                 } else {
5769                         priv->fw_ucode = fw;
5770                         rc = mwl8k_firmware_load_success(priv);
5771                         if (rc)
5772                                 goto fail;
5773                         else
5774                                 complete(&priv->firmware_loading_complete);
5775                 }
5776                 break;
5777
5778         case FW_STATE_LOADING_ALT:
5779                 if (!fw) {
5780                         printk(KERN_ERR "%s: Error requesting alt fw %s\n",
5781                                pci_name(priv->pdev), di->helper_image);
5782                         goto fail;
5783                 }
5784                 priv->fw_ucode = fw;
5785                 rc = mwl8k_firmware_load_success(priv);
5786                 if (rc)
5787                         goto fail;
5788                 else
5789                         complete(&priv->firmware_loading_complete);
5790                 break;
5791
5792         default:
5793                 printk(KERN_ERR "%s: Unexpected firmware loading state: %d\n",
5794                        MWL8K_NAME, priv->fw_state);
5795                 BUG_ON(1);
5796         }
5797
5798         return;
5799
5800 fail:
5801         priv->fw_state = FW_STATE_ERROR;
5802         complete(&priv->firmware_loading_complete);
5803         device_release_driver(&priv->pdev->dev);
5804         mwl8k_release_firmware(priv);
5805 }
5806
5807 #define MAX_RESTART_ATTEMPTS 1
5808 static int mwl8k_init_firmware(struct ieee80211_hw *hw, char *fw_image,
5809                                bool nowait)
5810 {
5811         struct mwl8k_priv *priv = hw->priv;
5812         int rc;
5813         int count = MAX_RESTART_ATTEMPTS;
5814
5815 retry:
5816         /* Reset firmware and hardware */
5817         mwl8k_hw_reset(priv);
5818
5819         /* Ask userland hotplug daemon for the device firmware */
5820         rc = mwl8k_request_firmware(priv, fw_image, nowait);
5821         if (rc) {
5822                 wiphy_err(hw->wiphy, "Firmware files not found\n");
5823                 return rc;
5824         }
5825
5826         if (nowait)
5827                 return rc;
5828
5829         /* Load firmware into hardware */
5830         rc = mwl8k_load_firmware(hw);
5831         if (rc)
5832                 wiphy_err(hw->wiphy, "Cannot start firmware\n");
5833
5834         /* Reclaim memory once firmware is successfully loaded */
5835         mwl8k_release_firmware(priv);
5836
5837         if (rc && count) {
5838                 /* FW did not start successfully;
5839                  * lets try one more time
5840                  */
5841                 count--;
5842                 wiphy_err(hw->wiphy, "Trying to reload the firmware again\n");
5843                 msleep(20);
5844                 goto retry;
5845         }
5846
5847         return rc;
5848 }
5849
5850 static int mwl8k_init_txqs(struct ieee80211_hw *hw)
5851 {
5852         struct mwl8k_priv *priv = hw->priv;
5853         int rc = 0;
5854         int i;
5855
5856         for (i = 0; i < mwl8k_tx_queues(priv); i++) {
5857                 rc = mwl8k_txq_init(hw, i);
5858                 if (rc)
5859                         break;
5860                 if (priv->ap_fw)
5861                         iowrite32(priv->txq[i].txd_dma,
5862                                   priv->sram + priv->txq_offset[i]);
5863         }
5864         return rc;
5865 }
5866
5867 /* initialize hw after successfully loading a firmware image */
5868 static int mwl8k_probe_hw(struct ieee80211_hw *hw)
5869 {
5870         struct mwl8k_priv *priv = hw->priv;
5871         int rc = 0;
5872         int i;
5873
5874         if (priv->ap_fw) {
5875                 priv->rxd_ops = priv->device_info->ap_rxd_ops;
5876                 if (priv->rxd_ops == NULL) {
5877                         wiphy_err(hw->wiphy,
5878                                   "Driver does not have AP firmware image support for this hardware\n");
5879                         rc = -ENOENT;
5880                         goto err_stop_firmware;
5881                 }
5882         } else {
5883                 priv->rxd_ops = &rxd_sta_ops;
5884         }
5885
5886         priv->sniffer_enabled = false;
5887         priv->wmm_enabled = false;
5888         priv->pending_tx_pkts = 0;
5889         atomic_set(&priv->watchdog_event_pending, 0);
5890
5891         rc = mwl8k_rxq_init(hw, 0);
5892         if (rc)
5893                 goto err_stop_firmware;
5894         rxq_refill(hw, 0, INT_MAX);
5895
5896         /* For the sta firmware, we need to know the dma addresses of tx queues
5897          * before sending MWL8K_CMD_GET_HW_SPEC.  So we must initialize them
5898          * prior to issuing this command.  But for the AP case, we learn the
5899          * total number of queues from the result CMD_GET_HW_SPEC, so for this
5900          * case we must initialize the tx queues after.
