drivers/net/wireless/mwl8k.c

   1 /*
   2  * drivers/net/wireless/mwl8k.c
   3  * Driver for Marvell TOPDOG 802.11 Wireless cards
   4  *
   5  * Copyright (C) 2008, 2009, 2010 Marvell Semiconductor Inc.
   6  *
   7  * This file is licensed under the terms of the GNU General Public
   8  * License version 2.  This program is licensed "as is" without any
   9  * warranty of any kind, whether express or implied.
  10  */
  11
  12 #include <linux/init.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/module.h>
  15 #include <linux/kernel.h>
  16 #include <linux/sched.h>
  17 #include <linux/spinlock.h>
  18 #include <linux/list.h>
  19 #include <linux/pci.h>
  20 #include <linux/delay.h>
  21 #include <linux/completion.h>
  22 #include <linux/etherdevice.h>
  23 #include <linux/slab.h>
  24 #include <net/mac80211.h>
  25 #include <linux/moduleparam.h>
  26 #include <linux/firmware.h>
  27 #include <linux/workqueue.h>
  28
  29 #define MWL8K_DESC      "Marvell TOPDOG(R) 802.11 Wireless Network Driver"
  30 #define MWL8K_NAME      KBUILD_MODNAME
  31 #define MWL8K_VERSION   "0.13"
  32
  33 /* Module parameters */
  34 static bool ap_mode_default;
  35 module_param(ap_mode_default, bool, 0);
  36 MODULE_PARM_DESC(ap_mode_default,
  37                  "Set to 1 to make ap mode the default instead of sta mode");
  38
  39 /* Register definitions */
  40 #define MWL8K_HIU_GEN_PTR                       0x00000c10
  41 #define  MWL8K_MODE_STA                          0x0000005a
  42 #define  MWL8K_MODE_AP                           0x000000a5
  43 #define MWL8K_HIU_INT_CODE                      0x00000c14
  44 #define  MWL8K_FWSTA_READY                       0xf0f1f2f4
  45 #define  MWL8K_FWAP_READY                        0xf1f2f4a5
  46 #define  MWL8K_INT_CODE_CMD_FINISHED             0x00000005
  47 #define MWL8K_HIU_SCRATCH                       0x00000c40
  48
  49 /* Host->device communications */
  50 #define MWL8K_HIU_H2A_INTERRUPT_EVENTS          0x00000c18
  51 #define MWL8K_HIU_H2A_INTERRUPT_STATUS          0x00000c1c
  52 #define MWL8K_HIU_H2A_INTERRUPT_MASK            0x00000c20
  53 #define MWL8K_HIU_H2A_INTERRUPT_CLEAR_SEL       0x00000c24
  54 #define MWL8K_HIU_H2A_INTERRUPT_STATUS_MASK     0x00000c28
  55 #define  MWL8K_H2A_INT_DUMMY                     (1 << 20)
  56 #define  MWL8K_H2A_INT_RESET                     (1 << 15)
  57 #define  MWL8K_H2A_INT_DOORBELL                  (1 << 1)
  58 #define  MWL8K_H2A_INT_PPA_READY                 (1 << 0)
  59
  60 /* Device->host communications */
  61 #define MWL8K_HIU_A2H_INTERRUPT_EVENTS          0x00000c2c
  62 #define MWL8K_HIU_A2H_INTERRUPT_STATUS          0x00000c30
  63 #define MWL8K_HIU_A2H_INTERRUPT_MASK            0x00000c34
  64 #define MWL8K_HIU_A2H_INTERRUPT_CLEAR_SEL       0x00000c38
  65 #define MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK     0x00000c3c
  66 #define  MWL8K_A2H_INT_DUMMY                     (1 << 20)
  67 #define  MWL8K_A2H_INT_BA_WATCHDOG               (1 << 14)
  68 #define  MWL8K_A2H_INT_CHNL_SWITCHED             (1 << 11)
  69 #define  MWL8K_A2H_INT_QUEUE_EMPTY               (1 << 10)
  70 #define  MWL8K_A2H_INT_RADAR_DETECT              (1 << 7)
  71 #define  MWL8K_A2H_INT_RADIO_ON                  (1 << 6)
  72 #define  MWL8K_A2H_INT_RADIO_OFF                 (1 << 5)
  73 #define  MWL8K_A2H_INT_MAC_EVENT                 (1 << 3)
  74 #define  MWL8K_A2H_INT_OPC_DONE                  (1 << 2)
  75 #define  MWL8K_A2H_INT_RX_READY                  (1 << 1)
  76 #define  MWL8K_A2H_INT_TX_DONE                   (1 << 0)
  77
  78 /* HW micro second timer register
  79  * located at offset 0xA600. This
  80  * will be used to timestamp tx
  81  * packets.
  82  */
  83
  84 #define MWL8K_HW_TIMER_REGISTER                 0x0000a600
  85
  86 #define MWL8K_A2H_EVENTS        (MWL8K_A2H_INT_DUMMY | \
  87                                  MWL8K_A2H_INT_CHNL_SWITCHED | \
  88                                  MWL8K_A2H_INT_QUEUE_EMPTY | \
  89                                  MWL8K_A2H_INT_RADAR_DETECT | \
  90                                  MWL8K_A2H_INT_RADIO_ON | \
  91                                  MWL8K_A2H_INT_RADIO_OFF | \
  92                                  MWL8K_A2H_INT_MAC_EVENT | \
  93                                  MWL8K_A2H_INT_OPC_DONE | \
  94                                  MWL8K_A2H_INT_RX_READY | \
  95                                  MWL8K_A2H_INT_TX_DONE | \
  96                                  MWL8K_A2H_INT_BA_WATCHDOG)
  97
  98 #define MWL8K_RX_QUEUES         1
  99 #define MWL8K_TX_WMM_QUEUES     4
 100 #define MWL8K_MAX_AMPDU_QUEUES  8
 101 #define MWL8K_MAX_TX_QUEUES     (MWL8K_TX_WMM_QUEUES + MWL8K_MAX_AMPDU_QUEUES)
 102 #define mwl8k_tx_queues(priv)   (MWL8K_TX_WMM_QUEUES + (priv)->num_ampdu_queues)
 103
 104 /* txpriorities are mapped with hw queues.
 105  * Each hw queue has a txpriority.
 106  */
 107 #define TOTAL_HW_TX_QUEUES      8
 108
 109 /* Each HW queue can have one AMPDU stream.
 110  * But, because one of the hw queue is reserved,
 111  * maximum AMPDU queues that can be created are
 112  * one short of total tx queues.
 113  */
 114 #define MWL8K_NUM_AMPDU_STREAMS (TOTAL_HW_TX_QUEUES - 1)
 115
 116 struct rxd_ops {
 117         int rxd_size;
 118         void (*rxd_init)(void *rxd, dma_addr_t next_dma_addr);
 119         void (*rxd_refill)(void *rxd, dma_addr_t addr, int len);
 120         int (*rxd_process)(void *rxd, struct ieee80211_rx_status *status,
 121                            __le16 *qos, s8 *noise);
 122 };
 123
 124 struct mwl8k_device_info {
 125         char *part_name;
 126         char *helper_image;
 127         char *fw_image_sta;
 128         char *fw_image_ap;
 129         struct rxd_ops *ap_rxd_ops;
 130         u32 fw_api_ap;
 131 };
 132
 133 struct mwl8k_rx_queue {
 134         int rxd_count;
 135
 136         /* hw receives here */
 137         int head;
 138
 139         /* refill descs here */
 140         int tail;
 141
 142         void *rxd;
 143         dma_addr_t rxd_dma;
 144         struct {
 145                 struct sk_buff *skb;
 146                 DEFINE_DMA_UNMAP_ADDR(dma);
 147         } *buf;
 148 };
 149
 150 struct mwl8k_tx_queue {
 151         /* hw transmits here */
 152         int head;
 153
 154         /* sw appends here */
 155         int tail;
 156
 157         unsigned int len;
 158         struct mwl8k_tx_desc *txd;
 159         dma_addr_t txd_dma;
 160         struct sk_buff **skb;
 161 };
 162
 163 enum {
 164         AMPDU_NO_STREAM,
 165         AMPDU_STREAM_NEW,
 166         AMPDU_STREAM_IN_PROGRESS,
 167         AMPDU_STREAM_ACTIVE,
 168 };
 169
 170 struct mwl8k_ampdu_stream {
 171         struct ieee80211_sta *sta;
 172         u8 tid;
 173         u8 state;
 174         u8 idx;
 175 };
 176
 177 struct mwl8k_priv {
 178         struct ieee80211_hw *hw;
 179         struct pci_dev *pdev;
 180         int irq;
 181
 182         struct mwl8k_device_info *device_info;
 183
 184         void __iomem *sram;
 185         void __iomem *regs;
 186
 187         /* firmware */
 188         const struct firmware *fw_helper;
 189         const struct firmware *fw_ucode;
 190
 191         /* hardware/firmware parameters */
 192         bool ap_fw;
 193         struct rxd_ops *rxd_ops;
 194         struct ieee80211_supported_band band_24;
 195         struct ieee80211_channel channels_24[14];
 196         struct ieee80211_rate rates_24[13];
 197         struct ieee80211_supported_band band_50;
 198         struct ieee80211_channel channels_50[4];
 199         struct ieee80211_rate rates_50[8];
 200         u32 ap_macids_supported;
 201         u32 sta_macids_supported;
 202
 203         /* Ampdu stream information */
 204         u8 num_ampdu_queues;
 205         spinlock_t stream_lock;
 206         struct mwl8k_ampdu_stream ampdu[MWL8K_MAX_AMPDU_QUEUES];
 207         struct work_struct watchdog_ba_handle;
 208
 209         /* firmware access */
 210         struct mutex fw_mutex;
 211         struct task_struct *fw_mutex_owner;
 212         struct task_struct *hw_restart_owner;
 213         int fw_mutex_depth;
 214         struct completion *hostcmd_wait;
 215
 216         atomic_t watchdog_event_pending;
 217
 218         /* lock held over TX and TX reap */
 219         spinlock_t tx_lock;
 220
 221         /* TX quiesce completion, protected by fw_mutex and tx_lock */
 222         struct completion *tx_wait;
 223
 224         /* List of interfaces.  */
 225         u32 macids_used;
 226         struct list_head vif_list;
 227
 228         /* power management status cookie from firmware */
 229         u32 *cookie;
 230         dma_addr_t cookie_dma;
 231
 232         u16 num_mcaddrs;
 233         u8 hw_rev;
 234         u32 fw_rev;
 235         u32 caps;
 236
 237         /*
 238          * Running count of TX packets in flight, to avoid
 239          * iterating over the transmit rings each time.
 240          */
 241         int pending_tx_pkts;
 242
 243         struct mwl8k_rx_queue rxq[MWL8K_RX_QUEUES];
 244         struct mwl8k_tx_queue txq[MWL8K_MAX_TX_QUEUES];
 245         u32 txq_offset[MWL8K_MAX_TX_QUEUES];
 246
 247         bool radio_on;
 248         bool radio_short_preamble;
 249         bool sniffer_enabled;
 250         bool wmm_enabled;
 251
 252         /* XXX need to convert this to handle multiple interfaces */
 253         bool capture_beacon;
 254         u8 capture_bssid[ETH_ALEN];
 255         struct sk_buff *beacon_skb;
 256
 257         /*
 258          * This FJ worker has to be global as it is scheduled from the
 259          * RX handler.  At this point we don't know which interface it
 260          * belongs to until the list of bssids waiting to complete join
 261          * is checked.
 262          */
 263         struct work_struct finalize_join_worker;
 264
 265         /* Tasklet to perform TX reclaim.  */
 266         struct tasklet_struct poll_tx_task;
 267
 268         /* Tasklet to perform RX.  */
 269         struct tasklet_struct poll_rx_task;
 270
 271         /* Most recently reported noise in dBm */
 272         s8 noise;
 273
 274         /*
 275          * preserve the queue configurations so they can be restored if/when
 276          * the firmware image is swapped.
 277          */
 278         struct ieee80211_tx_queue_params wmm_params[MWL8K_TX_WMM_QUEUES];
 279
 280         /* To perform the task of reloading the firmware */
 281         struct work_struct fw_reload;
 282         bool hw_restart_in_progress;
 283
 284         /* async firmware loading state */
 285         unsigned fw_state;
 286         char *fw_pref;
 287         char *fw_alt;
 288         bool is_8764;
 289         struct completion firmware_loading_complete;
 290
 291         /* bitmap of running BSSes */
 292         u32 running_bsses;
 293 };
 294
 295 #define MAX_WEP_KEY_LEN         13
 296 #define NUM_WEP_KEYS            4
 297
 298 /* Per interface specific private data */
 299 struct mwl8k_vif {
 300         struct list_head list;
 301         struct ieee80211_vif *vif;
 302
 303         /* Firmware macid for this vif.  */
 304         int macid;
 305
 306         /* Non AMPDU sequence number assigned by driver.  */
 307         u16 seqno;
 308
 309         /* Saved WEP keys */
 310         struct {
 311                 u8 enabled;
 312                 u8 key[sizeof(struct ieee80211_key_conf) + MAX_WEP_KEY_LEN];
 313         } wep_key_conf[NUM_WEP_KEYS];
 314
 315         /* BSSID */
 316         u8 bssid[ETH_ALEN];
 317
 318         /* A flag to indicate is HW crypto is enabled for this bssid */
 319         bool is_hw_crypto_enabled;
 320 };
 321 #define MWL8K_VIF(_vif) ((struct mwl8k_vif *)&((_vif)->drv_priv))
 322 #define IEEE80211_KEY_CONF(_u8) ((struct ieee80211_key_conf *)(_u8))
 323
 324 struct tx_traffic_info {
 325         u32 start_time;
 326         u32 pkts;
 327 };
 328
 329 #define MWL8K_MAX_TID 8
 330 struct mwl8k_sta {
 331         /* Index into station database. Returned by UPDATE_STADB.  */
 332         u8 peer_id;
 333         u8 is_ampdu_allowed;
 334         struct tx_traffic_info tx_stats[MWL8K_MAX_TID];
 335 };
 336 #define MWL8K_STA(_sta) ((struct mwl8k_sta *)&((_sta)->drv_priv))
 337
 338 static const struct ieee80211_channel mwl8k_channels_24[] = {
 339         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2412, .hw_value = 1, },
 340         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2417, .hw_value = 2, },
 341         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2422, .hw_value = 3, },
 342         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2427, .hw_value = 4, },
 343         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2432, .hw_value = 5, },
 344         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2437, .hw_value = 6, },
 345         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2442, .hw_value = 7, },
 346         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2447, .hw_value = 8, },
 347         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2452, .hw_value = 9, },
 348         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2457, .hw_value = 10, },
 349         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2462, .hw_value = 11, },
 350         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2467, .hw_value = 12, },
 351         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2472, .hw_value = 13, },
 352         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2484, .hw_value = 14, },
 353 };
 354
 355 static const struct ieee80211_rate mwl8k_rates_24[] = {
 356         { .bitrate = 10, .hw_value = 2, },
 357         { .bitrate = 20, .hw_value = 4, },
 358         { .bitrate = 55, .hw_value = 11, },
 359         { .bitrate = 110, .hw_value = 22, },
 360         { .bitrate = 220, .hw_value = 44, },
 361         { .bitrate = 60, .hw_value = 12, },
 362         { .bitrate = 90, .hw_value = 18, },
 363         { .bitrate = 120, .hw_value = 24, },
 364         { .bitrate = 180, .hw_value = 36, },
 365         { .bitrate = 240, .hw_value = 48, },
 366         { .bitrate = 360, .hw_value = 72, },
 367         { .bitrate = 480, .hw_value = 96, },
 368         { .bitrate = 540, .hw_value = 108, },
 369 };
 370
 371 static const struct ieee80211_channel mwl8k_channels_50[] = {
 372         { .band = IEEE80211_BAND_5GHZ, .center_freq = 5180, .hw_value = 36, },
 373         { .band = IEEE80211_BAND_5GHZ, .center_freq = 5200, .hw_value = 40, },
 374         { .band = IEEE80211_BAND_5GHZ, .center_freq = 5220, .hw_value = 44, },
 375         { .band = IEEE80211_BAND_5GHZ, .center_freq = 5240, .hw_value = 48, },
 376 };
 377
 378 static const struct ieee80211_rate mwl8k_rates_50[] = {
 379         { .bitrate = 60, .hw_value = 12, },
 380         { .bitrate = 90, .hw_value = 18, },
 381         { .bitrate = 120, .hw_value = 24, },
 382         { .bitrate = 180, .hw_value = 36, },
 383         { .bitrate = 240, .hw_value = 48, },
 384         { .bitrate = 360, .hw_value = 72, },
 385         { .bitrate = 480, .hw_value = 96, },
 386         { .bitrate = 540, .hw_value = 108, },
 387 };
 388
 389 /* Set or get info from Firmware */
 390 #define MWL8K_CMD_GET                   0x0000
 391 #define MWL8K_CMD_SET                   0x0001
 392 #define MWL8K_CMD_SET_LIST              0x0002
 393
 394 /* Firmware command codes */
 395 #define MWL8K_CMD_CODE_DNLD             0x0001
 396 #define MWL8K_CMD_GET_HW_SPEC           0x0003
 397 #define MWL8K_CMD_SET_HW_SPEC           0x0004
 398 #define MWL8K_CMD_MAC_MULTICAST_ADR     0x0010
 399 #define MWL8K_CMD_GET_STAT              0x0014
 400 #define MWL8K_CMD_RADIO_CONTROL         0x001c
 401 #define MWL8K_CMD_RF_TX_POWER           0x001e
 402 #define MWL8K_CMD_TX_POWER              0x001f
 403 #define MWL8K_CMD_RF_ANTENNA            0x0020
 404 #define MWL8K_CMD_SET_BEACON            0x0100          /* per-vif */
 405 #define MWL8K_CMD_SET_PRE_SCAN          0x0107
 406 #define MWL8K_CMD_SET_POST_SCAN         0x0108
 407 #define MWL8K_CMD_SET_RF_CHANNEL        0x010a
 408 #define MWL8K_CMD_SET_AID               0x010d
 409 #define MWL8K_CMD_SET_RATE              0x0110
 410 #define MWL8K_CMD_SET_FINALIZE_JOIN     0x0111
 411 #define MWL8K_CMD_RTS_THRESHOLD         0x0113
 412 #define MWL8K_CMD_SET_SLOT              0x0114
 413 #define MWL8K_CMD_SET_EDCA_PARAMS       0x0115
 414 #define MWL8K_CMD_SET_WMM_MODE          0x0123
 415 #define MWL8K_CMD_MIMO_CONFIG           0x0125
 416 #define MWL8K_CMD_USE_FIXED_RATE        0x0126
 417 #define MWL8K_CMD_ENABLE_SNIFFER        0x0150
 418 #define MWL8K_CMD_SET_MAC_ADDR          0x0202          /* per-vif */
 419 #define MWL8K_CMD_SET_RATEADAPT_MODE    0x0203
 420 #define MWL8K_CMD_GET_WATCHDOG_BITMAP   0x0205
 421 #define MWL8K_CMD_DEL_MAC_ADDR          0x0206          /* per-vif */
 422 #define MWL8K_CMD_BSS_START             0x1100          /* per-vif */
 423 #define MWL8K_CMD_SET_NEW_STN           0x1111          /* per-vif */
 424 #define MWL8K_CMD_UPDATE_ENCRYPTION     0x1122          /* per-vif */
 425 #define MWL8K_CMD_UPDATE_STADB          0x1123
 426 #define MWL8K_CMD_BASTREAM              0x1125
 427
 428 static const char *mwl8k_cmd_name(__le16 cmd, char *buf, int bufsize)
 429 {
 430         u16 command = le16_to_cpu(cmd);
 431
 432 #define MWL8K_CMDNAME(x)        case MWL8K_CMD_##x: do {\
 433                                         snprintf(buf, bufsize, "%s", #x);\
 434                                         return buf;\
 435                                         } while (0)
 436         switch (command & ~0x8000) {
 437                 MWL8K_CMDNAME(CODE_DNLD);
 438                 MWL8K_CMDNAME(GET_HW_SPEC);
 439                 MWL8K_CMDNAME(SET_HW_SPEC);
 440                 MWL8K_CMDNAME(MAC_MULTICAST_ADR);
 441                 MWL8K_CMDNAME(GET_STAT);
 442                 MWL8K_CMDNAME(RADIO_CONTROL);
 443                 MWL8K_CMDNAME(RF_TX_POWER);
 444                 MWL8K_CMDNAME(TX_POWER);
 445                 MWL8K_CMDNAME(RF_ANTENNA);
 446                 MWL8K_CMDNAME(SET_BEACON);
 447                 MWL8K_CMDNAME(SET_PRE_SCAN);
 448                 MWL8K_CMDNAME(SET_POST_SCAN);
 449                 MWL8K_CMDNAME(SET_RF_CHANNEL);
 450                 MWL8K_CMDNAME(SET_AID);
 451                 MWL8K_CMDNAME(SET_RATE);
 452                 MWL8K_CMDNAME(SET_FINALIZE_JOIN);
 453                 MWL8K_CMDNAME(RTS_THRESHOLD);
 454                 MWL8K_CMDNAME(SET_SLOT);
 455                 MWL8K_CMDNAME(SET_EDCA_PARAMS);
 456                 MWL8K_CMDNAME(SET_WMM_MODE);
 457                 MWL8K_CMDNAME(MIMO_CONFIG);
 458                 MWL8K_CMDNAME(USE_FIXED_RATE);
 459                 MWL8K_CMDNAME(ENABLE_SNIFFER);
 460                 MWL8K_CMDNAME(SET_MAC_ADDR);
 461                 MWL8K_CMDNAME(SET_RATEADAPT_MODE);
 462                 MWL8K_CMDNAME(BSS_START);
 463                 MWL8K_CMDNAME(SET_NEW_STN);
 464                 MWL8K_CMDNAME(UPDATE_ENCRYPTION);
 465                 MWL8K_CMDNAME(UPDATE_STADB);
 466                 MWL8K_CMDNAME(BASTREAM);
 467                 MWL8K_CMDNAME(GET_WATCHDOG_BITMAP);
 468         default:
 469                 snprintf(buf, bufsize, "0x%x", cmd);
 470         }
 471 #undef MWL8K_CMDNAME
 472
 473         return buf;
 474 }
 475
 476 /* Hardware and firmware reset */
 477 static void mwl8k_hw_reset(struct mwl8k_priv *priv)
 478 {
 479         iowrite32(MWL8K_H2A_INT_RESET,
 480                 priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
 481         iowrite32(MWL8K_H2A_INT_RESET,
 482                 priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
 483         msleep(20);
 484 }
 485
 486 /* Release fw image */
 487 static void mwl8k_release_fw(const struct firmware **fw)
 488 {
 489         if (*fw == NULL)
 490                 return;
 491         release_firmware(*fw);
 492         *fw = NULL;
 493 }
 494
 495 static void mwl8k_release_firmware(struct mwl8k_priv *priv)
 496 {
 497         mwl8k_release_fw(&priv->fw_ucode);
 498         mwl8k_release_fw(&priv->fw_helper);
 499 }
 500
 501 /* states for asynchronous f/w loading */
 502 static void mwl8k_fw_state_machine(const struct firmware *fw, void *context);
 503 enum {
 504         FW_STATE_INIT = 0,
 505         FW_STATE_LOADING_PREF,
 506         FW_STATE_LOADING_ALT,
 507         FW_STATE_ERROR,
 508 };
 509
 510 /* Request fw image */
 511 static int mwl8k_request_fw(struct mwl8k_priv *priv,
 512                             const char *fname, const struct firmware **fw,
 513                             bool nowait)
 514 {
 515         /* release current image */
 516         if (*fw != NULL)
 517                 mwl8k_release_fw(fw);
 518
 519         if (nowait)
 520                 return request_firmware_nowait(THIS_MODULE, 1, fname,
 521                                                &priv->pdev->dev, GFP_KERNEL,
 522                                                priv, mwl8k_fw_state_machine);
 523         else
 524                 return request_firmware(fw, fname, &priv->pdev->dev);
 525 }
 526
 527 static int mwl8k_request_firmware(struct mwl8k_priv *priv, char *fw_image,
 528                                   bool nowait)
 529 {
 530         struct mwl8k_device_info *di = priv->device_info;
 531         int rc;
 532
 533         if (di->helper_image != NULL) {
 534                 if (nowait)
 535                         rc = mwl8k_request_fw(priv, di->helper_image,
 536                                               &priv->fw_helper, true);
 537                 else
 538                         rc = mwl8k_request_fw(priv, di->helper_image,
 539                                               &priv->fw_helper, false);
 540                 if (rc)
 541                         printk(KERN_ERR "%s: Error requesting helper fw %s\n",
 542                                pci_name(priv->pdev), di->helper_image);
 543
 544                 if (rc || nowait)
 545                         return rc;
 546         }
 547
 548         if (nowait) {
 549                 /*
 550                  * if we get here, no helper image is needed.  Skip the
 551                  * FW_STATE_INIT state.
 552                  */
 553                 priv->fw_state = FW_STATE_LOADING_PREF;
 554                 rc = mwl8k_request_fw(priv, fw_image,
 555                                       &priv->fw_ucode,
 556                                       true);
 557         } else
 558                 rc = mwl8k_request_fw(priv, fw_image,
 559                                       &priv->fw_ucode, false);
 560         if (rc) {
 561                 printk(KERN_ERR "%s: Error requesting firmware file %s\n",
 562                        pci_name(priv->pdev), fw_image);
 563                 mwl8k_release_fw(&priv->fw_helper);
 564                 return rc;
 565         }
 566
 567         return 0;
 568 }
 569
 570 struct mwl8k_cmd_pkt {
 571         __le16  code;
 572         __le16  length;
 573         __u8    seq_num;
 574         __u8    macid;
 575         __le16  result;
 576         char    payload[0];
 577 } __packed;
 578
 579 /*
 580  * Firmware loading.
 581  */
 582 static int
 583 mwl8k_send_fw_load_cmd(struct mwl8k_priv *priv, void *data, int length)
 584 {
 585         void __iomem *regs = priv->regs;
 586         dma_addr_t dma_addr;
 587         int loops;
 588
 589         dma_addr = pci_map_single(priv->pdev, data, length, PCI_DMA_TODEVICE);
 590         if (pci_dma_mapping_error(priv->pdev, dma_addr))
 591                 return -ENOMEM;
 592
 593         iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR);
 594         iowrite32(0, regs + MWL8K_HIU_INT_CODE);
 595         iowrite32(MWL8K_H2A_INT_DOORBELL,
 596                 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
 597         iowrite32(MWL8K_H2A_INT_DUMMY,
 598                 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
 599
 600         loops = 1000;
 601         do {
 602                 u32 int_code;
 603                 if (priv->is_8764) {
 604                         int_code = ioread32(regs +
 605                                             MWL8K_HIU_H2A_INTERRUPT_STATUS);
 606                         if (int_code == 0)
 607                                 break;
 608                 } else {
 609                         int_code = ioread32(regs + MWL8K_HIU_INT_CODE);
 610                         if (int_code == MWL8K_INT_CODE_CMD_FINISHED) {
 611                                 iowrite32(0, regs + MWL8K_HIU_INT_CODE);
 612                                 break;
 613                         }
 614                 }
 615                 cond_resched();
 616                 udelay(1);
 617         } while (--loops);
 618
 619         pci_unmap_single(priv->pdev, dma_addr, length, PCI_DMA_TODEVICE);
 620
 621         return loops ? 0 : -ETIMEDOUT;
 622 }
 623
 624 static int mwl8k_load_fw_image(struct mwl8k_priv *priv,
 625                                 const u8 *data, size_t length)
 626 {
 627         struct mwl8k_cmd_pkt *cmd;
 628         int done;
 629         int rc = 0;
 630
 631         cmd = kmalloc(sizeof(*cmd) + 256, GFP_KERNEL);
 632         if (cmd == NULL)
 633                 return -ENOMEM;
 634
 635         cmd->code = cpu_to_le16(MWL8K_CMD_CODE_DNLD);
 636         cmd->seq_num = 0;
 637         cmd->macid = 0;
 638         cmd->result = 0;
 639
 640         done = 0;
 641         while (length) {
 642                 int block_size = length > 256 ? 256 : length;
 643
 644                 memcpy(cmd->payload, data + done, block_size);
 645                 cmd->length = cpu_to_le16(block_size);
 646
 647                 rc = mwl8k_send_fw_load_cmd(priv, cmd,
 648                                                 sizeof(*cmd) + block_size);
 649                 if (rc)
 650                         break;
 651
 652                 done += block_size;
 653                 length -= block_size;
 654         }
 655
 656         if (!rc) {
 657                 cmd->length = 0;
 658                 rc = mwl8k_send_fw_load_cmd(priv, cmd, sizeof(*cmd));
 659         }
 660
 661         kfree(cmd);
 662
 663         return rc;
 664 }
 665
 666 static int mwl8k_feed_fw_image(struct mwl8k_priv *priv,
 667                                 const u8 *data, size_t length)
 668 {
 669         unsigned char *buffer;
 670         int may_continue, rc = 0;
 671         u32 done, prev_block_size;
 672
 673         buffer = kmalloc(1024, GFP_KERNEL);
 674         if (buffer == NULL)
 675                 return -ENOMEM;
 676
 677         done = 0;
 678         prev_block_size = 0;
 679         may_continue = 1000;
 680         while (may_continue > 0) {
 681                 u32 block_size;
 682
 683                 block_size = ioread32(priv->regs + MWL8K_HIU_SCRATCH);
 684                 if (block_size & 1) {
 685                         block_size &= ~1;
 686                         may_continue--;
 687                 } else {
 688                         done += prev_block_size;
 689                         length -= prev_block_size;
 690                 }
 691
 692                 if (block_size > 1024 || block_size > length) {
 693                         rc = -EOVERFLOW;
 694                         break;
 695                 }
 696
 697                 if (length == 0) {
 698                         rc = 0;
 699                         break;
 700                 }
 701
 702                 if (block_size == 0) {
 703                         rc = -EPROTO;
 704                         may_continue--;
 705                         udelay(1);
 706                         continue;
 707                 }
 708
 709                 prev_block_size = block_size;
 710                 memcpy(buffer, data + done, block_size);
 711
 712                 rc = mwl8k_send_fw_load_cmd(priv, buffer, block_size);
 713                 if (rc)
 714                         break;
 715         }
 716
 717         if (!rc && length != 0)
 718                 rc = -EREMOTEIO;
 719
 720         kfree(buffer);
 721
 722         return rc;
 723 }
 724
 725 static int mwl8k_load_firmware(struct ieee80211_hw *hw)
 726 {
 727         struct mwl8k_priv *priv = hw->priv;
 728         const struct firmware *fw = priv->fw_ucode;
 729         int rc;
 730         int loops;
 731
 732         if (!memcmp(fw->data, "\x01\x00\x00\x00", 4) && !priv->is_8764) {
 733                 const struct firmware *helper = priv->fw_helper;
 734
 735                 if (helper == NULL) {
 736                         printk(KERN_ERR "%s: helper image needed but none "
 737                                "given\n", pci_name(priv->pdev));
 738                         return -EINVAL;
 739                 }
 740
 741                 rc = mwl8k_load_fw_image(priv, helper->data, helper->size);
 742                 if (rc) {
 743                         printk(KERN_ERR "%s: unable to load firmware "
 744                                "helper image\n", pci_name(priv->pdev));
 745                         return rc;
 746                 }
 747                 msleep(20);
 748
 749                 rc = mwl8k_feed_fw_image(priv, fw->data, fw->size);
 750         } else {
 751                 if (priv->is_8764)
 752                         rc = mwl8k_feed_fw_image(priv, fw->data, fw->size);
 753                 else
 754                         rc = mwl8k_load_fw_image(priv, fw->data, fw->size);
 755         }
 756
 757         if (rc) {
 758                 printk(KERN_ERR "%s: unable to load firmware image\n",
 759                        pci_name(priv->pdev));
 760                 return rc;
 761         }
 762
 763         iowrite32(MWL8K_MODE_STA, priv->regs + MWL8K_HIU_GEN_PTR);
 764
 765         loops = 500000;
 766         do {
 767                 u32 ready_code;
 768
 769                 ready_code = ioread32(priv->regs + MWL8K_HIU_INT_CODE);
 770                 if (ready_code == MWL8K_FWAP_READY) {
 771                         priv->ap_fw = true;
 772                         break;
 773                 } else if (ready_code == MWL8K_FWSTA_READY) {
 774                         priv->ap_fw = false;
 775                         break;
 776                 }
 777
 778                 cond_resched();
 779                 udelay(1);
 780         } while (--loops);
 781
 782         return loops ? 0 : -ETIMEDOUT;
 783 }
 784
 785
 786 /* DMA header used by firmware and hardware.  */
 787 struct mwl8k_dma_data {
 788         __le16 fwlen;
 789         struct ieee80211_hdr wh;
 790         char data[0];
 791 } __packed;
 792
 793 /* Routines to add/remove DMA header from skb.  */
 794 static inline void mwl8k_remove_dma_header(struct sk_buff *skb, __le16 qos)
 795 {
 796         struct mwl8k_dma_data *tr;
 797         int hdrlen;
 798
 799         tr = (struct mwl8k_dma_data *)skb->data;
 800         hdrlen = ieee80211_hdrlen(tr->wh.frame_control);
 801
 802         if (hdrlen != sizeof(tr->wh)) {
 803                 if (ieee80211_is_data_qos(tr->wh.frame_control)) {
 804                         memmove(tr->data - hdrlen, &tr->wh, hdrlen - 2);
 805                         *((__le16 *)(tr->data - 2)) = qos;
 806                 } else {
 807                         memmove(tr->data - hdrlen, &tr->wh, hdrlen);
 808                 }
 809         }
 810
 811         if (hdrlen != sizeof(*tr))
 812                 skb_pull(skb, sizeof(*tr) - hdrlen);
 813 }
 814
 815 #define REDUCED_TX_HEADROOM     8
 816
 817 static void
 818 mwl8k_add_dma_header(struct mwl8k_priv *priv, struct sk_buff *skb,
 819                                                 int head_pad, int tail_pad)
 820 {
 821         struct ieee80211_hdr *wh;
 822         int hdrlen;
 823         int reqd_hdrlen;
 824         struct mwl8k_dma_data *tr;
 825
 826         /*
 827          * Add a firmware DMA header; the firmware requires that we
 828          * present a 2-byte payload length followed by a 4-address
 829          * header (without QoS field), followed (optionally) by any
 830          * WEP/ExtIV header (but only filled in for CCMP).