5901          */
5902         priv->num_ampdu_queues = 0;
5903         if (!priv->ap_fw) {
5904                 rc = mwl8k_init_txqs(hw);
5905                 if (rc)
5906                         goto err_free_queues;
5907         }
5908
5909         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
5910         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5911         iowrite32(MWL8K_A2H_INT_TX_DONE|MWL8K_A2H_INT_RX_READY|
5912                   MWL8K_A2H_INT_BA_WATCHDOG,
5913                   priv->regs + MWL8K_HIU_A2H_INTERRUPT_CLEAR_SEL);
5914         iowrite32(MWL8K_A2H_INT_OPC_DONE,
5915                   priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
5916
5917         rc = request_irq(priv->pdev->irq, mwl8k_interrupt,
5918                          IRQF_SHARED, MWL8K_NAME, hw);
5919         if (rc) {
5920                 wiphy_err(hw->wiphy, "failed to register IRQ handler\n");
5921                 goto err_free_queues;
5922         }
5923
5924         /*
5925          * When hw restart is requested,
5926          * mac80211 will take care of clearing
5927          * the ampdu streams, so do not clear
5928          * the ampdu state here
5929          */
5930         if (!priv->hw_restart_in_progress)
5931                 memset(priv->ampdu, 0, sizeof(priv->ampdu));
5932
5933         /*
5934          * Temporarily enable interrupts.  Initial firmware host
5935          * commands use interrupts and avoid polling.  Disable
5936          * interrupts when done.
5937          */
5938         iowrite32(MWL8K_A2H_EVENTS, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5939
5940         /* Get config data, mac addrs etc */
5941         if (priv->ap_fw) {
5942                 rc = mwl8k_cmd_get_hw_spec_ap(hw);
5943                 if (!rc)
5944                         rc = mwl8k_init_txqs(hw);
5945                 if (!rc)
5946                         rc = mwl8k_cmd_set_hw_spec(hw);
5947         } else {
5948                 rc = mwl8k_cmd_get_hw_spec_sta(hw);
5949         }
5950         if (rc) {
5951                 wiphy_err(hw->wiphy, "Cannot initialise firmware\n");
5952                 goto err_free_irq;
5953         }
5954
5955         /* Turn radio off */
5956         rc = mwl8k_cmd_radio_disable(hw);
5957         if (rc) {
5958                 wiphy_err(hw->wiphy, "Cannot disable\n");
5959                 goto err_free_irq;
5960         }
5961
5962         /* Clear MAC address */
5963         rc = mwl8k_cmd_set_mac_addr(hw, NULL, "\x00\x00\x00\x00\x00\x00");
5964         if (rc) {
5965                 wiphy_err(hw->wiphy, "Cannot clear MAC address\n");
5966                 goto err_free_irq;
5967         }
5968
5969         /* Configure Antennas */
5970         rc = mwl8k_cmd_rf_antenna(hw, MWL8K_RF_ANTENNA_RX, 0x3);
5971         if (rc)
5972                 wiphy_warn(hw->wiphy, "failed to set # of RX antennas");
5973         rc = mwl8k_cmd_rf_antenna(hw, MWL8K_RF_ANTENNA_TX, 0x7);
5974         if (rc)
5975                 wiphy_warn(hw->wiphy, "failed to set # of TX antennas");
5976
5977
5978         /* Disable interrupts */
5979         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5980         free_irq(priv->pdev->irq, hw);
5981
5982         wiphy_info(hw->wiphy, "%s v%d, %pm, %s firmware %u.%u.%u.%u\n",
5983                    priv->device_info->part_name,
5984                    priv->hw_rev, hw->wiphy->perm_addr,
5985                    priv->ap_fw ? "AP" : "STA",
5986                    (priv->fw_rev >> 24) & 0xff, (priv->fw_rev >> 16) & 0xff,
5987                    (priv->fw_rev >> 8) & 0xff, priv->fw_rev & 0xff);
5988
5989         return 0;
5990
5991 err_free_irq:
5992         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5993         free_irq(priv->pdev->irq, hw);
5994
5995 err_free_queues:
5996         for (i = 0; i < mwl8k_tx_queues(priv); i++)
5997                 mwl8k_txq_deinit(hw, i);
5998         mwl8k_rxq_deinit(hw, 0);
5999
6000 err_stop_firmware:
6001         mwl8k_hw_reset(priv);
6002
6003         return rc;
6004 }
6005
6006 /*
6007  * invoke mwl8k_reload_firmware to change the firmware image after the device
6008  * has already been registered
6009  */
6010 static int mwl8k_reload_firmware(struct ieee80211_hw *hw, char *fw_image)
6011 {
6012         int i, rc = 0;
6013         struct mwl8k_priv *priv = hw->priv;
6014         struct mwl8k_vif *vif, *tmp_vif;
6015
6016         mwl8k_stop(hw);
6017         mwl8k_rxq_deinit(hw, 0);
6018
6019         /*
6020          * All the existing interfaces are re-added by the ieee80211_reconfig;
6021          * which means driver should remove existing interfaces before calling
6022          * ieee80211_restart_hw
6023          */
6024         if (priv->hw_restart_in_progress)
6025                 list_for_each_entry_safe(vif, tmp_vif, &priv->vif_list, list)
6026                         mwl8k_remove_vif(priv, vif);
6027
6028         for (i = 0; i < mwl8k_tx_queues(priv); i++)
6029                 mwl8k_txq_deinit(hw, i);
6030
6031         rc = mwl8k_init_firmware(hw, fw_image, false);
6032         if (rc)
6033                 goto fail;
6034
6035         rc = mwl8k_probe_hw(hw);
6036         if (rc)
6037                 goto fail;
6038
6039         if (priv->hw_restart_in_progress)
6040                 return rc;
6041
6042         rc = mwl8k_start(hw);
6043         if (rc)
6044                 goto fail;
6045
6046         rc = mwl8k_config(hw, ~0);
6047         if (rc)
6048                 goto fail;
6049
6050         for (i = 0; i < MWL8K_TX_WMM_QUEUES; i++) {
6051                 rc = mwl8k_conf_tx(hw, NULL, i, &priv->wmm_params[i]);
6052                 if (rc)
6053                         goto fail;
6054         }
6055
6056         return rc;
6057
6058 fail:
6059         printk(KERN_WARNING "mwl8k: Failed to reload firmware image.\n");
6060         return rc;
6061 }
6062
6063 static const struct ieee80211_iface_limit ap_if_limits[] = {
6064         { .max = 8,     .types = BIT(NL80211_IFTYPE_AP) },
6065         { .max = 1,     .types = BIT(NL80211_IFTYPE_STATION) },
6066 };
6067
6068 static const struct ieee80211_iface_combination ap_if_comb = {
6069         .limits = ap_if_limits,
6070         .n_limits = ARRAY_SIZE(ap_if_limits),
6071         .max_interfaces = 8,
6072         .num_different_channels = 1,
6073 };
6074
6075
6076 static int mwl8k_firmware_load_success(struct mwl8k_priv *priv)
6077 {
6078         struct ieee80211_hw *hw = priv->hw;
6079         int i, rc;
6080
6081         rc = mwl8k_load_firmware(hw);
6082         mwl8k_release_firmware(priv);
6083         if (rc) {
6084                 wiphy_err(hw->wiphy, "Cannot start firmware\n");
6085                 return rc;
6086         }
6087
6088         /*
6089          * Extra headroom is the size of the required DMA header
6090          * minus the size of the smallest 802.11 frame (CTS frame).