 831          */
 832         wh = (struct ieee80211_hdr *)skb->data;
 833
 834         hdrlen = ieee80211_hdrlen(wh->frame_control);
 835
 836         /*
 837          * Check if skb_resize is required because of
 838          * tx_headroom adjustment.
 839          */
 840         if (priv->ap_fw && (hdrlen < (sizeof(struct ieee80211_cts)
 841                                                 + REDUCED_TX_HEADROOM))) {
 842                 if (pskb_expand_head(skb, REDUCED_TX_HEADROOM, 0, GFP_ATOMIC)) {
 843
 844                         wiphy_err(priv->hw->wiphy,
 845                                         "Failed to reallocate TX buffer\n");
 846                         return;
 847                 }
 848                 skb->truesize += REDUCED_TX_HEADROOM;
 849         }
 850
 851         reqd_hdrlen = sizeof(*tr) + head_pad;
 852
 853         if (hdrlen != reqd_hdrlen)
 854                 skb_push(skb, reqd_hdrlen - hdrlen);
 855
 856         if (ieee80211_is_data_qos(wh->frame_control))
 857                 hdrlen -= IEEE80211_QOS_CTL_LEN;
 858
 859         tr = (struct mwl8k_dma_data *)skb->data;
 860         if (wh != &tr->wh)
 861                 memmove(&tr->wh, wh, hdrlen);
 862         if (hdrlen != sizeof(tr->wh))
 863                 memset(((void *)&tr->wh) + hdrlen, 0, sizeof(tr->wh) - hdrlen);
 864
 865         /*
 866          * Firmware length is the length of the fully formed "802.11
 867          * payload".  That is, everything except for the 802.11 header.
 868          * This includes all crypto material including the MIC.
 869          */
 870         tr->fwlen = cpu_to_le16(skb->len - sizeof(*tr) + tail_pad);
 871 }
 872
 873 static void mwl8k_encapsulate_tx_frame(struct mwl8k_priv *priv,
 874                 struct sk_buff *skb)
 875 {
 876         struct ieee80211_hdr *wh;
 877         struct ieee80211_tx_info *tx_info;
 878         struct ieee80211_key_conf *key_conf;
 879         int data_pad;
 880         int head_pad = 0;
 881
 882         wh = (struct ieee80211_hdr *)skb->data;
 883
 884         tx_info = IEEE80211_SKB_CB(skb);
 885
 886         key_conf = NULL;
 887         if (ieee80211_is_data(wh->frame_control))
 888                 key_conf = tx_info->control.hw_key;
 889
 890         /*
 891          * Make sure the packet header is in the DMA header format (4-address
 892          * without QoS), and add head & tail padding when HW crypto is enabled.
 893          *
 894          * We have the following trailer padding requirements:
 895          * - WEP: 4 trailer bytes (ICV)
 896          * - TKIP: 12 trailer bytes (8 MIC + 4 ICV)
 897          * - CCMP: 8 trailer bytes (MIC)
 898          */
 899         data_pad = 0;
 900         if (key_conf != NULL) {
 901                 head_pad = key_conf->iv_len;
 902                 switch (key_conf->cipher) {
 903                 case WLAN_CIPHER_SUITE_WEP40:
 904                 case WLAN_CIPHER_SUITE_WEP104:
 905                         data_pad = 4;
 906                         break;
 907                 case WLAN_CIPHER_SUITE_TKIP:
 908                         data_pad = 12;
 909                         break;
 910                 case WLAN_CIPHER_SUITE_CCMP:
 911                         data_pad = 8;
 912                         break;
 913                 }
 914         }
 915         mwl8k_add_dma_header(priv, skb, head_pad, data_pad);
 916 }
 917
 918 /*
 919  * Packet reception for 88w8366/88w8764 AP firmware.
 920  */
 921 struct mwl8k_rxd_ap {
 922         __le16 pkt_len;
 923         __u8 sq2;
 924         __u8 rate;
 925         __le32 pkt_phys_addr;
 926         __le32 next_rxd_phys_addr;
 927         __le16 qos_control;
 928         __le16 htsig2;
 929         __le32 hw_rssi_info;
 930         __le32 hw_noise_floor_info;
 931         __u8 noise_floor;
 932         __u8 pad0[3];
 933         __u8 rssi;
 934         __u8 rx_status;
 935         __u8 channel;
 936         __u8 rx_ctrl;
 937 } __packed;
 938
 939 #define MWL8K_AP_RATE_INFO_MCS_FORMAT           0x80
 940 #define MWL8K_AP_RATE_INFO_40MHZ                0x40
 941 #define MWL8K_AP_RATE_INFO_RATEID(x)            ((x) & 0x3f)
 942
 943 #define MWL8K_AP_RX_CTRL_OWNED_BY_HOST          0x80
 944
 945 /* 8366/8764 AP rx_status bits */
 946 #define MWL8K_AP_RXSTAT_DECRYPT_ERR_MASK                0x80
 947 #define MWL8K_AP_RXSTAT_GENERAL_DECRYPT_ERR             0xFF
 948 #define MWL8K_AP_RXSTAT_TKIP_DECRYPT_MIC_ERR            0x02
 949 #define MWL8K_AP_RXSTAT_WEP_DECRYPT_ICV_ERR             0x04
 950 #define MWL8K_AP_RXSTAT_TKIP_DECRYPT_ICV_ERR            0x08
 951
 952 static void mwl8k_rxd_ap_init(void *_rxd, dma_addr_t next_dma_addr)
 953 {
 954         struct mwl8k_rxd_ap *rxd = _rxd;
 955
 956         rxd->next_rxd_phys_addr = cpu_to_le32(next_dma_addr);
 957         rxd->rx_ctrl = MWL8K_AP_RX_CTRL_OWNED_BY_HOST;
 958 }
 959
 960 static void mwl8k_rxd_ap_refill(void *_rxd, dma_addr_t addr, int len)
 961 {
 962         struct mwl8k_rxd_ap *rxd = _rxd;
 963
 964         rxd->pkt_len = cpu_to_le16(len);
 965         rxd->pkt_phys_addr = cpu_to_le32(addr);
 966         wmb();
 967         rxd->rx_ctrl = 0;
 968 }
 969
 970 static int
 971 mwl8k_rxd_ap_process(void *_rxd, struct ieee80211_rx_status *status,
 972                      __le16 *qos, s8 *noise)
 973 {
 974         struct mwl8k_rxd_ap *rxd = _rxd;
 975
 976         if (!(rxd->rx_ctrl & MWL8K_AP_RX_CTRL_OWNED_BY_HOST))
 977                 return -1;
 978         rmb();
 979
 980         memset(status, 0, sizeof(*status));
 981
 982         status->signal = -rxd->rssi;
 983         *noise = -rxd->noise_floor;
 984
 985         if (rxd->rate & MWL8K_AP_RATE_INFO_MCS_FORMAT) {
 986                 status->flag |= RX_FLAG_HT;
 987                 if (rxd->rate & MWL8K_AP_RATE_INFO_40MHZ)
 988                         status->flag |= RX_FLAG_40MHZ;
 989                 status->rate_idx = MWL8K_AP_RATE_INFO_RATEID(rxd->rate);
 990         } else {
 991                 int i;
 992
 993                 for (i = 0; i < ARRAY_SIZE(mwl8k_rates_24); i++) {
 994                         if (mwl8k_rates_24[i].hw_value == rxd->rate) {
 995                                 status->rate_idx = i;
 996                                 break;
 997                         }
 998                 }
 999         }
1000
1001         if (rxd->channel > 14) {
1002                 status->band = IEEE80211_BAND_5GHZ;
1003                 if (!(status->flag & RX_FLAG_HT))
1004                         status->rate_idx -= 5;
1005         } else {
1006                 status->band = IEEE80211_BAND_2GHZ;
1007         }
1008         status->freq = ieee80211_channel_to_frequency(rxd->channel,
1009                                                       status->band);
1010
1011         *qos = rxd->qos_control;
1012
1013         if ((rxd->rx_status != MWL8K_AP_RXSTAT_GENERAL_DECRYPT_ERR) &&
1014             (rxd->rx_status & MWL8K_AP_RXSTAT_DECRYPT_ERR_MASK) &&
1015             (rxd->rx_status & MWL8K_AP_RXSTAT_TKIP_DECRYPT_MIC_ERR))
1016                 status->flag |= RX_FLAG_MMIC_ERROR;
1017
1018         return le16_to_cpu(rxd->pkt_len);
1019 }
1020
1021 static struct rxd_ops rxd_ap_ops = {
1022         .rxd_size       = sizeof(struct mwl8k_rxd_ap),
1023         .rxd_init       = mwl8k_rxd_ap_init,
1024         .rxd_refill     = mwl8k_rxd_ap_refill,
1025         .rxd_process    = mwl8k_rxd_ap_process,
1026 };
1027
1028 /*
1029  * Packet reception for STA firmware.
1030  */
1031 struct mwl8k_rxd_sta {
1032         __le16 pkt_len;
1033         __u8 link_quality;
1034         __u8 noise_level;
1035         __le32 pkt_phys_addr;
1036         __le32 next_rxd_phys_addr;
1037         __le16 qos_control;
1038         __le16 rate_info;
1039         __le32 pad0[4];
1040         __u8 rssi;
1041         __u8 channel;
1042         __le16 pad1;
1043         __u8 rx_ctrl;
1044         __u8 rx_status;
1045         __u8 pad2[2];
1046 } __packed;
1047
1048 #define MWL8K_STA_RATE_INFO_SHORTPRE            0x8000
1049 #define MWL8K_STA_RATE_INFO_ANTSELECT(x)        (((x) >> 11) & 0x3)
1050 #define MWL8K_STA_RATE_INFO_RATEID(x)           (((x) >> 3) & 0x3f)
1051 #define MWL8K_STA_RATE_INFO_40MHZ               0x0004
1052 #define MWL8K_STA_RATE_INFO_SHORTGI             0x0002
1053 #define MWL8K_STA_RATE_INFO_MCS_FORMAT          0x0001
1054
1055 #define MWL8K_STA_RX_CTRL_OWNED_BY_HOST         0x02
1056 #define MWL8K_STA_RX_CTRL_DECRYPT_ERROR         0x04
1057 /* ICV=0 or MIC=1 */
1058 #define MWL8K_STA_RX_CTRL_DEC_ERR_TYPE          0x08
1059 /* Key is uploaded only in failure case */
1060 #define MWL8K_STA_RX_CTRL_KEY_INDEX                     0x30
1061
1062 static void mwl8k_rxd_sta_init(void *_rxd, dma_addr_t next_dma_addr)
1063 {
1064         struct mwl8k_rxd_sta *rxd = _rxd;
1065
1066         rxd->next_rxd_phys_addr = cpu_to_le32(next_dma_addr);
1067         rxd->rx_ctrl = MWL8K_STA_RX_CTRL_OWNED_BY_HOST;
1068 }
1069
1070 static void mwl8k_rxd_sta_refill(void *_rxd, dma_addr_t addr, int len)
1071 {
1072         struct mwl8k_rxd_sta *rxd = _rxd;
1073
1074         rxd->pkt_len = cpu_to_le16(len);
1075         rxd->pkt_phys_addr = cpu_to_le32(addr);
1076         wmb();
1077         rxd->rx_ctrl = 0;
1078 }
1079
1080 static int
1081 mwl8k_rxd_sta_process(void *_rxd, struct ieee80211_rx_status *status,
1082                        __le16 *qos, s8 *noise)
1083 {
1084         struct mwl8k_rxd_sta *rxd = _rxd;
1085         u16 rate_info;
1086
1087         if (!(rxd->rx_ctrl & MWL8K_STA_RX_CTRL_OWNED_BY_HOST))
1088                 return -1;
1089         rmb();
1090
1091         rate_info = le16_to_cpu(rxd->rate_info);
1092
1093         memset(status, 0, sizeof(*status));
1094
1095         status->signal = -rxd->rssi;
1096         *noise = -rxd->noise_level;
1097         status->antenna = MWL8K_STA_RATE_INFO_ANTSELECT(rate_info);
1098         status->rate_idx = MWL8K_STA_RATE_INFO_RATEID(rate_info);
1099
1100         if (rate_info & MWL8K_STA_RATE_INFO_SHORTPRE)
1101                 status->flag |= RX_FLAG_SHORTPRE;
1102         if (rate_info & MWL8K_STA_RATE_INFO_40MHZ)
1103                 status->flag |= RX_FLAG_40MHZ;
1104         if (rate_info & MWL8K_STA_RATE_INFO_SHORTGI)
1105                 status->flag |= RX_FLAG_SHORT_GI;
1106         if (rate_info & MWL8K_STA_RATE_INFO_MCS_FORMAT)
1107                 status->flag |= RX_FLAG_HT;
1108
1109         if (rxd->channel > 14) {
1110                 status->band = IEEE80211_BAND_5GHZ;
1111                 if (!(status->flag & RX_FLAG_HT))
1112                         status->rate_idx -= 5;
1113         } else {
1114                 status->band = IEEE80211_BAND_2GHZ;
1115         }
1116         status->freq = ieee80211_channel_to_frequency(rxd->channel,
1117                                                       status->band);
1118
1119         *qos = rxd->qos_control;
1120         if ((rxd->rx_ctrl & MWL8K_STA_RX_CTRL_DECRYPT_ERROR) &&
1121             (rxd->rx_ctrl & MWL8K_STA_RX_CTRL_DEC_ERR_TYPE))
1122                 status->flag |= RX_FLAG_MMIC_ERROR;
1123
1124         return le16_to_cpu(rxd->pkt_len);
1125 }
1126
1127 static struct rxd_ops rxd_sta_ops = {
1128         .rxd_size       = sizeof(struct mwl8k_rxd_sta),
1129         .rxd_init       = mwl8k_rxd_sta_init,
1130         .rxd_refill     = mwl8k_rxd_sta_refill,
1131         .rxd_process    = mwl8k_rxd_sta_process,
1132 };
1133
1134
1135 #define MWL8K_RX_DESCS          256
1136 #define MWL8K_RX_MAXSZ          3800
1137
1138 static int mwl8k_rxq_init(struct ieee80211_hw *hw, int index)
1139 {
1140         struct mwl8k_priv *priv = hw->priv;
1141         struct mwl8k_rx_queue *rxq = priv->rxq + index;
1142         int size;
1143         int i;
1144
1145         rxq->rxd_count = 0;
1146         rxq->head = 0;
1147         rxq->tail = 0;
1148
1149         size = MWL8K_RX_DESCS * priv->rxd_ops->rxd_size;
1150
1151         rxq->rxd = pci_alloc_consistent(priv->pdev, size, &rxq->rxd_dma);
1152         if (rxq->rxd == NULL) {
1153                 wiphy_err(hw->wiphy, "failed to alloc RX descriptors\n");
1154                 return -ENOMEM;
1155         }
1156         memset(rxq->rxd, 0, size);
1157
1158         rxq->buf = kcalloc(MWL8K_RX_DESCS, sizeof(*rxq->buf), GFP_KERNEL);
1159         if (rxq->buf == NULL) {
1160                 pci_free_consistent(priv->pdev, size, rxq->rxd, rxq->rxd_dma);
1161                 return -ENOMEM;
1162         }
1163
1164         for (i = 0; i < MWL8K_RX_DESCS; i++) {
1165                 int desc_size;
1166                 void *rxd;
1167                 int nexti;
1168                 dma_addr_t next_dma_addr;
1169
1170                 desc_size = priv->rxd_ops->rxd_size;
1171                 rxd = rxq->rxd + (i * priv->rxd_ops->rxd_size);
1172
1173                 nexti = i + 1;
1174                 if (nexti == MWL8K_RX_DESCS)
1175                         nexti = 0;
1176                 next_dma_addr = rxq->rxd_dma + (nexti * desc_size);
1177
1178                 priv->rxd_ops->rxd_init(rxd, next_dma_addr);
1179         }
1180
1181         return 0;
1182 }
1183
1184 static int rxq_refill(struct ieee80211_hw *hw, int index, int limit)
1185 {
1186         struct mwl8k_priv *priv = hw->priv;
1187         struct mwl8k_rx_queue *rxq = priv->rxq + index;
1188         int refilled;
1189
1190         refilled = 0;
1191         while (rxq->rxd_count < MWL8K_RX_DESCS && limit--) {
1192                 struct sk_buff *skb;
1193                 dma_addr_t addr;
1194                 int rx;
1195                 void *rxd;
1196
1197                 skb = dev_alloc_skb(MWL8K_RX_MAXSZ);
1198                 if (skb == NULL)
1199                         break;
1200
1201                 addr = pci_map_single(priv->pdev, skb->data,
1202                                       MWL8K_RX_MAXSZ, DMA_FROM_DEVICE);
1203
1204                 rxq->rxd_count++;
1205                 rx = rxq->tail++;
1206                 if (rxq->tail == MWL8K_RX_DESCS)
1207                         rxq->tail = 0;
1208                 rxq->buf[rx].skb = skb;
1209                 dma_unmap_addr_set(&rxq->buf[rx], dma, addr);
1210
1211                 rxd = rxq->rxd + (rx * priv->rxd_ops->rxd_size);
1212                 priv->rxd_ops->rxd_refill(rxd, addr, MWL8K_RX_MAXSZ);
1213
1214                 refilled++;
1215         }
1216
1217         return refilled;
1218 }
1219
1220 /* Must be called only when the card's reception is completely halted */
1221 static void mwl8k_rxq_deinit(struct ieee80211_hw *hw, int index)
1222 {
1223         struct mwl8k_priv *priv = hw->priv;
1224         struct mwl8k_rx_queue *rxq = priv->rxq + index;
1225         int i;
1226
1227         if (rxq->rxd == NULL)
1228                 return;
1229
1230         for (i = 0; i < MWL8K_RX_DESCS; i++) {
1231                 if (rxq->buf[i].skb != NULL) {
1232                         pci_unmap_single(priv->pdev,
1233                                          dma_unmap_addr(&rxq->buf[i], dma),
1234                                          MWL8K_RX_MAXSZ, PCI_DMA_FROMDEVICE);
1235                         dma_unmap_addr_set(&rxq->buf[i], dma, 0);
1236
1237                         kfree_skb(rxq->buf[i].skb);
1238                         rxq->buf[i].skb = NULL;
1239                 }
1240         }
1241
1242         kfree(rxq->buf);
1243         rxq->buf = NULL;
1244
1245         pci_free_consistent(priv->pdev,
1246                             MWL8K_RX_DESCS * priv->rxd_ops->rxd_size,
1247                             rxq->rxd, rxq->rxd_dma);
1248         rxq->rxd = NULL;
1249 }
1250
1251
1252 /*
1253  * Scan a list of BSSIDs to process for finalize join.
1254  * Allows for extension to process multiple BSSIDs.
1255  */
1256 static inline int
1257 mwl8k_capture_bssid(struct mwl8k_priv *priv, struct ieee80211_hdr *wh)
1258 {
1259         return priv->capture_beacon &&
1260                 ieee80211_is_beacon(wh->frame_control) &&
1261                 ether_addr_equal(wh->addr3, priv->capture_bssid);
1262 }
1263
1264 static inline void mwl8k_save_beacon(struct ieee80211_hw *hw,
1265                                      struct sk_buff *skb)
1266 {
1267         struct mwl8k_priv *priv = hw->priv;
1268
1269         priv->capture_beacon = false;
1270         memset(priv->capture_bssid, 0, ETH_ALEN);
1271
1272         /*
1273          * Use GFP_ATOMIC as rxq_process is called from
1274          * the primary interrupt handler, memory allocation call
1275          * must not sleep.
1276          */
1277         priv->beacon_skb = skb_copy(skb, GFP_ATOMIC);
1278         if (priv->beacon_skb != NULL)
1279                 ieee80211_queue_work(hw, &priv->finalize_join_worker);
1280 }
1281
1282 static inline struct mwl8k_vif *mwl8k_find_vif_bss(struct list_head *vif_list,
1283                                                    u8 *bssid)
1284 {
1285         struct mwl8k_vif *mwl8k_vif;
1286
1287         list_for_each_entry(mwl8k_vif,
1288                             vif_list, list) {
1289                 if (memcmp(bssid, mwl8k_vif->bssid,
1290                            ETH_ALEN) == 0)
1291                         return mwl8k_vif;
1292         }
1293
1294         return NULL;
1295 }
1296
1297 static int rxq_process(struct ieee80211_hw *hw, int index, int limit)
1298 {
1299         struct mwl8k_priv *priv = hw->priv;
1300         struct mwl8k_vif *mwl8k_vif = NULL;
1301         struct mwl8k_rx_queue *rxq = priv->rxq + index;
1302         int processed;
1303
1304         processed = 0;
1305         while (rxq->rxd_count && limit--) {
1306                 struct sk_buff *skb;
1307                 void *rxd;
1308                 int pkt_len;
1309                 struct ieee80211_rx_status status;
1310                 struct ieee80211_hdr *wh;
1311                 __le16 qos;
1312
1313                 skb = rxq->buf[rxq->head].skb;
1314                 if (skb == NULL)
1315                         break;
1316
1317                 rxd = rxq->rxd + (rxq->head * priv->rxd_ops->rxd_size);
1318
1319                 pkt_len = priv->rxd_ops->rxd_process(rxd, &status, &qos,
1320                                                         &priv->noise);
1321                 if (pkt_len < 0)
1322                         break;
1323
1324                 rxq->buf[rxq->head].skb = NULL;
1325
1326                 pci_unmap_single(priv->pdev,
1327                                  dma_unmap_addr(&rxq->buf[rxq->head], dma),
1328                                  MWL8K_RX_MAXSZ, PCI_DMA_FROMDEVICE);
1329                 dma_unmap_addr_set(&rxq->buf[rxq->head], dma, 0);
1330
1331                 rxq->head++;
1332                 if (rxq->head == MWL8K_RX_DESCS)
1333                         rxq->head = 0;
1334
1335                 rxq->rxd_count--;
1336
1337                 wh = &((struct mwl8k_dma_data *)skb->data)->wh;
1338
1339                 /*
1340                  * Check for a pending join operation.  Save a
1341                  * copy of the beacon and schedule a tasklet to
1342                  * send a FINALIZE_JOIN command to the firmware.
1343                  */
1344                 if (mwl8k_capture_bssid(priv, (void *)skb->data))
1345                         mwl8k_save_beacon(hw, skb);
1346
1347                 if (ieee80211_has_protected(wh->frame_control)) {
1348
1349                         /* Check if hw crypto has been enabled for
1350                          * this bss. If yes, set the status flags
1351                          * accordingly
1352                          */
1353                         mwl8k_vif = mwl8k_find_vif_bss(&priv->vif_list,
1354                                                                 wh->addr1);
1355
1356                         if (mwl8k_vif != NULL &&
1357                             mwl8k_vif->is_hw_crypto_enabled) {
1358                                 /*
1359                                  * When MMIC ERROR is encountered
1360                                  * by the firmware, payload is
1361                                  * dropped and only 32 bytes of
1362                                  * mwl8k Firmware header is sent
1363                                  * to the host.
1364                                  *
1365                                  * We need to add four bytes of
1366                                  * key information.  In it
1367                                  * MAC80211 expects keyidx set to
1368                                  * 0 for triggering Counter
1369                                  * Measure of MMIC failure.
1370                                  */
1371                                 if (status.flag & RX_FLAG_MMIC_ERROR) {
1372                                         struct mwl8k_dma_data *tr;
1373                                         tr = (struct mwl8k_dma_data *)skb->data;
1374                                         memset((void *)&(tr->data), 0, 4);
1375                                         pkt_len += 4;
1376                                 }
1377
1378                                 if (!ieee80211_is_auth(wh->frame_control))
1379                                         status.flag |= RX_FLAG_IV_STRIPPED |
1380                                                        RX_FLAG_DECRYPTED |
1381                                                        RX_FLAG_MMIC_STRIPPED;
1382                         }
1383                 }
1384
1385                 skb_put(skb, pkt_len);
1386                 mwl8k_remove_dma_header(skb, qos);
1387                 memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
1388                 ieee80211_rx_irqsafe(hw, skb);
1389
1390                 processed++;
1391         }
1392
1393         return processed;
1394 }
1395
1396
1397 /*
1398  * Packet transmission.