6091          */
6092         hw->extra_tx_headroom =
6093                 sizeof(struct mwl8k_dma_data) - sizeof(struct ieee80211_cts);
6094
6095         hw->extra_tx_headroom -= priv->ap_fw ? REDUCED_TX_HEADROOM : 0;
6096
6097         hw->queues = MWL8K_TX_WMM_QUEUES;
6098
6099         /* Set rssi values to dBm */
6100         ieee80211_hw_set(hw, SIGNAL_DBM);
6101         ieee80211_hw_set(hw, HAS_RATE_CONTROL);
6102
6103         /*
6104          * Ask mac80211 to not to trigger PS mode
6105          * based on PM bit of incoming frames.
6106          */
6107         if (priv->ap_fw)
6108                 ieee80211_hw_set(hw, AP_LINK_PS);
6109
6110         hw->vif_data_size = sizeof(struct mwl8k_vif);
6111         hw->sta_data_size = sizeof(struct mwl8k_sta);
6112
6113         priv->macids_used = 0;
6114         INIT_LIST_HEAD(&priv->vif_list);
6115
6116         /* Set default radio state and preamble */
6117         priv->radio_on = false;
6118         priv->radio_short_preamble = false;
6119
6120         /* Finalize join worker */
6121         INIT_WORK(&priv->finalize_join_worker, mwl8k_finalize_join_worker);
6122         /* Handle watchdog ba events */
6123         INIT_WORK(&priv->watchdog_ba_handle, mwl8k_watchdog_ba_events);
6124         /* To reload the firmware if it crashes */
6125         INIT_WORK(&priv->fw_reload, mwl8k_hw_restart_work);
6126
6127         /* TX reclaim and RX tasklets.  */
6128         tasklet_setup(&priv->poll_tx_task, mwl8k_tx_poll);
6129         tasklet_disable(&priv->poll_tx_task);
6130         tasklet_setup(&priv->poll_rx_task, mwl8k_rx_poll);
6131         tasklet_disable(&priv->poll_rx_task);
6132
6133         /* Power management cookie */
6134         priv->cookie = dma_alloc_coherent(&priv->pdev->dev, 4,
6135                                           &priv->cookie_dma, GFP_KERNEL);
6136         if (priv->cookie == NULL)
6137                 return -ENOMEM;
6138
6139         mutex_init(&priv->fw_mutex);
6140         priv->fw_mutex_owner = NULL;
6141         priv->fw_mutex_depth = 0;
6142         priv->hostcmd_wait = NULL;
6143
6144         spin_lock_init(&priv->tx_lock);
6145
6146         spin_lock_init(&priv->stream_lock);
6147
6148         priv->tx_wait = NULL;
6149
6150         rc = mwl8k_probe_hw(hw);
6151         if (rc)
6152                 goto err_free_cookie;
6153
6154         hw->wiphy->interface_modes = 0;
6155
6156         if (priv->ap_macids_supported || priv->device_info->fw_image_ap) {
6157                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP);
6158                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_STATION);
6159                 hw->wiphy->iface_combinations = &ap_if_comb;
6160                 hw->wiphy->n_iface_combinations = 1;
6161         }
6162
6163         if (priv->sta_macids_supported || priv->device_info->fw_image_sta)
6164                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_STATION);
6165
6166         wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
6167
6168         rc = ieee80211_register_hw(hw);
6169         if (rc) {
6170                 wiphy_err(hw->wiphy, "Cannot register device\n");
6171                 goto err_unprobe_hw;