1399  */
1400
1401 #define MWL8K_TXD_STATUS_OK                     0x00000001
1402 #define MWL8K_TXD_STATUS_OK_RETRY               0x00000002
1403 #define MWL8K_TXD_STATUS_OK_MORE_RETRY          0x00000004
1404 #define MWL8K_TXD_STATUS_MULTICAST_TX           0x00000008
1405 #define MWL8K_TXD_STATUS_FW_OWNED               0x80000000
1406
1407 #define MWL8K_QOS_QLEN_UNSPEC                   0xff00
1408 #define MWL8K_QOS_ACK_POLICY_MASK               0x0060
1409 #define MWL8K_QOS_ACK_POLICY_NORMAL             0x0000
1410 #define MWL8K_QOS_ACK_POLICY_BLOCKACK           0x0060
1411 #define MWL8K_QOS_EOSP                          0x0010
1412
1413 struct mwl8k_tx_desc {
1414         __le32 status;
1415         __u8 data_rate;
1416         __u8 tx_priority;
1417         __le16 qos_control;
1418         __le32 pkt_phys_addr;
1419         __le16 pkt_len;
1420         __u8 dest_MAC_addr[ETH_ALEN];
1421         __le32 next_txd_phys_addr;
1422         __le32 timestamp;
1423         __le16 rate_info;
1424         __u8 peer_id;
1425         __u8 tx_frag_cnt;
1426 } __packed;
1427
1428 #define MWL8K_TX_DESCS          128
1429
1430 static int mwl8k_txq_init(struct ieee80211_hw *hw, int index)
1431 {
1432         struct mwl8k_priv *priv = hw->priv;
1433         struct mwl8k_tx_queue *txq = priv->txq + index;
1434         int size;
1435         int i;
1436
1437         txq->len = 0;
1438         txq->head = 0;
1439         txq->tail = 0;
1440
1441         size = MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc);
1442
1443         txq->txd = pci_alloc_consistent(priv->pdev, size, &txq->txd_dma);
1444         if (txq->txd == NULL) {
1445                 wiphy_err(hw->wiphy, "failed to alloc TX descriptors\n");
1446                 return -ENOMEM;
1447         }
1448         memset(txq->txd, 0, size);
1449
1450         txq->skb = kcalloc(MWL8K_TX_DESCS, sizeof(*txq->skb), GFP_KERNEL);
1451         if (txq->skb == NULL) {
1452                 pci_free_consistent(priv->pdev, size, txq->txd, txq->txd_dma);
1453                 return -ENOMEM;
1454         }
1455
1456         for (i = 0; i < MWL8K_TX_DESCS; i++) {
1457                 struct mwl8k_tx_desc *tx_desc;
1458                 int nexti;
1459
1460                 tx_desc = txq->txd + i;
1461                 nexti = (i + 1) % MWL8K_TX_DESCS;
1462
1463                 tx_desc->status = 0;
1464                 tx_desc->next_txd_phys_addr =
1465                         cpu_to_le32(txq->txd_dma + nexti * sizeof(*tx_desc));
1466         }
1467
1468         return 0;
1469 }
1470
1471 static inline void mwl8k_tx_start(struct mwl8k_priv *priv)
1472 {
1473         iowrite32(MWL8K_H2A_INT_PPA_READY,
1474                 priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
1475         iowrite32(MWL8K_H2A_INT_DUMMY,
1476                 priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
1477         ioread32(priv->regs + MWL8K_HIU_INT_CODE);
1478 }
1479
1480 static void mwl8k_dump_tx_rings(struct ieee80211_hw *hw)
1481 {
1482         struct mwl8k_priv *priv = hw->priv;
1483         int i;
1484
1485         for (i = 0; i < mwl8k_tx_queues(priv); i++) {
1486                 struct mwl8k_tx_queue *txq = priv->txq + i;
1487                 int fw_owned = 0;
1488                 int drv_owned = 0;
1489                 int unused = 0;
1490                 int desc;
1491
1492                 for (desc = 0; desc < MWL8K_TX_DESCS; desc++) {
1493                         struct mwl8k_tx_desc *tx_desc = txq->txd + desc;
1494                         u32 status;
1495
1496                         status = le32_to_cpu(tx_desc->status);
1497                         if (status & MWL8K_TXD_STATUS_FW_OWNED)
1498                                 fw_owned++;
1499                         else
1500                                 drv_owned++;
1501
1502                         if (tx_desc->pkt_len == 0)
1503                                 unused++;
1504                 }
1505
1506                 wiphy_err(hw->wiphy,
1507                           "txq[%d] len=%d head=%d tail=%d "
1508                           "fw_owned=%d drv_owned=%d unused=%d\n",
1509                           i,
1510                           txq->len, txq->head, txq->tail,
1511                           fw_owned, drv_owned, unused);
1512         }
1513 }
1514
1515 /*
1516  * Must be called with priv->fw_mutex held and tx queues stopped.
1517  */
1518 #define MWL8K_TX_WAIT_TIMEOUT_MS        5000
1519
1520 static int mwl8k_tx_wait_empty(struct ieee80211_hw *hw)
1521 {
1522         struct mwl8k_priv *priv = hw->priv;
1523         DECLARE_COMPLETION_ONSTACK(tx_wait);
1524         int retry;
1525         int rc;
1526
1527         might_sleep();
1528
1529         /* Since fw restart is in progress, allow only the firmware
1530          * commands from the restart code and block the other
1531          * commands since they are going to fail in any case since
1532          * the firmware has crashed
1533          */
1534         if (priv->hw_restart_in_progress) {
1535                 if (priv->hw_restart_owner == current)
1536                         return 0;
1537                 else
1538                         return -EBUSY;
1539         }
1540
1541         if (atomic_read(&priv->watchdog_event_pending))
1542                 return 0;
1543
1544         /*
1545          * The TX queues are stopped at this point, so this test
1546          * doesn't need to take ->tx_lock.
1547          */
1548         if (!priv->pending_tx_pkts)
1549                 return 0;
1550
1551         retry = 1;
1552         rc = 0;
1553
1554         spin_lock_bh(&priv->tx_lock);
1555         priv->tx_wait = &tx_wait;
1556         while (!rc) {
1557                 int oldcount;
1558                 unsigned long timeout;
1559
1560                 oldcount = priv->pending_tx_pkts;
1561
1562                 spin_unlock_bh(&priv->tx_lock);
1563                 timeout = wait_for_completion_timeout(&tx_wait,
1564                             msecs_to_jiffies(MWL8K_TX_WAIT_TIMEOUT_MS));
1565
1566                 if (atomic_read(&priv->watchdog_event_pending)) {
1567                         spin_lock_bh(&priv->tx_lock);
1568                         priv->tx_wait = NULL;
1569                         spin_unlock_bh(&priv->tx_lock);
1570                         return 0;
1571                 }
1572
1573                 spin_lock_bh(&priv->tx_lock);
1574
1575                 if (timeout || !priv->pending_tx_pkts) {
1576                         WARN_ON(priv->pending_tx_pkts);
1577                         if (retry)
1578                                 wiphy_notice(hw->wiphy, "tx rings drained\n");
1579                         break;
1580                 }
1581
1582                 if (retry) {
1583                         mwl8k_tx_start(priv);
1584                         retry = 0;
1585                         continue;
1586                 }
1587
1588                 if (priv->pending_tx_pkts < oldcount) {
1589                         wiphy_notice(hw->wiphy,
1590                                      "waiting for tx rings to drain (%d -> %d pkts)\n",
1591                                      oldcount, priv->pending_tx_pkts);
1592                         retry = 1;
1593                         continue;
1594                 }
1595
1596                 priv->tx_wait = NULL;
1597
1598                 wiphy_err(hw->wiphy, "tx rings stuck for %d ms\n",
1599                           MWL8K_TX_WAIT_TIMEOUT_MS);
1600                 mwl8k_dump_tx_rings(hw);
1601                 priv->hw_restart_in_progress = true;
1602                 ieee80211_queue_work(hw, &priv->fw_reload);
1603
1604                 rc = -ETIMEDOUT;
1605         }
1606         priv->tx_wait = NULL;
1607         spin_unlock_bh(&priv->tx_lock);
1608
1609         return rc;
1610 }
1611
1612 #define MWL8K_TXD_SUCCESS(status)                               \
1613         ((status) & (MWL8K_TXD_STATUS_OK |                      \
1614                      MWL8K_TXD_STATUS_OK_RETRY |                \
1615                      MWL8K_TXD_STATUS_OK_MORE_RETRY))
1616
1617 static int mwl8k_tid_queue_mapping(u8 tid)
1618 {
1619         BUG_ON(tid > 7);
1620
1621         switch (tid) {
1622         case 0:
1623         case 3:
1624                 return IEEE80211_AC_BE;
1625                 break;
1626         case 1:
1627         case 2:
1628                 return IEEE80211_AC_BK;
1629                 break;
1630         case 4:
1631         case 5:
1632                 return IEEE80211_AC_VI;
1633                 break;
1634         case 6:
1635         case 7:
1636                 return IEEE80211_AC_VO;
1637                 break;
1638         default:
1639                 return -1;
1640                 break;
1641         }
1642 }
1643
1644 /* The firmware will fill in the rate information
1645  * for each packet that gets queued in the hardware
1646  * and these macros will interpret that info.
1647  */
1648
1649 #define RI_FORMAT(a)              (a & 0x0001)
1650 #define RI_RATE_ID_MCS(a)        ((a & 0x01f8) >> 3)
1651
1652 static int
1653 mwl8k_txq_reclaim(struct ieee80211_hw *hw, int index, int limit, int force)
1654 {
1655         struct mwl8k_priv *priv = hw->priv;
1656         struct mwl8k_tx_queue *txq = priv->txq + index;
1657         int processed;
1658
1659         processed = 0;
1660         while (txq->len > 0 && limit--) {
1661                 int tx;
1662                 struct mwl8k_tx_desc *tx_desc;
1663                 unsigned long addr;
1664                 int size;
1665                 struct sk_buff *skb;
1666                 struct ieee80211_tx_info *info;
1667                 u32 status;
1668                 struct ieee80211_sta *sta;
1669                 struct mwl8k_sta *sta_info = NULL;
1670                 u16 rate_info;
1671                 struct ieee80211_hdr *wh;
1672
1673                 tx = txq->head;
1674                 tx_desc = txq->txd + tx;
1675
1676                 status = le32_to_cpu(tx_desc->status);
1677
1678                 if (status & MWL8K_TXD_STATUS_FW_OWNED) {
1679                         if (!force)
1680                                 break;
1681                         tx_desc->status &=
1682                                 ~cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED);
1683                 }
1684
1685                 txq->head = (tx + 1) % MWL8K_TX_DESCS;
1686                 BUG_ON(txq->len == 0);
1687                 txq->len--;
1688                 priv->pending_tx_pkts--;
1689
1690                 addr = le32_to_cpu(tx_desc->pkt_phys_addr);
1691                 size = le16_to_cpu(tx_desc->pkt_len);
1692                 skb = txq->skb[tx];
1693                 txq->skb[tx] = NULL;
1694
1695                 BUG_ON(skb == NULL);
1696                 pci_unmap_single(priv->pdev, addr, size, PCI_DMA_TODEVICE);
1697
1698                 mwl8k_remove_dma_header(skb, tx_desc->qos_control);
1699
1700                 wh = (struct ieee80211_hdr *) skb->data;
1701
1702                 /* Mark descriptor as unused */
1703                 tx_desc->pkt_phys_addr = 0;
1704                 tx_desc->pkt_len = 0;
1705
1706                 info = IEEE80211_SKB_CB(skb);
1707                 if (ieee80211_is_data(wh->frame_control)) {
1708                         rcu_read_lock();
1709                         sta = ieee80211_find_sta_by_ifaddr(hw, wh->addr1,
1710                                                            wh->addr2);
1711                         if (sta) {
1712                                 sta_info = MWL8K_STA(sta);
1713                                 BUG_ON(sta_info == NULL);
1714                                 rate_info = le16_to_cpu(tx_desc->rate_info);
1715                                 /* If rate is < 6.5 Mpbs for an ht station
1716                                  * do not form an ampdu. If the station is a
1717                                  * legacy station (format = 0), do not form an
1718                                  * ampdu
1719                                  */
1720                                 if (RI_RATE_ID_MCS(rate_info) < 1 ||
1721                                     RI_FORMAT(rate_info) == 0) {
1722                                         sta_info->is_ampdu_allowed = false;
1723                                 } else {
1724                                         sta_info->is_ampdu_allowed = true;
1725                                 }
1726                         }
1727                         rcu_read_unlock();
1728                 }
1729
1730                 ieee80211_tx_info_clear_status(info);
1731
1732                 /* Rate control is happening in the firmware.
1733                  * Ensure no tx rate is being reported.
1734                  */
1735                 info->status.rates[0].idx = -1;
1736                 info->status.rates[0].count = 1;
1737
1738                 if (MWL8K_TXD_SUCCESS(status))
1739                         info->flags |= IEEE80211_TX_STAT_ACK;
1740
1741                 ieee80211_tx_status_irqsafe(hw, skb);
1742
1743                 processed++;
1744         }
1745
1746         return processed;
1747 }
1748
1749 /* must be called only when the card's transmit is completely halted */
1750 static void mwl8k_txq_deinit(struct ieee80211_hw *hw, int index)
1751 {
1752         struct mwl8k_priv *priv = hw->priv;
1753         struct mwl8k_tx_queue *txq = priv->txq + index;
1754
1755         if (txq->txd == NULL)
1756                 return;
1757
1758         mwl8k_txq_reclaim(hw, index, INT_MAX, 1);
1759
1760         kfree(txq->skb);
1761         txq->skb = NULL;
1762
1763         pci_free_consistent(priv->pdev,
1764                             MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc),
1765                             txq->txd, txq->txd_dma);
1766         txq->txd = NULL;
1767 }
1768
1769 /* caller must hold priv->stream_lock when calling the stream functions */
1770 static struct mwl8k_ampdu_stream *
1771 mwl8k_add_stream(struct ieee80211_hw *hw, struct ieee80211_sta *sta, u8 tid)
1772 {
1773         struct mwl8k_ampdu_stream *stream;
1774         struct mwl8k_priv *priv = hw->priv;
1775         int i;
1776
1777         for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
1778                 stream = &priv->ampdu[i];
1779                 if (stream->state == AMPDU_NO_STREAM) {
1780                         stream->sta = sta;
1781                         stream->state = AMPDU_STREAM_NEW;
1782                         stream->tid = tid;
1783                         stream->idx = i;
1784                         wiphy_debug(hw->wiphy, "Added a new stream for %pM %d",
1785                                     sta->addr, tid);
1786                         return stream;
1787                 }
1788         }
1789         return NULL;
1790 }
1791
1792 static int
1793 mwl8k_start_stream(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream)
1794 {
1795         int ret;
1796
1797         /* if the stream has already been started, don't start it again */
1798         if (stream->state != AMPDU_STREAM_NEW)
1799                 return 0;
1800         ret = ieee80211_start_tx_ba_session(stream->sta, stream->tid, 0);
1801         if (ret)
1802                 wiphy_debug(hw->wiphy, "Failed to start stream for %pM %d: "
1803                             "%d\n", stream->sta->addr, stream->tid, ret);
1804         else
1805                 wiphy_debug(hw->wiphy, "Started stream for %pM %d\n",
1806                             stream->sta->addr, stream->tid);
1807         return ret;
1808 }
1809
1810 static void
1811 mwl8k_remove_stream(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream)
1812 {
1813         wiphy_debug(hw->wiphy, "Remove stream for %pM %d\n", stream->sta->addr,
1814                     stream->tid);
1815         memset(stream, 0, sizeof(*stream));
1816 }
1817
1818 static struct mwl8k_ampdu_stream *
1819 mwl8k_lookup_stream(struct ieee80211_hw *hw, u8 *addr, u8 tid)
1820 {
1821         struct mwl8k_priv *priv = hw->priv;
1822         int i;
1823
1824         for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
1825                 struct mwl8k_ampdu_stream *stream;
1826                 stream = &priv->ampdu[i];
1827                 if (stream->state == AMPDU_NO_STREAM)
1828                         continue;
1829                 if (!memcmp(stream->sta->addr, addr, ETH_ALEN) &&
1830                     stream->tid == tid)
1831                         return stream;
1832         }
1833         return NULL;
1834 }
1835
1836 #define MWL8K_AMPDU_PACKET_THRESHOLD 64
1837 static inline bool mwl8k_ampdu_allowed(struct ieee80211_sta *sta, u8 tid)
1838 {
1839         struct mwl8k_sta *sta_info = MWL8K_STA(sta);
1840         struct tx_traffic_info *tx_stats;
1841
1842         BUG_ON(tid >= MWL8K_MAX_TID);
1843         tx_stats = &sta_info->tx_stats[tid];
1844
1845         return sta_info->is_ampdu_allowed &&
1846                 tx_stats->pkts > MWL8K_AMPDU_PACKET_THRESHOLD;
1847 }
1848
1849 static inline void mwl8k_tx_count_packet(struct ieee80211_sta *sta, u8 tid)
1850 {
1851         struct mwl8k_sta *sta_info = MWL8K_STA(sta);
1852         struct tx_traffic_info *tx_stats;
1853
1854         BUG_ON(tid >= MWL8K_MAX_TID);
1855         tx_stats = &sta_info->tx_stats[tid];
1856
1857         if (tx_stats->start_time == 0)
1858                 tx_stats->start_time = jiffies;
1859
1860         /* reset the packet count after each second elapses.  If the number of
1861          * packets ever exceeds the ampdu_min_traffic threshold, we will allow
1862          * an ampdu stream to be started.
1863          */
1864         if (jiffies - tx_stats->start_time > HZ) {
1865                 tx_stats->pkts = 0;
1866                 tx_stats->start_time = 0;
1867         } else
1868                 tx_stats->pkts++;
1869 }
1870
1871 /* The hardware ampdu queues start from 5.
1872  * txpriorities for ampdu queues are
1873  * 5 6 7 0 1 2 3 4 ie., queue 5 is highest
1874  * and queue 3 is lowest (queue 4 is reserved)
1875  */
1876 #define BA_QUEUE                5
1877
1878 static void
1879 mwl8k_txq_xmit(struct ieee80211_hw *hw,
1880                int index,
1881                struct ieee80211_sta *sta,
1882                struct sk_buff *skb)
1883 {
1884         struct mwl8k_priv *priv = hw->priv;
1885         struct ieee80211_tx_info *tx_info;
1886         struct mwl8k_vif *mwl8k_vif;
1887         struct ieee80211_hdr *wh;
1888         struct mwl8k_tx_queue *txq;
1889         struct mwl8k_tx_desc *tx;
1890         dma_addr_t dma;
1891         u32 txstatus;
1892         u8 txdatarate;
1893         u16 qos;
1894         int txpriority;
1895         u8 tid = 0;
1896         struct mwl8k_ampdu_stream *stream = NULL;
1897         bool start_ba_session = false;
1898         bool mgmtframe = false;
1899         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
1900         bool eapol_frame = false;
1901
1902         wh = (struct ieee80211_hdr *)skb->data;
1903         if (ieee80211_is_data_qos(wh->frame_control))
1904                 qos = le16_to_cpu(*((__le16 *)ieee80211_get_qos_ctl(wh)));
1905         else
1906                 qos = 0;
1907
1908         if (skb->protocol == cpu_to_be16(ETH_P_PAE))
1909                 eapol_frame = true;
1910
1911         if (ieee80211_is_mgmt(wh->frame_control))
1912                 mgmtframe = true;
1913
1914         if (priv->ap_fw)
1915                 mwl8k_encapsulate_tx_frame(priv, skb);
1916         else
1917                 mwl8k_add_dma_header(priv, skb, 0, 0);
1918
1919         wh = &((struct mwl8k_dma_data *)skb->data)->wh;
1920
1921         tx_info = IEEE80211_SKB_CB(skb);
1922         mwl8k_vif = MWL8K_VIF(tx_info->control.vif);
1923
1924         if (tx_info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
1925                 wh->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1926                 wh->seq_ctrl |= cpu_to_le16(mwl8k_vif->seqno);
1927                 mwl8k_vif->seqno += 0x10;
1928         }
1929
1930         /* Setup firmware control bit fields for each frame type.  */
1931         txstatus = 0;
1932         txdatarate = 0;
1933         if (ieee80211_is_mgmt(wh->frame_control) ||
1934             ieee80211_is_ctl(wh->frame_control)) {
1935                 txdatarate = 0;
1936                 qos |= MWL8K_QOS_QLEN_UNSPEC | MWL8K_QOS_EOSP;
1937         } else if (ieee80211_is_data(wh->frame_control)) {
1938                 txdatarate = 1;
1939                 if (is_multicast_ether_addr(wh->addr1))
1940                         txstatus |= MWL8K_TXD_STATUS_MULTICAST_TX;
1941
1942                 qos &= ~MWL8K_QOS_ACK_POLICY_MASK;
1943                 if (tx_info->flags & IEEE80211_TX_CTL_AMPDU)
1944                         qos |= MWL8K_QOS_ACK_POLICY_BLOCKACK;
1945                 else
1946                         qos |= MWL8K_QOS_ACK_POLICY_NORMAL;
1947         }
1948
1949         /* Queue ADDBA request in the respective data queue.  While setting up
1950          * the ampdu stream, mac80211 queues further packets for that
1951          * particular ra/tid pair.  However, packets piled up in the hardware
1952          * for that ra/tid pair will still go out. ADDBA request and the
1953          * related data packets going out from different queues asynchronously
1954          * will cause a shift in the receiver window which might result in
1955          * ampdu packets getting dropped at the receiver after the stream has
1956          * been setup.
1957          */
1958         if (unlikely(ieee80211_is_action(wh->frame_control) &&
1959             mgmt->u.action.category == WLAN_CATEGORY_BACK &&
1960             mgmt->u.action.u.addba_req.action_code == WLAN_ACTION_ADDBA_REQ &&
1961             priv->ap_fw)) {
1962                 u16 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1963                 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1964                 index = mwl8k_tid_queue_mapping(tid);
1965         }
1966
1967         txpriority = index;
1968
1969         if (priv->ap_fw && sta && sta->ht_cap.ht_supported && !eapol_frame &&
1970             ieee80211_is_data_qos(wh->frame_control)) {
1971                 tid = qos & 0xf;
1972                 mwl8k_tx_count_packet(sta, tid);
1973                 spin_lock(&priv->stream_lock);
1974                 stream = mwl8k_lookup_stream(hw, sta->addr, tid);
1975                 if (stream != NULL) {
1976                         if (stream->state == AMPDU_STREAM_ACTIVE) {
1977                                 WARN_ON(!(qos & MWL8K_QOS_ACK_POLICY_BLOCKACK));
1978                                 txpriority = (BA_QUEUE + stream->idx) %
1979                                              TOTAL_HW_TX_QUEUES;
1980                                 if (stream->idx <= 1)
1981                                         index = stream->idx +
1982                                                 MWL8K_TX_WMM_QUEUES;
1983
1984                         } else if (stream->state == AMPDU_STREAM_NEW) {
1985                                 /* We get here if the driver sends us packets
1986                                  * after we've initiated a stream, but before
1987                                  * our ampdu_action routine has been called
1988                                  * with IEEE80211_AMPDU_TX_START to get the SSN
1989                                  * for the ADDBA request.  So this packet can
1990                                  * go out with no risk of sequence number
1991                                  * mismatch.  No special handling is required.
1992                                  */
1993                         } else {
1994                                 /* Drop packets that would go out after the
1995                                  * ADDBA request was sent but before the ADDBA
1996                                  * response is received.  If we don't do this,
1997                                  * the recipient would probably receive it
1998                                  * after the ADDBA request with SSN 0.  This
1999                                  * will cause the recipient's BA receive window
2000                                  * to shift, which would cause the subsequent
2001                                  * packets in the BA stream to be discarded.
2002                                  * mac80211 queues our packets for us in this
2003                                  * case, so this is really just a safety check.
2004                                  */
2005                                 wiphy_warn(hw->wiphy,
2006                                            "Cannot send packet while ADDBA "
2007                                            "dialog is underway.\n");
2008                                 spin_unlock(&priv->stream_lock);
2009                                 dev_kfree_skb(skb);
2010                                 return;
2011                         }
2012                 } else {
2013                         /* Defer calling mwl8k_start_stream so that the current
2014                          * skb can go out before the ADDBA request.  This
2015                          * prevents sequence number mismatch at the recepient
2016                          * as described above.
2017                          */
2018                         if (mwl8k_ampdu_allowed(sta, tid)) {
2019                                 stream = mwl8k_add_stream(hw, sta, tid);
2020                                 if (stream != NULL)
2021                                         start_ba_session = true;
2022                         }
2023                 }
2024                 spin_unlock(&priv->stream_lock);
2025         } else {
2026                 qos &= ~MWL8K_QOS_ACK_POLICY_MASK;
2027                 qos |= MWL8K_QOS_ACK_POLICY_NORMAL;
2028         }
2029
2030         dma = pci_map_single(priv->pdev, skb->data,
2031                                 skb->len, PCI_DMA_TODEVICE);
2032
2033         if (pci_dma_mapping_error(priv->pdev, dma)) {
2034                 wiphy_debug(hw->wiphy,
2035                             "failed to dma map skb, dropping TX frame.\n");
2036                 if (start_ba_session) {
2037                         spin_lock(&priv->stream_lock);
2038                         mwl8k_remove_stream(hw, stream);
2039                         spin_unlock(&priv->stream_lock);
2040                 }
2041                 dev_kfree_skb(skb);
2042                 return;
2043         }
2044
2045         spin_lock_bh(&priv->tx_lock);
2046
2047         txq = priv->txq + index;
2048
2049         /* Mgmt frames that go out frequently are probe
2050          * responses. Other mgmt frames got out relatively
2051          * infrequently. Hence reserve 2 buffers so that
2052          * other mgmt frames do not get dropped due to an
2053          * already queued probe response in one of the
2054          * reserved buffers.
2055          */
2056
2057         if (txq->len >= MWL8K_TX_DESCS - 2) {
2058                 if (!mgmtframe || txq->len == MWL8K_TX_DESCS) {
2059                         if (start_ba_session) {
2060                                 spin_lock(&priv->stream_lock);
2061                                 mwl8k_remove_stream(hw, stream);
2062                                 spin_unlock(&priv->stream_lock);
2063                         }
2064                         mwl8k_tx_start(priv);
2065                         spin_unlock_bh(&priv->tx_lock);
2066                         pci_unmap_single(priv->pdev, dma, skb->len,
2067                                          PCI_DMA_TODEVICE);
2068                         dev_kfree_skb(skb);
2069                         return;
2070                 }
2071         }
2072
2073         BUG_ON(txq->skb[txq->tail] != NULL);
2074         txq->skb[txq->tail] = skb;
2075
2076         tx = txq->txd + txq->tail;
2077         tx->data_rate = txdatarate;
2078         tx->tx_priority = txpriority;
2079         tx->qos_control = cpu_to_le16(qos);
2080         tx->pkt_phys_addr = cpu_to_le32(dma);
2081         tx->pkt_len = cpu_to_le16(skb->len);
2082         tx->rate_info = 0;
2083         if (!priv->ap_fw && sta != NULL)
2084                 tx->peer_id = MWL8K_STA(sta)->peer_id;
2085         else
2086                 tx->peer_id = 0;
2087
2088         if (priv->ap_fw && ieee80211_is_data(wh->frame_control) && !eapol_frame)
2089                 tx->timestamp = cpu_to_le32(ioread32(priv->regs +
2090                                                 MWL8K_HW_TIMER_REGISTER));
2091         else
2092                 tx->timestamp = 0;
2093
2094         wmb();
2095         tx->status = cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED | txstatus);
2096
2097         txq->len++;
2098         priv->pending_tx_pkts++;
2099
2100         txq->tail++;
2101         if (txq->tail == MWL8K_TX_DESCS)
2102                 txq->tail = 0;
2103
2104         mwl8k_tx_start(priv);
2105
2106         spin_unlock_bh(&priv->tx_lock);
2107
2108         /* Initiate the ampdu session here */
2109         if (start_ba_session) {
2110                 spin_lock(&priv->stream_lock);
2111                 if (mwl8k_start_stream(hw, stream))
2112                         mwl8k_remove_stream(hw, stream);
2113                 spin_unlock(&priv->stream_lock);
2114         }
2115 }
2116
2117
2118 /*
2119  * Firmware access.
2120  *
2121  * We have the following requirements for issuing firmware commands:
2122  * - Some commands require that the packet transmit path is idle when
2123  *   the command is issued.  (For simplicity, we'll just quiesce the
2124  *   transmit path for every command.)
2125  * - There are certain sequences of commands that need to be issued to
2126  *   the hardware sequentially, with no other intervening commands.
2127  *
2128  * This leads to an implementation of a "firmware lock" as a mutex that
2129  * can be taken recursively, and which is taken by both the low-level
2130  * command submission function (mwl8k_post_cmd) as well as any users of
2131  * that function that require issuing of an atomic sequence of commands,
2132  * and quiesces the transmit path whenever it's taken.
2133  */
2134 static int mwl8k_fw_lock(struct ieee80211_hw *hw)
2135 {
2136         struct mwl8k_priv *priv = hw->priv;
2137
2138         if (priv->fw_mutex_owner != current) {
2139                 int rc;
2140
2141                 mutex_lock(&priv->fw_mutex);
2142                 ieee80211_stop_queues(hw);
2143
2144                 rc = mwl8k_tx_wait_empty(hw);
2145                 if (rc) {
2146                         if (!priv->hw_restart_in_progress)
2147                                 ieee80211_wake_queues(hw);
2148
2149                         mutex_unlock(&priv->fw_mutex);
2150
2151                         return rc;
2152                 }
2153
2154                 priv->fw_mutex_owner = current;
2155         }
2156
2157         priv->fw_mutex_depth++;
2158
2159         return 0;
2160 }
2161
2162 static void mwl8k_fw_unlock(struct ieee80211_hw *hw)
2163 {
2164         struct mwl8k_priv *priv = hw->priv;
2165
2166         if (!--priv->fw_mutex_depth) {
2167                 if (!priv->hw_restart_in_progress)
2168                         ieee80211_wake_queues(hw);
2169
2170                 priv->fw_mutex_owner = NULL;
2171                 mutex_unlock(&priv->fw_mutex);
2172         }
2173 }
2174
2175 static void mwl8k_enable_bsses(struct ieee80211_hw *hw, bool enable,
2176                                u32 bitmap);
2177
2178 /*
2179  * Command processing.
2180  */
2181
2182 /* Timeout firmware commands after 10s */
2183 #define MWL8K_CMD_TIMEOUT_MS    10000
2184
2185 static int mwl8k_post_cmd(struct ieee80211_hw *hw, struct mwl8k_cmd_pkt *cmd)
2186 {
2187         DECLARE_COMPLETION_ONSTACK(cmd_wait);
2188         struct mwl8k_priv *priv = hw->priv;
2189         void __iomem *regs = priv->regs;
2190         dma_addr_t dma_addr;
2191         unsigned int dma_size;
2192         int rc;
2193         unsigned long timeout = 0;
2194         u8 buf[32];
2195         u32 bitmap = 0;
2196
2197         wiphy_dbg(hw->wiphy, "Posting %s [%d]\n",
2198                   mwl8k_cmd_name(cmd->code, buf, sizeof(buf)), cmd->macid);
2199
2200         /* Before posting firmware commands that could change the hardware
2201          * characteristics, make sure that all BSSes are stopped temporary.
2202          * Enable these stopped BSSes after completion of the commands
2203          */
2204
2205         rc = mwl8k_fw_lock(hw);
2206         if (rc)
2207                 return rc;
2208
2209         if (priv->ap_fw && priv->running_bsses) {
2210                 switch (le16_to_cpu(cmd->code)) {
2211                 case MWL8K_CMD_SET_RF_CHANNEL:
2212                 case MWL8K_CMD_RADIO_CONTROL:
2213                 case MWL8K_CMD_RF_TX_POWER:
2214                 case MWL8K_CMD_TX_POWER:
2215                 case MWL8K_CMD_RF_ANTENNA:
2216                 case MWL8K_CMD_RTS_THRESHOLD:
2217                 case MWL8K_CMD_MIMO_CONFIG:
2218                         bitmap = priv->running_bsses;
2219                         mwl8k_enable_bsses(hw, false, bitmap);
2220                         break;
2221                 }
2222         }
2223
2224         cmd->result = (__force __le16) 0xffff;
2225         dma_size = le16_to_cpu(cmd->length);
2226         dma_addr = pci_map_single(priv->pdev, cmd, dma_size,
2227                                   PCI_DMA_BIDIRECTIONAL);
2228         if (pci_dma_mapping_error(priv->pdev, dma_addr))
2229                 return -ENOMEM;
2230
2231         priv->hostcmd_wait = &cmd_wait;
2232         iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR);
2233         iowrite32(MWL8K_H2A_INT_DOORBELL,
2234                 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
2235         iowrite32(MWL8K_H2A_INT_DUMMY,
2236                 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
2237
2238         timeout = wait_for_completion_timeout(&cmd_wait,
2239                                 msecs_to_jiffies(MWL8K_CMD_TIMEOUT_MS));
2240
2241         priv->hostcmd_wait = NULL;
2242
2243
2244         pci_unmap_single(priv->pdev, dma_addr, dma_size,
2245                                         PCI_DMA_BIDIRECTIONAL);
2246
2247         if (!timeout) {
2248                 wiphy_err(hw->wiphy, "Command %s timeout after %u ms\n",
2249                           mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
2250                           MWL8K_CMD_TIMEOUT_MS);
2251                 rc = -ETIMEDOUT;
2252         } else {
2253                 int ms;
2254
2255                 ms = MWL8K_CMD_TIMEOUT_MS - jiffies_to_msecs(timeout);
2256
2257                 rc = cmd->result ? -EINVAL : 0;
2258                 if (rc)
2259                         wiphy_err(hw->wiphy, "Command %s error 0x%x\n",
2260                                   mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
2261                                   le16_to_cpu(cmd->result));
2262                 else if (ms > 2000)
2263                         wiphy_notice(hw->wiphy, "Command %s took %d ms\n",
2264                                      mwl8k_cmd_name(cmd->code,
2265                                                     buf, sizeof(buf)),
2266                                      ms);
2267         }
2268
2269         if (bitmap)
2270                 mwl8k_enable_bsses(hw, true, bitmap);
2271
2272         mwl8k_fw_unlock(hw);
2273
2274         return rc;
2275 }
2276
2277 static int mwl8k_post_pervif_cmd(struct ieee80211_hw *hw,
2278                                  struct ieee80211_vif *vif,
2279                                  struct mwl8k_cmd_pkt *cmd)
2280 {
2281         if (vif != NULL)
2282                 cmd->macid = MWL8K_VIF(vif)->macid;
2283         return mwl8k_post_cmd(hw, cmd);
2284 }
2285
2286 /*
2287  * Setup code shared between STA and AP firmware images.
2288  */
2289 static void mwl8k_setup_2ghz_band(struct ieee80211_hw *hw)
2290 {
2291         struct mwl8k_priv *priv = hw->priv;
2292
2293         BUILD_BUG_ON(sizeof(priv->channels_24) != sizeof(mwl8k_channels_24));
2294         memcpy(priv->channels_24, mwl8k_channels_24, sizeof(mwl8k_channels_24));
2295
2296         BUILD_BUG_ON(sizeof(priv->rates_24) != sizeof(mwl8k_rates_24));
2297         memcpy(priv->rates_24, mwl8k_rates_24, sizeof(mwl8k_rates_24));
2298
2299         priv->band_24.band = IEEE80211_BAND_2GHZ;
2300         priv->band_24.channels = priv->channels_24;
2301         priv->band_24.n_channels = ARRAY_SIZE(mwl8k_channels_24);
2302         priv->band_24.bitrates = priv->rates_24;
2303         priv->band_24.n_bitrates = ARRAY_SIZE(mwl8k_rates_24);
2304
2305         hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->band_24;
2306 }
2307
2308 static void mwl8k_setup_5ghz_band(struct ieee80211_hw *hw)
2309 {
2310         struct mwl8k_priv *priv = hw->priv;
2311
2312         BUILD_BUG_ON(sizeof(priv->channels_50) != sizeof(mwl8k_channels_50));
2313         memcpy(priv->channels_50, mwl8k_channels_50, sizeof(mwl8k_channels_50));
2314
2315         BUILD_BUG_ON(sizeof(priv->rates_50) != sizeof(mwl8k_rates_50));
2316         memcpy(priv->rates_50, mwl8k_rates_50, sizeof(mwl8k_rates_50));
2317
2318         priv->band_50.band = IEEE80211_BAND_5GHZ;
2319         priv->band_50.channels = priv->channels_50;
2320         priv->band_50.n_channels = ARRAY_SIZE(mwl8k_channels_50);
2321         priv->band_50.bitrates = priv->rates_50;
2322         priv->band_50.n_bitrates = ARRAY_SIZE(mwl8k_rates_50);
2323
2324         hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &priv->band_50;
2325 }
2326
2327 /*
2328  * CMD_GET_HW_SPEC (STA version).
2329  */
2330 struct mwl8k_cmd_get_hw_spec_sta {
2331         struct mwl8k_cmd_pkt header;
2332         __u8 hw_rev;
2333         __u8 host_interface;
2334         __le16 num_mcaddrs;
2335         __u8 perm_addr[ETH_ALEN];
2336         __le16 region_code;
2337         __le32 fw_rev;
2338         __le32 ps_cookie;
2339         __le32 caps;
2340         __u8 mcs_bitmap[16];
2341         __le32 rx_queue_ptr;
2342         __le32 num_tx_queues;
2343         __le32 tx_queue_ptrs[MWL8K_TX_WMM_QUEUES];
2344         __le32 caps2;
2345         __le32 num_tx_desc_per_queue;
2346         __le32 total_rxd;
2347 } __packed;
2348
2349 #define MWL8K_CAP_MAX_AMSDU             0x20000000
2350 #define MWL8K_CAP_GREENFIELD            0x08000000
2351 #define MWL8K_CAP_AMPDU                 0x04000000
2352 #define MWL8K_CAP_RX_STBC               0x01000000
2353 #define MWL8K_CAP_TX_STBC               0x00800000
2354 #define MWL8K_CAP_SHORTGI_40MHZ         0x00400000
2355 #define MWL8K_CAP_SHORTGI_20MHZ         0x00200000
2356 #define MWL8K_CAP_RX_ANTENNA_MASK       0x000e0000
2357 #define MWL8K_CAP_TX_ANTENNA_MASK       0x0001c000
2358 #define MWL8K_CAP_DELAY_BA              0x00003000
2359 #define MWL8K_CAP_MIMO                  0x00000200
2360 #define MWL8K_CAP_40MHZ                 0x00000100
2361 #define MWL8K_CAP_BAND_MASK             0x00000007
2362 #define MWL8K_CAP_5GHZ                  0x00000004
2363 #define MWL8K_CAP_2GHZ4                 0x00000001
2364
2365 static void
2366 mwl8k_set_ht_caps(struct ieee80211_hw *hw,
2367                   struct ieee80211_supported_band *band, u32 cap)
2368 {
2369         int rx_streams;
2370         int tx_streams;
2371
2372         band->ht_cap.ht_supported = 1;
2373
2374         if (cap & MWL8K_CAP_MAX_AMSDU)
2375                 band->ht_cap.cap |= IEEE80211_HT_CAP_MAX_AMSDU;
2376         if (cap & MWL8K_CAP_GREENFIELD)
2377                 band->ht_cap.cap |= IEEE80211_HT_CAP_GRN_FLD;
2378         if (cap & MWL8K_CAP_AMPDU) {
2379                 hw->flags |= IEEE80211_HW_AMPDU_AGGREGATION;
2380                 band->ht_cap.ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
2381                 band->ht_cap.ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE;
2382         }
2383         if (cap & MWL8K_CAP_RX_STBC)
2384                 band->ht_cap.cap |= IEEE80211_HT_CAP_RX_STBC;
2385         if (cap & MWL8K_CAP_TX_STBC)
2386                 band->ht_cap.cap |= IEEE80211_HT_CAP_TX_STBC;
2387         if (cap & MWL8K_CAP_SHORTGI_40MHZ)
2388                 band->ht_cap.cap |= IEEE80211_HT_CAP_SGI_40;
2389         if (cap & MWL8K_CAP_SHORTGI_20MHZ)
2390                 band->ht_cap.cap |= IEEE80211_HT_CAP_SGI_20;
2391         if (cap & MWL8K_CAP_DELAY_BA)
2392                 band->ht_cap.cap |= IEEE80211_HT_CAP_DELAY_BA;
2393         if (cap & MWL8K_CAP_40MHZ)
2394                 band->ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2395
2396         rx_streams = hweight32(cap & MWL8K_CAP_RX_ANTENNA_MASK);
2397         tx_streams = hweight32(cap & MWL8K_CAP_TX_ANTENNA_MASK);
2398
2399         band->ht_cap.mcs.rx_mask[0] = 0xff;
2400         if (rx_streams >= 2)
2401                 band->ht_cap.mcs.rx_mask[1] = 0xff;
2402         if (rx_streams >= 3)
2403                 band->ht_cap.mcs.rx_mask[2] = 0xff;
2404         band->ht_cap.mcs.rx_mask[4] = 0x01;
2405         band->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
2406
2407         if (rx_streams != tx_streams) {
2408                 band->ht_cap.mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
2409                 band->ht_cap.mcs.tx_params |= (tx_streams - 1) <<
2410                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
2411         }
2412 }
2413
2414 static void
2415 mwl8k_set_caps(struct ieee80211_hw *hw, u32 caps)
2416 {
2417         struct mwl8k_priv *priv = hw->priv;
2418
2419         if (priv->caps)
2420                 return;
2421
2422         if ((caps & MWL8K_CAP_2GHZ4) || !(caps & MWL8K_CAP_BAND_MASK)) {
2423                 mwl8k_setup_2ghz_band(hw);
2424                 if (caps & MWL8K_CAP_MIMO)
2425                         mwl8k_set_ht_caps(hw, &priv->band_24, caps);
2426         }
2427
2428         if (caps & MWL8K_CAP_5GHZ) {
2429                 mwl8k_setup_5ghz_band(hw);
2430                 if (caps & MWL8K_CAP_MIMO)
2431                         mwl8k_set_ht_caps(hw, &priv->band_50, caps);
2432         }
2433
2434         priv->caps = caps;
2435 }
2436
2437 static int mwl8k_cmd_get_hw_spec_sta(struct ieee80211_hw *hw)
2438 {
2439         struct mwl8k_priv *priv = hw->priv;
2440         struct mwl8k_cmd_get_hw_spec_sta *cmd;
2441         int rc;
2442         int i;
2443
2444         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2445         if (cmd == NULL)
2446                 return -ENOMEM;
2447
2448         cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_HW_SPEC);
2449         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2450
2451         memset(cmd->perm_addr, 0xff, sizeof(cmd->perm_addr));
2452         cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2453         cmd->rx_queue_ptr = cpu_to_le32(priv->rxq[0].rxd_dma);
2454         cmd->num_tx_queues = cpu_to_le32(mwl8k_tx_queues(priv));
2455         for (i = 0; i < mwl8k_tx_queues(priv); i++)
2456                 cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[i].txd_dma);
2457         cmd->num_tx_desc_per_queue = cpu_to_le32(MWL8K_TX_DESCS);
2458         cmd->total_rxd = cpu_to_le32(MWL8K_RX_DESCS);
2459
2460         rc = mwl8k_post_cmd(hw, &cmd->header);
2461
2462         if (!rc) {
2463                 SET_IEEE80211_PERM_ADDR(hw, cmd->perm_addr);
2464                 priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs);
2465                 priv->fw_rev = le32_to_cpu(cmd->fw_rev);
2466                 priv->hw_rev = cmd->hw_rev;
2467                 mwl8k_set_caps(hw, le32_to_cpu(cmd->caps));
2468                 priv->ap_macids_supported = 0x00000000;
2469                 priv->sta_macids_supported = 0x00000001;
2470         }
2471
2472         kfree(cmd);
2473         return rc;
2474 }
2475
2476 /*
2477  * CMD_GET_HW_SPEC (AP version).
2478  */
2479 struct mwl8k_cmd_get_hw_spec_ap {
2480         struct mwl8k_cmd_pkt header;
2481         __u8 hw_rev;
2482         __u8 host_interface;
2483         __le16 num_wcb;
2484         __le16 num_mcaddrs;
2485         __u8 perm_addr[ETH_ALEN];
2486         __le16 region_code;
2487         __le16 num_antenna;
2488         __le32 fw_rev;
2489         __le32 wcbbase0;
2490         __le32 rxwrptr;
2491         __le32 rxrdptr;
2492         __le32 ps_cookie;
2493         __le32 wcbbase1;
2494         __le32 wcbbase2;
2495         __le32 wcbbase3;
2496         __le32 fw_api_version;
2497         __le32 caps;
2498         __le32 num_of_ampdu_queues;
2499         __le32 wcbbase_ampdu[MWL8K_MAX_AMPDU_QUEUES];
2500 } __packed;
2501
2502 static int mwl8k_cmd_get_hw_spec_ap(struct ieee80211_hw *hw)
2503 {
2504         struct mwl8k_priv *priv = hw->priv;
2505         struct mwl8k_cmd_get_hw_spec_ap *cmd;
2506         int rc, i;
2507         u32 api_version;
2508
2509         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2510         if (cmd == NULL)
2511                 return -ENOMEM;
2512
2513         cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_HW_SPEC);
2514         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2515
2516         memset(cmd->perm_addr, 0xff, sizeof(cmd->perm_addr));
2517         cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2518
2519         rc = mwl8k_post_cmd(hw, &cmd->header);
2520
2521         if (!rc) {
2522                 int off;
2523
2524                 api_version = le32_to_cpu(cmd->fw_api_version);
2525                 if (priv->device_info->fw_api_ap != api_version) {
2526                         printk(KERN_ERR "%s: Unsupported fw API version for %s."
2527                                "  Expected %d got %d.\n", MWL8K_NAME,
2528                                priv->device_info->part_name,
2529                                priv->device_info->fw_api_ap,
2530                                api_version);
2531                         rc = -EINVAL;
2532                         goto done;
2533                 }
2534                 SET_IEEE80211_PERM_ADDR(hw, cmd->perm_addr);
2535                 priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs);
2536                 priv->fw_rev = le32_to_cpu(cmd->fw_rev);
2537                 priv->hw_rev = cmd->hw_rev;
2538                 mwl8k_set_caps(hw, le32_to_cpu(cmd->caps));
2539                 priv->ap_macids_supported = 0x000000ff;
2540                 priv->sta_macids_supported = 0x00000100;
2541                 priv->num_ampdu_queues = le32_to_cpu(cmd->num_of_ampdu_queues);
2542                 if (priv->num_ampdu_queues > MWL8K_MAX_AMPDU_QUEUES) {
2543                         wiphy_warn(hw->wiphy, "fw reported %d ampdu queues"
2544                                    " but we only support %d.\n",
2545                                    priv->num_ampdu_queues,
2546                                    MWL8K_MAX_AMPDU_QUEUES);
2547                         priv->num_ampdu_queues = MWL8K_MAX_AMPDU_QUEUES;
2548                 }
2549                 off = le32_to_cpu(cmd->rxwrptr) & 0xffff;
2550                 iowrite32(priv->rxq[0].rxd_dma, priv->sram + off);
2551
2552                 off = le32_to_cpu(cmd->rxrdptr) & 0xffff;
2553                 iowrite32(priv->rxq[0].rxd_dma, priv->sram + off);
2554
2555                 priv->txq_offset[0] = le32_to_cpu(cmd->wcbbase0) & 0xffff;
2556                 priv->txq_offset[1] = le32_to_cpu(cmd->wcbbase1) & 0xffff;
2557                 priv->txq_offset[2] = le32_to_cpu(cmd->wcbbase2) & 0xffff;
2558                 priv->txq_offset[3] = le32_to_cpu(cmd->wcbbase3) & 0xffff;
2559
2560                 for (i = 0; i < priv->num_ampdu_queues; i++)
2561                         priv->txq_offset[i + MWL8K_TX_WMM_QUEUES] =
2562                                 le32_to_cpu(cmd->wcbbase_ampdu[i]) & 0xffff;
2563         }
2564
2565 done:
2566         kfree(cmd);
2567         return rc;
2568 }
2569
2570 /*
2571  * CMD_SET_HW_SPEC.
2572  */
2573 struct mwl8k_cmd_set_hw_spec {
2574         struct mwl8k_cmd_pkt header;
2575         __u8 hw_rev;
2576         __u8 host_interface;
2577         __le16 num_mcaddrs;
2578         __u8 perm_addr[ETH_ALEN];
2579         __le16 region_code;
2580         __le32 fw_rev;
2581         __le32 ps_cookie;
2582         __le32 caps;
2583         __le32 rx_queue_ptr;
2584         __le32 num_tx_queues;
2585         __le32 tx_queue_ptrs[MWL8K_MAX_TX_QUEUES];
2586         __le32 flags;
2587         __le32 num_tx_desc_per_queue;
2588         __le32 total_rxd;
2589 } __packed;
2590
2591 /* If enabled, MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY will cause
2592  * packets to expire 500 ms after the timestamp in the tx descriptor.  That is,
2593  * the packets that are queued for more than 500ms, will be dropped in the
2594  * hardware. This helps minimizing the issues caused due to head-of-line
2595  * blocking where a slow client can hog the bandwidth and affect traffic to a
2596  * faster client.
2597  */
2598 #define MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY  0x00000400
2599 #define MWL8K_SET_HW_SPEC_FLAG_GENERATE_CCMP_HDR        0x00000200
2600 #define MWL8K_SET_HW_SPEC_FLAG_HOST_DECR_MGMT           0x00000080
2601 #define MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_PROBERESP       0x00000020
2602 #define MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_BEACON          0x00000010
2603
2604 static int mwl8k_cmd_set_hw_spec(struct ieee80211_hw *hw)
2605 {
2606         struct mwl8k_priv *priv = hw->priv;
2607         struct mwl8k_cmd_set_hw_spec *cmd;
2608         int rc;
2609         int i;
2610
2611         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2612         if (cmd == NULL)
2613                 return -ENOMEM;
2614
2615         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_HW_SPEC);
2616         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2617
2618         cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2619         cmd->rx_queue_ptr = cpu_to_le32(priv->rxq[0].rxd_dma);
2620         cmd->num_tx_queues = cpu_to_le32(mwl8k_tx_queues(priv));
2621
2622         /*
2623          * Mac80211 stack has Q0 as highest priority and Q3 as lowest in
2624          * that order. Firmware has Q3 as highest priority and Q0 as lowest
2625          * in that order. Map Q3 of mac80211 to Q0 of firmware so that the
2626          * priority is interpreted the right way in firmware.
2627          */
2628         for (i = 0; i < mwl8k_tx_queues(priv); i++) {
2629                 int j = mwl8k_tx_queues(priv) - 1 - i;
2630                 cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[j].txd_dma);
2631         }
2632
2633         cmd->flags = cpu_to_le32(MWL8K_SET_HW_SPEC_FLAG_HOST_DECR_MGMT |
2634                                  MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_PROBERESP |
2635                                  MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_BEACON |
2636                                  MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY |
2637                                  MWL8K_SET_HW_SPEC_FLAG_GENERATE_CCMP_HDR);
2638         cmd->num_tx_desc_per_queue = cpu_to_le32(MWL8K_TX_DESCS);
2639         cmd->total_rxd = cpu_to_le32(MWL8K_RX_DESCS);
2640
2641         rc = mwl8k_post_cmd(hw, &cmd->header);
2642         kfree(cmd);
2643
2644         return rc;
2645 }
2646
2647 /*
2648  * CMD_MAC_MULTICAST_ADR.
2649  */
2650 struct mwl8k_cmd_mac_multicast_adr {
2651         struct mwl8k_cmd_pkt header;
2652         __le16 action;
2653         __le16 numaddr;
2654         __u8 addr[0][ETH_ALEN];
2655 };
2656
2657 #define MWL8K_ENABLE_RX_DIRECTED        0x0001
2658 #define MWL8K_ENABLE_RX_MULTICAST       0x0002
2659 #define MWL8K_ENABLE_RX_ALL_MULTICAST   0x0004
2660 #define MWL8K_ENABLE_RX_BROADCAST       0x0008
2661
2662 static struct mwl8k_cmd_pkt *
2663 __mwl8k_cmd_mac_multicast_adr(struct ieee80211_hw *hw, int allmulti,
2664                               struct netdev_hw_addr_list *mc_list)
2665 {
2666         struct mwl8k_priv *priv = hw->priv;
2667         struct mwl8k_cmd_mac_multicast_adr *cmd;
2668         int size;
2669         int mc_count = 0;
2670
2671         if (mc_list)
2672                 mc_count = netdev_hw_addr_list_count(mc_list);
2673
2674         if (allmulti || mc_count > priv->num_mcaddrs) {
2675                 allmulti = 1;
2676                 mc_count = 0;
2677         }
2678
2679         size = sizeof(*cmd) + mc_count * ETH_ALEN;
2680
2681         cmd = kzalloc(size, GFP_ATOMIC);
2682         if (cmd == NULL)
2683                 return NULL;
2684
2685         cmd->header.code = cpu_to_le16(MWL8K_CMD_MAC_MULTICAST_ADR);
2686         cmd->header.length = cpu_to_le16(size);
2687         cmd->action = cpu_to_le16(MWL8K_ENABLE_RX_DIRECTED |
2688                                   MWL8K_ENABLE_RX_BROADCAST);
2689
2690         if (allmulti) {
2691                 cmd->action |= cpu_to_le16(MWL8K_ENABLE_RX_ALL_MULTICAST);
2692         } else if (mc_count) {
2693                 struct netdev_hw_addr *ha;
2694                 int i = 0;
2695
2696                 cmd->action |= cpu_to_le16(MWL8K_ENABLE_RX_MULTICAST);
2697                 cmd->numaddr = cpu_to_le16(mc_count);
2698                 netdev_hw_addr_list_for_each(ha, mc_list) {
2699                         memcpy(cmd->addr[i], ha->addr, ETH_ALEN);
2700                 }
2701         }
2702
2703         return &cmd->header;
2704 }
2705
2706 /*
2707  * CMD_GET_STAT.
2708  */
2709 struct mwl8k_cmd_get_stat {
2710         struct mwl8k_cmd_pkt header;
2711         __le32 stats[64];
2712 } __packed;
2713
2714 #define MWL8K_STAT_ACK_FAILURE  9
2715 #define MWL8K_STAT_RTS_FAILURE  12
2716 #define MWL8K_STAT_FCS_ERROR    24
2717 #define MWL8K_STAT_RTS_SUCCESS  11
2718
2719 static int mwl8k_cmd_get_stat(struct ieee80211_hw *hw,
2720                               struct ieee80211_low_level_stats *stats)
2721 {
2722         struct mwl8k_cmd_get_stat *cmd;
2723         int rc;
2724
2725         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2726         if (cmd == NULL)
2727                 return -ENOMEM;
2728
2729         cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_STAT);
2730         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2731
2732         rc = mwl8k_post_cmd(hw, &cmd->header);
2733         if (!rc) {
2734                 stats->dot11ACKFailureCount =
2735                         le32_to_cpu(cmd->stats[MWL8K_STAT_ACK_FAILURE]);
2736                 stats->dot11RTSFailureCount =
2737                         le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_FAILURE]);
2738                 stats->dot11FCSErrorCount =
2739                         le32_to_cpu(cmd->stats[MWL8K_STAT_FCS_ERROR]);
2740                 stats->dot11RTSSuccessCount =
2741                         le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_SUCCESS]);
2742         }
2743         kfree(cmd);
2744
2745         return rc;
2746 }
2747
2748 /*
2749  * CMD_RADIO_CONTROL.
2750  */
2751 struct mwl8k_cmd_radio_control {
2752         struct mwl8k_cmd_pkt header;
2753         __le16 action;
2754         __le16 control;
2755         __le16 radio_on;
2756 } __packed;
2757
2758 static int
2759 mwl8k_cmd_radio_control(struct ieee80211_hw *hw, bool enable, bool force)
2760 {
2761         struct mwl8k_priv *priv = hw->priv;
2762         struct mwl8k_cmd_radio_control *cmd;
2763         int rc;
2764
2765         if (enable == priv->radio_on && !force)
2766                 return 0;
2767
2768         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2769         if (cmd == NULL)
2770                 return -ENOMEM;
2771
2772         cmd->header.code = cpu_to_le16(MWL8K_CMD_RADIO_CONTROL);
2773         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2774         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
2775         cmd->control = cpu_to_le16(priv->radio_short_preamble ? 3 : 1);
2776         cmd->radio_on = cpu_to_le16(enable ? 0x0001 : 0x0000);
2777
2778         rc = mwl8k_post_cmd(hw, &cmd->header);
2779         kfree(cmd);
2780
2781         if (!rc)
2782                 priv->radio_on = enable;
2783
2784         return rc;
2785 }
2786
2787 static int mwl8k_cmd_radio_disable(struct ieee80211_hw *hw)
2788 {
2789         return mwl8k_cmd_radio_control(hw, 0, 0);
2790 }
2791
2792 static int mwl8k_cmd_radio_enable(struct ieee80211_hw *hw)
2793 {
2794         return mwl8k_cmd_radio_control(hw, 1, 0);
2795 }
2796
2797 static int
2798 mwl8k_set_radio_preamble(struct ieee80211_hw *hw, bool short_preamble)
2799 {
2800         struct mwl8k_priv *priv = hw->priv;
2801
2802         priv->radio_short_preamble = short_preamble;
2803
2804         return mwl8k_cmd_radio_control(hw, 1, 1);
2805 }
2806
2807 /*
2808  * CMD_RF_TX_POWER.
2809  */
2810 #define MWL8K_RF_TX_POWER_LEVEL_TOTAL   8
2811
2812 struct mwl8k_cmd_rf_tx_power {
2813         struct mwl8k_cmd_pkt header;
2814         __le16 action;
2815         __le16 support_level;
2816         __le16 current_level;
2817         __le16 reserved;
2818         __le16 power_level_list[MWL8K_RF_TX_POWER_LEVEL_TOTAL];
2819 } __packed;
2820
2821 static int mwl8k_cmd_rf_tx_power(struct ieee80211_hw *hw, int dBm)
2822 {
2823         struct mwl8k_cmd_rf_tx_power *cmd;
2824         int rc;
2825
2826         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2827         if (cmd == NULL)
2828                 return -ENOMEM;
2829
2830         cmd->header.code = cpu_to_le16(MWL8K_CMD_RF_TX_POWER);
2831         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2832         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
2833         cmd->support_level = cpu_to_le16(dBm);
2834
2835         rc = mwl8k_post_cmd(hw, &cmd->header);
2836         kfree(cmd);
2837
2838         return rc;
2839 }
2840
2841 /*
2842  * CMD_TX_POWER.
2843  */
2844 #define MWL8K_TX_POWER_LEVEL_TOTAL      12
2845
2846 struct mwl8k_cmd_tx_power {
2847         struct mwl8k_cmd_pkt header;
2848         __le16 action;
2849         __le16 band;
2850         __le16 channel;
2851         __le16 bw;
2852         __le16 sub_ch;
2853         __le16 power_level_list[MWL8K_TX_POWER_LEVEL_TOTAL];
2854 } __packed;
2855
2856 static int mwl8k_cmd_tx_power(struct ieee80211_hw *hw,
2857                                      struct ieee80211_conf *conf,
2858                                      unsigned short pwr)
2859 {
2860         struct ieee80211_channel *channel = conf->chandef.chan;
2861         enum nl80211_channel_type channel_type =
2862                 cfg80211_get_chandef_type(&conf->chandef);
2863         struct mwl8k_cmd_tx_power *cmd;
2864         int rc;
2865         int i;
2866
2867         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2868         if (cmd == NULL)
2869                 return -ENOMEM;
2870
2871         cmd->header.code = cpu_to_le16(MWL8K_CMD_TX_POWER);
2872         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2873         cmd->action = cpu_to_le16(MWL8K_CMD_SET_LIST);
2874
2875         if (channel->band == IEEE80211_BAND_2GHZ)
2876                 cmd->band = cpu_to_le16(0x1);
2877         else if (channel->band == IEEE80211_BAND_5GHZ)
2878                 cmd->band = cpu_to_le16(0x4);
2879
2880         cmd->channel = cpu_to_le16(channel->hw_value);
2881
2882         if (channel_type == NL80211_CHAN_NO_HT ||
2883             channel_type == NL80211_CHAN_HT20) {
2884                 cmd->bw = cpu_to_le16(0x2);
2885         } else {
2886                 cmd->bw = cpu_to_le16(0x4);
2887                 if (channel_type == NL80211_CHAN_HT40MINUS)
2888                         cmd->sub_ch = cpu_to_le16(0x3);
2889                 else if (channel_type == NL80211_CHAN_HT40PLUS)
2890                         cmd->sub_ch = cpu_to_le16(0x1);
2891         }
2892
2893         for (i = 0; i < MWL8K_TX_POWER_LEVEL_TOTAL; i++)
2894                 cmd->power_level_list[i] = cpu_to_le16(pwr);
2895
2896         rc = mwl8k_post_cmd(hw, &cmd->header);
2897         kfree(cmd);
2898
2899         return rc;
2900 }
2901
2902 /*
2903  * CMD_RF_ANTENNA.
2904  */
2905 struct mwl8k_cmd_rf_antenna {
2906         struct mwl8k_cmd_pkt header;
2907         __le16 antenna;
2908         __le16 mode;
2909 } __packed;
2910
2911 #define MWL8K_RF_ANTENNA_RX             1
2912 #define MWL8K_RF_ANTENNA_TX             2
2913
2914 static int
2915 mwl8k_cmd_rf_antenna(struct ieee80211_hw *hw, int antenna, int mask)
2916 {
2917         struct mwl8k_cmd_rf_antenna *cmd;
2918         int rc;
2919
2920         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2921         if (cmd == NULL)
2922                 return -ENOMEM;
2923
2924         cmd->header.code = cpu_to_le16(MWL8K_CMD_RF_ANTENNA);
2925         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2926         cmd->antenna = cpu_to_le16(antenna);
2927         cmd->mode = cpu_to_le16(mask);
2928
2929         rc = mwl8k_post_cmd(hw, &cmd->header);
2930         kfree(cmd);
2931
2932         return rc;
2933 }
2934
2935 /*
2936  * CMD_SET_BEACON.