6172         }
6173
6174         return 0;
6175
6176 err_unprobe_hw:
6177         for (i = 0; i < mwl8k_tx_queues(priv); i++)
6178                 mwl8k_txq_deinit(hw, i);
6179         mwl8k_rxq_deinit(hw, 0);
6180
6181 err_free_cookie:
6182         if (priv->cookie != NULL)
6183                 dma_free_coherent(&priv->pdev->dev, 4, priv->cookie,
6184                                   priv->cookie_dma);
6185
6186         return rc;
6187 }
6188 static int mwl8k_probe(struct pci_dev *pdev,
6189                                  const struct pci_device_id *id)
6190 {
6191         static int printed_version;
6192         struct ieee80211_hw *hw;
6193         struct mwl8k_priv *priv;
6194         struct mwl8k_device_info *di;
6195         int rc;
6196
6197         if (!printed_version) {
6198                 printk(KERN_INFO "%s version %s\n", MWL8K_DESC, MWL8K_VERSION);
6199                 printed_version = 1;
6200         }
6201
6202
6203         rc = pci_enable_device(pdev);
6204         if (rc) {
6205                 printk(KERN_ERR "%s: Cannot enable new PCI device\n",
6206                        MWL8K_NAME);
6207                 return rc;
6208         }
6209
6210         rc = pci_request_regions(pdev, MWL8K_NAME);
6211         if (rc) {
6212                 printk(KERN_ERR "%s: Cannot obtain PCI resources\n",
6213                        MWL8K_NAME);
6214                 goto err_disable_device;
6215         }
6216
6217         pci_set_master(pdev);
6218
6219
6220         hw = ieee80211_alloc_hw(sizeof(*priv), &mwl8k_ops);
6221         if (hw == NULL) {
6222                 printk(KERN_ERR "%s: ieee80211 alloc failed\n", MWL8K_NAME);
6223                 rc = -ENOMEM;
6224                 goto err_free_reg;
6225         }
6226
6227         SET_IEEE80211_DEV(hw, &pdev->dev);
6228         pci_set_drvdata(pdev, hw);
6229
6230         priv = hw->priv;
6231         priv->hw = hw;
6232         priv->pdev = pdev;
6233         priv->device_info = &mwl8k_info_tbl[id->driver_data];
6234
6235         if (id->driver_data == MWL8764)
6236                 priv->is_8764 = true;
6237
6238         priv->sram = pci_iomap(pdev, 0, 0x10000);
6239         if (priv->sram == NULL) {
6240                 wiphy_err(hw->wiphy, "Cannot map device SRAM\n");
6241                 rc = -EIO;
6242                 goto err_iounmap;
6243         }
6244
6245         /*
6246          * If BAR0 is a 32 bit BAR, the register BAR will be BAR1.
6247          * If BAR0 is a 64 bit BAR, the register BAR will be BAR2.
6248          */
6249         priv->regs = pci_iomap(pdev, 1, 0x10000);
6250         if (priv->regs == NULL) {
6251                 priv->regs = pci_iomap(pdev, 2, 0x10000);
6252                 if (priv->regs == NULL) {
6253                         wiphy_err(hw->wiphy, "Cannot map device registers\n");
6254                         rc = -EIO;
6255                         goto err_iounmap;
6256                 }
6257         }
6258
6259         /*
6260          * Choose the initial fw image depending on user input.  If a second
6261          * image is available, make it the alternative image that will be
6262          * loaded if the first one fails.