2937  */
2938 struct mwl8k_cmd_set_beacon {
2939         struct mwl8k_cmd_pkt header;
2940         __le16 beacon_len;
2941         __u8 beacon[0];
2942 };
2943
2944 static int mwl8k_cmd_set_beacon(struct ieee80211_hw *hw,
2945                                 struct ieee80211_vif *vif, u8 *beacon, int len)
2946 {
2947         struct mwl8k_cmd_set_beacon *cmd;
2948         int rc;
2949
2950         cmd = kzalloc(sizeof(*cmd) + len, GFP_KERNEL);
2951         if (cmd == NULL)
2952                 return -ENOMEM;
2953
2954         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_BEACON);
2955         cmd->header.length = cpu_to_le16(sizeof(*cmd) + len);
2956         cmd->beacon_len = cpu_to_le16(len);
2957         memcpy(cmd->beacon, beacon, len);
2958
2959         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
2960         kfree(cmd);
2961
2962         return rc;
2963 }
2964
2965 /*
2966  * CMD_SET_PRE_SCAN.
2967  */
2968 struct mwl8k_cmd_set_pre_scan {
2969         struct mwl8k_cmd_pkt header;
2970 } __packed;
2971
2972 static int mwl8k_cmd_set_pre_scan(struct ieee80211_hw *hw)
2973 {
2974         struct mwl8k_cmd_set_pre_scan *cmd;
2975         int rc;
2976
2977         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2978         if (cmd == NULL)
2979                 return -ENOMEM;
2980
2981         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_PRE_SCAN);
2982         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2983
2984         rc = mwl8k_post_cmd(hw, &cmd->header);
2985         kfree(cmd);
2986
2987         return rc;
2988 }
2989
2990 /*
2991  * CMD_SET_POST_SCAN.
2992  */
2993 struct mwl8k_cmd_set_post_scan {
2994         struct mwl8k_cmd_pkt header;
2995         __le32 isibss;
2996         __u8 bssid[ETH_ALEN];
2997 } __packed;
2998
2999 static int
3000 mwl8k_cmd_set_post_scan(struct ieee80211_hw *hw, const __u8 *mac)
3001 {
3002         struct mwl8k_cmd_set_post_scan *cmd;
3003         int rc;
3004
3005         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3006         if (cmd == NULL)
3007                 return -ENOMEM;
3008
3009         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_POST_SCAN);
3010         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3011         cmd->isibss = 0;
3012         memcpy(cmd->bssid, mac, ETH_ALEN);
3013
3014         rc = mwl8k_post_cmd(hw, &cmd->header);
3015         kfree(cmd);
3016
3017         return rc;
3018 }
3019
3020 /*
3021  * CMD_SET_RF_CHANNEL.
3022  */
3023 struct mwl8k_cmd_set_rf_channel {
3024         struct mwl8k_cmd_pkt header;
3025         __le16 action;
3026         __u8 current_channel;
3027         __le32 channel_flags;
3028 } __packed;
3029
3030 static int mwl8k_cmd_set_rf_channel(struct ieee80211_hw *hw,
3031                                     struct ieee80211_conf *conf)
3032 {
3033         struct ieee80211_channel *channel = conf->chandef.chan;
3034         enum nl80211_channel_type channel_type =
3035                 cfg80211_get_chandef_type(&conf->chandef);
3036         struct mwl8k_cmd_set_rf_channel *cmd;
3037         int rc;
3038
3039         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3040         if (cmd == NULL)
3041                 return -ENOMEM;
3042
3043         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RF_CHANNEL);
3044         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3045         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3046         cmd->current_channel = channel->hw_value;
3047
3048         if (channel->band == IEEE80211_BAND_2GHZ)
3049                 cmd->channel_flags |= cpu_to_le32(0x00000001);
3050         else if (channel->band == IEEE80211_BAND_5GHZ)
3051                 cmd->channel_flags |= cpu_to_le32(0x00000004);
3052
3053         if (channel_type == NL80211_CHAN_NO_HT ||
3054             channel_type == NL80211_CHAN_HT20)
3055                 cmd->channel_flags |= cpu_to_le32(0x00000080);
3056         else if (channel_type == NL80211_CHAN_HT40MINUS)
3057                 cmd->channel_flags |= cpu_to_le32(0x000001900);
3058         else if (channel_type == NL80211_CHAN_HT40PLUS)
3059                 cmd->channel_flags |= cpu_to_le32(0x000000900);
3060
3061         rc = mwl8k_post_cmd(hw, &cmd->header);
3062         kfree(cmd);
3063
3064         return rc;
3065 }
3066
3067 /*
3068  * CMD_SET_AID.
3069  */
3070 #define MWL8K_FRAME_PROT_DISABLED                       0x00
3071 #define MWL8K_FRAME_PROT_11G                            0x07
3072 #define MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY              0x02
3073 #define MWL8K_FRAME_PROT_11N_HT_ALL                     0x06
3074
3075 struct mwl8k_cmd_update_set_aid {
3076         struct  mwl8k_cmd_pkt header;
3077         __le16  aid;
3078
3079          /* AP's MAC address (BSSID) */
3080         __u8    bssid[ETH_ALEN];
3081         __le16  protection_mode;
3082         __u8    supp_rates[14];
3083 } __packed;
3084
3085 static void legacy_rate_mask_to_array(u8 *rates, u32 mask)
3086 {
3087         int i;
3088         int j;
3089
3090         /*
3091          * Clear nonstandard rate 4.
3092          */
3093         mask &= 0x1fef;
3094
3095         for (i = 0, j = 0; i < 13; i++) {
3096                 if (mask & (1 << i))
3097                         rates[j++] = mwl8k_rates_24[i].hw_value;
3098         }
3099 }
3100
3101 static int
3102 mwl8k_cmd_set_aid(struct ieee80211_hw *hw,
3103                   struct ieee80211_vif *vif, u32 legacy_rate_mask)
3104 {
3105         struct mwl8k_cmd_update_set_aid *cmd;
3106         u16 prot_mode;
3107         int rc;
3108
3109         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3110         if (cmd == NULL)
3111                 return -ENOMEM;
3112
3113         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_AID);
3114         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3115         cmd->aid = cpu_to_le16(vif->bss_conf.aid);
3116         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
3117
3118         if (vif->bss_conf.use_cts_prot) {
3119                 prot_mode = MWL8K_FRAME_PROT_11G;
3120         } else {
3121                 switch (vif->bss_conf.ht_operation_mode &
3122                         IEEE80211_HT_OP_MODE_PROTECTION) {
3123                 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
3124                         prot_mode = MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY;
3125                         break;
3126                 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
3127                         prot_mode = MWL8K_FRAME_PROT_11N_HT_ALL;
3128                         break;
3129                 default:
3130                         prot_mode = MWL8K_FRAME_PROT_DISABLED;
3131                         break;
3132                 }
3133         }
3134         cmd->protection_mode = cpu_to_le16(prot_mode);
3135
3136         legacy_rate_mask_to_array(cmd->supp_rates, legacy_rate_mask);
3137
3138         rc = mwl8k_post_cmd(hw, &cmd->header);
3139         kfree(cmd);
3140
3141         return rc;
3142 }
3143
3144 /*
3145  * CMD_SET_RATE.
3146  */
3147 struct mwl8k_cmd_set_rate {
3148         struct  mwl8k_cmd_pkt header;
3149         __u8    legacy_rates[14];
3150
3151         /* Bitmap for supported MCS codes.  */
3152         __u8    mcs_set[16];
3153         __u8    reserved[16];
3154 } __packed;
3155
3156 static int
3157 mwl8k_cmd_set_rate(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
3158                    u32 legacy_rate_mask, u8 *mcs_rates)
3159 {
3160         struct mwl8k_cmd_set_rate *cmd;
3161         int rc;
3162
3163         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3164         if (cmd == NULL)
3165                 return -ENOMEM;
3166
3167         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATE);
3168         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3169         legacy_rate_mask_to_array(cmd->legacy_rates, legacy_rate_mask);
3170         memcpy(cmd->mcs_set, mcs_rates, 16);
3171
3172         rc = mwl8k_post_cmd(hw, &cmd->header);
3173         kfree(cmd);
3174
3175         return rc;
3176 }
3177
3178 /*
3179  * CMD_FINALIZE_JOIN.
3180  */
3181 #define MWL8K_FJ_BEACON_MAXLEN  128
3182
3183 struct mwl8k_cmd_finalize_join {
3184         struct mwl8k_cmd_pkt header;
3185         __le32 sleep_interval;  /* Number of beacon periods to sleep */
3186         __u8 beacon_data[MWL8K_FJ_BEACON_MAXLEN];
3187 } __packed;
3188
3189 static int mwl8k_cmd_finalize_join(struct ieee80211_hw *hw, void *frame,
3190                                    int framelen, int dtim)
3191 {
3192         struct mwl8k_cmd_finalize_join *cmd;
3193         struct ieee80211_mgmt *payload = frame;
3194         int payload_len;
3195         int rc;
3196
3197         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3198         if (cmd == NULL)
3199                 return -ENOMEM;
3200
3201         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_FINALIZE_JOIN);
3202         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3203         cmd->sleep_interval = cpu_to_le32(dtim ? dtim : 1);
3204
3205         payload_len = framelen - ieee80211_hdrlen(payload->frame_control);
3206         if (payload_len < 0)
3207                 payload_len = 0;
3208         else if (payload_len > MWL8K_FJ_BEACON_MAXLEN)
3209                 payload_len = MWL8K_FJ_BEACON_MAXLEN;
3210
3211         memcpy(cmd->beacon_data, &payload->u.beacon, payload_len);
3212
3213         rc = mwl8k_post_cmd(hw, &cmd->header);
3214         kfree(cmd);
3215
3216         return rc;
3217 }
3218
3219 /*
3220  * CMD_SET_RTS_THRESHOLD.
3221  */
3222 struct mwl8k_cmd_set_rts_threshold {
3223         struct mwl8k_cmd_pkt header;
3224         __le16 action;
3225         __le16 threshold;
3226 } __packed;
3227
3228 static int
3229 mwl8k_cmd_set_rts_threshold(struct ieee80211_hw *hw, int rts_thresh)
3230 {
3231         struct mwl8k_cmd_set_rts_threshold *cmd;
3232         int rc;
3233
3234         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3235         if (cmd == NULL)
3236                 return -ENOMEM;
3237
3238         cmd->header.code = cpu_to_le16(MWL8K_CMD_RTS_THRESHOLD);
3239         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3240         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3241         cmd->threshold = cpu_to_le16(rts_thresh);
3242
3243         rc = mwl8k_post_cmd(hw, &cmd->header);
3244         kfree(cmd);
3245
3246         return rc;
3247 }
3248
3249 /*
3250  * CMD_SET_SLOT.
3251  */
3252 struct mwl8k_cmd_set_slot {
3253         struct mwl8k_cmd_pkt header;
3254         __le16 action;
3255         __u8 short_slot;
3256 } __packed;
3257
3258 static int mwl8k_cmd_set_slot(struct ieee80211_hw *hw, bool short_slot_time)
3259 {
3260         struct mwl8k_cmd_set_slot *cmd;
3261         int rc;
3262
3263         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3264         if (cmd == NULL)
3265                 return -ENOMEM;
3266
3267         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_SLOT);
3268         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3269         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3270         cmd->short_slot = short_slot_time;
3271
3272         rc = mwl8k_post_cmd(hw, &cmd->header);
3273         kfree(cmd);
3274
3275         return rc;
3276 }
3277
3278 /*
3279  * CMD_SET_EDCA_PARAMS.
3280  */
3281 struct mwl8k_cmd_set_edca_params {
3282         struct mwl8k_cmd_pkt header;
3283
3284         /* See MWL8K_SET_EDCA_XXX below */
3285         __le16 action;
3286
3287         /* TX opportunity in units of 32 us */
3288         __le16 txop;
3289
3290         union {
3291                 struct {
3292                         /* Log exponent of max contention period: 0...15 */
3293                         __le32 log_cw_max;
3294
3295                         /* Log exponent of min contention period: 0...15 */
3296                         __le32 log_cw_min;
3297
3298                         /* Adaptive interframe spacing in units of 32us */
3299                         __u8 aifs;
3300
3301                         /* TX queue to configure */
3302                         __u8 txq;
3303                 } ap;
3304                 struct {
3305                         /* Log exponent of max contention period: 0...15 */
3306                         __u8 log_cw_max;
3307
3308                         /* Log exponent of min contention period: 0...15 */
3309                         __u8 log_cw_min;
3310
3311                         /* Adaptive interframe spacing in units of 32us */
3312                         __u8 aifs;
3313
3314                         /* TX queue to configure */
3315                         __u8 txq;
3316                 } sta;
3317         };
3318 } __packed;
3319
3320 #define MWL8K_SET_EDCA_CW       0x01
3321 #define MWL8K_SET_EDCA_TXOP     0x02
3322 #define MWL8K_SET_EDCA_AIFS     0x04
3323
3324 #define MWL8K_SET_EDCA_ALL      (MWL8K_SET_EDCA_CW | \
3325                                  MWL8K_SET_EDCA_TXOP | \
3326                                  MWL8K_SET_EDCA_AIFS)
3327
3328 static int
3329 mwl8k_cmd_set_edca_params(struct ieee80211_hw *hw, __u8 qnum,
3330                           __u16 cw_min, __u16 cw_max,
3331                           __u8 aifs, __u16 txop)
3332 {
3333         struct mwl8k_priv *priv = hw->priv;
3334         struct mwl8k_cmd_set_edca_params *cmd;
3335         int rc;
3336
3337         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3338         if (cmd == NULL)
3339                 return -ENOMEM;
3340
3341         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_EDCA_PARAMS);
3342         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3343         cmd->action = cpu_to_le16(MWL8K_SET_EDCA_ALL);
3344         cmd->txop = cpu_to_le16(txop);
3345         if (priv->ap_fw) {
3346                 cmd->ap.log_cw_max = cpu_to_le32(ilog2(cw_max + 1));
3347                 cmd->ap.log_cw_min = cpu_to_le32(ilog2(cw_min + 1));
3348                 cmd->ap.aifs = aifs;
3349                 cmd->ap.txq = qnum;
3350         } else {
3351                 cmd->sta.log_cw_max = (u8)ilog2(cw_max + 1);
3352                 cmd->sta.log_cw_min = (u8)ilog2(cw_min + 1);
3353                 cmd->sta.aifs = aifs;
3354                 cmd->sta.txq = qnum;
3355         }
3356
3357         rc = mwl8k_post_cmd(hw, &cmd->header);
3358         kfree(cmd);
3359
3360         return rc;
3361 }
3362
3363 /*
3364  * CMD_SET_WMM_MODE.
3365  */
3366 struct mwl8k_cmd_set_wmm_mode {
3367         struct mwl8k_cmd_pkt header;
3368         __le16 action;
3369 } __packed;
3370
3371 static int mwl8k_cmd_set_wmm_mode(struct ieee80211_hw *hw, bool enable)
3372 {
3373         struct mwl8k_priv *priv = hw->priv;
3374         struct mwl8k_cmd_set_wmm_mode *cmd;
3375         int rc;
3376
3377         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3378         if (cmd == NULL)
3379                 return -ENOMEM;
3380
3381         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_WMM_MODE);
3382         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3383         cmd->action = cpu_to_le16(!!enable);
3384
3385         rc = mwl8k_post_cmd(hw, &cmd->header);
3386         kfree(cmd);
3387
3388         if (!rc)
3389                 priv->wmm_enabled = enable;
3390
3391         return rc;
3392 }
3393
3394 /*
3395  * CMD_MIMO_CONFIG.
3396  */
3397 struct mwl8k_cmd_mimo_config {
3398         struct mwl8k_cmd_pkt header;
3399         __le32 action;
3400         __u8 rx_antenna_map;
3401         __u8 tx_antenna_map;
3402 } __packed;
3403
3404 static int mwl8k_cmd_mimo_config(struct ieee80211_hw *hw, __u8 rx, __u8 tx)
3405 {
3406         struct mwl8k_cmd_mimo_config *cmd;
3407         int rc;
3408
3409         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3410         if (cmd == NULL)
3411                 return -ENOMEM;
3412
3413         cmd->header.code = cpu_to_le16(MWL8K_CMD_MIMO_CONFIG);
3414         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3415         cmd->action = cpu_to_le32((u32)MWL8K_CMD_SET);
3416         cmd->rx_antenna_map = rx;
3417         cmd->tx_antenna_map = tx;
3418
3419         rc = mwl8k_post_cmd(hw, &cmd->header);
3420         kfree(cmd);
3421
3422         return rc;
3423 }
3424
3425 /*
3426  * CMD_USE_FIXED_RATE (STA version).
3427  */
3428 struct mwl8k_cmd_use_fixed_rate_sta {
3429         struct mwl8k_cmd_pkt header;
3430         __le32 action;
3431         __le32 allow_rate_drop;
3432         __le32 num_rates;
3433         struct {
3434                 __le32 is_ht_rate;
3435                 __le32 enable_retry;
3436                 __le32 rate;
3437                 __le32 retry_count;
3438         } rate_entry[8];
3439         __le32 rate_type;
3440         __le32 reserved1;
3441         __le32 reserved2;
3442 } __packed;
3443
3444 #define MWL8K_USE_AUTO_RATE     0x0002
3445 #define MWL8K_UCAST_RATE        0
3446
3447 static int mwl8k_cmd_use_fixed_rate_sta(struct ieee80211_hw *hw)
3448 {
3449         struct mwl8k_cmd_use_fixed_rate_sta *cmd;
3450         int rc;
3451
3452         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3453         if (cmd == NULL)
3454                 return -ENOMEM;
3455
3456         cmd->header.code = cpu_to_le16(MWL8K_CMD_USE_FIXED_RATE);
3457         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3458         cmd->action = cpu_to_le32(MWL8K_USE_AUTO_RATE);
3459         cmd->rate_type = cpu_to_le32(MWL8K_UCAST_RATE);
3460
3461         rc = mwl8k_post_cmd(hw, &cmd->header);
3462         kfree(cmd);
3463
3464         return rc;
3465 }
3466
3467 /*
3468  * CMD_USE_FIXED_RATE (AP version).
3469  */
3470 struct mwl8k_cmd_use_fixed_rate_ap {
3471         struct mwl8k_cmd_pkt header;
3472         __le32 action;
3473         __le32 allow_rate_drop;
3474         __le32 num_rates;
3475         struct mwl8k_rate_entry_ap {
3476                 __le32 is_ht_rate;
3477                 __le32 enable_retry;
3478                 __le32 rate;
3479                 __le32 retry_count;
3480         } rate_entry[4];
3481         u8 multicast_rate;
3482         u8 multicast_rate_type;
3483         u8 management_rate;
3484 } __packed;
3485
3486 static int
3487 mwl8k_cmd_use_fixed_rate_ap(struct ieee80211_hw *hw, int mcast, int mgmt)
3488 {
3489         struct mwl8k_cmd_use_fixed_rate_ap *cmd;
3490         int rc;
3491
3492         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3493         if (cmd == NULL)
3494                 return -ENOMEM;
3495
3496         cmd->header.code = cpu_to_le16(MWL8K_CMD_USE_FIXED_RATE);
3497         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3498         cmd->action = cpu_to_le32(MWL8K_USE_AUTO_RATE);
3499         cmd->multicast_rate = mcast;
3500         cmd->management_rate = mgmt;
3501
3502         rc = mwl8k_post_cmd(hw, &cmd->header);
3503         kfree(cmd);
3504
3505         return rc;
3506 }
3507
3508 /*
3509  * CMD_ENABLE_SNIFFER.
3510  */
3511 struct mwl8k_cmd_enable_sniffer {
3512         struct mwl8k_cmd_pkt header;
3513         __le32 action;
3514 } __packed;
3515
3516 static int mwl8k_cmd_enable_sniffer(struct ieee80211_hw *hw, bool enable)
3517 {
3518         struct mwl8k_cmd_enable_sniffer *cmd;
3519         int rc;
3520
3521         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3522         if (cmd == NULL)
3523                 return -ENOMEM;
3524
3525         cmd->header.code = cpu_to_le16(MWL8K_CMD_ENABLE_SNIFFER);
3526         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3527         cmd->action = cpu_to_le32(!!enable);
3528
3529         rc = mwl8k_post_cmd(hw, &cmd->header);
3530         kfree(cmd);
3531
3532         return rc;
3533 }
3534
3535 struct mwl8k_cmd_update_mac_addr {
3536         struct mwl8k_cmd_pkt header;
3537         union {
3538                 struct {
3539                         __le16 mac_type;
3540                         __u8 mac_addr[ETH_ALEN];
3541                 } mbss;
3542                 __u8 mac_addr[ETH_ALEN];
3543         };
3544 } __packed;
3545
3546 #define MWL8K_MAC_TYPE_PRIMARY_CLIENT           0
3547 #define MWL8K_MAC_TYPE_SECONDARY_CLIENT         1
3548 #define MWL8K_MAC_TYPE_PRIMARY_AP               2
3549 #define MWL8K_MAC_TYPE_SECONDARY_AP             3
3550
3551 static int mwl8k_cmd_update_mac_addr(struct ieee80211_hw *hw,
3552                                   struct ieee80211_vif *vif, u8 *mac, bool set)
3553 {
3554         struct mwl8k_priv *priv = hw->priv;
3555         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
3556         struct mwl8k_cmd_update_mac_addr *cmd;
3557         int mac_type;
3558         int rc;
3559
3560         mac_type = MWL8K_MAC_TYPE_PRIMARY_AP;
3561         if (vif != NULL && vif->type == NL80211_IFTYPE_STATION) {
3562                 if (mwl8k_vif->macid + 1 == ffs(priv->sta_macids_supported))
3563                         if (priv->ap_fw)
3564                                 mac_type = MWL8K_MAC_TYPE_SECONDARY_CLIENT;
3565                         else
3566                                 mac_type = MWL8K_MAC_TYPE_PRIMARY_CLIENT;
3567                 else
3568                         mac_type = MWL8K_MAC_TYPE_SECONDARY_CLIENT;
3569         } else if (vif != NULL && vif->type == NL80211_IFTYPE_AP) {
3570                 if (mwl8k_vif->macid + 1 == ffs(priv->ap_macids_supported))
3571                         mac_type = MWL8K_MAC_TYPE_PRIMARY_AP;
3572                 else
3573                         mac_type = MWL8K_MAC_TYPE_SECONDARY_AP;
3574         }
3575
3576         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3577         if (cmd == NULL)
3578                 return -ENOMEM;
3579
3580         if (set)
3581                 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_MAC_ADDR);
3582         else
3583                 cmd->header.code = cpu_to_le16(MWL8K_CMD_DEL_MAC_ADDR);
3584
3585         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3586         if (priv->ap_fw) {
3587                 cmd->mbss.mac_type = cpu_to_le16(mac_type);
3588                 memcpy(cmd->mbss.mac_addr, mac, ETH_ALEN);
3589         } else {
3590                 memcpy(cmd->mac_addr, mac, ETH_ALEN);
3591         }
3592
3593         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3594         kfree(cmd);
3595
3596         return rc;
3597 }
3598
3599 /*
3600  * MWL8K_CMD_SET_MAC_ADDR.
3601  */
3602 static inline int mwl8k_cmd_set_mac_addr(struct ieee80211_hw *hw,
3603                                   struct ieee80211_vif *vif, u8 *mac)
3604 {
3605         return mwl8k_cmd_update_mac_addr(hw, vif, mac, true);
3606 }
3607
3608 /*
3609  * MWL8K_CMD_DEL_MAC_ADDR.
3610  */
3611 static inline int mwl8k_cmd_del_mac_addr(struct ieee80211_hw *hw,
3612                                   struct ieee80211_vif *vif, u8 *mac)
3613 {
3614         return mwl8k_cmd_update_mac_addr(hw, vif, mac, false);
3615 }
3616
3617 /*
3618  * CMD_SET_RATEADAPT_MODE.
3619  */
3620 struct mwl8k_cmd_set_rate_adapt_mode {
3621         struct mwl8k_cmd_pkt header;
3622         __le16 action;
3623         __le16 mode;
3624 } __packed;
3625
3626 static int mwl8k_cmd_set_rateadapt_mode(struct ieee80211_hw *hw, __u16 mode)
3627 {
3628         struct mwl8k_cmd_set_rate_adapt_mode *cmd;
3629         int rc;
3630
3631         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3632         if (cmd == NULL)
3633                 return -ENOMEM;
3634
3635         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATEADAPT_MODE);
3636         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3637         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3638         cmd->mode = cpu_to_le16(mode);
3639
3640         rc = mwl8k_post_cmd(hw, &cmd->header);
3641         kfree(cmd);
3642
3643         return rc;
3644 }
3645
3646 /*
3647  * CMD_GET_WATCHDOG_BITMAP.
3648  */
3649 struct mwl8k_cmd_get_watchdog_bitmap {
3650         struct mwl8k_cmd_pkt header;
3651         u8      bitmap;
3652 } __packed;
3653
3654 static int mwl8k_cmd_get_watchdog_bitmap(struct ieee80211_hw *hw, u8 *bitmap)
3655 {
3656         struct mwl8k_cmd_get_watchdog_bitmap *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_GET_WATCHDOG_BITMAP);
3664         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3665
3666         rc = mwl8k_post_cmd(hw, &cmd->header);
3667         if (!rc)
3668                 *bitmap = cmd->bitmap;
3669
3670         kfree(cmd);
3671
3672         return rc;
3673 }
3674
3675 #define MWL8K_WMM_QUEUE_NUMBER  3
3676
3677 static void mwl8k_destroy_ba(struct ieee80211_hw *hw,
3678                              u8 idx);
3679
3680 static void mwl8k_watchdog_ba_events(struct work_struct *work)
3681 {
3682         int rc;
3683         u8 bitmap = 0, stream_index;
3684         struct mwl8k_ampdu_stream *streams;
3685         struct mwl8k_priv *priv =
3686                 container_of(work, struct mwl8k_priv, watchdog_ba_handle);
3687         struct ieee80211_hw *hw = priv->hw;
3688         int i;
3689         u32 status = 0;
3690
3691         mwl8k_fw_lock(hw);
3692
3693         rc = mwl8k_cmd_get_watchdog_bitmap(priv->hw, &bitmap);
3694         if (rc)
3695                 goto done;
3696
3697         spin_lock(&priv->stream_lock);
3698
3699         /* the bitmap is the hw queue number.  Map it to the ampdu queue. */
3700         for (i = 0; i < TOTAL_HW_TX_QUEUES; i++) {
3701                 if (bitmap & (1 << i)) {
3702                         stream_index = (i + MWL8K_WMM_QUEUE_NUMBER) %
3703                                        TOTAL_HW_TX_QUEUES;
3704                         streams = &priv->ampdu[stream_index];
3705                         if (streams->state == AMPDU_STREAM_ACTIVE) {
3706                                 ieee80211_stop_tx_ba_session(streams->sta,
3707                                                              streams->tid);
3708                                 spin_unlock(&priv->stream_lock);
3709                                 mwl8k_destroy_ba(hw, stream_index);
3710                                 spin_lock(&priv->stream_lock);
3711                         }
3712                 }
3713         }
3714
3715         spin_unlock(&priv->stream_lock);
3716 done:
3717         atomic_dec(&priv->watchdog_event_pending);
3718         status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
3719         iowrite32((status | MWL8K_A2H_INT_BA_WATCHDOG),
3720                   priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
3721         mwl8k_fw_unlock(hw);
3722         return;
3723 }
3724
3725
3726 /*
3727  * CMD_BSS_START.
3728  */
3729 struct mwl8k_cmd_bss_start {
3730         struct mwl8k_cmd_pkt header;
3731         __le32 enable;
3732 } __packed;
3733
3734 static int mwl8k_cmd_bss_start(struct ieee80211_hw *hw,
3735                                struct ieee80211_vif *vif, int enable)
3736 {
3737         struct mwl8k_cmd_bss_start *cmd;
3738         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
3739         struct mwl8k_priv *priv = hw->priv;
3740         int rc;
3741
3742         if (enable && (priv->running_bsses & (1 << mwl8k_vif->macid)))
3743                 return 0;
3744
3745         if (!enable && !(priv->running_bsses & (1 << mwl8k_vif->macid)))
3746                 return 0;
3747
3748         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3749         if (cmd == NULL)
3750                 return -ENOMEM;
3751
3752         cmd->header.code = cpu_to_le16(MWL8K_CMD_BSS_START);
3753         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3754         cmd->enable = cpu_to_le32(enable);
3755
3756         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3757         kfree(cmd);
3758
3759         if (!rc) {
3760                 if (enable)
3761                         priv->running_bsses |= (1 << mwl8k_vif->macid);
3762                 else
3763                         priv->running_bsses &= ~(1 << mwl8k_vif->macid);
3764         }
3765         return rc;
3766 }
3767
3768 static void mwl8k_enable_bsses(struct ieee80211_hw *hw, bool enable, u32 bitmap)
3769 {
3770         struct mwl8k_priv *priv = hw->priv;
3771         struct mwl8k_vif *mwl8k_vif, *tmp_vif;
3772         struct ieee80211_vif *vif;
3773
3774         list_for_each_entry_safe(mwl8k_vif, tmp_vif, &priv->vif_list, list) {
3775                 vif = mwl8k_vif->vif;
3776
3777                 if (!(bitmap & (1 << mwl8k_vif->macid)))
3778                         continue;
3779
3780                 if (vif->type == NL80211_IFTYPE_AP)
3781                         mwl8k_cmd_bss_start(hw, vif, enable);
3782         }
3783 }
3784 /*
3785  * CMD_BASTREAM.
3786  */
3787
3788 /*
3789  * UPSTREAM is tx direction
3790  */
3791 #define BASTREAM_FLAG_DIRECTION_UPSTREAM        0x00
3792 #define BASTREAM_FLAG_IMMEDIATE_TYPE            0x01
3793
3794 enum ba_stream_action_type {
3795         MWL8K_BA_CREATE,
3796         MWL8K_BA_UPDATE,
3797         MWL8K_BA_DESTROY,
3798         MWL8K_BA_FLUSH,
3799         MWL8K_BA_CHECK,
3800 };
3801
3802
3803 struct mwl8k_create_ba_stream {
3804         __le32  flags;
3805         __le32  idle_thrs;
3806         __le32  bar_thrs;
3807         __le32  window_size;
3808         u8      peer_mac_addr[6];
3809         u8      dialog_token;
3810         u8      tid;
3811         u8      queue_id;
3812         u8      param_info;
3813         __le32  ba_context;
3814         u8      reset_seq_no_flag;
3815         __le16  curr_seq_no;
3816         u8      sta_src_mac_addr[6];
3817 } __packed;
3818
3819 struct mwl8k_destroy_ba_stream {
3820         __le32  flags;
3821         __le32  ba_context;
3822 } __packed;
3823
3824 struct mwl8k_cmd_bastream {
3825         struct mwl8k_cmd_pkt    header;
3826         __le32  action;
3827         union {
3828                 struct mwl8k_create_ba_stream   create_params;
3829                 struct mwl8k_destroy_ba_stream  destroy_params;
3830         };
3831 } __packed;
3832
3833 static int
3834 mwl8k_check_ba(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream,
3835                struct ieee80211_vif *vif)
3836 {
3837         struct mwl8k_cmd_bastream *cmd;
3838         int rc;
3839
3840         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3841         if (cmd == NULL)
3842                 return -ENOMEM;
3843
3844         cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
3845         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3846
3847         cmd->action = cpu_to_le32(MWL8K_BA_CHECK);
3848
3849         cmd->create_params.queue_id = stream->idx;
3850         memcpy(&cmd->create_params.peer_mac_addr[0], stream->sta->addr,
3851                ETH_ALEN);
3852         cmd->create_params.tid = stream->tid;
3853
3854         cmd->create_params.flags =
3855                 cpu_to_le32(BASTREAM_FLAG_IMMEDIATE_TYPE) |
3856                 cpu_to_le32(BASTREAM_FLAG_DIRECTION_UPSTREAM);
3857
3858         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3859
3860         kfree(cmd);
3861
3862         return rc;
3863 }
3864
3865 static int
3866 mwl8k_create_ba(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream,
3867                 u8 buf_size, struct ieee80211_vif *vif)
3868 {
3869         struct mwl8k_cmd_bastream *cmd;
3870         int rc;
3871
3872         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3873         if (cmd == NULL)
3874                 return -ENOMEM;
3875
3876
3877         cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
3878         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3879
3880         cmd->action = cpu_to_le32(MWL8K_BA_CREATE);
3881
3882         cmd->create_params.bar_thrs = cpu_to_le32((u32)buf_size);
3883         cmd->create_params.window_size = cpu_to_le32((u32)buf_size);
3884         cmd->create_params.queue_id = stream->idx;
3885
3886         memcpy(cmd->create_params.peer_mac_addr, stream->sta->addr, ETH_ALEN);
3887         cmd->create_params.tid = stream->tid;
3888         cmd->create_params.curr_seq_no = cpu_to_le16(0);
3889         cmd->create_params.reset_seq_no_flag = 1;
3890
3891         cmd->create_params.param_info =
3892                 (stream->sta->ht_cap.ampdu_factor &
3893                  IEEE80211_HT_AMPDU_PARM_FACTOR) |
3894                 ((stream->sta->ht_cap.ampdu_density << 2) &
3895                  IEEE80211_HT_AMPDU_PARM_DENSITY);
3896
3897         cmd->create_params.flags =
3898                 cpu_to_le32(BASTREAM_FLAG_IMMEDIATE_TYPE |
3899                                         BASTREAM_FLAG_DIRECTION_UPSTREAM);
3900
3901         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3902
3903         wiphy_debug(hw->wiphy, "Created a BA stream for %pM : tid %d\n",
3904                 stream->sta->addr, stream->tid);
3905         kfree(cmd);
3906
3907         return rc;
3908 }
3909
3910 static void mwl8k_destroy_ba(struct ieee80211_hw *hw,
3911                              u8 idx)
3912 {
3913         struct mwl8k_cmd_bastream *cmd;
3914
3915         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3916         if (cmd == NULL)
3917                 return;
3918
3919         cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
3920         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3921         cmd->action = cpu_to_le32(MWL8K_BA_DESTROY);
3922
3923         cmd->destroy_params.ba_context = cpu_to_le32(idx);
3924         mwl8k_post_cmd(hw, &cmd->header);
3925
3926         wiphy_debug(hw->wiphy, "Deleted BA stream index %d\n", idx);
3927
3928         kfree(cmd);
3929 }
3930
3931 /*
3932  * CMD_SET_NEW_STN.
3933  */
3934 struct mwl8k_cmd_set_new_stn {
3935         struct mwl8k_cmd_pkt header;
3936         __le16 aid;
3937         __u8 mac_addr[6];
3938         __le16 stn_id;
3939         __le16 action;
3940         __le16 rsvd;
3941         __le32 legacy_rates;
3942         __u8 ht_rates[4];
3943         __le16 cap_info;
3944         __le16 ht_capabilities_info;
3945         __u8 mac_ht_param_info;
3946         __u8 rev;
3947         __u8 control_channel;
3948         __u8 add_channel;
3949         __le16 op_mode;
3950         __le16 stbc;
3951         __u8 add_qos_info;
3952         __u8 is_qos_sta;
3953         __le32 fw_sta_ptr;
3954 } __packed;
3955
3956 #define MWL8K_STA_ACTION_ADD            0
3957 #define MWL8K_STA_ACTION_REMOVE         2
3958
3959 static int mwl8k_cmd_set_new_stn_add(struct ieee80211_hw *hw,
3960                                      struct ieee80211_vif *vif,
3961                                      struct ieee80211_sta *sta)
3962 {
3963         struct mwl8k_cmd_set_new_stn *cmd;
3964         u32 rates;
3965         int rc;
3966
3967         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3968         if (cmd == NULL)
3969                 return -ENOMEM;
3970
3971         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
3972         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3973         cmd->aid = cpu_to_le16(sta->aid);
3974         memcpy(cmd->mac_addr, sta->addr, ETH_ALEN);
3975         cmd->stn_id = cpu_to_le16(sta->aid);
3976         cmd->action = cpu_to_le16(MWL8K_STA_ACTION_ADD);
3977         if (hw->conf.chandef.chan->band == IEEE80211_BAND_2GHZ)
3978                 rates = sta->supp_rates[IEEE80211_BAND_2GHZ];
3979         else
3980                 rates = sta->supp_rates[IEEE80211_BAND_5GHZ] << 5;
3981         cmd->legacy_rates = cpu_to_le32(rates);
3982         if (sta->ht_cap.ht_supported) {
3983                 cmd->ht_rates[0] = sta->ht_cap.mcs.rx_mask[0];
3984                 cmd->ht_rates[1] = sta->ht_cap.mcs.rx_mask[1];
3985                 cmd->ht_rates[2] = sta->ht_cap.mcs.rx_mask[2];
3986                 cmd->ht_rates[3] = sta->ht_cap.mcs.rx_mask[3];
3987                 cmd->ht_capabilities_info = cpu_to_le16(sta->ht_cap.cap);
3988                 cmd->mac_ht_param_info = (sta->ht_cap.ampdu_factor & 3) |
3989                         ((sta->ht_cap.ampdu_density & 7) << 2);
3990                 cmd->is_qos_sta = 1;
3991         }
3992
3993         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3994         kfree(cmd);
3995
3996         return rc;
3997 }
3998
3999 static int mwl8k_cmd_set_new_stn_add_self(struct ieee80211_hw *hw,
4000                                           struct ieee80211_vif *vif)
4001 {
4002         struct mwl8k_cmd_set_new_stn *cmd;
4003         int rc;
4004
4005         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4006         if (cmd == NULL)
4007                 return -ENOMEM;
4008
4009         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4010         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4011         memcpy(cmd->mac_addr, vif->addr, ETH_ALEN);
4012
4013         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4014         kfree(cmd);
4015
4016         return rc;
4017 }
4018
4019 static int mwl8k_cmd_set_new_stn_del(struct ieee80211_hw *hw,
4020                                      struct ieee80211_vif *vif, u8 *addr)
4021 {
4022         struct mwl8k_cmd_set_new_stn *cmd;
4023         struct mwl8k_priv *priv = hw->priv;
4024         int rc, i;
4025         u8 idx;
4026
4027         spin_lock(&priv->stream_lock);
4028         /* Destroy any active ampdu streams for this sta */
4029         for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
4030                 struct mwl8k_ampdu_stream *s;
4031                 s = &priv->ampdu[i];
4032                 if (s->state != AMPDU_NO_STREAM) {
4033                         if (memcmp(s->sta->addr, addr, ETH_ALEN) == 0) {
4034                                 if (s->state == AMPDU_STREAM_ACTIVE) {
4035                                         idx = s->idx;
4036                                         spin_unlock(&priv->stream_lock);
4037                                         mwl8k_destroy_ba(hw, idx);
4038                                         spin_lock(&priv->stream_lock);
4039                                 } else if (s->state == AMPDU_STREAM_NEW) {
4040                                         mwl8k_remove_stream(hw, s);
4041                                 }
4042                         }
4043                 }
4044         }
4045
4046         spin_unlock(&priv->stream_lock);
4047
4048         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4049         if (cmd == NULL)
4050                 return -ENOMEM;
4051
4052         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4053         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4054         memcpy(cmd->mac_addr, addr, ETH_ALEN);
4055         cmd->action = cpu_to_le16(MWL8K_STA_ACTION_REMOVE);
4056
4057         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4058         kfree(cmd);
4059
4060         return rc;
4061 }
4062
4063 /*
4064  * CMD_UPDATE_ENCRYPTION.
4065  */
4066
4067 #define MAX_ENCR_KEY_LENGTH     16
4068 #define MIC_KEY_LENGTH          8
4069
4070 struct mwl8k_cmd_update_encryption {
4071         struct mwl8k_cmd_pkt header;
4072
4073         __le32 action;
4074         __le32 reserved;
4075         __u8 mac_addr[6];
4076         __u8 encr_type;
4077
4078 } __packed;
4079
4080 struct mwl8k_cmd_set_key {
4081         struct mwl8k_cmd_pkt header;
4082
4083         __le32 action;
4084         __le32 reserved;
4085         __le16 length;
4086         __le16 key_type_id;
4087         __le32 key_info;
4088         __le32 key_id;
4089         __le16 key_len;
4090         __u8 key_material[MAX_ENCR_KEY_LENGTH];
4091         __u8 tkip_tx_mic_key[MIC_KEY_LENGTH];
4092         __u8 tkip_rx_mic_key[MIC_KEY_LENGTH];
4093         __le16 tkip_rsc_low;
4094         __le32 tkip_rsc_high;
4095         __le16 tkip_tsc_low;
4096         __le32 tkip_tsc_high;
4097         __u8 mac_addr[6];
4098 } __packed;
4099
4100 enum {
4101         MWL8K_ENCR_ENABLE,
4102         MWL8K_ENCR_SET_KEY,
4103         MWL8K_ENCR_REMOVE_KEY,
4104         MWL8K_ENCR_SET_GROUP_KEY,
4105 };
4106
4107 #define MWL8K_UPDATE_ENCRYPTION_TYPE_WEP        0
4108 #define MWL8K_UPDATE_ENCRYPTION_TYPE_DISABLE    1
4109 #define MWL8K_UPDATE_ENCRYPTION_TYPE_TKIP       4
4110 #define MWL8K_UPDATE_ENCRYPTION_TYPE_MIXED      7
4111 #define MWL8K_UPDATE_ENCRYPTION_TYPE_AES        8
4112
4113 enum {
4114         MWL8K_ALG_WEP,
4115         MWL8K_ALG_TKIP,
4116         MWL8K_ALG_CCMP,
4117 };
4118
4119 #define MWL8K_KEY_FLAG_TXGROUPKEY       0x00000004
4120 #define MWL8K_KEY_FLAG_PAIRWISE         0x00000008
4121 #define MWL8K_KEY_FLAG_TSC_VALID        0x00000040
4122 #define MWL8K_KEY_FLAG_WEP_TXKEY        0x01000000
4123 #define MWL8K_KEY_FLAG_MICKEY_VALID     0x02000000
4124
4125 static int mwl8k_cmd_update_encryption_enable(struct ieee80211_hw *hw,
4126                                               struct ieee80211_vif *vif,
4127                                               u8 *addr,
4128                                               u8 encr_type)
4129 {
4130         struct mwl8k_cmd_update_encryption *cmd;
4131         int rc;
4132
4133         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4134         if (cmd == NULL)
4135                 return -ENOMEM;
4136
4137         cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_ENCRYPTION);
4138         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4139         cmd->action = cpu_to_le32(MWL8K_ENCR_ENABLE);
4140         memcpy(cmd->mac_addr, addr, ETH_ALEN);
4141         cmd->encr_type = encr_type;
4142
4143         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4144         kfree(cmd);
4145
4146         return rc;
4147 }
4148
4149 static int mwl8k_encryption_set_cmd_info(struct mwl8k_cmd_set_key *cmd,
4150                                                 u8 *addr,
4151                                                 struct ieee80211_key_conf *key)
4152 {
4153         cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_ENCRYPTION);
4154         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4155         cmd->length = cpu_to_le16(sizeof(*cmd) -
4156                                 offsetof(struct mwl8k_cmd_set_key, length));
4157         cmd->key_id = cpu_to_le32(key->keyidx);
4158         cmd->key_len = cpu_to_le16(key->keylen);
4159         memcpy(cmd->mac_addr, addr, ETH_ALEN);
4160
4161         switch (key->cipher) {
4162         case WLAN_CIPHER_SUITE_WEP40:
4163         case WLAN_CIPHER_SUITE_WEP104:
4164                 cmd->key_type_id = cpu_to_le16(MWL8K_ALG_WEP);
4165                 if (key->keyidx == 0)
4166                         cmd->key_info = cpu_to_le32(MWL8K_KEY_FLAG_WEP_TXKEY);
4167
4168                 break;
4169         case WLAN_CIPHER_SUITE_TKIP:
4170                 cmd->key_type_id = cpu_to_le16(MWL8K_ALG_TKIP);
4171                 cmd->key_info = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4172                         ? cpu_to_le32(MWL8K_KEY_FLAG_PAIRWISE)
4173                         : cpu_to_le32(MWL8K_KEY_FLAG_TXGROUPKEY);
4174                 cmd->key_info |= cpu_to_le32(MWL8K_KEY_FLAG_MICKEY_VALID
4175                                                 | MWL8K_KEY_FLAG_TSC_VALID);
4176                 break;
4177         case WLAN_CIPHER_SUITE_CCMP:
4178                 cmd->key_type_id = cpu_to_le16(MWL8K_ALG_CCMP);
4179                 cmd->key_info = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4180                         ? cpu_to_le32(MWL8K_KEY_FLAG_PAIRWISE)
4181                         : cpu_to_le32(MWL8K_KEY_FLAG_TXGROUPKEY);
4182                 break;
4183         default:
4184                 return -ENOTSUPP;
4185         }
4186
4187         return 0;
4188 }
4189
4190 static int mwl8k_cmd_encryption_set_key(struct ieee80211_hw *hw,
4191                                                 struct ieee80211_vif *vif,
4192                                                 u8 *addr,
4193                                                 struct ieee80211_key_conf *key)
4194 {
4195         struct mwl8k_cmd_set_key *cmd;
4196         int rc;
4197         int keymlen;
4198         u32 action;
4199         u8 idx;
4200         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4201
4202         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4203         if (cmd == NULL)
4204                 return -ENOMEM;
4205
4206         rc = mwl8k_encryption_set_cmd_info(cmd, addr, key);
4207         if (rc < 0)
4208                 goto done;
4209
4210         idx = key->keyidx;
4211
4212         if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4213                 action = MWL8K_ENCR_SET_KEY;
4214         else
4215                 action = MWL8K_ENCR_SET_GROUP_KEY;
4216
4217         switch (key->cipher) {
4218         case WLAN_CIPHER_SUITE_WEP40:
4219         case WLAN_CIPHER_SUITE_WEP104:
4220                 if (!mwl8k_vif->wep_key_conf[idx].enabled) {
4221                         memcpy(mwl8k_vif->wep_key_conf[idx].key, key,
4222                                                 sizeof(*key) + key->keylen);
4223                         mwl8k_vif->wep_key_conf[idx].enabled = 1;
4224                 }
4225
4226                 keymlen = key->keylen;
4227                 action = MWL8K_ENCR_SET_KEY;
4228                 break;
4229         case WLAN_CIPHER_SUITE_TKIP:
4230                 keymlen = MAX_ENCR_KEY_LENGTH + 2 * MIC_KEY_LENGTH;
4231                 break;
4232         case WLAN_CIPHER_SUITE_CCMP:
4233                 keymlen = key->keylen;
4234                 break;
4235         default:
4236                 rc = -ENOTSUPP;
4237                 goto done;
4238         }
4239
4240         memcpy(cmd->key_material, key->key, keymlen);
4241         cmd->action = cpu_to_le32(action);
4242
4243         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4244 done:
4245         kfree(cmd);
4246
4247         return rc;
4248 }
4249
4250 static int mwl8k_cmd_encryption_remove_key(struct ieee80211_hw *hw,
4251                                                 struct ieee80211_vif *vif,
4252                                                 u8 *addr,
4253                                                 struct ieee80211_key_conf *key)
4254 {
4255         struct mwl8k_cmd_set_key *cmd;
4256         int rc;
4257         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4258
4259         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4260         if (cmd == NULL)
4261                 return -ENOMEM;
4262
4263         rc = mwl8k_encryption_set_cmd_info(cmd, addr, key);
4264         if (rc < 0)
4265                 goto done;
4266
4267         if (key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
4268                         key->cipher == WLAN_CIPHER_SUITE_WEP104)
4269                 mwl8k_vif->wep_key_conf[key->keyidx].enabled = 0;
4270
4271         cmd->action = cpu_to_le32(MWL8K_ENCR_REMOVE_KEY);
4272
4273         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4274 done:
4275         kfree(cmd);
4276
4277         return rc;
4278 }
4279
4280 static int mwl8k_set_key(struct ieee80211_hw *hw,
4281                          enum set_key_cmd cmd_param,
4282                          struct ieee80211_vif *vif,
4283                          struct ieee80211_sta *sta,
4284                          struct ieee80211_key_conf *key)
4285 {
4286         int rc = 0;
4287         u8 encr_type;
4288         u8 *addr;
4289         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4290         struct mwl8k_priv *priv = hw->priv;
4291
4292         if (vif->type == NL80211_IFTYPE_STATION && !priv->ap_fw)
4293                 return -EOPNOTSUPP;
4294
4295         if (sta == NULL)
4296                 addr = vif->addr;
4297         else
4298                 addr = sta->addr;
4299
4300         if (cmd_param == SET_KEY) {
4301                 rc = mwl8k_cmd_encryption_set_key(hw, vif, addr, key);
4302                 if (rc)
4303                         goto out;
4304
4305                 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40)
4306                                 || (key->cipher == WLAN_CIPHER_SUITE_WEP104))
4307                         encr_type = MWL8K_UPDATE_ENCRYPTION_TYPE_WEP;
4308                 else
4309                         encr_type = MWL8K_UPDATE_ENCRYPTION_TYPE_MIXED;
4310
4311                 rc = mwl8k_cmd_update_encryption_enable(hw, vif, addr,
4312                                                                 encr_type);
4313                 if (rc)
4314                         goto out;
4315
4316                 mwl8k_vif->is_hw_crypto_enabled = true;
4317
4318         } else {
4319                 rc = mwl8k_cmd_encryption_remove_key(hw, vif, addr, key);
4320
4321                 if (rc)
4322                         goto out;
4323         }
4324 out:
4325         return rc;
4326 }
4327
4328 /*
4329  * CMD_UPDATE_STADB.
4330  */
4331 struct ewc_ht_info {
4332         __le16  control1;
4333         __le16  control2;
4334         __le16  control3;
4335 } __packed;
4336
4337 struct peer_capability_info {
4338         /* Peer type - AP vs. STA.  */
4339         __u8    peer_type;
4340
4341         /* Basic 802.11 capabilities from assoc resp.  */
4342         __le16  basic_caps;
4343
4344         /* Set if peer supports 802.11n high throughput (HT).  */
4345         __u8    ht_support;
4346
4347         /* Valid if HT is supported.  */
4348         __le16  ht_caps;
4349         __u8    extended_ht_caps;
4350         struct ewc_ht_info      ewc_info;
4351
4352         /* Legacy rate table. Intersection of our rates and peer rates.  */
4353         __u8    legacy_rates[12];
4354
4355         /* HT rate table. Intersection of our rates and peer rates.  */
4356         __u8    ht_rates[16];
4357         __u8    pad[16];
4358
4359         /* If set, interoperability mode, no proprietary extensions.  */
4360         __u8    interop;
4361         __u8    pad2;
4362         __u8    station_id;
4363         __le16  amsdu_enabled;
4364 } __packed;
4365
4366 struct mwl8k_cmd_update_stadb {
4367         struct mwl8k_cmd_pkt header;
4368
4369         /* See STADB_ACTION_TYPE */
4370         __le32  action;
4371
4372         /* Peer MAC address */
4373         __u8    peer_addr[ETH_ALEN];
4374
4375         __le32  reserved;
4376
4377         /* Peer info - valid during add/update.  */
4378         struct peer_capability_info     peer_info;
4379 } __packed;
4380
4381 #define MWL8K_STA_DB_MODIFY_ENTRY       1
4382 #define MWL8K_STA_DB_DEL_ENTRY          2
4383
4384 /* Peer Entry flags - used to define the type of the peer node */
4385 #define MWL8K_PEER_TYPE_ACCESSPOINT     2
4386
4387 static int mwl8k_cmd_update_stadb_add(struct ieee80211_hw *hw,
4388                                       struct ieee80211_vif *vif,
4389                                       struct ieee80211_sta *sta)
4390 {
4391         struct mwl8k_cmd_update_stadb *cmd;
4392         struct peer_capability_info *p;
4393         u32 rates;
4394         int rc;
4395
4396         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4397         if (cmd == NULL)
4398                 return -ENOMEM;
4399
4400         cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_STADB);
4401         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4402         cmd->action = cpu_to_le32(MWL8K_STA_DB_MODIFY_ENTRY);
4403         memcpy(cmd->peer_addr, sta->addr, ETH_ALEN);
4404
4405         p = &cmd->peer_info;
4406         p->peer_type = MWL8K_PEER_TYPE_ACCESSPOINT;
4407         p->basic_caps = cpu_to_le16(vif->bss_conf.assoc_capability);
4408         p->ht_support = sta->ht_cap.ht_supported;
4409         p->ht_caps = cpu_to_le16(sta->ht_cap.cap);
4410         p->extended_ht_caps = (sta->ht_cap.ampdu_factor & 3) |
4411                 ((sta->ht_cap.ampdu_density & 7) << 2);
4412         if (hw->conf.chandef.chan->band == IEEE80211_BAND_2GHZ)
4413                 rates = sta->supp_rates[IEEE80211_BAND_2GHZ];
4414         else
4415                 rates = sta->supp_rates[IEEE80211_BAND_5GHZ] << 5;
4416         legacy_rate_mask_to_array(p->legacy_rates, rates);
4417         memcpy(p->ht_rates, sta->ht_cap.mcs.rx_mask, 16);
4418         p->interop = 1;
4419         p->amsdu_enabled = 0;
4420
4421         rc = mwl8k_post_cmd(hw, &cmd->header);
4422         if (!rc)
4423                 rc = p->station_id;
4424         kfree(cmd);
4425
4426         return rc;
4427 }
4428
4429 static int mwl8k_cmd_update_stadb_del(struct ieee80211_hw *hw,
4430                                       struct ieee80211_vif *vif, u8 *addr)
4431 {
4432         struct mwl8k_cmd_update_stadb *cmd;
4433         int rc;
4434
4435         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4436         if (cmd == NULL)
4437                 return -ENOMEM;
4438
4439         cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_STADB);
4440         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4441         cmd->action = cpu_to_le32(MWL8K_STA_DB_DEL_ENTRY);
4442         memcpy(cmd->peer_addr, addr, ETH_ALEN);
4443
4444         rc = mwl8k_post_cmd(hw, &cmd->header);
4445         kfree(cmd);
4446
4447         return rc;
4448 }
4449
4450
4451 /*
4452  * Interrupt handling.
4453  */
4454 static irqreturn_t mwl8k_interrupt(int irq, void *dev_id)
4455 {
4456         struct ieee80211_hw *hw = dev_id;
4457         struct mwl8k_priv *priv = hw->priv;
4458         u32 status;
4459
4460         status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4461         if (!status)
4462                 return IRQ_NONE;
4463
4464         if (status & MWL8K_A2H_INT_TX_DONE) {
4465                 status &= ~MWL8K_A2H_INT_TX_DONE;
4466                 tasklet_schedule(&priv->poll_tx_task);
4467         }
4468
4469         if (status & MWL8K_A2H_INT_RX_READY) {
4470                 status &= ~MWL8K_A2H_INT_RX_READY;
4471                 tasklet_schedule(&priv->poll_rx_task);
4472         }
4473
4474         if (status & MWL8K_A2H_INT_BA_WATCHDOG) {
4475                 iowrite32(~MWL8K_A2H_INT_BA_WATCHDOG,
4476                           priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
4477
4478                 atomic_inc(&priv->watchdog_event_pending);
4479                 status &= ~MWL8K_A2H_INT_BA_WATCHDOG;
4480                 ieee80211_queue_work(hw, &priv->watchdog_ba_handle);
4481         }
4482
4483         if (status)
4484                 iowrite32(~status, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4485
4486         if (status & MWL8K_A2H_INT_OPC_DONE) {
4487                 if (priv->hostcmd_wait != NULL)
4488                         complete(priv->hostcmd_wait);
4489         }
4490
4491         if (status & MWL8K_A2H_INT_QUEUE_EMPTY) {
4492                 if (!mutex_is_locked(&priv->fw_mutex) &&
4493                     priv->radio_on && priv->pending_tx_pkts)
4494                         mwl8k_tx_start(priv);
4495         }
4496
4497         return IRQ_HANDLED;
4498 }
4499
4500 static void mwl8k_tx_poll(unsigned long data)
4501 {
4502         struct ieee80211_hw *hw = (struct ieee80211_hw *)data;
4503         struct mwl8k_priv *priv = hw->priv;
4504         int limit;
4505         int i;
4506
4507         limit = 32;
4508
4509         spin_lock_bh(&priv->tx_lock);
4510
4511         for (i = 0; i < mwl8k_tx_queues(priv); i++)
4512                 limit -= mwl8k_txq_reclaim(hw, i, limit, 0);
4513
4514         if (!priv->pending_tx_pkts && priv->tx_wait != NULL) {
4515                 complete(priv->tx_wait);
4516                 priv->tx_wait = NULL;
4517         }
4518
4519         spin_unlock_bh(&priv->tx_lock);
4520
4521         if (limit) {
4522                 writel(~MWL8K_A2H_INT_TX_DONE,
4523                        priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4524         } else {
4525                 tasklet_schedule(&priv->poll_tx_task);
4526         }
4527 }
4528
4529 static void mwl8k_rx_poll(unsigned long data)
4530 {
4531         struct ieee80211_hw *hw = (struct ieee80211_hw *)data;
4532         struct mwl8k_priv *priv = hw->priv;
4533         int limit;
4534
4535         limit = 32;
4536         limit -= rxq_process(hw, 0, limit);
4537         limit -= rxq_refill(hw, 0, limit);
4538
4539         if (limit) {
4540                 writel(~MWL8K_A2H_INT_RX_READY,
4541                        priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4542         } else {
4543                 tasklet_schedule(&priv->poll_rx_task);
4544         }
4545 }
4546
4547
4548 /*
4549  * Core driver operations.
4550  */
4551 static void mwl8k_tx(struct ieee80211_hw *hw,
4552                      struct ieee80211_tx_control *control,
4553                      struct sk_buff *skb)
4554 {
4555         struct mwl8k_priv *priv = hw->priv;
4556         int index = skb_get_queue_mapping(skb);
4557
4558         if (!priv->radio_on) {
4559                 wiphy_debug(hw->wiphy,
4560                             "dropped TX frame since radio disabled\n");
4561                 dev_kfree_skb(skb);
4562                 return;
4563         }
4564
4565         mwl8k_txq_xmit(hw, index, control->sta, skb);
4566 }
4567
4568 static int mwl8k_start(struct ieee80211_hw *hw)
4569 {
4570         struct mwl8k_priv *priv = hw->priv;
4571         int rc;
4572
4573         rc = request_irq(priv->pdev->irq, mwl8k_interrupt,
4574                          IRQF_SHARED, MWL8K_NAME, hw);
4575         if (rc) {
4576                 priv->irq = -1;
4577                 wiphy_err(hw->wiphy, "failed to register IRQ handler\n");
4578                 return -EIO;
4579         }
4580         priv->irq = priv->pdev->irq;
4581
4582         /* Enable TX reclaim and RX tasklets.  */
4583         tasklet_enable(&priv->poll_tx_task);
4584         tasklet_enable(&priv->poll_rx_task);
4585
4586         /* Enable interrupts */
4587         iowrite32(MWL8K_A2H_EVENTS, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4588         iowrite32(MWL8K_A2H_EVENTS,
4589                   priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
4590
4591         rc = mwl8k_fw_lock(hw);
4592         if (!rc) {
4593                 rc = mwl8k_cmd_radio_enable(hw);
4594
4595                 if (!priv->ap_fw) {
4596                         if (!rc)
4597                                 rc = mwl8k_cmd_enable_sniffer(hw, 0);
4598
4599                         if (!rc)
4600                                 rc = mwl8k_cmd_set_pre_scan(hw);
4601
4602                         if (!rc)
4603                                 rc = mwl8k_cmd_set_post_scan(hw,
4604                                                 "\x00\x00\x00\x00\x00\x00");
4605                 }
4606
4607                 if (!rc)
4608                         rc = mwl8k_cmd_set_rateadapt_mode(hw, 0);
4609
4610                 if (!rc)
4611                         rc = mwl8k_cmd_set_wmm_mode(hw, 0);
4612
4613                 mwl8k_fw_unlock(hw);
4614         }
4615
4616         if (rc) {
4617                 iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4618                 free_irq(priv->pdev->irq, hw);
4619                 priv->irq = -1;
4620                 tasklet_disable(&priv->poll_tx_task);
4621                 tasklet_disable(&priv->poll_rx_task);
4622         } else {
4623                 ieee80211_wake_queues(hw);
4624         }
4625
4626         return rc;
4627 }
4628
4629 static void mwl8k_stop(struct ieee80211_hw *hw)
4630 {
4631         struct mwl8k_priv *priv = hw->priv;
4632         int i;
4633
4634         if (!priv->hw_restart_in_progress)
4635                 mwl8k_cmd_radio_disable(hw);
4636
4637         ieee80211_stop_queues(hw);
4638
4639         /* Disable interrupts */
4640         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4641         if (priv->irq != -1) {
4642                 free_irq(priv->pdev->irq, hw);
4643                 priv->irq = -1;
4644         }
4645
4646         /* Stop finalize join worker */
4647         cancel_work_sync(&priv->finalize_join_worker);
4648         cancel_work_sync(&priv->watchdog_ba_handle);
4649         if (priv->beacon_skb != NULL)
4650                 dev_kfree_skb(priv->beacon_skb);
4651
4652         /* Stop TX reclaim and RX tasklets.  */
4653         tasklet_disable(&priv->poll_tx_task);
4654         tasklet_disable(&priv->poll_rx_task);
4655
4656         /* Return all skbs to mac80211 */
4657         for (i = 0; i < mwl8k_tx_queues(priv); i++)
4658                 mwl8k_txq_reclaim(hw, i, INT_MAX, 1);
4659 }
4660
4661 static int mwl8k_reload_firmware(struct ieee80211_hw *hw, char *fw_image);
4662
4663 static int mwl8k_add_interface(struct ieee80211_hw *hw,
4664                                struct ieee80211_vif *vif)
4665 {
4666         struct mwl8k_priv *priv = hw->priv;
4667         struct mwl8k_vif *mwl8k_vif;
4668         u32 macids_supported;
4669         int macid, rc;
4670         struct mwl8k_device_info *di;
4671
4672         /*
4673          * Reject interface creation if sniffer mode is active, as
4674          * STA operation is mutually exclusive with hardware sniffer
4675          * mode.  (Sniffer mode is only used on STA firmware.)