6263          */
6264         init_completion(&priv->firmware_loading_complete);
6265         di = priv->device_info;
6266         if (ap_mode_default && di->fw_image_ap) {
6267                 priv->fw_pref = di->fw_image_ap;
6268                 priv->fw_alt = di->fw_image_sta;
6269         } else if (!ap_mode_default && di->fw_image_sta) {
6270                 priv->fw_pref = di->fw_image_sta;
6271                 priv->fw_alt = di->fw_image_ap;
6272         } else if (ap_mode_default && !di->fw_image_ap && di->fw_image_sta) {
6273                 printk(KERN_WARNING "AP fw is unavailable.  Using STA fw.");
6274                 priv->fw_pref = di->fw_image_sta;
6275         } else if (!ap_mode_default && !di->fw_image_sta && di->fw_image_ap) {
6276                 printk(KERN_WARNING "STA fw is unavailable.  Using AP fw.");
6277                 priv->fw_pref = di->fw_image_ap;
6278         }
6279         rc = mwl8k_init_firmware(hw, priv->fw_pref, true);
6280         if (rc)
6281                 goto err_stop_firmware;
6282
6283         priv->hw_restart_in_progress = false;
6284
6285         priv->running_bsses = 0;
6286
6287         return rc;
6288
6289 err_stop_firmware:
6290         mwl8k_hw_reset(priv);
6291
6292 err_iounmap:
6293         if (priv->regs != NULL)
6294                 pci_iounmap(pdev, priv->regs);
6295
6296         if (priv->sram != NULL)
6297                 pci_iounmap(pdev, priv->sram);
6298
6299         ieee80211_free_hw(hw);
6300
6301 err_free_reg:
6302         pci_release_regions(pdev);
6303
6304 err_disable_device:
6305         pci_disable_device(pdev);
6306
6307         return rc;
6308 }
6309
6310 static void mwl8k_remove(struct pci_dev *pdev)
6311 {
6312         struct ieee80211_hw *hw = pci_get_drvdata(pdev);
6313         struct mwl8k_priv *priv;
6314         int i;
6315
6316         if (hw == NULL)
6317                 return;
6318         priv = hw->priv;
6319
6320         wait_for_completion(&priv->firmware_loading_complete);
6321
6322         if (priv->fw_state == FW_STATE_ERROR) {
6323                 mwl8k_hw_reset(priv);
6324                 goto unmap;
6325         }
6326
6327         ieee80211_stop_queues(hw);
6328
6329         ieee80211_unregister_hw(hw);
6330
6331         /* Remove TX reclaim and RX tasklets.  */
6332         tasklet_kill(&priv->poll_tx_task);
6333         tasklet_kill(&priv->poll_rx_task);
6334
6335         /* Stop hardware */
6336         mwl8k_hw_reset(priv);
6337
6338         /* Return all skbs to mac80211 */
6339         for (i = 0; i < mwl8k_tx_queues(priv); i++)
6340                 mwl8k_txq_reclaim(hw, i, INT_MAX, 1);
6341
6342         for (i = 0; i < mwl8k_tx_queues(priv); i++)
6343                 mwl8k_txq_deinit(hw, i);
6344
6345         mwl8k_rxq_deinit(hw, 0);
6346
6347         dma_free_coherent(&priv->pdev->dev, 4, priv->cookie, priv->cookie_dma);
6348
6349 unmap:
6350         pci_iounmap(pdev, priv->regs);
6351         pci_iounmap(pdev, priv->sram);
6352         ieee80211_free_hw(hw);
6353         pci_release_regions(pdev);
6354         pci_disable_device(pdev);
6355 }
6356
6357 static struct pci_driver mwl8k_driver = {
6358         .name           = MWL8K_NAME,
6359         .id_table       = mwl8k_pci_id_table,
6360         .probe          = mwl8k_probe,
6361         .remove         = mwl8k_remove,
6362 };
6363
6364 module_pci_driver(mwl8k_driver);
6365
6366 MODULE_DESCRIPTION(MWL8K_DESC);
6367 MODULE_VERSION(MWL8K_VERSION);
6368 MODULE_AUTHOR("Lennert Buytenhek <buytenh@marvell.com>");
6369 MODULE_LICENSE("GPL");