4676          */
4677         if (priv->sniffer_enabled) {
4678                 wiphy_info(hw->wiphy,
4679                            "unable to create STA interface because sniffer mode is enabled\n");
4680                 return -EINVAL;
4681         }
4682
4683         di = priv->device_info;
4684         switch (vif->type) {
4685         case NL80211_IFTYPE_AP:
4686                 if (!priv->ap_fw && di->fw_image_ap) {
4687                         /* we must load the ap fw to meet this request */
4688                         if (!list_empty(&priv->vif_list))
4689                                 return -EBUSY;
4690                         rc = mwl8k_reload_firmware(hw, di->fw_image_ap);
4691                         if (rc)
4692                                 return rc;
4693                 }
4694                 macids_supported = priv->ap_macids_supported;
4695                 break;
4696         case NL80211_IFTYPE_STATION:
4697                 if (priv->ap_fw && di->fw_image_sta) {
4698                         if (!list_empty(&priv->vif_list)) {
4699                                 wiphy_warn(hw->wiphy, "AP interface is running.\n"
4700                                            "Adding STA interface for WDS");
4701                         } else {
4702                                 /* we must load the sta fw to
4703                                  * meet this request.
4704                                  */
4705                                 rc = mwl8k_reload_firmware(hw,
4706                                                            di->fw_image_sta);
4707                                 if (rc)
4708                                         return rc;
4709                         }
4710                 }
4711                 macids_supported = priv->sta_macids_supported;
4712                 break;
4713         default:
4714                 return -EINVAL;
4715         }
4716
4717         macid = ffs(macids_supported & ~priv->macids_used);
4718         if (!macid--)
4719                 return -EBUSY;
4720
4721         /* Setup driver private area. */
4722         mwl8k_vif = MWL8K_VIF(vif);
4723         memset(mwl8k_vif, 0, sizeof(*mwl8k_vif));
4724         mwl8k_vif->vif = vif;
4725         mwl8k_vif->macid = macid;
4726         mwl8k_vif->seqno = 0;
4727         memcpy(mwl8k_vif->bssid, vif->addr, ETH_ALEN);
4728         mwl8k_vif->is_hw_crypto_enabled = false;
4729
4730         /* Set the mac address.  */
4731         mwl8k_cmd_set_mac_addr(hw, vif, vif->addr);
4732
4733         if (vif->type == NL80211_IFTYPE_AP)
4734                 mwl8k_cmd_set_new_stn_add_self(hw, vif);
4735
4736         priv->macids_used |= 1 << mwl8k_vif->macid;
4737         list_add_tail(&mwl8k_vif->list, &priv->vif_list);
4738
4739         return 0;
4740 }
4741
4742 static void mwl8k_remove_vif(struct mwl8k_priv *priv, struct mwl8k_vif *vif)
4743 {
4744         /* Has ieee80211_restart_hw re-added the removed interfaces? */
4745         if (!priv->macids_used)
4746                 return;
4747
4748         priv->macids_used &= ~(1 << vif->macid);
4749         list_del(&vif->list);
4750 }
4751
4752 static void mwl8k_remove_interface(struct ieee80211_hw *hw,
4753                                    struct ieee80211_vif *vif)
4754 {
4755         struct mwl8k_priv *priv = hw->priv;
4756         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4757
4758         if (vif->type == NL80211_IFTYPE_AP)
4759                 mwl8k_cmd_set_new_stn_del(hw, vif, vif->addr);
4760
4761         mwl8k_cmd_del_mac_addr(hw, vif, vif->addr);
4762
4763         mwl8k_remove_vif(priv, mwl8k_vif);
4764 }
4765
4766 static void mwl8k_hw_restart_work(struct work_struct *work)
4767 {
4768         struct mwl8k_priv *priv =
4769                 container_of(work, struct mwl8k_priv, fw_reload);
4770         struct ieee80211_hw *hw = priv->hw;
4771         struct mwl8k_device_info *di;
4772         int rc;
4773
4774         /* If some command is waiting for a response, clear it */
4775         if (priv->hostcmd_wait != NULL) {
4776                 complete(priv->hostcmd_wait);
4777                 priv->hostcmd_wait = NULL;
4778         }
4779
4780         priv->hw_restart_owner = current;
4781         di = priv->device_info;
4782         mwl8k_fw_lock(hw);
4783
4784         if (priv->ap_fw)
4785                 rc = mwl8k_reload_firmware(hw, di->fw_image_ap);
4786         else
4787                 rc = mwl8k_reload_firmware(hw, di->fw_image_sta);
4788
4789         if (rc)
4790                 goto fail;
4791
4792         priv->hw_restart_owner = NULL;
4793         priv->hw_restart_in_progress = false;
4794
4795         /*
4796          * This unlock will wake up the queues and
4797          * also opens the command path for other
4798          * commands
4799          */
4800         mwl8k_fw_unlock(hw);
4801
4802         ieee80211_restart_hw(hw);
4803
4804         wiphy_err(hw->wiphy, "Firmware restarted successfully\n");
4805
4806         return;
4807 fail:
4808         mwl8k_fw_unlock(hw);
4809
4810         wiphy_err(hw->wiphy, "Firmware restart failed\n");
4811 }
4812
4813 static int mwl8k_config(struct ieee80211_hw *hw, u32 changed)
4814 {
4815         struct ieee80211_conf *conf = &hw->conf;
4816         struct mwl8k_priv *priv = hw->priv;
4817         int rc;
4818
4819         rc = mwl8k_fw_lock(hw);
4820         if (rc)
4821                 return rc;
4822
4823         if (conf->flags & IEEE80211_CONF_IDLE)
4824                 rc = mwl8k_cmd_radio_disable(hw);
4825         else
4826                 rc = mwl8k_cmd_radio_enable(hw);
4827         if (rc)
4828                 goto out;
4829
4830         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
4831                 rc = mwl8k_cmd_set_rf_channel(hw, conf);
4832                 if (rc)
4833                         goto out;
4834         }
4835
4836         if (conf->power_level > 18)
4837                 conf->power_level = 18;
4838
4839         if (priv->ap_fw) {
4840
4841                 if (conf->flags & IEEE80211_CONF_CHANGE_POWER) {
4842                         rc = mwl8k_cmd_tx_power(hw, conf, conf->power_level);
4843                         if (rc)
4844                                 goto out;
4845                 }
4846
4847
4848         } else {
4849                 rc = mwl8k_cmd_rf_tx_power(hw, conf->power_level);
4850                 if (rc)
4851                         goto out;
4852                 rc = mwl8k_cmd_mimo_config(hw, 0x7, 0x7);
4853         }
4854
4855 out:
4856         mwl8k_fw_unlock(hw);
4857
4858         return rc;
4859 }
4860
4861 static void
4862 mwl8k_bss_info_changed_sta(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4863                            struct ieee80211_bss_conf *info, u32 changed)
4864 {
4865         struct mwl8k_priv *priv = hw->priv;
4866         u32 ap_legacy_rates = 0;
4867         u8 ap_mcs_rates[16];
4868         int rc;
4869
4870         if (mwl8k_fw_lock(hw))
4871                 return;
4872
4873         /*
4874          * No need to capture a beacon if we're no longer associated.
4875          */
4876         if ((changed & BSS_CHANGED_ASSOC) && !vif->bss_conf.assoc)
4877                 priv->capture_beacon = false;
4878
4879         /*
4880          * Get the AP's legacy and MCS rates.
4881          */
4882         if (vif->bss_conf.assoc) {
4883                 struct ieee80211_sta *ap;
4884
4885                 rcu_read_lock();
4886
4887                 ap = ieee80211_find_sta(vif, vif->bss_conf.bssid);
4888                 if (ap == NULL) {
4889                         rcu_read_unlock();
4890                         goto out;
4891                 }
4892
4893                 if (hw->conf.chandef.chan->band == IEEE80211_BAND_2GHZ) {
4894                         ap_legacy_rates = ap->supp_rates[IEEE80211_BAND_2GHZ];
4895                 } else {
4896                         ap_legacy_rates =
4897                                 ap->supp_rates[IEEE80211_BAND_5GHZ] << 5;
4898                 }
4899                 memcpy(ap_mcs_rates, ap->ht_cap.mcs.rx_mask, 16);
4900
4901                 rcu_read_unlock();
4902         }
4903
4904         if ((changed & BSS_CHANGED_ASSOC) && vif->bss_conf.assoc &&
4905             !priv->ap_fw) {
4906                 rc = mwl8k_cmd_set_rate(hw, vif, ap_legacy_rates, ap_mcs_rates);
4907                 if (rc)
4908                         goto out;
4909
4910                 rc = mwl8k_cmd_use_fixed_rate_sta(hw);
4911                 if (rc)
4912                         goto out;
4913         } else {
4914                 if ((changed & BSS_CHANGED_ASSOC) && vif->bss_conf.assoc &&
4915                     priv->ap_fw) {
4916                         int idx;
4917                         int rate;
4918
4919                         /* Use AP firmware specific rate command.
4920                          */
4921                         idx = ffs(vif->bss_conf.basic_rates);
4922                         if (idx)
4923                                 idx--;
4924
4925                         if (hw->conf.chandef.chan->band == IEEE80211_BAND_2GHZ)
4926                                 rate = mwl8k_rates_24[idx].hw_value;
4927                         else
4928                                 rate = mwl8k_rates_50[idx].hw_value;
4929
4930                         mwl8k_cmd_use_fixed_rate_ap(hw, rate, rate);
4931                 }
4932         }
4933
4934         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
4935                 rc = mwl8k_set_radio_preamble(hw,
4936                                 vif->bss_conf.use_short_preamble);
4937                 if (rc)
4938                         goto out;
4939         }
4940
4941         if ((changed & BSS_CHANGED_ERP_SLOT) && !priv->ap_fw)  {
4942                 rc = mwl8k_cmd_set_slot(hw, vif->bss_conf.use_short_slot);
4943                 if (rc)
4944                         goto out;
4945         }
4946
4947         if (vif->bss_conf.assoc && !priv->ap_fw &&
4948             (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_ERP_CTS_PROT |
4949                         BSS_CHANGED_HT))) {
4950                 rc = mwl8k_cmd_set_aid(hw, vif, ap_legacy_rates);
4951                 if (rc)
4952                         goto out;
4953         }
4954
4955         if (vif->bss_conf.assoc &&
4956             (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_BEACON_INT))) {
4957                 /*
4958                  * Finalize the join.  Tell rx handler to process
4959                  * next beacon from our BSSID.
4960                  */
4961                 memcpy(priv->capture_bssid, vif->bss_conf.bssid, ETH_ALEN);
4962                 priv->capture_beacon = true;
4963         }
4964
4965 out:
4966         mwl8k_fw_unlock(hw);
4967 }
4968
4969 static void
4970 mwl8k_bss_info_changed_ap(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4971                           struct ieee80211_bss_conf *info, u32 changed)
4972 {
4973         int rc;
4974
4975         if (mwl8k_fw_lock(hw))
4976                 return;
4977
4978         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
4979                 rc = mwl8k_set_radio_preamble(hw,
4980                                 vif->bss_conf.use_short_preamble);
4981                 if (rc)
4982                         goto out;
4983         }
4984
4985         if (changed & BSS_CHANGED_BASIC_RATES) {
4986                 int idx;
4987                 int rate;
4988
4989                 /*
4990                  * Use lowest supported basic rate for multicasts
4991                  * and management frames (such as probe responses --
4992                  * beacons will always go out at 1 Mb/s).
4993                  */
4994                 idx = ffs(vif->bss_conf.basic_rates);
4995                 if (idx)
4996                         idx--;
4997
4998                 if (hw->conf.chandef.chan->band == IEEE80211_BAND_2GHZ)
4999                         rate = mwl8k_rates_24[idx].hw_value;
5000                 else
5001                         rate = mwl8k_rates_50[idx].hw_value;
5002
5003                 mwl8k_cmd_use_fixed_rate_ap(hw, rate, rate);
5004         }
5005
5006         if (changed & (BSS_CHANGED_BEACON_INT | BSS_CHANGED_BEACON)) {
5007                 struct sk_buff *skb;
5008
5009                 skb = ieee80211_beacon_get(hw, vif);
5010                 if (skb != NULL) {
5011                         mwl8k_cmd_set_beacon(hw, vif, skb->data, skb->len);
5012                         kfree_skb(skb);
5013                 }
5014         }
5015
5016         if (changed & BSS_CHANGED_BEACON_ENABLED)
5017                 mwl8k_cmd_bss_start(hw, vif, info->enable_beacon);
5018
5019 out:
5020         mwl8k_fw_unlock(hw);
5021 }
5022
5023 static void
5024 mwl8k_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5025                        struct ieee80211_bss_conf *info, u32 changed)
5026 {
5027         if (vif->type == NL80211_IFTYPE_STATION)
5028                 mwl8k_bss_info_changed_sta(hw, vif, info, changed);
5029         if (vif->type == NL80211_IFTYPE_AP)
5030                 mwl8k_bss_info_changed_ap(hw, vif, info, changed);
5031 }
5032
5033 static u64 mwl8k_prepare_multicast(struct ieee80211_hw *hw,
5034                                    struct netdev_hw_addr_list *mc_list)
5035 {
5036         struct mwl8k_cmd_pkt *cmd;
5037
5038         /*
5039          * Synthesize and return a command packet that programs the
5040          * hardware multicast address filter.  At this point we don't
5041          * know whether FIF_ALLMULTI is being requested, but if it is,
5042          * we'll end up throwing this packet away and creating a new
5043          * one in mwl8k_configure_filter().
5044          */
5045         cmd = __mwl8k_cmd_mac_multicast_adr(hw, 0, mc_list);
5046
5047         return (unsigned long)cmd;
5048 }
5049
5050 static int
5051 mwl8k_configure_filter_sniffer(struct ieee80211_hw *hw,
5052                                unsigned int changed_flags,
5053                                unsigned int *total_flags)
5054 {
5055         struct mwl8k_priv *priv = hw->priv;
5056
5057         /*
5058          * Hardware sniffer mode is mutually exclusive with STA
5059          * operation, so refuse to enable sniffer mode if a STA
5060          * interface is active.
5061          */
5062         if (!list_empty(&priv->vif_list)) {
5063                 if (net_ratelimit())
5064                         wiphy_info(hw->wiphy,
5065                                    "not enabling sniffer mode because STA interface is active\n");
5066                 return 0;
5067         }
5068
5069         if (!priv->sniffer_enabled) {
5070                 if (mwl8k_cmd_enable_sniffer(hw, 1))
5071                         return 0;
5072                 priv->sniffer_enabled = true;
5073         }
5074
5075         *total_flags &= FIF_PROMISC_IN_BSS | FIF_ALLMULTI |
5076                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL |
5077                         FIF_OTHER_BSS;
5078
5079         return 1;
5080 }
5081
5082 static struct mwl8k_vif *mwl8k_first_vif(struct mwl8k_priv *priv)
5083 {
5084         if (!list_empty(&priv->vif_list))
5085                 return list_entry(priv->vif_list.next, struct mwl8k_vif, list);
5086
5087         return NULL;
5088 }
5089
5090 static void mwl8k_configure_filter(struct ieee80211_hw *hw,
5091                                    unsigned int changed_flags,
5092                                    unsigned int *total_flags,
5093                                    u64 multicast)
5094 {
5095         struct mwl8k_priv *priv = hw->priv;
5096         struct mwl8k_cmd_pkt *cmd = (void *)(unsigned long)multicast;
5097
5098         /*
5099          * AP firmware doesn't allow fine-grained control over
5100          * the receive filter.
5101          */
5102         if (priv->ap_fw) {
5103                 *total_flags &= FIF_ALLMULTI | FIF_BCN_PRBRESP_PROMISC;
5104                 kfree(cmd);
5105                 return;
5106         }
5107
5108         /*
5109          * Enable hardware sniffer mode if FIF_CONTROL or
5110          * FIF_OTHER_BSS is requested.
5111          */
5112         if (*total_flags & (FIF_CONTROL | FIF_OTHER_BSS) &&
5113             mwl8k_configure_filter_sniffer(hw, changed_flags, total_flags)) {
5114                 kfree(cmd);
5115                 return;
5116         }
5117
5118         /* Clear unsupported feature flags */
5119         *total_flags &= FIF_ALLMULTI | FIF_BCN_PRBRESP_PROMISC;
5120
5121         if (mwl8k_fw_lock(hw)) {
5122                 kfree(cmd);
5123                 return;
5124         }
5125
5126         if (priv->sniffer_enabled) {
5127                 mwl8k_cmd_enable_sniffer(hw, 0);
5128                 priv->sniffer_enabled = false;
5129         }
5130
5131         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
5132                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC) {
5133                         /*
5134                          * Disable the BSS filter.
5135                          */
5136                         mwl8k_cmd_set_pre_scan(hw);
5137                 } else {
5138                         struct mwl8k_vif *mwl8k_vif;
5139                         const u8 *bssid;
5140
5141                         /*
5142                          * Enable the BSS filter.
5143                          *
5144                          * If there is an active STA interface, use that
5145                          * interface's BSSID, otherwise use a dummy one
5146                          * (where the OUI part needs to be nonzero for
5147                          * the BSSID to be accepted by POST_SCAN).
5148                          */
5149                         mwl8k_vif = mwl8k_first_vif(priv);
5150                         if (mwl8k_vif != NULL)
5151                                 bssid = mwl8k_vif->vif->bss_conf.bssid;
5152                         else
5153                                 bssid = "\x01\x00\x00\x00\x00\x00";
5154
5155                         mwl8k_cmd_set_post_scan(hw, bssid);
5156                 }
5157         }
5158
5159         /*
5160          * If FIF_ALLMULTI is being requested, throw away the command
5161          * packet that ->prepare_multicast() built and replace it with
5162          * a command packet that enables reception of all multicast
5163          * packets.
5164          */
5165         if (*total_flags & FIF_ALLMULTI) {
5166                 kfree(cmd);
5167                 cmd = __mwl8k_cmd_mac_multicast_adr(hw, 1, NULL);
5168         }
5169
5170         if (cmd != NULL) {
5171                 mwl8k_post_cmd(hw, cmd);
5172                 kfree(cmd);
5173         }
5174
5175         mwl8k_fw_unlock(hw);
5176 }
5177
5178 static int mwl8k_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
5179 {
5180         return mwl8k_cmd_set_rts_threshold(hw, value);
5181 }
5182
5183 static int mwl8k_sta_remove(struct ieee80211_hw *hw,
5184                             struct ieee80211_vif *vif,
5185                             struct ieee80211_sta *sta)
5186 {
5187         struct mwl8k_priv *priv = hw->priv;
5188
5189         if (priv->ap_fw)
5190                 return mwl8k_cmd_set_new_stn_del(hw, vif, sta->addr);
5191         else
5192                 return mwl8k_cmd_update_stadb_del(hw, vif, sta->addr);
5193 }
5194
5195 static int mwl8k_sta_add(struct ieee80211_hw *hw,
5196                          struct ieee80211_vif *vif,
5197                          struct ieee80211_sta *sta)
5198 {
5199         struct mwl8k_priv *priv = hw->priv;
5200         int ret;
5201         int i;
5202         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
5203         struct ieee80211_key_conf *key;
5204
5205         if (!priv->ap_fw) {
5206                 ret = mwl8k_cmd_update_stadb_add(hw, vif, sta);
5207                 if (ret >= 0) {
5208                         MWL8K_STA(sta)->peer_id = ret;
5209                         if (sta->ht_cap.ht_supported)
5210                                 MWL8K_STA(sta)->is_ampdu_allowed = true;
5211                         ret = 0;
5212                 }
5213
5214         } else {
5215                 ret = mwl8k_cmd_set_new_stn_add(hw, vif, sta);
5216         }
5217
5218         for (i = 0; i < NUM_WEP_KEYS; i++) {
5219                 key = IEEE80211_KEY_CONF(mwl8k_vif->wep_key_conf[i].key);
5220                 if (mwl8k_vif->wep_key_conf[i].enabled)
5221                         mwl8k_set_key(hw, SET_KEY, vif, sta, key);
5222         }
5223         return ret;
5224 }
5225
5226 static int mwl8k_conf_tx(struct ieee80211_hw *hw,
5227                          struct ieee80211_vif *vif, u16 queue,
5228                          const struct ieee80211_tx_queue_params *params)
5229 {
5230         struct mwl8k_priv *priv = hw->priv;
5231         int rc;
5232
5233         rc = mwl8k_fw_lock(hw);
5234         if (!rc) {
5235                 BUG_ON(queue > MWL8K_TX_WMM_QUEUES - 1);
5236                 memcpy(&priv->wmm_params[queue], params, sizeof(*params));
5237
5238                 if (!priv->wmm_enabled)
5239                         rc = mwl8k_cmd_set_wmm_mode(hw, 1);
5240
5241                 if (!rc) {
5242                         int q = MWL8K_TX_WMM_QUEUES - 1 - queue;
5243                         rc = mwl8k_cmd_set_edca_params(hw, q,
5244                                                        params->cw_min,
5245                                                        params->cw_max,
5246                                                        params->aifs,
5247                                                        params->txop);
5248                 }
5249
5250                 mwl8k_fw_unlock(hw);
5251         }
5252
5253         return rc;
5254 }
5255
5256 static int mwl8k_get_stats(struct ieee80211_hw *hw,
5257                            struct ieee80211_low_level_stats *stats)
5258 {
5259         return mwl8k_cmd_get_stat(hw, stats);
5260 }
5261
5262 static int mwl8k_get_survey(struct ieee80211_hw *hw, int idx,
5263                                 struct survey_info *survey)
5264 {
5265         struct mwl8k_priv *priv = hw->priv;
5266         struct ieee80211_conf *conf = &hw->conf;
5267
5268         if (idx != 0)
5269                 return -ENOENT;
5270
5271         survey->channel = conf->chandef.chan;
5272         survey->filled = SURVEY_INFO_NOISE_DBM;
5273         survey->noise = priv->noise;
5274
5275         return 0;
5276 }
5277
5278 #define MAX_AMPDU_ATTEMPTS 5
5279
5280 static int
5281 mwl8k_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5282                    enum ieee80211_ampdu_mlme_action action,
5283                    struct ieee80211_sta *sta, u16 tid, u16 *ssn,
5284                    u8 buf_size)
5285 {
5286
5287         int i, rc = 0;
5288         struct mwl8k_priv *priv = hw->priv;
5289         struct mwl8k_ampdu_stream *stream;
5290         u8 *addr = sta->addr, idx;
5291         struct mwl8k_sta *sta_info = MWL8K_STA(sta);
5292
5293         if (!(hw->flags & IEEE80211_HW_AMPDU_AGGREGATION))
5294                 return -ENOTSUPP;
5295
5296         spin_lock(&priv->stream_lock);
5297         stream = mwl8k_lookup_stream(hw, addr, tid);
5298
5299         switch (action) {
5300         case IEEE80211_AMPDU_RX_START:
5301         case IEEE80211_AMPDU_RX_STOP:
5302                 break;
5303         case IEEE80211_AMPDU_TX_START:
5304                 /* By the time we get here the hw queues may contain outgoing
5305                  * packets for this RA/TID that are not part of this BA
5306                  * session.  The hw will assign sequence numbers to these
5307                  * packets as they go out.  So if we query the hw for its next
5308                  * sequence number and use that for the SSN here, it may end up
5309                  * being wrong, which will lead to sequence number mismatch at
5310                  * the recipient.  To avoid this, we reset the sequence number
5311                  * to O for the first MPDU in this BA stream.
5312                  */
5313                 *ssn = 0;
5314                 if (stream == NULL) {
5315                         /* This means that somebody outside this driver called
5316                          * ieee80211_start_tx_ba_session.  This is unexpected
5317                          * because we do our own rate control.  Just warn and
5318                          * move on.
5319                          */
5320                         wiphy_warn(hw->wiphy, "Unexpected call to %s.  "
5321                                    "Proceeding anyway.\n", __func__);
5322                         stream = mwl8k_add_stream(hw, sta, tid);
5323                 }
5324                 if (stream == NULL) {
5325                         wiphy_debug(hw->wiphy, "no free AMPDU streams\n");
5326                         rc = -EBUSY;
5327                         break;
5328                 }
5329                 stream->state = AMPDU_STREAM_IN_PROGRESS;
5330
5331                 /* Release the lock before we do the time consuming stuff */
5332                 spin_unlock(&priv->stream_lock);
5333                 for (i = 0; i < MAX_AMPDU_ATTEMPTS; i++) {
5334
5335                         /* Check if link is still valid */
5336                         if (!sta_info->is_ampdu_allowed) {
5337                                 spin_lock(&priv->stream_lock);
5338                                 mwl8k_remove_stream(hw, stream);
5339                                 spin_unlock(&priv->stream_lock);
5340                                 return -EBUSY;
5341                         }
5342
5343                         rc = mwl8k_check_ba(hw, stream, vif);
5344
5345                         /* If HW restart is in progress mwl8k_post_cmd will
5346                          * return -EBUSY. Avoid retrying mwl8k_check_ba in
5347                          * such cases
5348                          */
5349                         if (!rc || rc == -EBUSY)
5350                                 break;
5351                         /*
5352                          * HW queues take time to be flushed, give them
5353                          * sufficient time
5354                          */
5355
5356                         msleep(1000);
5357                 }
5358                 spin_lock(&priv->stream_lock);
5359                 if (rc) {
5360                         wiphy_err(hw->wiphy, "Stream for tid %d busy after %d"
5361                                 " attempts\n", tid, MAX_AMPDU_ATTEMPTS);
5362                         mwl8k_remove_stream(hw, stream);
5363                         rc = -EBUSY;
5364                         break;
5365                 }
5366                 ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid);
5367                 break;
5368         case IEEE80211_AMPDU_TX_STOP_CONT:
5369         case IEEE80211_AMPDU_TX_STOP_FLUSH:
5370         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
5371                 if (stream) {
5372                         if (stream->state == AMPDU_STREAM_ACTIVE) {
5373                                 idx = stream->idx;
5374                                 spin_unlock(&priv->stream_lock);
5375                                 mwl8k_destroy_ba(hw, idx);
5376                                 spin_lock(&priv->stream_lock);
5377                         }
5378                         mwl8k_remove_stream(hw, stream);
5379                 }
5380                 ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
5381                 break;
5382         case IEEE80211_AMPDU_TX_OPERATIONAL:
5383                 BUG_ON(stream == NULL);
5384                 BUG_ON(stream->state != AMPDU_STREAM_IN_PROGRESS);
5385                 spin_unlock(&priv->stream_lock);
5386                 rc = mwl8k_create_ba(hw, stream, buf_size, vif);
5387                 spin_lock(&priv->stream_lock);
5388                 if (!rc)
5389                         stream->state = AMPDU_STREAM_ACTIVE;
5390                 else {
5391                         idx = stream->idx;
5392                         spin_unlock(&priv->stream_lock);
5393                         mwl8k_destroy_ba(hw, idx);
5394                         spin_lock(&priv->stream_lock);
5395                         wiphy_debug(hw->wiphy,
5396                                 "Failed adding stream for sta %pM tid %d\n",
5397                                 addr, tid);
5398                         mwl8k_remove_stream(hw, stream);
5399                 }
5400                 break;
5401
5402         default:
5403                 rc = -ENOTSUPP;
5404         }
5405
5406         spin_unlock(&priv->stream_lock);
5407         return rc;
5408 }
5409
5410 static const struct ieee80211_ops mwl8k_ops = {
5411         .tx                     = mwl8k_tx,
5412         .start                  = mwl8k_start,
5413         .stop                   = mwl8k_stop,
5414         .add_interface          = mwl8k_add_interface,
5415         .remove_interface       = mwl8k_remove_interface,
5416         .config                 = mwl8k_config,
5417         .bss_info_changed       = mwl8k_bss_info_changed,
5418         .prepare_multicast      = mwl8k_prepare_multicast,
5419         .configure_filter       = mwl8k_configure_filter,
5420         .set_key                = mwl8k_set_key,
5421         .set_rts_threshold      = mwl8k_set_rts_threshold,
5422         .sta_add                = mwl8k_sta_add,
5423         .sta_remove             = mwl8k_sta_remove,
5424         .conf_tx                = mwl8k_conf_tx,
5425         .get_stats              = mwl8k_get_stats,
5426         .get_survey             = mwl8k_get_survey,
5427         .ampdu_action           = mwl8k_ampdu_action,
5428 };
5429
5430 static void mwl8k_finalize_join_worker(struct work_struct *work)
5431 {
5432         struct mwl8k_priv *priv =
5433                 container_of(work, struct mwl8k_priv, finalize_join_worker);
5434         struct sk_buff *skb = priv->beacon_skb;
5435         struct ieee80211_mgmt *mgmt = (void *)skb->data;
5436         int len = skb->len - offsetof(struct ieee80211_mgmt, u.beacon.variable);
5437         const u8 *tim = cfg80211_find_ie(WLAN_EID_TIM,
5438                                          mgmt->u.beacon.variable, len);
5439         int dtim_period = 1;
5440
5441         if (tim && tim[1] >= 2)
5442                 dtim_period = tim[3];
5443
5444         mwl8k_cmd_finalize_join(priv->hw, skb->data, skb->len, dtim_period);
5445
5446         dev_kfree_skb(skb);
5447         priv->beacon_skb = NULL;
5448 }
5449
5450 enum {
5451         MWL8363 = 0,
5452         MWL8687,
5453         MWL8366,
5454         MWL8764,
5455 };
5456
5457 #define MWL8K_8366_AP_FW_API 3
5458 #define _MWL8K_8366_AP_FW(api) "mwl8k/fmimage_8366_ap-" #api ".fw"
5459 #define MWL8K_8366_AP_FW(api) _MWL8K_8366_AP_FW(api)
5460
5461 #define MWL8K_8764_AP_FW_API 1
5462 #define _MWL8K_8764_AP_FW(api) "mwl8k/fmimage_8764_ap-" #api ".fw"
5463 #define MWL8K_8764_AP_FW(api) _MWL8K_8764_AP_FW(api)
5464
5465 static struct mwl8k_device_info mwl8k_info_tbl[] = {
5466         [MWL8363] = {
5467                 .part_name      = "88w8363",
5468                 .helper_image   = "mwl8k/helper_8363.fw",
5469                 .fw_image_sta   = "mwl8k/fmimage_8363.fw",
5470         },
5471         [MWL8687] = {
5472                 .part_name      = "88w8687",
5473                 .helper_image   = "mwl8k/helper_8687.fw",
5474                 .fw_image_sta   = "mwl8k/fmimage_8687.fw",
5475         },
5476         [MWL8366] = {
5477                 .part_name      = "88w8366",
5478                 .helper_image   = "mwl8k/helper_8366.fw",
5479                 .fw_image_sta   = "mwl8k/fmimage_8366.fw",
5480                 .fw_image_ap    = MWL8K_8366_AP_FW(MWL8K_8366_AP_FW_API),
5481                 .fw_api_ap      = MWL8K_8366_AP_FW_API,
5482                 .ap_rxd_ops     = &rxd_ap_ops,
5483         },
5484         [MWL8764] = {
5485                 .part_name      = "88w8764",
5486                 .fw_image_ap    = MWL8K_8764_AP_FW(MWL8K_8764_AP_FW_API),
5487                 .fw_api_ap      = MWL8K_8764_AP_FW_API,
5488                 .ap_rxd_ops     = &rxd_ap_ops,
5489         },
5490 };
5491
5492 MODULE_FIRMWARE("mwl8k/helper_8363.fw");
5493 MODULE_FIRMWARE("mwl8k/fmimage_8363.fw");
5494 MODULE_FIRMWARE("mwl8k/helper_8687.fw");
5495 MODULE_FIRMWARE("mwl8k/fmimage_8687.fw");
5496 MODULE_FIRMWARE("mwl8k/helper_8366.fw");
5497 MODULE_FIRMWARE("mwl8k/fmimage_8366.fw");
5498 MODULE_FIRMWARE(MWL8K_8366_AP_FW(MWL8K_8366_AP_FW_API));
5499
5500 static DEFINE_PCI_DEVICE_TABLE(mwl8k_pci_id_table) = {
5501         { PCI_VDEVICE(MARVELL, 0x2a0a), .driver_data = MWL8363, },
5502         { PCI_VDEVICE(MARVELL, 0x2a0c), .driver_data = MWL8363, },
5503         { PCI_VDEVICE(MARVELL, 0x2a24), .driver_data = MWL8363, },
5504         { PCI_VDEVICE(MARVELL, 0x2a2b), .driver_data = MWL8687, },
5505         { PCI_VDEVICE(MARVELL, 0x2a30), .driver_data = MWL8687, },
5506         { PCI_VDEVICE(MARVELL, 0x2a40), .driver_data = MWL8366, },
5507         { PCI_VDEVICE(MARVELL, 0x2a41), .driver_data = MWL8366, },
5508         { PCI_VDEVICE(MARVELL, 0x2a42), .driver_data = MWL8366, },
5509         { PCI_VDEVICE(MARVELL, 0x2a43), .driver_data = MWL8366, },
5510         { PCI_VDEVICE(MARVELL, 0x2b36), .driver_data = MWL8764, },
5511         { },
5512 };
5513 MODULE_DEVICE_TABLE(pci, mwl8k_pci_id_table);
5514
5515 static int mwl8k_request_alt_fw(struct mwl8k_priv *priv)
5516 {
5517         int rc;
5518         printk(KERN_ERR "%s: Error requesting preferred fw %s.\n"
5519                "Trying alternative firmware %s\n", pci_name(priv->pdev),
5520                priv->fw_pref, priv->fw_alt);
5521         rc = mwl8k_request_fw(priv, priv->fw_alt, &priv->fw_ucode, true);
5522         if (rc) {
5523                 printk(KERN_ERR "%s: Error requesting alt fw %s\n",
5524                        pci_name(priv->pdev), priv->fw_alt);
5525                 return rc;
5526         }
5527         return 0;
5528 }
5529
5530 static int mwl8k_firmware_load_success(struct mwl8k_priv *priv);
5531 static void mwl8k_fw_state_machine(const struct firmware *fw, void *context)
5532 {
5533         struct mwl8k_priv *priv = context;
5534         struct mwl8k_device_info *di = priv->device_info;
5535         int rc;
5536
5537         switch (priv->fw_state) {
5538         case FW_STATE_INIT:
5539                 if (!fw) {
5540                         printk(KERN_ERR "%s: Error requesting helper fw %s\n",
5541                                pci_name(priv->pdev), di->helper_image);
5542                         goto fail;
5543                 }
5544                 priv->fw_helper = fw;
5545                 rc = mwl8k_request_fw(priv, priv->fw_pref, &priv->fw_ucode,
5546                                       true);
5547                 if (rc && priv->fw_alt) {
5548                         rc = mwl8k_request_alt_fw(priv);
5549                         if (rc)
5550                                 goto fail;
5551                         priv->fw_state = FW_STATE_LOADING_ALT;
5552                 } else if (rc)
5553                         goto fail;
5554                 else
5555                         priv->fw_state = FW_STATE_LOADING_PREF;
5556                 break;
5557
5558         case FW_STATE_LOADING_PREF:
5559                 if (!fw) {
5560                         if (priv->fw_alt) {
5561                                 rc = mwl8k_request_alt_fw(priv);
5562                                 if (rc)
5563                                         goto fail;
5564                                 priv->fw_state = FW_STATE_LOADING_ALT;
5565                         } else
5566                                 goto fail;
5567                 } else {
5568                         priv->fw_ucode = fw;
5569                         rc = mwl8k_firmware_load_success(priv);
5570                         if (rc)
5571                                 goto fail;
5572                         else
5573                                 complete(&priv->firmware_loading_complete);
5574                 }
5575                 break;
5576
5577         case FW_STATE_LOADING_ALT:
5578                 if (!fw) {
5579                         printk(KERN_ERR "%s: Error requesting alt fw %s\n",
5580                                pci_name(priv->pdev), di->helper_image);
5581                         goto fail;
5582                 }
5583                 priv->fw_ucode = fw;
5584                 rc = mwl8k_firmware_load_success(priv);
5585                 if (rc)
5586                         goto fail;
5587                 else
5588                         complete(&priv->firmware_loading_complete);
5589                 break;
5590
5591         default:
5592                 printk(KERN_ERR "%s: Unexpected firmware loading state: %d\n",
5593                        MWL8K_NAME, priv->fw_state);
5594                 BUG_ON(1);
5595         }
5596
5597         return;
5598
5599 fail:
5600         priv->fw_state = FW_STATE_ERROR;
5601         complete(&priv->firmware_loading_complete);
5602         device_release_driver(&priv->pdev->dev);
5603         mwl8k_release_firmware(priv);
5604 }
5605
5606 #define MAX_RESTART_ATTEMPTS 1
5607 static int mwl8k_init_firmware(struct ieee80211_hw *hw, char *fw_image,
5608                                bool nowait)
5609 {
5610         struct mwl8k_priv *priv = hw->priv;
5611         int rc;
5612         int count = MAX_RESTART_ATTEMPTS;
5613
5614 retry:
5615         /* Reset firmware and hardware */
5616         mwl8k_hw_reset(priv);
5617
5618         /* Ask userland hotplug daemon for the device firmware */
5619         rc = mwl8k_request_firmware(priv, fw_image, nowait);
5620         if (rc) {
5621                 wiphy_err(hw->wiphy, "Firmware files not found\n");
5622                 return rc;
5623         }
5624
5625         if (nowait)
5626                 return rc;
5627
5628         /* Load firmware into hardware */
5629         rc = mwl8k_load_firmware(hw);
5630         if (rc)
5631                 wiphy_err(hw->wiphy, "Cannot start firmware\n");
5632
5633         /* Reclaim memory once firmware is successfully loaded */
5634         mwl8k_release_firmware(priv);
5635
5636         if (rc && count) {
5637                 /* FW did not start successfully;
5638                  * lets try one more time
5639                  */
5640                 count--;
5641                 wiphy_err(hw->wiphy, "Trying to reload the firmware again\n");
5642                 msleep(20);
5643                 goto retry;
5644         }
5645
5646         return rc;
5647 }
5648
5649 static int mwl8k_init_txqs(struct ieee80211_hw *hw)
5650 {
5651         struct mwl8k_priv *priv = hw->priv;
5652         int rc = 0;
5653         int i;
5654
5655         for (i = 0; i < mwl8k_tx_queues(priv); i++) {
5656                 rc = mwl8k_txq_init(hw, i);
5657                 if (rc)
5658                         break;
5659                 if (priv->ap_fw)
5660                         iowrite32(priv->txq[i].txd_dma,
5661                                   priv->sram + priv->txq_offset[i]);
5662         }
5663         return rc;
5664 }
5665
5666 /* initialize hw after successfully loading a firmware image */
5667 static int mwl8k_probe_hw(struct ieee80211_hw *hw)
5668 {
5669         struct mwl8k_priv *priv = hw->priv;
5670         int rc = 0;
5671         int i;
5672
5673         if (priv->ap_fw) {
5674                 priv->rxd_ops = priv->device_info->ap_rxd_ops;
5675                 if (priv->rxd_ops == NULL) {
5676                         wiphy_err(hw->wiphy,
5677                                   "Driver does not have AP firmware image support for this hardware\n");
5678                         rc = -ENOENT;
5679                         goto err_stop_firmware;
5680                 }
5681         } else {
5682                 priv->rxd_ops = &rxd_sta_ops;
5683         }
5684
5685         priv->sniffer_enabled = false;
5686         priv->wmm_enabled = false;
5687         priv->pending_tx_pkts = 0;
5688         atomic_set(&priv->watchdog_event_pending, 0);
5689
5690         rc = mwl8k_rxq_init(hw, 0);
5691         if (rc)
5692                 goto err_stop_firmware;
5693         rxq_refill(hw, 0, INT_MAX);
5694
5695         /* For the sta firmware, we need to know the dma addresses of tx queues
5696          * before sending MWL8K_CMD_GET_HW_SPEC.  So we must initialize them
5697          * prior to issuing this command.  But for the AP case, we learn the
5698          * total number of queues from the result CMD_GET_HW_SPEC, so for this
5699          * case we must initialize the tx queues after.
5700          */
5701         priv->num_ampdu_queues = 0;
5702         if (!priv->ap_fw) {
5703                 rc = mwl8k_init_txqs(hw);
5704                 if (rc)
5705                         goto err_free_queues;
5706         }
5707
5708         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
5709         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5710         iowrite32(MWL8K_A2H_INT_TX_DONE|MWL8K_A2H_INT_RX_READY|
5711                   MWL8K_A2H_INT_BA_WATCHDOG,
5712                   priv->regs + MWL8K_HIU_A2H_INTERRUPT_CLEAR_SEL);
5713         iowrite32(MWL8K_A2H_INT_OPC_DONE,
5714                   priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
5715
5716         rc = request_irq(priv->pdev->irq, mwl8k_interrupt,
5717                          IRQF_SHARED, MWL8K_NAME, hw);
5718         if (rc) {
5719                 wiphy_err(hw->wiphy, "failed to register IRQ handler\n");
5720                 goto err_free_queues;
5721         }
5722
5723         /*
5724          * When hw restart is requested,
5725          * mac80211 will take care of clearing
5726          * the ampdu streams, so do not clear
5727          * the ampdu state here
5728          */
5729         if (!priv->hw_restart_in_progress)
5730                 memset(priv->ampdu, 0, sizeof(priv->ampdu));
5731
5732         /*
5733          * Temporarily enable interrupts.  Initial firmware host
5734          * commands use interrupts and avoid polling.  Disable
5735          * interrupts when done.
5736          */
5737         iowrite32(MWL8K_A2H_EVENTS, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5738
5739         /* Get config data, mac addrs etc */
5740         if (priv->ap_fw) {
5741                 rc = mwl8k_cmd_get_hw_spec_ap(hw);
5742                 if (!rc)
5743                         rc = mwl8k_init_txqs(hw);
5744                 if (!rc)
5745                         rc = mwl8k_cmd_set_hw_spec(hw);
5746         } else {
5747                 rc = mwl8k_cmd_get_hw_spec_sta(hw);
5748         }
5749         if (rc) {
5750                 wiphy_err(hw->wiphy, "Cannot initialise firmware\n");
5751                 goto err_free_irq;
5752         }
5753
5754         /* Turn radio off */
5755         rc = mwl8k_cmd_radio_disable(hw);
5756         if (rc) {
5757                 wiphy_err(hw->wiphy, "Cannot disable\n");
5758                 goto err_free_irq;
5759         }
5760
5761         /* Clear MAC address */
5762         rc = mwl8k_cmd_set_mac_addr(hw, NULL, "\x00\x00\x00\x00\x00\x00");
5763         if (rc) {
5764                 wiphy_err(hw->wiphy, "Cannot clear MAC address\n");
5765                 goto err_free_irq;
5766         }
5767
5768         /* Configure Antennas */
5769         rc = mwl8k_cmd_rf_antenna(hw, MWL8K_RF_ANTENNA_RX, 0x3);
5770         if (rc)
5771                 wiphy_warn(hw->wiphy, "failed to set # of RX antennas");
5772         rc = mwl8k_cmd_rf_antenna(hw, MWL8K_RF_ANTENNA_TX, 0x7);
5773         if (rc)
5774                 wiphy_warn(hw->wiphy, "failed to set # of TX antennas");
5775
5776
5777         /* Disable interrupts */
5778         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5779         free_irq(priv->pdev->irq, hw);
5780
5781         wiphy_info(hw->wiphy, "%s v%d, %pm, %s firmware %u.%u.%u.%u\n",
5782                    priv->device_info->part_name,
5783                    priv->hw_rev, hw->wiphy->perm_addr,
5784                    priv->ap_fw ? "AP" : "STA",
5785                    (priv->fw_rev >> 24) & 0xff, (priv->fw_rev >> 16) & 0xff,
5786                    (priv->fw_rev >> 8) & 0xff, priv->fw_rev & 0xff);
5787
5788         return 0;
5789
5790 err_free_irq:
5791         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5792         free_irq(priv->pdev->irq, hw);
5793
5794 err_free_queues:
5795         for (i = 0; i < mwl8k_tx_queues(priv); i++)
5796                 mwl8k_txq_deinit(hw, i);
5797         mwl8k_rxq_deinit(hw, 0);
5798
5799 err_stop_firmware:
5800         mwl8k_hw_reset(priv);
5801
5802         return rc;
5803 }
5804
5805 /*
5806  * invoke mwl8k_reload_firmware to change the firmware image after the device
5807  * has already been registered
5808  */
5809 static int mwl8k_reload_firmware(struct ieee80211_hw *hw, char *fw_image)
5810 {
5811         int i, rc = 0;
5812         struct mwl8k_priv *priv = hw->priv;
5813         struct mwl8k_vif *vif, *tmp_vif;
5814
5815         mwl8k_stop(hw);
5816         mwl8k_rxq_deinit(hw, 0);
5817
5818         /*
5819          * All the existing interfaces are re-added by the ieee80211_reconfig;
5820          * which means driver should remove existing interfaces before calling
5821          * ieee80211_restart_hw
5822          */
5823         if (priv->hw_restart_in_progress)
5824                 list_for_each_entry_safe(vif, tmp_vif, &priv->vif_list, list)
5825                         mwl8k_remove_vif(priv, vif);
5826
5827         for (i = 0; i < mwl8k_tx_queues(priv); i++)
5828                 mwl8k_txq_deinit(hw, i);
5829
5830         rc = mwl8k_init_firmware(hw, fw_image, false);
5831         if (rc)
5832                 goto fail;
5833
5834         rc = mwl8k_probe_hw(hw);
5835         if (rc)
5836                 goto fail;
5837
5838         if (priv->hw_restart_in_progress)
5839                 return rc;
5840
5841         rc = mwl8k_start(hw);
5842         if (rc)
5843                 goto fail;
5844
5845         rc = mwl8k_config(hw, ~0);
5846         if (rc)
5847                 goto fail;
5848
5849         for (i = 0; i < MWL8K_TX_WMM_QUEUES; i++) {
5850                 rc = mwl8k_conf_tx(hw, NULL, i, &priv->wmm_params[i]);
5851                 if (rc)
5852                         goto fail;
5853         }
5854
5855         return rc;
5856
5857 fail:
5858         printk(KERN_WARNING "mwl8k: Failed to reload firmware image.\n");
5859         return rc;
5860 }
5861
5862 static const struct ieee80211_iface_limit ap_if_limits[] = {
5863         { .max = 8,     .types = BIT(NL80211_IFTYPE_AP) },
5864         { .max = 1,     .types = BIT(NL80211_IFTYPE_STATION) },
5865 };
5866
5867 static const struct ieee80211_iface_combination ap_if_comb = {
5868         .limits = ap_if_limits,
5869         .n_limits = ARRAY_SIZE(ap_if_limits),
5870         .max_interfaces = 8,
5871         .num_different_channels = 1,
5872 };
5873
5874
5875 static int mwl8k_firmware_load_success(struct mwl8k_priv *priv)
5876 {
5877         struct ieee80211_hw *hw = priv->hw;
5878         int i, rc;
5879
5880         rc = mwl8k_load_firmware(hw);
5881         mwl8k_release_firmware(priv);
5882         if (rc) {
5883                 wiphy_err(hw->wiphy, "Cannot start firmware\n");
5884                 return rc;
5885         }
5886
5887         /*
5888          * Extra headroom is the size of the required DMA header
5889          * minus the size of the smallest 802.11 frame (CTS frame).
5890          */
5891         hw->extra_tx_headroom =
5892                 sizeof(struct mwl8k_dma_data) - sizeof(struct ieee80211_cts);
5893
5894         hw->extra_tx_headroom -= priv->ap_fw ? REDUCED_TX_HEADROOM : 0;
5895
5896         hw->channel_change_time = 10;
5897
5898         hw->queues = MWL8K_TX_WMM_QUEUES;
5899
5900         /* Set rssi values to dBm */
5901         hw->flags |= IEEE80211_HW_SIGNAL_DBM | IEEE80211_HW_HAS_RATE_CONTROL;
5902
5903         /*
5904          * Ask mac80211 to not to trigger PS mode
5905          * based on PM bit of incoming frames.
5906          */
5907         if (priv->ap_fw)
5908                 hw->flags |= IEEE80211_HW_AP_LINK_PS;
5909
5910         hw->vif_data_size = sizeof(struct mwl8k_vif);
5911         hw->sta_data_size = sizeof(struct mwl8k_sta);
5912
5913         priv->macids_used = 0;
5914         INIT_LIST_HEAD(&priv->vif_list);
5915
5916         /* Set default radio state and preamble */
5917         priv->radio_on = false;
5918         priv->radio_short_preamble = false;
5919
5920         /* Finalize join worker */
5921         INIT_WORK(&priv->finalize_join_worker, mwl8k_finalize_join_worker);
5922         /* Handle watchdog ba events */
5923         INIT_WORK(&priv->watchdog_ba_handle, mwl8k_watchdog_ba_events);
5924         /* To reload the firmware if it crashes */
5925         INIT_WORK(&priv->fw_reload, mwl8k_hw_restart_work);
5926
5927         /* TX reclaim and RX tasklets.  */
5928         tasklet_init(&priv->poll_tx_task, mwl8k_tx_poll, (unsigned long)hw);
5929         tasklet_disable(&priv->poll_tx_task);
5930         tasklet_init(&priv->poll_rx_task, mwl8k_rx_poll, (unsigned long)hw);
5931         tasklet_disable(&priv->poll_rx_task);
5932
5933         /* Power management cookie */
5934         priv->cookie = pci_alloc_consistent(priv->pdev, 4, &priv->cookie_dma);
5935         if (priv->cookie == NULL)
5936                 return -ENOMEM;
5937
5938         mutex_init(&priv->fw_mutex);
5939         priv->fw_mutex_owner = NULL;
5940         priv->fw_mutex_depth = 0;
5941         priv->hostcmd_wait = NULL;
5942
5943         spin_lock_init(&priv->tx_lock);
5944
5945         spin_lock_init(&priv->stream_lock);
5946
5947         priv->tx_wait = NULL;
5948
5949         rc = mwl8k_probe_hw(hw);
5950         if (rc)
5951                 goto err_free_cookie;
5952
5953         hw->wiphy->interface_modes = 0;
5954
5955         if (priv->ap_macids_supported || priv->device_info->fw_image_ap) {
5956                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP);
5957                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_STATION);
5958                 hw->wiphy->iface_combinations = &ap_if_comb;
5959                 hw->wiphy->n_iface_combinations = 1;
5960         }
5961
5962         if (priv->sta_macids_supported || priv->device_info->fw_image_sta)
5963                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_STATION);
5964
5965         rc = ieee80211_register_hw(hw);
5966         if (rc) {
5967                 wiphy_err(hw->wiphy, "Cannot register device\n");
5968                 goto err_unprobe_hw;
5969         }
5970
5971         return 0;
5972
5973 err_unprobe_hw:
5974         for (i = 0; i < mwl8k_tx_queues(priv); i++)
5975                 mwl8k_txq_deinit(hw, i);
5976         mwl8k_rxq_deinit(hw, 0);
5977
5978 err_free_cookie:
5979         if (priv->cookie != NULL)
5980                 pci_free_consistent(priv->pdev, 4,
5981                                 priv->cookie, priv->cookie_dma);
5982
5983         return rc;
5984 }
5985 static int mwl8k_probe(struct pci_dev *pdev,
5986                                  const struct pci_device_id *id)
5987 {
5988         static int printed_version;
5989         struct ieee80211_hw *hw;
5990         struct mwl8k_priv *priv;
5991         struct mwl8k_device_info *di;
5992         int rc;
5993
5994         if (!printed_version) {
5995                 printk(KERN_INFO "%s version %s\n", MWL8K_DESC, MWL8K_VERSION);
5996                 printed_version = 1;
5997         }
5998
5999
6000         rc = pci_enable_device(pdev);
6001         if (rc) {
6002                 printk(KERN_ERR "%s: Cannot enable new PCI device\n",
6003                        MWL8K_NAME);
6004                 return rc;
6005         }
6006
6007         rc = pci_request_regions(pdev, MWL8K_NAME);
6008         if (rc) {
6009                 printk(KERN_ERR "%s: Cannot obtain PCI resources\n",
6010                        MWL8K_NAME);
6011                 goto err_disable_device;
6012         }
6013
6014         pci_set_master(pdev);
6015
6016
6017         hw = ieee80211_alloc_hw(sizeof(*priv), &mwl8k_ops);
6018         if (hw == NULL) {
6019                 printk(KERN_ERR "%s: ieee80211 alloc failed\n", MWL8K_NAME);
6020                 rc = -ENOMEM;
6021                 goto err_free_reg;
6022         }
6023
6024         SET_IEEE80211_DEV(hw, &pdev->dev);
6025         pci_set_drvdata(pdev, hw);
6026
6027         priv = hw->priv;
6028         priv->hw = hw;
6029         priv->pdev = pdev;
6030         priv->device_info = &mwl8k_info_tbl[id->driver_data];
6031
6032         if (id->driver_data == MWL8764)
6033                 priv->is_8764 = true;
6034
6035         priv->sram = pci_iomap(pdev, 0, 0x10000);
6036         if (priv->sram == NULL) {
6037                 wiphy_err(hw->wiphy, "Cannot map device SRAM\n");
6038                 rc = -EIO;
6039                 goto err_iounmap;
6040         }
6041
6042         /*
6043          * If BAR0 is a 32 bit BAR, the register BAR will be BAR1.
6044          * If BAR0 is a 64 bit BAR, the register BAR will be BAR2.
6045          */
6046         priv->regs = pci_iomap(pdev, 1, 0x10000);
6047         if (priv->regs == NULL) {
6048                 priv->regs = pci_iomap(pdev, 2, 0x10000);
6049                 if (priv->regs == NULL) {
6050                         wiphy_err(hw->wiphy, "Cannot map device registers\n");
6051                         rc = -EIO;
6052                         goto err_iounmap;
6053                 }
6054         }
6055
6056         /*
6057          * Choose the initial fw image depending on user input.  If a second
6058          * image is available, make it the alternative image that will be
6059          * loaded if the first one fails.
6060          */
6061         init_completion(&priv->firmware_loading_complete);
6062         di = priv->device_info;
6063         if (ap_mode_default && di->fw_image_ap) {
6064                 priv->fw_pref = di->fw_image_ap;
6065                 priv->fw_alt = di->fw_image_sta;
6066         } else if (!ap_mode_default && di->fw_image_sta) {
6067                 priv->fw_pref = di->fw_image_sta;
6068                 priv->fw_alt = di->fw_image_ap;
6069         } else if (ap_mode_default && !di->fw_image_ap && di->fw_image_sta) {
6070                 printk(KERN_WARNING "AP fw is unavailable.  Using STA fw.");
6071                 priv->fw_pref = di->fw_image_sta;
6072         } else if (!ap_mode_default && !di->fw_image_sta && di->fw_image_ap) {
6073                 printk(KERN_WARNING "STA fw is unavailable.  Using AP fw.");
6074                 priv->fw_pref = di->fw_image_ap;
6075         }
6076         rc = mwl8k_init_firmware(hw, priv->fw_pref, true);
6077         if (rc)
6078                 goto err_stop_firmware;
6079
6080         priv->hw_restart_in_progress = false;
6081
6082         priv->running_bsses = 0;
6083
6084         return rc;
6085
6086 err_stop_firmware:
6087         mwl8k_hw_reset(priv);
6088
6089 err_iounmap:
6090         if (priv->regs != NULL)
6091                 pci_iounmap(pdev, priv->regs);
6092
6093         if (priv->sram != NULL)
6094                 pci_iounmap(pdev, priv->sram);
6095
6096         pci_set_drvdata(pdev, NULL);
6097         ieee80211_free_hw(hw);
6098
6099 err_free_reg:
6100         pci_release_regions(pdev);
6101
6102 err_disable_device:
6103         pci_disable_device(pdev);
6104
6105         return rc;
6106 }
6107
6108 static void mwl8k_remove(struct pci_dev *pdev)
6109 {
6110         struct ieee80211_hw *hw = pci_get_drvdata(pdev);
6111         struct mwl8k_priv *priv;
6112         int i;
6113
6114         if (hw == NULL)
6115                 return;
6116         priv = hw->priv;
6117
6118         wait_for_completion(&priv->firmware_loading_complete);
6119
6120         if (priv->fw_state == FW_STATE_ERROR) {
6121                 mwl8k_hw_reset(priv);
6122                 goto unmap;
6123         }
6124
6125         ieee80211_stop_queues(hw);
6126
6127         ieee80211_unregister_hw(hw);
6128
6129         /* Remove TX reclaim and RX tasklets.  */
6130         tasklet_kill(&priv->poll_tx_task);
6131         tasklet_kill(&priv->poll_rx_task);
6132
6133         /* Stop hardware */
6134         mwl8k_hw_reset(priv);
6135
6136         /* Return all skbs to mac80211 */
6137         for (i = 0; i < mwl8k_tx_queues(priv); i++)
6138                 mwl8k_txq_reclaim(hw, i, INT_MAX, 1);
6139
6140         for (i = 0; i < mwl8k_tx_queues(priv); i++)
6141                 mwl8k_txq_deinit(hw, i);
6142
6143         mwl8k_rxq_deinit(hw, 0);
6144
6145         pci_free_consistent(priv->pdev, 4, priv->cookie, priv->cookie_dma);
6146
6147 unmap:
6148         pci_iounmap(pdev, priv->regs);
6149         pci_iounmap(pdev, priv->sram);
6150         pci_set_drvdata(pdev, NULL);
6151         ieee80211_free_hw(hw);
6152         pci_release_regions(pdev);
6153         pci_disable_device(pdev);
6154 }
6155
6156 static struct pci_driver mwl8k_driver = {
6157         .name           = MWL8K_NAME,
6158         .id_table       = mwl8k_pci_id_table,
6159         .probe          = mwl8k_probe,
6160         .remove         = mwl8k_remove,
6161 };
6162
6163 module_pci_driver(mwl8k_driver);
6164
6165 MODULE_DESCRIPTION(MWL8K_DESC);
6166 MODULE_VERSION(MWL8K_VERSION);
6167 MODULE_AUTHOR("Lennert Buytenhek <buytenh@marvell.com>");
6168 MODULE_LICENSE("GPL");